Sealing element with one-way sealing function and valve

Abstract

The utility model discloses a sealing piece and a valve with a one-way sealing function, the sealing piece comprises a support piece and an elastic piece, the support piece is provided with an outer convex part and a first through hole, the elastic piece is provided with a second through hole and an elastic fitting area extending along the radial direction of the second through hole, and the elastic fitting area is provided with a first through hole and a second through hole. The elastic attaching area is attached to the outer protruding part and is pushed by the outer protruding part to elastically deform, the elastic attaching area covers the first through hole, the outer protruding part blocks the second through hole, when fluid flows forwards, the pressure of the fluid acts on the lower end of the elastic attaching area, a gap is formed between the elastic attaching area and the outer protruding part, a fluid channel is formed, and when the fluid flows backwards, the fluid channel is blocked by the elastic attaching area. The pressure of fluid acts on the upper end of the elastic attaching area, so that the elastic attaching area is tightly attached to the outer convex part, a fluid channel is not formed, the non-return function is achieved, the structure is simple, the manufacturing cost is low, the elastic attaching area is elastically attached to the outer convex part, a gap is not prone to being formed, the requirement for low-pressure one-way sealing is met, and good high-pressure one-way sealing performance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing elements, in particular to a sealing element and a valve with a one-way sealing function. Background Art

[0002] A seal is a product used in liquid or gas delivery systems to prevent leakage in pipes or other components. In the bathroom industry, there are countless products that use seals. For example, floor drains, dewatering devices, flush valves, faucets, angle valves and other water-related products all use seals to prevent leakage to a greater or lesser extent. In certain usage scenarios, it is also very important to find a seal that can effectively achieve one-way sealing and is cost-effective for the above bathroom products.

[0003] Some problems that exist in existing sealing components with one-way sealing function:

[0004] 1. The cylindrical spring-loaded one-way valve is used as a one-way seal, which increases manufacturing costs and has unstable performance;

[0005] 2. Use rubber flat gasket to achieve one-way sealing, which affects product flow and cannot be applied to all products;

[0006] 3. Use a duckbill valve to achieve one-way sealing, which will lose its sealing effect when facing high-pressure reverse flow. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a sealing member with a one-way sealing function, which has the advantages of simple structure and stable and reliable one-way sealing function.

[0008] The utility model also provides a valve tool.

[0009] According to the first aspect of the present invention, a sealing member with a one-way sealing function comprises a support member and an elastic member arranged on the support member, the support member is provided with an outer protrusion and at least one first through hole, the elastic member is provided with a second through hole and an elastic fitting area extending in the radial direction of the second through hole, the elastic fitting area is fitted to the outer protrusion and is elastically deformed by the outer protrusion, the elastic fitting area covers the first through hole, and the outer protrusion blocks the second through hole, when the fluid flows from the first through hole to the elastic fitting area, the pressure of the fluid acts on the elastic fitting area, causing the elastic fitting area to deform away from the outer protrusion, thereby forming a gap extending to the second through hole between the elastic fitting area and the outer protrusion, thereby forming a fluid channel flowing from the first through hole to the second through hole, when the fluid flows in from the direction of the second through hole, the pressure of the fluid acts on the outside of the elastic fitting area, causing the elastic fitting area to be more closely attached to the outer protrusion, and no fluid channel is formed between the elastic fitting area and the outer protrusion, thereby blocking the fluid from flowing from the second through hole to the first through hole, thereby achieving a non-return function.

[0010] The seal with a one-way sealing function according to the embodiment of the utility model has at least the following beneficial effects: the seal with a one-way sealing function can be formed by combining a support member and an elastic member, the structure is simple, the manufacturing cost is low, and the elastic fitting area is elastically deformed by being pushed by the outer convex part, so that the elastic fitting area elastically fits the outer convex part, and it is not easy to form a gap, thereby meeting the requirement of low-pressure one-way sealing, and the elastic fitting area is supported by the support member and the outer convex part, and the elastic fitting area is not easily deformed and invalidated by reverse high-pressure extrusion, so it has better high-pressure one-way sealing performance.

[0011] According to some embodiments of the present invention, the elastic member covers the outer side of the supporting member.

[0012] According to some embodiments of the utility model, the elastic member is provided with a covering cavity, the elastic fitting area and the second through hole are arranged at the upper part of the covering cavity, and the lower part of the covering cavity is provided with a mounting hole, and the support member can be installed into the covering cavity through the mounting hole.

[0013] According to some embodiments of the present invention, a limiting portion cooperating with an outer edge of the mounting hole is provided at the lower portion of the support member.

[0014] According to some embodiments of the present invention, the elastic member and the supporting member are interference fit.

[0015] According to some embodiments of the present invention, an auxiliary positioning portion is protruding from the outer side of the elastic member along its radial direction.

[0016] According to some embodiments of the present invention, the auxiliary positioning portions are configured in plurality and are distributed at intervals along the circumference of the elastic member.

[0017] According to some embodiments of the present utility model, the first through holes are configured to be multiple and are distributed at intervals around the convex portion.

[0018] According to some embodiments of the present utility model, the support member includes an outer support portion, the convex portion is located inside the outer support portion, an annular gap is formed between the convex portion and the outer support portion, and a plurality of connecting ribs connecting the convex portion and the outer support portion are arranged at intervals at the annular gap, and the first through holes are formed between adjacent connecting ribs.

[0019] According to some embodiments of the present utility model, the support member is provided with a reinforcing portion connecting the connecting rib and the outer support portion.

[0020] According to some embodiments of the present utility model, the convex portion is provided with a ring convex portion, the elastic fitting area is fitted to the ring convex portion, and the second through hole is located inside the ring convex portion.

[0021] According to some embodiments of the present utility model, the contact surface between the convex portion and the elastic fitting area is a curved surface structure.

[0022] According to an embodiment of the second aspect of the present utility model, a valve tool includes the seal member as described in any of the above embodiments.

[0023] The valve tool according to the embodiment of the present utility model has at least the following beneficial effects: convenient assembly and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0025] Figure 1 is a schematic structural diagram of the seal member according to the embodiment of the present utility model;

[0026] Figure 2 is a first exploded view (top view) of the seal member according to the embodiment of the present utility model;

[0027] Figure 3 is a second exploded view (bottom view) of the seal member according to the embodiment of the present utility model;

[0028] Figure 4 is a cross-sectional schematic diagram of the seal member according to the embodiment of the present utility model;

[0029] Figure 5 is a schematic structural diagram of the valve tool according to the embodiment of the present utility model;

[0030] Figure 6 is an exploded view of the valve tool according to the embodiment of the present utility model;

[0031] Figure 7This is a schematic cross-sectional view of the valve tool according to an embodiment of the present utility model.

[0032] Reference numerals in the drawings:

[0033] Support member 100, first through hole 101, convex portion 110, annular convex portion 111, limiting portion 120, outer support portion 130, auxiliary support portion 131, connecting rib 140, strengthening portion 150;

[0034] Elastic member 200, second through hole 201, covering cavity 202, mounting hole 203, elastic fitting area 210, auxiliary positioning portion 220;

[0035] Interface assembly 910, valve body 920. Detailed implementation manners

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0037] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, if the first and second are described only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0039] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0040] In the related art, check valves generally adopt cylindrical spring type, flat gasket type or duckbill type structures. The cylindrical spring type check valve has a complex structure, relatively high manufacturing cost, and occupies a large space, making it inconvenient to install into the valve body. The flat gasket type check valve, although having a simple structure, is affected by the fitting accuracy, and there is a situation of reverse flow through the check valve at low pressure, and the check effect is not good. The duckbill type structure check valve, although it can meet the requirements of low-pressure sealing, once high pressure occurs, the duckbill position is extremely prone to deformation, and the check and sealing functions fail.

[0041] Reference below Figures 1 to 7 A sealing member and a valve with a one-way sealing function according to an embodiment of the utility model are described.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a seal with a one-way sealing function according to a specific embodiment of the first aspect of the utility model includes a support member 100 and an elastic member 200 arranged on the support member 100, the support member 100 is provided with an outer protrusion 110 and at least one first through hole 101, the elastic member 200 is provided with a second through hole 201 and an elastic fitting area 210 extending along the radial direction of the second through hole 201, the elastic fitting area 210 is fitted to the outer protrusion 110 and is pushed by the outer protrusion 110 to be elastically deformed, the elastic fitting area 210 covers the first through hole 101, and the outer protrusion 110 blocks the second through hole 201.

[0043] When using, Figure 4 As shown, when the fluid flows from the first through hole 101 to the elastic fitting area 210 (the fluid flows in a positive direction from bottom to top), the pressure of the fluid acts on the elastic fitting area 210, causing the elastic fitting area 210 to deform away from the outer protrusion 110, thereby forming a gap between the elastic fitting area 210 and the outer protrusion 110 extending to the second through hole 201, thereby forming a fluid channel flowing from the first through hole 101 to the second through hole 201, and when the fluid flows into the second through hole 201 (the fluid flows in a reverse direction from top to bottom), the pressure of the fluid acts on the outside of the elastic fitting area 210, making the elastic fitting area 210 more closely attached to the outer protrusion 110, and no fluid channel is formed between the elastic fitting area 210 and the outer protrusion 110, thereby blocking the fluid from flowing from the second through hole 201 to the first through hole 101, thereby achieving a non-return function.

[0044] The utility model can form a seal with a one-way sealing function by combining a support member 100 and an elastic member 200. The structure is simple and the manufacturing cost is low. The elastic fitting area 210 is pushed and elastically deformed by the outer protrusion 110, so that the elastic fitting area 210 elastically fits the outer protrusion 110, and it is not easy to form a gap, which meets the requirements of low-pressure one-way sealing. The elastic fitting area 210 is supported by the support member 100 and the outer protrusion 110, and the elastic fitting area 210 is not easily deformed and invalidated by reverse high-pressure extrusion, so it has better high-pressure one-way sealing performance.

[0045] In some embodiments of the present invention, the support member 100 is made of a hard material, such as hard plastic, aluminum alloy, stainless steel and other materials, to form a better supporting effect for the elastic fitting area 210, and the elastic member 200 is made of an elastic material, such as rubber, silicone and other materials, to meet the function of elastic fitting.

[0046] It can be understood that in some embodiments of the present utility model, the elastic member 200 can be a combined structure. For example, the outer ring is made of hard plastic, and the inner ring (elastic fitting area 210) is made of elastic plastic. The outer ring and the inner ring can be formed by one-shot double-headed injection molding or assembled after secondary injection molding.

[0047] In some embodiments of the present utility model, when the elastic member 200 is not installed on the support member 100, the elastic fitting area 210 is a planar structure. When the elastic member 200 is installed on the support member 100, the elastic fitting area 210 is elastically deformed by the pushing of the convex portion 110, so as to elastically adhere to the convex portion 110.

[0048] In some embodiments of the present utility model, the elastic member 200 covers the outside of the support member 100, so that the elastic member 200 is stably installed on the outside of the support member 100, and the sealing function at the edge position of the support member 100 can be satisfied.

[0049] It can be understood that in some embodiments of the present utility model, the elastic member 200 can also be installed on the support member 100 in other ways. For example, the outer edge of the elastic member 200 is pressed against the outer edge of the support member 100 by a pressing member. Specifically, the pressing member is a circular metal gasket, which is connected to the outer edge of the support member 100 by means of riveting, screw connection, etc. At the same time, the outer edge of the elastic member 200 is clamped between the circular metal gasket and the outer edge of the support member 100, which can meet the installation requirements of the elastic member 200 and the support member 100, and does not affect the elastic fitting effect of the elastic fitting area 210.

[0050] Such as Figure 3 、 Figure 4 As shown, in some embodiments of the present utility model, the elastic member 200 is provided with a covering cavity 202. The elastic fitting area 210 and the second through hole 201 are arranged at the upper part of the covering cavity 202. An installation hole 203 is arranged at the lower part of the covering cavity 202. The support member 100 can be inserted into the covering cavity 202 through the installation hole 203, so as to complete the assembly of the elastic member 200 and the support member 100.

[0051] Specifically, the elastic member 200 is made of an elastic material, so that the installation hole 203 at the lower part of the covering cavity 202 can be elastically deformed, so that a relatively large support member 100 can be inserted into the covering cavity 202 through the installation hole 203. At the same time, the installation hole 203 also avoids the first through hole 101 on the support member 100, so that the fluid can flow unidirectionally normally.

[0052] Of course, in the specific implementation process, the support member 100 can also be inserted from the second through hole 201, which will not be elaborated here.

[0053] Such as Figure 3 、 Figure 4As shown, in some embodiments of the present utility model, a limiting portion 120 that cooperates with the outer edge of the mounting hole 203 is provided at the lower part of the support member 100 to position the relative positions of the elastic member 200 and the support member 100, thereby improving the fitting accuracy between the elastic member 200 and the support member 100.

[0054] In some embodiments of the present utility model, the elastic member 200 and the support member 100 are in interference fit, such that the elastic member 200 can elastically wrap the outer side of the support member 100. The elastic member 200 and the support member 100 are tightly fitted, and it is not easy to form a gap between the elastic member 200 and the support member 100, thus improving the sealing effect.

[0055] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, in some embodiments of the present utility model, the support member 100 and the elastic member 200 are integrally in a flat structure. After combination, a relatively thin gasket structure can be formed, which occupies a small space during installation and is convenient for installation.

[0056] Specifically, as Figure 5 、 Figure 6 、 Figure 7 As shown, the seal formed by the combination of the support member 100 and the elastic member 200 can be installed at the interface assembly 910 of the valve tool. The seal is arranged between the interface assembly 910 and the valve body 920. When the interface assembly 910 is tightened, the edge of the seal can be pressed tightly between the interface assembly 910 and the valve body 920, realizing the sealing of the connection position between the interface assembly 910 and the valve body 920. At the same time, by utilizing the check valve function of the seal, the one-way flow of the fluid is realized (the fluid can only enter the valve body 920 from the interface assembly 910 and cannot flow out of the valve body 920 in the reverse direction through the interface assembly 910).

[0057] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, in some embodiments of the present utility model, an auxiliary positioning portion 220 is convexly provided on the outer side of the elastic member 200 along its radial direction. The auxiliary positioning portion 220 can position the seal to the installation position during the installation and use of the seal, facilitating the installation and use of the seal.

[0058] Specifically, as Figure 7 As shown, when the seal is applied to the valve tool, the auxiliary positioning portion 220 of the seal can be snapped into the thread groove of the interface assembly 910, preventing the seal from loosening or shifting during the installation process, and ensuring the installation accuracy and sealing effect of the seal.

[0059] As Figure 1 、 Figure 2As shown, in some embodiments of the present utility model, the auxiliary positioning portions 220 are configured to be multiple and are spaced circumferentially along the elastic member 200 to improve the positioning effect.

[0060] Specifically, the auxiliary positioning portions 220 are arc-shaped fin structures and are provided in multiple numbers. The multiple auxiliary positioning portions 220 are spaced along the outer edge of the elastic member 200. The multiple auxiliary positioning portions 220 can respectively be snapped into the threaded grooves of the interface assembly 910 to improve the positioning effect.

[0061] In some embodiments of the present utility model, the multiple auxiliary positioning portions 220 are not located on the same horizontal plane, that is, the multiple auxiliary positioning portions 220 are staggered in the height direction to form a better fit with the threaded grooves of the helically rising interface assembly 910.

[0062] In some embodiments of the present utility model, the multiple auxiliary positioning portions 220 are spaced along the helically rising line of the outer edge of the elastic member 200 to form a better fit with the threaded grooves of the interface assembly 910.

[0063] In some embodiments of the present utility model, the auxiliary positioning portion 220 has a helically rising structure to form a better fit with the threaded grooves of the interface assembly 910.

[0064] In some embodiments of the present utility model, the first through holes 101 are configured to be multiple and are spaced around the outer convex portion 110 to divide the fluid flow, so that the pressure of the fluid can act more evenly on the elastic fitting area 210 to achieve a better conduction effect.

[0065] It can be understood that, in some embodiments of the present utility model, the first through hole 101 can also be set to one to meet the conduction of the fluid.

[0066] Such as Figure 2 、 Figure 3 As shown, in some embodiments of the present utility model, the support member 100 further includes an outer support portion 130. The outer convex portion 110 is located inside the outer support portion 130. An annular gap is formed between the outer convex portion 110 and the outer support portion 130. A plurality of connecting ribs 140 connecting the outer convex portion 110 and the outer support portion 130 are spaced in the annular gap. First through holes 101 are formed between adjacent connecting ribs 140, so that the outer convex portion 110 forms a better support effect on the elastic fitting area 210. At the same time, a plurality of evenly distributed first through holes 101 can also be formed.

[0067] Such as Figure 3 As shown, in some embodiments of the present utility model, the support member 100 is provided with a reinforcing portion 150 connecting the connecting rib 140 and the outer support portion 130 to improve the structural strength of the connecting rib 140 and improve the support effect of the connecting rib 140 on the outer convex portion 110.

[0068] As Figure 2 , Figure 3 shown, in some embodiments of the present utility model, an auxiliary support portion 131 extends towards the first through hole 101 on the outer support portion 130. The auxiliary support portion 131 can assist in supporting the elastic fitting area 210 covering the first through hole 101, improve the anti-deformation ability of the elastic fitting area 210 under high-pressure reverse flow, and avoid the occurrence of abnormal deformation or rupture of the elastic fitting area 210.

[0069] As Figure 2 , Figure 4 shown, in some embodiments of the present utility model, the contact surface between the outer convex portion 110 and the elastic fitting area 210 is a curved surface structure, which reduces the obstruction of the seal to the oncoming flow in the forward direction, enables the elastic fitting area 210 to be fully pressed, the opening angle of the elastic member 200 is not limited, ensures sufficient water flow, and can improve the fitting effect and sealing performance.

[0070] Specifically, the contact surface between the outer convex portion 110 and the elastic fitting area 210 is an arc surface structure, that is, the outer convex portion 110 is generally spherical in shape, so as to reduce the influence on the flow rate, and the fitting effect between the outer convex portion 110 and the elastic fitting area 210 is better.

[0071] Of course, in the specific implementation process, the contact surface between the outer convex portion 110 and the elastic fitting area 210 can also be other curved surfaces such as a paraboloid, a water droplet-shaped curved surface, etc., which will not be elaborated here.

[0072] As Figure 2 shown, in some embodiments of the present utility model, the upper end surface of the connecting rib 140 is a curved surface structure corresponding to the elastic fitting area 210, so as to improve the fitting effect, not easily form a gap, and improve the sealing performance.

[0073] As Figure 2 shown, in some embodiments of the present utility model, the upper end surface of the auxiliary support portion 131 is a curved surface structure corresponding to the elastic fitting area 210, so as to improve the fitting effect, not easily form a gap, and improve the sealing performance.

[0074] As Figure 2 , Figure 4 shown, in some embodiments of the present utility model, the outer convex portion 110 is provided with an annular convex portion 111, the elastic fitting area 210 is fitted to the annular convex portion 111, and the second through hole 201 is located inside the annular convex portion 111. Since the elastic member 200 has a certain elasticity, the elastic fitting area 210 can form a tight fit with the annular convex portion 111 and has a large elastic fitting force, further improving the anti-backflow sealing effect of the seal under low pressure.

[0075] Specifically, the annular convex portion 111 is of a circular structure and protrudes upward from the upper end face of the outer convex portion 110. When the elastic member 200 is installed on the support member 100, the second through hole 201 is located inside the annular convex portion 111. Thus, when the fluid flowing in the reverse direction enters through the second through hole 201, it is blocked by the matching structure of the annular convex portion 111 and the elastic fitting area 210, thereby improving the reverse flow prevention and sealing effect of the seal at low pressure.

[0076] It can be understood that in some embodiments of the present invention, the annular convex portion 111 can also be set to an elliptical shape, a hexagonal shape, etc.

[0077] The valve tool according to the second aspect embodiment of the present invention includes the seal of any of the above embodiments.

[0078] Specifically, as Figures 5 to 7 shown, the valve tool includes a valve body 920 and an interface assembly 910. The seal is arranged between the interface assembly 910 and the valve body 920. When the interface assembly 910 is screwed tightly, the edge of the seal can be pressed tightly between the interface assembly 910 and the valve body 920, realizing the sealing of the connection position between the interface assembly 910 and the valve body 920. At the same time, by using the reverse flow prevention function of the seal, the one-way flow of the fluid is realized (the fluid can only enter the valve body 920 from the interface assembly 910 and cannot flow out of the valve body 920 in the reverse direction through the interface assembly 910), which has the advantages of convenient assembly and low cost.

[0079] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0080] Certainly, the present invention is not limited to the above embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A seal with one-way sealing function, characterized in that: include: A support member, wherein the support member is provided with an outer protrusion and at least one first through hole; An elastic member is arranged on the supporting member, and the elastic member is provided with a second through hole and an elastic fitting area extending in the radial direction of the second through hole. The elastic fitting area fits the outer protrusion and is pushed by the outer protrusion to be elastically deformed. The elastic fitting area covers the first through hole, and the outer protrusion blocks the second through hole.

2. The sealing member with one-way sealing function according to claim 1, characterized in that: The elastic member covers the outer side of the supporting member.

3. The sealing member with one-way sealing function according to claim 2, characterized in that: The elastic member is interference fit with the supporting member.

4. The sealing member with one-way sealing function according to claim 1, characterized in that: An auxiliary positioning portion is protruding from the outer side of the elastic member along the radial direction thereof.

5. The sealing member with one-way sealing function according to claim 4, characterized in that: The auxiliary positioning portions are configured in plurality and are distributed at intervals along the circumference of the elastic member.

6. The sealing member with one-way sealing function according to claim 1, characterized in that: The first through holes are configured in plurality and are distributed around the outer protrusion at intervals.

7. The sealing member with one-way sealing function according to claim 1 or 6, characterized in that: The support member includes an outer supporting portion, the outer convex portion is located on the inner side of the outer supporting portion, an annular gap is formed between the outer convex portion and the outer supporting portion, a plurality of connecting ribs connecting the outer convex portion and the outer supporting portion are arranged at intervals in the annular gap, and the first through hole is formed between adjacent connecting ribs.

8. The sealing member with one-way sealing function according to claim 1, characterized in that: The outer convex portion is provided with an annular convex portion, the elastic fitting area is fitted to the annular convex portion, and the second through hole is located on the inner side of the annular convex portion.

9. The sealing member with one-way sealing function according to claim 1, characterized in that: The contact surface between the outer protrusion and the elastic fitting area is a curved surface structure.

10. A valve, characterized in that: include: A seal as claimed in any one of claims 1 to 9.

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