A bidirectional self-cleaning linear drain valve for use in wastewater treatment

Abstract

This invention discloses a bidirectional self-cleaning linear drain valve for use in wastewater treatment, relating to the field of valve technology. The invention includes a central valve body with an inlet pipe and an outlet pipe connected to it. A coaxial partition plate is fixed inside the central valve body, dividing it into a closed chamber and a flow chamber. A flow control component is installed inside the central valve body to control the opening and closing of the flow chamber. Horizontal cleaning mechanisms are installed inside both the inlet and outlet pipes, meshing with the flow control component. During the opening process of the flow control plate, the upward movement of the drive rack rotates the transmission gear, enabling the rotary cleaning component to move horizontally within the inlet and outlet pipes. Each time the valve is opened, it scrapes off dirt adhering to the inner walls of the inlet and outlet pipes, significantly improving the cleaning effect inside the drain valve.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, and in particular relates to a bidirectional self-cleaning linear drain valve for use in the field of sewage treatment. Background Technology

[0002] In sewage treatment projects, a large number of valves are required. The most commonly used valve is the water valve used to transport sewage, namely the drain valve. After long-term use, a lot of dirt will adhere to the inner wall of the existing drain valve. If it is not effectively cleaned for a long time, it will reduce the outflow of the drain valve and easily cause blockage.

[0003] To address the technical problem of valves being difficult to clean and prone to clogging in existing technologies, a Chinese patent with authorization announcement number CN213982049U discloses a clog-resistant, durable, and easy-to-clean sewage valve, comprising: a water valve assembly, including a water valve body, a flange cover mounted on the top of the water valve body, and a valve mounted on the flange cover; a cleaning assembly, including a sealing flange mounted on the bottom right side of the water valve assembly, a servo motor mounted on the right side of the sealing flange, a rotating shaft mounted on the left side of the sealing flange, and a stirring rod mounted on the rotating shaft; an inlet pipe is provided on the bottom left side of the water valve body, and an outlet pipe is provided on the right side of the water valve body, with the outlet pipe located to the upper right of the inlet pipe, the straight water pipe design reduces water flow interference and avoids impurity residue; a limit block is also installed in the middle of the inner cavity of the water valve body, and the valve is installed in the center of the limit block, which helps to improve the structural stability of the valve and increase its service life.

[0004] However, the above-mentioned sewage valves still have the following drawbacks during use: (1) The cleaning component is only installed inside the inlet pipe. After long-term use, a large amount of dirt will adhere to the inner wall of the outlet pipe, which will easily reduce the outflow rate and make it inconvenient to clean the inside of the outlet pipe; (2) After long-term use, impurities in the sewage will accumulate on the right side of the inlet pipe, which will easily cause blockage at the outlet of the inlet pipe. Frequent disassembly of the cleaning component is required to clean the inside of the inlet pipe, which will easily increase the maintenance cost of the valve. To this end, we provide a bidirectional self-cleaning linear sewage valve for use in the field of sewage treatment to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional self-cleaning linear drain valve for use in the field of wastewater treatment. Through the specific design of the closed cavity, water passage cavity, fixed frame, threaded frame, flow control component and horizontal cleaning mechanism, it solves many technical problems in the background art.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] This invention relates to a bidirectional self-cleaning linear drain valve for use in the field of wastewater treatment, comprising a drain valve body, wherein the drain valve body includes a central valve body, and an inlet pipe and an outlet pipe are respectively connected to the central valve body, wherein the inlet pipe and the outlet pipe are coaxially arranged.

[0008] The central valve body is internally connected and fixed with a coaxial partition plate, which divides the central valve body into a closed cavity and a water passage cavity. The water inlet pipe, the water passage cavity and the water outlet pipe constitute a water conveying channel.

[0009] The central valve body is equipped with a flow control component, which is used to control the opening and closing of the water passage chamber;

[0010] Both the inlet and outlet pipes are equipped with horizontal cleaning mechanisms, which are engaged with the flow control component. The upward movement of the flow control component drives the horizontal cleaning mechanism to rotate horizontally, thereby cleaning the dirt adhering to the inner walls of the inlet and outlet pipes.

[0011] As a preferred embodiment of the present invention, a fixed frame and a threaded frame are respectively provided inside the water inlet pipe and the water outlet pipe, and the fixed frame and the threaded frame are coaxially arranged; the fixed frame is connected and fixed near the central valve body, and the threaded frame is connected and fixed away from the central valve body.

[0012] As a preferred embodiment of the present invention, the horizontal cleaning mechanism includes a horizontal transmission assembly, which includes a transmission gear disposed on the side of the fixed frame near the flow control assembly; a horizontal rotating shaft connected and fixed to the transmission gear, and rotatingly engaged with the fixed frame; and a limiting rod connected and fixed to the circumferential side of the horizontal rotating shaft, the limiting rod extending along the length direction of the horizontal rotating shaft.

[0013] As a preferred embodiment of the present invention, the horizontal cleaning mechanism further includes a rotary cleaning assembly, which includes a hollow connecting tube. The inner wall of the hollow connecting tube is provided with limiting channels corresponding to the limiting rods, and the limiting rods can be slidably arranged along the extension direction of the limiting channels. The hollow connecting tube is threadedly engaged with a threaded bracket at a corresponding position. Two rotary scraping structures are provided, each of which is connected and fixed to the outer wall of the hollow connecting tube. Each rotary scraping structure includes a fixing ring coaxially fixed to the outer wall of the hollow connecting tube. Multiple support rods are evenly distributed circumferentially on the outer wall of the fixing ring, and an arc-shaped scraper is connected and fixed to one end of each support rod.

[0014] As a preferred embodiment of the present invention, the arc-shaped scraper inside the water inlet pipe is in contact with the inner wall of the water inlet pipe, and the arc-shaped scraper inside the water outlet pipe is in contact with the inner wall of the water outlet pipe; one of the rotating scraping structures of the rotating cleaning assembly is attached to the surface of the corresponding fixing frame away from the flow control assembly, and the other rotating scraping structure of the rotating cleaning assembly is attached to the surface of the corresponding threaded frame away from the flow control assembly.

[0015] As a preferred embodiment of the present invention, a positioning notch is provided at the center of the bottom of the water passage cavity, a sealing channel is provided at the top of the partition plate, and a sliding hole communicating with the water passage cavity is provided at the bottom of the sealing channel. Both ends of the sliding hole are configured as curved surfaces coplanar with the inner wall of the central valve body.

[0016] As a preferred embodiment of the present invention, the flow control assembly includes a flow control plate that is clearance-fitted with the sliding hole, both end faces of the flow control plate being configured as curved surfaces that fit against the inner wall of the central valve body; a positioning disk, which is connected and fixed to the bottom of the flow control plate and clearance-fitted with the positioning recess; a drive rack that meshes with a corresponding transmission gear is connected to the peripheral side of the positioning disk via a support rod; and a connecting disk, which is fixed to the top of the flow control plate, and a valve stem that is threadedly fitted to the central valve body is fixed to the top of the connecting disk, the valve stem being driven by a rotating wheel.

[0017] As a preferred embodiment of the present invention, the flow control assembly includes a flow control plate that is clearance-fitted with the sliding hole, both end faces of the flow control plate being configured as curved surfaces that fit against the inner wall of the central valve body; an arc-shaped scraper fixed to each of the two curved side walls of the flow control plate, which fits against the inner wall of the central valve body; a positioning disk, which is connected and fixed to the bottom of the flow control plate and clearance-fitted with the positioning recess; a drive rack that meshes with a corresponding transmission gear is connected to the peripheral side of the positioning disk via a support rod; and a connecting disk, which is fixed to the top of the flow control plate, and a valve stem that is threadedly fitted to the central valve body is fixed to the top of the connecting disk, the valve stem being driven by a rotating wheel.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the process of opening the flow control plate by rotating the valve stem, the upward movement of the drive rack drives the transmission gear to rotate, realizing the rotary cleaning component to rotate horizontally inside the inlet and outlet pipes. Thus, every time the valve is opened, the dirt adhering to the inner wall of the inlet and outlet pipes can be scraped off, which can effectively avoid the long-term residue of dirt. The dirt is scraped off and discharged under the kinetic energy of the water flow, which greatly improves the cleaning efficiency and cleaning effect inside the drain valve.

[0020] 2. During each valve opening process, this invention not only cleans the inner walls of the valve's inlet and outlet pipes, but also simultaneously cleans the dirt adhering to the inner wall of the central valve body through the up-and-down movement of the arc-shaped scraper. This achieves rapid removal of dirt adhering to the entire inner wall of the drain valve, increasing the cleaning effect of the drain valve.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a bidirectional self-cleaning linear drain valve used in the field of wastewater treatment.

[0024] Figure 2 This is a schematic diagram of the internal structure of the drain valve.

[0025] Figure 3 This is a schematic diagram of the structure of the drain valve body.

[0026] Figure 4 for Figure 3 The front view of the structure.

[0027] Figure 5 This is a schematic diagram of the horizontal cleaning mechanism.

[0028] Figure 6 This is a schematic diagram of the rotary cleaning assembly.

[0029] Figure 7 for Figure 6 The front view of the structure.

[0030] Figure 8 This is a schematic diagram of the horizontal transmission assembly.

[0031] Figure 9 This is a schematic diagram of the flow control component in Example 1.

[0032] Figure 10 for Figure 9 The front view of the structure.

[0033] Figure 11 This is a schematic diagram of the flow control component in Example 2.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1- Drain valve body, 10- Central valve body, 11- Inlet pipe, 12- Outlet pipe, 13- Divider plate, 14- Closed cavity, 15- Water passage cavity, 16- Fixing bracket, 17- Threaded bracket, 18- Positioning notch, 19- Sealing channel, 110- Sliding hole, 2- Flow control assembly, 20- Flow control plate, 21- Positioning plate, 22- Drive rack, 23- Connecting plate, 24- Valve stem, 25- Rotating wheel, 26- Arc-shaped scraper, 3- Horizontal cleaning mechanism, 31- Horizontal transmission assembly, 310- Transmission gear, 311- Horizontal rotating shaft, 312- Limiting rod, 32- Rotary cleaning assembly, 320- Hollow connecting pipe, 321- Limiting channel, 322- Fixing ring, 323- Support rod, 324- Arc-shaped scraper. Detailed Implementation

[0036] 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.

[0037] Example 1

[0038] Please see Figure 1-11 The present invention is a bidirectional self-cleaning linear drain valve applied in the field of sewage treatment, including a drain valve body 1, the drain valve body 1 including a central valve body 10, an inlet pipe 11 and an outlet pipe 12 respectively connected to the central valve body 10, the inlet pipe 11 and the outlet pipe 12 are coaxially arranged, thereby forming a linear drain valve.

[0039] The central valve body 10 is internally connected and fixed with a coaxial partition plate 13. The partition plate 13 divides the central valve body 10 into a closed chamber 14 and a water passage chamber 15. The closed chamber 14 is located above the water passage chamber 15. The inlet pipe 11, the water passage chamber 15 and the outlet pipe 12 form a water conveying channel. When the water passage chamber 15 is in the open state, the sewage in the inlet pipe 11 can be transported to the outlet pipe 12, and then the sewage is transported to the subsequent treatment structure by the outlet pipe 12.

[0040] The central valve body 10 is equipped with a flow control component 2, which is used to control the opening and closing of the water passage chamber 15.

[0041] Both the inlet pipe 11 and the outlet pipe 12 are equipped with a horizontal cleaning mechanism 3, which meshes with the flow control component 2. The flow control component 2 moves upward to drive the horizontal cleaning mechanism 3 to rotate horizontally, thereby cleaning the dirt adhering to the inner wall of the inlet pipe 11 and the outlet pipe 12.

[0042] In this embodiment of the invention, a fixing frame 16 and a threaded frame 17 are respectively provided inside the water inlet pipe 11 and the water outlet pipe 12. The fixing frame 16 and the threaded frame 17 are coaxially arranged. The fixing frame 16 is connected and fixed near the central valve body 10, and the threaded frame 17 is connected and fixed away from the central valve body 10.

[0043] In this embodiment of the invention, the horizontal cleaning mechanism 3 includes a horizontal transmission assembly 31. During the rotation of the horizontal transmission assembly 31, the horizontal cleaning mechanism 3 can scrape off the dirt adhering to the inner walls of the inlet pipe 11 and the outlet pipe 12. The horizontal transmission assembly 31 includes a transmission gear 310 and a horizontal rotating shaft 311. The transmission gear 310 is disposed on the side of the fixed frame 16 near the flow control assembly 2. The horizontal rotating shaft 311 is connected and fixed to the transmission gear 310, and it is rotatably engaged with the fixed frame 16. A limit rod 312 is connected and fixed to the peripheral side of the horizontal rotating shaft 311, and the limit rod 312 extends along the length direction of the horizontal rotating shaft 311.

[0044] In this embodiment of the invention, the horizontal cleaning mechanism 3 further includes a rotary cleaning component 32. During the rotation of the horizontal transmission component 31, the rotary cleaning component 32 can rotate horizontally within the inlet pipe 11 and the outlet pipe 12. The rotary cleaning component 32 includes a hollow connecting pipe 320 and two rotary scraping structures. The inner wall of the hollow connecting pipe 320 is provided with a limiting groove 321 corresponding to the limiting rod 312. The limiting rod 312 can slide along the extension direction of the limiting groove 321. The hollow connecting pipe 320 is threadedly engaged with the threaded bracket 17 at the corresponding position. During the rotation of the horizontal transmission component 31, the sliding engagement between the limiting rod 312 and the limiting groove 321 can drive the rotation of the hollow connecting pipe 320. During this process, the hollow connecting pipe 320 slides along the length direction of the horizontal rotating shaft 311, thereby realizing the rotary horizontal movement of the two rotary scraping structures, thus achieving the scraping of dirt adhering to the inner wall of the inlet pipe 11 and the inner wall of the outlet pipe 12.

[0045] The rotating scraping structure is fixed to the outer wall of the hollow connecting pipe 320. The rotating scraping structure includes a fixing ring 322 coaxially fixed to the outer wall of the hollow connecting pipe 320. Multiple support rods 323 are evenly distributed circumferentially on the outer wall of the fixing ring 322. One end of each support rod 323 is connected to and fixed with an arc-shaped scraper 324. The arc-shaped scraper 324 inside the water inlet pipe 11 fits against the inner wall of the water inlet pipe 11, and the arc-shaped scraper 324 inside the water outlet pipe 12 fits against the inner wall of the water outlet pipe 12. One of the rotating scraping components of the rotating cleaning assembly 32... The structure is attached to the surface of the corresponding fixed frame 16 away from the flow control component 2, and another rotating scraping structure of the rotary cleaning component 32 is attached to the surface of the corresponding threaded frame 17 away from the flow control component 2; during the rotation of the hollow connecting pipe 320, the arc-shaped scraper 324 rotates along the inner wall of the inlet pipe 11 or the inner wall of the outlet pipe 12, and the arc-shaped scraper 324 moves in a spiral trajectory, thereby achieving complete scraping of dirt adhering to the inner wall of the inlet pipe 11 or the inner wall of the outlet pipe 12, and improving the dirt cleaning effect.

[0046] In this embodiment of the invention, a positioning notch 18 is provided at the bottom center of the water passage cavity 15, and a sealing channel 19 is provided at the top of the partition plate 13. A rubber sealing strip can be placed in the sealing channel 19 to increase the sealing effect between the water passage cavity 15 and the closed cavity 14. A sliding hole 110 communicating with the water passage cavity 15 is provided at the bottom of the sealing channel 19. Both ends of the sliding hole 110 are set as curved surface structures coplanar with the inner wall of the central valve body 10.

[0047] In this embodiment of the invention, the flow control component 2 includes:

[0048] The flow control plate 20, which is in clearance fit with the sliding hole 110, controls the size of the water inlet of the water passage 15 by controlling the up and down movement of the flow control plate 20, thereby controlling the water flow of the valve. Both ends of the flow control plate 20 are set as curved surface structures that fit against the inner wall of the central valve body 10.

[0049] Positioning disc 21 is fixed to the bottom of flow control plate 20 and fits with positioning recess 18 with clearance. When positioning disc 21 fits in positioning recess 18, water passage cavity 15 is closed, and water pressure is evenly applied to flow control plate 20. A drive rack 22, meshing with corresponding transmission gear 310, is connected to the periphery of positioning disc 21 via a support rod. The rotation of horizontal transmission component 31 is achieved by the up-and-down movement of drive rack 22 driving synchronous rotation of transmission gear 310.

[0050] A connecting plate 23 is fixed to the top of the flow control plate 20. A valve stem 24, which is threadedly engaged with the central valve body 10, is fixed to the top of the connecting plate 23. The valve stem 24 is driven by a rotating wheel 25. During the process of rotating the valve stem 24 to open the flow control plate 20, the upward movement of the drive rack 22 drives the transmission gear 310 to rotate, thereby realizing the rotary cleaning component 32 to rotate horizontally inside the inlet pipe 11 and outlet pipe 12. This allows the dirt adhering to the inner wall of the inlet pipe 11 and outlet pipe 12 to be scraped off each time the valve is opened, effectively preventing the dirt from remaining for a long time. The dirt is scraped off and discharged under the kinetic energy of the water flow, greatly improving the cleaning efficiency and effect inside the drain valve.

[0051] Example 2

[0052] In this embodiment of the invention, the flow control component 2 includes:

[0053] The flow control plate 20, which is fitted with the sliding hole 110 with a clearance, controls the size of the water inlet of the water passage 15 by controlling the up and down movement of the flow control plate 20, thereby controlling the water flow of the valve. Both ends of the flow control plate 20 are set as curved surface structures that fit against the inner wall of the central valve body 10. Arc-shaped scrapers 26 that fit against the inner wall of the central valve body 10 are fixed on both curved side walls of the flow control plate 20. During the up and down movement of the flow control plate 20, the arc-shaped scrapers 26 can scrape off the dirt adhering to the inner wall of the central valve body 10.

[0054] Positioning disc 21 is fixed to the bottom of flow control plate 20 and fits with positioning recess 18 with clearance. When positioning disc 21 fits in positioning recess 18, water passage cavity 15 is closed, and water pressure is evenly applied to flow control plate 20. A drive rack 22, meshing with corresponding transmission gear 310, is connected to the periphery of positioning disc 21 via a support rod. The rotation of horizontal transmission component 31 is achieved by the up-and-down movement of drive rack 22 driving synchronous rotation of transmission gear 310.

[0055] The connecting plate 23 is fixed to the top of the flow control plate 20. A valve stem 24, which is threadedly engaged with the central valve body 10, is fixed to the top of the connecting plate 23. The valve stem 24 is driven by the rotating wheel 25. During each valve opening process, it can not only clean the inner walls of the valve inlet pipe 11 and outlet pipe 12, but also simultaneously clean the dirt adhering to the inner wall of the central valve body 10 through the up and down movement of the arc-shaped scraper 26. This achieves rapid removal of dirt adhering to the entire inner wall of the drain valve and increases the cleaning effect of the drain valve.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bidirectional self-cleaning linear drain valve for use in wastewater treatment, comprising a drain valve body, wherein the drain valve body includes a central valve body, and an inlet pipe and an outlet pipe are respectively connected to the central valve body, the inlet pipe and the outlet pipe being coaxially arranged; characterized in that: The central valve body is internally connected and fixed with a coaxial partition plate, which divides the central valve body into a closed cavity and a water passage cavity. The water inlet pipe, the water passage cavity and the water outlet pipe constitute a water conveying channel. The central valve body is equipped with a flow control component, which is used to control the opening and closing of the water passage chamber; Both the inlet and outlet pipes are equipped with horizontal cleaning mechanisms, which are engaged with the flow control component. The upward movement of the flow control component drives the horizontal cleaning mechanism to rotate horizontally, thereby cleaning the dirt adhering to the inner walls of the inlet and outlet pipes. The inlet pipe and outlet pipe are each equipped with a fixed frame and a threaded frame, and the fixed frame and the threaded frame are coaxially arranged. The fixing bracket is fixed near the central valve body, and the threaded bracket is fixed away from the central valve body. The horizontal cleaning mechanism includes a horizontal transmission assembly, which includes: A transmission gear, the transmission gear being disposed on the side of the mounting bracket near the flow control assembly; and A horizontal rotating shaft is connected and fixed to the transmission gear, and is rotatably engaged with the fixed frame; a limit rod is connected and fixed to the circumferential side of the horizontal rotating shaft, and the limit rod extends along the length direction of the horizontal rotating shaft; The horizontal cleaning mechanism further includes a rotary cleaning component, which comprises: A hollow connecting tube, wherein the inner wall of the hollow connecting tube is provided with limiting grooves corresponding to the limiting rods, and the limiting rods are slidably disposed along the extending direction of the limiting grooves; the hollow connecting tube is threadedly engaged with a threaded bracket at a corresponding position; and Two rotating scraping structures are provided, each of which is connected and fixed to the outer wall of the hollow connecting tube. Each rotating scraping structure includes a fixing ring coaxially fixed to the outer wall of the hollow connecting tube. Multiple support rods are evenly distributed circumferentially on the outer wall of the fixing ring, and an arc-shaped scraper is connected and fixed to one end of each support rod.

2. The bidirectional self-cleaning linear drain valve for wastewater treatment as described in claim 1, characterized in that, The arc-shaped scraper inside the water inlet pipe is in contact with the inner wall of the water inlet pipe, and the arc-shaped scraper inside the water outlet pipe is in contact with the inner wall of the water outlet pipe; One of the rotary cleaning components is attached to the surface of the corresponding mounting bracket away from the flow control component, and the other rotary cleaning component is attached to the surface of the corresponding threaded bracket away from the flow control component.

3. The bidirectional self-cleaning linear drain valve for wastewater treatment as described in claim 1, characterized in that, A positioning notch is provided at the center of the bottom of the water passage cavity, a sealing channel is provided at the top of the partition plate, and a sliding hole communicating with the water passage cavity is provided at the bottom of the sealing channel. Both ends of the sliding hole are configured as curved surfaces coplanar with the inner wall of the central valve body.

4. A bidirectional self-cleaning linear drain valve for wastewater treatment as described in claim 3, characterized in that, The flow control component includes: The flow control plate is fitted with the sliding hole clearance, and both ends of the flow control plate are set as curved surface structures that fit against the inner wall of the central valve body; A positioning disk is fixedly connected to the bottom of the flow control plate and has a clearance fit with the positioning notch; a drive rack that meshes with a corresponding transmission gear is connected to the peripheral side of the positioning disk via a support rod; and A connecting plate is fixed to the top of the flow control plate, and a valve stem that is threadedly engaged with the central valve body is fixed to the top of the connecting plate. The valve stem is driven by a rotating wheel.

5. A bidirectional self-cleaning linear drain valve for wastewater treatment as described in claim 3, characterized in that, The flow control component includes: The flow control plate is fitted with the sliding hole clearance, and both ends of the flow control plate are set as curved surface structures that fit against the inner wall of the central valve body; an arc-shaped scraper is fixed on both curved side walls of the flow control plate that fits against the inner wall of the central valve body. A positioning disk is fixedly connected to the bottom of the flow control plate and has a clearance fit with the positioning notch; a drive rack that meshes with a corresponding transmission gear is connected to the peripheral side of the positioning disk via a support rod; and A connecting plate is fixed to the top of the flow control plate, and a valve stem that is threadedly engaged with the central valve body is fixed to the top of the connecting plate. The valve stem is driven by a rotating wheel.

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