Pressure reducing valve

Abstract

The utility model discloses a pressure reducing valve, relates to the technical field of pressure reducing valves, and adopts the technical scheme that the pressure reducing valve comprises a pressure reducing valve body, a base and an adjusting screw rod which is in threaded fit with the pressure reducing valve body, a high-pressure port, a high-pressure cavity, an isolation block, a low-pressure cavity and a low-pressure port are sequentially arranged in the pressure reducing valve body, and a valve core is connected in the low-pressure cavity in a sliding manner; a mounting hole communicated with the high-pressure cavity is formed in the lower end of the pressure reducing valve body, and a vortex connecting body is mounted in the mounting hole. According to the pressure reducing valve, the vortex connecting body is arranged in the pressure reducing valve body, so that gas entering from the high-pressure port can enter the vortex connecting body, the gas can impact the inner wall of the vortex connecting body, the air speed of the gas is greatly reduced, the pressure of the gas is converted into rotating kinetic energy, and the air speed of the air outlet is far smaller than that of the air inlet; and therefore, the impact force of the gas on the valve element can be reduced, cavitation of the gas on the valve element is reduced, and the service life of the valve element is longer.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and more specifically, to a pressure reducing valve. Background Technology

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure by adjusting the pressure. It automatically maintains a stable outlet pressure by relying on the energy of the medium itself. From a fluid mechanics perspective, a pressure reducing valve is a throttling element with variable local resistance. That is, by changing the throttling area, the flow velocity and kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of pressure reduction. Then, by relying on the regulation of the control and adjustment system, the fluctuation of the downstream pressure is balanced with the spring force, so that the downstream pressure is kept constant within a certain error range.

[0003] The pressure reducing valve is equipped with a high-pressure port, a low-pressure port, an adjusting screw, and a valve core. Gas enters the pressure reducing valve through the high-pressure port and moves the valve core under the action of high pressure, causing the high-pressure port to enter one end of the low-pressure port. This increases the gas pressure at the low-pressure port, causing the valve core to move downward again. When the gas flows out of the low-pressure port and the pressure decreases again, the high pressure will continue to move the valve core, and this cycle continues. By rotating the adjusting screw, the force applied to the valve core can be changed, thereby changing the pressure reduction of the pressure reducing valve. However, during long-term use, the high-pressure gas will exert a large impact force on the valve core, causing cavitation and resulting in wear of the valve core.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a pressure reducing valve in order to solve the above-mentioned problems.

[0006] The above-mentioned technical objective of this utility model embodiment is achieved through the following technical solution: a pressure reducing valve, comprising a pressure reducing valve body, a base, and an adjusting screw threadedly engaged with the pressure reducing valve body. The pressure reducing valve body is sequentially provided with a high-pressure port, a high-pressure chamber, an isolation block, a low-pressure chamber, and a low-pressure port. The isolation block is provided with a connecting hole connecting the high-pressure chamber and the low-pressure chamber. A valve core is slidably connected within the low-pressure chamber. The lower end of the valve core abuts against the isolation block and blocks the connecting hole. The lower end of the adjusting screw abuts against an adjusting spring, which abuts against the valve core. The lower end of the pressure reducing valve body is provided with an installation hole communicating with the high-pressure chamber. A vortex connector is installed within the installation hole. The vortex connector is provided with an air inlet and an air outlet. The air inlet communicates with the high-pressure chamber, and the air outlet communicates with the connecting hole. The base abuts against the vortex connector.

[0007] The present invention is further configured such that: the lower surface of the isolation block is provided with an annular groove, and the air outlet of the vortex connector is engaged with the annular groove.

[0008] The present invention is further configured such that the diameter of the air outlet is larger than the diameter of the air inlet.

[0009] The present invention is further configured such that: the lower end of the vortex connector is fixedly connected to a support column that engages with the mounting hole; the base is provided with a boss that abuts against the mounting hole; the boss abuts against the support column; and the base is fixed to the pressure reducing valve body by bolts.

[0010] The present invention is further configured such that: the lower end of the adjusting screw is fixedly connected to a contact platform that abuts against the adjusting spring; the body of the pressure reducing valve is provided with a slot that slides with the contact platform; the upper end of the adjusting spring is engaged with the slot; the upper end of the valve core is provided with a connecting post; and the body of the pressure reducing valve is provided with a groove that slides with the connecting post.

[0011] The present invention is further configured such that: a guide surface is provided on the valve core, and a plurality of annular protrusions are provided on the guide surface.

[0012] In summary, this utility model has the following beneficial effects:

[0013] By incorporating a vortex connector within the pressure reducing valve body, gas entering from the high-pressure port flows into the vortex connector body. The gas impacts the inner wall of the vortex connector body, significantly reducing the gas velocity and converting the gas pressure into rotational kinetic energy. Furthermore, the outlet diameter of the vortex connector body is larger than the inlet diameter, further reducing the gas velocity to a level much lower than the inlet velocity. This reduces the impact force of the gas on the valve core and minimizes gas cavitation. The vortex connector body is also removable and replaceable when internal wear occurs, extending the valve core's service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a pressure reducing valve according to the present invention;

[0015] Figure 2 for Figure 1 A magnified view of A in the middle.

[0016] Reference numerals: 1. Pressure reducing valve body; 2. Base; 3. Adjusting screw; 4. High-pressure port; 5. High-pressure chamber; 6. Isolation block; 7. Low-pressure chamber; 8. Low-pressure port; 9. Connecting hole; 10. Valve core; 11. Adjusting spring; 12. Mounting hole; 13. Scroll connector; 14. Air inlet; 15. Air outlet; 16. Annular groove; 17. Support column; 18. Boss; 19. Bolt; 20. Contact platform; 21. Slot; 22. Connecting column; 23. Column groove; 24. Raised ridge. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] In one possible embodiment, please refer to Figure 1 As shown, a pressure reducing valve includes a pressure reducing valve body 1, a base 2, and an adjusting screw 3 threadedly engaged with the pressure reducing valve body 1. The pressure reducing valve body 1 contains, in sequence, a high-pressure port 4, a high-pressure chamber 5, an isolation block 6, a low-pressure chamber 7, and a low-pressure port 8. The isolation block 6 has a connecting hole 9 connecting the high-pressure chamber 5 and the low-pressure chamber 7. High-pressure gas enters the high-pressure chamber 5 through the high-pressure port 4, then enters the low-pressure chamber 7 through the connecting hole 9, and finally flows out through the low-pressure port 8. A valve core 10 is slidably connected within the low-pressure chamber 7. The lower end of the valve core 10 abuts against the isolation block 6 and blocks the connecting hole 9. The valve core 10 acts as a barrier and pressure reducing agent for the high-pressure gas. The lower end of the adjusting screw 3 abuts against an adjusting spring 11, which in turn abuts against the valve core 10. By loosening the adjusting screw 3, the pressure of the adjusting screw 3 on the adjusting spring 11 can be changed, thereby changing the pressure of the adjusting spring 11 on the valve core 10, and thus changing the pressure reduction magnitude of the valve core 10.

[0019] For further details, please refer to Figure 1 and Figure 2As shown, the lower end of the adjusting screw 3 is fixedly connected to a contact platform 20 that abuts against the adjusting spring 11. The pressure reducing valve body 1 is provided with a slot 21 that slides with the contact platform 20. The upper end of the adjusting spring 11 is engaged with the slot 21. The slot 21 limits the upper end of the adjusting spring 11, preventing the adjusting spring 11 from becoming misaligned and ensuring the pressure reducing efficiency of the pressure reducing valve. The upper end of the valve core 10 is provided with a connecting post 22. The pressure reducing valve body 1 is provided with a groove 23 that slides with the connecting post 22. The groove 23 limits the valve core 10, so that the valve core 10 can only move up and down within the pressure reducing valve body 1. The valve core 10 is provided with a guide surface that abuts against the connecting hole 9. The guide surface is provided with multiple annular protrusions 24. By providing multiple annular protrusions 24, the surface of the guide surface forms multiple alternating peaks and valleys, thereby slowing down the wind speed of the gas passing through the guide surface and reducing the cavitation of the gas on the valve core 10.

[0020] For further details, please refer to Figure 1 As shown, the lower end of the pressure reducing valve body 1 is provided with a mounting hole 12 that communicates with the high-pressure chamber 5. A vortex connector 13 is installed in the mounting hole 12. The vortex connector 13 is provided with an air inlet 14 and an air outlet 15. The air inlet 14 is connected to the high-pressure chamber 5, and the air outlet 15 is connected to the connecting hole 9. Thus, the gas entering from the high-pressure port 4 will enter the vortex connector 13 through the air inlet 14. The gas will impact the inner wall of the vortex connector 13, thereby significantly reducing the gas velocity and converting the gas pressure into rotational kinetic energy. Moreover, the diameter of the air outlet 15 of the vortex connector 13 is larger than the diameter of the air inlet 14, which can further reduce the gas velocity, making the air velocity at the air outlet 15 much smaller than the air velocity at the air inlet 14. This can reduce the impact force of the gas on the valve core 10, reduce the cavitation of the gas on the valve core 10, and give the valve core 10 a longer service life.

[0021] For further details, please refer to Figure 1As shown, the scroll connector 13 is detachably installed inside the pressure reducing valve body 1. This detachable installation allows the scroll connector 13 to be replaced if internal damage occurs, ensuring continued protection of the pressure reducing valve body 1. The base 2 abuts against the scroll connector 13. An annular groove 16 is provided on the lower surface of the isolation block 6, and the air outlet 15 of the scroll connector 13 engages with the annular groove 16. A support column 17, which engages with the mounting hole 12, is fixedly connected to the lower end of the scroll connector 13. A boss 18 abuts against the mounting hole 12 on the base 2, and the boss 18 abuts against the support column 17. The base 2 and the pressure reducing valve body... The volute connector 13 is fixed with bolts 19. When installing the volute connector 13, the air inlet 14 is aligned with the high-pressure chamber 5. The volute connector 13 is inserted into the mounting hole 12 and then slides to the air outlet 15 and engages with the annular groove 16, allowing the air outlet 15 to flow with the connecting hole 9. The isolation block 6 limits the movement of the volute connector 13. Then, the base 2 is installed. The protrusion 18 of the base 2 abuts against the support column 17, allowing the base 2 to support the volute connector 13 and prevent it from sliding up and down. Finally, the base 2 is fixed to the pressure reducing valve body 1 with bolts 19, thus completing the installation of the volute connector 13. The installation is simple and convenient.

[0022] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, 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 any suitable manner in one or more embodiments or examples.

[0023] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure reducing valve comprising a pressure reducing valve body (1), a base (2) and an adjusting screw (3) which is screwed to the pressure reducing valve body (1), characterized in that: The high-pressure port (4), the high-pressure cavity (5), the isolation block (6), the low-pressure cavity (7) and the low-pressure port (8) are sequentially arranged in the pressure reducing valve body (1), the connecting hole (9) for connecting the high-pressure cavity (5) and the low-pressure cavity (7) is arranged on the isolation block (6), the valve core (10) is slidably connected in the low-pressure cavity (7), the lower end of the valve core (10) abuts against the isolation block (6) and blocks the connecting hole (9), the lower end of the adjusting screw (3) abuts against the adjusting spring (11), the adjusting spring (11) abuts against the valve core (10), the mounting hole (12) for communicating with the high-pressure cavity (5) is arranged at the lower end of the pressure reducing valve body (1), the vortex connecting body (13) is mounted in the mounting hole (12), the air inlet (14) and the air outlet (15) are arranged on the vortex connecting body (13), the air inlet (14) communicates with the high-pressure cavity (5), the air outlet (15) communicates with the connecting hole (9), and the base (2) abuts against the vortex connecting body (13).

2. A pressure reducing valve according to claim 1, wherein: The lower surface of the isolation block (6) is provided with an annular groove (16), and the air outlet (15) of the vortex connecting body (13) is clamped with the annular groove (16).

3. A pressure reducing valve according to claim 2, wherein: The aperture of the air outlet (15) is larger than the aperture of the air inlet (14).

4. The pressure reducing valve according to claim 1, wherein: The lower end of the vortex connecting body (13) is fixedly connected with the supporting column (17) clamped with the mounting hole (12), the base (2) is provided with the boss (18) abutting against the mounting hole (12), the boss (18) abuts against the supporting column (17), and the base (2) and the pressure reducing valve body (1) are fixed by the bolt (19).

5. The pressure reducing valve according to claim 1, wherein: The lower end of the adjusting screw (3) is fixedly connected with the contact table (20) abutting against the adjusting spring (11), the pressure reducing valve body (1) is provided with the clamping groove (21) slidably matched with the contact table (20), the upper end of the adjusting spring (11) is clamped with the clamping groove (21), the upper end of the valve core (10) is provided with the connecting column (22), and the pressure reducing valve body (1) is provided with the column groove (23) slidably matched with the connecting column (22).

6. A pressure reducing valve according to claim 1, wherein: The valve core (10) is provided with a guide surface, and a plurality of annular convex edges (24) are arranged on the guide surface.

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