Pumps for supplying concrete. Concrete pump: features of the use of screw and piston models. Transportation of concrete. Operating principles of the equipment

Provided for rent with o/p
mortar pumps (pneumatic blowers)
Strojstav PX 500 with compressors
for pumping cement mortar
for pouring (screeding) floors.

The MIKHTECH company provides for rent with service personnel:

- pneumatic mortar pumps
intended for the preparation and supply of various mixtures, concrete, expanded clay concrete, sand concrete, dry and semi-dry mixtures, etc.);

- piston mortar pumps
designed for creating and supplying special plaster mortars from sand, lime, cement. Pouring mortars for installing screeds;

- auger (screw) pumps - plastering machines
supply liquid mortar for plastering work.

Range and technical characteristics of mortar pumps and plastering stations

Model	Feed volume	Supply pressure	Feed range up/horizontally, m	Appearance
Pneumatic mortar pumps
Mortar pump Putzmeister M 740 D - rent
Mortar pump Putzmeister Mixokret M 501 E - rent
		7
Pneumatic compressor PN-500 - rent
Piston pumps
Mortar pump Putzmeister P 13 EMR - rent
Mortar pump Putzmeister P 13 DMR - rent
Mortar pump Putzmeister P 715 - rent
Screw or screw mortar pumps (plastering machines)
Multi-purpose mixing mortar pump Putzmeister P 12 Sprayboy - rent
Plastering station Putzmeister MP 25 MIXIT - rent	25 l/min		15/40
Universal screw (screw) mortar pump Putzmeister SP 11 - rent	55 l/min

mortar pump PX-500

Pneumatic mortar pumps

Pneumatic operating principle of mortar pumps ensures pumping of hard solutions (expanded clay concrete, concrete, semi-dry cement-sand mixture screed, sand concrete, sand, etc.), which piston and screw mortar pumps cannot cope with.

The delivery range and height of the mortar pumps depends on the performance (modification) of the mortar pumps and the performance of the compressor.
The principle of operation is that the solution is placed in a sealed reservoir of a pneumatic blower and, under the action of compressed air, is supplied in portions and transported through a concrete pipeline.

Productivity up to 6 m 3 /hour.

Piston mortar pumps

Purpose:

• plastering work;
• shotcrete;
• filling hard-to-reach places before spraying cement-sand mortars using a setting accelerator (silicate).

Capacity up to 115 l/min.

Screw mortar pumps

Purpose:

• for working with dry mixture and ready-made solution;
• for working with ready-made or on-site exterior plasters, high-quality decorative plaster mortars, lime-cement plaster mortars, light masonry mortars, screed mortars;
• for finishing finishing solutions, putty, sealing masses, adhesives, liquid plaster solutions.

Capacity up to 55 l/min.

Mortar pump (pneumatic blower): prepare and supply the solution using one piece of equipment

In an effort to reduce the labor intensity of construction work and minimize the construction time of buildings, designers are creating new types of equipment and machinery. An example of a successful combination of two different functions in one equipment can be considered mortar pump(or pneumatic supercharger).

As the name suggests, compressed air is used to move the solution. The mixture is prepared in a closed tank using rotating blades, which simultaneously push it towards the outlet. Additional pressure is created by the flow of lower air, which ensures uniform supply of the solution through the hoses. This design minimizes the risk of hose clogging and premature failure of all equipment.

Using a pneumatic mortar pump you can:

• quickly prepare a solution from dry ingredients directly on the construction site
• take the almost finished solution from the mixer and refine it
• ensure direct supply of the solution to the place of its installation

Mortar pumps with the same productivity in less than a minute they are able to prepare coarse and fine-grained concrete, masonry, plaster mortars and even polystyrene concrete. Pneumatic compressors have proven themselves well in the construction of semi-dry screeds.

The main advantages of mortar pumps:

• the solution is prepared immediately before laying, so its heterogeneity or partial setting during delivery to the construction site is excluded
• the composition of the mixture for the prepared solution can be any, including the inclusion of lime or waterproofing additives
• mortar pump Can also be used to prepare foam concrete
• solutions with a regular percentage and a low percentage of water are pumped equally well
• equipment operation does not require large energy consumption
• mortar pumps The Strojstav brand offered by our company is reliable in operation and, if necessary, suitable for repair
• for supplying solution from pneumatic supercharger Concrete pipes of various diameters can be used at the work site
• long service life due to the absence of wearing parts
• relatively light weight and dimensions pneumatic blowers, as well as the presence of a pneumatic chassis, allow them to be used on small sites and easily moved
• lower than that of concrete pumps similar in power and conditions of use for certain types of work, price

Plastering stations: convenient, profitable, fast

The second representative of such equipment, combining several functions, is plastering stations. They are used to prepare a solution, pump it to the work site and apply it directly to the surface.

The main benefits of using plastering stations:

• fast mechanized plastering of large surfaces, reducing work time by 3 times. Equipment productivity is on average 200-500 sq. meters of processing per shift
• minimizing manual labor during finishing work on site, allowing workers to be freed up to perform other types of work
• maintaining uniform thickness of the layer of applied plaster

What STROJSTAV plastering stations can do

• prepare solutions for plastering work with any composition, including additives that ensure the decorative effect of the plastered surface
• Some models of plastering stations can work without connecting to a water supply. A special valve allows them to take the amount of water required for the mixture from any container
• move the prepared solution over distances of up to 40 meters and raise it to a height of up to 20 meters
• apply the prepared solution to vertical and horizontal surfaces indoors and when performing exterior finishing buildings
• It is easy to cope with the installation of self-leveling floors.

At MIKHTECH you can not only buy one of the offered models of a mortar pump or plastering station, but also rent this equipment for the required period. The personnel servicing this equipment have passed good preparation, which allows us to guarantee uninterrupted operation on site and the highest quality of work.

Compare the prices for renting and purchasing equipment in this table and choose the option that suits you. Our specialists will advise you on the required performance of the mortar pump (pneumatic blower) or plastering station for the scope of work. We will try to coordinate the delivery time of equipment to the site in the most convenient way for both parties.

Concreting is the most common type of work in construction; it is used in most areas. To make working with heavy mortar easier, special devices for preparing and transporting cement have become widespread. The simplest but most expensive way to move mortar is with a concrete pump, but the cost of installation puts off small firms. It is possible to create a concrete pump with your own hands, and the costs will be 30-40% less.

Operating principle of a concrete pump

A concrete pump is a device with the sole task of preparing and delivering concrete from the mixing point to the target area. The installation is based on pipelines or concrete pipes that transfer the solution to any location. The greatest need arises in monolithic construction and when creating reinforced concrete structures.

Mobile concrete pump with high capacity on a crawler chassis

To understand the method of constructing the installation, you should know how a concrete pump works. The operating principle of a concrete pump is based on the properties of the liquid - it displaces and fills the changing volume of the system. If the volume is completely filled with the mixture, the solution is discharged into the concrete pipeline and then to the target area.

The design and principle of operation of a concrete pump is divided into several groups:

• piston Perform a constant feed at various distances. Modern devices are capable of displacing liquid to a height of 6-65 m. The volume of the supplied mixture reaches 180 m3/h. It is not durable due to the risk of small elements of cement getting in. Has a jerky delivery principle.
• hose (screw). Provide continuous transportation. Gerotor pump for concrete provides large volume transported material. The installation is characterized by silent operation when pumping compounds of any consistency. If a blockage occurs, it is broken through by reversing the engine. A gerotor pump for pumping concrete has one significant drawback - the hose has a short service life, but the structure can easily be repaired independently;
• with hydraulics. If there are hydraulic units for working with concrete, the devices become more durable and smoothly transfer the solution (without jerking or changing speed). Hydraulics help pump liquid to heights and long distances. The hydraulic drive is made as simple as possible; the device results in low energy consumption. Hydraulic pumps help pump mortar containing lightweight aggregates and are easy to operate and maintain.

Construction of a piston concrete pump

Drawings of concrete pumps for DIY production differ significantly depending on the type. All models differ in design, but have similar disadvantages to a greater or lesser extent:

• the use of rolling stock is mandatory;
• limited transportation range;
• demands on the composition of the solution.

The price of a homemade concrete pump directly depends on the required power and pipe diameter. For larger pipes the pressure decreases. Recently, concrete pumps (the ability to supply concrete to a target area of ​​​​various distances) and concrete pumps (smaller dimensions and mobility) have become very popular.

Unit types

Conventionally, devices are divided into 2 categories: with a mechanical unit or a hydraulic element. Rotary and piston concrete pumps have their own operational advantages and disadvantages.

Operation of the piston system

Piston systems operate on the same principle in all applications. At the stage of downward movement, a certain volume of liquid and concrete receiver is sucked in; in the second cycle of work, the solution is pushed out into the transfer sleeve. The mixture is supplied to the working area through the pipeline.

Mechanical driven piston concrete pump

The operation requires the use of a slide gate, which opens the concrete receiver during the suction stage and closes it during the ejection process. The gate regulates the direction of fluid flow. During testing, it is necessary to add machine oil to the working mixture.

The design includes a mechanical drive or a hydraulic system. Modern concrete pumps work with hydraulics, since the system is highly efficient, it leads to the formation of greater pressure and increased pump power. Compared to the connecting rod assembly, hydraulic system provides a larger piston stroke range and smoother movements. A potential problem is loose contact between the piston and the chamber. Microscopic particles of cement penetrate between the piston and cylinder, accelerating wear many times over.

Devices with 1 cylinder are practically not used, as they lead to a pronounced pulsation of the solution supply. Mostly, two cylinders are built into the system; they work alternately - so the concrete is supplied smoothly and continuously. Also, a mechanism with two cylinders wears out less.

Rotor system operation

The use of rotary concrete pumps is much more common, since pistonless systems are more reliable. It is based on a rotor with fixed rollers (covered with rubber). As the rotor rotates, the rollers move, transferring the mixture from the concrete receiver to the working hose. An important advantage is the reverse function to remove air pockets and blockages.

Design of a rotary concrete pump

Equipment operation and repair are easier. The weak point of the structure is wear of the hose or seals - both faults can be easily eliminated with your own hands. Other disadvantages include low power (compared to the piston type) and poor tolerance of coarse filler.

There are also screw pumps for pumping concrete, but they are inferior in durability and performance. Their operating principle is elementary: a screw is placed in a through chamber, which displaces the substance during rotation.

Rotary mechanisms are presented in many modifications, the main difference being the method of placement: stationary and automotive.

Unit mounting options

Stationary pumps

Before making a concrete pump with your own hands, you should decide on the type of base it will be based on. The stationary option is a separate station for pumping the substance. Dimensions vary widely; there are concrete pumps for small-scale construction and the construction of industrial facilities. A chassis is often installed for movement.

A mobile structure without a chassis predominantly has high power; it is recommended to use a concrete pump to supply large-scale construction, most often high-rise buildings, with the substance. If there is a chassis, transportation over long distances is not provided; they are intended for movement within one area.

Stationary mixer and concrete pipeline

Today, a new type has been developed - a towed device; it is distinguished by a powerful chassis that allows the installation to be moved over long distances by a tractor. For the construction of private housing or household structures, a mini concrete pump with a piston mechanism has been created, less commonly found with a pneumatic drive. It helps when working with small orders or in cramped conditions.

The pneumatic installation is designed to work with homogeneous cellular solutions, is characterized by low power and the need to connect a compressor, but stable supply solution.

Pumps on a car base

The automotive type of pump is the most common in all areas of construction. Like other gardening equipment on wheels, the concrete pump can be easily moved independently, and also has characteristic differences:

• a stationary station with high power is applicable exclusively for large-scale construction; it is expensive to maintain and unmaneuverable. The car version is able to drive up to most objects;
• for stationary type units, special power supply is required, in construction conditions It can be difficult to create the right conditions. In a concrete pump truck, power comes from the machine installation;
• a small pump has low performance, and the cost of installation is not affordable for all contractors. In terms of savings, renting a car unit is cheaper, and in addition it helps to complete the job many times faster;

Pumps on a car base

• Modern auto complexes have a built-in retractable boom, which simplifies the delivery of the solution to target areas with difficult access or located at height. If a boom is not applicable, a line pump is used to help pump the solution up to 1 km and 120 m in height;
• thanks to professional operator in the equipment cabin, the customer is relieved of all risks of equipment breakdown.

Concrete pump – buy or make it yourself?

There are many offers on the used special equipment market, but first you should think about the feasibility of the purchase, because there is an option to make a concrete pump yourself. Basic skills will be required to create the installation. Homemade installations are less powerful and have a simple design, and when correct production they work properly and smoothly.

Initially, it is important to decide on the operating principle of the concrete pump: piston or hydraulics. The piston type is the simplest, but leads to rapid wear of the unit elements due to constant friction. Hydraulics are much better in performance, but are more difficult to manufacture. It is possible to make an automatic concrete pump, but they are less powerful.

Before starting to make a concrete pump with your own hands, important attention is paid to the gate - this is a kind of valve that ensures high-quality adhesion between the concrete pipe and the pump. The operation of the structure depends on the correct choice of gate.

DIY concrete pump

How to make a concrete pump - production technology

During the work process you will need auxiliary tools, the desired measure is thermal insulation. A do-it-yourself gerotor pump is made according to a single scheme. Key points for assembling a concrete pump:

• Assessment of the feasibility of production. For large-scale construction, it makes sense to purchase your own installation. For small and medium volumes of work, it is profitable to rent a concrete pump. A homemade concrete pump is a relatively complex and expensive process.
• Creating a drawing. The concrete pump diagram is simple; its design will require minimal design skills or use existing schemes. Self-production is more the hard way, but allows you to create a design for specific needs. The use of ready-made diagrams is convenient due to the reduction in time costs and the ability to study reviews about the shortcomings of the drawing or find ways to improve the design in them.
• Selection of cylinder and piston. The key element of the system should be selected with a power reserve. The maximum cylinder diameter is 400 mm, it is better to choose smaller models. The piston stroke estimate is from 50 cm. If the parameters do not match, the number of working cycles increases, and as a result, rapid wear.
• Adjustment of piston and cylinders. In order for the pump to serve for a long time, it is necessary to perform high-precision fitting and eliminate roughness.
• Selection of node type. An electromechanical pump will help reduce the complexity and cost of manufacturing the device. The hydraulic option can be prepared manually, but this will increase costs and complicate the process.
• Gearbox installation. The mechanism must include a gear ratio to reduce and convert rotational movements into translational ones.
• Installation of the king pin. The element is connected to the mechanism. A metal corner is used to prepare the welded frame. The system incorporates alloy steel check valves and is wear-resistant.

After preparing the parts and assembling the pump, all that remains is to check the functionality of the installation. It is prohibited to start the device without concrete or a specialized starting mixture (manually made from cement with water and the addition of automobile oil).

Concrete pump drawing

Application of concrete pumps in construction

Monolithic high-rise buildings are almost always built using a concrete pump. The installations help deliver concrete to any floor with minimal time and physical costs.

With regard to private construction, the situation is somewhat more complicated, since access to the site for special equipment is limited, and manual preparation of the solution is an extremely lengthy procedure. Automotive units are quite large; in working condition, the equipment takes up up to 12 m in width; using a boom requires even more space, up to 70 m. Mini concrete pumps will help eliminate the problem, simplifying the task and speeding up construction.

Order concrete with a concrete pump for small construction possible in combination with a KamAZ truck, on which the line is fixed: 2 pipes with connecting clamps. An improvised concrete pump with a KamAZ truck is the largest version of a concrete pump.

If no truck arrives at the site, assembly must be done manually, but the participation of 2 or more people is required. Potential problems with manual installation:

• line rupture. There is a lot of pressure in the system, the clamps are not always able to withstand the pressure. Pulling out the fastener creates a hole. You will have to stop the system, clean the pipeline and make a more durable fastening;
• relocation of the highway. When changing jobs, it is necessary to move the pipe, but this cannot be done together with the solution. The lines will have to be disassembled, cleaned and reinstalled.

The long time it takes to set up the operation of the equipment is still significantly less than mixing the mixture manually.

Application of concrete pumps in construction

Advantages of automatic concrete pumps

Automatic production plants have numerous advantages:

• There is a built-in electronic control unit that monitors the correctness and continuity of operation. The operator selects the operating mode, and the unit independently regulates the operation of the installation;
• independent flushing system for pipes and pump. Reduces time spent on maintenance and clearing congestion;
• lighting the surrounding area for working with the concrete pump after dark;
• sound alerts about major events;
• adjustment of gaps in the concrete distribution unit;
• All pumping units supplied with a flushing system, special software and a concrete pipeline up to 80 m;
• as an option, manufacturers offer a concrete distribution boom, which simplifies the delivery of concrete to the target location;
• full compliance of engines with EURO-4 standards;
• Reliable spare parts are used to increase durability and reduce maintenance costs.

The construction of even small structures requires the use of a variety of tools and techniques:

• The most common area of ​​use for a concrete pump is foundation formation. For the pile type it is convenient and cheap to use;
• a monolithic structure always uses a metal base. will speed up the creation of the frame;

• Concreting is often combined with the use of other building materials. If the amount of work is large enough, it will be useful or;
• After erecting a structure, you always have to drill holes for electrical wiring, fixing equipment, etc. - it's simple and reliable way laying communications in the walls, the method is applicable for any other drilling work;
• at the final stage of arranging the building, it will be useful; with its help, the holes will be even, and a box for an outlet can easily be placed in them.

Conclusion

A concrete pump is a complex construction equipment that is not easy to make on your own, but if you have the skills and time, the work is quite doable. Manufacturing options are more functional and efficient, but are expensive. If you want to save money, you often rent a concrete pump.

Pumps for liquid solutions are specialized construction and industrial equipment designed for the preparation, mixing and subsequent supply of mixtures of various consistencies. Most often they can be found on construction sites, where they are used to mix plaster mortars, concrete or glue. It is also necessary to remember that this category of pumping equipment has a number of specific requirements for selection and operating conditions, non-compliance with which leads to a reduction in service life and the impossibility of further operation. More detailed information about the purpose and requirements can be obtained on the MSHT website.

Pump Applications

In fact, the design of pumps for supplying liquid solutions is quite simple and unpretentious, so such equipment can be operated without problems in any production and weather conditions. This is due to the fact that many construction and repair work is carried out either in hot or cold period of the year. In addition, if we take into account the short deadlines for completing construction, work sometimes does not stop even in bad weather.

Such installations are capable of pumping both fairly viscous and thick mixtures resulting from mixing liquid and bulk ingredients. In addition, some models are capable of transferring solutions with a small amount of solid particles, such as fine gravel.

Specialized Requirements

The type and design of construction pumps depends on the tasks for which they are designed. So, for example, peristaltic and membrane pumps are suitable for pumping various plaster solutions, and slurry pumps are suitable for pumping concrete or cement. There are also models of gear pumps designed to supply hot bitumen mastics. However, regardless of the type and purpose of pumping equipment, it is subject to practically the same requirements, namely:

• For construction needs, sufficiently powerful units are needed that do not require frequent, specific maintenance. The design and device of such a pump must be simple and reliable at the same time, ensuring the possibility of long-term operation in almost any conditions, without the risk of stopping or downtime of production.
• The equipment must operate in a wide range of temperatures, both ambient and indoors, as well as in dusty conditions. In addition, all parts and important components must be made of materials that have increased resistance to chemical, active, aggressive and corrosive substances.
• Such equipment should not be clogged with the constituent components of the pumped solutions, and the design should facilitate quick assembly/disassembly for effective cleaning of the flow part.

Failure to comply with the above requirements often leads to damage to equipment components, failure and, as a consequence, suspension of production work.

Types of solution pumps

Modern manufacturers pumping equipment offer a wide range of models designed to perform production tasks for various purposes. So, for example, construction pumps equipped with a laminar impeller can be used in Food Industry, and centrifugal ones where there is a need to pump out various types of liquids from tanks, reservoirs and other containers. However, the main purpose of such models is still construction, where they solve several problems at once, namely the transportation of viscous solutions for mixing, mixing, and pumping air from pipelines.

In addition, construction models can be used in a wide variety of additional tasks. Thus, they are often used for transporting cementitious liquids, lime and paint solutions at high temperatures, as well as process water. Such equipment is also suitable for pumping out foreign liquids that fall into a trench or are used as a component for preparing mixtures.

There is also a type of pumps whose purpose is to pump liquid, active chemicals that can corrode surfaces made of metal and other materials. That is why such models are characterized by increased strength of key components and parts, reliably protected from the effects of acids and alkalis.

One of the main requirements for the operation of devices working with aggressive substances is tightness and the ability not to become clogged with sediments of toxic chemicals. There are modifications designed for saline or acid solutions, as well as the most accurate dosage of the mixture.

Centrifugal pumps for pumping liquid solutions of medium viscosity operate due to the centrifugal force created by the movement of the blades. They are capable of transporting denser and more viscous compounds. Thanks to this, this type of pump is an indispensable attribute for pumping large volumes of liquid mixtures during repair and construction work.

www.stroysmi.ru

for water, viscous liquids, submersible

Content

Screw pumps, also called screw pumps, are highly efficient units. Their functional characteristics are not determined by the installation location and the properties of the pumped liquid. The screw pump is able to cope with the flow of water, which may contain a large number of insoluble and soluble particles.

Installation of equipment can be vertical or horizontal, the position of the unit varies.

Design and principle of operation

This pump is a variant of a rotary unit. This equipment has become popular due to its use as a pump for viscous liquids. One of the areas of application is the removal of wastewater characterized by high viscosity from the sewer system.

The operating principle of a screw pump is similar to that of a gear device. The screw pump is simple. The rotor, which is a propeller with blades, is located inside a cylindrical housing. The size of the rotor is selected so that it can move freely, but at the same time the gap between the wall in working condition is minimal. There are pipes installed on both sides of the unit.

The equipment functions as follows:

• the pump is lowered into a well (well or pit for sewage), directly into the liquid medium and connected to the power supply;
• using the first pipe, the liquid is sucked into the body;
• When the rotor rotates, the screw blades of the pump force water inward and direct it along the body to the outlet pipe.
• The water comes out through the outlet pipe.

This is the design and operating principle of a simple screw pump for water and other liquids. In more complex designs there is an increased number of screws and steps.to menu

Scope and purpose

The purpose of this equipment is to pump any media: from discharged steam to a suspension of medium viscosity, while the screw design is capable of solving all the tasks assigned to it. Most often they are used as a pressure generator:

• in individual water supply systems, which are assembled by professionals or independently. The pump can be used not only in completely clean wells and boreholes, but also in mines with sand. In wells with big amount sandy sediments, a submersible unit, for example, an octopus pump, shows good results;
• in systems for pumping and pumping liquid mixtures. They are used in construction, drying structures, pipelines, and industrial units. This is explained by the fact that they are used for various media: from steam to liquid cement. An example is the use of the aspro g700 screw pump for cement mortars. The KSG screw pump is used for injection of cements. In heavy industry, equipment is used for pumping suspensions, paints, anti-corrosion agents, etc. food production they are used for pumping fats, juices, honey, etc. In the production of cosmetics, they are used for pumping creams, solutions, shampoos, etc.;
• in systems for dosing liquids. The screw in this case serves as both a dosing and generating mechanism. Portion accuracy does not change in any pump position. They are used for dosed supply of polymer materials, polyelectrolytes, flocculants and other complex chemical liquids that are difficult to pump. For such purposes, stationary surface equipment is often used.

Such pumps can be easily installed independently, they do not require constant inspections and can last for a long time.

SCREW PUMP FOR CEMENT MORTAR, PLASTERING MACHINE-STATION (VIDEO)

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Types of pumps

The following units are currently popular:

1. Aquarius. Compact pump with a diameter of up to 0.1 m with a capacity of 2000 l/h. A very simple unit, used in wells and boreholes. Allows you to supply water to the water supply system of private housing construction or use it for irrigation and various technical purposes. To pump water out of the mine, the pump is suspended on a synthetic cable, and in an open reservoir the pump can be used in any position. This practical unit is inexpensive and you can install and dismantle it yourself.
2. A barrel screw pump is used to pump water from different reservoirs. Models from different manufacturers are characterized by common features: low power and small dimensions, units are made only from very durable materials that do not corrode and withstand aggressive environments. They are easy to use, easy to disassemble and transport. This is equipment with specific qualities that allow pumping both water and alkaline or acidic media.
3. Belamos is a deep well pump, well built and equipped with high quality components. They are very reliable and can work for a long time without interruption. It has protection against overheating, dry running and other damage. Such equipment is good for use in quicksand and deep mines. They are installed independently within a few minutes, and their high power makes it possible to quickly pump out dirty streams and fully provide all household needs, including watering the site and an autonomous water supply system. The unit is mounted on the surface and therefore cannot be sunk.
4. Unipump ECOVINT is used for wells and wells with minimal aquifer debit. Small dimensions and high throughput make such pumps especially suitable for dachas. It is easy to install in a small diameter casing pipe and can provide water supply for small family. Installation of the pump can be easily done by almost anyone. Such pumps practically do not vibrate during operation, so turbidity will not appear at the bottom of the source and the filtration cone will not be destroyed.

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Operating rules

To prevent equipment breakdowns, the following rules must be observed:

• for pumping viscous media, pumps with a power of 300 rpm are used;
• transportation of viscous media requires the use of stuffing box seals, which require tightening over time;
• when calculating the resistance for pumping viscous media, it is necessary to take into account the material and length of the pipeline, height differences;
• equipment must be used under the flood to prevent dry running;
• It is better to wash solid sediments in front of the camera before starting. The device is equipped with crushers at the entrance to the unit. This will protect against wear and prevent fibers from wrapping around the rotor.

Screw pumps make it possible to effectively cope with the tasks of creating individual water supply systems for summer cottages, cottages and country houses. They are characterized by reliability, low noise, ease of maintenance and repair, unpretentiousness and relatively low cost. Using them in the system autonomous water supply- This is a worthwhile investment of effort and resources.

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byreniepro.ru

Portal about pumps. Screw pump (for water, viscous liquids): submersible, clay pump

Content

A device such as a screw pump is often called a screw pump. High efficiency The unit is determined by the fact that its functionality does not depend either on the design of the housing or on the quality of the medium that needs to be pumped.

This device can be used in conditions where the liquid is heavily contaminated or has high viscosity. It can be placed in a vertical or horizontal position.

Operating principles of the equipment

Screw pumps are a modification of rotary gear pumps. The principle of their operation is based on pumping liquid between the body and the screw recesses along the length of the screw core. The equipment has a smaller number of gears, and the teeth themselves are located at a large angle of inclination.

Screw pumps operate without contactors. The connection occurs through the stator. Thanks to this design, a different circulation principle is implemented. The rotor does not just rotate, but performs planetary movement, accordingly, the axis rotates along the orbital line. The parts of the pump operating in the on-mode consist of a stator and a rotor. All the parts together represent a special, highly efficient mechanism.

The main operating units are a screw pair of cycloid engagement. The rotor is the moving part of the operating couple mechanism. It performs planetary rotation inside the stator. On top of the stator surface there is a spiral shape that moves several times more intensely than the stator itself. Due to the fact that they are constantly in contact and combined, several closed areas appear.

As the screw moves, the area located on the pump inlet side expands. Thus, there is an increase in volume and, accordingly, a vacuum. The cavity is filled with the pumped substance. The screw teeth are inserted into the holes of the combined screw, and the transported medium does not flow back.

By moving the screw, the separated liquid is pumped towards the discharge side. The number of closed sections per unit of length of the operating working pair affects the resulting pressure of the pumping apparatus. The volume of each such section determines its productivity.

The pressure of the pumped substance increases due to the movement of screw metal rotors inside the stator. If you set a certain speed of movement of the screw, then the pumped substance and its volumes will be constant.

Screw pumps for viscous liquids are designed to create a constant, constant discharge. At the same time, you can regulate the productivity process without losing the main pressure.to menu

Purpose and scope of the units

Using a device such as a deep-well pump, it is possible to pump various transported substances. The equipment copes with media such as gas, rarefied steam, water, viscous mixture, etc. In any case, the technology will solve all the tasks assigned to it.

Screw pumps are widely used:

1. As the main generator that creates the necessary pressure for an autonomous water supply system. Such devices can be used even in very polluted environments, and not only in relatively clean wells and boreholes. In cases where it is necessary to pump viscous substances, a submersible or deep type is usually used. They work smoothly in deep holes.
2. As a unit that supplies pressure for transporting liquid substances. Such equipment is used on construction sites, in pumping or drainage areas, as well as in the production of main pipelines. Such widespread use of equipment is due to the fact that screw pumps can cope with pumping even liquid concrete and bulk substances.
3. As generators for creating pressure in systems where pumping and supply of liquid must be dosed. The auger here works both as the main generator and as a dispenser capable of measuring the exact amount of water or other substance.

Among modern pressure equipment, screw pumps occupy one of the first steps in terms of frequency of demand and application.to menu

Screw pump for cement mortars, plastering machine station (video)

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Advantages and disadvantages

The most widely used among screw electric pumps are screw ones, as they have a number of advantages:

• high-quality uniform supply of pumped substances, without pulsation;
• the ability to transport solid or granular media, as well as gaseous substances;
• pumping viscous liquids;
• can be used when working with toxic and aggressive products;
• pumps operate on the principle of self-priming;
• you can adjust the productivity during operation without suppressing the injection speed;
• works silently;
• ease of operation;
• does not require frequent replacement of parts.

Despite all the advantages, this equipment still has several disadvantages:

• high cost and complexity of equipment production;
• regulation of the working volume of productivity is excluded;
• imperfect cooling function.

Most popular models

Quite a lot of time has passed since the appearance of the first device, and it has undergone significant changes. However, the basic principle of operation remains unchanged. The screw shaft creates a vacuum by pumping a certain volume of substance towards the discharge section.

List of equipment models that are chosen more often than others:

1. SPRUT borehole pumps. They are used for pumping clean water from wells and wells.
2. Aquarius pump. Compact and quite productive device.
3. Belamos deep well pumps. Reliable, distinguished by excellent assembly and high-quality components. Thanks to the power they are able to solve even complex tasks.
4. KSG series pumps. Small-sized equipment, light weight.
5. Pumps for cement mortars aspro g700. Multifunctional injection unit for supplying cement mortar.

The operating principle of screw pumps and a number of advantages guarantee reliable and high performance units in operation with any environment.

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Solution pump| TD Tekhmash

Pumps for solutions are specialized equipment that is designed for mixing, preparing and supplying solutions of various consistencies. Most often, such a tool can be found on construction sites when preparing various specific mixtures: concrete, plaster mortar, wallpaper glue, etc. This type of pump has a number of specialized requirements, non-compliance with which leads to complete destruction of the device and the impossibility of further operation of the product.

In fact, the solution pump is very simple in its design, it is easy to use every day, easy to move, can be exposed to rain or snow and can work even in low temperatures. This unpretentiousness is due to the fact that many construction works are carried out either during particularly hot or cold periods, and if the time for completion of construction is constantly approaching, then even in bad weather. Pumps are capable of transferring both viscous mixtures and thick ones, which are obtained as a result of mixing bulk and liquid ingredients. Also, some pump models can transfer mixtures with a small amount of solid particles.

Construction pumps can be used in a variety of subtasks. Thus, pumps for pumping solutions often transport cementitious liquids (including liquid cement), paint and varnish solutions at high temperatures, lime mixtures and water for construction purposes. This type of pump can also be used to pump out dirty liquids that end up in a trench and are no longer used as mix material.

As for more compact pump models, they are also used in the chemical industry. Such a device is capable of working with aggressive substances, does not dissolve under the influence of various toxic chemicals, and does not become clogged with sediment. Among them are those that are designed for the most accurate dosage, for saline or acid solutions.

Types of pumps for pumping solutions

• Construction pumps with laminar type impeller. Preferably used in the food industry. Laminar-type centrifugal pumps are often found where there is a need to pump viscous and other liquids from tanks and various containers. The pump has also found its application in construction. The pump is capable of solving two problems at once: transferring viscous liquids into containers for mixing building materials and pumping air out of pipelines;
• Chemical pumps for transferring construction liquid solutions. Active chemical substances, capable of corroding metals and other surfaces, are used in construction for various purposes. So, to transmit them with pressure, it is best to use specialized chemical pumps, the connections of which are firmly protected from the effects of acids and alkalis;
• Centrifugal pumps for transferring medium-viscosity liquids. Pumps that rely on the centrifugal force generated by the movement of blades to operate are capable of pumping more viscous and dense liquids. In construction, these types of pumps are an indispensable attribute for transferring large volumes of liquid materials.

If you want to make the construction process easier and make it even better, then you need to contact the TECHMASH Trading House for a new pump. We supply products directly from the factory and guarantee the stability of their operation. Our construction pumps for mortars are popular with both large construction companies and individuals who choose to cooperate with us in order to equip their homes.

We will help you understand the features of each model, choose for yourself the one that will be optimal in both price and quality, and find a way out of any difficult situation. "TECHMASH" is a guarantor of the durability of your building.

tdtechmash.ru

rastvoronasos.ru

Pumps for solutions - Chemist's Handbook 21

Calculate the design capacity of the solution pump

K-- - column for leaching hydrogen sulfide K-2 - extraction column K-5 - column for regenerating caustic soda solution K-4 - column for methanol regeneration T-1 - heat exchanger for using the heat of regenerated caustic soda solution T-2 - condenser vapors of mercaptans and aqueous methanol T-3 - boiler T-4 - methanol vapor condenser T-5 - boiler T-b - caustic soda solution refrigerator) E-i - settling tank E-2 - decanter for separating mercaptans from an aqueous solution of methanol -5 - intermediate tank of regenerated methanol pump for original gasoline I 2 - pump for purified gasoline N-5 - pump for caustic soda solution N-4 - pump for water N-5 - pump for methanol 1 - input of caustic soda solution 2 - input of original gasoline 3 - output of purified gasoline into a commercial container 4 - output of mercaptans.

U-reactor 2-intermediate collector 5-separator 4-pump for catalyst solution 5-columns for vacuum evaporation Lines /-ethylene oxide //-carbon dioxide ///-circulating carbon dioxide IV-to the atmosphere V-light components VI-catalyst solution VII-commercial ethylene carbonate

In an absorption machine, the role of a compressor is performed by a combination of a boiler and an absorber with a control valve and a solution pump (Fig. 83). This kind of thermal compressor circulates a solution - weak when leaving the boiler and strong when leaving the absorber.

E - pump for solution b - operating cycle.

In a diffusion-type absorption machine there is no pump for the solution and no valves between the devices. The energy consumption for evaporating the solution is almost 2 times higher compared to a compression machine of the same performance.

Rice. 1.16. Destruction of the shaft and wheel of the >MEA solution pump after 12 months of operation.

mylink" data-url="http://chem21.info/info/639601/">chem21.info What pumping stations are used for preparing, pumping and supplying solutions What pumping stations are used for preparing, pumping and supplying solutions A pump for pumping a solution belongs to the category of specialized equipment that is used in construction for mixing the components of the composition in order to prepare a homogeneous mass, as well as for supplying ready mixture of a certain consistency to the required length or vertical distance. This mortar installation is used both on large construction sites and for repair work V small rooms. Such a station is capable of interacting with various concretes, plaster compositions, sand-cement mortars and other different fractions of liquid, semi-dry, dry, viscous, astringent or thick mixtures. Each of the models is capable of moving trains with any amount of solid particles. Unpretentious to operate mortar machines are excellent for working at low temperatures, in hard-to-reach areas without any communications, and can also be placed in an open area and operate during heat, frost or precipitation. When there is no time to postpone construction work due to bad weather, such an installation will be an excellent solution. The design of such a solution preparation machine is simple and easy to use. The installation can perform many, both main and secondary functions. For example, if necessary, a pump is used not only for its intended purpose - to supply a solution, but also to pump out certain liquid building materials. The reliable design of the equipment, as well as the wear-resistant surface of the working parts, allow the machine to work with aggressive substances. What pumps are there for pumping solutions? All machines for supplying solution are divided into several types, depending on the method of driving them, as well as the design features of the working elements. Based on the type of use, such equipment is divided into the following types: Pumps equipped with a laminar type impeller. This unit is best suited for pumping binders into the mortar pump tank. Also, it is used when it is necessary to pump out excess air masses from pipelines. Chemical pumps. This type of device has reinforced parts and is used to interact with active chemical compounds. The machine can easily cope with pumping liquid alkaline solutions or any acids. Centrifugal pumps. This installation will be appropriate for working with mixtures of medium viscosity. Powerful blades allow you to quickly and efficiently pump large quantities of dense compounds. In order to ensure the supply of various mixtures to great heights and a horizontal distance of up to 200 meters, the following units are used: diaphragm-plunger installations; screw (gerotor) pumping stations; pneumatic feeders (pneumatic blowers). Having compact overall dimensions, any feeding unit can operate both on an open construction site and in indoors(in a residential building or production workshop). In addition, these machines perform work economically, efficiently and quickly. Design features of diaphragm-plunger mortar pumps A diaphragm-plunger pump for cement mortar is often used in facilities where plastering work is carried out and a large amount of mortar needs to be supplied. Such machines excel at applying mixtures to vertical surfaces, which makes them convenient to use when carrying out repair and finishing work. The diaphragm-plunger type solution station is capable of supplying mortar at a distance of about 40 meters in height. At the same time, liquid compositions with a fraction of 5 mm can be loaded into its tank. To ensure that thick solutions do not separate, you need to monitor the operating pressure, which should not exceed 25 Atm. It is worth remembering that if water is removed from the composition too quickly, plugs may form in the concrete pipeline. This machine is a highly specialized equipment and is not suitable for pumping some concrete compositions, including: foam concrete and polystyrene concrete mixtures with low or medium density. Operating principle of screw (gerotor) mortar pumps The pumping station for a screw (gerotor) type solution has a design that connects a screw pair in the supply part with a feeding steel auger rotating in a stator (rubber cage), due to which the liquid composition moves. This operating principle allows the mortar pump to be used to work with mixtures that have low density. The screw station for preparing the solution and feeding it, due to its small size and high productivity, allows you to carry out work as quickly as possible and in any areas of the construction site that are difficult to reach for other equipment. The solutions move quite accurately, so this machine can easily cope with foam concrete, polystyrene concrete or plaster composition. Using this installation you can pump required amount mortar for filling voids in walls, applying plaster masses, and also supplying compositions for laying self-leveling floors. The screw mortar pump is universal machine, which is safe to operate, has low cost and is easy to repair in case of failure. Such installations are considered the most reliable option in comparison with their analogues. The only limitation in the use of such pumps is the inability to use the machine when working with solutions whose fractionation is more than 3 mm. In order for the composition to be captured by the screw and transferred in portions through the concrete pipeline, the solution must be sufficiently mobile. Proper Use machine will prevent premature wear of the screw pair. Use of pneumatic feeders (pneumatic superchargers) A pneumatic feeder (or pneumatic supercharger) is the most versatile and multifunctional installation for preparing solutions. Such a machine can perform a huge number of tasks, including both the independent production of any solution and its portion supply over a distance of up to 80 meters vertically. This technique will be especially indispensable when you need to work with semi-dry or dry cement-sand mortars, where the fraction size is about 15 mm. Also, the installation can work with any rigid concrete. This machine performs basic construction tasks and is successfully used in frame house construction, as well as the installation of sliding formwork. The pneumatic feeder is a vessel equipped with a hermetically sealed hatch for loading mixtures, as well as flow control mechanisms air masses, and a pipe for unloading the finished composition. Such a machine has paddle activators, which mix the individual components of the solution and help speed up the flow of the composition. The pressure build-up for unloading building masses can be fully adjusted by the plant operator. Installing a pneumatic chassis allows you to move the machine throughout the construction site. And thanks to its functionality (the ability to produce the mixture on site and, when exposed to pressure, deliver it to the unloading point), the machine was called a pneumatic mixer. Modern construction needs professional equipment that will speed up work processes, mechanizing them as much as possible. Pumping stations will facilitate the work of the construction team and allow the work to be completed faster. In addition, such equipment significantly improves the quality of the final result. The company "Rastvoronasos.ru" offers its customers various models of construction equipment in terms of configuration, price and capabilities. Our employees will help you choose a mortar pump for rent that will perform both primary and auxiliary tasks at your construction site. And the service provided by the company will certainly impress you. Based on materials from the site: http://rastvoronasos.ru fix-builder.ru

With the increasing scale of construction of residential and industrial facilities, the need for new technologies and equipment arises. One of them is a screw pump for supplying cement mortar. Its use on large construction sites increases labor productivity and improves the quality of work performed.

When constructing huge objects, large volumes of liquid cement mortars are used. It is necessary to quickly deliver concrete to the construction site; delays in work have a bad effect on its quality. To do this, use structures in the form of an iron barrel attached to the car. The composition in such a device is homogeneous, without separation. Inside, the mixture is constantly in motion, which ensures the preservation of its technical characteristics.

Delivery to the site occurs using a special loading tray. But for this it is necessary to provide access to the construction site, which is not always feasible. In this case, a screw pump comes to the rescue. Its advantages include the possibility of vertical and horizontal transportation of the solution and easy access to hard-to-reach places.

The concrete pump is mounted on a truck chassis and equipped with a full-rotating boom. Using this technique, it is easy to concrete floors during the construction of multi-story high-rise buildings.

Advantages of concrete pumps

The application has some peculiarities. The main ones:

• Attracting highly qualified concrete workers to work.
• The need to adhere to certain technological requirements.
• High-quality organization of the production process.

For proper operation, a specially prepared mixture is required, taking into account the diameter of the hose and the delivery range.

The use of this equipment is advisable in cases where the supply of solution to the object is difficult or even impossible. For example, when located in cramped conditions or for working with densely reinforced systems. Various types of pumps are suitable for hard-to-reach structures. Stationary, trailed and mobile types are used for transporting liquid concrete.

The mobile auger device is mounted on a truck chassis. Its advantages over other types are greater power, which allows you to supply up to 150 cubic meters of ready-made concrete per hour to the site. This installation is more maneuverable and mobile. It has good performance, which reduces the construction time of objects. The disadvantage is the price; only large construction companies can purchase it. For private developers, the solution may be rent, calculated based on 1 hour of work or delivery of 1 cubic meter.

The concrete pump is capable of silently and continuously delivering a solution of any hardness. The formation of congestion in the hose is eliminated by changing the direction of rotation of the mixer. The main disadvantage is the wear of the pipeline for supplying the mixture. This can be caused by improper use. As the concrete hardens, a blockage forms. In this case, the device should be turned off and the jammed area should be cleared.

1. The supply system must be flushed with water. To do this, install a water pump.
2. Before starting work, check the hydraulic pressure.
3. When laying the pipeline route, a large number of bends should be avoided. Its parts are located at an angle. Placement at right angles should not be allowed.
4. To begin work, the concrete pipeline is wetted lime mortar, forming a kind of lubricant on the walls.

It is unacceptable to take long breaks from work. Even during periods of inactivity, a small amount must be pumped through the pipeline.

Review of popular pump brands

Compact device for supplying liquid mixtures. In construction they are used for transportation concrete mortar, putties, plasters. It operates on electric power and is easy to maintain. It has adjustable engine performance and speed and a reverse mode, which allows you to work with formulations containing solid particles.

Due to its compact dimensions (1x0.5x0.5 m) and low weight (11 kg), it can be used in difficult and cramped conditions. The hopper has a capacity of 25 l, the kit includes a 5 m hose, connecting nozzles and tubes, and a pressure gauge. You can purchase it in most existing online stores of industrial equipment.

2. Screw G10-G85.

For pumping solutions containing solid particles. The installation ensures constant operating pressure without pulsation, which serves as protection for the mixture. Capable of processing from 0.2 to 20 cubic meters per hour.

The horizontal pump is designed to supply fine-grained cement compositions to the site. KSG-705 is a compact multifunctional electrical device with adjustable speed. It is used in construction for pumping water and concrete mixtures, liquid plaster solutions, putties, varnishes and paints.

Used to strengthen and reinforce foundations, stone and brickwork, for applying plaster and putties, and filling voids in structures. The advantages include versatility, mobility, simplicity and ease of use. Weight – 15 kg, the kit includes a 5-meter hose with a GEKA connection, a pressure gauge and nozzles. Hopper capacity – 10 l, maximum length feed – 10 m.

The screw device is used for pumping viscous cement mortars, putties, and adhesive mixtures. This type is used for delivering concrete to a considerable height, when filling cracks in brickwork and applying plaster to walls.

The advantages are:

• removable 30-liter hopper;
• light weight and compact dimensions;
• size of solid pumped particles up to 3 mm;
• equipment screw pump high pressure;
• adjustable feed;
• power supply from household electrical network.

The cost is higher than other analogues due to the materials from which it is made. Steel is used in production, which makes it more reliable in operation and allows major renovation. The stator is made of polyurethane - a material that is considered the most wear-resistant. The rotor is made of stainless steel. For ease of movement around the construction site, the unit has conveniently arranged supports and wheels.