A multi-stage anti-shock pillar

Abstract

The invention discloses a multi-stage anti-impact supporting column which comprises a top cover, an energy absorption barrel top cover, hydraulic columns, a multi-stage liquid energy absorption barrel, a trench energy absorption barrel, a hydraulic cylinder top cover, an alloy hydraulic cylinder, a piston, a hydraulic cylinder base, a three-purpose valve and the like, wherein the multi-stage liquid energy absorption barrel is sleeved in the hydraulic columns; the hydraulic columns are sleeved in the prefabricated trench energy absorption barrel; the prefabricated trench energy absorption barrel is sleeved in a light-weight and high-intensity hydraulic cylinder; under a condition of high dynamic load, the multi-stage liquid energy absorption barrel is used for performing quick abdication and energy absorption to prevent the phenomenon that inner elements of the three-purpose valve and column bodies of the hydraulic columns are damaged due to dramatic increasing of pressure in a hydraulic cylinder at the moment of impact and implement quick absorption of the energy which is caused by impact ground pressure and is applied to the supporting column; furthermore, the remote three-purpose valve is used for realizing a function of remotely lifting the supporting column, so that the injuries to people caused by surrounding rock collapse during column falling are avoided, and the safety of workers is guaranteed.

Description

technical field [0001] The invention relates to a mine support equipment, in particular to a multi-stage anti-shock pillar. Background technique [0002] With the increase of coal mine mining depth, the problem of impact rock pressure is becoming more and more serious. At present, the common hydraulic prop used in the roadway often exceeds the strength range of the hydraulic prop due to the strong impact dynamic load generated by the impact of rock pressure. The discharge of the hydraulic prop safety valve The liquid speed and flow are limited, and the hydraulic support cannot give way in time to relieve the pressure, causing the pressure of the hydraulic prop to exceed the acceptable range in a short period of time, resulting in damage phenomena such as column bending, crushing, bursting and fracture, causing damage to the hydraulic support and roadway collapse. , seriously threatening the safety of personnel and slowing down production progress. Contents of the invention...

AI Technical Summary

Problems solved by technology

[0002] With the increase of coal mine mining depth, the problem of impact rock pressure is becoming more and more serious. At present, the common hydraulic prop used in the roadway often exceeds the strength range of the hydraulic prop due to the strong impact dynamic load generated by the impact of rock pressure. The discharge of the hydraulic prop safety valve The liquid speed and flow are limited, and the hydraulic support cannot give way in time to relieve the pressure, causing the pressure of the hydraulic prop to exceed the acceptable range in a short period of time, resulting in damage phenomena such as column bending, crushing, bursting and fracture, causing damage to the hydraulic support and roadway collapse. , which seriously threatens the safety of personnel and slows down production progress

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