EN
A concrete pump is a machine that uses pressure to continuously transport concrete along a pipeline. It consists of a pump body and a delivery pipe. According to the structural form, it is divided into piston type, Squeeze type, and hydraulic diaphragm type.
There are hydraulic transmission types and mechanical transmission types. The hydraulically driven concrete pump consists of a hopper, hydraulic cylinder, and piston, concrete cylinder, distribution valve, S pipe, flushing equipment, hydraulic system, and power system. The hydraulic system uses pressure to push the piston into a reciprocating motion. When the piston moves backward, it absorbs material, and when it pushes forward, it presses the concrete in the concrete cylinder into the delivery pipe through the S tube. After pumping concrete, clean the pump body and delivery pipe with high-pressure water or compressed air. The displacement of a piston concrete pump depends on the number and diameter of the concrete cylinders, the reciprocating speed of the piston, and the volumetric efficiency of the concrete cylinder suction.
The main manufacturers in China are:
Zoomlion, Changsha, Hunan
Changsha Keqiang, Changsha, Hunan
Sany Heavy Industry, Changsha, Hunan
Hengyuan Concrete Machine, Zhengzhou, Henan
Jinzhu Machinery, Weihai, Shandong
There are three types: rotor type double roller type, straight tube type three roller type, and belt type double groove type. The rotor-type double roller concrete pump consists of a hopper, pump body, extrusion hose, vacuum system, and power system. The pump body is sealed. The rotor frame in the pump body is equipped with two planetary rollers. The inner wall of the pump body is lined with a rubber backing plate, and an extrusion hose is installed around the inner circumference of the backing plate. The power unit drives the planetary roller to rotate, crush, and squeeze the hose, and squeeze the concrete in the pipe into the delivery pipe for discharge. The vacuum system maintains a certain degree of vacuum in the pump body, prompting the extrusion hose to return to its original state immediately after being rolled, and causing the concrete in the hopper to be sucked into the extrusion hose faster. The displacement of an extrusion concrete pump depends on the radius and speed of rotation of the rotor, the diameter of the extrusion hose, and the volumetric efficiency of concrete suction.
It consists of hopper, pump body, diaphragm, control valve, water pump and water tank. The diaphragm is in the pump body. When the water pump pumps the water under the diaphragm back to the water tank through the control valve, the diaphragm sinks, and the concrete in the hopper opens the one-way valve and enters the pump body; when the water pump pumps the water in the water tank back to the pump body through the control valve At this time, the pressurized water raises the diaphragm, closes the one-way valve, and presses the concrete into the delivery pipe for discharge.
The concrete pump has high productivity and can complete the horizontal and vertical transportation of concrete at one time. However, it has certain requirements for the concrete mix ratio, particle size and gradation of coarse and fine aggregates, cement dosage, and concrete slump to ensure good pumping. efficacy.
