Sealing structure for exhaust port of explosion-proof valve
Through the combined structure of the bottle mouth-shaped inner sealing groove and dovetail inner sealing ring, the problems of disconnection and leakage of the explosion-proof valve exhaust port are solved, achieving better sealing effect and service life.
Patent Information
- Application Number
- CN202421840088.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The sealing structure of the existing explosion-proof valve exhaust port is prone to the problems of the inner sealing ring being disconnected and leaking when opened, especially the inner sealing ring of the O-shaped structure is prone to be lifted up and adhered to the cover, resulting in a lax seal.
The combination structure of the bottle mouth-shaped inner sealing groove and the dovetail inner sealing ring is adopted. The limit bump is clamped and cooperated with the limiting groove, the top of the dovetail groove is in contact with the cover, and the limit bump and the top are intersected and cleared in different states to ensure the effective limit of the sealing ring when the cover is opened and closed.
It effectively avoids the inner seal ring falling off when the cover is opened, improves the sealing performance, prevents air leakage, and extends the service life of the seal ring.
Smart Images
Figure CN223076211U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proof valves, and particularly to a sealing structure for the exhaust port of an explosion-proof valve. Background Technique
[0002] An explosion-proof valve is a safety device mainly used to prevent a pressure vessel from exploding when the pressure is too high and prevent safety accidents. For example, installing an explosion-proof valve on a battery box is to ensure that during the charging and discharging process of the battery, potential safety risks caused by internal pressure changes or temperature increases are effectively controlled. The specific control process is that when the internal pressure of the battery box reaches the set opening pressure, the explosion-proof valve will open to allow the internal gas to escape, thereby reducing the internal pressure of the battery box. When the pressure drops to the safe range, the explosion-proof valve will automatically close to restore the sealed state.
[0003] When designing the sealing structure at the internal exhaust port of an explosion-proof valve, the most important mechanism is the design of the shape of the internal sealing groove and the internal sealing ring. The prior art often uses the interference fit or clearance fit of the internal sealing groove with a U-shaped structure and the internal sealing ring with an O-shaped structure for sealing. However, when the rubber internal sealing ring is in interference fit with the internal sealing groove, it is prone to large-degree torsional deformation under pressure, resulting in the inability to form an effective sealing line and easy air leakage problems. And when using the interference or excessive fit method, the O-shaped internal sealing ring is prone to jack up and adhere to the lid of the explosion-proof valve. During the process of opening the lid to allow the internal gas to escape, the internal sealing ring will move with the lid and is prone to the problem of ring detachment. Content of the Utility Model
[0004] The utility model provides a sealing structure for the exhaust port of an explosion-proof valve, which can solve the technical problem of easy ring detachment when opening the explosion-proof valve.
[0005] The present application provides the following technical solutions:
[0006] A sealing structure for the exhaust port of an explosion-proof valve includes a lid, an internal sealing groove, and an internal sealing ring embedded in the internal sealing groove. The internal sealing groove as a whole adopts a bottle mouth type structure, including a concave cavity and a limiting port fixedly arranged at the top of the concave cavity. The internal sealing ring as a whole adopts a dovetail type structure, including a sealing ring body and a dovetail groove opened at the top of the sealing ring body. In the state where the lid is closed, the top of the dovetail groove is in double-line contact with the lid. Limiting convex blocks are fixedly arranged on both sides of the sealing ring body, and the limiting convex blocks are located below the limiting port and are in snap-fit with the limiting port.
[0007] Beneficial Effects:
[0008] 1. After the inner sealing ring is embedded into the inner sealing groove of the bottle mouth structure, the limiting port effectively limits the limiting protrusion on the inner sealing ring. When the inner sealing ring moves as the lid is opened, the limiting port restricts the sealing ring body within the concave cavity, preventing the problem of the ring coming off that may occur due to the adhesion between the inner sealing ring and the lid when the lid is opened.
[0009] 2. A dovetail groove is opened at the top of the sealing ring body, so that in the closed state, the sealing ring body at the top position of the dovetail groove is in double-line contact with the lid. Compared with the matching scheme of the inner sealing groove of the U-shaped structure + the inner sealing ring of the O-shaped structure, a double-layer seal is formed between the sealing ring body with the dovetail groove and the lid, which is beneficial to improving the sealing performance of the explosion-proof valve sealing structure and preventing air leakage when the lid is in the closed state.
[0010] Furthermore, as an improvement, the limiting protrusion has a clearance fit with the concave cavity when the lid is open, and an interference fit with the concave cavity when the lid is closed.
[0011] Beneficial effect: The limiting protrusion changes from a clearance fit with the concave cavity to an interference fit when the lid is closed, which is beneficial to offsetting part of the deformation of the inner sealing ring caused by the axial pressure of the lid.
[0012] Furthermore, as an improvement, an arc-shaped tip is fixedly arranged at the bottom of the sealing ring body, and the tip is in single-line contact with the bottom of the concave cavity when the lid is open.
[0013] Beneficial effect: When the lid is in the closed state, the tip changes from single-line contact with the bottom of the concave cavity to surface contact, which is beneficial to offsetting part of the deformation of the inner sealing ring caused by the axial pressure of the lid.
[0014] Furthermore, as an improvement, a limiting arc surface is fixedly arranged on the limiting protrusion, and a clamping arc surface that is clamped and matched with the limiting arc surface is fixedly arranged at the bottom of the limiting port.
[0015] Beneficial effect: Compared with the scheme where the limiting protrusion with a square cross-section is clamped and matched with the limiting port with a square cross-section, it is easier to tear the connection between the limiting protrusion and the sealing ring body during the process of repeatedly opening the lid. This scheme is beneficial to improving the service life of the inner sealing ring through the clamping and matching of the limiting arc surface and the clamping arc surface. Description of the Drawings
[0016] Figure 1 This is a cross-sectional view after hiding the inner sealing ring in the first embodiment of the present utility model;
[0017] Figure 2 It is Figure 1 The enlarged schematic view of part A in
[0018] Figure 3 is Figure 2 an enlarged schematic view of part B in
[0019] Figure 4 is a cross-sectional view of the inner sealing ring in the first embodiment of the present utility model;
[0020] Figure 5 is Figure 4 an enlarged schematic view of part C in Specific Embodiments
[0021] The following is a further detailed description through specific embodiments:
[0022] The reference signs in the accompanying drawings of the specification include: lid 1, inner sealing groove 2, concave cavity 21, limiting opening 22, clamping arc surface 23, inner sealing ring 3, sealing ring body 31, dovetail groove 32, limiting protrusion 33, tip 34, limiting arc surface 35, valve body 4.
[0023] First Embodiment
[0024] Combined with Figures 1-5 As shown, a sealing structure for the exhaust port of an explosion-proof valve includes a lid 1 for closing and opening the explosion-proof valve, an inner sealing groove 2 for cooperating with the lid 1 to seal the explosion-proof valve, and an inner sealing ring 3. The inner sealing groove 2 is provided on the valve body 4 of the explosion-proof valve, and the inner sealing ring 3 is embedded and installed in the inner sealing groove 2. When the lid 1 is in the closed state, the bottom of the lid 1 presses against and contacts the inner sealing ring 3 to form a seal.
[0025] The overall inner sealing groove 2 adopts a bottle mouth type structure, including an annular concave cavity 21 and a limiting opening 22 fixedly arranged at the top of the concave cavity. As Figure 2 shown, the limiting openings 22 on the inner sealing groove 2 are two convex blocks that are symmetric and facing each other in the cross-sectional view, and a 45° inclined clamping arc surface 23 is integrally formed at the bottom of the limiting opening 22 to form a bottle mouth type structure with an inclined bottle body.
[0026] The inner sealing ring 3 is a rubber part with an overall swallowtail structure, including a sealing ring body 31 with an annular structure similar to a swallow's body, a dovetail groove 32 similar to a swallow's tail opened at the top of the sealing ring body 31, limiting convex blocks 33 similar to swallow's wings fixedly arranged on both sides of the sealing ring body 31, and an arc-shaped tip 34 similar to a swallow's head fixedly arranged at the bottom of the sealing ring body 31. Among them, the sealing ring body 31, the limiting convex blocks 33, and the tip 34 are integrally formed. A limiting arc surface 35 that is also inclined at an angle of 45° and is in clamping fit with the clamping arc surface 23 is fixedly arranged at the top of the limiting convex block 33; in the state where the lid 1 is closed, the position corresponding to the top of the dovetail groove 32 on the sealing ring body 31 is in double-line contact with the lid 1, and the limiting convex blocks 33 are in interference fit with the concave cavity; the limiting convex blocks 33 are located below the limiting opening 22. In the state where the lid 1 is opened, the limiting convex blocks 33 are in clearance fit with the concave cavity and are in clamping fit with the limiting opening 22, and the tip 34 is in single-line contact with the bottom of the concave cavity.
[0027] The specific application process is as follows:
[0028] During use, the inner sealing ring 3 with a swallowtail structure is embedded into the inner sealing groove 2 of the bottle mouth structure, so that the limiting convex blocks 33 are located below the limiting opening 22; when closing the lid 1 to close the explosion-proof valve, the position corresponding to the top of the dovetail groove 32 on the sealing ring body 31 is in double-line contact with the lid 1 to form a double-layer seal. At the same time, under the axial pressure of the lid 1 on the sealing ring body 31, the limiting convex blocks 33 on both sides of the sealing ring body 31 are squeezed by the sealing ring body 31 and the fit between them and the concave cavity changes from clearance fit to transitional fit. And the tip 34 located below the sealing ring body 31 deforms after being squeezed by the sealing ring body 31, and the tip 34 changes from single-line contact with the bottom of the concave cavity to surface contact. The change in the fit relationship between the limiting convex blocks 33 and the tip 34 and the concave cavity respectively is beneficial to offset the torsional deformation at the position corresponding to the top of the dovetail groove 32 on the sealing ring body 31, ensuring effective sealing between the inner sealing ring 3 and the lid 1; when opening the lid 1 to open the explosion-proof valve, the sealing ring body 31 loses the axial pressure from the lid 1, and the inner sealing ring 3 as a whole returns to the initial state before deformation. Since the inner sealing ring 3 is made of rubber as a whole, it is easy to adhere to the lid 1 after being in close contact with the lid 1 for a long time. Therefore, during the process of opening the lid 1, the inner sealing ring 3 may completely move up with the lid 1. However, when the limiting convex blocks 33 on both sides of the sealing ring body 31 contact the limiting opening 22, the limiting arc surface 35 and the clamping arc surface 23 form a clamping fit to prevent the inner sealing ring 3 from moving up further, thus avoiding the problem of de-ringing.
[0029] The above are only the embodiments of the present utility model, and the present utility model is not limited to the fields involved in this embodiment. Common general knowledge such as the specific structures and characteristics known in the solutions is not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can also be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.
Claims
1. A sealing structure for the exhaust port of an explosion-proof valve, comprising a cover, an inner sealing groove, and an inner sealing ring embedded in the inner sealing groove, characterized in that: The overall inner sealing groove adopts a bottle mouth type structure, including a concave cavity body and a limiting port fixedly arranged at the top position of the concave cavity body; the overall inner sealing ring adopts a dovetail type structure, including a sealing ring body and a dovetail groove opened at the top of the sealing ring body. In the state where the lid is closed, the top of the dovetail groove is in double-line contact with the lid. Limiting convex blocks are fixedly arranged on both sides of the sealing ring body, and the limiting convex blocks are located below the limiting port and are in clamping fit with the limiting port.
2. The sealing structure for the exhaust port of the explosion-proof valve according to claim 1, characterized in that: The limiting convex block has a clearance fit with the concave cavity body in the state where the lid is opened, and has an interference fit with the concave cavity body in the state where the lid is closed.
3. A sealing structure for the exhaust port of an explosion-proof valve according to claim 2, characterized in that: An arc-shaped tip is fixedly arranged at the bottom of the sealing ring body, and the tip is in single-line contact with the bottom of the concave cavity body in the state where the lid is opened.
4. A sealing structure for the exhaust port of an explosion-proof valve according to claim 3, characterized in that: A limiting arc surface is fixedly arranged on the limiting convex block, and a clamping arc surface that is in clamping fit with the limiting arc surface is fixedly arranged at the bottom of the limiting port.