Stable type hydraulic prop with dust-proof function for coal mine support

Abstract

The invention relates to a stable type hydraulic prop with a dust-proof function for coal mine support. The stable type hydraulic prop with the dust-proof function for the coal mine support comprisesa movable pillar and a hydraulic cylinder, and further comprises a dust-proof mechanism and a reinforcement mechanism, wherein the reinforcement mechanism comprises a transmission casing pipe, a bottom plate, four supporting assemblies and two first drive assemblies; and the dust-proof mechanism comprises a lifting casing pipe, a top plate, a dust-proof curtain, a limiting ring, an annular grooveand two second drive assemblies. In the stable type hydraulic prop with the dust-proof function for the coal mine support, the movable pillar is covered by the dust-proof mechanism, so that the accumulation of dust on the movable pillar is reduced, the smoothness of the movable pillar return is improved, and the failure rate of the hydraulic prop is lowered; and under the action of the reinforcement mechanism, the contact area between the hydraulic prop and the ground is enlarged, the pressure on the ground caused by the hydraulic prop is reduced, the stability of the hydraulic prop is improved, the probability of ground subsidence is further reduced, and the practicability of the hydraulic prop is improved.

Description

technical field [0001] The invention relates to the field of coal mine mining equipment, in particular to a stable hydraulic prop with dustproof function used for coal mine support. 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 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 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. It is used for liquid supply of the single hydraulic prop, and the unloading valve is used for unloading and returning the single hydraulic prop to the post. The safety valve ensur...

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Problems solved by technology

[0003] As a kind of slotting equipment in coal mines, hydraulic props have greatly improved the safety of coal mining. At present, for the geological adjustment of some soft rock floors, it is difficult to support single hydraulic props stably, causing the hydraulic props to sink and fail to work. Not only that, but the environment inside the coal mine is relatively harsh. When the live column of the hydraulic prop is raised, dust adheres to the live column. When the dust accumulates to a certain amount, it is easy to cause the live column to return slowly. It even causes the live column not to return to the column, which shortens the service life of the live column

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