A seal and control valve

Abstract

The utility model provides a kind of sealing gasket, comprising: sealing rib, upper protruding part, support part, sealing branch, the sealing gasket is by multiple sealing rib distribution connection integrated molding, the upper protruding part is located sealing rib top, for with valve core bottom resistance, the support part is symmetrically set in sealing rib both sides, the sealing branch is located support part below and symmetrically set in sealing rib both sides.The utility model is formed by the sealing gasket of the sealing rib of "Fu" type section, strengthens the radial sealing property when sealing, when being applied in control valve, the problem that the medium flow direction adjacent flow passage can be avoided to cause internal leakage;While solving the internal leakage of control valve by using the above sealing gasket, the force required by the external application to make the sealing gasket and valve core end face closely combined is smaller, avoid the friction force required to overcome when valve core rotates increases, cause the torque required for valve core rotation is larger, thereby greatly reduce the requirement to actuator output torque.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a gasket and a control valve. Background Art

[0002] The thermal management system of new energy vehicles is developing towards the direction of integration. Multiple fluid control devices are usually used in multiple subsystems of the thermal management system of new energy vehicles. The multi-channel fluid control device often has the problem of internal leakage, which in turn leads to the failure of the flow channel switching function mode.

[0003] In order to solve the problem of internal leakage, the traditional method is to apply pressure to the valve core to make the valve core of the water valve fit tightly with the inner gasket. Such a practice alleviates the problem of internal leakage to a certain extent, but also results in a greater torque required for the valve core to rotate. Higher requirements are put forward for the output torque of the actuator, and ultimately higher requirements are put forward for the performance of the motor and the reduction ratio of the traditional system.

[0004] The traditional method ignores the sealing problem between the gasket and the sealing groove of the valve housing. That is, even if the valve core fits tightly with the gasket, the medium in the water valve may still enter other flow channels through the gap between the gasket and the sealing groove of the valve housing, causing the problem of internal leakage. Without solving the radial sealing problem between the gasket and the sealing groove of the valve housing through structural methods, only by applying pressure to the valve core can the gasket also fit tightly with the sealing groove, but this solution also increases the requirements for the output torque of the actuator. Therefore, it is necessary to provide a gasket and a control valve with structural changes to overcome the defects existing above. Content of the Utility Model

[0005] The purpose of the utility model is to provide a gasket and a control valve.

[0006] According to one aspect of the utility model, a gasket is provided, including: Sealing ribs, the gasket is integrally formed by connecting multiple sealing ribs distributed; Upper convex part, the upper convex part is located at the top of the sealing rib and is used to抵触 with the bottom of the valve core; Support part, the support part is symmetrically arranged on both sides of the sealing rib; Sealing branch part, the sealing branch part is located below the support part and is symmetrically arranged on both sides of the sealing rib.

[0007] Preferably, the cross-section of the sealing rib is in the shape of "Fu", the sealing branch part includes a first branch part and a second branch part, the first branch part is located between the support part and the second branch part, the first branch part is symmetrically arranged on both sides of the sealing rib, and the second branch part is symmetrically arranged on both sides of the sealing rib.

[0008] Preferably, the support portion is in the form of a raised strip protruding from the sealing rib to both sides, and the cross-section of the support portion is rectangular.

[0009] Preferably, the first branch protrudes from the sealing rib to both sides, and the cross-section of the first branch is hill-shaped, converging outward from the sealing rib.

[0010] Preferably, the second branch extends downward from the sealing rib and expands to both sides, and a first groove is provided between the second branches on both sides, the cross-section of the first groove being arc-shaped or V-shaped.

[0011] Preferably, a second groove is provided between the support portion and the first branch on the same side, and the cross section of the second groove includes a vertical section extending vertically downward from the support portion and a curved section transitioning from the vertical section to the first branch.

[0012] Preferably, a third groove is provided between the first branch and the second branch on the same side, and the cross-section of the third groove is arc-shaped.

[0013] Preferably, the first branch protrudes from the sealing rib to both sides, the second branch extends downward from the sealing rib, and a first groove is provided between the second branches on both sides, the cross-section of the first groove being arc-shaped.

[0014] Preferably, it also includes an inner ring segment, an outer ring segment, and a plurality of connecting segments located between the inner ring segment and the outer ring segment. The inner ring segment, the outer ring segment, and the connecting segments are all composed of sealing ribs, and the connecting segments extend from the inner ring segment to the outer ring segment.

[0015] Preferably, the bottom of the sealing rib is provided with an inwardly recessed limiting groove, which is located at the connection between the inner ring segment and the outer ring segment and the connecting segment.

[0016] According to another aspect of the present invention, a control valve is provided, including a housing, a valve core and the aforementioned sealing gasket, wherein the housing is provided with an installation groove, the sealing gasket is disposed in the installation groove, and the valve core is disposed in the housing and pressed on top of the sealing gasket.

[0017] Preferably, the top of the mounting groove is wider than the bottom, and the mounting groove includes a sealing section, a transition section and a support section from bottom to top. The width of the support section is greater than the width of the sealing section. The transition section extends from the sealing section to the support section in an expanding manner. When the sealing gasket is installed in the mounting groove, the support part is located in the support section and has a clearance fit with the mounting groove at the support section. The first support and the second support are located in the sealing section and have an interference fit with the mounting groove at the sealing section.

[0018] According to another aspect of the present invention, a control valve is provided, including a housing and the aforementioned sealing gasket, wherein the housing is provided with a mounting groove for mounting the sealing gasket, and the bottom of the mounting groove is provided with a limiting protrusion corresponding to the limiting groove.

[0019] Compared with the prior art, the sealing gasket and control valve provided by this utility model have the following advantages: Due to the adoption of the above technical solution, this utility model has the advantages of simple structure, ingenious design and low cost. The sealing gasket with "Fu" shaped cross section enhances the radial sealing performance during sealing. When applied in control valves, it can avoid the problem of internal leakage caused by the medium flowing to adjacent flow channels. While solving the internal leakage of control valves by using the above sealing gasket, the external force required to make the sealing gasket and valve core end face fit tightly is reduced, avoiding the increase of friction force that the valve core needs to overcome to rotate, which would result in a larger torque required for the valve core to rotate, thereby greatly reducing the requirements for the output torque of the actuator. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a perspective view of the sealing gasket in Example 1; Figure 2 This is a top view of the sealing gasket in Example 1; Figure 3 for Figure 2 A cross-sectional view of surface AA; Figure 4 This is a cross-sectional view of the control valve in Embodiment 1; Figure 5 This is a top view of the housing in Embodiment 1; Figure 6 A cross-sectional view of the sealing gasket in Example 2. Figure 1 ; Figure 7 This is a cross-sectional view of the control valve in Embodiment 2; Figure 8 A cross-sectional view of the sealing gasket in Example 2. Figure 2 .

[0021] Among them, 100 is the sealing gasket; 1 is the sealing rib; 11 is the inner ring section; 12 is the outer ring section; 13 is the connecting section; 2 is the upper protrusion; 3 is the support section; 4 is the sealing support; 41 is the first support; 42 is the second support; 51 is the first groove; 52 is the second groove; 521 is the vertical section; 522 is the curved section; 523 is the protrusion; 53 is the third groove; 6 is the limiting groove; 200 is the housing; 201 is the mounting groove; 2011 is the sealing section; 2012 is the transition section; 2013 is the support section; 202 is the limiting protrusion; and 300 is the valve core. Detailed Implementation

[0022] 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, other drawings can be obtained based on these drawings without creative effort.

[0023] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0024] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort. Example

[0028] See Figure 1 and Figure 3, this embodiment discloses a gasket 100, which includes a sealing rib 1, an upper convex portion 2 located at the top of the sealing rib 1, support portions 3 symmetrically arranged on both sides of the sealing rib 1, and sealing branch portions 4 located below the support portions 3 and symmetrically arranged on both sides of the sealing rib 1. The sealing rib 1, the upper convex portion 2, the support portions 3, and the sealing branch portions 4 are integrally formed.

[0029] The overall shape of the gasket 100 is formed by the design distribution of the sealing rib 1 according to the intersection structure to be sealed. The cross-section of the sealing rib 1 is in the shape of "Fu", and this "Fu" shape structure is jointly formed by the sealing rib 1, the upper convex portion 2, the support portions 3, and the sealing branch portions 4.

[0030] See Figure 2 , in this embodiment, the gasket 100 includes an inner ring section 11, an outer ring section 12, and a plurality of connecting sections 13 located between the inner ring section 11 and the outer ring section 12. The inner ring section 11, the outer ring section 12, and the connecting sections 13 are all composed of the sealing rib 1. The connecting sections 13 extend from the inner ring section 11 to the outer ring section 12. Specifically, the inner ring section 11 and the outer ring section 12 are coaxially arranged, and the connecting sections 13 are arranged radially.

[0031] See Figure 3 , the sealing branch portion 4 includes a first branch portion 41 and a second branch portion 42. The first branch portion 41 and the second branch portion 42 are both symmetrically arranged on both sides of the sealing rib 1. The first branch portion 41 is located between the support portion 3 and the second branch portion 42. The support portion 3 protrudes from the sealing rib 1 to both sides in a convex strip shape, and the cross-section of the support portion 3 is rectangular. The first branch portion 41 protrudes from the sealing rib 1 to both sides, and the cross-section of the first branch portion 41 is in the shape of a hill and converges outward from the sealing rib 1. The second branch portion 42 extends downward from the sealing rib 1 and expands to both sides at the same time. There is a first groove 51 between the second branch portions 42 on both sides. The cross-section of the first groove 51 is in the shape of a V, and in other embodiments, the cross-section of the first groove 51 can also be set as an arc.

[0032] There is a second groove 52 between the support portion 3 and the first branch portion 41 on the same side. The cross-section of the second groove 52 includes a vertical segment 521 extending vertically downward from the support portion 3 and a curved segment 522 transitioning from the vertical segment 521 to the first branch portion 41. There is a third groove 53 between the first branch portion 41 and the second branch portion 42 on the same side, and the cross-section of the third groove 53 is in the shape of an arc.

[0033] There is a limiting groove 6 recessed inward at the bottom of the sealing rib 1. The limiting groove 6 is located at the connection of the inner ring section 11, the outer ring section 12, and the connecting section 13. The limiting groove 6 is communicated with the first groove 51 on the connecting section 13. In other embodiments, the limiting groove 6 can be communicated with the first grooves 51 on the inner ring section 11, the outer ring section 12, and the connecting section 13.

[0034] See Figure 4 and Figure 5 This embodiment also discloses a control valve, including a housing 200, a valve core 300, and the aforementioned sealing gasket 100. The housing 200 has an installation groove 201, and the sealing gasket 100 is installed within the installation groove 201. The valve core 300 is located within the housing 200 and contacts and presses against the upper protrusion 2. The bottom of the installation groove 201 has a limiting protrusion 202 corresponding to the limiting groove 6. The limiting protrusion 202 protrudes vertically upward from the bottom of the installation groove 201 and is used to cooperate with the limiting groove 6 to prevent the valve core 300 from rotating and causing the sealing gasket 100 to rotate, resulting in sealing failure.

[0035] The top of the mounting groove 201 is wider than the bottom. From bottom to top, the mounting groove 201 includes a sealing section 2011, a transition section 2012, and a support section 2013. The width of the support section 2013 is greater than the width of the sealing section 2011, and the transition section 2012 extends in an expanding manner from the sealing section 2011 to the support section 2013. When the sealing gasket 100 is installed in the mounting groove 201, the support portion 3 is located within the support section 2013 and has a clearance fit with the mounting groove 201 at the support section 2013, while the first support portion 41 and the second support portion 42 are located within the sealing section 2011 and have an interference fit with the mounting groove 201 at the sealing section 2011.

[0036] The valve core 300 presses the sealing gasket 100 into the mounting groove 201. At this time, the upper protrusion 2 is pressed tightly against the bottom surface of the valve core 300, the first branch 41 is interference-fitted with the side wall of the mounting groove 201 at the sealing section 2011, and the second branch 42 is interference-fitted with the side wall of the mounting groove 201 at the sealing section 2011 while being pressed tightly against the bottom surface of the mounting groove 201. The sealing gasket 100 is made of rubber, and a PTFE film is provided on the surface of the upper protrusion 2, which contacts the bottom surface of the valve core 300 through the PTFE film layer.

[0037] During use, the water valve is filled with liquid. When the liquid pressure is low, the liquid enters the second groove 52 through the gap between the support part 3 and the side wall of the support section 2013. At this time, the liquid cannot push open the first support 41 to enter the third groove 53. When the liquid pressure increases to a certain level, the liquid will push open the first support 41 to enter the third groove 53, causing the second support 42 to press further against the bottom surface of the sealing section 2011. The axial self-sealing effect of the control valve is achieved through liquid pressure. At this time, the effective pressure of the sealing surface at the pressing point is equal to the sum of the pre-pressure generated by the elastic deformation of the sealing gasket 100 and the liquid pressure.

[0038] Among them, the support part 3 mainly plays the role of support, positioning and anti-tipping. The first branch 41 is radially compressed and plays the role of radial auxiliary sealing. The second branch 42 plays the role of radial reinforcement sealing and achieves the self-sealing effect with the mounting groove 201. Under the combined effect of the above structures, the sealing gasket 100 and the mounting groove 201 in the housing 200 have a good sealing effect, especially in the multi-way valve with rotary control, its sealing advantage is particularly prominent.

[0039] The sealing structure of this embodiment effectively reduces internal leakage while requiring less external force to ensure a tight fit between the sealing gasket 100 and the valve core 300 end face. Therefore, the frictional force that the valve core 300 needs to overcome to rotate is less, resulting in less torque required for rotation. This significantly reduces the requirements for the actuator's output torque, which in turn reduces the performance requirements for the actuator's motor and transmission system. Example

[0040] See Figure 6 and Figure 7 The difference between this embodiment and Embodiment 1 lies in the sealing support 4. In this embodiment, the sealing support 4 also includes a first support 41 and a second support 42. The first support 41 protrudes from the sealing rib 1 to both sides, and its cross-section is convex conical (similar to a hill), converging outward from the sealing rib 1. Its protruding thickness is thicker than that of the first support 41 in Embodiment 1, and the width of the conical bottom is wider than that in Embodiment 1. During installation, the interference fit is larger, resulting in a larger compression and a stronger sealing effect. Under this structure, the sealing gasket 100 mainly achieves radial sealing through the interference fit between the first support 41 and the side wall of the sealing section 2011.

[0041] See Figure 7 and Figure 8 The second branch 42 extends downward from the sealing rib 1. A first groove 51 is provided between the two second branches 42, and the cross-section of the first groove 51 is arc-shaped, U-shaped in this embodiment. The second branch 42 mainly serves to support the axial direction. A second groove 52 is provided between the support part 3 and the first branch 41, and no third groove 53 is provided between the first branch 41 and the second branch 42. The lower surface of the first branch 41 and the outer surface of the second branch 42 are on the same plane, that is, the outer surface of the second branch 42 extends from top to bottom to the first branch 41, and is inclined from the inside to the outside. When it is set in the mounting groove 201, there is a space between the outer surface of the second branch 42 and the side wall of the sealing section 2011. Protrusions 523 are provided at intervals in the second groove 52 to strengthen the support and ensure the strength of the sealing gasket 100 without affecting it.

[0042] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A sealing gasket, characterized in that, Comprising: Sealing ribs, the gasket is integrally formed by connecting a plurality of sealing ribs distributed; Upper convex part, the upper convex part is located at the top of the sealing rib and is used to abut against the bottom of the valve core; Support part, the support part is symmetrically arranged on both sides of the sealing rib; Sealing branch part, the sealing branch part is located below the support part and is symmetrically arranged on both sides of the sealing rib.

2. The sealing gasket as claimed in claim 1, characterized in that, The cross-section of the sealing rib is in the shape of "fu", the sealing branch part includes a first branch part and a second branch part, the first branch part is located between the support part and the second branch part, the first branch part is symmetrically arranged on both sides of the sealing rib, and the second branch part is symmetrically arranged on both sides of the sealing rib.

3. The sealing gasket as described in claim 2, characterized in that, The support part protrudes from the sealing rib to both sides in a convex strip shape, and the cross-section of the support part is rectangular.

4. The sealing gasket as described in claim 3, characterized in that, The first branch part protrudes from the sealing rib to both sides, and the cross-section of the first branch part is in the shape of a hill and converges outward from the sealing rib.

5. The sealing gasket as described in claim 4, characterized in that, The second branch part extends downward from the sealing rib and expands to both sides at the same time, and a first groove is provided between the second branch parts on both sides, and the cross-section of the first groove is arc-shaped or V-shaped.

6. The sealing gasket as described in claim 5, characterized in that, A second groove is provided between the support part and the first branch part on the same side, and the cross-section of the second groove includes a vertical section vertically downward from the support part and a bending section transitioning from the vertical section to the first branch part.

7. The sealing gasket as claimed in claim 6, characterized in that, A third groove is provided between the first branch part and the second branch part on the same side, and the cross-section of the third groove is arc-shaped.

8. The sealing gasket as claimed in claim 3, characterized in that, The first branch part protrudes from the sealing rib to both sides, the second branch part extends downward from the sealing rib, and a first groove is provided between the second branch parts on both sides, and the cross-section of the first groove is arc-shaped.

9. The sealing gasket as claimed in claim 2, characterized in that, It further includes an inner ring section, an outer ring section and a plurality of connecting sections located between the inner ring section and the outer ring section. The inner ring section, the outer ring section and the connecting sections are all composed of sealing ribs, and the connecting sections extend from the inner ring section to the outer ring section.

10. The sealing gasket as claimed in claim 9, characterized in that, A limiting groove is provided at the bottom of the sealing rib and is located at the connection of the inner ring section, the outer ring section and the connecting section.

11. A control valve, characterized in that, Comprising a housing, a valve core and the gasket according to any one of claims 1 to 9 above. An installation groove is provided in the housing, the gasket is arranged in the installation groove, and the valve core is arranged in the housing and presses above the gasket.

12. The control valve as claimed in claim 11, characterized in that, The top of the installation groove is wider than the bottom. The installation groove sequentially includes a sealing section, a transition section and a support section from bottom to top. The width of the support section is greater than the width of the sealing section. The transition section extends in an expanding shape from the sealing section to the support section. When the gasket is installed in the installation groove, the support part is located in the support section and has a clearance fit with the installation groove at the support section, and the first branch part and the second branch part are located in the sealing section and have an interference fit with the installation groove at the sealing section.

13. A control valve, characterized in that, Comprising a housing and the gasket according to claim 10 above. The housing is provided with an installation groove for installing the gasket, and a limiting protrusion corresponding to the limiting groove is provided at the bottom of the installation groove.

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