Stop valve with replaceable dual-core

Abstract

The invention discloses a stop valve with a replaceable dual-core. The stop valve comprises a hand wheel, a valve-stem nut, a support, a sealing ring, a sealing liner, a valve stem, a valve cover, a winding gasket, a self-repair dual seal valve core, a comb-running cover, a demountable valve seat and a valve body. The conical surfaces and the flat surfaces of the self-repair dual seal valve core and the valve seat form a dual seal structure, due to the dual seal structure, the service life of the valve is greatly prolonged, and the sealing performance of the valve is also improved; the demountable valve seat, the valve body, the valve stem and the self-repair dual seal valve core are all made by forging, the density of the valve body is greatly improved, under a bad working condition, the valve body is not liable to generate fatigue cracks, and the long-term operational reliability is high; when the valve needs to be maintained, after the valve cover is taken out, the self-repair dual seal valve core can be directly replaced; by employing the comb-running cover and the demountable valve seat, the stop valve can be maintained quickly.

Description

technical field [0001] The invention relates to the field of drainage and sewage valves, in particular to a replaceable double-core stop valve. Background technique [0002] At present, the drainage and sewage pipelines of power plants are equipped with stop valves. Although the current stop valve technology is relatively mature, the current use of stop valves still does not fully meet the long-term sealing life and rapid replacement requirements of the drainage and sewage system of power plants. The main disadvantages of the current use of stop valves are: Sealing, once the single-stage seal fails, the entire seal will fail; the seal of the valve adopts the method of disassembly and assembly as a whole, once it needs to be replaced, the entire valve needs to be removed, and all the sewage in the entire pipeline will leak, causing environmental pollution. [0003] Therefore, according to the stringent requirements of the drainage and sewage system of the power plant, a stop...

AI Technical Summary

Problems solved by technology

Although the current stop valve technology is relatively mature, the current use of stop valves still does not fully meet the long-term sealing life and rapid replacement requirements of the drainage and sewage system of power plants. The main disadvantages of the current use of stop valves are: Sealing, once the single-stage seal fails, the entire seal will fail; the seal of the valve adopts the method of disassembly and assembly as a whole, once the situation needs to be replaced, the entire valve needs to be removed, and all the sewage in the entire pipeline will leak, causing environmental pollution

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