Sealing gasket and multi-way valve

Abstract

The utility model belongs to the technical field of valves, and provides a sealing gasket and a multi-way valve, the sealing gasket comprises a base section, the base section extends along the plane where the sealing gasket is located, the base section of the base section is perpendicular to the extending direction of the base section, the base section is provided with a top edge, a bottom edge and two opposite side edges located between the top edge and the bottom edge, the top edge is located on the upper top face of the sealing gasket, and the bottom edge is located on the lower top face of the sealing gasket. The bottom edge is located on the lower bottom face of the sealing gasket, the two side edges are located on the two opposite side faces of the base section respectively, a protruding part protruding upwards is arranged in the middle of the top edge, the top edge gradually transits upwards to the protruding part from the end to the middle, and the side edges gradually deflect towards the interior of the base section from top to bottom. According to the multi-way valve, the compression amount of the sealing gasket when a moving component passes through the protruding part is reduced, the movement resistance of the multi-way valve in the processes of opening, switching, closing and the like can be reduced, the sealing gasket can be clamped into the mounting groove and other structures, and the installability of the sealing gasket is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, in particular to a sealing pad and a multi-way valve. Background Art

[0002] The multi-way valve usually contains components that move relative to each other, and sealing gaskets are arranged between the components that move relative to each other to achieve sealing between the two components that move relative to each other. The existing sealing gasket is usually arranged on one of the components and keeps a sealing fit with the other component that moves relative to each other, so as to achieve sealing. During the opening, closing, and conversion of the multi-way valve, the components that move relative to each other move, and the moving components also move relative to the sealing gasket. When the moving component moves relative to the sealing gasket, the moving component will periodically pass through and squeeze the upper top surface of the sealing gasket. In order to ensure the degree of fit between the existing sealing gasket and the moving component, its upper top surface is usually flat. When the moving component passes through the top surface of the sealing gasket, the compression amount of the upper top surface of the sealing gasket is large, resulting in a large movement resistance of the moving component, affecting the smoothness of the multi-way valve during the opening and conversion process. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sealing gasket and a multi-way valve, which are used to solve the problems of the multi-way valve in the prior art in the process of opening, switching, etc., which have poor smoothness.

[0004] To achieve the above-mentioned purpose and other related purposes, the utility model provides a sealing gasket, comprising a base section, the base section extending along the plane where the sealing gasket is located, the base cross section of the base section being perpendicular to the extension direction of the base section, the base cross section having a top edge, a bottom edge and two oppositely arranged side edges located between the top edge and the bottom edge, the top edge being located on the upper top surface of the sealing gasket, the bottom edge being located on the lower bottom surface of the sealing gasket, and the two side edges being respectively located on two opposite side surfaces of the base section,

[0005] The middle portion of the top edge has a protruding portion protruding upward, the top edge gradually transitions upward from the end portion to the middle portion to the protruding portion, and the side edge gradually deflects toward the inside of the basic cross section from top to bottom.

[0006] Optionally, the base segment includes a base body and a smooth wear-resistant layer covering the base body, and an outer surface of the smooth wear-resistant layer facing away from the base body is an upper top surface of the base segment.

[0007] Optionally, the edge of the smooth wear-resistant layer close to the side surface of the base segment extends downward to form a protection portion, and the protection portion at least covers a portion of the side surface of the base segment.

[0008] Optionally, a dimension of the base segment in a thickness direction of the sealing gasket is H, a dimension of the protection portion in the thickness direction of the sealing gasket is h, and h>0.1H.

[0009] Optionally, the material of the substrate is EPDM rubber, and the material of the smooth wear-resistant layer is polytetrafluoroethylene.

[0010] Optionally, the angle between the side edge and the thickness direction of the sealing gasket is a, 0°<a≤30°, the part between the end of the top edge and the protrusion is a transition portion, and the angle between the extension direction of the transition portion and the thickness direction of the sealing gasket is b, b<60°.

[0011] Optionally, the basic cross section has a center line arranged along the thickness direction of the sealing gasket, and the basic cross section is symmetrical about the center line axis.

[0012] Optionally, the sealing gasket includes an outer ring and an inner ring sleeved in the outer ring, the outer ring and the inner ring are connected with spokes extending radially along the outer ring, and a depression is provided on the upper surface of the sealing gasket, and the depression is provided at the connection between the spoke and the outer ring and / or at the connection between the spoke and the inner ring.

[0013] The utility model also provides a multi-way valve, comprising a moving valve core, a static valve core and a sealing gasket as described in any one of the above items, wherein the moving valve core is movably arranged relative to the static valve core, the sealing gasket is arranged between the moving valve core and the static valve core, and the moving valve core and the static valve core are sealed and connected via the sealing gasket.

[0014] The utility model also provides a multi-way valve, comprising a moving valve core, a static valve core and the sealing gasket as described above, wherein the moving valve core is arranged to move relative to the static valve core, the sealing gasket is arranged between the moving valve core and the static valve core, and the moving valve core and the static valve core are sealed and connected via the sealing gasket.

[0015] The static valve core is provided with a mounting groove, the base section is clamped in the mounting groove, and the protection portion at least partially extends into the mounting groove.

[0016] As described above, a sealing gasket and a multi-way valve of the utility model have the following beneficial effects: since the middle part of the top edge of the base section has a protruding portion protruding upward, and the width of the protruding portion is smaller than the overall width of the base section, the compression amount of the sealing gasket when the moving component passes through the protruding portion is reduced, which is beneficial to reducing the movement resistance of the multi-way valve during the opening, switching, closing, etc. The end of the top edge gradually transitions upward to the protruding portion, so that the movement resistance of the multi-way valve during the opening, switching, closing, etc. changes smoothly, which is beneficial to improving the smoothness of the multi-way valve during the opening, switching, closing, etc. At the same time, the side of the base section gradually deflects from top to bottom toward the inside of the base section, that is, the width dimension of the bottom surface of the base section is small, which is beneficial for the sealing gasket to be inserted into the installation groove and other structures, thereby improving the installability of the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the sealing gasket in the embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view of the sealing gasket in the embodiment of the utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0021] Figure 5 It is a schematic diagram of the dimensions of the basic cross section in the embodiment of the utility model.

[0022] Explanation of the reference numerals: outer ring 1 , inner ring 2 , spoke 3 , protrusion 4 , transition portion 5 , protection portion 6 , side edge 7 , bottom edge 8 , smooth wear-resistant layer 9 , base 10 , upper top surface 11 , lower bottom surface 12 , recess 13 . DETAILED DESCRIPTION

[0023] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0025] See also Figures 1 to 5 The present embodiment provides a sealing gasket, comprising a base section, which extends along a plane where the sealing gasket is located. The base section of the base section is perpendicular to the extension direction of the base section, and the base section has a top edge, a bottom edge 8, and two oppositely arranged side edges 7 located between the top edge and the bottom edge 8, the top edge is located at the upper top surface 11 of the sealing gasket, the bottom edge 8 is located at the lower bottom surface 12 of the sealing gasket, and the two side edges 7 are respectively located at two opposite side surfaces of the base section.

[0026] The middle part of the top edge has a protrusion 4 protruding upward, that is, the protrusion 4 protrudes outward from the rest of the base section along the thickness direction of the sealing gasket. The width of the protrusion 4 is smaller than the overall width of the base section, which reduces the compression of the sealing gasket when the moving component passes through the protrusion 4, which is beneficial to reduce the movement resistance of the multi-way valve during opening, switching, closing, etc.

[0027] The top edge gradually transitions upward from the end to the middle to the protrusion 4, so that the movement resistance of the multi-way valve changes smoothly during the opening, switching, and closing processes, which is beneficial to improving the smoothness of the multi-way valve during the opening, switching, and closing processes.

[0028] At the same time, the side edge 7 gradually tilts toward the base cross section from top to bottom, and the bottom edge 8 is relatively short, that is, the width of the bottom surface of the base section is relatively small, which is conducive to the sealing gasket being inserted into the installation groove and other structures, thereby facilitating the installation of the sealing gasket.

[0029] like Figure 1 to Figure 3 As shown, in this embodiment, the sealing gasket includes an outer ring 1 and an inner ring 2 sleeved in the outer ring 1, and spokes 3 extending radially along the outer ring 1 are connected between the outer ring 1 and the inner ring 2, and a recess 13 is provided on the upper surface of the sealing gasket, and the recess 13 is provided at the connection between the spoke 3 and the outer ring 1 and / or at the connection between the spoke 3 and the inner ring 2.

[0030] In this embodiment, the outer ring 1, the inner ring 2 and the spokes 3 are all formed by extending the base section in the plane where the sealing gasket is located. The basic cross-sectional structures of the outer ring 1, the inner ring 2 and the spokes 3 are the same. The specific sizes and proportions of the basic cross-sectional structures of the outer ring 1, the inner ring 2 and the spokes 3 can be adjusted accordingly according to the functions and effects of the outer ring 1, the inner ring 2 and the spokes 3.

[0031] The strength of the connection between the spoke 3 and the outer ring 1 and the connection between the spoke 3 and the inner ring 2 in the thickness direction of the gasket is higher than that of other positions, and the deformation is small under the same force, which is not conducive to the fitting of the gasket with the sealed component and the smooth sliding of the moving components in the valve body. The gasket is provided with a recess 13 at the connection between the spoke 3 and the outer ring 1 and / or the connection between the spoke 3 and the inner ring 2, which can reduce the strength of the gasket in the thickness direction at the position where the recess 13 is provided, which is conducive to making the compression deformation of each position of the gasket balanced to ensure the sealing effect, and allowing the moving components in the valve body to slide smoothly, which is conducive to maintaining the smoothness of the movement of the moving components of the valve body.

[0032] like Figure 4 As shown, in this embodiment, the base section includes a base body 10 and a smooth wear-resistant layer 9 covering the base body 10, and the outer surface of the smooth wear-resistant layer 9 facing away from the base body 10 is the upper top surface 11 of the base section. In this embodiment, the material of the base body 10 is EPDM (ethylene propylene diene monomer), and the material of the smooth wear-resistant layer 9 is polytetrafluoroethylene (polytetrafluoroethylene, PTFE). EPDM has good weather resistance and excellent aging resistance. It can maintain elasticity for a long time even under harsh working conditions, so that the sealing gasket can maintain a long-term good contact with the moving components, which is beneficial to increase the long-term sealing performance of the multi-way valve. Polytetrafluoroethylene has good wear resistance and can increase the service life of the sealing gasket. Polytetrafluoroethylene has a low friction coefficient and can play a lubricating role, reducing the movement resistance between the sealing gasket and the moving components of the multi-way valve during relative movement, which is beneficial to improve the smoothness of the multi-way valve during opening, switching, closing, etc. The EPDM rubber matrix 10 cooperates with the smooth wear-resistant layer 9 of polytetrafluoroethylene, which not only makes the sealing gasket fit well with the moving component, but also improves the wear resistance of the sealing gasket and reduces the sliding resistance between the sealing gasket and the moving component of the multi-way valve, making the multi-way valve switching process smoother.

[0033] In this embodiment, the edge of the smooth wear-resistant layer 9 close to the side of the base section extends downward to form the protection portion 6, that is, the edge of the smooth wear-resistant layer 9 close to the side of the base section extends toward the lower bottom surface 12 of the base section to form the protection portion 6, and the protection portion 6 covers at least part of the side of the base section. When the moving component of the multi-way valve slides relative to the sealing gasket, the side of the base section is exposed in the installation groove, and the protection portion 6 can also provide protection for the part of the base section exposed in the installation groove, which is conducive to increasing the service life of the sealing gasket.

[0034] In this embodiment, the edges of the smooth wear-resistant layer 9 close to both sides of the base section extend downward to form protection parts 6, that is, the side surfaces of both sides of the base section are provided with protection parts 6 to increase the protection effect of the base section.

[0035] like Figure 5 As shown, in this embodiment, the size of the base segment in the thickness direction of the gasket is H, and the size of the protection portion 6 in the thickness direction of the gasket is h, and h>0.1H. The size h in the thickness direction of the gasket is greater than 0.1 times the size H of the base segment in the thickness direction of the gasket, which ensures the coverage of the protection portion 6 and increases the protection effect.

[0036] In this embodiment, the angle between the side edge 7 and the thickness direction of the gasket is a, 0°<a≤30°. The portion between the end of the top edge and the protrusion 4 is the transition portion 5, and the angle between the extension direction of the transition portion 5 and the thickness direction of the gasket is b, b<60°. The angle between the side edge 7 and the thickness direction of the gasket is the acute angle formed between the side edge 7 and the thickness direction of the gasket, and the angle between the extension direction of the transition portion 5 and the thickness direction of the gasket is the acute angle formed between the extension direction of the transition portion 5 and the thickness direction of the gasket, 0°<a≤30°, which makes it easy to install the gasket in the installation groove, and also makes the lower half of the gasket have sufficient strength to ensure the compression effect between the gasket and the moving component.

[0037] like Figure 4 , Figure 5 As shown, in this embodiment, the basic cross section has a center line arranged along the thickness direction of the gasket, and the basic cross section is symmetrical about the center line axis. The basic cross section is symmetrical about the center line axis, so that the resistance of the moving component when sliding through the gasket in the forward or reverse direction is the same. At the same time, the gasket is usually injection molded, and the basic cross section is symmetrical about the center line axis, which is conducive to reducing the difficulty of processing the gasket mold.

[0038] This embodiment also provides a multi-way valve, including a moving valve core, a static valve core and a sealing gasket as described above, wherein the moving valve core is arranged to move relative to the static valve core, the sealing gasket is arranged between the moving valve core and the static valve core, and the moving valve core and the static valve core are sealed and connected via the sealing gasket. In this embodiment, the multi-way valve is a four-way valve. The spokes 3 of the sealing gasket divide the area between the outer ring 1 and the inner ring 2 into four mutually separated closed areas, each of which corresponds to the four hole grooves of the four-way valve.

[0039] Specifically, in this embodiment, a mounting groove is provided on the static valve core, the base section is clamped in the mounting groove, and the protection portion 6 at least partially extends into the mounting groove. When the moving valve core (moving component of the multi-way valve) slides relative to the sealing gasket, the sealing gasket is deflected to a certain extent, and the portion of the base section originally located in the mounting groove will be exposed outside the mounting groove. Since the protection portion 6 partially extends into the mounting groove, when the portion of the base section originally located in the mounting groove is exposed outside the mounting groove, the portion of the protection portion 6 extending into the mounting groove will provide protection for the exposed portion of the base section, thereby increasing the service life of the seal.

[0040] In summary, the sealing gasket and multi-way valve of this embodiment have an upwardly protruding portion in the middle of the top edge of the base section, and the width of the protruding portion is smaller than the overall width of the base section, which reduces the compression of the sealing gasket when the moving component passes through the protruding portion, which is beneficial to reducing the movement resistance of the multi-way valve during the opening, switching, closing, etc. The end of the top edge gradually transitions upward to the protruding portion, so that the movement resistance of the multi-way valve during the opening, switching, closing, etc. changes smoothly, which is beneficial to improving the smoothness of the multi-way valve during the opening, switching, closing, etc. At the same time, the side of the base section gradually deflects toward the inside of the base section from top to bottom, that is, the width of the bottom surface of the base section is small, which is beneficial to the sealing gasket being inserted into the installation groove and other structures, thereby improving the installability of the sealing gasket.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A sealing gasket, characterized in that: The sealing gasket comprises a base section, the base section extends along the plane where the sealing gasket is located, the base section of the base section is perpendicular to the extension direction of the base section, the base section has a top edge, a bottom edge and two oppositely arranged side edges located between the top edge and the bottom edge, the top edge is located on the upper top surface of the sealing gasket, the bottom edge is located on the lower bottom surface of the sealing gasket, and the two side edges are respectively located on two opposite side surfaces of the base section, The middle portion of the top edge has a protruding portion protruding upward, the top edge gradually transitions upward from the end portion to the middle portion to the protruding portion, and the side edge gradually deflects toward the inside of the basic cross section from top to bottom.

2. The sealing gasket according to claim 1, characterized in that: The base section comprises a base body and a smooth wear-resistant layer covering the base body, and the outer surface of the smooth wear-resistant layer facing away from the base body is the upper top surface of the base section.

3. The sealing gasket according to claim 2, characterized in that: The edge of the smooth wear-resistant layer close to the side surface of the base segment extends downward to form a protection portion, and the protection portion at least covers a portion of the side surface of the base segment.

4. The sealing gasket according to claim 3, characterized in that: The size of the base segment in the thickness direction of the sealing gasket is H, the size of the protection portion in the thickness direction of the sealing gasket is h, and h>0.1H.

5. The sealing gasket according to claim 2, characterized in that: The material of the substrate is EPDM rubber, and the material of the smooth wear-resistant layer is polytetrafluoroethylene.

6. The sealing gasket according to claim 1, characterized in that: The angle between the side edge and the thickness direction of the sealing gasket is a, 0°<a≤30°, the portion between the end of the top edge and the protrusion is a transition portion, and the angle between the extension direction of the transition portion and the thickness direction of the sealing gasket is b, b<60°.

7. The sealing gasket according to claim 1, characterized in that: The basic cross section has a center line arranged along the thickness direction of the sealing gasket, and the basic cross section is symmetrical about the center line axis.

8. The sealing gasket according to claim 1, characterized in that: The sealing gasket includes an outer ring and an inner ring sleeved in the outer ring, and spokes extending radially along the outer ring are connected between the outer ring and the inner ring. A depression is provided on the upper surface of the sealing gasket, and the depression is provided at the connection between the spoke and the outer ring and / or at the connection between the spoke and the inner ring.

9. A multi-way valve, characterized in that: It comprises a moving valve core, a static valve core and a sealing gasket as claimed in any one of claims 1 to 8, wherein the moving valve core is movably arranged relative to the static valve core, the sealing gasket is arranged between the moving valve core and the static valve core, and the moving valve core and the static valve core are sealed and connected via the sealing gasket.

10. A multi-way valve, characterized in that: It includes a moving valve core, a static valve core and a sealing gasket as described in claim 3 or 4, the moving valve core is movably arranged relative to the static valve core, the sealing gasket is arranged between the moving valve core and the static valve core, the moving valve core and the static valve core are sealed and connected via the sealing gasket, a mounting groove is arranged on the static valve core, the base section is clamped in the mounting groove, and the protective portion at least partially extends into the mounting groove.

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