Fire-retardant pressure relief device
By designing a fire-retardant pressure relief device, high-pressure gas is used to impact the blind holes of the piston disk and the guide rod, push the top piston disk to open, and quickly release pressure through the hollow area, solving the problem of discontinuous pressure relief in the prior art, and achieving the stability of the internal pressure of the explosion-proof chamber.
Patent Information
- Application Number
- CN202421281894.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In the prior art, the piston disc opening threshold is high, resulting in an initial delay in pressure relief, and the pressure relief is interrupted when the pressure drops, resulting in discontinuous pressure relief process and unstable pressure inside the explosion-proof chamber.
A fire-retardant pressure relief device is designed. By providing a fire-retardant assembly at one end of the fire-retardant housing and a pressure relief valve at the other end, it includes a body of the central through-hole, a piston plate and a guide column. A spring is arranged between the guide column and the body. There is a hollow area around the body, and a blind hole is opened to one end of the guide column facing the fire-retardant assembly. The device uses high-pressure gas to impact the blind holes of the piston disk and the guide rod, push the top piston disk to open, and quickly release pressure through the hollow area, reducing the pressure threshold for the piston disk opening and improving the continuity of pressure relief.
It realizes rapid response and continuous pressure relief based on fire resistance, lowers the pressure threshold for the piston disk opening, avoids repeated opening and closing, improves the adjustment accuracy of pressure balance, and improves the stability of the internal pressure of the explosion-proof chamber.
Smart Images
Figure CN222677057U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proofing, in particular to a fire-blocking and pressure-relieving device. Background Art
[0002] At present, during the use of some power equipment, such as power supply equipment and energy storage equipment, there are batteries inside. When working, the battery pack will heat up, causing the internal pressure to rise, resulting in an imbalance in the pressure difference between the inside and outside of the explosion-proof cavity where the battery pack is stored, which may cause damage to its internal structure. In addition, in some working conditions, such as coal mines, metal mines, chemical sites, etc., there are a large number of flammable substances in the environment. The explosion-proof device of the explosion-proof cavity needs to have a pressure relief function while preventing the flame generated by the explosion inside the explosion-proof cavity from spreading to the outside of the explosion-proof cavity and igniting the flammable substances in the environment.
[0003] In the prior art, mechanical explosion-proof doors or explosion-proof valves with piston discs are generally used for passive pressure relief. When the pressure inside the explosion-proof chamber accumulates to the opening threshold of the piston disc, the piston disc opens the pressure relief hole to relieve pressure. However, in the prior art, the opening threshold of the piston disc is relatively high, resulting in a delay in the initial stage of pressure relief. When the pressure inside the explosion-proof chamber drops, the pressure relief is interrupted in advance. When the accumulated pressure inside the explosion-proof chamber is higher than the opening threshold of the piston disc, the piston disc is opened again to relieve pressure. As a result, the piston disc is repeatedly opened and closed during the pressure relief process, making it difficult to release the internal pressure continuously, resulting in unstable pressure inside the explosion-proof chamber. Utility Model Content
[0004] The utility model aims to provide a fire-blocking and pressure-relieving device, which reduces the pressure threshold of the opening of the piston disc and improves the continuity of the pressure-relieving process on the basis of achieving fire blocking.
[0005] To achieve the above object, the technical solution adopted by the utility model is: a fire-blocking and pressure-relieving device, comprising: a fire-blocking housing, a fire-blocking assembly arranged at one end of the fire-blocking housing, and a pressure-relieving valve arranged at the other end of the fire-blocking housing;
[0006] The pressure relief valve includes: a body with a through hole in the center, a piston disc and a guide column located on the side of the body opposite to the fire-blocking component, one end of the guide column embedded in the through hole of the body is connected to the piston disc, a spring is arranged between the other end of the guide column and the body, the body has a plurality of hollow areas around the through hole, and a blind hole is opened at one end of the guide column facing the fire-blocking component.
[0007] The further improved scheme in the above technical scheme is as follows:
[0008] 1. In the above scheme, a first filter is provided at the end of the fire-blocking assembly opposite to the pressure relief valve, and a second filter is provided between the fire-blocking assembly and the pressure relief valve.
[0009] 2. In the above solution, the diameter of the holes of the second filter is smaller than the diameter of the holes of the first filter.
[0010] 3. In the above solution, the main body and the fireproof cover shell are sealed and connected by a sealing ring.
[0011] 4. In the above solution, the number of the hollow areas is 3 to 6.
[0012] 5. In the above solution, the main body and the fireproof cover shell are connected by threads.
[0013] 6. In the above solution, the periphery of the through hole of the main body has a flange, and the guide column is embedded in the flange.
[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:
[0015] 1. The utility model fire-blocking and pressure-relief device has one end of a guide column embedded in a through hole of a body connected to a piston disc, a spring is arranged between the other end of the guide column and the body, the body is provided with a plurality of hollow areas around the through hole, and a blind hole is opened at one end of the guide column facing the fire-blocking component, and the high-pressure gas behind the fire-blocking component impacts the blind holes on the piston disc and the guide rod, and jointly pushes the piston disc to open and quickly release pressure through the hollow area, while achieving fire blocking, reducing the pressure threshold for opening the piston disc, increasing the response speed of the opening of the piston disc, enabling rapid pressure relief, avoiding the situation where the piston disc is repeatedly opened and closed during the pressure relief process, improving the adjustment accuracy of the pressure balance, improving the continuity of the pressure relief process, and being conducive to improving the stability of the pressure inside the explosion-proof chamber.
[0016] 2. The utility model fire-blocking and pressure relief device has a first filter screen at the end of the fire-blocking component opposite to the pressure relief valve, and a second filter screen is provided between the fire-blocking component and the pressure relief valve; the diameter of the holes of the second filter screen is smaller than the diameter of the holes of the first filter screen, and the first filter screen and the second filter screen are used for filtering on both sides of the fire-blocking component, and the gas ejected from the explosion-proof cavity is coarsely screened by the first filter screen and then enters the fire-blocking component, and then is finely screened by the second filter screen, thereby greatly reducing the debris ejected during the pressure relief process on the basis of achieving multiple filtrations, improving the overall filtering effect, and avoiding the situation where the piston disc is stuck by the debris, thereby ensuring the stability of the pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Attached Figure 1 This is a schematic diagram of the overall structure of the fire-blocking and pressure-relieving device of the utility model;
[0018] Attached Figure 2 It is a partial cross-sectional stereoscopic view of the fire-blocking and pressure-relieving device of the utility model;
[0019] Attached Figure 3It is a schematic diagram of the structural decomposition of the fire-blocking and pressure-relieving device of the utility model.
[0020] In the above drawings: 1. Fireproof cover shell; 2. Pressure relief valve; 201. Main body; 202. Through hole; 203. Piston disc; 204. Guide column; 3. Fire-blocking assembly; 4. Spring; 5. Hollow area; 6. Blind hole; 7. First filter screen; 8. Second filter screen; 9. Sealing ring; 10. Flange. DETAILED DESCRIPTION
[0021] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.
[0022] Embodiment 1: A fire-blocking and pressure-relieving device, comprising: a fire-blocking housing 1, a fire-blocking assembly 3 disposed at one end of the fire-blocking housing 1, and a pressure-relieving valve 2 disposed at the other end of the fire-blocking housing 1;
[0023] When in use, the high-pressure gas carrying the flame in the explosion-proof cavity enters the interior of the fireproof cover shell, and pushes the piston disc and guide column of the pressure relief valve after passing through the fire-blocking component. The gas enters the blind hole of the guide column and jointly pushes the piston disc to compress the spring, so that the piston disc moves through the hollow area for rapid pressure relief, which is conducive to reducing the pressure threshold requirement for opening the piston disc.
[0024] The pressure relief valve 2 includes: a body 201 with a through hole 202 in the center, a piston disc 203 and a guide column 204 located on the side of the body 201 opposite to the fire-blocking component 3, one end of the guide column 204 embedded in the through hole 202 of the body 201 is connected to the piston disc 203, and a spring 4 is arranged between the other end of the guide column 204 and the body 201, the body 201 has a plurality of hollow areas 5 around the through hole 202, and a blind hole 6 is opened at one end of the guide column 204 facing the fire-blocking component 3.
[0025] When the pressure in the flameproof chamber rises, the piston disc can respond quickly to connect the hollow area with the outside to relieve pressure. When the pressure in the flameproof chamber drops, it is beneficial to keep the piston disc open continuously, avoiding the situation where the piston disc is repeatedly opened and closed during the pressure relief process.
[0026] A first filter screen 7 is provided at one end of the fire-blocking component 3 opposite to the pressure relief valve 2, and a second filter screen 8 is provided between the fire-blocking component 3 and the pressure relief valve 2; the first filter screen and the second filter screen are used to filter on both sides of the fire-blocking component, so that the ejected gas can be filtered multiple times, which not only reduces the situation where large particles carried by the internal ejected gas clog the fire-blocking component, but also reduces the situation where internal debris is ejected and injures people during the pressure relief process, and also reduces the risk that the ejected debris will jam the piston disc and cause the piston disc to fail to close normally, thereby improving the overall safety and reliability;
[0027] The diameter of the holes of the second filter 8 is smaller than the diameter of the holes of the first filter 7. The gas ejected from the explosion-proof chamber is coarsely screened by the first filter before entering the flame-blocking assembly, and then finely screened by the second filter. This greatly reduces the debris ejected during the pressure relief process while achieving multiple filtrations, improves the overall filtering effect, and avoids the situation where the piston disc is stuck by debris, thereby ensuring the stability of the pressure relief.
[0028] The main body 201 is sealed and connected to the fireproof cover shell 1 via a sealing ring 9 .
[0029] The number of the hollow areas 5 is four.
[0030] The through hole 202 of the body 201 has a flange 10 around its periphery, and the guide pillar 204 is embedded in the flange 10 .
[0031] Embodiment 2: A fire-blocking and pressure-relieving device, comprising: a fire-blocking housing 1, a fire-blocking assembly 3 disposed at one end of the fire-blocking housing 1, and a pressure-relieving valve 2 disposed at the other end of the fire-blocking housing 1;
[0032] The high-pressure gas behind the fire-blocking assembly impacts the blind holes on the piston disc and the guide rod, and together pushes the piston disc open to release pressure quickly through the hollow area;
[0033] The pressure relief valve 2 includes: a body 201 with a through hole 202 in the center, a piston disc 203 and a guide column 204 located on the side of the body 201 opposite to the fire-blocking component 3, one end of the guide column 204 embedded in the through hole 202 of the body 201 is connected to the piston disc 203, and a spring 4 is arranged between the other end of the guide column 204 and the body 201, the body 201 has a plurality of hollow areas 5 around the through hole 202, and a blind hole 6 is opened at one end of the guide column 204 facing the fire-blocking component 3.
[0034] On the basis of achieving fire blocking, the pressure threshold for opening the piston disc is lowered, which avoids the repeated opening and closing of the piston disc during the pressure relief process, improves the continuity of the pressure relief process, and is beneficial to improving the stability of the pressure inside the explosion-proof chamber.
[0035] A first filter screen 7 is disposed at one end of the fire-blocking assembly 3 opposite to the pressure relief valve 2 , and a second filter screen 8 is disposed between the fire-blocking assembly 3 and the pressure relief valve 2 .
[0036] The number of the hollow areas 5 is five.
[0037] The main body 201 is connected to the fireproof cover shell 1 through threads.
[0038] The working principle is as follows: when in use, the high-pressure gas carrying the flame in the explosion-proof cavity enters the interior of the fireproof cover shell, and pushes the piston disc and guide column of the pressure relief valve after passing through the fire-blocking component, and the gas enters the blind hole of the guide column, and jointly pushes the piston disc to compress the spring, so that the piston disc moves through the hollow area for rapid pressure relief, which is conducive to reducing the pressure threshold requirement for the piston disc to open;
[0039] During the process of pressure rising in the explosion-proof chamber, the piston disc can respond quickly to connect the hollow area with the outside to relieve pressure. During the process of pressure decreasing in the explosion-proof chamber, it is beneficial to maintain the continuous opening of the piston disc, avoiding the repeated opening and closing of the piston disc during the pressure relief process.
[0040] When the above-mentioned fire-blocking and pressure-relieving device is used, the high-pressure gas behind the fire-blocking component impacts the blind holes on the piston disc and the guide rod, and jointly pushes the piston disc to open and quickly release pressure through the hollow area. On the basis of achieving fire blocking, the pressure threshold for opening the piston disc is reduced, and the response speed of the opening of the piston disc is increased, and the pressure can be quickly released, which avoids the situation where the piston disc is repeatedly opened and closed during the pressure relief process, improves the adjustment accuracy of the pressure balance, improves the continuity of the pressure relief process, and is conducive to improving the stability of the pressure inside the explosion-proof chamber;
[0041] In addition, the first filter and the second filter are used to filter on both sides of the fire-blocking component, so that the ejected gas can be filtered multiple times, which not only reduces the situation where large particles carried by the internal ejected gas block the fire-blocking component, but also reduces the situation where internal debris is ejected and hurts people during the pressure relief process, and also reduces the risk that the ejected debris will jam the piston disc and cause the piston disc to fail to close normally, thereby improving the overall safety and reliability;
[0042] Furthermore, the gas ejected from the explosion-proof chamber is coarsely screened by the first filter and then enters the flame-blocking assembly, and is then finely screened by the second filter. This greatly reduces the debris ejected during the pressure relief process on the basis of multiple filtrations, improves the overall filtration effect, and avoids the situation where the piston disc is stuck by debris, thereby ensuring the stability of the pressure relief.
[0043] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A fire-blocking and pressure-relieving device, characterized in that: include: A fireproof cover shell (1), a fire-blocking assembly (3) being arranged at one end of the fireproof cover shell (1), and a pressure relief valve (2) being arranged at the other end of the fireproof cover shell (1); The pressure relief valve (2) comprises: a body (201) having a through hole (202) at the center, a piston disc (203) and a guide column (204) located on the side of the body (201) opposite to the fire-blocking assembly (3); one end of the guide column (204) embedded in the through hole (202) of the body (201) is connected to the piston disc (203); a spring (4) is arranged between the other end of the guide column (204) and the body (201); the body (201) has a plurality of hollow areas (5) located around the through hole (202); and a blind hole (6) is opened at one end of the guide column (204) facing the fire-blocking assembly (3).
2. The fire-blocking and pressure-relieving device according to claim 1 is characterized in that: A first filter screen (7) is provided at the end of the fire-blocking component (3) opposite to the pressure relief valve (2), and a second filter screen (8) is provided between the fire-blocking component (3) and the pressure relief valve (2).
3. The fire-blocking and pressure-relieving device according to claim 2 is characterized in that: The diameter of the holes of the second filter screen (8) is smaller than the diameter of the holes of the first filter screen (7).
4. The fire-blocking and pressure-relieving device according to claim 1 is characterized in that: The main body (201) is sealedly connected to the fireproof cover shell (1) via a sealing ring (9).
5. The fire-blocking and pressure-relieving device according to claim 1 is characterized in that: The number of the hollow areas (5) is 3 to 6.
6. The fire-blocking and pressure-relieving device according to claim 1 is characterized in that: The main body (201) is connected to the fireproof cover shell (1) via threads.
7. The fire-blocking and pressure-relieving device according to claim 1 is characterized in that: The through hole (202) of the body (201) has a flange (10) around its periphery, and the guide column (204) is embedded in the flange (10).