A hydraulically driven high-pressure grouting pump

Abstract

The invention discloses a hydraulic-driven high-pressure grouting pump. The pump is provided with an oil inlet P, an oil return port T, a slurry inlet V and a high-pressure slurry outlet H, and comprises a pressurization cylinder and a hydraulic control reversing valve assembly; the pressurization cylinder comprises a low-pressure cylinder, a low-pressure piston, a left high-pressure plunger, a right high-pressure plunger, a left high-pressure cylinder and a right high-pressure cylinder, wherein the low-pressure cylinder is provided with a first oil inlet flow channel, a second oil inlet flowchannel, a first control flow channel and a second control flow channel, and an annular communication groove is formed in the low-pressure piston; when the low-pressure piston moves leftwards to the position where the low-pressure piston covers a first through-flow groove completely, the communication groove is used for communicating the first oil inlet flow channel with the first control flow channel to control reversing of the hydraulic control reversing valve assembly, and the low-pressure piston is braked through a closed left piston cavity; and when the low-pressure piston moves rightwards to the position where the low-pressure piston covers the second through-flow groove completely, the communication groove is used for communicating the second oil inlet flow channel with the second control flow channel to control reversing of the hydraulic control reversing valve assembly, and the low-pressure piston is braked through a closed right piston cavity. The high-pressure grouting pumpis simple in structure, electric control is not needed, and the low noise is achieved.

Description

technical field [0001] The invention relates to the technical field of grouting pumps, in particular to a hydraulically driven high-pressure grouting pump. Background technique [0002] At present, in the basic construction projects of mines, shafts and tunnels, various types of foundations, foundation pit reinforcement and slope protection construction of geotechnical engineering, reinforcement of various types of underground excavation tunnels and prevention of water, buildings and structures Settlement and Constructions such as inclined directional elevation and deviation correction are all carried out by grouting pumps to realize grouting, water blocking and backfilling, which not only improves the construction speed, but also improves the construction quality. However, the grouting pumps used in the past mostly adopt the crank connecting rod structure, and the grouting pumps with this structure are complicated in structure, large in volume and high in cost. [0003] In...

AI Technical Summary

Problems solved by technology

Hydraulic grouting pumps are widely used in underground water blocking and reinforcement in coal mines. However, for the special environment of coal mines, due to safety considerations, solenoid valves are not suitable for reversing oil cylinders. At present, manual reversing valves are basically used to transform them into machine-controlled valves. A complex linkage mechanism is required, and because the hydraulic cylinder needs to move the mechanical control valve back and forth, the failure rate is high, the noise is large, and the service life is short

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