KP Series gear pumps

Pouring volumes of concrete for footings and suspended slabs was always a problem for construction workers. It was during the 1920s when builders decided to try a more efficient way of transporting concrete to high places or where space is limited. Fritz Hell, a German engineer, and his team were constructing a war memorial when the mast carrying the concrete suddenly smashed. Other engineers started developing Hell's design until the mechanical device became popular during 1940s. Workers started using concrete pumps to transfer liquid concrete during construction of high buildings-this became especially helpful after World War II.

Main Parts Of A Concrete Pump

Valves: Concrete pumping equipment can function through hydraulically-powered valves or ball-checked valves. Hydraulic valves are capable of handling different cement mixtures and can pump up to 250 cubic yards of concrete per hour. Ball-checked valves, on the other hand, use balls and mating seats to control cement transfer from the hopper to the cylinder and pipeline. These are ideal for pumping smaller volumes of cements through thinner pipelines.

Cylinders: One cylinder connects to a hopper, while the other dispenses to the pipeline.

Pumps: The first designs were mechanical and have basic functions. Contractors pour cement into the hopper connected to the cylinders through a valve. The valve closes and a piston will push the cement into the pipeline. Hydraulic pumps, however, were later introduced and increased the efficiency of Parker Commercial P Series Gear Pump Manufacturers transferring liquid cement.

Pipeline: The pipeline must be robust and durable. It must also be light so contractors can easily carry it throughout the site. The pipeline consists of two parts: boom hose and discharge hose. The boom hose is made of steel alloy, while the discharge hose is made of lighter and flexible material.

Two Types Of Concrete Pumps

Concrete pumps come in two types: boom truck and line pump. Boom trucks consist of a truck, frame, and the pump itself. These are ideal for pouring cement into slabs and medium high-rise buildings. These vary from single-axle truck mounted pumps, suitable for confined areas. These use a remote-controlled robotic arm, called a boom, to transfer cement accurately. These are suitable for large construction projects because they can pump at high volumes.

Another type of concrete pumping equipment is line pumps. These are also known as truck-mounted pumps because builders mount these on trucks or trailers. These have steel or rubber hoses manually attached to the machine's vent. These also use ball-checked valves. These pumps are ideal for smaller construction projects like swimming pools, sidewalks, and ground slabs because they pump at lower volumes compared to boom trucks. Contractors also use these for grout, wet screeds, mortar, foamed concrete, and sludge.

Hydraulic pump works on principle of converting the mechanical energy and motion into hydraulic fluid power. These are capable of rotating and acting just like a motor. These are usually powered by gas or electricity and also hand and air driven can also be found or utilized. In the fluid power industry there are three main types of KP Dump Truck Gear Pump Factory these machinery used, which are basically the namely vane, gear, and piston pumps. One will find two different kinds which are used in hydraulic drive systems, these are hydrostatic and hydrodynamic. The major differences between the hydrostatic are that these are positive displacement models while hydrodynamic are typically fixed of variable displacements.

These are the usual types which include gear, rotary vane, screw, bent axis, radical piston and axial piston Swashplate principle.

Gear: This type comes with a fixed displacement and external teeth and is suitable for pressures below 3000psi. These are simple to operate, come cheap and are durable. The major cons of a gear model is that it has a limited pressure capability, unbalanced results in large bearing loads, can be noisy and because it is working at a constant displacement, their work is less efficient.

Vane: This type is chiefly driven by an outside engine that rotates at a continuous speed. Similar amount of fluid is pumped with each rotation, which is regardless of how much pressure there is in the system. Its major advantages are reliability and simple operation. One will certainly find an option of variable displacement and this type has a higher pressure capability as compared to the gear type, as it operates in pressures up to 180 bars. Expensive and more complex are the two major disadvantage of this particular type.

Axial Piston: This particular type contains pistons that are arranged in a circular array within a cylinder block, which serves as its housing. It has a variable design and contains the highest volumetric efficiency and pressure capability. These are the two prime advantages of this type. These work well for pressure up to 350 bars. It is more sensitive to oil contamination and is expensive; these are few inconveniences one will encounter with this model.

Radial Piston: The Radial Piston pumps are in disparity with axial piston types. These contain pistons that are arranged in symmetrical and radial direction around a drive shaft. The major benefits of these are highly reliable, works efficiently and are capable to create minimum level of noise. This type operates through pressures around 650 bars. Its bigger radial dimensions and higher cost are few drawbacks of this type.

Buying Guide:

Before selecting any type of hydraulic pump, it is essential to consider few very necessary points like operating pressure, temperature and its frequency. There are less expensive, low-pressure models which are will certainly provide satisfactory solutions to several applications that require minimal pressures (less than 200 psi). This type should not be considered for heavy industrial operations.

Anyone working in the construction industry, dealing with all kids of constructions and concrete structures, knows that concrete pumps are indispensable for certain jobs. Concrete is a sturdy, durable and affordable construction material, therefore it is extensively used. A structure may employ either concrete blocks or poured concrete. Concrete pumps deal with poured concrete.

While it may not sound as complicated, sometimes liquid concrete must be poured in areas that are difficult or nearly impossible to access with cement mixers, for example the top of a building, or the middle of a long tunnel. Concrete pumps are designed to reach these difficult areas, feeding liquid cement from a great distance.

There are two main types of KP Dump Truck Gear Pump Factory concrete pumps: the boom pump and the line pump. Boom pumps are ground based machines of large dimensions, with a crane or boom arm of varying lengths. This crane holds the length of rubberized or plastic tubing, feeding the liquid cement to its destination. This type of concrete pump is especially useful for high constructions with multiple stories, that require poured concrete high above the ground level. The boom pump is generally truck-mounted, with a large open reservoir in which mixed concrete is constantly added. The engine, either gasoline or diesel-powered, protrudes a driveshaft into the cylindrical chamber right at the base of the reservoir. The weight of the cement pushes it into this chamber. The cement is forced through the airtight chamber and up the boom, allowing liquid cement to be poured from a distance.

The line pump is portable, and is recommended for smaller jobs. In a nutshell, line pumps consist of a diesel power engine mounted on the back of a truck or a trailer. A large worm gear at the center of a funnel is controlled by the engine, and at the end of this worm gear a long rubber or plastic tube is attached. With a cement mixer, the cement is poured into the funnel and the turning worm gear pushes it down the tube. Generally, line pumps are used to fill wood or metal forms for certain structures, such as concrete slabs.

Since 1978, the gear pump has been widely applied in the exit zone of the thermoplastic plastics. The most typical fields are plastic material, cast-film and blown film. At present, the gear pump has been the essential equipment in the actual production. As a result, a lot of manufacturers often pack the KP55 Gear Pump For Dump Truck and single screw together for sale.

Why is the gear pump so popular? There are a lot of factors. For example, it is of great help to increase the thruput and improve the quality. Meanwhile, it makes a great contribution to saving the raw material and reducing the energy consumption. To some degree, the payback time of the investment is shortened to six months. When this pump is applied into the processing of the rubber products, the above-mentioned merits will naturally occur in the field.

In order to learn the application of the gear pump in the rubber field more clearly, the following passage will introduce some basic knowledge of this pump in this field. What comes first is its basic structure. This pump is composed of two symmetrical axes. Every axis includes meshing gears and journal bearings. Besides, the whole pump is coated with the shell. The pumping is provided directly through the gears. As for the bearing, it determines the position of the Gear pump axis and at the same time supports the whole axis. The obvious feature of this pump widely used in the rubber field is its integrative design about the gear and axis. When the product's viscosity is relative high, the torque and shear load will become very large and thus the process will be influenced. With the help of this integrative design, the problem can be solved and the whole equipment can bear larger force.

Next, there are some special requirements for the gear pump in the production of the rubber. In this industry, this pump is often widely used in a lot of typical rubber compounds, such as butadiene rubber, nitrile rubber, neoprene, bunas and natural rubber. Owing to the features of these compounds, the pump has to face a great number of challenges in the production. Compared with the thermoplastic plastics, the processing temperature for these rubber compounds is quite low, but they still may suffer from burning or coking. Besides, they also have other burning questions, such as high viscosity, low lubrication and high abradability. In a word, the common gear pump can not satisfy the production requirements of these rubber compounds at all. Therefore, something about the gear pump should be redesigned. For instance, in order to control the temperature there is a coolant mechanism in the pump body and pump axis. The parts which are easily abraded should be coated with the special stiffened material.

Electric fuel pump is used in modern internal combustion engines to supply fuel from the fuel tank to the injectors. The pump should deliver fuel under high pressure, so that the nozzle can spray it into the engine. For the proper engine operation fuel pressure should be within allowed specifications for a given engine. Too low-pressure can lead to "fuel starvation" engine misfire, excessive vibration or stop the engine under load. Too much pressure causes uneven engine running too rich mixture, and excessive pollution.

Electric fuel VQ Series Double Pumps are usually installed in fuel tank (intake), although some can be installed outside. Some cars may be equipped with two pumps (one pump inside the tank and the main pump on the outside). The location of the pump in the fuel tank helps mute the buzzing noise of pump's electric motor. Submersion into the fuel helps lubricate and cool the pump's engine. Driving with fuel tank filled with less than ¼ of its volume can shorten the life of the pump and cause rapid overheating. It also increases risk of pump left without of gas during rapid acceleration or deceleration.

The pump is usually part of a module that also includes a float that carries electrical signals to the level indicator, located on the dashboard. If the fuel pump needs replacing, it can be replaced separately or the complete module assembly (it is expensive, but much easier).

Different electric fuel pumps have different designs. Some older designs used to use forced displacement of the circulation pump chamber. This type of pump can produce very high pressure and constant flow. But at the outlet of the fuel pump has been strong pressure fluctuations, so often in the gas line after the pump was installed damper to reduce the amplitude of pulsation of gas pressure. Circulating chamber can also be installed outside the tank and used with the second low-pressure pump installed in the fuel tank.

There is another type of fuel pump - "rotor-type". This design is similar to design of the oil pump and uses the offset rotor to push the fuel through the pump. Another variation of the roller pump - "vane-type". The blades are used instead of rollers to push the gas through the pump. Most modern cars use a pump turbine. Blades of the impeller push gas through the pump. Turbine type pumps do not produce the pressure fluctuations these types are less complicated to manufacture and more reliable in operation. It is possible to replace a fuel pump by not original unit. In this case fuel pump's output should be within original specifications and as consumption the same as the original one. Use of an improper specs can cause deterioration of performance of the car.

How does electric fuel pump work?

When the ignition, the electronic control unit excites the relay, which supplies voltage to fuel pump, its motor starts to rotate, and within a few seconds it creates necessary gas pressure. Fuel feeds into the inlet pump through a mesh filter to delay the rust and dirt. Outlet of the pump the gas passes through the check valve, single acting (valve maintains a residual pressure in the system, when pump does not work) and feeds to the engine through the fuel line and filter. The fuel filter catches any rust, dirt and other solid contaminants that have passed through the pump to prevent the penetration of these particles in the injectors.

Further, the gas enters the fuel rail, located on the engine and from the rail to each injector. Fuel pressure regulator, located on the ramp, maintains the fuel pressure and throws any excess back to the tank. Start the engine and the electric fuel pump starts to operate continuously and to keep pumping gas until the engine is running. If the engine stops, then the electronic control unit receives a signal from the sensor and the crankshaft ECU will turn off the pump.

A lot of cars (especially Fords) have an inertial emergency switch which disables the fuel pump in the event of an accident. It is envisaged to reduce the risk of fire when the fuel line is damaged. To return the emergency transmitter to its original state - press the reset button on the sensor. On older cars pumps operated at a constant speed. In newer designs pump's speed is being controlled by the electronic control unit in order to precisely match allowed specifications.

Fuel pump failure

The fuel pump can fail for several reasons: - Due to the presence of contaminants inside the fuel tank (dirt or rust); - When driving out of gas; - As a result of overheating (in constant motion with a low level of gas in tank); - Low voltage (problems with electrical wiring); - As a result of overloading (for a clogged fuel filter excessive resistance of the filter element can cause an overload of electric motor pump). The harder the conditions of the fuel pump, the more power is required for its operation. Electric fuel pump often fails without any warning. You may drive your car without a trouble, and within a minute the pump fails, the engine just stalls and the car gets up in the middle of the road. Or in the morning you are going to start the car but the engine just will not start.