CN220540398U - Fire-retardant breather valve with negative pressure protection function - Google Patents
Fire-retardant breather valve with negative pressure protection function Download PDFInfo
- Publication number
- CN220540398U CN220540398U CN202121142850.7U CN202121142850U CN220540398U CN 220540398 U CN220540398 U CN 220540398U CN 202121142850 U CN202121142850 U CN 202121142850U CN 220540398 U CN220540398 U CN 220540398U
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- valve
- negative pressure
- valve disc
- breather valve
- pressure protection
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 15
- 239000002131 composite material Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 description 15
- 230000000241 respiratory effect Effects 0.000 description 8
- 210000002345 respiratory system Anatomy 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model provides a fire-retardant breather valve with negative pressure protect function, belongs to storage tank equipment technical field, the breather valve includes the breather valve casing, be equipped with the breather valve cavity in the breather valve casing, the fixed pressure disk seat that is provided with in the bottom of breather valve cavity, the fixed vacuum disk seat that is provided with in top of breather valve cavity, the pressure disk seat top is provided with the pressure valve disc, the vacuum disk seat top is equipped with the vacuum valve disc, one side of breather valve cavity links to each other with the extension pipe, the other end and the flame arrester mounting of extension pipe link to each other, and the bottom of the extension pipe that is close to flame arrester mounting one side is equipped with the negative pressure protection disk seat. According to the utility model, by adding the negative pressure protection system, the problem of negative pressure and overpressure of the storage tank caused by blockage of the fire arrestor hole can be effectively solved.
Description
Technical Field
The utility model belongs to the technical field of storage tank equipment, and particularly relates to a fire-retarding breather valve with a negative pressure protection function.
Background
In the fields of petroleum and chemical industry, the existing storage tank breathing ventilation equipment mainly comprises two parts, namely a fire-retardant breathing valve and an emergency pressure relief access hole. The fire-retardant breather valve has the capability of discharging and sucking, and ensures the pressure balance in the storage tank. The traditional fire-retarding breather valve consists of a fire-retarding device and a breather valve, wherein the installation position of the fire-retarding breather valve is arranged at the top of a storage tank and is positioned at a cold-heat exchange point, and the working temperature of the fire-retarding device is often lower than the ambient temperature and the crystallization temperature of storage tank medium. As the fire-retarding pore of the fire-retarding device only has the diameter of 0.6-1.2 mm, and effective heat preservation and heat tracing cannot be realized, the fire-retarding pore has the phenomena of freezing and bonding, and the fire-retarding breather valve cannot breathe normally. Under the condition that the fire-retardant breather valve cannot breathe normally due to freezing and bonding of the fire-retardant pore, when the positive pressure is superpressure, the emergency pressure relief access hole can be opened to work and discharge pressure; when the negative pressure is over-pressure, no equipment is temporarily arranged on the storage tank to suck and supplement air, and the phenomenon of pumping out the storage tank can be caused.
Disclosure of Invention
Based on the technical problems, in order to prevent the negative pressure and the overpressure of the storage tank caused by the blockage of the fire arrester holes, the utility model provides the fire-arresting respiratory valve with the negative pressure protection function, and the negative pressure and the overpressure of the storage tank caused by the blockage of the fire arrester holes can be effectively solved by adding a negative pressure protection system.
The utility model adopts the following technical scheme:
the utility model provides a fire-retardant breather valve with negative pressure protect function, the breather valve includes the breather valve casing, be equipped with the breather valve cavity in the breather valve casing, be provided with the pressure disk seat in the bottom of breather valve cavity fixedly, be provided with the vacuum valve seat in the top of breather valve cavity fixedly, the pressure disk seat top is provided with the pressure valve disc, the pressure valve disc covers the pressure valve seat top and opens and shuts for the pressure valve seat, the vacuum valve seat top is equipped with the vacuum valve disc, the vacuum valve disc covers the vacuum valve seat top and opens and shuts for the vacuum valve seat, one side of breather valve cavity links to each other with the extension pipe, the other end of extension pipe links to each other with the flame arrester mounting, be equipped with the fire-retardant dish on the flame arrester mounting, be equipped with the negative pressure protection disk seat near the bottom of extension pipe of flame arrester mounting one side, the negative pressure protection disk seat top is equipped with the negative pressure protection valve seat, negative pressure protection covers the negative pressure protection disk seat top and opens and shuts for the negative pressure protection disk seat, the weight of negative pressure protection valve disc is greater than the vacuum valve disc, the closure of vacuum valve disc, pressure valve disc, negative pressure protection valve disc is closed by its own gravity.
Further, a cover plate is arranged on the extension pipe, and the cover plate and the negative pressure protection valve seat are arranged oppositely.
Further, the bottom of the breather valve is provided with a flange.
Further, the pressure valve disc, the vacuum valve disc and the negative pressure protection valve disc are polytetrafluoroethylene composite plates.
Further, a vacuum valve disc guide rod is arranged at the top of the vacuum valve disc, and a groove cavity for the vacuum valve disc guide rod to move is formed in the breather valve shell.
Further, the bottom of the pressure valve disc is provided with a pressure valve disc guide rod, and the breather valve shell is provided with a groove cavity for the pressure valve disc guide rod to move.
Further, the bottom of the negative pressure protection valve disc is provided with a negative pressure protection valve disc guide rod, and the extension pipe is provided with a groove cavity for the negative pressure protection valve disc guide rod to move.
The utility model has the advantages and effects that:
according to the utility model, by adding the negative pressure protection system, the problem of negative pressure and overpressure of the storage tank caused by blockage of the pore of the flame arrester can be effectively solved, and the problem that the breather valve has no negative pressure protection system is solved; the integrated operation of the respiratory system and the negative pressure protection system is realized.
Drawings
FIG. 1 is a schematic diagram of a fire-retardant breather valve with negative pressure protection function according to the present utility model.
The components in the figure: 1-a respiratory valve; 11-a respiratory valve housing; 12-a respiratory valve cavity; 13-a pressure valve seat; 14-pressure valve disc; 15-vacuum valve seat; 16-vacuum valve disc, 17-flange; 2-extension pipes; 3-a negative pressure protection system; 31-cover plate; 32-a negative pressure protective shell; 33-a negative pressure protection valve seat; 34-negative pressure protection valve disc; 35-negative pressure protection guide rod; 4-flame arrestor system; 41-flame arrestor fixture; 42-firestop tray.
Detailed Description
The utility model is further explained below with reference to the drawings and examples.
A fire-retarding breather valve with negative pressure protection function is composed of breather valve, negative pressure protection system and fire retarding system.
The breather valve comprises a breather valve shell and a breather valve cavity, and the breather valve cavity is connected with the breather valve shell through an extension pipe. The breather valve is characterized in that a pressure valve seat is fixed below the breather valve cavity, a pressure valve disc is arranged above the pressure valve seat, a vacuum valve seat is fixed above the breather valve cavity, a vacuum valve disc is arranged above the vacuum valve seat, and the breather valve is fixedly connected with the top of the storage tank through a flange.
The negative pressure protection system comprises a cover plate and a negative pressure protection shell, wherein a negative pressure protection valve seat is arranged at the upper part of the negative pressure protection shell, a negative pressure protection valve disc is arranged on the negative pressure protection valve seat, and the negative pressure protection valve disc moves in the negative pressure protection shell through a negative pressure protection guide rod. The negative pressure protection system is arranged on the extension pipe.
The flame arrester system comprises a flame arrester fixing piece and a flame arrester disk. The fire arrestor fixing piece is arranged on the extension pipe, and the fire arrestor disc is arranged in the fire arrestor fixing piece.
The weight of the pressure valve disc is manufactured according to the relevant specification, the weight of the vacuum valve disc is manufactured according to the relevant specification, the weight of the negative pressure protection valve disc is larger than that of the vacuum valve disc, and the three valve discs are closed by gravity of the three valve discs.
The top of the vacuum valve disc is provided with a vacuum valve disc guide rod, and the breather valve shell is provided with a groove cavity for the vacuum valve disc guide rod to move.
The bottom of the pressure valve disc is provided with a pressure valve disc guide rod, and the breather valve shell is provided with a groove cavity for the pressure valve disc guide rod to move.
Preferably, the vacuum valve disc, the pressure valve disc and the negative pressure protection valve disc are all composed of polytetrafluoroethylene composite plates, and a fixed core body and a limiting hole are arranged in the middle.
Example 1
As shown in fig. 1, a respiratory system is arranged in the respiratory valve cavity 12, the pressure valve seat 13 and the pressure valve disc 14 are mainly used for high-pressure regulation, and because the respiratory valve cavity and the petroleum storage tank are in a communication state, when the air pressure in the petroleum storage tank is higher than the external atmospheric pressure, the pressure valve disc 14 is separated from the pressure valve seat 13 under the driving of the air pressure, so that the air escapes from the extension pipe 2, and when the air pressure value in the petroleum storage tank is smaller than the external atmospheric pressure along with the escape of the high-pressure air, the pressure valve disc 14 and the pressure valve seat 13 are restored to be in a combined state, and the air can not escape through the respiratory system any more.
The vacuum valve seat 15 and the vacuum valve disc 16 are mainly used for low-pressure adjustment, when the air pressure value in the petroleum storage tank is lower than the external atmospheric pressure, the vacuum valve disc 16 and the vacuum valve seat 15 start to be separated, external air can pass through the fire-retardant disc 42 and enter the breathing valve cavity 12, so that the air pressure in the petroleum storage tank is supplemented, when the air pressure in the petroleum storage tank is restored to the external atmospheric pressure, the vacuum valve disc 16 and the vacuum valve seat 15 are restored to be in a combined state, and external air can not enter the petroleum storage tank through the breathing system .
In this extension pipe 2, a fire arrestor system 4 is added, so as to ensure the fire protection requirements of the gas exhaled and inhaled by the tank body.
When the fire-retardant disk 42 in the fire-retardant system 4 is blocked and fails, external air cannot enter and exit the petroleum storage tank through the respiratory system, at the moment, in order to ensure that the safety respiratory valve continues to work, the negative pressure protection system 3 is additionally arranged, when the air pressure value in the petroleum storage tank is lower than the external atmospheric pressure, due to the blocking and failure of the fire-retardant disk 42, when the air pressure value in the petroleum storage tank is lower than the external atmospheric pressure, the negative pressure protection valve disk 34 and the negative pressure protection valve seat 33 start to separate, external air can enter the petroleum storage tank through the extension pipe 2 into the respiratory valve cavity 12, and then the vacuum valve disk 16 and the vacuum valve seat 15 start to separate, so that the external air can enter the petroleum storage tank to supplement air pressure, when the air pressure in the petroleum storage tank is restored to the external atmospheric pressure, the vacuum valve disk 16 and the vacuum valve seat 15 restore to be in a combined state, and the external air can not enter the petroleum storage tank through the respiratory system any more.
Claims (6)
1. A fire-retardant breather valve with negative pressure protect function, its characterized in that: the breather valve comprises a breather valve housing (11), wherein a breather valve cavity (12) is arranged in the breather valve housing (11), a pressure valve seat (13) is fixedly arranged at the bottom of the breather valve cavity (12), a pressure valve disc (14) is arranged at the top of the breather valve cavity (12), the pressure valve disc (14) covers the top of the pressure valve seat (13) and is opened and closed relative to the pressure valve seat (13), a vacuum valve disc (16) is arranged at the top of the vacuum valve seat (15), the vacuum valve disc (16) covers the top of the vacuum valve seat (15) and is opened and closed relative to the vacuum valve seat (15), one side of the breather valve cavity (12) is connected with an extension pipe (2), the other end of the extension pipe (2) is connected with a flame arrester fixing piece (41), a negative pressure protection valve seat (42) is arranged at the bottom of the extension pipe (2) close to the flame arrester fixing piece (41), a negative pressure protection valve disc (34) is arranged at the top of the vacuum valve seat (34), the negative pressure protection valve disc (34) covers the negative pressure protection valve disc (34) and is opened and closed relative to the vacuum valve seat (34), the vacuum valve disc (16), the pressure valve disc (14) and the negative pressure protection valve disc (34) are closed by gravity of the vacuum valve disc; the bottom of the negative pressure protection valve disc (34) is provided with a negative pressure protection valve disc guide rod, and the extension pipe (2) is provided with a groove cavity for the negative pressure protection valve disc guide rod to move.
2. A fire-blocking breather valve with negative pressure protection function according to claim 1, characterized in that: the extension pipe (2) is provided with a cover plate (31), and the cover plate (31) and the negative pressure protection valve seat (33) are arranged oppositely.
3. A fire-blocking breather valve with negative pressure protection function according to claim 1, characterized in that: the bottom of the breather valve is provided with a flange (17).
4. A fire-blocking breather valve with negative pressure protection function according to claim 1, characterized in that: the pressure valve disc (14), the vacuum valve disc (16) and the negative pressure protection valve disc (34) are polytetrafluoroethylene composite plates.
5. A fire-blocking breather valve with negative pressure protection function according to claim 1, characterized in that: the top of the vacuum valve disc (16) is provided with a vacuum valve disc guide rod, and the breather valve shell (11) is provided with a groove cavity for the vacuum valve disc guide rod to move.
6. A fire-blocking breather valve with negative pressure protection function according to claim 1, characterized in that: the bottom of the pressure valve disc (14) is provided with a pressure valve disc guide rod, and the breather valve shell (11) is provided with a groove cavity for the pressure valve disc guide rod to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121142850.7U CN220540398U (en) | 2021-05-26 | 2021-05-26 | Fire-retardant breather valve with negative pressure protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121142850.7U CN220540398U (en) | 2021-05-26 | 2021-05-26 | Fire-retardant breather valve with negative pressure protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220540398U true CN220540398U (en) | 2024-02-27 |
Family
ID=89963608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121142850.7U Active CN220540398U (en) | 2021-05-26 | 2021-05-26 | Fire-retardant breather valve with negative pressure protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220540398U (en) |
-
2021
- 2021-05-26 CN CN202121142850.7U patent/CN220540398U/en active Active
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