An off-line automatic cleaning device for reverse osmosis membrane elements

Abstract

The application relates to the technical field of reverse osmosis membrane cleaning, in particular to an offline automatic cleaning equipment for reverse osmosis membrane elements, which comprises a base and a membrane cylinder, a rotating frame is rotatably arranged above the base, a plurality of cleaning cavities are uniformly arranged on the side walls of the rotating frame, the membrane cylinder is arranged in the cleaning cavities, and a pressure regulating assembly is movably arranged in the cleaning cavities. The reciprocating sliding of the air bag one enables the dirt removal area to continuously extract the cleaning liquid in the membrane cylinder, thereby enhancing the flow of the cleaning liquid in the membrane cylinder, effectively stripping the pollutants attached to the surface of the membrane element, effectively improving the cleaning effect of the membrane cylinder, the reciprocating sliding of the air bag two enables the water inlet area to continuously change the water pressure for cleaning the membrane cylinder, thereby realizing pulse washing of the pollutants in the membrane cylinder, further improving the cleaning effect of the membrane cylinder, and avoiding the problems of damage to the membrane element caused by long-time high-pressure washing and incomplete cleaning caused by long-time low-pressure washing.

Description

Technical Field

[0001] This invention relates to the field of reverse osmosis membrane cleaning technology, and in particular to an offline automatic cleaning device for reverse osmosis membrane elements. Background Technology

[0002] During long-term operation, reverse osmosis membrane elements are prone to clogging by contaminants, leading to decreased flux and reduced desalination rate. Conventional manual cleaning is inefficient and fails to thoroughly remove fouling. Currently available cleaning equipment mostly relies on low-pressure and high-pressure flushing. However, these two methods have significant limitations. Not only is the cleaning process uneven, making it difficult to thoroughly clean the complex internal channels of the membrane element, but they can also cause some damage to the membrane element itself, thus affecting its service life. Especially with high-pressure flushing, while the impact of prolonged high-pressure water flow can remove some stubborn stains, it can also easily cause membrane fiber breakage or irreversible deformation of the support layer. These problems significantly shorten the service life of the membrane element. In addition, during high-pressure flushing, contaminants adhering between membrane elements may be further squeezed and embedded in the support layer, making them difficult to remove effectively. This not only affects the cleaning effect of the membrane element but also leads to contaminant residue, further exacerbating the clogging problem and creating a vicious cycle. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the background art by proposing an offline automatic cleaning device for reverse osmosis membrane elements.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An offline automatic cleaning device for reverse osmosis membrane elements includes a base and a membrane cartridge. A rotating frame is rotatably mounted on the top of the base. Several evenly distributed cleaning chambers are fixedly mounted on the side walls of both sides of the rotating frame. The membrane cartridge is placed inside the cleaning chamber. A pressure regulating component is movably mounted inside the cleaning chamber. The pressure regulating component includes a movable ring, an air bladder one, and an air bladder two. The movable ring, air bladder one, and air bladder two are all slidably mounted inside the cleaning chamber. Support rings are integrally formed on the side walls of both sides of the movable ring. Two support rings are fixedly connected to air bladder one and air bladder two, respectively. Air bladder one and air bladder two are slidably fitted onto the outside of the membrane cartridge.

[0006] One end of the cleaning chamber is slidably connected to an end cap. A sewage discharge assembly is movably installed between the airbag and the end cap. The sewage discharge assembly includes a fixed ring, a rotating ring one, and a rotating ring two. The fixed ring is fixedly installed on the side wall of the airbag one, the rotating ring two is movably installed on the side wall of the end cap, and the rotating ring two is rotatably installed between the fixed ring and the rotating ring one.

[0007] Preferably, a water pipe three is fixedly connected to the side wall of the cleaning chamber away from the end cap, and a spherical groove is opened on the side wall of the cleaning chamber near the water pipe three. A spherical sealing cylinder two is movably installed inside the spherical groove. A central tube is provided inside the membrane cylinder, and the side wall of the central tube near the water pipe three is slidably inserted into the inside of the sealing cylinder two.

[0008] Preferably, the side wall of the end cap is integrally formed with a limiting ring II, and a sealing cylinder I is slidably installed between the limiting ring II and the end cap. The side wall of the central tube near the end cap is slidably inserted into the interior of the sealing cylinder I. Several springs I are arranged in a circular pattern between the limiting ring II and the sealing cylinder I. The sealing cylinder II is connected to the water pipe III.

[0009] Preferably, a water pipe is fixedly connected to the side wall of the cleaning chamber near the end cover, and a water pipe is fixedly connected to the side wall of the cleaning chamber near the water pipe. Both water pipes are equipped with one-way valves. An electric push rod is rotatably mounted on the side wall of the base. A support rod is welded to the side wall of the rotating frame. A connecting block is rotatably mounted on the side wall of the support rod. The side wall of the connecting block is fixedly connected to the output shaft of the electric push rod.

[0010] Preferably, the cleaning chamber has several evenly distributed rotating rods rotatably mounted inside, the rotating rods passing through the movable ring, the side wall of the rotating rods having a bidirectional sliding groove, the side wall of the movable ring having an integrally formed sliding ball, the sliding ball being slidably mounted inside the bidirectional sliding groove, and the side wall of the rotating rods having a fixedly fitted roller, the roller and the rotating ring being in contact with each other.

[0011] Preferably, a drive chamber is provided on the side wall of the cleaning chamber away from the end cover. A gear ring is rotatably installed inside the drive chamber, and an electric motor is fixedly installed inside the drive chamber. Gears are fixedly installed on the side walls of the output shaft and the rotating rod of the electric motor, and the gears mesh with the gear ring.

[0012] Preferably, the sidewall of the rotating ring one is integrally formed with a plurality of evenly distributed spiral strips two, and the sidewall of the fixed ring is integrally formed with a plurality of evenly distributed spiral strips one. The sidewall of the spiral strip one is provided with a spiral groove, the spiral strip two corresponds to the spiral groove one and is slidably installed inside the spiral groove, the spiral strip one is slidably installed on the outside of the membrane tube, and the spiral strip two is rotatably installed on the outside of the membrane tube.

[0013] Preferably, a limiting ring is integrally formed on the side wall of the cleaning chamber near the end cap, and the rotating ring is movably installed between the limiting ring and the end cap. The inner side of the rotating ring has a plurality of evenly distributed protrusions integrally formed, the protrusions abutting against the spiral strip. The number of the spiral strip is odd, the number of the protrusions is even, and the number of the spiral strip is a non-integer multiple of the number of the protrusions. The side wall of the protrusions near the rotating ring has an integrally formed side plate.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows:

[0015] 1. By the reciprocating sliding of the airbag, the cleaning fluid inside the membrane tube is continuously extracted by the sewage discharge zone, thereby enhancing the flow of the cleaning fluid inside the membrane tube, effectively removing contaminants adhering to the surface of the membrane elements inside the membrane tube, and effectively improving the cleaning effect of the membrane tube.

[0016] 2. By reciprocating the sliding of the second airbag, the water pressure in the inlet area for cleaning the membrane cylinder is continuously changed, thereby achieving pulse flushing of pollutants inside the membrane cylinder, further improving the cleaning effect of the membrane cylinder, and avoiding the problems of damage to the membrane elements inside the membrane cylinder by prolonged high-pressure flushing and incomplete cleaning by prolonged low-pressure flushing.

[0017] 3. By agitating the wastewater through the side plates, the wastewater forms a swirling flow in the same direction as the membrane element winding, which effectively promotes the spiral flow of pollutants in the membrane tube along the winding gap of the membrane element, enhances the fluidity of the wastewater, accelerates the wastewater discharge speed, and effectively prevents pollutant deposition.

[0018] 4. Through the swirling sewage and the cooperation of spiral strip one and spiral strip two, the dirt on the side wall of the membrane tube moves towards the end cap and is discharged from the cleaning chamber with the swirling sewage after leaving the membrane tube, improving sewage discharge efficiency and thorough cleaning, achieving efficient sludge discharge while avoiding secondary pollution.

[0019] 5. The convex teeth continuously abut against the spiral strip, causing the membrane tube near the sealing cylinder to vibrate during low-pressure rinsing, effectively loosening the dirt adhering to the surface of the membrane element and further improving the cleaning effect of the membrane tube. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention in its working state;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention in the loading state;

[0022] Figure 3 This is a schematic diagram of the structure of the base and rotating frame in this invention;

[0023] Figure 4This is a cross-sectional view of the internal structure of the cleaning chamber in this invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A;

[0025] Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B;

[0026] Figure 7 This is a cross-sectional view of the cleaning chamber in this invention;

[0027] Figure 8 This is a schematic diagram of the structure of the pressure regulating component and the sewage discharge component in this invention;

[0028] Figure 9 This is a schematic diagram of the structure of the rotating rod and the second rotating ring in this invention;

[0029] Figure 10 This is a schematic diagram of the voltage regulating component in this invention;

[0030] Figure 11 This is a schematic diagram of the structure of the fixed ring and the rotating ring in this invention;

[0031] Figure 12 This is a schematic diagram of the structure of sealing cylinder one and sealing cylinder two in this invention.

[0032] In the diagram: 1. Base; 11. Electric actuator; 12. Rotating frame; 121. Support rod; 122. Connecting block; 123. Water pipe one; 124. Water pipe two; 125. Water pipe three; 126. One-way valve; 13. Cleaning chamber; 131. End cap; 132. Limiting ring one; 133. Limiting ring two; 134. Sealing cylinder one; 135. Spring one; 136. Drive chamber; 137. Spherical groove; 138. Sealing cylinder two; 21. Movable ring; 2 11. Airbag 1; 212. Airbag 2; 213. Support ring; 214. Sliding ball; 22. Rotating rod; 221. Bidirectional sliding groove; 222. Roller; 223. Motor; 224. Gear ring; 225. Gear; 31. Fixed ring; 311. Spiral strip 1; 312. Rotating ring 1; 313. Spiral strip 2; 314. Spiral groove; 32. Membrane tube; 321. Central tube; 322. Rotating ring 2; 323. Side plate; 324. Convex tooth. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Reference Figure 1 - Figure 12 As shown, an offline automatic cleaning device for reverse osmosis membrane elements includes a base 1 and a membrane cartridge 32. A rotating frame 12 is rotatably mounted on the top of the base 1. Several evenly distributed cleaning chambers 13 are fixedly mounted on the side walls on both sides of the rotating frame 12. The membrane cartridge 32 is placed inside the cleaning chamber 13. A pressure regulating component is movably mounted inside the cleaning chamber 13. The pressure regulating component includes a movable ring 21, an air bag 1 211, and an air bag 212. The movable ring 21, air bag 1 211, and air bag 212 are all slidably mounted inside the cleaning chamber 13. Support rings 213 are integrally formed on the side walls on both sides of the movable ring 21. The two support rings 213 are fixedly connected to air bag 1 211 and air bag 212 respectively. Air bag 1 211 and air bag 212 are slidably fitted onto the outside of the membrane cartridge 32.

[0036] One end of the cleaning chamber 13 is slidably connected to an end cap 131. A sewage discharge assembly is movably installed between the airbag 211 and the end cap 131. The sewage discharge assembly includes a fixed ring 31, a rotating ring 312 and a rotating ring 322. The fixed ring 31 is fixedly installed on the side wall of the airbag 211, and the rotating ring 322 is movably installed on the side wall of the end cap 131. The rotating ring 322 is rotatably installed between the fixed ring 31 and the rotating ring 312.

[0037] Among them, airbag 1 211 is located inside the cleaning chamber 13 on the side close to the end cap 131, and airbag 2 212 is located inside the cleaning chamber 13 on the side away from the end cap 131. Airbag 1 211 and airbag 2 212 are in contact with the inside of the cleaning chamber 13 and the membrane tube 32, so that the cleaning chamber 13 is divided into three areas: the sewage area between airbag 1 211 and the end cap 131, the sealing area between airbag 1 211 and airbag 2 212, and the water inlet area between airbag 2 212 and the side wall of the cleaning chamber 13. A locking structure is provided between the end cap 131 and the cleaning chamber 13. During the cleaning process of the membrane tube 32, the locking structure locks the end cap 131 to the side wall of the cleaning chamber 13.

[0038] like Figures 1-7As shown, a water pipe 123 is fixedly connected to the side wall of the cleaning chamber 13 near the end cover 131, and a water pipe 124 is fixedly connected to the side wall of the cleaning chamber 13 near the water pipe 125. Both the water pipe 123 and the water pipe 124 are equipped with a one-way valve 126. An electric push rod 11 is rotatably mounted on the side wall of the base 1. A support rod 121 is welded to the side wall of the rotating frame 12. A connecting block 122 is rotatably mounted on the side wall of the support rod 121. The side wall of the connecting block 122 is fixedly connected to the output shaft of the electric push rod 11.

[0039] Water pipe 123 is fixedly connected to the external sewage tank, water pipe 224 is fixedly connected to the water pump inside the external cleaning fluid storage chamber, and water pipe 325 is fixedly connected to the external pure water tank. When cleaning the membrane cylinder 32, the electric push rod 11 is activated and pulls the support rod 121 through the connecting block 122, causing the rotating frame 12 to rotate. When the cleaning chamber 13 is vertical, the electric push rod 11 is closed. At this time, the water pump is activated, and the cleaning fluid inside the cleaning fluid storage chamber enters the interior of the cleaning chamber 13 through water pipe 224. After cleaning, the electric push rod 11 is activated and pushes the support rod 121 through the connecting block 122, causing the rotating frame 12 to return to its original position. When the cleaning chamber 13 is horizontal, the electric push rod 11 is closed. At this time, the worker opens the end cover 131 and takes out the membrane cylinder 32 inside the cleaning chamber 13.

[0040] like Figures 4-10 As shown, several evenly distributed rotating rods 22 are rotatably mounted inside the cleaning chamber 13. The rotating rods 22 pass through the movable ring 21. A bidirectional sliding groove 221 is opened on the side wall of the rotating rod 22. A sliding ball 214 is integrally formed on the side wall of the movable ring 21. The sliding ball 214 is slidably mounted inside the bidirectional sliding groove 221. A roller 222 is fixedly fitted on the side wall of the rotating rod 22. The roller 222 and the rotating ring 222 abut against each other. A drive chamber 136 is opened on the side wall of the cleaning chamber 13 away from the end cover 131. A gear ring 224 is rotatably mounted inside the drive chamber 136. A motor 223 is fixedly mounted inside the drive chamber 136. Gears 225 are fixedly mounted on the output shaft of the motor 223 and the side wall of the rotating rod 22. The gears 225 and the gear ring 224 mesh with each other.

[0041] During the cleaning process of the membrane cylinder 32, the motor 223 starts and drives the rotating rod 22 to rotate via the gear 225 and gear ring 224. The rotating rod 22 drives the movable ring 21 to slide back and forth via the bidirectional sliding groove 221 and the sliding ball 214. This causes the movable ring 21 to drive the first airbag 211 and the second airbag 212 to slide back and forth. When the movable ring 21 slides towards the third water pipe 125, the pressure in the inlet area increases (when the pressure inside the second water pipe 124 is greater than the pressure in the inlet area, the one-way valve 126 inside the second water pipe 124 opens; when the pressure inside the second water pipe 124 is less than the pressure in the inlet area, the one-way valve 126 inside the second water pipe 124 closes). This increases the water pressure in the inlet area for cleaning the membrane cylinder 32 and decreases the pressure in the discharge area. At this time, the one-way valve 126 inside water pipe 123 is closed to prevent sewage backflow, allowing the cleaning fluid inside membrane cylinder 32 to be drawn out of the sewage discharge area. Through the reciprocating sliding of airbag 211, the sewage discharge area continuously draws out the cleaning fluid inside membrane cylinder 32, thereby enhancing the flow of the cleaning fluid inside membrane cylinder 32, effectively removing contaminants adhering to the surface of the membrane element inside membrane cylinder 32, and effectively improving the cleaning effect of membrane cylinder 32. Through the reciprocating sliding of airbag 212, the water pressure for cleaning membrane cylinder 32 in the water inlet area is continuously changed, thereby realizing pulse flushing of contaminants inside membrane cylinder 32, further improving the cleaning effect of membrane cylinder 32, and avoiding the problems of damage to the membrane element inside membrane cylinder 32 by prolonged high-pressure flushing and incomplete cleaning by prolonged low-pressure flushing.

[0042] like Figure 5 , Figure 7 , Figure 8 and Figure 11 As shown, the sidewall of the rotating ring 312 is integrally formed with several evenly distributed spiral strips 313, and the sidewall of the fixed ring 31 is integrally formed with several evenly distributed spiral strips 311. The sidewall of the spiral strips 311 is provided with spiral grooves 314. The spiral strips 313 and spiral grooves 314 correspond one-to-one and are slidably installed inside the spiral grooves 314. The spiral strips 311 are slidably installed on the outside of the membrane cylinder 32, and the spiral strips 313 are rotatably installed on the outside of the membrane cylinder 32.

[0043] like Figure 5 , Figure 8 and Figure 9 As shown, a limiting ring 132 is integrally formed on the side wall of the cleaning chamber 13 near the end cover 131. A rotating ring 312 is movably installed between the limiting ring 132 and the end cover 131. Several evenly distributed protrusions 324 are integrally formed on the inner side of the rotating ring 322. The protrusions 324 abut against the spiral strip 311. The number of spiral strips 311 is odd, and the number of protrusions 324 is even. The number of spiral strips 311 is a non-integer multiple of the number of protrusions 324. A side plate 323 is integrally formed on the side wall of the protrusions 324 near the rotating ring 312.

[0044] During the rotation of the rotating rod 22, the rotating rod 22 drives the roller 222 to rotate, which in turn drives the rotating ring 322 to rotate. The rotating ring 322 drives the side plate 323 and the tooth 324 to rotate. After the airbag 211 moves away from the end cap 131, when the spiral strip 311 moves away from the rotating ring 322, the side plate 323 and the tooth 324 agitate the sewage inside the sewage zone, causing the sewage inside the sewage zone to form a swirling flow. The direction of the sewage swirling flow is the same as the winding direction of the membrane element in the membrane cylinder 32. Through the agitation of the sewage by the side plate 323, the sewage forms a swirling flow in the same direction as the winding direction of the membrane element in the membrane cylinder 32. The swirling flow effectively promotes the spiral flow of pollutants in the membrane cylinder 32 along the winding gap of the membrane element, enhances the fluidity of the sewage, accelerates the sewage discharge speed, and effectively prevents pollutant deposition. At the same time, the spiral direction of the first spiral strip 311 and the second spiral strip 313 is opposite to the spiral direction of the sewage. When the internal dirt of the sewage adheres to the side wall of the membrane cylinder 32, the cooperation between the swirling sewage and the first spiral strip 311 and the second spiral strip 313 causes the dirt on the side wall of the membrane cylinder 32 to move towards the end cap 131. After detaching from the membrane cylinder 32, it is discharged from the cleaning chamber 13 with the swirling sewage, improving the sewage discharge efficiency and cleaning thoroughness, achieving efficient sludge discharge while avoiding secondary pollution.

[0045] like Figures 4-8 and Figure 12 As shown, a water pipe 125 is fixedly connected to the side wall of the cleaning chamber 13 away from the end cap 131. A spherical groove 137 is opened on the side wall of the cleaning chamber 13 near the water pipe 125. A spherical sealing cylinder 138 is movably installed inside the spherical groove 137. A central tube 321 is provided inside the membrane cylinder 32. The side wall of the central tube 321 near the water pipe 125 is slidably inserted into the inside of the sealing cylinder 138. A limiting ring 133 is integrally formed on the side wall of the end cap 131. A sealing cylinder 134 is slidably installed between the limiting ring 133 and the end cap 131. The side wall of the central tube 321 near the end cap 131 is slidably inserted into the inside of the sealing cylinder 134. Several springs 135 are arranged in a circular pattern between the limiting ring 133 and the sealing cylinder 134. The sealing cylinder 138 and the water pipe 125 are connected.

[0046] In this process, after the airbag 211 moves towards the end cap 131, when the spiral strip 311 approaches the rotating ring 322, the protruding teeth 324 continuously abut against the spiral strip 311 (there are 4 protruding teeth 324 and 9 spiral strips 311; during the rotation of the spiral ring 322, only one protruding tooth 324 and one spiral strip 311 abut against each other at any given time). This causes the protruding teeth 324 to push the membrane cylinder 32 through the spiral strip 311 and the spiral strip 313. After the protruding teeth 324 slide past the spiral strip 311, the sealing cylinder 134 is released by the spring. 135 drives the membrane cylinder 32 and the rotating ring 312 to return to their original positions. At this time, the sealing cylinder 134 and the rotating ring 312 slide back and forth inside the limiting ring 133 and the limiting ring 132, respectively. This causes the membrane cylinder 32 to swing on the side closer to the sealing cylinder 138 and vibrate on the side closer to the sealing cylinder 134. The convex teeth 324 continuously abut against the spiral strip 311, so that when the membrane cylinder 32 is rinsed at low pressure, the membrane cylinder 32 on the side closer to the sealing cylinder 134 vibrates, effectively loosening the dirt attached to the surface of the membrane element and further improving the cleaning effect of the membrane cylinder 32.

[0047] The working principle and usage of this invention are explained in detail below: The worker unlocks the locking structure between the end cap 131 and the cleaning chamber 13. After removing the end cap 131, the membrane tube 32 to be cleaned is placed into the cleaning chamber 13. At this time, the central tube 321 of the membrane tube 32 near the water pipe 125 is inserted into the sealing cylinder 138. After the worker places the end cap 131 into the cleaning chamber 13, the locking structure locks the end cap 131 and the cleaning chamber 13. At this time, the central tube 321 of the membrane tube 32 near the end cap 131 is inserted into the sealing cylinder 134. The electric actuator 11 is activated and pulls the support rod 121 through the connecting block 122, causing the rotating frame 12 to rotate. When the cleaning chamber 13 is vertical, the electric actuator 11 is deactivated. When the system is closed, the water pump starts, and the cleaning fluid enters the cleaning chamber 13 through water pipe 2 124 to clean the membrane cylinder 32. During the cleaning process, the motor 223 starts and drives the rotating rod 22 to rotate. The rotating rod 22 drives the movable ring 21 to slide back and forth, causing the movable ring 21 to drive the airbag 1 211 and airbag 212 to slide back and forth. When the movable ring 21 slides towards water pipe 3 125, the pressure in the inlet area increases, increasing the water pressure on the membrane cylinder 32 during cleaning, while the pressure in the drain area decreases. At this time, the one-way valve 126 inside water pipe 1 123 closes to prevent sewage backflow, allowing the cleaning fluid inside the membrane cylinder 32 to be drawn out of the drain area. Through the reciprocating sliding of airbag 1 211, the cleaning fluid in the drain area is then used to clean the membrane cylinder 32. 2. The internal cleaning fluid is continuously extracted, thereby enhancing the flow of the cleaning fluid inside the membrane cylinder 32, effectively removing contaminants adhering to the surface of the membrane elements inside the membrane cylinder 32, and effectively improving the cleaning effect of the membrane cylinder 32. Through the reciprocating sliding of the second airbag 212, the water pressure for cleaning the membrane cylinder 32 in the inlet area is continuously changed, thereby realizing pulse flushing of contaminants inside the membrane cylinder 32, further improving the cleaning effect of the membrane cylinder 32, avoiding the problems of damage to the membrane elements inside the membrane cylinder 32 by prolonged high-pressure flushing and incomplete cleaning by prolonged low-pressure flushing. During the rotation of the rotating rod 22, the rotating rod 22 drives the second rotating ring 322 to rotate through the roller 222. The second rotating ring 322 drives the side plate 323 and the tooth 324 to rotate. When the first spiral strip 311 moves away from the second rotating ring 322, the side plate 323 and the protruding teeth 324 agitate the sewage inside the sewage zone, causing the sewage inside the sewage zone to form a swirling flow. The direction of the sewage swirling flow is the same as the winding direction of the membrane element in the membrane cylinder 32. Through the agitation of the sewage by the side plate 323, the sewage forms a swirling flow in the same direction as the winding direction of the membrane element in the membrane cylinder 32, effectively promoting the spiral flow of pollutants in the membrane cylinder 32 along the winding gap of the membrane element, enhancing the fluidity of the sewage, accelerating the sewage discharge speed, and effectively preventing pollutant deposition. At the same time, the rotation direction of the first spiral strip 311 and the second spiral strip 313 is opposite to the rotation direction of the sewage swirling flow. When the dirt inside the sewage adheres to the side wall of the membrane cylinder 32, through the interaction of the swirling sewage with the first spiral strip 311 and the second spiral strip 313,This causes the dirt on the side wall of the membrane cylinder 32 to move towards the end cap 131, and after detaching from the membrane cylinder 32, it is discharged from the cleaning chamber 13 with the swirling flow of sewage, improving sewage discharge efficiency and thorough cleaning, achieving efficient sludge removal while avoiding secondary pollution. When the first spiral strip 311 approaches the second rotating ring 322, the protruding teeth 324 continuously abut against the first spiral strip 311, causing the protruding teeth 324 to push the membrane cylinder 32 through the first spiral strip 311 and the second spiral strip 313. After the protruding teeth 324 slide past the first spiral strip 311, the sealing cylinder 134 drives the membrane cylinder 32 and the first rotating ring 312 to return to their original positions, causing the membrane cylinder 32 to approach the sealing cylinder 138. One side swings, and the side near the sealing cylinder 134 vibrates. The teeth 324 continuously abut against the spiral strip 311, causing the membrane cylinder 32 near the sealing cylinder 134 to vibrate during low-pressure rinsing. This effectively loosens dirt adhering to the membrane element surface, further improving the cleaning effect. After cleaning, the electric actuator 11 is activated and pushes the support rod 121 through the connecting block 122, causing the rotating frame 12 to return to its original position. When the cleaning chamber 13 is horizontal, the electric actuator 11 closes, and the worker opens the end cover 131 and removes the membrane cylinder 32 from inside the cleaning chamber 13.

[0048] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An off-line automatic cleaning apparatus for reverse osmosis membrane elements, comprising a base (1) and a membrane cartridge (32), characterized in that: The upper rotary installation of the base (1) has a rotary frame (12), the side wall of both sides of the rotary frame (12) is fixedly installed with several evenly distributed cleaning cavities (13), the membrane cylinder (32) is placed in the inside of the cleaning cavity (13), the inside of the cleaning cavity (13) movably installs a pressure regulating assembly, the pressure regulating assembly includes a movable ring (21), a gas bag (211) and a gas bag (212), the movable ring (21), the gas bag (211) and the gas bag (212) are all slidingly installed in the inside of the cleaning cavity (13), the side wall of both sides of the movable ring (21) is integrally formed with a support ring (213), the two support rings (213) are respectively fixedly connected with the gas bag (211) and the gas bag (212), the gas bag (211) and the gas bag (212) are slidingly sleeved on the outside of the membrane cylinder (32); One end of the cleaning cavity (13) is slidingly connected with an end cover (131), a pollution discharge assembly is movably installed between the gas bag (211) and the end cover (131), the pollution discharge assembly includes a fixed ring (31), a rotating ring (312) and a rotating ring (322), the fixed ring (31) is fixedly installed on the side wall of the gas bag (211), the rotating ring (322) is movably installed on the side wall of the end cover (131), and the rotating ring (322) is rotatably installed between the fixed ring (31) and the rotating ring (312); The side wall of the cleaning cavity (13) is fixedly connected with a water pipe (123) near the end cover (131), the side wall of the cleaning cavity (13) is fixedly connected with a water pipe (124) near the water pipe (125), the inside of the water pipe (123) and the water pipe (124) is provided with a check valve (126), the side wall of the base (1) is rotatably installed with an electric push rod (11), the side wall of the rotary frame (12) is welded with a support rod (121), the side wall of the support rod (121) is rotatably installed with a connecting block (122), and the side wall of the connecting block (122) is fixedly connected with the output shaft of the electric push rod (11); A plurality of evenly distributed rotating rods (22) are rotatably installed in the inside of the cleaning cavity (13), the rotating rod (22) penetrates the movable ring (21), the side wall of the rotating rod (22) is provided with a bidirectional sliding groove (221), the side wall of the movable ring (21) is integrally formed with a sliding ball (214), the sliding ball (214) is slidingly installed in the inside of the bidirectional sliding groove (221), the side wall of the rotating rod (22) is fixedly sleeved with a roller (222), and the roller (222) abuts against the rotating ring (322); The side wall of the cleaning cavity (13) is provided with a driving cavity (136) away from the end cover (131), a gear ring (224) is rotatably installed in the inside of the driving cavity (136), an electric motor (223) is fixedly installed in the inside of the driving cavity (136), the output shaft of the electric motor (223) and the side wall of the rotating rod (22) are fixedly installed with a gear (225), and the gear (225) and the gear ring (224) are meshed. The side wall of the rotating ring one (312) is integrally formed with a plurality of spiral strips two (313) uniformly distributed, the side wall of the fixed ring (31) is integrally formed with a plurality of spiral strips one (311) uniformly distributed, the side wall of the spiral strip one (311) is provided with a spiral groove (314), the spiral strip two (313) and the spiral groove (314) are one-to-one corresponding and are slidably installed in the inside of the spiral groove (314), the spiral strip one (311) is slidably installed on the outside of the membrane cylinder (32), and the spiral strip two (313) is rotatably installed on the outside of the membrane cylinder (32). The side wall of the cleaning cavity (13) near the one side of the end cover (131) is integrally formed with a limiting ring one (132), the rotating ring two (322) is movably installed between the limiting ring one (132) and the end cover (131), the inside of the rotating ring two (322) is integrally formed with a plurality of protruding teeth (324) uniformly distributed, the protruding teeth (324) abut against the spiral strip one (311), the number of the spiral strip one (311) is odd, the number of the protruding teeth (324) is even, the number of the spiral strip one (311) is a non-integer multiple of the number of the protruding teeth (324), and the side wall of the protruding teeth (324) near the one side of the rotating ring one (312) is integrally formed with a side plate (323). When the membrane cylinder (32) is cleaned, the electric push rod (11) is started and pulls the supporting rod (121) through the connecting block (122), so that the rotating frame (12) rotates, when the cleaning cavity (13) is in a vertical state, the electric push rod (11) is turned off, at this time, the water pump is started, the cleaning liquid in the cleaning liquid storage cavity enters the inside of the cleaning cavity (13) through the water pipe two (124), after the cleaning is completed, the electric push rod (11) is started and pushes the supporting rod (121) through the connecting block (122), so that the rotating frame (12) resets, when the cleaning cavity (13) is in a horizontal state, the electric push rod (11) is turned off, at this time, the worker opens the end cover (131) and takes out the membrane cylinder (32) in the cleaning cavity (13).

2. The off-line automatic cleaning apparatus for reverse osmosis membrane elements according to claim 1, characterized in that: The side wall, away from the one side of the end cover (131), of the cleaning cavity (13) is fixedly connected with a water pipe three (125), the side wall, near the one side of the water pipe three (125), of the cleaning cavity (13) is provided with a spherical groove (137), the inside of the spherical groove (137) movably installs a spherical sealing cylinder two (138), the inside of the membrane cylinder (32) is provided with a center pipe (321), and the side wall, near the one side of the water pipe three (125), of the center pipe (321) is slidably inserted into the inside of the sealing cylinder two (138).

3. The off-line automatic cleaning apparatus for reverse osmosis membrane elements according to claim 2, characterized in that: The side wall of the end cover (131) is integrally formed with a limiting ring two (133), the sealing cylinder one (134) is slidably installed between the limiting ring two (133) and the end cover (131), the side wall, near the one side of the end cover (131), of the center pipe (321) is slidably inserted into the inside of the sealing cylinder one (134), a plurality of circumferentially distributed spring ones (135) are arranged between the limiting ring two (133) and the sealing cylinder one (134), and the sealing cylinder two (138) and the water pipe three (125) are communicated.

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