A full-automatic membrane changing device and method compatible with single-body filter membrane and puncture membrane sheet

Abstract

The application discloses a kind of compatible monomer filter membrane and puncture membrane piece full-automatic membrane changer and method, filter membrane holder is installed on filtration station, monomer filter membrane automatic taking and sending mechanism includes the push rod type membrane piece separation device for pushing the single filter membrane in the lowermost part of the single filter membrane containing box to the membrane taking position and the moving device for moving the single filter membrane on the membrane taking position to the filter membrane holder, puncture membrane piece automatic feeding mechanism adopts reel-reel structure, unused puncture membrane piece is installed on puncture membrane piece supply disc, and the fresh membrane piece on puncture membrane piece supply disc is moved to the filter membrane holder on filtration station by winding shaft, and the lower part of filtration station is provided with membrane piece puncture and positioning needle, the device and method can be compatible with two consumables of monomer filter membrane and puncture membrane piece, membrane changing speed is fast and has self-checking function.

Description

Technical Field

[0001] This invention belongs to the field of automatic control technology and relates to a fully automatic membrane replacement device and method compatible with both single-cell filter membranes and puncture membrane sheets. Background Technology

[0002] The core consumable for SDI (Soil Density Index) testing is a microporous filter membrane with a pore size of 0.45 μm. Traditional SDI testing involves manual membrane replacement, requiring the opening of the filter clamp, removal of the old membrane, placement of the new membrane, and retightening after each test. This process is cumbersome and time-consuming (a single membrane replacement typically takes 5-10 minutes), making continuous online monitoring difficult. In recent years, some automated membrane replacement devices have emerged, but the following prominent problems still exist: 1) Limited membrane types and poor compatibility: Existing automatic membrane changing devices typically only support a single type of membrane consumable. Among these, roll-type puncture membranes (pre-perforated, continuously supplied in rolls) are suitable for high-volume daily testing, offering low consumable costs and fast automatic membrane changing speeds. However, individual filter membranes (circular single pieces, conforming to ASTM / ISO standards) are suitable for comparative calibration, arbitration testing, or high-precision measurements, but existing devices cannot automatically switch to using this type of membrane. Users who wish to use different types of membranes need to disassemble and replace different membrane changing mechanisms, which is inconvenient.

[0003] 2) The membrane replacement mechanism is complex and has low reliability: Some automatic membrane replacement devices use multi-axis robotic arms to grab single filter membranes, which are complex in structure and costly. In addition, they are prone to inaccurate positioning and membrane adhesion in humid environments.

[0004] 3) Long membrane replacement cycle: Even with automatic membrane replacement function, the membrane replacement action from the completion of one measurement to the start of the next measurement still takes a long time (usually >5 minutes), which cannot meet the project goal of rapid membrane replacement within 2 minutes.

[0005] 4) Lack of membrane condition self-check: Existing devices cannot automatically determine whether the filter membrane is correctly installed, damaged, or leaking, resulting in invalid measurement data being generated without being detected.

[0006] Therefore, there is an urgent need for a fully automatic membrane replacement device that is compatible with both single-cell filter membranes and puncture membrane sheets, has a fast membrane replacement speed, and has a self-testing function. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fully automatic membrane replacement device and method that is compatible with both monomeric filter membranes and puncture membranes. This device and method are compatible with both monomeric filter membranes and puncture membranes, have a fast membrane replacement speed, and have a self-testing function.

[0008] To achieve the above objectives, this invention discloses a fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets. The device includes a filtration station, a filter membrane placement and switching platform, an automatic monomeric filter membrane feeding mechanism, an automatic puncture membrane sheet feeding mechanism, and a filter membrane holder. The filter membrane holder is installed on the filtration station. The filter membrane placement and switching platform includes a membrane sheet carrier, on which membrane sheet station A and membrane sheet station B are arranged. Membrane sheet station A is equipped with a monomeric filter membrane box, and membrane sheet rolls are equipped with puncture membrane sheets at membrane station B. The automatic membrane feeding mechanism includes a pusher-type membrane separation device for pushing the single membrane at the bottom of the single membrane box to the membrane picking position, and a moving device for grabbing and moving the single membrane at the membrane picking position to the membrane holder. The automatic puncture membrane feeding mechanism adopts a reel-spindle structure. Unused puncture membranes are installed on the puncture membrane feeding tray. The fresh membranes on the puncture membrane feeding tray are moved to the membrane holder at the filtration station by the take-up shaft. Membrane puncture and positioning pins are provided below the filtration station.

[0009] Furthermore, when the membrane is pressed onto the filter membrane holder, the central hole of the membrane is pierced by the membrane puncture and positioning needle.

[0010] Furthermore, the filter membrane holder includes an upper clamping seat, a lower support seat, and a clamping cylinder for adjusting the distance between the upper clamping seat and the lower support seat.

[0011] Furthermore, a sealing ring is provided on the inner surface of the filter membrane holder.

[0012] Furthermore, it also includes a membrane status self-inspection module, which includes a pressure sensor and a photoelectric sensor: the pressure sensor is installed upstream of the filtration station to detect the sealing pressure after the membrane holder is closed; when the pressure is lower than the threshold, it is determined that the membrane is not installed properly or the sealing ring is aged; the photoelectric sensors are installed on both sides of the filtration station to detect whether the membrane is present or damaged.

[0013] Furthermore, it also includes a controller, which is connected to the filter membrane placement and switching platform, the automatic single filter membrane feeding mechanism, the automatic puncture membrane feeding mechanism, and the filter membrane holder.

[0014] Furthermore, the push rod type membrane separation device includes a micro stepper motor, a lead screw and a push plate. The micro stepper motor drives the lead screw and push plate to push the single filter membrane stacked at the bottom of the single filter membrane box to the membrane taking position.

[0015] Furthermore, when using a single filter membrane, the filter membrane holder directly presses against the individual filter membrane; when using a puncture membrane, the filter membrane holder presses against the strip membrane, while the puncture needle punctures the membrane from below, forming a liquid passage.

[0016] This invention discloses a fully automated membrane replacement method compatible with both monomeric filter membranes and puncture membrane pads, comprising: In the single-cell filter mode, the single filter membrane at the bottom of the single-cell filter membrane box is pushed to the membrane picking position by the push rod type membrane separation device, and the single filter membrane on the membrane picking position is grabbed and moved to the filter membrane holder in the filtration station. In the puncture membrane mode, the fresh membrane on the puncture membrane feed tray is moved to the filter membrane holder on the filtration station by the automatic puncture membrane feeding mechanism, and the membrane puncture and positioning needle moves upward to pass through the membrane.

[0017] Furthermore, in the single-cell filter mode, the sealing performance is detected by a pressure sensor; in the puncture membrane mode, the sealing performance is detected by a pressure sensor.

[0018] The present invention has the following beneficial effects: In specific operation, the fully automatic membrane replacement device and method of the present invention, which is compatible with both single-cell filter membranes and puncture membranes, pushes the single-cell filter membrane at the bottom of the single-cell filter membrane box to the membrane picking position through a push rod-type membrane separation device. The single-cell filter membrane at the picking position is then grasped and moved to the filter membrane holder in the filtration station. The fresh membrane on the puncture membrane feeding tray is moved to the filter membrane holder in the filtration station through an automatic puncture membrane feeding mechanism. The membrane puncture and positioning needles move upward to pass through the membrane, thus making it compatible with both single-cell filter membranes and puncture membranes. It also features fast membrane replacement speed and self-testing function, making it highly practical. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the present invention. Detailed Implementation

[0021] The technical solutions of 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, not all, of the embodiments of the present invention. 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.

[0022] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0025] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0026] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of 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, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] refer to Figure 1 The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets of the present invention includes: 1) Filter membrane placement and switching platform: A rotatable or translatable membrane carrier has several membrane stations: membrane station A is used to accommodate individual filter membrane boxes (which can stack 10 to 30 independent circular filter membranes); membrane station B is used to install puncture membrane rolls (continuous strip membranes with pre-drilled holes).

[0030] 2) The automatic feeding mechanism for single-cell filter membranes includes: Push rod type membrane separation device: includes a micro stepper motor driving a lead screw and push plate to push the single filter membrane stacked at the bottom of the single filter membrane box to the membrane picking position; A vacuum suction cup or electrostatic adsorption head picks up the ejected single filter membrane and transfers it to the filter membrane holder at the filtration station.

[0031] 3) Automatic feeding mechanism for puncture membranes: The system adopts a reel-rewinding structure: unused puncture membrane rolls are installed on the puncture membrane feed tray, and the rewinding shaft is driven by a stepper motor. After each measurement, it automatically rotates a certain angle to deliver fresh membranes to the filtration station. A membrane puncture and positioning needle is installed below the filtration station to puncture the central hole of the membrane when the membrane is pressed onto the filter membrane holder (aligned with the liquid channel of the SDI standard filter membrane holder).

[0032] 4) Membrane holder: It consists of an upper clamping seat, a lower support seat, and a clamping cylinder (or electromagnet); The inner diameter of the filter membrane holder matches the diameter of the filter membrane (usually Φ47mm), and a sealing ring is provided on the inner surface of the filter membrane holder; When using a single filter membrane, the filter membrane holder directly presses against the individual filter membrane; when using a puncture membrane, the filter membrane holder presses against the strip membrane while the puncture needle punctures the membrane from below, forming a liquid passage.

[0033] 5) Diaphragm status self-test module: Including pressure sensors and photoelectric sensors: The pressure sensor is installed upstream of the filtration station to detect the sealing pressure after the filter membrane holder is closed; when the pressure is lower than the threshold, it is determined that the filter membrane is not installed properly or the sealing ring is aging. Photoelectric sensors (through-beam type) are installed on both sides of the filtration station to detect whether the membrane is present or damaged (an alarm will be triggered if the light transmittance is abnormal).

[0034] 6) Controller: It communicates with the main control unit of the SDI detection system, and after receiving the measurement completion signal, it automatically executes the membrane replacement process and feeds back the membrane replacement status (success / failure, membrane type, number of remaining membranes) to the host computer.

[0035] The fully automated film changing method based on the above-mentioned device according to the present invention includes the following steps: Step 1: Select membrane replacement mode; Users select the currently used membrane type (monomer filter mode or puncture membrane mode) via human-machine interface or remote command. If no selection is made, the system automatically detects the membrane installation status (via photoelectric sensor signal) and recommends a mode.

[0036] Step 2: Measurement complete, trigger membrane replacement; Once an SDI measurement is completed (or a membrane change command is issued by the user), the controller performs the following operations: Stop water intake and close the upstream valve; Release the clamping force of the filter membrane holder (cylinder / electromagnet reset); Execute the corresponding membrane replacement subroutine according to the current mode.

[0037] Step 3: Automatic membrane replacement subroutine in single-cell filtration mode; Push rod mechanism operation: The push plate at the bottom of the membrane box pushes the bottommost independent filter membrane to the membrane removal position; The vacuum suction cup descends to adsorb the filter membrane, then rises and moves horizontally to the filtration station; The clamping seat descends, pressing the filter membrane firmly; The vacuum suction cup releases the filter membrane and returns to its original position; The filter membrane holder holds pressure for 0.5 seconds, and the pressure sensor detects the seal. If normal, the membrane replacement is recorded as successful, and the remaining quantity in the membrane box is reduced by 1. If the pressure is insufficient, a reinstallation is automatically performed. If the reinstallation fails, an alarm is triggered.

[0038] Step 4: Automatic membrane changing sub-program in puncture membrane mode; The winding shaft motor rotates, driving the puncture membrane roll forward a certain distance (the distance is equal to the center-to-center distance of the membrane sheets, usually 50~80mm), delivering the unused new membrane sheet area to the filtration station. The clamping seat descends, pressing the strip-shaped diaphragm tightly; The puncture needle is pushed out from below and punctures a central hole in the membrane; The clamp maintains pressure, and the pressure sensor detects the seal; once normal, record that the membrane replacement was successful. If the number of remaining membrane sheets is lower than a preset threshold (e.g., 5 sheets remaining), the system will issue an early warning prompting the user to replace the reel.

[0039] Step 5: Self-test and system reset after membrane replacement; After the membrane replacement is completed, the membrane holder remains closed, and the upstream valve is slowly opened to perform a 0.5-second low-pressure pre-charge and check for leaks (upstream pressure drop rate).

[0040] If there is no leakage, the membrane replacement process ends and the system enters the test state; if there is leakage, the membrane replacement is performed again (limited to 2 retry attempts), otherwise the system will shut down and alarm.

[0041] Furthermore, the single-cell filter mode also supports a quick-change membrane cartridge structure: the membrane cartridge adopts a drawer-type design, which can be pulled out from the side of the device, filled with filter membranes, and pushed in without tools.

[0042] Furthermore, the membrane travel length in the puncture membrane mode can be automatically adjusted according to the preset membrane spacing, making it compatible with membrane rolls of different specifications.

[0043] This invention has the following characteristics: Dual-mode compatibility and flexible application: One device simultaneously supports independent single-cell filter membranes (for standard comparison) and puncture membrane rolls (for daily continuous monitoring). Users can freely switch between them according to accuracy requirements and cost considerations without replacing mechanical parts, which greatly improves the applicability of SDI detection.

[0044] Extremely fast membrane replacement speed: In single-unit filter membrane mode, the single membrane replacement time is ≤90 seconds; in puncture membrane mode, the single membrane replacement time is ≤30 seconds (only rotating the rewind shaft and pressing are required). Overall, it meets the project's goal of "rapid and fully automatic membrane replacement within 2 minutes".

[0045] Intelligent self-testing avoids invalid measurements: It integrates pressure seal detection and photoelectric damage detection, which can automatically identify whether the filter membrane is not placed, offset, damaged or poorly sealed, and will alarm or retry when the membrane replacement fails, thus eliminating erroneous SDI data caused by consumable problems.

[0046] Consumable management: Automatically counts the number of remaining membrane sheets, provides early warnings for replacement, and avoids test interruptions; the quick-change membrane cartridge design simplifies maintenance work for operators.

[0047] Integrated membrane replacement architecture compatible with single-cell filter membranes and puncture membrane sheets: For the first time, two completely different membrane sheet supply methods are integrated in the SDI automatic membrane replacement device, and seamless switching is achieved through a shared gripper and independent control subroutine, filling a gap in the industry.

[0048] Push-plate type automatic separation and vacuum adsorption delivery technology for single filter membranes: To address the problem of easy adhesion of stacked membrane sheets, a combination of push plate separation and vacuum adsorption is adopted to achieve reliable single membrane delivery and avoid adhesion of double or multiple membrane sheets.

[0049] The puncture membrane step feed has a one-time puncture structure: the membrane position is precisely positioned by the winding shaft, and the center hole is automatically punctured during the pressing process, which simplifies the use of the puncture membrane and eliminates the need for pre-drilling.

[0050] Self-inspection method for sealing and membrane integrity after membrane replacement: Through pressure attenuation test and photoelectric transmission detection, the correct installation of the membrane is guaranteed by two methods. This is the first membrane replacement quality verification mechanism in the industry.

[0051] Example 1 Application Scenario: In a power plant's chemical water treatment workshop, the SDI monitoring instrument needs to operate continuously for 24 hours, measuring the SDI value every 15 minutes. Manual membrane replacement is not feasible. Using the device of this invention, daily use involves puncturing membrane rolls (each roll can be used continuously 200 times), with the rolls replaced every two weeks; a standard comparison calibration is performed monthly, switching to single-cell filter membrane mode.

[0052] Step 1: Configure routine puncture membrane mode; The operator selects "Piercing Diaphragm Mode" on the touchscreen and enters the current number of diaphragms on the reel (200). The controller records the remaining quantity.

[0053] Step 2: Automatic cyclic measurement and membrane replacement; After each measurement is completed, the controller automatically executes the following process (takes approximately 25 seconds): 1) Close the inlet valve and release the clamp; 2) The take-up shaft motor rotates 65mm to deliver the new membrane sheet area to the filtration station; 3) Clamp the device and puncture the hole with the puncture needle; 4) The pressure sensor checks the sealing. Once it is normal, the inlet valve is opened to start the next measurement.

[0054] After 72 hours of continuous operation, the membrane replacement success rate reached 99.5%, and there was never a test interruption due to membrane jamming.

[0055] Step 3: Monthly calibration of individual filter membrane mode switching; The staff selected the "single-unit filter membrane mode," opened the membrane cartridge cover on the side of the device, and pushed in the standard individual filter membranes (30 membranes per cartridge). The system automatically detected that the membrane cartridges were installed correctly.

[0056] During calibration, the device follows a single-membrane filter replacement subroutine: the push rod ejects the single filter membrane, the vacuum suction cup moves it to the filtration station, and it is pressed and sealed to complete the calibration measurement. After calibration, the device can be switched back to the puncture membrane mode with a single button to continue daily monitoring.

[0057] Step 4: Fault Detection Case; During a membrane replacement, the pressure sensor detected insufficient pressure in the clamp (due to aging and leakage of the sealing ring). The controller determined this to be a "sealing abnormality" and automatically performed a reinstallation (re-adsorbing and tightening the filter membrane). After the reinstallation, the pressure returned to normal, avoiding invalid measurements. At the same time, the system issued a "sealing ring life warning" to remind maintenance personnel to check.

[0058] Performance Analysis: Compared to commercially available automated SDI instruments that only support membrane puncture (such as a certain imported brand), this device offers additional compatibility with individual filter membranes and a faster membrane replacement speed (approximately 70 seconds for imported products, compared to 30 seconds for this device in puncture mode). Compared to individual filter membrane analyzers that only support manual membrane replacement, this device significantly reduces the amount of manual maintenance required.

[0059] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0060] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0061] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets, characterized in that, The system includes a filtration station, a membrane placement and switching platform, an automatic single-cell membrane feeding mechanism, an automatic puncture membrane feeding mechanism, and a membrane holder. The membrane holder is installed on the filtration station. The membrane placement and switching platform includes a membrane carrier with membrane station A and membrane station B. Membrane station A has a single-cell membrane box, and membrane station B has a puncture membrane roll. The automatic single-cell membrane feeding mechanism includes a push-rod type membrane separation device for pushing the single-cell membrane at the bottom of the single-cell membrane box to the membrane picking position, and a moving device for grabbing and moving the single-cell membrane at the picking position to the membrane holder. The automatic puncture membrane feeding mechanism uses a reel-spool structure. Unused puncture membranes are installed on a puncture membrane feed tray. A take-up spool moves fresh membranes from the puncture membrane feed tray to the membrane holder on the filtration station. Membrane puncture and positioning pins are located below the filtration station.

2. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, When the membrane is pressed onto the filter membrane holder, the central hole of the membrane is pierced by the membrane puncture and positioning needle.

3. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, The filter membrane holder includes an upper clamping seat, a lower support seat, and a clamping cylinder for adjusting the distance between the upper clamping seat and the lower support seat.

4. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, The inner surface of the filter membrane holder is equipped with a sealing ring.

5. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, It also includes a membrane status self-test module, which includes a pressure sensor and a photoelectric sensor: the pressure sensor is installed upstream of the filtration station to detect the sealing pressure after the membrane holder is closed; when the pressure is lower than the threshold, it is determined that the membrane is not installed properly or the sealing ring is aged; the photoelectric sensors are installed on both sides of the filtration station to detect whether the membrane is present or damaged.

6. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, It also includes a controller, which is connected to the filter membrane placement and switching platform, the automatic single filter membrane feeding mechanism, the automatic puncture membrane feeding mechanism, and the filter membrane holder.

7. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, The push rod type membrane separation device includes a micro stepper motor, a lead screw and a push plate. The micro stepper motor drives the lead screw and push plate to push the single filter membrane stacked at the bottom of the single filter membrane box to the membrane removal position.

8. The fully automatic membrane changing device compatible with both monomeric filter membranes and puncture membrane sheets according to claim 1, characterized in that, When using a single filter membrane, the filter membrane holder directly presses against the individual filter membrane; when using a puncture membrane, the filter membrane holder presses against the strip membrane while the puncture needle punctures the membrane from below, forming a liquid passage.

9. A fully automated membrane replacement method compatible with both monomeric filter membranes and puncture membrane sheets, characterized in that, include: In the single-cell filter mode, the single filter membrane at the bottom of the single-cell filter membrane box is pushed to the membrane picking position by the push rod type membrane separation device, and the single filter membrane on the membrane picking position is grabbed and moved to the filter membrane holder in the filtration station. In the puncture membrane mode, the fresh membrane on the puncture membrane feed tray is moved to the filter membrane holder on the filtration station by the automatic puncture membrane feeding mechanism, and the membrane puncture and positioning needle moves upward to pass through the membrane.

10. The fully automated membrane replacement method compatible with monomeric filter membranes and puncture membrane sheets according to claim 9, characterized in that, In single-cell filter mode, the sealing performance is detected by a pressure sensor; in puncture membrane mode, the sealing performance is detected by a pressure sensor.

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