CN219493160U

CN219493160U - Combined safety valve applied to pressure vessel

Info

Publication number: CN219493160U
Application number: CN202320346326.4U
Authority: CN
Inventors: 周慧涛; 陈普; 尚成文; 张康成; 郝瑞钊
Original assignee: Shijiazhuang Enric Gas Equipment Co Ltd
Current assignee: Shijiazhuang Enric Gas Equipment Co Ltd
Priority date: 2023-03-01
Filing date: 2023-03-01
Publication date: 2023-08-08
Anticipated expiration: 2033-03-01

Abstract

Be applied to pressure vessel's combination relief valve, belong to pressure vessel relief valve technical field, including spring type relief valve, terminal surface and pressure vessel junction are equipped with the rupture disk holder under the spring type relief valve, are equipped with central rupture disk mounting port in the central axis position on the rupture disk holder, use central axis as central circumference evenly distributed 3-5 peripheral rupture disk mounting ports on the rupture disk holder, the rupture disk is installed to peripheral rupture disk mounting port and central rupture disk mounting port, with the help of bolted connection at spring type relief valve terminal surface and pressure vessel junction down, the rupture disk burst pressure is greater than spring setting pressure of spring type relief valve. The risk of false explosion of the pressure vessel is improved, the loss of medium discharged to the atmosphere and precious medium is avoided, and the safety and the economy are greatly improved.

Description

Combined safety valve applied to pressure vessel

Technical Field

The utility model belongs to the technical field of pressure vessel safety valves, and particularly relates to a combined safety valve applied to a pressure vessel.

Background

The safety valve is an important safety component of the pressure container, and when the pressure in the container exceeds a specified value, the safety device can act to discharge the overpressure medium in the container, reduce the pressure of the container and ensure the safety of storage and transportation of the container. The safety device commonly used for pressure vessels is a safety valve or rupture disk, typically a single safety device alone.

When the container is only provided with a safety valve, for some chemicals with higher or more precious environmental damage, when the safety valve acts, the medium can be directly discharged to the atmosphere, so that the medium is greatly damaged or wasted. In addition, because the safety valve is in direct contact with the medium, when the medium has strong corrosiveness, leakage of parts of the safety valve is easy to occur due to corrosion, and danger is generated.

When the container is only provided with the rupture disk, not only is the condition that the medium is directly discharged to the atmosphere to cause pollution or medium loss, but also the possibility of false explosion exists. The traditional rupture disk is deformed due to medium pressure fluctuation when in use, so that the performance of the traditional rupture disk is reduced, and the traditional rupture disk cannot be accurately blasted, so that false explosion occurs, and loss is caused.

Therefore, for some medium storage and transportation containers with larger or more precious hazard, a combined safety device for combining a safety valve and a rupture disk is needed, so that the safety use of the container is ensured, the reliability of the device is also improved, and meanwhile, the medium is prevented from being directly discharged to the atmosphere as much as possible.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a combined safety valve applied to a pressure container, which improves the risk of false explosion of the pressure container by improving the structure of a rupture disk, avoids the loss of medium discharge to the atmosphere and precious medium, and greatly improves the safety and the economy.

The technical scheme adopted by the utility model is as follows: be applied to pressure vessel's combination relief valve, including spring type relief valve, be equipped with the rupture disk holder in the terminal surface and pressure vessel junction under the spring type relief valve, the central axis position on the rupture disk holder is equipped with central rupture disk installing port, uses central axis as central circumference evenly distributed 3-5 peripheral rupture disk installing ports on the rupture disk holder, peripheral rupture disk installing port and central rupture disk installing port install the rupture disk, with the help of bolted connection at spring type relief valve terminal surface and pressure vessel junction under, the rupture disk blasting pressure is greater than spring setting pressure of spring type relief valve.

Further, a fusible alloy support and a matched fusible alloy plug are arranged at the positions of the peripheral rupture disk mounting opening and the central rupture disk mounting opening and above the rupture disk.

Further, a recovery pipeline connector and a connection port of a pressure gauge are arranged at the upper end of the valve body of the spring type safety valve, a protection cover is arranged at the upper end of the valve body of the spring type safety valve, and the recovery pipeline connector is connected with a recovery container.

The utility model has the beneficial effects that: the combined safety device avoids the direct contact between the spring type safety valve and the medium, reduces the corrosion and the leakage possibility. In special cases (except fire and the like), the rupture disk breaks but the safety valve is not opened, and the medium can be collected through the recovery pipeline, so that the problem of boosting in the tank is solved, the loss of the medium discharged to the atmosphere and precious medium is avoided, and the safety and the economy are greatly improved. The porous mounting mode of the rupture disc holder reduces the possibility of rupture disc false explosion, and the fusible alloy plug in the further improved scheme further reduces the possibility of rupture disc false explosion, so that the device has wide applicability.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

Referring to fig. 1, the combined safety valve applied to the pressure vessel comprises a spring type safety valve, wherein a rupture disc holder 1 is arranged at the joint of the lower end face of the spring type safety valve and the pressure vessel, a central rupture disc mounting port 1-1 is arranged at the central axis position on the rupture disc holder 1, 3-5 peripheral rupture disc mounting ports 1-2 are uniformly distributed on the rupture disc holder 1 circumferentially by taking the central axis as the center, the rupture disc 2 is mounted on both the peripheral rupture disc mounting ports 1-2 and the central rupture disc mounting port 1-1, and the bursting pressure of the rupture disc 2 is greater than the spring setting pressure of the spring type safety valve.

And fusible alloy supports 3-1 and matched fusible Rong Gejin plugs 3-2 are arranged at the positions of the peripheral rupture disc mounting openings 1-2 and the central rupture disc mounting opening 1-1 and above the rupture disc 2. The lower end face of the spring type safety valve is connected with the middle of the rupture disc holder 1 through bolts, and meanwhile, the fusible alloy is filled in holes of the fusible alloy holder 3-1, and the fusible alloy is cooled to form a fusible alloy plug 3-2. The fusible alloy plug 3-2 can give a certain supporting effect on the back of the rupture disk 2, so that the rupture disk 2 is reduced from being subjected to alternating load, and the micro-deformation, fatigue damage and false explosion possibility of the rupture disk 2 are further reduced. Meanwhile, because the melting point of the fusible alloy is low, when the safety device acts, the fusible alloy can be quickly melted, and a discharge channel is left, so that the medium can be smoothly and safely discharged.

The upper end of the valve body of the spring type safety valve is provided with a recovery pipeline connector 4-3 and a connection port 4-1 of a pressure gauge, the upper end of the valve body of the spring type safety valve is provided with a protection cover 4-2, and the recovery pipeline connector 4-3 is connected with a recovery container.

In actual use, the action pressure of the rupture disc 2 is higher than that of the spring type safety valve (generally not more than 1.1 times of the action pressure of the spring type safety valve), so that the pressure bearing capacity of the rupture disc 2 is higher, the safety of a tank body can be improved, and the frequent starting of the spring type safety valve caused by pressure fluctuation or manufacturing errors when the spring type safety valve is independently installed can be avoided. When the tank is heated or otherwise brought to a pressure rise and reaches the operating pressure of the rupture disk 2, the rupture disk 2 ruptures first and the tank medium enters the intermediate chamber between the spring type relief valve and the rupture disk. At this time, the valve at the recovery pipeline (pressure gauge pipe) of the middle cavity is opened due to pressure difference change, the medium entering the middle cavity is recovered into the recovery container through the pipeline, and the pressure in the tank is released (after the pressure is released, the pressure in the tank is still smaller than the action pressure of the spring type safety valve, and the safety valve is not opened). Meanwhile, the pressure gauge value of the safety device changes, and related personnel are reminded that the state of the rupture disk is changed. If special conditions are met, such as fire, after the rupture disk 2 acts, the pressure in the tank can not be effectively released, the pressure is higher than the action pressure of the safety valve, the safety valve is opened, redundant media and pressure are discharged, and the safety of equipment is ensured. When the spring type safety valve acts, the discharged medium is harmless and low in value, and can directly discharge the air; if the medium hazard is larger or the value is higher, the medium can be recovered to the recovery container by the external pipeline connected with the recovery pipeline interface 4-3 on the spring type safety valve, thereby ensuring the safety and avoiding the loss of the medium.

Claims

1. Be applied to pressure vessel's combination relief valve, including spring type relief valve, its characterized in that: the explosion protection device is characterized in that a rupture disc holder (1) is arranged at the joint of the lower end face of the spring type safety valve and the pressure vessel, a central rupture disc mounting opening (1-1) is arranged at the central axis position on the rupture disc holder (1), 3-5 peripheral rupture disc mounting openings (1-2) are uniformly distributed on the rupture disc holder (1) circumferentially by taking the central axis as the center, rupture discs (2) are mounted at the peripheral rupture disc mounting openings (1-2) and the central rupture disc mounting opening (1-1), and the bursting pressure of the rupture discs (2) is greater than the spring setting pressure of the spring type safety valve.

2. The combination safety valve of claim 1, wherein: and fusible alloy supports (3-1) and matched fusible Rong Gejin plugs (3-2) are arranged at the positions of the peripheral rupture disc mounting openings (1-2) and the central rupture disc mounting opening (1-1) and above the rupture disc (2).

3. The combination safety valve of claim 1, wherein: the upper end of the valve body of the spring type safety valve is provided with a recovery pipeline connector (4-3) and a connection port (4-1) of a pressure gauge, the upper end of the valve body of the spring type safety valve is provided with a protective cover (4-2), and the recovery pipeline connector (4-3) is connected with a recovery container.