Filtering speed detection device for novel material nanofiltration membrane

Abstract

The invention discloses a filtering speed detection device of a new material nanofiltration membrane, and relates to the technical field of filtering speed detection.The filtering speed detection device comprises a machine shell and a membrane containing assembly, the membrane containing assembly is arranged on one side of the machine shell and comprises a measuring cylinder, the measuring cylinder is connected to one side of the machine shell, and fixing pins are symmetrically connected to the periphery of the lower side of the measuring cylinder; a sliding groove is formed in the fixing pin, an inserting groove is formed in one side of the sliding groove, a sliding rod is slidably connected into the sliding groove, and a funnel base is connected to the lower end of the sliding rod. According to the device, the nanofiltration membrane can be flexibly clamped and positioned, it is avoided that when the nanofiltration membrane is placed or clamped, the nanofiltration membrane is folded and compressed, and consequently a detection result is not accurate, when the nanofiltration membrane is fixed, the measuring cylinder and the funnel base can be synchronously fixed and sealed, it is avoided that the funnel base is loosened or disengaged in the detection process, and after detection is finished, the detection result is not accurate. The liquid in the suction flask can be automatically guided out, and all operations can be completed only through one step, so that the detection time is shortened, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new filter material detection, in particular to a filter speed detection device for new material nanofiltration membrane. BACKGROUND

[0002] Nanofiltration membrane is a fine separation membrane with a pore size of about 1 nanometer. In recent years, the application of new materials has significantly improved its performance. These new nanofiltration membranes have breakthroughs in separation efficiency, stability, tolerance and application range, and are the research focus in the field of material science and membrane technology. In the production and use of nanofiltration membranes, the filter speed of the nanofiltration membrane often needs to be detected to ensure that the membrane flux meets the standard.

[0003] When using the filter speed detection device to detect the nanofiltration membrane, the cut nanofiltration membrane is usually placed in the filter membrane holder or funnel base, and then fixed before detection. However, when placing and fixing the filter membrane, the nanofiltration membrane may be offset or clamped too tightly, causing the nanofiltration membrane to be compressed and folded in the filter membrane holder or funnel base, resulting in deformation of the membrane hole structure and distortion of the test data, which cannot truly reflect the performance of the membrane itself. SUMMARY

[0004] The purpose of the present application is to provide a filter speed detection device for new material nanofiltration membrane to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A filter speed detection device for new material nanofiltration membrane, comprising a housing and a membrane placement assembly, the housing is provided with a membrane placement assembly on one side, the membrane placement assembly comprises a measuring cylinder, the housing is connected with the measuring cylinder on one side, and the lower side of the measuring cylinder is symmetrically connected with a fixing pin, a sliding groove is formed in the fixing pin, and a slot is formed in one side of the sliding groove, a sliding rod is slidably connected in the sliding groove, and a funnel seat is connected to the lower end of the sliding rod, a positioning pin is connected to the center of the funnel seat, and an enclosing groove is formed in the inner side of the funnel seat, a plurality of top grooves are symmetrically formed around the enclosing groove, and a top block is slidably connected in the top groove, a fixing groove is formed in the lower end of the sliding rod, and a fixing block is slidably connected in the fixing groove, the lower end of the measuring cylinder is connected with an inflatable air bag, an annular groove is formed in the inner side of the measuring cylinder, and an annular plate is slidably connected in the annular groove.

[0006] Further, the fixing pins are equally circumferentially distributed on the measuring cylinder, the top block is a parallelogram, and the lower end of the top block is located in the enclosing groove, and the fixing block is slidably connected with the sliding rod through the slot.

[0007] Further, the inner wall of the housing is symmetrically provided with guide rails on the front and rear sides, and the guide rails are slidably connected with sliding blocks, the sliding blocks are connected with a pad plate, the pad plate is centrally provided with a filter bottle, and the filter bottle is connected with the funnel seat.

[0008] Further, the bottom of the filter bottle is provided with a water leakage hole, and a blocking spring is connected in the water leakage hole, one end of the blocking spring is connected with a sealing plate, and the sealing plate is elastically connected with the filter bottle through the blocking spring, and the sealing plate is clamped and connected with the filter bottle through the water leakage hole.

[0009] Further, the water collecting plate is connected with a top column in the middle, and the water collecting plate is provided with a rotating wheel on one side of the pad.

[0010] Further, the rotating wheel is connected with a crank handle on one side through a shaft rod, and the machine shell is provided with a stop block on both sides of the crank handle, and the stop block is clamped and connected with the crank handle.

[0011] Further, one side of the machine shell is connected with a temporary storage pool, and an air pump is arranged above the temporary storage pool, a water inlet is formed in one side of the temporary storage pool, and the water collecting plate is communicated with the temporary storage pool through the water inlet, and the air pump is communicated with the filter bottle through a hose.

[0012] Further, support springs are connected symmetrically on the lower side of the machine shell, and one end of the support spring is connected with a moving plate, the moving plate is connected with connecting rods symmetrically on both sides, and the other end of the connecting rod is connected with a pressing ring, the pressing ring is located on the outer side of the measuring cylinder, and the fixing pin is located on the inner side of the pressing ring.

[0013] Further, a clamping groove is formed in the middle of the moving plate, and clamping rails are formed on both sides of the clamping groove, clamping blocks are clamped and connected in the clamping rails, and pressing plates are connected between the clamping blocks, one side of the pressing plate is connected with a return spring, and the pressing plate is elastically connected with the moving plate through the return spring, and inclined surfaces are arranged on both sides of the pressing plate.

[0014] Further, a pressing block is clamped and connected in the insertion slot, and push-out springs are connected symmetrically on both sides of the pressing block, the pressing block is slidably connected with the fixing pin through the insertion slot, and the pressing block is elastically connected with the fixing pin through the push-out spring.

[0015] The new material nanofiltration membrane filter speed detection device provided by the application has the following beneficial effects: 1. The nanofiltration membrane can be positioned when placed, so that folding caused by inclination of the placement position is avoided, and when connected to the device, the nanofiltration membrane can be fixed flexibly by the air bag, so that compression caused by excessive fixing force is avoided, deformation of the membrane hole structure is avoided, and test data distortion is avoided.

[0016] 2、The application is used, only need to move the crank, can drive the runner rotation, through the pad plate to the filter bottle jacking, thereby completing the interface of funnel seat and cylinder, and in the interface is completed, reverse rotation runner, can first remove the cylinder and funnel seat between the fixed, then the filter bottle down, without other operation, only need to rotate the runner can complete the interface and restore, simplified operation steps, reduce the detection time, improve the detection efficiency.

[0017] 3、The application is used, only need to move the crank, can drive the runner rotation, through the pad plate to the filter bottle jacking, thereby completing the interface of funnel seat and cylinder, and in the interface is completed, reverse rotation runner, can first remove the cylinder and funnel seat between the fixed, then the filter bottle down, without other operation, only need to rotate the runner can complete the interface and restore, simplified operation steps, reduce the detection time, improve the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The whole half cutaway perspective structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided. Figure 2 The membrane assembly cutaway perspective exploded structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided. Figure 3 The filter bottle cutaway perspective exploded structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided. Figure 4 The pressure ring cutaway perspective structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided. Figure 5 The whole front perspective structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided. Figure 6 The whole rear perspective structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided. Figure 7 The machine shell cutaway perspective structural schematic view of the filter speed detection device for new material nanofiltration membrane provided by the application is provided.

[0019] In the diagram: 1. Housing; 2. Membrane assembly; 201. Measuring cylinder; 202. Fixing pin; 203. Slide groove; 204. Slot; 205. Slide rod; 206. Funnel seat; 207. Positioning pin; 208. Sealing groove; 209. Top groove; 210. Top block; 211. Fixing groove; 212. Fixing block; 213. Expansion air bladder; 214. Annular groove; 215. Annular plate; 3. Guide rail; 4. Slider; 5. Pad; 6. Filter bottle; 7. Drain hole; 8. Sealing spring; 9. Sealing plate; 10. Water receiving plate; 11. Top column; 12. Rotary wheel; 13. Top rod; 14. Handle; 15. Stop block; 16. Temporary storage tank; 17. Air pump; 18. Water inlet; 19. Support spring; 20. Moving plate; 21. Connecting rod; 22. Pressure ring; 23. Slot; 24. Rail; 25. Block; 26. Pressure plate; 27. Return spring; 28. Pressure block; 29. ​​Push-out spring. Detailed Implementation

[0020] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0024] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0026] Please see Figures 1 to 7 The filtration rate detection device for the novel nanofiltration membrane provided by the present invention includes a housing 1 and a membrane placement assembly 2, wherein the membrane placement assembly 2 is provided on one side of the housing 1. The membrane assembly 2 includes a measuring cylinder 201. The measuring cylinder 201 is connected to one side of the housing 1, and fixing pins 202 are symmetrically connected around the lower side of the measuring cylinder 201. A sliding groove 203 is provided in the fixing pin 202, and a slot 204 is provided on one side of the sliding groove 203. A sliding rod 205 is slidably connected in the sliding groove 203, and a funnel seat 206 is connected to the lower end of the sliding rod 205. A positioning pin 207 is connected to the center of the funnel seat 206, and a sealing groove 208 is provided inside the funnel seat 206. A top groove 209 is symmetrically provided around the sealing groove 208, and a top block 210 is slidably connected in the top groove 209. A fixing groove 211 is provided at the lower end of the sliding rod 205, and a fixing block 212 is slidably connected in the fixing groove 211. An expansion air bladder 213 is connected to the lower end of the measuring cylinder 201, and an annular groove 214 is provided inside the measuring cylinder 201. An annular plate 215 is slidably connected in the annular groove 214.

[0027] Please see Figures 1 to 3There are four fixed pins 202 evenly distributed on the measuring cylinder 201. The positioning pin 207 is conical. The top block 210 is parallelogram and the lower end of the top block 210 is located in the sealing groove 208. The fixed block 212 is engaged and slidably connected to the slide rod 205 through the slot 204. The inner wall of the machine housing 1 is symmetrically provided with guide rails 3 on the front and rear sides. The guide rails 3 are engaged and slidably connected with sliders 4. The sliders 4 are connected with pads 5. The center of the pads 5 is provided with a filter bottle 6. The filter bottle 6 is connected to the funnel seat 206. When in use, the nanofiltration membrane can be positioned to prevent it from folding during fixing due to misalignment. When docking the device, it can be flexibly fixed by an airbag to prevent excessive fixing force from compressing it, causing deformation of the membrane pore structure, and thus distorting the test data. When fixing the nanofiltration membrane, the directional expansion of the airbag can seal the connection and assist in fixing the connection, avoiding inaccurate test results caused by air leakage or loose connection.

[0028] Please see Figures 1 to 7 The bottom of the filtration bottle 6 is provided with a water leakage hole 7, and a sealing spring 8 is connected inside the water leakage hole 7. One end of the sealing spring 8 is connected to a sealing plate 9, and the sealing plate 9 is elastically connected to the filtration bottle 6 through the sealing spring 8. The sealing plate 9 is engaged with the filtration bottle 6 through the water leakage hole 7. The housing 1 is connected to a water receiving plate 10 below the pad 5, and a top column 11 is connected to the middle of the water receiving plate 10. A rotating wheel 12 is provided on one side of the pad plate 5 of the housing 1, and a top rod 13 is connected to the edge of the rotating wheel 12. A crank handle 14 is connected to one side of the rotating wheel 12 via a shaft. A stop block 15 is provided on both sides of the crank handle 14 in the housing 1, and the stop block 15 is engaged with the crank handle 14. A temporary storage tank 16 is connected to one side of the housing 1, and an air pump 17 is provided above the temporary storage tank 16. A water inlet 18 is opened on one side of the temporary storage tank 16, and a water receiving plate 10 is connected to the temporary storage tank 16 through the water inlet 18. The air pump 17 is connected to the filtration bottle 6 through a hose. Support springs 19 are symmetrically connected to the lower side of the housing 1, and a moving plate 20 is connected to one end of the support spring 19. Connecting rods 21 are symmetrically connected to both sides of the moving plate 20, and the other end of the connecting rods 21 is connected to There is a pressure ring 22, which is located outside the measuring cylinder 201, and the fixing pin 202 is located inside the pressure ring 22. The moving plate 20 has a slot 23 in the middle, and the slot 23 has a rail 24 on both sides. The rail 24 has a locking block 25, and the locking blocks 25 are connected to a pressure plate 26. The pressure plate 26 has a return spring 27 connected to one side, and the pressure plate 26 is elastically connected to the moving plate 20 through the return spring 27. The pressure plate 26 has inclined surfaces on both the upper and lower sides. The slot 204 has a locking block 28, and the pressure block 28 has push-out springs 29 symmetrically connected to both sides. The pressure block 28 is slidably connected to the fixing pin 202 through the slot 204, and the pressure block 28 is elastically connected to the fixing pin 202 through the push-out spring 29.

[0029] In use, simply turn the crank handle 14 to drive the rotating wheel 12 to rotate, and lift the filtration bottle 6 through the pad plate 5, thereby completing the docking of the funnel seat 206 and the measuring cylinder 201. After docking is completed, rotating the wheel 12 in the opposite direction can release the fixing between the measuring cylinder 201 and the funnel seat 206. Then, the filtration flask 6 can be lowered. No other operation is required. The docking and restoration can be completed simply by rotating the wheel 12, which simplifies the operation steps and improves the detection efficiency.

[0030] During filtration rate testing, the negative pressure exerted by the vacuum pump 17 on the sealing plate 9 within the filtration bottle 6 is less than the elastic force exerted by the sealing spring 8 on the sealing plate 9. This causes the sealing plate 9 to seal the leakage hole 7 under the action of the sealing spring 8 during filtration, preventing gas or liquid leakage. When the pad 5 drives the filtration bottle 6 to reset, the top column 11 can lift the sealing plate 9 from the leakage hole 7, allowing the liquid in the filtration bottle 6 to pass through the leakage hole 7 and flow along the water receiving plate 10 into the temporary storage tank 16, awaiting subsequent centralized processing.

[0031] In summary, when using the filtration rate detection device of the new material nanofiltration membrane, first open the tilting door on the side of the housing 1, and put the nanofiltration membrane with the positioning hole in the middle into the funnel seat 206. When placing the nanofiltration membrane, the positioning pin 207 can automatically position and correct the nanofiltration membrane through the positioning hole to prevent the position of the nanofiltration membrane from shifting. After the nanofiltration membrane is placed, close the rotating door and turn the crank handle 14 on the housing 1 to rotate the wheel 12 90° inside the housing 1. The wheel 12 can then lift the filtration bottle 6 through the pad 5, so that the filtration bottle 6 drives the funnel seat 206 to dock with the measuring cylinder 201. During the docking process, the fixing pin 202 can restrict the funnel seat 206 through the slide groove 203 and the slide rod 205 to prevent it from tilting. During the movement of the pad 5, the guide rail 3 can restrict the pad 5 and the filtration bottle 6 through the slider 4 to prevent the pad 5 and the filtration bottle 6 from tilting during the lifting process, which would prevent them from docking accurately. During the lifting process of the filtration bottle 6, the sealing plate 9 will rebound under the action of the sealing spring 8 and embed into the water leakage hole 7 to seal the water leakage hole 7 and prevent gas or liquid leakage during the test. When the funnel seat 206 is connected to the measuring cylinder 201, as the measuring cylinder 201 is embedded in the funnel seat 206, the expansion bladder 213 is compressed and deformed under the pressure of the funnel seat 206 and expands. The ring plate 215 is forced to slide in the ring groove 214 and restrict the expansion bladder 213, so that it can only expand outward. This allows the expansion bladder 213 to fix the nanofiltration membrane while smoothing and tightening the edges of the nanofiltration membrane, preventing the nanofiltration membrane from folding and compressing under pressure, which would cause deformation of the nanofiltration membrane pore structure and thus distort the test data. Moreover, when fixing the nanofiltration membrane, the flexible structure of the expansion bladder 213 can achieve the fixing effect while avoiding excessive force on the nanofiltration membrane, which would cause deformation of its pore structure. As the expansion bladder 213 expands, it enters the sealing groove 208, providing the inclined surface of the top block 210 to push it upward in the top groove 209 and into the fixing groove 211. The top block 210, through the inclined surface, drives the fixing block 212 to move in the fixing groove 211 and into the slot 204. The fixing block 212 engages with the fixing pin 202 through the slot 204, thereby fixing the funnel seat 206 to the base of the measuring cylinder 201 through the fixing pin 202. This completes the docking of the measuring cylinder 201 and the funnel seat 206. It can prevent the connection between the measuring cylinder 201 and the funnel seat 206 from loosening due to external vibrations or the device itself during the testing process, which would cause liquid leakage and inaccurate test results. After the expansion bladder 213 enters and fills the sealing groove 208, it can seal the connection between the measuring cylinder 201 and the funnel seat 206, avoiding inaccurate test results due to insufficient sealing during testing. During the rotation of the wheel 12, when the push rod 13 contacts the pressure plate 26, the moving plate 20 is blocked by the water receiving plate 10 and cannot rise. The push rod 13 can then press the pressure plate 26 to slide in the slot 23 and compress the return spring 27 through its own inclined surface and the pressure plate 26, so that the pressure plate 26 will not obstruct the rotation of the wheel 12. The locking block 25 can restrict the pressure plate 26 through the locking rail 24 to prevent the pressure plate 26 from tilting during the movement. After the measuring cylinder 201 is connected to the funnel seat 206, the filtrate is poured into the measuring cylinder 201 and the vacuum pump 17 is started to perform vacuum filtration. The filtration rate of the nanofiltration membrane can be obtained from the time it takes for the filtrate in the measuring cylinder 201 to be completely filtered out. During the vacuum filtration process, the negative pressure formed by the vacuum pump 17 in the vacuum filtration bottle 6 and the force applied to the sealing plate 9 is less than the elastic force applied to the sealing plate 9 by the sealing spring 8. Therefore, the sealing plate 9 can always keep the leakage hole 7 closed. After the test is completed, turn off the vacuum pump 17, and reverse the crank handle 14 to drive the rotor 12 to reverse and reset. This allows the filtration bottle 6 to reset the pad 5 under its own weight. When the rotor 12 resets, the pressure rod will first contact the pressure plate 26, causing the pressure plate 26 to move the moving plate 20 down through the locking block 25 and the locking rail 24, compressing the support spring 19. When the moving plate 20 descends, it can drive the pressure ring 22 to descend synchronously through the connecting rod 21, and the connecting rod 21 can restrict the moving plate 20 and the moving plate 20 through the pad 5. To prevent it from tilting during movement, when the pressure ring 22 descends, it can press the pressure block 28 to move within the slot 204 and compress the ejection spring 29, pushing the fixing block 212 out of the slot 204 and causing the top block 210 to descend, thereby releasing the fixation between the funnel seat 206 and the measuring cylinder 201. Because the flexible structure of the expansion air bladder 213 ensures that the expansion air bladder 213 will not obstruct the movement of the top block 210, and during this process, the arc surface of the rotating wheel 12 is always in contact with the pad 5, providing it with support. When the pressure plate 26 drives the moving plate 20 to descend to a certain height, because the pressure plate 26 moves downward in a straight line, while the pressure rod moves in an arc with the rotating wheel 12, the pressure rod will contact the inclined surface on the upper side of the pressure plate 26 and press the pressure plate 26 to slide in the slot 23. At this time, the pressure rod can no longer apply downward pressure to the moving plate 20 through the pressure plate 26. The moving plate 20 can then drive the pressure ring 22 to reset under the action of the support spring 19. At the same time, the pad 5 no longer contacts the arc surface of the rotating wheel 12, and can descend stably with the rotation of the rotating wheel 12. When the top column 11 passes through the pad 5 and enters the drain hole 7 and comes into contact with the sealing plate 9, the sealing plate 9 can be lifted out of the drain hole 7 and the sealing spring 8 can be stretched, so that the filtrate in the filtration bottle 6 can leave from the drain hole 7, pass through the pad 5 and enter the temporary storage tank 16 from the inlet 18 along the water receiving plate 10, waiting for centralized processing.

[0032] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A filtration rate detection device for a novel nanofiltration membrane, characterized in that, The device includes a housing and a film placement assembly. The film placement assembly is located on one side of the housing and includes a measuring cylinder. The measuring cylinder is connected to one side of the housing, and fixing pins are symmetrically connected around the lower side of the measuring cylinder. A sliding groove is formed in the fixing pin, and a slot is formed on one side of the sliding groove. A sliding rod is slidably connected in the sliding groove, and a funnel seat is connected to the lower end of the sliding rod. A positioning pin is connected to the center of the funnel seat, and a sealing groove is formed inside the funnel seat. Top grooves are symmetrically formed around the sealing groove, and a top block is slidably connected in the top groove. A fixing groove is formed at the lower end of the sliding rod, and a fixing block is slidably connected in the fixing groove. An expansion air bladder is connected to the lower end of the measuring cylinder, and an annular groove is formed inside the measuring cylinder. An annular plate is slidably connected in the annular groove.

2. The filtration rate detection device for a novel nanofiltration membrane according to claim 1, characterized in that, The fixing pins are distributed equidistantly on the measuring cylinder in several circular patterns. The top block is a parallelogram, and the lower end of the top block is located in the sealing groove. The fixing block is slidably connected to the slide rod through a slot.

3. The filtration rate detection device for a novel nanofiltration membrane according to claim 2, characterized in that, The inner wall of the casing is symmetrically provided with guide rails on the front and rear sides, and sliders are slidably connected in the guide rails. A pad is connected between the sliders, and a filtration bottle is provided in the center of the pad. The filtration bottle is connected to the funnel seat.

4. The filtration rate detection device for a novel nanofiltration membrane according to claim 3, characterized in that, The bottom of the filtration bottle is provided with a water leakage hole, and a sealing spring is connected inside the water leakage hole. One end of the sealing spring is connected to a sealing plate, and the sealing plate is elastically connected to the filtration bottle through the sealing spring. The sealing plate is engaged with the filtration bottle through the water leakage hole.

5. The filtration rate detection device for a novel nanofiltration membrane according to claim 4, characterized in that, The housing has a water receiving plate connected below the pad, and a top column connected to the middle of the water receiving plate. The housing has a rotating wheel on one side of the pad, and a top rod connected to the edge of the rotating wheel.

6. The filtration rate detection device for a novel nanofiltration membrane according to claim 5, characterized in that, A crank handle is connected to one side of the rotary wheel via a shaft, and the housing has stops on both sides of the crank handle, which are engaged with the crank handle.

7. The filtration rate detection device for a novel nanofiltration membrane according to claim 6, characterized in that, A temporary storage tank is connected to one side of the casing, and an air pump is installed above the temporary storage tank. A water inlet is opened on one side of the temporary storage tank, and a water receiving plate is connected to the temporary storage tank through the water inlet. The air pump is connected to the filtration bottle through a hose.

8. The filtration rate detection device for a novel nanofiltration membrane according to claim 7, characterized in that, The lower side of the inner casing is symmetrically connected with support springs, and one end of the support spring is connected to a moving plate. The two sides of the moving plate are symmetrically connected with connecting rods, and the other end of the connecting rod is connected to a pressure ring. The pressure ring is located outside the measuring cylinder, and the fixing pin is located inside the pressure ring.

9. The filtration rate detection device for a novel nanofiltration membrane according to claim 8, characterized in that, The moving plate has a slot in the middle and a rail on both sides of the slot. A block is engaged in the rail and a pressure plate is connected between the blocks. A return spring is connected to one side of the pressure plate and the pressure plate is elastically connected to the moving plate through the return spring. The pressure plate has inclined surfaces on both the upper and lower sides.

10. The filtration rate detection device for a novel nanofiltration membrane according to claim 9, characterized in that, A pressure block is engaged within the slot, and push-out springs are symmetrically connected to both sides of the pressure block. The pressure block is slidably connected to the fixing pin via the slot, and the pressure block is elastically connected to the fixing pin via the push-out springs.

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