Single hydraulic prop

Abstract

The invention discloses a single hydraulic prop comprising a top cover (20), a movable prop (10), a cylinder barrel (9), a base (2), a handle (11), a three-function valve seat (28) and a return spring, wherein the lower end of a cylinder sleeve is connected with a steel wire (5) through the base, a sealing ring (4) is sheathed with the base, the upper end of the cylinder sleeve is fixedly connected with a guiding sealing seat (14) which is internally provided with a sealing ring (15), an anti-extrusion ring (16), a dust-proof ring (18) and two groups of guiding rings (17); the middle-upper part in the cylinder barrel is fixed with a guiding sleeve (12) which is internally provided with two groups of guiding rings (13); the movable prop is sheathed in the cylinder barrel, the lower end of the movable prop is fixedly connected with a limiting ring (3) and the upper end thereof is fixedly connected with an upper end connecting sleeve (19); one end of the return spring is connected with asemicircular support (24) in the connecting sleeve at the upper end of the movable prop, and the other end thereof is connected with the base by a spring pressure plate (6) and a rubber pad (1) whichare fixed on the base; and the top cover is sheathed with the connecting sleeve at the upper end of the movable prop by being connected with a steel wire (23) and a sealing ring (22).

Description

technical field [0001] The invention relates to a support equipment for mines, in particular to a single hydraulic prop. Background technique [0002] As we all know, the single hydraulic prop is generally composed of a top cover, a cylinder liner, a live column, a handle body, a base, a return spring, etc. Since it is mainly used for underground support in coal mines, its working environment is poor and its stress is complicated. , there is often the problem of partial load and wear of the pillar due to the eccentric load, and even the pillar is damaged in severe cases. At the same time, because the original return spring generally adopts the structure that the extension parts of the two ends of the spring itself are made into hooks, one end is hooked on the base, and the other end is hooked on the top cover, so that the effective number of working turns of the spring is greatly reduced. The reduction of the number of working turns makes the hook part of the spring easy to...

AI Technical Summary

Problems solved by technology

[0002] As we all know, a single hydraulic prop is generally composed of a top cover, a cylinder liner, a live column, a handle body, a base, a return spring, etc. Since it is mainly used for underground support in coal mines, its working environment is poor and its stress is complicated. , there is often the problem of partial load and wear of the pillar due to the eccentric load, and even the pillar is damaged in severe cases

At the same time, because the structure generally adopted by the original return spring is that the extended parts of the two ends of the spring itself are made into hooks, one end is hooked on the base, and the other end is hooked on the top cover, so that the number of effective working turns of the spring is greatly reduced. The reduction of the number of working turns makes the hook part of the spring easy to break, or the spring is straightened and loses the function of the spring, and the disassembly of the return spring is extremely inconvenient, and special tools are required for disassembly and assembly, and accidents are extremely likely to occur.

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