Self-operated pressure stabilizing valve

Abstract

The utility model discloses a self-operated pressure maintaining valve which comprises a valve body, a valve rod and a valve element, a supporting frame is arranged above the valve body, a connecting frame is installed above the supporting frame, a membrane and a membrane cover are installed above the connecting frame, an air source inlet is formed in the membrane cover, a tray is arranged at the top of the valve rod and abuts against the membrane, and the valve element is arranged on the valve rod. A lower membrane cavity is formed between the membrane and the connecting frame, an upper membrane cavity is formed between the membrane and the membrane cover, a screw hole is formed in the bottom of the connecting frame, an adjusting rod is in threaded connection with the interior of the screw hole, the upper end of the adjusting rod extends into the lower membrane cavity and is fixedly provided with a first limiting plate, and a second limiting plate is arranged in the upper membrane cavity; the valve further comprises a telescopic device used for controlling the second limiting plate to ascend and descend, the situation that limit deformation of the diaphragm is generated when the instantaneous pressure is too large is reduced, the service life of the diaphragm is prolonged, the situation that the valve rod and the valve element are subjected to large impact force is reduced, and therefore the service life of the valve body is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a self-regulating pressure valve. Background Technology

[0002] Pressure regulating valves adjust the flow rate of the medium by controlling the opening degree of the opening and closing elements within the valve body, thereby reducing the pressure of the medium. Simultaneously, they utilize the downstream pressure to regulate the opening degree of the opening and closing elements, maintaining the downstream pressure within a certain range. Even with constantly changing inlet pressure, the outlet pressure is kept within a set range, thus protecting downstream components. In pressure regulating valves, the diaphragm deforms under stress, causing the valve stem to rise and fall, thus adjusting the valve opening to achieve pressure reduction and stabilization. However, in existing pressure regulating valves, the diaphragm deformation range is not adjustable. When the instantaneous pressure is too high, the diaphragm will undergo extreme deformation. Over time, this may degrade the diaphragm's toughness and resilience, affecting the stability of the valve body. Furthermore, large instantaneous pressures on the diaphragm can push the valve stem downwards, subjecting the valve stem and valve core to significant impact forces, potentially affecting the service life of the valve stem and valve core. Therefore, it is necessary to adjust and limit the diaphragm deformation range according to actual operating conditions to protect the internal structure of the valve body and extend its service life. Utility Model Content

[0003] The purpose of this utility model is to provide a self-regulating pressure valve to solve the problems mentioned in the background art.

[0004] To solve the above technical problems, this utility model adopts the following technical solution: A self-regulating pressure regulating valve includes a valve body, a valve stem, and a valve core. A support frame is provided above the valve body, and a connecting frame is installed above the support frame. A diaphragm and a diaphragm cover are installed above the connecting frame. An air source inlet is provided on the diaphragm cover. A tray is provided on the top of the valve stem and abuts against the diaphragm. A lower diaphragm cavity is provided between the diaphragm and the connecting frame, and an upper diaphragm cavity is provided between the diaphragm and the diaphragm cover. A screw hole is opened at the bottom of the connecting frame, and an adjusting rod is threaded into the screw hole. The upper end of the adjusting rod extends into the lower diaphragm cavity and is fixed with a first limiting plate. A second limiting plate is provided in the upper diaphragm cavity. The valve also includes a telescopic device for controlling the lifting and lowering of the second limiting plate.

[0005] Using the above technical solution, when the diaphragm deforms upwards under pressure, it will abut against the second limiting plate; when the diaphragm deforms downwards under pressure, it will push the tray, which abuts against the first limiting plate. Adjustments are made according to actual working conditions: activating the telescopic component controls the second limiting plate to move up and down within the upper diaphragm cavity, thereby limiting the maximum range of upward deformation of the diaphragm; rotating the adjusting rod causes it to move up and down within the screw hole, thereby causing the first limiting plate to move up and down within the upper diaphragm cavity, thus limiting the maximum range of downward deformation of the diaphragm. This reduces the extreme deformation of the diaphragm due to excessive instantaneous pressure, extending the diaphragm's service life and reducing the impact force on the valve stem and valve core, thus extending the valve body's service life.

[0006] As a further optimization of this utility model, the top of the membrane cover is provided with a through hole, and the telescopic device is an electric push rod installed above the membrane cover. The movable shaft of the electric push rod passes through the through hole and is connected to the second limiting plate.

[0007] As a further optimization of this utility model, a sealing ring is provided on the inner wall of the through hole.

[0008] By adopting the above technical solutions and setting a sealing ring, the airtightness of the upper membrane cavity can be guaranteed.

[0009] As a further optimization of this utility model, the first limiting plate is provided with at least four plates, which are equidistantly distributed circumferentially around the valve stem.

[0010] By adopting the above technical solution, setting multiple first limiting plates can support the pallet and diaphragm at various positions, achieving a good limiting effect.

[0011] As a further optimization of this utility model, a buffer pad is provided on the top of the first limiting plate.

[0012] By adopting the above technical solution, the buffer pad can reduce the impact force when the tray comes into contact with the first limiting plate.

[0013] As a further optimization of this utility model, a lever is vertically provided at the bottom of the adjusting rod.

[0014] The beneficial effects of this utility model are as follows: When the diaphragm deforms upward under force, it will abut against the second limiting plate; when the diaphragm deforms downward under force, it will push the tray, and the tray will abut against the first limiting plate. Adjustment can be made according to the actual working conditions: opening the telescopic component controls the second limiting plate to move up and down in the upper diaphragm cavity, thereby limiting the maximum range of upward deformation of the diaphragm; rotating the adjusting rod causes the adjusting rod to move up and down in the screw hole, thereby causing the first limiting plate to move up and down in the upper diaphragm cavity, thereby limiting the maximum range of downward deformation of the diaphragm. This reduces the extreme deformation of the diaphragm due to excessive instantaneous pressure, extends the service life of the diaphragm, and reduces the impact force on the valve stem and valve core, thereby extending the service life of the valve body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged diagram in the image.

[0017] The labels in the diagram mean the following: 11. Valve body; 12. Valve stem; 13. Valve core; 14. Support frame; 15. Connecting frame; 16. Diaphragm; 17. Diaphragm cover; 171. Air source inlet; 21. Lower diaphragm chamber; 22. Upper diaphragm chamber; 31. First limiting plate; 32. Second limiting plate; 4. Screw hole; 5. Adjusting rod; 51. Toggle rod; 6. Through hole; 61. Sealing ring; 7. Telescopic device; 8. Buffer pad. Detailed Implementation

[0018] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0019] See appendix Figure 1-2 The present embodiment of this utility model further includes: a self-regulating pressure valve, comprising a valve body 11, a valve stem 12 and a valve core 13, a support frame 14 above the valve body 11, a connecting frame 15 above the support frame 14, a diaphragm 16 and a diaphragm cover 17 above the connecting frame 15, an air source inlet 171 on the diaphragm cover 17, a tray on the top of the valve stem 12 and abutting against the diaphragm 16, a lower diaphragm cavity 21 between the diaphragm 16 and the connecting frame 15, and an upper diaphragm cavity 22 between the diaphragm 16 and the diaphragm cover 17;

[0020] The bottom of the connecting frame 15 is provided with a screw hole 4, and an adjusting rod 5 is threaded into the screw hole 4. The upper end of the adjusting rod 5 extends into the lower membrane cavity 21 and is fixed with a first limiting plate 31. Specifically, there are at least four first limiting plates 31, which are equidistantly distributed circumferentially around the valve stem 12. The top of the first limiting plate 31 is provided with a buffer pad 8, and the bottom of the adjusting rod 5 is provided with a lever 51 vertically.

[0021] The upper membrane cavity 22 is provided with a second limiting plate 32; it also includes a telescopic device 7 for controlling the lifting and lowering of the second limiting plate 32. Specifically, the top of the membrane cover 17 is provided with a through hole 6, and the telescopic device 7 is an electric push rod installed above the membrane cover 17. The movable shaft of the electric push rod passes through the through hole 6 and is connected to the second limiting plate 32. Furthermore, the inner wall of the through hole 6 is provided with a sealing ring 61. The sealing ring 61 can ensure the airtightness of the upper membrane cavity 22.

[0022] The principle of this utility model is as follows: when the diaphragm 16 is deformed upward under force, it will abut against the second limiting plate 32;

[0023] When the diaphragm 16 is deformed downwards under force, it will push the tray. Multiple first limiting plates 31 can support the tray and the diaphragm 16 at various positions, achieving a good limiting effect. The tray abuts against the first limiting plates 31, and the buffer pad 8 can reduce the impact force when the tray abuts against the first limiting plates 31.

[0024] Adjustments are made according to actual working conditions: the telescopic component is activated to control the second limiting plate 32 to move up and down within the upper membrane cavity 22, thereby limiting the maximum range of deformation of the diaphragm 16 facing upward.

[0025] By operating the lever 51 to rotate the adjusting rod 5, the adjusting rod 5 moves up and down within the screw hole 4, thereby causing the first limiting plate 31 to move up and down within the upper diaphragm cavity 22. This limits the maximum downward deformation range of the diaphragm 16, thereby reducing the extreme deformation of the diaphragm 16 due to excessive instantaneous pressure, extending the service life of the diaphragm 16, and reducing the impact force on the valve stem 12 and valve core 13, thus extending the service life of the valve body 11.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A self-operated pressure regulating valve, comprising a valve body (11), a valve stem (12), and a valve core (13), wherein a support frame (14) is provided above the valve body (11), a connecting frame (15) is installed above the support frame (14), a diaphragm (16) and a diaphragm cover (17) are installed above the connecting frame (15), the diaphragm cover (17) is provided with an air source inlet (171), and a tray is provided on the top of the valve stem (12) and abuts against the diaphragm (16), characterized in that, A lower membrane cavity (21) is provided between the diaphragm (16) and the connecting frame (15), and an upper membrane cavity (22) is provided between the diaphragm (16) and the membrane cover (17). A screw hole (4) is provided at the bottom of the connecting frame (15), and an adjusting rod (5) is threaded into the screw hole (4). The upper end of the adjusting rod (5) extends into the lower membrane cavity (21) and is fixed with a first limiting plate (31). A second limiting plate (32) is provided in the upper membrane cavity (22). The device also includes a telescopic device (7) for controlling the lifting and lowering of the second limiting plate (32).

2. The self-operated pressure regulating valve according to claim 1, characterized in that, The membrane cover (17) has a through hole (6) at the top. The telescopic device (7) is an electric push rod installed above the membrane cover (17). The movable shaft of the electric push rod passes through the through hole (6) and is connected to the second limiting plate (32).

3. A self-operated pressure regulating valve according to claim 2, characterized in that, The inner wall of the through hole (6) is provided with a sealing ring (61).

4. A self-operated pressure regulating valve according to claim 1, characterized in that, The first limiting plate (31) has at least four of them, which are equidistantly distributed circumferentially around the valve stem (12) as the center.

5. A self-operated pressure regulating valve according to claim 1, characterized in that, The top of the first limiting plate (31) is provided with a buffer pad (8).

6. A self-operated pressure regulating valve according to claim 1, characterized in that, The bottom of the adjusting rod (5) is vertically provided with a lever (51).

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