Cleaning system and method for ultrafiltration membrane assembly in water purification equipment

Abstract

The invention discloses a cleaning system and method for an ultrafiltration membrane assembly in water purification equipment, and relates to the technical field of ultrafiltration membrane assembly cleaning.The device comprises a supporting frame, and a first fixing frame and a second fixing frame are installed on the two sides of the upper end of the supporting frame respectively; placing frames are installed on the sides, close to the center position of the supporting frame, of the upper ends of the first fixing frame and the second fixing frame correspondingly, a moving cylinder is arranged between the first fixing frame and the second fixing frame, and blow-off pipes are installed at the lower ends of the side walls, away from the center position of the supporting frame, of the first fixing frame and the second fixing frame correspondingly; and water injection pipes are mounted on the sides, away from the placement rack, of the upper ends of the first fixing frame and the second fixing frame. Through horizontal reciprocating motion of the moving cylinder, cleaning liquid in an ultrafiltration membrane assembly is sucked and moved in a reciprocating mode, the ultrafiltration membrane assembly is efficiently cleaned, under the action of the first one-way valve and the second one-way valve, the cleaning liquid penetrates through a filter screen and is discharged through a second water pipe, and impurities in the cleaning liquid are filtered out.

Description

Technical Field

[0001] The invention relates to the technical field of ultrafiltration membrane assembly cleaning, and in particular to a system and method for cleaning an ultrafiltration membrane assembly in a water purification device. Background Art

[0002] Ultrafiltration membrane assembly is a kind of equipment used for water treatment. It is mainly composed of ultrafiltration membrane filaments. These membrane filaments can be connected with the ultrafiltration system to form a filter assembly. Ultrafiltration membrane assembly is widely used, especially in the case of serious water pollution and secondary pollution. The ultrafiltration membrane purification technology based on high-precision pure physical filtration principle can effectively remove harmful substances such as rust, particles, bacteria, colloids and some organic matter in water.

[0003] After long-term use, a lot of impurities will accumulate inside the ultrafiltration membrane assembly, so the ultrafiltration membrane assembly needs to be cleaned. Most existing ultrafiltration membrane assembly cleaning devices can only flush the ultrafiltration membrane assembly in one direction, with low cleaning efficiency and poor cleaning effect, which is inconvenient for users to use.

[0004] In view of the above problems, an improved cleaning system and method for ultrafiltration membrane components in water purification equipment are now designed. Summary of the invention

[0005] The object of the present invention is to provide a cleaning system and method for an ultrafiltration membrane assembly in a water purification device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A cleaning system for an ultrafiltration membrane assembly in a water purification device comprises a support frame, wherein a first fixed frame and a second fixed frame are respectively installed on both sides of an upper end of the support frame, a gap is arranged between the first fixed frame and the second fixed frame, a placement rack for placing the ultrafiltration membrane assembly is installed on one side of the upper ends of the first fixed frame and the second fixed frame close to the center position of the support frame, a moving cylinder is arranged between the first fixed frame and the second fixed frame, side walls at both ends of the moving cylinder are sealingly and slidably connected to the inner walls of the first fixed frame and the second fixed frame, the moving cylinder can move reciprocally horizontally, and the two ends will not separate from the first fixed frame and the second fixed frame, a sewage pipe is installed at the lower end of the side wall of the first fixed frame and the second fixed frame away from the center position of the support frame, a water injection pipe is installed on the side of the upper ends of the first fixed frame and the second fixed frame away from the placement rack, valves are installed on the sewage pipe and the water injection pipe, and a cleaning mechanism for reciprocating suction cleaning of the ultrafiltration membrane assembly is arranged on the first fixed frame and the second fixed frame.

[0008] As a further solution of the present invention: the cleaning mechanism includes a partition, which is installed at the center position of the moving cylinder, and the partition divides the moving cylinder into two chambers. A first water pipe is installed on the side wall of the first fixed frame away from the moving cylinder, and a first connecting hose is installed at one end of the first water pipe away from the first fixed frame, and the end of the first connecting hose away from the first water pipe is detachably connected to the raw liquid inlet of the ultrafiltration membrane assembly. A third water pipe is installed on the side wall of the second fixed frame away from the moving cylinder, and a plurality of second connecting hoses are installed on the upper end of the side wall of the third water pipe, and the end of the second connecting hose away from the third water pipe is detachably connected to the water production port and the sewage discharge port of the ultrafiltration membrane assembly. A driving assembly for driving the moving cylinder to reciprocate is arranged inside the support frame, and a filtering assembly for filtering impurities is arranged on the moving cylinder.

[0009] As a further solution of the present invention: the driving assembly includes a rotating rod, which is horizontally arranged inside the support frame, and the rotating rod is parallel to the moving cylinder. A motor for driving the rotating rod to rotate is installed at one end of the rotating rod, and the motor is installed on the inner wall of the support frame. The end of the rotating rod away from the motor is rotatably connected to the inner wall of the support frame, a reciprocating screw is installed on the side wall of the rotating rod, and the side wall of the reciprocating screw is rotatably connected to a moving block through a thread, a connecting block is installed at the upper end of the moving block, and the end of the connecting block away from the moving block is installed at the lower end of the moving cylinder.

[0010] As a further solution of the present invention: the filter assembly includes two filter screens for filtering impurities, the two filter screens are installed at both ends of the moving cylinder, the upper ends of the moving cylinders on both sides of the partition are installed with second water pipes, the second water pipes are installed with second one-way valves that only allow water inside the moving cylinder to be output through the second water pipe, the end of the second water pipe away from the moving cylinder is installed with a third connecting hose, the output end of the third connecting hose close to the first water pipe is connected to the side wall of the first water pipe, and the output end of the third connecting hose close to the third water pipe is connected to the side wall of the third water pipe, the side wall of the first water pipe close to the first fixed frame and the side wall of the third water pipe close to the second fixed frame are both installed with first one-way valves, the first one-way valve on the first water pipe only allows water to be transported to the first fixed frame through the first water pipe, the first one-way valve on the third water pipe only allows water to be transported to the second fixed frame through the third water pipe, the upper ends of the first fixed frame and the second fixed frame are provided with elastic support components for keeping the third connecting hose tight when the moving cylinder moves, and the interior of the moving cylinder is provided with an anti-blocking component for cleaning the filter screen.

[0011] As a further solution of the present invention: the elastic support assembly includes two elastic telescopic rods, and the output ends of the elastic telescopic rods are installed with a limiting frame for limiting the third connecting hose, and the third connecting hose is placed inside the limiting frame.

[0012] As a further solution of the present invention: the anti-blocking component includes two conical covers, and the two conical covers are installed on the inner wall of the movable cylinder on both sides of the partition, the narrow end of the conical cover faces the partition, and the narrow end of the conical cover is installed with a support rod, and the center position of the support rod is rotatably connected with a rotating shaft, the end of the rotating shaft close to the partition passes through the narrow mouth of the conical cover and is installed with fan blades, and the end of the rotating shaft away from the partition passes through the filter screen and is installed with a cleaning rod for cleaning the filter screen, and the cleaning rod is tightly attached to the filter screen.

[0013] As a further solution of the present invention: a guide strip for guiding the cleaning liquid is installed on the inner wall of the conical cover.

[0014] As a further solution of the present invention: a rubber pad is installed on the inner wall of the placement rack for facilitating the placement of the ultrafiltration membrane assembly.

[0015] As a further solution of the present invention: triangular ribs are installed on the side walls at both ends of the connecting block for stably connecting the connecting block with the moving block and the moving cylinder.

[0016] A method for using a cleaning system for an ultrafiltration membrane assembly in a water purification device comprises the following steps:

[0017] Step 1: First place the ultrafiltration membrane assembly on the placement rack, then connect the first connecting hose to the raw liquid water inlet of the ultrafiltration membrane assembly, connect the second connecting hose to the water outlet and sewage outlet of the ultrafiltration membrane assembly, and then add cleaning liquid through the water injection pipe until the cleaning liquid is full, and then close the water injection pipe.

[0018] Step 2: Start the motor, the output end of the motor drives the rotating rod to rotate, the rotating rod drives the reciprocating screw to rotate, under the action of the thread, the reciprocating screw drives the moving block to move back and forth, the moving block drives the connecting block to move, and the connecting block drives the moving cylinder to move back and forth.

[0019] When the moving cylinder moves toward the second fixed frame, since the internal space of the second fixed frame becomes smaller, under the action of the first one-way valve and the second one-way valve, the cleaning liquid enters into the moving cylinder through the filter net, so that the filter net filters impurities, and then the cleaning liquid inside the moving cylinder is transported to the interior of the ultrafiltration membrane assembly through the second water pipe, the third connecting hose, the third water pipe, and the second connecting hose in sequence, so as to realize backwash cleaning of the ultrafiltration membrane assembly, and then the ultrafiltration membrane assembly transports the cleaning liquid to the interior of the first fixed frame through the first connecting hose and the first water pipe in sequence.

[0020] When the moving cylinder moves toward the first fixed frame, since the internal space of the first fixed frame becomes smaller, under the action of the first one-way valve and the second one-way valve, the cleaning liquid enters into the moving cylinder through the filter net, so that the filter net filters impurities, and then the cleaning liquid inside the moving cylinder is transported to the interior of the ultrafiltration membrane assembly through the second water pipe, the third connecting hose, the first water pipe, and the first connecting hose in turn, so as to realize forward flushing cleaning of the ultrafiltration membrane assembly, and then the ultrafiltration membrane assembly transports the cleaning liquid to the interior of the second fixed frame through the second connecting hose and the third water pipe in turn, so as to realize reciprocating suction cleaning of the ultrafiltration membrane assembly.

[0021] Step 3: When the moving cylinder moves, the conical cover moving away from the center of the support frame will collect the cleaning liquid and discharge it through the narrow opening. The output cleaning liquid drives the fan blades to rotate, the fan blades drive the rotating shaft to rotate, and the rotating shaft drives the cleaning rod to rotate, so that the cleaning rod cleans the filter to prevent impurities from clogging the filter.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention uses the horizontal reciprocating movement of the moving cylinder to reciprocately pump and move the cleaning liquid inside the ultrafiltration membrane assembly, thereby efficiently cleaning the ultrafiltration membrane assembly and improving the cleaning efficiency of the ultrafiltration membrane assembly.

[0024] The present invention cleans the ultrafiltration membrane assembly reciprocatingly, and under the action of the first one-way valve and the second one-way valve, the cleaning liquid is wiped through the filter screen and discharged through the second water pipe, thereby filtering impurities in the cleaning liquid, and clean cleaning liquid enters the ultrafiltration membrane assembly each time, further improving the cleaning efficiency of the ultrafiltration membrane assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure of the driving component in the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the filter assembly in the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the anti-blocking component in the present invention.

[0029] Wherein: 1. support frame; 2. first fixed frame; 3. elastic telescopic rod; 4. sewage pipe; 5. first one-way valve; 6. first water pipe; 7. water injection pipe; 8. limit frame; 9. first connecting hose; 10. placement rack; 11. second connecting hose; 12. second one-way valve; 13. connecting block; 14. second water pipe; 15. moving cylinder; 16. third connecting hose; 17. filter screen; 18. motor; 19. rotating rod; 20. moving block; 21. reciprocating screw; 22. partition; 23. cleaning rod; 24. rotating shaft; 25. conical cover; 26. fan blade; 27. support rod; 28. second fixed frame; 29. ​​third water pipe. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-Figure 4 In an embodiment of the present invention, a cleaning system for an ultrafiltration membrane assembly in a water purification device includes a support frame 1, a first fixed frame 2 and a second fixed frame 28 are respectively installed on both sides of the upper end of the support frame 1, a gap is set between the first fixed frame 2 and the second fixed frame 28, a placement rack 10 for placing the ultrafiltration membrane assembly is installed on one side of the upper end of the first fixed frame 2 and the second fixed frame 28 close to the center position of the support frame 1, a moving cylinder 15 is arranged between the first fixed frame 2 and the second fixed frame 28, and the side walls at both ends of the moving cylinder 15 are connected to the first fixed frame 2 and the second fixed frame The inner wall of the fixed frame 28 is sealed and slidably connected, and the movable cylinder 15 can move reciprocatingly horizontally, and the two ends will not separate from the first fixed frame 2 and the second fixed frame 28. The lower ends of the side walls of the first fixed frame 2 and the second fixed frame 28 away from the center position of the support frame 1 are both installed with a sewage pipe 4, and the upper ends of the first fixed frame 2 and the second fixed frame 28 are both installed with a water injection pipe 7 on the side away from the placement rack 10. Valves are installed on the sewage pipe 4 and the water injection pipe 7, and the first fixed frame 2 and the second fixed frame 28 are provided with a cleaning mechanism for reciprocating suction and cleaning of the ultrafiltration membrane assembly.

[0032] The cleaning mechanism includes a partition 22, which is installed at the center position of the moving cylinder 15. The partition 22 divides the moving cylinder 15 into two chambers. A first water pipe 6 is installed on the side wall of the first fixed frame 2 away from the moving cylinder 15, and a first connecting hose 9 is installed on the end of the first water pipe 6 away from the first fixed frame 2. The end of the first connecting hose 9 away from the first water pipe 6 is detachably connected to the raw liquid water inlet of the ultrafiltration membrane assembly. A third water pipe 29 is installed on the side wall of the second fixed frame 28 away from the moving cylinder 15. Several second connecting hoses 11 are installed on the upper end of the side wall of the third water pipe 29. The end of the second connecting hose 11 away from the third water pipe 29 is detachably connected to the water production port and the sewage outlet of the ultrafiltration membrane assembly. A driving component for driving the moving cylinder 15 to move back and forth is arranged inside the support frame 1, and a filtering component for filtering impurities is arranged on the moving cylinder 15.

[0033] The driving assembly includes a rotating rod 19, which is horizontally arranged inside the support frame 1. The rotating rod 19 and the moving cylinder 15 are parallel to each other. A motor 18 for driving the rotating rod 19 to rotate is installed at one end of the rotating rod 19, and the motor 18 is installed on the inner wall of the support frame 1. The end of the rotating rod 19 away from the motor 18 is rotatably connected to the inner wall of the support frame 1. A reciprocating screw 21 is installed on the side wall of the rotating rod 19, and the side wall of the reciprocating screw 21 is rotatably connected to a moving block 20 through a thread. A connecting block 13 is installed at the upper end of the moving block 20, and the end of the connecting block 13 away from the moving block 20 is installed at the lower end of the moving cylinder 15.

[0034] When in use, start the motor 18, the output end of the motor 18 drives the rotating rod 19 to rotate, the rotating rod 19 drives the reciprocating screw 21 to rotate, under the action of the thread, the reciprocating screw 21 drives the moving block 20 to move back and forth, the moving block 20 drives the connecting block 13 to move, and the connecting block 13 drives the moving cylinder 15 to move back and forth.

[0035] The filter assembly includes two filter screens 17 for filtering impurities, the two filter screens 17 are installed at both ends of the moving cylinder 15, the upper ends of the moving cylinders 15 on both sides of the partition 22 are installed with second water pipes 14, the second water pipes 14 are installed with second one-way valves 12 that only allow water inside the moving cylinder 15 to be output through the second water pipes 14, the end of the second water pipe 14 away from the moving cylinder 15 is installed with a third connecting hose 16, the output end of the third connecting hose 16 close to the first water pipe 6 is connected to the side wall of the first water pipe 6, and the output end of the third connecting hose 16 close to the third water pipe 29 is connected to the side wall of the third water pipe 29 The first water pipe 6 and the third water pipe 29 are connected, and the first one-way valve 5 is installed on the side wall of the first fixed frame 2 near the first water pipe 6 and the side wall of the third water pipe 29 near the second fixed frame 28. The first one-way valve 5 on the first water pipe 6 only allows water to be transported to the first fixed frame 2 through the first water pipe 6, and the first one-way valve 5 on the third water pipe 29 only allows water to be transported to the second fixed frame 28 through the third water pipe 29. The upper ends of the first fixed frame 2 and the second fixed frame 28 are provided with elastic supporting components for keeping the third connecting hose 16 taut when the moving cylinder 15 moves, and the interior of the moving cylinder 15 is provided with an anti-blocking component for cleaning the filter screen 17.

[0036] When the movable cylinder 15 moves toward the second fixed frame 28, since the internal space of the second fixed frame 28 becomes smaller, under the action of the first one-way valve 5 and the second one-way valve 12, the cleaning liquid enters into the movable cylinder 15 through the filter screen 17, so that the filter screen 17 filters the impurities, and then the cleaning liquid in the movable cylinder 15 is transported to the interior of the ultrafiltration membrane assembly through the second water pipe 14, the third connecting hose 16, the third water pipe 29, and the second connecting hose 11 in turn, so as to realize the backwash cleaning of the ultrafiltration membrane assembly, and then the ultrafiltration membrane assembly transports the cleaning liquid to the interior of the first fixed frame 2 through the first connecting hose 9 and the first water pipe 6 in turn.

[0037] When the mobile cylinder 15 moves toward the first fixed frame 2, since the internal space of the first fixed frame 2 becomes smaller, under the action of the first one-way valve 5 and the second one-way valve 12, the cleaning liquid enters into the mobile cylinder 15 through the filter screen 17, so that the filter screen 17 filters the impurities, and then the cleaning liquid in the mobile cylinder 15 is transported to the interior of the ultrafiltration membrane assembly through the second water pipe 14, the third connecting hose 16, the first water pipe 6, and the first connecting hose 9 in turn, so as to realize the forward flushing cleaning of the ultrafiltration membrane assembly, and then the ultrafiltration membrane assembly transports the cleaning liquid to the interior of the second fixed frame 28 through the second connecting hose 11 and the third water pipe 29 in turn, so as to realize the reciprocating suction cleaning of the ultrafiltration membrane assembly.

[0038] The elastic support assembly includes two elastic telescopic rods 3 , and a limiting frame 8 for limiting the position of the third connecting hose 16 is installed at the output end of the elastic telescopic rod 3 . The third connecting hose 16 is placed inside the limiting frame 8 .

[0039] The anti-blocking component includes two conical covers 25, and the two conical covers 25 are installed on the inner wall of the moving cylinder 15 on both sides of the partition 22. The narrow end of the conical cover 25 faces the partition 22, and a support rod 27 is installed at the narrow end of the conical cover 25. The center position of the support rod 27 is rotatably connected with a rotating shaft 24. The end of the rotating shaft 24 close to the partition 22 passes through the narrow mouth of the conical cover 25 and is installed with a fan blade 26. The end of the rotating shaft 24 away from the partition 22 passes through the filter screen 17 and is installed with a cleaning rod 23 for cleaning the filter screen 17. The cleaning rod 23 is tightly attached to the filter screen 17.

[0040] When the moving cylinder 15 moves, the conical cover 25 moving away from the center position of the support frame 1 will collect the cleaning liquid and discharge it through the narrow mouth. The output cleaning liquid drives the fan blades 26 to rotate, the fan blades 26 drive the rotating shaft 24 to rotate, and the rotating shaft 24 drives the cleaning rod 23 to rotate, so that the cleaning rod 23 cleans the filter screen 17 to prevent impurities from clogging the filter screen 17.

[0041] Working principle of a cleaning system for ultrafiltration membrane components in a water purification device:

[0042] First place the ultrafiltration membrane assembly on the placement rack 10, then connect the first connecting hose 9 to the raw liquid water inlet of the ultrafiltration membrane assembly, connect the second connecting hose 11 to the water outlet and sewage outlet of the ultrafiltration membrane assembly, and then add cleaning liquid through the water injection pipe 7 until the cleaning liquid is full, and then close the water injection pipe 7.

[0043] Then start the motor 18, the output end of the motor 18 drives the rotating rod 19 to rotate, the rotating rod 19 drives the reciprocating screw 21 to rotate, under the action of the thread, the reciprocating screw 21 drives the moving block 20 to move back and forth, the moving block 20 drives the connecting block 13 to move, and the connecting block 13 drives the moving cylinder 15 to move back and forth.

[0044] When the movable cylinder 15 moves toward the second fixed frame 28, since the internal space of the second fixed frame 28 becomes smaller, under the action of the first one-way valve 5 and the second one-way valve 12, the cleaning liquid enters into the movable cylinder 15 through the filter screen 17, so that the filter screen 17 filters the impurities, and then the cleaning liquid in the movable cylinder 15 is transported to the interior of the ultrafiltration membrane assembly through the second water pipe 14, the third connecting hose 16, the third water pipe 29, and the second connecting hose 11 in turn, so as to realize the backwash cleaning of the ultrafiltration membrane assembly, and then the ultrafiltration membrane assembly transports the cleaning liquid to the interior of the first fixed frame 2 through the first connecting hose 9 and the first water pipe 6 in turn.

[0045] When the mobile cylinder 15 moves toward the first fixed frame 2, since the internal space of the first fixed frame 2 becomes smaller, under the action of the first one-way valve 5 and the second one-way valve 12, the cleaning liquid enters into the mobile cylinder 15 through the filter screen 17, so that the filter screen 17 filters the impurities, and then the cleaning liquid in the mobile cylinder 15 is transported to the interior of the ultrafiltration membrane assembly through the second water pipe 14, the third connecting hose 16, the first water pipe 6, and the first connecting hose 9 in turn, so as to realize the forward flushing cleaning of the ultrafiltration membrane assembly, and then the ultrafiltration membrane assembly transports the cleaning liquid to the interior of the second fixed frame 28 through the second connecting hose 11 and the third water pipe 29 in turn, so as to realize the reciprocating suction cleaning of the ultrafiltration membrane assembly.

[0046] When the moving cylinder 15 moves, the conical cover 25 moving away from the center position of the support frame 1 will collect the cleaning liquid and discharge it through the narrow mouth. The output cleaning liquid drives the fan blades 26 to rotate, the fan blades 26 drive the rotating shaft 24 to rotate, and the rotating shaft 24 drives the cleaning rod 23 to rotate, so that the cleaning rod 23 cleans the filter screen 17 to prevent impurities from clogging the filter screen 17.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A cleaning system for an ultrafiltration membrane assembly in a water purification device, comprising a support frame (1), wherein a first fixing frame (2) and a second fixing frame (28) are respectively installed on both sides of the upper end of the support frame (1), a gap is provided between the first fixing frame (2) and the second fixing frame (28), and a placement rack (10) for placing the ultrafiltration membrane assembly is installed on one side of the upper end of the first fixing frame (2) and the second fixing frame (28) near the center position of the support frame (1), characterized in that: A movable cylinder (15) is arranged between the first fixed frame (2) and the second fixed frame (28); the side walls at both ends of the movable cylinder (15) are sealingly and slidably connected to the inner walls of the first fixed frame (2) and the second fixed frame (28); the movable cylinder (15) can move horizontally back and forth, and the two ends will not be separated from the first fixed frame (2) and the second fixed frame (28); a sewage pipe (4) is installed at the lower end of the side wall of the first fixed frame (2) and the second fixed frame (28) away from the center position of the support frame (1); a water injection pipe (7) is installed at the side of the upper end of the first fixed frame (2) and the second fixed frame (28) away from the placement rack (10); valves are installed on the sewage pipe (4) and the water injection pipe (7); and a cleaning mechanism for reciprocating suction cleaning of the ultrafiltration membrane assembly is arranged on the first fixed frame (2) and the second fixed frame (28).

2. A cleaning system for ultrafiltration membrane components in a water purification device according to claim 1, characterized in that: The cleaning mechanism comprises a partition (22), the partition (22) being installed at the center of the moving cylinder (15), the partition (22) dividing the moving cylinder (15) into two chambers, a first water pipe (6) being installed on the side wall of the first fixed frame (2) away from the moving cylinder (15), a first connecting hose (9) being installed at one end of the first water pipe (6) away from the first fixed frame (2), the end of the first connecting hose (9) away from the first water pipe (6) being detachably connected to the raw liquid water inlet of the ultrafiltration membrane assembly, A third water pipe (29) is installed on the side wall of the second fixed frame (28) away from the moving cylinder (15), and a plurality of second connecting hoses (11) are installed on the upper end of the side wall of the third water pipe (29). One end of the second connecting hose (11) away from the third water pipe (29) is detachably connected to the water production port and sewage discharge port of the ultrafiltration membrane assembly. A driving assembly for driving the moving cylinder (15) to move back and forth is arranged inside the support frame (1), and a filtering assembly for filtering impurities is arranged on the moving cylinder (15).

3. A cleaning system for ultrafiltration membrane components in a water purification device according to claim 2, characterized in that: The driving assembly comprises a rotating rod (19), wherein the rotating rod (19) is horizontally arranged inside the support frame (1), the rotating rod (19) and the moving cylinder (15) are parallel to each other, a motor (18) for driving the rotating rod (19) to rotate is installed at one end of the rotating rod (19), the motor (18) is installed on the inner wall of the support frame (1), the end of the rotating rod (19) away from the motor (18) is rotatably connected to the inner wall of the support frame (1), a reciprocating screw (21) is installed on the side wall of the rotating rod (19), the side wall of the reciprocating screw (21) is rotatably connected to a moving block (20) through a thread, a connecting block (13) is installed at the upper end of the moving block (20), and the end of the connecting block (13) away from the moving block (20) is installed at the lower end of the moving cylinder (15).

4. A cleaning system for ultrafiltration membrane components in a water purification device according to claim 2, characterized in that: The filter assembly comprises two filter screens (17) for filtering impurities, the two filter screens (17) being mounted at both ends of the moving cylinder (15), the upper ends of the moving cylinder (15) on both sides of the partition (22) being mounted with a second water pipe (14), the second water pipe (14) being mounted with a second one-way valve (12) for only allowing water inside the moving cylinder (15) to be output through the second water pipe (14), the end of the second water pipe (14) away from the moving cylinder (15) being mounted with a third connecting hose (16), the output end of the third connecting hose (16) close to the first water pipe (6) being connected to the side wall of the first water pipe (6), and the output end of the third connecting hose (16) close to the third water pipe (29) being connected to the side wall of the third water pipe (29). The first water pipe (6) and the second water pipe (29) are connected to each other, and a first one-way valve (5) is installed on the side wall of the first water pipe (6) close to the first fixed frame (2) and the side wall of the third water pipe (29) close to the second fixed frame (28). The first one-way valve (5) on the first water pipe (6) only allows water to be transported to the first fixed frame (2) through the first water pipe (6), and the first one-way valve (5) on the third water pipe (29) only allows water to be transported to the second fixed frame (28) through the third water pipe (29). The upper ends of the first fixed frame (2) and the second fixed frame (28) are provided with an elastic support component for keeping the third connecting hose (16) tight when the moving cylinder (15) moves, and the interior of the moving cylinder (15) is provided with an anti-blocking component for cleaning the filter screen (17).

5. A cleaning system for ultrafiltration membrane components in a water purification device according to claim 4, characterized in that: The elastic support assembly comprises two elastic telescopic rods (3), the output ends of the elastic telescopic rods (3) are provided with a limiting frame (8) for limiting the position of the third connecting hose (16), and the third connecting hose (16) is placed inside the limiting frame (8).

6. A cleaning system for ultrafiltration membrane components in a water purification device according to claim 4, characterized in that: The anti-blocking component comprises two conical covers (25), the two conical covers (25) are mounted on the inner wall of the moving cylinder (15) on both sides of the partition (22), the narrow end of the conical cover (25) faces the partition (22), a support rod (27) is mounted on the narrow end of the conical cover (25), a rotating shaft (24) is rotatably connected to the center position of the support rod (27), one end of the rotating shaft (24) close to the partition (22) passes through the narrow mouth of the conical cover (25) and is mounted with a fan blade (26), and one end of the rotating shaft (24) away from the partition (22) passes through the filter screen (17) and is mounted with a cleaning rod (23) for cleaning the filter screen (17), and the cleaning rod (23) is closely attached to the filter screen (17).

7. A cleaning system for ultrafiltration membrane components in a water purification device according to claim 6, characterized in that: A guide strip for guiding the cleaning liquid is installed on the inner wall of the conical cover (25).

8. The cleaning system for ultrafiltration membrane components in water purification equipment according to claim 1, characterized in that: A rubber pad is installed on the inner wall of the placement rack (10) for facilitating the placement of the ultrafiltration membrane assembly.

9. The cleaning system for ultrafiltration membrane components in water purification equipment according to claim 3, characterized in that: The side walls at both ends of the connection block (13) are both provided with triangular ribs for stably connecting the connection block (13) with the moving block (20) and the moving cylinder (15).

10. A method for using a cleaning system for an ultrafiltration membrane assembly in a water purification device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: first place the ultrafiltration membrane assembly on the placement rack (10), then connect the first connecting hose (9) to the raw liquid water inlet of the ultrafiltration membrane assembly, connect the second connecting hose (11) to the water outlet and sewage outlet of the ultrafiltration membrane assembly, then add cleaning liquid through the water injection pipe (7) until the cleaning liquid is full, and then close the water injection pipe (7); Step 2: Start the motor (18), the output end of the motor (18) drives the rotating rod (19) to rotate, the rotating rod (19) drives the reciprocating screw (21) to rotate, under the action of the screw thread, the reciprocating screw (21) drives the moving block (20) to move back and forth, the moving block (20) drives the connecting block (13) to move, and the connecting block (13) drives the moving cylinder (15) to move back and forth; When the movable cylinder (15) moves toward the second fixed frame (28), the internal space of the second fixed frame (28) becomes smaller. Under the action of the first one-way valve (5) and the second one-way valve (12), the cleaning liquid enters the movable cylinder (15) through the filter screen (17), thereby filtering impurities through the filter screen (17). Then, the cleaning liquid in the movable cylinder (15) is sequentially transported to the interior of the ultrafiltration membrane assembly through the second water pipe (14), the third connecting hose (16), the third water pipe (29), and the second connecting hose (11), thereby backwashing the ultrafiltration membrane assembly. Then, the ultrafiltration membrane assembly transports the cleaning liquid sequentially through the first connecting hose (9) and the first water pipe (6) to the interior of the first fixed frame (2). When the movable cylinder (15) moves toward the first fixed frame (2), the internal space of the first fixed frame (2) becomes smaller. Under the action of the first one-way valve (5) and the second one-way valve (12), the cleaning liquid enters the movable cylinder (15) through the filter screen (17), thereby filtering impurities through the filter screen (17). Then, the cleaning liquid in the movable cylinder (15) is sequentially transported to the interior of the ultrafiltration membrane assembly through the second water pipe (14), the third connecting hose (16), the first water pipe (6), and the first connecting hose (9), thereby achieving forward flushing cleaning of the ultrafiltration membrane assembly. Then, the ultrafiltration membrane assembly sequentially transports the cleaning liquid to the interior of the second fixed frame (28) through the second connecting hose (11) and the third water pipe (29), thereby achieving reciprocating suction cleaning of the ultrafiltration membrane assembly. Step 3: When the moving cylinder (15) moves, the conical cover (25) moving away from the center position of the support frame (1) collects the cleaning liquid and discharges it through the narrow opening. The discharged cleaning liquid drives the fan blades (26) to rotate, the fan blades (26) drive the rotating shaft (24) to rotate, and the rotating shaft (24) drives the cleaning rod (23) to rotate, so that the cleaning rod (23) cleans the filter screen (17) to prevent impurities from clogging the filter screen (17).

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