Valve assembly and valve

Abstract

The utility model provides a valve assembly and a valve. The valve assembly comprises a mounting piece, a transmission assembly and a connecting assembly. The transmission assembly can be connected to the valve element through the connecting assembly and used for converting power which is applied to the transmission assembly and rotates around the rotating axis into linear power along the rotating axis and transmitting the linear power to the valve element through the connecting assembly. The connecting assembly comprises a cavity with an opening part and a movable connecting part, the cavity is connected with the transmission assembly, and the movable connecting part is arranged in the cavity, is connected with the valve element through the opening part and can enter and exit from the cavity through the opening part; the cavity is arranged to be capable of rotating relative to the movable connecting part around the rotating axis, and relative movement between the movable connecting part and the cavity along the rotating axis is limited.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of valve manufacturing, in particular, to a valve assembly and a valve. BACKGROUND

[0002] In the field of semiconductors, valves play an important role, and their main functions include cutting off fluid, regulating flow, and changing the direction of fluid, etc., which are important components to ensure process stability and product quality. In the field of semiconductors, high-purity gas is frequently used, and the gas pipeline system in the production equipment usually uses valves suitable for high-purity gas, such as bellows valves.

[0003] In some related technologies, a valve assembly is usually used to drive the valve core to move to open or close the valve port, and to adjust the distance between the valve core and the valve port, so that the pipeline can be turned on or off and the flow can be regulated. However, the valve assembly of the current valve contains many parts (for example, including an external ring sleeve, a positioning pin, etc.), especially the valve assembly that needs to convert rotary power into linear power, which involves more parts, and the excessive parts and the interference fit connection between the parts also cause the valve to have high cost, complex assembly and disassembly, and even destructive disassembly is required to remove some parts, which leads to difficulty in replacing parts and maintenance in the later stage. UTILITY MODEL CONTENT

[0004] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and proposes a valve assembly and a valve, which improves the problem of complex assembly and disassembly process of the valve assembly and poor maintainability of the parts, can improve the convenience of assembly and disassembly of the parts of the valve while ensuring the reliability and stability of the valve, thereby shortening the manufacturing cycle of the valve and reducing the maintenance cost of the valve.

[0005] To achieve the purpose of the present disclosure, a valve assembly is provided, comprising a transmission assembly and a connecting assembly;

[0006] The transmission assembly can be connected to the valve core through the connecting assembly, to convert the power applied on the transmission assembly around the rotation axis into linear power along the rotation axis, and transmit to the valve core through the connecting assembly;

[0007] The connecting assembly comprises a cavity with an opening part and a movable connecting part, wherein the cavity is connected with the transmission assembly, the movable connecting part is arranged in the cavity, and is connected with the valve core through the opening part and can enter and exit the cavity through the opening part; the cavity is arranged to be relatively rotatable with the movable connecting part around the rotation axis, and the relative movement between the movable connecting part and the cavity along the rotation axis is limited.

[0008] In some embodiments, the cavity comprises a first cavity wall, a second cavity wall and a third cavity wall constituting an inner space of the cavity, wherein the first cavity wall and the second cavity wall are arranged in sequence and oppositely along the rotation axis and close to the direction of the valve core, and the third cavity wall is connected between the first cavity wall and the second cavity wall and arranged around the rotation axis; the movable connection part is limited and matched with the first cavity wall and the second cavity wall, respectively.

[0009] The opening part comprises a first opening arranged on the third cavity wall and a second opening arranged on the second cavity wall, the movable connection part can enter and exit the cavity through the first opening, and the movable connection part can be connected with the valve core through the second opening.

[0010] In some embodiments, the second cavity wall comprises an arc-shaped support part extending in a circumferential direction, and the arc-shaped support part encloses the second opening.

[0011] The orthographic projection of the movable connection part on a cross section perpendicular to the rotation axis partially overlaps with the orthographic projection of the arc-shaped support part on the cross section and partially overlaps with the orthographic projection of the second opening on the cross section.

[0012] In some embodiments, the central angle corresponding to the arc length of the arc-shaped support part is greater than or equal to 180°.

[0013] In some embodiments, the movable connection part comprises a movable piece and a connecting piece, the movable piece is located between the first cavity wall and the connecting piece to enable the relative rotation of the first cavity wall and the connecting piece around the rotation axis.

[0014] The connecting piece can be connected with the valve core through the second opening.

[0015] In some embodiments, in a direction parallel to the rotation axis, the first opening and the movable piece are at least partially staggered.

[0016] In some embodiments, the movable piece comprises a rotating bearing.

[0017] In some embodiments, the movable piece comprises a rolling body, and

[0018] The first cavity wall and the connecting piece are each provided with a limiting groove on two surfaces opposite to each other, and the rolling body is rollably arranged between the limiting grooves on the two surfaces.

[0019] In some embodiments, the valve assembly further comprises a mounting piece, a connecting rod and a radial limiting piece.

[0020] The mounting member is connectable to the valve body, and the transmission assembly cooperates with the mounting member to convert power applied to the transmission assembly to rotate around the rotation axis into linear power along the rotation axis;

[0021] The mounting member has a hollow space passing through the mounting member along the rotation axis, and the connecting assembly, the connecting rod and the radial limiting member are located in the hollow space;

[0022] The radial limiting member is located on the side of the cavity close to the valve core, and is used to connect with the valve core, and the outer peripheral surface of the radial limiting member cooperates with the inner peripheral surface of the mounting member to form the limiting fit of the hollow space;

[0023] One end of the connecting rod is connected with the radial limiting member, and the other end passes through the opening part and is connected with the movable connecting part.

[0024] In some embodiments, the valve assembly further comprises a bellows assembly located in the hollow space, and the bellows assembly comprises a moving shaft and a bellows sleeved on the moving shaft;

[0025] One end of the radial limiting member is connected with the moving shaft, and the other end of the moving shaft is used to connect with the valve core; one end of the bellows is sealingly connected with the radial limiting member, and the other end is used to sealingly connect with the mounting surface of the valve body.

[0026] In some embodiments, the transmission assembly comprises a valve rod provided with a first external thread;

[0027] The mounting member has a hollow space passing through the mounting member along the rotation axis, the valve rod is coaxially arranged along the rotation axis, and one end of the valve rod extends into the hollow space and is connected with the cavity; the inner peripheral surface of the mounting member forming the hollow space is provided with a first internal thread, the first internal thread cooperates with the first external thread, and when the valve rod is applied with power to rotate around the rotation axis, the valve rod moves along the rotation axis relative to the mounting member, and simultaneously drives the cavity, the movable connecting part and the valve core to move along the rotation axis while rotating the cavity relative to the movable connecting part.

[0028] As another technical solution, the disclosure also provides a valve, comprising:

[0029] A valve body has a mounting surface, and a mounting groove is arranged on the mounting surface, and a valve port is formed on the groove bottom surface of the mounting groove;

[0030] A valve core is at least partially located in the mounting groove; and

[0031] The valve assembly provided by the present disclosure is connected with the valve core and used to drive the valve core to move along the rotation axis to open or close the valve port.

[0032] In some embodiments, the valve further comprises a locking member in the form of a ring and provided with a second internal thread on the inner periphery, and the valve body is provided with a second external thread on the outer periphery, which is matched with the second internal thread;

[0033] The locking member is sleeved on the outer periphery of the mounting member, and a positioning structure is formed between the mounting member and the locking member to press and fix the mounting member to the mounting surface of the valve body when the locking member is in a screwed state.

[0034] The present disclosure has the following beneficial effects:

[0035] The valve assembly provided by the present disclosure can realize quick connection and disassembly of the movable connecting part by adopting the cavity with the opening part and the movable connecting part capable of entering and exiting the cavity through the opening part, facilitate users to quickly complete the modular replacement of parts, and improve the maintainability of the valve. On this basis, the cavity and the movable connecting part can rotate relative to the rotation axis, and the relative movement between the movable connecting part and the cavity along the rotation axis is limited, so that the movable connecting part does not rotate when the transmission assembly drives the cavity to rotate, and at the same time, the movable connecting part can be driven by the cavity to move synchronously along the rotation axis, thereby driving the valve core to move to open or close the valve port and adjust the distance between the valve core and the valve port. Therefore, the valve assembly of the present disclosure has the advantages of simple structure, reliable connection, and good operation continuity and stability, on the basis of converting rotary power into linear power and transmitting the linear power to the valve core.

[0036] The valve provided by the present disclosure can quickly disassemble and replace the parts in the valve assembly without destructive disassembly of the parts when the valve is maintained, thereby improving the maintainability of the valve and reducing the maintenance cost. On this basis, the valve body is provided with a mounting groove formed with a valve port on the bottom surface of the groove, the valve core is at least partially located in the mounting groove, and the above-mentioned valve assembly can drive the valve core to move in the mounting groove to open or close the valve port and adjust the distance between the valve core and the valve port. Therefore, the valve of the present disclosure has the advantages of simple structure, reliable connection, and good operation continuity and stability, on the basis of converting rotary power into linear power and transmitting the linear power to the valve core through the valve assembly. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the valve in the related art.

[0038] Figure 2An exploded schematic view of the structure of the valve provided by the embodiment of the present disclosure.

[0039] Figure 3 A sectional view of the structure of the valve provided by the embodiment of the present disclosure.

[0040] Figure 4 A partial sectional view of the valve assembly is shown in the enlarged view of the circle A. Figure 3

[0041] A partial sectional view of the valve assembly is shown in the enlarged view of the circle A. Figure 5 Figure 3 A partial sectional view of the valve assembly is shown in the enlarged view of the circle A.

[0042] Figure 6 Figure 3 A partial sectional view of the valve assembly is shown in the enlarged view of the circle A.

[0043] Figure 7 An exploded schematic view of the structure of the valve assembly provided by the embodiment of the present disclosure.

[0044] Figure 8 A schematic view of the structure of the valve assembly provided by the embodiment of the present disclosure.

[0045] Figure 9 A schematic view of the structure of the movable member provided by the embodiment of the present disclosure.

[0046] Figure 10 A schematic view of the structure of the valve provided by the embodiment of the present disclosure.

[0047] Figure 11 A sectional view of the valve assembly provided by another embodiment of the present disclosure.

[0048] Figure 12 A sectional view of the valve assembly provided by another embodiment of the present disclosure.

[0049] Figure 13 A sectional view of the valve assembly provided by another embodiment of the present disclosure.

[0050] Figure 14 A sectional view of the valve assembly provided by another embodiment of the present disclosure.

[0051] List of reference signs:

[0052] ​​1, bellows valve; 11, upper valve rod; 12, lower valve rod; 13, half ring sleeve; 14, ball; 15, clamping wire; 16, valve cap; 17, bellows assembly; 20, valve; 21, valve body; 22, valve core; 23, mounting surface; 24, mounting groove; 25, valve port; 26, locking piece; 27, inlet passage; 28, outlet passage; 200, valve assembly; 210, transmission assembly; 211, valve rod; 220, mounting piece; 221, hollow space; 230, connecting assembly; 240, cavity; 241, first cavity wall; 242, second cavity wall; 243, third cavity wall; 244, arc-shaped support portion; 245, recessed portion; 250, movable connecting portion; 251, movable piece; 252, connecting piece; 253, rotating bearing; 254, first seat pad; 255, second seat pad; 256, thrust ball mechanism; 257, rolling body; 258, limiting groove; 260, opening portion; 261, first opening; 262, second opening; 270, connecting rod; 280, radial limiting piece; 290, bellows assembly; 291, movement shaft; 292, bellows; S, rotation axis. DETAILED DESCRIPTION

[0053] To make the technical personnel in the art better understand the technical solutions of the present disclosure, the valve assembly and valve provided by the present disclosure are described in detail below in combination with the drawings.

[0054] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "upper", "lower", "left", "right", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is usually placed, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. Of course, when the semiconductor device is installed in a circuit, the positional relationship between the components is based on the actual orientation.

[0055] In addition, in the description of the present disclosure, unless specifically indicated, the singular form of expression can include the plural concept.

[0056] In addition, the terms "first", "second", and the like are only used for differentiation in description, and should not be understood as indicating or implying relative importance or order.

[0057] In addition, it should be noted that the features in the embodiments of the present disclosure can be arbitrarily combined with each other without indicating conflicts.

[0058] In some related technologies, such as Figure 1As shown, the bellows valve 1 has a transmission mechanism including an upper valve stem 11, a lower valve stem 12, two half-ring sleeves 13, a ball 14, two clamping wires 15, a bonnet 16, and a bellows assembly 17. The ball 14 is contained between the lower end of the upper valve stem 11 and the upper end of the lower valve stem 12, and the outer side of the lower end of the upper valve stem 11 and the outer side of the upper end of the lower valve stem 12 are surrounded and clamped by the two half-ring sleeves 13. The upper and lower ends of the two half-ring sleeves 13 are respectively provided with annular groove structures, and the two clamping wires 15 are respectively arranged in the upper end annular groove and the lower end annular groove of the two half-ring sleeves 13 to assemble the upper valve stem 11, the lower valve stem 12, the two half-ring sleeves 13, and the ball 14 together. When the upper valve stem 11 converts the power of rotating around its axis into the power of moving in a straight line along the axis, the lower valve stem 12 can be moved along the axis by the upper valve stem 11 under the action of the ball 14 without rotating, and under the constraint of the two half-ring sleeves 13. In use, the torsion generated by the rotation of the upper valve stem 11 is borne by the half-ring sleeves 13 and the ball 14, thereby prolonging the service life of the bellows assembly.

[0059] However, the bellows valve 1 has technical problems such as too many parts in the transmission mechanism, high cost, complex assembly and disassembly, and difficulty in single-person operation. Specifically, in addition to the upper valve stem 11 and the lower valve stem 12, the transmission mechanism of the bellows valve 1 also needs to be provided with the two half-ring sleeves 13, the ball 14, and the two clamping wires 15. In assembly, the ball 14 needs to be first placed in the cavity between the upper valve stem 11 and the lower valve stem 12, then the two half-ring sleeves 13 need to be arranged to surround and clamp the upper valve stem 11 and the lower valve stem 12, and finally the clamping wires 15 need to be arranged in the annular grooves of the two half-ring sleeves 13 for fixation, which leads to a complicated assembly process of the transmission mechanism of the bellows valve 1, and it is difficult for an assembly worker to complete the assembly alone. In disassembly, since the clamping wires 15 are arranged in the annular grooves, they are not easy to take out, and destructive disassembly of the half-ring sleeves 13 and / or the clamping wires 15 is needed, which makes it very difficult to maintain or replace the parts of the transmission mechanism of the bellows valve 1, and the damaged parts cannot be reused, increasing the use cost. In addition, when the transmission mechanism of the bellows valve 1 converts the rotary power into the linear power, the friction force generated by the contact between the half-ring sleeves 13 and the upper valve stem 11 is undesirable, which will lead to a decrease in the continuity and stability of the operation of the transmission mechanism.

[0060] To solve the above technical problems, as shown in Figures 2 to 14 The valve assembly 200 provided by the embodiments of the present disclosure includes a transmission assembly 210 and a connecting assembly 230. In some embodiments, as shown in Figures 2 to 4 The valve assembly 200 can include a mounting member 220. In use, the mounting member 220 can be connected to a valve body 21 of a valve. The mounting member 220 is used to provide a mounting basis for the transmission assembly 210 and the connecting assembly 230.

[0061] In some embodiments, the valve is, for example, a bellows valve. The bellows valve is a kind of valve suitable for high-purity gas passing, which has the advantages of accurate flow regulation, convenient operation, excellent air tightness, corrosion resistance, high vacuum, high temperature resistance and the like. In addition, the bellows, which is the core part of the bellows valve, can play a good sealing and displacement compensation role, and can effectively resist the corrosion of chemicals in semiconductor production. The valve assembly 200 provided by the embodiments of the present disclosure can be used in the above-mentioned valve. However, the embodiments of the present disclosure are not limited thereto, and the valve assembly 200 provided by the embodiments of the present disclosure can also be applied to valves of other structures, for realizing the conversion of rotary power into linear power and transmitting the linear power to the valve core, and achieving the effects of simple structure, reliable connection, and good operation continuity and stability.

[0062] Referring to Figure 2 and Figure 3 , the transmission assembly 210 can be connected to the valve core 22 through the connecting assembly 230, so as to convert the power applied on the transmission assembly 210 around the rotation axis S into linear power along the rotation axis S, and transmit the linear power to the valve core 22 through the connecting assembly 230. In other words, the movement of the transmission assembly 210 along the rotation axis S causes the connecting assembly 230 to move along the rotation axis S, and thus causes the valve core 22 to move along the rotation axis S. The power applied on the transmission assembly 210 around the rotation axis S is rotary power, and the transmission assembly 210 can move along the rotation axis S while rotating. In actual application, the power applicator of the rotary power can be a person or a driving source such as a rotary motor.

[0063] Referring to Figures 2 to 9 , the connecting assembly 230 includes a cavity 240 with an opening part 260 and a movable connecting part 250. The cavity 240 is connected to the transmission assembly 210. The movable connecting part 250 is arranged in the cavity 240. The movable connecting part 250 is connected to the valve core 22 through the opening part 260. The movable connecting part 250 can enter and exit the cavity 240 through the opening part 260. The cavity 240 is arranged to be relatively rotatable with the movable connecting part 250 around the rotation axis S. The cavity 240 limits the relative movement between the movable connecting part 250 and the cavity 240 along the rotation axis S, and can drive the movable connecting part to move along the rotation axis S synchronously, so as to drive the valve core to move, so as to realize the functions of opening or closing the valve port by the valve core, and adjusting the distance between the valve core and the valve port.

[0064] In the embodiments in which the valve assembly 200 can further include the mounting member 220, the transmission assembly 210 can cooperate with the mounting member 220 to convert the power applied on the transmission assembly 210 around the rotation axis S into linear power along the rotation axis S, for example, the transmission assembly 210 can move along the rotation axis S while rotating by cooperating with the mounting member 220.

[0065] In order to realize the movement of the transmission assembly 210 along the rotation axis S while rotating, the transmission assembly 210 can be matched with the mounting member 220 in various ways. In some embodiments, as shown in Figure 2 、 Figure 3 shown, the transmission assembly 210 includes a valve stem 211 provided with a first external thread. The mounting member 220 has a hollow space 221 penetrating through the mounting member 220 along the rotation axis S. The valve stem 211 is coaxially arranged along the rotation axis S, for example. The inner peripheral surface of the hollow space 221 of the mounting member 220 is provided with a first internal thread. The first internal thread of the mounting member 220 is matched with the first external thread of the valve stem 211. In this matching manner, when the valve stem 211 is subjected to a rotating force around the rotation axis S, the valve stem 211 can move along the rotation axis S relative to the mounting member 220. The valve stem 211 rotates around the rotation axis S in different directions, and moves along the rotation axis S in different directions. In some embodiments, the mounting member 220 can be a bonnet provided with the hollow space 221 and the first internal thread. Of course, in actual applications, the mounting member 220 can also be other structures provided with an internal thread, and the embodiments of the present disclosure have no limitation in this regard.

[0066] On this basis, in some embodiments, as shown in Figure 3 , one end (for example, the lower end in Figure 3 ) of the valve stem 211 extends into the hollow space 221 and is connected with the cavity 240. Since the cavity 240 and the movable connection portion 250 can rotate relative to each other around the rotation axis S, when the valve stem 211 synchronously drives the cavity 240 to rotate relative to the movable connection portion 250, the movable connection portion 250 can not rotate, thereby ensuring that the valve core does not rotate. At the same time, the valve stem 211 synchronously drives the cavity 240, the movable connection portion 250, and the valve core 22 to move along the rotation axis S.

[0067] It should be noted that the matching between the transmission assembly 210 and the mounting member 220 can also be other matching manners of converting the rotating motion power into linear motion power, such as gear and rack matching, and the embodiments of the present disclosure have no limitation in this regard.

[0068] The cavity 240 can be connected to one end of the valve stem 211 in various ways. In some embodiments, the valve stem 211 can be integrally formed with the cavity 240. In other embodiments, the valve stem 211 can be connected with the cavity 240 by welding or other fixing manners.

[0069] In some embodiments, as shown in Figures 3 to 8As shown, the cavity 240 comprises a first cavity wall 241, a second cavity wall 242 and a third cavity wall 243 which constitute the internal space of the cavity 240. The first cavity wall 241 and the second cavity wall 242 are arranged in sequence along the rotation axis S and relative to the direction of the spool 22. The third cavity wall 243 is connected between the first cavity wall 241 and the second cavity wall 242 and is arranged around the rotation axis S. For example, in the direction of the paper as shown, the first cavity wall 241 is the upper cavity wall of the cavity 240, the second cavity wall 242 is the lower cavity wall of the cavity 240, and the third cavity wall 243 is the circumferential side wall of the cavity 240. Figure 3 As shown, in the direction of the paper, the upper end of the movable connecting part 250 is in contact with the first cavity wall 241, and the lower end of the movable connecting part 250 is in contact with the second cavity wall 242 to form a limiting fit, limiting the relative movement of the movable connecting part 250 along the rotation axis S relative to the cavity 240. The second cavity wall 242 is located downstream of the movable connecting part 250 along the rotation axis S, and when the linear force along the rotation axis S is transmitted from the first cavity wall 241 to the movable connecting part 250, the second cavity wall 242 can sufficiently limit the downward movement of the movable connecting part 250 without adding any additional parts, thereby reducing the number of parts of the valve assembly. Figure 3 As shown, in the direction of the paper, the upper end of the movable connecting part 250 is in contact with the first cavity wall 241, and the lower end of the movable connecting part 250 is in contact with the second cavity wall 242 to form a limiting fit, limiting the relative movement of the movable connecting part 250 along the rotation axis S relative to the cavity 240. The second cavity wall 242 is located downstream of the movable connecting part 250 along the rotation axis S, and when the linear force along the rotation axis S is transmitted from the first cavity wall 241 to the movable connecting part 250, the second cavity wall 242 can sufficiently limit the downward movement of the movable connecting part 250 without adding any additional parts, thereby reducing the number of parts of the valve assembly.

[0070] On this basis, the opening part 260 comprises a first opening 261 arranged on the third cavity wall 243 and a second opening 262 arranged on the second cavity wall 242. For example, in the direction of the paper as shown, the first opening 261 is located on the side of the cavity 240, and the second opening is located on the bottom of the cavity 240. Figure 4 As shown, in the direction of the paper, the upper end of the movable connecting part 250 is in contact with the first cavity wall 241, and the lower end of the movable connecting part 250 is in contact with the second cavity wall 242 to form a limiting fit, limiting the relative movement of the movable connecting part 250 along the rotation axis S relative to the cavity 240. The second cavity wall 242 is located downstream of the movable connecting part 250 along the rotation axis S, and when the linear force along the rotation axis S is transmitted from the first cavity wall 241 to the movable connecting part 250, the second cavity wall 242 can sufficiently limit the downward movement of the movable connecting part 250 without adding any additional parts, thereby reducing the number of parts of the valve assembly.

[0071] In some embodiments, as shown in the direction of the paper, Figure 5 , Figure 7 , Figure 8 , Figure 13 , Figure 14As shown, the third cavity wall 243 can be an arc-shaped wall extending in a circumferential direction, the center of which can coincide with the rotation axis S for example. The first opening 261 can be an arc-shaped opening enclosed by the arc-shaped wall, the central angle of which can be 180° for example, but the embodiments of the present disclosure are not limited thereto, and the size of the central angle can be set according to the size of the movable connecting part 250, as long as the movable connecting part 250 can enter and exit. In a specific embodiment, the arc-shaped wall is a non-closed ring body, and the space enclosed between the first cavity wall 241 and the second cavity wall 242 is the internal space of the cavity 240 for accommodating the movable connecting part 250. The interval between the two ends of the non-closed ring body in the circumferential direction constitutes the first opening 261.

[0072] In some embodiments, as shown in Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 13 、 Figure 14 As shown, the second cavity wall 242 can include an arc-shaped support part 244 extending in a circumferential direction. The arc-shaped support part 244 encloses the second opening 262. The orthographic projection of the movable connecting part 250 on a cross section perpendicular to the rotation axis S partially overlaps the orthographic projection of the arc-shaped support part 244 on the cross section, and partially overlaps the orthographic projection of the second opening 262 on the cross section. In other words, in use, the upper end of the movable connecting part 250 is in contact with the first cavity wall 241, and the lower end of the movable connecting part 250 is in contact with the arc-shaped support part 244 to form a limit fit. At the same time, the movable connecting part 250 will not exit the internal space of the cavity 240 by passing through the second opening 262 along the rotation axis S. In this embodiment, the arc-shaped support part 244 can support the movable connecting part 250 and limit the movable connecting part 250 in the internal space of the cavity 240.

[0073] In some embodiments, as shown in Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 10 、 Figure 11 As shown, the valve assembly 200 can further include a connecting rod 270, one end of which is connected to the movable connecting part 250 through the opening part 260 (for example, the second opening 262), and the other end of which can be directly connected to the valve core 22 or connected to the valve core 22 through other components.

[0074] In some embodiments, as shown in Figure 6As shown, the width of the second opening 262 in the circumferential direction of the arc-shaped support portion 244 can decrease along the direction from the outside to the inside, i.e., the second opening 262 is similar to a trumpet-shaped opening, so that the connecting member (e.g., the connecting rod 270) between the movable connecting portion 250 and the valve core 22 can more conveniently enter and exit the second opening 262. In a specific embodiment, the second opening 262 includes a tapered opening section and a straight opening section arranged in sequence along the direction from the outside to the inside, the minimum width of the tapered opening section in the circumferential direction of the arc-shaped support portion 244 is equal to the width of the straight opening section in the circumferential direction of the arc-shaped support portion 244, wherein the tapered opening section provides convenience for the connecting rod 270 to enter and exit; the width of the straight opening section is matched with the outer diameter of the connecting rod 270, so as to increase the contact area between the arc-shaped support portion 244 and the movable connecting portion 250, and ensure that the arc-shaped support portion 244 can sufficiently support the movable connecting portion 250.

[0075] In some embodiments, as shown in Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 13 、 Figure 14 As shown, the central angle corresponding to the arc length of the arc-shaped support portion 244 can be greater than or equal to 180°, so as to sufficiently support the movable connecting portion 250. For example, as shown in Figure 13 and Figure 14 , the central angle corresponding to the arc length of the arc-shaped support portion 244 is equal to 180°. On this basis, in some embodiments, as shown in Figure 13 and Figure 14 , the arc-shaped support portion 244 can be provided with a recessed portion 245, which can be matched with the shape of the movable connecting portion 250 to serve as a positioning function. For another example, as shown in Figures 6 to 8 , the central angle corresponding to the arc length of the arc-shaped support portion 244 can be greater than 180°, and the size of the central angle can depend on the outer diameter of the connecting rod 270 in actual application.

[0076] In order to realize the relative rotation of the movable connecting portion 250 around the rotation axis S in the cavity 240 on the basis of the connection between the movable connecting portion 250 and the valve core 22 through the opening portion 260, in some embodiments, as shown in Figure 2 、 Figure 4 、 Figure 7 、 Figure 11As shown, the movable connecting portion 250 includes a movable member 251 and a connecting member 252. The movable member 251 is located between the first cavity wall 241 and the connecting member 252 to enable relative rotation between the first cavity wall 241 and the connecting member 252 about the rotation axis S. When the power applied to the transmission assembly 210 to rotate about the rotation axis S is converted into linear power along the rotation axis S, the movable member 251 bears the torque generated by the rotation, thereby prolonging the service life of the valve assembly 200. The connecting member 252 is connectable to the spool 22 through the second opening 262. In the embodiment in which the valve assembly 200 further includes a connecting rod 270, one end of the connecting rod 270 is connected to the connecting member 252 through the second opening 262.

[0077] In some embodiments, as shown in Figure 3 , Figure 4 , Figure 11 As shown, in the direction parallel to the rotation axis S, the first opening 261 and the movable member 251 can be at least partially misaligned to prevent the movable member 251 from undesirably leaving the cavity 240 after the movable member 251 is assembled into the inner space of the cavity 240. That is, the outer periphery of the movable member 251 at least partially overlaps the circumferential side wall (i.e., the third cavity wall 243) of the cavity 240 in the direction along the rotation axis S, so that the circumferential side wall (i.e., the third cavity wall 243) of the cavity 240 can function as a limiting member for the movable member 251. For example, as shown in the paper surface direction, the height of the top end of the movable member 251 is higher than the height of the top end of the first opening 261, so that the outer periphery of the movable member 251 at least partially overlaps the circumferential side wall (i.e., the third cavity wall 243) of the cavity 240 in the direction along the rotation axis S, where the height refers to the extending distance from bottom to top along the rotation axis S in the paper surface direction. On this basis, in some embodiments, the height of the bottom end of the movable member 251 can be higher than or flush with the height of the top end of the first opening 261, in which case the first opening 261 and the movable member 251 can be completely misaligned in the direction parallel to the rotation axis S. In other embodiments, the height of the bottom end of the movable member 251 can be lower than the height of the top end of the first opening 261, in which case the first opening 261 and the movable member 251 can be partially misaligned in the direction parallel to the rotation axis S. Figure 4

[0078] To enable the relative rotation between the first cavity wall 241 and the connecting member 252 about the rotation axis S, the structure of the movable member 251 can be various. In some embodiments, as shown in Figure 9 ​As shown, the movable member 251 can include a rotary bearing 253. In some embodiments, the rotary bearing 253 can be a thrust ball bearing. The thrust ball bearing can include a first seat pad 254 facing the first cavity wall 241, a second seat pad 255 facing the connecting member 252, and a thrust ball mechanism 256 between the first seat pad 254 and the second seat pad 255, two ends of the thrust ball mechanism 256 being connected to the first seat pad 254 and the second seat pad 255 respectively, and the two ends of the thrust ball mechanism 256 being able to rotate relative to each other, so that the first seat pad 254 and the second seat pad 255 can rotate relative to each other. In assembly, the first seat pad 254, the thrust ball mechanism 256, the second seat pad 255 of the thrust ball bearing are sequentially assembled into the cavity 240 through the first opening 261 to form a complete movable member 251, and then the connecting member 252 is assembled into the cavity 240, so that the assembly process of the valve assembly 200 can be simply and conveniently completed. On this basis, the height of the first opening 261 can be further reduced to at least greater than the height of any one of the first seat pad 254, the thrust ball mechanism 256, the second seat pad 255 and the connecting member 252, so as to further ensure that the movable connecting part 250 will not come out of the first opening 261 when moving along the rotation axis S. In some embodiments, the third cavity wall 243 can include an inner side wall matched in shape with the circumferential side of the first seat pad 254, the thrust ball mechanism 256 and the second seat pad 255, the first seat pad 254, the thrust ball mechanism 256 and the second seat pad 255 can be assembled into the cavity 240 through the first opening 261 and moved to a predetermined assembly position along the guide of the inner side wall of the third cavity wall 243. In some embodiments, the first cavity wall 241 and the first seat pad 254 can include positioning planes matched in shape therebetween to achieve limiting cooperation therebetween by surface contact, so as to limit the relative rotation of the first seat pad 254 and the first cavity wall 241 around the rotation axis S by friction. Similarly, in some embodiments, the connecting member 252 and the second seat pad 255 can also include positioning planes matched in shape therebetween. For example, the assembled thrust ball bearing can have a cylindrical shape, and therefore the space between a part of the third cavity wall 243, the first cavity wall 241 and the connecting member 252 can form a corresponding cylindrical shape. It should be noted that other cooperation modes, such as concave-convex surface cooperation, can also be adopted between the first cavity wall 241 and the first seat pad 254, and between the connecting member 252 and the second seat pad 255, and the present disclosure has no limitation in this regard, as long as the relative rotation between the first cavity wall 241 and the first seat pad 254, and between the connecting member 252 and the second seat pad 255 around the rotation axis S can be prevented. In use, the linear power along the rotation axis S and the torque generated by rotation are transmitted from the first cavity wall 241 to one end of the thrust ball mechanism 256 through the first seat pad 254, the torque is borne by the thrust ball mechanism 256 through rotation, and the linear power along the rotation axis S is transmitted to the connecting member 252 through the other end of the thrust ball mechanism 256 and the second seat pad 255.It should be noted that the movable member 251 can also adopt other rotating pair structures, and the embodiments of the present disclosure do not limit this, as long as the first cavity wall 241 and the connecting member 252 can rotate relative to each other around the rotation axis S.

[0079] In other embodiments, as shown in Figure 11 and Figure 12 , the movable member 251 can also include a rolling body 257. The first cavity wall 241 and the connecting member 252 are provided with limiting grooves 258 on the two surfaces opposite to each other. The rolling body 257 is rollingly arranged between the limiting grooves 258 on the two surfaces. The cooperation between the rolling body 257 and the limiting grooves 258 can keep the connecting member 252 and the valve core 22 aligned with the rotation axis S when the connecting member 252 moves along the rotation axis S. Since the rolling body 257 described above can roll relative to the cavity 240 within the limiting grooves 258, when the cavity 240 rotates around the rotation axis S relative to the rolling body 257, the torque of the cavity 240 will not be transmitted to the connecting member 252, so that the connecting member 252 can not rotate.

[0080] In the embodiments provided with the connecting rod 270 and the mounting member 220 having the hollow space 221, as shown in Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 10 , Figure 11 , the valve assembly 200 can also include a radial limiting member 280. The connecting assembly 230, the connecting rod 270 and the radial limiting member 280 are all located in the hollow space 221 of the mounting member 220. The radial limiting member 280 is located on the side of the cavity 240 close to the valve core 22, and is used to connect with the valve core 22. The outer circumferential surface of the radial limiting member 280 is in limiting fit with the inner circumferential surface of the mounting member 220 constituting the hollow space 221. One end of the connecting rod 270 is connected with the radial limiting member 280, and the other end passes through the opening portion 260 and is connected with the movable connecting portion 250. The limiting fit between the radial limiting member 280 and the mounting member 220 can limit the movement of the movable connecting portion 250 in the radial direction, so as to not only prevent the movable connecting portion 250 from undesirably moving away from the cavity 240 in the radial direction, but also avoid the displacement of the movable connecting portion 250 in the radial direction, which causes the valve core 22 to be offset, for example, the connecting rod 270, the valve core 22 and the valve stem 211 can be kept coaxial, and all of them are coaxial with the rotation axis S.

[0081] In some embodiments, the connecting rod 270 and the radial limiting member 280 are welded. Of course, in actual applications, the connecting rod 270 and the radial limiting member 280 can also be fixedly connected by other means, for example, the connecting rod 270 can be integrally formed with the radial limiting member 280, and the embodiments of the present disclosure do not limit this.

[0082] In some embodiments, as shown in Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 、 Figure 10 The valve assembly 200 can further include a bellows assembly 290 located in the hollow space 221. The bellows assembly 290 includes a moving shaft 291 and a bellows 292 sleeved on the moving shaft 291. The radial position limiter 280 is connected to one end of the moving shaft 291, and the other end of the moving shaft 291 is used to be connected with the valve core 22. One end of the bellows 292 is sealingly connected with the radial position limiter 280, and the other end is used to be sealingly connected with the mounting surface 23 of the valve body 21. In some embodiments, the moving shaft 291 and the radial position limiter 280 are weldedly connected. Of course, in actual application, the moving shaft 291 and the radial position limiter 280 can also be fixedly connected by other means, for example, the moving shaft 291 can be integrally formed with the radial position limiter 280, and the present disclosure has no limitation on this.

[0083] In summary, the valve assembly 200 provided by the embodiments of the present disclosure can realize the quick connection and disassembly of the movable connecting part 250 by adopting the cavity 240 with the opening part 260 and the movable connecting part 250 capable of entering and exiting the cavity 240 through the opening part 260, which facilitates the user to quickly complete the modular replacement of parts and improves the maintainability of the valve. On this basis, by virtue of the relative rotation of the cavity 240 and the movable connecting part 250 around the rotation axis S and the limitation of the relative movement between the movable connecting part 250 and the cavity 240 along the rotation axis S, the movable connecting part 250 can be prevented from rotating when the cavity 240 is rotated by the transmission assembly 210, while the movable connecting part 250 can be driven to move along the rotation axis S synchronously by the cavity 240, so as to drive the valve core 22 to move, thereby realizing the functions of opening or closing the valve port 25 by the valve core 22 and adjusting the distance between the valve core 22 and the valve port 25. Therefore, the valve assembly 200 of the present disclosure has the advantages of simple composition, reliable connection, good operation continuity and stability, etc. on the basis of realizing the conversion of rotary power into linear power and the transmission of the linear power to the valve core 22.

[0084] As another technical solution, as shown in Figure 2 、 Figure 3As shown, the valve 20 according to the present disclosure further provides a valve 20, in particular a bellows valve. The valve 20 comprises a valve body 21, a valve core 22 and the valve assembly 200 according to any of the above embodiments. The valve body 21 has a mounting surface 23. The mounting surface 23 is provided with a mounting groove 24, and the groove bottom surface of the mounting groove 24 is formed with a valve port 25. The valve body 21 comprises an inlet flow passage 27 and an outlet flow passage 28 which are communicated to the outside of the valve 20, the inlet flow passage 27 is formed in the groove side surface of the mounting groove 24, and the outlet flow passage 28 is formed on the inner side of the valve port 25. The valve core 22 is at least partially located in the mounting groove 24. The valve assembly 200 is connected with the valve core 22, and is used to drive the valve core 22 to move along the rotation axis S to open or close the valve port 25. Specifically, the valve core 22 can have a tapered surface, the outer diameter of the tapered surface increases in the direction away from the valve port 25, and the tapered surface is used to close the valve port 25 when the valve core 22 is in a first position, in which the fluid passage between the inlet flow passage 27 and the outlet flow passage 28 is blocked by the valve core 22. The valve core 22 moves from the first position to a second position in the direction away from the valve port 25 to open the valve port 25, in which the fluid communication is formed between the inlet flow passage 27 and the outlet flow passage 28.

[0085] The valve 20 according to the present disclosure can quickly disassemble and replace the parts in the valve assembly 200 without destructive disassembly when the valve 20 is maintained, by adopting the above-mentioned valve assembly 200 provided by the present disclosure, thereby improving the maintainability of the valve 20 and reducing the maintenance cost. On this basis, by virtue of the mounting groove 24 with the groove bottom surface formed with the valve port on the mounting surface 23 of the valve body 21, the valve core 22 at least partially located in the mounting groove 24, and the above-mentioned valve assembly 200, the movement of the valve core 22 in the mounting groove 24 can be driven to realize the functions of opening or closing the valve port 25 by the valve core 22, and adjusting the distance between the valve core 22 and the valve port 25. Therefore, on the basis of the valve assembly 200 realizing the conversion of rotary power into linear power and transmitting the linear power to the valve core 22, the valve 20 according to the present disclosure has the advantages of simple composition, reliable connection, good operation continuity and stability, etc.

[0086] In some embodiments, as Figure 2 、 Figure 3As shown, valve 20 may further include a locking member 26 that is annular and has a second internal thread on its inner circumference. The outer circumference of valve body 21 has a second external thread, which engages with the second internal thread. When the locking member 26 is tightened, valve core 22, connected to valve assembly 200, is aligned with the mounting groove 24 of valve body 21. In some embodiments, the radial limiting member 280, through the connection between valve body 21 and valve assembly 200, radially limits the position between valve core 22 and mounting groove 24 for further alignment. In embodiments where valve assembly 200 may also include mounting member 220, the locking member 26 is sleeved on the outer circumference of mounting member 220. A positioning structure is formed between mounting member 220 and locking member 26 for pressing and fixing mounting member 220 to mounting surface 23 of valve body 21 when locking member 26 is tightened.

[0087] In some embodiments, the locking element 26 can be a locking nut. Of course, in practical applications, the locking element 26 can also be other locking structures, and this disclosure does not limit this.

[0088] The first example of a valve using a valve assembly according to this disclosure will now be described in detail.

[0089] like Figures 2 to 10 As shown, this example provides a valve 20, which is a bellows valve, including a valve body 21, a valve core 22, a valve assembly 200 in combination with one or more of the above embodiments, a locking member 26, and a positioning structure.

[0090] The valve body 21 comprises a mounting surface 23, an inlet passage 27 and an outlet passage 28. The mounting surface 23 is provided with a mounting groove 24, and the groove bottom surface of the mounting groove 24 is formed with a valve port 25. The valve core 22 is at least partially located in the mounting groove 24. The inlet passage 27 and the outlet passage 28 are communicated to the outside of the valve 20. The inlet passage 27 is formed in the groove side surface of the mounting groove 24, and the outlet passage 28 is formed in the inner side of the valve port 25. The valve assembly 200 is connected with the valve core 22, and is used to drive the valve core 22 to move along the rotation axis S to open or close the valve port 25. The valve core 22 has a tapered surface, and the outer diameter of the tapered surface increases in the direction away from the valve port 25. The tapered surface is used to close the valve port 25 when the valve core 22 is in a first position, and the fluid passage between the inlet passage 27 and the outlet passage 28 is blocked by the valve core 22. The valve core 22 moves in the direction away from the valve port 25 from the first position to a second position to open the valve port 25, and the fluid communication is formed between the inlet passage 27 and the outlet passage 28 at the second position. The locking member 26 is annular, and the inner periphery of the locking member 26 is provided with a second internal thread. The locking member 26 is, for example, a locking nut. The outer periphery of the valve body 21 is provided with a second external thread, and the second external thread is matched with the second internal thread. The locking member 26 is sleeved on the outer periphery of the mounting member 220. The positioning structure is formed between the mounting member 220 and the locking member 26, and is used to press and fix the mounting member 220 to the mounting surface 23 of the valve body 21 when the locking member 26 is in a screwed state. The positioning structure can be various, for example, the positioning structure comprises a positioning groove formed on the locking member 26 and a positioning protrusion formed on the mounting member 220. The positioning groove and the positioning protrusion are shaped matched along the rotation axis S to axially position the mounting member 220 on the valve body 21. In addition, the valve body 21 further comprises a stepped portion, and the mounting surface 23 forms a stepped surface on the stepped portion. The locking member 26 can be sleeved on the outer periphery of the stepped portion to radially position the mounting member 220 on the valve body 21. The radial limiting member 280 is located on the side of the cavity 240 close to the valve core 22, and is used to be connected with the valve core 22. The outer peripheral surface of the radial limiting member 280 is limited matched with the inner peripheral surface of the hollow space 221 formed by the mounting member 220. The radial limiting member 280 limits the position between the valve core 22 and the mounting groove 24 in the radial direction. The radial limiting member 280 is connected with one end of the moving shaft 291, and the other end of the moving shaft 291 is used to be connected with the valve core 22. One end of the bellows 292 is sealingly connected with the radial limiting member 280, and the other end of the bellows 292 is used to be sealingly connected with the mounting surface 23 of the valve body 21.

[0091] In the first example, the central angle corresponding to the arc length of the arc-shaped support portion 244 is greater than 180°. The width of the second opening 262 in the circumferential direction of the arc-shaped support portion 244 can decrease in the direction from the outside to the inside, that is, the second opening 262 is similar to a horn-shaped opening.

[0092] Figure 11 and Figure 12A valve 20 according to another example of the present disclosure is shown. The difference from the first example is that in the valve assembly 200 of the valve 20 of this example, the movable member 251 specifically comprises a rolling body 257. The first cavity wall 241 and the two surfaces of the connecting member 252 opposite to each other are each provided with a limiting groove 258. The rolling body 257 is rollingly arranged between the limiting grooves 258 on the two surfaces.

[0093] Figure 13 and Figure 14 A valve 20 according to another example of the present disclosure is shown. The difference from the first example is that in the valve assembly 200 of the valve 20 of this example, the central angle corresponding to the arc length of the arc-shaped support portion 244 is equal to 180°, and the arc-shaped support portion 244 is provided with a recessed portion 245 which is in shape cooperation with the connecting member 252 of the movable connecting portion 250.

[0094] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present disclosure, however the present disclosure is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the present disclosure.

Claims

1. A valve assembly, characterized by The transmission assembly and the connecting assembly are connected to the valve core through the connecting assembly to convert the power applied on the transmission assembly around the rotation axis into linear power along the rotation axis and transmit the linear power to the valve core. The connecting assembly includes a cavity with an opening part and a movable connecting part, wherein the cavity is connected to the transmission assembly, the movable connecting part is arranged in the cavity and is connected to the valve core through the opening part and can enter and exit the cavity through the opening part; the cavity is arranged to rotate relative to the movable connecting part around the rotation axis and limit the relative movement between the movable connecting part and the cavity along the rotation axis.

2. The valve assembly according to claim 1, wherein The cavity includes a first cavity wall, a second cavity wall and a third cavity wall constituting the internal space of the cavity, wherein the first cavity wall and the second cavity wall are arranged in sequence and relative to each other along the rotation axis and in the direction close to the valve core, and the third cavity wall is connected between the first cavity wall and the second cavity wall and is arranged around the rotation axis; the movable connecting part is limited and matched with the first cavity wall and the second cavity wall, respectively; The opening part includes a first opening arranged on the third cavity wall and a second opening arranged on the second cavity wall, and the movable connecting part can enter and exit the cavity through the first opening and can be connected to the valve core through the second opening. The second cavity wall includes an arc-shaped support part extending in the circumferential direction, and the arc-shaped support part surrounds the second opening; 3. The valve assembly of claim 2, wherein, The projection of the movable connecting part on the cross section perpendicular to the rotation axis partially overlaps the projection of the arc-shaped support part on the cross section and partially overlaps the projection of the second opening on the cross section. The central angle corresponding to the arc length of the arc-shaped support part is greater than or equal to 180°.

4. The valve assembly of claim 3, wherein, 5. The valve assembly according to claim 2, wherein The movable connecting part includes a movable element and a connecting element, and the movable element is located between the first cavity wall and the connecting element to enable the relative rotation of the first cavity wall and the connecting element around the rotation axis; The connecting element can be connected to the valve core through the second opening. In the direction parallel to the rotation axis, the first opening and the movable element are at least partially staggered.

6. The valve assembly of claim 5, wherein, 7. The valve assembly according to claim 5, wherein The movable element includes a rotating bearing.

8. The valve assembly according to claim 5, wherein The movable element includes a rolling body, and The first cavity wall and the connecting element are provided with limiting grooves on the two surfaces opposite to each other, and the rolling body is rollingly arranged between the limiting grooves on the two surfaces. The installation element, the connecting rod and the radial limiting element are further included; 9. The valve assembly of any one of claims 1 to 8, wherein, The installation element can be connected to the valve body, and the transmission assembly cooperates with the installation element to convert the power applied on the transmission assembly around the rotation axis into linear power along the rotation axis. ​ The mounting member has a hollow space through the mounting member along the rotation axis, and the connecting assembly, the connecting rod and the radial limiting member are located in the hollow space; The radial limiting member is located on the side of the cavity close to the valve core, and is used for connecting with the valve core, and the outer peripheral surface of the radial limiting member is limitedly matched with the inner peripheral surface of the mounting member to form the hollow space; One end of the connecting rod is connected with the radial limiting member, and the other end of the connecting rod is connected with the movable connecting part through the opening part.

10. The valve assembly of claim 9, wherein, The valve assembly further comprises a bellows assembly located in the hollow space, and the bellows assembly comprises a moving shaft and a bellows sleeved on the moving shaft; One end of the radial limiting member is connected with the moving shaft, and the other end of the moving shaft is used for connecting with the valve core; one end of the bellows is sealingly connected with the radial limiting member, and the other end of the bellows is used for sealingly connecting with the mounting surface of the valve body.

11. The valve assembly according to claim 9, wherein The transmission assembly comprises a valve stem provided with a first external thread; The mounting member has a hollow space through the mounting member along the rotation axis, and the valve stem is coaxially arranged with the rotation axis, and one end of the valve stem extends into the hollow space and is connected with the cavity; the mounting member, which forms the inner peripheral surface of the hollow space, is provided with a first internal thread matched with the first external thread, and when the valve stem is subjected to a power of rotating around the rotation axis, the valve stem moves along the rotation axis relative to the mounting member, and simultaneously drives the cavity, the movable connecting part and the valve core to move along the rotation axis while driving the cavity to rotate relative to the movable connecting part.

12. A valve characterized by Comprise: a valve body having a mounting surface, and a mounting groove is arranged on the mounting surface, and a valve port is formed on the groove bottom surface of the mounting groove; a valve core located at least partially in the mounting groove; and the valve assembly according to any one of claims 1 to 11, which is connected with the valve core and is used for driving the valve core to move along the rotation axis to open or close the valve port.

13. The valve according to claim 12, wherein the valve further comprises a locking member in the form of a ring and provided with a second internal thread on the inner periphery, and the valve body is provided with a second external thread on the outer periphery, and the second external thread is matched with the second internal thread; the valve assembly further comprises a mounting member capable of being connected to the valve body, and the transmission assembly is matched with the mounting member to convert the power of rotating around the rotation axis applied on the transmission assembly into linear power along the rotation axis; the locking member is sleeved on the outer periphery of the mounting member, and a positioning structure is formed between the mounting member and the locking member to press and fix the mounting member to the mounting surface of the valve body when the locking member is in a screwed state. ​

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