CN2182316Y

CN2182316Y - Spring safety valve

Info

Publication number: CN2182316Y
Application number: CN 93204748
Authority: CN
Inventors: 邱培霖; 颜合臬; 郭晓春; 杨亚敏
Original assignee: Hubei Boiler And Pressure Vessel Inspection And Research Institute; CHINA WUHUAN CHEMICAL ENGINEERING Co
Current assignee: Hubei Boiler And Pressure Vessel Inspection And Research Institute; CHINA WUHUAN CHEMICAL ENGINEERING Co
Priority date: 1993-02-23
Filing date: 1993-02-23
Publication date: 1994-11-09
Anticipated expiration: 2003-02-23

Abstract

The utility model relates to a novel spring type safety valve. The novel spring type safety valve is composed of a valve body, a valve clack, a valve rod, spring seats, a spring, an inner spring sleeve, an outer spring sleeve, etc. The inner spring sleeve and the outer spring sleeve which are clung to the spring are arranged on the spring seats on two ends of the spring. When the spring fractures, the inner spring sleeve and the outer spring sleeve can avoid the phenomenon that the drop and the displacement of the spring occur. The outward leakage of the medium in a pressure vessel can be effectively prevented, and the novel spring type safety valve indeed plays a safety function.

Description

Spring safety valve

The utility model product belongs to the safety relief device class that pressurized container in use prevents superpressure.

Safety relief device is the special arrangement that in use prevents superpressure of pressurized container indispensability, it must guarantee tightly not leak when container is in normal operating pressure, and when in a single day the pressure in the container surpassed the force value of regulation for a certain reason, the medium in the container of can automatically releasing out rapidly remained within the pressure range of permission pressurized container.Safety valve is made up of valve body, valve seat, flap and load maintainer usually.When the pressure in the container was within the authorized pressure scope, interior pressure was applied to load on the flap to the active force of flap less than load maintainer, has sealing force between flap and the valve seat, and safety valve is in closed condition.When the pressure in the container surpassed the force value of regulation, interior pressure was pushed up flap from valve seat the active force of flap, and safety valve is opened, and the medium in the container is discharged by the valve seat mouth.After the discharge unit medium, the pressure in the container reduces, and safety valve cuts out again.Spring is the most frequently used load maintainer.Existing Direct spring loaded safety valve promptly takes place after the spring fracture in a single day to misplace or come off, thereby has lost the load that should be added on the flap owing to there is not protective gear, and under the effect of container inner medium pressure, safety valve will open by mistake and open, and cause the medium in the container to leak in a large number.Leak for poisonous, inflammable, explosive medium, its consequence is hardly imaginable.The domestic accident that the fracture of liquefied petroleum gas tank vehicle safety valve spring once repeatedly took place is seriously leaked the liquefied petroleum gas (LPG) in the tank car, causes obstruction to traffic, and evacuating personnel, even lead to fire.

The purpose of this utility model is intended to design a kind of novel spring type safety valve, and the basic structure of former valve is not changed, and only spring is increased protective gear; do not change the performance and the discharge capacity of former valve; can prevent the dislocation after the spring breakage, come off, play safety effect really.

The purpose of this utility model realizes that in the following manner the novel spring type safety valve is made up of valve body 5, flap 2, valve rod 6, spring 8, spring seat 7,11.The weldering or the inner and outer sleeves 9,10 of the spring that closely cooperates on the spring seat 7,11 of both ends of the spring, or spring seat and inner and outer sleeves are processed as one.

Accompanying drawing adopts the enforcement illustration of the utility model structure for the built-in spring safety valve of following guiding type.

With reference to accompanying drawing, 1 safety cover, 3 sealing gaskets, 4 valve seats, 12 packing rings, 13 nuts among the figure.On the spring seat 7,11 at spring 8 two ends, be provided with the inner and outer sleeves of spring, leave the gap that spring can freely be stretched between sleeve and the spring.When spring breakage, inner and outer sleeves 9,10, it is constant that spring is held its shape, thereby do not come off, and inconsistent phenomenon can prevent effectively that the medium in the pressurized container from leaking, and plays safety effect really.

The accident of liquefied petroleum gas tank vehicle safety valve spring fracture once took place in Wuhan, and the liquefied petroleum gas (LPG) in the tank car is seriously leaked.Install inner and outer sleeves on the safety valve that boilers and pressure vessel Inspection Research place, Hubei Province spring has ruptured, constitute the utility model structure, confirm through test of many times, this safety valve can prevent effectively that the medium in the container from leaking.

The utility model is applicable to various forms of Direct spring loaded safety valves.

Claims

1, the novel spring type safety valve is by valve body (5), flap (2), valve rod (6), spring seat (7), (11), spring (8) is formed, and it is characterized in that: the inner and outer sleeves (9), (10) that are welded with spring on the spring seat (7) of both ends of the spring, (11).

2, safety valve according to claim 1, inner and outer sleeves (9), (10) of the spring that it is characterized in that closely cooperating on the spring seat (7), (11) at spring.

3, safety valve according to claim 1 is characterized in that spring seat (7), (11) are processed as one with inside and outside sleeve (9), (10).