A driving device and driving method for a slow-opening and fast-closing safety valve

Abstract

The invention belongs to the technical field of safety valves, and relates to a safety valve for the control of the fuel gas and fuel delivery process, in particular to a driving device and a driving method for a slow-opening and fast-closing safety valve. The valve stem is connected to the spring, the other end is connected to the lever spring, and connected to the support rod through a pulley; one end of the pull rod is connected to the middle of the lever, and the other end is equipped with a cylindrical protrusion. One side of the pull rod is equipped with a curved cam. The side line is in tangent contact with the cylindrical protrusion, and the rotating shaft of the curved cam is placed in the key groove of the pull rod, and moves up and down in the key groove as the curved cam rotates. The driving method of the present invention uses the slow opening of the involute curve cam and the quick closing of the spring lever principle, and only needs a small power motor to drive the cam to open the valve core easily and stably without the need for electromagnetic coils or pneumatic valve cores. Large parts such as cylinders; when closed, it is driven by springs, with fast valve closing speed and long service life.

Description

technical field [0001] The invention belongs to the technical field of industrial process control safety valves, and relates to a safety valve for gas and fuel oil transmission process control, in particular to a driving device and a driving method for a slow-opening and fast-closing safety valve. Background technique [0002] Safety valves are generally composed of valve body, valve core, driving device, etc., and are widely used in thermal power, petroleum, shipping, steelmaking, chemical, pharmaceutical and other industries, especially in some industrial fields related to production safety. , The safety valve responsible for fluid control must close the spool and cut off the fluid in the shortest possible time, so as to reduce losses or avoid accidents. Therefore, the importance of safety quick-break valve technology and reliability is self-evident. [0003] At present, there are two main types of quick-closing valves in the world. One is the pneumatic quick-closing valv...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing quick-break safety valve core drive mechanism, such as long response time and short life, and provide a slow-opening and fast-closing safety valve drive device and its driving method, so as to realize slow opening of the valve core and reduce instantaneous flow impact , and quickly close the spool to achieve the purpose of safety protection

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