Bidirectional sealing two-piece type knife gate valve

Abstract

The invention relates to the technical field of knife gate valves, and discloses a bidirectional sealing two-piece type knife gate valve which comprises a butt joint assembly used for being in butt joint with a pipeline, a sealing assembly used for achieving a sealing effect is arranged at the upper end of the butt joint assembly, and a knife switch blocking mechanism used for blocking internal circulation and transmission of the butt joint assembly is longitudinally and movably arranged in the butt joint assembly. A driving mechanism drives a transmission shaft to rotate and transmit to a non-contact magnetic coupling transmission mechanism, a driving coupling sleeve rotates to form magnetic coupling, a transmission permanent magnet drives a transmission coupling shaft to rotate synchronously, and the power is transmitted to a transmission column in a cleaning assembly through a three-section universal joint, so that a scraper continuously cleans the surface of a positioning disc, and deposit accumulation is prevented; smooth opening and closing of the knife switch are guaranteed, the equipment operation period is remarkably prolonged, the maintenance frequency is reduced, the whole system integrates opening and closing, sealing and cleaning, power transmission is efficient, contact and abrasion are avoided, and the problems of deposition and attachment, opening and closing clamping stagnation, maintenance difficulty and the like of a traditional knife gate valve are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of knife gate valves, in particular to a two-way sealing two-piece knife gate valve. Background Art

[0002] The two-piece, two-way sealed knife gate valve is an industrial valve with a compact structure and excellent sealing performance. It is widely used in media such as ore pulp, paper pulp, chemical industry, and sewage treatment. It consists of two symmetrical valve bodies with a knife-shaped gate disc clamped in the middle, which can achieve two-way medium cutoff and has sealing functions in both forward and reverse directions. Compared with the one-way sealing valve, the two-way sealing knife gate valve has no directional restrictions during installation and is more suitable for working conditions with uncertain flow direction or frequent direction switching. It has flexible opening and closing and easy maintenance. It is particularly suitable for occasions containing particles, fibers or high-viscosity materials. It is one of the key control devices in the conveying system.

[0003] In the prior art, the traditional two-way sealed two-piece knife gate valve has certain structural defects during operation, especially in the design of the gate area. Since the gate surface needs to directly contact the conveying medium, such as slurry, paper pulp, chemical materials or sewage, solid particles, impurities or high-viscosity components in the medium are very easy to deposit and adhere to the gate surface. After long-term operation, these deposits gradually accumulate, which will make the gate surface thicker, resulting in the gate opening and closing not being smooth, and even jamming, affecting the normal operation of the valve. In addition, long-term adhesion of deposits may also cause wear or deformation of the sealing surface, reduce sealing performance, and cause the risk of medium leakage. What is even more inconvenient is that in the daily maintenance process, in order to clean the deposits or deal with the jamming problem, it is often necessary to disassemble the entire knife gate valve, which is time-consuming and labor-intensive, affecting the equipment operation efficiency, increasing maintenance costs, and bringing interruption risks to the continuous working system. For this reason, we propose a two-way sealed two-piece knife gate valve. Summary of the Invention

[0004] The object of the present invention is to provide a two-way sealing two-piece knife gate valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a two-way sealed two-piece knife gate valve, comprising a docking assembly for docking with a pipeline, a sealing assembly for sealing is arranged on the upper end of the docking assembly, a knife gate blocking mechanism for blocking the circulation transmission inside the docking assembly is longitudinally arranged inside the docking assembly, cleaning assemblies for cleaning the surface attachments of the knife gate blocking mechanism are arranged at both ends of the docking assemblies on both sides of the knife gate blocking mechanism, a driving mechanism for driving the knife gate blocking mechanism and the two cleaning assemblies to operate is arranged on the upper end of the sealing assembly, and two contactless magnetic coupling transmission mechanisms for sealing and transmitting kinetic energy and driving the two cleaning assemblies to operate are arranged at the center of the outer side of the docking assembly near the two ends.

[0006] Preferably, the docking assembly includes a sealed cavity, wherein guide strips are fixedly connected to the centers of the two inner walls opposite to each other, and feed pipes are fixedly sleeved on both sides of the sealed cavity, and mounting holes are opened at the upper centers of the two feed pipes.

[0007] Preferably, the ends of the two conveying pipes that are away from each other on the outside are fixedly connected with docking flange rings, the upper centers of the two sides of the sealing cavity are fixedly connected with lower ears, and the lower centers of the two inner walls opposite to each other in the sealing cavity are provided with sealing grooves, and the first sealing rings are sleeved inside the two sealing grooves.

[0008] Preferably, the sealing assembly includes a rectangular pressure ring, the rectangular pressure ring device is at the upper end of the sealing cavity, a sealing cover is fixedly sleeved at the center of the inner part of the rectangular pressure ring, and a sealing gasket is placed between the rectangular pressure ring and the sealing cavity, the rectangular pressure ring and the sealing cavity are fastened together by a plurality of bolts, a sealing tube is fixedly sleeved at the upper center of the inner part of the sealing cover, a sealing rotating ring is fixedly sleeved at the center of the inner part of the sealing tube, a screw is fixedly sleeved inside the sealing rotating ring, and an upper ear piece is fixedly connected at the center of each side of the sealing cover away from each other.

[0009] Preferably, the knife gate blocking mechanism includes an internal thread block, which is threadedly sleeved on the outside of the screw rod, and the two sides of the internal thread block that are away from each other are fixedly connected with connecting plates, the lower ends of the two connecting plates are fixedly connected with docking disks, a middle connecting column is fixedly connected at the center between the two docking disks, and a movable hole for accommodating the screw rod is longitudinally penetrated at the center of the middle connecting column, and the middle areas on both sides of the two docking disks that are away from each other are fixedly connected with splints.

[0010] Preferably, the two clamps on one side are clamped on the outside of the guide bar on one side, and the two clamps on the other side are clamped on the outside of the guide bar on the other side. The four clamps and the two guide bars are in sliding contact and play a longitudinal sliding guiding role. The centers of the two docking plates on both sides away from each other are fixedly connected with positioning discs, and the outer sides of the two positioning discs are fixedly sleeved with second sealing rings. The sides of the two second sealing rings away from each other are in abutment contact with the sides of the two first sealing rings close to each other, and the two second sealing rings are in detachable contact with the two first sealing rings.

[0011] Preferably, the driving mechanism includes two transmission shafts and a driving gear, and the two transmission shafts are rotatably sleeved on the lower ear and upper ear on one side and the lower ear and upper ear on the other side through bearings, and the driving gear fixed sleeve is arranged at the upper center of the outer side of the screw rod, and the center of the upper end of the driving gear is fixedly connected with a lower limit plate, and the two transmission gears and the driving gear are fixedly sleeved at the upper center of the outer side of the two transmission shafts, and there is gear meshing transmission between the two transmission gears and the driving gear, and the center of the upper end of the lower limit plate is fixedly connected with a threaded column, and the upper end of the threaded column is fixedly connected with an upper limit plate, and a plurality of guide rods are arranged in a ring at the edge of the inner center of the driving gear, and a handwheel is provided with a longitudinal sliding sleeve on the outer side of the plurality of guide rods, and the threaded sleeve at the inner center of the handwheel is arranged on the outside of the threaded column.

[0012] Preferably, the cleaning assembly includes a support plate and a lower support frame, the support plate is fixedly connected to one end of the center of the lower inner wall of one of the feed pipes, the lower support frame is fixedly connected to the center of the upper inner wall of the feed pipe away from one end of the support plate, and a transmission column is rotatably sleeved on the upper center of the support plate through a bearing, a plurality of scrapers are fixedly connected in a ring arrangement on the outer side of the transmission column near one end of the positioning disc, and the plurality of scrapers are slidably fitted with the side close to each other of the positioning disc, a three-section universal joint is rotatably sleeved on the lower center of the lower support frame through a bearing, and the three-section universal joint is fixedly connected to the transmission column away from the multiple scrapers at one end away from the lower support frame.

[0013] Preferably, the contactless magnetic coupling transmission mechanism includes an outer isolation tube, an upper support frame and a transmission coupling shaft, the outer isolation tube fixed sleeve is arranged inside one of the mounting holes, the upper support frame is fixedly connected to the center of the upper end of the feed pipe on the corresponding side, the transmission coupling shaft is fixedly connected to the upper part of the three-section universal joint near one end of the lower support frame, the upper support frame is fixedly sleeved at the lower center thereof, and the lower sealing ring is fixedly sleeved inside the lower sealing ring, the transmission coupling shaft sleeve is arranged inside the inner isolation tube, and the outer wall of the transmission coupling shaft and the inner wall of the inner isolation tube are contactlessly sleeved, and the inner isolation tube is fixedly sleeved at the upper center thereof.

[0014] Preferably, a plurality of transmission permanent magnets are fixedly embedded in a ring arrangement at the inner center near the edge of the transmission coupling shaft, a synchronization shaft is rotatably sleeved with a bearing at the upper center of the upper support frame, and the lower end of the synchronization shaft is fixedly connected to a drive coupling sleeve, the drive coupling sleeve is rotatably sleeved on the outer isolation tube outside the inner isolation tube, and the outer wall of the drive coupling sleeve and the inner wall of the outer isolation tube are contactlessly sleeved, the inner wall of the drive coupling sleeve and the outer wall of the isolation cover are contactlessly sleeved, a plurality of drive permanent magnets are fixedly embedded in a ring arrangement at the inner center near the edge of the drive coupling sleeve, the plurality of drive permanent magnets and the plurality of transmission permanent magnets are magnetically attracted to each other, and the upper end of the synchronization shaft is fixedly connected to the lower end of the transmission shaft on the corresponding side.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This bidirectional sealed two-piece knife gate valve achieves an organic combination of efficient sealing and self-cleaning functions in its structural design. During the overall operation, the operating handwheel drives the screw to rotate, and the screw thread drives the internal thread block, driving the knife gate blocking mechanism to move up and down along the guide strip to achieve medium blocking or circulation. The sealing assembly uses a multiple sealing structure to cooperate with the first sealing ring in the sealing chamber and the second sealing ring on the knife gate blocking mechanism to achieve dynamic sealing, preventing medium leakage and improving reliability. At the same time, the drive mechanism drives the transmission shaft to rotate, which is transmitted to the contactless magnetic coupling transmission mechanism. The drive coupling sleeve rotates to form magnetic coupling, and the transmission permanent magnet drives the transmission coupling shaft to rotate synchronously. This power is transmitted to the transmission column in the cleaning assembly through a three-section universal joint, so that the scraper continuously cleans the surface of the positioning disc, preventing sediment accumulation, ensuring smooth opening and closing of the knife gate, significantly extending the equipment operation cycle and reducing maintenance frequency. The entire system realizes the trinity of opening and closing, sealing, and cleaning. The transmission relationship is strict, the power transmission is efficient, contactless, and wear-free, effectively reducing the problems of deposit adhesion, opening and closing jamming, and maintenance difficulties of traditional knife gate valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of a two-way sealing two-piece knife gate valve; Figure 2 A schematic diagram of the three-dimensional structure of a two-way sealing two-piece knife gate valve from another perspective; Figure 3 This is a schematic diagram of the three-dimensional split structure of a two-piece bidirectional sealing knife gate valve; Figure 4 Schematic diagram of the three-dimensional structure of the contactless magnetic coupling transmission mechanism of the present invention; Figure 5 This is a schematic diagram of the three-dimensional split structure of the docking assembly of the present invention; Figure 6 This is a schematic diagram of the three-dimensional disassembled structure of the sealing assembly of the present invention; Figure 7It is a schematic diagram of the three-dimensional disassembled structure of the knife switch blocking mechanism of the present invention; Figure 8 A schematic diagram of the three-dimensional disassembled structure of the knife switch blocking mechanism of the present invention from another perspective; Figure 9 Schematic diagram of the three-dimensional split structure of the driving mechanism of the present invention; Figure 10 Schematic diagram of the three-dimensional structure of the cleaning component of the present invention; Figure 11 This is a schematic diagram of the three-dimensional disassembled structure of the cleaning component of the present invention; Figure 12 Schematic diagram of the three-dimensional split structure of the contactless magnetic coupling transmission mechanism of the present invention; Figure 13 It is a schematic diagram of the three-dimensional structure of the inner isolation tube of the present invention.

[0017] In the figure: 1, docking assembly; 101, sealing chamber; 102, guide bar; 103, feed pipe; 104, mounting hole; 105, docking flange ring; 106, lower ear piece; 107, sealing groove; 108, first sealing ring; 2. Sealing assembly; 201. Rectangular pressure ring; 202. Sealing cover; 203. Sealing gasket; 204. Sealing tube; 205. Sealing ring; 206. Screw; 207. Upper ear piece; 3. Knife gate blocking mechanism; 301. Internal thread block; 302. Connecting piece; 303. Docking plate; 304. Middle connecting column; 305. Movable hole; 306. Clamping plate; 307. Positioning disc; 308. Second sealing ring; 4. Driving mechanism; 401. Transmission shaft; 402. Driving gear; 403. Lower limit plate; 404. Transmission gear; 405. Threaded column; 406. Upper limit plate; 407. Guide rod; 408. Handwheel; 5. Cleaning assembly; 501. Support plate; 502. Lower support frame; 503. Transmission column; 504. Scraper; 505. Three-section universal joint; 6. Contactless magnetic coupling transmission mechanism; 601. External isolation tube; 602. Upper support frame; 603. Transmission coupling shaft; 604. Lower sealing ring; 605. Internal isolation tube; 606. Isolation cover; 607. Transmission permanent magnet; 608. Synchronous shaft; 609. Drive coupling sleeve; 6010. Drive permanent magnet. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1-4 As shown, the present invention provides a technical solution: a two-way sealed two-piece knife gate valve, comprising a docking component 1 for docking with a pipeline, a sealing component 2 for sealing is arranged on the upper end of the docking component 1, a knife gate blocking mechanism 3 for blocking the circulation and transmission inside the docking component 1 is longitudinally arranged inside the docking component 1, cleaning components 5 for cleaning the surface attachments of the knife gate blocking mechanism 3 are arranged at both ends of the docking components 1 on both sides of the knife gate blocking mechanism 3, a driving mechanism 4 for driving the knife gate blocking mechanism 3 and the two cleaning components 5 to operate is arranged on the upper end of the sealing component 2, and two contactless magnetic coupling transmission mechanisms 6 for sealing and transmitting kinetic energy and driving the two cleaning components 5 to operate are arranged at the center of the outer side of the docking component 1 near the two ends.

[0020] Furthermore, the bidirectional sealing two-piece knife gate valve realizes an organic combination of high-efficiency sealing and self-cleaning functions in its structural design. During the overall working process, the operating handwheel 408 drives the screw rod 206 to rotate, and the screw rod 206 transmits the internal thread block 301 through the thread transmission, driving the knife gate blocking mechanism 3 to move up and down along the guide strip 102 to achieve the blocking or circulation of the medium. The sealing component 2 cooperates with the first sealing ring 108 in the sealing chamber 101 and the second sealing ring 308 on the knife gate blocking mechanism 3 through the multiple sealing structures to perform dynamic sealing to prevent medium leakage and improve reliability. At the same time, the driving mechanism 4 drives the transmission shaft 401 to rotate, and the transmission is to The contact-type magnetic coupling transmission mechanism 6 drives the coupling sleeve 609 to rotate to form magnetic coupling, and the transmission permanent magnet 607 drives the transmission coupling shaft 603 to rotate synchronously. This power is transmitted to the transmission column 503 in the cleaning component 5 through the three-section universal joint 505, so that the scraper 504 continuously cleans the surface of the positioning disc 307, prevents sediment accumulation, ensures smooth opening and closing of the knife gate, significantly extends the equipment operation cycle and reduces the number of maintenance times. The entire system realizes the trinity of opening, closing, sealing and cleaning, with a strict transmission relationship, efficient power transmission without contact and wear, and effectively reduces the problems of sediment adhesion, opening and closing jamming, and maintenance difficulties of traditional knife gate valves.

[0021] In the preferred technical solution of this embodiment, please refer to Figure 5As shown, the docking assembly 1 includes a sealing cavity 101, and guide strips 102 are fixedly connected at the centers of the two inner walls opposite to each other of the sealing cavity 101, and feed pipes 103 are fixedly sleeved on both sides of the interior of the sealing cavity 101, and mounting holes 104 are provided at the upper centers of the two feed pipes 103, and docking flange rings 105 are fixedly connected at the ends of the outer sides of the two feed pipes 103 away from each other, and lower ear pieces 106 are fixedly connected at the upper centers of the two sides of the sealing cavity 101, and sealing grooves 107 are provided at the lower centers of the two inner walls opposite to each other of the sealing cavity 101, and first sealing rings 108 are sleeved inside the two sealing grooves 107.

[0022] Furthermore, the docking component 1 serves as the basic component for connecting the knife gate valve and the pipeline. The sealing cavity 101 inside it provides a closed space for various functional structures. The guide strip 102 is arranged in the sealing cavity 101, so that the knife gate blocking mechanism 3 slides longitudinally along a fixed track during the opening and closing process, ensuring its stable movement and preventing deviation. The feed pipe 103 introduces the medium into the valve cavity and guides it to the downstream of the pipeline. At the same time, the installation space for the cleaning component 5 and the contactless magnetic coupling transmission mechanism 6 is provided through the installation hole 104. The docking flange ring 105 realizes a tight connection with the pipeline to prevent medium leakage. The lower ear piece 106 provides installation support for the driving mechanism 4. The first sealing ring 108 arranged in the sealing groove 107 contacts the second sealing ring 308 on the knife gate blocking mechanism 3 to ensure that the medium does not leak during the opening and closing process, effectively improving the overall sealing performance.

[0023] In the preferred technical solution of this embodiment, please refer to Figure 6 As shown, the sealing assembly 2 includes a rectangular pressure ring 201, which is installed at the upper end of the sealing cavity 101. A sealing cover 202 is fixedly sleeved at the center of the rectangular pressure ring 201, and a sealing gasket 203 is placed between the rectangular pressure ring 201 and the sealing cavity 101. The rectangular pressure ring 201 and the sealing cavity 101 are fastened together by multiple bolts. A sealing tube 204 is fixedly sleeved at the upper center of the sealing cover 202, and a sealing rotating ring 205 is fixedly sleeved at the center of the sealing tube 204. A screw rod 206 is fixedly sleeved inside the sealing rotating ring 205, and an upper ear piece 207 is fixedly connected to the center of the side of the sealing cover 202 away from each other.

[0024] Furthermore, the sealing assembly 2 forms an upper sealing structure through a rectangular pressure ring 201, a sealing cover 202, a sealing gasket 203 and a sealing tube 204. The screw 206 longitudinally penetrates the sealing assembly 2 and is sleeved with the sealing tube 204 through a sealing ring 205 to prevent the medium from leaking from the seal when the screw 206 moves. The upper ear piece 207 provides positioning support for the driving mechanism 4 to ensure stable operation of the transmission system. This sealing structure provides efficient sealing for the driving mechanism 4, prevents leakage of the medium or entry of impurities, and contributes to the long-term operation stability of the system.

[0025] In the preferred technical solution of this embodiment, please refer to Figures 7-8 As shown, the knife gate blocking mechanism 3 includes an internal thread block 301, which is threadedly sleeved on the outside of the screw rod 206, and the two sides of the internal thread block 301 away from each other are fixedly connected with connecting pieces 302, and the lower ends of the two connecting pieces 302 are fixedly connected to docking plates 303, and a middle connecting column 304 is fixedly connected at the center between the two docking plates 303, and a movable hole 305 for accommodating the screw rod 206 is longitudinally penetrated at the center of the middle connecting column 304, and a clamping plate 306 is fixedly connected to the middle area of ​​the two sides of the two docking plates 303 away from each other, and the two clamping plates 306 on one side are clamped in one of them. The outside of the guide strip 102 on one side, and the two clamping plates 306 on the other side are clamped on the outside of the guide strip 102 on the other side. The four clamping plates 306 and the two guide strips 102 are in sliding contact with each other and play a longitudinal sliding guiding role. The centers of the two docking plates 303 on both sides away from each other are fixedly connected with positioning discs 307, and the outsides of the two positioning discs 307 are fixedly sleeved with second sealing rings 308. The side of the two second sealing rings 308 away from each other is in abutment contact with the side of the two first sealing rings 108 close to each other, and the two second sealing rings 308 are in detachable contact with the two first sealing rings 108.

[0026] Furthermore, the screw rod 206 rotates to drive the threaded internally threaded block 301 up and down. The internally threaded block 301, in conjunction with the connecting piece 302, docking plate 303, and central connecting column 304, achieves the up and down movement of the integrated knife gate blocking mechanism 3, thereby blocking or opening the flow of medium within the docking assembly 1. The clamping plate 306 ensures an accurate movement path through sliding contact with the guide bar 102. The positioning disc 307 and the second sealing ring 308 cooperate with the first sealing ring 108 to achieve a sealed closure, ensuring that the medium does not leak from either side of the gate. The detachable contact structure facilitates the recovery of the seal when the gate is opened and closed, thereby improving the seal life.

[0027] In the preferred technical solution of this embodiment, please refer to Figure 9As shown, the driving mechanism 4 includes two transmission shafts 401 and a driving gear 402. The two transmission shafts 401 are rotatably sleeved on the lower ear piece 106 and the upper ear piece 207 on one side and the lower ear piece 106 and the upper ear piece 207 on the other side through bearings. The driving gear 402 is fixedly sleeved on the upper center of the outer side of the screw rod 206. The center of the upper end of the driving gear 402 is fixedly connected with a lower limit plate 403. The upper center of the outer side of the two transmission shafts 401 is fixedly sleeved with a transmission gear 404, and the two transmission gears 404 and the driving gear 402 are gear meshing transmission. The center of the upper end of the lower limit plate 403 is fixedly connected with a threaded column 405, and the upper end of the threaded column 405 is fixedly connected with an upper limit plate 406. A plurality of guide rods 407 are fixedly arranged in a ring at the edge of the inner center of the driving gear 402, and a hand wheel 408 is longitudinally slidably sleeved on the outer side of the plurality of guide rods 407. The inner center of the hand wheel 408 is threadedly sleeved on the outer side of the threaded column 405.

[0028] Furthermore, the handwheel 408 rotates, driving the threaded column 405 to rotate and axially limiting the screw rod 206 through the upper limit plate 406 and the lower limit plate 403. The rotation of the handwheel 408 also causes the driving gear 402 to drive the two transmission gears 404 meshing with it to rotate, and the transmission shaft 401 rotates synchronously to transmit power to the contactless magnetic coupling transmission mechanism 6. The guide rod 407 ensures that the handwheel 408 remains stable during rotation to avoid eccentric rotation affecting the control accuracy. This structure realizes the synchronous transmission of the gate opening and closing and cleaning functions.

[0029] In the preferred technical solution of this embodiment, please refer to Figures 10-11 As shown, the cleaning component 5 includes a support plate 501 and a lower support frame 502. The support plate 501 is fixedly connected to one end of the lower inner wall center of one of the feed pipes 103, and the lower support frame 502 is fixedly connected to the center of the upper inner wall of the feed pipe 103 away from the end of the support plate 501. A transmission column 503 is rotatably sleeved on the upper center of the support plate 501 through a bearing. A plurality of scrapers 504 are fixedly connected in a ring arrangement on the outer side of the transmission column 503 near one end of the positioning disc 307, and the plurality of scrapers 504 slide and fit with the side of the positioning disc 307 close to each other. A three-section universal joint 505 is rotatably sleeved on the lower center of the lower support frame 502 through a bearing. The three-section universal joint 505 is fixedly connected to the end of the transmission column 503 away from the plurality of scrapers 504 at one end away from the lower support frame 502.

[0030] Furthermore, driven by the drive shaft 401, the contactless magnetic coupling transmission mechanism 6 rotates the drive column 503. Multiple scrapers 504 on the drive column 503 contact the surface of the positioning disk 307 and rotate circumferentially to scrape away deposits adhering to the surface of the knife gate blocking mechanism 3, thus preventing the gate plate from thickening due to long-term accumulation. A three-section universal joint 505 transmits rotational power from the drive coupling shaft 603 to the drive column 503, ensuring smooth rotation of the scrapers 504, enhancing cleaning effectiveness, and significantly extending the equipment's trouble-free operation time.

[0031] In the preferred technical solution of this embodiment, please refer to Figures 12-13 As shown, the contactless magnetic coupling transmission mechanism 6 includes an outer isolation tube 601, an upper support frame 602 and a transmission coupling shaft 603. The outer isolation tube 601 is fixedly sleeved inside one of the mounting holes 104, the upper support frame 602 is fixedly connected to the center of the upper end of the feed pipe 103 on the corresponding side, and the transmission coupling shaft 603 is fixedly connected to the upper part of the three-section universal joint 505 near one end of the lower support frame 502. A lower sealing ring 604 is fixedly sleeved at the lower center of the upper support frame 602, and an inner isolation tube 605 is fixedly sleeved inside the lower sealing ring 604. The transmission coupling shaft 603 is sleeved inside the inner isolation tube 605, and the outer wall of the transmission coupling shaft 603 and the inner wall of the inner isolation tube 605 are contactlessly sleeved. An isolation cover 606 is fixedly sleeved at the upper center of the inner isolation tube 605. A plurality of transmission permanent magnets 607 are fixedly embedded in a ring-shaped arrangement at the inner center of the coupling shaft 603 near the edge. A synchronization shaft 608 is rotatably sleeved on the upper center of the upper support frame 602 through a bearing, and the lower end of the synchronization shaft 608 is fixedly connected to a drive coupling sleeve 609. The drive coupling sleeve 609 is rotatably sleeved on the outer isolation tube 601 outside the inner isolation tube 605, and the outer wall of the drive coupling sleeve 609 and the inner wall of the outer isolation tube 601 are contactlessly sleeved, and the inner wall of the drive coupling sleeve 609 and the outer wall of the isolation cover 606 are contactlessly sleeved. A plurality of drive permanent magnets 6010 are fixedly embedded in a ring-shaped arrangement at the inner center of the drive coupling sleeve 609 near the edge. The plurality of drive permanent magnets 6010 and the plurality of transmission permanent magnets 607 are magnetically attracted to each other, and the upper end of the synchronization shaft 608 is fixedly connected to the lower end of the transmission shaft 401 on the corresponding side.

[0032] Furthermore, the rotation of the transmission shaft 401 drives the synchronous shaft 608 to rotate, and the synchronous shaft 608 drives the coupling sleeve 609 to rotate. Multiple driving permanent magnets 6010 form a rotating magnetic field to act on the transmission permanent magnet 607. The transmission permanent magnet 607 drives the transmission coupling shaft 603 to rotate, and the rotational power is transmitted to the transmission column 503 through the three-section universal joint 505, so as to realize the rotation of the scraper 504 of the cleaning component 5. The inner isolation tube 605 and the transmission coupling shaft 603 and the drive coupling sleeve 609 and the outer isolation tube 601 are contactless socketed, ensuring that there is no wear and leakage during power transmission, thereby improving the operating efficiency and stability of the cleaning component 5.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A two-way sealed two-piece knife gate valve, characterized by: The invention comprises a docking assembly (1) for docking with a pipeline, a sealing assembly (2) for performing a sealing function is provided at the upper end of the docking assembly (1), a knife gate blocking mechanism (3) for blocking the internal circulation transmission of the docking assembly (1) is provided longitudinally inside the docking assembly (1), cleaning assemblies (5) for cleaning the surface attachments of the knife gate blocking mechanism (3) are provided at both ends of the docking assembly (1) on both sides of the knife gate blocking mechanism (3), a driving mechanism (4) for driving the knife gate blocking mechanism (3) and the two cleaning assemblies (5) to operate is provided at the upper end of the sealing assembly (2), and two contactless magnetic coupling transmission mechanisms (6) for sealing and transmitting kinetic energy and respectively driving the two cleaning assemblies (5) to operate are provided at the center of the outer side of the docking assembly (1) near both ends.

2. A two-way sealing two-piece knife gate valve according to claim 1, characterized in that: The docking assembly (1) comprises a sealed cavity (101), wherein the centers of two inner walls of the sealed cavity (101) facing each other are fixedly connected with guide strips (102), and the inside of the sealed cavity (101) is fixedly sleeved with material delivery pipes (103) on both sides, and the inner centers of the two material delivery pipes (103) are each provided with a mounting hole (104) at the upper part.

3. A two-way sealing two-piece knife gate valve according to claim 2, characterized in that: The ends of the two conveying pipes (103) that are away from each other are fixedly connected to a docking flange ring (105), the upper centers of the two sides of the sealing cavity (101) are fixedly connected to lower ears (106), and the lower centers of the two inner walls opposite to each other of the sealing cavity (101) are each provided with a sealing groove (107), and the first sealing ring (108) is sleeved inside the two sealing grooves (107).

4. A two-way sealing two-piece knife gate valve according to claim 2, characterized in that: The sealing assembly (2) comprises a rectangular pressure ring (201), the rectangular pressure ring (201) is arranged at the upper end of the sealing cavity (101), a sealing cover (202) is fixedly sleeved at the center of the rectangular pressure ring (201), and a sealing gasket (203) is placed between the rectangular pressure ring (201) and the sealing cavity (101), the rectangular pressure ring (201) and the sealing cavity (101) are fastened together by a plurality of bolts, a sealing tube (204) is fixedly sleeved at the upper center of the sealing cover (202), a sealing ring (205) is fixedly sleeved at the center of the sealing tube (204), a screw rod (206) is fixedly sleeved inside the sealing ring (205), and upper ear pieces (207) are fixedly connected at the center of the sides of the sealing cover (202) that are away from each other.

5. A two-way sealing two-piece knife gate valve according to claim 4, characterized in that: The knife gate blocking mechanism (3) comprises an internal thread block (301), the internal thread block (301) is threadedly sleeved on the outside of the screw rod (206), and the two sides of the internal thread block (301) away from each other are fixedly connected with connecting plates (302), the lower ends of the two connecting plates (302) are fixedly connected with docking plates (303), a middle connecting column (304) is fixedly connected at the center between the two docking plates (303), and a movable hole (305) for accommodating the screw rod (206) is longitudinally opened at the center of the middle connecting column (304), and a clamping plate (306) is fixedly connected to the middle areas of the two sides of the docking plates (303) away from each other.

6. A two-way sealing two-piece knife gate valve according to claim 5, characterized in that: The two clamps (306) on one side are clamped on the outside of the guide bar (102) on one side, and the two clamps (306) on the other side are clamped on the outside of the guide bar (102) on the other side. The four clamps (306) and the two guide bars (102) are in sliding contact and play a longitudinal sliding guiding role. The centers of the two docking plates (303) on both sides away from each other are fixedly connected with positioning discs (307). The outer sides of the two positioning discs (307) are fixedly sleeved with second sealing rings (308). The sides of the two second sealing rings (308) away from each other are in abutting contact with the sides of the two first sealing rings (108) close to each other, and the two second sealing rings (308) are in detachable contact with the two first sealing rings (108).

7. The two-way sealing two-piece knife gate valve according to claim 1, characterized in that: The driving mechanism (4) includes two transmission shafts (401) and a driving gear (402). The two transmission shafts (401) are respectively rotatably sleeved on the lower ear piece (106) and the upper ear piece (207) on one side and the lower ear piece (106) and the upper ear piece (207) on the other side through bearings. The driving gear (402) is fixedly sleeved on the upper center of the outer side of the screw rod (206). The center of the upper end of the driving gear (402) is fixedly connected to the lower limit plate (403). The upper center of the outer side of the two transmission shafts (401) is fixedly sleeved with a transmission gear (402). 04), and the two transmission gears (404) and the driving gear (402) are gear-engaged transmission, the center of the upper end of the lower limit plate (403) is fixedly connected to a threaded column (405), the upper end of the threaded column (405) is fixedly connected to an upper limit plate (406), the inner center of the driving gear (402) is annularly arranged and fixedly sleeved with a plurality of guide rods (407), and the outer longitudinal sliding sleeves of the plurality of guide rods (407) are provided with a hand wheel (408), and the inner center of the hand wheel (408) is threadedly sleeved on the outer side of the threaded column (405).

8. The two-way sealing two-piece knife gate valve according to claim 1, characterized in that: The cleaning assembly (5) comprises a support sheet (501) and a lower support frame (502), wherein the support sheet (501) is fixedly connected to the center of the lower inner wall of one of the feed pipes (103) at one end, and the lower support frame (502) is fixedly connected to the center of the upper inner wall of the feed pipe (103) at one end away from the support sheet (501), and a transmission column (503) is rotatably sleeved at the upper center of the support sheet (501) through a bearing, and the outer side of the transmission column (503) is close to the center of the transmission column (503). A plurality of scrapers (504) are fixedly connected in a circular arrangement near one end of the positioning disc (307), and the plurality of scrapers (504) and the positioning disc (307) are slidably fitted on the side close to each other. A three-section universal joint (505) is rotatably sleeved via a bearing at the lower center of the lower support frame (502), and the three-section universal joint (505) is fixedly connected to an end of the transmission column (503) away from the plurality of scrapers (504) at one end away from the lower support frame (502).

9. The two-way sealing two-piece knife gate valve according to claim 4, characterized in that: The contactless magnetic coupling transmission mechanism (6) comprises an outer isolation tube (601), an upper support frame (602) and a transmission coupling shaft (603), wherein the outer isolation tube (601) is fixedly sleeved inside one of the mounting holes (104), the upper support frame (602) is fixedly connected to the center of the upper end of the feed pipe (103) on the corresponding side, and the transmission coupling shaft (603) is fixedly connected to the upper end of the three-section universal joint (505) near one end of the lower support frame (502). The upper support frame (602) is provided with a lower sealing ring (604) fixedly sleeved at the lower center of the interior, and an inner isolation tube (605) is fixedly sleeved inside the lower sealing ring (604), the transmission coupling shaft (603) is sleeved inside the inner isolation tube (605), and the outer wall of the transmission coupling shaft (603) and the inner wall of the inner isolation tube (605) are non-contact sleeved, and an isolation cover (606) is fixedly sleeved at the upper center of the interior of the inner isolation tube (605).

10. A two-way sealing two-piece knife gate valve according to claim 9, characterized in that: A plurality of transmission permanent magnets (607) are fixedly embedded in a circular arrangement at the edge of the inner center of the transmission coupling shaft (603); a synchronous shaft (608) is rotatably sleeved at the upper center of the upper support frame (602) through a bearing, and a driving coupling sleeve (609) is fixedly connected to the lower end of the synchronous shaft (608); the driving coupling sleeve (609) is rotatably sleeved inside the outer isolation tube (601) outside the inner isolation tube (605), and the outer wall of the driving coupling sleeve (609) is connected to the outer isolation tube (601). The interior of the outer isolation tube (601) is in contactless sleeve connection, the inner wall of the drive coupling sleeve (609) and the outer wall of the isolation cover (606) are in contactless sleeve connection, a plurality of drive permanent magnets (6010) are fixedly embedded in a circular arrangement at the center of the drive coupling sleeve (609) near the edge, the plurality of drive permanent magnets (6010) are magnetically attracted to the plurality of transmission permanent magnets (607), and the upper end of the synchronization shaft (608) is fixedly connected to the lower end of the transmission shaft (401) on the corresponding side.

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