CN216590109U

CN216590109U - Fire-retardant explosion venting valve

Info

Publication number: CN216590109U
Application number: CN202123364756.9U
Authority: CN
Inventors: 李中源; 何升宝; 廖精华; 辛爱琴; 何升榕
Original assignee: Fujian Aierpu Environmental Protection Co ltd
Current assignee: Fujian Aierpu Environmental Protection Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-24
Anticipated expiration: 2031-12-30

Abstract

The application provides a back-fire relief is let out and is exploded valve, back-fire relief is let out and is exploded the valve and install on getting into the pipeline before the VOCs treatment facility, in case when VOCs treatment facility takes place to explode, can effectual prevention tempering and realize directional pressure release, protection pipeline upstream equipment and personnel's safety.

Description

Fire-retardant explosion venting valve

Technical Field

The application relates to a valve, especially relates to a fire-retardant explosion venting valve.

Background

The mode of thermal storage type thermal oxidation system (RTO), catalytic combustion system (RCO/CO) etc. purifying VOCs tail gas in the form of thermal oxidation is widely used in industrial enterprises, and it has advantages such as treatment effeciency height, operation energy consumption are low. Because VOCs is combustible gas, has inflammable and explosive's characteristic, when it heats the burning in equipment, has the potential risk of taking place the detonation, consequently, all be provided with various passive safety protection accessories such as back-fire relief device, explosion venting device with the treatment facility of thermal oxidation form to guarantee the safety of personnel and equipment when the occurence of failure. In the actual operation process, because adopt inclosed pipeline to be connected between processing equipment and the VOCs emission source, in case processing equipment takes place the detonation, though equipment itself can reach directional pressure release protection's effect, the high atmospheric pressure that the explosion produced in the twinkling of an eye falls back to VOCs emission source department through the pipeline easily, causes the secondary to destroy. Therefore, a device that can effectively prevent the airflow from falling back is necessary.

Disclosure of Invention

The application provides a fire-retardant explosion venting valve, it is installed on the pipeline before getting into equipment, when equipment takes place the detonation, can effectual prevention equipment tempering and realize directional pressure release, protection upstream equipment and personnel's safety.

In order to achieve the above object, the technical solution of the present application is as follows.

A fire-retardant explosion-venting valve comprises a box body, a fire arrestor, a check device and an explosion-venting valve, wherein the inside of the box body is sequentially provided with the fire arrestor, the check device and the explosion-venting valve according to the airflow direction, the box body comprises an air inlet, an air outlet, a fire arrestor mounting opening and an explosion-venting valve mounting opening, the box body is formed by welding steel plates, the air inlet is vertically penetrated and arranged in the central position on the left side of the box body, the air outlet is vertically penetrated and arranged in the central position on the right side of the box body, the fire arrestor mounting opening is positioned at the top of the box body and is close to the position of the air inlet, the fire arrestor is penetrated and arranged in the fire arrestor mounting opening and is fixed by a plurality of bolts and a first nut, the explosion-venting valve mounting opening is positioned at the top of the box body and is close to the position of the air outlet, the explosion-venting valve is arranged at the explosion-venting valve mounting opening and is fixed by a plurality of bolts and a second nut, the check device is arranged between the fire arrestor mounting opening and the explosion-venting valve mounting opening, comprises a valve seat fixing plate, a valve seat, a valve plate, a rotating shaft and a bearing with a seat.

Furthermore, a fixed plate is annularly arranged at each of the front end and the rear end of the flame arrester and welded on the inner wall of the box body, and a hole is formed in the middle of the fixed plate and can be used for airflow to pass through.

Furthermore, the valve seat fixing plate is welded on the inner wall of the box body and provided with a center hole, the valve seat penetrates through the center hole of the valve seat fixing plate, one end of the valve seat fixing plate is flush with the valve seat fixing plate, the other end of the valve seat fixing plate is a valve port with an oblique notch structure, the valve plate is welded and fixed on the rotating shaft and used for plugging the valve port, the bearing with the seat is arranged in the middle position above two sides of the box body, and the rotating shaft penetrates through the shaft with the seat.

The beneficial effect of this application does: the fire-retardant explosion-venting valve has the functions of fire retardance, non-return and explosion venting, and when the rear end of the valve explodes, the valve can rapidly cut off an air flow channel and directionally release pressure, so that air flow is prevented from flowing back to the front end through a pipeline, and the damage influence of accidents is reduced.

Drawings

Fig. 1 is a schematic structural view (front view) of the present application.

Fig. 2 is a left side view of the present application.

Fig. 3 is a top view of the present application.

Fig. 4 is a schematic view of the application 8 in a non-return condition.

The names of the components in the figure are identified as follows: 1. a box body; 2. a flame arrestor; 3. a non-return device; 4. an explosion venting valve; 5. a fixing plate; 6. a valve seat fixing plate; 7. a valve seat; 8. a valve plate; 9. a rotating shaft; 10. a pedestal bearing; 11. a first bolt and a first nut; 12. a bolt and a nut II; A. an air inlet; B. an air outlet; C. a flame arrestor mounting port; D. and (4) an explosion venting valve mounting port.

Detailed Description

The present application is further described with reference to the following examples in conjunction with the accompanying drawings.

As shown in fig. 1 and 3, the fire-retardant explosion-venting valve provided by the application comprises a box body 1, a flame arrester 2, a check device 3 and an explosion-venting valve 4 which are sequentially arranged in the box body according to the airflow direction, wherein the box body 1 comprises an air inlet A, an air outlet B, a flame arrester mounting port C and an explosion-venting valve mounting port D, the box body 1 is formed by welding steel plates, the air inlet A vertically penetrates through the left central position of the box body 1, the air outlet B vertically penetrates through the right central position of the box body 1, the flame arrester mounting port C is positioned at the top of the box body 1 and is close to the air inlet A, the flame arrester 2 penetrates through the flame arrester mounting port C and is fixed with a first nut 11 by a plurality of bolts, the explosion-venting valve mounting port D is positioned at the top of the box body 1 and is close to the air outlet B, the explosion-venting valve 4 is arranged at the explosion-venting valve mounting port D and is fixed with a second nut 12 by a plurality of bolts, the check device 3 is arranged between the flame arrester mounting port C and the explosion-venting valve mounting port D, comprises a valve seat fixing plate 6, a valve seat 7, a valve plate 8, a rotating shaft 9 and a bearing with a seat 10.

Specifically, as shown in fig. 1, the front end and the rear end of the flame arrester are respectively provided with a fixing plate 5 in a ring shape, the fixing plates 5 are welded on the inner wall of the box body, and a hole is formed in the middle of the fixing plates and can allow air to pass through.

Specifically, as shown in fig. 1 and 3, the valve seat fixing plate 6 is welded on the inner wall of the box body 1 and is provided with a center hole, the valve seat 7 penetrates through the center hole of the valve seat fixing plate 6, one end of the valve seat fixing plate is flush with the valve seat fixing plate 6, the other end of the valve seat fixing plate is a valve port with an oblique-notch structure, the valve plate 8 is welded and fixed on the rotating shaft 9 and is used for plugging the valve port, the rotating shaft 9 penetrates through the middle position above two sides of the box body 1, and the bearing 10 with a seat is sleeved on the rotating shaft 9.

Specifically, under the condition that the fire-retardant explosion-venting valve does not work, as shown in fig. 1, the valve plate 8 is in a vertically downward position, and enough space is formed between the valve plate 8 and the valve seat 7 of the inclined cut for air to pass through; under the condition of normal work, waste gas enters the box body 1 from the gas inlet A, passes through the flame arrester 2 and the non-return device 3, then flows out of the box body 1 from the gas outlet B and then enters subsequent waste gas treatment equipment; when the waste gas treatment equipment at the rear end explodes, as shown in fig. 4, the valve plate 8 is impacted by reverse airflow, so that the valve plate is tightly attached to the valve seat 7 to play a role in non-return, a small part of gas which passes through the flame arrester to prevent backfire, meanwhile, the pressure in the box body 1 instantly rises and exceeds the designed pressure value of the explosion venting valve, and the explosion venting valve is opened to release pressure.

It should be noted that the above-mentioned embodiments are only examples of the present application and are not intended to limit the scope of the claims of the present application, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. The fire-retardant explosion-venting valve is characterized by comprising a box body (1), a fire arrester (2), a check device (3) and an explosion-venting valve (4), wherein the fire arrester (2), the check device and the explosion-venting valve (3) are sequentially arranged in the box body according to the airflow direction, the box body (1) comprises an air inlet (A), an air outlet (B), a fire arrester mounting port (C) and an explosion-venting valve mounting port (D), the box body (1) is formed by welding steel plates, the air inlet (A) vertically penetrates through the left central position of the box body (1), the air outlet (B) vertically penetrates through the right central position of the box body (1), the fire arrester mounting port (C) is positioned at the top of the box body (1) and is close to the position of the air inlet (A), the fire arrester mounting port (C) penetrates through the fire arrester mounting port (2) and is fixed with a first nut (11) by a plurality of bolts, and the explosion-venting valve mounting port (D) is positioned at the top of the box body (1) and is close to the position of the air outlet (B), let out explode valve (4) install in let out explode valve installing port (D) and fixed with a plurality of bolts and nut two (12), non return device (3) set up in spark arrester installing port (C) with let out explode between the valve installing port (D), including disk seat fixed plate (6), disk seat (7), valve plate (8), pivot (9), area seat bearing (10).

2. A fire and explosion relief valve as claimed in claim 1, wherein the fire arrestor (2) is provided with a fixing plate (5) at each of the front and rear ends thereof, the fixing plates (5) are welded to the inner wall of the tank (1), and a hole is provided in the middle thereof for airflow to pass through.

3. A fire and explosion relief valve as claimed in claim 1, wherein the valve seat fixing plate (6) is welded to the inner wall of the box (1) and has a central hole, the valve seat (7) is inserted into the central hole of the valve seat fixing plate (6), one end of the valve seat fixing plate is flush with the valve seat (7) fixing plate, the other end of the valve seat fixing plate is a valve port with an inclined notch structure, the valve plate (8) is welded and fixed to the rotating shaft (9) and is used for blocking the valve port, the seated bearing (10) is disposed at the middle position above the two sides of the box (1), and the rotating shaft (9) is inserted into the seated bearing (10).