Pinch valve

Abstract

The utility model discloses a pinch valve which comprises a valve body, a pressure head, a pipe seat and an actuator. The valve body is provided with a containing cavity and a mounting opening. The pressing head is movably arranged in the valve body, and the pressing head can be controlled to move towards the containing cavity so as to compress the guide pipe contained in the containing cavity. The tube seat is arranged in the containing cavity and comprises a tube groove, the tube groove can be matched with the containing cavity to form a limiting space for limiting the catheter in the radial direction of the catheter, and the tube seat can be controlled to rotate around the limiting space. The actuator comprises a driving rod used for driving the pressing head to move. When the pipe base rotates to the first working position, the pipe base blocks communication between the containing cavity and the mounting opening. And when the pipe seat rotates to the second working position, the notch of the pipe groove faces the mounting opening, so that the guide pipe moves between the accommodating cavity and the mounting opening. The communication state of the containing cavity and the mounting opening in the valve body can be changed by rotating the pipe seat, so that the guide pipe is convenient to mount and dismount, the difficulty of mounting and dismounting the guide pipe is reduced, and the efficiency of mounting and dismounting the guide pipe is improved.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a pinch valve. Background Technology

[0002] A pinch valve is a fluid control device that precisely controls fluid flow and is now widely used in various industries. Pinch valves primarily utilize an actuator to drive a pressure head to squeeze a conduit, thereby altering the fluid flow within the conduit.

[0003] However, despite the proven efficiency and reliability of pinch valves in many applications, existing technologies still have some significant limitations and inconveniences. In particular, pinch valves restrict the radial movement of the conduit, so a limiting structure is installed on the valve body to restrict the radial movement of the conduit. However, the limiting structure makes the installation and removal of the conduit cumbersome and not conducive to the rapid installation and removal of the conduit.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a clamp valve that solves the problem that the structure of existing clamp valves is not conducive to the quick installation and disassembly of conduits.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides a pinch valve, which includes a valve body, a pressure head, a pipe seat, and an actuator. The valve body has a receiving cavity for receiving a conduit and an installation port communicating with the receiving cavity, the installation port being used to expose the receiving cavity. The pressure head is movably disposed within the valve body and can be controllably moved toward the receiving cavity to compress the conduit contained within the receiving cavity. The pipe seat is disposed within the receiving cavity and includes a pipe groove, which can cooperate with the receiving cavity to form a limiting space that limits the conduit radially, and the pipe seat can be controllably rotated around the limiting space. The actuator includes a drive rod for driving the pressure head to move. When the pipe seat rotates to a first working position, the pipe seat blocks the communication between the receiving cavity and the installation port. When the pipe seat rotates to a second working position, the opening of the pipe groove faces the installation port, allowing the conduit to move between the receiving cavity and the installation port.

[0007] In one or more embodiments of the present invention, the valve body includes a clearance port communicating with the receiving cavity, and the pinch valve also includes an operating member connected to the pipe seat, the operating member extending to the outside of the valve body via the clearance port.

[0008] In one or more embodiments of this utility model, the valve body includes a first locking groove and a second locking groove that communicate with the clearance port.

[0009] In one or more embodiments of this utility model, when the tube seat is rotated to the first working position, the operating member can be controlled to lock in the first locking groove to restrict the rotation of the tube seat.

[0010] In one or more embodiments of this utility model, when the tube seat is rotated to the second working position, the operating member can be controlled to lock in the second locking groove to restrict the rotation of the tube seat.

[0011] In one or more embodiments of this utility model, the first locking groove and the second locking groove are recessed from the outer wall of the valve body along the radial direction of the limiting space.

[0012] In one or more embodiments of this utility model, the tube seat includes an insertion hole recessed in the radial direction along the limiting space, and a third locking groove is recessed on the wall of the insertion hole.

[0013] In one or more embodiments of this utility model, the operating member includes a plug portion inserted into a socket and an operating part that can be controlled to lock and engage with a first locking groove and a second locking groove, wherein the plug portion is provided with a radially protruding retaining member.

[0014] In one or more embodiments of this utility model, when the operating part moves into the first locking groove or the second locking groove along the insertion direction, the retaining member can be locked in the third locking groove to restrict the movement of the insertion part along the insertion and removal direction.

[0015] In one or more embodiments of this utility model, when the operating part moves out of the first locking groove or the second locking groove in the pulling direction, the retaining member disengages from the third locking groove.

[0016] In one or more embodiments of this utility model, in the direction of the third locking groove near the operating part, the wall of the insertion hole is recessed with an unlocking groove that communicates with the third locking groove, and the depth of the unlocking groove is less than the depth of the third locking groove.

[0017] In one or more embodiments of this utility model, in the direction of the third locking groove near the operating part, the wall of the insertion hole is recessed with a fourth locking groove that communicates with the unlocking groove, and the depth of the unlocking groove is less than the depth of the fourth locking groove.

[0018] In one or more embodiments of this utility model, when the retaining member is locked in the fourth locking groove, the insertion part can be prevented from moving out of the insertion hole.

[0019] In one or more embodiments of this utility model, the insertion portion is recessed in the circumferential direction with a receiving groove, and the retaining member is at least partially received in the receiving groove.

[0020] In one or more embodiments of this utility model, the retaining member is a C-type spring.

[0021] In one or more embodiments of this utility model, one of the valve body and the pipe seat is provided with a first arc-shaped guide groove, and the other is provided with a first arc-shaped guide portion that slides within the first arc-shaped guide groove.

[0022] In one or more embodiments of this utility model, the groove opening of the first arc-shaped guide groove is parallel to the axial direction of the limiting space.

[0023] In one or more embodiments of this utility model, the tube seat is recessed on the side away from the tube groove, with an avoidance groove surrounding the limiting space.

[0024] In one or more embodiments of this utility model, when the tube seat switches between a first working position and a second working position, the clearance groove is used to avoid the pressure head.

[0025] In one or more embodiments of this utility model, a stop surface is formed in the receiving cavity to abut against the pipe seat in the axial direction of the limiting space, and the pipe clamp valve also includes a limiting member disposed opposite to the stop surface, and the pipe seat is disposed between the stop surface and the limiting member.

[0026] In one or more embodiments of the present invention, the limiting member includes an extension extending into the receiving cavity along the axial direction of the limiting space, and a second arc-shaped guide groove is formed between the extension and the circumferential cavity wall of the receiving cavity. The tube seat is provided with a second arc-shaped guide portion that slides within the second arc-shaped guide groove.

[0027] In one or more embodiments of this utility model, the actuator further includes a transmission box, a lead screw passing through the transmission box, and a lead screw nut sleeved on the lead screw. The lead screw nut is fixedly connected to the drive rod. The actuator also includes an anti-rotation structure that restricts the rotation of the drive rod or the lead screw nut, so that the lead screw nut can only move in a straight line under the drive of the lead screw.

[0028] In one or more embodiments of this utility model, the anti-rotation structure includes a first anti-rotation groove provided on the circumferential inner wall of the transmission box, a second anti-rotation groove provided on the circumferential outer wall of the drive rod, and an anti-rotation member accommodated in the first and second anti-rotation grooves. In the axial direction of the drive rod, the length of the first anti-rotation groove is greater than the length of the anti-rotation member, and the length of the second anti-rotation groove is equal to the length of the anti-rotation member.

[0029] In one or more embodiments of this utility model, the anti-rotation member is constructed as a cylindrical structure, and the axial direction of the anti-rotation member is parallel to the axial direction of the drive rod.

[0030] Compared with the prior art, this utility model can change the communication state between the receiving cavity and the installation port on the valve body by rotating the tube seat, thereby facilitating the installation and disassembly of the conduit, reducing the difficulty of installing and disassembling the conduit, and improving the efficiency of installing and disassembling the conduit. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of the pinch valve in one embodiment of the present invention;

[0033] Figure 2 This is a cross-sectional view of the pinch valve in one embodiment of the present invention;

[0034] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0035] Figure 4 This is an exploded view of the pinch valve in one embodiment of the present invention;

[0036] Figure 5 This is an exploded structural diagram of the valve body, pipe seat, operating component, and limiting component in one embodiment of the present invention.

[0037] Figure 6 This is a cross-sectional structural diagram of the valve body and the limiting member in one embodiment of the present invention;

[0038] Figure 7 This is a cross-sectional structural diagram of the valve body in one embodiment of the present invention;

[0039] Figure 8 This is a three-dimensional structural view of the tube seat and operating component in one embodiment of the present invention;

[0040] Figure 9 This is a three-dimensional structural view of the limiting member in one embodiment of the present utility model;

[0041] Figure 10 This is a three-dimensional structural diagram of the transmission box in one embodiment of the present invention.

[0042] Key reference numerals in the attached drawings: 1. Valve body; 11. Receiving cavity; 12. Mounting port; 13. Clearance port; 14. First locking groove; 15. Second locking groove; 16. Stop surface; 17. First arc-shaped guide groove; 18. Second arc-shaped guide groove; 2. Pressure head; 3. Pipe seat; 31. Pipe groove; 32. Insertion hole; 33. Third locking groove; 34. Unlocking groove; 35. Fourth locking groove; 36. First arc-shaped guide part; 37. Second arc-shaped guide part; 38. Clearance groove; 4. Actuator; 41. Transmission box; 411. First anti-rotation groove; 42. Drive rod; 421. Second anti-rotation groove; 43. Lead screw; 44. Lead screw nut; 45. Anti-rotation component; 46. Motor; 47. Encoder; 5. Operating component; 51. Operating part; 52. Insertion part; 521. Receiving groove; 6. Holding component; 7. Limiting component; 71. Extension part. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0044] In the description of this utility model, it should be understood that the terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Furthermore, the terms "second" and "first" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "second" or "first" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the field of modern fluid control technology, pinch valves, as an important fluid control device, are widely used in various industries such as medical, biotechnology, chemical, and food processing. These fields have extremely high requirements for the accuracy, reliability, and ease of operation of fluid control. However, through analysis of existing pinch valves, the inventors found that although existing pinch valves can meet the basic needs of fluid control to a certain extent, they still have many shortcomings and limitations in terms of tubing assembly and disassembly, as well as tubing flow control. In particular, the traditional connection method between the valve body and the tubing seat cannot meet the requirements for rapid assembly and disassembly of the tubing, resulting in a significant amount of time being spent on these processes.

[0047] Based on the above problems, this utility model proposes an improved clamp valve, aiming to solve the problem of the great difficulty in assembling and disassembling conduits in the prior art. The core idea of ​​this utility model is to improve the connection method between the valve body and the pipe seat, so that the pipe seat can have different working states to facilitate the operator's assembly and disassembly of the conduit.

[0048] In one embodiment, reference is made to Figures 1 to 7 As shown, this utility model provides a pinch valve, which includes a valve body 1, a pressure head 2, a pipe seat 3, and an actuator 4.

[0049] Specifically, the valve body 1 has a receiving cavity 11 for accommodating a conduit and an installation port 12 communicating with the receiving cavity 11. The installation port 12 penetrates the outer wall of the valve body 1 and communicates with the external space of the valve body 1, thereby exposing the receiving cavity 11 through the installation port 12, facilitating the installation of the conduit into the receiving cavity 11. A pressure head 2 is movably disposed within the valve body 1 and can be controlled to move toward the receiving cavity 11 to compress the conduit contained within the receiving cavity 11, thereby controlling the fluid flow rate within the conduit. A pipe seat 3 is disposed within the receiving cavity 11 and includes a pipe groove 31 for accommodating the conduit. The pipe groove 31 cooperates with the receiving cavity 11 to form a limiting space that restricts the radial movement of the conduit. The shape of the limiting space is approximately adapted to the conduit and can be considered as a roughly pipe-shaped space. The pipe seat 3 can be controlled to rotate around the limiting space, that is, rotate around the central axis of the limiting space. When a conduit is installed within the limiting space, the rotation of the pipe seat 3 around the limiting space can also be understood as the rotation of the pipe seat 3 around the conduit. Actuator 4 includes a drive rod 42 for driving the pressure head 2 to move.

[0050] According to the above structural design, since the tube seat 3 is rotatable, when the tube seat 3 is in normal working condition, the tube seat 3 rotates to the first working position. The positional relationship between the tube seat 3, the pressure head 2, and the mounting port 12 when the tube seat 3 rotates to the first working position can be referred to... Figure 2As shown, at this time, the tube groove 31 faces the pressure head 2, and the tube seat 3 blocks the connection between the receiving cavity 11 and the mounting port 12. When the pressure head 2 squeezes the conduit, the tube groove 31 can provide the conduit with a supporting force opposite to the squeezing force, preventing the conduit from moving radially and ensuring that the pressure head 2 can squeeze the conduit normally.

[0051] When it is necessary to install or remove the conduit, the tube seat 3 rotates to the second working position. At this time, the groove of the tube groove 31 faces the mounting port 12, and the tube groove 31 is connected to the mounting port 12 so that the conduit can enter the receiving cavity 11 through the mounting port 12 or move out of the receiving cavity 11 through the mounting port 12. This reduces the difficulty of installing and removing the conduit and improves the efficiency of installing and removing the conduit.

[0052] In one embodiment, reference is made to Figures 2 to 7 As shown, in order to facilitate the operator to rotate the pipe seat 3, the clamp valve also includes an operating element 5 connected to the pipe seat 3. The operating element 5 extends to the outside of the valve body 1, so that the operator can apply torque to the pipe seat 3 through the operating element 5.

[0053] Furthermore, during the synchronous rotation of the operating component 5 with the pipe seat 3, to avoid interference between the valve body 1 and the operating component 5, a clearance port 13 communicating with the receiving cavity 11 is provided on the valve body 1. The clearance port 13 is arranged around the guide tube, and on a plane perpendicular to the axial direction of the valve body 1, the vertical projections of the mounting port 12 and the clearance port 13 are approximately cross-shaped. The operating component 5 extends to the outside of the valve body 1 through the clearance port 13. When the operating component 5 rotates synchronously with the pipe seat 3, the portion of the operating component 5 located within the clearance port 13 can rotate around the guide tube within the clearance port 13, avoiding interference between the valve body 1 and the operating component 5, allowing the operator to smoothly control the operating component 5.

[0054] Considering that the operating element 5 can easily drive the tube seat 3 to rotate under the action of external force or its own gravity, the position of the operating element 5 needs to be locked when the tube seat 3 rotates to the first working position and the second working position to prevent the operating element 5 from moving and to prevent the operating element 5 from accidentally driving the tube seat 3 to rotate.

[0055] To address the above problems, in one embodiment, reference is made to... Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the valve body 1 is provided with a first locking groove 14 and a second locking groove 15. The first locking groove 14 and the second locking groove 15 are connected to different areas of the clearance port 13. The first locking groove 14 and the second locking groove 15 are used to lock the position of the operating member 5 to prevent the operating member 5 from moving.

[0056] Specifically, the position of the first locking groove 14 corresponds to the first working position of the tube seat 3. When the tube seat 3 rotates to the first working position, the operating member 5 can be controlled and locked in the first locking groove 14 to restrict the rotation of the tube seat 3. The position of the second locking groove 15 corresponds to the second working position of the tube seat 3. When the tube seat 3 rotates to the second working position, the operating member 5 can be controlled and locked in the second locking groove 15 to restrict the rotation of the tube seat 3.

[0057] Furthermore, in order to facilitate the movement of the operating element 5 into and out of the first locking groove 14 and the second locking groove 15, it is possible to use a method of insertion and removal along the radial direction of the conduit to control the locking and unlocking states of the operating element 5.

[0058] Based on the aforementioned control mechanism 5, the first locking groove 14 and the second locking groove 15 are recessed from the outer wall of the valve body 1 along the radial direction of the limiting space. The pipe seat 3 has a recessed insertion hole 32 along the radial direction of the limiting space, and a third locking groove 33 is recessed on the wall of the insertion hole 32. The control mechanism 5 includes a plug-in portion 52 and an operating portion 51. The plug-in portion 52 is inserted into the insertion hole 32, and the operating portion 51 can be controllably locked with the first locking groove 14 and the second locking groove 15. The plug-in portion 52 is provided with a radially protruding retaining member 6.

[0059] Based on the above structural design, referring to Figure 3 As shown, when the tube seat 3 is rotated to the first working position or the second working position, the operator presses the operating part 5 along the insertion direction. The operating part 51 can move into the first locking groove 14 or the second locking groove 15 along the insertion direction. The retaining part 6 on the insertion part 52 can be locked in the third locking groove 33 of the insertion hole 32 to restrict the movement of the insertion part 52 along the insertion and removal direction, thereby restricting the operating part 51 from moving out of the first locking groove 14, and preventing the operating part 5 from being accidentally driven to rotate by external force or its own gravity.

[0060] When it is necessary to adjust the working position of the tube seat 3, the operating member 5 can be pulled in the pulling direction to make the retaining member 6 move out of the third locking groove 33. At the same time, the operating part 51 moves out of the first locking groove 14 or the second locking groove 15. The operating member 5 switches from the locked state to the unlocked state, and the operator can normally operate the operating member 5 to drive the tube seat 3 to rotate.

[0061] During the insertion and removal of the inserting / removing operation member 5, in order to appropriately reduce the difficulty of the retaining member 6 engaging and disengaging from the third locking groove 33, in one embodiment, referring to... Figure 3As shown, in the direction of the third locking groove 33 near the operating part 51, the wall of the insertion hole 32 is recessed with an unlocking groove 34 that communicates with the third locking groove 33. The depth of the unlocking groove 34 is less than the depth of the third locking groove 33. The unlocking groove 34 effectively increases the diameter of the insertion hole 32 in its area. An unlocking channel is formed between the bottom of the unlocking groove 34 and the peripheral wall of the insertion part 52. The interference between the retaining member 6 and the insertion hole 32 in the unlocking channel is small, making it easier for the retaining member 6 to engage or disengage from the third locking groove 33.

[0062] In one embodiment, reference is made to Figure 3 As shown, in the direction of the third locking groove 33 near the operating part 51, the wall of the insertion hole 32 is recessed with a fourth locking groove 35 that communicates with the unlocking groove 34. The depth of the unlocking groove 34 is less than the depth of the fourth locking groove 35. When the retaining member 6 is engaged in the fourth locking groove 35, the fourth locking groove 35 can restrict the insertion part 52 from moving out of the insertion hole 32, so that the insertion part 52 can be stably retained in the insertion hole 32, preventing the operating member 5 from detaching from the tube seat 3 body.

[0063] In one embodiment, reference is made to Figure 3 and Figure 5 As shown, the retaining member 6 is a C-type spring, and the insertion part 52 is recessed in the circumferential direction with a receiving groove 521. The retaining member 6 is at least partially received in the receiving groove 521.

[0064] In one embodiment, reference is made to Figures 5 to 8 As shown, the receiving cavity 11 inside the valve body 1 is constructed in a cylindrical shape, and the pipe seat 3 is constructed in a semi-annular structure with a cross-section of approximately C-shaped.

[0065] The groove wall of the tube groove 31 forms an inner arc surface for contacting the conduit, and the side of the tube seat 3 corresponding to the inner arc surface forms an outer arc surface that contacts the cavity wall of the receiving cavity 11, so that the tube seat 3 body can rotate relatively smoothly around the conduit.

[0066] In one embodiment, reference is made to Figures 6 to 8 As shown, a first arc-shaped guide groove 17 is formed in the receiving cavity 11 of the valve body 1. The first arc-shaped guide groove 17 is arranged around the conduit in the receiving cavity 11. The tube seat 3 is provided with a first arc-shaped guide portion 36, which slides within the first arc-shaped guide groove 17. When the tube seat 3 rotates, the first arc-shaped guide portion 36 slides synchronously within the first arc-shaped guide groove 17, thus restricting the rotation path of the tube seat 3.

[0067] It should be noted that the positions of the first arc-shaped guide groove 17 and the first arc-shaped guide portion 36 in the above embodiments are conventional choices in actual applications. For those skilled in the art, without departing from the technical principles of this application, if the positions of the first arc-shaped guide groove 17 and the first arc-shaped guide portion 36 are interchanged, that is, the first arc-shaped guide groove 17 is disposed on the tube seat 3 and the first arc-shaped guide portion 36 is disposed in the receiving cavity 11, it should also be considered as the scope of protection of this application.

[0068] Furthermore, when installing the pipe seat 3, in order to facilitate the insertion of the first arc-shaped guide part 36 into the first arc-shaped guide groove 17, the groove opening of the first arc-shaped guide groove 17 is parallel to the axial direction of the limiting space. The operator can directly insert the first arc-shaped guide part 36 into the first arc-shaped guide groove 17 along the axial direction of the limiting space.

[0069] In one embodiment, reference is made to Figure 6 As shown, a stop surface 16 is formed in the receiving cavity 11 to abut against the tube seat 3 in the axial direction of the limiting space. The clamp valve also includes a limiting member 7 disposed opposite to the stop surface 16. The tube seat 3 is disposed between the stop surface 16 and the limiting member 7 to limit the axial position of the tube seat 3 and prevent the tube seat 3 from moving in the axial direction of the limiting space.

[0070] Furthermore, the limiting member 7 includes an extension 71, which extends into the receiving cavity 11 along the axial direction of the limiting space. A second arc-shaped guide groove 18 is formed between the extension 71 and the circumferential cavity wall of the receiving cavity 11. The tube seat 3 is provided with a second arc-shaped guide portion 37 that slides within the second arc-shaped guide groove 18.

[0071] Considering that when the operating member 5 moves to the area where the clearance port 13 intersects with the mounting port 12, the operating member 5 may tend to move towards the mounting port 12 under the action of external force. At this time, the operating member 5 is more likely to drive the pipe seat 3 away from the conduit. Therefore, the extension 71 can be set only in the area opposite to the mounting port 12. That is, when the operating member 5 moves to the area where the clearance port 13 intersects with the mounting port 12, the second arc-shaped guide part 37 on the pipe seat 3 of the extension 71 is exactly in the second arc-shaped guide groove 18, and the position of the pipe seat 3 is stabilized by the second arc-shaped guide groove 18.

[0072] In one embodiment, reference is made to Figure 2 and Figure 8 As shown, the tube seat 3 has a recessed clearance groove 38 on the side away from the tube groove 31, which surrounds the limiting space. When the tube seat 3 switches between the first working position and the second working position, if the pressure head 2 is relatively close to the tube seat 3, the clearance groove 38 can be used to avoid the pressure head 2 and prevent interference between the pressure head 2 and the tube seat 3.

[0073] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 10 As shown, the actuator 4 also includes a transmission box 41, a lead screw 43, a lead screw nut 44, and an anti-rotation structure. The lead screw 43 passes through the transmission box 41, the lead screw nut 44 is sleeved on the lead screw 43 and fixedly connected to the drive rod 42, and the anti-rotation structure is connected to the lead screw nut 44 or the drive rod 42 to restrict the rotation of the lead screw nut 44 and the drive rod 42, so that the lead screw nut 44 can only move linearly under the drive of the lead screw 43, and thus the lead screw nut 44 can only drive the drive rod 42 to move linearly to drive the pressure head 2 to approach or move away from the tube seat 3.

[0074] Furthermore, the anti-rotation structure includes a first anti-rotation groove 411, a second anti-rotation groove 421, and an anti-rotation element 45. The first anti-rotation groove 411 is located on the circumferential inner wall of the transmission housing 41, and the second anti-rotation groove 421 is located on the circumferential outer wall of the drive rod 42. A portion of the anti-rotation element 45 is accommodated in the first anti-rotation groove 411, and another portion is accommodated in the second anti-rotation groove 421. In the axial direction of the drive rod 42, the length of the first anti-rotation groove 411 is greater than the length of the anti-rotation element 45. When the drive rod 42 moves linearly in its axial direction, the anti-rotation element 45 can move linearly within the first anti-rotation groove 411, thus stably restricting the rotation of the drive rod 42 and the lead screw nut 44.

[0075] Optionally, in the axial direction of the drive rod 42, the length of the second anti-rotation groove 421 is equal to the length of the anti-rotation member 45, thereby preventing the anti-rotation member 45 and the drive rod 42 from moving relative to each other in the axial direction.

[0076] Optionally, the anti-rotation member 45 is constructed as a cylindrical structure, and the axial direction of the anti-rotation member 45 is parallel to the axial direction of the drive rod 42.

[0077] In one embodiment, reference is made to Figure 1 and Figure 2 As shown, actuator 4 also includes motor 46 and encoder 47. Motor 46 is used to drive lead screw 43 to rotate. Encoder 47 is electrically connected to motor 46 and is used to measure motion information such as rotation angle, speed and direction of motor 46. Encoder 47 can convert the mechanical motion of the output shaft of motor 46 into electrical signals. These electrical signals can be read and processed by motor 46 control system, thereby realizing precise control of motor 46, which in turn enables motor 46 to move pressure head 2 precisely to any position within the stroke range.

[0078] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamp tube valve characterized by, The pinch valve comprises: a valve body (1) having a receiving cavity (11) for receiving a pipe and a mounting port (12) communicating with the receiving cavity (11) and exposing the receiving cavity (11); a pressure head (2) movably arranged in the valve body (1) and controllably movable towards the receiving cavity (11) to compress the pipe received in the receiving cavity (11); a pipe seat (3) arranged in the receiving cavity (11) and comprising a pipe slot (31) cooperating with the receiving cavity (11) to form a limiting space for limiting the pipe in the radial direction of the pipe, the pipe seat (3) being controllably rotatable around the limiting space; an actuator (4) comprising a driving rod (42) for driving the pressure head (2) to move; wherein, when the pipe seat (3) is rotated to a first working position, the pipe seat (3) blocks the communication between the receiving cavity (11) and the mounting port (12); when the pipe seat (3) is rotated to a second working position, the slot opening of the pipe slot (31) faces the mounting port (12) to allow the pipe to move between the receiving cavity (11) and the mounting port (12).

2. The clamp valve of claim 1, wherein The valve body (1) comprises an avoiding port (13) communicating with the receiving cavity (11), and the pinch valve further comprises an operating member (5) connected to the pipe seat (3), the operating member (5) extending to the outside of the valve body (1) through the avoiding port (13).

3. The clamp valve of claim 2, wherein, The valve body (1) comprises a first locking groove (14) and a second locking groove (15) communicating with the avoiding port (13); when the pipe seat (3) is rotated to the first working position, the operating member (5) is controllably locked in the first locking groove (14) to limit the rotation of the pipe seat (3); when the pipe seat (3) is rotated to the second working position, the operating member (5) is controllably locked in the second locking groove (15) to limit the rotation of the pipe seat (3).

4. The clamp valve of claim 3, wherein The first locking groove (14) and the second locking groove (15) are recessed from the outer wall of the valve body (1) in the radial direction of the limiting space; The pipe seat (3) comprises a insertion hole (32) recessed in the radial direction of the limiting space, and a third locking groove (33) is recessed on the hole wall of the insertion hole (32); The operating member (5) comprises an insertion part (52) inserted into the insertion hole (32) and an operating part (51) controllably locked with the first locking groove (14) and the second locking groove (15), and a clamping member (6) radially protruding from the insertion part (52); When the operating part (51) is moved into the first locking groove (14) or the second locking groove (15) in the insertion direction, the clamping member (6) is locked in the third locking groove (33) to limit the movement of the insertion part (52) in the insertion and extraction direction; When the operating part (51) is moved out of the first locking groove (14) or the second locking groove (15) in the extraction direction, the clamping member (6) is disengaged from the third locking groove (33).

5. The clamp valve of claim 4, wherein, An unlocking groove (34) is concavely arranged on the hole wall of the insertion hole (32) and communicates with the third locking groove (33) in the direction in which the third locking groove (33) is close to the operating part (51), and the depth of the unlocking groove (34) is less than that of the third locking groove (33).

6. The clamp valve of claim 5, wherein, A fourth locking groove (35) is concavely arranged on the hole wall of the insertion hole (32) and communicates with the unlocking groove (34) in the direction in which the third locking groove (33) is close to the operating part (51), and the depth of the fourth locking groove (35) is greater than that of the unlocking groove (34). When the clamping piece (6) is clamped and locked in the fourth locking groove (35), the plug-in part (52) can be limited to move out of the insertion hole (32).

7. The pinch valve of claim 4, wherein, A containing groove (521) is concavely arranged on the circumference of the plug-in part (52), and the clamping piece (6) is at least partially contained in the containing groove (521).

8. The clamp valve of claim 4, wherein, The clamping piece (6) is a C-shaped spring.

9. The pinch valve of claim 1, wherein, One of the valve body (1) and the pipe seat (3) is provided with a first arc-shaped guide groove (17), and the other is provided with a first arc-shaped guide part (36) which is slidingly fitted in the first arc-shaped guide groove (17).

10. The clamp valve of claim 9, wherein, The opening direction of the first arc-shaped guide groove (17) is parallel to the axial direction of the limiting space.

11. The pinch valve of claim 1, wherein, The pipe seat (3) is concavely arranged with an avoiding groove (38) on the side away from the pipe groove (31) and surrounding the limiting space. When the pipe seat (3) is switched between the first working position and the second working position, the avoiding groove (38) is used for avoiding the pressure head (2).

12. The pinch valve of claim 1, wherein, The containing cavity (11) is formed with a stop surface (16) which abuts against the pipe seat (3) along the axial direction of the limiting space, and the pipe seat (3) is arranged between the stop surface (16) and a limiting piece (7) which is arranged opposite to the stop surface (16).

13. The clamp valve of claim 12, wherein, The limiting piece (7) comprises an extension part (71) which extends into the containing cavity (11) along the axial direction of the limiting space, and a second arc-shaped guide groove (18) is formed between the extension part (71) and the circumferential cavity wall of the containing cavity (11), and the pipe seat (3) is provided with a second arc-shaped guide part (37) which is slidingly fitted in the second arc-shaped guide groove (18).

14. The pinch valve of claim 1, wherein, The actuator (4) further comprises a transmission box (41), a lead screw (43) penetrating in the transmission box (41), and a lead screw nut (44) sleeved on the lead screw (43), the lead screw nut (44) is fixedly connected with the driving rod (42), and the actuator (4) further comprises a rotation limiting structure for limiting the rotation of the driving rod (42) or the lead screw nut (44), so that the lead screw nut (44) can only move linearly under the driving of the lead screw (43).

15. The clamp valve of claim 14, wherein, The rotation-stopping structure comprises a first rotation-stopping groove (411) arranged on a circumferential inner wall of the transmission box (41), a second rotation-stopping groove (421) arranged on a circumferential outer wall of the driving rod (42), and a rotation-stopping piece (45) accommodated in the first rotation-stopping groove (411) and the second rotation-stopping groove (421), wherein, in the axial direction of the driving rod (42), the length of the first rotation-stopping groove (411) is greater than the length of the rotation-stopping piece (45), and the length of the second rotation-stopping groove (421) is equal to the length of the rotation-stopping piece (45).

16. The clamp valve of claim 15, wherein, The rotation-stopping piece (45) is configured as a cylindrical structure, and the axial direction of the rotation-stopping piece (45) is parallel to the axial direction of the driving rod (42).

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