Lever-cam linkage quick shut-off valve

Abstract

The application discloses a lever cam linkage quick cut-off valve and relates to the field of lever cam linkage quick cut-off valves. The lever cam linkage quick cut-off valve solves the problems that the existing cut-off valve is slow in manual cutting and is difficult to realize the self-cleaning function of the filter screen in the valve body during switching operation. The lever cam linkage quick cut-off valve comprises a valve body, an input pipe, an output pipe and a switching mechanism. The switching mechanism comprises a switching disc, a fixed pipe, a filter screen, an opening and closing piece and a cleaning piece. A conveying cavity is formed in the switching disc. The lever cam linkage quick cut-off valve can realize the quick cutting operation of fluid by controlling the opening and closing states of the opening and closing piece through the switching mechanism. Meanwhile, the switching disc can be driven to rotate and switch during the opening of the opening and closing piece, the orientations of the filter screens on both sides can be adjusted, the filter screens on both sides can be back-flushed and self-cleaned by the fluid in the input pipe through the cleaning piece after the switching disc rotates to the set position, the positions of the filter screens can be directly switched, and the filter screen close to the output pipe can be back-flushed by the fluid in the fixed pipe.

Description

Technical Field

[0001] This invention relates to the field of lever-cam linkage quick-cut-off valve technology, specifically a lever-cam linkage quick-cut-off valve. Background Technology

[0002] A shut-off valve is a type of valve used to control the flow of fluid in pipelines. It has wide applications in both industrial and civil sectors and generally includes gate valves, ball valves, and butterfly valves. In industries such as petroleum, chemical, and power, it is used to transport various flammable, explosive, toxic, harmful, or corrosive fluids, quickly shutting off the fluid in emergencies to prevent the accident from escalating. In urban gas and water supply systems, shut-off valves can promptly cut off gas or water supplies in the event of leaks or other malfunctions, ensuring the safety of residents' lives and property.

[0003] Some existing shut-off valves do not switch quickly enough when manually controlled to close. At the same time, due to the relatively delicate internal structure of the valve, the input fluid needs to be pre-filtered during use to avoid excessive wear of the valve by particulate matter, which would affect the sealing performance. However, the filter components of existing shut-off valves are difficult to automatically backwash and clean during the switching process, resulting in a relatively short overall service life. Long-term use can easily affect the filtration efficiency and fluid delivery efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a convenient lever-cam linkage quick-cut-off valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lever-cam linkage quick-cut-off valve, comprising a valve body and a switching mechanism. An input pipe and an output pipe are fixedly connected to the valve body, with the axes of the input pipe and the output pipe aligned on the same straight line. The switching mechanism includes a switching disc rotatably connected to the inner wall of the valve body. A conveying chamber is formed within the switching disc, and fixed pipes are fixedly connected to both ends of the conveying chamber. Two sets of fixed pipes are respectively connected to one end of the input pipe and one end of the output pipe. A filter screen is fixedly connected within each fixed pipe. An opening mechanism for controlling the fluid conveying state within the fixed pipes is provided within the conveying chamber. The valve body is equipped with a cleaning component for controlling the fluid in the input pipe to backwash and self-clean the filter screens on both sides after the switching disc rotates to a set position. The switching mechanism achieves rapid fluid cutoff by controlling the opening and closing state of the opening and closing component. At the same time, it can drive the switching disc to rotate and switch during the opening and closing process, adjust the orientation of the filter screens on both sides, and perform self-cleaning through the cleaning component. When it is not necessary to output impurities separately, the position of the filter screen can be directly switched, and the filter screen near the output pipe side can be automatically backwashed by the fluid in the fixed pipe, which is convenient.

[0006] Preferably, the cleaning component includes two sets of cleaning pipes fixedly installed on the valve body. The two sets of cleaning pipes can be connected to the two sets of fixed pipes simultaneously. A flushing pipe is connected to the input pipe. A rotating cylinder is rotatably connected inside the conveying chamber. The bottom end of the rotating cylinder is rotatably connected to the top end of the flushing pipe. The rotating cylinder is connected to the flushing pipe. A first side hole is provided on the side of the rotating cylinder. A control component is provided inside the rotating cylinder to control the opening and closing state of the first side hole, so as to control the fluid in the input pipe to backwash and self-clean the filter screens on both sides after the switching disc rotates to the set position.

[0007] Preferably, the control component includes a lifting plate that is slidably connected to the inner wall of the rotating cylinder in a vertical direction. A lifting tube that slides against the inner wall of the rotating cylinder is fixedly connected to the bottom surface of the lifting plate. A second side hole that communicates with the first side hole is opened on the side of the lifting tube. A first spring that is fixedly connected to the rotating cylinder is fixedly connected to the bottom surface of the lifting plate. A drive tube that is rotatably connected to the switching plate is coaxially fixedly connected to the rotating cylinder. The drive tube passes through the valve body and is rotatably connected to the valve body. A lifting component for controlling the lifting state of the lifting plate is provided inside the drive tube, which facilitates the control of the opening and closing state of the first side hole.

[0008] Preferably, the opening and closing component includes a limiting tube fixedly installed inside the fixed tube, a sealing gasket fixedly connected to the end of the limiting tube away from the rotating cylinder, a fixing ring fixedly connected inside the fixed tube, a filter screen fixedly installed on the fixing ring, a second spring fixedly connected to the fixing ring, a conical block fixedly connected to the end of the second spring away from the fixing ring, one side of the conical surface of the conical block being able to abut and seal against the sealing gasket, and a driving rod fixedly connected to the end of the conical block near the rotating cylinder, the driving rod being slidably connected to the inner wall of the fixed tube in the horizontal direction through a fixing frame, facilitating control of the fluid transport state inside the fixed tube.

[0009] Preferably, the switching mechanism includes two sets of protrusions fixedly installed on the outer wall of the rotating cylinder. The two sets of protrusions are symmetrically distributed on the outer wall of the rotating cylinder. The upper end of the drive tube is coaxially fixedly connected to a drive disk. The switching disk is provided with a limiting member for limiting the rotation angle of the switching disk, so as to facilitate the rotation and switching of the switching disk.

[0010] Preferably, the limiting component includes a limiting block fixedly installed inside the valve body, an arc-shaped groove is formed on the upper side of the switching disk, the limiting block is slidably connected to the inner wall of the arc-shaped groove, a triangular groove is formed on the limiting block, three sets of sliding grooves are formed on the switching disk, the spacing between adjacent sliding grooves is the same, a plug-in block is slidably connected in the sliding groove, a third spring is fixedly connected to the plug-in block and fixedly connected to the sliding groove, and the tip of the plug-in block can be inserted into the triangular groove to facilitate limiting the rotation angle of the switching disk.

[0011] Preferably, the lifting component includes a lifting rod fixedly installed on the upper side of the lifting plate. The lifting rod is slidably connected to the inner wall of the drive tube in the vertical direction. A device groove is opened in the drive plate, and a rotating shaft is fixedly connected in the device groove. A lever is rotatably connected to the rotating shaft. The bottom surface of one end of the lever is in contact with the top surface of the lifting rod. The rotating shaft is located on the side of the lever closer to the lifting rod, which facilitates control of the lifting state of the lifting plate.

[0012] Preferably, the protruding part of the protrusion has a groove that can initially engage with one end of the drive rod, which facilitates initial positioning when the protrusion and the drive rod come into contact, thus preventing the valve body from closing during liquid delivery.

[0013] Preferably, a pointer is fixedly connected to the drive disk, with the tip of the pointer pointing towards the protruding position of the bump. Multiple sets of control blocks are uniformly fixedly connected to the outer wall of the drive disk to facilitate auxiliary judgment of the position of the bump.

[0014] Preferably, the upper side of the valve body is provided with an observation groove for observing the position and angle of the arc-shaped groove and the switching disk, which facilitates the observation of the position and angle of the arc-shaped groove and the switching disk.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention provides a lever-cam linkage quick-cut-off valve, which solves the problems of slow manual cutting speed and difficulty in achieving self-cleaning of the filter screen in the valve body during the switching operation of existing shut-off valves. The valve achieves rapid fluid cut-off by controlling the opening and closing state of the opening and closing parts through a switching mechanism. At the same time, it can drive the switching disc to rotate and switch during the opening and closing process, adjusting the orientation of the filter screens on both sides. After the switching disc rotates to the set position, the fluid in the input pipe is controlled by the cleaning component to backwash and self-clean the filter screens on both sides. When it is not necessary to output impurities separately, the position of the filter screen can be directly switched, and the filter screen on the side closer to the output pipe can be backwashed automatically by the fluid in the fixed pipe. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the bottom structure of the valve body of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the valve body of the present invention;

[0020] Figure 4 This is a partial structural diagram of the lifting component of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of region A in the middle;

[0022] Figure 6 This is a partial structural diagram of the opening and closing component of the present invention;

[0023] Figure 7 This is a partial structural cross-sectional view of the opening and closing component of the present invention;

[0024] Figure 8 for Figure 7 Enlarged view of region B in the middle;

[0025] Figure 9 This is a partial structural diagram of the switching mechanism of the present invention;

[0026] Figure 10 for Figure 9 Enlarged view of region C;

[0027] Figure 11 This is a partial structural cross-sectional view of the cleaning component of the present invention.

[0028] In the diagram: 1-Valve body; 2-Input pipe; 3-Output pipe; 4-Switching disc; 5-Conveying chamber; 6-Fixing pipe; 7-Filter screen; 8-Cleaning pipe; 9-Flushing pipe; 10-Rotating cylinder; 11-First side hole; 12-Lifting disc; 13-Lifting pipe; 14-Second side hole; 15-First spring; 16-Drive pipe; 18-Limiting pipe; 19-Sealing gasket; 20-Fixing ring; 21-Second spring; 22-Conical block; 23-Drive rod; 24-Protrusion; 25-Drive disc; 26-Limiting block; 27-Arc groove; 28-Triangular groove; 29-Sliding groove; 30-Plug-in block; 31-Third spring; 32-Lifting rod; 33-Device groove; 34-Rotating shaft; 35-Lever; 36-Groove; 37-Pointer; 38-Control block; 39-Observation groove. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-11 This invention provides a technical solution: a lever-cam linkage quick-cut-off valve, including a valve body 1 and a switching mechanism. An input pipe 2 and an output pipe 3 are fixedly connected to the valve body 1, with their axes aligned on the same straight line. The switching mechanism includes a switching disc 4 rotatably connected to the inner wall of the valve body 1. A conveying chamber 5 is formed within the switching disc 4. Fixed pipes 6 are fixedly connected to both ends of the conveying chamber 5, and the two sets of fixed pipes 6 can respectively communicate with one end of the input pipe 2 and the output pipe 3. A filter screen 7 is fixedly connected within the fixed pipe 6. The conveying chamber 5 is equipped with a device for controlling the fluid conveying state within the fixed pipes 6. The valve body 1 is equipped with a cleaning component that controls the fluid in the input pipe 2 to backwash and self-clean the filter screens 7 on both sides after the switching disc 4 is rotated to the set position. The switching mechanism realizes the rapid cut-off of fluid by controlling the opening and closing state of the opening and closing component. At the same time, it can drive the switching disc 4 to rotate and switch during the opening and closing process, adjust the orientation of the filter screens 7 on both sides, and perform self-cleaning through the cleaning component. When it is not necessary to output impurities separately, the position of the filter screen 7 can be directly switched, and the filter screen 7 on the side closer to the output pipe 3 can be backwashed automatically by the fluid in the fixed pipe 6.

[0031] The cleaning component includes two sets of cleaning pipes 8 fixedly installed on the valve body 1. The two sets of cleaning pipes 8 can be connected to two sets of fixed pipes 6 at the same time. A flushing pipe 9 is connected to the input pipe 2. A rotating cylinder 10 is rotatably connected in the delivery chamber 5. The bottom end of the rotating cylinder 10 is rotatably connected to the top end of the flushing pipe 9. The rotating cylinder 10 is connected to the flushing pipe 9. A first side hole 11 is opened on the side of the rotating cylinder 10. A control component for controlling the opening and closing state of the first side hole 11 is provided inside the rotating cylinder 10.

[0032] The control components include a lifting plate 12 that is slidably connected to the inner wall of the rotating cylinder 10 in a vertical direction. A lifting tube 13 that is slidably attached to the inner wall of the rotating cylinder 10 is fixedly connected to the bottom surface of the lifting plate 12. A second side hole 14 that can communicate with the first side hole 11 is opened on the side of the lifting tube 13. A first spring 15 that is fixedly connected to the rotating cylinder 10 is fixedly connected to the bottom surface of the lifting plate 12. A drive tube 16 that is rotatably connected to the switching plate 4 is coaxially fixedly connected to the rotating cylinder 10. The drive tube 16 passes through the valve body 1 and is rotatably connected to the valve body 1. A lifting component for controlling the lifting state of the lifting plate 12 is provided inside the drive tube 16.

[0033] The opening and closing mechanism includes a limiting tube 18 fixedly installed inside the fixed tube 6. A sealing gasket 19 is fixedly connected to the end of the limiting tube 18 away from the rotating cylinder 10. A fixing ring 20 is fixedly connected inside the fixed tube 6. A filter screen 7 is fixedly installed on the fixing ring 20. A second spring 21 is fixedly connected to the fixing ring 20. A conical block 22 is fixedly connected to the end of the second spring 21 away from the fixing ring 20. One side of the conical surface of the conical block 22 can abut against the sealing gasket 19 for sealing. A drive rod 23 is fixedly connected to the end of the conical block 22 near the rotating cylinder 10. The drive rod 23 is slidably connected to the inner wall of the fixed tube 6 in the horizontal direction through a fixing frame.

[0034] The switching mechanism includes two sets of protrusions 24 fixedly installed on the outer wall of the rotating cylinder 10. The two sets of protrusions 24 are symmetrically distributed on the outer wall of the rotating cylinder 10. The upper end of the drive tube 16 is coaxially fixedly connected to the drive disk 25. The protruding position of the protrusion 24 is provided with a groove 36 that can initially engage with one end of the drive rod 23. A pointer 37 is fixedly connected to the drive disk 25. The tip of the pointer 37 faces the protruding position of the protrusion 24. Multiple sets of control blocks 38 are uniformly fixedly connected to the outer wall of the drive disk 25. The switching disk 4 is provided with a limiting member for limiting the rotation angle of the switching disk 4.

[0035] The limiting component includes a limiting block 26 fixedly installed inside the valve body 1, an arc-shaped groove 27 on the upper side of the switching disk 4, the limiting block 26 being slidably connected to the inner wall of the arc-shaped groove 27, a triangular groove 28 on the limiting block 26, and three sets of sliding grooves 29 on the switching disk 4, with the same spacing between adjacent sliding grooves 29. A plug-in block 30 is slidably connected inside the sliding groove 29, and a third spring 31 fixedly connected to the sliding groove 29 is fixedly connected to the plug-in block 30. The tip of the plug-in block 30 can be plugged into the triangular groove 28. An observation groove 39 is provided on the upper side of the valve body 1 for observing the position and angle of the arc-shaped groove 27 and the switching disk 4.

[0036] The lifting component includes a lifting rod 32 fixedly installed on the upper side of the lifting plate 12. The lifting rod 32 is slidably connected to the inner wall of the drive tube 16 in the vertical direction. A device groove 33 is opened in the drive plate 25. A rotating shaft 34 is fixedly connected in the device groove 33. A lever 35 is rotatably connected to the rotating shaft 34. The bottom surface of one end of the lever 35 is in contact with the top surface of the lifting rod 32. The rotating shaft 34 is located on the side of the lever 35 closer to the lifting rod 32.

[0037] Please refer to the appendix for this implementation plan. Figure 7At this time, the valve is closed. The fluid input from the input pipe 2 will be filtered by the filter screen 7 on this side and pushed by the side of the cone block 22. At the same time, the cone block 22 is pushed by the second spring 21 and fits tightly with the sealing gasket 19, making it difficult for the fluid to enter the limiting pipe 18 through the gap between the cone block 22 and the sealing gasket 19 and flow into the delivery chamber 5. At this time, the first spring 15 lifts the lifting plate 12 and the lifting pipe 13. The first side hole 11 and the second side hole 14 are not connected. The fluid flowing into the rotating cylinder 10 through the flushing pipe 9 continues to lift the lifting plate 12 upward, thereby preventing the first side hole 11 and the second side hole 14 from connecting. The fluid in the rotating cylinder 10 cannot enter the delivery chamber 5. At this time, the valve body 1 is in a closed state, and no fluid will flow through the delivery chamber 5 to the output pipe 3.

[0038] The regulations are attached Figure 9 In the top view, the lifting rod 32 rotates clockwise for forward rotation and counterclockwise for reverse rotation. When the valve needs to be opened, the drive disc 25 rotates in the reverse direction, causing the drive tube 16 to drive the rotating cylinder 10 to rotate in the opposite direction. The protrusion 24 reaches the position where it abuts against one end of the drive rod 23. At this time, due to the limiting block 26 limiting the arc groove 27, the switching disc 4 cannot rotate in the same direction as the protrusion 24. The protrusion 24 continues to rotate, pushing the drive rods 23 on both sides until the drive rod 23 is initially limited to engage with the groove 36, thus completing the valve opening. During operation, the drive rods 23 on both sides push the conical block 22 to slide towards the input pipe 2 and the output pipe 3 respectively, opening the gap between the conical block 22 and the sealing gasket 19. The fluid passes through the input pipe 2, is filtered by the filter screen 7, and then flows into the conveying chamber 5. It then flows to the filter screen 7 on the other side and reaches the output pipe 3. At this time, the filter screen 7 on the side closer to the input pipe 2 can block a large number of impurities on the side closer to the input pipe 2, reducing the probability of the limiting pipe 18 and the structure inside the conveying chamber 5 being eroded by particles, extending the service life of the equipment and the sealing performance of the valve.

[0039] When the valve needs to be closed, continue to rotate the drive disc 25 in the reverse direction. The switching disc 4 cannot rotate in the reverse direction, which allows the protrusion 24 to rotate, disengaging the drive rod 23 from the groove 36. At this point, only a small rotation of the drive disc 25 is needed to allow the drive rod 23 to slide out of the groove 36. Under the push of the first springs 15 at both ends, the drive rod 23 is directly pushed towards the rotating cylinder 10. The valve is then closed again by the contact between the conical block 22 and the sealing gasket 19. The entire structure then returns to its original position. Figure 9 The structure is positioned in the middle, and the cutting process is fast and efficient with a very small rotation angle, making it easy to operate.

[0040] When the filter 7 near the input pipe 2 needs to be rinsed, the forward rotation of the drive disc 25 will drive the drive pipe 16 and the lifting rod 32 to rotate, thereby causing the rotating cylinder 10 to drive the protrusion 24 to rotate. At this time, since the limiting block 26 is located at the end of the arc groove 27 near the output pipe 3, the switching disc 4 can rotate forward with the protrusion 24. The drive rod 23 near the input pipe 2 is pushed by the second spring 21 and the fluid pressure, and is difficult to be directly pushed by the protrusion 24. The insertion block 30 is subjected to a small elastic force from the third spring 31 and is only used to initially limit the triangular groove 28. At this time, the protrusion 24 will directly push the drive rod 23 to drive the entire switching disc 4 to rotate forward. When it rotates 90°, the insertion block 30 located in the middle will initially engage with the triangular groove 28. At this time, the fixing pipes 6 on both sides are exactly engaged with the cleaning pipes on both sides. The washing pipe 8 is connected. Lift one end of the lever 35 and press down the lifting rod 32 with less effort through the other end of the lever 35. The lifting rod 32 drives the lifting plate 12 and the lifting pipe 13 to move down, so that the first side hole 11 and the second side hole 14 are connected. The liquid in the rotating cylinder 10 can be sprayed out from the first side hole 11 into the conveying chamber 5. At this time, the fixed pipes 6 at both ends of the conveying chamber 5 are only connected to the two washing pipes 8. The liquid flows back into the washing pipe 8 through the filter screen 7 in the fixed pipe 6, realizing the reverse flushing function of the filter screen 7. The washing pipe 8 can be connected to the waste collection pipe to output the liquid and impurities in the flushing process together. In the backwashing process, the fluid in the input pipe 2 is also used for flushing, avoiding the change of liquid composition in the conveying chamber 5, so that the conveying chamber 5 always maintains a single raw material for conveying during subsequent use.

[0041] When it is not necessary to separately discharge the impurities on the filter screen 7, that is, when the liquid output from the output pipe 3 does not need to be filtered and can contain a certain amount of impurities, there is no need to stop the rotation operation at the above-mentioned 90° rotation. Continue to rotate directly until the switching disk 4 rotates 180° to complete the switching of the positions of the two fixed pipes 6, and switch the filter screen 7 that was originally facing the input pipe 2 to the output pipe 3 side. At this time, continue to rotate the drive disk 25. The switching disk 4 is limited by the limit block 26 and cannot continue to rotate. The protrusion 24 gradually pushes up the drive rod 23, opening the connection state of the two fixed pipes 6. The originally cleaner filter screen 7 can be used to filter the impurities on the input pipe 2 side, preventing impurities from entering the conveying chamber 5. The liquid output from the conveying chamber 5 to the output pipe 3 can backwash the originally more contaminated filter screen 7. After the liquid passes through the filter screen 7, it carries away the impurities and is output from the output pipe 3. This switching can effectively extend the service life of the internal structure of the valve body 1, and the operation is relatively convenient and efficient.

[0042] It is worth noting that when self-cleaning of filter 7 is not required, continuous unidirectional rotation of drive disc 25 opens and closes the valve once every 360° rotation. When switching the direction of filter 7, drive disc 25 is rotated in the opposite direction, again opening and closing the valve once every 360° rotation. Each reversal of drive disc 25's direction achieves a switch in the orientation of filter 7. This structure employs a lever 35 and cam linkage control method, achieving both labor-saving operation and rapid control. (See attached diagram.) Figure 7 The flushing pipe 9 shown is equipped with a corresponding filter structure, which can filter the fluid during the backwashing process and prevent impurities from entering the conveying chamber 5. Since the backwashing duration is short, the filter structure in the flushing pipe 9 has a short service life. When backwashing is not required, the filter structure does not need to be used, so the replacement cycle is long and does not affect the normal use of the equipment.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lever-cam linked quick-cut-off valve, characterized in that, include: A valve body (1) is fixedly connected to an input pipe (2) and an output pipe (3), the axes of the input pipe (2) and the output pipe (3) are on the same straight line; Also includes: The switching mechanism includes a switching disc (4) rotatably connected to the inner wall of the valve body (1). A conveying chamber (5) is provided inside the switching disc (4). Fixed pipes (6) are fixedly connected to both ends of the conveying chamber (5). The two sets of fixed pipes (6) are respectively connected to one end of the input pipe (2) and the output pipe (3). A filter screen (7) is fixedly connected inside the fixed pipe (6). An opening and closing element for controlling the fluid conveying state inside the fixed pipe (6) is provided inside the conveying chamber (5). The valve body (1) is provided with a control element for controlling the fluid conveying state after the switching disc (4) rotates to a set position. The cleaning component is a self-cleaning component that controls the fluid in the input pipe (2) to backwash the filter screens (7) on both sides. The switching mechanism realizes the rapid cut-off operation of the fluid by controlling the opening and closing state of the opening and closing component. At the same time, it can drive the switching disk (4) to rotate and switch during the opening and closing process, adjust the orientation of the filter screens (7) on both sides, and can perform self-cleaning through the cleaning component. When there is no need to output impurities separately, the position of the filter screen (7) can be directly switched, and the filter screen (7) on the side close to the output pipe (3) can be backwashed automatically by the fluid in the fixed pipe (6). The cleaning component includes two sets of cleaning pipes (8) fixedly installed on the valve body (1). The two sets of cleaning pipes (8) can be connected to the two sets of fixed pipes (6) at the same time. A flushing pipe (9) is connected to the input pipe (2). A rotating cylinder (10) is rotatably connected in the delivery chamber (5). The bottom end of the rotating cylinder (10) is rotatably connected to the top end of the flushing pipe (9). The rotating cylinder (10) is connected to the flushing pipe (9). A first side hole (11) is opened on the side of the rotating cylinder (10). A control component for controlling the opening and closing state of the first side hole (11) is provided in the rotating cylinder (10). The control component includes a lifting plate (12) that is slidably connected to the inner wall of the rotating cylinder (10) in a vertical direction. The bottom surface of the lifting plate (12) is fixedly connected to a lifting tube (13) that is slidably attached to the inner wall of the rotating cylinder (10). The side of the lifting tube (13) is provided with a second side hole (14) that can communicate with the first side hole (11). The bottom surface of the lifting plate (12) is fixedly connected to a first spring (15) that is fixedly connected to the rotating cylinder (10). The rotating cylinder (10) is coaxially fixedly connected to a drive tube (16) that is rotatably connected to the switching plate (4). The drive tube (16) passes through the valve body (1) and is rotatably connected to the valve body (1). The drive tube (16) is provided with a lifting component for controlling the lifting state of the lifting plate (12). The switching mechanism includes two sets of protrusions (24) fixedly installed on the outer wall of the rotating cylinder (10). The two sets of protrusions (24) are symmetrically distributed on the outer wall of the rotating cylinder (10). The upper end of the drive tube (16) is coaxially fixedly connected to a drive disk (25). The switching disk (4) is provided with a limiting member for limiting the rotation angle of the switching disk (4).

2. The lever-cam linkage quick-cut-off valve according to claim 1, characterized in that: The opening and closing component includes a limiting tube (18) fixedly installed inside the fixed tube (6). A sealing gasket (19) is fixedly connected to one end of the limiting tube (18) away from the rotating cylinder (10). A fixing ring (20) is fixedly connected inside the fixed tube (6). The filter screen (7) is fixedly installed on the fixing ring (20). A second spring (21) is fixedly connected to the fixing ring (20). A conical block (22) is fixedly connected to one end of the second spring (21) away from the fixing ring (20). One side of the conical surface of the conical block (22) can abut against the sealing gasket (19) for sealing. A drive rod (23) is fixedly connected to one end of the conical block (22) near the rotating cylinder (10). The drive rod (23) is slidably connected to the inner wall of the fixed tube (6) in the horizontal direction through a fixing frame.

3. The lever-cam linkage quick-cut-off valve according to claim 1, characterized in that: The limiting component includes a limiting block (26) fixedly installed inside the valve body (1). An arc groove (27) is provided on the upper side of the switching disk (4). The limiting block (26) is slidably connected to the inner wall of the arc groove (27). A triangular groove (28) is provided on the limiting block (26). Three sets of sliding grooves (29) are provided on the switching disk (4). The spacing between adjacent sliding grooves (29) is the same. A plug-in block (30) is slidably connected in the sliding groove (29). A third spring (31) is fixedly connected to the plug-in block (30) and fixedly connected to the sliding groove (29). The tip of the plug-in block (30) can be inserted into the triangular groove (28).

4. The lever-cam linkage quick-cut-off valve according to claim 1, characterized in that: The lifting component includes a lifting rod (32) fixedly installed on the upper side of the lifting plate (12). The lifting rod (32) is slidably connected to the inner wall of the drive tube (16) in the vertical direction. A device groove (33) is opened in the drive plate (25). A rotating shaft (34) is fixedly connected in the device groove (33). A lever (35) is rotatably connected on the rotating shaft (34). The bottom surface of one end of the lever (35) is in contact with the top surface of the lifting rod (32). The rotating shaft (34) is located on the side of the lever (35) close to the lifting rod (32).

5. The lever-cam linkage quick-cut-off valve according to claim 2, characterized in that: The protruding part of the protrusion (24) has a groove (36) that can initially engage with one end of the drive rod (23).

6. The lever-cam linkage quick-cut-off valve according to claim 1, characterized in that: A pointer (37) is fixedly connected to the drive disk (25), with the tip of the pointer (37) pointing towards the protruding position of the bump (24). Multiple sets of control blocks (38) are uniformly fixedly connected to the outer wall of the drive disk (25).

7. The lever-cam linkage quick-cut-off valve according to claim 3, characterized in that: The valve body (1) has an observation groove (39) on its upper side for observing the position and angle of the arc groove (27) and the switching disk (4).

Images