Reverse osmosis membrane cleaning equipment

Abstract

The utility model discloses reverse osmosis membrane cleaning equipment, which relates to the technical field of reverse osmosis membrane cleaning and comprises a medicament container, a liquid conveying device and a pipeline component. The agent container is used for storing cleaning agents; the pipeline assembly comprises a first pipeline connected between the medicament container and the liquid inlet end of the liquid conveying device, a second pipeline connected to the liquid outlet end of the liquid conveying device and a third pipeline connected between the second pipeline and the medicament container, and the third pipeline is provided with a first valve capable of adjusting the opening degree; a reverse osmosis membrane element to be cleaned is arranged on the second pipeline, the reverse osmosis membrane element is provided with a first end for a cleaning agent to enter and a second end for liquid in the reverse osmosis membrane element to be discharged, and the liquid pressure borne by the reverse osmosis membrane element is adjusted by controlling the opening degree of the first valve. The risk that the reverse osmosis membrane element is damaged due to overlarge pressure is reduced, and the cleaning effect and the cleaning efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the cleaning of a reverse osmosis membrane, in particular to a reverse osmosis membrane cleaning device. Background Art

[0002] Reverse osmosis membranes are widely used in sewage treatment systems. The separation characteristics of reverse osmosis can effectively remove impurities such as dissolved salts, colloids, organic matter, bacteria, etc. in water, and separate relatively clean water from sewage.

[0003] The reverse osmosis membrane element includes a shell, a central tube arranged in the shell, and a reverse osmosis membrane located between the central tube and the shell. The reverse osmosis membrane is spirally wound around the outer periphery of the central tube. When working, after the sewage passes through the reverse osmosis membrane, the pollutants in the sewage are filtered and separated by the reverse osmosis membrane, and the clean water is discharged from the central tube.

[0004] After the reverse osmosis membrane has been working for a period of time, pollutants accumulate on the membrane surface, which will affect the working effect of the reverse osmosis membrane. Therefore, the reverse osmosis membrane needs to be cleaned to keep the reverse osmosis membrane in good working performance.

[0005] However, when the reverse osmosis membrane is severely contaminated, it is not only difficult to clean, but also easily damaged during the cleaning process.

[0006] The above contents are only used to help understand the technical solution of this application and do not constitute an admission that the above contents are prior art. Utility Model Content

[0007] The utility model aims to provide a reverse osmosis membrane cleaning device, which can reliably clean the reverse osmosis membrane and reduce the risk of reverse osmosis membrane damage during the cleaning process.

[0008] In order to achieve the above utility model purpose, the utility model proposes a reverse osmosis membrane cleaning device, comprising:

[0009] A reagent container, used for storing cleaning reagents;

[0010] a liquid delivery device; and,

[0011] A pipeline assembly, comprising a first pipeline connected between the medicine container and the liquid inlet end of the liquid delivery device, a second pipeline connected to the liquid outlet end of the liquid delivery device, and a third pipeline connected between the second pipeline and the medicine container, wherein the third pipeline is provided with a first valve with an adjustable opening size;

[0012] The reverse osmosis membrane element to be cleaned is arranged on the second pipeline. The reverse osmosis membrane element has a first end for the cleaning agent to enter and a second end for the liquid inside the reverse osmosis membrane element to be discharged. The liquid pressure on the reverse osmosis membrane element is adjusted by controlling the opening of the first valve.

[0013] Further, the initial opening of the first valve is adjusted by the mass difference before and after the reverse osmosis membrane element performs filtering work, and the initial opening is positively correlated with the magnitude of the mass difference;

[0014] Subsequently, the opening of the first valve is adjusted according to the state of the liquid discharged from the reverse osmosis membrane element during the cleaning process. The clearer the liquid becomes, the smaller the opening of the first valve is adjusted.

[0015] Furthermore, the reverse osmosis membrane cleaning device further comprises a pressure sensor for determining the liquid pressure to which the reverse osmosis membrane element is subjected, and the opening of the first valve is controlled according to the detection result of the pressure sensor, and the opening of the first valve is positively correlated with the pressure value detected by the pressure sensor;

[0016] The pressure sensor is arranged on the second pipeline.

[0017] Further, the first valve is a manual valve; or,

[0018] The first valve is an automatic valve, and the reverse osmosis membrane cleaning equipment further comprises a controller electrically connected to both the first valve and the pressure sensor, and the controller controls the first valve to adjust its opening according to a signal from the pressure sensor.

[0019] Further, the connection point between the third pipeline and the medicine container is higher than the liquid level of the cleaning agent in the medicine container in the initial state; and / or,

[0020] The third pipeline is provided with a one-way valve that only allows the liquid to flow toward the medicine container.

[0021] Furthermore, the reverse osmosis membrane cleaning device further comprises a filter, the reverse osmosis membrane element and the filter are both arranged on the second pipeline, and the cleaning agent delivered by the liquid delivery device enters the reverse osmosis membrane element after passing through the filter;

[0022] The second pipeline is connected between the liquid outlet and the medicine container, and includes a first pipeline connected between the liquid outlet and the filter, a second pipeline connected between the filter and the first end of the reverse osmosis membrane element, and a third pipeline connecting the medicine container and the second end of the reverse osmosis membrane element.

[0023] Furthermore, the third pipeline is connected between the first pipeline and the medicine container.

[0024] Further, the third conduit is configured to enable the liquid entering the medicine container to be observed from the outside;

[0025] The upper end of the medicine container is provided with an opening, and the outlet of the third pipe is arranged corresponding to the opening and is located above the liquid level of the cleaning agent in the medicine container; and / or,

[0026] The third pipeline is partially or entirely made of transparent material.

[0027] Furthermore, the second pipeline between the reverse osmosis membrane element and the filter is provided with a gas interface, and the gas interface is used to be connected to an external gas input device, and the gas input device can generate gas with adjustable pressure;

[0028] The pipeline assembly also includes a controller electrically connected to the pressure sensor and the gas input device, and the controller controls the gas input device to adjust the gas pressure according to the liquid pressure applied to the reverse osmosis membrane element. The gas pressure generated by the gas input device is negatively correlated with the liquid pressure applied to the reverse osmosis membrane element.

[0029] Further, the second pipeline includes a branch pipeline connected to the reverse osmosis membrane element;

[0030] The second pipeline includes a connecting mechanism for connecting to the reverse osmosis membrane element. The number of the connecting mechanisms is multiple to connect to multiple reverse osmosis membrane elements. The multiple reverse osmosis membrane elements are connected in parallel, and each is correspondingly provided with a branch pipeline and a third pipeline. Each branch pipeline is provided with at least one second valve with adjustable opening size.

[0031] Furthermore, the first end of the reverse osmosis membrane element is the water outlet end when the reverse osmosis membrane element performs filtering work, and the second end of the reverse osmosis membrane element is the water inlet end when the reverse osmosis membrane element performs filtering work.

[0032] Further, the reverse osmosis membrane element comprises a shell, a central tube and a reverse osmosis membrane located between the shell and the central tube;

[0033] When the reverse osmosis membrane element is cleaned, the end of the central tube of the reverse osmosis membrane element located at the first end is blocked;

[0034] The reverse osmosis membrane cleaning device includes a plug for plugging the central tube of the reverse osmosis membrane element;

[0035] The reverse osmosis membrane element is vertically arranged, and the second end is located above the first end.

[0036] Further, the second pipeline includes a connection mechanism for connecting to the reverse osmosis membrane element, the connection mechanism includes a first connection cover for detachably connecting to the first end of the reverse osmosis membrane element and a second connection cover for detachably connecting to the second end of the reverse osmosis membrane element, the first connection cover and the second connection cover each include a cavity and an outer ring portion for enclosing the outer periphery of the reverse osmosis membrane element;

[0037] The outer ring portion is sealed and connected to the outer wall of the reverse osmosis membrane element;

[0038] The cavity of the first connection cover is connected to the second pipeline, and the cavity of the second connection cover is connected to a third pipeline, and the third pipeline is used to discharge the liquid coming out of the reverse osmosis membrane element into the medicine container.

[0039] Furthermore, the first connection cover and the second connection cover each include a support plate connected to the outer ring portion, the cavity and the outer ring portion are respectively located on both sides of the support plate, and the support plate is used to abut against the end of the reverse osmosis membrane element to limit the reverse osmosis membrane element.

[0040] Furthermore, the reverse osmosis membrane cleaning device further comprises a pressing mechanism for driving the first connecting cover and the second connecting cover to press the two ends of the reverse osmosis membrane element;

[0041] The clamping mechanism comprises a fixed frame, a movable frame connected to the second connection cover, and a linear drive device connected between the fixed frame and the movable frame, the first connection cover is relatively fixed to the fixed frame, the second connection cover is slidably matched with the reverse osmosis membrane element, and the linear drive device is used to drive the movable frame to move along the axial direction of the reverse osmosis membrane element so that the second connection cover is sleeved on the reverse osmosis membrane element;

[0042] The linear drive device is electrically connected to a controller of the reverse osmosis membrane cleaning device, and the controller adjusts the driving force of the linear drive device according to a detection result of a pressure sensor used to determine the liquid pressure applied to the reverse osmosis membrane element.

[0043] Furthermore, at least two sets of connection mechanisms are provided at both ends of the medicine container in the width direction;

[0044] At least one linear drive device is provided at both ends of the medicine container in the length direction, and the movable frame is located directly above the medicine container;

[0045] The movable frame is simultaneously connected to at least two groups of second connection covers of the connection mechanisms.

[0046] Compared with the prior art, the utility model has the following beneficial effects:

[0047] The reverse osmosis membrane cleaning device of the utility model is provided with a third pipeline connected between the second pipeline and the reagent container, and the third pipeline is provided with a first valve capable of adjusting the opening size. By adjusting the opening size of the first valve, the liquid pressure exerted on 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The utility model is a schematic diagram of the hydraulic principle of a reverse osmosis membrane cleaning device in one embodiment.

[0049] Figure 2 It is a three-dimensional structural schematic diagram of a reverse osmosis membrane cleaning device in one embodiment of the utility model.

[0050] Figure 3 yes Figure 2 The front schematic diagram of the reverse osmosis membrane cleaning equipment is shown.

[0051] Figure 4 It is a three-dimensional schematic diagram of a reverse osmosis membrane element in an embodiment of the utility model.

[0052] Figure 5 yes Figure 4 A cross-sectional schematic diagram of a reverse osmosis membrane element is shown.

[0053] Figure 6 It is a module block diagram of the electrical components of the reverse osmosis membrane cleaning device in one embodiment of the utility model.

[0054] Figure 7 The utility model is a three-dimensional structural schematic diagram of a reverse osmosis membrane cleaning device in an embodiment of the utility model, and a control box is shown in the figure.

[0055] Figure 8 It is a schematic diagram of the positions of the second pipeline, the filter, the medicine container and other components in one embodiment of the utility model.

[0056] Fig. 9 It is a cross-sectional schematic diagram of a connection mechanism and a reverse osmosis membrane element in one embodiment of the utility model.

[0057] Fig.10 yes Fig. 9 Enlarged view of part I in the middle.

[0058] Fig.11 It is a three-dimensional schematic diagram of a first connecting cover in an embodiment of the utility model.

[0059] Fig.12 yes Figure 7 A top view of a reverse osmosis membrane cleaning device is shown. DETAILED DESCRIPTION

[0060] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0061] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0062] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] like Figures 1 to 3 As shown, a reverse osmosis membrane cleaning device corresponding to a preferred embodiment of the utility model includes a reagent container 1, a liquid conveying device 3 and a pipeline component 4.

[0064] The reagent container 1 is used to store the cleaning reagent, and the cleaning reagent can be pre-configured before cleaning the reverse osmosis membrane.

[0065] The liquid delivery device 3 is used to generate power to drive the liquid to move, and it can suck the liquid in the medicine container 1 into the reverse osmosis membrane element 20 for cleaning. The liquid delivery device 3 can be, for example, a water pump. The liquid delivery device 3 has a liquid inlet end 30 and a liquid outlet end 31, and the liquid is sucked from the liquid inlet end 30 and discharged from the liquid outlet end 31.

[0066] The pipeline assembly 4 includes a first pipeline 40 connected between the medicine container 1 and the liquid inlet end 30 of the liquid conveying device 3, a second pipeline 41 connected to the liquid outlet end 31 of the liquid conveying device 3, and a third pipeline 42 connected between the second pipeline 41 and the medicine container 1. The first pipeline 40, the second pipeline 41 and the third pipeline 42 each include at least one pipe for liquid circulation. The reverse osmosis membrane element 20 to be cleaned is arranged on the second pipeline 41, and the liquid in the second pipeline 41 can flow through the reverse osmosis membrane element 20. The two ends of the reverse osmosis membrane element 20 in the length direction are respectively a first end 200 and a second end 201. The first end 200 is used for the cleaning agent to enter, and the second end 201 is used for the liquid inside the reverse osmosis membrane element 20 to be discharged. Figure 4 and Figure 5 As shown, the reverse osmosis membrane element 20 includes a housing 20a, a central tube 20b disposed in the housing 20a, and a reverse osmosis membrane 20c located between the central tube 20b and the housing 20a. The cleaning agent transported by the second pipeline 41 enters from the first end 200, flows through the reverse osmosis membrane 20c for cleaning, and the cleaned liquid is discharged from the second end 201.

[0067] The third pipeline 42 is provided with a first valve 420 with an adjustable opening size, and the opening size of the first valve 420 can be adjusted according to the blockage of the reverse osmosis membrane element 20. When the reverse osmosis membrane element 20 is blocked more seriously, after the cleaning agent is passed into the reverse osmosis membrane element 20, the membrane element may burst due to excessive pressure, resulting in damage to the reverse osmosis membrane 20c. At the same time, the liquid conveying device 3 may also increase energy consumption (increase in current) due to water outlet obstruction, or even burn due to overload. By setting the first valve 420, the flow rate of the liquid refluxed to the reagent container 1 can be adjusted by adjusting the opening size of the first valve 420, thereby adjusting the liquid flow size entering the reverse osmosis membrane element 20 and the liquid pressure in the reverse osmosis membrane element 20, and ensuring the reliable operation of the liquid conveying device 3. When the reverse osmosis membrane element 20 is blocked seriously, the first valve 420 can be opened to reduce the initial liquid pressure (referring to the liquid pressure of the reverse osmosis membrane element 20 at the beginning of the cleaning work) on the reverse osmosis membrane element 20. After a period of cleaning at a small flow rate, the blockage phenomenon is alleviated. At this time, the first valve 420 can be opened to increase the flow rate and pressure for cleaning to ensure the cleaning efficiency. In other words, the opening of the first valve 420 can be adjusted according to the liquid pressure on the reverse osmosis membrane element 20, so as to reliably clean the reverse osmosis membrane element 20 and prevent damage to the reverse osmosis membrane 20c, while ensuring high cleaning efficiency and reliability of the liquid conveying device 3.

[0068] In some embodiments, the blockage condition can be judged by the weight of the reverse osmosis membrane element 20. By weighing the mass of the reverse osmosis membrane element 20 to be cleaned (water can be filtered out in advance to improve the accuracy of the measurement), the mass is subtracted from the mass of the reverse osmosis membrane element 20 before the filtering work, and the mass difference before and after the reverse osmosis membrane element 20 performs the filtering work is obtained. The mass difference is the mass of the pollutants accumulated in the reverse osmosis membrane element 20. The larger the mass difference, the more serious the blockage. Then, the initial opening of the first valve 420 (referring to the opening size of the first valve 420 at the beginning of the cleaning work) can be determined according to the mass difference, so that the initial liquid pressure on the reverse osmosis membrane element 20 is not too large. The initial opening is positively correlated with the size of the mass difference. The larger the mass difference, the larger the opening of the first valve 420, so as to increase the reflux flow and reduce the pressure on the reverse osmosis membrane. When the first valve 420 works at the initial opening, the cleaning work can be carried out safely. In actual application, a corresponding relationship between the opening of the first valve 420 and the mass difference can be established. For example, a corresponding mapping relationship between the specific value of the mass difference and the opening size of the first valve 420 is established. When the specific mass difference is measured, the specific opening size can be obtained. The actual corresponding relationship can be obtained by theoretical calculation, computer simulation, experience summary and actual testing. After the initial opening is determined, the opening of the first valve 420 can be adjusted according to the state of the liquid discharged from the reverse osmosis membrane element 20 during the cleaning process. For example, when the liquid discharged from the reverse osmosis membrane element 20 gradually becomes clear, it indicates that the pollutants in the membrane are reduced and the resistance is reduced. The opening of the first valve 420 can be opened small, and flushing is carried out with a large flow and a large pressure, that is, the clearer the liquid becomes, the smaller the opening of the first valve 420 is adjusted. Of course, the opening of the first valve 420 can also be adjusted according to the pressure detected by the pressure sensor 72 described below.

[0069] In some embodiments, the reverse osmosis membrane cleaning equipment includes a pressure sensor 72 capable of detecting liquid pressure, and the pressure sensor 72 is used to determine the liquid pressure received by the reverse osmosis membrane element 20. Generally, the greater the pressure, the more serious the blockage of the reverse osmosis membrane element 20. The opening of the first valve 420 is positively correlated with the pressure value detected by the pressure sensor 72. The greater the pressure value, the first valve 420 needs to be appropriately adjusted to reduce the pressure received by the reverse osmosis membrane. The pressure sensor 72 can be arranged in the second pipeline 41, and the liquid pressure in the reverse osmosis membrane element 20 can be determined by detecting the hydraulic pressure in the second pipeline 41. Preferably, the pressure sensor 72 is arranged on the pipeline directly connected to the second pipeline 41 and the reverse osmosis membrane element 20 to improve the accuracy of pressure detection. The first valve 420 can be a manual valve or an automatic valve (for example, electric or pneumatic or hydraulic). When the first valve 420 is a manual valve, the staff manually adjusts the opening of the first valve 420 according to the detection result of the pressure sensor 72. When the first valve 420 is an automatic valve, it automatically controls the opening according to the detection result of the pressure sensor 72 to achieve intelligent pressure regulation. Figure 6 and Figure 7 The reverse osmosis membrane cleaning equipment includes a control box 71, which includes a controller 710 (such as a PLC or a single-chip microcomputer, etc.). The control box 71 is electrically connected to the first valve 420 and the pressure sensor 72. The first valve 420 is controlled to operate according to the detection result of the pressure sensor 72 to adjust the opening, and then the pressure is automatically controlled according to the pressure applied to the reverse osmosis membrane element 20.

[0070] Similarly, a mapping relationship can be established between the detection result of the pressure sensor 72 and the opening of the first valve 420 through theoretical calculation, computer simulation, experience summary or actual testing, so as to adjust the opening of the first valve 420 according to the detection result of the pressure sensor 72.

[0071] It is understandable that the number of pressure sensors 72 is not limited to one, and pressure sensors 72 may be provided at different locations of the second pipeline 41, and the opening of the first valve 420 may be adjusted according to the detection results of one or more pressure sensors 72. Optionally, different weights may be assigned in combination with the positions of the pressure sensors 72, so as to obtain a more accurate pressure through comprehensive calculation.

[0072] In some embodiments, the connection between the third pipeline 42 and the medicine container 1 is higher than the liquid level of the cleaning agent in the medicine container 1 in the initial state, and the liquid in the third pipeline 42 can flow back into the medicine container 1 from above the liquid level 1a of the medicine container 1. The initial state refers to the state after the cleaning agent is placed and the cleaning work has not yet started. In other embodiments, the third pipeline 42 is provided with a one-way valve that only allows the liquid to flow toward the medicine container 1. At this time, even if the third pipeline 42 is located below the liquid level 1a of the cleaning agent, when the first valve 420 is opened, the liquid in the medicine container 1 will not flow from the third pipeline 42 to the second pipeline 41, which is conducive to reducing the resistance during reflux and ensuring the reliable regulation of the pressure in the pipeline by the first valve 420. It can be understood that even if the third pipeline 42 is located above the liquid level of the cleaning agent, a one-way valve can be provided.

[0073] In some embodiments, reference Figure 1 and Figure 2 The reverse osmosis membrane cleaning device further includes a filter 5. The filter 5 and the reverse osmosis membrane element 20 are both arranged on the second pipeline 41, and the two are connected in series. The liquid transported by the liquid transport device 3 enters the reverse osmosis membrane element 20 after passing through the filter 5. The filter 5 can filter particles and impurities in the liquid, thereby preventing the particles from entering the reverse osmosis membrane element 20 again, which is beneficial to improving the cleaning effect and efficiency and preventing clogging and damage to the reverse osmosis membrane 20c.

[0074] like Figure 1 , Figure 3 and Figure 8 As shown, the second pipeline 41 includes a first pipeline 410 connected between the liquid outlet 31 of the liquid delivery device 3 and the filter 5, and a second pipeline 411 connected between the filter 5 and the first end 200 of the reverse osmosis membrane element 20. Optionally, a pressure sensor 72 for detecting liquid pressure is provided in the filter 5 and / or the second pipeline 411.

[0075] Optionally, the second pipeline 41 is connected between the liquid outlet 31 and the reagent container 1 to realize the recycling of the cleaning agent. The second pipeline 41 also includes a third pipeline 412 connecting the reagent container 1 and the second end 201 of the reverse osmosis membrane element 20. The liquid in the reverse osmosis membrane element 20 after cleaning is discharged from the second end 201 and enters the third pipeline 412, and returns to the reagent container 1. In this way, the cleaning agent is continuously circulated in the pipeline system, and the cleaning agent can be fully utilized. Since the second pipeline 41 is provided with a filter 5, even if the liquid in the reagent container 1 contains impurities such as particulate matter after cleaning for a period of time, it can be reliably filtered by the filter 5 to ensure the cleaning effect.

[0076] In some embodiments, the third pipeline 42 is connected between the first pipeline 410 and the medicine container 1, that is, the third pipeline 42 is located in front of the filter 5, and the liquid delivered from the liquid delivery device 3 can directly flow back into the medicine container 1 instead of entering the filter 5 first, which is conducive to reducing the working intensity of the filter 5 and improving its service life. In other embodiments, the third pipeline 42 can also be set between the second pipeline 411 and the medicine container 1. In this case, the medicine is filtered by the filter 5 and then flows back into the medicine container 1.

[0077] In some embodiments, the third pipe 412 is configured to be able to observe the liquid entering the reagent container 1 from the outside, and the cleaning condition of the reverse osmosis membrane element 20 can be judged by observing the color and other conditions of the liquid discharged from the third pipe 412. In the early stage of cleaning, the liquid discharged from the third pipe 412 is usually turbid or even black. As the cleaning work proceeds, the liquid discharged from the third pipe 412 gradually becomes clean and transparent (i.e., becomes clearer). According to the condition of the liquid discharged from the third pipe 412, the contamination condition of the reverse osmosis membrane element 20 and the progress of cleaning can be judged. In addition, according to the color and turbidity of the liquid, it can be judged whether it is necessary to replace different types of cleaning agents to perform targeted cleaning corresponding to different pollutants.

[0078] For example, Figure 1 and Figure 2 As shown, the upper end of the medicine container 1 is provided with an opening 10, and the outlet of the third pipe 412 is located above the liquid level of the cleaning agent in the medicine container 1. When the liquid is discharged from the third pipe 412 into the medicine container 1, the liquid between the outlet of the third pipe 412 and the liquid level 1a can be observed. Optionally, the outlet of the third pipe 412 is located above the opening 10 of the medicine container 1, and there is a sufficient distance between the liquid discharged from the third pipe 412 and the liquid level 1a, so that the discharged liquid can be conveniently observed. It can be understood that the cleaning agent in the medicine container 1 can also be seen from the opening 10, so as to judge whether it is necessary to replace the new cleaning agent according to the state of the cleaning agent, so as to ensure the progress of the cleaning work. Of course, the medicine container 1 can also be set to be transparent or partially transparent, so as to observe the cleaning agent inside. In other embodiments, the third pipe 412 can also be partially or completely made of transparent material, and the liquid situation in the third pipe 412 can be observed through the transparent part.

[0079] In some embodiments, Figure 7 and Figure 8As shown, the second pipeline 411 includes a branch pipeline 4110 connected to the reverse osmosis membrane element 20, and the second pipeline 41 includes a connection mechanism 43 for accessing the reverse osmosis membrane element 20. The number of the connection mechanisms 43 is multiple, so as to access multiple reverse osmosis membrane elements 20 for simultaneous cleaning. The multiple reverse osmosis membrane elements 20 are connected in parallel, and the first end 200 of each reverse osmosis membrane element 20 is connected to the second pipeline 411, rather than being connected end to end. In this way, the cleaning agent can directly enter each reverse osmosis membrane element 20 for cleaning, and the cleaning effect is better and the efficiency is higher. Each reverse osmosis membrane element 20 is correspondingly provided with a branch pipeline 4110 and a third pipeline 412, and each of the branch pipelines 4110 is provided with at least one second valve 4111 with adjustable opening size. In the illustrated embodiment, the second pipeline 41 can fix six reverse osmosis membrane elements 20, and the bottom of each reverse osmosis membrane element 20 is correspondingly provided with a branch pipeline 4110, and the top is correspondingly provided with a third pipeline 412.

[0080] The second valve 4111 can control the flow rate into the corresponding reverse osmosis membrane element 20, and then adjust the liquid pressure of the corresponding reverse osmosis membrane element 20. Since the pollution conditions of the reverse osmosis membrane elements 20 are different, by adjusting the second valve 4111, each reverse osmosis membrane element 20 can be cleaned at different flow rates and pressures, and the cleaning is more targeted. For example, a reverse osmosis membrane element 20 with less blockage can be cleaned with a larger flow rate and pressure, and a reverse osmosis membrane element 20 with more serious blockage can be cleaned with a smaller flow rate and pressure. In addition, when there is no reverse osmosis membrane element 20 at a position where a reverse osmosis membrane element 20 is connected, the second valve 4111 can be closed to ensure that the reverse osmosis membrane cleaning equipment can still work normally. For example, when there are only five reverse osmosis membrane elements 20 that need to be cleaned, one of the six valves, a second valve 4111, can be closed to achieve the cleaning of the five reverse osmosis membrane elements 20.

[0081] The second valve 4111 can also be manual or automatic. When the second valve 4111 is an automatic valve, it can be electrically connected to the controller 710 to operate under the control of the controller 710. Optionally, a pressure sensor 72 (for example, disposed in the cavity 4310 of the first connection cover 431 described below) is correspondingly disposed at the first end 200 of each reverse osmosis membrane element 20 to specifically adjust the pressure of each reverse osmosis membrane element 20.

[0082] When a pressure sensor 72 is correspondingly provided at the first end 200 of each reverse osmosis membrane element 20, the liquid pressure conditions of the plurality of reverse osmosis membrane elements 20 as a whole can be determined according to the detection results of one or more of the pressure sensors 72, and then the opening of the first valve 420 can be adjusted. For example, different weights can be assigned in combination with the positions of the pressure sensors 72, so as to obtain the overall pressure conditions by comprehensive calculation. The first valve 420 can adjust the liquid pressure of each reverse osmosis membrane element 20 as a whole, and the second valve 4111 can adjust the liquid pressure of the corresponding reverse osmosis membrane element 20. It is understandable that pressure sensors 72 can be provided in the pipe of the second pipeline 41 and the cavity 4310 of the first connecting cover 431, so as to facilitate comprehensive judgment and adjustment.

[0083] In some embodiments, the first end 200 of the reverse osmosis membrane element 20 is the water outlet end when the reverse osmosis membrane element 20 performs filtering work, and the second end 201 of the reverse osmosis membrane element 20 is the water inlet end when the reverse osmosis membrane element 20 performs filtering work. When performing filtering work, the reverse osmosis membrane element 20 is usually connected in series in a pipeline system to work. Since the concentrated water produced by the reverse osmosis membrane element 20 flows backward, the pollution situation is usually more serious as it flows backward, which makes the pollution degree of the water outlet end of the reverse osmosis membrane element 20 when performing filtering work usually more serious than that of its water inlet end. The water outlet end of the reverse osmosis membrane element 20 when performing filtering work is set as the first end 200 of the reverse osmosis membrane element 20 (i.e., the water inlet end during cleaning), so that the cleaning agent can first contact with the more seriously polluted part of the reverse osmosis membrane element 20, give full play to the cleaning effect of the cleaning agent, and perform cleaning work more efficiently.

[0084] In some embodiments, when the reverse osmosis membrane element 20 is cleaned, the end of the central tube 20b located at the first end 200 is blocked, so that the cleaning agent can pass more through the gap between the reverse osmosis membrane sheets to form a parallel shear water flow, effectively improving the cleaning effect. Exemplarily, the reverse osmosis membrane cleaning device includes a plug 203 that blocks the central tube 20b, and the plug 203 blocks the end of the central tube 20b located at the first end 200. Optionally, the plug 203 is at least partially inserted into the central tube 20b.

[0085] In some embodiments, Figure 2As shown, the reverse osmosis membrane element 20 is vertically arranged (i.e., arranged along the Z direction in the figure) when cleaning, with its first end 200 at the bottom and the second end 201 at the top, and the cleaning agent is passed upward from the bottom thereof, and then discharged into the agent container 1 from the top. In this way, the reverse osmosis membrane element 20 can be cleaned more fully and the cleaning effect is better. It can be understood that some reverse osmosis membrane elements 20 are placed horizontally when performing filtering work. Under the action of gravity, pollutants are usually deposited on the lower side of the radial direction. If the reverse osmosis membrane element 20 is still placed horizontally when cleaning the reverse osmosis membrane element 20, the cleaning agent is more inclined to pass through the place where the blockage is better, resulting in poor cleaning effect on the part with serious blockage. In addition, the cleaning agent may not be able to completely immerse the reverse osmosis membrane 20c under the action of gravity, so that the cleaning effect on the part close to the upper end of the reverse osmosis membrane 20c is not ideal. By vertically arranging the reverse osmosis membrane element 20, it is conducive to more fully and comprehensively cleaning each part of the reverse osmosis membrane element 20.

[0086] In some embodiments, Fig. 9 and Fig.10 As shown, the connection mechanism 43 includes a first connection cover 431 for detachably connecting to the first end 200 of the reverse osmosis membrane element 20 and a second connection cover 432 for detachably connecting to the second end 201 of the reverse osmosis membrane element 20 .

[0087] The first connection cover 431 and the second connection cover 432 each include a cavity 4310 and an outer ring portion 4311 for enclosing the outer periphery of the reverse osmosis membrane element 20. The outer ring portion 4311 can realize the horizontal positioning of the reverse osmosis membrane element 20, and is sealed and connected with the outer wall of the reverse osmosis membrane element 20 to prevent water leakage. In some embodiments, a sealing ring 4312 is provided on the inner wall of the outer ring portion 4311, and sealing is achieved by matching the sealing ring 4312 with the reverse osmosis membrane element 20.

[0088] The cavity 4310 of the first connection cover 431 is connected to the second pipe 411 of the second pipeline 41, specifically, connected to the branch pipe 4110, the liquid in the branch pipe 4110 enters the cavity 4310, and then enters the reverse osmosis membrane element 20, and the liquid after cleaning the reverse osmosis membrane element 20 enters the cavity 4310 of the second connection cover 432. The cavity 4310 of the second connection cover 432 is connected to the third pipe 412, and the third pipe 412 discharges the liquid discharged from the reverse osmosis membrane element 20 into the medicine container 1. Preferably, the internal space 43100 of the cavity 4310 is at least partially arranged opposite to the area between the central pipe 20b and the outer shell 20a, so as to enter the reverse osmosis membrane element 20 from the area between the central pipe 20b and the outer shell 20a.

[0089] Optional, reference Fig.10The sealing ring 4312 is provided with a convex ring 4314 located outside the outer ring portion 4311, and the convex ring 4314 is arranged opposite to the end face 4315 of the outer ring portion 4311. When the reverse osmosis membrane element 20 is connected to the connection cover, the convex ring 4314 will deform outward when it contacts the reverse osmosis membrane element 20, so that the reverse osmosis membrane element 20 can be reliably connected to the connection cover and sealed, and the convex ring 4314 can improve the sealing effect. Optionally, the convex ring 4314 fits the end face 4315 of the outer ring portion 4311.

[0090] The first connection cover 431 and the second connection cover 432 both include a support plate 4313, the support plate 4313 is connected to the outer ring portion 4311, and the cavity 4310 and the outer ring portion 4311 are respectively located on both sides of the support plate 4313. The support plate 4313 is used to abut against the end of the reverse osmosis membrane element 20 to limit the reverse osmosis membrane element 20. Specifically, the support plate 4313 of the first connection cover 431 abuts against the first end 200 of the reverse osmosis membrane element 20 to support the reverse osmosis membrane element 20. When the reverse osmosis membrane element 20 is vertically arranged, the reverse osmosis membrane element 20 can be placed in the first connection cover 431 to achieve positioning, and then the second connection cover 432 can be installed. The support plate 4313 of the second connection cover 432 abuts against the second end 201 of the reverse osmosis membrane element 20.

[0091] like Fig.11 As shown, the space enclosed by the outer ring portion 4311 forms an insertion port 43110 for inserting the reverse osmosis membrane element 20. It is understandable that when the reverse osmosis membrane element 20 is arranged vertically, the insertion port 43110 of the first connection cover 431 can be arranged upward, and the insertion port 43110 of the second connection cover 432 can be arranged downward so that the reverse osmosis membrane element 20 can be arranged vertically and is easy to install.

[0092] It is understandable that a sealing gasket may be provided between the end of the reverse osmosis membrane element 20 and the support plate 4313 to improve the sealing effect.

[0093] like Figure 2 and Figure 3As shown, the reverse osmosis membrane cleaning device also includes a pressing mechanism 6 for driving the first connection cover 431 and the second connection cover 432 to press the two ends of the reverse osmosis membrane element 20, and the pressing mechanism 6 includes a movable frame 61 connected to the fixed frame 60 and the second connection cover 432, and a linear drive device 62 connected between the fixed frame 60 and the movable frame 61. The first connection cover 431 is relatively fixed to the fixed frame 60, for example, it can be directly connected to the fixed frame 60. The first connection cover 431 and the second connection cover 432 are slidably matched with the reverse osmosis membrane element 20, and can move relative to the reverse osmosis membrane element 20 along the axial direction of the reverse osmosis membrane element 20. The linear drive device 62 is used to drive the movable frame 61 to move along the axial direction of the reverse osmosis membrane element 20 (i.e., the center line of the central tube 20b) of the reverse osmosis membrane element 20, so that the second connection cover 432 is sleeved on the reverse osmosis membrane element 20, and cooperates with the first connection cover 431 to clamp the reverse osmosis membrane element 20. When the second connection cover 432 rises to be separated from the reverse osmosis membrane element 20, the reverse osmosis membrane element 20 can be taken out.

[0094] The linear drive device 62 can be, for example, a cylinder, an electric cylinder, a hydraulic cylinder or the like, or a device that realizes a linear drive function by a motor in cooperation with a transmission structure (such as a belt drive, a chain drive, a connecting rod drive, etc.). In the drawings shown in the present application, the linear drive device 62 is a hydraulic cylinder, whose body 620 is fixedly connected to the fixed frame 60, and the drive shaft 621 is connected to the movable frame 61, and drives the movable frame 61 and the second connection cover 432 to move through telescopic movement. When the reverse osmosis membrane element 20 is vertically arranged, the linear drive device 62 drives the second connection cover 432 to perform a lifting movement, that is, to move in the vertical direction.

[0095] Optionally, the linear drive device 62 is electrically connected to the controller 710, and the controller 710 adjusts the driving force of the linear drive device 62 according to the liquid pressure on the reverse osmosis membrane element 20. For example, when the pressure sensor 72 detects that the pressure in the second pipeline 41 increases, it indicates that the liquid pressure on the reverse osmosis membrane element 20 increases. At this time, the controller 710 controls the linear drive device 62 to increase the driving force to press the second connection cover 432 to achieve a reliable sealing connection and prevent liquid leakage. Conversely, when the pressure in the pipeline decreases, the driving force to press the second connection cover 432 can be reduced to prevent damage due to excessive pressing force. When there are multiple pressure sensors 72, the overall liquid pressure can be calculated and determined based on the detection results of one or more pressure sensors 72, and then the driving force of the linear drive device 62 is controlled.

[0096] In some embodiments, at least two groups of connection mechanisms 43 are correspondingly arranged on both sides of the medicine container 1, and at least two groups of connection mechanisms 43 are arranged along the extension direction of the corresponding side of the medicine container 1. Dividing a plurality of connection mechanisms 43 into two groups and arranging them on both sides of the medicine container 1 can reasonably utilize space, increase the number of reverse osmosis membrane elements 20 that can be cleaned at the same time, and thus improve the working efficiency of the reverse osmosis membrane cleaning equipment. Figure 7 In the illustrated embodiment, the medicine container 1 is rectangular, and at least two groups of connecting mechanisms 43 are provided at both ends of the width direction Y. In the illustrated embodiment, the number of connecting mechanisms 43 is specifically six groups, which are symmetrically arranged on both sides of the medicine container 1, and can simultaneously fix six reverse osmosis membrane elements 20 for cleaning.

[0097] In order to improve the fixing effect, the number of the linear drive device 62 can be two or more. In some embodiments, such as Figure 2 and Figure 7 As shown, at least one linear drive device 62 is provided at both ends of the medicine container 1 in the length direction X, and the movable frame 61 is located directly above the medicine container 1 and is connected to all the linear drive devices 62 , thereby improving the stability of the movable frame 61 .

[0098] Optionally, the movable frame 61 is connected to the second connection covers 432 of more than two groups of connection mechanisms 42 at the same time, and multiple reverse osmosis membrane elements 20 can be connected through one movable frame 61. In the illustrated embodiment, the movable frame 61 is connected to the second connection covers 432 of all the connection mechanisms 42. In other embodiments, the movable frame 61 can be connected to only one second connection cover 432.

[0099] In some embodiments, the liquid delivery device 3 and the filter 5 are both located at the same end of the length direction X of the medicine container 1 and are fixedly connected to the fixing frame 60. Fig.12 As shown, the control box 71 of the reverse osmosis membrane cleaning equipment and the liquid delivery device 3 and the filter 5 are located at the same end of the length direction X of the medicine container 1, and the liquid delivery device 3 is located between the control box 71 and the filter 5 to reasonably utilize the space and make the equipment more compact.

[0100] In some embodiments, reference Figure 8 The second pipeline 411 includes a main pipeline 4112 and two branch pipelines 4113 connected to the main pipeline 4112. The two branch pipelines 4113 extend to the bottom of the connection mechanism 43 on both sides of the reagent container 1, respectively, so as to transport the cleaning agent to the reverse osmosis membrane elements 20 on both sides. The branch pipeline 4110 is connected to the branch pipeline 4113. The pressure sensor 72 can be arranged on the main pipeline 4112 and / or the branch pipeline 4113 and / or the branch pipeline 4110.

[0101] To facilitate drainage, refer to Figure 8and Fig.12 The end of each branch pipe 4113 is provided with a drain port 4114 and a first drain valve 4115 provided at the drain port 4114. The liquid remaining in the reverse osmosis membrane element 20 and the pipeline can be drained by opening the first drain valve 4115. The bottom of the medicine container 1 is provided with a drain pipe 11 and a second drain valve 12 provided on the drain pipe 11. The liquid in the medicine container 1 can be drained by opening the second drain valve 12.

[0102] In some embodiments, the second pipeline 41 between the reverse osmosis membrane element 20 and the filter 5 is provided with a gas interface 70, and the gas interface 70 is used to connect to an external gas input device 73, and the gas input device 73 can generate gas with adjustable pressure. The gas input device 73 can be, for example, a gas circuit provided by the workshop, or a variable frequency air compressor. After the gas generated by the gas input device 73 enters the cleaning agent, bubbles that impact the reverse osmosis membrane 20c can be generated, thereby improving the cleaning effect.

[0103] The pressure of the gas generated by the gas input device 73 can be adjusted according to the liquid pressure on the reverse osmosis membrane element 20. When the liquid pressure on the reverse osmosis membrane element 20 decreases, the gas pressure generated by the gas input device 73 increases to improve the cleaning effect. When the liquid pressure on the reverse osmosis membrane element 20 increases, the gas pressure generated by the gas input device 73 decreases to prevent damage to the reverse osmosis membrane 20c. As described above, the liquid pressure on the reverse osmosis membrane element 20 can be adjusted by the pressure sensor 72 provided in the second pipeline 41 and / or the filter 5.

[0104] Optionally, each reverse osmosis membrane element 20 is independently fed with gas, for example, a gas interface 70 may be provided on each branch pipe 4110, and the gas interface 70 is connected to an independent variable frequency air compressor or gas circuit, and during the cleaning process, the gas pressure fed into the reverse osmosis membrane element 20 is independently adjusted according to the liquid pressure input into the reverse osmosis membrane element 20. It is understandable that the contamination conditions of the reverse osmosis membrane elements 20 are different, and by independently adjusting the gas pressure fed into each reverse osmosis membrane element 20, the cleaning efficiency and cleaning effect of each reverse osmosis membrane element 20 can be improved.

[0105] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A reverse osmosis membrane cleaning device, characterized in that: include: A reagent container (1) for storing a cleaning reagent; Liquid delivery device (3); as well as, A pipeline assembly (4), comprising a first pipeline (40) connected between the medicine container (1) and a liquid inlet end (30) of the liquid delivery device (3), a second pipeline (41) connected to a liquid outlet end (31) of the liquid delivery device (3), and a third pipeline (42) connected between the second pipeline (41) and the medicine container (1), wherein the third pipeline (42) is provided with a first valve (420) with an adjustable opening size; The reverse osmosis membrane element (20) to be cleaned is arranged on the second pipeline (41), and the reverse osmosis membrane element (20) has a first end (200) for the entry of a cleaning agent and a second end (201) for the discharge of liquid inside the reverse osmosis membrane element (20). The liquid pressure applied to the reverse osmosis membrane element (20) is adjusted by controlling the opening of the first valve (420).

2. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: adjusting the initial opening of the first valve (420) by the mass difference before and after the reverse osmosis membrane element (20) performs filtering work, wherein the initial opening is positively correlated with the magnitude of the mass difference; Subsequently, the opening of the first valve (420) is adjusted according to the state of the liquid discharged from the reverse osmosis membrane element (20) during the cleaning process. The clearer the liquid becomes, the smaller the opening of the first valve (420) is adjusted.

3. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: It also includes a pressure sensor (72) for determining the liquid pressure to which the reverse osmosis membrane element (20) is subjected, and the opening of the first valve (420) is controlled according to the detection result of the pressure sensor (72), and the opening of the first valve (420) is positively correlated with the pressure value detected by the pressure sensor (72); The pressure sensor (72) is arranged on the second pipeline (41).

4. The reverse osmosis membrane cleaning device according to claim 3, characterized in that: The first valve (420) is a manual valve; or, The first valve (420) is an automatic valve. The reverse osmosis membrane cleaning device further comprises a controller (710) electrically connected to the first valve (420) and the pressure sensor (72). The controller (710) controls the first valve (420) to adjust its opening according to a signal from the pressure sensor (72).

5. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: The connection point between the third pipeline (42) and the medicine container (1) is higher than the liquid level of the cleaning agent in the medicine container (1) in the initial state; and / or, The third pipeline (42) is provided with a one-way valve that only allows the liquid to flow toward the medicine container (1).

6. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: It also includes a filter (5), the reverse osmosis membrane element (20) and the filter (5) are both arranged on the second pipeline (41), and the cleaning agent conveyed by the liquid conveying device (3) passes through the filter (5) and then enters the reverse osmosis membrane element (20); The second pipeline (41) is connected between the liquid outlet (31) and the medicine container (1), and comprises a first pipeline (410) connected between the liquid outlet (31) and the filter (5), a second pipeline (411) connected between the filter (5) and the first end (200) of the reverse osmosis membrane element (20), and a third pipeline (412) connecting the medicine container (1) and the second end (201) of the reverse osmosis membrane element (20).

7. The reverse osmosis membrane cleaning device according to claim 6, characterized in that: The third pipeline (42) is connected between the first pipeline (410) and the medicine container (1).

8. The reverse osmosis membrane cleaning device according to claim 6, characterized in that: The third pipe (412) is configured to enable the liquid entering the medicine container (1) to be observed from the outside; The upper end of the medicine container (1) is provided with an opening (10), and the outlet of the third pipe (412) is arranged corresponding to the opening (10) and is located above the liquid level (1a) of the cleaning agent in the medicine container (1); and / or, The third pipe (412) is partially or entirely made of transparent material.

9. The reverse osmosis membrane cleaning device according to claim 6, characterized in that: The second pipeline (41) between the reverse osmosis membrane element (20) and the filter (5) is provided with a gas interface (70), and the gas interface (70) is used to be connected to an external gas input device (73), and the gas input device (73) can generate gas with adjustable pressure; The pipeline assembly (4) also includes a controller (710) electrically connected to the gas input device (73), and the controller (710) controls the gas input device (73) to adjust the gas pressure according to the liquid pressure applied to the reverse osmosis membrane element (20), and the gas pressure generated by the gas input device (73) is negatively correlated with the liquid pressure applied to the reverse osmosis membrane element (20).

10. The reverse osmosis membrane cleaning device according to claim 6, characterized in that: The second pipeline (411) includes a branch pipeline (4110) communicating with the reverse osmosis membrane element (20); The second pipeline (41) comprises a connection mechanism (43) for connecting to the reverse osmosis membrane element (20), and the number of the connection mechanisms (43) is multiple so as to connect to multiple reverse osmosis membrane elements (20). The multiple reverse osmosis membrane elements (20) are connected in parallel, and each of them is correspondingly provided with a branch pipeline (4110) and a third pipeline (412), and each of the branch pipelines (4110) is provided with at least one second valve (4111) with an adjustable opening size.

11. The reverse osmosis membrane cleaning device according to any one of claims 1 to 10, characterized in that: The first end (200) of the reverse osmosis membrane element (20) is the water outlet end when the reverse osmosis membrane element (20) performs filtering work, and the second end (201) of the reverse osmosis membrane element (20) is the water inlet end when the reverse osmosis membrane element (20) performs filtering work.

12. The reverse osmosis membrane cleaning device according to any one of claims 1 to 10, characterized in that: The reverse osmosis membrane element (20) comprises a shell (20a), a central tube (20b), and a reverse osmosis membrane (20c) located between the shell (20a) and the central tube (20b); When the reverse osmosis membrane element (20) is cleaned, the end of the central tube (20b) of the reverse osmosis membrane element (20) located at the first end (200) is blocked; The reverse osmosis membrane cleaning device comprises a plug (203) for plugging a central tube (20b) of the reverse osmosis membrane element (20); The reverse osmosis membrane element (20) is arranged vertically, and the second end (201) is located above the first end (200).

13. The reverse osmosis membrane cleaning device according to any one of claims 1 to 10, characterized in that: The second pipeline (41) comprises a connection mechanism (43) for connecting to the reverse osmosis membrane element (20), the connection mechanism (43) comprising a first connection cover (431) for detachably connecting to the first end (200) of the reverse osmosis membrane element (20) and a second connection cover (432) for detachably connecting to the second end (201) of the reverse osmosis membrane element (20), the first connection cover (431) and the second connection cover (432) both comprising a cavity (4310) and an outer ring portion (4311) for enclosing the outer periphery of the reverse osmosis membrane element (20); The outer ring portion (4311) is sealedly connected to the outer wall of the reverse osmosis membrane element (20); The cavity (4310) of the first connecting cover (431) is connected to the second pipeline (41), and the cavity (4310) of the second connecting cover (432) is connected to a third pipeline (412), and the third pipeline (412) is used to discharge the liquid coming out of the reverse osmosis membrane element (20) into the medicine container (1).

14. The reverse osmosis membrane cleaning device according to claim 13, characterized in that: The first connection cover (431) and the second connection cover (432) both include a support plate (4313) connected to the outer ring portion (4311), the cavity (4310) and the outer ring portion (4311) are respectively located on both sides of the support plate (4313), and the support plate (4313) is used to abut against the end of the reverse osmosis membrane element (20) to limit the reverse osmosis membrane element (20).

15. The reverse osmosis membrane cleaning device according to claim 13, characterized in that: It also includes a pressing mechanism (6) for driving the first connecting cover (431) and the second connecting cover (432) to press the two ends of the reverse osmosis membrane element (20); The clamping mechanism (6) comprises a fixed frame (60), a movable frame (61) connected to the second connection cover (432), and a linear drive device (62) connected between the fixed frame (60) and the movable frame (61), the first connection cover (431) and the fixed frame (60) are relatively fixed, the second connection cover (432) and the reverse osmosis membrane element (20) are slidably matched, and the linear drive device (62) is used to drive the movable frame (61) to move along the axial direction of the reverse osmosis membrane element (20) so that the second connection cover (432) is sleeved on the reverse osmosis membrane element (20); The linear drive device (62) is electrically connected to the controller (710) of the reverse osmosis membrane cleaning device, and the controller (710) adjusts the driving force of the linear drive device (62) according to the liquid pressure applied to the reverse osmosis membrane element (20).

16. The reverse osmosis membrane cleaning device according to claim 15, characterized in that: At least two sets of connection mechanisms (43) are provided at both ends of the medicine container (1) in the width direction; At least one linear drive device (62) is provided at both ends of the medicine container (1) in the length direction, and the movable frame (61) is located directly above the medicine container (1); The movable frame (61) is simultaneously connected to the second connection covers (432) of at least two groups of the connection mechanisms (43).

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