Chain suspension type hydraulic support

Abstract

The invention discloses a chain-suspended hydraulic support for supporting the roof of an underground working face in a coal mine, comprising an integral roof beam (1), a hydraulic prop (8) vertically downward from the roof beam (1), and a front extension beam And the front extension beam oil cylinder (5), the upper gangue-stopping device (9) hinged on the top beam (1) rear end, and the lower gangue-stopping device (25) connected together with the rear row hydraulic props (8), are characterized in that It can slide along the side of the integral top beam 1, and at least one chain or wire rope is connected with the sliding parts (13) and (23) connected with the frame moving cylinder, and the other end of the chain or wire rope is connected with the adjacent hydraulic pressure. bracket connection. The chain-suspended hydraulic supports are densely arranged horizontally in a row when the working face is used, and the unloaded support is suspended by the chain (16) when the frame is moved, and moves forward under the promotion of the frame-moving cylinder (12). By controlling the expansion and contraction of the frame-moving cylinders (12) on both sides of each roof beam, the frame can be moved effortlessly and quickly and the direction in which the support is pushed forward can be controlled, especially for uneven roofs.

Description

technical field [0001] The invention relates to a light-duty top-beam type hydraulic support used for supporting the roof of an underground coal mining face in a coal mine. Background technique [0002] Hydraulic supports are divided into two categories: fully mechanized mining supports and sliding top beam hydraulic supports. The present invention is a top beam hydraulic support between the two. Its background technology is the technology described in the "General Technical Specifications for Sliding Roof Beam Hydraulic Support" of China's coal industry. Existing technology in this field has suspension top beam hydraulic support (Chinese patent application number 88104291.9); Trident hydraulic support (Chinese patent application number 96209441.2); Side-by-side sliding top beam hydraulic support (Chinese patent application number 91200747.8) Wait. Above-mentioned these supports all are made up of parts such as hydraulic strut, front extension beam, frame shifting cylinder...

AI Technical Summary

Problems solved by technology

This kind of bracket can adjust the forward direction of the top beam by manpower through the lever, and the safety is also improved when adjusting the frame. However, because the direction is adjusted by manpower, the labor intensity is high, and sometimes it cannot be adjusted, so lifting tools such as lifting chains have to be used. Pulling the top beam will take up production time and affect the output. In addition, the top coal must be tied to the top net when using this support.

There is also a hydraulic support that adopts an integral top beam, such as a lift-type hydraulic support (Chinese Patent Application No. 97100626.1), etc. The top beam of this type of hydraulic support is relatively wide, and the empty top area is small, so it can be untied like a fully mechanized mining support. The top coal is placed on the top net, but because the top beam of this type of support has a certain connection relationship with the lifting beam that runs through the entire working face below, it limits the range of a certain top beam alone, so the adaptability to uneven roofs poor

In addition, due to the limitation of the lifting beam, the direction of this kind of support cannot be controlled by hydraulic force, so every time a certain distance is advanced, the direction of the support and the distance between the supports need to be specially adjusted, which affects the output

[0003] Of course, the fully-mechanized mining support can be used without tying the roof net to lay the top coal, but the fully-mechanized mining support weighs more than ten tons, is expensive, has strict requirements on geological conditions, and is inconvenient to transport underground. It cannot be used in general coal mines, especially the fully-mechanized mining support. Can be used for machine mining, but not for gun mining, so the promotion and application are limited

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