Hydraulic support frame

Abstract

The invention discloses a hydraulic support frame. The frame comprises a low position caving top coal hydraulic support frame, and the low position caving top coal hydraulic support frame comprises atop beam and a vertical column, a base, a cover beam, a guard plate, a guard jack, a front conveyor pushing jack, a rear conveyor pulling jack and a tail beam, a tail beam jack, an inserting board andan inserting board jack of a coal placing mechanism and an electro-hydraulic control system; the electro-hydraulic control system includes a bracket controller, an electro-hydraulic valve group, a vertical column pressure sensor, a pushing jack stroke sensor, a tail beam jack stroke sensor, an inserting board jack sensor, a vertical column and signal lines of each jack sensor. The frame is addedwith the functions of detecting and controlling the extension length of the inserting board and adjusting the size of a coal placing mouth on the basis of retaining the advantages of the electro-hydraulic control and the hydraulic support of the low position caving top coal, can improve the control effect of the coal placing, adds an adjustable variable for the electro-hydraulic control amount ofthe caving top coal, and increases the control methods of the caving top coal.

Description

technical field [0001] The invention relates to the technical field of fully mechanized coal mining top coal caving technology and supporting equipment thereof, in particular to a hydraulic support. Background technique [0002] At present, the geological conditions of coal mines are complex and various hydraulic supports are required. For example, Changcun Coal Mine has moderate geological conditions, a mining depth of about 980m, and high pressure. ZF5500 / 18 / 28, ZF6400 / 17.5 / 28, and ZF7000 / 18 / 28 hydraulic supports have been used successively , to a certain extent, cannot meet the requirements of use, because the existing ZF5500 / 18 / 28, ZF6400 / 17.5 / 28, ZF7000 / 18 / 28 hydraulic supports all have the phenomenon of low pressure when the mining depth is about 980m. At the same time, the sensor of the plug-in jack of the top-coal caving hydraulic support adopts a proximity switch, which can only detect the expansion and contraction of the plug-in board, but cannot detect and control...

AI Technical Summary

Problems solved by technology

[0002] At present, the geological conditions of coal mines are complex and various hydraulic supports are required. For example, Changcun Coal Mine has moderate geological conditions, a mining depth of about 980m, and high pressure. ZF5500 / 18 / 28, ZF6400 / 17.5 / 28, and ZF7000 / 18 / 28 hydraulic supports have been used successively , to a certain extent, cannot meet the requirements of use, because the existing ZF5500 / 18 / 28, ZF6400 / 17.5 / 28, ZF7000 / 18 / 28 hydraulic supports all have the phenomenon of low pressure when the mining depth is about 980m

At the same time, the sensor of the plug-in jack of the top-coal caving hydraulic support adopts a proximity switch, which can only detect the expansion and contraction of the plug-in board, but cannot detect and control the extension length of the plug-in board, that is, the size of the coal discharge port cannot be adjusted, so it cannot be well adapted to different situations. The requirements of the coal seam for the top-coal caving process; during the coal caving process, there is a problem of the roof beam leaning forward, and the roof beam has no tilt sensor, which cannot ensure the horizontal state of the support top beam, which affects the stability of the support support

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