Chain suspension type hydraulic support

Abstract

The invention relates to a chain suspension hydraulic support for supporting the top plate of working surface under the coal well. Wherein, it comprises an integrated top beam 1, a hydraulic support post 8 downward vertical to the top beam 1, a forward beam and forward beam cylinder 5, an upper baffle device 9 hinged at the back of top beam 1, and a lower baffle device 25 connected with the back hydraulic support post 8. The invention is characterized in that; it can slide along the side edge of top beam 1 and is connected to at least one flexible element as chain or steel line of the slide elements 13 and 23 that connected with moving cylinder; another end of said flexible element is connected to nearby hydraulic support; the inventive chain suspension hydraulic support can be arranged in one transverse row, while moving it, using flexible element 16 to suspend the discharge support, to move it pushed by moving cylinder 12; and via controlling the flexibility of moving cylinder 12, said support can be moved with lower force.

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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