PVC (Polyvinyl Chloride) prop shoe and manufacturing technology

Abstract

The invention discloses a PVC (Polyvinyl Chloride) prop shoe which comprises a main prop shoe body and a circular groove, wherein the circular groove is arranged at the upper part of the main prop shoe body; and ribbed slabs and recovering lugs are distributed on the outer wall of the upper part of the main prop shoe body. The longitudinal profile of the main prop shoe body is ladder-shaped; the number of the ribbed slabs is seven; and the ribbed slabs and the recovering lugs are distributed uniformly. A steel plate is arranged inside the lower part of the main prop shoe body; and holes with the same diameter are arranged on the steel plates. By the improved production process and technology of the PVC prop shoe, the main stressed part, i.e. the main prop shoe body and the steel plate are injected and molded into a whole structural element, and therefore, the stress structure of the PVC prop shoe is improved, the problem that the traditional prop shoe is easy to damage due to stress concentration is avoided, the PVC prop shoe has reasonable structure, uniform stress and good stability, a ground contact area of the prop shoe can be effectively enlarged, a support is prevented from leaning, and the occurrence rate of incidents is reduced. Meanwhile, the PVC (Polyvinyl Chloride) prop shoe has very good effects of anti-static electricity, combustion resistance, ageing resistance and corrosion resistance, has light weight and can be recycled.

Description

technical field [0001] The invention relates to an accessory for a support device of a coal mining face in a coal mine, in particular to a high-strength, antistatic, flame-resistant PVC column shoe that can be supported by a built-in steel plate and a manufacturing process. Background technique [0002] In order to ensure safety and orderly production in coal mines, wooden pillars, steel pillars or hydraulic pillars must be used as support between the upper and lower rock layers (commonly known as roof and floor) of the working face (coal mining site) to maintain work The stability and completeness of the top panel. In order to increase the contact area and stress area of ​​the pillar to the bottom plate and improve the stability, it is generally adopted to add a column shoe to the pillar. At present, the pillars of the coal mining face in coal mines mostly use wooden column shoes and cast iron column shoes, and sometimes nylon steel column shoes are also used. These tradit...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength, antistatic, flame-resistant PVC column shoe with built-in steel plate support and its production process. By improving the process formula and technology of the PVC column shoe, it is difficult to overcome the existing column shoe Recycling, low reuse rate, time-consuming and laborious disassembly, high support cost, easy to slide, easy to cause coal mine safety accidents, etc.

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