Pressure reducing valve

Abstract

The utility model provides a pressure reducing valve which comprises a valve body provided with a containing cavity and an adjusting cavity, the side wall of the valve body is provided with an inlet and an outlet, and the inlet, the containing cavity, the adjusting cavity and the outlet are sequentially communicated. The pressure reduction assembly is arranged in the containing cavity and provided with a first spring and a first piston, the first piston is provided with a first matching part, the first spring abuts against the end face, close to the side of the inlet, of the first matching part, and the first spring can provide elastic force towards the outlet direction for the first piston; the first spring is matched with the first piston to reduce the fluid pressure at the inlet; and the adjusting assembly is movably arranged in the adjusting cavity, one end of the adjusting assembly abuts against the end face, close to one side of the outlet, of the first matching part, and the adjusting assembly can drive the first piston to move in the containing cavity so as to adjust the compression amount of the first spring. By means of the technical scheme, the problem that in the prior art, the output pressure of a pressure reducing valve cannot be adjusted can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a pressure reducing valve. Background Art

[0002] At present, in the application field of hydrogen fuel cells, hydrogen is usually stored in hydrogen storage bottles to provide hydrogen for fuel cells. The pressure inside the hydrogen storage bottles is usually high. In order to make the hydrogen in the hydrogen storage bottles meet the pressure required for the application of the fuel cell, a pressure reducing valve is usually set between the fuel cell and the hydrogen storage bottle to reduce the pressure of the hydrogen to the application range of the fuel cell system.

[0003] The pressure reducing valve in the prior art usually includes a spring and a piston. The hydrogen is first throttled between the spring and the piston, and then the high-pressure hydrogen is reduced to the pressure required by the rear-end fuel cell system under the joint action of the spring and the piston. The two ends of the piston are arranged opposite to each other with different areas. The piston has a through hole, and the hydrogen can flow through the piston through the through hole. The end of the side with a smaller area is arranged upstream in the flow direction of the hydrogen, and the end of the side with a larger area is arranged downstream in the flow direction of the hydrogen. The spring is sleeved on the piston to provide the piston with an elastic force in the direction of the flow of hydrogen. The force on the end of the piston with a smaller area and the combined force of the elastic force of the spring are equal to the force on the end of the piston with a larger area. The piston will remain in a state of force balance, that is, the output pressure on the end with a larger area will become smaller to achieve pressure reduction.

[0004] In the above process, since the elastic force of the spring is within a fixed value, this will cause the output pressure of the output end of the pressure reducing valve to be fixed within a range, which is not convenient for adjusting the pressure reducing effect of the pressure reducing valve and affects the applicability of the pressure reducing valve. Utility Model Content

[0005] The utility model provides a pressure reducing valve to solve the problem that the output pressure of the pressure reducing valve in the prior art cannot be adjusted.

[0006] The utility model provides a pressure reducing valve, which comprises: a valve body assembly, which has a containing cavity and an adjusting cavity, an inlet and an outlet are arranged on the side wall of the valve body assembly, and the inlet, the containing cavity, the adjusting cavity and the outlet are connected in sequence; a pressure reducing assembly, which is arranged in the containing cavity, and has a first spring and a first piston, and the first piston has a first matching portion, and the first spring abuts against the end face of the first matching portion on the side close to the inlet, and the first spring can provide the first piston with an elastic force in the direction of the outlet, and the first spring cooperates with the first piston to reduce the pressure of the fluid at the inlet; and an adjusting assembly, which is movably arranged in the adjusting cavity, and one end of the adjusting assembly abuts against the end face of the first matching portion on the side close to the outlet, and the adjusting assembly can drive the first piston to move in the containing cavity to adjust the compression amount of the first spring.

[0007] Furthermore, the regulating component has an opening end and a blocking end that are arranged opposite to each other, the end surface of the opening end abuts against the first piston, and the opening end is provided with a flow structure, which is used to connect the inlet and the outlet.

[0008] Furthermore, an installation port is provided on the valve body assembly, and the installation port is connected to the regulating chamber. The regulating assembly includes a sleeve, and the sleeve has an open end and a blocked end. The sleeve is movably inserted in the regulating chamber through the installation port to drive the first piston to move in the accommodating chamber. A flow hole is provided on the side wall of the sleeve, and the flow hole cooperates with the open end to form a circulation structure.

[0009] Further, a plurality of flow-through holes are provided, and the plurality of flow-through holes are arranged on the side wall of the sleeve at annular intervals.

[0010] Further, each of the plurality of flow holes arranged at intervals along the side wall of the sleeve forms a circulation group, and along the axial direction of the sleeve, a plurality of circulation groups are arranged at intervals on the side wall of the sleeve.

[0011] Furthermore, the side wall of the sleeve is threadably matched with the valve body assembly.

[0012] Furthermore, a sealing ring is arranged between the outer wall of the sleeve and the inner wall of the regulating chamber.

[0013] Furthermore, the pressure reducing valve also has a second piston and a second spring, the second piston has a second matching portion, the second spring abuts against the end face of the second matching portion toward the inlet side, the second spring can provide the second piston with an elastic force toward the outlet direction, the second piston is arranged on the side of the first piston close to the inlet, the second spring cooperates with the second piston to reduce the pressure of the fluid at the inlet, the second piston and the second spring form a primary pressure reducing structure, the first piston and the first spring form a secondary pressure reducing structure, the primary pressure reducing structure is arranged upstream of the secondary pressure reducing structure, and the secondary pressure reducing structure can reduce the pressure of the fluid passing through the primary pressure reducing structure.

[0014] Furthermore, the pressure reducing valve also has a unloading assembly, which is arranged on the valve body assembly and is connected to the regulating chamber. When the pressure in the regulating chamber is greater than the preset pressure value of the pressure reducing valve, the unloading assembly can connect the outside world with the regulating chamber.

[0015] Furthermore, the pressure reducing valve also has a waterproof exhaust assembly, which is arranged on the valve body assembly and is connected to the accommodating chamber to balance the air pressure in the accommodating chamber and the outside.

[0016] By applying the technical solution of the present application, the fluid will enter the valve body assembly through the inlet and flow out of the valve body assembly through the outlet. During this process, the fluid will flow through the accommodating chamber and the regulating chamber, and the fluid will be decompressed by the first spring and the first piston. During this process, the combined force of the pressure of the first spring and the fluid on the end face of the first piston close to the inlet is equal to the pressure of the fluid on the end face of the first piston close to the outlet. During this process, the first piston maintains force balance. In the present application, an adjusting component is arranged in the regulating chamber so that the adjusting component can drive the first piston, thereby compressing or releasing the first spring, changing the compression amount of the first spring, and adjusting the elastic force of the first spring, so as to adjust the pressure on the end face close to the outlet when the first piston achieves force balance, that is, to adjust the pressure at the outlet end of the pressure reducing valve, thereby improving the applicability of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 The schematic diagram of the structure of the pressure reducing valve provided by the utility model is shown;

[0019] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 Shows Figure 1 A partial enlarged view of point B in the middle.

[0021] The above drawings include the following reference numerals:

[0022] 10. Valve body assembly; 101. Inlet; 102. Outlet;

[0023] 10a, first valve body; 10b, second valve body; 10c, third valve body;

[0024] 11. Accommodation chamber; 111. Primary accommodation chamber; 112. Secondary accommodation chamber;

[0025] 12. Adjustment chamber;

[0026] 13. Throttle hole;

[0027] 21. First spring;

[0028] 22, first piston; 221, first matching portion; 222, through hole; 223, first extension portion; 224, first small end; 225, first large end;

[0029] 23. Second spring;

[0030] 24, second piston; 241, second matching portion; 242, flow channel; 243, second extension portion; 244, second small end; 245, second large end;

[0031] 25. Valve; 251. Flow hole;

[0032] 26. Mounting seat;

[0033] 30, sleeve; 301, open end; 302, plugging end; 31, flow hole; 32, sealing ring;

[0034] 40. Unloading assembly;

[0035] 50. Waterproof exhaust assembly. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] like Figures 1 to 3 As shown, an embodiment of the utility model provides a pressure reducing valve, which includes a valve body assembly 10, a pressure reducing assembly and a regulating assembly. The valve body assembly 10 has a receiving chamber 11 and a regulating chamber 12, and an inlet 101 and an outlet 102 are arranged on the side wall of the valve body assembly 10, and the inlet 101, the receiving chamber 11, the regulating chamber 12 and the outlet 102 are connected in sequence. The pressure reducing assembly is arranged in the receiving chamber 11, and the pressure reducing assembly has a first spring 21 and a first piston 22, and the first piston 22 has a first matching portion 221, and the first spring 21 abuts against the end face of the first matching portion 221 on the side close to the inlet 101, and the first spring 21 can provide the first piston 22 with an elastic force in the direction of the outlet 102, and the first spring 21 cooperates with the first piston 22 to reduce the fluid pressure at the inlet 101. The adjusting component is movably disposed in the adjusting chamber 12 , and one end of the adjusting component abuts against the end surface of the first matching portion 221 close to the outlet 102 . The adjusting component can drive the first piston 22 to move in the accommodating chamber 11 to adjust the compression amount of the first spring 21 .

[0038] By applying the technical solution of the present application, the fluid will enter the valve body assembly 10 through the inlet 101 and flow out of the valve body assembly 10 through the outlet 102. During this process, the fluid will flow through the accommodating chamber 11 and the regulating chamber 12, and the fluid will be decompressed by the first spring 21 and the first piston 22. During this process, the combined force of the pressure of the first spring 21 and the fluid on the end face of the first piston 22 close to the inlet 101 is equal to the pressure of the fluid on the end face of the first piston 22 close to the outlet 102. During this process, the first piston 22 maintains force balance. In the present application, an adjusting component is arranged in the regulating chamber 12, so that the adjusting component can drive the first piston 22, thereby compressing or releasing the first spring 21, changing the compression amount of the first spring 21, adjusting the elastic force of the first spring 21, and realizing the adjustment of the pressure on the end face of the first piston 22 close to the outlet 102 when the force balance is achieved, that is, realizing the adjustment of the pressure at the outlet end of the pressure reducing valve, thereby improving the applicability of the pressure reducing valve.

[0039] Specifically in the present application, the pressure reducing valve also has a second piston 24 and a second spring 23, the second piston 24 has a second matching portion 241, the second spring 23 and the second matching portion 241 are in contact with the end face toward the inlet 101, the second spring 23 can provide the second piston 24 with an elastic force toward the outlet 102, the second piston 24 is arranged on the side of the first piston 22 close to the inlet 101, the second spring 23 cooperates with the second piston 24 to reduce the pressure of the fluid at the inlet 101, the second piston 24 and the second spring 23 form a primary pressure reducing structure, the first piston 22 and the first spring 21 form a secondary pressure reducing structure, the primary pressure reducing structure is arranged upstream of the secondary pressure reducing structure, and the secondary pressure reducing structure can reduce the pressure of the fluid passing through the primary pressure reducing structure. Through the above arrangement, the hydrogen passing through the accommodating chamber 11 can be decompressed multiple times in stages to improve the pressure reducing effect of the pressure reducing valve.

[0040] Reference Figure 2As shown, the first piston 22 has a first matching portion 221 and a first extending portion 223 that are interconnected. The first spring 21 is sleeved on the first extending portion 223. A mounting seat 26 is also provided between the first piston 22 and the second piston 24. The first extending portion 223 is passed through the mounting seat 26. The mounting seat 26 is used to position the first piston 22. One end of the first spring 21 abuts against the mounting seat 26, and the other end abuts against the first matching portion 221. The first piston 22 has a first small end 224 and a first large end 225 which are arranged opposite to each other. The end of the first extension portion 223 away from the first matching portion 221 forms the first small end 224, and the end of the first matching portion 221 away from the first extension portion 223 forms the first large end 225. The first small end 224 is arranged close to the inlet 101, and the first large end 225 is arranged close to the outlet 102. The end surface area of ​​the first small end 224 is smaller than the end surface area of ​​the first large end 225. The first piston 22 has a through hole 222, which connects the first small end 224 and the first large end 225. The fluid can connect the first small end 224 and the first large end 225 through the through hole 222. When the fluid flows in the valve body assembly 10, the combined force of the pressure of the first small end 224 exerted by the fluid in the direction of the outlet 102 and the elastic force of the first spring 21 on the first piston 22 is equal to the pressure of the first large end 225 exerted by the fluid in the direction of the inlet 101. Since there is an area difference between the first small end 224 and the first large end 225, the pressure of the fluid can be reduced after passing through the through hole 222 and entering the regulating chamber 12, thereby realizing the two-stage pressure reduction of the pressure reducing valve.

[0041] Similarly, refer to Figure 3 As shown, the second piston 24 has a second matching portion 241 and a second extending portion 243 connected to each other, the second spring 23 is sleeved on the second extending portion 243, one end of the second spring 23 is abutted and matched with the accommodating cavity 11, and the other end is abutted and matched with the second matching portion 241. The second piston 24 has a second small end 244 and a second large end 245 which are arranged opposite to each other, the end of the second extending portion 243 away from the second matching portion 241 forms the second small end 244, and the end of the second matching portion 241 away from the second extending portion 243 forms the second large end 245, the second small end 244 is arranged close to the inlet 101, and the second large end 245 is arranged close to the outlet 102, the end surface area of ​​the second small end 244 is smaller than the end surface area of ​​the second large end 245, and the second piston 24 has a flow channel 242, and the fluid can communicate with the second small end 244 and the second large end 245 through the flow channel 242. When the fluid flows in the valve body assembly 10, the combined force of the pressure of the second small end 244 exerted by the fluid in the direction of the outlet 102 and the elastic force of the second spring 23 on the second piston 24 is equal to the pressure of the second large end 245 exerted by the fluid in the direction of the inlet 101. Since there is an area difference between the second small end 244 and the second large end 245, the pressure of the fluid can be reduced after passing through the flow channel 242 and entering the first piston 22, thereby realizing the first-level pressure reduction of the pressure reducing valve.

[0042] Specifically, the second small end 244 is a blocking structure, the second large end 245 is an opening structure, and the side wall of the second piston 24 has a plurality of flow openings arranged in an annular manner, and the flow openings are interconnected with the second large end 245 to form a flow channel 242 .

[0043] Furthermore, a valve 25 is provided between the first piston 22 and the second piston 24, and a plurality of flow holes 251 are provided on the valve 25. The fluid passing through the flow channel 242 will enter the through hole 222 after being throttled by the plurality of flow holes 251, so as to achieve regulation of the fluid flow rate and throttle the fluid that is about to enter the secondary decompression structure, so as to further reduce the pressure of the fluid. There is a gap between the first small end 224 and the valve 25.

[0044] Specifically in the present application, the valve body assembly 10 also has a throttling hole 13, which connects the inlet 101 and the accommodating chamber 11. The inner diameter of the throttling hole 13 is smaller than the inner diameter of the inlet 101 to throttle the fluid entering the accommodating chamber 11, and there is a gap between the second small end 244 and the throttling hole 13.

[0045] For ease of understanding, the flow path of the gas when flowing through the pressure reducing valve provided by the present application is as follows:

[0046] 1. The fluid enters the valve body through the inlet 101 and enters the accommodating chamber 11 through the throttle hole 13;

[0047] 2. After entering the accommodating chamber 11, the fluid will pass through the flow channel 242 and be decompressed once at the primary decompression structure;

[0048] 3. The fluid flowing out of the flow channel 242 will enter the through hole 222 through the flow hole 251, undergo secondary decompression at the secondary decompression structure, and enter the regulating chamber 12, and be discharged from the valve body assembly 10 through the outlet 102, thereby achieving the decompression effect of the pressure reducing valve.

[0049] Specifically, the regulating component has an opening end 301 and a blocking end 302 that are arranged opposite to each other, the end surface of the opening end 301 abuts against the first piston 22, and the opening end 301 is provided with a flow structure, and the flow structure is used to connect the inlet 101 and the outlet 102. Through the above arrangement, since the end surface of the opening end 301 of the regulating component abuts against the first piston 22, when the regulating component moves in the regulating chamber 12, the driving effect on the first piston 22 can be ensured, the radial deflection of the first piston 22 can be prevented, and the stability of the first piston 22 can be ensured. In addition, by providing the flow structure at the opening end 301, the regulating component can avoid the flow path of the fluid, ensure the normal flow of the fluid, and improve the space utilization rate inside the valve body assembly 10.

[0050] In a specific embodiment of the present application, a mounting port is provided on the valve body assembly 10, and the mounting port is communicated with the regulating chamber 12. The regulating assembly includes a sleeve 30, and the sleeve 30 has an open end 301 and a blocking end 302. The sleeve 30 is movably inserted into the regulating chamber 12 through the mounting port to drive the first piston 22 to move in the accommodating chamber 11. A flow hole 31 is provided on the side wall of the sleeve 30, and the flow hole 31 cooperates with the open end 301 to form a circulation structure. Through the above arrangement, the fluid flowing out through the through hole 222 can flow into the sleeve 30 through the open end 301 of the sleeve 30, and flow to the outlet 102 through the flow hole 31, thereby realizing the circulation of the fluid.

[0051] Specifically, a plurality of flow holes 31 are provided, and the plurality of flow holes 31 are arranged annularly and spaced apart on the side wall of the sleeve 30. Through the above arrangement, the plurality of flow holes 31 can increase the flow area of ​​the fluid, thereby ensuring the flow efficiency of the fluid, and no matter what the position of the sleeve 30 is, at least part of the flow holes 31 can correspond to the outlet 102 to achieve the flow of the fluid.

[0052] Further, each of the plurality of flow holes 31 arranged at intervals along the side wall of the sleeve 30 forms a circulation group, and along the axial direction of the sleeve 30, a plurality of flow groups are arranged at intervals on the side wall of the sleeve 30. Through the above arrangement, the plurality of flow groups have a plurality of flow holes 31, forming an array structure, which can comb the fluid passing through the inside of the sleeve 30, reduce the impact of the fluid on the inside of the valve body assembly 10, reduce the noise when the fluid is discharged from the outlet 102, and improve the user experience.

[0053] In a specific embodiment of the present application, the side wall of the sleeve 30 is threadedly engaged with the valve body assembly 10. Through the above arrangement, the position of the sleeve 30 in the adjustment chamber 12 can be changed by rotating the sleeve 30 relative to the valve body assembly 10, so that the sleeve 30 can move relative to the first piston 22 to adjust the compression of the first spring 21.

[0054] In other embodiments of the present application, the sleeve 30 may also be slidably matched with the valve body assembly 10 .

[0055] Furthermore, a sealing ring 32 is provided between the outer wall of the sleeve 30 and the inner wall of the regulating chamber 12. Through the above arrangement, the sealing ring 32 can ensure the sealing of the regulating chamber 12 and prevent gas leakage.

[0056] Specifically, the pressure reducing valve further comprises a relief assembly 40, which is arranged on the valve body assembly 10 and communicated with the regulating chamber 12. When the pressure in the regulating chamber 12 is greater than the preset pressure value of the pressure reducing valve, the relief assembly 40 can communicate the outside with the regulating chamber 12. Through the above arrangement, when the pressure inside the regulating chamber 12, that is, the fluid pressure after the pressure reduction by the pressure reducing assembly, is greater than the preset pressure, the relief assembly 40 can release the internal pressure of the valve body assembly 10.

[0057] Specifically, the unloading component 40 is an unloading valve.

[0058] Preferably, the preset pressure of the unloading valve may be 1.3 times the safety pressure to ensure safe operation of the pressure reducing valve.

[0059] In one embodiment of the present application, the pressure reducing valve further comprises a waterproof exhaust assembly 50, which is arranged on the valve body assembly 10 and communicates with the accommodating chamber 11 to balance the air pressure of the accommodating chamber 11 with that of the outside world. Through the above arrangement, the waterproof exhaust assembly 50 can ensure the stable operation of the pressure reducing assembly in the accommodating chamber 11, reduce the pressure influence on the pressure reducing assembly, and play a waterproof role in the accommodating chamber 11, thereby ensuring the stable use of the pressure reducing valve.

[0060] Specifically, the waterproof exhaust component 50 is a waterproof exhaust valve.

[0061] Specifically, the accommodating chamber 11 includes a first-level accommodating chamber 111 and a second-level accommodating chamber 112 which are interconnected. The first-level decompression structure is arranged in the first-level accommodating chamber 111, and the second-level decompression structure is arranged in the second-level accommodating chamber 112. Sealing structures are arranged at both ends of the first piston 22, and the first spring 21 is arranged between the two sealing structures. The first piston 22 cooperates with the two sealing structures to form a first spring chamber; sealing structures are also arranged at both ends of the second piston 24, and the second spring 23 is arranged between the two sealing structures. The second piston 24 cooperates with the two sealing structures to form a second spring chamber. The first spring chamber and the second spring chamber are both connected to the waterproof exhaust valve to ensure the pressure balance between the first spring chamber and the second spring chamber, and to ensure the stable movement of the first spring 21 and the second spring 23.

[0062] Specifically in the present application, the valve body assembly 10 includes a first valve body 10a and a second valve body 10b that are interconnected, the first valve body 10a has a primary accommodating chamber 111, the second valve body 10b has a secondary accommodating chamber 112, the outer walls of the first valve body 10a and the second valve body 10b are sleeved with a third valve body 10c, and the first valve body 10a and the second valve body 10b are connected via the third valve body 10c. Such a configuration can facilitate the assembly of the primary pressure relief structure and the secondary pressure relief structure, improve the convenience of assembly, and increase the connection strength between the primary pressure relief structure and the secondary pressure relief structure.

[0063] In some feasible embodiments of the present application, the outer walls of the first valve body 10a and the second valve body 10b are connected to the third valve body 10c through threaded fitting to improve the convenience of disassembly and assembly of the valve body assembly 10.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0066] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0069] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressure reducing valve, characterized in that: The pressure reducing valve comprises: A valve body assembly (10) comprises a receiving chamber (11) and a regulating chamber (12); an inlet (101) and an outlet (102) are arranged on a side wall of the valve body assembly (10); the inlet (101), the receiving chamber (11), the regulating chamber (12) and the outlet (102) are connected in sequence; A decompression assembly is arranged in the accommodating chamber (11), the decompression assembly comprises a first spring (21) and a first piston (22), the first piston (22) comprises a first matching portion (221), the first spring (21) abuts against an end surface of the first matching portion (221) on a side close to the inlet (101), the first spring (21) can provide the first piston (22) with an elastic force in a direction toward the outlet (102), and the first spring (21) cooperates with the first piston (22) to reduce the fluid pressure at the inlet (101); An adjusting component is movably arranged in the adjusting chamber (12), one end of the adjusting component abuts against an end surface of the first matching portion (221) close to the outlet (102), and the adjusting component can drive the first piston (22) to move in the accommodating chamber (11) to adjust the compression amount of the first spring (21).

2. The pressure reducing valve according to claim 1, characterized in that: The regulating component comprises an opening end (301) and a blocking end (302) which are arranged opposite to each other, the end surface of the opening end (301) abuts against the first piston (22), and the opening end (301) is provided with a flow structure, and the flow structure is used to connect the inlet (101) and the outlet (102).

3. The pressure reducing valve according to claim 2, characterized in that: The valve body assembly (10) is provided with an installation port, and the installation port is communicated with the regulating chamber (12). The regulating assembly includes a sleeve (30), and the sleeve (30) has the opening end (301) and the blocking end (302). The sleeve (30) is movably inserted into the regulating chamber (12) through the installation port to drive the first piston (22) to move in the accommodating chamber (11). A flow hole (31) is provided on the side wall of the sleeve (30), and the flow hole (31) cooperates with the opening end (301) to form the flow structure.

4. The pressure reducing valve according to claim 3, characterized in that: A plurality of the flow-through holes (31) are provided, and the plurality of the flow-through holes (31) are arranged on the side wall of the sleeve (30) at an annular interval.

5. The pressure reducing valve according to claim 4, characterized in that: Each of the plurality of flow holes (31) arranged at intervals along the side wall of the sleeve (30) forms a circulation group. Along the axial direction of the sleeve (30), the side wall of the sleeve (30) is provided with a plurality of circulation groups arranged at intervals.

6. The pressure reducing valve according to claim 3, characterized in that: The side wall of the sleeve (30) is threadably matched with the valve body assembly (10).

7. The pressure reducing valve according to claim 3, characterized in that: A sealing ring (32) is provided between the outer wall of the sleeve (30) and the inner wall of the adjustment chamber (12).

8. The pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve further comprises a second piston (24) and a second spring (23). The second piston (24) comprises a second matching portion (241). The second spring (23) and the second matching portion (241) abut against each other at their end surfaces facing the inlet (101). The second spring (23) can provide the second piston (24) with an elastic force in the direction of the outlet (102). The second piston (24) is arranged on a side of the first piston (22) close to the inlet (101). The second spring (23) and the second piston (24) cooperate to reduce the pressure of the fluid at the inlet (101). The second piston (24) and the second spring (23) form a primary pressure reducing structure. The first piston (22) and the first spring (21) form a secondary pressure reducing structure. The primary pressure reducing structure is arranged upstream of the secondary pressure reducing structure. The secondary pressure reducing structure can reduce the pressure of the fluid passing through the primary pressure reducing structure.

9. The pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve further comprises a relief assembly (40), wherein the relief assembly (40) is arranged on the valve body assembly (10), and the relief assembly (40) is connected to the regulating chamber (12). When the pressure in the regulating chamber (12) is greater than a preset pressure value of the pressure reducing valve, the relief assembly (40) can connect the outside with the regulating chamber (12).

10. The pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve further comprises a waterproof exhaust assembly (50), wherein the waterproof exhaust assembly (50) is arranged on the valve body assembly (10), and the waterproof exhaust assembly (50) is connected to the accommodating chamber (11) to balance the air pressure in the accommodating chamber (11) and the outside air pressure.

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