Hydraulic support oil cylinder with inner hole seal part treated by adoption of laser cladding technology

Abstract

The invention discloses a hydraulic support oil cylinder with an inner hole seal part treated by the adoption of a laser cladding technology. The hydraulic support oil cylinder with the inner hole seal part treated by the adoption of the laser cladding technology comprises an outer cylinder tube, an intermediate cylinder and a movable column, the intermediate cylinder is arranged inside the outer cylinder tube, an inner hole is formed inside the intermediate cylinder, the movable column is inserted into the inner hole inside the intermediate cylinder, and a gap is reserved between a rod body part of the movable column and the wall of the inner hole and filled with emulsified liquid. A guide sleeve is arranged on an opening of the inner hole and seals the gap formed by the rod body part of the movable column and the wall of the inner hole, and an anti-corrosion alloy layer is formed at the inner surface, close to the opening and making contact with the outer wall of the guide sleeve, of the inner hole by the adoption of the laser cladding treatment technology. The device can not pollute the environment at all, a coating can not fall off, the service life is long and can be prolonged substantially, cost for maintaining the oil cylinder is saved for a user, and coal exploitation efficiency is improved.

Description

technical field [0001] The invention relates to a hydraulic support oil cylinder whose inner hole sealing part is processed by laser cladding technology. [0002] Background technique [0003] The domestic coal industry has passed the golden decade, and the price of coal continues to drop. For coal mining companies, how to improve coal mining efficiency and reduce coal mining costs is imminent. The hydraulic support is an important support equipment for coal mine mining, which is very important to the safe production of coal mines. Due to the complex working environment underground, the outer surface of the oil cylinder is usually protected by industrial electroplating, laser cladding and other means of corrosion protection, while the anti-corrosion method of the inner hole There are few good solutions. [0004] Because the inner hole of the hydraulic support cylinder has been soaked in the emulsion for a long time, the emulsion has a certain anti-corrosion ability under ...

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Problems solved by technology

The hydraulic support is an important support equipment for coal mine mining, which is very important to the safe production of coal mines. Due to the complex working environment underground, the outer surface of the oil cylinder is usually protected by industrial electroplating, laser cladding and other means of corrosion protection, while the anti-corrosion method of the inner hole few good solutions

[0004] Because the inner hole of the hydraulic support cylinder has been soaked in the emulsion for a long time, the emulsion has a certain anti-corrosion ability under the condition of good sealing and good water quality, so anti-corrosion treatment is usually not used, but the sealing part of the inner hole will be corroded by the outside world. Exposure to atmosphere leads to corrosion failure, which in turn affects the service life of the entire oil cylinder. The corrosion of the sealing part is usually removed by machining the inner hole, and the size of the part is often out of tolerance, so it can only be solved by replacing the non-standard sealing ring. , will inevitably increase the maintenance cost

[0005] At present, the anti-corrosion method of the sealing part of the inner hole of the hydraulic support is electroplating. Although it has certain anti-corrosion performance after electroplating, the coating and the substrate are physically combined, the coating is easy to fall off, and it pollutes the electroplating process environment

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