Control valve seals and control valve

Abstract

This application relates to the field of fluid control technology, specifically to a seal for a control valve and a control valve. The seal includes: a seal body comprising a first edge and a second edge disposed opposite to each other along a first direction; a first limiting structure and a second limiting structure, the first limiting structure being disposed at the first edge and the second limiting structure being disposed at the second edge, the first limiting structure and the second limiting structure respectively engaging with the housing of the control valve to limit relative rotation between the seal and the housing; wherein the first limiting structure includes a plurality of first sub-limiting portions, the plurality of first sub-limiting portions being spaced apart at the first edge; a second limiting structure is provided between adjacent first sub-limiting portions; or, the second limiting structure includes a plurality of second sub-limiting portions, the plurality of second sub-limiting portions being spaced apart at the second edge; a first limiting structure is provided between adjacent second sub-limiting portions. This seal can reduce the risk of internal leakage in the control valve.

Description

Technical Field

[0001] This application relates to the field of fluid control, and more specifically, to a seal for a control valve and a control valve. Background Technology

[0002] A control valve is an automated valve that regulates the flow rate, pressure, or direction of fluids, and is widely used in industries such as industry, energy, and chemical engineering. Taking electronic water valves as an example, these devices control the flow of water via electrical signals and are widely used in vehicle thermal management, industrial equipment, and irrigation systems.

[0003] In related technologies, electronic water valves generally include a housing, a valve core, and a seal. The housing has multiple flow ports, and the seal is located between the valve core and the housing. The valve core rotates to achieve functions such as shut-off, flow diversion, or flow separation in the electronic water valve. When the valve core rotates, the seal and housing do not rotate with it. When the valve core connects to a specific flow port, the seal prevents fluid from leaking to other locations.

[0004] However, because the stability of the seal cannot be fully guaranteed, the valve core is prone to causing the seal to twist or become misaligned when it rotates, resulting in the seal not sealing properly at a specific flow port. This causes the fluid to flow to other non-predetermined locations, exacerbating the internal leakage of the electronic water valve. Utility Model Content

[0005] A primary objective of this application is to overcome at least one of the deficiencies of the prior art described above and to provide a seal for a control valve. This seal can reduce the risk of internal leakage in the control valve.

[0006] Another major objective of this application is to overcome at least one of the defects of the prior art described above and to provide a control valve with low risk of internal leakage and long service life.

[0007] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0008] According to one aspect of this application, a seal for a control valve includes: a seal body, the seal body including a first edge and a second edge disposed opposite to each other along a first direction; a first limiting structure and a second limiting structure, the first limiting structure being disposed at the first edge and the second limiting structure being disposed at the second edge, the first limiting structure and the second limiting structure respectively engaging with the housing of the control valve to limit the relative rotation of the seal and the housing;

[0009] The first limiting structure includes a plurality of first sub-limiting parts, which are spaced apart on the first edge; a second limiting structure is provided between adjacent first sub-limiting parts;

[0010] Alternatively, the second limiting structure includes a plurality of second sub-limiting parts, which are spaced apart on the second edge; a first limiting structure is provided between adjacent second sub-limiting parts.

[0011] According to one embodiment of this application, the first limiting structure includes a plurality of first sub-limiting portions, which are spaced apart on the first edge;

[0012] The second limiting structure includes a plurality of second sub-limiting parts, which are spaced apart on the second edge;

[0013] The second sub-limiting portion is located between the projections of the adjacent first sub-limiting portions onto the second edge along the first direction.

[0014] According to one embodiment of this application, the first limiting structure includes a plurality of first sub-limiting portions, which are spaced apart on the first edge;

[0015] The second limiting structure includes a plurality of second sub-limiting parts, and the first sub-limiting part is located between the projections of adjacent second sub-limiting parts along the first direction onto the first edge.

[0016] According to one embodiment of this application, a first sub-limiting portion located at the center of the first edge and a second sub-limiting portion located at the center of the second edge are disposed opposite to each other in a first direction.

[0017] According to one embodiment of this application, the first sub-limiting portion located outside the center of the first edge and the second sub-limiting portion located outside the center of the second edge are not disposed opposite each other in a first direction.

[0018] According to one embodiment of this application, a plurality of first sub-limiting portions and a plurality of second sub-limiting portions are not disposed opposite to each other in a first direction, but are spaced apart in the extension direction of the first edge.

[0019] According to one embodiment of this application, the maximum thickness of the first edge is different from the maximum thickness of the second edge.

[0020] According to one embodiment of this application, a plurality of first sub-limiting portions are arranged at equal intervals along the first edge; a plurality of second sub-limiting portions are arranged at equal intervals along the second edge.

[0021] And / or, the number of the first sub-limiting parts is between 2 and 5; the number of the second sub-limiting parts is between 2 and 5.

[0022] According to one embodiment of this application, the first sub-limiting portion is one of a limiting protrusion or a limiting groove; and / or, the second sub-limiting portion is one of a limiting protrusion or a limiting groove.

[0023] According to another aspect of this application, a control valve includes:

[0024] An outer shell having a receiving chamber, the outer shell including a first mating structure and a second mating structure;

[0025] The valve core is rotatably disposed in the receiving chamber;

[0026] A sealing element is disposed between the valve core and the inner wall of the receiving chamber, and the sealing element is the sealing element described above;

[0027] Wherein, the first mating structure is in a limiting fit with the first limiting structure, and the second mating structure is in a limiting fit with the second limiting structure.

[0028] According to one embodiment of this application, the housing includes a valve body and a valve cover, the valve body and the valve cover forming the receiving chamber;

[0029] The first mating structure includes a plurality of first sub-matting parts disposed on the valve cover, and the plurality of first sub-matting parts are inserted into and mated with the first limiting structure;

[0030] The second mating structure includes a plurality of second sub-matting parts disposed on the bottom plate of the valve body, and the plurality of second sub-matting parts are inserted into and mated with the second limiting structure.

[0031] According to one embodiment of this application, the seal includes a third edge and a fourth edge disposed opposite to each other in the extending direction of the first edge, the third edge and the fourth edge having a predetermined distance between them; the predetermined distance forms a notch penetrating the seal along the first direction.

[0032] The valve cover is also provided with a third limiting structure, which abuts against one end of the third edge and one end of the fourth edge respectively; the bottom plate of the valve body is also provided with a fourth limiting structure, which abuts against the other end of the third edge and the other end of the fourth edge respectively.

[0033] According to one embodiment of this application, the third limiting structure includes a limiting rib, the first end of the limiting rib abutting against one end of the third edge, and the second end of the limiting rib abutting against one end of the fourth edge.

[0034] According to one embodiment of this application, the fourth limiting structure includes two baffles spaced apart from the base plate, one of the two baffles abutting against the other end of the third edge, and the other of the two baffles abutting against the other end of the fourth edge.

[0035] An embodiment of the above application has at least the following advantages or beneficial effects:

[0036] When the valve core rotates using the seal of this application, due to the tight contact between the seal and the valve core, the seal tends to follow the rotation of the valve core due to the rotational friction force of the valve core. At this time, the limiting fit between the first limiting structure and the first mating structure reduces the risk of the seal following the valve core's rotation, thereby reducing the risk of deformation or misalignment of the seal. Correspondingly, the limiting fit between the second limiting structure and the second mating structure further reduces the risk of seal deformation or misalignment, thereby reducing the risk of internal leakage in the control valve.

[0037] When the first limiting structure includes multiple first sub-limiting parts, the multiple first sub-limiting parts are spaced apart at the first edge; a second limiting structure is provided between adjacent first sub-limiting parts. Thus, one of the adjacent first sub-limiting parts, together with the second limiting structure, limits and fixes the seal, and the second limiting structure, together with the other adjacent first sub-limiting part, limits and fixes the seal. The multiple first sub-limiting parts and the second limiting structure increase the number of limiting points along the extension direction of the seal, thereby enhancing the limiting and fixing effect on the seal and reducing the possibility of seal movement.

[0038] When the second limiting structure includes multiple second sub-limiting parts, the multiple second sub-limiting parts are spaced apart on the second edge; a first limiting structure is provided between adjacent second sub-limiting parts. In this way, one of the adjacent second sub-limiting parts and the first limiting structure limit and fix the seal, and the first limiting structure and the other of the adjacent second sub-limiting parts limit and fix the seal. The multiple second sub-limiting parts and the first limiting structure increase the number of limiting points in the extension direction of the seal, thereby enhancing the limiting and fixing effect on the seal and reducing the possibility of seal movement. Attached Figure Description

[0039] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts.

[0040] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the control valve of this application;

[0041] Figure 2 yes Figure 1 A three-dimensional structural diagram of the control valve after the actuator is removed;

[0042] Figure 3 yes Figure 2 Top view of the control valve;

[0043] Figure 4 yes Figure 3 A sectional view of the control valve along the AA direction;

[0044] Figure 5 This is a three-dimensional structural schematic diagram of the sealing element of the control valve of this application, according to a first embodiment.

[0045] Figure 6 This is a three-dimensional structural schematic diagram of a second embodiment of the sealing element of the control valve of this application;

[0046] Figure 7 yes Figure 2 A three-dimensional structural diagram of the valve cover of the control valve;

[0047] Figure 8 yes Figure 2 A three-dimensional structural diagram of the valve body of the control valve;

[0048] Figure 9 yes Figure 8 A top view of the valve body of the control valve.

[0049] The annotations in the attached figures are explained as follows:

[0050] 10. Seal; 20. Control valve; 110. Seal body; 111. First edge; 112. Second edge; 113. Third edge; 114. Fourth edge; 120. First limiting structure; 121. First sub-limiting part; 130. Second limiting structure; 131. Second sub-limiting part; 141. First rib structure; 142. Second rib structure; 210. Valve body; 211. Housing; 201. Container 202. Flow port; 2111. Valve cover; 2112. Valve body; 2112a. Base plate; 2112b. Cylinder; 213. First mating structure; 2131. First sub-matting part; 214. Second mating structure; 2141. Second sub-matting part; 215. Third limiting structure; 216. Fourth limiting structure; 217. Valve core; 220. Actuator; L. Centerline of seal; D1. First direction. Detailed Implementation

[0051] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0052] The features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0053] In related technologies, electronic water valves generally include a housing, a valve core, and a seal. The housing has multiple flow ports, and the seal is located between the valve core and the housing. The valve core rotates to achieve functions such as shut-off, flow diversion, or flow separation in the electronic water valve. When the valve core rotates, the seal and housing do not rotate with it. When the valve core connects to a specific flow port, the seal prevents fluid from leaking to other locations.

[0054] Currently, to limit the position of the sealing element and prevent it from rotating with the valve core, baffles and / or ribs are typically installed on the outer casing to restrict the rotation of the sealing element in the circumferential direction of the valve core. Specifically, the sealing element is usually designed to surround the valve core at 270°, meaning that there is a predetermined interval between the two edges of the sealing element in its extension direction. Baffles and / or limiting ribs can be installed on the outer casing at the predetermined intervals to limit the rotation of the sealing element in the circumferential direction of the valve core. However, after long-term research, the inventors discovered that because the baffles and / or limiting ribs are relatively concentrated in one position, the position closer to the center of the sealing element is more prone to misalignment with the rotation of the valve core, leading to an exacerbation of internal leakage.

[0055] This application provides a seal for a control valve and a control valve, which reduces the risk of the seal rotating with the valve core by increasing the limiting points between the housing and the seal and optimizing the setting position of these limiting points, thereby reducing the risk of internal leakage in the control valve.

[0056] The following describes an embodiment of the control valve of this application with reference to the accompanying drawings.

[0057] like Figure 1 As shown, an embodiment of the control valve 20 of this application includes: a valve body 210 and an actuator 220.

[0058] like Figures 2 to 4 As shown, the valve body 210 includes a housing 211, a valve core 217, and a seal 10.

[0059] Among them, such as Figure 4 As shown, the outer casing 211 has a receiving chamber 201 for accommodating the valve core 217 and the seal 10. The valve core 217 is rotatably disposed in the receiving chamber 201. The valve core 217 includes a core body and a rotating shaft. The core body is sleeved outside the rotating shaft, and the core body and the rotating shaft are fixedly connected. The outer casing 211 is provided with a through hole for the rotating shaft to pass through. A sealing structure is provided between the rotating shaft and the wall of the through hole to seal the gap between the rotating shaft and the through hole.

[0060] like Figure 1 and Figure 2 As shown, the actuator 220 of the control valve 20 is the core driving component of the control valve 20. It is responsible for converting the control signal into mechanical action to drive the valve core 217 to rotate, thereby achieving precise adjustment of the control valve 20.

[0061] like Figure 4 As shown, the seal 10 is disposed between the valve core 217 and the inner wall of the receiving chamber 201, that is, the seal 10 is interference-fitted with the outer wall of the valve core 217 and the inner wall of the receiving chamber 201. When the valve core 217 rotates, the seal 10 does not rotate with the valve core 217, but remains fixed in position relative to the outer casing 211. The outer casing 211 is provided with multiple flow ports 202 for fluid flow. The valve core 217 has an inner cavity. When the valve core 217 rotates, the inner cavity of the valve core 217 opens to different flow ports 202 to achieve switching of fluid flow paths.

[0062] Specifically, such as Figure 5 As shown, the sealing element 10 includes a sealing element body 110, a first limiting structure 120, and a second limiting structure 130. The sealing element body 110 includes a first edge 111 and a second edge 112 disposed opposite to each other along the axial direction of the valve core in the first direction D1. The first limiting structure 120 is disposed on the first edge 111, and the second limiting structure 130 is disposed on the second edge 112. The outer shell 211 is provided with a first mating structure 213 and a second mating structure 214. The first mating structure 213 engages with the first limiting structure 120 to limit the relative rotation between the first edge 111 of the sealing element 10 and the outer shell 211. The second mating structure engages with the second limiting structure 130 to limit the relative rotation between the second edge 112 of the sealing element 10 and the outer shell 211.

[0063] like Figure 4As shown, when the valve core 217 rotates, due to the tight contact between the seal 10 and the valve core, the seal 10 is affected by the rotational friction of the valve core 217 and tends to rotate with the valve core 217. At this time, the limiting cooperation between the first limiting structure 120 and the first mating structure 213 can reduce the risk of the seal 10 rotating with the valve core 217, thereby reducing the risk of deformation or misalignment of the seal 10. Correspondingly, the limiting cooperation between the second limiting structure 130 and the second mating structure 214 can further reduce the risk of deformation or misalignment of the seal 10, thereby reducing the risk of internal leakage of the control valve 20. In addition, since the seal 10 is not easy to rotate, the friction between the valve core 217 and the seal 10 and the friction between the seal and the valve body caused by the rotation of the seal is reduced, thus delaying the wear of the seal 10.

[0064] It should also be noted that the first mating structure 213 is set to correspond with the first limiting structure 120, and the second mating structure 214 is set to correspond with the second limiting structure 130, so as to ensure the stability of the limiting mating.

[0065] Furthermore, the first limiting structure 120 includes a plurality of first sub-limiting parts 121, which are spaced apart on the first edge 111; a second limiting structure 130 is provided between adjacent first sub-limiting parts 121.

[0066] Alternatively, in other embodiments, the second limiting structure 130 includes a plurality of second sub-limiting portions 131, which are spaced apart on the second edge 112; a first limiting structure 120 is provided between adjacent second sub-limiting portions 131.

[0067] When the first limiting structure includes multiple first sub-limiting parts, the multiple first sub-limiting parts are spaced apart at the first edge; a second limiting structure is provided between adjacent first sub-limiting parts. Thus, one of the adjacent first sub-limiting parts, together with the second limiting structure, limits and fixes the seal, and the second limiting structure, together with the other adjacent first sub-limiting part, limits and fixes the seal. The multiple first sub-limiting parts and the second limiting structure increase the number of limiting points along the extension direction of the seal, thereby enhancing the limiting and fixing effect on the seal and reducing the possibility of seal movement.

[0068] When the second limiting structure includes multiple second sub-limiting parts, the multiple second sub-limiting parts are spaced apart at the second edge; a first limiting structure is provided between adjacent second sub-limiting parts. Thus, one of the adjacent second sub-limiting parts, together with the first limiting structure, limits and fixes the seal, and the first limiting structure, together with the other adjacent second sub-limiting part, limits and fixes the seal. The multiple second sub-limiting parts and the first limiting structure increase the number of limiting points along the extension direction of the seal, thereby enhancing the limiting and fixing effect on the seal and reducing the possibility of seal movement.

[0069] Furthermore, in some embodiments, in the first embodiment of the seal 10, such as Figure 5 As shown, the first limiting structure 120 includes a plurality of first sub-limiting portions 121, which are spaced apart on the first edge 111. The second limiting structure 130 includes a plurality of second sub-limiting portions 131, which are spaced apart on the second edge 112. A second sub-limiting portion 131 is provided between adjacent first sub-limiting portions 121. Alternatively, a first sub-limiting portion 121 is provided between adjacent second sub-limiting portions 131.

[0070] Specifically, in the first embodiment, a plurality of first sub-limiting portions 121 are spaced apart along the first edge 111, increasing the limiting points for the seal 10 on the first edge 111 and ensuring that the limiting points for the seal 10 are evenly distributed along the first edge 111. When the valve core 217 rotates, the arrangement of the plurality of first sub-limiting portions 121 makes the position of the first edge 111 and the seal 10 near the first edge 111 more secure. When the seal 10 tends to rotate relative to the outer casing 211, the plurality of first sub-limiting portions 121 can jointly limit the seal 10, thereby making it less likely for the seal 10 to be misaligned following the rotation of the valve core 217, reducing the risk of internal leakage of the control valve 20.

[0071] Correspondingly, multiple second sub-limiting portions 131 are spaced apart on the second edge 112, increasing the limiting points for the seal 10 on the second edge 112 and ensuring that the limiting points for the seal 10 are evenly distributed on the second edge 112. When the valve core 217 rotates, the multiple second sub-limiting portions 131 make the position of the second edge 112 and the seal 10 near the second edge 112 more secure. When the seal 10 tends to rotate relative to the housing 211, the multiple second sub-limiting portions 131 can jointly limit the seal 10, making it less likely for the seal 10 to be misaligned following the rotation of the valve core 217, further reducing the risk of internal leakage in the control valve 20.

[0072] It should also be emphasized that a second sub-limiting part 131 is provided between adjacent first sub-limiting parts 121. This arrangement can increase the density of the upper limit points in the extension direction of the first edge 111 while minimizing the number of sub-limiting parts.

[0073] It is understandable that if too many sub-limiting portions are provided, the structural strength and sealing performance of the first edge 111 or the second edge 112 of the sealing member 10 will be affected. The provision of a second sub-limiting portion 131 between adjacent first sub-limiting portions 121 can effectively limit the sealing member 10 while controlling the number of first sub-limiting portions 121 or second sub-limiting portions 131. Of course, providing a first sub-limiting portion between adjacent second sub-limiting portions can also achieve the same effect, which will not be elaborated upon in this embodiment.

[0074] For example, such as Figure 5 As shown, the first sub-limiting portion 121 located at the center of the first edge 111 and the second sub-limiting portion 131 located at the center of the second edge 112 can be arranged opposite to each other in the first direction D1; the first sub-limiting portion 121 located outside the center of the first edge 111 and the second sub-limiting portion 131 located outside the center of the second edge 112 can be arranged offset in the extension direction of the first edge 111.

[0075] Specifically, a first sub-limiting portion 121 and a second sub-limiting portion 131 can be simultaneously provided at the center line L of the seal 10, that is, the center line L of the seal 10 passes through both the first sub-limiting portion 121 and the second sub-limiting portion 131. At positions other than the center line of the seal 10, the first sub-limiting portion 121 and the second sub-limiting portion 131 can be staggered. It should be noted that "staggered" means that the orthographic projection of the first sub-limiting portion 121 onto the second edge 112 does not overlap with the second sub-limiting portion 131.

[0076] Since the centerline L of the seal 10 is far from the third limiting structure 215 and the fourth limiting structure 216, it is more likely to misalign. Providing the first sub-limiting part 121 and the second sub-limiting part 131 at the centerline L of the seal 10 helps to limit the seal 10 at the centerline L of the seal 10, thereby further reducing the risk of seal misalignment.

[0077] like Figure 5As shown, the presence of a second sub-limiting portion 131 between adjacent first sub-limiting portions 121, or a first sub-limiting portion 121 between adjacent second sub-limiting portions 131, facilitates the assembly of the seal 10 and prevents the seal 10 from being reversed during assembly. It is understood that when multiple second sub-limiting portions 131 are tightly engaged with multiple second sub-fitting portions 2141, the seal 10 is considered to be assembled in the predetermined position. When the seal 10 is assembled in reverse, it is difficult to insert the seal 10 into the receiving chamber 201.

[0078] Furthermore, compared with related technologies, the sealing element in this embodiment of the application has multiple first sub-limiting portions 121 and multiple second sub-limiting portions, which improves the anti-internal leakage effect of the sealing element 10. Therefore, the thickness of the sealing element 10 can be reduced accordingly to reduce the torque of the control valve 20. The reduction of the torque of the control valve 20 helps to reduce the risk of the sealing element 10 moving or deforming along with the valve core 217, thereby helping to improve the anti-internal leakage effect of the control valve 20.

[0079] Furthermore, the seal 10 is prone to hardening after prolonged use, leading to failure of the limiting structure. Compared with related technologies, this application implements a system with multiple first sub-limiting parts 121 and multiple second sub-limiting parts 131. When one first sub-limiting part 121 or one second sub-limiting part 131 fails, the remaining first sub-limiting parts 121 and second sub-limiting parts 131 still perform the limiting function, thereby extending the service life of the seal 10 and thus extending the service life of the control valve 20.

[0080] Furthermore, in some embodiments, the maximum thickness of the first edge 111 is different from the maximum thickness of the second edge 112. Specifically, since the valve body is injection molded, the inner wall of the valve body that contacts the seal 10 has an inclination. Therefore, the seal 10 needs to take into account the inclination of the inner wall of the valve body when it is designed. Setting the maximum thickness of the first edge 111 of the seal to be different from the maximum thickness of the second edge 112 helps to improve the sealing performance of the seal 10.

[0081] It should be noted that, since a second sub-limiting part is provided between adjacent first sub-limiting parts, or a first limiting part is provided between adjacent second sub-limiting parts, the first edge 111 and the second edge 112 are not easily installed in reverse during the assembly of the seal, thereby further reducing the possibility of internal leakage of the control valve.

[0082] Furthermore, in the first embodiment, a plurality of first sub-limiting portions 121 may be disposed at intervals on the first edge 111; a plurality of second sub-limiting portions 131 may be disposed at intervals on the second edge 112, thereby ensuring the uniformity of force on the first sub-limiting portions 121 and the second sub-limiting portions 131, and avoiding the risk of failure of a certain first sub-limiting portion 121 or second sub-limiting portion 131 due to excessive stress.

[0083] Specifically, a plurality of first sub-limiting parts 121 may be evenly spaced, and a plurality of second sub-limiting parts 131 may be evenly spaced.

[0084] It should be noted that the number of first sub-limiting parts 121 is between 2 and 5; the number of second sub-limiting parts 131 is between 2 and 5. For example, as shown... Figure 5 As shown, there are three first sub-limiting portions 121, and the intervals between adjacent first sub-limiting portions 121 are uniform. There are three second sub-limiting portions 131, and the intervals between adjacent second sub-limiting portions 131 are uniform.

[0085] This application also provides a second embodiment of the seal, which differs from the first embodiment in that the arrangement of the plurality of first sub-limiting portions 121 and the plurality of second sub-limiting portions 131 is different.

[0086] Specifically, in the second embodiment, such as Figure 6 As shown, multiple first sub-limiting portions 121 and multiple second sub-limiting portions 131 are staggered in the extension direction of the first edge 111. This arrangement increases the density of the limiting positions in the extension direction of the first edge 111 with as few sub-limiting portions as possible, improving the stability of limiting the seal 10 without compromising its structural strength. Furthermore, when the fit between one sub-limiting portion and one mating portion fails, the remaining sub-limiting portions can still function, ensuring the sealing effect of the seal 10.

[0087] Furthermore, the position of the sub-limiting part can be set according to the arrangement of the longitudinal rib structure on the seal 10.

[0088] Specifically, the sealing element 10 further includes a plurality of first rib structures 141 and a plurality of second rib structures 142. The plurality of first rib structures 141 extend along a first direction D1 and are spaced apart along the extension direction of the first edge 111. The plurality of second rib structures 142 are also spaced apart along the extension direction of the first edge 111, and each second rib structure 142 is staggered with the plurality of first rib structures 141. Two adjacent first rib structures 141 can be distributed on both sides of the flow port 202, and together with the other two second rib structures 142, surround the flow port 202, achieving a sealing effect between the inner cavity of the valve core 217 and the flow port 202.

[0089] When considering the placement of the sub-limiting part, at least one of the first sub-limiting part 121 and the second sub-limiting part 131 can be provided between two adjacent first rib structures 141, thereby reducing the risk of misalignment of each first rib structure 141.

[0090] Furthermore, such as Figure 6 As shown, the first sub-limiting portion 121 and the second sub-limiting portion 131 can be alternately arranged between adjacent first rib structures 141. For example, the first rib structure 141 provided at the third edge 113 of the seal 10 is named the first longitudinal rib, the first rib structure 141 adjacent to the first longitudinal rib is named the second longitudinal rib, and so on, the remaining first rib structures 141 are named the third to eighth longitudinal ribs. If the first sub-limiting portion 121 is provided between the first longitudinal rib and the second longitudinal rib, then the second sub-limiting portion 131 can be provided between the second longitudinal rib and the third longitudinal rib, and the first sub-limiting portion 121 can be provided between the third longitudinal rib and the fourth longitudinal rib. This arrangement ensures that at least one sub-limiting portion is provided between two adjacent first rib structures 141, thereby effectively reducing the risk of misalignment of each first rib structure 141.

[0091] It should be noted that the minimum distance between the first sub-limiting part 121 and the first rib structure 141 is between 2mm and 3mm; the minimum distance between the second sub-limiting part 131 and the first rib structure 141 is between 2mm and 3mm.

[0092] In a third embodiment (not shown in the figure), a first limiting structure 120 and a second limiting structure 130 are both provided. The first limiting structure 120 and the second limiting structure 130 can be completely misaligned in the extension direction of the first edge 111, that is, the orthographic projection of the second limiting structure 130 on the first edge 111 is separate from the first limiting structure 120. Of course, the second limiting structure 130 and the first limiting structure 120 can also be partially misaligned in the extension direction of the first edge 111, that is, the orthographic projection of the second limiting structure 130 on the first edge 111 partially overlaps with the first limiting structure 120.

[0093] like Figure 7 As shown, in one embodiment, the housing 211 includes a valve body 2112 and a valve cover 2111, which together form a receiving chamber 201. The first mating structure 213 includes a plurality of first sub-matting parts 2131 disposed on the valve cover 2111. The plurality of first sub-matting parts 2131 are inserted into and mated with the first limiting structure 120, thereby reducing the risk of relative rotation between the seal 10 and the valve cover 2111.

[0094] like Figure 8 and Figure 9 As shown, the second mating structure 214 includes a plurality of second sub-matting parts 2141 disposed on the base plate 2112a of the valve body 2112. The plurality of second sub-matting parts 2141 are inserted into the second limiting structure 130, thereby reducing the risk of relative rotation between the seal 10 and the valve body 2112, and thus helping to reduce the risk of internal leakage of the control valve 20.

[0095] like Figure 4 , Figure 5 and Figure 7 As shown, in one embodiment, the seal 10 includes a third edge 113 and a fourth edge 114 disposed opposite to each other in the extending direction of the first edge 111, with a predetermined distance between the third edge 113 and the fourth edge 114, which forms a notch penetrating the seal 10 in the first direction; the valve cover 2111 is also provided with a third limiting structure 215, which abuts against one end of the third edge 113 and one end of the fourth edge 114 respectively.

[0096] In the above structure, in addition to the first limiting structure 120, a third limiting structure 215 is also provided between the seal 10 and the valve cover 2111. The third limiting structure 215 is used to limit the third edge 113 and the fourth edge 114 of the seal 10. When the third edge 113 tends to rotate with the valve core 217, the third limiting structure 215 can stop the third edge 113, thereby reducing the risk of movement of the seal 10. Correspondingly, when the fourth edge 114 tends to rotate with the valve core 217, the third limiting structure 215 can also stop the fourth edge 114.

[0097] Specifically, the third limiting structure 215 can be a limiting stop rib, with the first end of the limiting stop rib abutting against one end of the third edge 113 and the second end of the limiting stop rib abutting against one end of the fourth edge 114, thereby forming stops for the third edge 113 and the fourth edge 114 respectively.

[0098] It should be noted that the valve cover 2111, the first limiting structure 120, and the third limiting structure 215 are integrally injection molded.

[0099] Furthermore, such as Figure 8 and Figure 9 As shown, in one embodiment, the valve body 2112 includes a base plate 2112a and a cylindrical body 2112b disposed around the base plate 2112a. The sealing element 10 seals between the outer wall of the valve core 217 and the inner wall of the cylindrical body 2112b. A fourth limiting structure 216 is also provided on the base plate 2112a of the valve body 2112, and the fourth limiting structure 216 abuts against the other end of the third edge 113 and the other end of the fourth edge 114, respectively.

[0100] In addition to the second limiting structure 130, a fourth limiting structure 216 is provided between the valve body 2112 and the seal 10. When the third edge 113 of the seal 10 tends to rotate relative to the valve body 2112, the fourth limiting structure 216 can stop the third edge 113, thereby reducing the risk of movement of the seal 10. Correspondingly, when the fourth edge 114 tends to rotate with the valve body 2112, the fourth limiting structure 216 can also stop the fourth edge 114.

[0101] For example, the fourth limiting structure 216 can be two baffles, which are disposed on the base plate 2112a. One of the two baffles abuts against the other end of the third edge 113, and the other of the two baffles abuts against the other end of the fourth edge 114, so as to stop the third edge 113 and the fourth edge 114 respectively.

[0102] It should be noted that the valve body 2112, the second limiting structure 130, and the fourth limiting structure 216 are integrally injection molded.

[0103] Furthermore, the first sub-limiting part 121 is either a limiting protrusion or a limiting groove; the second sub-limiting part 131 is either a limiting protrusion or a limiting groove.

[0104] like Figure 5 As shown, the first sub-limiting part 121 and the second sub-limiting part 131 can both be configured as limiting grooves, and the first sub-fitting part 2131 and the second sub-fitting part 2141 can both be configured as limiting protrusions. By the insertion and engagement of the limiting protrusions and the limiting grooves, the limiting effect on the seal is achieved, thereby reducing the probability that the seal will rotate with the valve core.

[0105] Of course, in another embodiment, the first sub-limiting part and the second sub-limiting part can both be configured as limiting protrusions, and the first sub-fitting part 2131 and the second sub-fitting part 2141 can both be configured as limiting grooves.

[0106] In another embodiment, the first sub-limiting portion can be configured as a limiting groove, and the first sub-fitting portion 2131 can be configured as a limiting protrusion. The second sub-limiting portion can be configured as a limiting protrusion, and the second sub-fitting portion 2141 can be configured as a limiting groove.

[0107] It should also be noted that in some embodiments, when both the first sub-limiting part 121 and the second sub-limiting part 131 are limiting grooves, the limiting grooves can completely or partially penetrate the sealing member 10 in the thickness direction of the sealing member 10.

[0108] Under normal circumstances, it is preferable to not allow the limiting groove to completely penetrate the seal 10. This is because the limiting groove is generally processed by punching. Due to the small size of the limiting groove, punching is difficult. In addition, the seal usually has a wear-resistant PTFE (polytetrafluoroethylene) layer added at the contact point with the valve core. The PTFE layer is relatively tough, which further leads to abnormal phenomena such as punching crooked or leaving burrs during punching, causing the seal 10 to be scrapped due to installation difficulties.

[0109] Therefore, when the seal surrounds the valve core by more than 270°, the degree of bending of the seal becomes difficult to control. The limiting groove is preferably designed to not completely penetrate the seal. Specifically, the seal 10 may include a multi-layered structure in its thickness direction. For example, the seal 10 includes a main body layer and a wear-resistant layer (approximately 1mm thick). The main body layer is made of rubber, and the wear-resistant layer is made of PTFE (polytetrafluoroethylene), which offers better wear resistance. The portion of the seal 10 that contacts the valve core 217 is the wear-resistant layer, reducing the risk of wear on the seal 10 due to wear from the valve core 217. The limiting groove can penetrate part of the seal 10, that is, the main body layer, while retaining at least a portion of the wear-resistant layer, thereby ensuring a reduced probability of wear on the sealing ring by the valve core 217 and extending the service life of the seal 10.

[0110] Of course, in other embodiments, when the seal surrounds the valve core by no more than 270°, the limiting groove may preferably completely penetrate the seal 10.

[0111] Finally, it should be noted that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described in detail here.

[0112] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0113] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0114] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A seal for a control valve, characterized in that, include: A sealing body (110) includes a first edge (111) and a second edge (112) disposed opposite to each other along a first direction; A first limiting structure (120) and a second limiting structure (130) are provided, wherein the first limiting structure (120) is disposed on the first edge (111) and the second limiting structure (130) is disposed on the second edge (112). The first limiting structure (120) and the second limiting structure (130) respectively cooperate with the housing (211) of the control valve to limit the relative rotation of the seal and the housing (211); The first limiting structure (120) includes a plurality of first sub-limiting parts (121), which are spaced apart on the first edge (111); the second limiting structure (130) is located between the projections of two adjacent first sub-limiting parts (121) onto the second edge (112) along the first direction. Alternatively, the second limiting structure (130) includes a plurality of second sub-limiting portions (131), which are spaced apart on the second edge (112); adjacent second sub-limiting portions (131) have a first limiting structure (120) between their projections onto the first edge (111) along the first direction.

2. The seal according to claim 1, characterized in that, The first limiting structure (120) includes a plurality of first sub-limiting parts (121), which are spaced apart on the first edge (111); The second limiting structure (130) includes a plurality of second sub-limiting parts (131), which are spaced apart on the second edge (112); The second sub-limiting portion (131) is located between the projections of the adjacent first sub-limiting portions (121) along the first direction onto the second edge (112).

3. The seal according to claim 1, characterized in that, The first limiting structure (120) includes a plurality of first sub-limiting parts (121), which are spaced apart on the first edge (111); The second limiting structure (130) includes a plurality of second sub-limiting portions (131), and the first sub-limiting portion (121) is located between the projections of adjacent second sub-limiting portions (131) along the first direction on the first edge (111).

4. The seal according to claim 2 or 3, characterized in that, The first sub-limiting portion (121) located at the center of the first edge (111) and the second sub-limiting portion (131) located at the center of the second edge (112) are disposed opposite to each other in a first direction.

5. The seal according to claim 4, characterized in that, The first sub-limiting portion (121) located outside the center of the first edge (111) and the second sub-limiting portion (131) located outside the center of the second edge (112) are not arranged opposite each other in the first direction.

6. The seal according to claim 2 or 3, characterized in that, The plurality of first sub-limiting portions (121) and the plurality of second sub-limiting portions (131) are not arranged opposite each other in the first direction, but are spaced apart in the extension direction of the first edge (111).

7. The seal according to any one of claims 1 to 3, characterized in that, The maximum thickness of the first edge (111) is different from the maximum thickness of the second edge (112).

8. The seal according to claim 2 or 3, characterized in that, A plurality of first sub-limiting portions (121) are arranged at equal intervals on the first edge (111); a plurality of second sub-limiting portions (131) are arranged at equal intervals on the second edge (112); And / or, the number of the first sub-limiting part (121) is between 2 and 5; the number of the second sub-limiting part (131) is between 2 and 5.

9. The seal according to claim 2 or 3, characterized in that, The first sub-limiting part (121) is either a limiting protrusion or a limiting groove; And / or, the second sub-limiting part (131) is either a limiting protrusion or a limiting groove.

10. A control valve, characterized in that, include: The outer shell (211) has a receiving chamber (201), the outer shell (211) including a first mating structure (213) and a second mating structure (214); The valve core (217) is rotatably disposed in the receiving chamber (201); A sealing element (10) is disposed between the valve core (217) and the inner wall of the receiving chamber (201), wherein the sealing element (10) is the sealing element (10) according to any one of claims 1-9; The first mating structure (213) is in a limiting fit with the first limiting structure (120), and the second mating structure (214) is in a limiting fit with the second limiting structure (130).

11. The control valve according to claim 10, characterized in that, The outer casing (211) includes a valve body (2112) and a valve cover (2111), the valve body (2112) and the valve cover (2111) forming the receiving chamber (201); The first mating structure (213) includes a plurality of first sub-matting parts (2131) disposed on the valve cover (2111), and the plurality of first sub-matting parts (2131) are inserted into the first limiting structure (120); The second mating structure (214) includes a plurality of second sub-matting parts (2141) disposed on the bottom plate of the valve body (2112), and the plurality of second sub-matting parts (2141) are inserted into and mated with the second limiting structure (130).

12. The control valve according to claim 11, characterized in that, The seal (10) includes a third edge (113) and a fourth edge (114) disposed opposite each other in the extending direction of the first edge (111), the third edge (113) and the fourth edge (114) having a predetermined distance between them; the predetermined distance forms a notch penetrating the seal (10) in the first direction; The valve cover (2111) is also provided with a third limiting structure (215), which abuts against one end of the third edge (113) and one end of the fourth edge (114); the bottom plate of the valve body (2112) is also provided with a fourth limiting structure (216), which abuts against the other end of the third edge (113) and the other end of the fourth edge (114).

13. The control valve according to claim 12, characterized in that, The third limiting structure (215) includes a limiting rib, the first end of which abuts against one end of the third edge (113), and the second end of which abuts against one end of the fourth edge (114).

14. The control valve according to claim 12, characterized in that, The fourth limiting structure (216) includes two baffles spaced apart on the base plate. One of the two baffles abuts against the other end of the third edge (113), and the other of the two baffles abuts against the other end of the fourth edge (114).

Images