Locking device for 90 degree rotary valve

Abstract

The present invention discloses a locking device of a 90 degrees rotary valve for locking a ball valve and a disc valve to an open or close position. When being used, the locking device fixes a lock body with a valve body, a drive body in the lock body is fixed with a valve spindle, and the lock body is mounted with two symmetric lock devices. The rotary valve can be opened or closed only by inserting or drawing a key. By the design of the key and a key slot, the rotary valves adjacent in open and close order can be controlled in real time, that is, only the key drawn after a former order valve is opened can be used to open a later order rotary valve, so the interconnected control for all rotary valves in the system can be realized; so the wrong operation or artificial destroy can be avoided. The invention can be applied to the field of petroleum and chemical industry and can improve the reliability for the system.

Description

technical field [0001] The invention relates to a lock, in particular to a locking device for locking a ball valve and a butterfly valve in an open or closed position. Background technique [0002] In the prior art, a rotary valve with a spool rotation angle of 90° between opening and closing (hereinafter referred to as a rotary valve or a 90° rotary valve), including ball valves and disc valves, is mainly composed of a valve body, a valve core and a valve stem. The valve core is set in the valve body, and the valve core forms two states of opening and closing in the valve body through rotation. The valve stem is connected with the valve core, and the valve stem is used to input external power to make the valve core rotate. There are many such valves, and the normal operation process needs to switch the valves in a certain order, especially when used in flammable, explosive, high temperature, high pressure and other media, a wrong operation may cause disastrous consequences;...

AI Technical Summary

Problems solved by technology

There are many such valves, and the normal operation process needs to switch the valves in a certain order, especially when used in flammable, explosive, high temperature, high pressure and other media, a wrong operation may cause disastrous consequences; in addition, In these workplaces, not only people with operating authority are often present, but also other people are often engaged in other work, and the misoperation of these people is also very dangerous.

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