Pressure reducing valve with pressure relief structure
By adding a pressure relief structure outside the pressure relief valve body, and using the pressure relief hole and pressure relief plug to achieve automatic pressure relief, the problem of air pressure fluctuation in abnormal situations is solved, ensuring air pressure stability.
Patent Information
- Application Number
- CN202421908961.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-08
AI Technical Summary
When the valve body inlet suddenly opens or the valve core is damaged, the outlet air pressure may fluctuate, causing discomfort to the user, and even poses safety risks.
A pressure relief valve body is added to the outside of the pressure relief valve body, and the pressure relief plug is combined with the pressure relief spring to achieve automatic pressure relief of gas and stabilize the air pressure.
It effectively reduces gas fluctuations in the pressure reduction chamber, ensures the stability of the outlet air pressure, and avoids safety hazards.
Smart Images
Figure CN223120746U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure reducing valves, and particularly relates to a pressure reducing valve with a pressure relief structure. Background Art
[0002] A pressure reducing valve is a component that can adjust gas pressure. Its general principle is to change the gas flow rate or gas kinetic energy to cause different gas pressure losses, thereby achieving the purpose of pressure reduction. The pressure reducing valve can ensure that the high-pressure gas originally stored in the gas cylinder is discharged to the user after being reduced in multiple stages, and can effectively prevent excessive pressure from causing harm to the user.
[0003] The main structure of the pressure reducing valve includes a valve body with a pressure reducing cavity and a valve core located in the valve cavity. The valve body is provided with an inlet and an outlet, and the valve core is located between the inlet and the outlet and is used to reduce the pressure of the gas in the pressure reducing cavity. However, in actual use, when the valve body inlet is suddenly opened, or the valve core is damaged, etc., the air pressure at the valve body outlet may suddenly increase due to fluctuations, resulting in discomfort for the user, and even potential safety hazards in severe cases. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problem that when the pressure reducing valve in the prior art has situations such as the sudden opening of the valve body inlet or the damage of the valve core, the air pressure at the valve body outlet may suddenly increase due to fluctuations, resulting in discomfort for the user, and even potential safety hazards in severe cases.
[0005] To solve the above problems, the utility model provides a pressure reducing valve with a pressure relief structure, which includes a pressure reducing valve body with a pressure reducing cavity. The pressure reducing valve body is provided with an inlet and an outlet respectively communicating with the pressure reducing cavity, and further includes a pressure relief valve body connected to the outside of the pressure reducing valve body. The pressure relief valve body is provided with an inner hole penetrating along its own axis. The pressure reducing valve body is provided with a pressure relief hole. The pressure relief hole includes an inner end communicating with the pressure reducing cavity and an outer end communicating with the inner hole. A pressure relief spring and a pressure relief plug are arranged in the inner hole. The pressure relief spring acts on the pressure relief plug to push the pressure relief plug to block the outer end of the pressure relief hole.
[0006] Compared with the prior art, by adding a pressure relief valve body outside the pressure reducing valve body in the above solution, when the air pressure in the pressure reducing cavity suddenly increases, the gas in the pressure reducing cavity will apply a thrust to the pressure relief plug through the pressure relief hole. If the gas thrust received by the pressure relief plug is greater than the elastic force of the pressure relief spring, the pressure relief plug will move away from the outer end of the pressure relief hole. At this time, the gas in the pressure reducing cavity can flow from the pressure relief hole into the inner hole of the pressure relief valve body and then be discharged to the outside, realizing the pressure relief of the gas in the pressure reducing cavity until the air pressure in the pressure reducing cavity returns to normal. The pressure relief spring pushes the pressure relief plug to block the outer end of the pressure relief hole again, thereby effectively reducing the gas fluctuation in the pressure reducing cavity and ensuring better air pressure stability at the outlet of the pressure reducing valve body.
[0007] In an improved solution, the pressure relief hole and the outlet are both located on the side peripheral wall of the pressure reducing valve body, and the pressure relief hole and the outlet are opposite to each other. Thus, when the air pressure at the outlet of the pressure reducing valve body is too high, the pressure relief plug in the pressure relief valve body can immediately open the pressure relief hole to relieve the pressure, and reduce the air pressure at the outlet position of the pressure reducing cavity in the first time.
[0008] In an improved solution, the inner hole of the pressure relief valve body, the pressure relief hole and the outlet of the pressure reducing valve body are coaxially arranged, which is beneficial to improving the consistency of the air pressure of the pressure relief hole and the outlet of the pressure reducing valve body.
[0009] In an improved solution, a groove is provided on the end face of the pressure relief plug facing the pressure relief hole. A plug piece is provided in the groove and there is a spacing between the plug piece and the bottom of the groove. The plug piece is aligned with the outer end of the pressure relief hole to achieve sealing, and the spacing between the plug piece and the bottom of the groove provides a certain deformation space for the plug piece, ensuring a better sealing effect of the plug piece on the outer end of the pressure relief hole.
[0010] In an improved solution, a ring-shaped convex platform is provided at the position of the outer end of the pressure reducing valve body corresponding to the pressure relief hole. The wall thickness of the ring-shaped convex platform gradually decreases in the direction away from the pressure relief hole. The plug piece is used to abut against the side of the ring-shaped convex platform away from the pressure relief hole, thereby further improving the sealing effect of the plug piece on the outer end of the pressure relief hole.
[0011] In an improved solution, a circumferentially protruding ring-shaped cover is provided at one end of the inner hole away from the pressure relief hole. One end of the pressure relief spring abuts against the ring-shaped cover and the other end abuts against the pressure relief plug, thereby ensuring that the pressure relief spring can apply a thrust to the pressure relief plug in the direction of the outer end of the pressure relief hole.
[0012] In an improved solution, a protruding first guide post is provided on the side of the pressure relief plug facing away from the pressure relief hole, and a protruding second guide post is provided on the side of the ring-shaped cover facing the pressure relief plug. Both ends of the pressure relief spring are respectively sleeved on the first guide post and the second guide post, thereby guiding the pressure relief spring through the first guide post and the second guide post to ensure that the movement of the pressure relief spring is more stable.
[0013] In an improved solution, a mounting screw hole is provided on the outside of the pressure reducing valve body, and the pressure relief valve body is provided with an external thread. The pressure relief valve body is screwed into the mounting screw hole, thereby realizing the convenient assembly of the pressure relief valve body relative to the pressure reducing valve body. Description of the Drawings
[0014] Figure 1 The front view schematic diagram of a pressure reducing valve with a pressure relief structure;
[0015] Figure 2 is a schematic cross-sectional view along the Figure 1 A-A section line in
[0016] Figure 3 and is Figure 2 a partially enlarged schematic view of area B in
[0017] Explanation of reference numerals:
[0018] 1. Pressure reducing valve body; 11. Pressure reducing cavity; 12. Inlet; 13. Outlet; 14. Pressure relief hole; 15. Annular boss; 16. Mounting screw hole; 2. Pressure relief valve body; 21. Inner hole; 22. Annular cover; 23. Second guide post; 3. Pressure relief spring; 4. Pressure relief plug; 41. Groove; 42. Plug piece; 43. First guide post. Detailed implementation manners
[0019] Those skilled in the art should understand that the following implementation manners are only used to explain the technical principle of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.
[0020] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.
[0021] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.
[0022] The present application will be further described in detail below with reference to the drawings and specific embodiments.
[0023] Please refer to Figures 1 - 3, A pressure reducing valve with a pressure relief structure provided by an embodiment of the present utility model includes a pressure reducing valve body 1 having a pressure reducing chamber 11. The pressure reducing valve body 1 is provided with an inlet 12 and an outlet 13 that are respectively communicated with the pressure reducing chamber 11. It also includes a pressure relief valve body 2 connected to the outside of the pressure reducing valve body 1. The pressure relief valve body 2 is provided with an inner hole 21 penetrating along its own axis. The pressure reducing valve body 1 is provided with a pressure relief hole 14. The pressure relief hole 14 includes an inner end communicated with the pressure reducing chamber 11 and an outer end communicated with the inner hole 21. A pressure relief spring 3 and a pressure relief plug 4 are arranged in the inner hole 21. The pressure relief spring 3 acts on the pressure relief plug 4 to push the pressure relief plug 4 to block the outer end of the pressure relief hole 14.
[0024] Compared with the prior art, in the above solution, by adding a pressure relief valve body 2 outside the pressure reducing valve body 1, when the air pressure in the pressure reducing chamber 11 suddenly increases, the gas in the pressure reducing chamber 11 will apply a thrust to the pressure relief plug 4 through the pressure relief hole 14. If the gas thrust received by the pressure relief plug 4 is greater than the elastic force of the pressure relief spring 3, the pressure relief plug 4 will move away from the outer end of the pressure relief hole 14. At this time, the gas in the pressure reducing chamber 11 can flow from the pressure relief hole 14 into the inner hole 21 of the pressure relief valve body 2 and then be discharged to the outside, realizing the pressure relief of the gas in the pressure reducing chamber 11 until the air pressure in the pressure reducing chamber 11 returns to normal. The pressure relief spring 3 pushes the pressure relief plug 4 to block the outer end of the pressure relief hole 14 again, thereby effectively reducing the gas fluctuation in the pressure reducing chamber 11 and ensuring better air pressure stability at the outlet 13 of the pressure reducing valve body 1.
[0025] In this embodiment, the inlet 12 is located at the front end of the pressure reducing valve body 1, and both the pressure relief hole 14 and the outlet 13 are located on the side peripheral wall at the rear end of the pressure reducing valve body 1, and the pressure relief hole 14 and the outlet 13 are opposite to each other. Thus, when the air pressure at the outlet 13 of the pressure reducing valve body 1 is too high, the pressure relief plug 4 in the pressure relief valve body 2 can immediately open the pressure relief hole 14 for pressure relief, reducing the air pressure at the position of the outlet 13 of the pressure reducing chamber 11 in the first time. Further, the inner hole 21 of the pressure relief valve body 2, the pressure relief hole 14 and the outlet 13 of the pressure reducing valve body 1 are all coaxially arranged, which is beneficial to improving the consistency of the air pressure of the pressure relief hole 14 and the outlet 13 of the pressure reducing valve body 1.
[0026] As an improvement to this embodiment, a groove 41 is provided on the end face of the pressure relief plug 4 facing the pressure relief hole 14. A blocking piece 42 is arranged in the groove 41 and there is a gap between the blocking piece 42 and the bottom of the groove 41. The blocking piece 42 is directly opposite to the outer end of the pressure relief hole 14 to achieve blocking, and the gap between the blocking piece 42 and the bottom of the groove 41 provides a certain deformation space for the blocking piece 42, ensuring a better blocking effect of the blocking piece 42 on the outer end of the pressure relief hole 14.
[0027] Further, a ring-shaped boss 15 is provided at a position of the pressure reducing valve body 1 corresponding to the outer end of the pressure relief hole 14. The wall thickness of the ring-shaped boss 15 gradually decreases in a direction away from the pressure relief hole 14. The plug 42 is used to abut against the side of the ring-shaped boss 15 away from the pressure relief hole 14, thereby further improving the plugging effect of the plug 42 on the outer end of the pressure relief hole 14.
[0028] In this embodiment, a circumferentially protruding ring-shaped cover 22 is provided at one end of the inner hole 21 away from the pressure relief hole 14. One end of the pressure relief spring 3 abuts against the ring-shaped cover 22 and the other end abuts against the pressure relief plug 4, thereby ensuring that the pressure relief spring 3 can apply a thrust force to the pressure relief plug 4 in the direction of the outer end of the pressure relief hole 14.
[0029] Further, a protruding first guide post 43 is provided on the side of the pressure relief plug 4 facing away from the pressure relief hole 14, and a protruding second guide post 23 is provided on the side of the ring-shaped cover 22 facing the pressure relief plug 4. Both ends of the pressure relief spring 3 are respectively sleeved on the first guide post 43 and the second guide post 23, thereby guiding the pressure relief spring 3 through the first guide post 43 and the second guide post 23 to ensure that the movement of the pressure relief spring 3 is more stable.
[0030] In this embodiment, a mounting screw hole 16 is provided on the outer side of the pressure reducing valve body 1, and the pressure relief valve body 2 is provided with an external thread. The pressure relief valve body 2 is screwed into the mounting screw hole 16, thereby realizing the convenient assembly of the pressure relief valve body 2 relative to the pressure reducing valve body 1.
[0031] It should be noted that in the description of the present application, terms such as "inner" and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application; all directional indications (such as up, down, left, right, front, back, inner, outer) are only used to explain the relative positional relationships and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0032] In the description of the present application, the description referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0033] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.
Claims
1. A pressure reducing valve with a pressure relief structure, comprising a pressure reducing valve body (1) having a pressure reducing chamber (11), the pressure reducing valve body (1) being provided with an inlet (12) and an outlet (13) respectively communicating with the pressure reducing chamber (11), characterized in that, It further includes a pressure relief valve body (2) connected to the outside of the pressure reducing valve body (1). The pressure relief valve body (2) is provided with an inner hole (21) penetrating along its own axis. The pressure reducing valve body (1) is provided with a pressure relief hole (14). The pressure relief hole (14) includes an inner end communicating with the pressure reducing cavity (11) and an outer end communicating with the inner hole (21). A pressure relief spring (3) and a pressure relief plug (4) are arranged in the inner hole (21). The pressure relief spring (3) acts on the pressure relief plug (4) to push the pressure relief plug (4) to block the outer end of the pressure relief hole (14).
2. The pressure reducing valve with a pressure relief structure according to claim 1, characterized in that, Both the pressure relief hole (14) and the outlet (13) are located on the circumferential side wall of the pressure reducing valve body (1), and the pressure relief hole (14) and the outlet (13) are opposite to each other.
3. The pressure reducing valve with a pressure relief structure according to claim 2, wherein, The inner hole (21) of the pressure relief valve body (2), the pressure relief hole (14) and the outlet (13) of the pressure reducing valve body (1) are coaxially arranged.
4. The pressure reducing valve with a pressure relief structure according to any one of claims 1-3, characterized in that, The end face of the pressure relief plug (4) facing the pressure relief hole (14) is provided with a groove (41). A plug piece (42) is arranged in the groove (41) and there is a gap between the plug piece (42) and the bottom of the groove (41). The plug piece (42) is directly opposite to the outer end of the pressure relief hole (14) to achieve blocking.
5. The pressure reducing valve with a pressure relief structure according to claim 4, characterized in that, The pressure reducing valve body (1) is provided with an annular boss (15) at the position corresponding to the outer end of the pressure relief hole (14). The wall thickness of the annular boss (15) gradually decreases in the direction away from the pressure relief hole (14). The plug piece (42) is used to abut against the side of the annular boss (15) away from the pressure relief hole (14).
6. The pressure reducing valve with a pressure relief structure according to any one of claims 1-3, characterized in that, An annular retaining cover (22) protruding circumferentially is arranged at one end of the inner hole (21) away from the pressure relief hole (14). One end of the pressure relief spring (3) abuts against the annular retaining cover (22) and the other end abuts against the pressure relief plug (4).
7. The pressure reducing valve with a pressure relief structure according to claim 6, characterized in that, A protruding first guide post (43) is arranged on the side of the pressure relief plug (4) facing away from the pressure relief hole (14). A protruding second guide post (23) is arranged on the side of the annular retaining cover (22) facing the pressure relief plug (4). The two ends of the pressure relief spring (3) are respectively sleeved on the first guide post (43) and the second guide post (23).
8. The pressure reducing valve with a pressure relief structure according to any one of claims 1-3, characterized in that, An installation screw hole (16) is arranged on the outside of the pressure reducing valve body (1). The pressure relief valve body (2) is provided with an external thread. The pressure relief valve body (2) is screwed to the installation screw hole (16).