Quick release structure for a pneumatic tube clamp valve
Patent Information
- Application Number
- CN202611372018.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-05
- Publication Date
- 2026-10-09
AI Technical Summary
但受排气流导和管路阻力限制，驱动腔内气压下降缓慢，残余压力会阻碍夹紧构件退回；同时橡胶管受压变形后回弹力不足、与夹紧构件间摩擦较大，导致弹性橡胶管的释放速度较慢，难以满足快速开启工况的使用要求
[0012]本发明的有益效果如下：通过在阀体与弹性橡胶管之间设置由活动组件分隔形成的第一气腔、活动腔以及第二气腔，并利用复位件驱动活动组件复位，使夹紧件能够在气压释放后快速退回，从而减少传统结构中因驱动腔残余压力导致的开启阻滞问题，提高夹紧件的释放响应速度，同时，活动组件带动夹紧件同步运动，使夹紧件对弹性橡胶管的夹紧与放松过程更加稳定，有利于降低夹紧件与弹性橡胶管之间的摩擦阻力，促进弹性橡胶管快速恢复通径，实现气动管夹阀的快速开启，此外，通过设置第一通气口和第二通气口分别连通第一气腔和第二气腔，使气压作用能够驱动活动组件朝不同方向运动，任意一个通气口充气即可实现流道的关闭，若两个通气口同时充气可以提供夹紧件更稳定的驱动力，从而实现对夹紧件运动状态的灵活控制，增强阀门开启及关闭过程的可靠性，该结构能够有效缩短弹性橡胶管由闭合状态恢复至开启状态的时间，提高气动管夹阀的动态响应性能，满足需要快速启闭的管路系统使用需求，同时保持气动管夹阀耐磨损、耐腐蚀及适用于输送颗粒性介质等优点。
Smart Images
Figure CN122880918A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of valve technology, and in particular to a quick-opening and releasing structure for a pneumatic clamp valve. Background Technology
[0002] Pneumatic pinch valves are valves that use compressed air to drive clamping components to press and close elastic rubber tubes, thereby controlling the opening and closing of pipelines. Since only the rubber tube contacts the medium in its flow passage, it has advantages such as wear resistance, corrosion resistance, and resistance to clogging, and is widely used in pipeline systems conveying media containing particles or corrosive substances.
[0003] Traditional pneumatic clamp valves require the expulsion of compressed air from the drive chamber to retract the clamping component when opened, allowing the rubber hose to recover its flow path through its own elasticity. However, due to limitations in exhaust flow and pipeline resistance, the air pressure in the drive chamber decreases slowly, and residual pressure hinders the retraction of the clamping component. Simultaneously, the rubber hose, after being deformed under pressure, exhibits insufficient rebound force and significant friction with the clamping component, resulting in a slow release speed for the elastic rubber hose, making it difficult to meet the requirements for rapid opening. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a quick opening and release structure for a pneumatic clamp valve. This invention uses a reset member to drive the movable component to reset, so that the clamping member can quickly retract after the air pressure is released, thereby promoting the rapid restoration of flow in the elastic rubber tube.
[0005] The technical solution adopted by this invention is as follows: A quick-opening and releasing structure for a pneumatic clamp valve includes a valve body and an elastic rubber tube disposed inside the valve body. The elastic rubber tube has a flow channel inside. The valve body has a first vent and a second vent. A cavity is provided between the elastic rubber tube and the valve body. A clamping member, a resetting member, and a movable component are disposed in the cavity. The movable component is movably disposed in the cavity through the resetting member, and the movable component divides the cavity into a first air chamber, a movable chamber, and a second air chamber. The first air chamber is connected to the first vent, and the second air chamber is connected to the second vent. The clamping member is movably disposed in the movable chamber through the movable component for clamping or releasing the elastic rubber tube. The resetting member is also disposed in the movable chamber for driving the movable component to move toward the first air chamber or the second air chamber. When the first vent or the second vent is inflated, the movable component moves toward the movable chamber, causing the clamping member to clamp the elastic rubber tube. When the first vent or the second vent is deflated, the resetting member drives the movable component to move toward the first air chamber or the second air chamber, while the clamping member releases the elastic rubber tube.
[0006] The movable component includes a first piston sleeve and a second piston sleeve that are interlocked with each other. The reset member is simultaneously sleeved on the outside of the first piston sleeve and the second piston sleeve to drive the first piston sleeve to slide toward the first air chamber and to drive the second piston sleeve to slide toward the second air chamber. The inner circumference of the first piston sleeve is provided with a first platform and a first boss protruding from the first platform. The inner circumference of the second piston sleeve is provided with a second platform and a second boss protruding from the second platform. When the clamping member engages with both the first platform and the second platform, the elastic rubber tube is released. When the clamping member engages with the first boss or the second boss, the elastic rubber tube is clamped.
[0007] The first platform and the second platform are coplanar. The first boss and the first platform have an arc transition. The second boss and the second platform also have an arc transition. The first boss and the second boss are staggered. The clamping member has a first arc surface and a second arc surface on both sides that cooperate with the first boss and the second boss, respectively.
[0008] The first piston sleeve is provided with a first piston body that separates the movable chamber and the first air chamber, and the second piston sleeve is provided with a second piston body that separates the movable chamber and the second air chamber. The reset member is a compression spring, which is abutted between the first piston body and the second piston body.
[0009] The first piston sleeve and the second piston sleeve are connected to form a cylinder for the reset member to be fitted. The contact surface of the first piston sleeve and the second piston sleeve is provided with a limiting groove. The second piston sleeve is provided with a limiting block that is slidably disposed in the limiting groove. When the limiting block abuts against the inner wall of one side of the limiting groove, the clamping member abuts against the first boss and the second boss at the same time.
[0010] The clamping component includes a first clamping plate and a second clamping plate with the same structure and symmetrically arranged on both sides of the elastic rubber tube. The end of the first clamping plate near the movable component is a semi-circular surface, and the end near the elastic rubber tube is a flat surface.
[0011] A positioning sleeve is also provided between the movable component and the elastic rubber tube. The positioning sleeve includes a first sleeve and a second sleeve. The first sleeve and the second sleeve are fastened together to form two positioning vertical grooves for the first clamping plate and the second clamping plate to slide respectively. The outer walls of the first sleeve and the second sleeve are provided with several reinforcing ribs.
[0012] The beneficial effects of this invention are as follows: By setting a first air chamber, a movable chamber, and a second air chamber separated by a movable component between the valve body and the elastic rubber tube, and using a reset component to drive the movable component to reset, the clamping component can quickly retract after the air pressure is released. This reduces the opening resistance problem caused by residual pressure in the drive chamber in traditional structures, and improves the release response speed of the clamping component. At the same time, the movable component drives the clamping component to move synchronously, making the clamping and releasing process of the clamping component on the elastic rubber tube more stable, which helps to reduce the frictional resistance between the clamping component and the elastic rubber tube, promotes the rapid restoration of the flow diameter of the elastic rubber tube, and realizes the rapid opening of the pneumatic clamp valve. In addition, by setting... The first and second vents are connected to the first and second air chambers respectively, allowing air pressure to drive the moving components in different directions. Inflating either vent will close the flow channel. If both vents are inflated simultaneously, they can provide a more stable driving force for the clamping components, thereby enabling flexible control of the clamping components' movement and enhancing the reliability of the valve's opening and closing process. This structure can effectively shorten the time for the elastic rubber tube to return from a closed state to an open state, improve the dynamic response performance of the pneumatic pinch valve, meet the needs of pipeline systems that require rapid opening and closing, and maintain the advantages of the pneumatic pinch valve such as wear resistance, corrosion resistance, and suitability for conveying particulate media. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.
[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a further exploded schematic diagram of the present invention; Figure 4 This is a cross-sectional schematic diagram of the present invention; Figure 5 A cross-sectional view of the clamping device when clamping the elastic rubber tube; Figure 6 This is a cross-sectional view of the active component; Figure 7 This is a schematic diagram of the structure of the first clamping plate; In the diagram, 1-valve body, 2-elastic rubber tube, 3-flow channel, 4-first vent, 5-second vent, 6-cavity, 7-clamping component, 8-reset component, 9-moving component, 10-first air chamber, 11-moving chamber, 12-second air chamber, 13-first piston sleeve, 14-second piston sleeve, 15-first platform, 16-first boss, 17-second platform, 18-second boss, 19-first arc surface, 20-second arc surface, 21-first piston body, 22-second piston body, 23-limiting groove, 24-limiting block, 25-first clamping plate, 26-second clamping plate, 27-first clamping sleeve, 28-second clamping sleeve, 29-positioning vertical groove, 30-reinforcing rib, 31-threaded connection cover, 32-mounting sleeve, 33-mounting cover. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.
[0016] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.
[0017] The directional and positional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for illustrating and understanding this invention, and not for limiting the scope of protection of this invention.
[0018] like Figures 1 to 7As shown in the figure, a quick-opening and releasing structure for a pneumatic clamp valve is provided, comprising a valve body 1 and an elastic rubber tube 2 disposed inside the valve body 1. The elastic rubber tube 2 has a flow channel 3 inside. The valve body 1 has a first vent 4 and a second vent 5. A cavity 6 is provided between the elastic rubber tube 2 and the valve body 1. A clamping member 7, a resetting member 8, and a movable component 9 are disposed within the cavity 6. The movable component 9 is movably disposed within the cavity 6 via the resetting member 8, and the movable component 9 divides the cavity 6 into a first air chamber 10, a movable chamber 11, and a second air chamber 12. The first air chamber 10 is connected to the first vent 4. The second air chamber 12 is connected to the second air vent 5. The clamping member 7 is movably disposed in the movable chamber 11 via the movable component 9 for clamping or releasing the elastic rubber tube 2. The resetting member 8 is also disposed in the movable chamber 11 for driving the movable component 9 to move toward the first air chamber 10 or the second air chamber 12. When the first air vent 4 or the second air vent 5 is inflated, the movable component 9 moves toward the movable chamber 11, causing the clamping member 7 to clamp the elastic rubber tube 2. When the first air vent 4 or the second air vent 5 is deflated, the resetting member 8 drives the movable component 9 to move toward the first air chamber 10 or the second air chamber 12, while the clamping member 7 releases the elastic rubber tube 2.
[0019] The beneficial effects of this design are as follows: By setting a first air chamber, a movable chamber, and a second air chamber separated by a movable component between the valve body and the elastic rubber tube, and using a reset component to drive the movable component to reset, the clamping component can quickly retract after the air pressure is released. This reduces the opening resistance problem caused by residual pressure in the drive chamber in traditional structures, and improves the release response speed of the clamping component. Simultaneously, the movable component drives the clamping component to move synchronously, making the clamping and releasing process of the clamping component on the elastic rubber tube more stable. This helps reduce the frictional resistance between the clamping component and the elastic rubber tube, promotes the rapid restoration of the elastic rubber tube's diameter, and achieves rapid opening of the pneumatic clamp valve. Furthermore, by setting... The first and second vents are connected to the first and second air chambers respectively, allowing air pressure to drive the moving components in different directions. Inflating either vent will close the flow channel. If both vents are inflated simultaneously, they can provide a more stable driving force for the clamping components, thereby enabling flexible control of the clamping components' movement and enhancing the reliability of the valve's opening and closing process. This structure can effectively shorten the time for the elastic rubber tube to return from a closed state to an open state, improve the dynamic response performance of the pneumatic pinch valve, meet the needs of pipeline systems that require rapid opening and closing, and maintain the advantages of the pneumatic pinch valve such as wear resistance, corrosion resistance, and suitability for conveying particulate media.
[0020] Further, the movable component 9 includes a first piston sleeve 13 and a second piston sleeve 14 that are interlocked. The reset member 8 is simultaneously sleeved on the outside of the first piston sleeve 13 and the second piston sleeve 14 to drive the first piston sleeve 13 to slide toward the first air chamber 10 and to drive the second piston sleeve 14 to slide toward the second air chamber 12. The inner circumference of the first piston sleeve 13 is provided with a first platform 15 and a first boss 16 protruding from the first platform 15. The inner circumference of the second piston sleeve 14 is provided with a second platform 17 and a second boss 18 protruding from the second platform 17. When the clamping member 7 is engaged with both the first platform 15 and the second platform 17, the elastic rubber tube 2 is released. When the clamping member 7 is engaged with either the first boss 16 or the second boss 18, the elastic rubber tube 2 is clamped.
[0021] The beneficial effects of this design are as follows: By setting the movable components as a first piston sleeve and a second piston sleeve that interlock, and utilizing a reset component that acts simultaneously on both piston sleeves, the movable components can achieve bidirectional synchronous reset when the air pressure changes, improving the stability and response speed of the movable component's movement. Simultaneously, the first and second piston sleeves are respectively positioned to correspond to the first and second air chambers, allowing the air pressure drive and reset drive to cooperate, effectively reducing the risk of jamming during the movement of the movable components and ensuring the reliability of the clamping component's action. By setting a first platform and a first boss, as well as a second platform and a second boss, on the inner circumference of the first and second piston sleeves respectively, the clamping component can clamp or release the elastic rubber tube according to its engagement with different structural parts. When the clamping component engages with both the first and second platforms simultaneously, it is in the released position, reducing the compressive force on the elastic rubber tube and allowing it to quickly restore its flow channel diameter. When the clamping component engages with either the first or second boss, it can push the clamping component to press the elastic rubber tube, achieving reliable pipe cutoff. With the above structure, the clamping stroke and release stroke of the clamping element are both limited and controlled by the first piston sleeve and the second piston sleeve, which improves the accuracy of the clamping element's movement position, thereby further improving the opening speed, operational stability and service life of the pneumatic clamp valve.
[0022] Further configuration: the first platform 15 and the second platform 17 are coplanar; the first boss 16 and the first platform 15 are arc-shaped transitions; the second boss 18 and the second platform 17 are also arc-shaped transitions; and the first boss 16 and the second boss 18 are staggered. The clamping member 7 has a first arc surface 19 and a second arc surface 20 on both sides that cooperate with the first boss 16 and the second boss 18, respectively.
[0023] The beneficial effects of this design are as follows: By setting the first and second platforms as coplanar structures, the clamping member can maintain uniform force when engaging with the first and second platforms, thereby improving the stability of the clamping member in the released state and avoiding offset or jamming caused by uneven force on both sides. Simultaneously, setting the first boss and the first platform, and the second boss and the second platform as arc-shaped transition structures respectively, allows for smooth guidance when the clamping member switches between the first boss, the second boss, and the corresponding platform, reducing impact and frictional resistance during movement and improving the smoothness of the clamping member's operation. By staggering the first and second bosses and providing a first arc surface and a second arc surface on both sides of the clamping member to engage with the first and second bosses respectively, the clamping member can move along a predetermined trajectory under the drive of the movable component, achieving rapid switching between the clamping and released states between the clamping member and the elastic rubber tube. This structure enhances the stability of the fit between the clamping element and the first and second piston sleeves, preventing the clamping element from deflecting or disengaging during movement, improving the reliability of valve opening and closing actions, and enabling the clamping element to quickly disengage from the clamping position with the help of the arc transition surface during release, and smoothly move to the release position under the action of the reset element. This reduces the obstruction in the process of the elastic rubber tube restoring the flow path, improves the opening response speed of the pneumatic clamp valve, and ensures the sealing reliability when the pipeline is cut off.
[0024] Further, the first piston sleeve 13 is provided with a first piston body 21 that separates the movable cavity 11 and the first air cavity 10, and the second piston sleeve 14 is provided with a second piston body 22 that separates the movable cavity 11 and the second air cavity 12. The reset member 8 is a compression spring, which is abutted between the first piston body 21 and the second piston body 22.
[0025] The beneficial effects of this design are as follows: it creates independent working spaces between the first air chamber, the movable chamber, and the second air chamber, effectively improving the sealing performance during the pneumatic drive process. Simultaneously, the first and second piston bodies can respectively withstand the pneumatic pressure within their respective air chambers, making the movement of the first and second piston sleeves more stable and improving the accuracy of the clamping action. The reset component uses a compression spring from existing technology, providing a stable elastic reset force. A single compression spring can simultaneously drive the first and second piston bodies to reset, resulting in a simplified structure, concentrated force application, and improved stability of the synchronous movement of the first and second piston sleeves.
[0026] Further, the first piston sleeve 13 and the second piston sleeve 14 are connected to form a cylinder for the reset member 8 to be fitted. A limiting groove 23 is provided on the contact surface of the first piston sleeve 13 and the second piston sleeve 14. A limiting block 24 is provided on the second piston sleeve 14 and is slidably disposed in the limiting groove 23. When the limiting block 24 abuts against the inner wall of one side of the limiting groove 23, the clamping member 7 abuts against the first boss 16 and the second boss 18 at the same time.
[0027] The beneficial effects of this design are as follows: By setting a limiting groove on the contact surface of the first and second piston sleeves, and setting a limiting block on the second piston sleeve that slides within the limiting groove, an axial limiting and guiding relationship is formed between the first and second piston sleeves. This limits their relative range of motion, preventing excessive sliding or misalignment during movement, thus ensuring the overall stability of the moving component. When the limiting block abuts against the inner wall of one side of the limiting groove, the sliding position of the first and second piston sleeves is precisely limited, allowing the clamping element to synchronously abut against the first and second bosses, forming a stable clamping state and ensuring that the elastic rubber tube can fully cut off the flow channel. The aforementioned limiting structure also effectively improves the accuracy of the clamping element's release position, avoiding the problem of the elastic rubber tube not fully opening due to insufficient reset stroke of the moving component.
[0028] Further, the clamping member 7 includes a first clamping plate 25 and a second clamping plate 26 with the same structure and symmetrically arranged on both sides of the elastic rubber tube 2. The end of the first clamping plate 25 near the movable component 9 is a semi-arc surface, and the end near the elastic rubber tube 2 is a flat surface.
[0029] The beneficial effects of this design are as follows: it allows the elastic rubber tube to be subjected to synchronous forces from both sides during clamping, thereby improving the balance of clamping force; by setting the end of the clamping plate near the movable component as a semi-circular surface, a smooth contact fit is formed between the clamping plate and the movable component, which can reduce the frictional resistance between the clamping component and the movable component during movement and reduce movement jamming; and by setting the end of the clamping plate near the elastic rubber tube as a flat surface, a larger contact area is formed between the clamping plate and the elastic rubber tube, which can achieve uniform compression when clamping the elastic rubber tube, reduce local stress concentration, and reduce the risk of damage to the elastic rubber tube caused by long-term pressure deformation.
[0030] Furthermore, a positioning sleeve is provided between the movable component 9 and the elastic rubber tube 2. The positioning sleeve includes a first sleeve 27 and a second sleeve 28. The first sleeve 27 and the second sleeve 28 are fastened together to form two positioning vertical grooves 29 for the first clamping plate 25 and the second clamping plate 26 to slide respectively. The outer walls of the first sleeve 27 and the second sleeve 28 are provided with a number of reinforcing ribs 30.
[0031] The beneficial effects of this design are as follows: the split-type jacket structure facilitates disassembly and assembly, and the formed positioning vertical groove can limit and guide the movement direction of the clamping plate, allowing it to move up and down only in a preset direction, ensuring stable clamping or release of the elastic rubber tube. Several reinforcing ribs on the surface of the jacket can improve the overall structural strength and deformation resistance of the positioning jacket, enabling the positioning jacket to maintain a stable structural shape during repeated movement of the clamping components and compression of the elastic rubber tube, avoiding deformation of the positioning jacket due to long-term stress, which would affect the movement accuracy of the clamping components.
[0032] Furthermore, several adaptable assembly parts are provided, such as threaded connection cover 31, mounting sleeve 32, and mounting cover 33. The threaded connection cover is threaded to both ends of the valve body for external pipelines and limits the internal parts of the valve body. The mounting sleeve and the matching mounting cover are installed between the threaded connection cover and the internal parts. The mounting sleeve is connected to the movable component inside and the positioning clip outside. The mounting cover is then snapped on for the installation and positioning of the internal parts. A sealing ring is also provided between the mounting sleeve, the mounting cover, and the valve body to ensure the sealing of the end and the air chamber. An annular groove is also provided on the outer end face of the mounting sleeve and the mounting cover for the end of the elastic rubber tube to be inserted. The first piston body and the second piston body also extend with limiting rings that abut against the mounting sleeve and the mounting cover to prevent the piston body from sliding excessively. They cooperate with the internal limiting block and limiting groove to limit the range of motion of the movable component.
[0033] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.
Claims
1. A quick-opening and releasing structure for a pneumatic clamp valve, comprising a valve body (1) and an elastic rubber tube (2) disposed inside the valve body (1), wherein the elastic rubber tube (2) has a flow channel (3) inside, characterized in that: The valve body (1) is provided with a first vent (4) and a second vent (5). A cavity (6) is provided between the elastic rubber tube (2) and the valve body (1). A clamping member (7), a resetting member (8), and a movable component (9) are provided in the cavity (6). The movable component (9) is movably disposed in the cavity (6) through the resetting member (8), and the movable component (9) divides the cavity (6) into a first air chamber (10), a movable chamber (11), and a second air chamber (12). The first air chamber (10) is connected to the first vent (4), and the second air chamber (12) is connected to the second vent (5). The clamping member (7) is movably disposed in the cavity (6) through the movable component (9). The movable component (9) is set in the movable cavity (11) to clamp or release the elastic rubber tube (2). The reset component (8) is also set in the movable cavity (11) to drive the movable component (9) to move toward the first air cavity (10) or the second air cavity (12). When the first air vent (4) or the second air vent (5) is inflated, the movable component (9) moves toward the movable cavity (11) to drive the clamping component (7) to clamp the elastic rubber tube (2). When the first air vent (4) or the second air vent (5) is deflated, the reset component (8) drives the movable component (9) to move toward the first air cavity (10) or the second air cavity (12), while the clamping component (7) releases the elastic rubber tube (2).
2. The quick-opening and releasing structure of a pneumatic clamp valve according to claim 1, characterized in that: The movable component (9) includes a first piston sleeve (13) and a second piston sleeve (14) that are interlocked. The reset member (8) is simultaneously sleeved on the outside of the first piston sleeve (13) and the second piston sleeve (14) to drive the first piston sleeve (13) to slide toward the first air chamber (10) and to drive the second piston sleeve (14) to slide toward the second air chamber (12). The first piston sleeve (13) has a first platform (15) and a first boss (16) protruding on the first platform (15) on its inner circumference. The second piston sleeve (14) has a second platform (17) and a second boss (18) protruding on the second platform (17) on its inner circumference. When the clamping member (7) is engaged with both the first platform (15) and the second platform (17) at the same time, the elastic rubber tube (2) is released. When the clamping member (7) is engaged with the first boss (16) or the second boss (18), the elastic rubber tube (2) is clamped.
3. The quick-opening and releasing structure of a pneumatic clamp valve according to claim 2, characterized in that: The first platform (15) and the second platform (17) are coplanar. The first boss (16) and the first platform (15) are in an arc transition. The second boss (18) and the second platform (17) are also in an arc transition. The first boss (16) and the second boss (18) are staggered. The clamping member (7) has a first arc surface (19) and a second arc surface (20) on both sides that cooperate with the first boss (16) and the second boss (18), respectively.
4. The quick-opening and releasing structure of a pneumatic clamp valve according to claim 2, characterized in that: The first piston sleeve (13) is provided with a first piston body (21) that separates the movable cavity (11) and the first air cavity (10), and the second piston sleeve (14) is provided with a second piston body (22) that separates the movable cavity (11) and the second air cavity (12). The reset member (8) is a compression spring, which is abutted between the first piston body (21) and the second piston body (22).
5. The quick-opening and releasing structure of a pneumatic clamp valve according to claim 3, characterized in that: The first piston sleeve (13) and the second piston sleeve (14) are connected to form a cylinder for the reset member (8) to be fitted. The contact surface of the first piston sleeve (13) and the second piston sleeve (14) is provided with a limiting groove (23). The second piston sleeve (14) is provided with a limiting block (24) that is slidably disposed in the limiting groove (23). When the limiting block (24) abuts against the inner wall of one side of the limiting groove (23), the clamping member (7) abuts against the first boss (16) and the second boss (18) at the same time.
6. The quick-opening and releasing structure of a pneumatic clamp valve according to claim 1, characterized in that: The clamping member (7) includes a first clamping plate (25) and a second clamping plate (26) with the same structure and symmetrically arranged on both sides of the elastic rubber tube (2). The first clamping plate (25) has a semi-circular surface at one end near the movable component (9) and a flat surface at the other end near the elastic rubber tube (2).
7. The quick-opening and releasing structure of a pneumatic clamp valve according to claim 6, characterized in that: A positioning sleeve is also provided between the movable component (9) and the elastic rubber tube (2). The positioning sleeve includes a first sleeve (27) and a second sleeve (28). The first sleeve (27) and the second sleeve (28) are fastened together to form two positioning vertical grooves (29) for the first clamping plate (25) and the second clamping plate (26) to slide respectively. The outer walls of the first sleeve (27) and the second sleeve (28) are provided with several reinforcing ribs (30).