A kind of auxiliary ejection device and replacement method facilitating the removal of reverse osmosis membrane element

Abstract

The present application relates to reverse osmosis water treatment equipment maintenance technical field, disclose a kind of auxiliary ejection device and replacement method convenient to remove reverse osmosis membrane element, including pressure block, connecting rod and operating component, the pressure block center is provided with the installation hole being penetrated along axial direction, the connecting rod is passed in the installation hole, and the connecting rod can be axially slid along the installation hole, one end of the connecting rod located in the inside of the pressure block is equipped with the push end for sticking and pushing reverse osmosis membrane element, one end of the connecting rod located in the outside of the pressure block is connected with the operating component.The present application is based on the coaxial pressure structure of original equipment block modification, coaxial installation hole is opened in central position, and is cooperatively arranged with internal reinforcing rib, so that ejection device can be directly connected to the sealing interface of existing reverse osmosis equipment, complete functional modification under the premise that membrane shell main body and overall pipeline layout are not changed, ensure the original pressure sealing performance.

Description

Technical Field

[0001] This invention relates to the field of reverse osmosis water treatment equipment maintenance technology, specifically to an auxiliary ejection device and replacement method for facilitating the removal of reverse osmosis membrane elements. Background Technology

[0002] Reverse osmosis technology is widely used in the field of water treatment. After long-term operation, reverse osmosis equipment needs to regularly disassemble and replace the reverse osmosis membrane elements inside the membrane housing due to scaling, fouling or aging on the membrane surface. When installed, the reverse osmosis membrane elements are usually tightly fitted to the inner wall of the membrane housing and are subjected to high-pressure water flow for a long time. The frictional resistance between the sealing ring of the membrane element and the inner wall of the membrane housing is extremely high, making disassembly very difficult.

[0003] In the existing dismantling operations, there is a lack of professional auxiliary equipment that can directly interface with the original equipment. When dismantling the old membrane, it is difficult for operators to find a stable load-bearing foundation. The existing jacking tools cannot effectively reuse the original pressure-bearing sealing structure of the equipment, resulting in a lack of reliable static support when using external tools to apply thrust. This not only increases the difficulty of operation, but also makes it difficult to establish a stable power transmission base without damaging the integrity of the original pipeline system.

[0004] When performing specific power unloading, existing tools rely on local pushing or prying to transmit force. Due to the lack of physical constraints on the movement trajectory of the force transmission components, the applied thrust is difficult to maintain a pure axial straight line transmission, causing the force to deviate from the center line of the membrane shell. This causes the reverse osmosis membrane element to tilt or get stuck during the removal process, resulting in scratches on the end face of the membrane element and mechanical wear on the inner wall of the membrane shell.

[0005] Traditional replacement processes lack standardized operating procedures and rely mainly on manual experience. Faced with huge system frictional resistance, multiple operators need to work together to operate blindly, making it difficult to achieve smooth control of the disassembly process. Applying strong force can easily cause tools to slip, posing safety hazards to on-site personnel and reducing the overall efficiency of reverse osmosis membrane element disassembly and assembly. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an auxiliary ejection device and replacement method for easy disassembly of reverse osmosis membrane elements. This solves the problems of existing reverse osmosis membrane element disassembly processes, such as the lack of a stable support for direct connection with the equipment interface, which easily damages the original pressure-bearing seal; the localized prying force displacement of traditional tools leading to scratches on the membrane element and wear on the inner wall of the membrane housing; and the safety hazard of tool slippage caused by blindly applying force with multiple people.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The first aspect of the present invention provides an auxiliary ejection device for facilitating the removal of reverse osmosis membrane elements, comprising a pressure-bearing plug, a connecting rod, and an operating component. The pressure-bearing plug has an axially penetrating mounting hole at its center. The connecting rod passes through the mounting hole and is axially slidable along the mounting hole. One end of the connecting rod located inside the pressure-bearing plug has a push end for attaching to and pushing the reverse osmosis membrane element. The other end of the connecting rod located outside the pressure-bearing plug is connected to the operating component.

[0008] Preferably, the pressure-bearing plug includes a pressure-bearing body and a flange at the bottom, the flange being used for sealing with an external diaphragm; the pressure-bearing body is provided with internal reinforcing ribs, the mounting hole is opened at the intersection center of the internal reinforcing ribs, and side openings are formed between adjacent internal reinforcing ribs.

[0009] Preferably, the operating component is an operating handle, which is vertically fixed to the outer end of the connecting rod, and the operating component and the connecting rod form a lever structure. The operating component is used to drive the connecting rod to push linearly.

[0010] Preferably, a threaded transmission structure is provided between the outer wall of the connecting rod and the inner wall of the mounting hole, and the operating component is a rotary operating handle. The operating component is connected to the connecting rod and is used to drive the connecting rod to make a helical feeding motion along the central axis of the mounting hole.

[0011] Preferably, the operating component is a hydraulic jacking assembly or a pneumatic jacking assembly, and the power output end of the hydraulic jacking assembly or the pneumatic jacking assembly is connected to the connecting rod to drive the connecting rod to perform axial telescopic movement.

[0012] A second aspect of the present invention provides a method for replacing an auxiliary ejector device that facilitates the removal of a reverse osmosis membrane element, comprising the following steps: A reverse osmosis device is provided, the reverse osmosis device including a membrane housing and a plurality of reverse osmosis membrane elements disposed inside the membrane housing; The reverse osmosis equipment is shut down and depressurized, the external pipeline and flange fittings at one end of the membrane housing are removed, and the auxiliary ejection device is installed at the other end of the membrane housing. The connecting rod is driven to move axially along the mounting hole into the membrane housing by the operating component, so that the push end head fits against the outermost reverse osmosis membrane element end face; By continuously applying driving force, all reverse osmosis membrane elements connected in series inside the membrane housing are pushed sequentially through the connecting rod, so that the reverse osmosis membrane elements are gradually moved outward from the end of the membrane housing where the auxiliary ejection device is not installed and then removed. After reversing the operation of the operating component to return the connecting rod to its initial position, the new reverse osmosis membrane element is pushed in and installed in place along the central axis of the membrane housing; The disassembled external piping and flange fittings were reinstalled, and the reverse osmosis equipment was filled with water and leak checked.

[0013] Preferably, before dismantling the external pipelines and flange fittings, the inlet valve, concentrate valve, and product water valve of the reverse osmosis equipment are closed in sequence to completely depressurize the inside of the membrane housing. Before operating the auxiliary ejection device, debris and accumulated water at both ends of the membrane housing are cleaned, and the sliding fit between the pressure-bearing plug and the connecting rod is checked to confirm that there is no jamming.

[0014] Preferably, during the continuous application of driving force to push the reverse osmosis membrane element, the thrust is applied at a uniform speed and in a straight line. When a single reverse osmosis membrane element is fully exposed at the membrane housing port, the reverse osmosis membrane element is removed manually, and the pushing action of the auxiliary ejection device is repeated to remove the reverse osmosis membrane element one by one until all the reverse osmosis membrane elements inside the membrane housing are completely removed.

[0015] Preferably, before pushing in a new reverse osmosis membrane element, apply special grease to the end of the new reverse osmosis membrane element and the sealing ring. Push the new reverse osmosis membrane element smoothly from the end of the membrane housing where the auxiliary ejection device is not installed. When the pushing resistance increases, operate the auxiliary ejection device in the forward direction and use the end of the connecting rod to assist in pushing and aligning from the other side.

[0016] Preferably, when removing multiple reverse osmosis membrane elements, the connecting rod is driven by segmented intermittent force application. That is, after pushing out and removing part of the removed reverse osmosis membrane element in segments, the process is paused to release the system frictional resistance before continuing the next segment of pushing and disassembling operation.

[0017] This invention provides an auxiliary ejection device and replacement method for facilitating the removal of reverse osmosis membrane elements. It offers the following advantages: 1. This invention is based on the original equipment plug modification coaxial pressure structure. While retaining the original pressure-bearing body and bottom flange edge of the plug, a coaxial through mounting hole is opened in the center position, and internal reinforcing ribs are set to enable the ejection device to directly connect to the sealing interface of the existing reverse osmosis equipment. The functional modification is completed without changing the membrane housing body and the overall pipeline layout, ensuring the original pressure-bearing and sealing performance.

[0018] 2. The force transmission mechanism design of this invention, which pushes along the central axis of the membrane housing, uses the mounting hole to strictly constrain the sliding trajectory of the connecting rod. Combined with the operating components connected to the outside, it transforms the disordered local prying of traditional tools into a straight thrust along the central line of the membrane housing, ensuring that the pushing end acts stably on the end face of the membrane element. From a mechanical structure perspective, it eliminates scratches on the membrane element and wear on the inner wall of the membrane housing caused by force deviation.

[0019] 3. The standardized single-person non-destructive disassembly and assembly process of this invention, relying on the above-mentioned auxiliary ejection device, establishes a standardized replacement method that includes complete depressurization after machine shutdown, axial uniform speed ejection of the old membrane, sequential disassembly of single sections, and assisted push-in alignment of the new membrane. This changes the traditional blind operation mode that relies on the coordinated efforts of multiple personnel, transforms complex on-site maintenance into a standardized procedure that can be controlled by a single person, and eliminates safety hazards caused by tool slippage. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the modified plug according to the present invention; Figure 2 This is a side-view three-dimensional structural diagram of the modified plug according to the present invention; Figure 3 This is a flowchart illustrating the replacement method of the auxiliary ejection device for easy removal of reverse osmosis membrane elements according to the present invention.

[0021] Among them, 1. mounting hole; 2. reinforcing rib; 3. side opening; 4. pressure-bearing body; 5. flange edge. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See attached document Figure 1 and attached Figure 2 The present invention provides an auxiliary ejection device for easy removal of reverse osmosis membrane elements, including a pressure-bearing plug, a connecting rod and an operating component. The pressure-bearing plug has an axially penetrating mounting hole 1 in its center. The connecting rod passes through the mounting hole 1 and can slide axially along the mounting hole 1. One end of the connecting rod located inside the pressure-bearing plug is provided with a push end for attaching and pushing the reverse osmosis membrane element. The other end of the connecting rod located outside the pressure-bearing plug is connected to the operating component. The pressure-bearing plug includes a pressure-bearing body 4 and a flange edge 5 located at the bottom. The flange edge 5 is used to seal with the external diaphragm shell. The pressure-bearing body 4 is provided with internal reinforcing ribs 2. The mounting hole 1 is opened at the intersection center of the internal reinforcing ribs 2, and a side opening 3 is formed between adjacent internal reinforcing ribs 2.

[0024] Specifically, the core working principle of this invention is based on the physical reuse and stable static support of the original pressure-bearing plug structure. In the actual field operation environment, the modified plug, retaining the flange edge 5 and the pressure-bearing body 4, is installed as a whole at the end of the reverse osmosis membrane shell. Through the tight fit between the flange edge 5 and the inner wall of the outer membrane shell, a standard sealing fit is achieved, thereby maintaining the original high-pressure environment inside the reverse osmosis equipment. When bearing the internal system pressure during equipment operation, the multiple reinforcing ribs 2 set inside the plug play a key role in dispersing the force. At the same time, reasonable space is reserved between adjacent reinforcing ribs 2 to form side openings 3 to meet the normal flow requirements of fluid inside the equipment. The reinforcing ribs 2 extend inward together, providing high-strength rigid structural support for the through installation hole 1 opened at their confluence center. This allows the entire auxiliary ejection device to be quickly assembled directly based on the existing standard equipment interface. Under the premise of strictly maintaining the original pipeline sealing performance and overall strength, it provides a stable foundation support for the mechanical power transmission in the subsequent ejection operation without deformation or displacement.

[0025] See attached document Figure 1 and attached Figure 2 The operating component is an operating handle, which is vertically fixed to the outer end of the connecting rod. The operating component and the connecting rod form a lever structure. The operating component is used to drive the connecting rod to perform linear jacking. A threaded transmission structure is provided between the outer wall of the connecting rod and the inner wall of the mounting hole 1. The operating component is a rotary operating handle, which is connected to the connecting rod and is used to drive the connecting rod to perform helical feeding motion along the central axis of the mounting hole 1. The operating component is a hydraulic jacking assembly or a pneumatic jacking assembly. The power output end of the hydraulic jacking assembly or the pneumatic jacking assembly is connected to the connecting rod and is used to drive the connecting rod to perform axial telescopic movement.

[0026] Specifically, at the operational level of power transmission and execution, this invention imposes strict and precise physical constraints on the movement trajectory of the internal force transmission components through the through mounting hole 1. When the on-site operator applies a driving force to the operating component located outside the pressure-bearing plug, the force is smoothly transmitted to the connecting rod and oriented into a pure axial linear thrust. Since the connecting rod is tightly inserted into the coaxially opened mounting hole 1, when the connecting rod is under force, it can only slide smoothly along the theoretical central axis of the diaphragm shell, limiting its radial deflection freedom.

[0027] The push end on the inner side of the connecting rod can be attached to and act on the end face of the reverse osmosis membrane element, ensuring that the push force can be continuously and evenly transmitted along the center line of the membrane shell. This fundamentally changes the blindness of local force application of traditional tools and avoids the deviation of the push direction caused by uneven manual force application, thereby greatly reducing the mechanical risks of membrane edge scratches, seal ring pressure damage and hard wear on the inner wall of the membrane shell during dismantling operations.

[0028] See attached document Figure 3 This invention provides a method for replacing an auxiliary ejector device that facilitates the removal of reverse osmosis membrane elements, comprising the following steps: Provide reverse osmosis equipment, which includes a membrane housing and multiple reverse osmosis membrane elements disposed inside the membrane housing; Shut down the reverse osmosis equipment and depressurize it. Remove the external pipeline and flange fittings at one end of the membrane housing, and retain the auxiliary ejection device at the other end of the membrane housing. The connecting rod is driven to move axially along the mounting hole 1 into the membrane housing by the operating component, so that the push end is in contact with the outermost reverse osmosis membrane element end face; By continuously applying driving force, all reverse osmosis membrane elements connected in series inside the membrane housing are pushed sequentially through the connecting rod, so that the reverse osmosis membrane elements are gradually moved outward from the end of the membrane housing without the auxiliary push-out device and removed. After the reverse operation of the operating component returns the connecting rod to its initial position, the new reverse osmosis membrane element is pushed in and installed into place along the central axis of the membrane housing; Reinstall the disassembled external piping and flange fittings, and fill and leak-test the reverse osmosis equipment.

[0029] Before dismantling the external pipelines and flange fittings, sequentially close the inlet valve, concentrate valve, and product water valve of the reverse osmosis equipment to completely depressurize the inside of the membrane housing. Before operating the auxiliary ejection device, clean the debris and accumulated water from both ends of the membrane housing, check the sliding fit between the pressure plug and the connecting rod to ensure there is no jamming, and maintain a uniform speed and linear thrust while continuously applying driving force to push the reverse osmosis membrane element. Once a single reverse osmosis membrane element is fully exposed at the membrane housing port, manually remove the reverse osmosis membrane element and repeat the pushing action of the auxiliary ejection device to dismantle each element until all reverse osmosis membrane elements inside the membrane housing have been removed.

[0030] Before pushing in a new reverse osmosis membrane element, apply special grease to the end of the new reverse osmosis membrane element and the sealing ring. Push the new reverse osmosis membrane element smoothly from the end of the membrane housing where the auxiliary push-out device is not installed. When the pushing resistance increases, operate the auxiliary push-out device in the forward direction and use the end of the connecting rod to push and align it from the other side. When removing multiple reverse osmosis membrane elements, drive the connecting rod in a segmented and intermittent manner. That is, after pushing out and removing part of the removed reverse osmosis membrane elements in segments, pause to release the system friction resistance before continuing the next segment of pushing and disassembling operation.

[0031] Specifically, the present invention provides a method for replacing an auxiliary ejector device that facilitates the removal of reverse osmosis membrane elements, comprising: A reverse osmosis (RO) system is provided, comprising a membrane housing and multiple RO membrane elements housed within it. Before disassembly begins, the inlet valve, concentrate valve, and product water valve of the RO system are closed sequentially. The interior of the membrane housing is then completely depressurized by cutting off the water flow.

[0032] After confirming that the pressure has been released, remove the external piping and flange fittings from one end of the membrane housing. Leave the auxiliary ejection device installed at the other end of the membrane housing. Before operating the auxiliary ejection device, clean any debris and water from both ends of the membrane housing. Check the sliding fit between the pressure-bearing plug and the connecting rod inside the auxiliary ejection device to ensure there is no mechanical jamming.

[0033] The connecting rod is driven to move axially into the membrane housing along the mounting hole 1 by the operating components of the auxiliary ejection device. The push end on the inner side of the connecting rod moves accordingly and comes into contact with the outermost reverse osmosis membrane element end face.

[0034] A continuous driving force is applied, using the connecting rod to sequentially push all the reverse osmosis membrane elements connected in series within the membrane housing. During the jacking operation, the thrust is applied at a constant speed in a straight line. After being subjected to force, the reverse osmosis membrane elements gradually move outward from the end of the membrane housing without the auxiliary jacking device.

[0035] Once a single reverse osmosis membrane element is fully exposed at the port of the membrane housing, it is manually removed. The jacking action of the auxiliary ejector is repeated to remove the elements one by one until all reverse osmosis membrane elements inside the membrane housing have been removed.

[0036] After dismantling is complete, reverse the operation of the components to return the connecting rod to its initial position. Before inserting the new reverse osmosis membrane element, apply special lubricant to the end of the new reverse osmosis membrane element and the sealing ring.

[0037] Smoothly push the new reverse osmosis membrane element into the membrane housing from the end without the auxiliary ejection device. When the pushing resistance increases, operate the auxiliary ejection device in the forward direction, using the push end of the connecting rod to assist in pushing and aligning from the other side.

[0038] Push all the new reverse osmosis membrane elements into place along the central axis of the membrane housing. Reinstall the previously removed external piping and flange fittings. Fill the reverse osmosis equipment with water and perform a leak test.

[0039] When dismantling multiple reverse osmosis membrane elements, the connecting rod is driven by segmented intermittent force application.

[0040] When processing long membrane housings or a large number of reverse osmosis membrane elements connected in series, the system frictional resistance between the reverse osmosis membrane elements and the inner wall of the membrane housing is at a high level.

[0041] The auxiliary ejection device is used to perform the first stage of ejection. The series of reverse osmosis membrane elements are pushed outward along the axial direction by the connecting rod.

[0042] Once the outermost part of the reverse osmosis membrane element is exposed at the membrane housing port, stop operating the auxiliary ejection device and pause applying the driving force.

[0043] The reverse osmosis membrane element that has been removed from the membrane housing port is removed manually.

[0044] During the pause in the jacking operation, the resistance and mechanical stress accumulated inside the system due to continuous friction are released.

[0045] After stress relief is completed, continue operating the auxiliary jacking device to carry out the next stage of jacking and dismantling.

[0046] Repeat the steps of segmented ejection, removal of the disassembled portion, and pause to release resistance, gradually removing the remaining reverse osmosis membrane elements inside the membrane housing.

[0047] Until all reverse osmosis membrane elements inside the membrane housing have been completely removed.

[0048] After removing all old components and installing the new reverse osmosis membrane elements, reconnect the external piping. Perform water filling and leak testing on the reverse osmosis equipment to confirm that the overall sealing condition of the equipment meets the operating standards.

[0049] Working principle: Based on the structural reuse and static support of the pressure-bearing plug, in practical applications, the modified plug, which retains the flange edge 5 and the pressure-bearing body 4, is installed at one end of the membrane shell. The flange edge 5 and the external membrane shell achieve a standard sealing fit, thereby maintaining the original pressure environment inside the reverse osmosis equipment. The reinforcing ribs 2 set inside the plug bear the system pressure, and the side openings 3 are formed between adjacent reinforcing ribs 2. The reinforcing ribs 2 provide structural support for the installation hole 1 opened at their intersection center, so that the auxiliary ejection device can be directly assembled based on the existing equipment interface. While maintaining the original pipeline sealing performance, it provides a stable foundation support for subsequent power transmission.

[0050] In terms of power transmission and execution, the present invention imposes strict physical constraints on the movement trajectory of the force transmission component through the mounting hole 1. After the operator applies force to the external operating component, the force is transmitted to the connecting rod and converted into a pure axial linear thrust. Since the connecting rod passes through the coaxially penetrating mounting hole 1, the connecting rod can only slide along the central axis of the membrane shell. The pushing end on the inner side of the connecting rod can smoothly fit against the end face of the reverse osmosis membrane element, ensuring that the thrust always acts uniformly along the center line of the membrane shell. From a mechanical structure perspective, this avoids directional deviation, membrane scratches, and wear on the inner wall of the membrane shell caused by uneven force application of traditional tools.

[0051] In specific membrane element replacement operations, the mechanical actions of the aforementioned device work in conjunction with standardized operating procedures. First, the reverse osmosis equipment is completely shut down and depressurized to eliminate the risks of pressurized operation. Then, a single operator on site continuously and uniformly applies driving force by controlling the operating components, using the connecting rod to push the internally connected membrane elements one by one from the end of the membrane housing where no device is installed, and disassembles them one by one. When pushing in a new membrane element, if the internal resistance increases, the device can also be operated in the forward direction, using the end of the connecting rod to provide auxiliary pushing and positioning alignment. This transforms the disordered force exerted by multiple people into a standardized action that can be controlled by a single person, ensuring the safety and efficiency of the disassembly and assembly operations.

Claims

1. An auxiliary ejection device for facilitating the removal of reverse osmosis membrane elements, characterized in that, The device includes a pressure-bearing plug, a connecting rod, and an operating component. The pressure-bearing plug has an axially penetrating mounting hole (1) at its center. The connecting rod passes through the mounting hole (1) and can slide axially along the mounting hole (1). One end of the connecting rod located inside the pressure-bearing plug has a push end for attaching and pushing the reverse osmosis membrane element. The other end of the connecting rod located outside the pressure-bearing plug is connected to the operating component.

2. The auxiliary ejection device for facilitating the removal of reverse osmosis membrane elements according to claim 1, characterized in that, The pressure-bearing plug includes a pressure-bearing body (4) and a flange edge (5) located at the bottom. The flange edge (5) is used to seal with the external membrane shell. The pressure-bearing body (4) is provided with internal reinforcing ribs (2). The mounting hole (1) is opened at the intersection center of the internal reinforcing ribs (2). Side openings (3) are formed between adjacent internal reinforcing ribs (2).

3. The auxiliary ejection device for facilitating the removal of reverse osmosis membrane elements according to claim 1, characterized in that, The operating component is an operating handle, which is vertically fixed to the outer end of the connecting rod. The operating component and the connecting rod form a lever structure, and the operating component is used to drive the connecting rod to push linearly.

4. The auxiliary ejection device for facilitating the removal of reverse osmosis membrane elements according to claim 1, characterized in that, A threaded transmission structure is provided between the outer wall of the connecting rod and the inner wall of the mounting hole (1). The operating component is a rotary operating handle. The operating component is connected to the connecting rod and is used to drive the connecting rod to make a spiral feeding motion along the central axis of the mounting hole (1).

5. The auxiliary ejection device for facilitating the removal of reverse osmosis membrane elements according to claim 1, characterized in that, The operating component is a hydraulic jacking assembly or a pneumatic jacking assembly. The power output end of the hydraulic jacking assembly or the pneumatic jacking assembly is connected to the connecting rod and is used to drive the connecting rod to perform axial telescopic movement.

6. A method for replacing an auxiliary ejector device that facilitates the removal of reverse osmosis membrane elements, characterized in that, An auxiliary ejection device for facilitating the removal of a reverse osmosis membrane element, as described in any one of claims 1-5, comprises the following steps: A reverse osmosis device is provided, the reverse osmosis device including a membrane housing and a plurality of reverse osmosis membrane elements disposed inside the membrane housing; The reverse osmosis equipment is shut down and depressurized, the external pipeline and flange fittings at one end of the membrane housing are removed, and the auxiliary ejection device is installed at the other end of the membrane housing. The connecting rod is driven to move axially along the mounting hole (1) into the membrane housing by the operating component, so that the push end is in contact with the outermost reverse osmosis membrane element end face; By continuously applying driving force, all reverse osmosis membrane elements connected in series inside the membrane housing are pushed sequentially through the connecting rod, so that the reverse osmosis membrane elements are gradually moved outward from the end of the membrane housing where the auxiliary ejection device is not installed and then removed. After reversing the operation of the operating component to return the connecting rod to its initial position, the new reverse osmosis membrane element is pushed in and installed in place along the central axis of the membrane housing; The disassembled external piping and flange fittings were reinstalled, and the reverse osmosis equipment was filled with water and leak checked.

7. The method for replacing the auxiliary ejector device for easy removal of reverse osmosis membrane elements according to claim 6, characterized in that, Before dismantling the external pipelines and flange fittings, the inlet valve, concentrate valve, and product water valve of the reverse osmosis equipment are closed in sequence to completely depressurize the inside of the membrane housing. Before operating the auxiliary ejection device, debris and accumulated water are cleaned from both ends of the membrane housing, and the sliding fit between the pressure-bearing plug and the connecting rod is checked to confirm that there is no jamming.

8. A method for replacing the auxiliary ejector device for easy removal of reverse osmosis membrane elements according to claim 6, characterized in that, During the continuous application of driving force to push the reverse osmosis membrane element, the thrust is applied at a constant speed and in a straight line. When a single reverse osmosis membrane element is fully exposed at the membrane housing port, the reverse osmosis membrane element is removed manually. The pushing action of the auxiliary ejection device is repeated to remove the reverse osmosis membrane elements one by one until all the reverse osmosis membrane elements inside the membrane housing are completely removed.

9. A method for replacing the auxiliary ejector device of a reverse osmosis membrane element as described in claim 6, characterized in that, Before inserting a new reverse osmosis membrane element, apply special grease to the end of the new reverse osmosis membrane element and the sealing ring. Smoothly push the new reverse osmosis membrane element into the membrane housing from the end where the auxiliary ejection device is not installed. When the pushing resistance increases, operate the auxiliary ejection device in the forward direction and use the end of the connecting rod to assist in pushing and aligning from the other side.

10. A method for replacing the auxiliary ejector device for easy removal of reverse osmosis membrane elements according to claim 6, characterized in that, When dismantling multiple reverse osmosis membrane elements, the connecting rod is driven by segmented intermittent force application. That is, after pushing out and removing part of the dismantled reverse osmosis membrane element in segments, the process is paused to release the system frictional resistance before continuing the next segment of pushing and dismantling operation.

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