Large-channel straight guide type caving-coal transitional hydraulic bracket

Abstract

The invention relates to a large-channel straight guide type caving-coal transitional hydraulic bracket which comprises upright posts, a top beam and a base, wherein two ends of the top beam are articulated, four upright posts are symmetrically arranged in a form of front and rear rows, a top beam side guard plate is arranged at one side of the top beam, a front beam is articulated at the front end of the top beam, a front beam jack is articulated between the top beam and the front beam, a flexible beam is inserted into the front beam, a flexible beam jack is articulated between a top plate lapped with the front beam and the flexible beam, a tail beam is articulated at the rear end of the top beam, a tail beam side guard plate is arranged at one side of the tail beam, a flashboard is arranged in the tail beam, a flashboard jack is used for pulling and pushing the flashboard, a tail beam jack is articulated between the base and the tail beam, a thrust mechanism, a foot board and a rear-sliding push mechanism are arranged on the base, a straight guide type mechanism is arranged between the base and the top beam between the front and rear rows of upright posts, the straight guide type mechanism comprises a base assembling box body which is integrated with the base and a guide box body corresponding to the base assembling box body, the other end of the guide box body is articulated with the top beam, and a pedestrian passageway is arranged between the straight guide type mechanism and the front row of upright posts.

Description

technical field [0001] The invention relates to the technical field of coal mining support equipment in coal mines, in particular to a large channel linear guide type top coal caving transition hydraulic support used for top coal caving mining working faces. Background technique [0002] The top coal caving hydraulic support is the key equipment for the top coal caving mining method. The top coal caving transition hydraulic support is a special hydraulic support used for the transition section at both ends of the top coal caving face. The innovation and development of the frame type is the top coal caving mining technology. Important conditions and signs of innovation and development. At present, the frame types of the top coal caving transition hydraulic support mainly include the reverse four-link support type, the positive link support type and the single-swing rod support type. These frame types have their own advantages and disadvantages. Accelerating and deepening the...

AI Technical Summary

Problems solved by technology

At present, the frame types of caving transition hydraulic supports mainly include reverse four-link support type, positive link support type and single pendulum support type. These frame types have their own advantages and disadvantages. Accelerating and deepening the understanding of comprehensive mechanized mining, the performance of these supports can no longer fully meet the requirements of thick and extra-thick coal seam mining. Under suitable conditions, combined with the top-coal caving mining process, the top-coal caving transition support frame type is improved. , to provide equipment guarantee for safe and efficient fully mechanized mining

[0003] The top-coal caving transition bracket is used for the transition section of the head and tail of the fully-mechanized top-coal caving face. It should provide a safe working space for the front and rear transition sections of the scraper conveyor. Some reducers and motors are large in size, and the driving parts of the front and rear scraper conveyors generally need to be arranged in parallel, which takes up a lot of space. Therefore, the reverse four-link frame transition hydraulic support is generally used instead of the positive four-link frame. Hydraulic support, although this type of frame can provide cover space for the front and rear scraper conveyors, but limited by the characteristics of the frame structure, there is not enough pedestrian space, the top beam is long, the support strength is low, and the whole frame is heavy, especially In the case of large working resistance, the support is limited by the four-link structure, the strength is low, the stability is poor, and the ventilation section of the support is small. Especially in the conditions of large mining and high caving coal face or high gas mine, it is difficult to meet the requirements of coal mine safety production regulations

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