Normally-open safety valve with rupture disk

Abstract

The invention provides a normally-open safety valve with a rupture disk. A lower valve body is fixedly connected with an upper valve body and a base; the rupture disk is arranged in the base; a valveclack is arranged in the lower valve body and fixedly connected with a transmission rod and compression springs; a discharge port is formed in the side wall of the lower valve body; a valve clack closing structure is arranged between the valve clack and the lower valve body; by means of the valve clack closing structure, when the first compression spring and the second compression spring are in anatural state, the valve clack leaves a valve seat, a first transverse limiting through hole and a first transverse limiting groove are coaxial, and a second transverse limiting through hole and a second transverse limiting groove are coaxial; a first movable pin is located in the first transverse limiting through hole, and a second movable pin is located between the second transverse limiting through hole and the second transverse limiting groove; the first transverse limiting through hole communicates with the lower valve body through a first pressure guiding bent pipe; and the second transverse limiting through hole communicates with the lower valve body through a second pressure guiding bent pipe. The normally-open safety valve is simple in structure, and the problems of leakage and the like caused by the low opening speed and poor sealing performance of a safety valve can be solved.

Description

technical field [0001] The invention relates to a safety accessory for a pressure vessel and a high-pressure pipeline, in particular to a normally open safety valve with a burst disc. Background technique [0002] In typical chemical equipment, such as pressure vessels and high-pressure pipelines, overpressure often occurs in the equipment. If these high-pressure media cannot be released in a timely and effective manner, accidents such as overpressure explosions may occur. Therefore, many chemical equipment need to install safety valves. Or safety accessories such as bursting discs to prevent accidents such as overpressure explosions. Among them, the safety valve is the last barrier to prevent and stop the overpressure explosion of the industrial medium. The opening signal of the safety valve must be directly provided by the high-pressure medium and cannot be transmitted by other equipment. Therefore, a purely mechanical structure must be adopted. If an electromagnetic relay...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a safety valve with simple structure, which can solve the problems of slow opening speed of safety valve, intermittent leakage caused by poor sealing performance, and waste of a large amount of medium leakage caused by safety valve closing pressure or environmental pollution. Normally open safety valve

Images