Multi-way valve

Abstract

The utility model provides a multi-way valve which comprises a valve body provided with a first circulation cavity and a plurality of circulation openings, a valve element arranged in the first circulation cavity and an elastic sealing structure, the valve element is rotatably arranged so as to be communicated with different circulation openings, and at least one end of the valve element is provided with a limiting face spaced from the inner wall of the valve body; the elastic sealing structure comprises an annular sealing piece, an annular pressing plate and an elastic piece, the valve element is sleeved with the annular sealing piece and the annular pressing plate, the annular pressing plate is located between the limiting face and the annular sealing piece, and the elastic piece is arranged between the annular sealing piece and the annular pressing plate so that the annular sealing piece and the inner wall of the valve body can be kept sealed. By the adoption of the scheme, through connection of the elastic piece and the valve element is achieved through the annular pressing plate, so that structures such as steps or holes used for installing and limiting the elastic piece can be arranged on the annular pressing plate, thin-wall machining of the valve element is achieved, the weight of the valve element is reduced, and driving force needed when the valve element rotates is reduced.

Description

Technical Field

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

[0002] The seal between the valve core and the inner wall of the valve body of the multi-way valve in the prior art often adopts an elastic sealing structure. However, since the elastic parts of the elastic sealing structure mostly act directly on the valve core, in order to ensure the reliability of the abutment between the valve core and the elastic parts, it is often necessary to process holes or steps and other structures for installing and limiting the elastic parts on the valve core. The thickness of the valve core is difficult to reduce. Even if the holes or steps and other structures are not processed, in order to ensure the abutment area between the valve core and the elastic parts, the thickness of the valve core is also difficult to reduce, which is not conducive to the lightweight design of the multi-way valve and is not conducive to the rotation of the valve core. Utility Model Content

[0003] The utility model provides a multi-way valve to solve the problem that the valve core in the prior art cannot be made thinner.

[0004] In order to solve the above problems, the utility model provides a multi-way valve, including: a valve body, having a first flow chamber and a plurality of flow ports; a valve core, arranged in the first flow chamber, the valve core is rotatably arranged to communicate with different flow ports, at least one end of the valve core has a limiting surface spaced from the inner wall of the valve body; an elastic sealing structure, including an annular seal, an annular pressure plate and an elastic member, the annular seal and the annular pressure plate are both sleeved on the valve core, the annular pressure plate is located between the limiting surface and the annular seal, and the elastic member is arranged between the annular seal and the annular pressure plate so that the annular seal abuts against the inner wall of the valve body.

[0005] Furthermore, the valve core includes a main body section and a transition section arranged at the end of the main body section, the outer diameter of the transition section is smaller than the outer diameter of the main body section, the annular seal and the annular pressure plate are both sleeved on the outer circumference of the transition section, a limiting surface is formed between the transition section and the main body section, and the annular pressure plate abuts against the limiting surface.

[0006] Furthermore, the elastic sealing structure also includes an annular sealing ring, the annular sealing member has an annular sealing groove, the annular sealing ring is arranged in the annular sealing groove and seals with the transition section, or the transition section has an annular sealing groove, the annular sealing ring is arranged in the annular sealing groove and seals with the annular seal.

[0007] Furthermore, the annular pressure plate has a limiting blind hole opening toward the annular sealing member, and one end of the elastic member penetrates into the limiting blind hole and abuts against the bottom wall of the limiting blind hole.

[0008] Furthermore, multiple groups of elastic members and position-limiting blind holes are correspondingly arranged, and the multiple groups of elastic members and position-limiting blind holes are distributed at intervals along the circumference of the annular pressure plate.

[0009] Furthermore, the annular sealing member has an abutment protrusion on one side facing away from the annular pressure plate, and the abutment protrusion abuts against the inner wall of the valve body.

[0010] Further, the multiple flow ports include a first flow port, a second flow port, a third flow port and a fourth flow port, the valve core has a second flow cavity, one end of the second flow cavity is connected with the first flow port, and the other end of the second flow cavity is connected with the second flow port or the third flow port, when the other end of the second flow cavity is connected with the second flow port, the second flow cavity, the first flow port and the second flow port form a first flow channel, the first flow cavity is connected with the third flow port and the fourth flow port to form a second flow channel separated from the first flow channel; when the other end of the second flow cavity is connected with the third flow port, the second flow cavity, the first flow port and the third flow port form a first flow channel, the first flow cavity flows with the second flow port and the fourth flow port to form a second flow channel separated from the first flow channel.

[0011] Furthermore, the end of the valve core and the inner wall of the valve body are spaced apart, the first flow channel is used for circulating low-pressure fluid, and the second flow channel is used for circulating high-pressure fluid.

[0012] Furthermore, the multiple flow ports include a first flow port, a second flow port, a third flow port and a fourth flow port, the valve body includes a main body and a first end cover and a second end cover which are sealed at the upper and lower ends of the main body, the first flow port is arranged on the first end cover, the second flow port and the third flow port are both arranged on the second end cover, the fourth flow port is arranged on the side wall of the main body, and the annular seal is abutted against the second end cover and / or the first end cover.

[0013] Furthermore, two stop blocks are arranged on the second end cover, and the two stop blocks are arranged corresponding to the second flow port and the third flow port respectively. The valve core and the two stop blocks are stop-matched to limit the rotation area of ​​the valve core in the first flow cavity.

[0014] Furthermore, the valve core has a limiting shaft section, the axis of the limiting shaft section coincides with the axis of the first flow port, the second end cover has a mounting blind hole, one end of the limiting shaft section is rotatably disposed in the mounting blind hole and is limitedly matched with the inner wall of the mounting blind hole.

[0015] Furthermore, the multi-way valve also includes a drive assembly and a transmission assembly. The drive assembly is arranged on the valve body and is drivingly connected to the valve core through the transmission assembly to drive the valve core to rotate in the valve body.

[0016] Furthermore, the transmission assembly includes an adapter shaft, a driving wheel sleeved on the adapter shaft, and a driven wheel sleeved on the valve core. The driving wheel and the driven wheel are meshed and are both located in the valve body. The output shaft of the drive assembly is key-connected to the adapter shaft, the driving wheel is key-connected to the adapter shaft, and the driven wheel is key-connected to the valve core.

[0017] By applying the technical solution of the utility model, a multi-way valve is provided, comprising a valve body having a first circulation chamber and a plurality of circulation ports, a valve core arranged in the first circulation chamber, and an elastic sealing structure, wherein the valve core is rotatably arranged to communicate with different circulation ports, and at least one end of the valve core has a limiting surface spaced from the inner wall of the valve body; the elastic sealing structure comprises an annular seal, an annular pressure plate and an elastic member, the annular seal and the annular pressure plate are both sleeved on the valve core, the annular pressure plate is located between the limiting surface and the annular seal, and the elastic member is arranged between the annular seal and the annular pressure plate to keep the annular seal and the inner wall of the valve body sealed.

[0018] By adopting this scheme, the elastic member is transferred and installed by setting an annular pressure plate, which avoids the situation in the prior art that when the elastic member directly acts on the valve core, the valve core needs to be processed with steps or holes according to the abutment position of the elastic member, which leads to the situation that the wall thickness of the valve core cannot be processed thinner. Furthermore, the limiting surface can limit the annular pressure plate to avoid the position of the annular pressure plate on the valve core being unrestricted, so that the limiting effect of the annular pressure plate on the elastic member fails, which leads to the failure of the elastic member to press the annular seal and the failure of the annular seal to seal between the valve body and the valve core. This scheme realizes the transfer of the elastic member and the valve core through the annular pressure plate, so that the steps or holes used to install and limit the elastic member can be set on the annular pressure plate, or the elastic member can directly abut on the annular pressure plate. On the basis of ensuring the elastic effect of the elastic member on the valve core and the seal, the thin wall processing of the valve core is realized, which is conducive to reducing the weight of the valve core and reducing the driving force required for the valve core to rotate. On the other hand, the elastic sealing structure in this scheme is loosely installed, which is conducive to improving the convenience of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of a multi-way valve provided in an embodiment of the utility model is shown;

[0021] Figure 2 Shows Figure 1 A schematic diagram of the structure of the multi-way valve from another perspective;

[0022] Figure 3 Shows Figure 1 A cross-sectional view of a multi-way valve;

[0023] Figure 4 Shows Figure 3 The enlarged view of point Ⅰ in the middle;

[0024] Figure 5 Shows Figure 3 The enlarged view of the middle II;

[0025] Figure 6 Shows Figure 1 A schematic diagram of the structure of a valve core and an elastic sealing structure in a multi-way valve;

[0026] Figure 7 Shows Figure 1 A schematic structural diagram of a first end cover of a valve body in a multi-way valve;

[0027] Figure 8 Shows Figure 1 A schematic structural diagram of a second end cover of a valve body in a multi-way valve;

[0028] Fig. 9 Shows Figure 1 A structural schematic diagram and a cross-sectional view of a transfer shaft in a multi-way valve;

[0029] Fig.10 Shows Figure 1 A schematic diagram of the structure of a driving wheel with an elastic sealing structure in a multi-way valve;

[0030] Fig.11 Shows Figure 1 A schematic diagram of the structure of a driven wheel with an elastic sealing structure in a multi-way valve;

[0031] Fig.12 Shows Figure 1 Schematic diagram of the structure of the main body of the valve body in a multi-way valve.

[0032] The above drawings include the following reference numerals:

[0033] 10. Valve body; 101. First flow cavity; 102. First flow port; 103. Second flow port; 104. Third flow port; 105. Fourth flow port; 106. Avoidance cavity; 107. Bearing cavity; 11. Body; 12. First end cover; 121. First sealing surface; 122. Position limiting hole; 13. Second end cover; 131. Stop block; 132. Mounting blind hole; 133. Second sealing surface;

[0034] 20, valve core; 201, second flow chamber; 202, limit surface; 21, main body section; 22, transition section; 23, limit shaft section; 24, stop ring; 241, matching protrusion;

[0035] 30. Elastic sealing structure; 31. Annular sealing member; 311. Annular sealing groove; 312. Abutting protrusion; 32. Annular pressing plate; 321. Position-limiting blind hole; 33. Elastic member; 34. Annular sealing ring;

[0036] 40. Drive assembly;

[0037] 50. Transmission assembly; 51. Adapter shaft; 511. First keyway; 512. Matching section; 52. Driving wheel; 521. Key-shaped hole; 53. Driven wheel; 531. Second keyway. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] like Figures 1 to 12 As shown, an embodiment of the utility model provides a multi-way valve, including a valve body 10 having a first circulation chamber 101 and a plurality of circulation ports, a valve core 20 arranged in the first circulation chamber 101, and an elastic sealing structure 30, the valve core 20 is rotatably arranged to communicate with different circulation ports, at least one end of the valve core 20 has a limiting surface 202 spaced from the inner wall of the valve body 10; the elastic sealing structure 30 includes an annular seal 31, an annular pressure plate 32 and an elastic member 33, the annular seal 31 and the annular pressure plate 32 are both sleeved on the valve core 20, the annular pressure plate 32 is located between the limiting surface 202 and the annular seal 31, and the elastic member 33 is arranged between the annular seal 31 and the annular pressure plate 32 so that the annular seal 31 abuts against the inner wall of the valve body 10.

[0040] In this embodiment, the annular pressure plate 32 is provided to realize the transfer installation of the elastic member 33, thereby avoiding the situation in the prior art that when the elastic member 33 directly acts on the valve core 20, the valve core 20 needs to be processed with steps or holes or other structures according to the abutment position of the elastic member 33, which leads to the situation that the wall thickness of the valve core 20 cannot be processed to be thinner. Furthermore, the limiting surface 202 can limit the annular pressure plate 32 to avoid the position of the annular pressure plate 32 on the valve core 20 being unrestricted, so that the limiting effect of the annular pressure plate 32 on the elastic member 33 is invalid, thereby causing the elastic member 33 to fail to press on the annular seal 31 and the annular seal 31 to fail to seal between the valve body 10 and the valve core 20. In this embodiment, the elastic member 33 and the valve core 20 are connected by the annular pressing plate 32, so that the structure such as the step or hole for installing and limiting the elastic member 33 can be set on the annular pressing plate 32, or the elastic member 33 can be directly against the annular pressing plate 32, and the thin-wall processing of the valve core 20 is realized on the basis of ensuring the elastic effect of the elastic member 33 on the valve core 20 and the sealing member, which is conducive to reducing the weight of the valve core 20 and reducing the driving force required for the rotation of the valve core 20. On the other hand, the elastic sealing structure 30 in this solution is loosely installed, which is conducive to improving the convenience of disassembly and assembly.

[0041] It should be noted that both ends of the valve core 20 in this embodiment have limiting surfaces spaced from the inner wall of the valve body 10 , and the two limiting surfaces are respectively abutted against two opposite inner walls of the valve body 10 through two elastic sealing structures 30 .

[0042] It can be understood that in other embodiments not shown in the figures, only one end of the valve core 20 has a limiting surface spaced from the inner wall of the valve body 10, and the limiting surface is abutted against the inner wall of the valve body 10 on the corresponding side through an elastic sealing structure 30, and the other end of the valve core 20 is connected to the inner wall of the valve body 10 through other limiting structures.

[0043] Preferably, the material of the annular seal 31 is PTFE, which has excellent high temperature resistance, corrosion resistance, insulation performance and low friction coefficient.

[0044] like Figures 3 to 6 As shown, the valve core 20 includes a main body section 21 and a transition section 22 arranged at the end of the main body section 21, the outer diameter of the transition section 22 is smaller than the outer diameter of the main body section 21, the annular seal 31 and the annular pressure plate 32 are both sleeved on the outer periphery of the transition section 22, a limiting surface 202 is formed between the transition section 22 and the main body section 21, the annular pressure plate 32 abuts against the limiting surface 202, and the sealing position between the end of the transition section 22 and the annular seal 31 on the same side and the inner wall of the valve body 10 is spaced. This arrangement facilitates the molding of the limiting surface 202 and the limiting installation of the annular seal 31 and the annular pressure plate.

[0045] Specifically, the elastic sealing structure 30 also includes an annular sealing ring 34, the annular sealing member 31 has an annular sealing groove 311, the annular sealing ring 34 is arranged in the annular sealing groove 311 and is sealed with the transition section 22, or the transition section 22 has an annular sealing groove 311, the annular sealing ring 34 is arranged in the annular sealing groove 311 and is sealed with the annular sealing member 31. In this way, by sealing the gap between the annular sealing member 31 and the transition section 22, it is avoided that the cavity of the valve body 10 and the cavity of the valve core 20 are connected through the gap between the annular sealing member 31 and the annular pressure plate 32, and the gap between the annular sealing member 31 and the transition section 22, thereby ensuring the sealing effect of the annular sealing member 31 on the valve body 10 and the valve core 20.

[0046] like Figures 4 to 6 As shown, the annular pressing plate 32 has a position-limiting blind hole 321 opening toward the annular sealing member 31, and one end of the elastic member 33 penetrates into the position-limiting blind hole 321 and abuts against the bottom wall of the position-limiting blind hole 321. This arrangement facilitates the position-limiting installation of the elastic member 33 and the processing of the position-limiting blind hole 321, avoids the situation where the elastic member 33 deviates and causes the elastic sealing structure 30 to fail, ensures the installation effect of the annular pressing plate 32 on the elastic member 33, and is conducive to the thin-wall processing of the valve core 20 and realizes the lightweight design of the valve core 20.

[0047] It can be understood that the outer diameter of the annular pressure plate 32 in this embodiment is greater than the outer diameter of the main body section 21 , that is, the thickness of the annular pressure plate 32 in the radial direction of the valve core 20 can be thicker to facilitate the processing of the limiting blind hole 321 .

[0048] Specifically, multiple groups of elastic members 33 and position-limiting blind holes 321 are correspondingly arranged, and the multiple groups of elastic members 33 and position-limiting blind holes 321 are spaced and distributed along the circumference of the annular pressure plate 32. This arrangement improves the pressing effect on the annular sealing member 31 and ensures the reliability of the seal.

[0049] like Figures 3 to 6 As shown, the side of the annular seal 31 facing away from the annular pressure plate 32 has an abutting protrusion 312 , the abutting protrusion 312 is an annular structure, and the abutting protrusion 312 abuts against the inner wall of the valve body 10 .

[0050] In this embodiment, the abutting protrusion 312 abuts against the inner wall of the valve body 10, which is helpful to reduce the contact area between the annular seal 31 and the inner wall of the valve body 10, thereby helping to reduce the friction force that needs to be overcome when driving the valve core 20 to rotate.

[0051] Preferably, the abutting protrusion 312 is a circular ring structure, and the projection shape of the abutting protrusion 312 on the plane where its axis is located is a rectangle, a trapezoid or a triangle. In the case where the abutting protrusion 312 is a trapezoid or a triangle, the width of the abutting protrusion 312 gradually decreases in the direction from the annular pressure plate 32 to the annular seal 31. It can be understood that the cross-sectional shape of the abutting protrusion 312 can be designed according to actual conditions, and is not limited to the rectangle, trapezoid or triangle in this embodiment.

[0052] like Figures 1 to 8 As shown, the multi-way valve in this embodiment is a four-way valve, and the plurality of flow ports include a first flow port 102, a second flow port 103, a third flow port 104 and a fourth flow port 105. The valve core 20 has a second flow cavity 201, one end of the second flow cavity 201 is connected to the first flow port 102, and the other end of the second flow cavity 201 is connected to the second flow port 103 or the third flow port 104. When the other end of the second flow cavity 201 is connected to the second flow port 103, the second flow cavity 201, the first flow port 102 and the second flow port 105 are connected. 3 forms a first flow channel, the first flow chamber 101 is connected with the third flow port 104 and the fourth flow port 105 to form a second flow channel spaced from the first flow channel, and the multi-way valve is in the first flow condition at this time; when the other end of the second flow chamber 201 is connected with the third flow port 104, the second flow chamber 201, the first flow port 102 and the third flow port 104 form a first flow channel, the first flow chamber 101 is connected with the second flow port 103 and the fourth flow port 105 to form a second flow channel spaced from the first flow channel, and the multi-way valve is in the second flow condition at this time. This arrangement facilitates the forming and spacing of the first flow channel and the second flow channel, and at the same time facilitates the conversion of the working conditions of the multi-way valve by rotating the valve core 20, thereby improving the applicability of the multi-way valve.

[0053] The end of the valve core 20 and the inner wall of the valve body 10 are spaced apart, the first flow channel is used for circulating low-pressure fluid, and the second flow channel is used for circulating high-pressure fluid.

[0054] In this embodiment, the end of the valve core 20 is located between the inner wall of the valve body 10 on that side and the limit surface, and the connection between the end of the valve core 20 and the inner wall of the valve body 10 on the corresponding side is realized by the abutting protrusion 312 of the annular seal 31 on that side. It should be noted that the annular seal 31 is located as a whole in the first flow cavity 101, that is, the entirety is mainly located on the high-pressure side, and at the abutting protrusion 312, due to the sealing position interval between the end of the valve core 20 and the annular seal 31 on the same side and the inner wall of the valve body 10, the two sides of the abutting protrusion 312 are respectively the high-pressure side and the low-pressure side. On the low-pressure side, the fluid in the high-pressure side will have a tendency to flow toward the low-pressure side and then press against the annular seal 31. For the annular seal 31 in this embodiment, on both sides along the length direction of the valve body 10, the abutment protrusion 312 is arranged on the side of the annular seal 31 close to the flow port, which has the effect that one side of the abutment protrusion 312 is located on both the high-pressure side and the low-pressure side at the same time, and the other side is completely located on the high-pressure side. Therefore, the pressure difference will generate a force that presses the annular seal 31 against the inner wall of the valve body 10, which is beneficial to improve and ensure the sealing effect of the annular seal 31.

[0055] It should be noted that since the annular seal 31 as a whole will be subjected to a force perpendicular to the abutment protrusion 312 and directed toward the abutment protrusion 312 and the corresponding end cover sealing surface, when the valve core 20 rotates and changes direction, the friction between the annular seal 31 and the inner wall of the valve body 10 is the resistance to rotational reversal. While ensuring the internal leakage and pressure-resistant and wear-resistant life, the area of ​​the sealing abutment between the abutment protrusion 312 and the inner wall of the valve body 10 can be made small to reduce the friction that needs to be overcome when driving the valve core 20 to rotate.

[0056] Specifically, the valve body 10 includes a body 11 and a first end cover 12 and a second end cover 13 which are sealed at the upper and lower ends of the body 11, a first flow port 102 is arranged on the first end cover 12, a second flow port 103 and a third flow port 104 are arranged on the second end cover 13, a fourth flow port 105 is arranged on the side wall of the body 11, and an annular seal 31 abuts against the second end cover 13 and / or the first end cover 12. In this embodiment, two annular seals 31 arranged at both ends of the valve core 20 abut against the second end cover 13 and the first end cover 12 respectively, and such an arrangement facilitates the processing and distribution of multiple flow ports, and is conducive to the sealing effect between the valve core 20 and the valve body 10 during the rotation process. It can be understood that in other embodiments not shown in the figure, in which only one end of the valve core 20 has a limiting surface, the annular seal 31 abuts against the second end cover 13 or the first end cover 12.

[0057] It can be understood that the valve core 20 is rotatably arranged in the valve body 10 through a bearing, the first end cover 12 has a stage for installing a bearing, the valve core 20 has a first sealing surface 121 that is sealed against the annular seal 31, the first sealing surface 121 is located on the stage connected to the first flow port 102, and the side of the second end cover 13 facing the first flow cavity 101 is a second sealing surface 133, and the annular seal 31 on this side is sealed against the second sealing surface 133.

[0058] like Figure 7 As shown, two stop blocks 131 are provided on the second end cover 13, and the two stop blocks 131 are respectively provided corresponding to the second flow port 103 and the third flow port 104, and the valve core 20 and the two stop blocks 131 are both stopped and matched to limit the rotation area of ​​the valve core 20 in the first flow cavity 101. This arrangement is convenient for limiting the rotation of the valve core 20, and avoids the situation that the valve core 20 rotates too much, resulting in misalignment between the second flow cavity 201 and the flow port, and internal leakage is easy to occur.

[0059] like Figure 3 and Figure 6 As shown, the valve core 20 has a limiting shaft section 23, the axis of the limiting shaft section 23 coincides with the axis of the first flow port 102, the second end cover 13 has a mounting blind hole 132, one end of the limiting shaft section 23 is rotatably disposed in the mounting blind hole 132 and is limitedly matched with the inner wall of the mounting blind hole 132. This arrangement is conducive to the installation and rotation limit of the valve core 20, and ensures the reliability and stability of the rotation of the valve core 20.

[0060] like Figures 1 to 3 As shown, the multi-way valve further includes a drive assembly 40 and a transmission assembly 50. The drive assembly 40 is disposed on the valve body 10 and is drivingly connected to the valve core 20 through the transmission assembly 50 to drive the valve core 20 to rotate in the valve body 10. This arrangement avoids the situation where the drive assembly 40 is directly drivingly connected to the valve core 20, which requires a large driving force or is difficult to ensure stable and reliable installation of the two, and is conducive to stable driving of the valve core 20.

[0061] like Figures 1 to 3 as well as Figures 9 to 12 As shown, the transmission assembly 50 includes an adapter shaft 51, a driving wheel 52 sleeved on the adapter shaft 51, and a driven wheel 53 sleeved on the valve core 20, the driving wheel 52 and the driven wheel 53 are meshed and are both located in the valve body 10, the output shaft of the drive assembly 40 is key-connected with the adapter shaft 51, the driving wheel 52 and the adapter shaft 51 are key-connected, and the driven wheel 53 and the valve core 20 are key-connected.

[0062] In this embodiment, the end of the adapter shaft 51 has a first keyway 511, the drive assembly 40 includes a drive motor, the end section of the output shaft of the drive motor is a key-shaped section adapted to the first keyway 511, and the adapter shaft 51 is key-connected with the output shaft of the drive motor. The center of the driving wheel 52 has a key-shaped hole 521, the other end section of the adapter shaft 51 is a matching section 512 adapted to the key-shaped hole 521, and the adapter shaft 51 is key-connected with the driving wheel 52. The inner ring edge of the driven wheel 53 has at least two second keyways 531, and the outer periphery of the valve core 20 has a stop ring 24 for supporting the driven wheel 53, and the stop ring 24 has a plurality of matching protrusions 241 adapted to the second keyways 531, and the plurality of matching protrusions 241 are arranged in a one-to-one correspondence in the plurality of second keyways 531 to realize the key connection between the driven wheel 53 and the valve core 20. This arrangement facilitates the transmission connection between the transmission assembly 50 and the valve core 20, and ensures the reliability of the transmission.

[0063] Among them, the first end cover 12 has a limiting hole 122 for passing the adapter shaft 51, and the valve body 10 also has an avoidance chamber 106, which is located on one side of the first flow chamber 101 and is used to accommodate and place the adapter shaft 51, the driving wheel 52 and part of the driven wheel 53. The bottom of the avoidance chamber 106 has a bearing chamber 107, and the bearing chamber 107 is used to accommodate a bearing rotatably connected to the adapter shaft 51.

[0064] Preferably, the driven wheel 53 has a plurality of weight-reducing holes.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-way valve, characterized in that: include: A valve body (10) having a first flow chamber (101) and a plurality of flow ports; A valve core (20) is arranged in the first circulation chamber (101), the valve core (20) is rotatably arranged to communicate with different circulation ports, and at least one end of the valve core (20) has a limiting surface (202) spaced from the inner wall of the valve body (10); The elastic sealing structure (30) comprises an annular sealing member (31), an annular pressure plate (32) and an elastic member (33); the annular sealing member (31) and the annular pressure plate (32) are both sleeved on the valve core (20); the annular pressure plate (32) is located between the limiting surface (202) and the annular sealing member (31); and the elastic member (33) is arranged between the annular sealing member (31) and the annular pressure plate (32) so that the annular sealing member (31) abuts against the inner wall of the valve body (10).

2. The multi-way valve according to claim 1, characterized in that: The valve core (20) comprises a main body section (21) and a transition section (22) arranged at the end of the main body section (21); the outer diameter of the transition section (22) is smaller than the outer diameter of the main body section (21); the annular seal (31) and the annular pressure plate (32) are both sleeved on the outer circumference of the transition section (22); the limiting surface (202) is formed between the transition section (22) and the main body section (21); and the annular pressure plate (32) abuts against the limiting surface (202).

3. The multi-way valve according to claim 2, characterized in that: The elastic sealing structure (30) further comprises an annular sealing ring (34), the annular sealing member (31) having an annular sealing groove (311), the annular sealing ring (34) being arranged in the annular sealing groove (311) and being sealingly matched with the transition section (22), or the transition section (22) having an annular sealing groove (311), the annular sealing ring (34) being arranged in the annular sealing groove (311) and being sealingly matched with the annular sealing member (31).

4. The multi-way valve according to claim 1, characterized in that: The annular pressure plate (32) has a limiting blind hole (321) opening toward the annular sealing member (31), and one end of the elastic member (33) penetrates into the limiting blind hole (321) and abuts against the bottom wall of the limiting blind hole (321).

5. The multi-way valve according to claim 4, characterized in that: The elastic members (33) and the position-limiting blind holes (321) are provided in a plurality of groups corresponding to each other, and the plurality of groups of the elastic members (33) and the position-limiting blind holes (321) are distributed at intervals along the circumference of the annular pressure plate (32).

6. The multi-way valve according to claim 1, characterized in that: The annular sealing member (31) has an abutment protrusion (312) on the side facing away from the annular pressure plate (32), and the abutment protrusion (312) abuts against the inner wall of the valve body (10).

7. The multi-way valve according to claim 1, characterized in that: The plurality of flow ports include a first flow port (102), a second flow port (103), a third flow port (104) and a fourth flow port (105); the valve core (20) has a second flow chamber (201); one end of the second flow chamber (201) is connected to the first flow port (102); the other end of the second flow chamber (201) is connected to the second flow port (103) or the third flow port (104); when the other end of the second flow chamber (201) is connected to the second flow port (103), the second flow chamber (201), the first flow port (102) and the fourth flow port (105) are connected. The second flow port (103) forms a first flow channel, and the first flow cavity (101) is connected with the third flow port (104) and the fourth flow port (105) to form a second flow channel separated from the first flow channel; when the other end of the second flow cavity (201) is connected with the third flow port (104), the second flow cavity (201), the first flow port (102) and the third flow port (104) form a first flow channel, and the first flow cavity (101) is in communication with the second flow port (103) and the fourth flow port (105) to form a second flow channel separated from the first flow channel.

8. The multi-way valve according to claim 7, characterized in that: The end of the valve core (20) and the inner wall of the valve body (10) are arranged at a distance, the first flow channel is used for circulating low-pressure fluid, and the second flow channel is used for circulating high-pressure fluid.

9. The multi-way valve according to claim 1, characterized in that: The plurality of flow openings include a first flow opening (102), a second flow opening (103), a third flow opening (104) and a fourth flow opening (105); the valve body (10) includes a main body (11) and a first end cover (12) and a second end cover (13) which are sealingly arranged at the upper and lower ends of the main body (11); the first flow opening (102) is arranged on the first end cover (12); the second flow opening (103) and the third flow opening (104) are both arranged on the second end cover (13); the fourth flow opening (105) is arranged on the side wall of the main body (11); and the annular seal (31) abuts against the second end cover (13) and / or the first end cover (12).

10. The multi-way valve according to claim 9, characterized in that: Two stop blocks (131) are arranged on the second end cover (13), and the two stop blocks (131) are arranged corresponding to the second circulation port (103) and the third circulation port (104) respectively. The valve core (20) and the two stop blocks (131) are both stopped and matched to limit the rotation area of ​​the valve core (20) in the first circulation chamber (101).

11. The multi-way valve according to claim 10, characterized in that: The valve core (20) has a limiting shaft section (23), the axis of which coincides with the axis of the first flow port (102), and the second end cover (13) has a mounting blind hole (132), one end of which is rotatably disposed in the mounting blind hole (132) and is limitedly matched with the inner wall of the mounting blind hole (132).

12. The multi-way valve according to claim 1, characterized in that: The multi-way valve further comprises a drive assembly (40) and a transmission assembly (50); the drive assembly (40) is arranged on the valve body (10) and is drivingly connected to the valve core (20) via the transmission assembly (50) so as to drive the valve core (20) to rotate within the valve body (10).

13. The multi-way valve according to claim 12, characterized in that: The transmission assembly (50) comprises a transfer shaft (51), a driving wheel (52) sleeved on the transfer shaft (51), and a driven wheel (53) sleeved on the valve core (20); the driving wheel (52) and the driven wheel (53) are meshed and both are located in the valve body (10); the output shaft of the drive assembly (40) is key-connected to the transfer shaft (51); the driving wheel (52) and the transfer shaft (51) are key-connected; and the driven wheel (53) and the valve core (20) are key-connected.

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