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

Abstract

The invention relates to a driving device of a fast-open and slow-close safety valve, solves the technical problems that an existing quick-break safety valve driving mechanism is long in response time, short in service life and the like, and belongs to the technical field of industrial process control. The driving device comprises a clutch, a valve rod, a gear set and a motor, and is characterized in that two ends of the clutch are respectively connected with a driven shaft of the clutch and a driving shaft of the clutch, the driving shaft of the clutch is coaxially and fixedly connected with a gear A, and the gear A is engaged with a driving gear; the driven shaft of the clutch is coaxially and fixedly connected with a gear C, a gear B is engaged with the gear C; the gear B and a gear D are connected through a connecting shaft, and the gear B, the gear D and the connecting shaft are coaxial and can rotate synchronously; the gear D is engaged with a rack; the rack is fixedly connected with the valve rod through a connecting block; a spring is serially connected on the valve rod, one end of the spring is fixed to a driving frame, the other end of the spring is fixedly connected with the connecting block, and the lower end of the valve rod is connected with a valve. When the driving device is closed, the driving device is driven by the spring, so that the closing response is quick, the service life is long, and the driving device can be applied to a large-diameter valve.

Description

technical field [0001] The invention relates to a safety valve for the control of the fuel gas and fuel delivery process, in particular to a driving device for a slow-opening and fast-closing safety valve and a driving method thereof, belonging to the technical field of industrial process control safety valves. Background technique [0002] Safety valves are generally composed of valve body, valve core, driving device, etc., and are widely used in various industries, especially in some industrial fields related to production safety. In case of emergency, the safety valve responsible for fluid control must be in the shortest possible time Close the spool and cut off the fluid within a short time, thereby reducing losses or avoiding accidents. Therefore, safety quick-break valve technology and reliability are extremely important. [0003] At present, there are mainly two types of safety valves in the world. One is the pneumatic quick-closing valve, which is driven by the comp...

AI Technical Summary

Problems solved by technology

[0006] 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, short service life, and small valve caliber, to 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, Reduce the impact of instantaneous flow and quickly close the valve core to achieve the purpose of safety protection

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