Control valve

Abstract

The utility model discloses a control valve which comprises a valve seat assembly, a valve rod assembly and a valve rod assembly. The valve element is movably arranged in the through hole in a penetrating mode in the axial direction of the valve seat assembly; the driving assembly comprises a rotating shaft, part of the rotating shaft is arranged in the through hole in a penetrating mode, and the rotating shaft is connected with the valve element and used for driving the valve element to move in the axial direction of the valve seat assembly; and the guide piece is arranged outside the rotating shaft in a sleeving mode and located on the side, away from the valve element, of the valve seat assembly, and the guide piece and the valve seat assembly are integrated. According to the control valve, the compact structure can be ensured, the number of parts and assembly procedures are reduced, and the production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant control element technology, and more specifically, to a control valve. Background Technology

[0002] In related technologies, control valves have a large number of internal parts that are scattered, making assembly complex, involving many processes, and affecting assembly efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a control valve that ensures a compact structure, reduces the number of parts and assembly steps, and thus improves production efficiency.

[0004] A control valve according to an embodiment of the present invention includes: a valve seat assembly having a through hole extending along the axial direction of the valve seat assembly; a valve core movably disposed within the through hole along the axial direction of the valve seat assembly; a drive assembly including a rotating shaft, a portion of which is disposed within the through hole, the rotating shaft being connected to the valve core for driving the valve core to move along the axial direction of the valve seat assembly; and a guide member sleeved outside the rotating shaft and located on the side of the valve seat assembly away from the valve core, the guide member being integral with the valve seat assembly.

[0005] According to the control valve of this utility model embodiment, a portion of the rotating shaft of the drive assembly passes through the through hole of the valve seat assembly. The guide is sleeved outside the rotating shaft and located on the side of the valve seat assembly away from the valve core. The guide can provide support and guidance for the rotating shaft, which eliminates the need for the guide bracket set at the end of the rotating shaft away from the valve seat assembly in related technologies. Moreover, the guide and the valve seat assembly are an integral part with high connection strength, which can ensure a compact structure, reduce the number of parts, thereby reducing assembly steps and improving production efficiency.

[0006] In addition, the control valve according to the above embodiments of the present invention may also have the following additional technical features:

[0007] According to some embodiments of the present invention, the control valve assembly includes an upper valve seat and a lower valve seat, the upper valve seat and the lower valve seat are arranged and connected along the axial direction of the rotation shaft, the through hole passes through the upper valve seat and the lower valve seat, and the guide member is located on the side of the upper valve seat away from the lower valve seat and is integral with the upper valve seat.

[0008] According to some embodiments of the present invention, the upper valve seat is provided with a second mounting groove, the second mounting groove is connected to and coaxial with the through hole, and a bearing is provided between the second mounting groove and the outer peripheral wall of the rotating shaft.

[0009] According to some embodiments of the present invention, a stop is provided on the side of the bearing away from the guide member, and when the valve core moves along the axial direction of the valve seat assembly, the valve core is adapted to abut against the end face of the stop member away from the bearing.

[0010] According to some embodiments of the present invention, the end of the through hole away from the rotating shaft is formed as a first communication port, the peripheral wall of the lower valve seat is provided with a second communication port communicating with the through hole, the hole wall of the through hole is provided with an annular protrusion, the protrusion is located on the side of the second communication port close to the first communication port, and the outer peripheral wall of the valve core is adapted to abut against the protrusion.

[0011] According to some embodiments of the present invention, the end of the valve core away from the rotation axis has an inclined section, and the cross-sectional area of ​​the inclined section gradually decreases in the direction from the upper valve seat to the lower valve seat.

[0012] According to some embodiments of the present invention, the rotating shaft and the valve core are threadedly connected, and the control valve further includes: a limiting member, the limiting member being located in the through hole, the valve core passing through the limiting member, one of the limiting member and the valve core having a limiting groove, and the other having a limiting protrusion cooperating with the limiting groove.

[0013] According to some embodiments of the present invention, one of the rotating shaft and the valve core is provided with a threaded portion, and the other is provided with a threaded hole that mates with the threaded portion.

[0014] According to some embodiments of the present invention, the drive assembly further includes: a rotor, the rotor being sleeved on the rotating shaft, the end of the rotor facing the valve core having a clearance space, and the end of the guide member away from the valve core passing through the clearance space.

[0015] According to some embodiments of the present invention, the rotor is provided with a first mating part, and the rotating shaft is provided with a second mating part that mates with the first mating part. The second mating part is formed as a connecting hole extending radially along the rotating shaft. The first mating part includes: an extension part located radially inner to the rotor and connected to the radially inner side of the rotor and the outer peripheral wall of the rotating shaft; and a connecting part passing through the connecting hole, with both ends of the connecting part in the length direction connected to the extension part. Along the axial direction of the rotating shaft, both ends of the connecting part are recessed within the two end faces in the thickness direction of the extension part.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a cross-sectional view of a control valve according to some embodiments of the present invention;

[0019] Figure 2 yes Figure 1 The center circle shows an enlarged structural diagram at point A.

[0020] Figure 3 yes Figure 1 The enlarged structural diagram at point B is shown in the middle circle.

[0021] Figure 4 This is a schematic diagram of the upper valve seat of the control valve according to an embodiment of the present utility model;

[0022] Figure 5 This is a cross-sectional view of the upper valve seat of the control valve according to an embodiment of the present utility model;

[0023] Figure 6 This is a structural schematic diagram of the guide component of the control valve according to an embodiment of the present utility model;

[0024] Figure 7 This is a cross-sectional view of the guide member of the control valve according to an embodiment of the present utility model;

[0025] Figure 8 This is a cross-sectional view of the valve core of a control valve according to some embodiments of the present invention at one angle.

[0026] Figure 9 This is a schematic diagram of the structure of the rotating shaft and rotor of the control valve according to some embodiments of the present invention;

[0027] Figure 10 This is a cross-sectional view of the rotation shaft and rotor of the control valve according to some embodiments of the present invention at an angle.

[0028] Figure 11 This is a cross-sectional view of the control valve's rotating shaft and rotor assembly from another angle, according to some embodiments of the present invention.

[0029] Figure 12 This is a cross-sectional view of a control valve according to other embodiments of the present invention;

[0030] Figure 13 This is a schematic diagram of the structure of the rotating shaft and rotor of the control valve according to other embodiments of the present invention;

[0031] Figure 14 This is a cross-sectional view of the valve core of a control valve according to other embodiments of the present invention at one angle.

[0032] Figure label:

[0033] 100. Control valve;

[0034] 10. Valve seat assembly; 11. Through hole; 12. Upper valve seat; 13. Lower valve seat; 14. Sleeve; 111. First connecting port; 112. Second connecting port; 113. Protrusion; 121. First mounting groove; 122. Second mounting groove;

[0035] 20. Valve core; 21. Inclined section; 22. Limiting protrusion; 23. Threaded hole;

[0036] 30. Drive assembly; 31. Rotating shaft; 32. Rotor; 33. Motor; 311. Second mating part; 312. Threaded part; 321. First mating part;

[0037] 40. Guide components;

[0038] 51. Bearing; 52. Stopping component;

[0039] 60. Limiting component; 61. Limiting groove;

[0040] 71. Extension; 72. Connecting part;

[0041] 81. Connecting parts; 82. Valve block;

[0042] 91. Sealing assembly; 92. First seal; 93. Second seal; 94. Third seal; 911. Sealing ring; 912. Sealing ring. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] In the description of this utility model, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "first feature above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0046] The control valve 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0047] Reference Figures 1-3 , Figure 12 As shown, the control valve 100 according to an embodiment of the present utility model may include: a valve seat assembly 10, a valve core 20, and a drive assembly 30.

[0048] Specifically, the valve seat assembly 10 has a through hole 11, which is along the axial direction of the valve seat assembly 10 (e.g., Figure 1 Extending in the vertical direction shown, the valve core 20 is movably inserted into the through hole 11 along the axial direction of the valve seat assembly 10. The drive assembly 30 includes a rotating shaft 31, a portion of which is inserted into the through hole 11, and the rotating shaft 31 is connected to the valve core 20. Thus, when the rotating shaft 31 rotates, it can drive the valve core 20 to move along the axial direction of the valve seat assembly 10, thereby fulfilling the control requirements of the control valve 100.

[0049] In addition, such as Figure 1 , Figure 2 and Figure 12 As shown, the control valve 100 also includes a guide 40, which is sleeved outside the rotating shaft 31 and located on the side of the valve seat assembly 10 away from the valve core 20 (e.g., Figure 1 As shown on the upper side), the guide member 40 can provide support and guidance for the rotating shaft 31, ensuring that the rotating shaft 31 remains stable during rotation, ensuring the coaxiality of the rotating shaft 31, preventing the rotating shaft 31 from shifting or shaking, and eliminating the need for the guide bracket set at the end of the rotating shaft away from the valve seat assembly in related technologies, ensuring a compact structure.

[0050] Meanwhile, the guide component 40 and the valve seat assembly 10 are integrated, which is simple to manufacture, has high connection strength, can further ensure a compact structure, reduce the number of parts, and facilitate the reduction of assembly steps, which is conducive to improving production efficiency.

[0051] It should be noted that, for ease of description, the directions such as "up" and "down" in this utility model are based on the orientation relationships shown in the accompanying drawings, and are not a limitation on the orientation in actual application.

[0052] In some embodiments, the control valve 100 may be an expansion valve, capable of controlling the flow rate of the medium to meet the required usage requirements. For example, the expansion valve may be an electronic expansion valve.

[0053] According to the embodiment of the present invention, the control valve 100 has a portion of the rotating shaft 31 of the drive assembly 30 passing through the through hole 11 of the valve seat assembly 10. The guide member 40 is sleeved outside the rotating shaft 31 and located on the side of the valve seat assembly 10 away from the valve core 20. The guide member 40 can provide support and guidance for the rotating shaft 31, which eliminates the need for the guide bracket set at the end of the rotating shaft away from the valve seat assembly in related technologies. Moreover, the guide member 40 and the valve seat assembly 10 are an integral part with high connection strength, which can ensure a compact structure, reduce the number of parts, thereby reducing assembly steps and improving production efficiency.

[0054] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 12 As shown, the valve seat assembly 10 includes an upper valve seat 12 and a lower valve seat 13. The upper valve seat 12 and the lower valve seat 13 are arranged along the axial direction of the rotating shaft 31 and are connected. The through hole 11 passes through the upper valve seat 12 and the lower valve seat 13, which facilitates the assembly of the internal structure of the control valve 100 (such as the valve core 20) into the valve seat assembly 10, which is beneficial to improving assembly efficiency and facilitating the processing and manufacturing of the valve seat assembly 10, thus reducing structural complexity.

[0055] In addition, such as Figure 4 and Figure 5As shown, the guide 40 is located on the side of the upper valve seat 12 away from the lower valve seat 13 (e.g., Figure 1 As shown in the upper side, the guide member 40 guides the movement of the rotating shaft 31. The guide member 40 and the upper valve seat 12 are an integral part, which can further reduce the structural complexity of the valve seat assembly 10 and facilitate the processing and manufacturing of the guide member 40 and the upper valve seat 12.

[0056] According to some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 Figure 12 As shown, the end of the upper valve seat 12 facing the lower valve seat 13 (e.g.) Figure 1 The lower end shown in the diagram is provided with a first mounting groove 121, which communicates with the through hole 11. The end of the lower valve seat 13 facing the upper valve seat 12 (e.g.) Figure 1 The upper end shown extends into the first mounting groove 121, which enables the assembly and positioning of the upper valve seat 12 and the lower valve seat 13. This facilitates the connection of the end of the lower valve seat 13 facing the upper valve seat 12 with the upper valve seat 12, ensuring a reliable connection between the upper valve seat 12 and the lower valve seat 13. This improves assembly efficiency and ensures the position accuracy of the through hole 11, thereby ensuring the smooth operation of the valve core 20 and reducing the wobble of the valve core 20.

[0057] In some embodiments, after the end of the lower valve seat 13 facing the upper valve seat 12 is press-fitted with the first mounting groove 121, the lower valve seat 13 and the upper valve seat 12 are welded together, for example by laser welding, to ensure that the connection between the lower valve seat 13 and the upper valve seat 12 is reliable and the production cost is low.

[0058] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 5 and Figure 12 As shown, the upper valve seat 12 is provided with a second mounting groove 122, which is connected to and coaxial with the through hole 11. A bearing 51 is provided between the second mounting groove 122 and the outer peripheral wall of the rotating shaft 31. The bearing 51 supports the rotating shaft 31 while ensuring the normal rotation of the rotating shaft 31, reducing frictional resistance and improving the rotational flexibility of the rotating shaft 31.

[0059] Therefore, the upper valve seat 12 can simultaneously provide a guide 40 for guiding the rotating shaft 31 and a second mounting groove 122 for fixing the bearing 51, which better ensures the guiding position of the rotating shaft 31 and the installation position of the bearing 51. This avoids the problem in related technologies where the fixing part for fixing the bearing and the guide part for guiding the rotating shaft are made separately and cannot guarantee coaxiality. It can ensure that the rotating shaft 31 and the valve core 20 run more smoothly, which helps to reduce the wobble of the valve core 20 and ensure the working reliability of the control valve 100.

[0060] In some embodiments, the inner ring of the bearing 51 is interference-fitted with the rotating shaft 31, which ensures that the bearing 51 is reliably fixed on the rotating shaft 31, and the outer ring of the bearing 51 is clearance-fitted with the groove wall of the second mounting groove 122, so that the bearing 51 still maintains a certain clearance, avoiding problems such as excessive force between the inner ring and the outer ring of the bearing 51, which can easily cause damage, and thus helps to extend the service life of the bearing 51.

[0061] According to some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 12 As shown, the side of bearing 51 away from guide 40 (e.g.) Figure 1 The lower side shown is provided with a stop 52. When the valve core 20 moves along the axial direction of the valve seat assembly 10, the valve core 20 can abut against the end face of the stop 52 away from the bearing 51, so that the stop 52 can limit the valve core 20, avoid the valve core 20 from falling out, and ensure that the valve core 20 assembly moves reliably, thereby ensuring that the control valve 100 works reliably.

[0062] In some embodiments, the stop member 52 is interference-fitted with the upper valve seat 12 to ensure that the stop member 52 is reliably fixed on the upper valve seat 12 and to prevent the stop member 52 from moving on the upper valve seat 12, thereby ensuring that the stop member 52 reliably limits the valve core 20.

[0063] In some embodiments, such as Figure 2 As shown, the stop 52 abuts against the outer ring of the bearing 51, so that the stop 52 can prevent the outer ring of the bearing 51 from moving away from the guide 40, ensuring reliable positioning of the bearing 51 and preventing axial movement of the bearing 51.

[0064] According to some embodiments of this utility model, such as Figure 1 , Figure 3 and Figure 12 As shown, the end of the through hole 11 away from the rotation axis 31 (e.g.) Figure 1The lower end shown is formed as a first communication port 111, and a second communication port 112 is provided on the peripheral wall of the lower valve seat 13. The second communication port 112 is connected to the through hole 11, so that the first communication port 111 can be connected to the second communication port 112 through the through hole 11, which facilitates the flow of the medium (e.g., carbon dioxide refrigerant) between the first communication port 111 and the second communication port 112 to meet the required flow requirements.

[0065] In addition, such as Figure 1 , Figure 3 and Figure 12 As shown, an annular protrusion 113 is provided on the wall of the through hole 11. The protrusion 113 is located on the side of the second connecting port 112 closer to the first connecting port 111 (e.g., Figure 1 As shown in the lower part of the diagram, the outer peripheral wall of the valve core 20 can abut against the protrusion 113, thereby disconnecting the first connecting port 111 and the second connecting port 112, thus sealing the valve core 20 with the through hole 11. When the outer peripheral wall of the valve core 20 does not abut against the protrusion 113, the first connecting port 111 and the second connecting port 112 are connected, thus meeting the control requirements of the control valve 100.

[0066] In some embodiments, such as Figure 1 , Figure 3 and Figure 12 As shown, there can be multiple (two or more) second communication ports 112. Multiple second communication ports 112 are spaced apart along the circumferential direction of the lower valve seat 13. Multiple second communication ports 112 can increase the flow rate of the medium and improve the flow velocity of the medium to achieve the flow requirements of the control valve 100.

[0067] In some embodiments of this utility model, such as Figure 1 , Figure 8 , Figure 12 and Figure 14 As shown, the end of the valve core 20 furthest from the rotation shaft 31 (e.g.) Figure 3 The lower end shown has an inclined section 21 in the direction from the upper valve seat 12 to the lower valve seat 13 (e.g., Figure 1 Along the direction from top to bottom, the cross-sectional area of ​​the inclined section 21 gradually decreases. When the inclined section 21 cooperates with the protrusion 113, it can stop the valve core 20, thereby closing the control valve 100. It can also more accurately determine the closing position and actual operating position of the control valve 100, making it easier to determine the position of the valve core 20 and making the control valve 100 more precise.

[0068] In some embodiments where the valve core 20 can abut against the end face of the stop member 52 away from the bearing 51, when the valve core 20 moves along the axial direction of the valve seat assembly 10, the stop member 52 and the protrusion 113 can limit the valve core 20 in two positions, which can more accurately determine the valve closing position and the actual operating position of the control valve 100, making it easier to determine and control the position of the valve core 20, and making the control of the control valve 100 more precise.

[0069] In some embodiments, such as Figure 1 , Figure 2 and Figure 12 As shown, a sealing assembly 91 is provided between the lower valve body and the valve core 20. The sealing assembly 91 is located on the side of the second communication port 112 away from the first communication port 111 (e.g., Figure 1 As shown in the upper part, the sealing assembly 91 can achieve a seal between the lower valve body and the valve core 20, preventing the medium from passing through the gap between the lower valve body and the valve core 20 assembly, thus ensuring a reliable seal.

[0070] In some embodiments, such as Figure 2 As shown, the sealing assembly 91 includes a sealing ring 911 and a sealing ring 912. The sealing ring 912 is located on the outer side of the sealing ring 911, and the valve core 20 passes through the inner side of the sealing ring 911. The sealing ring 911 and the sealing ring 912 ensure a reliable seal between the lower valve body and the valve core 20, and the structure is simple and easy to manufacture. For example, the sealing ring 911 can be a polytetrafluoroethylene (PTFE) ring, and the sealing ring 912 can be an O-ring, etc.

[0071] In some embodiments, such as Figure 1 and Figure 12 As shown, the control valve 100 includes a sleeve 14, which is sleeved on the end of the upper valve seat 12 away from the lower valve seat 13 (e.g., Figure 1 As shown in the upper part, the rotor 32 and the rotating shaft 31 are located inside the sleeve 14. The sleeve 14 can provide a seal for the control valve 100 to ensure reliable sealing. The sleeve 14 can also protect the rotor 32 and the rotating shaft 31, preventing them from being exposed and damaged, and extending the service life of the control valve 100.

[0072] In some embodiments, the sleeve 14 is interference-fitted or clearance-fitted with the upper valve seat 12, which enables the sleeve 14 to be sleeved on the upper valve seat 12, ensuring that the sleeve 14 is reliably fixed on the upper valve seat 12.

[0073] In some embodiments, the sleeve 14 and the upper valve seat 12 are connected by welding to ensure a reliable connection between the sleeve 14 and the upper valve seat 12 and to reduce production costs.

[0074] According to some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12 As shown, the rotating shaft 31 and the valve core 20 are threadedly connected. The control valve 100 also includes a limiting member 60, which is located inside the through hole 11. The valve core 20 passes through the limiting member 60. The limiting member 60 has a limiting groove 61, and the valve core 20 has a limiting protrusion 22. When the rotating shaft 31 rotates, the limiting protrusion 22 cooperates with the limiting groove 61 to prevent the valve core 20 from rotating, thus enabling the valve core 20 to move along the axial direction of the rotating shaft 31, ensuring reliable movement and meeting the control requirements of the control valve 100. Simultaneously, by independently setting the limiting member 60 on the valve seat assembly 10, the structure of the valve seat assembly 10 and the limiting member 60 is simplified, reducing structural complexity. This avoids the increased processing complexity and cost caused by directly machining the anti-rotation structure of the valve core onto the valve seat assembly in related technologies, facilitating manufacturing and reducing production costs.

[0075] In some embodiments, such as Figure 1 , Figure 2 , Figures 6-8 , Figure 14 As shown, there are multiple limiting protrusions 22, which are spaced apart along the circumferential direction of the valve core 20. There are multiple limiting grooves 61 that correspond one-to-one with the multiple limiting protrusions 22. By cooperating with the multiple limiting protrusions 22 and the multiple limiting grooves 61, the reliable movement of the valve core 20 can be further ensured, and problems such as valve core 20 displacement can be avoided.

[0076] In embodiments of this utility model, the number of limiting protrusions 22 can be flexibly set according to actual conditions. For example, the limiting protrusions 22 can be as follows: Figure 8 The number shown is two, but it can also be three, four, five, six or more, all of which are within the protection scope of this utility model.

[0077] Of course, the valve core 20 may be provided with a limiting groove 61, and the limiting member 60 may be provided with a limiting protrusion 22 that cooperates with the limiting groove 61 and the limiting member 60, which is also within the protection scope of this utility model.

[0078] In some embodiments, the limiting member 60 is interference-fitted with the valve seat assembly 10 to ensure that the limiting member 60 is reliably fixed on the valve seat assembly 10 and to prevent movement, thereby ensuring reliable anti-rotation of the valve core 20.

[0079] In some embodiments where a stop 52 is provided on the side of bearing 51 away from guide member 40, a limiting member 60 is provided on the lower valve seat 13 and is interference-fitted with the lower valve seat 13, with the end of the limiting member 60 facing the stop 52 (e.g.) Figure 2The upper end shown in the figure is fitted with the stop 52, so that the stop 52 can provide an assembly limiting function for the limiting member 60, and the end of the limiting member 60 away from the stop 52 (e.g., Figure 2 The lower end shown in the figure is in contact with the lower valve seat 13 to ensure that the limiting member 60 is reliably fixed on the valve seat assembly 10 and to prevent the limiting member 60 from shifting.

[0080] According to some embodiments of this utility model, such as Figure 1 , Figure 2 , Figures 8-11 As shown, the valve core 20 is provided with a threaded part 312, and the rotating shaft 31 is provided with a threaded hole 23. By cooperating with the threaded part 312, the rotating shaft 31 and the valve core 20 can be threadedly connected, which meets the required connection requirements and facilitates the conversion of the rotation of the rotating shaft 31 into the axial movement of the valve core 20 along the valve seat assembly 10, ensuring the reliable movement of the valve core 20.

[0081] Of course, such as Figures 12-14 As shown, the threaded portion 312 can be provided on the rotating shaft 31. Specifically, the rotating shaft 31 is provided with the threaded portion 312, and the valve core 20 is provided with a threaded hole 23 that mates with the threaded portion 312. This is also within the protection scope of this utility model.

[0082] In some embodiments of this utility model, such as Figure 1 , Figures 9-11 , Figure 13 As shown, the drive assembly 30 also includes a rotor 32, which is sleeved on the rotating shaft 31. The end of the rotor 32 facing the valve core 20 (e.g.) Figure 1 The lower end shown has a clearance space. The end of the guide 40 away from the valve core 20 passes through the clearance space, so that part of the guide 40 can be located in the clearance space. While guiding the rotating shaft 31, the internal space of the rotor 32 can be fully utilized, ensuring a compact structure, reducing the space occupied, and facilitating the miniaturization of the control valve 100.

[0083] According to some embodiments of this utility model, such as Figure 1 , Figures 9-11 , Figure 13 As shown, the rotor 32 and the rotating shaft 31 are integrated into one piece, which is simple to manufacture, ensures high connection strength, and enables more precise control of the concentricity and position of the rotor 32 and the rotating shaft 31. This avoids problems such as thermal deformation caused by welding connections, and reduces assembly processes and time. Assembly is simple and conducive to improving production efficiency.

[0084] In some embodiments, the rotor 32 and the rotating shaft 31 are integrally injection molded, which can ensure a tight connection between the rotor 32 and the rotating shaft 31, improve the structural strength and stability of the rotor 32 and the rotating shaft 31, improve production efficiency, and realize complex shape structures to meet the required design requirements.

[0085] In some embodiments, such as Figures 9-11 , Figure 13 As shown, the rotor 32 is provided with a first mating part 321, and the rotating shaft 31 is provided with a second mating part 311. Thus, the second mating part 311 engages with the first mating part 321, restricting the relative rotation of the rotor 32 and the rotating shaft 31, preventing slippage at the connection point, and thus preventing relative rotation caused by slippage. This ensures a reliable connection between the rotating shaft 31 and the rotor 32, prevents the rotor 32 from jumping relative to the rotating shaft 31, and ensures the accuracy and stability of the motion. Simultaneously, it avoids the material waste caused by increasing material usage to overcome the relative rotation of the rotor and rotating shaft in related technologies, reducing the weight of the rotating shaft 31 and the rotor 32, which is beneficial for achieving lightweight design.

[0086] In embodiments of this utility model, the specific structures of the first mating part 321 and the second mating part 311 can be configured according to actual conditions. For example, the second mating part 311 can be formed as knurling, threads, etc., on the outer peripheral wall of the rotating shaft 31.

[0087] For example, in some embodiments, such as Figure 10 and Figure 11 As shown, the second mating part 311 is formed as a connecting hole extending radially along the rotating shaft 31, and the first mating part 321 passes through the connecting hole, which can realize the fixed connection between the rotating shaft 31 and the rotor 32, effectively prevent the relative rotation between the rotor 32 and the rotating shaft 31, ensure a compact structure, and the structure of the second mating part 311 is simple, easy to process and manufacture, and conducive to reducing production costs.

[0088] In some embodiments, such as Figures 9-11 , Figure 13 As shown, the first mating part 321 includes an extension 71, which is located on the radial inner side of the rotor 32 and is connected to the radial inner side of the rotor 32 and the outer peripheral wall of the rotating shaft 31. The extension 71 can ensure that the rotor 32 and the rotating shaft 31 are reliably connected and improve the connection strength.

[0089] In addition, such as Figures 9-11 , Figure 13As shown, the first mating part 321 also includes a connecting part 72, which passes through the connecting hole and is connected to the extension part 71 at both ends in the length direction. This can restrict the relative rotation of the rotor 32 and the rotating shaft 31, prevent slippage at the connection between the rotating shaft 31 and the rotor 32, ensure reliable connection between the rotating shaft 31 and the rotor 32, prevent the rotor 32 from jumping relative to the rotating shaft 31, and ensure the accuracy and stability of the movement.

[0090] At the same time, such as Figure 11 As shown, along the axial direction of the rotation shaft 31, both ends of the connecting portion 72 are recessed inward in the thickness direction of the extension portion 71 (e.g., Figure 1 As shown in the diagram (vertical direction), when the connecting part 72 passes through the connecting hole, the extension part 71 can limit the rotation shaft 31, preventing it from moving along the axis of the connecting hole and ensuring a reliable connection between the rotation shaft 31 and the rotor 32. Furthermore, the guide member 40 provides support and guidance for the rotation shaft 31, further ensuring better stability during rotation, reducing skewness, improving the reliability of the threaded pair's wear performance, and extending the service life of the control valve 100.

[0091] In some embodiments, such as Figure 1 , Figures 10-12 As shown, the extension 71 is configured as the bottom wall of the clearance space, which facilitates the processing and manufacturing of the clearance space, reduces the structural complexity of the rotor 32, and facilitates processing and manufacturing.

[0092] In some embodiments where a bearing 51 is provided between the second mounting groove 122 and the outer peripheral wall of the rotating shaft 31, the rotating shaft 31 can be limited by the extension 71, and the rotating shaft 31 can be supported and guided by the guide member 40, which can make the position of the rotor 32 relative to the rotation center of the bearing 51 better and ensure the reliability of operation.

[0093] In some embodiments, such as Figure 1 and Figure 12 As shown, the control valve 100 includes a valve block 82, and a valve seat assembly 10 is disposed inside the valve block 82. The valve block 82 can be connected to other external structures to meet the required connection requirements, so that the control valve 100 can realize the function of regulating and controlling the flow rate of the medium in the external structure.

[0094] In addition, such as Figure 1 and Figure 12 As shown, the control valve 100 includes a connector 81. The inner wall of the connector 81 is connected to the valve seat assembly 10, and the outer wall of the connector 81 is connected to the valve block 82. This enables the connection between the valve seat assembly 10 and the valve block 82, ensuring a reliable and compact structural connection and meeting the required fixing requirements. For example, the connector 81 can be a fixing nut.

[0095] In some embodiments of the valve seat assembly 10, which includes an upper valve seat 12 and a lower valve seat 13, such as Figure 1 , Figure 3 and Figure 12 As shown, a first sealing element 92 is provided between the lower valve body and the valve block 82, and the first sealing element 92 is located on the side of the second communication port 112 closer to the first communication port 111. The first sealing element 92 can achieve a seal between the lower valve body and the valve block 82, preventing the medium from passing through the gap between the lower valve body and the valve block 82, and ensuring reliable sealing. For example, the first sealing element 92 can be an O-ring, etc.

[0096] In some embodiments, the lower valve seat 13 extends into the first mounting groove 121 at one end facing the upper valve seat 12 and is connected to the upper valve seat 12, such as... Figure 2 As shown, a second sealing element 93 is provided between the end face of the upper valve seat 12 facing the lower valve seat 13 and the valve body. The second sealing element 93 can achieve a seal between the upper valve body and the valve block 82, preventing the medium from passing through the gap between the upper valve body and the valve block 82, and ensuring reliable sealing. For example, the second sealing element 93 can be a sealing gasket, etc.

[0097] In some embodiments, such as Figure 1 and Figure 12 As shown, the drive assembly 30 also includes a motor 33. The motor 33 and the valve block 82 are arranged along the axial direction of the rotating shaft 31. The rotating shaft 31 and the stator are installed inside the motor 33. The motor 33 can drive the rotor 32 to rotate, so that the rotor 32 can drive the rotating shaft 31 to rotate. The rotation of the rotating shaft 31 can drive the valve core 20 to move along the axial direction of the valve seat assembly 10, thereby realizing the control requirements of the control valve 100.

[0098] In some embodiments, such as Figure 1 and Figure 12 As shown, a third seal 94 is provided between the motor 33 and the valve block 82. The third seal 94 can achieve a seal between the motor 33 and the valve block 82, preventing the medium from passing through the gap between the motor 33 and the valve block 82, and ensuring reliable sealing. For example, the third seal 94 can be an O-ring, etc.

[0099] Other configurations and operations of the control valve 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0100] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0101] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0102] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control valve characterized by, The utility model relates to a valve seat assembly, a valve core, a drive assembly and a guide piece. The valve seat assembly comprises: an upper valve seat and a lower valve seat arranged along the axial direction of the rotating shaft and connected, the through hole penetrating the upper valve seat and the lower valve seat, and the guide piece being located on the side of the upper valve seat away from the lower valve seat and being an integral part of the upper valve seat. The upper valve seat is provided with a second mounting groove in communication with the through hole and coaxial with the through hole, and a bearing is arranged between the second mounting groove and the outer peripheral wall of the rotating shaft. The side of the bearing away from the guide piece is provided with a stopper, and the valve core is adapted to abut against the end surface of the stopper away from the bearing when the valve core moves along the axial direction of the valve seat assembly.

2. The control valve according to claim 1, characterized in that The end of the through hole away from the rotating shaft is formed into a first communication port, the peripheral wall of the lower valve seat is provided with a second communication port in communication with the through hole, the hole wall of the through hole is provided with an annular protruding portion located on the side of the second communication port close to the first communication port, and the outer peripheral wall of the valve core is adapted to abut against the protruding portion. The end of the valve core away from the rotating shaft has an inclined section, and the cross-sectional area of the inclined section gradually decreases in the direction from the upper valve seat to the lower valve seat.

3. The control valve according to claim 2, characterized in that The rotating shaft and the valve core are threadedly connected, and the control valve further comprises:

4. The control valve according to claim 3, characterized in that a limiting piece located in the through hole, the valve core penetrating the limiting piece, one of the limiting piece and the valve core being provided with a limiting groove, and the other being provided with a limiting protrusion matched with the limiting groove.

5. The control valve of claim 2, wherein One of the rotating shaft and the valve core is provided with a threaded portion, and the other is provided with a threaded hole matched with the threaded portion.

6. The control valve according to claim 5, characterized in that The drive assembly further comprises:

7. The control valve of claim 1, wherein a rotor sleeved on the rotating shaft, the end of the rotor towards the valve core having an avoiding space, and the end of the guide piece away from the valve core penetrating the avoiding space. The rotor is provided with a first matching portion, and the rotating shaft is provided with a second matching portion matched with the first matching portion, the second matching portion being formed into a connecting hole extending along the radial direction of the rotating shaft, and the first matching portion comprising:

8. The control valve according to claim 7, characterized in that an extending portion located on the radial inner side of the rotor and connected with the radial inner side of the rotor and the outer peripheral wall of the rotating shaft; 9. The control valve of claim 1, wherein a connecting portion penetrating the connecting hole and connected at both ends in the length direction with the extending portion, and both ends of the connecting portion being recessed in the axial direction of the rotating shaft relative to both ends in the thickness direction of the extending portion. ​ 10. The control valve of claim 9, wherein ​ ​ ​

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