Reciprocating hydraulic drive

Abstract

The invention discloses a reciprocating hydraulic driving device which comprises a hydraulic cylinder block, a hydraulic piston and a piston rod with one end located in the hydraulic cylinder block to be connected with the hydraulic piston and the other end stretching out of the hydraulic cylinder block. The hydraulic cylinder block is provided with a first oil injection orifice and a second oil injection orifice. The hydraulic piston is arranged between the two oil injection orifices and partitions the hydraulic cylinder block into a first oil injection cavity and a second oil injection cavity. The hydraulic driving device further comprises a flow distribution mechanism which comprises a flow distribution block and a driving mechanism. The flow distribution block is arranged in the first oil injection cavity and can reciprocate axially, and the driving mechanism is matched with the piston rod for driving the flow distribution block. The reciprocating hydraulic driving device is simple in structure, small in number of faults, convenient to maintain, low in weight, small in size and convenient to hold manually and move during operation in underground coal mines; and the problems that an existing pneumatic reciprocating hydraulic driving device and the like in the prior art are complex in overall system, high in fault rate, high in weight, inconvenient to move in a coal mine and the like can be solved.

Description

technical field [0001] The invention relates to the field of drilling and sealing grouting pumps in coal mines, in particular to a reciprocating hydraulic drive device. Background technique [0002] Construction drilling is a necessary method for proving geological structure, coal seam occurrence, and solving disasters such as mine gas, water, roof and floor. And for the grouting sealing of borehole also is indispensable step, at present, mine is pneumatic grouting pump for the equipment commonly used for the grouting sealing of borehole. The pneumatic grouting pump mainly uses the compressed air in the well to push the cylinder piston to reciprocate in the cylinder, and the cylinder piston drives the grouting piston to reciprocate to realize the grout suction and grouting action. However, the existing pneumatic grouting pumps will limit the grouting pressure when the compressed air power in the well is insufficient, so it is often necessary to separately equip compression ...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a reciprocating hydraulic drive device, which can be used for hydraulic grouting pumps for hole sealing or other devices that require hydraulic drive functions. It has a simple structure, low cost, low failure rate, and is easy to maintain; It is small in size, convenient for manual support, and easy to move in coal mines; it can solve the problems of existing technologies such as pneumatic grouting pumps and reciprocating hydraulic drive devices, such as overall system complexity, high failure rate, bulky body, and inconvenience in moving underground And other issues

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