A valve with self-cleaning function

Abstract

The utility model relates to a valve with self -cleaning function, including valve seat, valve plate and operating lever and operating handle, and the middle part of valve plate peripheral side is provided with self -cleaning subassembly, and self -cleaning subassembly is linked with operating lever, and operating lever includes inner rod and outer rod, and inner rod upper end is linked with operating handle, and the lower extreme of inner rod is linked with self -cleaning subassembly, and the upper end of outer rod is rotatably linked with valve plate, and the lower extreme of outer rod is linked with valve plate, and rotatably link through planetary gear set between inner rod and outer rod, and inner rod is driven to rotate by operating handle, and outer rod and valve plate are driven to rotate along with inner rod by planetary gear set, when valve plate rotates relative to valve seat, self -cleaning subassembly can rotate along with valve plate, and self -cleaning subassembly can move along the outer periphery of valve plate along the direction perpendicular to the rotation direction of valve plate. The utility model relates to a valve with self -cleaning function, through a series of innovative design, has realized efficient cleaning, stable operation, convenient operation and good sealing and multiple technical effects.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to a valve with a self-cleaning function. Background Technology

[0002] In modern industrial production, valves, as core components of fluid control systems, directly affect the stability and safety of the entire production process. However, traditional valves often face the problem of impurities and particulate matter accumulating in the medium during long-term operation. These deposits not only reduce the valve's sealing performance but also increase wear and failure rates, thus affecting the normal operation of the system. Especially in industries such as petroleum, chemical, pharmaceutical, and food, the complexity of the media (such as high viscosity, high corrosiveness, and the presence of solid particles) makes valve cleaning and maintenance even more difficult.

[0003] To address this issue, several self-cleaning valve designs have emerged in the market. These designs primarily achieve cleaning through simple water flushing, mechanical scrapers, or rotating components. However, these existing technologies have significant limitations. For example, water flushing is ineffective with highly viscous media, while mechanical scrapers and rotating components can lead to increased manufacturing costs and maintenance difficulties due to their complex structures. Furthermore, the cleaning effect of existing self-cleaning valves is often insufficient, failing to thoroughly remove impurities from the valve plate surface, especially when the media contains fine particles or highly viscous substances, resulting in low cleaning efficiency.

[0004] More importantly, the design of existing self-cleaning valves fails to adequately consider the balance between cleaning function and valve sealing performance. During the cleaning process, the movement of the cleaning components may interfere with the sealing structure, leading to a decrease in sealing performance. For example, some self-cleaning valves require opening during cleaning, which not only increases the risk of media leakage but may also allow impurities to enter the valve, further affecting its normal operation. Furthermore, the design of existing self-cleaning valves lacks flexibility and cannot be adjusted according to different media characteristics and operating conditions, limiting their application in various complex operating environments. Utility Model Content

[0005] The purpose of this invention is to provide a valve with a self-cleaning function, which facilitates efficient cleaning of the valve and improves its performance and service life.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a valve with a self-cleaning function, comprising: a valve seat, a valve plate rotatably disposed in the valve seat, an operating rod for driving the valve plate to rotate, and an operating handle disposed at the end of the operating rod;

[0007] A self-cleaning component is provided in the middle of the outer periphery of the valve plate that contacts the valve seat, and the self-cleaning component is connected to the operating lever;

[0008] The operating lever includes an inner lever and an outer lever. The upper end of the inner lever is connected to the operating handle and can be driven to rotate by the operating handle. The lower end of the inner lever is connected to the self-cleaning component. The outer lever is sleeved outside the inner lever. The upper end of the outer lever is rotatably connected to the valve plate. The lower end of the outer lever is connected to the valve plate. The inner lever and the outer lever are rotatably connected through a planetary gear set.

[0009] The inner rod is driven to rotate by the operating handle, and the outer rod and the valve plate are driven to rotate with the inner rod by the planetary gear set. When the valve plate rotates relative to the valve seat, the self-cleaning component can rotate with the valve plate, and the self-cleaning component can move along the outer periphery of the valve plate perpendicular to the rotation direction of the valve plate.

[0010] Furthermore, the valve plate includes a plate body and a connecting pipe. The connecting pipe is disposed in the middle of the plate body and is hollow inside. The inner rod passes through the connecting pipe and is connected to the valve seat. The outer rod is connected to the connecting pipe. The self-cleaning component is slidably wrapped around the plate body. The plate body has a first groove for accommodating the self-cleaning component. The self-cleaning component is slidably connected to the inner rod.

[0011] Furthermore, the self-cleaning component includes two sets of transmission chains symmetrically surrounding the plate body and the connecting pipe, and a slider disposed on the transmission chains. The inner rod is provided with a spiral second groove corresponding to the slider. When the inner rod rotates, the slider slides in the second groove to drive the transmission chains to slide around the plate body.

[0012] Furthermore, each of the aforementioned transmission chains includes a smooth surface portion and a concave-convex surface portion. The transmission chain slidably disposed inside the connecting tube is the smooth surface portion, and the transmission chain surrounding the outer periphery of the plate body is the concave-convex surface portion. Brush bristles are evenly disposed in the grooves of the concave-convex surface portion, and the height of the brush bristles is higher than that of the protruding structure. The slider is disposed in the middle of the smooth surface portion.

[0013] Furthermore, the planetary gear set includes a sun gear connected to the inner rod, planet gears connected to the valve seat, and a ring gear connected to the outer rod. The planet gears are disposed between the sun gear and the ring gear and mesh with the sun gear and the ring gear respectively.

[0014] Furthermore, the operating handle is provided with a limiting part for restricting the rotation of the operating lever.

[0015] Furthermore, the limiting part includes a toothed gear disposed at the end of the operating handle, a limiting handle, and springs at both ends respectively connected to the operating handle and the limiting handle;

[0016] The operating handle is rotatably connected to the toothed gear, the toothed gear is connected to the inner rod, and the toothed gear can rotate relative to the valve seat. The end of the limiting handle is provided with a limiting block for cooperating with the toothed gear.

[0017] Furthermore, the valve seat includes a base, a valve body, and a support rod connected sequentially from bottom to top. A valve cavity is formed inside the valve body, and the valve is rotatably disposed inside the valve cavity. The operating rod passes through the support rod and extends downward from the top of the support rod to the base. The top of the support rod is provided with a support end for supporting the operating handle.

[0018] Furthermore, a sealing ring is provided between the valve body and the valve plate.

[0019] The beneficial effects of the valve with self-cleaning function provided by this utility model are as follows:

[0020] Compared with existing technologies, this utility model presents a self-cleaning valve that achieves multiple technical benefits, including high-efficiency cleaning, stable operation, convenient operation, and excellent sealing, through a series of innovative designs, significantly improving valve performance and service life. This solution cleverly combines the self-cleaning function with the valve's opening and closing operation. Utilizing a transmission chain and brush-like self-cleaning components, impurities on the valve plate surface are automatically removed during each opening and closing process, effectively preventing the impact of impurity accumulation on valve performance. It also adapts to the cleaning needs of various complex media, ensuring effective cleaning. The optimized valve seat structure and sealing ring design enhance the valve's sealing performance, reduce the risk of media leakage, and extend the valve's service life. Furthermore, the integrated operation design and flexible limit control make operation more convenient and safer. The precise transmission control of the planetary gear set and the compact structural layout further improve the valve's operational stability and adaptability. This design not only reduces maintenance costs but also improves equipment operating efficiency, providing a more efficient, reliable, and economical solution for industrial fluid control systems. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of a valve with self-cleaning function provided for an embodiment of this utility model;

[0023] Figure 2 A schematic diagram of the internal structure of a valve with self-cleaning function provided in an embodiment of this utility model;

[0024] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0025] Figure 4 A schematic diagram of the valve seat provided in an embodiment of this utility model;

[0026] Figure 5 A partial structural assembly drawing of the outer rod and valve provided for an embodiment of this utility model;

[0027] Figure 6 A schematic diagram showing a partial connection between the inner rod and the operating handle provided for an embodiment of this utility model;

[0028] Figure 7 A schematic diagram of the structure of the operating handle provided in an embodiment of this utility model;

[0029] Figure 8 This is a schematic diagram of the sealing ring provided in an embodiment of the present invention.

[0030] In the diagram: 1. Valve seat; 11. Base; 12. Valve body; 13. Support rod; 131. Support end; 2. Valve plate; 21. Plate body; 211. First slide groove; 22. Connecting pipe; 3. Operating rod; 31. Inner rod; 311. Second slide groove; 32. Outer rod; 33. Planetary gear set; 331. Sun gear; 332. Planetary gears; 333. Gear ring; 4. Operating handle; 5. Self-cleaning component; 51. Transmission chain; 511. Smooth surface part; 512. Concave and convex surface part; 52. Slider; 6. Limiting part; 61. Gear with missing tooth; 62. Limiting handle; 621. Limiting block; 63. Spring; 7. Sealing ring. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this embodiment clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this embodiment and are not intended to limit this embodiment.

[0032] Please refer to the following: Figures 1 to 8The following describes a valve with a self-cleaning function provided in this embodiment. The valve with a self-cleaning function in this embodiment includes a valve seat 1, a valve plate 2 rotatably disposed within the valve seat 1, an operating rod 3 that drives the valve plate 2 to rotate, and an operating handle 4 disposed at the end of the operating rod 3.

[0033] A self-cleaning component 5 is provided in the middle of the outer periphery of the valve plate 2 that contacts the valve seat 1, and the self-cleaning component 5 is connected to the operating lever 3.

[0034] In addition, the operating lever 3 includes an inner lever 31 and an outer lever 32. The upper end of the inner lever 31 is connected to the operating handle 4 and can be driven to rotate by the operating handle 4. The lower end of the inner lever 31 is connected to the self-cleaning component 5. The outer lever 32 is sleeved outside the inner lever 31. The upper end of the outer lever 32 is rotatably connected to the valve plate 2, and the lower end of the outer lever 32 is connected to the valve plate 2. The inner lever 31 and the outer lever 32 are rotatably connected through a planetary gear set 33.

[0035] When the inner rod 31 is driven to rotate by the operating handle 4, the outer rod 32 and the valve plate 2 are driven to rotate with the inner rod 31 by the planetary gear set 33. When the valve plate 2 rotates relative to the valve seat 1, the self-cleaning component 5 can rotate with the valve plate 2, and the self-cleaning component 5 can move along the outer periphery of the valve plate 2 perpendicular to the rotation direction of the valve plate 2. This achieves automatic cleaning of the contact area between the valve plate 2 and the valve seat 1. This design not only effectively removes impurities adhering to the surface of the valve plate 2, reducing the impact of impurity accumulation on valve performance, but also improves the valve's sealing performance and service life. At the same time, the integrated operation design allows the valve opening and closing and self-cleaning actions to be completed through the operating handle 4, greatly improving work efficiency.

[0036] Based on the overall description of the above structure, an exemplary structure of a valve with a self-cleaning function in this embodiment is as follows: Figures 1 to 4 As shown. The valve in this embodiment is a type of butterfly valve, wherein the structure of the valve seat 1 can be referred to Figure 4 As shown, the valve seat 1 includes a base 11, a valve body 12, and a support rod 13 connected sequentially from bottom to top. A valve cavity is formed inside the valve body 12, and a valve plate 2 is rotatably disposed inside the valve cavity. An operating rod 3 passes through the support rod 13 and extends downward from the top of the support rod 13 to the base 11. The top of the support rod 13 is provided with a support end 131 for supporting the operating handle 4.

[0037] This structural design makes the overall valve structure more stable and reliable, improving its load-bearing capacity and pressure resistance. The operating lever 3 passes through the support rod 13 and extends downwards from the top of the support rod 13 to the base 11. This layout not only saves space but also makes the movement of the operating lever 3 smoother, reducing valve malfunctions caused by lever swaying. Furthermore, the support end 131 at the top of the support rod 13 provides stable support for the operating handle 4, improving operational comfort and stability, and allowing operators greater ease and freedom of movement.

[0038] In this embodiment, the valve plate 2 is disposed inside the valve cavity, and refers to... Figure 2 and Figure 5 As shown, the valve plate 2 includes a plate body 21 and a connecting pipe 22. The connecting pipe 22 is located in the middle of the plate body 21 and is hollow inside. The inner rod 31 of the operating lever 3 passes through the connecting pipe 22 and is connected to the base 11. The outer rod 32 passes through the support rod 13 and enters the valve cavity, and is connected to the top of the connecting pipe 22, so as to drive the entire valve plate 2 to rotate through the connecting pipe 22.

[0039] In this embodiment, a sealing ring 7 is provided between the valve body 12 and the valve plate 2. Specifically, as shown... Figure 8 As shown, a rubber sealing ring 7 is provided between the inner wall of the valve cavity formed by the valve body 12 and the valve plate 2. This design significantly enhances the sealing performance of the valve. The sealing ring 7 effectively prevents leakage of the fluid medium, ensuring the reliability and safety of the valve during use. The good sealing performance not only reduces the corrosion and wear of the medium on the valve plate 2 and valve seat 1, thereby extending the service life of the valve, but also reduces maintenance costs.

[0040] In this embodiment, the self-cleaning component 5 is slidably wrapped around the plate body 21. The plate body 21 is provided with a first groove 211 for accommodating the self-cleaning component 5. This structure not only improves the stability of the self-cleaning component 5, making it more stable during movement and avoiding problems such as poor cleaning effect or component damage caused by unstable movement, but also provides a larger range of movement for the self-cleaning component 5 through the first groove 211, enabling it to clean the outer periphery of the valve plate 2 more comprehensively, further enhancing the cleaning effect.

[0041] In addition, the self-cleaning component 5 is also slidably connected to the inner rod 31, so that while the inner rod 31 rotates, the self-cleaning component 5 can slide around the plate body 21.

[0042] As a specific preferred implementation method, such as Figure 5 and Figure 6As shown, the self-cleaning assembly 5 includes two sets of transmission chains 51 symmetrically surrounding the plate body 21 and the connecting pipe 22, and sliders 52 disposed on the transmission chains 51. A spiral second groove 311 is provided on the inner rod 31 corresponding to the slider 52. When the inner rod 31 rotates, the slider 52 slides within the second groove 311, thereby driving the transmission chains 51 to slide around the plate body 21. This precisely controls the movement trajectory of the self-cleaning assembly 5, enabling it to clean the surface of the valve plate 2 evenly. This transmission method not only improves cleaning efficiency and avoids cleaning dead zones, but also makes the entire self-cleaning assembly 5 compact, enabling complex movements within a limited space and saving installation space.

[0043] Still refer to Figure 5 As shown, each transmission chain 51 includes a smooth surface portion 511 and a concave-convex surface portion 512. The transmission chain 51 slidably disposed inside the connecting tube 22 is the smooth surface portion 511, and the transmission chain 51 surrounding the outer periphery of the plate body 21 is the concave-convex surface portion 512. Brush bristles are evenly disposed in the groove of the concave-convex surface portion 512, and the height of the brush bristles is higher than the protrusion structure. A slider 52 is disposed in the middle of the smooth surface portion 511.

[0044] The drive chain 51 is divided into a smooth surface portion 511 and a concave-convex surface portion 512. This ingenious segmented design allows the drive chain 51 to better adapt to the cleaning needs of the valve plate 2 surface. The smooth surface portion 511 is located inside the connecting tube 22, ensuring smooth sliding of the drive chain 51 within the internal space. The concave-convex surface portion 512 surrounds the outer periphery of the valve plate 2, and the bristles evenly arranged in its grooves can penetrate deep into the tiny crevices on the surface of the valve plate 2, effectively removing impurities adhering to the valve plate 2. It has a stronger cleaning ability, especially for some fine particles and sticky substances.

[0045] Secondly, the design of the bristles (not shown in the figure) being higher than the raised structure ensures that the bristles can contact the surface of valve plate 2 first during cleaning, thus avoiding wear that may be caused by direct friction between the raised structure and the surface of valve plate 2. This is crucial for protecting the integrity of the valve plate 2 surface, helping to extend the service life of valve plate 2, and also helping to maintain the valve's sealing performance; in addition, the bristles are made of a soft material that can be bent, avoiding scratches during cleaning.

[0046] Furthermore, in this embodiment, the height of the protruding structure is lower than the depth of the chute. This design helps prevent fluid from entering the chute during the rotation of the valve plate 2's main body 21. Because the height of the protruding structure is lower than the depth of the chute, the edge of the chute forms a relatively high "barrier," effectively preventing fluid from entering the chute. This design is similar to setting up a small protective barrier around the chute, reducing the possibility of fluid entering the chute due to pressure or flow inertia.

[0047] The chute typically contains a slider 52 or other transmission components, the proper functioning of which is crucial for the self-cleaning function. By ensuring that fluid media cannot easily enter the chute, the transmission components within the chute can be effectively protected from fluid corrosion and wear from impurities, extending their service life and ensuring the long-term stable operation of the self-cleaning function.

[0048] Furthermore, the slider 52 located in the middle of the smooth surface portion 511 cooperates with the spiral second groove 311 on the inner rod 31, making the movement of the transmission chain 51 more stable and precise. This structural design not only improves transmission efficiency but also ensures the stability of the self-cleaning component 5 during movement, avoiding problems such as poor cleaning effect or component damage caused by unstable movement.

[0049] In this embodiment, to facilitate both the rotation of the self-cleaning component 5 with the valve plate 2 and its sliding relative to the valve plate 2, the inner rod 31 and the outer rod 32 need to move simultaneously with a certain speed difference. Therefore, in this embodiment, the inner rod 31 and the outer rod 32 are connected by a planetary gear set 33. Specifically, as shown... Figure 2 and Figure 3 As shown, the planetary gear set 33 includes a sun gear 331 connected to the inner rod 31, planet gears 332 connected to the support end 131 on the valve seat 1, and a gear ring 333 connected to the outer rod 32. The planet gears 332 are positioned between the sun gear 331 and the gear ring 333, and mesh with both the sun gear 331 and the gear ring 333. The meshing relationship between the sun gear 331, planet gears 332, and gear ring 333 ensures that the rotation of the inner rod 31 accurately drives the rotation of the outer rod 32 and the valve plate 2, guaranteeing the motion coordination between the self-cleaning component 5 and the valve plate 2.

[0050] Meanwhile, due to the inherent characteristics of the planetary gear set 33, it not only has high transmission efficiency, but also efficiently transmits the power of the operating handle 4 to the valve plate 2 and the self-cleaning component 5, reducing energy loss and improving the overall operating efficiency of the valve. It also increases the stability of the transmission, reduces vibration and noise caused by unstable transmission, and improves the operational stability of the valve.

[0051] In addition, in this embodiment, a limiting part 6 is provided on the operating handle 4 to restrict the rotation of the operating lever 3. The limiting part 6 can restrict the rotation of the operating lever 3 and prevent excessive rotation of the operating lever 3 from causing damage to the valve or failure of the self-cleaning component 5. Through the limiting part 6, the opening and closing position of the valve and the working state of the self-cleaning component 5 can be precisely controlled, avoiding problems such as poor valve sealing or incomplete cleaning caused by improper operation.

[0052] As a specific preferred implementation method, refer to Figure 7As shown, the limiting part 6 includes a toothed gear 61 disposed at the end of the operating handle 4, a limiting handle 62, and a spring 63 that connects the operating handle 4 and the limiting handle 62 at both ends respectively.

[0053] The operating handle 4 is rotatably connected to the toothed gear 61, the toothed gear 61 is connected to the inner rod 31, and the toothed gear 61 can rotate relative to the valve seat 1. The end of the limiting handle 62 is provided with a limiting block 621 for cooperating with the toothed gear 61.

[0054] Operators can manually operate the limit handle 62 to restrict or release the rotation of the operating lever 3, making operation convenient and flexible. The design of the spring 63 gives the limit handle 62 an automatic reset function. When the operator releases the limit handle 62, the spring 63 can automatically return it to its initial position, ensuring the stability and reliability of the limit function. This limit part 6 design not only improves the safety and reliability of operation, but also improves the convenience of operation, allowing operators to more easily control the opening and closing of the valve and its self-cleaning action.

[0055] When the operating handle 4 is rotated, the inner rod 31 rotates accordingly. The inner rod 31 drives the slider 52 to slide along the spiral second slide groove 311. The movement of the slider 52 in turn drives the transmission chain 51 to slide around the body 21 of the valve plate 2. The smooth surface 511 of the transmission chain 51 slides smoothly in the connecting tube 22, while the bristles of the concave-convex surface 512 are closely attached to the outer peripheral surface of the valve plate 2. As the transmission chain 51 slides, the bristles clean the surface of the valve plate 2 from all directions, effectively removing attached impurities. At the same time, the sun gear 331 in the planetary gear set 33 is connected to the inner rod 31 and rotates with it. The planet gear 332 meshes between the sun gear 331 and the gear ring 333, driving the outer rod 32 to rotate. The rotation of the outer rod 32 causes the valve plate 2 to rotate relative to the valve seat 1, realizing the opening and closing operation of the valve. Throughout the process, the limiting part 6 can limit the rotation angle of the operating lever 3, ensuring that the valve and the self-cleaning component 5 operate accurately within a predetermined range, while the sealing ring 7 always ensures the sealing performance between the valve body 12 and the valve plate 2, preventing fluid medium leakage.

[0056] The above description is only a preferred embodiment of this embodiment and is not intended to limit this embodiment. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this embodiment should be included within the protection scope of this embodiment.

Claims

1. A valve with a self-cleaning function, characterized in that, It includes a valve seat (1), a valve plate (2) rotatably disposed in the valve seat (1), an operating rod (3) for driving the valve plate (2) to rotate, and an operating handle (4) disposed at the end of the operating rod (3). A self-cleaning component (5) is provided in the middle of the outer periphery of the valve plate (2) that contacts the valve seat (1), and the self-cleaning component (5) is connected to the operating lever (3). The operating lever (3) includes an inner lever (31) and an outer lever (32). The upper end of the inner lever (31) is connected to the operating handle (4) and can be driven to rotate by the operating handle (4). The lower end of the inner lever (31) is connected to the self-cleaning component (5). The outer lever (32) is sleeved outside the inner lever (31). The upper end of the outer lever (32) is rotatably connected to the valve plate (2). The lower end of the outer lever (32) is connected to the valve plate (2). The inner lever (31) and the outer lever (32) are rotatably connected through a planetary gear set (33). The inner rod (31) is driven to rotate by the operating handle (4), and the outer rod (32) and the valve plate (2) are driven to rotate with the inner rod (31) by the planetary gear set (33). When the valve plate (2) rotates relative to the valve seat (1), the self-cleaning component (5) can rotate with the valve plate (2), and the self-cleaning component (5) can move along the outer periphery of the valve plate (2) perpendicular to the rotation direction of the valve plate (2).

2. A valve with self-cleaning function according to claim 1, characterized in that, The valve plate (2) includes a plate body (21) and a connecting pipe (22). The connecting pipe (22) is located in the middle of the plate body (21) and is hollow inside. The inner rod (31) passes through the connecting pipe (22) and is connected to the valve seat (1). The outer rod (32) is connected to the connecting pipe (22). The self-cleaning component (5) is slidably wrapped around the plate body (21). The plate body (21) has a first groove (211) for accommodating the self-cleaning component (5). The self-cleaning component (5) is slidably connected to the inner rod (31).

3. A valve with self-cleaning function according to claim 2, characterized in that, The self-cleaning component (5) includes two sets of transmission chains (51) symmetrically surrounding the plate body (21) and the connecting pipe (22), and a slider (52) disposed on the transmission chain (51). The inner rod (31) is provided with a spiral second groove (311) corresponding to the slider (52). When the inner rod (31) rotates, the slider (52) slides in the second groove (311) to drive the transmission chain (51) to slide around the plate body (21).

4. A valve with self-cleaning function according to claim 3, characterized in that, Each of the aforementioned transmission chains (51) includes a smooth surface portion (511) and a concave-convex surface portion (512). The transmission chain (51) slidably disposed inside the connecting tube (22) is the smooth surface portion (511), and the transmission chain (51) surrounding the outer periphery of the plate body (21) is the concave-convex surface portion (512). Brush bristles are evenly disposed in the groove of the concave-convex surface portion (512), and the height of the brush bristles is higher than the protrusion structure. The slider (52) is disposed in the middle of the smooth surface portion (511).

5. A valve with self-cleaning function according to claim 1, characterized in that, The planetary gear set (33) includes a sun gear (331) connected to the inner rod (31), a planet gear (332) connected to the valve seat (1), and a gear ring (333) connected to the outer rod (32). The planet gear (332) is disposed between the sun gear (331) and the gear ring (333) and meshes with the sun gear (331) and the gear ring (333) respectively.

6. A valve with self-cleaning function according to claim 1, characterized in that, The operating handle (4) is provided with a limiting part (6) for limiting the rotation of the operating lever (3).

7. A valve with self-cleaning function according to claim 6, characterized in that, The limiting part (6) includes a toothed gear (61) disposed at the end of the operating handle (4), a limiting handle (62), and a spring (63) that connects the operating handle (4) and the limiting handle (62) at both ends respectively. The operating handle (4) is rotatably connected to the toothed gear (61), the toothed gear (61) is connected to the inner rod (31), and the toothed gear (61) can rotate relative to the valve seat (1). The end of the limiting handle (62) is provided with a limiting block (621) for cooperating with the toothed gear (61).

8. A valve with a self-cleaning function according to any one of claims 1 to 7, characterized in that, The valve seat (1) includes a base (11), a valve body (12) and a support rod (13) connected sequentially from bottom to top. A valve cavity is formed inside the valve body (12). The valve is rotatably disposed in the valve cavity. The operating rod (3) passes through the support rod (13) and extends downward from the top of the support rod (13) to the base (11). The top of the support rod (13) is provided with a support end (131) for supporting the operating handle (4).

9. A valve with self-cleaning function according to claim 8, characterized in that, A sealing ring (7) is provided between the valve body (12) and the valve plate (2).

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