Water supply pipe with high wear resistance

Abstract

The utility model relates to a water supply pipe with high wear resistance, which comprises a water pipe connector, a tungsten carbide coating is plated on the outer surface of a base body of the water pipe connector, the thickness of the tungsten carbide coating is 0.25 mm, the surface hardness of the tungsten carbide coating is not lower than 70 HRC, the bonding strength of the tungsten carbide coating and the base body of the water pipe connector is not lower than 70 MPa, the surface of the tungsten carbide coating is subjected to finish machining, and the surface of the tungsten carbide coating is not lower than 70 HRC. And the surface roughness is lower than 0.4 mu m. The tungsten carbide coating is arranged on the water pipe connector, so that the abrasion resistance of the water supply pipe is greatly improved, the service life of the water supply pipe is greatly prolonged, the sealing reliability of the spray water supply device in the rocker arm of the coal mining machine is improved, and the service life of the spray water supply device is prolonged.

Description

Technical Field

[0001] The utility model relates to a water supply pipe, in particular to a water supply pipe with high wear resistance used for a rocker arm of a coal mining machine. Background Art

[0002] Figure 2 The figure shows the sealing installation structure at the joint of the water supply pipe of the coal mining machine rocker arm. The first water seal a, the second water seal b, and the oil seal c are all installed on the outer diameter of the joint of the water supply pipe 1. The outer diameter of the joint of the water supply pipe is its important working surface. The water supply pipe is a key component to ensure the normal operation of the spray water supply device in the coal mining machine. The interior of the rocker arm cavity is lubricating oil, and the interior of the water supply pipe is spray cooling water. The above-mentioned water seal and oil seal serve to isolate the two. Once the water seal and oil seal fail, the spray cooling water enters the rocker arm cavity, causing oil and water mixing and then emulsification of the lubricating oil, which affects the lubrication effect. In severe cases, it will cause the failure of the gears in the transmission system, thereby affecting the normal operation of the coal mining machine.

[0003] The outer diameter surface of the existing coal mining machine rocker arm water supply pipe joint is easy to wear and has a short service life, which easily leads to failure of the water seal and oil seal. Utility Model Content

[0004] The utility model provides a water supply pipe with high wear resistance and a long service life.

[0005] The main technical solutions of this utility model are:

[0006] A highly wear-resistant water supply pipe comprises a water pipe joint. The outer surface of a base of the water pipe joint is plated with a tungsten carbide coating.

[0007] The thickness of the tungsten carbide coating is preferably 0.25±0.1 mm.

[0008] The surface hardness of the tungsten carbide coating is not less than 70HRC.

[0009] The bonding strength between the tungsten carbide coating and the substrate of the water pipe joint is preferably not less than 70 MPa.

[0010] The surface of the tungsten carbide coating is finely processed, and the surface roughness is preferably not less than 0.4 μm.

[0011] The thickness of the tungsten carbide coating is 0.25±0.1 mm, and the surface hardness is not less than 70HRC.

[0012] The thickness of the tungsten carbide coating is 0.25±0.1 mm, the surface hardness is not less than 70HRC, the surface of the tungsten carbide coating is finely processed, and the surface roughness is less than 0.4 μm.

[0013] The thickness of the tungsten carbide coating is 0.25±0.1 mm, the surface hardness is not less than 70HRC, the bonding strength with the substrate of the water pipe joint is not less than 70MPa, the surface of the tungsten carbide coating is finely processed, and the surface roughness is less than 0.4μm.

[0014] The tungsten carbide coating is preferably sprayed by supersonic flame spraying.

[0015] The beneficial effects of the utility model are:

[0016] By providing a tungsten carbide coating on the water pipe joint, the wear resistance and service life of the water supply pipe are greatly improved, thereby improving the reliability and service life of the seal of the spray water supply device in the coal mining machine rocker arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an embodiment of a highly wear-resistant water supply pipe of the utility model;

[0018] Figure 2 The utility model relates to a sealing installation structure for a water supply pipe joint of an existing coal mining machine rocker arm.

[0019] Reference numerals:

[0020] 1. Water supply pipe; 11. Water pipe joint; 111. Coating; a. First water seal; b. Second water seal; c. Oil seal. DETAILED DESCRIPTION

[0021] like Figure 1 As shown, the present invention discloses a highly wear-resistant water supply pipe (hereinafter referred to as water supply pipe 1), comprising a water pipe joint 11, the outer surface of the base of which is plated with a tungsten carbide coating 111. Due to the high hardness of tungsten carbide, the wear resistance of the water supply pipe is significantly improved, thereby extending the service life of the water supply pipe. Furthermore, when used for spraying in the rocker arm of a coal mining machine, the water supply device can be improved in terms of sealing reliability and service life.

[0022] The highly wear-resistant water supply pipe may further adopt an optimized design of one or more combinations of the following:

[0023] The thickness of the tungsten carbide coating is preferably 0.25±0.1 mm.

[0024] The surface hardness of the tungsten carbide coating is not less than 70HRC.

[0025] The bonding strength between the tungsten carbide coating and the substrate of the water pipe joint is preferably not less than 70 MPa, and the coating is not easy to fall off.

[0026] The surface of the tungsten carbide coating is finely processed, and the surface roughness is preferably not less than 0.4 μm.

[0027] The tungsten carbide coating is preferably sprayed by supersonic flame spraying, which can easily ensure the quality of the coating.

Claims

1. A highly wear-resistant water supply pipe, characterized by: It includes a water pipe joint, and the outer surface of the base of the water pipe joint is plated with a tungsten carbide coating. The thickness of the tungsten carbide coating is 0.25±0.1mm, the surface hardness is not less than 70HRC, and the bonding strength with the base of the water pipe joint is not less than 70MPa. The surface of the tungsten carbide coating is finely processed, and the surface roughness is less than 0.4μm.

2. The highly wear-resistant water supply pipe according to claim 1, characterized in that: The tungsten carbide coating is sprayed by supersonic flame spraying.

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