Valve opening and closing auxiliary device

Abstract

The invention discloses an auxiliary device for opening and closing a valve, which includes a shut-off valve used to quickly cut off the gas source in case of natural gas leakage or fire accidents. The shut-off valve is provided with a rotary handle for driving the shut-off valve to open and close. The cut-off valve is also provided with a threaded rod for controlling the opening and closing of the cut-off valve, and a driving auxiliary mechanism for reducing the force intensity required to drive the cut-off valve is provided between the rotating handle and the threaded rod; through the above-mentioned driving auxiliary mechanism The setting can effectively reduce the effort required to manually turn the shut-off valve, improve the driving efficiency of the shut-off valve, ensure the stable operation of the shut-off valve, and improve safety, and the shut-off valve will not follow the opening and closing The change changes the height of the rotary handle so that it can be operated by ordinary people when needed, improving practicality.

Description

Technical field [0001] The present invention belongs to the field of valve, in particular, to a valve opening and closing assist device. Background technique [0002] Natural gas is a flammable gas, although it may make a significant change, but the main components are methane, fire hazard is a class apore, leakage to the air, which is easy to explode and fire, the situation of natural gas, saving or fireting Most importantly, the most basic measure is to quickly cut off the gas source, and now disclose a truncation valve in the public document of CN204592323U, eliminating unnecessary extrusion, scraping phenomenon of the butterfly plate and the valve seat, alleviating Turn on the barritch, reduce wear, improve the seat life of the valve seat; in addition, the gap of the valve stem and the valve body is conducive to the enhancement of the sealing effect, preventing the medium leakage; however, when the truncation valve is rotated, cut off the valve Keeping a tight weight, it is n...

AI Technical Summary

Problems solved by technology

[0002] Natural gas is a combustible gas. Although its composition may vary greatly, the main component is methane. The fire hazard is Class A. Leakage into the air can easily cause explosions and fires. In the case of natural gas fires, it is necessary to fight or extinguish the fire. The most important and basic measure is to cut off the gas source quickly. Now the public document with the publication number CN204592323U discloses a cut-off valve, which eliminates unnecessary excessive extrusion and scratching of the butterfly plate and valve seat, and reduces the The opening resistance distance reduces wear and improves the service life of the valve seat; in addition, the gap between the valve stem and the valve body is filled with multi-layer packing, which is beneficial to enhance the sealing effect and prevent medium leakage; however, when the shut-off valve is rotated, the shut-off valve The fixing is tight, and it takes a lot of effort to open the shut-off valve, and the shut-off valve is generally high. Due to the height problem, when the rotating handle rises to a certain height, it cannot continue to rise, which is very inconvenient

Images