Pinch valve and smoke evacuation system

Abstract

The application relates to a clamp pipe valve and a smoke exhaust system, wherein the clamp pipe valve comprises a linear actuator, a containing piece, a limiting piece, a pressing piece and an elastic piece. The linear actuator comprises a seat body, an output shaft and a pushing piece. The output shaft can move linearly relative to the seat body in a first direction. The pushing piece comprises a positive pushing part and a reverse pushing part which are fixedly connected to the output shaft. The containing piece is fixed to the seat body and is provided with a pipe containing groove for containing a smoke exhaust pipe. The limiting piece is fixed to the containing piece. The limiting piece, the pipe containing groove and the seat body are sequentially distributed in the first direction. The pressing piece is movably arranged on the containing piece in the first direction and is provided with a pressing head and a reverse pushing part. The elastic piece is clamped between the pressing piece and the positive pushing part. The limiting piece, the pressing head, the elastic piece and the positive pushing part are sequentially distributed in the first direction. The reverse pushing part is located between the reverse pushing part and the seat body and faces the reverse pushing part in the first direction. The clamp pipe valve is beneficial to guarantee the safety of an operation.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to clamp valves and smoke exhaust systems. Background Technology

[0002] Insufflator, exhaust tube, and clamp valve are commonly used medical devices in laparoscopic surgery. The intended purpose of the insufflator is to establish and maintain pneumoperitoneum during laparoscopic surgery, providing a surgical field of vision and operating space. Because the use of electrocautery, ultrasonic scalpels, and other devices for cutting and electrocoagulation in laparoscopic surgery generates smoke and ablation particles, obscuring the surgical field of vision, an exhaust device is generally required to maintain a clear surgical view. With technological advancements, more and more insufflators have integrated exhaust functions to maintain a clear surgical field of vision and improve the efficiency of laparoscopic surgery. When using the exhaust function of the insufflator, both ends of the exhaust tube need to be connected to the trocar and the negative pressure device (such as a negative pressure generator) on the insufflator. Simultaneously, to control the exhaust, the exhaust tube needs to be inserted into the clamp valve of the insufflator, allowing the clamp valve to control the opening and closing of the exhaust tube. By default, the pinch valve is in a closed exhaust pipe state (to prevent excessive carbon dioxide consumption); when it is necessary to remove smoke and burning particles, the pinch valve opens the exhaust pipe, and the smoke in the abdominal cavity is drawn out through the exhaust pipe under negative pressure. However, with the existing pinch valve, if there is an unexpected power failure, medical staff will not be able to open the exhaust pipe, resulting in the inability to remove smoke and burning particles from the pneumoperitoneum, which directly threatens the safety of the operation. Utility Model Content

[0003] Therefore, it is necessary to provide a pinch valve and smoke exhaust system to address the above problems.

[0004] To address the above problems, this application provides the following technical solution:

[0005] A pinch valve, comprising:

[0006] A linear actuator includes a base, an output shaft, and a pusher, wherein the output shaft is capable of linearly moving relative to the base along a first direction, and the pusher includes a forward push portion and a reverse push portion both fixedly connected to the output shaft;

[0007] A receiving component is fixed to the base body, and the receiving component is provided with a receiving groove for receiving a smoke exhaust pipe;

[0008] A limiting member is fixedly disposed on the receiving member; the limiting member, the receiving groove, and the seat are distributed sequentially in the first direction;

[0009] A pressure-applying member is movably disposed on the receiving member along the first direction, and the pressure-applying member is provided with a pressure-applying head and a counter-push part;

[0010] An elastic element is sandwiched between the pressure-applying element and the forward-pushing part; the limiting element, the pressure-applying head, the elastic element, and the forward-pushing part are distributed sequentially in the first direction;

[0011] The repulsing part is located between the repulsing part and the seat, and is directly opposite the repulsing part along the first direction.

[0012] The working principle of this pinch valve is as follows: The exhaust pipe passes through the receiving tube groove. As the output shaft approaches the limiting member along the first direction, the forward pushing part presses against the elastic element. The elastic element pushes the pressure applying part, thereby bringing the pressure applying head closer to the limiting member. This continuously squeezes the exhaust pipe in the receiving tube groove towards the limiting member until the exhaust pipe is closed. When it is necessary to open the exhaust pipe, the output shaft moves away from the limiting member along the first direction. The reverse pushing part moves synchronously with the output shaft. After the reverse pushing part comes into contact with the reverse pushing part, it pushes the pressure applying part, thereby moving the pressure applying head away from the limiting member, and the exhaust pipe gradually opens. When the distance between the pressure applying head and the limiting member is large enough, the exhaust pipe is fully opened. Even if the pinch valve is unexpectedly de-energized, medical personnel can manually apply force to the pressure applying part, forcing the elastic element to compress, thereby pushing the pressure applying part and moving the pressure applying head away from the limiting member, thus opening the exhaust pipe.

[0013] The clamp valve has at least the following beneficial effects: in the event of an accidental power failure, medical staff can manually open the exhaust pipe to expel smoke and burning particles from the pneumoperitoneum, thus ensuring surgical safety.

[0014] In one embodiment, the pressure-applying member has a circumferentially closed limiting channel, the length direction of the limiting channel is consistent with the first direction, and the end of the limiting channel near the seat body forms a push-back portion, the push-back portion extending into the limiting channel.

[0015] With this configuration, the thrust reverser is confined within the limiting channel, ensuring that the thrust reverser stably abuts against the limiting member as it moves away from the limiting member. This ensures that the thrust reverser stably pushes the pressure applying member, thereby moving the pressure applying head away from the limiting member.

[0016] In one embodiment, the portion of the limiting member that contacts the exhaust pipe is semi-cylindrical.

[0017] With this configuration, the limiting component contacts the exhaust pipe, and the contact area between the limiting component and the exhaust pipe is small. The pressure-applying component only needs to apply a small force to the exhaust pipe to close it. In other words, the elastic component only needs to apply a small elastic force to the pressure-applying component to close the exhaust pipe. In the event of an accidental power failure of the clamp valve, medical staff only need to overcome the small elastic force applied by the elastic component to push the pressure head away from the limiting component, thereby opening the exhaust pipe. This makes it convenient for medical staff to open the exhaust pipe by hand.

[0018] In one embodiment, the pressure head and the limiting member are arranged facing each other along the first direction, and the side of the pressure head facing the limiting member is semi-cylindrical.

[0019] With this configuration, the pressure head contacts the exhaust pipe, and the contact area between the pressure head and the exhaust pipe is small. The pressure-applying component only needs to apply a small force to the exhaust pipe to close it. In other words, the elastic component only needs to apply a small elastic force to the pressure-applying component to close the exhaust pipe. In the event of an accidental power failure of the clamp valve, medical staff only need to overcome the small elastic force applied by the elastic component to push the pressure-applying component, thereby moving the pressure head away from the limiting component and opening the exhaust pipe. This allows medical staff to easily open the exhaust pipe by hand.

[0020] In one embodiment, the receiving member is provided with a first limiting structure and a second limiting structure, and the first limiting structure, the push part, the second limiting structure and the seat are arranged sequentially along the first direction; the first limiting structure and the second limiting structure are both arranged directly opposite the push part; when the push part abuts against the first limiting structure, the pressure head is in a position that can close the exhaust pipe together with the limiting member; when the push part abuts against the second limiting structure, the pressure head is in a position that allows the exhaust pipe to be fully opened.

[0021] This setting helps ensure that the output shaft moves within the correct range.

[0022] In one embodiment, when there is a gap between the push portion and the second limiting structure, the pressure member partially exposes the end of the receiving member away from the seat.

[0023] This design allows medical staff to apply force to the pressure device after an unexpected power outage of the clamp valve, thereby pushing the pressure head to a position that allows the exhaust pipe to be fully opened.

[0024] In one embodiment, the forward thrust portion is detachably connected to the output shaft; and / or, the reverse thrust portion is detachably connected to the forward thrust portion.

[0025] This design facilitates the assembly and disassembly of the clamp valve.

[0026] In one embodiment, the receiving member is provided with a first clearance hole, the pressure member is provided with a second clearance hole, the length direction of the second clearance hole is consistent with the first direction, and the limiting member passes through the first clearance hole and the second clearance hole and is detachably connected to the receiving member.

[0027] This design facilitates the assembly and disassembly of the clamp valve.

[0028] This application also provides another pinch valve, which includes:

[0029] A linear actuator includes a base, an output shaft, and a thrust reverser, wherein the output shaft is capable of linearly moving relative to the base along a first direction, and the thrust reverser is fixed to the output shaft.

[0030] A receiving component is fixedly disposed on the base body. The receiving component is provided with a receiving groove and an abutment part. The receiving groove is used to receive the exhaust pipe.

[0031] A limiting member is fixedly disposed on the receiving member; the limiting member, the receiving groove, the abutting part, and the seat are distributed sequentially in the first direction;

[0032] A pressure-applying member is movably disposed on the receiving member along the first direction, and the pressure-applying member is provided with a pressure-applying head and a counter-push part;

[0033] An elastic element is sandwiched between the pressure-applying element and the abutting portion; the limiting element, the pressure-applying head, the elastic element, and the abutting portion are sequentially distributed in the first direction; the elastic element is used to push the pressure-applying element to a position where the pressure-applying head and the limiting element can jointly close the exhaust pipe;

[0034] The repulsing part is located between the repulsing part and the seat, and is directly opposite the repulsing part along the first direction.

[0035] The working principle of this pinch valve is as follows: The exhaust pipe passes through the receiving groove, and the elastic element is in a compressed state. Under the elastic force of the elastic element on the pressure-applying element, the pressure head and the limiting element together squeeze the exhaust pipe in the receiving groove, thereby closing the exhaust pipe. When it is necessary to open the exhaust pipe, the output shaft moves the reverse thrust part away from the limiting element. After the reverse thrust part comes into contact with the reverse thrust part, it pushes the pressure-applying element, thereby moving the pressure head away from the limiting element, and the exhaust pipe gradually opens. When the distance between the pressure head and the limiting element is large enough, the exhaust pipe is fully opened. Even if the second type of pinch valve experiences an accidental power failure, medical personnel can manually apply force to the pressure-applying element, forcing the elastic element to compress, thereby pushing the pressure-applying element and moving the pressure head away from the limiting element, thus opening the exhaust pipe.

[0036] The clamp valve has at least the following beneficial effects: in the event of an accidental power failure, medical staff can manually open the exhaust pipe to expel smoke and burning particles from the pneumoperitoneum, thus ensuring surgical safety.

[0037] This application also provides a smoke exhaust system, which includes a smoke exhaust pipe and the aforementioned clamp valve, wherein the smoke exhaust pipe is a flexible hose and passes through the duct groove.

[0038] The smoke extraction system has at least the following beneficial effects: because the aforementioned clamp valve is used, in the event of an accidental power failure of the clamp valve provided in this application, medical staff can manually open the smoke extraction pipe to expel smoke and burning particles from the pneumoperitoneum, thereby ensuring surgical safety. Attached Figure Description

[0039] Figure 1 This is a perspective view of a smoke extraction system according to an embodiment of this application;

[0040] Figure 2 for Figure 1 A cross-sectional view of the smoke extraction system shown.

[0041] Figure 3 for Figure 1 A three-dimensional schematic diagram of a clamp valve;

[0042] Figure 4 for Figure 3 The cross-sectional view of the pinch valve shown;

[0043] Figure 5 for Figure 3 The diagram shows an exploded view of the pinch valve.

[0044] Figure 6 for Figure 5 Exploded view of a linear actuator;

[0045] Figure 7 for Figure 5 A three-dimensional schematic diagram of the pressure-applying component;

[0046] Figure 8 for Figure 7 A three-dimensional schematic diagram of the pressure-applying component from another perspective;

[0047] Figure 9 for Figure 5 A three-dimensional schematic diagram of the central accommodating component;

[0048] Figure 10 for Figure 9 A three-dimensional schematic diagram of the accommodating component from another perspective.

[0049] Figure label:

[0050] 100. Pinch valve; 1. Linear actuator; 11. Base; 12. Output shaft; 121. Mounting and positioning part; 122. Threaded part; 13. Pushing part; 131. Forward push part; 132. Reverse push part; 15. Fixing nut; 16. Spring washer; 2. Receiving part; 22. Connecting part; 23. Cylindrical part; 231. Receiving groove; 232. First clearance hole; 233. Third clearance hole; 24. First limiting structure; 25. Second limiting structure; 3. Limiting part; 4. Pressure applying part; 41. Reverse push part; 42. Limiting channel; 43. Pressure applying head; 44. Second clearance hole; 45. Receiving groove; 5. Elastic part; 6. Anti-detachment snap ring; 200. Smoke exhaust pipe. Detailed Implementation

[0051] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0052] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0057] See Figures 1 to 5This application first provides a first type of pinch valve 100, which includes a linear actuator 1, a receiving member 2, a limiting member 3, a pressure applying member 4, and an elastic member 5. The linear actuator 1 includes a base 11, an output shaft 12, and a push member 13. The output shaft 12 is capable of linearly moving relative to the base 11 along a first direction. The push member 13 includes a forward pushing part 131 and a reverse pushing part 132, both of which are fixed to the output shaft 12. Therefore, the forward pushing part 131 and the reverse pushing part 132 move synchronously with the output shaft 12. The receiving member 2 is fixed to the base 11 and has a receiving groove 231 for receiving the exhaust pipe 200. The limiting member 3 is fixed to the receiving member 2, and the limiting member 3, the receiving groove 231, and the base 11 are sequentially distributed along the first direction. The pressure-applying member 4 is movably disposed on the receiving member 2 along the first direction. The pressure-applying member 4 is provided with a pressure head 43 and a reverse-push portion 41. The elastic member 5 is sandwiched between the pressure-applying member 4 and the forward-push portion 131. The limiting member 3, the pressure head 43, the elastic member 5, and the forward-push portion 131 are sequentially distributed along the first direction. The reverse-push portion 41 is located between the reverse-push portion 132 and the seat 11, and is directly opposite the reverse-push portion 132 along the first direction.

[0058] The working principle of the first type of pinch valve 100 is as follows: The exhaust pipe 200 passes through the receiving groove 231. As the output shaft 12 approaches the limiting member 3 along the first direction, the forward push part 131 presses the elastic member 5, and the elastic member 5 pushes the pressure applying member 4, thereby causing the pressure applying head 43 to approach the limiting member 3, thus continuously squeezing the exhaust pipe 200 in the receiving groove 231 toward the limiting member 3 until the exhaust pipe 200 is closed. When it is necessary to open the exhaust pipe 200, the output shaft 12 is moved away from the limiting member 3 along the first direction. The reverse push part 132 moves synchronously with the output shaft 12. After the reverse push part 132 comes into contact with the reverse push part 41, it pushes the pressure applying member 4, thereby causing the pressure applying head 43 to move away from the limiting member 3, and the exhaust pipe 200 gradually opens. When the distance between the pressure applying head 43 and the limiting member 3 is large enough, the exhaust pipe 200 is fully opened. Even if the first type of clamp valve 100 is accidentally de-energized, medical staff can manually apply force to the pressure member 4, forcing the elastic member 5 to compress, thereby pushing the pressure member 4 so that the pressure head 43 moves away from the limit member 3, thus opening the smoke exhaust pipe 200.

[0059] In summary, after an accidental power failure of the first clamp valve 100 provided in this application, medical personnel can manually open the exhaust pipe 200 to expel smoke and burning particles from the pneumoperitoneum, thereby ensuring surgical safety.

[0060] exist Figure 2 and Figure 4 In the illustrated embodiment, the elastic element 5 is a spring. In other embodiments, the elastic element 5 may also be a rubber element.

[0061] exist Figures 4 to 6In the illustrated embodiment, the linear actuator 1 is an electric push rod. In other embodiments, the linear actuator 1 may also be a cylinder or a linear motor.

[0062] Preferably, the limiting member 3 is positioned close to the receiving tube groove 231.

[0063] See Figure 7 and Figure 8 The pressure-applying component 4 has a circumferentially closed limiting channel 42. The length direction of the limiting channel 42 is consistent with the first direction, and the end of the limiting channel 42 near the seat 11 forms a thrust-receiving part 41. (See reference...) Figure 2 The reverse thrust 132 extends into the limiting channel 42. In this way, the reverse thrust 132 is confined within the limiting channel 42, which ensures that the reverse thrust 132 stably abuts against the reverse thrust 41 as it moves away from the limiting member 3, thereby ensuring that the reverse thrust 132 stably pushes the pressure member 4, thereby causing the pressure head 43 to move away from the limiting member 3.

[0064] exist Figure 7 and Figure 8 In the embodiment shown, the limiting channel 42 is a through hole; in other embodiments, the limiting channel 42 may also be a groove.

[0065] See Figure 2 The portion of the limiting member 3 that contacts the exhaust pipe 200 is semi-cylindrical. This ensures that the limiting member 3 is in line contact with the exhaust pipe 200, resulting in a small contact area. The pressure applying member 4 only needs to apply a small force to close the exhaust pipe 200. In other words, the elastic member 5 only needs to apply a small elastic force to close the exhaust pipe 200. After an unexpected power outage of the first clamp valve 100, medical personnel only need to overcome the small elastic force applied by the elastic member 5 to push the pressure head 43 away from the limiting member 3, thereby opening the exhaust pipe 200. This allows medical personnel to easily open the exhaust pipe 200 manually.

[0066] See Figure 2 and Figure 7 The pressure head 43 and the limiting member 3 are arranged facing each other along the first direction, with the side of the pressure head 43 facing the limiting member 3 having a semi-cylindrical shape. In this way, the pressure head 43 is in line contact with the exhaust pipe 200, and the contact area between the pressure head 43 and the exhaust pipe 200 is small. The pressure member 4 only needs to apply a small force to the exhaust pipe 200 to close it. In other words, the elastic member 5 only needs to apply a small elastic force to the pressure member 4 to close the exhaust pipe 200. After the first clamp valve 100 is accidentally de-energized, medical staff only need to overcome the small elastic force applied by the elastic member 5 to push the pressure member 4, thereby moving the pressure head 43 away from the limiting member 3 and opening the exhaust pipe 200, making it convenient for medical staff to open the exhaust pipe 200 by hand.

[0067] See Figures 3 to 5 The receiving member 2 includes a connecting portion 22 and a cylindrical portion 23. The connecting portion 22 is fixed to the base 11, and the cylindrical portion 23 is located on the side of the connecting portion 22 away from the base 11. The axial direction of the cylindrical portion 23 is aligned with the first direction. A tube groove 231 is provided in the cylindrical portion 23, and the output shaft 12 and the pressure applying member 4 both pass through the cylindrical portion 23. Thus, the first type of clamp valve 100 has a compact structure.

[0068] See Figure 5 and Figure 10 The receiving member 2 is provided with a first limiting structure 24 and a second limiting structure 25, which are arranged sequentially along a first direction, including the first limiting structure 24, the forward pushing part 131, the second limiting structure 25, and the seat 11. Both the first limiting structure 24 and the second limiting structure 25 are directly opposite the forward pushing part 131. Thus, the forward pushing part 131 is restricted by the first limiting structure 24 and the second limiting structure 25, and can only move between them. When the forward pushing part 131 is against the first limiting structure 24, the distance between the forward pushing part 131 and the limiting member 3 reaches its minimum, and the pressure head 43 is in a position where it can close the exhaust pipe 200 together with the limiting member 3. When the forward pushing part 131 is against the second limiting structure 25, the distance between the reverse pushing part 132 and the limiting member 3 reaches its maximum, and the pressure head 43 is in a position where the exhaust pipe 200 can be fully opened. This helps ensure that the output shaft 12 moves within the correct range.

[0069] See Figure 10 The first limiting structure 24 protrudes from the inner side of the cylindrical portion 23. (See reference...) Figure 5 The second limiting structure 25 protrudes at least partially from the inner side of the cylindrical portion 23. For ease of assembly and disassembly of the first clamp valve 100, the second limiting structure 25 is detachably connected to the cylindrical portion 23.

[0070] For example, the second limiting structure 25 is threaded to or snapped into the cylindrical portion 23.

[0071] Preferably, with a gap between the push-type portion 131 and the second limiting structure 25, the pressure-applying member 4 is partially exposed at the end of the receiving member 2 away from the seat 11. This facilitates medical personnel in applying force to the pressure-applying member 4 after an unexpected power outage of the first clamp valve 100, thereby pushing the pressure head 43 to a position that allows the exhaust pipe 200 to be fully opened.

[0072] Preferably, the push part 131 is detachably connected to the output shaft 12. This facilitates the assembly and disassembly of the first type of clamp valve 100.

[0073] Preferably, the reverse thrust portion 132 is detachably connected to the forward thrust portion 131. This facilitates the assembly and disassembly of the first type of clamp valve 100.

[0074] See Figure 4, Figure 9 and Figure 10 The receiving component 2 is provided with a first clearance hole 232. (See reference...) Figure 7 and Figure 8 The pressure-applying component 4 is provided with a second clearance hole 44, the length direction of which is consistent with the first direction. (See reference...) Figure 2 and Figure 4 The limiting member 3 passes through the first clearance hole 232 and the second clearance hole 44 and is detachably connected to the receiving member 2. This facilitates the assembly and disassembly of the first type of clamp valve 100.

[0075] Preferably, the first clearance hole 232 is conformally adapted to the limiting member 3.

[0076] See Figure 2 and Figure 4 The first clearance hole 232 is a circular hole, and the limiting member 3 is a screw. The limiting member 3 passes through the first clearance hole 232 and the second clearance hole 44 and is threadedly connected to the receiving member 2. An annular groove is provided on the wall of the first clearance hole 232, and the annular groove is coaxially arranged with the first clearance hole 232. (See reference...) Figure 2 , Figure 4 and Figure 5 The first type of clamp valve 100 also includes an anti-disengagement snap ring 6, which is installed in an annular groove and abuts against the limiting member 3. The anti-disengagement snap ring 6 is used to prevent the limiting member 3 from loosening.

[0077] See Figure 6 The output shaft 12 has a mounting and positioning part 121 and a threaded part 122. The base 11, the mounting and positioning part 121, and the threaded part 122 are distributed sequentially in the first direction. The mounting and positioning part 121 is spline-shaped, and the threaded part 122 has an external thread on its outer periphery. A portion of the forward thrust part 131 is fitted onto the mounting and positioning part 121 and conformally adapted to it. The reverse thrust part 132 is a screw that passes through the forward thrust part 131 along the radial direction of the output shaft 12 and is threadedly connected to the forward thrust part 131. A portion of the forward thrust part 131 is positioned along the axial direction of the output shaft 12 and is directly opposite the end of the mounting and positioning part 121 away from the base 11. The linear actuator 1 also includes a fixing nut 15, which is located at the end of the forward thrust part 131 away from the base 11 and is threadedly connected to the threaded part 122. The fixing nut 15 presses the forward thrust part 131 along the axial direction of the output shaft 12 onto the end of the mounting and positioning part 121 away from the base 11.

[0078] See Figure 6 The linear actuator 1 also includes a spring washer 16, which is sandwiched between the fixed nut 15 and the push part 131.

[0079] See Figure 8The pressure-applying member 4 has an opening in the receiving groove 45, which is conformally adapted to the elastic member 5. The opening of the receiving groove 45 faces the seat 11. A part of the elastic member 5 is located inside the receiving groove 45, and the other part extends out of the receiving groove 45.

[0080] See Figure 3 and Figure 4 A third clearance hole 233 is provided on the cylindrical part 23. (See reference...) Figure 7 and Figure 8 The limiting channel 42 is a through hole. (See reference...) Figure 4 During the assembly of the first type of clamp valve 100, the reverse thrust part 132 is threadedly connected to the forward thrust part 131 after passing through the third clearance hole 233 and the limiting channel 42 in sequence.

[0081] In the first type of clamp valve 100 described above, the end of the elastic member 5 near the seat 11 is used in conjunction with a movable structure such as the push part 131. This application further provides a second type of clamp valve 100, in which the end of the elastic member 5 near the seat 11 is used in conjunction with a fixed structure. Apart from this, the other structures of the second type of clamp valve 100 are the same as the corresponding structures in the first type of clamp valve 100.

[0082] Specifically, the second type of pinch valve 100 includes a linear actuator 1, a receiving member 2, a limiting member 3, a pressure applying member 4, and an elastic member 5. The linear actuator 1 includes a base 11, an output shaft 12, and a thrust-back portion 132. The output shaft 12 is linearly movable relative to the base 11 along a first direction, and the thrust-back portion 132 is fixed to the output shaft 12. Therefore, the thrust-back portion 132 moves synchronously with the output shaft 12. The receiving member 2 is fixed to the base 11 and has a receiving groove 231 and an abutment portion. The receiving groove 231 is used to receive the exhaust pipe 200. The limiting member 3 is fixed to the receiving member 2. The limiting member 3, the receiving groove 231, the abutment portion, and the base 11 are sequentially distributed along the first direction. The pressure applying member 4 is movably disposed on the receiving member 2 along the first direction and has a pressure applying head 43 and a thrust-back portion 41. The elastic element 5 is sandwiched between the pressure-applying element 4 and the abutment portion. The limiting element 3, the pressure head 43, the elastic element 5, and the abutment portion are distributed sequentially in the first direction. The elastic element 5 is used to push the pressure-applying element 4 to a position where the pressure head 43 can close the exhaust pipe 200 together with the limiting element 3. It can be understood that, in order to achieve this, when the exhaust pipe 200 is closed, the elastic element 5 is in a compressed state, and the elastic force of the elastic element 5 on the pressure-applying element 4 is sufficient to make the pressure head 43 and the limiting element 3 close the exhaust pipe 200 together. The reverse thrust portion 41 is located between the reverse thrust portion 132 and the seat 11, and is directly opposite the reverse thrust portion 132 along the first direction.

[0083] The working principle of the second type of pinch valve 100 is as follows: The exhaust pipe 200 passes through the receiving groove 231. The elastic element 5 is in a compressed state. Under the elastic force of the elastic element 5 on the pressure applying element 4, the pressure applying head 43 and the limiting element 3 together squeeze the exhaust pipe 200 in the receiving groove 231, thereby closing the exhaust pipe 200. When it is necessary to open the exhaust pipe 200, the output shaft 12 moves the reverse thrust part 132 away from the limiting element 3. After the reverse thrust part 132 comes into contact with the reverse thrust part 41, it pushes the pressure applying element 4, thereby moving the pressure applying head 43 away from the limiting element 3, and the exhaust pipe 200 gradually opens. When the distance between the pressure applying head 43 and the limiting element 3 is large enough, the exhaust pipe 200 is fully opened. Even if the second type of clamp valve 100 is unexpectedly de-energized, medical staff can manually apply force to the pressure member 4, forcing the elastic member 5 to compress, thereby pushing the pressure member 4 so that the pressure head 43 moves away from the limit member 3, thereby opening the smoke exhaust pipe 200.

[0084] In summary, after an accidental power failure of the second clamp valve 100 provided in this application, medical personnel can manually open the exhaust pipe 200 to expel smoke and burning particles from the pneumoperitoneum, thus ensuring surgical safety.

[0085] See Figure 1 and Figure 2 This application also provides a smoke extraction system, which includes a smoke extraction pipe 200 and any of the aforementioned clamp valves 100. The smoke extraction pipe 200 is a flexible tube and is partially located within the receiving groove 231. Because of the use of the clamp valve 100, in the event of an accidental power failure of the clamp valve 100 provided in this application, medical personnel can manually open the smoke extraction pipe 200 to expel smoke and burning particles from the pneumoperitoneum, thereby ensuring surgical safety.

[0086] See Figure 1 The trough 231 is roughly arc-shaped, narrow in the middle and wide at both ends. The width of the middle portion of the trough 231 is smaller than the outer diameter of the exhaust pipe 200, and the two ends of the trough 231 are conformally fitted to the exhaust pipe 200. (See reference...) Figure 1 Medical staff can press the exhaust pipe 200 into the receiving trough 231 until the exhaust pipe 200 is located at both ends of the receiving trough 231. During the process of passing through the middle part of the receiving trough 231, the exhaust pipe 200 will be deformed by pressure, and will return to its original shape after reaching both ends of the receiving trough 231.

[0087] The dimensions of the limiting channel 42, the second clearance hole 44, and the third clearance hole 233 in the first direction are all larger than the outer diameter of the exhaust pipe 200. For example, the dimensions of the limiting channel 42, the second clearance hole 44, and the third clearance hole 233 in the first direction are 1.5, 2, 2.5, or 3 times the outer diameter of the exhaust pipe 200.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A pinch valve, characterized in that, include: The linear actuator (1) includes a base (11), an output shaft (12) and a pusher (13). The output shaft (12) is capable of linearly moving relative to the base (11) in a first direction. The pusher (13) includes a forward pusher (131) and a reverse pusher (132) both fixedly connected to the output shaft (12). A receiving member (2) is fixed to the base (11). The receiving member (2) is provided with a pipe groove (231) for accommodating the exhaust pipe (200). A limiting member (3) is fixed to the receiving member (2); the limiting member (3), the receiving groove (231) and the seat (11) are distributed sequentially in the first direction; A pressure-applying member (4) is movably disposed on the receiving member (2) along the first direction. The pressure-applying member (4) is provided with a pressure-applying head (43) and a reverse-push part (41). An elastic element (5) is sandwiched between the pressure-applying element (4) and the positive push part (131); the limiting element (3), the pressure-applying head (43), the elastic element (5) and the positive push part (131) are distributed sequentially in the first direction; The repulsing part (41) is located between the repulsing part (132) and the seat (11), and is directly opposite the repulsing part (132) along the first direction.

2. The pinch valve according to claim 1, characterized in that, The pressure-applying component (4) has a circumferentially closed limiting channel (42). The length direction of the limiting channel (42) is consistent with the first direction. The end of the limiting channel (42) near the seat (11) forms a push-back part (41). The push-back part (132) extends into the limiting channel (42).

3. The pinch valve according to claim 1, characterized in that, The portion of the limiting member (3) that contacts the exhaust pipe (200) is semi-cylindrical.

4. The pinch valve according to claim 1, characterized in that, The pressure head (43) and the limiting member (3) are arranged facing each other along the first direction, and the side of the pressure head (43) facing the limiting member (3) is semi-cylindrical.

5. The pinch valve according to claim 1, characterized in that, The receiving member (2) is provided with a first limiting structure (24) and a second limiting structure (25), and the first limiting structure (24), the positive push part (131), the second limiting structure (25) and the seat (11) are arranged sequentially along the first direction; the first limiting structure (24) and the second limiting structure (25) are both arranged directly opposite to the positive push part (131); When the push part (131) abuts against the first limiting structure (24), the pressure head (43) is in a position that can close the exhaust pipe (200) together with the limiting member (3); when the push part (131) abuts against the second limiting structure (25), the pressure head (43) is in a position that allows the exhaust pipe (200) to be fully opened.

6. The pinch valve according to claim 5, characterized in that, When there is a gap between the push part (131) and the second limiting structure (25), the pressure member (4) partially exposes the end of the receiving member (2) away from the seat (11).

7. The pinch valve according to claim 1, characterized in that, The forward thrust section (131) is detachably connected to the output shaft (12); and / or, the reverse thrust section (132) is detachably connected to the forward thrust section (131).

8. The pinch valve according to claim 1, characterized in that, The receiving member (2) is provided with a first clearance hole (232), and the pressure member (4) is provided with a second clearance hole (44). The length direction of the second clearance hole (44) is consistent with the first direction. The limiting member (3) passes through the first clearance hole (232) and the second clearance hole (44) and is detachably connected to the receiving member (2).

9. A pinch valve, characterized in that, include: A linear actuator (1) includes a base (11), an output shaft (12), and a thrust reverser (132). The output shaft (12) is capable of linearly moving relative to the base (11) in a first direction, and the thrust reverser (132) is fixed to the output shaft (12). The receiving member (2) is fixed to the seat (11). The receiving member (2) is provided with a receiving groove (231) and an abutment part. The receiving groove (231) is used to receive the exhaust pipe (200). A limiting member (3) is fixed to the receiving member (2); the limiting member (3), the receiving groove (231), the abutting part and the seat (11) are distributed sequentially in the first direction; A pressure-applying member (4) is movably disposed on the receiving member (2) along the first direction. The pressure-applying member (4) is provided with a pressure-applying head (43) and a reverse-push part (41). An elastic element (5) is sandwiched between the pressure-applying element (4) and the abutting part. The limiting element (3), the pressure-applying head (43), the elastic element (5), and the abutting part are distributed sequentially in the first direction. The elastic element (5) is used to push the pressure-applying element (4) to a position where the pressure-applying head (43) can close the exhaust pipe (200) together with the limiting element (3). The repulsing part (41) is located between the repulsing part (132) and the seat (11), and is directly opposite the repulsing part (132) along the first direction.

10. A smoke extraction system, characterized in that, It includes a smoke exhaust pipe (200) and a clamp valve according to any one of claims 1 to 9, wherein the smoke exhaust pipe (200) is a flexible hose and passes through the receiving groove (231).

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