Safety relief valve

Abstract

The application relates to the field of pressure relief valves, and particularly discloses a safety pressure relief valve which comprises a valve body internally provided with a cavity, a pressure relief part sealedly connected to the cavity and movable along the axial direction of the cavity, and a diaphragm structure arranged in the cavity and used for closing the opening of the cavity; the pressure relief part comprises a spring used for connecting the diaphragm structure, and the opening and closing of the diaphragm structure are driven by the movement of the spring to realize the expansion and contraction. The application greatly reduces the requirements for various parts influencing the pressure relief pressure in the safety pressure relief valve, and reduces the manufacturing cost of the parts.

Description

Technical Field

[0001] This application relates to the field of pressure relief valves, and in particular to a safety pressure relief valve. Background Technology

[0002] Currently, the rated pressure relief value of commonly used safety relief valves on the market is fixed and cannot be adjusted, as it is determined by their product structure. Therefore, the accuracy of the pressure relief of each safety relief valve is determined by the machining accuracy of its constituent components, directly affecting the elastic force after spring compression. Better machining consistency among components results in higher pressure relief accuracy. However, many components affect the pressure relief accuracy of a safety relief valve. To ensure this accuracy, high-precision machining of each component is necessary, significantly increasing manufacturing difficulty and costs. Furthermore, even with high machining accuracy, certain tolerances are still required. Therefore, this type of safety relief valve not only has high manufacturing costs but also exhibits poor consistency in pressure relief across different products, leading to a low first-time assembly pass rate and impacting the performance of its supporting systems. Utility Model Content

[0003] To address the issues of high manufacturing costs and inconsistent pressure relief across products in existing technologies, which negatively impact performance, this application provides a safety pressure relief valve.

[0004] The safety relief valve provided in this application adopts the following technical solution: include: The valve body has an internal cavity; The pressure relief component is sealed to the cavity and can move along the axis of the cavity. A diaphragm structure, located within the cavity, is used to seal the cavity's opening; The pressure relief component includes a spring for connecting the diaphragm structure, the movement of the spring causing the diaphragm structure to open and close, thus expanding and contracting.

[0005] In one possible implementation, the diaphragm structure includes a diaphragm disposed within the cavity and used to seal the cavity opening, a fixing frame fixed to one end of the diaphragm, and one end of a spring connected to the fixing frame.

[0006] In one possible implementation, the diaphragm has deformable bends at both ends, a connecting portion is fixedly provided on the bend, a protrusion is provided on the connecting portion, and a groove is provided on the valve body for the connecting portion to be inserted, with the protrusion located in the groove.

[0007] In one possible implementation, the inner wall of the groove is provided with a first limiting part to prevent the protrusion from dislodging from the groove.

[0008] In one possible implementation, a guide block is fixedly provided on the end of the diaphragm facing the valve body inlet.

[0009] In one possible implementation, the pressure relief component further includes a connecting cover inserted into the valve body. One end of the connecting cover has an external thread, and the valve body has an internal thread that engages with the connecting cover. One end of the spring is connected to the connecting cover, and there is a gap between the fixing bracket and the connecting cover.

[0010] In one possible implementation, the pressure relief component further includes a connecting rod that passes through the connecting cover, a connecting block that is fixed on the fixing bracket, a gap between the connecting block and the connecting cover, a slot that is opened in the connecting block, one end of the connecting rod that is inserted into the slot, and a second limiting part that is provided on the connecting rod.

[0011] In one possible implementation, the outer end of the slot is flared.

[0012] In one possible implementation, the pressure relief component further includes an adjusting handle fixedly disposed on one end of the connecting rod, and the adjusting handle sealing cover is disposed on the connecting cover.

[0013] In summary, this application offers the following beneficial technical advantages: First, the connecting rod, fixing bracket, diaphragm, and spring are assembled together and then placed into the valve body cavity. A gasket is placed in place, and then the screw-on connecting cap is screwed onto the valve body. After tightening, the spring compression height and spring force are fixed, meaning the safety valve's pressure relief is constant and requires no adjustment. Finally, other performance characteristics of the pressure relief valve are tested, and the remaining accessories are assembled. By adjusting the axial connection position between the adjusting cap and the valve body, the spring force is adjusted, thereby achieving a precise pressure relief from the safety relief valve. This type of safety relief valve significantly reduces the requirements for components affecting the accuracy of the pressure relief, thus lowering the manufacturing cost of each component. Furthermore, since the pressure relief can be adjusted, the first-pass yield of the product assembly is increased. Moreover, as long as the pressure gauge is sufficiently accurate, the consistency of the safety relief valve's pressure relief can be easily guaranteed. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram based on an embodiment of this application; Figure 2 yes Figure 1 An enlarged schematic diagram of part A; Figure 3 yes Figure 1 An enlarged schematic diagram of part B.

[0015] Reference numerals: 1. Valve body; 2. Cavity; 3. Spring; 4. Diaphragm; 5. Fixing bracket; 6. Bending part; 7. Connecting part; 8. Protrusion; 9. Groove; 10. First limiting part; 11. Guide block; 12. Connecting cover; 13. Connecting rod; 14. Adjusting handle; 15. External thread; 16. Internal thread; 17. Connecting block; 18. Groove; 19. Second limiting part. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0017] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] Reference Figure 1-3A safety pressure relief valve includes a valve body 1, a pressure relief component, and a diaphragm 4 structure. The valve body 1 contains a cavity 2, with a pressure relief component connected to its upper end. This component can move along the axis of the cavity 2, allowing the pressure within the cavity 2 to increase or decrease. A diaphragm 4 structure is located at the opening of the valve body 1, sealing the opening. This diaphragm 4 structure can also be pushed open by pressure to achieve pressure relief. The pressure relief component includes a spring 3 for connecting the diaphragm 4 structure. When the spring 3 moves downward along the axis of the cavity 2, its compression increases, resulting in a larger thrust on the diaphragm 4 structure within the cavity 2. When the spring 3 moves upward along the axis of the cavity 2, its extension decreases, resulting in a smaller thrust on the diaphragm 4 structure within the cavity 2. Furthermore, when the external pressure is lower than the set value, the diaphragm 4 structure blocks the opening of the valve body 1. When the pressure exceeds the set value, the diaphragm 4 structure is opened by the external pressure, and the spring 3 is also compressed, thus achieving the pressure relief function.

[0021] The diaphragm 4 structure includes a diaphragm 4 and a fixing frame 5. The diaphragm 4 is disposed inside the cavity 2 and is used to seal the opening of the cavity 2. The fixing frame 5 is fixedly disposed on one end of the diaphragm 4, and one end of the spring 3 is connected to the fixing frame 5. The outer side of the diaphragm 4 can be subjected to pressure to drive the fixing frame 5 to move, causing the spring 3 to be compressed and pushed open.

[0022] The diaphragm 4 has deformable bending portions 6 at both ends, and a connecting portion 7 is fixedly provided on the bending portion 6. The connecting portion 7 is provided with a protrusion 8. The valve body 1 has a groove 9 for the connecting portion 7 to be inserted, and the protrusion 8 is located in the groove 9.

[0023] The inner wall of the groove 9 is provided with a first limiting part 10 to prevent the protrusion 8 from dislodging from the groove 9.

[0024] A guide block 11 is fixedly provided on the end of the diaphragm 4 facing the water inlet of the valve body 1.

[0025] The pressure relief component also includes a connecting cover 12, a connecting rod 13, and an adjusting handle 14. The connecting cover 12 is partially inserted into the valve body 1. One end of the connecting cover 12 is provided with an external thread 15. The valve body 1 is provided with an internal thread 16 that engages with the connecting cover 12. One end of the spring 3 is connected to the connecting cover 12. There is a gap between the fixing bracket 5 and the connecting cover 12. The connecting rod 13 passes through the connecting cover 12. A connecting block 17 is fixed on the fixing bracket 5. There is a gap between the connecting block 17 and the connecting cover 12. A slot 18 is opened in the connecting block 17. One end of the connecting rod 13 is inserted into the slot 18. The connecting rod 13 is provided with a second limiting part 19. The outer end of the slot 18 is flared. The adjusting handle 14 is fixed on one end of the connecting rod 13. The adjusting handle 14 is sealed on the connecting cover 12.

[0026] The specific operation process is as follows: First, assemble the connecting rod 13, fixing bracket 5, diaphragm 4, and spring 3 together, then place them into the cavity 2 of the valve body 1, add a gasket, and then screw the already screwed-in connecting cover 12 onto the valve body 1. After tightening, the compression height and force of spring 3 are fixed, meaning the safety valve's pressure relief is constant and requires no adjustment. Finally, test the other performance characteristics of the pressure relief valve and assemble the remaining accessories. By adjusting the axial connection position between the connecting cover 12 and the valve body 1, the force of spring 3 can be adjusted, thereby achieving the precise pressure relief of the safety relief valve. This type of safety relief valve significantly reduces the requirements for components affecting the accuracy of the pressure relief, thus reducing the manufacturing cost of each component. Furthermore, since the pressure relief can be adjusted, the first-pass yield of the product assembly is increased. Moreover, as long as the pressure gauge is sufficiently accurate, the consistency of the safety relief valve's pressure relief can be easily guaranteed.

[0027] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0028] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A safety pressure relief valve, characterized in that: include: The valve body (1) has an internal cavity (2); The pressure relief component is sealed to the cavity (2) and can move along the axial direction of the cavity (2); A diaphragm (4) structure is disposed inside the cavity (2) for sealing the opening of the cavity (2); The pressure relief component includes a spring (3) for connecting the diaphragm (4) structure, wherein the movement of the spring (3) drives the opening and closing of the diaphragm (4) structure to extend and retract.

2. The safety relief valve according to claim 1, characterized in that: The diaphragm (4) structure includes a diaphragm (4) disposed in the cavity (2) and used to seal the opening of the cavity (2), a fixing frame (5) fixedly disposed on one end of the diaphragm (4), and one end of the spring (3) connected to the fixing frame (5).

3. The safety relief valve according to claim 2, characterized in that: The diaphragm (4) has deformable bends (6) at both ends. A connecting part (7) is fixedly provided on the bend (6). A protrusion (8) is provided on the connecting part (7). A groove (9) is provided on the valve body (1) for the connecting part (7) to be inserted. The protrusion (8) is located in the groove (9).

4. The safety relief valve according to claim 3, characterized in that: The inner wall of the groove (9) is provided with a first limiting part (10) to prevent the protrusion (8) from dislodging from the groove (9).

5. The safety relief valve according to claim 3, characterized in that: A guide block (11) is fixedly provided on the end of the diaphragm (4) facing the water inlet of the valve body (1).

6. The safety relief valve according to claim 2, characterized in that: The pressure relief component also includes a connecting cover (12) inserted into the valve body (1). One end of the connecting cover (12) is provided with an external thread (15), and the valve body (1) is provided with an internal thread (16) that engages with the connecting cover (12). One end of the spring (3) is connected to the connecting cover (12), and there is a gap between the fixing bracket (5) and the connecting cover (12).

7. The safety relief valve according to claim 6, characterized in that: The pressure relief component also includes a connecting rod (13) that passes through the connecting cover (12). A connecting block (17) is fixedly provided on the fixing frame (5). There is a gap between the connecting block (17) and the connecting cover (12). A slot (18) is opened in the connecting block (17). One end of the connecting rod (13) is inserted into the slot (18). A second limiting part (19) is provided on the connecting rod (13).

8. The safety relief valve according to claim 7, characterized in that: The outer end of the slot (18) is flared.

9. The safety relief valve according to claim 6, characterized in that: The pressure relief component also includes an adjustment handle (14) fixedly disposed on one end of the connecting rod (13), and the adjustment handle (14) is sealed on the connecting cover (12).

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