A high performance zero leakage knife gate valve

Abstract

The present invention discloses a high-performance zero-leakage knife gate valve, comprising an outer shell, a gate knife component fixedly connected to the top of the outer shell, an isolation tube fixedly connected to the bottom of the outer shell, a sealing component fixedly connected to the side of the isolation tube, and a supporting component fixedly connected to the side of the sealing component, the supporting component can provide support for the sealing component to strengthen the seal and prevent leakage. The present invention relates to the field of gate technology. In this high-performance zero-leakage knife gate valve, the outer shell provides support and connection for the gate valve, the gate knife component controls the opening and closing of the gate valve, the isolation tube receives the gate knife and controls the opening and closing, the sealing component provides sealing for the contact surface and gap between the gate knife and the isolation tube, the supporting component provides support for the sealing component, and ensures that the sealing component can always maintain a working state and is not affected by the movement of the blade. If the gate knife movement causes damage to the rubber ring after working for a period of time and the rubber ring needs to be replaced, the rubber ring can be directly taken out from the bottom of the gate valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a high-performance zero-leakage knife gate valve. Background Art

[0002] Knife gate valve is a kind of pipeline system widely used in medical, food and sanitation fields. It has the functions of light weight and excellent cutting effect. In order to prevent the leakage of knife gate valve during use, high-performance zero-leakage knife gate valve is needed. Knife gate valve leakage refers to the leakage of knife gate valve when it is closed or open. Knife gate valve is a commonly used valve type used to control the flow of fluid. Leakage may be due to design or manufacturing defects in the knife gate valve itself, or it may be caused by long-term use or wear. It is difficult for knife gate valve to achieve zero leakage in actual application. Although the knife gate valve can provide better sealing performance in the closed state, there may be tiny leakage due to the contact surface and gap between the blade and the valve seat, as well as the connection between the blade and the valve body.

[0003] In order to reduce leakage between the blade and the valve seat, it is best to add a sealing component to seal it. However, due to the long-term relative movement and friction between the blade and the valve seat, it is difficult for the sealing rubber ring to always maintain a good contact and sealing state. Therefore, a component is required to support the rubber ring to resist the influence of the blade movement. In addition, the rubber ring is easily worn due to the friction of the blade and needs to be replaced frequently. If it is completely disassembled for replacement, it will take time. It needs to be able to be disassembled quickly to save time. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-performance zero-leakage knife gate valve, comprising an outer shell, a gate knife component is fixedly connected to the top of the outer shell, an isolation tube is fixedly connected to the bottom of the outer shell, a sealing component is fixedly connected to the side of the isolation tube, and a supporting component is fixedly connected to the side of the sealing component, the supporting component can provide support for the sealing component to strengthen the seal to prevent leakage, the outer shell provides support and connection for the gate valve, the gate knife component controls the opening and closing of the gate valve, the isolation tube receives the gate knife and controls the opening and closing, the sealing component provides sealing for the contact surface and gap between the gate knife and the isolation tube, and the supporting component provides support for the sealing component to ensure that the sealing component can always maintain a working state and is not affected by the movement of the blade.

[0005] Furthermore, the gate knife component includes a cylinder, the bottom of the cylinder is fixedly connected to the outer shell, the bottom of the cylinder is fixedly connected to a gate knife, the bottom outer edge of the gate knife is arc-shaped, the cylinder controls the gate knife to rise or fall, the gate knife rises and leaves the isolation tube, the gate valve opens, the gate knife falls and contacts the isolation tube, and the gate valve closes.

[0006] Furthermore, the isolation tube includes a tube body, the top of the tube body is fixedly connected to the outer shell, the side of the tube body is fixedly connected to a mounting ring, the inner wall of the tube body is provided with an arc groove, the inner wall of the arc groove cooperates with a gate knife, the gate knife descends and matches with the arc groove of the tube body to complete the closing of the gate valve, and an arc groove is arranged on the inner wall of the tube body to cooperate with the gate knife with an arc bottom to improve the sealing performance.

[0007] Furthermore, the sealing component includes an upper sealing ring, a side surface of the upper sealing ring is fixedly connected to the pipe body, the side surface of the upper sealing ring is rotatably connected to the lower sealing ring, the side of the upper sealing ring away from the lower sealing ring is threadedly connected to a locking nut, the inner wall of the upper sealing ring is fixedly connected to a rubber ring, the inner wall of the lower sealing ring is provided with a groove, the groove is in contact with the rubber ring, the inner walls of the lower sealing ring and the upper sealing ring are both provided with grooves, the rubber ring is placed in the groove, provides sealing for the gate knife, improves the sealing performance, and prevents leakage, if the gate knife movement causes damage to the rubber ring after working for a period of time, the rubber ring needs to be replaced, the locking nut can be rotated, the lower sealing ring can be opened, and the rubber ring can be directly taken out from the bottom of the gate valve, there is no need to disassemble the gate valve from the pipeline system, the replacement is simple, time is saved, and the performance of the gate valve is improved.

[0008] Furthermore, the supporting member includes a supporting tube, a side surface of the supporting tube is fixedly connected to the upper sealing ring, a sliding groove is opened on the outer surface of the supporting tube, a sliding block is slidably connected to the inner wall of the sliding groove, a magnetic ring is fixedly connected to the top of the sliding block, a telescopic rod is fixedly connected to the side surface of the sliding block, and the bottom of the telescopic rod is fixedly connected to the supporting tube, and the telescopic rod is extended and retracted to drive the sliding block to slide, and drive the magnetic ring to slide, thereby providing power to the supporting structure in the supporting tube through magnetic force.

[0009] Furthermore, the inner wall of the support tube is rotatably connected to a threaded rod through a connecting frame, the end face of the threaded rod is fixedly connected to a fan blade, and the end of the threaded rod away from the fan blade is fixedly connected to a supporting structure. When liquid flows through the support tube, it will drive the fan blade to rotate, the fan blade drives the threaded rod to rotate, and the threaded rod drives the supporting structure to rotate, providing support for each point of the sealing component during movement, improving the sealing performance, and preventing leakage.

[0010] Furthermore, the supporting structure includes a sleeve, the inner wall of the sleeve is slidably connected to the threaded rod, the inner wall of the sleeve is rotatably connected to a gear, the inner wall of the gear is threadedly connected to the threaded rod, a supporting rod is meshed on the side of the gear, the outer surface of the sleeve is fixedly connected to a connecting tube, the inner wall of the connecting tube is slidably connected to the supporting rod, the end of the supporting rod away from the gear is rotatably connected to a supporting ball, the end of the sleeve away from the gear is fixedly connected to a magnet, the magnet and the magnetic ring are in the same plane, the outer surface of the supporting ball is in contact with the rubber ring, the telescopic rod is telescoped to drive the slider to slide, and the magnetic ring is driven to slide, the sliding of the magnetic ring will drive the magnet in the supporting tube to slide through magnetic force, the sliding of the magnet drives the sleeve to slide, the sliding of the sleeve on the threaded rod will drive the gear to move on the threaded rod, when the sleeve drives the gear to move toward the rubber ring, the gear will move on the threaded rod and rotate under the action of the threaded rod, during the rotation, the gear drives the supporting rod to extend toward the rubber ring, the connecting tube controls the direction of the supporting rod so that it always moves toward the rubber ring, the supporting ball at the end of the supporting rod contacts the rubber ring, the telescopic rod stops moving, and the supporting The ball presses the rubber ring toward the sealing ring and the gate knife from various points to maintain its working state, prevent the gate knife movement from affecting the rubber ring, ensure the sealing effect, and prevent leakage. When the gate valve needs to replace the rubber ring after working for a period of time, the telescopic rod drives the magnetic ring to move, and drives the magnet to move in the direction away from the rubber ring, so the magnet drives the sleeve to slide, and the sleeve drives the gear to move. The gear will rotate at the same time to drive the support rod away from the rubber ring. Since the support rod is inclined, the support rod will also leave the rubber ring in the vertical direction away from the rubber ring. At this time, open the lower sealing ring, and the rubber ring has no obstacles. The rubber ring can be directly taken out from the bottom of the gate valve, which speeds up the replacement speed and improves the performance of the gate valve. When liquid flows through the support cylinder, it will drive the fan blade to rotate, and the fan blade drives the threaded rod to rotate. Since the magnet on the sleeve is subjected to the magnetic force of the magnetic ring, the sleeve will press the gear to prevent it from moving, and the threaded rod drives the gear to rotate, which drives the support rod to rotate, and the support rod drives the support ball to rotate on the sealing ring, providing support for it from various points of the sealing ring to prevent it from leaving the working position under the movement of the blade and causing leakage, thereby improving the sealing performance of the device.

[0011] The present invention provides a high-performance zero-leakage knife gate valve. It has the following beneficial effects:

[0012] 1. This high-performance zero-leakage knife gate valve is provided with a sealing component. The outer shell provides support and connection for the gate valve. The knife gate component controls the opening and closing of the gate valve. The isolation tube receives the knife gate to control the opening and closing. The sealing component provides sealing for the contact surface and gap between the knife gate and the isolation tube. The supporting component provides support for the sealing component to ensure that the sealing component can always maintain a working state and is not affected by the movement of the blade.

[0013] 2. This high-performance zero-leakage knife gate valve is provided with a sealing component. The inner walls of the lower sealing ring and the upper sealing ring are both provided with grooves. The rubber ring is placed in the groove to provide a seal for the gate knife, improve the sealing and prevent leakage. If the gate knife movement causes damage to the rubber ring after working for a period of time, the rubber ring needs to be replaced. The locking nut can be turned to open the lower sealing ring and the rubber ring can be directly taken out from the bottom of the gate valve. There is no need to disassemble the gate valve from the pipeline system. The replacement is simple, saving time and improving the performance of the gate valve.

[0014] 3. This is a high-performance zero-leakage knife gate valve, which is provided with a supporting structure. The telescopic rod is extended and retracted to drive the slider to slide, and the magnetic ring to slide. The sliding of the magnetic ring will drive the magnet in the supporting tube to slide through magnetic force. The sliding of the magnet drives the sleeve to slide. The sliding of the sleeve on the threaded rod will drive the gear to move on the threaded rod. When the sleeve drives the gear to move toward the rubber ring, the gear will move on the threaded rod and rotate under the action of the threaded rod. During the rotation, the gear drives the supporting rod to extend toward the rubber ring, and the connecting tube will control the direction of the supporting rod so that it always moves toward the rubber ring. The supporting ball at the end of the supporting rod contacts the rubber ring, and the telescopic rod stops moving. The supporting ball presses the rubber ring toward the sealing ring and the gate knife from various points to maintain its working state, prevent the gate knife movement from affecting the rubber ring, ensure the sealing effect, and prevent leakage.

[0015] 4. This is a high-performance zero-leakage knife gate valve, which is provided with fan blades. When liquid flows through the supporting cylinder, the fan blades will be driven to rotate, and the fan blades will drive the threaded rod to rotate. Since the magnet on the sleeve is subjected to the magnetic force of the magnetic ring, the sleeve will press the gear to prevent it from moving. The threaded rod drives the gear to rotate, and drives the supporting rod to rotate. The supporting rod drives the supporting ball to rotate on the sealing ring, providing support to the sealing ring from various points to prevent it from leaving the working position under the movement of the blade and causing leakage, thereby improving the sealing performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a high-performance zero-leakage knife gate valve of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the supporting member of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the knife blade component of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the isolation tube of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the sealing component of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the support tube of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the threaded rod of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the support rod of the present invention.

[0024] In the figure: 1. outer shell; 2. gate knife component; 3. isolation tube; 4. sealing component; 5. supporting component; 21. cylinder; 22. gate knife; 31. tube body; 32. mounting ring; 33. arc groove; 41. upper sealing ring; 42. lower sealing ring; 43. locking nut; 44. groove; 45. rubber ring; 51. supporting tube; 52. slide groove; 53. slider; 54. telescopic rod; 55. magnetic ring; 56. threaded rod; 57. fan blade; 58. supporting structure; 581. sleeve; 582. magnet; 583. gear; 584. connecting tube; 585. supporting rod; 586. supporting ball. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] For the first embodiment, please refer to Figure 1-Figure 2 The present invention provides a technical solution: a high-performance zero-leakage knife gate valve, comprising a shell 1, a knife gate component 2 is fixedly connected to the top of the shell 1, an isolation tube 3 is fixedly connected to the bottom of the shell 1, a sealing component 4 is fixedly connected to the side of the isolation tube 3, and a supporting component 5 is fixedly connected to the side of the sealing component 4. The supporting component 5 can provide support for the sealing component 4 to strengthen the seal and prevent leakage. The shell 1 provides support and connection for the gate valve. The knife gate component 2 controls the opening and closing of the gate valve. The isolation tube 3 receives the knife gate 22 to control the opening and closing. The sealing component 4 provides sealing for the contact surface and gap between the knife gate 22 and the isolation tube 3. The supporting component 5 provides support for the sealing component 4 to ensure that the sealing component 4 can always maintain a working state and is not affected by the movement of the blade.

[0027] During operation, the gate valve is connected to the pipeline system. When the gate valve needs to be closed, the gate knife component 2 descends and contacts the isolation pipe 3. When the gate valve needs to be opened, the gate knife component 2 rises away from the isolation pipe 3. The sealing component 4 provides a seal for the contact surface between the gate knife 22 and the isolation pipe 3 on the side. The supporting component 5 provides support for the sealing component 4 to ensure that the sealing component 4 can always maintain a working state.

[0028] For the second embodiment, please refer to Figure 3-Figure 5The present invention provides a technical solution: the gate knife component 2 includes a cylinder 21, the bottom of the cylinder 21 is fixedly connected to the outer shell 1, and the bottom of the cylinder 21 is fixedly connected to a gate knife 22, and the bottom outer edge of the gate knife 22 is arc-shaped. The cylinder 21 controls the gate knife 22 to rise or fall. The gate knife 22 rises and leaves the isolation tube 3, and the gate valve opens. The gate knife 22 falls and contacts the isolation tube 3, and the gate valve closes.

[0029] The isolation tube 3 includes a tube body 31, the top of the tube body 31 is fixedly connected to the outer shell 1, the side of the tube body 31 is fixedly connected to a mounting ring 32, the inner wall of the tube body 31 is provided with an arc groove 33, the inner wall of the arc groove 33 cooperates with the gate knife 22, the gate knife 22 descends and matches with the arc groove 33 of the tube body 31 to complete the closing of the gate valve, and the arc groove 33 is provided on the inner wall of the tube body 31 to cooperate with the gate knife 22 with an arc bottom to improve the sealing performance.

[0030] The sealing member 4 comprises an upper sealing ring 41, the side of which is fixedly connected to the pipe body 31, the side of the upper sealing ring 41 is rotatably connected to the lower sealing ring 42, the side of the upper sealing ring 41 away from the lower sealing ring 42 is threadedly connected to a locking nut 43, the inner wall of the upper sealing ring 41 is fixedly connected to a rubber ring 45, the inner wall of the lower sealing ring 42 is provided with a groove 44, the groove 44 is in contact with the rubber ring 45, the inner walls of the lower sealing ring 42 and the upper sealing ring 41 are both provided with grooves 44, the rubber ring 45 is placed in the groove 44, provides sealing for the gate knife 22, improves the sealing performance, and prevents leakage, if after working for a period of time, the movement of the gate knife 22 causes damage to the rubber ring 45, and the rubber ring 45 needs to be replaced, the locking nut 43 can be rotated, the lower sealing ring 42 can be opened, and the rubber ring 45 can be directly taken out from the bottom of the gate valve, and the gate valve does not need to be disassembled from the pipeline system, the replacement is simple, time is saved, and the gate valve performance is improved.

[0031] During operation, the gate valve is installed in the pipeline system through the mounting ring 32, and the cylinder 21 operates the gate knife 22 to rise or fall. The gate knife 22 rises and leaves the isolation tube 3, and the gate valve is opened. The gate knife 22 falls and contacts the isolation tube 3, and the gate valve is closed. The rubber ring 45 is placed in the groove 44 of the sealing ring to provide a seal for the gate knife 22, improve the sealing performance, and prevent leakage. If the movement of the gate knife 22 causes damage to the rubber ring 45 after working for a period of time, the rubber ring 45 needs to be replaced. The locking nut 43 can be rotated to open the lower sealing ring 42, and the rubber ring 45 can be directly removed from the bottom of the gate valve without removing the gate valve from the pipeline system.

[0032] For the third embodiment, please refer to Figure 6-Figure 8The present invention provides a technical solution: the supporting member 5 includes a supporting tube 51, the side of the supporting tube 51 is fixedly connected to the upper sealing ring 41, the outer surface of the supporting tube 51 is provided with a slide groove 52, the inner wall of the slide groove 52 is slidably connected with a slider 53, the top of the slider 53 is fixedly connected with a magnetic ring 55, the side of the slider 53 is fixedly connected with a telescopic rod 54, the bottom of the telescopic rod 54 is fixedly connected to the supporting tube 51, the telescopic rod 54 is extended and retracted to drive the slider 53 to slide, and drive the magnetic ring 55 to slide, and provide power for the supporting structure 58 in the supporting tube 51 through magnetic force.

[0033] The inner wall of the support tube 51 is rotatably connected to a threaded rod 56 through a connecting frame, the end face of the threaded rod 56 is fixedly connected to a fan blade 57, and the end of the threaded rod 56 away from the fan blade 57 is fixedly connected to a support structure 58. When liquid flows through the support tube 51, it will drive the fan blade 57 to rotate, and the fan blade 57 will drive the threaded rod 56 to rotate, and the threaded rod 56 will drive the support structure 58 to rotate, providing support for each point of the sealing component 4 during movement, thereby improving the sealing performance and preventing leakage.

[0034] The supporting structure 58 includes a sleeve 581, the inner wall of the sleeve 581 is slidably connected to the threaded rod 56, the inner wall of the sleeve 581 is rotatably connected to a gear 583, the inner wall of the gear 583 is threadedly connected to the threaded rod 56, a supporting rod 585 is meshed on the side of the gear 583, a connecting cylinder 584 is fixedly connected to the outer surface of the sleeve 581, the inner wall of the connecting cylinder 584 is slidably connected to the supporting rod 585, the end of the supporting rod 585 away from the gear 583 is rotatably connected to a supporting ball 586, the end of the sleeve 581 away from the gear 583 is fixedly connected to a magnet 582, the magnet 582 and the magnetic ring 55 are in the same plane, the outer surface of the supporting ball 586 is in contact with the rubber ring 45, and the telescopic rod 54 is extended and retracted to drive the slider 53 slides, driving the magnetic ring 55 to slide. The sliding of the magnetic ring 55 drives the magnet 582 in the supporting tube 51 to slide through the magnetic force. The sliding of the magnet 582 drives the sleeve 581 to slide. The sliding of the sleeve 581 on the threaded rod 56 drives the gear 583 to move on the threaded rod 56. When the sleeve 581 drives the gear 583 to move toward the rubber ring 45, the gear 583 moves on the threaded rod 56 and is rotated by the threaded rod 56. During the rotation, the gear 583 drives the supporting rod 585 to extend toward the rubber ring 45. The connecting tube 584 controls the direction of the supporting rod 585 so that it always moves toward the rubber ring 45. The supporting ball 586 at the end of the supporting rod 585 contacts the rubber ring 45. 4 stops moving, and the supporting ball 586 presses the rubber ring 45 toward the sealing ring and the gate knife 22 from various points to maintain its working state, prevent the movement of the gate knife 22 from affecting the rubber ring 45, ensure the sealing effect, and prevent leakage. When the gate valve has been working for a period of time and the rubber ring 45 needs to be replaced, the telescopic rod 54 drives the magnetic ring 55 to move, and drives the magnet 582 to move away from the rubber ring 45, so that the magnet 582 drives the sleeve 581 to slide, and the sleeve 581 drives the gear 583 to move, and the gear 583 will rotate at the same time to drive the supporting rod 585 away from the rubber ring 45. Since the supporting rod 585 is inclined, the supporting rod 585 will also leave the rubber ring 45 in the vertical direction when it is away from the rubber ring 45. At this time, open the lower sealing ring 42, and the rubber ring 45 has no obstruction. The rubber ring 45 can be directly taken out from the bottom of the gate valve, which speeds up the replacement and improves the performance of the gate valve. Liquid flows through the support tube 51, which will drive the fan blades 57 to rotate, and the fan blades 57 drive the threaded rod 56 to rotate. Since the magnet 582 on the sleeve 581 is affected by the magnetic force of the magnetic ring 55, the sleeve 581 will press the gear 583 to prevent it from moving, and the threaded rod 56 drives the gear 583 to rotate, and drives the support rod 585 to rotate. The support rod 585 drives the supporting ball 586 to rotate on the sealing ring, providing support to the sealing ring from various points to prevent it from leaving the working position under the movement of the blade and causing leakage, thereby improving the sealing performance of the device.

[0035] During operation, the telescopic rod 54 is extended and retracted to drive the slider 53 to slide, and the magnetic ring 55 to slide. The sliding of the magnetic ring 55 drives the magnet 582 in the support tube 51 to slide through the magnetic force. The sliding of the magnet 582 drives the sleeve 581 to slide. The sliding of the sleeve 581 on the threaded rod 56 drives the gear 583 to move on the threaded rod 56. When the sleeve 581 drives the gear 583 to move toward the rubber ring 45, the gear 583 moves on the threaded rod 56 and is rotated by the threaded rod 56. During the rotation, the gear 583 drives the support rod 585 When the rubber ring 45 is extended, the connecting tube 584 controls the direction of the supporting rod 585 to make it move toward the rubber ring 45. The supporting ball 586 at the end of the supporting rod 585 contacts the rubber ring 45, and the telescopic rod 54 stops moving. The supporting ball 586 presses the rubber ring 45 toward the sealing ring and the gate knife 22 from various points to maintain its working state, prevent the movement of the gate knife 22 from affecting the rubber ring 45, ensure the sealing effect, and prevent leakage. When the rubber ring 45 needs to be replaced after the gate valve has worked for a period of time, the telescopic rod 54 drives the magnetic ring 5 5 moves, driving the magnet 582 to move away from the rubber ring 45, so the magnet 582 drives the sleeve 581 to slide, the sleeve 581 drives the gear 583 to move, and the gear 583 rotates at the same time to drive the support rod 585 away from the rubber ring 45. Since the support rod 585 is inclined, the support rod 585 will move away from the rubber ring 45 in the vertical direction. At this time, the lower sealing ring 42 is opened, and the rubber ring 45 has no obstacles. The rubber ring 45 can be directly taken out from the bottom of the gate valve, which speeds up the replacement speed and improves the performance of the gate valve. Liquid flows through the support tube 51, which drives the fan blades 57 to rotate, and the fan blades 57 drive the threaded rod 56 to rotate. Since the magnet 582 on the sleeve 581 is subjected to the magnetic force of the magnetic ring 55, the sleeve 581 will press the gear 583 to prevent it from moving. The threaded rod 56 drives the gear 583 to rotate, and drives the support rod 585 to rotate. The support rod 585 drives the supporting ball 586 to rotate on the sealing ring, providing support to the sealing ring from various points to prevent it from leaving the working position under the movement of the blade and causing leakage, thereby improving the sealing performance of the device.

[0036] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A high performance zero leakage knife gate valve, comprising a housing (1), characterized in that: The top of the housing (1) is fixedly connected to a knife component (2), the bottom of the housing (1) is fixedly connected to an isolation tube (3), the side of the isolation tube (3) is fixedly connected to a sealing component (4), and the side of the sealing component (4) is fixedly connected to a supporting component (5), the supporting component (5) can provide support for the sealing component (4) to strengthen the seal and prevent leakage; The isolation tube (3) comprises a tube body (31), the top of the tube body (31) is fixedly connected to the outer shell (1), the side of the tube body (31) is fixedly connected to a mounting ring (32), the inner wall of the tube body (31) is provided with an arc groove (33), and the inner wall of the arc groove (33) cooperates with the gate knife (22); The sealing component (4) comprises an upper sealing ring (41), the side surface of the upper sealing ring (41) being fixedly connected to the tube body (31), the side surface of the upper sealing ring (41) being rotatably connected to a lower sealing ring (42), a locking nut (43) being threadedly connected to a side of the upper sealing ring (41) away from the lower sealing ring (42), a rubber ring (45) being fixedly connected to the inner wall of the upper sealing ring (41), a groove (44) being provided on the inner wall of the lower sealing ring (42), and the groove (44) being in contact with the rubber ring (45); The supporting member (5) comprises a supporting tube (51), the side of the supporting tube (51) is fixedly connected to the upper sealing ring (41), the outer surface of the supporting tube (51) is provided with a slide groove (52), the inner wall of the slide groove (52) is slidably connected to a slider (53), the top of the slider (53) is fixedly connected to a magnetic ring (55), the side of the slider (53) is fixedly connected to a telescopic rod (54), and the bottom of the telescopic rod (54) is fixedly connected to the supporting tube (51); The inner wall of the support cylinder (51) is rotatably connected to a threaded rod (56) via a connecting frame, the end surface of the threaded rod (56) is fixedly connected to a fan blade (57), and one end of the threaded rod (56) away from the fan blade (57) is fixedly connected to a support structure (58); The supporting structure (58) comprises a sleeve (581), the inner wall of the sleeve (581) is slidably connected to the threaded rod (56), the inner wall of the sleeve (581) is rotatably connected to a gear (583), the inner wall of the gear (583) is threadedly connected to the threaded rod (56), a supporting rod (585) is meshed on the side of the gear (583), a connecting tube (584) is fixedly connected to the outer surface of the sleeve (581), the inner wall of the connecting tube (584) is slidably connected to the supporting rod (585), and one end of the supporting rod (585) away from the gear (583) is rotatably connected to a supporting ball (586); One end of the sleeve (581) away from the gear (583) is fixedly connected to a magnet (582), and the magnet (582) and the magnetic ring (55) are located in the same plane.

2. A high performance zero leakage knife gate valve according to claim 1, characterized in that: The gate blade component (2) comprises a cylinder (21), the bottom of the cylinder (21) is fixedly connected to the housing (1), the bottom of the cylinder (21) is fixedly connected to a gate blade (22), and the bottom outer edge of the gate blade (22) is arc-shaped.

3. A high performance zero leakage knife gate valve according to claim 1, characterized in that: The outer surface of the supporting ball (586) is in contact with the rubber ring (45).

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