Valve with filtering function

Abstract

The invention discloses a valve with a filtering function, which relates to the technical field of valves and comprises a valve body, a filter screen assembly and an automatic sewage disposal device. The filter screen assembly is arranged in the valve body and used for filtering impurities in fluid. The automatic sewage disposal device is arranged on one side of the filter screen assembly and used for automatically cleaning impurities on the filter screen assembly, a sewage disposal assembly is further arranged at the bottom of the valve body, and the sewage disposal assembly is used for discharging the impurities cleaned by the filter screen assembly through the automatic sewage disposal device. The filter screen assembly, the automatic sewage disposal device and the sewage disposal assembly are arranged, the filter screen assembly effectively filters fluid impurities, abrasion of the impurities to internal parts of the valve is reduced, and the service life of the valve is prolonged. The automatic cleaning device achieves automatic cleaning of the filter screen, and the manual maintenance cost is reduced. And by arranging the sewage discharging hopper and the sewage discharging valve, impurities can be conveniently discharged in time, normal operation of the valve is guaranteed, and the stability and reliability of the whole fluid conveying system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a valve with filtering function. Background Art

[0002] Valves play a vital control role in various fluid delivery systems. However, existing valves have many problems during use. On the one hand, impurities contained in the fluid are easily accumulated inside the valve, causing the valve core, seals and other parts to wear more severely, shortening the service life of the valve and increasing maintenance costs. On the other hand, when impurities accumulate to a certain extent, it will affect the normal switching action of the valve, causing the valve to be unable to accurately control the flow and direction of the fluid, and even causing pipeline blockage, affecting the normal operation of the entire system. In addition, some existing valves with filtering functions often have complex filtering structures, making it difficult to clean and replace the filter screen, requiring a lot of manpower and time.

[0003] For example, patent CN109667942B discloses a manual valve that is easy to open and close, including a valve body, an inlet, an outlet, a connecting pipe, a first reinforcing rib plate, a fixing ring, a pressure block, a through hole, a tension gas spring, a round tube, a round sleeve, a groove, a plug strip, a pull rod, a top plate, a threaded rod, a nut, a square cylinder, a piston, a limiting guide ring, a pressure rod, a pressure plate, a rubber sealing pad, a second reinforcing rib plate, a compression spring, a fixing rod, a rotating round rod, a handle, a top sleeve, a fixing strip, an interlocking groove, a round block, a round short rod and a through groove. The present invention has a reasonable structure, and can facilitate the connection of the connecting pipes at both ends of the valve body through the installation structure. When disassembling and assembling the connecting pipes, it only needs to take out and put the plug strip and pull the pull rod to complete the operation, which is simple to operate and can save the installation and disassembly time of the valve body; when closing and intercepting or discharging, it is simpler to operate compared with traditional valves and saves the operation time of manual valves.

[0004] The valve of the above technical solution does not have a filtering function, and impurities contained in the fluid are easily accumulated inside the valve, resulting in increased wear of the valve core, seals and other components of the valve, shortening the service life of the valve and increasing maintenance costs. Therefore, it is of great practical significance to develop a valve with efficient filtering function and easy maintenance. Summary of the invention

[0005] The invention provides a valve with a filtering function, which solves the technical problem that the existing valves are easily affected by impurities and are inconvenient to maintain.

[0006] In order to solve the above technical problems, the present invention provides a valve with a filtering function, comprising a valve body, a filter assembly, and an automatic cleaning device; the filter assembly is arranged in the valve body to filter impurities in the fluid; the automatic cleaning device is arranged on one side of the filter assembly to automatically clean impurities on the filter assembly, and a sewage discharge assembly is also arranged at the bottom of the valve body, and the sewage discharge assembly is used for the automatic sewage cleaning device to discharge impurities cleaned by the filter assembly.

[0007] Preferably, the automatic cleaning device further comprises a driving component, a transmission component and a cleaning component; the driving component is used to provide power, the transmission component transmits the power of the driving component to the cleaning component, and the cleaning component cleans the filter assembly.

[0008] The above technical solution is adopted: the automatic cleaning device also includes a driving component, a transmission component and a cleaning component; the driving component is used to provide power, the transmission component transmits the power of the driving component to the cleaning component, and the cleaning component cleans the filter assembly, which can effectively clean the impurities attached to the filter assembly and prevent the filter assembly from being blocked.

[0009] Preferably, the driving component comprises a motor, the motor is detachably arranged on the valve body, and the output end of the motor is fixedly connected to the transmission component.

[0010] The above technical solution is adopted: the driving component includes a motor, the motor is detachably arranged on the valve body, and the output end of the motor is fixedly connected to the transmission component, which is convenient for fixing the motor and also convenient for disassembly for maintenance when the motor is damaged.

[0011] Preferably, the transmission component includes a first rotating rod arranged longitudinally, the first rotating rod partially extending into the interior of the valve body and a first bevel tooth is fixed to the end of the first rotating rod, one end of the first rotating rod away from the first bevel tooth is fixedly connected to the output end of the motor, a second bevel tooth is meshed with the first bevel tooth, one end of the second bevel tooth is fixedly connected to the second rotating rod, the second rotating rod is rotatably arranged on a fixed frame, the fixed frame is fixed inside the valve body, and one end of the second bevel tooth away from the second rotating rod is fixedly connected to the cleaning component.

[0012] The above technical solution is adopted: the transmission component includes a first rotating rod arranged longitudinally, the first rotating rod partially extends into the interior of the valve body and a first bevel tooth is fixed to the end of the first rotating rod, the end of the first rotating rod away from the first bevel tooth is fixedly connected to the output end of the motor, and the second bevel tooth is meshed with the first bevel tooth, one end of the second bevel tooth is fixedly connected to the second rotating rod, the second rotating rod is rotatably arranged on a fixed frame, the fixed frame is fixed inside the valve body, the end of the second bevel tooth away from the second rotating rod is fixedly connected to the cleaning component, the output end of the motor rotates to drive the first rotating rod to rotate, so that the first bevel tooth rotates, thereby driving the second bevel tooth meshed with the first bevel tooth to rotate, the second bevel tooth rotates, so that the cleaning component connected to the second bevel tooth rotates, and the filter assembly is cleaned.

[0013] Preferably, the cleaning component comprises a scraper brush, and the scraper brush contacts the surface of the filter assembly and cleans the filter assembly driven by the transmission component.

[0014] The above technical solution is adopted: the cleaning component includes a scraper brush, the scraper brush contacts the surface of the filter assembly, and the filter assembly is cleaned under the drive of the transmission component. The scraper brush can better clean the impurities on the filter assembly.

[0015] Preferably, the filter assembly includes a filter frame and a filter, the filter is fixed in the filter frame, the valve body is provided with a mounting groove, the filter frame is snap-connected in the mounting groove, and the filter frame is detachably connected to the valve body.

[0016] The above technical solution is adopted: the filter assembly includes a filter frame and a filter, the filter is fixed in the filter frame, the valve body is provided with a mounting groove, the filter frame is clamped in the mounting groove, the filter frame and the valve body are detachably connected, when the filter is damaged, the filter assembly is removed from the valve body to achieve the purpose of replacing the filter, which makes it easier to maintain the blockage inside the valve body.

[0017] Preferably, the filter frame is fixed in the valve body by bolts, a handle is fixed on the top of the filter frame, and a sealing gasket is provided between the filter frame and the valve body.

[0018] The above technical solution is adopted: the filter frame is fixed in the valve body by bolts, a handle is fixed on the top of the filter frame, and a sealing gasket is arranged between the filter frame and the valve body to ensure the sealing between the filter frame and the valve body and prevent fluid leakage.

[0019] Preferably, a protection box is also provided on the transmission component, and the protection box is fixedly connected to the fixing frame.

[0020] The above technical solution is adopted: a protection box is also arranged on the transmission component, the protection box is used to protect the transmission component, and prevent the transmission component from being affected by the accumulation of impurities and unable to work, and the protection box is fixedly connected to the fixing frame, so as to further ensure that the protection box can be stably fixed inside the valve body.

[0021] Preferably, a sealed bearing is sleeved on the first rotating rod, and the sealed bearing is fixed on the valve body.

[0022] The above technical solution is adopted: a sealed bearing is sleeved on the first rotating rod, and the sealed bearing is fixed on the valve body. The sealed bearing further ensures that the first rotating rod can rotate while preventing the fluid in the valve body from leaking out of the valve body, thereby further ensuring the sealing performance of the valve body.

[0023] Preferably, the sewage discharge assembly includes a sewage discharge hopper, which is in the shape of a cone with a larger upper part and a smaller lower part. The sewage discharge hopper is fixed to the bottom of the valve body and is used to discharge impurities cleaned by the filter assembly. A sewage discharge valve is provided at the bottom of the sewage discharge hopper to control the opening and closing of the sewage discharge hopper.

[0024] The above technical solution is adopted: the sewage discharge component includes a sewage discharge bucket, which is in the shape of a cone with a larger top and a smaller bottom. When impurities accumulate on the sewage discharge bucket, due to the effect of gravity, the accumulated impurities are more easily discharged from the conical sewage discharge bucket. The sewage discharge bucket is fixed at the bottom of the valve body to discharge impurities cleaned by the filter assembly. A sewage discharge valve is provided at the bottom of the sewage discharge bucket to control the opening and closing of the sewage discharge bucket.

[0025] Compared with the related art, the present invention has the following beneficial effects: 1. Compared with the traditional valve, the present invention is provided with a filter assembly and an automatic cleaning device. The filter assembly adopts a detachable design, and the filter frame is snap-fitted with the mounting groove of the valve body, which is convenient for installation and replacement. The driving component of the automatic cleaning device drives the transmission component to rotate, so that the transmission component drives the cleaning component to rotate, and the filter is scrubbed and cleaned, which can effectively clean the impurities on the filter. The sewage hopper is arranged at the bottom of the valve body and is equipped with a sewage valve to facilitate the discharge of impurities. Compared with the prior art, the beneficial effects of the present invention are: the filter assembly effectively filters fluid impurities, reduces the wear of impurities on the internal components of the valve, and extends the service life of the valve. The automatic cleaning device realizes automatic cleaning of the filter and reduces the cost of manual maintenance. The detachable filter assembly facilitates the replacement and cleaning of the filter and improves the maintenance efficiency. The setting of the sewage hopper and the sewage valve facilitates the timely discharge of impurities, ensures the normal operation of the valve, and improves the stability and reliability of the entire fluid conveying system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a valve with filtering function; Figure 2It is a partial cross-sectional structural diagram of a valve with filtering function; Figure 3 A schematic diagram of the separation of a filter assembly and a valve body in a valve with filtering function; Figure 4 It is a partial cross-sectional top view of a valve with filtering function; Figure 5 This is an enlarged view of point A of a valve with filtering function; Figure 6 This is a structural diagram of a driving component, a transmission component, a cleaning component and a filter assembly in a valve with a filtering function; Figure 7 It is a structural schematic diagram of a fixing frame and a protective box in a valve with filtering function; Figure 8 It is a schematic diagram of the valve body structure of a valve with filtering function; Fig. 9 It is a schematic diagram of a partial cross-sectional structure of a valve body of a valve with filtering function; Fig.10 for Fig. 9 The enlarged structural diagram at B in FIG.

[0027] Numbers in the figure: 1. valve body; 100. T-shaped tee; 101. blind cover; 102. top screw; 11a. valve core rod; 110. first tooth; 111. annular groove; 12. valve core; 120. second tooth; 2. filter assembly; 21. filter frame; 22. filter; 23. handle; 3. automatic cleaning device; 4. driving part; 41. motor; 5. transmission part; 51. first rotating rod; 52. first bevel tooth; 53. second bevel tooth; 54. second rotating rod; 6. cleaning part; 61. scraper brush; 7. sealing bearing; 8. fixing frame; 9. sewage discharge assembly; 91. sewage discharge bucket; 92. sewage discharge valve; 10. protective box; 11. installation groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] like Figure 1-Figure 6As shown, a valve with a filtering function comprises a valve body 1, a filter assembly 2, and an automatic cleaning device 3; the filter assembly 2 is arranged in the valve body 1, and is used to filter impurities in the fluid; the automatic cleaning device 3 is arranged on one side of the filter assembly 2, and is used to automatically clean the impurities on the filter assembly 2, and a sewage discharge assembly 9 is also arranged at the bottom of the valve body 1, and the sewage discharge assembly 9 is used for the automatic cleaning device 3 to discharge the impurities cleaned by the filter assembly 2; The filter assembly 2 is arranged in the valve body 1, and is used to filter impurities in the fluid; the filter assembly 2 effectively filters the fluid impurities, reduces the wear of the impurities on the internal parts of the valve, and prolongs the service life of the valve. The automatic cleaning device 3 is arranged on one side of the filter assembly 2, and is used to automatically clean the impurities on the filter assembly 2. The automatic cleaning device 3 realizes automatic cleaning of the filter, and reduces the cost of manual maintenance. A sewage discharge assembly 9 is also arranged at the bottom of the valve body 1. The sewage discharge assembly 9 is used for the automatic sewage cleaning device 3 to discharge the impurities cleaned by the filter assembly 2. The arrangement of the sewage discharge bucket 91 and the sewage discharge valve 92 facilitates the timely discharge of impurities, ensures the normal operation of the valve, and improves the stability and reliability of the entire fluid conveying system.

[0031] Embodiment 2

[0032] like Figure 1-Figure 6 As shown, the automatic cleaning device 3 also includes a driving component 4, a transmission component 5 and a cleaning component 6; the driving component 4 is used to provide power, and the transmission component 5 transmits the power of the driving component 4 to the cleaning component 6, and the cleaning component 6 cleans the filter assembly 2, which can effectively clean the impurities attached to the filter assembly 2 and prevent the filter assembly 2 from being blocked; The driving component 4 includes a motor 41, which is detachably arranged on the valve body 1. The detachability of this embodiment is, for example, to fix the bracket of the motor 41 on the valve body 1 by bolts, and to fix the output end of the motor 41 with the transmission component 5, so as to facilitate fixing the motor 41. At the same time, when the motor 41 is damaged, it is also convenient to disassemble it for maintenance; The transmission component 5 includes a first rotating rod 51 arranged longitudinally, the first rotating rod 51 partially extends into the interior of the valve body 1 and a first bevel tooth 52 is fixed to the end of the first rotating rod 51, one end of the first rotating rod 51 away from the first bevel tooth 52 is fixedly connected to the output end of the motor 41, and a second bevel tooth 53 is meshed and connected with the first bevel tooth 52, one end of the second bevel tooth 53 is fixedly connected to a second rotating rod 54, the second rotating rod 54 is rotatably arranged on a fixing frame 8, the fixing frame 8 is fixed to the interior of the valve body 1, one end of the second bevel tooth 53 away from the second rotating rod 54 is fixedly connected to the cleaning component 6, the output end of the motor 41 rotates to drive the first rotating rod 51 to rotate, so that the first bevel tooth 52 rotates, thereby driving the second bevel tooth 53 meshed with the first bevel tooth 52 to rotate, the second bevel tooth 53 rotates, so that the cleaning component 6 connected to the second bevel tooth 53 rotates, and the filter assembly 2 is cleaned; The cleaning component 6 includes a scraper brush 61, which contacts the surface of the filter assembly 2 and cleans the filter assembly 2 under the drive of the transmission component 5. The scraper brush 61 can better clean the impurities on the filter assembly 2; The filter assembly 2 includes a filter frame 21 and a filter 22. The filter 22 is fixed in the filter frame 21. The valve body 1 is provided with a mounting groove 11. The filter frame 21 is clamped in the mounting groove 11. The filter frame 21 is detachably connected to the valve body 1. When the filter 22 is damaged, the filter assembly is removed from the valve body 1 to achieve the purpose of replacing the filter 22, thereby making it easier to maintain the blockage inside the valve body 1. The filter frame 21 is fixed in the valve body 1 by bolts, a handle 23 is fixed on the top of the filter frame 21, and a sealing gasket is arranged between the filter frame 21 and the valve body 1 to ensure the sealing between the filter frame 21 and the valve body 1 and prevent fluid leakage; The first rotating rod 51 is sleeved with a sealing bearing 7, which is fixed on the valve body 1. The sealing bearing 7 further ensures that the first rotating rod 51 can rotate, and can also prevent the fluid in the valve body 1 from leaking out of the valve body 1, further ensuring the sealing performance between the valve body 1 and the transmission component 5; The sewage discharge assembly 9 includes a sewage discharge bucket 91, which is in the shape of a cone column with a larger upper part and a smaller lower part. When impurities accumulate on the sewage discharge bucket 91, due to the effect of gravity, the accumulated impurities are more easily discharged from the conical column-shaped sewage discharge bucket 91. The sewage discharge bucket 91 is fixed at the bottom of the valve body 1, and is used to discharge the impurities cleaned by the filter assembly 2. A sewage discharge valve 92 is provided at the bottom of the sewage discharge bucket 91, which is used to control the opening and closing of the sewage discharge bucket 91.

[0033] Embodiment 3

[0034] like Figure 6 , Figure 7 As shown, a protection box 10 is also provided on the transmission component 5, and the protection box 10 is used to protect the transmission component 5, and prevent the transmission component 5 from being affected by the accumulation of impurities and being unable to work. The protection box 10 is fixedly connected to the fixing frame 8. It is further ensured that the protection box 10 can be stably fixed inside the valve body 1.

[0035] Working principle: Figure 1-Figure 7As shown, in the valve with filtering function of the present invention, the valve body 1 is used as the main body of the whole valve, and a filter assembly 2 and an automatic cleaning device 3 are installed inside. The filter assembly 2 includes a filter frame 21 and a filter 22. The filter 22 is installed in the filter frame 21. The filter frame 21 is adapted to be snap-fitted with the mounting groove 11 on the valve body 1. The detachable connection between the filter frame 21 and the valve body 1 is achieved by snap-fitting. When the filter 22 needs to be replaced or cleaned after being used for a period of time, the filter frame 21 can be easily removed from the valve body 1. It should be noted that the automatic cleaning device 3 can also clean the filter screen 22 and remove impurities. The output end of the motor 41 drives the first rotating rod 51 to rotate, so that the first bevel gear 52 rotates, thereby driving the second bevel gear 53 engaged with the first bevel gear 52 to rotate. The second bevel gear 53 rotates, so that the cleaning component 6 connected to the second bevel gear 53 rotates, and the filter assembly 2 is cleaned, thereby removing impurities on the filter screen 22. A sewage hopper 91 is provided at the bottom of the valve body 1, and a sewage valve 92 is provided at the bottom of the sewage hopper 91. When the automatic cleaning device 3 cleans the filter screen 22, impurities will fall to the bottom of the valve body 1. At this time, the sewage valve 92 is opened, and the impurities can be discharged from the valve through the sewage hopper 91.

[0036] For example, in an industrial water delivery system, a valve with a filtering function of the present invention is installed. When water flows through the valve, the filter assembly 2 filters impurities in the water. As time goes by, after a certain amount of impurities accumulate on the filter, the automatic cleaning device 3 is started to clean the filter 22. The cleaned impurities are discharged through the sewage hopper 91. If the filter 22 needs to be replaced after a long period of use, the filter assembly 2 can be quickly disassembled for replacement to ensure continuous and efficient operation of the valve.

[0037] Embodiment 4

[0038] like Figure 8-Figure 10 As shown, this embodiment further describes the valve body 1 in the embodiment, the valve body 1 includes a T-shaped tee 100, and a valve core rod 11a rotatably connected to one of the passages of the T-shaped tee 100, at least a portion of the valve core rod 11a is inserted into the tee intersection of the T-shaped tee 100, and a valve core 12 located at the tee intersection is provided at one axial end of the valve core rod 11a.

[0039] In this embodiment, a plurality of first teeth 110 distributed in a cone shape are provided at one end of the valve core rod 11a, a blind hole for inserting the valve core rod is provided on the outer periphery of the valve core 12, and a plurality of second teeth 120 distributed in a cone shape are provided at the bottom of the blind hole for inserting the valve core rod, and the first teeth 110 and the second teeth 120 mesh with each other to achieve the purpose of circumferential mutual locking, and the notice can at least limit the axial downward movement of the valve core rod 11a.

[0040] Secondly, an annular groove 111 is also provided on the outer periphery of the valve core rod 11a, and a cover 101 is fixed on the convex shoulder of the T-shaped tee 100, and the cover 101 and the convex shoulder are fixed by a plurality of bolts. At the same time, a plurality of abutting screws 102 with inner ends extending into the annular groove 111 are penetrated in the radial direction of the cover 101, so that the axial direction of the valve core rod 11a will not move upward, and play the function of axial limit. A bearing is provided in the annular groove 111, and the abutting screw 102 abuts against the outer ring of the bearing, so that the valve core rod 11a can rotate.

[0041] Of course, there are a rotating bearing and a sealing ring between the cover 101 and the boss.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve with filtering function, characterized in that: The invention comprises a valve body (1), a filter assembly (2), and an automatic cleaning device (3); the filter assembly (2) is arranged in the valve body (1) and is used to filter impurities in the fluid; the automatic cleaning device (3) is arranged on one side of the filter assembly (2) and is used to automatically clean impurities on the filter assembly (2); a sewage discharge assembly (9) is also arranged at the bottom of the valve body (1), and the sewage discharge assembly (9) is used by the automatic cleaning device (3) to discharge impurities cleaned by the filter assembly (2).

2. A valve with filtering function according to claim 1, characterized in that: The automatic dirt cleaning device (3) further comprises a driving component (4), a transmission component (5) and a cleaning component (6); the driving component (4) is used to provide power, the transmission component (5) transmits the power of the driving component (4) to the cleaning component (6), and the cleaning component (6) cleans the filter assembly (2).

3. A valve with filtering function according to claim 2, characterized in that: The driving component (4) comprises a motor (41), the motor (41) is detachably arranged on the valve body (1), and the output end of the motor (41) is fixedly connected to the transmission component (5).

4. A valve with filtering function according to claim 2, characterized in that: The transmission component (5) comprises a first rotating rod (51) arranged longitudinally, the first rotating rod (51) partially extending into the interior of the valve body (1) and a first bevel tooth (52) being fixed at the end of the first rotating rod (51), one end of the first rotating rod (51) away from the first bevel tooth (52) being fixedly connected to the output end of the motor (41), a second bevel tooth (53) being meshed and connected with the first bevel tooth (52), one end of the second bevel tooth (53) being fixedly connected to a second rotating rod (54), the second rotating rod (54) being rotatably arranged on a fixing frame (8), the fixing frame (8) being fixed to the inner wall of the valve body (1), and one end of the second bevel tooth (53) away from the second rotating rod (54) being fixedly connected to the cleaning component (6).

5. A valve with filtering function according to claim 2, characterized in that: The cleaning component (6) comprises a scraper brush (61), and the scraper brush (61) contacts the surface of the filter assembly (2) and cleans the filter assembly (2) under the drive of the transmission component (5).

6. A valve with filtering function according to claim 1, characterized in that: The filter assembly (2) comprises a filter frame (21) and a filter (22); the filter (22) is fixed in the filter frame (21); a mounting groove (11) is provided on the valve body (1); the filter frame (21) is snap-fitted into the mounting groove (11); and the filter frame (21) is detachably connected to the valve body (1).

7. A valve with filtering function according to claim 6, characterized in that: The filter frame (21) is fixed in the valve body (1) by means of bolts, a handle (23) is fixed on the top of the filter frame (21), and a sealing gasket is provided between the filter frame (21) and the valve body (1).

8. The valve with filtering function according to claim 2, characterized in that: A protection box (10) is also provided on the transmission component (5), and the protection box (10) is fixedly connected to the fixing frame (8).

9. The valve with filtering function according to claim 4, characterized in that: A sealing bearing (7) is sleeved on the first rotating rod (51), and the sealing bearing (7) is fixed on the valve body (1).

10. The valve with filtering function according to claim 1, characterized in that: The sewage discharge assembly (9) comprises a sewage discharge hopper (91), which is in the shape of a cone column with a larger upper portion and a smaller lower portion. The sewage discharge hopper (91) is fixed to the bottom of the valve body (1) and is used to discharge impurities cleaned by the filter assembly (2). A sewage discharge valve (92) is provided at the bottom of the sewage discharge hopper (91) and is used to control the opening and closing of the sewage discharge hopper (91).

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