Pin puller

Abstract

The invention relates to mining auxiliary equipment, in particular to a pin puller. The pin puller is applied to a coal mine underground hydraulic support and belongs to the technical field of mining equipment. The pin puller comprises a hydraulic cylinder and a supporting device arranged on one side of the hydraulic cylinder, wherein the supporting device is fixed with one end of a hydraulic cylinder body through a flange plate, a through hole is formed in the center of the interior of the cylinder body, a pull rod shaft is arranged in the through hole in a sleeve mode, and the pull rod shaft penetrates through the cylinder body and penetrates through the center of the supporting device to extend into a pin shaft; piston cavities are formed in cylinders located on the two sides of the through hole, pistons are arranged in the cavities, oil passing holes are formed in the cylinder body, and the oil passing holes communicate to the interiors of the piston cavities. According to the pin puller, a get-in and take-out pin pulling mode is adopted, so that the working space can be saved, the pin pulling efficiency is high, the pin puller is completely applied to the working condition requirements of a limited space under the coal mine, the manual brute force pin pulling is completely replaced, so that the pin pulling safety coefficient is improved.

Description

technical field [0001] The invention relates to mining auxiliary equipment, in particular to a pin puller, which is applied to coal mine underground hydraulic supports and belongs to the technical field of mining equipment. Background technique [0002] Underground mining work in coal mines often requires large hydraulic supports. Due to the huge height and weight of the hydraulic support, the connection between the components needs to be connected by pins, so the size and weight of the pins are also very large. When the hydraulic support needs to be lifted for maintenance, it is necessary to dismantle the large pin; however, in the face of such a huge pin, it is inefficient to use manual brute force to dismantle it, and at the same time, there may be safety hazards. If mechanical demolition is adopted, due to the limited space in the coal mine underground wall, the length of the pin shaft is long, and the machine parts occupy a large space. If the pin shaft needs to be com...

AI Technical Summary

Problems solved by technology

When the hydraulic support needs to be lifted up for maintenance, it is necessary to dismantle the large pin; however, in the face of such a huge pin, it is inefficient to use manual brute force to dismantle it, and at the same time, there may be safety hazards

If mechanical demolition is adopted, due to the limited space in the coal mine underground wall, the length of the pin shaft is long, and the machine parts occupy a large space. If the pin shaft needs to be completely removed, the limited underground space cannot meet this working condition. need

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