Single hydraulic prop with good supporting effect and dustproof function of valve nozzles

Abstract

The invention relates to a single hydraulic prop with a good supporting effect and a dustproof function of valve nozzles. The single hydraulic prop comprises a prop body, a movable column and the twovalve nozzles, and further comprises a supporting mechanism and two dustproof mechanisms, wherein each dustproof mechanism comprises a sliding rod, a moving sleeve, a spring, a dustproof block and anair bag, the supporting mechanism comprises a bottom plate and at least two supporting assemblies, each supporting assembly comprises a guide rail, a lifting sleeve, a fixing unit, a transmission rod,a rotating rod and a supporting plate, and each fixing unit comprises a supporting sleeve, a lead screw and a rotating wheel. The single hydraulic prop with the good supporting effect and the dustproof function of the valve nozzles has the advantages that the dustproof mechanisms play a role in protecting the valve nozzles to reduce the probability that the dust enters valve nozzles and improve the cleanliness of the valve nozzles, and the supporting mechanism makes point contact between the hydraulic prop and the ground changed into the surface contact to reduce the pressure of the hydraulicprop on the ground, reduce the probability that the hydraulic prop sinks into the ground and improve the supporting effect of the hydraulic prop.

Description

technical field [0001] The invention relates to the field of coal mine production equipment, in particular to a single hydraulic prop with a valve nozzle dustproof function and good supporting effect. Background technique [0002] Single hydraulic prop refers to a single retractable prop that uses liquid pressure to generate working resistance and realize lifting and unloading. Single hydraulic prop is mainly divided into suspension type, double telescopic suspension type, DN inner injection type and glass fiber reinforced plastic single hydraulic prop. The pillar, the single hydraulic prop is composed of cylinder, live column, valve and other parts, among which the three-purpose valve is the heart of the external injection single hydraulic prop, which is composed of a one-way valve, an unloading valve and a safety valve king. The steering valve is used for liquid supply of the single hydraulic prop, the unloading valve is used for unloading and returning the single hydrauli...

AI Technical Summary

Problems solved by technology

[0003] The valve nozzle of the single 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, and the coal powder is easily washed into the single hydraulic prop during the liquid injection process of the single hydraulic prop. The interior of the prop, over time, is likely to cause blockage inside the single hydraulic prop. Not only that, the single hydraulic prop in the prior art is in point contact with the ground, so the pressure generated by the single hydraulic prop on the ground is relatively large, which is easy to cause The single hydraulic prop sinks into the ground, reducing the supporting effect of the single hydraulic prop

Images