Hard alloy composite sealing structure and preparing technology thereof

Abstract

The invention relates to a hard alloy composite sealing structure and a preparing technology thereof. The hard alloy composite sealing structure comprises a valve seat machining part and a sealing ring machining part. In the valve seat machining part, a casting is fixedly arranged on a valve seat machining clamp inclining by 4-15 degrees, and after the sealing face thickness of 4-8 mm is reserved, a sealing face of the valve seat is roughly turned, and surfacing of a first hard alloy layer is conducted on the sealing face of the valve seat; and in the sealing ring machining part, a sealing ring blank is arranged on a sealing ring machining clamp of a lathe, and after the sealing face of the sealing ring is finely turned, surfacing of a second hard alloy layer is conducted on the sealing face of the sealing ring. According to the hard alloy composite sealing structure and the preparing technology thereof, the machining technology cost is low, the sealing precision is high, the product can achieve zero friction, zero leakage and both-way pressure bearing and achieves real high performance, a sealing pair is all metal, and once after closing is conducted in place, sealing is very reliable, and the application temperature range is wide.

Description

technical field [0001] The invention relates to a cemented carbide composite sealing structure and a preparation process thereof. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Ball valves, butterfly valves, check valves, gate valves, steam traps, etc. Since the valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, the sealing performance of the valve has high requirements. [0003] At present, the disc plate of most butterfly valves is provided with a sealing ring groo...

AI Technical Summary

Problems solved by technology

As a sealing ring, it can avoid the impulsive force in the fluid. It has high requirements for the outer surface roughness and shape tolerance of the full hard sealing ring, and the processing technology is difficult, so the processing cost of the full hard material is high.

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