Reverse osmosis membrane cleaning device capable of switching and conducting in opposite directions

Abstract

The invention relates to the technical field of reverse osmosis membrane cleaning, and discloses a reverse osmosis membrane cleaning device capable of switching conduction in opposite directions. The flow volume of the concentrated water is detected through the detection piece, so that when a certain amount of the concentrated water is discharged, the first flow dividing selection piece and the second flow dividing selection piece change the flow path of the concentrated water in the first flow dividing selection piece and the second flow dividing selection piece; the cleaning route of the concentrated water on the reverse osmosis membrane element is switched between the forward circulation of the reverse osmosis membrane element and the reverse circulation of the reverse osmosis membrane element in a reciprocating manner, so that the entering directions of the concentrated water at the two ends of the reverse osmosis membrane element are controlled in real time by utilizing the circulation amount of the water; the reverse osmosis membrane element is subjected to reciprocating pressure cleaning in the opposite direction through concentrated water, the cleaning quality of the cleaning device is improved, the time for cleaning the reverse osmosis membrane element through the concentrated water in one direction is controlled through the circulation amount of water, and the cleaning efficiency of the cleaning device on the reverse osmosis membrane element is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reverse osmosis membrane cleaning, and particularly to a reverse osmosis membrane cleaning device capable of switching conduction in opposite directions. Background Art

[0002] A reverse osmosis membrane is an artificial semi-permeable membrane with certain characteristics made by simulating a biological semi-permeable membrane, and is the core component of reverse osmosis technology. The reverse osmosis membrane needs to be cleaned after being used for a period of time to ensure the treatment quality of the reverse osmosis membrane.

[0003] In the existing reverse osmosis membrane cleaning devices, such as Chinese Patent Application CN118512908A, a third pipeline is provided between the second pipeline and the chemical agent container, and a first valve capable of adjusting the opening degree is provided on the third pipeline. By adjusting the opening degree of the first valve, the liquid pressure received by the reverse osmosis membrane element can be adjusted, which is beneficial to reducing the risk of damaging the reverse osmosis membrane element due to excessive pressure, and is beneficial to improving the cleaning effect and cleaning efficiency.

[0004] However, there are still the following problems: After cleaning the reverse osmosis membrane element with pressured water, if pollutants adhere to the permeation pores, the pollutants may not be effectively removed only by one-way pressured water cleaning, resulting in a reduction in the cleaning quality of the cleaning device. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, which has the advantages of using the water flow rate to control the entry direction of concentrated water at both ends of the reverse osmosis membrane element in real time, enabling the concentrated water to perform reciprocating pressure cleaning on the reverse osmosis membrane element from the opposite direction, improving the cleaning quality of the cleaning device, improving the cleaning degree of pollutants retained in the reverse osmosis pores, and using the water flow rate to control the cleaning time of the concentrated water on the reverse osmosis membrane element from one direction, avoiding waste of cleaning time while ensuring the cleaning effect, and improving the cleaning efficiency of the cleaning device for the reverse osmosis membrane element. It solves the problem that after cleaning the reverse osmosis membrane element with pressured water, if pollutants adhere to the permeation pores, the pollutants may not be effectively removed only by one-way pressured water cleaning, resulting in a reduction in the cleaning quality of the cleaning device.

[0006] To achieve the above object, the present invention provides the following technical solution: A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, comprising a frame body, a cleaning mechanism arranged on the frame body, and a commutation mechanism arranged on the cleaning mechanism. The cleaning mechanism includes a reverse osmosis membrane element. A plurality of the reverse osmosis membrane elements are arranged on the frame body, and both ends of the reverse osmosis membrane element are communicated with the inlet and outlet of concentrated water; The commutation mechanism includes a first shunt selector, a second shunt selector, and a detector. The first shunt selector is disposed beside one end of the reverse osmosis membrane element, the second shunt selector is disposed beside the other end of the reverse osmosis membrane element, and the detector is disposed on the discharge route of the concentrated water. The detector detects the flow rate of the concentrated water, so that when a certain amount of concentrated water is discharged, the flow route of the concentrated water is switched between the first shunt selector, one end of the reverse osmosis membrane element, the other end of the reverse osmosis membrane element, the second shunt selector and the first shunt selector, the other end of the reverse osmosis membrane element, one end of the reverse osmosis membrane element, and the second shunt selector.

[0007] Preferably, the cleaning mechanism further includes a concentrated water tank. The concentrated water tank is fixedly disposed beside the frame body and is used for storing the concentrated water. A cleaning pump is fixedly installed on one side of the frame body. A pump inlet pipe is disposed between the cleaning pump and the concentrated water tank. One end of the pump inlet pipe is communicated with the bottom end of the concentrated water tank, and the other end of the pump inlet pipe is communicated with the water inlet end of the cleaning pump.

[0008] Preferably, a filter is fixedly installed on the other side of the frame body. A pump outlet pipe is disposed between the filter and the cleaning pump. One end of the pump outlet pipe is communicated with the water outlet end of the cleaning pump, and the other end of the pump outlet pipe is communicated with the top end of the filter. The pump outlet pipe is located below the reverse osmosis membrane element and on one side of the frame body. A concentrated water inlet pipe is fixedly installed at the bottom end of the filter. One end of the concentrated water inlet pipe is communicated with the bottom end of the filter, and the other end of the concentrated water inlet pipe extends to one side of the frame body. The concentrated water inlet pipe is located on the other side of the frame body and below the reverse osmosis membrane element.

[0009] Preferably, a booster pump is fixedly installed on one side of the frame body. The booster pump is adjacent to the cleaning pump. The water inlet end of the booster pump is communicated with the other end of the concentrated water inlet pipe, and the water outlet end of the booster pump is communicated with the first shunt selector. A side pipe is fixedly disposed beside the booster pump. One end of the side pipe is communicated with the other end of the concentrated water inlet pipe, and the other end of the side pipe is communicated with the first shunt selector. A first connecting pipe is fixedly disposed on one side of the frame body. One end of the first connecting pipe is communicated with the first shunt selector, and the other end of the first connecting pipe is provided with a plurality of pipe orifices. Each pipe orifice of the first connecting pipe is fixedly connected to one end of each reverse osmosis membrane element, and the pipe orifices of the first connecting pipe are all communicated with the reverse osmosis membrane element.

[0010] Preferably, a second connecting pipe is fixedly installed on the other side of the frame body. One end of the second connecting pipe is provided with a plurality of pipe orifices. Each pipe orifice of the second connecting pipe is fixedly connected to the other end of each reverse osmosis membrane element. The pipe orifices of the second connecting pipe are all communicated with the reverse osmosis membrane element. A concentrated water outlet pipe is fixedly installed on the other end of the second connecting pipe. One end of the concentrated water outlet pipe is communicated with the other end of the second connecting pipe. The concentrated water outlet pipe is located above the frame body.

[0011] Preferably, the other end of the concentrated water outlet pipe is communicated with the second flow dividing and selecting member. The second flow dividing and selecting member is adjacent to the detecting member and communicated with the detecting member. A return pipe is arranged between the detecting member and the concentrated water tank. One end of the return pipe is communicated with the detecting member, and the other end of the return pipe is communicated with the top end of the concentrated water tank.

[0012] Preferably, the commutation mechanism further includes a first water supply pipe. The first water supply pipe is arranged between the first flow dividing and selecting member and the second connecting pipe. One end of the first water supply pipe is communicated with the first flow dividing and selecting member, and the other end of the first water supply pipe is communicated with the second connecting pipe. The first water supply pipe is located above the frame body. A first central shaft is rotatably fitted in the first flow dividing and selecting member. The first central shaft is adjacent to the communication part of the first flow dividing and selecting member and the first water supply pipe, and is adjacent to the communication part of the first flow dividing and selecting member and the first connecting pipe. A first valve plate is fixedly installed on the first central shaft. The size of the first valve plate is adapted to the cross-sectional area size inside the first flow dividing and selecting member. A first servo motor is fixedly installed on the first flow dividing and selecting member. The first servo motor is power-connected to the first central shaft.

[0013] Preferably, a second water supply pipe is arranged between the second flow dividing and selecting member and the first connecting pipe. One end of the second water supply pipe is communicated with the second flow dividing and selecting member, and the other end of the second water supply pipe is communicated with the first connecting pipe. A second central shaft is rotatably fitted in the second flow dividing and selecting member. The second central shaft is adjacent to the communication part of the second flow dividing and selecting member and the second water supply pipe, and is adjacent to the communication part of the second flow dividing and selecting member and the concentrated water outlet pipe. A second valve plate is fixedly installed on the second central shaft. The size of the second valve plate is adapted to the cross-sectional area size inside the second flow dividing and selecting member. A second servo motor is fixedly installed on the second flow dividing and selecting member. The second servo motor is power-connected to the second central shaft.

[0014] Preferably, an impeller is rotatably fitted inside the detection member. The size of the impeller is adapted to the size inside the detection member. A wheel speed detector is fixedly installed on the detection member, and the detection end of the wheel speed detector is in power connection with the impeller, so that the wheel speed detector detects the number of rotations of the impeller.

[0015] Preferably, the wheel speed detector is in signal connection with the first servo motor and the second servo motor, so that the wheel speed detector controls the operation of the first servo motor and the second servo motor.

[0016] Compared with the prior art, the present invention provides a reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, having the following beneficial effects: 1. For the reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, the detection member detects the flow rate of the concentrated water. When a certain amount of concentrated water is discharged, the detection member controls the first flow diversion selector and the second flow diversion selector to change the flow route of the concentrated water therein, so that the cleaning route of the concentrated water to the reverse osmosis membrane element reciprocally switches between the forward flow and the reverse flow in the reverse osmosis membrane element, thereby using the real-time control of the water flow rate to control the entry direction of the concentrated water at both ends of the reverse osmosis membrane element, enabling the concentrated water to perform reciprocating pressure cleaning on the reverse osmosis membrane element from opposite directions, improving the cleaning quality of the cleaning device, enhancing the cleaning degree of the pollutants retained in the reverse osmosis pores, and using the water flow rate to control the cleaning time of the concentrated water on the reverse osmosis membrane element from one direction, avoiding the waste of cleaning time while ensuring the cleaning effect, and improving the cleaning efficiency of the cleaning device for the reverse osmosis membrane element.

[0017] 2. For the reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, through the arrangement of the side pipe, the side pipe assists in changing the flow rate when pressurizing the concentrated water, so that the surplus water flow rate in the concentrated water inlet pipe passes through the side pipe, thereby eliminating the reduction of the water flow rate during the treatment of the concentrated water by the booster pump from the side, improving the stability of the flow rate at each position on the flow route of the concentrated water, and thus maintaining the stability of the impeller speed when the concentrated water flow drives the impeller, thereby improving the detection accuracy of the wheel speed detector for the number of rotations of the impeller (i.e., the water flow rate) from the side.

[0018] 3. For the reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, through the arrangement of the manual control valves on each pipeline, the connection between each pipeline is more convenient for disassembly, facilitating the maintenance of the cleaning device, and making the parts on the cleaning device easy to replace, reducing the maintenance cost of the device from the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the cleaning device of the present invention; Figure 2 It is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 3 Schematic diagram of the structure distribution at the concentrated water tank of the present invention; Figure 4 Bottom view schematic diagram of the structure at the first connecting pipe of the present invention; Figure 5 Top view schematic diagram of the structure at the reverse osmosis membrane element of the present invention; Figure 6 Schematic diagram of the structure of the commutation mechanism of the present invention; Figure 7 Schematic diagram of the internal structure distribution of the first flow splitting and selecting member of the present invention; Figure 8 Schematic diagram of the internal structure distribution of the second flow splitting and selecting member of the present invention; Figure 9 Schematic diagram of the internal structure distribution of the detecting member of the present invention.

[0020] In the figure: 1, frame body; 2, cleaning mechanism; 21, concentrated water tank; 22, cleaning pump; 23, pump inlet pipe; 24, filter; 25, pump outlet pipe; 26, concentrated water inlet pipe; 27, booster pump; 28, side pipe; 29, first connecting pipe; 210, reverse osmosis membrane element; 211, second connecting pipe; 212, concentrated water outlet pipe; 213, return pipe; 3, commutation mechanism; 31, first flow splitting and selecting member; 32, first water supply pipe; 33, first central axis; 34, first valve plate; 35, first servo motor; 36, second flow splitting and selecting member; 37, second water supply pipe; 38, second central axis; 39, second valve plate; 310, second servo motor; 311, detecting member; 312, impeller; 313, wheel speed detector. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes a reverse osmosis membrane cleaning device that can be switched on and conducted in opposite directions.

[0023] Embodiment 1. In a typical implementation manner of the present application, as Figure 1As shown in the figure, a reverse osmosis membrane cleaning device capable of switching conduction in opposite directions includes a frame 1, a cleaning mechanism 2 provided on the frame 1, and a commutation mechanism 3 provided on the cleaning mechanism 2. The cleaning mechanism 2 includes reverse osmosis membrane elements 210. A plurality of reverse osmosis membrane elements 210 are provided on the frame 1, and both ends of the reverse osmosis membrane elements 210 are connected to the inlet and outlet of concentrated water. The commutation mechanism 3 includes a first flow splitting and selecting member 31, a second flow splitting and selecting member 36, and a detection member 311. A first flow splitting and selecting member 31 is provided beside one end of the reverse osmosis membrane element 210, a second flow splitting and selecting member 36 is provided beside the other end of the reverse osmosis membrane element 210, and a detection member 311 is provided on the discharge route of the concentrated water. The detection member 311 detects the flow rate of the concentrated water, so that when a certain amount of concentrated water is discharged, the flow route of the concentrated water is switched between the first flow splitting and selecting member 31, one end of the reverse osmosis membrane element 210, the other end of the reverse osmosis membrane element 210, the second flow splitting and selecting member 36 and the first flow splitting and selecting member 31, the other end of the reverse osmosis membrane element 210, one end of the reverse osmosis membrane element 210, the second flow splitting and selecting member 36.

[0024] When using the present invention: Install the reverse osmosis membrane element 210 to be cleaned on the frame 1, start the cleaning equipment. The concentrated water first enters the first flow splitting and selecting member 31, then flows from the first flow splitting and selecting member 31 to one end of the reverse osmosis membrane element 210, and then flows from one end of the reverse osmosis membrane element 210 to the other end of the reverse osmosis membrane element 210, so as to clean the reverse osmosis membrane element 210 in this direction. Then the concentrated water flows from the other end of the reverse osmosis membrane element 210 into the second flow splitting and selecting member 36, and then is discharged from the second flow splitting and selecting member 36. The discharged concentrated water passes through the detection member 311, and the detection member 311 detects the flow rate of the concentrated water. When the flow rate of the concentrated water reaches a certain amount, the first flow splitting and selecting member 31 and the second flow splitting and selecting member 36 change the flow route of the concentrated water therein, so that at this time the concentrated water will flow from the first flow splitting and selecting member 31 to the other end of the reverse osmosis membrane element 210, and then flow from the other end of the reverse osmosis membrane element 210 to one end of the reverse osmosis membrane element 210, so as to clean the reverse osmosis membrane element 210 in the reverse direction. Then the concentrated water flows from one end of the reverse osmosis membrane element 210 into the second flow splitting and selecting member 36, and then is discharged from the second flow splitting and selecting member 36. Thus, the entry direction of the concentrated water at both ends of the reverse osmosis membrane element 210 is controlled in real time by the flow rate of the water, so that the concentrated water performs reciprocating pressure cleaning on the reverse osmosis membrane element 210 in the opposite direction, improving the cleaning quality of the cleaning device, improving the cleaning degree of the pollutants retained in the reverse osmosis pores, and using the flow rate of the water to control the cleaning time of the concentrated water on the reverse osmosis membrane element 210 in one direction, avoiding waste of cleaning time while ensuring the cleaning effect, and improving the cleaning efficiency of the cleaning device for the reverse osmosis membrane element 210.

[0025] Example 2, asFigures 2 - 5 As shown, the difference from the above embodiment is that the cleaning mechanism 2 further includes a concentrated water tank 21. The concentrated water tank 21 is fixedly arranged beside the frame body 1 and is used for storing concentrated water. A cleaning pump 22 is fixedly installed on one side of the frame body 1. A pump inlet pipe 23 is arranged between the cleaning pump 22 and the concentrated water tank 21. One end of the pump inlet pipe 23 is communicated with the bottom end of the concentrated water tank 21, and the other end of the pump inlet pipe 23 is communicated with the water inlet end of the cleaning pump 22.

[0026] Furthermore, a manual control valve is arranged on the pump inlet pipe 23. The manual control valve on the pump inlet pipe 23 is communicated with the middle part of the pump inlet pipe 23, so that the pump inlet pipe 23 is convenient for disassembly and maintenance.

[0027] Furthermore, a filter 24 is fixedly installed on the other side of the frame body 1. A pump outlet pipe 25 is arranged between the filter 24 and the cleaning pump 22. One end of the pump outlet pipe 25 is communicated with the water outlet end of the cleaning pump 22, and the other end of the pump outlet pipe 25 is communicated with the top end of the filter 24. The pump outlet pipe 25 is located below the reverse osmosis membrane element 210 and on one side of the frame body 1. A concentrated water inlet pipe 26 is fixedly installed at the bottom end of the filter 24. One end of the concentrated water inlet pipe 26 is communicated with the bottom end of the filter 24, and the other end of the concentrated water inlet pipe 26 extends to one side of the frame body 1. The concentrated water inlet pipe 26 is located on the other side of the frame body 1 and below the reverse osmosis membrane element 210.

[0028] Specifically, the filter 24 is a multi-layer filtering structure, and the filter 24 contains filtering components such as a sundry filtering layer, a particle adsorption layer, and a sponge filtering layer to improve the filtering effect of the filter 24 on the pollutants contained in the water after the concentrated water is cleaned.

[0029] Furthermore, a booster pump 27 is fixedly installed on one side of the frame body 1. The booster pump 27 is adjacent to the cleaning pump 22. The water inlet end of the booster pump 27 is communicated with the other end of the concentrated water inlet pipe 26. The water outlet end of the booster pump 27 is communicated with the first flow splitting and selecting member 31. A side pipe 28 is fixedly arranged beside the booster pump 27. One end of the side pipe 28 is communicated with the other end of the concentrated water inlet pipe 26, and the other end of the side pipe 28 is communicated with the first flow splitting and selecting member 31. A first connecting pipe 29 is fixedly arranged on one side of the frame body 1. One end of the first connecting pipe 29 is communicated with the first flow splitting and selecting member 31, and the other end of the first connecting pipe 29 is provided with a plurality of pipe orifices. Each pipe orifice of the first connecting pipe 29 is fixedly connected to one end of each reverse osmosis membrane element 210, and the pipe orifices of the first connecting pipe 29 are all communicated with the reverse osmosis membrane element 210.

[0030] Furthermore, manual valves are provided on both the water inlet end and the water outlet end of the booster pump 27. The manual valve at the water inlet end of the booster pump 27 is connected to the concentrated water inlet pipe 26, and the manual valve at the water outlet end of the booster pump 27 is connected to the first connecting pipe 29. A manual valve is provided on the side pipe 28, and the manual valve on the side pipe 28 is connected to the middle part of the side pipe 28. This also makes the pipelines beside each manual valve more convenient to disassemble, facilitating the maintenance of the cleaning device.

[0031] Furthermore, a second connecting pipe 211 is fixedly installed on the other side of the frame 1. One end of the second connecting pipe 211 is provided with multiple pipe orifices, and each pipe orifice of the second connecting pipe 211 is fixedly connected to the other end of each reverse osmosis membrane element 210. The pipe orifices of the second connecting pipe 211 are all connected to the reverse osmosis membrane element 210. A concentrated water outlet pipe 212 is fixedly installed at the other end of the second connecting pipe 211. One end of the concentrated water outlet pipe 212 is connected to the other end of the second connecting pipe 211, and the concentrated water outlet pipe 212 is located above the frame 1.

[0032] Furthermore, the other end of the concentrated water outlet pipe 212 is connected to the second flow splitting and selecting member 36. The second flow splitting and selecting member 36 is adjacent to the detecting member 311 and is connected to the detecting member 311. A return pipe 213 is provided between the detecting member 311 and the concentrated water tank 21. One end of the return pipe 213 is connected to the detecting member 311, and the other end of the return pipe 213 is connected to the top end of the concentrated water tank 21.

[0033] When performing a forward cleaning on the reverse osmosis membrane element 210, the cleaning pump 22 is started and the booster pump 27 is started. The cleaning pump 22 extracts concentrated water from the concentrated water tank 21. The concentrated water flows from the concentrated water tank 21 into the pump inlet pipe 23, then from the pump inlet pipe 23 into the cleaning pump 22, then from the cleaning pump 22 into the pump outlet pipe 25, then from the pump outlet pipe 25 into the filter 24. The filter 24 filters the concentrated water. Then the concentrated water flows from the filter 24 into the concentrated water inlet pipe 26, then from the concentrated water inlet pipe 26 into the booster pump 27. At the same time, the concentrated water in the concentrated water inlet pipe 26 also flows into the side pipe 28. The booster pump 27 boosts the flow of the concentrated water, and the side pipe 28 assists in changing the flow rate when boosting the concentrated water, so that the surplus water flow rate in the concentrated water inlet pipe 26 passes through the side pipe 28, thereby eliminating the reduction in the water flow rate during the treatment of the concentrated water by the booster pump 27 from the side. Then the concentrated water in the booster pump 27 and the side pipe 28 flows into the first flow diversion selector 31, and then from the first flow diversion selector 31 into the first connecting pipe 29, so that the concentrated water flows into one end of the reverse osmosis membrane element 210 from the first connecting pipe 29, and the concentrated water performs a forward cleaning on the reverse osmosis membrane element 210. Then the concentrated water flows into the second connecting pipe 211 from the other end of the reverse osmosis membrane element 210, then from the second connecting pipe 211 into the concentrated water outlet pipe 212, then from the concentrated water outlet pipe 212 into the second flow diversion selector 36, then from the second flow diversion selector 36 into the detector 311, then from the detector 311 into the return pipe 213, and then returns into the concentrated water tank 21 from the return pipe 213.

[0034] Example 3, as Figures 6 - 9 shown, the difference from the above example is that the commutation mechanism 3 further includes a first water delivery pipe 32. A first water delivery pipe 32 is provided between the first flow diversion selector 31 and the second connecting pipe 211. One end of the first water delivery pipe 32 is communicated with the first flow diversion selector 31, and the other end of the first water delivery pipe 32 is communicated with the second connecting pipe 211. The first water delivery pipe 32 is located above the frame body 1. A first central shaft 33 is rotatably fitted in the first flow diversion selector 31. The first central shaft 33 is adjacent to the communication part of the first flow diversion selector 31 and the first water delivery pipe 32, and the first central shaft 33 is adjacent to the communication part of the first flow diversion selector 31 and the first connecting pipe 29. A first valve plate 34 is fixedly installed on the first central shaft 33. The size of the first valve plate 34 is adapted to the cross-sectional area size inside the first flow diversion selector 31. A first servo motor 35 is fixedly installed on the first flow diversion selector 31. The first servo motor 35 is power-connected to the first central shaft 33.

[0035] Further, sealing rings are provided on both surfaces of the first valve plate 34, so that when the first valve plate 34 abuts against the connection between the first flow dividing selector 31 and the first water supply pipe 32 or against the connection between the first flow dividing selector 31 and the first connecting pipe 29, it can be sealed with the inner wall surface of the first flow dividing selector 31, thereby ensuring the correct flow direction of the concentrated water in the first flow dividing selector 31 and ensuring the stability of the operation of the cleaning device.

[0036] Further, a second water supply pipe 37 is provided between the second flow dividing selector 36 and the first connecting pipe 29. One end of the second water supply pipe 37 is communicated with the second flow dividing selector 36, and the other end of the second water supply pipe 37 is communicated with the first connecting pipe 29. A second central shaft 38 is rotatably fitted in the second flow dividing selector 36. The second central shaft 38 is adjacent to the connection between the second flow dividing selector 36 and the second water supply pipe 37, and the second central shaft 38 is adjacent to the connection between the second flow dividing selector 36 and the concentrated water outlet pipe 212. A second valve plate 39 is fixedly installed on the second central shaft 38. The size of the second valve plate 39 is adapted to the cross-sectional area size inside the second flow dividing selector 36. A second servo motor 310 is fixedly installed on the second flow dividing selector 36. The second servo motor 310 is power-connected to the second central shaft 38.

[0037] Further, sealing rings are provided on both surfaces of the second valve plate 39, so that when the second valve plate 39 abuts against the connection between the second flow dividing selector 36 and the second water supply pipe 37 or against the connection between the second flow dividing selector 36 and the concentrated water outlet pipe 212, it can be sealed with the inner wall surface of the second flow dividing selector 36, thereby ensuring the correct flow direction of the concentrated water in the second flow dividing selector 36 and ensuring the stability of the operation of the cleaning device.

[0038] Further, an impeller 312 is rotatably fitted in the detector 311. The size of the impeller 312 is adapted to the size inside the detector 311. A wheel speed detector 313 is fixedly installed on the detector 311. The detection end of the wheel speed detector 313 is power-connected to the impeller 312, so that the wheel speed detector 313 detects the number of rotations of the impeller 312.

[0039] Further, the wheel speed detector 313 is signal-connected to the first servo motor 35 and the wheel speed detector 313 is signal-connected to the second servo motor 310, so that the wheel speed detector 313 controls the operation of the first servo motor 35 and the second servo motor 310.

[0040] Specifically, the number of rotations of the impeller 312 detected by the wheel speed detector 313 can be set to 200 rotations. That is, after the concentrated water flow drives the impeller 312 to rotate 200 rotations, the wheel speed detector 313 emits a signal to control the first servo motor 35 and the second servo motor 310, thereby quantitatively restricting the water flow rate from the side, so that when the concentrated water is used to clean the reverse osmosis membrane element 210 in both forward and reverse directions, the usage amount of each reverse water supply is fixed, thus improving the cleaning quality of the cleaning device, enhancing the cleaning efficiency of the reverse osmosis membrane element, and avoiding waste in the device's performance.

[0041] Among them, the concentrated water flows in the detection part 311 to drive the impeller 312 to rotate. The wheel speed detector 313 detects the number of rotations of the impeller 312. When the number of rotations of the impeller 312 reaches a certain amount, the wheel speed detector 313 emits a signal to control the operation of the first servo motor 35 and the second servo motor 310. At this time, the cleaning direction of the concentrated water in the reverse osmosis membrane element 210 is changed. The first servo motor 35 drives the first central shaft 33 to deflect, and the first central shaft 33 drives the first valve plate 34 to deflect, so that the first valve plate 34 changes from abutting against the connection between the first flow dividing selector 31 and the first water supply pipe 32 to abutting against the connection between the first flow dividing selector 31 and the first connecting pipe 29. The second servo motor 310 drives the second central shaft 38 to deflect, and the second central shaft 38 drives the second valve plate 39 to deflect, so that the second valve plate 39 changes from abutting against the connection between the second flow dividing selector 36 and the second water supply pipe 37 to abutting against the connection between the second flow dividing selector 36 and the concentrated water outlet pipe 212. As a result, the concentrated water flows from the first flow dividing selector 31 into the first water supply pipe 32, from the first water supply pipe 32 into the second connecting pipe 211, from the second connecting pipe 211 into the other end of the reverse osmosis membrane element 210, and then from the other end of the reverse osmosis membrane element 210 to one end of the reverse osmosis membrane element 210, so that the reverse osmosis membrane element 210 is subjected to reverse cleaning treatment. Then the concentrated water flows from one end of the reverse osmosis membrane element 210 into the first connecting pipe 29, then from the first connecting pipe 29 into the second water supply pipe 37, then from the second water supply pipe 37 into the second flow dividing selector 36, and finally the concentrated water flows out of the second flow dividing selector 36 and returns to the concentrated water tank 21 through the detection part 311 and the return pipe 213.

[0042] The overall working principle of the cleaning device: Install the reverse osmosis membrane element 210 to be cleaned onto the rack 1, start the cleaning equipment. The concentrated water first enters the first flow diversion selector 31, then flows from the first flow diversion selector 31 to one end of the reverse osmosis membrane element 210, and then flows from one end of the reverse osmosis membrane element 210 to the other end of the reverse osmosis membrane element 210, so that the concentrated water cleans the reverse osmosis membrane element 210 in this direction. Then, the concentrated water flows from the other end of the reverse osmosis membrane element 210 into the second flow diversion selector 36 and is discharged from the second flow diversion selector 36. The discharged concentrated water passes through the detector 311, and the detector 311 detects the flow rate of the concentrated water. When the flow rate of the concentrated water reaches a certain amount, the first flow diversion selector 31 and the second flow diversion selector 36 change the flow route of the concentrated water therein, so that at this time the concentrated water will flow from the first flow diversion selector 31 to the other end of the reverse osmosis membrane element 210, and then flow from the other end of the reverse osmosis membrane element 210 to one end of the reverse osmosis membrane element 210, so that the concentrated water cleans the reverse osmosis membrane element 210 in the opposite direction. Then, the concentrated water flows from one end of the reverse osmosis membrane element 210 into the second flow diversion selector 36 and is discharged from the second flow diversion selector 36. Thus, the entry direction of the concentrated water at both ends of the reverse osmosis membrane element 210 is controlled in real time by the flow rate of water, so that the concentrated water performs reciprocating pressure cleaning on the reverse osmosis membrane element 210 in the opposite direction, improving the cleaning quality of the cleaning device, improving the cleaning degree of the pollutants retained in the reverse osmosis pores, and using the flow rate of water to control the cleaning time of the concentrated water on the reverse osmosis membrane element 210 in one direction, avoiding waste of cleaning time while ensuring the cleaning effect, and improving the cleaning efficiency of the cleaning device for the reverse osmosis membrane element 210; Among them, when performing a forward cleaning on the reverse osmosis membrane element 210, start the cleaning pump 22 and the booster pump 27. The cleaning pump 22 pumps concentrated water from the concentrated water tank 21. The concentrated water flows from the concentrated water tank 21 into the pump inlet pipe 23, then from the pump inlet pipe 23 into the cleaning pump 22, then from the cleaning pump 22 into the pump outlet pipe 25, then from the pump outlet pipe 25 into the filter 24. The filter 24 filters the concentrated water. Then the concentrated water flows from the filter 24 into the concentrated water inlet pipe 26, then from the concentrated water inlet pipe 26 into the booster pump 27. At the same time, the concentrated water in the concentrated water inlet pipe 26 also flows into the side pipe 28. The booster pump 27 boosts the flow of the concentrated water, and the side pipe 28 assists in changing the flow rate when boosting the concentrated water, enabling the surplus water flow rate in the concentrated water inlet pipe 26 to pass through the side pipe 28, thereby eliminating the reduction in water flow rate during the treatment of the concentrated water by the booster pump 27 from the side. Then the concentrated water in the booster pump 27 and the side pipe 28 flows into the first flow splitting selector 31, and then from the first flow splitting selector 31 into the first connecting pipe 29, so that the concentrated water flows from the first connecting pipe 29 into one end of the reverse osmosis membrane element 210, enabling the concentrated water to perform a forward cleaning on the reverse osmosis membrane element 210. Then the concentrated water flows from the other end of the reverse osmosis membrane element 210 into the second connecting pipe 211, then from the second connecting pipe 211 into the concentrated water outlet pipe 212, then from the concentrated water outlet pipe 212 into the second flow splitting selector 36, then from the second flow splitting selector 36 into the detector 311, then from the detector 311 into the return pipe 213, and then returns into the concentrated water tank 21 from the return pipe 213; The concentrated water flows through the detection member 311 to drive the impeller 312 to rotate. The rotation speed detector 313 detects the number of rotations of the impeller 312. When the number of rotations of the impeller 312 reaches a certain amount, the rotation speed detector 313 sends a signal to control the operation of the first servo motor 35 and the second servo motor 310. At this time, the cleaning direction of the concentrated water in the reverse osmosis membrane element 210 is changed. The first servo motor 35 drives the first central shaft 33 to deflect, and the first central shaft 33 drives the first valve plate 34 to deflect, so that the first valve plate 34 changes from abutting against the connection between the first flow dividing selector 31 and the first water supply pipe 32 to abutting against the connection between the first flow dividing selector 31 and the first connecting pipe 29. The second servo motor 310 drives the second central shaft 38 to deflect, and the second central shaft 38 drives the second valve plate 39 to deflect, so that the second valve plate 39 changes from abutting against the connection between the second flow dividing selector 36 and the second water supply pipe 37 to abutting against the connection between the second flow dividing selector 36 and the concentrated water outlet pipe 212. As a result, the concentrated water flows from the first flow dividing selector 31 into the first water supply pipe 32, from the first water supply pipe 32 into the second connecting pipe 211, from the second connecting pipe 211 into the other end of the reverse osmosis membrane element 210, and then from the other end of the reverse osmosis membrane element 210 to one end of the reverse osmosis membrane element 210, so that the reverse osmosis membrane element 210 is subjected to a reverse cleaning process. The concentrated water then flows from one end of the reverse osmosis membrane element 210 into the first connecting pipe 29, then from the first connecting pipe 29 into the second water supply pipe 37, then from the second water supply pipe 37 into the second flow dividing selector 36, and finally the concentrated water flows out of the second flow dividing selector 36 and returns to the concentrated water tank 21 through the detection member 311 and the return pipe 213.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions, comprising a frame, a cleaning mechanism disposed on the frame, and a reversing mechanism disposed on the cleaning mechanism, characterized in that: The cleaning mechanism comprises a reverse osmosis membrane element, a plurality of the reverse osmosis membrane elements are arranged on the frame, and both ends of the reverse osmosis membrane element are connected to the inlet and outlet of concentrated water; The reversing mechanism includes a first shunt selector, a second shunt selector, and a detection member. The first shunt selector is arranged next to one end of the reverse osmosis membrane element, the second shunt selector is arranged next to the other end of the reverse osmosis membrane element, and the detection member is arranged on the discharge route of the concentrated water. The detection member detects the flow rate of the concentrated water, so that when a certain amount of concentrated water is discharged, the flow route of the concentrated water is switched between the first shunt selector, one end of the reverse osmosis membrane element, the other end of the reverse osmosis membrane element, the second shunt selector and the first shunt selector, the other end of the reverse osmosis membrane element, one end of the reverse osmosis membrane element, and the second shunt selector.

2. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 1, characterized in that: The cleaning mechanism also includes a concentrated water tank, which is fixedly arranged next to the frame and is used to store concentrated water. A cleaning pump is fixedly installed on one side of the frame. A pump water inlet pipe is arranged between the cleaning pump and the concentrated water tank. One end of the pump water inlet pipe is connected to the bottom end of the concentrated water tank, and the other end of the pump water inlet pipe is connected to the water inlet end of the cleaning pump.

3. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 2, characterized in that: A filter is fixedly installed on the other side of the frame, a pump outlet pipe is arranged between the filter and the cleaning pump, one end of the pump outlet pipe is connected with the water outlet end of the cleaning pump, the other end of the pump outlet pipe is connected with the top of the filter, the pump outlet pipe is located below the reverse osmosis membrane element, the pump outlet pipe is located on one side of the frame, a concentrated water inlet pipe is fixedly installed on the bottom end of the filter, one end of the concentrated water inlet pipe is connected with the bottom end of the filter, the other end of the concentrated water inlet pipe extends to one side of the frame, the concentrated water inlet pipe is located on the other side of the frame, and the concentrated water inlet pipe is located below the reverse osmosis membrane element.

4. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 3, characterized in that: A booster pump is fixedly installed on one side of the frame, the booster pump is adjacent to the cleaning pump, the water inlet end of the booster pump is connected to the other end of the concentrated water inlet pipe, the water outlet end of the booster pump is connected to the first flow diversion selection component, a side pipe is fixedly arranged next to the booster pump, one end of the side pipe is connected to the other end of the concentrated water inlet pipe, and the other end of the side pipe is connected to the first flow diversion selection component, a first connecting pipe is fixedly arranged on one side of the frame, one end of the first connecting pipe is connected to the first flow diversion selection component, and the other end of the first connecting pipe is provided with a plurality of pipe openings, each pipe opening of the first connecting pipe is fixedly connected to one end of each of the reverse osmosis membrane elements, and the pipe openings of the first connecting pipe are all connected to the reverse osmosis membrane elements.

5. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 4, characterized in that: A second connecting pipe is fixedly installed on the other side of the frame, and one end of the second connecting pipe is provided with multiple pipe openings, each pipe opening of the second connecting pipe is fixedly connected to the other end of each reverse osmosis membrane element, and the pipe openings of the second connecting pipe are all connected to the reverse osmosis membrane elements. A concentrated water outlet pipe is fixedly installed on the other end of the second connecting pipe, and one end of the concentrated water outlet pipe is connected to the other end of the second connecting pipe. The concentrated water outlet pipe is located above the frame.

6. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 5, characterized in that: The other end of the concentrated water outlet pipe is connected to the second diversion selection component, the second diversion selection component is adjacent to the detection component, the second diversion selection component is connected to the detection component, a return pipe is arranged between the detection component and the concentrated water tank, one end of the return pipe is connected to the detection component, and the other end of the return pipe is connected to the top of the concentrated water tank.

7. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 6, characterized in that: The reversing mechanism also includes a first water supply pipe, which is arranged between the first flow diversion selection member and the second connecting pipe, one end of the first water supply pipe is connected to the first flow diversion selection member, and the other end of the first water supply pipe is connected to the second connecting pipe, the first water supply pipe is located above the frame, a first center axis is rotatably matched in the first flow diversion selection member, the first center axis is adjacent to the connection point between the first flow diversion selection member and the first water supply pipe, the first center axis is adjacent to the connection point between the first flow diversion selection member and the first connecting pipe, a first valve plate is fixedly mounted on the first center axis, the size of the first valve plate is adapted to the size of the cross-sectional area in the first flow diversion selection member, a first servo motor is fixedly mounted on the first flow diversion selection member, and the first servo motor is dynamically connected to the first center axis.

8. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 7, characterized in that: A second water supply pipe is arranged between the second flow diversion selector and the first connecting pipe, one end of the second water supply pipe is connected with the second flow diversion selector, and the other end of the second water supply pipe is connected with the first connecting pipe, a second center shaft is rotatably fitted in the second flow diversion selector, the second center shaft is adjacent to the connection point between the second flow diversion selector and the second water supply pipe, the second center shaft is adjacent to the connection point between the second flow diversion selector and the concentrated water outlet pipe, a second valve plate is fixedly mounted on the second center shaft, the size of the second valve plate is matched with the cross-sectional area size in the second flow diversion selector, a second servo motor is fixedly mounted on the second flow diversion selector, and the second servo motor is dynamically connected to the second center shaft.

9. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 8, characterized in that: An impeller is rotatably mounted inside the detection member, and the size of the impeller matches the size inside the detection member. A wheel speed detector is fixedly mounted on the detection member, and the detection end of the wheel speed detector is dynamically connected to the impeller, so that the wheel speed detector detects the number of rotations of the impeller.

10. A reverse osmosis membrane cleaning device capable of switching conduction in opposite directions according to claim 9, characterized in that: The wheel speed detector is connected to the first servo motor signal, and the wheel speed detector is connected to the second servo motor signal, so that the wheel speed detector controls the operation of the first servo motor and the second servo motor.

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