A high-flow pressure reducing valve

Abstract

A high-flow pressure reducing valve includes a valve body, a valve core, a medium inlet, a medium outlet, and a pressure regulating assembly. The valve body is provided with a valve seat for forming a sealing connection with the valve core under normal pressure. The valve seat is provided with a sealing reinforcement assembly, which includes a mounting groove on the valve seat. A first sealing ring is provided in the mounting groove, and a second sealing ring is provided above the first sealing ring. The second sealing ring includes a support portion and an elastic portion located outside the sealing portion. The elastic portion is arc-shaped and deforms under the pressure of the medium, forming a side sealing connection with the valve core.

Description

Technical Field

[0001] This utility model relates to a high-flow pressure reducing valve, belonging to the field of valves. Background Technology

[0002] A pressure reducing valve is a control device used to regulate fluid pressure. It is typically installed in fluid delivery pipelines and regulates the outlet pressure by altering the fluid passage area through the fit between the valve core and seat. High-flow-rate pressure reducing valves, due to their compact structure and relatively smooth fluid flow, are used in water supply, gas transmission, and other fluid systems requiring pressure regulation. In existing high-flow-rate pressure reducing valve structures, the valve core and seat typically employ an end-face seal, relying on the contact between the valve core and seat to block fluid flow when the equipment is closed.

[0003] However, in actual use, due to factors such as fluid pressure changes, wear caused by long-term valve core operation, and the elastic decay of the sealing components, insufficient contact can easily occur between the valve core and the valve seat, leading to media leakage when the pressure reducing valve is closed. Furthermore, traditional sealing structures require high precision in component machining; even slight misalignment of the valve core or seat can affect sealing performance. In addition, the pressure regulating structure of some existing pressure reducing valves exhibits unstable spring compression during regulation, affecting the accuracy of outlet pressure regulation. Therefore, there is an urgent need to improve existing technology to address the problems of insufficient sealing stability and low pressure regulation reliability in the closed state of high-flow pressure reducing valves. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a high-flow pressure reducing valve.

[0005] A high-flow pressure reducing valve includes a valve body, a valve core, a medium inlet, a medium outlet, and a pressure regulating assembly. The valve body is provided with a valve seat for forming a sealing connection with the valve core under normal pressure. The valve seat is provided with a sealing reinforcement assembly, which includes a mounting groove on the valve seat. A first sealing ring is provided in the mounting groove, and a second sealing ring is provided above the first sealing ring. The second sealing ring includes a support portion and an elastic portion located outside the sealing portion. The elastic portion is arc-shaped and deforms under the pressure of the medium, forming a side sealing connection with the valve core.

[0006] Furthermore, the first sealing ring is L-shaped, and the elastic part of the second sealing ring abuts against the inner wall of the first sealing ring.

[0007] Furthermore, the bottom of the first sealing ring is provided with a limiting part, which extends to the end face of the valve seat and is connected to it for limiting.

[0008] Furthermore, the bottom of the support portion is provided with a snap-fit ​​portion, and the first sealing ring is provided with a snap-fit ​​groove that engages with the snap-fit ​​portion. The snap-fit ​​groove is a dovetail groove.

[0009] Furthermore, the second sealing ring is made of a deformable material.

[0010] Furthermore, the pressure regulating assembly includes a diaphragm that abuts against the valve core, an adjusting spring, and an adjusting rod. The adjusting rod is rotatably mounted in the valve body. One end of the adjusting spring abuts against the diaphragm, and the other end abuts against an adjusting plate. The end of the adjusting rod abuts against the adjusting plate. The adjusting rod compresses or extends the adjusting spring by rotating, thereby adjusting the position of the diaphragm and the valve core.

[0011] More specifically, the end of the adjusting rod extends out of the valve body and is detachably connected to a handle.

[0012] The beneficial effects of this invention are as follows: By setting a sealing reinforcement component at the valve seat position, a sealing structure combining end face sealing and side sealing is formed between the valve core and the valve seat. In the valve closed state, the second sealing ring can maintain contact with the valve core using its own elastic structure. When medium pressure acts on the second sealing ring, the elastic part undergoes adaptive deformation and conforms to the valve core, thereby improving the sealing stability in the valve core closed state. Compared to a structure that relies solely on rigid contact between the valve core and the valve seat, this solution can reduce the risk of seal failure due to component wear, assembly errors, or pressure changes. Simultaneously, the first sealing ring can provide support for the second sealing ring, enabling the second sealing ring to maintain a relatively stable positional relationship during long-term pressure. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0014] Figure 1 This is a top view of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 Enlarged detail view of point A in the middle; In the diagram, 1 is the valve body; 11 is the medium inlet; 12 is the medium outlet; 13 is the valve seat; 131 is the mounting groove; 2 is the valve core; 3 is the sealing reinforcement assembly; 31 is the first sealing ring; 311 is the limiting part; 312 is the snap-fit ​​groove; 32 is the second sealing ring; 321 is the support part; 322 is the elastic part; 323 is the snap-fit ​​part; 4 is the pressure regulating assembly; 41 is the diaphragm; 42 is the adjusting spring; 43 is the adjusting plate; 44 is the adjusting rod; and 45 is the handle. Detailed Implementation

[0015] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0016] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0017] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0018] like Figure 1-3 As shown, this is an embodiment of a high-flow pressure reducing valve of the present invention, including a valve body 1, a valve core 2, a medium inlet 11, a medium outlet 12, and a pressure regulating component 4.

[0019] The valve body 1 serves as the overall mounting base for the pressure reducing valve, and its interior forms a channel for the flow of the medium. A medium inlet 11 and a medium outlet 12 are respectively located at both ends of the valve body 1. External medium enters the valve body 1 through the medium inlet 11, and after being regulated by the valve core 2, it is output through the medium outlet 12. The valve core 2 is movably mounted inside the valve body 1 to change the opening degree of the fluid channel, thereby achieving outlet pressure regulation.

[0020] The valve body 1 has a valve seat 13 inside, which is used to cooperate with the valve core 2 to form a sealed connection in the closed state. When the valve core 2 moves to the closed position, the valve core 2 and the valve seat 13 abut against each other, thus restricting the medium passage.

[0021] like Figure 2 and Figure 3As shown, a sealing reinforcement component 3 is provided on the valve seat 13. The sealing reinforcement component 3 includes a mounting groove 131 disposed on the valve seat 13. The mounting groove 131 is disposed around the valve seat 13 and is used to install a sealing structure. A first sealing ring 31 is disposed inside the mounting groove 131. The first sealing ring 31 is installed in the mating area between the valve seat 13 and the valve core 2 and is used as a supporting base for the sealing reinforcement component 3.

[0022] A second sealing ring 32 is disposed above the first sealing ring 31. The second sealing ring 32 includes a support portion 321 and an elastic portion 322 disposed outside the support portion 321. The elastic portion 322 is arranged in an arc shape and extends toward the valve core 2. When the valve core 2 is in the closed state, the second sealing ring 32 can form a contact connection with the valve core 2.

[0023] During operation, when the medium enters the valve body 1 through the medium inlet 11, the medium pressure acts on the elastic part 322 of the second sealing ring 32, causing the elastic part 322 to undergo adaptive deformation. The outer surface of the elastic part 322 fits against the side wall of the valve core 2, thereby forming a lateral sealing structure. During the closing process of the valve core 2, the first sealing ring 31 provides support for the second sealing ring 32, enabling the second sealing ring 32 to maintain a stable position.

[0024] With the above structure, when the valve core 2 is closed, it can not only achieve sealing by relying on the cooperation between the valve core 2 and the valve seat 13, but also form an auxiliary seal between the second sealing ring 32 and the valve core 2, thereby improving the adaptability of the sealing structure to changes in medium pressure and fit errors.

[0025] Optionally, in some embodiments, the first sealing ring 31 is L-shaped, and the elastic portion 322 of the second sealing ring 32 abuts against the inner wall of the first sealing ring 31.

[0026] The first sealing ring 31 has an L-shaped cross-section structure, including a horizontal support portion and a vertical support portion. The horizontal portion is used for installation inside the mounting groove 131, and the vertical portion forms a support surface. After the second sealing ring 32 is installed, the elastic portion 322 abuts against the inner wall of the first sealing ring 31, so that the first sealing ring 31 can restrict the movement direction of the second sealing ring 32.

[0027] Specifically, when the medium pressure acts on the elastic part 322, the elastic part 322 will expand outward due to the pressure. The inner wall of the first sealing ring 31 supports the elastic part 322, so that the elastic part 322 can maintain the contact state with the valve core 2 and reduce the positional displacement of the second sealing ring 32 caused by pressure changes.

[0028] As an alternative embodiment, those skilled in the art may also configure the first sealing ring 31 as an annular structure with an arc-shaped support surface, thereby achieving the limiting effect on the second sealing ring 32 by changing the shape of the support surface.

[0029] Optionally, in some embodiments, the bottom of the first sealing ring 31 is provided with a limiting part 311, which extends to the end face of the valve seat 13 and is limited thereto.

[0030] The limiting part 311 is located at the bottom of the first sealing ring 31 and extends toward the end face of the valve seat 13, so that the first sealing ring 31 can form an axial limiting relationship with the valve seat 13 after installation.

[0031] Specifically, when installing the sealing reinforcement component 3, the first sealing ring 31 is embedded inside the mounting groove 131 of the valve seat 13, and the limiting part 311 abuts against the end face of the valve seat 13, so that the first sealing ring 31 is restricted by the structure of the valve seat 13, and the first sealing ring 31 is prevented from moving in the axial direction when subjected to medium pressure.

[0032] As an alternative embodiment, those skilled in the art can also use structures such as positioning protrusions and annular flanges to limit the connection of the first sealing ring 31.

[0033] Optionally, in some embodiments, the bottom of the support portion 321 is provided with a snap-fit ​​portion 323, and the first sealing ring 31 is provided with a snap-fit ​​groove 312 that snaps into the snap-fit ​​portion 323, wherein the snap-fit ​​groove 312 is a dovetail groove.

[0034] The snap-fit ​​part 323 is located at the bottom of the support part 321 of the second sealing ring 32, and the first sealing ring 31 is provided with a snap-fit ​​groove 312 at the corresponding position. The snap-fit ​​groove 312 adopts a dovetail groove structure, so that the second sealing ring 32 can form a stable connection with the first sealing ring 31.

[0035] Specifically, during installation, the second sealing ring 32 moves along the installation direction of the first sealing ring 31, so that the snap-fit ​​part 323 is embedded in the snap-fit ​​groove 312, and the snap-fit ​​structure restricts the movement of the second sealing ring 32 relative to the first sealing ring 31.

[0036] This structure enables the sealing reinforcement component 3 to form a modular installation structure, which facilitates the installation and positioning of the sealing components, while improving the stability of the second sealing ring 32 during long-term use.

[0037] As an alternative embodiment, those skilled in the art can also use a connection structure in which an annular protrusion and an annular groove cooperate to replace the dovetail groove snap-fit ​​structure.

[0038] Optionally, in some embodiments, the second sealing ring 32 is made of a deformable material.

[0039] The second sealing ring 32 is made of a material that can produce elastic deformation, so that it can deform when subjected to medium pressure or valve core 2 extrusion force, and return to its original shape after the external force is removed.

[0040] Specifically, when the valve core 2 moves to the closed position, the second sealing ring 32 is compressed or expanded by the force exerted by the valve core 2, allowing the elastic part 322 to conform to the surface of the valve core 2. When the valve core 2 opens, the force decreases, and the second sealing ring 32 returns to its initial state.

[0041] As an alternative embodiment, those skilled in the art can select elastic sealing materials with different properties according to the type of working medium to meet the application requirements in different fluid environments.

[0042] Optionally, in some embodiments, the pressure regulating assembly 4 includes a diaphragm 41 that abuts against the valve core 2, an adjusting spring 42, and an adjusting rod 44. The adjusting rod 44 is rotatably mounted inside the valve body 1. One end of the adjusting spring 42 abuts against the diaphragm 41, and the other end abuts against an adjusting plate 43. The end of the adjusting rod 44 abuts against the adjusting plate 43. The adjusting rod 44 compresses or extends the adjusting spring 42 by rotating, thereby adjusting the position of the diaphragm 41 and the valve core 2.

[0043] like Figure 2 As shown, the pressure regulating component 4 is disposed inside the valve body 1 and is used to adjust the position of the valve core 2 according to the change in outlet pressure. The diaphragm 41 abuts against the valve core 2 to transmit the force generated by the pressure change; the adjusting spring 42 is disposed between the diaphragm 41 and the adjusting plate 43 to provide elastic force.

[0044] The adjusting rod 44 is rotatably mounted inside the valve body 1, and its end abuts against the adjusting plate 43. When the operator rotates the adjusting rod 44, the adjusting rod 44 pushes the adjusting plate 43 to move, causing the adjusting spring 42 to compress or extend. The elastic force of the adjusting spring 42 is transmitted to the valve core 2 through the diaphragm 41, thereby changing the position of the valve core 2.

[0045] As an alternative embodiment, those skilled in the art can also use a spiral adjustment structure, a cam adjustment structure, or other methods to change the force of the adjusting spring 42.

[0046] Optionally, in some embodiments, the end of the adjusting rod 44 extends out of the valve body 1 and is detachably connected to a handle 45.

[0047] The handle 45 is located at the end of the adjusting rod 44 that extends out of the valve body 1, allowing the operator to easily rotate the adjusting rod 44. The handle 45 and the adjusting rod 44 are detachably connected, allowing them to be installed or removed as needed.

[0048] Specifically, when it is necessary to adjust the outlet pressure, the operator rotates the handle 45 to drive the adjusting rod 44 to rotate. The adjusting rod 44 pushes the adjusting plate 43 to move, causing the adjusting spring 42 to change its compression state, thereby completing the pressure adjustment.

[0049] As an alternative embodiment, those skilled in the art may also provide a tool interface at the end of the adjusting rod 44, and drive the adjusting rod 44 to rotate using a special tool.

[0050] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0051] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A large flow pressure reducing valve characterized by: The device includes a valve body, a valve core, a medium inlet, a medium outlet, and a pressure regulating assembly. The valve body is provided with a valve seat for forming a sealed connection with the valve core under normal pressure. The valve seat is provided with a sealing reinforcement assembly, which includes a mounting groove on the valve seat. A first sealing ring is provided in the mounting groove, and a second sealing ring is provided above the first sealing ring. The second sealing ring includes a support portion and an elastic portion located outside the sealing portion. The elastic portion is arc-shaped and deforms under the pressure of the medium, forming a side sealing connection with the valve core.

2. The large flow pressure reducing valve according to claim 1, wherein: The first sealing ring is L-shaped, and the elastic part of the second sealing ring abuts against the inner wall of the first sealing ring.

3. The high-flow-rate pressure reducing valve as described in claim 2, characterized in that: The bottom of the first sealing ring is provided with a limiting part, which extends to the end face of the valve seat and is connected to it for limiting.

4. The high-flow-rate pressure reducing valve as described in claim 2, characterized in that: The bottom of the support part is provided with a snap-fit ​​part, and the first sealing ring is provided with a snap-fit ​​groove that snaps into the snap-fit ​​part. The snap-fit ​​groove is a dovetail groove.

5. The high-flow-rate pressure reducing valve as described in claim 1 or 2, characterized in that: The second sealing ring is made of a deformable material.

6. The high-flow-rate pressure reducing valve as described in claim 1, characterized in that: The pressure regulating assembly includes a diaphragm that abuts against the valve core, an adjusting spring, and an adjusting rod. The adjusting rod is rotatably mounted in the valve body. One end of the adjusting spring abuts against the diaphragm, and the other end abuts against an adjusting plate. The end of the adjusting rod abuts against the adjusting plate. The adjusting rod compresses or extends the adjusting spring by rotating, thereby adjusting the position of the diaphragm and the valve core.

7. The high-flow-rate pressure reducing valve as described in claim 6, characterized in that: The end of the adjusting rod extends out of the valve body and is detachably connected to a handle.

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