Pressure reducing valve

Abstract

The utility model provides a pressure reducing valve which comprises a valve body provided with an inlet, a first cavity, a throttling opening, a second cavity and an outlet which are communicated in sequence. The first end of the valve element component is located in the first cavity, the second end of the valve element component penetrates through the throttling opening and extends into the second cavity, a low-pressure cavity is formed between the second end of the valve element component and the valve body, the throttling opening and the low-pressure cavity are communicated with the low-pressure cavity, the valve element component moves relative to the valve body, and a pressure reduction structure is formed between the valve element component and the throttling opening. The valve element component is used for blocking or opening the throttling opening. The first elastic part is arranged between the valve body and the valve element component so as to apply acting force for opening the throttling opening to the valve element component; and the second elastic part is arranged between the valve body and the valve element component so as to apply acting force for blocking the throttling opening to the valve element component, and the elastic force of the second elastic part is smaller than that of the first elastic part. By means of the scheme, the problem that in the prior art, when the rear end of a pressure reducing valve is closed, inner leakage possibly occurs can be solved.

Description

Technical Field

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

[0002] The pressure reducing valve is an important component of the hydrogen storage system. Hydrogen storage cylinders usually store hydrogen under high pressure, while fuel cells or other applications using hydrogen may require lower pressure. The pressure reducing valve can reduce the high-pressure hydrogen to a preset pressure level.

[0003] In the prior art, a pressure reducing valve generally includes a valve body, a valve core component and an elastic portion, wherein the valve body is provided with an inlet, a high-pressure chamber, a throttle port and a low-pressure chamber that are connected in sequence, one end of the valve core component is located in the high-pressure chamber, and the other end passes through the throttle port and extends into the low-pressure chamber, forming a pressure reducing structure between the valve core component and the throttle port, and the elastic portion is driven and connected to the valve core component so that the valve core component blocks the throttle port.

[0004] However, the above-mentioned pressure reducing valve may cause internal leakage when the rear end of the pressure reducing valve is closed. Utility Model Content

[0005] The utility model provides a pressure reducing valve to solve the problem that the pressure reducing valve in the prior art may have internal leakage when the rear end of the pressure reducing valve is closed.

[0006] The utility model provides a pressure reducing valve, which includes: a valve body, which is provided with an inlet, a first chamber, a throttle port, a second chamber and an outlet that are connected in sequence; a valve core component, the first end of the valve core component is located in the first chamber, the second end of the valve core component passes through the throttle port and extends into the second chamber, a low-pressure chamber is formed between the second end of the valve core component and the valve body, the low-pressure chamber is connected to the throttle port, and the outlet is connected to the low-pressure chamber, the valve core component moves relative to the valve body, a pressure reduction structure is formed between the valve core component and the throttle port, and the valve core component is used to block or open the throttle port; a first elastic part is arranged between the valve body and the valve core component to apply a force to the valve core component to open the throttle port; a second elastic part is arranged between the valve body and the valve core component to apply a force to the valve core component to block the throttle port, and the elastic force of the second elastic part is smaller than the elastic force of the first elastic part.

[0007] Furthermore, the low-pressure chamber includes a third chamber and a fourth chamber that are interconnected. The third chamber is connected to the throttle port, and the outlet is connected to the fourth chamber. Along the direction from the throttle port to the third chamber, the flow area of ​​the third chamber gradually increases, and the flow area of ​​the fourth chamber is greater than the flow area of ​​the third chamber.

[0008] Furthermore, the valve core component includes a first tapered section, at least a portion of the first tapered section is located in the third chamber, and the cross-sectional area of ​​the first tapered section gradually increases along the direction from the throttle port to the third chamber.

[0009] Furthermore, the valve core component includes a second conical section, which is located in the first chamber. Along the direction from the first chamber to the throttle port, the cross-sectional area of ​​the second conical section gradually decreases, and a pressure reduction structure is formed between the second conical section and the throttle port. The second conical section is used to block or open the throttle port.

[0010] Furthermore, the second elastic portion is arranged in the first chamber, and the valve core component is guided and matched with the second elastic portion to guide the expansion and contraction process of the second elastic portion.

[0011] Furthermore, a guide groove is provided on the end surface of the first end of the valve core component, and a portion of the second elastic portion is passed through the guide groove and is guided and matched with the guide groove.

[0012] Furthermore, the second end of the valve core component divides the second chamber into a mounting chamber and a low-pressure chamber that are independent of each other, and the first elastic part is arranged in the mounting chamber.

[0013] Furthermore, the valve body includes: a main body, an inlet, a first chamber, a throttle port and an outlet are respectively arranged on the main body, a first mounting port is arranged at one end of the first chamber away from the throttle port; and a first end cover is arranged at the first mounting port.

[0014] Furthermore, the low-pressure chamber is arranged on the main body, and a second installation port is provided at one end of the low-pressure chamber away from the throttle port. The valve body also includes: a second end cover, which is arranged at the second installation port, and the second end cover and the main body cooperate to form a second chamber.

[0015] Furthermore, the valve core component includes: a valve stem, the first end of the valve stem is arranged in the first chamber, and the second end is arranged in the second chamber; a piston is movably arranged in the second chamber, the piston is arranged on the second end of the valve stem, and a low-pressure chamber is formed between the piston and the valve body.

[0016] Furthermore, the valve core component also includes: a first sealing portion, which is annularly arranged between the piston and the valve body, and the first sealing portion is used to seal the gap between the piston and the valve body.

[0017] By applying the technical solution of the present invention, the first elastic part and the second elastic part cooperate to work together. During the operation of the pressure reducing valve, the valve core component opens the throttle and adjusts the output pressure and flow; when the rear end of the pressure reducing valve is closed, the valve core component blocks the throttle. When the rear end of the pressure reducing valve is closed, the pressure of the fluid in the low-pressure chamber continues to increase, and the valve core component gradually blocks the throttle. At the same time, the second elastic part applies a force to the valve core component to block the throttle. Such an arrangement can improve the response speed of the valve core component in blocking the throttle, reduce the possibility of the fluid in the first chamber entering the low-pressure chamber, and reduce the possibility of further increase in the pressure of the fluid in the low-pressure chamber. The pressure of the fluid in the first chamber and the elastic force of the second elastic part jointly overcome the pressure of the fluid in the low-pressure chamber and the elastic force of the first elastic part to improve the sealing effect at the throttle and reduce the possibility of internal leakage of the pressure reducing valve. In the traditional technical solution, after the rear end of the pressure reducing valve is closed, the force to block the throttle port is applied to the valve core component only by the fluid in the high-pressure chamber. That is, the fluid in the high-pressure chamber needs to overcome the pressure of the fluid in the low-pressure chamber and the elastic force of the elastic part. The response speed of the valve core component is slow, resulting in a slow blocking speed of the throttle port. The fluid in the high-pressure chamber further enters the low-pressure chamber, increasing the pressure of the fluid in the low-pressure chamber, which easily leads to internal leakage of the pressure reducing valve. Compared with the traditional technical solution, the setting of this solution can improve the response speed of the valve core component when the rear end of the pressure reducing valve is closed, reduce the possibility of the fluid in the first chamber flowing into the low-pressure chamber, and the second elastic part applies a force to the valve core component to block the throttle port, thereby improving the sealing effect of the valve core component on the throttle port and reducing the possibility of internal leakage of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 The structure diagram of the pressure reducing valve provided by the embodiment of the utility model is shown;

[0020] Figure 2 A structural schematic diagram of the valve body of the pressure reducing valve provided in an embodiment of the utility model is shown.

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

[0022] 10. Valve body;

[0023] 101, inlet; 102, first chamber; 103, throttle; 104, second chamber; 1041, third chamber; 1042, fourth chamber; 1043, installation chamber; 105, outlet;

[0024] 11. Main body; 12. First end cover; 13. Second end cover;

[0025] 20. Valve core components;

[0026] 201, first tapered section; 202, second tapered section; 203, guide groove;

[0027] 21. Valve stem; 22. Piston;

[0028] 30. first elastic portion;

[0029] 40. second elastic portion;

[0030] 50. First sealing portion;

[0031] 60. Second sealing portion. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a pressure reducing valve, which includes a valve body 10, a valve core component 20, a first elastic portion 30, and a second elastic portion 40. The valve body 10 is provided with an inlet 101, a first chamber 102, a throttle port 103, a second chamber 104, and an outlet 105, which are sequentially connected. The first end of the valve core component 20 is located in the first chamber 102, and the second end of the valve core component 20 passes through the throttle port 103 and extends into the second chamber 104. A low-pressure chamber is formed between the second end of the valve core component 20 and the valve body 10. The low-pressure chamber is connected to the throttle port 103, and the outlet 105 is connected to the low-pressure chamber. The valve core component 20 moves relative to the valve body 10, forming a pressure-reducing structure between the valve core component 20 and the throttle port 103. The valve core component 20 is used to block or open the throttle port 103. The first elastic portion 30 is disposed between the valve body 10 and the valve core component 20 to apply a force to the valve core component 20 to open the throttle port 103. The second elastic portion 40 is disposed between the valve body 10 and the valve core component 20 to apply a force to the valve core component 20 to block the throttle port 103 . The elastic force of the second elastic portion 40 is smaller than the elastic force of the first elastic portion 30 .

[0034] By applying the technical solution of the present invention, the first elastic portion 30 and the second elastic portion 40 cooperate to operate. During the operation of the pressure reducing valve, the valve core component 20 opens the throttle port 103 and regulates the output pressure and flow rate. The arrangement of the first elastic portion 30 and the second elastic portion 40 can improve the stability of the flow rate and pressure regulation. When the rear end of the pressure reducing valve is closed, the valve core component 20 blocks the throttle port 103. When the rear end of the pressure reducing valve is closed, the pressure of the fluid in the low-pressure chamber continuously increases, and the valve core component 20 gradually blocks the throttle port 103. At the same time, the second elastic portion 40 applies a force to the valve core component 20 to block the throttle port 103. This arrangement can improve the response speed of the valve core component 20 in blocking the throttle port 103, reduce the possibility of fluid in the first chamber 102 entering the low-pressure chamber, and reduce the possibility of further increase in the pressure of the fluid in the low-pressure chamber. The pressure of the fluid in the first chamber 102 and the elastic force of the second elastic part 40 jointly overcome the pressure of the fluid in the low-pressure chamber and the elastic force of the first elastic part 30, thereby improving the sealing effect at the throttle 103 and reducing the possibility of internal leakage of the pressure reducing valve. In traditional technical solutions, after the rear end of the pressure reducing valve is closed, only the fluid in the high-pressure chamber applies a force to the valve core component to seal the throttle. That is, the fluid in the high-pressure chamber needs to overcome the pressure of the fluid in the low-pressure chamber and the elastic force of the elastic part. The response speed of the valve core component is slow, resulting in a slow sealing speed of the throttle. The fluid in the high-pressure chamber further enters the low-pressure chamber, increasing the pressure of the fluid in the low-pressure chamber, which easily leads to internal leakage of the pressure reducing valve. Compared with traditional technical solutions, the setting of this solution can improve the response speed of the valve core component 20 when the rear end of the pressure reducing valve is closed, reduce the possibility of the fluid in the first chamber 102 flowing into the low-pressure chamber, and the second elastic part 40 applies a force to the valve core component 20 to block the throttle port 103, thereby improving the sealing effect of the valve core component 20 on the throttle port 103 and reducing the possibility of internal leakage of the pressure reducing valve.

[0035] Furthermore, the low-pressure chamber includes a third chamber 1041 and a fourth chamber 1042 that are interconnected. The third chamber 1041 is connected to the throttle port 103, and the outlet 105 is connected to the fourth chamber 1042. Along the direction from the throttle port 103 to the third chamber 1041, the flow area of ​​the third chamber 1041 gradually increases, and the flow area of ​​the fourth chamber 1042 is larger than the flow area of ​​the third chamber 1041. When the fluid enters the third chamber 1041 through the throttle port 103, the flow area of ​​the third chamber 1041 gradually increases, which helps control the fluctuation of the fluid in the low-pressure chamber, making the pressure change of the fluid more gentle and improving the stability of the pressure at the outlet 105.

[0036] In the embodiment of this solution, the first chamber 102, the throttle port 103, the third chamber 1041, and the fourth chamber 1042 are sequentially connected along the axial direction. The inlet 101 is provided on the side of the first chamber 102, and the outlet 105 is provided on the side of the fourth chamber 1042.

[0037] In this embodiment, the valve core component 20 includes a first tapered section 201. At least a portion of the first tapered section 201 is located within the third chamber 1041. The cross-sectional area of ​​the first tapered section 201 gradually increases from the throttle 103 to the third chamber 1041. This arrangement allows the first tapered section 201 to guide the flow of fluid, thereby improving the stability of the fluid flow.

[0038] In the embodiment of this solution, the taper of the first tapered section 201 is the same as the taper of the third chamber 1041. This arrangement can further improve the smoothness and gentleness of fluid flow.

[0039] Furthermore, the valve core component 20 includes a second tapered section 202, which is located in the first chamber 102. The cross-sectional area of ​​the second tapered section 202 gradually decreases along the direction from the first chamber 102 to the throttle 103, forming a pressure-reducing structure between the second tapered section 202 and the throttle 103. The second tapered section 202 is used to block or open the throttle 103. This arrangement can improve the accuracy of the valve core component 20 in regulating the flow at the throttle 103 and improve the accuracy of regulating the output pressure at the throttle 103. That is, the above arrangement forms a pressure-reducing annulus between the second tapered section 202 and the throttle 103, and the pressure-reducing annulus forms a pressure-reducing structure. During the movement of the valve core component 20, the flow area of ​​the pressure-reducing annulus can be adjusted to adjust the pressure-reducing effect. In addition, the above arrangement can improve the sealing effect of the valve core component 20 blocking the throttle 103.

[0040] Specifically, the valve core component 20 further includes a connecting section, a first tapered section 201 and a second tapered section 202 that are coaxial and sequentially connected. The connecting section is disposed through the throttle port 103 with a gap therebetween.

[0041] In the embodiment of this solution, the second elastic portion 40 is disposed within the first chamber 102, and the valve core component 20 cooperates with the second elastic portion 40 to guide the expansion and contraction of the second elastic portion 40. This arrangement improves the stability of the second elastic portion 40 during expansion and contraction, and improves the stability of the force applied to the valve core component 20, thereby facilitating fine adjustment of the output pressure and flow of the pressure reducing valve.

[0042] Specifically, a guide groove 203 is provided on the end surface of the first end of the valve core component 20, and a portion of the second elastic portion 40 is disposed in the guide groove 203 and is guided and engaged with the guide groove 203. This arrangement has a simple structure, facilitates the processing of the guide groove 203, and can improve the structural compactness of the pressure reducing valve.

[0043] In the embodiment of this solution, the second end of the valve core component 20 divides the second chamber 104 into a mutually independent mounting chamber 1043 and a low-pressure chamber, and the first elastic portion 30 is disposed within the mounting chamber 1043. This arrangement allows the first elastic portion 30 to be located at the end of the valve core component 20 away from the second elastic portion 40, facilitating the first elastic portion 30 and the second elastic portion 40 to exert forces in opposite directions on the valve core component 20.

[0044] Specifically, the valve body 10 includes a main body 11, a first end cap 12, and a second end cap 13. The inlet 101, first chamber 102, throttle 103, low-pressure chamber, and outlet 105 are respectively disposed on the main body 11. A first mounting opening is provided at the end of the first chamber 102 away from the throttle 103, and the first end cap 12 is disposed at the first mounting opening. A second mounting opening is provided at the end of the low-pressure chamber away from the throttle 103, and the second end cap 13 is disposed at the second mounting opening. The second end cap 13 cooperates with the main body 11 to form the second chamber 104. This arrangement facilitates assembly of the pressure reducing valve.

[0045] Specifically, the first end cap 12 includes a first section and a second section connected in sequence along the axial direction. The cross-sectional area of ​​the first section is smaller than that of the second section. The first section is inserted into the first installation opening. One end of the second elastic portion 40 abuts against the end surface of the first section away from the second section.

[0046] The pressure reducing valve also includes a second sealing portion 60. A snap-fit ​​groove is provided on the side wall of the first section. The snap-fit ​​groove is annularly arranged on the side wall of the first section along the circumference of the first section. The second sealing portion 60 is embedded in the snap-fit ​​groove. The second sealing portion is used to seal the gap between the first end cover 12 and the main body 11.

[0047] In the embodiment of this solution, the valve core component 20 includes a valve stem 21 and a piston 22. The first end of the valve stem 21 extends through the first chamber 102, and the second end extends through the second chamber 104. A first tapered section 201 and a second tapered section 202 are respectively provided on the valve stem 21. The piston 22 is movably provided within the second chamber 104. The piston 22 is provided on the second end of the valve stem 21, forming a low-pressure chamber between the piston 22 and the valve body 10.

[0048] Specifically, the second end cap 13 includes an end plate and an annular plate. The annular plate is disposed on one side of the end plate and is integrally formed with the end plate. The annular plate is located at the outer periphery of the second mounting opening and is connected to the main body 11. The end plate is located at the end of the annular plate away from the main body 11. This arrangement forms a mounting cavity 1043 between the second end cap 13 and the main body 11.

[0049] Specifically, the second elastic portion 40 is disposed in the second end cover 13 , one end of the second elastic portion 40 abuts against the end plate of the second end cover 13 , and the other end abuts against the end of the piston 22 away from the valve stem 21 .

[0050] In the embodiment of this solution, the valve core component 20 further includes a first sealing portion 50, which is annularly disposed between the piston 22 and the valve body 10. The first sealing portion 50 is used to seal the gap between the piston 22 and the valve body 10. This arrangement can improve the sealing between the piston 22 and the valve body 10 and reduce the possibility of fluid entering the installation cavity 1043 from the low-pressure chamber.

[0051] Specifically, a mounting groove is provided on the side wall of the piston 22, and the mounting groove is annularly provided on the side wall of the piston 22 along the circumference of the piston, and the first sealing portion 50 is embedded in the mounting groove. This arrangement can improve the convenience of assembling the first sealing portion 50 and the piston 22.

[0052] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. 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 actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as 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 the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0054] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0056] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pressure reducing valve, characterized in that: include: The valve body (10) is provided with an inlet (101), a first chamber (102), a throttle port (103), a second chamber (104) and an outlet (105) which are connected in sequence; A valve core component (20), wherein a first end of the valve core component (20) is located in the first chamber (102), a second end of the valve core component (20) passes through the throttle port (103) and extends into the second chamber (104), a low-pressure chamber is formed between the second end of the valve core component (20) and the valve body (10), the throttle port (103) and the outlet (105) are respectively connected to the low-pressure chamber, the valve core component (20) moves relative to the valve body (10), a pressure reduction structure is formed between the valve core component (20) and the throttle port (103), and the valve core component (20) is used to block or open the throttle port (103); A first elastic portion (30) is arranged between the valve body (10) and the valve core component (20) to apply a force to the valve core component (20) to open the throttle port (103); The second elastic part (40) is arranged between the valve body (10) and the valve core component (20) to apply a force to the valve core component (20) to block the throttle port (103), and the elastic force of the second elastic part (40) is smaller than the elastic force of the first elastic part (30).

2. The pressure reducing valve according to claim 1, characterized in that: The low-pressure chamber comprises a third chamber (1041) and a fourth chamber (1042) which are interconnected, the third chamber (1041) being connected to the throttling port (103), the outlet (105) being connected to the fourth chamber (1042), and the flow area of ​​the third chamber (1041) gradually increasing along the direction from the throttling port (103) to the third chamber (1041), and the flow area of ​​the fourth chamber (1042) being greater than the flow area of ​​the third chamber (1041).

3. The pressure reducing valve according to claim 2, characterized in that: The valve core component (20) includes a first conical section (201), at least part of which is located in the third chamber (1041), and the cross-sectional area of ​​the first conical section (201) gradually increases along the direction from the throttling port (103) to the third chamber (1041).

4. The pressure reducing valve according to claim 1, characterized in that: The valve core component (20) includes a second conical section (202), which is located in the first chamber (102). Along the direction from the first chamber (102) to the throttle port (103), the cross-sectional area of ​​the second conical section (202) gradually decreases, and the pressure reduction structure is formed between the second conical section (202) and the throttle port (103). The second conical section (202) is used to block or open the throttle port (103).

5. The pressure reducing valve according to claim 1, characterized in that: The second elastic part (40) is arranged in the first chamber (102), and the valve core component (20) cooperates with the second elastic part (40) to guide the expansion and contraction process of the second elastic part (40).

6. The pressure reducing valve according to claim 5, characterized in that: A guide groove (203) is provided on the end surface of the first end of the valve core component (20), and part of the second elastic portion (40) is inserted into the guide groove (203) and is guided and matched with the guide groove (203).

7. The pressure reducing valve according to claim 1, characterized in that: The second end of the valve core component (20) divides the second chamber (104) into a mutually independent installation chamber (1043) and the low-pressure chamber, and the first elastic part (30) is arranged in the installation chamber (1043).

8. The pressure reducing valve according to claim 1, characterized in that: The valve body (10) comprises: A main body (11), the inlet (101), the first chamber (102), the throttle port (103) and the outlet (105) are respectively arranged on the main body (11), and a first installation port is arranged at one end of the first chamber (102) away from the throttle port (103); A first end cover (12) is arranged at the first installation opening.

9. The pressure reducing valve according to claim 8, characterized in that: The low-pressure chamber is arranged on the main body (11), and a second installation port is arranged at one end of the low-pressure chamber away from the throttle port (103). The valve body (10) further comprises: The second end cover (13) is arranged at the second installation opening, and the second end cover (13) cooperates with the main body (11) to form the second chamber (104).

10. The pressure reducing valve according to claim 1, characterized in that: The valve core component (20) comprises: a valve stem (21), wherein a first end of the valve stem (21) is inserted into the first chamber (102), and a second end of the valve stem (21) is inserted into the second chamber (104); a piston (22) movably disposed in the second chamber (104), the piston (22) being disposed on the second end of the valve stem (21), and the low-pressure chamber being formed between the piston (22) and the valve body (10); A first sealing portion (50) is annularly arranged between the piston (22) and the valve body (10), and the first sealing portion (50) is used to seal the gap between the piston (22) and the valve body (10).

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