Non-depressurization valve changer and using method

Abstract

The invention discloses a non-depressurization valve changer and a using method. The valve changer comprises a threaded rod, a threaded sleeve and a connecting base, the threaded rod is in threaded connection with the threaded sleeve, the threaded sleeve is in threaded connection with the connecting base, and the lower end of the threaded rod is in threaded connection with a lower padded nut. A rubber sleeve is arranged at the position, located between the threaded sleeve and the lower padded nut, of the threaded rod, the lower portion of the threaded rod is in threaded connection with an upper padded nut, and the upper padded nut is welded and fixed with the upper end of the threaded sleeve. The rubber sleeve at the lower end of the threaded sleeve penetrates through a ball valve to be replaced and then enters a gas pipeline, then the rubber sleeve is extruded through the lower end of the threaded sleeve, the rubber sleeve expands and is tightly attached to the inner wall of the gas pipeline, and therefore gas in the gas pipeline is prevented from flowing out through the expanded rubber sleeve; and therefore, the leaked ball valve to be replaced can be disassembled and replaced with a new ball valve under the condition that pressure is not reduced.

Description

technical field [0001] The invention relates to a non-depressurizing valve changer and a use method thereof, belonging to the technical field of gas valve emergency repair. Background technique [0002] In the daily rescue and repair work of gas pipelines, it is often encountered that the DN40 or DN25 release ball valve thread or handle leaks on the medium-pressure main pipeline. Most of these leaks are in closed spaces such as valve wells, and the pressure is reduced every time. Replacing a new ball valve, this treatment method will not only release a large amount of gas source, cause environmental pollution, and have major safety hazards, but may also cause large-scale gas shutdown. Contents of the invention [0003] The purpose of the present invention is to provide a non-depressurization valve changer and its use method, so that the leaking ball valve can be quickly and safely replaced without depressurization, which not only eliminates potential safety hazards, but al...

AI Technical Summary

Problems solved by technology

[0002] In the daily rescue and repair work of gas pipelines, it is often encountered that the DN40 or DN25 release ball valve thread or handle leaks on the medium-pressure main pipeline. Most of these leaks are in closed spaces such as valve wells, and the pressure is reduced every time. Replacement of new ball valves, this treatment method will not only release a large amount of gas source, cause environmental pollution, and have major safety hazards, but also may cause large-scale gas shutdown

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