Online cleaning device for RO (Reverse Osmosis) membrane of purified water system

Abstract

The utility model discloses an on-line cleaning device for an RO membrane of a purified water system. The on-line cleaning device comprises a plunger barrel, an interception barrel, a driving assembly and a plunger assembly installed on the inner side of the plunger barrel in a sliding mode. The driving assembly is used for driving the plunger assembly to reciprocate in the plunger barrel, pressurization and suction of the cleaning liquid are achieved, the cleaning liquid enters the RO membrane through the one-way liquid outlet pipe in a pressurized mode, and efficient cleaning is completed. The plunger assembly comprises a dirt storage tank, an annular cover and a filter screen guide hopper fixed to the inner side of the annular cover, a plurality of evenly-distributed bulkheads are arranged on the periphery of the filter screen guide hopper, and splayed interception petals are arranged between the bulkheads and used for guiding in and intercepting impurities in a one-way mode and preventing the impurities from flowing back to pollute cleaning fluid. The device is compact in structure and easy and convenient to operate, has the advantages of being high in cleaning efficiency, good in filtering effect and high in automation degree, and can effectively solve the problems of low cleaning efficiency, complex operation and secondary pollution in the prior art. The device is suitable for cleaning and maintaining RO membranes of various purified water systems.

Description

Technical Field

[0001] The utility model relates to the technical field of RO membrane cleaning, in particular to an on-line cleaning device for RO membranes in a purified water system. Background Technique

[0002] In the existing reverse osmosis pure water system, the reverse osmosis membrane is usually cleaned by setting a cleaning solution in a cleaning tank. As the core equipment for the key production process of preparing contact lens care solution, ensuring the high purity of water quality is crucial for product quality. The design of this system includes a second cleaning valve, a first cleaning valve, a second cleaning ball valve, and a first cleaning ball valve installed in sequence above one side of the cleaning tank, and a first outlet valve of the cleaning tank, a second outlet valve of the cleaning tank, a cleaning pump, a cleaning pump outlet valve, and a third cleaning ball valve connected in sequence below the cleaning tank. The cleaning solution enters from the inlet of the security filter, flows through the reverse osmosis system, and finally returns to the cleaning solution tank through the cleaning solution outlet after adjusting the pressure of the filter membrane.

[0003] However, this cleaning method has many defects, especially prominent in the case of extremely high requirements for water quality in the production of contact lens care solution. First of all, the cleaning efficiency is low. The traditional cleaning system mainly relies on the cleaning pump for circulating cleaning, which is difficult to completely remove the stains and impurities on the membrane surface, resulting in unsatisfactory cleaning effect and long time consumption, directly affecting the quality of pure water, and thus may affect the safety and quality of contact lens care solution. Secondly, the operation process is complex. Since the system contains multiple valves and cleaning pipelines, the operation steps are cumbersome, and misoperations are prone to occur, increasing the complexity of system operation and the difficulty of maintenance. In addition, impurities are likely to flow back in the cleaning solution during the cleaning process, resulting in secondary pollution, further affecting the cleaning degree of the reverse osmosis membrane and reducing the purity of pure water. This poses a potential risk for the production of contact lens care solution that highly depends on the quality of pure water. Finally, the automation degree of the existing system is low. Most of the cleaning process requires manual adjustment of valves and cleaning parameters, which is difficult to meet the cleaning requirements under different working conditions, and the cleaning effect is not stable enough, thus affecting the water quality control of the entire production process and the consistency of product quality. Content of the Utility Model

[0004] The utility model aims to solve the technical problems existing in the prior art or related technologies, such as low cleaning efficiency, complex operation, poor filtering effect, and low automation degree.

[0005] To this end, the technical solution adopted by the utility model is: an online cleaning device for RO membrane of purified water system, comprising a plunger barrel, a retention barrel, a driving assembly and a plunger assembly slidably mounted on the inner side of the plunger barrel. The driving assembly is used to drive the plunger assembly to slide back and forth inside the plunger barrel, the retention barrel is fixedly mounted on the top of the plunger barrel, a one-way liquid inlet pipe is provided on one side of the plunger barrel, a one-way liquid outlet pipe is fixedly connected to the top of the retention barrel, a filter disc is provided on the inner side of the retention barrel and a liquid storage cavity is formed between the filter disc and the plunger assembly, the plunger assembly comprises a sewage storage tank, a ring cover and a filter guide bucket fixed on the inner side of the ring cover, a plurality of evenly distributed bulkhead plates are provided on the outer periphery of the filter guide bucket, a retention flap is provided between adjacent bulkhead plates, and the retention flap is in an eight-shaped shape for one-way introduction of impurities, a liquid inlet hole is provided on the surface of the sewage storage tank and the liquid inlet hole is arranged opposite to the one-way liquid inlet pipe.

[0006] In a preferred example, the utility model can be further configured as follows: the filter screen guide is a conical funnel-shaped structure, and the ring cover is a metal filter screen structure, and the filter hole diameter of the ring cover is larger than the filter hole diameter of the filter disc. By adopting the above technical solution, the impurity interception effect during the cleaning process can be further improved, the quality of the cleaning liquid can be ensured, and secondary pollution can be prevented.

[0007] In a preferred example, the utility model can be further configured as follows: when the plunger assembly moves to the lowest end, the liquid inlet hole is connected to the one-way liquid inlet pipe, and one-way valves are provided inside the one-way liquid inlet pipe and the one-way liquid outlet pipe for one-way flow guidance of the cleaning liquid. By adopting the above technical solution, the one-way flow of the cleaning liquid is guaranteed, the cleaning efficiency is improved, and the pollution problem caused by liquid reflux is avoided.

[0008] In a preferred example, the utility model can be further configured as follows: the driving assembly includes a driving chassis, a motor, and a crankshaft rotatably mounted inside the driving chassis, the output end of the motor is drivingly connected to the surface of the crankshaft for driving the crankshaft to rotate, the surface of the crankshaft is movably connected to a crank connecting rod, the connection point between the crankshaft and the crank connecting rod deviates from the axis of the crankshaft, and the other end of the crank connecting rod is movably connected to the bottom end of the plunger assembly. By adopting the above technical solution, the driving assembly can effectively drive the stable reciprocating motion of the plunger assembly to ensure the continuity and stability of the cleaning process.

[0009] In a preferred example, the utility model can be further configured as follows: the interception flap is a silicone material component, and the interception flaps between adjacent compartment plates are relatively abutted. By adopting the above technical solution, the impurity interception effect is further improved, ensuring that impurities will not flow back during the cleaning process, and improving the purity of the cleaning liquid.

[0010] The beneficial effects achieved by the utility model are:

[0011] 1. In the present utility model, the reciprocating motion of the plunger assembly is used to achieve multiple pressurized flushes of the RO membrane, significantly improving the cleaning efficiency. At the same time, the device has a compact structure, occupies a small space, is convenient for installation and maintenance, and the detachable design of each component simplifies the operation process and facilitates cleaning and maintenance.

[0012] 2. In the present utility model, a multi-stage filtration design using a filter screen guide hopper and a partition plate is adopted to effectively intercept impurities, prevent secondary pollution, and improve the water purification effect. In addition, through the control circuit in the drive assembly, the cleaning parameters can be automatically adjusted according to actual needs, improving the degree of automation of cleaning and reducing human intervention. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0014] Figure 2 is a schematic diagram of the overall cross-sectional structure of an embodiment of the present utility model;

[0015] Figure 3 is a schematic diagram of the drive assembly structure of an embodiment of the present utility model;

[0016] Figure 4 is a schematic diagram of the exploded structure of the plunger assembly of an embodiment of the present utility model;

[0017] Figure 5 is a schematic diagram of the ring cover and the filter screen guide hopper of an embodiment of the present utility model.

[0018] Reference Signs:

[0019] 100, plunger cylinder; 110, one-way liquid inlet pipe;

[0020] 200, intercepting cylinder; 210, one-way liquid outlet pipe; 220, filter disc; 201, liquid storage cavity;

[0021] 300, drive assembly; 310, drive machine case; 320, motor; 330, crankshaft; 331, crank connecting rod;

[0022] 400, plunger assembly; 410, sewage storage tank; 420, ring cover; 430, filter screen guide hopper; 411, liquid inlet hole; 431, partition plate; 431, intercepting flap. Detailed Embodiments

[0023] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model.

[0025] As Figures 1 to 5 shown, the on-line cleaning device for the RO membrane of the purified water system of the present utility model mainly includes a plunger cylinder 100, a retention cylinder 200, a driving assembly 300, and a plunger assembly 400 slidably installed inside the plunger cylinder 100.

[0026] The plunger cylinder 100 is the main cleaning liquid container, and the plunger assembly 400 slides inside it to achieve the pressurization and reflux of the cleaning liquid. A one-way liquid inlet pipe 110 is provided on one side of the plunger cylinder 100 for introducing the cleaning liquid into the plunger cylinder. The retention cylinder 200 is fixedly installed at the top of the plunger cylinder 100, and the plunger cylinder 100 and the retention cylinder 200 are firmly connected by bolts or other fasteners. A one-way liquid outlet pipe 210 is fixedly connected to the top of the retention cylinder 200 for outputting the pressurized cleaning liquid to the RO membrane to be cleaned. A filter disc 220 is provided inside the retention cylinder 200, and a liquid storage cavity 201 is formed between the filter disc 220 and the plunger assembly 400 for storing the liquid refluxed during the cleaning process.

[0027] The design of the plunger assembly 400 ensures that the cleaning liquid is not affected by impurities during pressurization and improves the cleaning effect through multi-stage filtration. The plunger assembly 400 includes a dirt storage tank 410, a ring cover 420, and a filter screen guide hopper 430 fixed to the inner side of the ring cover 420. The filter screen guide hopper 430 is designed as a conical funnel-shaped structure to ensure smooth flow of the cleaning liquid and increase the filtration efficiency.

[0028] A plurality of partition plates 431 are evenly distributed on the outer periphery of the filter screen guide hopper 430, and a retention flap 432 is provided between adjacent partition plates 431. The retention flap 432 is in an inverted V shape for unidirectionally introducing and retaining the impurities generated during the cleaning process to prevent these impurities from flowing back and contaminating the RO membrane. The ring cover 420 adopts a metal filter screen structure, and the diameter of its filter holes is designed to be larger than the diameter of the filter holes of the filter disc 220 to further enhance the impurity retention effect.

[0029] The driving assembly 300 includes a driving machine box 310, a motor 320, a crankshaft 330, and a crank connecting rod 331. The output end of the motor 320 drives the crankshaft 330 to rotate through transmission connection. The surface of the crankshaft 330 is eccentrically connected to the crank connecting rod 331, and the other end of the crank connecting rod 331 is movably connected to the bottom end of the plunger assembly 400. When the motor 320 works, the crankshaft 330 drives the crank connecting rod 331, so that the plunger assembly 400 reciprocates up and down inside the plunger cylinder 100.

[0030] During the cleaning process, the motor 320 drives the crankshaft 330 to rotate. The crankshaft 330 drives the plunger assembly 400 to move upward through the crank connecting rod 331. As a result, the cleaning liquid in the plunger cylinder 100 is pressurized and enters the RO membrane through the one-way liquid outlet pipe 210 for cleaning. When the plunger assembly 400 moves downward during the return stroke, the pressure in the plunger cylinder 100 and the retention cylinder 200 decreases. At this time, the cleaned sewage and impurities are sucked into the sewage storage tank 410 through the one-way liquid inlet pipe 110.

[0031] The cleaned sewage enters the sewage storage tank 410 and is preliminarily filtered under the action of the filter screen guide hopper 430. The impurities are retained between the partition plates 431 to prevent them from mixing into the cleaning liquid again. The entire cleaning cycle is continuously repeated to ensure that the RO membrane is thoroughly cleaned.

[0032] To ensure the one-way flow of the cleaning liquid, check valves are provided inside both the one-way liquid inlet pipe 110 and the one-way liquid outlet pipe 210. These valves are used to prevent the backflow of the cleaning liquid and ensure the continuity and efficiency of the cleaning process.

[0033] To automate the cleaning process, the drive assembly 300 is equipped with a control circuit. The control circuit can automatically adjust the movement frequency and amplitude of the plunger assembly 400 according to the cleaning requirements to adapt to the cleaning needs under different working conditions. In this way, the RO membrane can always be in the best cleaning state to ensure its long-term service performance.

[0034] After the cleaning work is completed, the user can easily disassemble the plunger cylinder 100 and the retention cylinder 200 to clean or replace the filter disc 220 and the filter screen guide hopper 430 inside the sewage storage tank 410. The detachable design of this device ensures the convenience of maintenance and greatly reduces the maintenance cost of the equipment.

[0035] The working principle and usage process of the present utility model:

[0036] The present utility model relates to an on-line cleaning device for the RO membrane of a purified water system. Its working principle is based on the reciprocating motion of the plunger assembly 400. The drive assembly 300 drives the plunger assembly 400 to perform reciprocating motion in the plunger cylinder 100, thereby realizing the pressurization and suction of the cleaning liquid to achieve the purpose of efficiently cleaning the RO membrane.

[0037] Specifically, when the motor 320 in the drive assembly 300 starts to operate, the motor 320 drives the crank connecting rod 331 through the crankshaft 330, driving the plunger assembly 400 to perform up and down reciprocating motion in the plunger cylinder 100. When the plunger assembly 400 moves upward, the cleaning liquid in the plunger cylinder 100 is pressurized and enters the RO membrane to be cleaned through the one-way liquid outlet pipe 210, realizing the high-pressure backwashing of the RO membrane. This process can effectively remove the stains and impurities on the surface and inside of the RO membrane.

[0038] When the plunger assembly 400 moves downward during the return stroke, the pressure inside the plunger barrel 100 and the interception barrel 200 decreases. At this time, the cleaned sewage and impurities are sucked into the sewage storage tank 410 through the one-way liquid inlet pipe 110. A filter screen guide hopper 430 is provided inside the sewage storage tank 410 to intercept impurities through preliminary filtration and prevent them from flowing back to pollute the cleaning liquid again.

[0039] The design of the filter screen guide hopper 430 ensures that impurities are effectively intercepted between the partition plates 431, and the filtered liquid continues to be used for the next cleaning cycle until the cleaning is completed. The entire cleaning process is highly automated under the control of the control circuit, and the cleaning efficiency is significantly improved.

[0040] Usage process

[0041] Preparation work: Inject the cleaning liquid from the purified water system into the plunger barrel 100 and connect it to the cleaning system through the one-way liquid inlet pipe 110. Check whether all components of the equipment are firmly connected to ensure that the drive assembly 300, the plunger barrel 100, the interception barrel 200, and the plunger assembly 400 are in normal conditions.

[0042] Start the equipment: Start the motor 320 of the drive assembly 300. The motor 320 starts to drive the plunger assembly 400 to reciprocate inside the plunger barrel 100 through the crankshaft 330 and the crank connecting rod 331. When the plunger assembly 400 moves upward, the cleaning liquid inside the plunger barrel 100 is pressurized through the one-way liquid outlet pipe 210 and enters the RO membrane for cleaning.

[0043] Cleaning process: When the plunger assembly 400 moves during the return stroke, the cleaned sewage and impurities are sucked into the sewage storage tank 410 through the one-way liquid inlet pipe 110 and are preliminarily filtered inside the filter screen guide hopper 430. The impurities are intercepted between the partition plates 431 inside the filter screen guide hopper 430, and the filtered cleaning liquid continues to be used for the next cleaning.

[0044] End the cleaning: After reaching the set cleaning time or the number of cleaning liquid circulation times, turn off the drive assembly 300 to stop the operation of the motor 320. Disassemble the plunger barrel 100 and the interception barrel 200, and clean or replace the filter disc 220 and the filter screen guide hopper 430 inside the sewage storage tank 410.

[0045] Maintenance and cleaning: Regularly check the status of each component, especially the cleanliness of the filter screen guide hopper 430 and the partition plates 431, to ensure the long-term normal operation of the equipment. When necessary, maintain or replace the plunger barrel 100, the interception barrel 200, and the drive assembly 300 to ensure the cleaning effect and the service life of the equipment.

[0046] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. Online cleaning device for RO membrane of purified water system, characterized in that include: A plunger barrel (100), a retaining barrel (200), a driving assembly (300), and a plunger assembly (400) slidably mounted inside the plunger barrel (100), wherein the driving assembly (300) is used to drive the plunger assembly (400) to slide back and forth inside the plunger barrel (100), the retaining barrel (200) is fixedly mounted on the top end of the plunger barrel (100), a one-way liquid inlet pipe (110) is provided on one side of the plunger barrel (100), a one-way liquid outlet pipe (210) is fixedly connected to the top end of the retaining barrel (200), a filter disc (220) is provided on the inside of the retaining barrel (200), and a filter disc (220) is provided between the filter disc (220) and the plunger. The plunger assembly (400) comprises a sewage storage tank (410), a filter guide bucket (430), and a filter guide bucket (430) fixed to the inner side of a ring cover (420); a plurality of evenly distributed bulkhead plates (431) are arranged on the outer periphery of the filter guide bucket (430); and interception flaps (432) are arranged between adjacent bulkhead plates (431); and the interception flaps (432) between adjacent bulkhead plates (431) are in an eight-shaped shape for unidirectionally introducing impurities; a liquid inlet hole (411) is opened on the surface of the sewage storage tank (410), and the liquid inlet hole (411) is arranged opposite to the unidirectional liquid inlet pipe (110).

2. The on-line cleaning device for RO membrane of the purified water system according to claim 1, characterized in that, The filter screen guide (430) is a conical funnel-shaped structure, and the ring cover (420) is a metal filter screen structure. The filter hole diameter of the ring cover (420) is larger than the filter hole diameter of the filter disc (220).

3. The online cleaning device for the RO membrane of the purified water system according to claim 1, wherein When the plunger assembly (400) moves to the lowest end, the liquid inlet hole (411) is connected to the one-way liquid inlet pipe (110), and one-way valves are provided inside the one-way liquid inlet pipe (110) and the one-way liquid outlet pipe (210) for one-way flow guidance of the cleaning liquid.

4. The online cleaning device for the RO membrane of the purified water system according to claim 1, wherein, The driving assembly (300) comprises a driving case (310), a motor (320), and a crankshaft (330) rotatably mounted inside the driving case (310); the output end of the motor (320) is drivingly connected to the surface of the crankshaft (330) for driving the crankshaft (330) to rotate; the surface of the crankshaft (330) is movably connected to a crank connecting rod (331), and the connection point between the crankshaft (330) and the crank connecting rod (331) is offset from the axis of the crankshaft (330); the other end of the crank connecting rod (331) is movably connected to the bottom end of the plunger assembly (400).

5. The on-line cleaning device for RO membrane of the purified water system according to claim 1, characterized in that The interception flaps (432) are made of silica gel, and the interception flaps (432) between adjacent bulkheads (431) are relatively abutted.

6. The on-line cleaning device for RO membrane of the purified water system according to claim 1, characterized in that The plunger cylinder (100), the retaining cylinder (200), the driving assembly (300) and the plunger assembly (400) can be detachably mounted to facilitate maintenance and cleaning.

7. The on-line cleaning device for RO membrane of the purified water system according to claim 1, characterized in that, The driving assembly (300) also includes a control circuit for automatically adjusting the movement frequency and amplitude of the plunger assembly (400) according to cleaning requirements.

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