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Corrosion-resistant single-body hydraulic supporter and its processing method

A technology of a single hydraulic prop and a processing method, which is applied in the direction of props/supports, earthwork drilling and mining, and devices for coating liquid on the surface, which can solve the problem of affecting the comprehensive mechanical properties of the matrix, unfavorable physical and mental health of operators, and affecting the sealing performance of products and other issues, to achieve strong market competitiveness and promotion and application prospects, superior sealing performance, superior flame retardant and antistatic performance

Inactive Publication Date: 2009-04-08
山东能源装备集团莱芜装备制造有限公司
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Problems solved by technology

However, the electroplating anti-corrosion layer still has the following disadvantages: (1) serious environmental pollution, which is not conducive to the physical and mental health of operators; (2) hydrogen embrittlement exists, which affects the comprehensive mechanical properties of the substrate; Corrosion spots appear, causing pitting to appear basically, causing the coating to fall off in flakes, further accelerating the basic corrosion degree, and affecting the sealing performance of the product

Method used

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  • Corrosion-resistant single-body hydraulic supporter and its processing method

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Embodiment Construction

[0015] The single hydraulic prop used in the downhole of the present invention consists of a top cover 1, a three-purpose valve 2, a return spring 3, a live cylinder 4 (including a column head), a handle body 5, an oil cylinder 6, a piston or a retaining ring 7, a base body 8 and a seal parts and other components. The surface of the live cylinder 4 (including the surface of the valve hole at the column head), the surface of the left valve cylinder and the surface of the right valve cylinder of the three-purpose valve 2, and the surface of the oil cylinder 6 are coated with polyvinyl chloride coating through thermal melting and absorption, and the total thickness of the plastic coating layer is 0.32 ~0.45mm.

[0016] The processing method of above-mentioned polyvinyl chloride coating is:

[0017] The first step: the oil cylinder 6, the live cylinder 4 and the left and right valve workpieces of the three-purpose valve 2, which need to be treated with anti-corrosion and wear-res...

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Abstract

The invention discloses a corrosion resistant individual hydraulic prop and a processing method thereof, which is mainly realized by that a polyvinyl chloride coating is respectively processed on the surface of a hydrocylinder, the surface of a movable podetium, and the surfaces of a left valve cylinder and a right valve cylinder of a three-purpose valve. Compared with the currently-used individual hydraulic prop with an electroplating corrosion resistant layer, the corrosion resistant performance of the individual hydraulic prop is improved by more than five times, reaching 1000 hours, and the corrosion resistant layer is smooth, has no peeling-off and no pores, thus greatly improving the performances of working corrosion resistance, anti-aging and wear resistance.

Description

technical field [0001] The invention relates to a single hydraulic prop for mining. Background technique [0002] There are two types of single hydraulic props used in underground coal mines: inner injection type and outer injection type. Due to the harsh production conditions in the mine, high air humidity and acidic mine water, it is easy to cause electrochemical corrosion on the working surface of the pillar and affect its sealing performance. Therefore, anti-corrosion treatment is required. The most advanced treatment method is to electroplate a 25-40um tin bronze layer on the surface of the inner hole of the oil cylinder, the surface of the left and right valve cylinders of the three-way valve, and electroplate a 15-20um zinc-nickel alloy layer on the surface of the living cylinder, and its corrosion resistance can reach 300 hours or more. However, the electroplating anti-corrosion layer still has the following disadvantages: (1) serious environmental pollution, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/44B05D7/24B05D3/00
Inventor 周峰冯培杰杜伯奇郭彦光王华远王涛吕宏伟王昕张进海彭迎新段秀兰纪英军王仲水
Owner 山东能源装备集团莱芜装备制造有限公司
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