Pressure reducing valve

Abstract

The utility model provides a pressure reducing valve, which comprises a body part provided with an inlet, a high-pressure cavity, a first throttling port, a low-pressure cavity, a second throttling port, a first chamber and an outlet which are communicated in sequence, the second throttling port is arranged at the side part of the low-pressure cavity, and a second chamber is arranged at one side, far away from the first throttling port, of the high-pressure cavity; the first end of the first valve element component is located in the second cavity and divides the second cavity into a third cavity and a fourth cavity which are independent of each other, the third cavity communicates with the low-pressure cavity, the second end of the first valve element component sequentially penetrates through the high-pressure cavity and the first throttling opening and then stretches into the low-pressure cavity, and the pressure of fluid in the third cavity is adjustable so as to adjust the pressure of fluid in the low-pressure cavity; a first pressure reduction structure is formed between the first valve element part and the first throttling opening; at least part of the second valve element component is arranged in the first cavity, and a second pressure reduction structure is formed between the second valve element component and the second throttling opening. By means of the scheme, the problem that in the prior art, a secondary pressure reducing valve is complex in structure 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] A pressure reducing valve is a valve used to regulate fluid pressure. Its main function is to reduce the fluid from a higher inlet pressure to the required lower outlet pressure.

[0003] The existing two-stage pressure reducing valve usually includes two pressure reducing valves, one of which is installed in the normal direction and the other is installed in the reverse direction. A throttling orifice plate is arranged between the two pressure reducing valves, and the two pressure reducing valves are connected through the throttling orifice plate. The high-pressure fluid becomes a medium-pressure fluid after passing through the first-stage pressure reducing valve. The medium-pressure fluid enters the second-stage pressure reducing valve through the throttling orifice plate and is reduced in pressure again to a low-pressure fluid. However, the arrangement of the above two pressure reducing valves is relatively complex in structure and occupies a large space. Utility Model Content

[0004] The utility model provides a pressure reducing valve to solve the problem that one pressure reducing valve is installed forwardly and the other pressure reducing valve is installed backward in the two-stage pressure reducing valve in the prior art, resulting in a relatively complicated structure.

[0005] The utility model provides a pressure reducing valve, which comprises: a main body, which is provided with an inlet, a high-pressure chamber, a first throttle port, a low-pressure chamber, a second throttle port, a first chamber and an outlet which are connected in sequence, the second throttle port being arranged at the side of the low-pressure chamber, the main body is also provided with a second chamber, the second chamber is located at a side of the high-pressure chamber away from the first throttle port; a first valve core component, the first end of the first valve core component is located in the second chamber and divides the second chamber into a third chamber and a fourth chamber which are independent of each other, the third chamber is arranged close to the high-pressure chamber, the third chamber is connected with the low-pressure chamber, the second end of the first valve core component sequentially passes through the high-pressure chamber and the first throttle port and then extends into the low-pressure chamber, the pressure of the fluid in the third chamber is adjustable to adjust the pressure of the fluid in the low-pressure chamber, and a first pressure reducing structure is formed between the first valve core component and the first throttle port; a second valve core component, at least part of the second valve core component is arranged in the first chamber, and a second pressure reducing structure is formed between the first end of the second valve core component and the second throttle port.

[0006] Furthermore, the flow area of ​​the second pressure reducing structure is adjustable to adjust the pressure at the outlet.

[0007] Furthermore, along the flow direction of the fluid, the flow area of ​​the second throttle port gradually increases, the first end of the second valve core component is inserted into the second throttle port, and the second valve core component can move relative to the main body.

[0008] Furthermore, along the flow direction of the fluid, the cross-sectional area of ​​the first end of the second valve core component gradually increases, and the taper of the first end of the second valve core component is smaller than the taper of the second throttle port.

[0009] Furthermore, the pressure reducing valve further comprises: a driving assembly, which is arranged on the main body, and the driving assembly is drivingly connected to the second valve core component to move the second valve core component.

[0010] Furthermore, the driving component includes: a coil component, which is arranged on the main body and is annularly arranged on the outer periphery of the second valve core component; a static iron core, which is arranged on the coil component, and the static iron core and the second valve core component are distributed along the moving direction of the second valve core component, and the static iron core and the second valve core component are magnetically matched.

[0011] Furthermore, a first mounting port is provided on the main body, and the first mounting port is connected to one end of the first chamber away from the second throttle port, and the coil component comprises: a mounting shell, one end of which is arranged at the first mounting port and connected to the first chamber, and a static iron core is arranged at the other end of the mounting shell; a coil assembly is arranged in the mounting shell, the second end of the second valve core component is passed through the mounting shell, and at least a part of the static iron core is passed through one end of the coil assembly away from the first mounting port.

[0012] Furthermore, the pressure reducing valve also includes: a limiting structure, which is arranged at the second end of the second valve core component, and the limiting structure cooperates with the mounting shell to limit the moving distance of the second valve core component toward the second throttle port.

[0013] Furthermore, the pressure reducing valve further comprises: a first elastic portion, which is arranged between the static iron core and the second valve core component, and the first elastic portion is used to provide a force acting on the second valve core component toward the second throttle port.

[0014] Furthermore, the pressure reducing valve also includes: a second elastic part, which is arranged in the second chamber, and is used to provide a force to the first valve core component along the high-pressure chamber toward the first throttle port; an adjusting part, which is arranged on the main body, and one end of the adjusting part is passed through the fourth chamber, and the adjusting part applies a force to the first valve core component to move along the high-pressure chamber to the first throttle port through the second elastic part.

[0015] By applying the technical solution of the utility model, the fluid can be subjected to secondary pressure reduction through the two-stage pressure reduction process of the first pressure reduction structure and the second pressure reduction structure. In this solution, the first throttle port and the second throttle port are integrated on a main body, and the structure is simple and can occupy a smaller space. In traditional technical solutions, most of the secondary pressure reducing valves are two pressure reducing valves connected in series. With such an arrangement, the structure is relatively complex and occupies a larger space. Compared with the traditional technical solution, in this solution, the second throttle port is arranged on the side of the low-pressure chamber, and a second pressure reducing structure is formed between the first valve core component and the second throttle port, so that the pressure reducing valve structure of this solution is more compact, simpler, and occupies a smaller space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 It shows a structural schematic diagram of the first valve core component of the pressure reducing valve provided by the embodiment of the utility model when the first throttle port is opened;

[0018] Figure 2 A schematic structural diagram showing a first valve core component of a pressure reducing valve provided by an embodiment of the utility model blocking a first throttle port;

[0019] Figure 3 A structural schematic diagram of a mounting shell provided by an embodiment of the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. Body part;

[0022] 11. valve body; 111. main body section; 112. raised section; 12. end cover; 13. guide sleeve;

[0023] 20. first valve core component; 21. valve stem; 22. piston; 23. conical stopper;

[0024] 30. A second valve core component;

[0025] 40. Drive assembly;

[0026] 41. Coil components;

[0027] 411, mounting shell; 4111, outer shell; 4112, annular plate; 4113, positioning cylinder;

[0028] 412, coil assembly; 4121, coil support; 4122, coil body;

[0029] 42. Static iron core;

[0030] 50. Limiting structure;

[0031] 60. a first elastic portion;

[0032] 70. second elastic portion; 71. spring seat;

[0033] 80. Adjustment Department;

[0034] 90. a third elastic portion;

[0035] 01, inlet; 02, high pressure chamber; 021, lateral connecting hole; 03, first throttle port;

[0036] 04, low pressure chamber; 041, fifth chamber; 042, flow hole;

[0037] 05, second throttle port; 06, first chamber; 07, outlet;

[0038] 08, second chamber; 081, third chamber; 082, fourth chamber;

[0039] 091, first conductive hole; 092, second conductive hole. DETAILED DESCRIPTION

[0040] 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 creative work are within the scope of protection of the utility model.

[0041] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a pressure reducing valve, which includes a body part 10, a first valve core component 20 and a second valve core component 30. The body part 10 is provided with an inlet 01, a high pressure chamber 02, a first throttle port 03, a low pressure chamber 04, a second throttle port 05, a first chamber 06 and an outlet 07 which are connected in sequence, the second throttle port 05 is arranged at the side of the low pressure chamber 04, the body part 10 is further provided with a second chamber 08, the second chamber 08 is located at a side of the high pressure chamber 02 away from the first throttle port 03 and is connected to the first throttle port 03; the first end of the first valve core component 20 is located in the second chamber 08 and divides the second chamber 08 into a third chamber 081 and a fourth chamber 082 which are independent of each other. The third chamber 081 is arranged close to the high-pressure chamber 02, and the third chamber 081 is connected to the low-pressure chamber 04. The second end of the first valve core component 20 passes through the high-pressure chamber 02 and the first throttle port 03 in sequence and then extends into the low-pressure chamber 04. The pressure of the fluid in the third chamber 081 is adjustable to adjust the pressure of the fluid in the low-pressure chamber 04. A first pressure reduction structure is formed between the first valve core component 20 and the first throttle port 03; at least part of the second valve core component 30 is arranged in the first chamber 06, and a second pressure reduction structure is formed between the first end of the second valve core component 30 and the second throttle port 05.

[0042] By applying the technical solution of the utility model, the fluid can be subjected to secondary pressure reduction through the two-stage pressure reduction process of the first pressure reduction structure and the second pressure reduction structure. In this solution, the first throttle port and the second throttle port are integrated on a main body, and the structure is simple and can occupy a smaller space. In traditional technical solutions, most of the secondary pressure reducing valves are two pressure reducing valves connected in series. With such an arrangement, the structure is relatively complex and occupies a larger space. Compared with the traditional technical solution, in this solution, the second throttle port is arranged on the side of the low-pressure chamber, and a second pressure reducing structure is formed between the first valve core component and the second throttle port, so that the pressure reducing valve structure of this solution is more compact, simpler, and occupies a smaller space.

[0043] Furthermore, since the third chamber 081 is connected to the low-pressure chamber 04, the pressure change in the third chamber 081 will directly affect the pressure of the low-pressure chamber 04. Therefore, by adjusting the pressure of the third chamber 081, the pressure of the fluid in the low-pressure chamber 04 can be adjusted. The design of the low-pressure chamber 04 allows the fluid to be properly buffered and redistributed before entering the second throttle port 05. The adjustable pressure function of the fluid in the low-pressure chamber 04 provides the pressure reducing valve with high flexibility and precision, which helps to improve the energy efficiency, safety and reliability of the system.

[0044] In the embodiment of the present solution, since the first valve core component 20 can move relative to the main body 10, and the first valve core component 20 divides the second chamber 08 into the third chamber 081 and the fourth chamber 082 which are independent of each other, that is, the volumes of the third chamber 081 and the fourth chamber 082 are adjustable, so as to adjust the pressure of the fluid in the third chamber 081. When it is necessary to adjust the pressure of the fluid in the third chamber 081, the position of the first valve core component 20 is adjusted, so as to adjust the pressure of the fluid in the third chamber 081, and adjust the pressure of the fluid in the low-pressure chamber 04 and the pressure at the entrance to the second throttle port 05.

[0045] Specifically, when no fluid is introduced into the inlet 01, the pressures in the high-pressure chamber 02, the first throttle port 03, the low-pressure chamber 04, the second throttle port 05, the first chamber 06 and the outlet 07 are all the same; when the fluid is introduced into the inlet 01, the fluid undergoes a first-level pressure reduction after passing through the first pressure-reducing structure, and the fluid after the first-level pressure reduction enters the third chamber 081 through the low-pressure chamber 04. At this time, the pressure of the fluid in the low-pressure chamber 04, the pressure of the fluid in the third chamber 081 and the pressure at the entrance to the second throttle port 05 are the same; when the pressure of the fluid entering the inlet 01 remains unchanged, the pressure reduction state of the first-level pressure-reducing structure remains unchanged, and when it is necessary to adjust the pressure of the fluid at the entrance to the second throttle port 05, the pressure of the fluid in the third chamber 081 can be adjusted.

[0046] In this solution, the flow area of ​​the second pressure reducing structure is adjustable to adjust the pressure of the outlet 07. By adjusting the flow area of ​​the second pressure reducing structure, the fluid flow through the second throttle port 05 can be accurately controlled, thereby adjusting the pressure of the outlet 07. This adjustment capability provides the system with a high degree of flexibility to adapt to different working conditions and requirements.

[0047] Specifically, along the flow direction of the fluid, the flow area of ​​the second throttle port 05 gradually increases, the second valve core component 30 is coaxial with the second throttle port 05, the first end of the second valve core component 30 is arranged in the second throttle port 05, and the second valve core component 30 can move relative to the body 10. The design of gradually increasing the flow area allows the fluid to be steadily depressurized in the process of passing through the second throttle port 05, rather than suddenly depressurized at a single point, which helps to avoid drastic changes in pressure and corresponding impacts, reduce the mechanical impact of the fluid on the valve body, and thus reduce noise.

[0048] The second valve core component 30 can move relative to the main body 10, providing fine adjustment of the flow area of ​​the second pressure reducing structure, so that the pressure control at the outlet 07 is more accurate, adapting to different types of fluids and different downstream system requirements. In the embodiment of this solution, there is a distance between the outer side wall of the first end of the second valve core component 30 and the hole wall of the second throttle port 05, and the distance forms a second pressure reducing structure, and the second pressure reducing structure includes a second pressure reducing ring belt.

[0049] Furthermore, along the flow direction of the fluid, the cross-sectional area of ​​the first end of the second valve core component 30 gradually increases, and the taper of the first end of the second valve core component 30 is smaller than the taper of the second throttle port 05. The gradual increase in the cross-sectional area of ​​the second valve core component 30 helps to make the pressure change of the fluid more gentle, reduce the impact caused by sudden pressure changes, and improve the stability of fluid flow. The difference in taper between the second throttle port 05 and the first end of the second valve core component 30 optimizes the fluid dynamics performance, reduces the pressure loss along the way, and helps to reduce the vibration and noise generated when the fluid passes through.

[0050] In the embodiment of the present solution, the pressure reducing valve further comprises a driving assembly 40, which is disposed on the main body 10 and is drivingly connected to the second valve core component 30 to move the second valve core component 30. The driving assembly 40 can precisely control the second valve core component 30, ensure that the pressure at the outlet 07 reaches a predetermined value, and optimize the fluid pressure control of the entire system.

[0051] Specifically, the drive assembly 40 includes a coil component 41 and a static iron core 42. The coil component 41 is arranged on the main body 10, and is arranged in an annular shape on the outer periphery of the second valve core component 30. The static iron core 42 is arranged on the coil component 41, and the static iron core 42 and the second valve core component 30 are distributed along the moving direction of the second valve core component 30, and the static iron core 42 and the second valve core component 30 are magnetically matched. The combination of the coil component 41 and the static iron core 42 constitutes an electromagnetic drive system, which can accurately control the movement of the second valve core component 30, thereby realizing the regulation of the flow rate of the second pressure reducing structure. The electromagnetic drive system provides an efficient, reliable and energy-saving driving method for the pressure reducing valve, which helps to improve the performance and efficiency of the entire fluid control system.

[0052] In the embodiment of the present scheme, a first mounting port is provided on the main body 10, and the first mounting port is connected to one end of the first chamber 06 away from the second throttle port 05, and the coil component 41 includes a mounting shell 411 and a static iron core 42. Among them, one end of the mounting shell 411 is arranged at the first mounting port and is connected to the first chamber 06, and the static iron core 42 is arranged at the other end of the mounting shell 411; the coil assembly 412 is arranged in the mounting shell 411, the second end of the second valve core component 30 is penetrated in the mounting shell 411, and at least part of the static iron core 42 is penetrated in one end of the coil assembly 412 away from the first mounting port. By integrating the coil component 41 into the main body 10, effective use of space and compact layout of components can be achieved, thereby improving the overall integration. The design of the first mounting port allows the coil component 41 to be easily installed and disassembled, simplifies the maintenance and replacement process, and improves the convenience of operation. By fixing the coil component in the mounting shell 411, better mechanical support can be provided, damage caused by vibration or impact can be reduced, and the stability and reliability of the entire system can be improved.

[0053] like Figure 2 and Figure 3 As shown, specifically, the first mounting port is arranged on the first end face of the main body 10, and the mounting shell 411 includes a coaxially arranged shell 4111, an annular plate 4112 and a positioning cylinder 4113, wherein one end of the shell 4111 is sleeved on the outer periphery of the first end of the main body 10, the annular plate 4112 is annularly arranged in the shell 4111, the outer surface of the annular plate 4112 is connected to the inner side wall of the shell 4111, the annular plate 4112 abuts against the first end face of the main body 10, one end of the positioning cylinder 4113 is connected to the inner circumference of the annular plate 4112, and the other end extends toward an end away from the main body 10, the positioning cylinder 4113 is located in the shell 4111, the coil assembly 412 is arranged between the shell 4111 and the positioning cylinder 4113, and one end of the coil assembly 412 abuts against the annular plate 4112.

[0054] In the embodiment of the present solution, the coil assembly 412 includes a coil support 4121 and a coil body 4122. The coil body 4122 is wound on the coil support 4121, and the coil support 4121 is arranged between the housing 4111 and the positioning cylinder 4113, and is located on the side of the annular plate 4112 away from the main body 10. One end of the coil support 4121 abuts against the annular plate 4112, and the other end is flush with the end surface of the housing 4111. Such an arrangement can improve the compactness of the structure of the device, and the arrangement of the coil assembly 412 is convenient for installation and disassembly, simplifies the maintenance process, and makes the replacement or repair of the coil more convenient and quick.

[0055] Furthermore, the static iron core 42 includes a first section and a second section connected in sequence along the axial direction, the outer diameter of the first section is greater than the outer diameter of the second section, the second section is inserted into the coil support 4121, and the first step surface between the first section and the second section abuts against the end surface of the coil support 4121 and the shell 4111 respectively. The first step surface between the first section and the second section abuts against the end surface of the coil support 4121 and the shell respectively, and such an arrangement can provide a support point for the static iron core 42, thereby enhancing the stability and position accuracy of the entire structure. The second section is inserted into the coil support 4121, and this layout optimizes the space utilization of the coil assembly 412 and improves the compactness of the structure.

[0056] In the embodiment of this solution, the pressure reducing valve further comprises a first sealing ring, which is arranged between the end surface of the first end of the body 10 and the annular plate 4112. Such arrangement can improve the sealing performance between the body 10 and the mounting shell 411.

[0057] The pressure reducing valve further includes a second sealing ring, which is arranged at the connection position between the annular plate 4112 and the positioning cylinder 4113 and between the coil support 4121. Such an arrangement can improve the sealing performance between the coil support 4121 and the mounting shell 411.

[0058] The pressure reducing valve further includes a third sealing ring, which is arranged at the connection position between the first section and the second section and between the coil support 4121. Such an arrangement can improve the sealing performance between the coil support 4121 and the static iron core 42.

[0059] In the embodiment of the present solution, the pressure reducing valve further comprises a limiting structure 50, which is arranged at the second end of the second valve core component 30, and the limiting structure 50 cooperates with the mounting shell 411 to limit the movement distance of the second valve core component 30 toward the second throttle port 05. Such a setting can ensure that in the embodiment of the present solution, the second pressure reducing structure is always in a normally open state.

[0060] Specifically, the second valve core component 30 includes a third section and a fourth section connected in sequence along the axial direction, the diameter of the third section is greater than the diameter of the fourth section, and the second step surface formed between the third section and the fourth section forms a limiting structure 50. The third section is located at one end of the positioning cylinder 4113 away from the annular plate 4112, and the second step surface abuts against the end surface of the positioning cylinder 4113 away from the annular plate 4112 to achieve limiting.

[0061] Furthermore, the pressure reducing valve further includes a first elastic portion 60, which is disposed between the static iron core 42 and the second valve core component 30, and is used to provide a force to the second valve core component 30 toward the second throttle port 05. The first elastic portion 60 provides stability and precisely controlled force to the second valve core component 30, ensuring the accuracy and reliability of valve operation. The first elastic portion 60 can provide a certain self-regulating capability, and can maintain a stable output pressure even in the case of pressure fluctuations.

[0062] In the embodiment of this solution, a mounting hole is provided on the end surface of the static iron core 42 facing one end of the second valve core component 30, one end of the first elastic portion 60 is disposed in the mounting hole, and the other end is abutted against the end of the second valve core component 30. With such a configuration, the structure is more compact and the stability of the first elastic portion 60 can be improved.

[0063] like Figure 1 and Figure 2 As shown, further, the pressure reducing valve also includes a second elastic part 70, which is arranged in the second chamber 08, and the second elastic part 70 is used to provide a force to the first valve core component 20 along the high-pressure chamber 02 toward the first throttle port 03. The second elastic part 70 provides an automatic adjustment mechanism. When the system pressure changes, the second elastic part 70 can automatically adjust the position of the first valve core component 20 according to the preset elastic characteristics to maintain the pressure stability of the fluid in the low-pressure chamber 04. The setting of the second elastic part 70 can quickly respond to pressure changes and automatically adjust, thereby improving the stability of the pressure reducing valve operation process.

[0064] In the embodiment of the present solution, the second end of the first valve core component 20 can block or open the first throttle port 03 .

[0065] Specifically, in the embodiment of the present solution, the first valve core component 20 includes a valve stem 21 and a piston 22, the piston 22 is movably disposed in the second chamber 08, and the piston 22 is fixedly disposed at the first end of the valve stem 21, and the piston 22 separates the second chamber 08 into a third chamber 081 and a fourth chamber 082 that are independent of each other. The first valve core component 20 also includes a conical stopper 23, which is disposed at an end of the valve stem 21 away from the piston 22, and the conical stopper 23 is located in the low-pressure chamber 04, and a first pressure reduction structure is formed between the conical stopper 23 and the first throttle port 03.

[0066] Furthermore, the first valve core component 20 has a first extreme position and a second extreme position which are relatively set. When the first valve core component 20 is in the first extreme position, the piston 22 cooperates with the stopper at one end of the second chamber 08 close to the high-pressure chamber 02, and the first throttle port 03 is in an open state; when the first valve core component 20 is in the second extreme position, the conical stopper 23 cooperates with the stopper at one end of the first throttle port 03 away from the high-pressure chamber 02, and the first throttle port 03 is in a blocked state; when the first valve core component 20 moves from the first extreme position to the second extreme position, the first throttle port 03 is in an open state.

[0067] Specifically, after the high-pressure fluid is throttled and reduced in pressure by the first pressure-reducing structure, it enters the low-pressure chamber 04 and then enters the third chamber 081; if the high-pressure fluid continues to enter, and the fluid pressure in the third chamber 081 is greater than the elastic force of the second elastic part 70, the first valve core component 20 gradually moves to the second limit position and closes the first throttling port 03, and the high-pressure fluid cannot continue to enter the low-pressure chamber 04. The fluid in the low-pressure chamber 04 flows into the first chamber 06 through the second pressure-reducing structure and is discharged through the outlet 07; as the fluid in the low-pressure chamber 04 is continuously discharged, the pressure of the fluid in the low-pressure chamber 04 and the third chamber 081 decreases, and the second elastic part 70 drives the piston 22 to move toward the direction of the high-pressure chamber 02 until the conical stop 23 opens the first throttling port 03, and the fluid in the high-pressure chamber 02 enters the low-pressure chamber 04 again through the first pressure-reducing structure, thereby realizing cyclic pressure reduction.

[0068] In the embodiment of the present solution, the pressure reducing valve further comprises an adjusting portion 80, which is arranged on the main body 10, one end of which is inserted into the fourth chamber 082, and the adjusting portion 80 is used to apply a force to the second elastic portion 70 toward the high pressure chamber 02. By operating the adjusting portion 80, the elastic force of the second elastic portion 70 on the first valve core component 20 can be manually adjusted, and the position of the first valve core component 20 can be more accurately controlled, thereby finely adjusting the pressure of the fluid in the third chamber 081, and then adjusting the pressure of the fluid in the low pressure chamber 04, so as to adjust the pressure at the entrance of the second throttle port 05.

[0069] like Figure 1 and Figure 2 As shown, further, the main body 10 includes a valve body 11, an end cover 12 and a guide sleeve 13. The valve body 11 includes a main body section 111 and a raised section 112 connected to each other, the axial direction of the main body section 111 is perpendicular to the axial direction of the raised section 112, and the raised section 112 is arranged on the side wall of one end of the main body section 111.

[0070] The low-pressure chamber 04 includes a fifth chamber 041 and a flow hole 042 that are interconnected. The inlet 01 is arranged on the side of the main body section 111. The main body section 111 is provided with an installation chamber and a fifth chamber 041 that are connected in a step-like manner along the axial direction. The flow area of ​​the installation chamber is greater than the flow area of ​​the fifth chamber 041. A third step surface is formed between the installation chamber and the fifth chamber 041. One end of the installation chamber away from the raised section 112 forms a second installation opening. The guide sleeve 13 is arranged in the installation chamber. One end of the end cover 12 is inserted into the second installation opening and cooperates with a stopper at one end of the guide sleeve 13. A second chamber 08 is formed between one end of the guide sleeve 13 and the end cover 12. The other end of the guide sleeve 13 cooperates with the stopper at the third step surface.

[0071] That is, in the embodiment of the present scheme, the fourth chamber 082 , the third chamber 081 , the high-pressure chamber 02 , the first throttle port 03 and the fifth chamber 041 are sequentially connected along the axial direction of the main body section 111 .

[0072] Specifically, a lateral connecting hole 021 is also provided on the main body section 111, one end of the lateral connecting hole 021 is connected to the inlet, and the other end is connected to the high-pressure chamber 02, and the lateral connecting hole 021 is arranged in a circumferential ring shape on the outer wall of the main body section 111 along the main body section 111.

[0073] In the embodiment of this scheme, the guide sleeve 13 is provided with a guide hole, a high pressure chamber 02 and a first throttle port 03 which are connected in sequence along the axial direction. The guide hole is connected with the third chamber 081, and the valve stem 21 passes through the guide sleeve 13 and is guided and sealed with the guide hole.

[0074] Furthermore, the main body section 111 is provided with a first conducting hole 091, one end of which is connected to the side of the circulation hole 042, and the other end of which extends to the side wall of the installation cavity. The guide sleeve 13 is also provided with a second conducting hole 092, one end of which extends to the outer side wall of the guide sleeve 13 and is connected to the first conducting hole 091, and the other end of which is connected to the third chamber 081.

[0075] In the embodiment of the present solution, the pressure reducing valve further includes a third elastic portion 90, wherein the third elastic portion 90 is disposed in the fifth chamber 041 and is located at an end of the conical stopper 23 away from the piston 22, and the third elastic portion 90 is used to provide a force toward the piston 22 to the first valve core component 20. The elastic force of the third elastic portion 90 is smaller than the elastic force of the second elastic portion 70. Such an arrangement can improve the stability of the fluid during the circulation process.

[0076] Further, the piston 22 is located in the end cover 12 and cooperates with the end cover 12 guide. The second elastic portion 70 is located in the end cover 12 and is located at an end of the piston 22 away from the valve stem 21. The pressure reducing valve also includes a spring seat 71, which is arranged in the end cover 12 and is located at an end of the second elastic portion 70 away from the piston 22, and the second elastic portion 70 is mounted on the spring seat 71.

[0077] Specifically, a threaded hole is provided on the end surface of the end cover 12 , and the adjusting portion 80 includes an adjusting bolt, one end of which passes through the threaded hole and abuts against the spring seat 71 , and the adjusting bolt is threadably matched with the threaded hole.

[0078] Furthermore, the flow hole 042 extends along the axial direction of the protruding section 112 , the second throttling port 05 , the first chamber 06 and the outlet 07 are respectively arranged on the protruding section 112 , the flow hole 042 , the second throttling port 05 and the first chamber 06 are respectively coaxial with the protruding section 112 , and the outlet 07 is arranged on the side of the protruding section 112 .

[0079] 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.

[0080] 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 only 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.

[0081] 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.

[0082] 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.

[0083] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0084] 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: The main body (10) is provided with an inlet (01), a high-pressure chamber (02), a first throttle port (03), a low-pressure chamber (04), a second throttle port (05), a first chamber (06) and an outlet (07) which are connected in sequence, wherein the second throttle port (05) is arranged on the side of the low-pressure chamber (04), and the main body (10) is further provided with a second chamber (08), which is located on a side of the high-pressure chamber (02) away from the first throttle port (03); A first valve core component (20), wherein the first end of the first valve core component (20) is located in the second chamber (08) and divides the second chamber (08) into a third chamber (081) and a fourth chamber (082) which are independent of each other, wherein the third chamber (081) is arranged close to the high-pressure chamber (02), and the third chamber (081) is communicated with the low-pressure chamber (04), and the second end of the first valve core component (20) sequentially passes through the high-pressure chamber (02) and the first throttle port (03) and then extends into the low-pressure chamber (04), and the pressure of the fluid in the third chamber (081) is adjustable to adjust the pressure of the fluid in the low-pressure chamber (04), and a first pressure reducing structure is formed between the first valve core component (20) and the first throttle port (03); A second valve core component (30), at least a portion of the second valve core component (30) is arranged in the first chamber (06), and a second pressure reduction structure is formed between the first end of the second valve core component (30) and the second throttle port (05).

2. The pressure reducing valve according to claim 1, characterized in that: The flow area of ​​the second pressure reducing structure is adjustable to adjust the pressure of the outlet (07).

3. The pressure reducing valve according to claim 2, characterized in that: Along the flow direction of the fluid, the flow area of ​​the second throttle port (05) gradually increases, the first end of the second valve core component (30) is inserted into the second throttle port (05), and the second valve core component (30) can move relative to the main body (10).

4. The pressure reducing valve according to claim 3, characterized in that: Along the flow direction of the fluid, the cross-sectional area of ​​the first end of the second valve core component (30) gradually increases, and the taper of the first end of the second valve core component (30) is smaller than the taper of the second throttle port (05).

5. The pressure reducing valve according to claim 3, characterized in that: The pressure reducing valve further comprises: A driving assembly (40) is arranged on the main body (10), and the driving assembly (40) is drivingly connected to the second valve core component (30) so as to move the second valve core component (30).

6. The pressure reducing valve according to claim 5, characterized in that: The driving assembly (40) comprises: A coil component (41) is arranged on the main body (10) and is annularly arranged on the outer periphery of the second valve core component (30); A static iron core (42) is arranged on the coil component (41), the static iron core (42) and the second valve core component (30) are distributed along the moving direction of the second valve core component (30), and the static iron core (42) and the second valve core component (30) are magnetically matched.

7. The pressure reducing valve according to claim 6, characterized in that: The main body (10) is provided with a first mounting opening, the first mounting opening being in communication with an end of the first chamber (06) away from the second throttle opening (05), and the coil component (41) comprises: A mounting shell (411), one end of the mounting shell (411) being arranged at the first mounting opening and communicating with the first chamber (06), and the static iron core (42) being arranged at the other end of the mounting shell (411); The coil assembly (412) is arranged in the installation shell (411), the second end of the second valve core component (30) is inserted into the installation shell (411), and at least a part of the static iron core (42) is inserted into an end of the coil assembly (412) away from the first installation opening.

8. The pressure reducing valve according to claim 7, characterized in that: The pressure reducing valve further comprises: A limiting structure (50) is arranged at the second end of the second valve core component (30), and the limiting structure (50) cooperates with the mounting shell (411) to limit the movement distance of the second valve core component (30) toward the second throttle port (05).

9. The pressure reducing valve according to claim 6, characterized in that: The pressure reducing valve further comprises: The first elastic part (60) is arranged between the static iron core (42) and the second valve core component (30), and the first elastic part (60) is used to provide a force acting on the second valve core component (30) toward the second throttle port (05).

10. The pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve further comprises: A second elastic portion (70) is disposed in the second chamber (08), and the second elastic portion (70) is used to provide a force to the first valve core component (20) in a direction from the high-pressure chamber (02) to the first throttle port (03); The regulating portion (80) is arranged on the main body (10), and one end of the regulating portion (80) is inserted into the fourth chamber (082). The regulating portion (80) applies a force to the first valve core component (20) to move along the direction from the high-pressure chamber (02) to the first throttle port (03) through the second elastic portion (70).

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