One-way valve installed in part

Abstract

The utility model provides a one-way valve installed in a part, the part is internally provided with an installation cavity, a liquid inlet flow channel and a liquid outlet flow channel, the liquid inlet flow channel and the liquid outlet flow channel are located on the two sides of the installation cavity in the first direction, the liquid inlet flow channel and the liquid outlet flow channel are communicated with the installation cavity, and the one-way valve is arranged in the installation cavity and comprises an annular structure and a valve element. The annular structure extends in the first direction and defines a containing cavity, the two ends, in the first direction, of the annular structure abut against the cavity wall of the mounting cavity correspondingly, and abutting protrusions are arranged at the position, close to the liquid inlet flow channel, of the inner side of the side wall of the annular structure in the circumferential direction of the annular structure. The outer side of the side wall of the annular structure is sleeved with a first sealing piece, and the valve element is arranged in the containing cavity and can move towards the liquid outlet flow channel or the liquid inlet flow channel in the first direction. The utility model solves the problem that the connection part of the one-way valve and the pipeline is easy to leak.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile manufacturing, especially to a one-way valve installed in a part. BACKGROUND

[0002] In the automobile industry, the one-way valve plays a crucial role as a core component in fluid control systems. It not only regulates and controls the flow direction of fluids within the system but also ensures stable fluid flow in the pipeline. However, in practical applications, especially in the context of automobiles that run for a long time and in complex and variable environments, the connection between the one-way valve and the pipeline often becomes a weak link in the system.

[0003] Due to the continuous vibration and impact during the operation of the automobile, combined with the high-speed flow of fluid in the pipeline and frequent pressure changes, these external factors act on the connection between the one-way valve and the pipeline, causing the connection to gradually wear and age. Over time, this wear and aging phenomenon becomes more severe, eventually causing a significant decline in the sealing performance of the connection, resulting in leakage problems.

[0004] Leakage not only leads to waste of fluid but also can cause a series of serious consequences. For example, in the automobile cooling system, if the one-way valve and the pipeline connection leak, the refrigerant will continuously flow out, causing the vehicle thermal management system to malfunction, which not only affects the comfort of the passenger compartment but also can cause the motor or battery system to overheat, leading to serious consequences.

[0005] Therefore, in view of the problem of easy leakage of the connection between the one-way valve and the pipeline in the prior art, a new type of one-way valve design is needed to improve the wear resistance and sealing performance of the connection. This design should be able to effectively resist vibration and impact during the operation of the automobile, ensure stable fluid flow in the pipeline, and reduce the risk of leakage, thereby improving the overall performance and reliability of the automobile. SUMMARY

[0006] The utility model aims at providing a one-way valve installed in a part to solve the problem of easy leakage of the connection between the one-way valve and the pipeline in the prior art.

[0007] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a one-way valve installed in a part, the part is internally provided with an installation cavity and liquid inlet flow channels and liquid outlet flow channels located on both sides of the installation cavity in a first direction, the liquid inlet flow channels and the liquid outlet flow channels are both communicated with the installation cavity, wherein the one-way valve is arranged in the installation cavity and comprises an annular structure and a valve core, the annular structure extends along the first direction and is enclosed into a containing cavity, both ends of the annular structure in the first direction are respectively abutted with cavity walls of the installation cavity, so that the liquid inlet flow channels and the liquid outlet flow channels are respectively communicated with the containing cavity, an abutment protrusion is arranged on the inner side of the side wall of the annular structure and close to the liquid inlet flow channels along the circumferential direction, a first sealing element is sleeved on the outer side of the side wall of the annular structure, the valve core is arranged in the containing cavity and can move towards the liquid outlet flow channels or the liquid inlet flow channels along the first direction, so that the valve core is separated from or abutted with and sealedly connected with the abutment protrusion.

[0008] As a further improvement of the utility model, the annular structure is a plastic structure.

[0009] As a further improvement of the utility model, the annular structure comprises a first annular part and a second annular part arranged in sequence along the first direction, the first annular part and the second annular part are connected through a buckle structure, the first annular part is arranged close to the liquid inlet flow channels, the second annular part is arranged close to the liquid outlet flow channels, and the abutment protrusion is arranged on the inner side of the side wall of the first annular part along the circumferential direction of the first annular part.

[0010] As a further improvement of the utility model, the buckle structure comprises a buckle and a hook matched with each other, the buckle is arranged on the first annular part or the second annular part, and the hook is arranged on the second annular part or the first annular part.

[0011] As a further improvement of the utility model, the one-way valve further comprises an elastic element, the elastic element is arranged in the containing cavity and is used at least for abutting the valve core on the abutment protrusion so that the valve core and the abutment protrusion are sealedly connected.

[0012] As a further improvement of the utility model, the second annular part comprises an annular wall and a mounting structure arranged on the inner side of the annular wall, the mounting structure comprises a connecting part connected with the annular wall and a fixing part arranged on one side of the connecting part and facing the liquid inlet flow channels, the fixing part extends and is arranged towards the liquid inlet flow channels, a flow channel is arranged on the connecting part and penetrates in the first direction, the valve core is sleeved on the fixing part, and in the first direction, the elastic element is connected between the valve core and the fixing part.

[0013] As a further improvement of an embodiment of the present application, the valve core has a first end facing the fixed part, the first end is provided with a first groove, the groove side wall of the first groove is sleeved on the fixed part and can slide relative to the fixed part, one end of the elastic member is connected with the groove bottom wall of the first groove, and the other end is connected with the fixed part.

[0014] As a further improvement of an embodiment of the present application, the fixed part is provided with a second groove on one end facing the groove bottom wall of the first groove, and the other end of the elastic member is connected with the groove bottom wall of the second groove.

[0015] As a further improvement of an embodiment of the present application, the valve core comprises a valve core body and a second sealing member formed in a first direction, one end of the valve core body facing the fixed part forms the first end of the valve core, and the second sealing member is sleeved on the side wall of the valve core body, when the valve core abuts against and is sealingly connected with the abutting protrusion, the valve core body abuts against the abutting protrusion, and the second sealing member abuts against the valve core body and the abutting protrusion respectively to seal both.

[0016] As a further improvement of an embodiment of the present application, the valve core comprises a valve core body and a second sealing member formed in a first direction, one end of the valve core body facing the fixed part forms the first end of the valve core, and the second sealing member is sleeved on the side wall of the valve core body, when the valve core abuts against and is sealingly connected with the abutting protrusion, the valve core body abuts against the abutting protrusion, and the second sealing member abuts against the valve core body and the abutting protrusion respectively to seal both.

[0017] Compared with the prior art, the present application has the beneficial effects that:

[0018] The one-way valve is arranged in the mounting cavity, and the two ends of the annular structure abut against the mounting cavity, so that the liquid inlet flow channel and the liquid outlet flow channel are connected with the containing cavity and are in communication, thereby effectively solving the problem of leakage of the connection part of the one-way valve and the connecting pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structure diagram of a one-way valve is provided for an embodiment of the present application;

[0020] Figure 2 A sectional view of the one-way valve in the embodiment is provided for a part of the present application; Figure 1

[0021] A structure diagram of a part is provided for the embodiment; Figure 3 Figure 2

[0022] ​​Figure 4 For Figure 2 Structure diagram of the one-way valve.

[0023] The above description of drawings includes the following reference signs:

[0024] 100, part;

[0025] 101, mounting cavity;

[0026] 102, liquid inlet channel;

[0027] 103, liquid outlet channel;

[0028] 2, one-way valve;

[0029] 21, annular structure;

[0030] 211, containing cavity;

[0031] 212, first annular member;

[0032] 2121, abutting protrusion;

[0033] 2122, first sealing member;

[0034] 213, second annular member;

[0035] 2131, annular wall;

[0036] 2132, mounting structure;

[0037] 21321, connecting portion;

[0038] 21322, fixed portion;

[0039] 213221, second groove;

[0040] 214, buckle structure;

[0041] 2141, clamping hook;

[0042] 2142, buckle;

[0043] 22, valve core;

[0044] 221, valve core body;

[0045] 2211, first end;

[0046] 22111, first groove;

[0047] 2212, clamping groove;

[0048] 222, second sealing member;

[0049] 23, elastic member;

[0050] A1, first direction. DETAILED DESCRIPTION

[0051] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0052] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0053] In the present application, unless otherwise stated, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present application.

[0054] In order to solve the problem that the connection part of the one-way valve and the pipeline is prone to leakage in the prior art, the present application provides a new one-way valve.

[0055] The present application will be described in further detail below in combination with the drawings and specific embodiments.

[0056] As shown in Figures 1-4 The present application provides a one-way valve 2 installed in a part 100, the part 100 is provided with a mounting cavity 101 and liquid inlet flow channels 102 and liquid outlet flow channels 103 located on both sides of the mounting cavity 101 in a first direction, the liquid inlet flow channels 102 and the liquid outlet flow channels 103 are both communicated with the mounting cavity 101.

[0057] The one-way valve 2 is arranged in the mounting cavity 101 and includes an annular structure 21 and a valve core 22, the annular structure 21 extends along the first direction and is enclosed into an accommodating cavity 211, both ends of the annular structure 21 in the first direction are respectively abutted with the cavity wall of the mounting cavity 101, so that the liquid inlet flow channels 102 and the liquid outlet flow channels 103 are respectively connected with the accommodating cavity 211 and communicated, the inner side of the side wall of the annular structure 21 is provided with an abutting protrusion 2121 near the liquid inlet flow channels 102 along the circumferential direction, and the outer side of the side wall of the annular structure 21 is provided with a first sealing member 2122, in the present application, the function of the first sealing member 2122 is mainly to seal the gap between the side wall of the annular structure 21 and the cavity wall of the mounting cavity 101, so that the two can be sealingly connected, avoiding liquid leakage between the side wall of the annular structure 21 and the cavity wall of the mounting cavity 101.

[0058] The valve core 22 is arranged in the accommodating cavity 211 and can move in the first direction towards the liquid outlet flow channel 103 or the liquid inlet flow channel 102, so that the valve core 22 is separated from the abutting protrusion 2121, or abuts against and is sealingly connected with the abutting protrusion 2121, thereby realizing the opening or closing of the one-way valve 2.

[0059] It should be noted that, as shown in Figure 2 The direction represented by A1 is the first direction. In the utility model, the specific direction of the first direction A1 is not limited, but it should be understood that the first direction A1 is usually the axial direction of the annular structure 21.

[0060] In the utility model, optionally, the mounting cavity 101 and the liquid inlet flow channel 102 and the liquid outlet flow channel 103 connected with the mounting cavity 101 can be formed on the part by casting, the one-way valve 2 is installed in the mounting cavity 101, the first sealing member 2122 can seal the gap between the side wall of the annular structure 21 and the cavity wall of the mounting cavity 101, and the two ends of the annular structure 21 abut against the cavity wall of the mounting cavity 101 respectively, so that the liquid inlet flow channel 102 and the liquid outlet flow channel 103 are respectively connected with and communicated with the accommodating cavity 211, and the opening or closing of the one-way valve 2 is controlled by the movement of the valve core 22 in the first direction A1 towards the liquid outlet flow channel 103 or towards the liquid inlet flow channel 102.

[0061] Through the above arrangement, the one-way valve 2 is arranged in the mounting cavity 101, and the two ends of the annular structure 21 abut against the mounting cavity 101, so that the liquid inlet flow channel 102 and the liquid outlet flow channel 103 are connected with and communicated with the accommodating cavity 211, thereby effectively solving the problem of leakage of the connection part of the one-way valve 2 and the connecting pipeline.

[0062] Preferably, the annular structure 21 is preferably made of plastic material, and a large number of products can be produced by using the injection molding process, thereby effectively reducing the manufacturing cost. At the same time, the annular structure 21 made of plastic material is light and corrosion-resistant, thereby further improving the overall performance and reliability of the one-way valve 2 and meeting the demand for wide application.

[0063] Further, the annular structure 21 is specifically composed of a first annular member 212 and a second annular member 213 arranged in sequence in the first direction (i.e. the A1 direction). This segmented design not only facilitates processing and assembly, but also enhances the overall flexibility of the annular structure 21. The first annular member 212 and the second annular member 213 are tightly connected through a reliable buckle structure 214, thereby ensuring the stability and durability of the two members during long-term use.

[0064] In particular, the first ring-shaped member 212 is ingeniously arranged close to the liquid inlet flow channel 102, while the second ring-shaped member 213 is correspondingly arranged close to the liquid outlet flow channel 103. Such an arrangement enables the fluid to flow smoothly from the liquid inlet flow channel 102 into the accommodating cavity 211, and then out through the liquid outlet flow channel 103, achieving effective control and regulation of the fluid.

[0065] In addition, the abutting protrusion 2121 is carefully designed on the inner side of the side wall of the first ring-shaped member 212 and uniformly distributed along its circumference. This design not only enhances the structural strength of the first ring-shaped member 212, but also provides a stable abutting point for the valve core 22, thereby ensuring the sealing performance and stability of the one-way valve 2 in the closed state.

[0066] Further, the buckle structure 214 serves as a key component connecting the first ring-shaped member 212 and the second ring-shaped member 213, and is designed to be ingenious and practical.

[0067] Specifically, the buckle structure 214 is composed of a clasp 2141 and a buckle 2142 that cooperate with each other. The clasp 2141 can be flexibly arranged on the first ring-shaped member 212 or the second ring-shaped member 213, while the buckle 2142 is correspondingly arranged on the other ring-shaped member, i.e., the second ring-shaped member 213 or the first ring-shaped member 212. Through a simple buckling action, the clasp 2141 and the buckle 2142 can achieve a tight and secure connection, which not only facilitates installation, but also effectively ensures the integrity and stability of the ring-shaped structure 21, providing strong support for the long-term reliable operation of the one-way valve 2.

[0068] In the present embodiment, as shown in Figure 4 the clasp 2141 is arranged on the second ring-shaped member 213, while the buckle 2142 is arranged on the first ring-shaped member 212.

[0069] The design of the one-way valve 2 also ingeniously incorporates the key element of the elastic member 23. The elastic member 23 is carefully placed inside the accommodating cavity 211, and its main function is to provide stable elastic support for the valve core 22. Through the elastic force of the elastic member 23, the valve core 22 can be reliably abutted on the abutting protrusion 2121, thereby ensuring a tight sealing connection between the two. This design not only improves the sealing performance of the one-way valve 2, but also effectively prevents leakage of the fluid between the valve core 22 and the abutting protrusion 2121, further enhancing the reliability and durability of the one-way valve 2.

[0070] Specifically, when the pressure of the liquid entering the containing cavity 211 from the liquid inlet channel 102 on the valve core 22 is less than or equal to the pressure of the elastic member 23 on the valve core 22, the valve core 22 is abutted on the abutment protrusion 2121, at this time, the one-way valve 2 is in a closed state; when the pressure of the liquid entering the containing cavity 211 from the liquid inlet channel 102 on the one-way valve is greater than the pressure of the elastic member 23 on the valve core 22, the valve core 22 will move towards the liquid outlet channel 103, so as to open the one-way valve 2.

[0071] Further, the main body of the second annular member 213 is composed of an annular wall 2131, which provides a solid structural basis for the entire second annular member 213. On the inner side of the annular wall 2131, a mounting structure 2132 is specially provided, which is designed in full consideration of the mounting and positioning requirements of the valve core 22.

[0072] The mounting structure 2132 specifically includes a connecting portion 21321 closely connected with the annular wall 2131, and a fixing portion 21322 provided on the side of the connecting portion towards the liquid inlet channel 102. The fixing portion 21322 skillfully extends towards the liquid inlet channel 102, providing a stable support platform for the valve core 22. At the same time, a flow channel is provided through the connecting portion 21321 in the first direction A1, ensuring smooth passage of fluid.

[0073] It is worth mentioning that the valve core 22 is accurately sleeved on the fixing portion 21322, and in the first direction, the elastic member 23 is skillfully connected between the valve core 22 and the fixing portion 21322. Such a design not only ensures the stable movement of the valve core 22 under the action of the elastic member 23, but also enables the valve core 22 to be closely abutted on the abutment protrusion 2121 through the elastic force of the elastic member 23, thereby realizing efficient sealing and reliable control of the one-way valve 2.

[0074] The valve core 22 is designed skillfully and practically, and a first recess 22111 is specially provided on the first end 2211 thereof towards the fixing portion 21322. This recess not only provides space for the connection between the valve core 22 and the fixing portion 21322, but also provides a stable mounting basis for the elastic member 23.

[0075] Specifically, the groove side wall of the first recess 22111 is closely sleeved on the fixing portion 21322 and can smoothly slide thereon. One end of the elastic member 23 is closely connected with the groove bottom wall of the first recess 22111, and the other end is connected with the fixing portion 21322. Such a design not only ensures the flexible movement of the valve core 22 under the action of the elastic member 23, but also ensures the compactness and stability of the entire one-way valve 2 structure, providing a strong guarantee for the efficient operation of the one-way valve.

[0076] The design of the fixed part 21322 further embodies the ingenuity and meticulousness of the utility model. At one end thereof facing the groove bottom wall of the first groove 22111, a second groove 213221 is specially provided. This groove not only provides a stable connecting point for the other end of the elastic member 23, but also ensures the stability and reliability of the elastic member during the operation of the one-way valve 2 through the close connection of the groove bottom wall thereof with the elastic member 23. Such a design not only enhances the structural integrity of the one-way valve 2, but also improves the overall durability and performance thereof, fully demonstrating the innovation and optimization of the utility model in the design of mechanical structures.

[0077] The valve core 22, as the core component of the one-way valve 2, has a structure design fully considering the sealing and stability. The valve core 22 mainly comprises a valve core body 221 extending in the first direction and a second sealing member 222 sleeved on the side wall of the valve core body. One end of the valve core body 221, i.e. the end facing the fixed part 21322, forms the first end of the valve core 22, and the connection and sliding design between this end and the fixed part 21322 ensure the flexible movement of the valve core 22 under the action of the elastic member 23.

[0078] The arrangement of the second sealing member 222 greatly enhances the sealing performance between the valve core 22 and the abutting protrusion 2121. When the valve core 22 abuts against the abutting protrusion 2121 and forms a sealed connection, the valve core body 221 directly contacts the abutting protrusion 2121, and at the same time, the second sealing member 222 is also closely fitted between the valve core body 221 and the abutting protrusion 2121, forming a double-sealed structure. Such a design not only effectively prevents fluid leakage, but also greatly improves the overall sealing effect and reliability of the one-way valve 2.

[0079] Further, a clamping groove 2212 is ingeniously arranged on the side wall of the valve core body 221. This groove extends along the circumference of the valve core body 221, forming a complete annular structure. The second sealing member 222 is stably sleeved on the valve core body 221 through this clamping groove 2212. Such a design not only simplifies the installation process of the second sealing member 222, but also ensures the firmness and stability thereof on the valve core body 221, providing a strong guarantee for the reliable operation of the one-way valve 2.

[0080] In summary, the embodiments of the utility model realize the following technical effects:

[0081] The one-way valve 2 is arranged in the mounting cavity 101, and the abutment of the two ends of the annular structure 21 with the mounting cavity 101 can realize the butt joint and communication of the liquid inlet flow channel 102 and the liquid outlet flow channel 103 with the containing cavity 211, thereby effectively solving the problem of leakage of the connection part of the one-way valve 2 and the connecting pipeline.

[0082] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0083] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0084] It should be noted that the terms "first", "second", and the like, used in the specification and the claims of the application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0085] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A one-way valve installed in a component, wherein the component is provided with a mounting cavity and a liquid inlet flow channel and a liquid outlet flow channel located on both sides of the mounting cavity in a first direction, wherein the liquid inlet flow channel and the liquid outlet flow channel are both connected to the mounting cavity, characterized in that: The one-way valve is arranged in the installation cavity and includes an annular structure and a valve core. The annular structure extends along a first direction and encloses an accommodating cavity. The two ends of the annular structure in the first direction are respectively abutted against the cavity wall of the installation cavity, so that the liquid inlet channel and the liquid outlet channel are respectively connected to the accommodating cavity. An abutting protrusion is provided on the inner side of the side wall of the annular structure near the liquid inlet channel along its circumference. A first sealing member is sleeved on the outer side of the side wall of the annular structure. The valve core is arranged in the accommodating cavity and can move along the first direction toward the liquid outlet channel or the liquid inlet channel, so that the valve core and the abutting protrusion are separated or abutted and sealed.

2. The one-way valve installed in a component according to claim 1, characterized in that: The annular structure is a plastic structure.

3. The one-way valve installed in a component according to claim 2, characterized in that: The annular structure includes a first annular member and a second annular member arranged in sequence along a first direction, the first annular member and the second annular member are connected by a snap-fit ​​structure, the first annular member is arranged close to the liquid inlet channel, the second annular member is arranged close to the liquid outlet channel, and the abutment protrusion is arranged on the inner side of the side wall of the first annular member along the circumference of the first annular member.

4. The one-way valve installed in a component according to claim 3, characterized in that: The buckle structure includes a buckle and a hook that cooperate with each other. The buckle is arranged on the first annular member or the second annular member, and the hook is arranged on the second annular member or the first annular member.

5. The one-way valve installed in a component according to claim 3, characterized in that: The one-way valve further comprises an elastic member, which is disposed in the accommodating cavity and is at least used to abut the valve core against the abutting protrusion to achieve a sealing connection between the two.

6. The one-way valve installed in a component according to claim 5, characterized in that: The second annular member includes an annular wall and a mounting structure arranged on the inner side of the annular wall, the mounting structure includes a connecting portion connected to the annular wall and a fixing portion arranged on the side of the connecting portion facing the liquid inlet channel, the fixing portion extends toward the liquid inlet channel, a flow channel is provided on the connecting portion along a first direction, the valve core is sleeved on the fixing portion, and in the first direction, the elastic member is connected between the valve core and the fixing portion.

7. The one-way valve installed in a component according to claim 6, characterized in that: The valve core has a first end facing the fixed part, and a first groove is provided on the first end. The side wall of the first groove is sleeved on the fixed part and can slide relative to the fixed part. One end of the elastic member is connected to the bottom wall of the first groove, and the other end is connected to the fixed part.

8. The one-way valve installed in a component according to claim 7, characterized in that: A second groove is provided on one end of the fixing portion facing the groove bottom wall of the first groove, and the other end of the elastic member is connected to the groove bottom wall of the second groove.

9. The one-way valve installed in a component according to claim 8, characterized in that: The valve core includes a valve core body and a second sealing member extending along a first direction, and one end of the valve core body facing the fixed portion forms the first end of the valve core, and the second sealing member is sleeved on the side wall of the valve core body. When the valve core abuts and seals the abutting protrusion, the valve core body abuts the abutting protrusion and the second sealing member abuts the valve core body and the abutting protrusion respectively to seal the two.

10. The one-way valve installed in a component according to claim 9, characterized in that: A clamping groove is provided on the side wall of the valve core body. The clamping groove forms an annular structure along the circumference of the valve core body. The second sealing member is sleeved in the clamping groove.

Images