Method for opening and closing double-layer valve element assembly of pipeline valve

Abstract

The invention relates to a method for opening and closing a double-layer valve element assembly of a pipeline valve. The method is characterized in that an opening and closing method of a pipeline double-layer valve element cylinder valve and double-layer valve element check valve assembly structure and a pipeline double-layer valve element cylinder valve and double-layer valve element check valveassembly is adopted by the double-layer valve element assembly of the pipeline valve, and a double-layer valve element check valve has a double-layer valve element cylinder valve work state, an online production state and a online production stopping state. According to the method for opening and closing the double-layer valve element assembly of the pipeline valve, the problem that a cylinder valve and a check valve cannot achieve online maintenance and valve body and valve element replacement is solved; under the condition that medium flowing of a power pipeline is not stopped, a double-layer valve element cylinder valve and the double-layer valve element check valve are opened and closed, and online overhauling of the double-layer valve element cylinder valve and a valve element or a valve rod and a valve element of the double-layer valve element check valve is achieved. Especially, great convenience is brought to overhauling and replacing of singly used cylinder valves and check valves on poisonous and harmful power pipelines.

Description

technical field [0001] The invention belongs to the technical field of pipeline valve maintenance, and relates to an on-line production and maintenance of the opening and closing of a combination of a double-layer spool cylinder valve and a double-layer spool check valve without affecting the medium flow of a power pipeline. Or the method for replacing the cylindrical valve and the check valve of the pipeline without error production, in particular to a method for opening and closing the double-layer valve core assembly of the pipeline valve. Background technique [0002] At present, domestic and foreign industries such as metallurgy, mineral processing, petroleum, chemical industry, coal-fired power generation, nuclear power generation, nuclear power, gas, natural gas, steam, sewage purification, tap water pipelines, etc. are equipped with cylindrical valves and check valves for pipelines with gas and fluid medium flow. Opening and closing devices such as valves. The main ...

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the above-mentioned defects, and aims to provide a pipeline valve double-layer valve core assembly to solve the problems of online maintenance, replacement of valve body, valve core, valve stem, etc. without affecting the flow of power pipeline medium. open and close method

Images