A globe valve that is easy to maintain

Abstract

The present invention discloses a cock valve that is easy to maintain, belonging to the field of cock valves, and includes a valve body and a valve core. The valve core is arranged inside 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, which is installed at the right end of the valve body, and the inside of the liquid outlet pipe is communicated with the inside of the liquid inlet pipe; a flow port, which is penetrated and opened at the central position of the valve core; an upper cover plate, which is installed at the upper end of the valve body; a rotating rod, which is connected to the upper end of the valve core, and the rotating rod is used to control the rotation of the valve core inside the valve body, and the upper end of the rotating rod penetrates through the upper cover plate and extends to the outside. The present invention can realize automatic cleaning of the flow port of the valve core during the daily use of the cock valve. The clean flow port can ensure the smooth flow of the medium in the cock valve, reduce the flow resistance caused by blockage or reduced caliber, and improve the flow efficiency of the medium.

Description

Technical Field

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

[0002] As a common fluid control device, the 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 passage by rotating the valve core, so as to realize the flow or cut-off of the fluid. However, in the actual use process, the stability and reliability of the plug valve are often affected by various factors, and the adhesion of impurities in the medium to the valve core passage opening is an issue 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 passage opening of its valve core. These media often contain various impurities, such as dust, sand grains, rust debris, oil scale, etc. During the fluid flow process, these impurities will gradually adhere to the passage opening of the valve core due to the change in flow velocity, the formation of eddy currents, and the frictional force between the fluid and the valve core surface.

[0004] Over time, more and more impurities will adhere to the passage opening. These impurities will not only reduce the effective flow area of the passage opening, but also change the flow characteristics when the fluid passes through. Specifically, the accumulation of impurities will cause the passage opening to become narrower, increasing the resistance when the fluid passes through, reducing the flow rate. In extreme cases, the passage opening may even be completely blocked, making it impossible for the medium to flow in the plug valve. The blockage of the plug valve passage opening will bring a series of serious consequences. First of all, it will affect the normal operation of the plug valve, making the valve unable to accurately control the flow or cut-off of the fluid. This may lead to problems such as fluid leakage, pressure fluctuations, or flow instability during the production process, thereby affecting the product quality and production efficiency. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a plug valve that is easy to maintain, which 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.

[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. The valve core is arranged in the valve body and can rotate inside the valve body;

[0008] An inlet pipe, which is installed at the left end of the valve body;

[0009] The liquid outlet pipe is installed at the right end of the valve body, and the inside of the liquid outlet pipe is communicated with the inside of the liquid inlet pipe;

[0010] The circulation port is formed through the center position of the valve core;

[0011] The upper cover plate is installed at the upper end of the valve body;

[0012] The rotating rod is connected to the upper end of the valve core. The rotating rod is used to control the rotation of the valve core in the valve body, and the upper end of the rotating rod penetrates through the upper cover plate and extends to the outside;

[0013] The electric actuator is installed at the upper end of the rotating rod;

[0014] The rotating cylinder is sleeved in the circulation port, and the outer circumferential surface of the rotating cylinder is rotatably connected to the inner wall of the circulation port;

[0015] The scraping strip is arranged on the inner wall of the rotating cylinder;

[0016] The driving assembly is installed in the valve body. The driving assembly 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 with the outer circumferential surface of the rotating cylinder. When the rotating rod controls the rotation of the valve core, the ratchet gear will be driven to rotate, and the rotation of the ratchet gear controls the rotation of the driving gear.

[0017] Further, the driving assembly further includes a sunk groove formed at the center position of the inner bottom wall of the valve body, and the ratchet gear is arranged in the sunk groove;

[0018] The brake block is clamped between two groups of ratchet teeth on the ratchet gear;

[0019] One end of the first spring is fixedly connected to the brake block, and the other end of the first spring away from the brake block is fixedly connected to the valve body;

[0020] The first bevel gear is installed at the center position of the upper end of the ratchet gear. The first bevel gear is arranged in the valve core, and the upper end of the valve core is fixedly connected to the rotating rod;

[0021] The second bevel gear is meshed with the first bevel gear, and the left end of the second bevel gear is fixedly connected to the driving gear.

[0022] Further, the driving assembly further includes:

[0023] The grooves are provided in multiple groups. The multiple groups of grooves are formed 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;

[0024] A stop block, the stop block is arranged inside the groove, and the stop block is rotatably connected to the inner wall of the groove through a rotating shaft;

[0025] A second spring, the second spring is fixedly installed at 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;

[0026] A connecting column, one end of the connecting column is fixedly connected to the ratchet gear, the end of the connecting column far from the ratchet gear is fixedly connected to the driving gear, and the ratchet gear is arranged on one side of the stop block.

[0027] Further, it includes a sleeve rod, the sleeve rod is sleeved outside the rotating rod, and the output shaft of the electric actuator is fixedly connected to the upper end of the sleeve rod;

[0028] A permanent magnet disk, the permanent magnet disk is fixedly installed on the side surface of the rotating rod;

[0029] An electromagnet, the electromagnet is arranged above the permanent magnet disk, and the electromagnet is installed on the electric actuator.

[0030] Further, it includes a fixing block, the fixing block is fixedly installed on the side surface of the rotating rod;

[0031] A third spring, 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.

[0032] Further, it includes a connecting block, there are two groups of connecting blocks, the two groups of connecting blocks are respectively fixedly connected to both ends of the scraping strip, and the connecting blocks are made of elastic materials;

[0033] A corrugated strip, the corrugated strip is fixedly connected to the upper end of the scraping strip.

[0034] Further, it includes a limiting frame, the limiting frame is designed in a rectangular frame structure, the connecting block is arranged inside the limiting frame, and the lower end of the limiting frame is fixedly connected to the inner wall of the flow port.

[0035] Further, it includes a prism hole, the prism hole is opened at the central position of the ratchet gear;

[0036] A prism, the prism is fixedly installed at the lower end of the first bevel gear, the prism is used for being inserted into the prism hole, and the upper cover plate is fixed to the valve body by bolts.

[0037] Further, it includes an annular sliding groove, the annular sliding groove is opened on the inner wall of the flow port;

[0038] An annular sliding block, the annular sliding block is rotatably arranged in the annular sliding groove, and the inner circular surface of the annular sliding block is fixedly connected to the outer circular surface of the rotating cylinder.

[0039] Further, it includes a rotating disk, the rotating disk is sleeved outside the rotating rod, and the rotating disk is rotatably connected to the upper cover plate.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] In this solution, the flow port of the spool valve is automatically cleaned during the daily use of the spool valve. The clean flow port can ensure the smooth flow of the medium in the spool valve, reduce the flow resistance caused by blockage or reduced diameter, and improve the flow efficiency of the medium. Since the spool valve has an automatic cleaning function, the frequency and difficulty of manual cleaning are reduced. This makes the maintenance work more simple and fast, reduces the skill requirements for maintenance personnel, and also reduces the possible failures caused by improper maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0043] Figure 1 It is the external view of the overall structure of the present invention;

[0044] Figure 2 It is the structural schematic diagram of the rotating rod of the present invention;

[0045] Figure 3 It is the display diagram of the upper end opening of the valve body of the present invention;

[0046] Figure 4 It is the structural schematic diagram of the spool of the present invention;

[0047] Figure 5 For the present invention Figure 4 The enlarged view of part A;

[0048] Figure 6 It is the structural schematic diagram of the driving component in the first embodiment of the present invention;

[0049] Figure 7 It is the display diagram of the annular chute of the present invention;

[0050] Figure 8 It is the bottom view of the spool of the present invention;

[0051] Figure 9 It is the structural schematic diagram of the sunk groove of the present invention;

[0052] Figure 10Structural schematic diagram of the brake block and the ratchet gear of the present invention;

[0053] Figure 11 Structural schematic diagram of the drive assembly in the second embodiment of the present invention;

[0054] Figure 12 For the present invention Figure 11 Enlarged view of part B in;

[0055] Figure 13 Structural schematic diagram of the stop block and the ratchet gear in the second embodiment of the present invention;

[0056] Figure 14 Structural schematic diagram of the second spring of the present invention;

[0057] Figure 15 Cross-sectional view of the upper half of the valve core in the second embodiment of the present invention.

[0058] Explanation of the reference numerals in the figure:

[0059] 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. Scraping strip; 10. Corrugated 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. Sunk groove; 20. Ratchet gear; 21. Prism hole; 22. Brake block; 23. First spring; 24. Annular slider; 25. Connecting column; 26. Rotating disc; 27. Groove; 28. Stop block; 29. Second spring; 30. Fixed block; 31. Third spring; 32. Annular sliding groove; 33. Permanent magnetic disk; 34. Electromagnet. Detailed implementation manners

[0060] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0061] Please refer to Figures 1 to 15, A plug valve that is easy to maintain, comprising a valve body 1 and a valve core 4. The valve core 4 is arranged inside the valve body 1 and can rotate inside the valve body 1; a liquid inlet pipe 2, which is installed at the left end of the valve body 1; a liquid outlet pipe 3, which is installed at the right end of the valve body 1, and the inside of the liquid outlet pipe 3 is interconnected with the inside of the liquid inlet pipe 2; a flow port 5, which is penetrated and opened at the central position of the valve core 4; an upper cover plate 17, which is installed at the upper end of the valve body 1; a rotating rod 6, which is connected to the upper end of the valve core 4, and the rotating rod 6 is used to control the rotation of the valve core 4 inside the valve body 1. The upper end of the rotating rod 6 penetrates through the upper cover plate 17 and extends to the outside; an electric actuator 7, which is installed at the upper end of the rotating rod 6; a rotating cylinder 8, which is sleeved inside the flow port 5, and the outer circumferential surface of the rotating cylinder 8 is rotatably connected to the inner wall of the flow port 5; a scraping strip 9, which is arranged on the inner wall of the rotating cylinder 8; a driving assembly, which is installed inside the valve body 1 and 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 inside the valve core 4, and the driving gear 15 is meshed and connected with the outer circumferential surface of the rotating cylinder 8. When the rotating rod 6 controls the rotation of the valve core 4, it will drive the ratchet gear 20 to rotate, and the rotation of the ratchet gear 20 is used to control the rotation of the driving gear 15;

[0062] The driving assembly further includes a sunk groove 19, which is opened at the central position of the inner bottom wall of the valve body 1, and the ratchet gear 20 is arranged inside the sunk 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 which 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 central position of the upper end of the ratchet gear 20, the first bevel gear 13 is arranged inside 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 with the first bevel gear 13, and the left end of the second bevel gear 14 is fixedly connected to the driving gear 15;

[0063] A prism hole 21, which is opened at the central position of the ratchet gear 20; a prism 16, which is fixedly installed at the lower end of the first bevel gear 13, and the prism 16 is used to be inserted into the prism hole 21.

[0064] By adopting the above technical solution, when using the plug valve of the present invention, first install the liquid inlet pipe 2 and the liquid outlet pipe 3 on the pipeline for transporting the medium. When it is necessary to open the plug valve, start the electric actuator 7, and the electric actuator 7 will drive the rotating rod 6 to rotate. When the rotating rod 6 rotates, it will drive 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 plug valve is fully opened. When it is necessary to close the plug valve, only need to control the rotating rod 6 to rotate in the reverse 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, that is, the closing of the plug valve is realized.

[0065] When the cock valve is opened, the medium will flow through the flow port 5. Since the rotary cylinder 8 is installed inside the flow port 5, the medium will pass through the inside of the rotary cylinder 8. During the flow of the medium, the impurities inside it will adhere to the inner wall of the rotary cylinder 8. Over time, the diameter of the rotary cylinder 8 will become smaller, affecting the flow of the medium. In the present invention, every time the cock valve is closed, the valve core 4 rotates counterclockwise following the rotating rod 6. The ratchet gear 20 is restricted by the brake block 22, making the ratchet gear 20 unable to rotate. And the prism 16 is also restricted by the prism hole 21. So at this time, the cock valve and the first bevel gear 13 with the prism 16 are unable to rotate. At this time, the first bevel gear 13 is in a stationary state. Then when the valve core 4 rotates, it will drive the second bevel gear 14 to rotate synchronously. The second bevel gear 14 will rotate along the meshing part with the first bevel gear 13. When the second bevel gear 14 rotates along the meshing part with the first bevel gear 13, it will rotate on its own axis. When the second bevel gear 14 rotates on its own axis, it will synchronously drive the drive gear 15 to rotate. When the drive gear 15 rotates, it will drive the meshing-connected rotary cylinder 8 to rotate. The driving mode of the drive gear 15 on the rotary cylinder 8 is the rotation mode of a small gear driving a large gear. In this way, it is more labor-saving for the drive gear 15 to drive the rotary cylinder 8. When the rotary cylinder 8 rotates, the scraping strip 9 will scrape off the impurities adhering to the inner wall of the rotary cylinder 8. When the cock valve is opened, the valve core 4 rotates clockwise. When the valve core 4 rotates, it will drive the first bevel gear 13 and the prism 16 to rotate synchronously. When the prism 16 rotates, it will drive the ratchet gear 20 to rotate through the prism hole 21. When the ratchet gear 20 rotates, the inclined surface of its own ratchet teeth will squeeze the inclined surface of the brake block 22, making the brake block 22 disengage from between the two groups of ratchet teeth and squeeze the first spring 23, ensuring that the ratchet gear 20 can rotate normally. The purpose of doing this is that when the valve core 4 rotates clockwise, the first bevel gear 13 and the second bevel gear 14 will rotate together following the valve core 4 to ensure that the rotary cylinder 8 is fixed. Such a design will drive the rotary cylinder 8 to rotate a small distance every time the cock valve is closed. When the rotary cylinder 8 rotates, the scraping strip 9 will clean a small distance on the inner wall of the rotary cylinder 8 that the scraping strip 9 passes through. The impurities will remain on the scraping strip 9. During the process of opening the cock valve, it is ensured that the rotary cylinder 8 remains stationary. The medium flowing inside the rotary cylinder 8 will impact the scraping strip 9, thereby taking away the impurities on the scraping strip 9. As the cock valve is continuously opened and closed, the rotary cylinder 8 will rotate a full circle. In this way, the scraping strip 9 can clean the entire inner wall of the rotary cylinder 8, realizing the automatic cleaning of the flow port 5 of the valve core 4 during the daily use of the cock valve. The clean flow port 5 can ensure the smooth flow of the medium inside the cock valve, reduce the flow resistance caused by blockage or reduced diameter, and improve the flow efficiency of the medium. Since the cock valve has an automatic cleaning function, the frequency and difficulty of manual cleaning are reduced. This makes the maintenance work more simple and fast, reduces the skill requirements for maintenance personnel, and also reduces the possible failures caused by improper maintenance.

[0066] As shown Figures 1 to 15 in FIG. Figures 1 to 15 , there are two connecting blocks 12, which are respectively and fixedly connected to both ends of the scraping strip 9. The connecting blocks 12 are made of elastic materials; there is a corrugated strip 10, which is fixedly connected to the upper end of the scraping strip 9; there is a limiting frame 11, which is designed in a rectangular frame structure. The connecting blocks 12 are arranged inside 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.

[0067] By adopting the above technical solution, when the medium flows inside the rotating cylinder 8, it will pass through the corrugated strip 10. The flowing medium will drive the corrugated strip 10 to swing. When the corrugated strip 10 swings, it will drive the scraping strip 9. The connecting blocks 12 at both ends of the scraping strip 9 are made of elastic materials, ensuring that the scraping strip 9 can swing along with the corrugated strip 10. The installed limiting frame 11 restricts the scraping strip 9 to only swing left and right and cannot swing up and down. Through the rapid left and right swing of the scraping strip 9, it helps the impurities on the scraping strip 9 to break away and finally flow away together with the medium. When the scraping strip 9 cleans the inner wall of the rotating cylinder 8, the scraping strip 9 cannot swing up and down and can only swing left and right, which can ensure the cleaning effect of the scraping strip 9 on the inner wall of the rotating cylinder 8.

[0068] As shown Figures 1 to 15 in FIG. Figures 1 to 15 , the upper cover plate 17 is fixed to the valve body 1 by bolts.

[0069] By adopting the above technical solution, when it is necessary to disassemble the valve core 4 for maintenance, only the bolts need to be disassembled, and the prism 16 is pulled out from the ratchet gear 20, then the upper cover plate 17 can be removed, and the valve core 4 can be taken out by pulling it upward. The operation is simple and convenient.

[0070] As shown Figures 1 to 15 in FIG. Figures 1 to 15 , there is an annular sliding groove 32, which is opened on the inner wall of the flow port 5; there is an annular sliding block 24, which is rotatably arranged in the annular sliding groove 32, and the inner circular surface of the annular sliding block 24 is fixedly connected to the outer circular surface of the rotating cylinder 8.

[0071] By adopting the above technical solution, when the rotating cylinder 8 rotates, it will drive the annular sliding block 24 to rotate in the annular sliding groove 32, ensuring that the rotating cylinder 8 can rotate stably inside the flow port 5. Embodiment 2

[0072] As shown Figures 1 to 15As shown, the driving component further includes a plurality of grooves 27. The plurality of grooves 27 are arranged in a multi-group manner and are opened on the side surface of the rotating rod 6 from top to bottom. The lower end of the rotating rod 6 is inserted into the valve core 4; a stop block 28, 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 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, the end of the connecting column 25 away from the ratchet gear 20 is fixedly connected to the driving gear 15, the ratchet gear 20 is arranged on one side of the stop block 28, a fixed block 30, the fixed block 30 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;

[0073] a sleeve rod 18, the sleeve rod 18 is sleeved outside 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 above the permanent magnetic disk 33, and the electromagnet 34 is installed on the electric actuator 7.

[0074] By adopting the above technical solution, when opening or closing the cock valve, 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 upper magnetic pole of the permanent disk 33. A magnetic repulsive force will be generated between the two, pushing the permanent disk 33 to move downward. When the permanent disk 33 moves, it will drive the rotating rod 6 to move downward synchronously. The rotating rod 6 extends outwards 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 engaged rotating cylinder 8 to rotate. When the rotating cylinder 8 rotates, the scraping strip 9 will clean the inner wall of the rotating cylinder 8. After the rotating rod 6 moves downward, the electric actuator 7 is used to control the forward and reverse rotation of the sleeve rod 18. When the sleeve rod 18 rotates forward and backward, it will synchronously drive the rotating rod 6 to rotate extremely. By controlling the forward and reverse rotation of the rotating rod 6, the operation of opening or closing the cock valve is carried out. 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 rotating 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 reverse direction. Such a 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 caused by impurity accumulation are reduced, thereby extending the service life of the cock valve. This not only reduces the maintenance cost, but also improves the reliability and availability of the equipment.

[0075] As Figures 1 to 15 shown, the rotating disk 26 is sleeved outside the rotating rod 6, and the rotating disk 26 is rotatably connected to the upper cover plate 17.

[0076] By adopting the above technical solution, by installing the rotating disk 26, the rotation and up-and-down movement of the rotating rod 6 can be ensured.

[0077] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and 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 strip (9), the scraper strip (9) being arranged in close contact with the inner wall of the rotating cylinder (8), and the scraper strip (9) and the rotating cylinder (8) being in relative motion; 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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