Top beam of hydraulic support

Abstract

The invention discloses a top beam of a hydraulic support, which is used for a coal mining face under a coal mime shaft. The top beam comprises an auxiliary top beam body 2, a main top beam body 3, a front beam lifting jack 10, a needling 21, a connecting device and an articulated hole 15, wherein the front beam lifting jack 10 is articulated between the auxiliary top beam body 2 and the main top beam body 3; the needling 21 is used for installing the hydraulic support; the connecting device is used for installing a front extension beam 1; and the articulated hole 15 is used for installing a shielding beam or a rock retaining device 4. As the auxiliary top beam body 22 can float up and down relative to the main top beam body 3, the top filing is good; as the front beam lifting jack is arranged in the top and bottom direction, few passing space can be occupied; and the auxiliary top beam body 2 and the main top beam body 3 adopt inlaid structures so that the supporting resistance of the auxiliary top beam body 2 can be increased. The top beam disclosed by the invention is particularly suitable for being used in a working surface of an uneven top plate.

Description

technical field [0001] The invention relates to a top beam of a hydraulic support used for supporting a top plate in an underground coal mining working face of a coal mine. Background technique [0002] Hydraulic supports are divided into two categories: fully mechanized mining supports and sliding supports. The background technology of the present invention includes the top beams in these two types of hydraulic supports. In order to overcome the shortcomings of the above two types of supports, the applicant once designed a chain suspension hydraulic support (Chinese patent application number ZL200520019152.2). It is integral, so when the uneven roof is supported, the bending moment on the top beam is relatively large, so when the support resistance is large, the top beam is heavy. In addition, the top performance is not good. [0003] The top beam of the fully mechanized mining support has three types: integral type, hinged type and wedge-shaped structure. (see Wang Guof...

AI Technical Summary

Problems solved by technology

The roof connection performance of the wedge-shaped roof beam has been improved, but the roof beam of the wedge-shaped roof beam uses the principle of self-locking friction between components, so it cannot be supported by constant resistance

The articulated top beam can achieve constant resistance support, but because the front beam jack is horizontally arranged below the top beam near the hinge point, two problems arise: one problem is the vertical line between the hinge point and the center line of the front beam jack The distance is too close, so the front beam jack must have enough support and connection strength

The second problem is that the front beam jack is horizontally arranged under the top beam, which affects the passage space of the unit and pedestrians. In order to solve this problem, the front beam jack needs to be moved upwards

Since the solutions to these two problems are contradictory, they have not been better resolved for decades.

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