High-performance, high-temperature and high-pressure safety valve

Abstract

The invention relates to a high-performance, high-temperature and high-pressure safety valve. The high-performance, high-temperature and high-pressure safety valve mainly solves the problems that an existing spring full-lift safety valve cannot reach an opening height when a reseating pressure is 95% and above, and the reseating pressure cannot reach 95% and above if the opening height is reached.The high-performance, high-temperature and high-pressure safety valve is characterized in that a vent hole (7) is formed in the upper end of a guide sleeve (6), the vent hole (7) communicates an upper cavity (11) of the valve with an upper chamber (12) of an elastic valve clack (3), and an adjustment valve (8) is arranged on the sidewall of the upper chamber (12) of the elastic valve clack (3); arecoil washer (10) is fixed into a groove (9); and a lower-end inner opening of a recoil disc (5) is a straight opening. According to the high-performance, high-temperature and high-pressure safety valve, the structures of the elastic valve clack, the recoil disc and the guide sleeve are changed, so that the reseating pressure of the valve can reach 97% and above, the elastic valve clack is capable of rapidly reaching the opening height of the valve, the range of the requirement on the rigidity of the spring is expanded, leakage is avoided under a set pressure of 98%, and the higher need of auser can be met.

Description

technical field [0001] The invention relates to a valve, in particular to a high-performance high-temperature and high-pressure safety valve. Background technique [0002] The safety valve is a kind of automatic valve, which is mainly used to control the internal pressure of boilers, pressure vessels, pipelines, etc. not to exceed the specified value, so as to prevent damage to equipment or injury to people due to excessive pressure. Among them, spring full-open safety valves are more common. The safety valve used for medium is also called high temperature and high pressure safety valve. When the medium pressure (internal pressure) rises enough to overcome the spring pre-tightening force, the valve clack will open automatically, and the discharge medium will reduce the internal pressure. Stop the discharge. The main performance parameters of the spring full lift safety valve are displacement and valve reseating pressure. The displacement depends on the diameter of the valv...

AI Technical Summary

Problems solved by technology

Due to the existence of the groove, when the safety valve is opened and returned to the seat, the gas remaining in the groove will form a buffer, so that the elastic valve disc cannot quickly reach the opening height, and at the same time, the elastic valve disc cannot be quickly returned to the seat

2. The impact of the existing recoil disc structure on the performance of the safety valve: the lower inner opening of the existing recoil disc is a 45° oblique opening with a larger outer opening and a smaller inner opening. When the safety valve is opened, the lift of the elastic disc is weakened. The elastic disc cannot reach the opening height quickly, and at the same time, it cannot make the elastic disc return to the seat quickly

4. The lower end surface of the elastic disc is flat. Under high temperature conditions, the lower end of the elastic disc cannot achieve the best deformation ability, which affects the sealing performance between the elastic disc and the valve seat.

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