A backwashing device for filter material

Abstract

The present invention belongs to the technical field of filter materials, and discloses a backwashing device for filter materials, including a shell, a drain pipe is installed on the outside of the shell, and also includes: a flow guide component, the flow guide component is arranged in the shell; a guide component, the guide component is fixed to the inner wall of the shell. The present invention forms a cylinder by rotating four arc-shaped plates. During the rotation, the through groove is in a closed state, the second fixed plate and the first fixed plate form a cavity, and the circular hole is in an open state, and is discharged through the gap between the first fixed plate and the second fixed plate. The cylinder is formed by four arc-shaped plates, and water cannot be discharged through the drain pipe. The flow rate of water is increased through the gap between the first fixed plate and the second fixed plate, and the surface of the filter cartridge is impacted to achieve the purpose of backwashing. In this process, the effect of backwashing of the filter cartridge is improved, while the equipment for backwashing is reduced, and the cost of backwashing of the filter material is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of filter materials, in particular to a backwashing device for filter materials. Background Art

[0002] Filter materials are materials used to filter and purify water during water treatment, and are widely used in the treatment of domestic sewage, industrial sewage, pure water, and drinking water. Filter materials are mainly divided into two categories: granular materials and physically separated filter media, of which the physically separated filter media mainly include filter cloth, filter cartridges, filter elements, filter paper, and the latest membranes (such as RO membranes). This type of material physically separates impurities from water; the backwashing system of filter materials is a cleaning mechanism widely used in filtration equipment, mainly used to remove dust and residues on the surface or inside of the filter material to ensure the continuous filtering effect of the filter material and the normal operation of the equipment. At present, filter material backwashing usually consists of a backwashing device, a high-pressure gas source or water source, a control system and a dust exhaust system. High-pressure gas or liquid is reversely sprayed onto the surface or inside of the filter material through a backwashing device (such as a backwashing valve, a backwashing nozzle, etc.), and the impact force of the airflow or water flow is used to peel off and discharge the accumulated dust, residues, etc. from the filter material. However, the existing filter material backwashing requires the cooperation of multiple devices, which greatly increases the production cost of the filter material backwashing equipment, and further increases the cost of subsequent maintenance and repair of the equipment. Therefore, a filter material backwashing device is proposed. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a backwashing device for filter material, which solves the problem that the existing backwashing of filter material requires the cooperation of multiple devices to achieve backwashing, which greatly increases the production and maintenance costs of the filter material backwashing equipment.

[0004] To achieve the above object, the present invention provides the following technical solution: a backwashing device for filter material, comprising a shell, a drain pipe is installed outside the shell, and further comprising;

[0005] A flow guide component, wherein the flow guide component is disposed in the shell;

[0006] A guide assembly, wherein the guide assembly is fixedly mounted on the inner wall of the shell;

[0007] A transmission assembly, the transmission assembly is installed inside the shell and connected to the bottom of the guide assembly, and a driving motor is installed outside the shell and drives the transmission assembly through a belt;

[0008] The flow guide assembly includes a stabilizing plate movably sleeved inside the shell, a through hole is provided on the stabilizing plate, a second connecting frame is movably installed in the middle of the stabilizing plate, a filter cartridge is fixedly installed at the bottom of the second connecting frame, and a through groove is provided on the outside of the second connecting frame;

[0009] The transmission assembly is provided with a movable plate on the movable sleeve, the bottom of the filter cartridge contacts the top of the movable plate, the top of the movable plate is fixed with a first fixed plate, four arc plates are installed between the movable plate and the stable plate, and the inner wall of the arc plate is fixed with a second fixed plate;

[0010] The four arc-shaped plates rotate and conflict with each other to form a cylinder;

[0011] The first fixing plate, the second fixing plate and the arc-shaped plate form a cavity, the through hole and the cavity are kept vertical, water enters the cavity through the through hole, and is sprayed out through the gap between the first fixing plate and the second fixing plate to backwash the filter cartridge;

[0012] The transmission assembly comprises a fixed ring fixed inside the housing, and the movable plate is movably sleeved on the inner wall of the fixed ring;

[0013] A transmission gear is fixedly mounted at the bottom of the arc-shaped plate, a second transmission rod is fixedly mounted at the bottom of the transmission gear, a second transmission ring is movably sleeved on the outside of the second transmission rod, a second guide groove is provided on the outside of the second transmission rod, and a sealing ring is fixedly mounted on the outside of the second transmission ring for sealing the circular hole in the middle of the movable plate;

[0014] The second transmission ring is initially located at the upper end of the second transmission rod, and the sealing ring is engaged in the circular hole.

[0015] Preferably, a circular hole communicating with the filter cartridge is provided in the middle of the movable plate;

[0016] In the initial state, the through hole and the circular hole are in a closed state, and the sewage enters the filter cartridge through the top of the shell to be filtered and is discharged through the outside of the shell;

[0017] The transmission assembly drives the four arc-shaped plates to rotate to form a cylinder, the through slot is in a closed state, and the through hole is connected with the circular hole.

[0018] Preferably, a first transmission rod is fixedly mounted on the top of the arc-shaped plate, a first guide groove is formed on the outside of the first transmission rod, a first transmission ring is sleeved on the outside of the first transmission rod, and the first transmission ring is movably engaged in the first guide groove;

[0019] The arc plate rotates, so that the first transmission ring moves up and down under the guidance of the first guide groove.

[0020] Preferably, a first connecting frame is fixedly mounted on the outside of the first transmission ring, and a valve ring sleeved on the outside of the second connecting frame is fixedly mounted on one end of the first connecting frame;

[0021] The height of the valve ring is greater than the height of the through groove;

[0022] In an initial state, the valve ring is located at the upper end of the second connecting frame, and the first transmission ring moves downward along the first transmission rod, thereby driving the valve ring to seal the through groove.

[0023] Preferably, a valve plug is fixedly mounted on the other end of the first connecting frame to prevent the through hole from being blocked, and a filter plate is fixedly mounted on the valve plug;

[0024] The first transmission ring is located at the upper end of the first transmission rod, the valve plug prevents the through hole from being blocked, the first transmission ring moves downward along the first transmission rod, the through hole is in an open state, and the filter plate is located at the top of the through hole.

[0025] Preferably, the bottom movable sleeve of the fixed ring is provided with a transmission wheel, the transmission wheel is connected to the output end of the driving motor through a belt, the inner wall of the transmission wheel is fixed with a tooth plate meshing with the transmission gear, and one end of the tooth plate is fixed with a limiting tooth.

[0026] Preferably, the guide assembly comprises a fixing frame fixedly mounted on the inner wall of the housing, a connecting plate is fixedly mounted on the bottom of the fixing frame, and a spring is fixedly mounted on the bottom of the connecting plate;

[0027] The spring sheet abuts against the top of the stabilizing plate.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention forms a cylinder by rotating four arc-shaped plates. During the rotation, the through groove is in a closed state, the second fixed plate and the first fixed plate form a cavity, and the circular hole is in an open state. Since the through hole and the cavity remain vertical, water between the shell and the stabilizing plate enters the cavity formed by the first fixed plate, the second fixed plate and the arc-shaped plate through the through hole, and is discharged through the gap between the first fixed plate and the second fixed plate. The cylinder is formed by four arc-shaped plates, and water cannot be discharged through the drain pipe. The flow rate of water is increased through the gap between the first fixed plate and the second fixed plate, and the surface of the filter cartridge is impacted to achieve the purpose of backwashing. In this process, the effect of backwashing of the filter cartridge is improved, and at the same time, the equipment for backwashing is reduced, and the cost of backwashing of the filter material is reduced.

[0030] The present invention uses a spring sheet to contact the top of the stabilizing plate and apply resistance to the stabilizing plate, and first drives the transmission gear to rotate through the tooth plate. During the rotation, the limit tooth engages with the transmission gear. At this time, the transmission gear is limited and cannot rotate. The movable plate, the arc plate and the stabilizing plate are driven to rotate through the transmission wheel, the tooth plate and the limit tooth. The arc plate, the first fixed plate and the second fixed plate rotate with the filter cartridge as the central axis, and water is always discharged through the gap between the first fixed plate and the second fixed plate, and rotates along the filter cartridge to flush it, thereby improving the filter cartridge flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1It is a schematic diagram of the overall appearance structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the appearance structure of the flow guide component of the present invention;

[0034] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0035] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0036] Figure 6 It is a schematic diagram of the coordination structure between the flow guide assembly and the guide assembly of the present invention;

[0037] Figure 7 This is a schematic diagram of the disassembled structure of the flow guide assembly of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the initial state of the flow guide component of the present invention;

[0039] Fig. 9 This is a schematic diagram of the structure of the guide assembly of the present invention after movement;

[0040] Fig.10 This is a schematic diagram of the disassembled structure of the transmission assembly of the present invention.

[0041] In the figure: 1. shell; 2. guide assembly; 21. movable plate; 211. first transmission rod; 212. first guide groove; 213. first transmission ring; 214. filter plate; 215. through hole; 216. valve ring; 217. first connecting frame; 218. valve plug; 22. filter cartridge; 23. arc plate; 24. stabilizing plate; 25. second connecting frame; 26. through groove; 27. first fixed plate; 28. second fixed plate; 3. guide assembly; 31. fixed frame; 311. connecting plate; 312. spring; 4. transmission assembly; 41. transmission gear; 42. second guide groove; 43. second transmission rod; 44. sealing ring; 45. second transmission ring; 46. transmission wheel; 47. tooth plate; 48. limit tooth; 49. fixing ring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 10 As shown, the present invention provides a backwashing device for filter material, comprising a housing 1, a drain pipe is installed outside the housing 1, and further comprising;

[0044] A flow guide component 2, the flow guide component 2 is arranged in the shell 1;

[0045] A guide assembly 3, the guide assembly 3 is fixed to the inner wall of the housing 1;

[0046] A transmission assembly 4, which is installed inside the housing 1 and connected to the bottom of the guide assembly 2. A driving motor is installed outside the housing 1 and drives the transmission assembly 4 through a belt;

[0047] The flow guide assembly 2 includes a stabilizing plate 24 movably sleeved inside the housing 1, a through hole 215 is provided on the stabilizing plate 24, a second connecting frame 25 is movably installed in the middle of the stabilizing plate 24, a filter cartridge 22 is fixedly installed at the bottom of the second connecting frame 25, and a through groove 26 is provided outside the second connecting frame 25;

[0048] A movable plate 21 is movably sleeved on the transmission assembly 4, the bottom of the filter cartridge 22 contacts the top of the movable plate 21, a first fixed plate 27 is fixed on the top of the movable plate 21, four arc plates 23 are installed between the movable plate 21 and the stabilizing plate 24, and a second fixed plate 28 is fixed on the inner wall of the arc plate 23;

[0049] The four arc-shaped plates 23 rotate and contact each other to form a cylinder;

[0050] The first fixing plate 27, the second fixing plate 28 and the arc plate 23 form a cavity, the through hole 215 and the cavity remain vertical, water enters the cavity through the through hole 215, and is sprayed out through the gap between the first fixing plate 27 and the second fixing plate 28 to backwash the filter cartridge 22;

[0051] A circular hole communicating with the filter cartridge 22 is provided in the middle of the movable plate 21;

[0052] In the initial state, the through hole 215 and the circular hole are in a closed state, and the sewage enters the filter cartridge 22 through the top of the housing 1 to be filtered and then discharged from the outside of the housing 1;

[0053] The transmission assembly 4 drives the four arc-shaped plates 23 to rotate to form a cylinder, the through slot 26 is in a closed state, and the through hole 215 is in communication with the circular hole;

[0054] The transmission assembly 4 includes a fixed ring 49 fixed inside the housing 1, and the movable plate 21 is movably sleeved on the inner wall of the fixed ring 49;

[0055] A transmission gear 41 is fixedly mounted at the bottom of the arc plate 23, a second transmission rod 43 is fixedly mounted at the bottom of the transmission gear 41, a second transmission ring 45 is movably sleeved on the outside of the second transmission rod 43, a second guide groove 42 is provided on the outside of the second transmission rod 43, and a sealing ring 44 is fixedly mounted on the outside of the second transmission ring 45 for sealing the circular hole in the middle of the movable plate 21;

[0056] The second transmission ring 45 is initially located at the upper end of the second transmission rod 43, and the sealing ring 44 is engaged in the circular hole;

[0057] The bottom movable sleeve of the fixed ring 49 is provided with a transmission wheel 46, which is connected to the output end of the driving motor through a belt. The inner wall of the transmission wheel 46 is fixed with a tooth plate 47 meshing with the transmission gear 41, and one end of the tooth plate 47 is fixed with a limit tooth 48.

[0058] Sewage enters between the shell 1 and the stabilizing plate 24 through the top of the shell 1. In the initial state, the through slot 26 is in an open state, while the through hole 215 and the circular hole are in a closed state. Sewage enters the filter cartridge 22 through the through slot 26 for filtration treatment and is discharged through the drain pipe outside the shell 1. When the filter cartridge 22 needs to be backwashed, the drive motor drives the transmission wheel 46 to rotate, and the transmission gear 41 rotates under the action of the tooth plate 47. The four arc plates 23 rotate to form a cylinder, and at the same time drive the first transmission rod 211 and the second transmission rod 43 to rotate respectively. The rotation of the first transmission rod 211 makes the through hole 215 in an open state, while the through slot 26 is in a closed state. Water cannot enter through the top of the filter cartridge 22. During the rotation, the through slot 26 is in a closed state. The arc plate 23, the second fixed plate 28 and the first fixed plate 27 form a A cavity, and the circular hole is in an open state, and the through hole 215 is in an open state. Since the through hole 215 and the cavity remain vertical, the water between the shell 1 and the stabilizing plate 24 enters the cavity formed by the first fixed plate 27, the second fixed plate 28 and the arc plate 23 through the through hole 215, and is discharged through the gap between the first fixed plate 27 and the second fixed plate 28. The cylinder is formed by four arc plates 23, and the water cannot be discharged through the drain pipe. The flow rate of the water is increased through the gap between the first fixed plate 27 and the second fixed plate 28, and the surface of the filter cartridge 22 is impacted to achieve the purpose of backwashing. The second transmission rod 43 rotates the second transmission ring 45 and moves downward along the second transmission rod 43 under the guidance of the second guide groove 42, so that the sealing ring 44 is separated from the seal of the circular hole in the middle of the movable plate 21, and the sewage backwashed by the filter cartridge 22 can be discharged through the circular hole.

[0059] like Figure 3-Figure 9 As shown, a first transmission rod 211 is fixedly mounted on the top of the arc plate 23, a first guide groove 212 is formed on the outside of the first transmission rod 211, a first transmission ring 213 is sleeved on the outside of the first transmission rod 211, and the first transmission ring 213 is movably engaged in the first guide groove 212;

[0060] The arc plate 23 rotates, so that the first transmission ring 213 moves up and down under the guidance of the first guide groove 212;

[0061] A first connecting frame 217 is fixedly mounted on the outside of the first transmission ring 213, and a valve ring 216 sleeved on the outside of the second connecting frame 25 is fixedly mounted on one end of the first connecting frame 217;

[0062] The height of the valve ring 216 is greater than the height of the through groove 26;

[0063] In the initial state, the valve ring 216 is located at the upper end of the second connecting frame 25, and the first transmission ring 213 moves downward along the first transmission rod 211, thereby driving the valve ring 216 to seal the through groove 26;

[0064] The other end of the first connecting frame 217 is fixedly mounted with a valve plug 218 for preventing the through hole 215 from being blocked, and the filter plate 214 is fixedly mounted on the valve plug 218;

[0065] The first transmission ring 213 is located at the upper end of the first transmission rod 211 , the valve plug 218 prevents the through hole 215 from being blocked, the first transmission ring 213 moves downward along the first transmission rod 211 , the through hole 215 is in an open state, and the filter plate 214 is located at the top of the through hole 215 .

[0066] The driving motor drives the transmission assembly 4 and the arc plate 23 to rotate, the first transmission rod 211 rotates the first transmission ring 213, and under the guidance of the first guide groove 212, it moves down along the first transmission rod 211 and drives the first connecting frame 217 and the valve ring 216 to move down gradually to block the through groove 26, and at the same time, the filter plate 214 and the valve plug 218 move down with the first connecting frame 217, and the valve plug 218 is separated from the seal of the through hole 215, and the filter plate 214 is located at the top of the through hole 215. The water entering from the top of the shell 1 passes through the filter plate 214 to filter the impurities in the water, and the water enters the cavity through the through hole 215 and is sprayed out to backwash the filter cartridge 22.

[0067] like Figure 3 and Figure 4 As shown, the guide assembly 3 includes a fixing frame 31 fixed to the inner wall of the housing 1, a connecting plate 311 is fixed to the bottom of the fixing frame 31, and a spring piece 312 is fixed to the bottom of the connecting plate 311;

[0068] The spring piece 312 abuts against the top of the stabilizing plate 24 .

[0069] The driving motor drives the transmission wheel 46 to rotate through the belt. Since the spring piece 312 contacts the top of the stabilizing plate 24 and applies resistance to the stabilizing plate 24, the transmission gear 41 is first driven to rotate through the tooth plate 47. During the rotation, the limit tooth 48 meshes with the transmission gear 41. At this time, the transmission gear 41 is limited and cannot rotate. The movable plate 21, the arc plate 23 and the stabilizing plate 24 are driven to rotate through the transmission wheel 46, the tooth plate 47 and the limit tooth 48. The arc plate 23, the first fixed plate 27 and the second fixed plate 28 rotate with the filter cartridge 22 as the central axis, and water is always discharged through the gap between the first fixed plate 27 and the second fixed plate 28, and rotates along the filter cartridge 22 to flush it, thereby improving the flushing effect of the filter cartridge 22.

[0070] The working principle and use process of the present invention:

[0071] Sewage enters between the housing 1 and the stabilizing plate 24 through the top of the housing 1. In the initial state, the through slot 26 is in an open state while the through hole 215 and the circular hole are in a closed state. Sewage enters the filter cartridge 22 through the through slot 26 for filtration and is discharged through the drain pipe outside the housing 1.

[0072] The driving motor drives the transmission wheel 46 to rotate through the belt. Since the spring piece 312 contacts the top of the stabilizing plate 24 and applies resistance to the stabilizing plate 24, the transmission gear 41 and the arc plate 23 are first driven to rotate through the tooth plate 47. The four arc plates 23 rotate to form a cylinder. The second fixed plate 28, the first fixed plate 27 and the arc plate 23 form a cavity. The first transmission rod 211 rotates the first transmission ring 213, which moves downward along the first transmission rod 211 under the guidance of the first guide groove 212 and drives the first connecting frame 217 and the valve ring 216 to move downward to gradually block the through groove 26. At the same time, the filter plate 214 and the valve plug 218 move downward with the first connecting frame 217. The valve plug 218 is separated from the seal of the through hole 215, and the filter plate 214 is located at the top of the through hole 215. The water entering from the top of the housing 1 passes through the filter plate 214 to filter the impurities in the water, and the water enters the cavity through the through hole 215 and is sprayed out to perform backwashing on the filter cartridge 22.

[0073] During the rotation of the tooth plate 47, the limiting tooth 48 meshes with the transmission gear 41. At this time, the transmission gear 41 is limited and cannot rotate. The movable plate 21, the arc plate 23 and the stabilizing plate 24 are driven to rotate through the transmission wheel 46, the tooth plate 47 and the limiting tooth 48. The arc plate 23, the first fixed plate 27 and the second fixed plate 28 rotate with the filter cartridge 22 as the central axis, and water is always discharged through the gap between the first fixed plate 27 and the second fixed plate 28, and rotates along the filter cartridge 22 to flush it. The second transmission rod 43 rotates, and the second transmission ring 45 moves downward along the second transmission rod 43 under the guidance of the second guide groove 42, so that the sealing ring 44 is separated from the seal of the circular hole in the middle of the movable plate 21, and the sewage backwashed by the filter cartridge 22 is discharged through the circular hole.

[0074] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0075] 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 filter material backwashing device, comprising a housing (1), wherein a drain pipe is installed outside the housing (1), and wherein: Also includes; A flow guide component (2), wherein the flow guide component (2) is arranged in the shell (1); A guide assembly (3), the guide assembly (3) being fixedly mounted on the inner wall of the housing (1); A transmission assembly (4), the transmission assembly (4) being installed inside the housing (1) and connected to the bottom of the flow guide assembly (2); a drive motor being installed outside the housing (1) and driving the transmission assembly (4) via a belt; The flow guide assembly (2) comprises a stabilizing plate (24) movably sleeved inside the housing (1), a through hole (215) being provided on the stabilizing plate (24), a second connecting frame (25) being movably mounted in the middle of the stabilizing plate (24), a filter cartridge (22) being fixedly mounted at the bottom of the second connecting frame (25), and a through groove (26) being provided on the outside of the second connecting frame (25); A movable plate (21) is movably sleeved on the transmission assembly (4); the bottom of the filter cartridge (22) contacts the top of the movable plate (21); a first fixed plate (27) is fixedly mounted on the top of the movable plate (21); four arc-shaped plates (23) are mounted between the movable plate (21) and the stabilizing plate (24); a second fixed plate (28) is fixedly mounted on the inner wall of the arc-shaped plate (23); The four arc-shaped plates (23) rotate and contact each other to form a cylinder; The first fixing plate (27), the second fixing plate (28) and the arc-shaped plate (23) form a cavity, the through hole (215) and the cavity remain vertical, water enters the cavity through the through hole (215), and is sprayed out through the gap between the first fixing plate (27) and the second fixing plate (28) to backwash the filter cartridge (22); The transmission assembly (4) comprises a fixed ring (49) fixedly mounted inside the housing (1), and the movable plate (21) is movably sleeved on the inner wall of the fixed ring (49); A transmission gear (41) is fixedly mounted on the bottom of the arc-shaped plate (23); a second transmission rod (43) is fixedly mounted on the bottom of the transmission gear (41); a second transmission ring (45) is movably sleeved on the outside of the second transmission rod (43); a second guide groove (42) is formed on the outside of the second transmission rod (43); and a sealing ring (44) is fixedly mounted on the outside of the second transmission ring (45) for sealing the circular hole in the middle of the movable plate (21); The second transmission ring (45) is initially located at the upper end of the second transmission rod (43), and the sealing ring (44) is engaged in the circular hole; A circular hole communicating with the filter cartridge (22) is provided in the middle of the movable plate (21); In the initial state, the through hole (215) and the circular hole are in a closed state, and sewage enters the filter cartridge (22) through the top of the shell (1) to be filtered and is discharged from the outside of the shell (1); The transmission assembly (4) drives the four arc-shaped plates (23) to rotate to form a cylinder, the through slot (26) is in a closed state, and the through hole (215) is connected to the circular hole; A transmission wheel (46) is provided on the bottom movable sleeve of the fixed ring (49). The transmission wheel (46) is connected to the output end of the driving motor via a belt. A toothed plate (47) meshing with the transmission gear (41) is fixedly mounted on the inner wall of the transmission wheel (46). A limiting tooth (48) is fixedly mounted on one end of the toothed plate (47).

2. The filter material backwashing device according to claim 1, characterized in that: A first transmission rod (211) is fixedly mounted on the top of the arc-shaped plate (23); a first guide groove (212) is formed on the outside of the first transmission rod (211); a first transmission ring (213) is sleeved on the outside of the first transmission rod (211); and the first transmission ring (213) is movably engaged in the first guide groove (212); The arc-shaped plate (23) rotates, causing the first transmission ring (213) to move up and down under the guidance of the first guide groove (212).

3. The backwashing device for filter material according to claim 2, characterized in that: A first connecting frame (217) is fixedly mounted on the outside of the first transmission ring (213); a valve ring (216) sleeved on the outside of the second connecting frame (25) is fixedly mounted on one end of the first connecting frame (217); The height of the valve ring (216) is greater than the height of the through groove (26); In an initial state, the valve ring (216) is located at the upper end of the second connecting frame (25), and the first transmission ring (213) moves downward along the first transmission rod (211), thereby driving the valve ring (216) to seal the through groove (26).

4. The backwashing device for filter material according to claim 3, characterized in that: A valve plug (218) is fixedly mounted on the other end of the first connecting frame (217) to prevent the through hole (215) from being blocked, and a filter plate (214) is fixedly mounted on the valve plug (218); The first transmission ring (213) is located at the upper end of the first transmission rod (211), the valve plug (218) prevents the through hole (215) from being blocked, the first transmission ring (213) moves downward along the first transmission rod (211), the through hole (215) is in an open state, and the filter plate (214) is located at the top of the through hole (215).

5. The backwashing device for filter material according to claim 4, characterized in that: The guide assembly (3) comprises a fixing frame (31) fixedly mounted on the inner wall of the housing (1), a connecting plate (311) being fixedly mounted on the bottom of the fixing frame (31), and a spring sheet (312) being fixedly mounted on the bottom of the connecting plate (311); The spring sheet (312) abuts against the top of the stabilizing plate (24).

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