Combined multi-way reversing valve for coal mine full hydraulic tunnel drilling rig

Abstract

The invention discloses a combined-type multi-way reversing valve for a coal-mine full-hydraulic underground drilling machine. The combined-type multi-way reversing valve consists of an oil feeding valve body, a motor direction control valve body, a motor rotating-speed control valve body, an auxiliary control valve body, an oil cylinder direction and speed control valve body, a hydraulic chuck control valve body, a gripper control valve body and a hydraulic chuck oil return valve body which are communicated in sequence. The combined-type multi-way reversing valve has the advantages that since the original hydraulic oil pipe is replaced by an oil path block, the oil path is shortened, and leaking points possibly existing on the oil path are reduced; all the valve bodies are integrated into one valve block, the structure is more compact, the stroke of hydraulic oil is short, the pressure and power loss is less, the micro-motion performance is good, and the accuracy is high, the system efficiency is high; and all hydraulic elements are arranged orderly, concentrated control is easy to implement, the operation is convenient, and the reliability of a main machine is good.

Description

technical field [0001] The invention belongs to a hydraulic valve, in particular to a combined multi-way reversing valve for a coal mine full hydraulic tunnel drilling machine. Background technique [0002] At present, the fully hydraulic tunnel drilling rigs used in coal mines are developing in the direction of high precision and centralized control. The multi-way reversing valve that existing fully hydraulic tunnel drilling rig for coal mine adopts is made of multiple reversing valves, auxiliary valves and hydraulic oil pipes communicating with each reversing valves and auxiliary valves. This kind of multi-way reversing valve has a loose structure, poor micro-movement performance, and low sensitivity; there are many leakage points, large pressure loss, serious power loss, and low system efficiency; the hydraulic oil pipes are messy, difficult to operate, and it is difficult to achieve centralized control, which affects the main engine. reliability. Contents of the inven...

AI Technical Summary

Problems solved by technology

This kind of multi-way reversing valve has a loose structure, poor fretting performance, and low sensitivity; there are many leakage points, large pressure loss, serious power loss, and low system efficiency; the hydraulic oil pipes are messy, difficult to operate, and it is difficult to achieve centralized control, which affects the main engine. reliability

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