A stable dust-proof hydraulic prop

Abstract

The invention relates to a stable dust-proof hydraulic prop, which includes a live post, a post body and a valve nozzle, the live post is connected to the post body, the valve nozzle is installed on the live post, and also includes a dust-proof mechanism and two supporting mechanisms. The supporting mechanism includes a slide bar, a positioning rope, a spring, a moving sleeve, a first connecting rod, a second connecting rod and two third connecting rods, and the dustproof mechanism includes a dustproof cover, a first annular airbag, a second annular airbag, Support pipes, air pipes, limit discs and piston blocks should be placed stably in the dust-proof hydraulic prop, under the support of the support mechanism, the probability of hydraulic prop rolling is reduced, and the stability of hydraulic prop placement is improved. Through the protective effect of the dust-proof mechanism, the probability of dust entering the valve nozzle is reduced, and the failure rate of the hydraulic prop is reduced. Compared with the existing dust-proof mechanism, when the dust-proof cover is removed, the dust-proof mechanism can also The inner wall of the valve orifice is cleaned, reducing the amount of dust entering the interior of the hydraulic strut.

Description

technical field [0001] The invention relates to the field of hydraulic equipment, in particular to a stable dust-proof hydraulic prop. Background technique [0002] The hydraulic prop refers to a single retractable prop that uses liquid pressure to generate working resistance and realize lifting and unloading. The hydraulic prop is mainly divided into suspension type, double telescopic suspension type, DN inner injection type and glass fiber reinforced plastic hydraulic prop. The hydraulic prop is made of It is composed of cylinder, live column, valve and other parts, among which the three-purpose valve is the heart of the external injection hydraulic prop, which is composed of a one-way valve, an unloading valve and a safety valve king. The valve is used for unloading and returning the hydraulic prop to the post, and the safety valve ensures that the hydraulic prop has constant resistance characteristics. [0003] The valve nozzle of the hydraulic prop in the prior art is ...

AI Technical Summary

Problems solved by technology

[0003] The valve nozzle of the hydraulic prop in the prior art is exposed to the air for a long time, so that the coal powder in the coal mine is easy to accumulate inside the valve nozzle. During the liquid injection process of the hydraulic prop, the coal powder is easily washed into the interior of the hydraulic prop. It is easy to cause blockage inside the hydraulic prop. Not only that, the shape of the hydraulic prop in the prior art is cylindrical. When the hydraulic prop is square on the ground with a slope, the hydraulic prop is prone to rolling. If the hydraulic prop collides with other objects , causing the hydraulic prop to be easily damaged

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