Grout pumps are specialized construction and industrial equipment, intended for preparation, mixing and subsequent feeding of mixtures of various consistencies. Most often they can be found on construction sites, where they are used for mixing plaster solutions, 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 Purpose and requirements can be found 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 over a wide temperature range, such as environment, 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-type impeller can be used in the food industry, and centrifugal pumps where there is a need for pumping various types 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, they 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 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 a large amount of sandy sediments good result shows a submersible unit, for example, an octopus pump;
• 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 would be using a screw pump to cement mortars aspro g700. 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. Used for dosed delivery 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, the 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 environments.
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 flows 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 a 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 summer cottages, cottages and country housing. 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. The high efficiency of the unit is due to 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. This wide application 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 exact amount 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. Well pumps SPRUT. 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 of the units when working with any environment.

nasosovnet.ru

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 Oh. 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 cementing liquids (including liquid cement), paint and varnish solutions at high temperature, 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 mixing containers building materials and pumping air from pipelines;
• Chemical pumps for transferring construction liquid solutions. Active chemicals that can corrode 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 aqueous solution methanol -5 - intermediate tank of regenerated methanol pump for original gasoline I 2 - pump for purified gasoline H-5 - pump for caustic soda solution H-4 - pump for water H-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 The 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 The diaphragm plunger pump for cement slurry is often used in facilities where plastering work and it is necessary to supply a large amount of the composition. Such machines do an excellent job of applying mixtures to vertical surfaces, which makes them convenient to use when carrying out repair and finishing work. The diaphragm-plunger type mortar station is capable of delivering mortar to 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 car is a highly specialized technique and is not suitable for pumping certain concrete compositions, including: foam concrete and polystyrene concrete mixtures with low or medium density. Operating principle of screw (gerotor) mortar pumps A pumping station for a screw (gerotor) type solution has a design that connects a screw pair in the supply part with a feeding steel screw rotating in a stator (rubber cage), due to which the movement occurs liquid composition. 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, thanks 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 access 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, apply plaster masses, as well as supplying compositions for laying self-leveling floors. The screw mortar pump is a universal machine that is safe to operate, has a 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 of the machine will prevent premature wear. 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 mechanisms for controlling the flow of 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 make work easier construction crew and will allow you to complete the work 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 solution pump for rent that will perform both main and auxiliary tasks on your site. 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

It depends on the size of the site (distance and height of transportation), on the size of the individual sections to be concreted (productivity) and on the properties of the concrete being laid (cement content, consistency, grain size, etc.). A concrete pump, which is required to deliver a certain amount of concrete in a given time, must have a design that guarantees the collection of a given amount of concrete and its transportation to the place of placement. The longer the transport pipeline and the faster the concrete flows through it, the greater the supply pressure. It is easy to understand that the driving power of the pump that develops high pressure for transporting concrete to long distance, will be greater than that of a plant transporting concrete only over short distances. Only pumps with the same drive power can be compared with each other.

Suction

Concrete can only be squeezed out of the pump cylinder if it has previously been filled with concrete. This filling also requires pressure. Atmospheric pressure (1 bar = 760 torr) forces the concrete into the tank, which is under low pressure. The suction piston creates a reduced pressure in the cylinder. Atmosphere pressure“squeezes” concrete out of the hopper into the cylinder. The pressure difference between atmosphere and vacuum theoretically cannot be more than 1 bar. In the pump it is at favorable conditions may be 0.8 bar. This means that the concrete is fed from the hopper into the cylinder with a maximum of 0.8 bar. Therefore, hard and coarse concrete mixtures are sucked in worse than thin and plastic ones. Optimal suction conditions are ensured when the suction openings have the same cross-section as the pump cylinder. The valve (gate) must be designed in such a way that the suction section remains as open as possible, without impeding the flow of concrete or changing its direction of movement. Large volumes of concrete require larger cylinders and appropriately sized suction openings. The diameters of the suction port and cylinder are determined by maximum size grains of transported concrete. The simplest rule requires that the diameter of the suction channel be at least 3 times the diameter of the largest grain. That is, concrete with a maximum grain size of 63 mm requires a concrete pump with a feed cylinder diameter of at least 180 mm.

Mixer

Modern concrete pumps are equipped with mixers installed in bunkers. The mixer is designed to maintain concrete in a fluid state while the pump is idle, it prevents the concrete from settling and destroys structures formed near the suction openings. However, these mixers are not full-fledged concrete mixers. When the pump is turned off and mixing times are long, preparing concrete using a mixer is very problematic.

Pressure

The maximum pressure provided by a concrete pump is determined by its design. For various conditions Various devices have been developed for use. Truck-mounted concrete pumps usually operate with short concrete pipes corresponding to the length of the concrete distributor mast. They require a lower discharge pressure compared, for example, with stationary pumps on construction sites, which must deliver the same volume of concrete to a height of 100 m. For mobile concrete pumps (concrete pumps), as a rule, discharge pressures of up to 70 bar are sufficient, including and at high productivity. Stationary concrete pumps delivering concrete over distances of up to 1000 m or heights of up to 500 m require pressures of up to 200 bar. Such pressures place increased structural demands on all components operating under pressure, such as gate valves, hoses, gearboxes, pipelines, etc. Uninterrupted operation of the pump is only possible if all the specific requirements of a particular construction site are taken into account when selecting it. An installation that is constantly overloaded cannot operate efficiently.

Concrete pump model	Productivity, m 3 /hour	Supply pressure, bar	Feeding range up/horizontally, m	Appearance
Piston stationary concrete pumps
	18	70	60/200
	71/47	71/106	100/250
	65/42	56/101	100/250
	95/57	91/152	130/350
Stationary concrete pump Putzmeister BSA 2109 HP D - rent	95/57	91/152	150/400
Stationary concrete pump Schwing SP 4800 D - rent	43-81	104-243	150/400
	102/70	150/220	180/400
Stationary concrete pump Schwing SP 8800 D - rent	63-116	104-243	300/800
Stationary concrete pump Putzmeister 14000 HP D - rent	102/70	150/220	350/1000
Pneumatic stationary concrete pumps
Concrete pump Putzmeister M 42 - rent Mercedes chassis	120	85/95
Concrete pump Schwing SX 52 - rent Mercedes chassis	160	85
Truck concrete pump CIFA K52L XRZ	150	80

With the increasing scale of construction of residential and industrial facilities there is a need for new technologies and equipment. 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 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 its safety 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. Pumps are suitable for hard-to-reach structures various types. 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; it can only be purchased by large construction companies. 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 out the pipeline route, you should avoid large quantity bends. Its parts are located at an angle. Placement at right angles should not be allowed.
4. To begin work, the concrete pipeline is moistened with lime mortar, which forms 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 when transporting concrete mortar, putties, and plasters. Powered by electrical supply 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 materials to the facility cement compositions. 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, 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;
• equipped with a high pressure screw pump;
• 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.

One of the most progressive methods of supplying concrete to the pouring site and uniform distribution is the use of concrete pumps. This method significantly improves productivity and quality concrete works, but due to the fact that the concrete pump is complex and expensive equipment, it is not always used. You will learn about the methods of application and types of equipment from our article.

Features of the use of concrete pumps

Participation of such equipment in construction work entails:

• Using the labor of highly qualified concrete workers and mechanics.
• High organization of work.
• Strict adherence to all technological requirements.
• The use of special concrete mixture compositions, taking into account:
  • Concrete pipe diameter.
  • Conditions and range of supply of the mixture in the structure.

Based on the above, it is advisable to use a pump for pumping concrete when supplying the mixture by other means is difficult or impossible, as in the case of:

• Concreting structures located in cramped conditions.
• Internal or densely reinforced structures.

Note!
Of course, no one has the right to prohibit the supply of solution in any conditions; it all depends on your budget.

Types of concrete pumps

For concreting structures, depending on the working conditions and purpose, various types of concrete pumping units are used:

• Stationary is a piston installation located on a frame with wheels. As a rule, such equipment is installed for a long period of time and is used in the construction of high-rise buildings. If necessary, it is moved further to the desired location for pumping the mixture. The installation is powered by a diesel or gasoline engine.
  Stationary pumping unit capable of:

• Pour concrete to a height of more than four meters.
• Feed speed up to ninety cubic meters per hour (depending on the technical characteristics of the unit).

The advantages of stationary installations include:

• Small dimensions.
• No big requirements for the installation site.
• Low price (up to 3,000,000 rubles). Renting such a concrete pump will cost 250,000 rubles per month.

• Trailed - a mobile unit that does not stand out in terms of power, but fits into almost any area and is easy to transport.

• Mobile. Such installations are mounted on the frame of a truck.
  The advantages of automobile concrete pumps include:
  • High power (up to one hundred and fifty cubic meters per hour).
  • Mobility.
  • High productivity, ensuring reduction of construction time.

The only drawback of this type of equipment is its price. Only the largest construction companies can afford to purchase such a machine. A concrete pump based on a MAN truck costs more than 12,500,000 rubles.

The Korean version based on DAEWOO will cost a little less - up to 10,000,000 rubles. But anyway, as you can see, such equipment is not available to a private developer.

Advice!
A solution for organizations that cannot afford such equipment may be to rent it for a short time.
Renting a car pump, depending on the power and rental time or volume of concrete, costs from 2500 rubles per hour, or from 200 rubles per cubic meter.

• The most common mobile installations are on the go. They are equipped with movable booms of three or four links that fold in a horizontal or vertical plane.
• It is advisable to perform it with a compensation device in the vertical section of the concrete pipeline. This makes it easier to regulate smooth changes in the length of the pipeline when lifting the formwork.

For your information!
The compensation device consists of a combination of straight inserts and elbows, which are combined by locking hinge joints.

• In conditions of very low temperatures, only heated concrete mixture is used to a temperature not exceeding twenty-five degrees. This measure is necessary to avoid: firstly, premature thickening of the concrete mixture; secondly, loss of mobility, and thirdly, ease of pumping.

Important!
Concrete pipelines in such conditions must be insulated and pre-heated with steam before starting work, with the obligatory removal of the resulting condensate to the outside.

Types of concrete pump designs

Among concrete pumps, two main types of design can be distinguished:

• Gerotor pump for concrete.
• Piston pump.

Screw pumps

Gerotor (screw pumps for concrete) equipment is capable of ensuring an even supply of concrete of any hardness. They are characterized by low engine noise.

Possible concrete blockages in the concrete pipeline are eliminated by reverse operation of the engine.

• The main disadvantage of such equipment is the rapid wear of the reinforced hose.
• The advantage is the relatively inexpensive cost of repairs, since replacing spare parts does not require the involvement of highly qualified personnel.

Such equipment has:

• Long service life.
• High performance.

Piston pumps

A distinctive feature of modern piston equipment is:

• Supply of concrete mixture to a height ranging from five to sixty-five meters.
• Productivity under normal conditions is up to one hundred and eighty cubic meters per hour.

The disadvantage is that it is more susceptible to wear and tear, which will affect your budget or the budget of the construction organization.

There are craftsmen for whom it is not a problem to design and assemble a concrete pump with their own hands. But this is far from a five-minute task and requires special skills and abilities. Although if you have such a desire and strength, as well as detailed instructions– then everything is possible! And the incentive for your idea will be the final cost of a homemade concrete pump (within 60,000 rubles).

Transporting concrete

To prepare the concrete mixture on the way to the construction site, a concrete mixer truck with a pump is used. A concrete mixer with a pump is attached to the base of the vehicle, which supplies the ingredients of the concrete mixture directly into a continuously rotating drum during transportation to the building site.

To supply the concrete mixture from the mixer to the place where structures are concreted, the concrete mixer with a pump is equipped with a tray loading and loading device.

Such automatic mixers are capable of preparing and delivering a solution in a volume of five to nine cubic meters. As a rule, they are located on the basis of ZIL, Ural, KamAZ, MAZ, KrAZ and MZKT vehicles, which are designed for various loads and operate in any road conditions.

It is advisable to purchase concrete mixer trucks with a pump for companies specializing in:

• On sale of concrete.
• Providing concrete delivery services.

Only large construction organizations engaged in large-scale construction on an ongoing basis can afford to own such a concrete mixer. Only in this case will the equipment’s return on investment be high.

Even if you take into account depreciation charges for the maintenance of such equipment with its constant standard load, within a year you will recoup the funds spent on its purchase.

The operation of concrete mixer trucks with a pump for the device is especially cost-effective road surfaces, construction of agricultural complexes and other development sites remote from the concrete supplier.

Conclusion

Now you know the price of the pump that in the future you will purchase for your fleet, which, you see, is very cost-effective in conditions of increased demand for construction country houses. The main thing is not to make a mistake when choosing an equipment manufacturer and to monitor the condition of the equipment.

In the videos presented in this article you will find Additional information on this topic.