Tool special for demounting hydraulic support pin shaft under coal mines

Abstract

A time-saving, strength-saving, safe and convenient tool special for demounting a hydraulic support pin shaft under coal mines comprises a hydraulic cylinder provided with a liquid inlet and a liquid return port, wherein a hydraulic cylinder plunger is connected into the hydraulic cylinder. The tool is characterized in that a sleeve is fixedly connected at the front end of the hydraulic cylinder, the hydraulic cylinder plunger is located in the sleeve, a connection block is connected at the front end of the hydraulic cylinder plunger, a bolt-penetrating hole is arranged on the connection block, and a connection bolt is arranged in the bolt-penetrating hole. The connection bolt comprises a head portion and a screw, and the internal diameter of the bolt-penetrating hole is larger than the external diameter of the screw portion of the connection bolt and smaller than the external diameter of the head portion of the connection bolt. The connection block is of a U-shaped structure and comprises a connection plate arranged in the middle and lateral plates arranged on two sides, and through holes are arranged on the lateral plates. A pin-penetrating hole is arranged at the front end of the hydraulic cylinder plunger, the connection block is connected with the hydraulic cylinder plunger through a pin, the pin penetrates through the pin-penetrating hole and the through holes arranged on the connection block, and the front end of the hydraulic cylinder plunger is located between the two lateral plates of the connection block.

Description

technical field [0001] The invention relates to a mining tool, in particular to a special tool for removing a pin shaft of a hydraulic support under a coal mine. Background technique [0002] Some coal mines are limited by the lifting capacity of the auxiliary shaft and the transportation capacity of the underground roadway rails, and it is impossible to transport the top coal caving hydraulic support used in the fully mechanized caving face as a whole. Some of the top coal caving hydraulic supports weigh 27.6 tons. × height = 7.8m × 1.5m × 2.3m. According to the actual situation of the coal mine, the hydraulic support must be dismantled when going up and down the shaft, but it is inconvenient to remove the hinge pins of each structural part, especially for the supports removed after the mining of the working face. It is laborious and affects the overall removal progress of the working face. Contents of the invention [0003] The purpose of the present invention is to pr...

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Problems solved by technology

[0002] Some coal mines are limited by the lifting capacity of the auxiliary shaft and the transportation capacity of the underground roadway rails, and it is impossible to transport the top coal caving hydraulic support used in the fully mechanized caving face as a whole. Some of the top coal caving hydraulic supports weigh 27.6 tons. × height = 7.8m × 1.5m × 2.3m

According to the actual situation of the coal mine, the hydraulic support must be dismantled when going up and down the shaft, but it is inconvenient to remove the hinge pins of each structural part, especially for the supports removed after the mining of the working face. It is laborious and affects the overall removal progress of the working face

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