Plug valve easy to maintain

Abstract

The invention discloses a plug valve easy to maintain, and belongs to the field of plug valves, the plug valve easy to maintain comprises a valve body and a valve core, the valve core is arranged in the valve body, and the valve core can rotate in the valve body; the liquid inlet pipe is mounted at the left end of the valve body; the liquid outlet pipe is installed at the right end of the valve body, and the interior of the liquid outlet pipe communicates with the interior of the liquid inlet pipe; the circulation opening is formed in the center position of the valve element in a penetrating mode; the upper cover plate is mounted at the upper end of the valve body; and the rotating rod is connected to the upper end of the valve element, the rotating rod is used for controlling the valve element to rotate in the valve body, and the upper end of the rotating rod penetrates through the upper cover plate and extends to the outside. According to the plug valve, the circulation opening of the valve element can be automatically cleaned in the daily use process of the plug valve, the clean circulation opening can ensure smooth flowing of a medium in the plug valve, flowing resistance caused by blockage or caliber reduction is reduced, and the flowing efficiency of the medium is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plug valves, and more particularly to a plug valve that is easy to maintain. Background Art

[0002] As a common fluid control device, plug valve plays an important role in many fields such as industrial production, pipeline transportation and daily life. Its working principle is to change the opening and closing state of the fluid channel by rotating the valve core, thereby realizing the circulation or cutoff of the fluid. However, in actual use, the stability and reliability of the plug valve are often affected by many factors, among which the sticking of impurities in the medium to the valve core channel is a problem that cannot be ignored.

[0003] During the use of the plug valve, the medium (such as gas, liquid or suspension containing solid particles) flows through the channel opening of its valve core. These media often contain various impurities, such as dust, sand, rust, oil stains, etc. During the flow of the fluid, these impurities will gradually stick to the channel opening of the valve core due to changes in flow velocity, the formation of vortexes and the friction between the fluid and the surface of the valve core.

[0004] As time goes by, there will be more and more sticky impurities at the channel opening. These impurities will not only reduce the effective flow area of ​​the channel opening, but also change the flow characteristics of the fluid when passing through. Specifically, the accumulation of impurities will cause the channel opening to narrow, increase the resistance of the fluid passing through, and reduce the flow rate. In extreme cases, the channel opening may even be completely blocked, making it impossible for the medium to flow in the plug valve. The blockage of the plug valve channel opening will bring a series of serious consequences. First, it will affect the normal operation of the plug valve, making it impossible for the valve to accurately control the flow or cutoff of the fluid. This may lead to problems such as fluid leakage, pressure fluctuations or unstable flow during the production process, which in turn affects the quality and production efficiency of the product. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an easy-to-maintain plug valve, which can realize automatic cleaning of the flow port of the valve core during daily use of the plug valve. The clean flow port can ensure the smooth flow of the medium in the plug valve, reduce the flow resistance caused by blockage or smaller diameter, and improve the flow efficiency of the medium.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A plug valve that is easy to maintain, comprising a valve body and a valve core, wherein the valve core is arranged in the valve body and the valve core can rotate inside the valve body; A liquid inlet pipe, which is installed at the left end of the valve body; A liquid outlet pipe, the liquid outlet pipe is installed at the right end of the valve body, and the interior of the liquid outlet pipe is communicated with the interior of the liquid inlet pipe; A flow port, the flow port being opened through the center of the valve core; An upper cover plate, the upper cover plate being mounted on the upper end of the valve body; A rotating rod, the rotating rod is connected to the upper end of the valve core, the rotating rod is used to control the valve core to rotate in the valve body, and the upper end of the rotating rod passes through the upper cover plate and extends to the outside; An electric actuator, wherein the electric actuator is mounted on the upper end of the rotating rod; A rotating cylinder, wherein the rotating cylinder is sleeved in the flow port, and the outer circumferential surface of the rotating cylinder is rotatably connected to the inner wall of the flow port; A scraper bar, the scraper bar being arranged on the inner wall of the rotating drum; A driving assembly is installed in the valve body, and is used to drive the rotating cylinder to rotate. The driving assembly includes a driving gear and a ratchet gear. The driving gear is installed in the valve core, and the driving gear is meshed and connected with the outer cylindrical surface of the rotating cylinder. When the rotating rod controls the valve core to rotate, it drives the ratchet gear to rotate, and the rotation of the ratchet gear controls the driving gear to rotate.

[0008] Furthermore, the driving assembly further comprises a sink groove, the sink groove is provided at the center position of the bottom wall of the valve body, and the ratchet gear is arranged in the sink groove; A brake block, wherein the brake block is clamped between two groups of ratchet teeth on the ratchet gear; a first spring, one end of which is fixedly connected to the brake block, and one end of which is away from the brake block is fixedly connected to the valve body; A first bevel gear, wherein the first bevel gear is mounted at the center of the upper end of the ratchet gear, the first bevel gear is disposed in the valve core, and the upper end of the valve core is fixedly connected to the rotating rod; The second bevel gear is meshed with the first bevel gear, and the left end of the second bevel gear is fixedly connected with the driving gear.

[0009] Furthermore, the driving component also includes: Grooves, the grooves are arranged in groups, the groups of grooves are opened on the side surface of the rotating rod from top to bottom, and the lower end of the rotating rod is inserted into the valve core; A stop block, wherein the stop block is arranged inside the groove and is rotatably connected to the inner wall of the groove via a rotating shaft; A second spring, wherein the second spring is fixedly mounted on the lower end of the stop block, and the lower end of the second spring is fixedly connected to the inner wall of the groove; A connecting column, one end of which is fixedly connected to the ratchet gear, and one end of which is away from the ratchet gear is fixedly connected to the driving gear, and the ratchet gear is arranged on one side of the stop block.

[0010] Furthermore, it comprises a sleeve rod, the sleeve rod is sleeved on the outside of the rotating rod, and the output shaft of the electric actuator is fixedly connected to the upper end of the sleeve rod; A permanent magnetic disk, the permanent magnetic disk being fixedly mounted on a side surface of the rotating rod; The electromagnet is arranged at the upper end of the permanent magnet disk and is mounted on the electric actuator.

[0011] Further, it comprises a fixing block, wherein the fixing block is fixedly mounted on the side surface of the rotating rod; A third spring, wherein the upper end of the third spring is fixedly connected to the fixing block, and the lower end of the third spring is fixedly connected to the valve core.

[0012] Furthermore, it comprises connecting blocks, which are in two groups, and the two groups of connecting blocks are respectively fixedly connected to the two ends of the scraper strip, and the connecting blocks are made of elastic material; The corrugated strip is fixedly connected to the upper end of the scraper strip.

[0013] Furthermore, it comprises a limit frame, which is designed as a rectangular frame structure, the connecting block is arranged in the limit frame, and the lower end of the limit frame is fixedly connected to the inner wall of the flow port.

[0014] Further, it comprises a prismatic hole, wherein the prismatic hole is opened at the center of the ratchet gear; The prism is fixedly mounted on the lower end of the first bevel gear, the prism is used to be inserted into the prism hole, and the upper cover plate is fixed to the valve body by bolts.

[0015] Further, it comprises an annular chute, which is opened on the inner wall of the flow port; An annular slider is rotatably arranged in an annular slide groove, and an inner circular surface of the annular slider is fixedly connected to an outer circular surface of the rotating cylinder.

[0016] Furthermore, it comprises a rotating disk, which is sleeved on the outside of the rotating rod and is rotatably connected to the upper cover plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This solution can automatically clean the flow port of the valve core during the daily use of the plug valve. The clean flow port can ensure the smooth flow of the medium in the plug valve, reduce the flow resistance caused by blockage or reduced diameter, and improve the flow efficiency of the medium. Since the plug valve has an automatic cleaning function, the frequency and difficulty of manual cleaning are reduced, which makes maintenance work easier and faster, reduces the skill requirements for maintenance personnel, and reduces the possible failures caused by improper maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is an appearance view of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the rotating rod of the present invention; Figure 3 This is a display diagram of the upper opening of the valve body of the present invention; Figure 4 It is a structural schematic diagram of the valve core of the present invention; Figure 5 For the present invention Figure 4 Magnified view at A in the middle; Figure 6 This is a schematic diagram of the structure of the driving assembly in the first embodiment of the present invention; Figure 7 This is a display diagram of the annular chute of the present invention; Figure 8 A bottom view of the valve core of the present invention; Fig. 9 It is a structural schematic diagram of the sink of the present invention; Fig.10 It is a schematic diagram of the structure of the brake block and the ratchet gear of the present invention; Fig.11 This is a schematic diagram of the structure of the driving component in the second embodiment of the present invention; Fig.12 For the present invention Fig.11 Magnified view at B in the middle; Fig.13 It is a schematic diagram of the structure of the stop block and the ratchet gear in the second embodiment of the present invention; Fig.14 It is a structural schematic diagram of the second spring of the present invention; Fig.15 It is a cross-sectional view of the upper half of the valve core in the second embodiment of the present invention.

[0020] Description of the numbers in the figure: 1. Valve body; 2. Liquid inlet pipe; 3. Liquid outlet pipe; 4. Valve core; 5. Flow port; 6. Rotating rod; 7. Electric actuator; 8. Rotating cylinder; 9. Scraper strip; 10. Wave strip; 11. Limit frame; 12. Connecting block; 13. First bevel gear; 14. Second bevel gear; 15. Driving gear; 16. Prism; 17. Upper cover plate; 18. Sleeve rod; 19. Groove; 20. Ratchet gear; 21. Prism hole; 22. Brake block; 23. First spring; 24. Annular slider; 25. Connecting column; 26. Rotating disk; 27. Groove; 28. Stop block; 29. ​​Second spring; 30. Fixed block; 31. Third spring; 32. Annular slide; 33. Permanent magnetic disk; 34. Electromagnet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention. Example 1

[0022] See also Figures 1 to 15 , a plug valve which is easy to maintain, comprises a valve body 1 and a valve core 4, the valve core 4 is arranged in the valve body 1, and the valve core 4 can rotate inside the valve body 1; a liquid inlet pipe 2, the liquid inlet pipe 2 is installed at the left end of the valve body 1; a liquid outlet pipe 3, the liquid outlet pipe 3 is installed at the right end of the valve body 1, and the interior of the liquid outlet pipe 3 is communicated with the interior of the liquid inlet pipe 2; a flow port 5, the flow port 5 is opened through the center position of the valve core 4; an upper cover plate 17, the upper cover plate 17 is installed at the upper end of the valve body 1; a rotating rod 6, the rotating rod 6 is connected to the upper end of the valve core 4, the rotating rod 6 is used to control the valve core 4 to rotate in the valve body 1, and the upper end of the rotating rod 6 passes through the upper cover plate 17 and extends to the outside; an electric Actuator 7, the electric actuator 7 is installed at the upper end of the rotating rod 6; a rotating cylinder 8, the rotating cylinder 8 is sleeved in the flow port 5, and the outer cylindrical surface of the rotating cylinder 8 is rotatably connected to the inner wall of the flow port 5; a scraper bar 9, the scraper bar 9 is arranged on the inner wall of the rotating cylinder 8; a driving assembly, the driving assembly is installed in the valve body 1, the driving assembly is used to drive the rotating cylinder 8 to rotate, the driving assembly includes a driving gear 15 and a ratchet gear 20, the driving gear 15 is installed in the valve core 4, the driving gear 15 is meshed with the outer cylindrical surface of the rotating cylinder 8, the rotating rod 6 controls the valve core 4 to rotate, and the ratchet gear 20 is driven to rotate, and the driving gear 15 is controlled to rotate by the rotation of the ratchet gear 20; The driving assembly also includes a sink groove 19, which is opened at the center position of the bottom wall of the valve body 1, and the ratchet gear 20 is arranged in the sink groove 19; a brake block 22, which is clamped between two groups of ratchet teeth on the ratchet gear 20; a first spring 23, one end of the first spring 23 is fixedly connected to the brake block 22, and the end of the first spring 23 away from the brake block 22 is fixedly connected to the valve body 1; a first bevel gear 13, which is installed at the center position of the upper end of the ratchet gear 20, the first bevel gear 13 is arranged in the valve core 4, and the upper end of the valve core 4 is fixedly connected to the rotating rod 6; a second bevel gear 14, which is meshed and connected with the first bevel gear 13, and the left end of the second bevel gear 14 is fixedly connected to the driving gear 15; A prism hole 21 , which is opened at the center of the ratchet gear 20 ; a prism 16 , which is fixedly mounted at the lower end of the first bevel gear 13 , and which is used to be inserted into the prism hole 21 .

[0023] By adopting the above technical scheme, when using the stopcock of the present invention, firstly, the liquid inlet pipe 2 and the liquid outlet pipe 3 are installed on the pipeline for conveying the medium. When the stopcock needs to be opened, the electric actuator 7 is started, and the electric actuator 7 drives the rotating rod 6 to rotate. When the rotating rod 6 rotates, it drives the valve core 4 to rotate. When the two ends of the flow port 5 correspond to the liquid inlet pipe 2 and the liquid outlet pipe 3, the stopcock is fully opened. When the stopcock needs to be closed, it is only necessary to control the rotating rod 6 to rotate in the opposite direction through the electric actuator 7 so that the two ends of the flow port 5 no longer correspond to the liquid inlet pipe 2 and the liquid outlet pipe 3, thereby realizing the closure of the stopcock.

[0024] When the plug valve is opened, the medium will flow through the flow port 5. Since the rotating cylinder 8 is installed in the flow port 5, the medium will pass through the inside of the rotating cylinder 8. During the flow of the medium, the impurities inside it will adhere to the inner wall of the rotating cylinder 8. Over time, the diameter of the rotating cylinder 8 will become smaller, affecting the flow of the medium. In the present invention, each time the plug valve is closed, the valve core 4 rotates counterclockwise with the rotating rod 6, and the ratchet gear 20 is restricted by the brake block 22, so that the ratchet gear 20 cannot rotate, and the prism 16 is restricted by the prism hole 21. Therefore, at this time, the prism 16 plug valve and the first bevel gear 13 cannot rotate. The first bevel gear 13 is in a stationary state, so when the valve core 4 rotates, it will drive the second bevel gear 14 to rotate synchronously, and the second bevel gear 14 will rotate along the meshing position with the first bevel gear 13. When the second bevel gear 14 rotates along the meshing position of the first bevel gear 13, it will rotate on its own. When the second bevel gear 14 rotates on its own, it will synchronously drive the driving gear 15 to rotate. When the driving gear 15 rotates, it will drive the meshing rotating cylinder 8 to rotate. The driving gear 15 drives the rotating cylinder 8 in a way that the small gear drives the large gear to rotate, so that the driving gear 15 is more labor-saving when driving the rotating cylinder 8. When the rotating cylinder 8 rotates, the scraper 9 will scrape off the sticky impurities on the inner wall of the rotating cylinder 8. When the stopcock is opened, the valve core 4 rotates clockwise, and the valve core 4 drives the first bevel gear 13 and the prism 16 to rotate synchronously when rotating. The prism 16 drives the ratchet gear 20 to rotate through the prism hole 21 when rotating. When the ratchet gear 20 rotates, the inclined surface of its own ratchet teeth will squeeze the inclined surface of the brake block 22, so that the brake block 22 disengages from between the two sets of ratchet teeth and squeezes the first spring 23, ensuring that the ratchet gear 20 can rotate normally. The purpose of this is that when the valve core 4 rotates clockwise, the first bevel gear 13 and the second bevel gear 14 rotate together with the valve core 4 to ensure that the rotating cylinder 8 is fixed. This design drives the rotating cylinder 8 to rotate a small distance each time the plug valve is closed. When the rotating cylinder 8 rotates, the scraper 9 cleans the small distance that the inner wall of the rotating cylinder 8 passes, and impurities will remain on the scraper 9. In the process of opening the plug valve, the rotating cylinder 8 is ensured to be fixed, and the medium flowing inside the rotating cylinder 8 will impact the scraper 9, thereby taking away the impurities on the scraper 9. As the plug valve is continuously opened and closed, the rotating cylinder 8 will rotate a full circle, so that the scraper 9 can clean the entire inner wall of the rotating cylinder 8, and the flow port 5 of the valve core 4 is automatically cleaned during the daily use of the plug valve. The cleaned flow port 5 can ensure the smooth flow of the medium in the plug valve, reduce the flow resistance caused by blockage or reduced caliber, and improve the flow efficiency of the medium. Since the plug valve has an automatic cleaning function, the frequency and difficulty of manual cleaning are reduced, which makes maintenance work easier and faster, reduces the skill requirements for maintenance personnel, and reduces the possible failures caused by improper maintenance.

[0025] like Figures 1 to 15 As shown, the connecting block 12 is divided into two groups, and the two groups of connecting blocks 12 are respectively fixedly connected to the two ends of the scraper strip 9, and the connecting block 12 is made of elastic material; the corrugated strip 10 is fixedly connected to the upper end of the scraper strip 9; the limiting frame 11, the limiting frame 11 is designed in a rectangular frame structure, the connecting block 12 is arranged in the limiting frame 11, and the lower end of the limiting frame 11 is fixedly connected to the inner wall of the flow port 5.

[0026] By adopting the above technical solution, the medium will pass through the corrugated strip 10 when flowing from the inside of the rotating cylinder 8, and the flowing medium will drive the corrugated strip 10 to swing. The corrugated strip 10 will drive the scraper strip 9 when swinging. The connecting blocks 12 at both ends of the scraper strip 9 are made of elastic material, which ensures that the scraper strip 9 can swing with the corrugated strip 10. The installed limit frame 11 limits the scraper strip 9 to swing only left and right, and cannot swing up and down. The scraper strip 9 quickly swings left and right, which helps the impurities on the scraper strip 9 to be detached and finally flow away with the medium. When the scraper strip 9 cleans the inner wall of the rotating cylinder 8, the scraper strip 9 cannot swing up and down, but can only swing left and right, which can ensure the cleaning effect of the scraper strip 9 on the inner wall of the rotating cylinder 8.

[0027] like Figures 1 to 15 As shown, the upper cover plate 17 is fixed to the valve body 1 by bolts.

[0028] By adopting the above technical solution, when the valve core 4 needs to be disassembled for maintenance, it is only necessary to remove the bolts, pull out the prism 16 from the ratchet gear 20 to remove the upper cover plate 17, and pull the valve core 4 upward to take it out, which is simple and convenient to operate.

[0029] like Figures 1 to 15 As shown, the annular groove 32 is opened on the inner wall of the flow port 5; the annular slider 24 is rotatably arranged in the annular groove 32, and the inner circular surface of the annular slider 24 is fixedly connected to the outer circular surface of the rotating cylinder 8.

[0030] By adopting the above technical solution, when the rotating cylinder 8 rotates, the annular slider 24 is driven to rotate in the annular slide groove 32 , thereby ensuring that the rotating cylinder 8 can rotate stably in the flow port 5 . Example 2

[0031] like Figures 1 to 15As shown, the driving assembly also includes a groove 27, which is arranged in multiple groups. The multiple groups of grooves 27 are opened from top to bottom on the side surface of the rotating rod 6, and the lower end of the rotating rod 6 is inserted into the valve core 4; a stop block 28, which is arranged inside the groove 27, and the stop block 28 is rotatably connected to the inner wall of the groove 27 through a rotating shaft; a second spring 29, the second spring 29 is fixedly installed at the lower end of the stop block 28, and the lower end of the second spring 29 is fixedly connected to the inner wall of the groove 27; a connecting column 25, one end of the connecting column 25 is fixedly connected to the ratchet gear 20, and the end of the connecting column 25 away from the ratchet gear 20 is fixedly connected to the driving gear 15, and the ratchet gear 20 is arranged on one side of the stop block 28, and a fixed block 30, which is fixedly installed on the side surface of the rotating rod 6; a third spring 31, the upper end of the third spring 31 is fixedly connected to the fixed block 30, and the lower end of the third spring 31 is fixedly connected to the valve core 4; A sleeve rod 18, the sleeve rod 18 is sleeved on the outside of the rotating rod 6, and the output shaft of the electric actuator 7 is fixedly connected to the upper end of the sleeve rod 18; a permanent magnetic disk 33, the permanent magnetic disk 33 is fixedly installed on the side surface of the rotating rod 6; an electromagnet 34, the electromagnet 34 is arranged at the upper end of the permanent magnetic disk 33, and the electromagnet 34 is installed on the electric actuator 7.

[0032] By adopting the above technical solution, when opening or closing the stopcock, the electromagnet 34 is first energized, the electromagnet 34 generates magnetism, and at this time, the magnetic pole at the lower end of the electromagnet 34 is the same as the magnetic pole at the upper end of the permanent magnetic disk 33, and a magnetic repulsion force is generated between the two, pushing the permanent magnetic disk 33 to move downward. When the permanent magnetic disk 33 moves, it will drive the rotating rod 6 to move downward synchronously. The rotating rod 6 extends outward from the sleeve rod 18. When the rotating rod 6 moves downward, it will drive the ratchet gear 20 to rotate through multiple sets of stop blocks 28. When the ratchet gear 20 rotates, it will drive the driving gear 15 to rotate through the connecting column 25. When the driving gear 15 rotates, it will drive the meshing rotating cylinder 8 to rotate. When the rotating cylinder 8 rotates, the scraper bar 9 will clean the inner wall of the rotating cylinder 8. After the rotating rod 6 moves downward, the electric actuator 7 controls the sleeve rod 18 to rotate forward and reverse. When the sleeve rod 18 rotates forward and reverse, it will synchronously drive the rotating rod 6 to rotate. The plug valve is opened or closed by controlling the forward and reverse rotation of the rotating rod 6. When the rotating rod 6 moves downward, it will drive the fixed block 30 to squeeze the third spring 31. After the electromagnet 34 is powered off, the third spring 31 will reset and push the fixed block 30 to move upward, and at the same time drive the rotating rod 6 to move upward. When the rotating rod 6 moves upward, it will drive the stop block 28 to move upward. When the stop block 28 moves upward, it will be squeezed by the ratchet gear 20. The stop block 28 deflects downward at the shaft and squeezes the second spring 29. In this way, the rotating rod 6 will not drive the ratchet gear 20 to reverse when moving upward, ensuring that the rotating cylinder 8 will not rotate in the opposite direction. This design enables the rotary valve to have an automatic cleaning function during use. Through the automatic cleaning function, the wear and corrosion of the flow port 5 due to the accumulation of impurities is reduced, thereby extending the service life of the plug valve, which not only reduces the maintenance cost, but also improves the reliability and availability of the equipment.

[0033] like Figures 1 to 15 As shown, the rotating disk 26 is sleeved on the outside of the rotating rod 6, and the rotating disk 26 is rotatably connected to the upper cover plate 17.

[0034] By adopting the above technical solution and installing the rotating disk 26, the rotation and up and down movement of the rotating rod 6 can be ensured.

[0035] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plug valve that is easy to maintain, characterized in that: include: A valve body (1) and a valve core (4), wherein the valve core (4) is arranged in the valve body (1), and the valve core (4) can rotate inside the valve body (1); A liquid inlet pipe (2), the liquid inlet pipe (2) being installed at the left end of the valve body (1); a liquid outlet pipe (3), the liquid outlet pipe (3) being mounted at the right end of the valve body (1), and the interior of the liquid outlet pipe (3) being in communication with the interior of the liquid inlet pipe (2); A flow opening (5), the flow opening (5) being formed through the valve core (4) at a central position thereof; An upper cover plate (17), wherein the upper cover plate (17) is mounted on the upper end of the valve body (1); A rotating rod (6), the rotating rod (6) being connected to the upper end of the valve core (4), the rotating rod (6) being used to control the valve core (4) to rotate in the valve body (1), the upper end of the rotating rod (6) penetrating the upper cover plate (17) and extending to the outside; An electric actuator (7), wherein the electric actuator (7) is mounted on the upper end of the rotating rod (6); A rotating cylinder (8), wherein the rotating cylinder (8) is sleeved in the circulation port (5), and the outer circumferential surface of the rotating cylinder (8) is rotatably connected to the inner wall of the circulation port (5); A scraper bar (9), wherein the scraper bar (9) is arranged on the inner wall of the rotating cylinder (8); A drive assembly is installed in the valve body (1), and is used to drive the rotating cylinder (8) to rotate. The drive assembly comprises a drive gear (15) and a ratchet gear (20). The drive gear (15) is installed in the valve core (4), and the drive gear (15) is meshingly connected with the outer cylindrical surface of the rotating cylinder (8). When the rotating rod (6) controls the valve core (4) to rotate, it drives the ratchet gear (20) to rotate, and the rotation of the ratchet gear (20) controls the rotation of the drive gear (15).

2. The plug valve that is easy to maintain according to claim 1, characterized in that: The drive components also include: A sink groove (19), the sink groove (19) being opened at a central position of an inner bottom wall of the valve body (1), and the ratchet gear (20) being arranged in the sink groove (19); A brake block (22), wherein the brake block (22) is clamped between two groups of ratchet teeth on the ratchet gear (20); a first spring (23), one end of the first spring (23) being fixedly connected to the brake block (22), and one end of the first spring (23) being away from the brake block (22) being fixedly connected to the valve body (1); a first bevel gear (13), the first bevel gear (13) being mounted at the center position of the upper end of the ratchet gear (20), the first bevel gear (13) being arranged in the valve core (4), and the upper end of the valve core (4) being fixedly connected to the rotating rod (6); A second bevel gear (14), the second bevel gear (14) is meshingly connected with the first bevel gear (13), and the left end of the second bevel gear (14) is fixedly connected to the driving gear (15).

3. The plug valve that is easy to maintain according to claim 1, characterized in that: The drive components also include: Grooves (27), the grooves (27) being arranged in a plurality of groups, the plurality of groups of grooves (27) being opened on the side surface of the rotating rod (6) from top to bottom, the lower end of the rotating rod (6) being inserted into the valve core (4); A stop block (28), wherein the stop block (28) is arranged inside the groove (27), and the stop block (28) is rotatably connected to the inner wall of the groove (27) via a rotating shaft; a second spring (29), the second spring (29) being fixedly mounted on the lower end of the stop block (28), the lower end of the second spring (29) being fixedly connected to the inner wall of the groove (27); A connecting column (25), one end of the connecting column (25) being fixedly connected to the ratchet gear (20), one end of the connecting column (25) away from the ratchet gear (20) being fixedly connected to the driving gear (15), and the ratchet gear (20) being arranged on one side of the stop block (28).

4. The plug valve easy to maintain according to claim 3, characterized in that: include: A sleeve rod (18), the sleeve rod (18) being sleeved on the outside of the rotating rod (6), and the output shaft of the electric actuator (7) being fixedly connected to the upper end of the sleeve rod (18); A permanent magnetic disk (33), wherein the permanent magnetic disk (33) is fixedly mounted on a side surface of the rotating rod (6); An electromagnet (34), wherein the electromagnet (34) is arranged at the upper end of the permanent magnet disk (33), and the electromagnet (34) is mounted on the electric actuator (7).

5. The plug valve that is easy to maintain according to claim 1, characterized in that: include: A fixed block (30), the fixed block (30) being fixedly mounted on a side surface of the rotating rod (6); A third spring (31), wherein the upper end of the third spring (31) is fixedly connected to the fixing block (30), and the lower end of the third spring (31) is fixedly connected to the valve core (4).

6. The plug valve easy to maintain according to claim 5, characterized in that: include: Connecting blocks (12), the connecting blocks (12) being in two groups, the two groups of connecting blocks (12) being fixedly connected to two ends of the scraper strip (9) respectively, the connecting blocks (12) being made of elastic material; A corrugated strip (10), wherein the corrugated strip (10) is fixedly connected to the upper end of the scraper strip (9).

7. The plug valve easy to maintain according to claim 6, characterized in that: include: The limiting frame (11) is designed as a rectangular frame structure, the connecting block (12) is arranged in the limiting frame (11), and the lower end of the limiting frame (11) is fixedly connected to the inner wall of the flow port (5).

8. The plug valve easy to maintain according to claim 7, characterized in that: include: A prismatic hole (21), wherein the prismatic hole (21) is provided at a central position of the ratchet gear (20); A prism (16), wherein the prism (16) is fixedly mounted on the lower end of the first bevel gear (13), the prism (16) is used to be inserted into the prism hole (21), and the upper cover plate (17) is fixed to the valve body (1) by bolts.

9. The plug valve that is easy to maintain according to claim 1, characterized in that: include: an annular chute (32), wherein the annular chute (32) is formed on the inner wall of the flow opening (5); An annular slider (24), the annular slider (24) being rotatably disposed in an annular slide groove (32), the inner circumferential surface of the annular slider (24) being fixedly connected to the outer circumferential surface of the rotating cylinder (8).

10. The plug valve easy to maintain according to claim 4, characterized in that: include: A rotating disk (26), wherein the rotating disk (26) is sleeved on the outside of the rotating rod (6), and the rotating disk (26) is rotatably connected to the upper cover plate (17).

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