Filtering membrane bag switching structure and filtering device

Abstract

The utility model relates to the technical field of filtration, in particular to a filter membrane package switching structure and a filter device, the filter membrane package switching structure comprises: a flexible rubber coating plate suitable for being attached to a top plate of a clamp or a bottom structure of the clamp in a sealing manner; the rigid supporting plate is arranged between the flexible rubber coating plate and the filtering membrane bag, and the rigid supporting plate and the flexible rubber coating plate are arranged in an attached and sealed mode; according to the technical scheme, the characteristic that the flexible rubber coating plate is deformable is utilized, it is guaranteed that the filtering membrane package switching structure and the clamp are connected in a sealed mode under the pressure effect, and the risk of leakage does not exist; meanwhile, uniform stress is guaranteed through the rigid supporting plate, and the sealing effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a filter membrane package transfer structure and a filter device. Background Art

[0002] Membrane filtration technology is a highly efficient separation method widely used in a variety of technical fields, including biopharmaceuticals, food processing, and water treatment. Based on the direction of material flow, membrane filtration technology can be divided into dead-end filtration and tangential flow filtration. In dead-end filtration, the material flow direction is the same as the filtration direction. After a period of filtration, the filtered material accumulates on the surface of the filter membrane, gradually forming a filter cake layer or gel layer, resulting in a significant decrease in filtration efficiency and seriously shortening the service life of the filter membrane. In tangential flow filtration, the material flow direction is perpendicular to the filtration direction, and the material continuously flushes the filter membrane surface, flushing the filter membrane and extending the service life of the filter membrane.

[0003] A common form of tangential flow filtration, membrane filtration packages typically consist of multiple filter units, each stacked with multiple layers of membrane. Adjacent membranes are positioned opposite each other, forming inlet and outlet surfaces. The gap between the inlet surfaces forms the inlet flow path, while the space between the outlet surfaces forms the outlet flow path.

[0004] In the patent with publication number US5096582A, a tangential flow filtration device is disclosed, comprising: a filter membrane package; Figure 1 , in the filter membrane package (in Figure 1 A top plate 1 is fitted above the filter membrane package (not drawn in the figure), and a bottom structure 2 is fitted below the filter membrane package. A liquid inlet manifold 3, a liquid outlet manifold 4 and a reflux manifold 5 are provided on the bottom structure 2. The liquid inlet manifold 3 is used to input the liquid to be filtered, and the liquid outlet manifold 4 is used to output the filtered liquid; the reflux manifold 5 is used to output the filtered impurities. The top plate 1 and the bottom structure 2 act as a clamp to clamp the filter membrane package in the middle. The top plate 1 and the bottom structure 2 serve as seals for the top and bottom surfaces of the filter membrane package, respectively. Generally, the top and bottom surfaces of the filter membrane package are both hard cover plates. When the cover plate is in direct contact with the top plate 1 or the bottom structure 2, it is difficult to ensure sealing, which can easily lead to filtrate leakage and seriously affect the filtering effect. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that when the hard cover plate on the filter membrane package is in direct contact and sealed with the clamp, it is difficult to ensure the sealing, which can easily lead to filtrate leakage and seriously affect the filtering effect.

[0006] In order to overcome the above-mentioned defects, the present invention provides a filter membrane package transfer structure suitable for sealing and connecting a clamp and a filter membrane package. The filter membrane package transfer structure includes:

[0007] A flexible rubber-coated plate adapted to be fitted and sealed with the top plate or bottom structure of the fixture;

[0008] The rigid support plate is arranged between the flexible rubber-coated plate and the filter membrane package, and is sealed to the flexible rubber-coated plate.

[0009] Optionally, a plurality of first holes and a second hole are provided at intervals near two opposite edges of the flexible rubber-coated board, and the size of the first hole is larger than that of the second hole; sealing rings are provided on the peripheries of the first holes and the second holes on the side of the flexible rubber-coated board facing the rigid support plate; a third hole and a fourth hole are provided at positions corresponding to the first holes and the second holes on the rigid support plate, respectively; the sealing ring on the periphery of the first hole is suitable for fitting and nesting in the third hole, and the sealing ring on the periphery of the second hole is suitable for fitting and nesting in the fourth hole.

[0010] Optionally, it also includes:

[0011] A protective plate is arranged between the rigid support plate and the filter membrane package; a fifth hole and a sixth hole are respectively provided on the protective plate at positions corresponding to the first hole and the second hole; the sealing ring around the first hole is suitable for fitting and nesting in the fifth hole, and the sealing ring around the second hole is suitable for fitting and nesting in the sixth hole.

[0012] Optionally, the height of the sealing ring protruding from the protective plate ranges from 0.05 mm to 0.5 mm.

[0013] Optionally, a convex edge is provided on the outer periphery of the flexible rubber-coated board, and the convex edge is suitable for fitting and nesting with the rigid support board and / or the protection board.

[0014] Optionally, the sealing ring and / or the flange are integrally formed with the flexible rubber-coated board.

[0015] Optionally, the sealing ring and / or the flange are fixedly connected to the protection plate.

[0016] Optionally, the size of the protection plate is larger than that of the rigid support plate, and a gap is provided between the outer edge of the protection plate and the outer edge of the rigid support plate;

[0017] And / or, the size of the fifth hole is smaller than that of the third hole, and the size of the sixth hole is smaller than that of the fourth hole.

[0018] Optionally, the cross-sectional shape of the convex edge and / or the sealing ring is step-shaped.

[0019] Optionally, the thickness of the rigid support plate is in the range of 0.5 mm to 1.5 mm, and the elastic modulus of the rigid support plate is not less than 70 GPa;

[0020] And / or, the rigid support plate is made of any one of aluminum, iron, copper or stainless steel;

[0021] And / or, the flexible rubber-coated board is made of any one of PE, PA, rubber, PMMA, epoxy resin or PP.

[0022] Optionally, the protective plate is made of any one of PP, PE, PVDF, PES or PET.

[0023] The utility model also provides a filtering device, comprising:

[0024] at least one filter membrane package;

[0025] The clamp is suitable for clamping the filter membrane package; the filter membrane package transfer structure is arranged between the bottom surface of the filter membrane package and the bottom structure of the clamp and / or between the filter membrane package and the top plate of the clamp.

[0026] The above technical solution of the utility model has the following advantages compared with the prior art:

[0027] 1. The filter membrane package transition structure provided by the present invention is suitable for sealing and connecting the clamp and the filter membrane package. The filter membrane package transition structure includes: a flexible rubber-coated plate, suitable for sealing and fitting with the top plate of the clamp or the bottom structure of the clamp; a rigid support plate, which is arranged between the flexible rubber-coated plate and the filter membrane package, and is sealed and fitted with the flexible rubber-coated plate; the present application adopts the above technical solution, utilizing the deformable characteristics of the flexible rubber-coated plate to ensure that the filter membrane package transition structure and the clamp are sealed under pressure without the risk of leakage; at the same time, the rigid support plate is used to ensure uniform force and further improve the sealing effect.

[0028] 2. The utility model provides a plurality of first holes and a second hole at intervals near two opposite edges of the flexible rubber-coated plate, and the size of the first hole is larger than the size of the second hole; a sealing ring is provided on the outer periphery of the first hole and the second hole on the side of the flexible rubber-coated plate facing the rigid support plate; a third hole and a fourth hole are respectively provided at positions corresponding to the first hole and the second hole on the rigid support plate; the sealing ring on the outer periphery of the first hole is suitable for fitting and nesting and connecting in the third hole, and the sealing ring on the outer periphery of the second hole is suitable for fitting and nesting and connecting in the fourth hole; the present application adopts the above technical solution, and by setting the sealing ring, the assembly efficiency of the filter membrane package transfer structure can be conveniently and quickly improved, the flexible rubber-coated plate and the rigid support plate can be ensured to be quickly aligned, and the liquid to be filtered can be prevented from chemically reacting with the rigid support plate or precipitating undesirable substances, thereby affecting filtration.

[0029] 3. The filter membrane package transition structure provided by the present invention also includes: a protective plate, which is arranged between the rigid support plate and the filter membrane package; a fifth hole and a sixth hole are respectively provided at positions corresponding to the first hole and the second hole on the protective plate; the sealing ring on the periphery of the first hole is suitable for fitting and nesting in the fifth hole, and the sealing ring on the periphery of the second hole is suitable for fitting and nesting in the sixth hole; the present application adopts the above technical solution to further improve the overall strength of the filter membrane package transition structure through the protective plate, while also preventing the liquid to be filtered from contacting the rigid support plate to protect the rigid support plate.

[0030] 4. The height of the sealing ring protruding from the protective plate of the present invention ranges from 0.05 mm to 0.5 mm. This application utilizes the aforementioned technical solution, allowing the protruding sealing ring to pass through the corresponding hole in the protective plate while remaining partially exposed. This ensures that the sealing ring contacts the filter membrane package before the protective plate during clamping. After the sealing ring and filter membrane package are compressed, a circumferential seal is achieved around the corresponding hole, preventing the liquid to be filtered from entering the area between the filter membrane package adapter structure and the filter membrane package. Furthermore, under the action of pressure, the sealing ring is continuously compressed, thinning its thickness while increasing its diameter. This further increases the contact area between the sealing ring and the filter membrane package, further ensuring the sealing effect.

[0031] 5. The outer periphery of the flexible rubber-coated plate of the present invention is provided with a convex edge, and the convex edge is suitable for fitting and nesting the rigid support plate and / or the protective plate; the present application adopts the above technical solution, and by setting the convex edge, it is convenient for the filter membrane package transition structure to form a whole, which is more conducive to the installation of the filter membrane package transition structure and ensures the sealing effect.

[0032] 6. The size of the protective plate of the utility model is larger than that of the rigid support plate, and a gap is provided between the outer edge of the protective plate and the outer edge of the rigid support plate; and / or, the size of the fifth hole is smaller than that of the third hole, and the size of the sixth hole is smaller than that of the fourth hole; the present application adopts the above technical solution, by setting the size of the protective plate to be larger than that of the rigid support plate, and a gap is provided between the outer edge of the protective plate and the outer edge of the rigid support plate; so that the connection between the rigid support plate and the flexible rubber-coated plate is significantly worse than the connection between the protective plate and the flexible rubber-coated plate, therefore, the contact area between the protective plate and the flexible rubber-coated plate is increased as much as possible, thereby improving the stability of the overall connection of the filter membrane package transfer structure.

[0033] 7. The rigid support plate of the present invention has a thickness ranging from 0.5 mm to 1.5 mm, and an elastic modulus of no less than 70 GPa. This technical solution ensures that, under the clamping force of the clamp, the maximum deformation of any point on the rigid support plate is less than 0.5 mm when unstressed. Because the rigid support plate primarily enhances overall strength and smoothness, the smaller the deformation of the rigid support plate, the less deformation is transferred to the filter membrane package, thereby maximizing protection for the filter membrane package. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a partial three-dimensional structural diagram of a tangential flow filtration device in the prior art;

[0036] Figure 2 This is a schematic diagram of the three-dimensional structure of the filter membrane package transfer structure provided in the first embodiment of the present utility model;

[0037] Figure 3 This is a schematic diagram of the three-dimensional structure of the flexible rubber-coated board provided in the first embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the three-dimensional structure of the rigid support plate provided in the first embodiment of the present invention;

[0039] Figure 5 This is a schematic cross-sectional view of the filter membrane package transfer structure provided in the first embodiment of the present invention;

[0040] Figure 6 This is a schematic cross-sectional view of the filter membrane package transfer structure provided in the second embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the three-dimensional structure of the filter membrane package adapter structure provided in the third embodiment of the present utility model;

[0042] Figure 8 This is a schematic cross-sectional view of the filter membrane package transfer structure provided in the third embodiment of the present invention;

[0043] Figure 9 This is a schematic cross-sectional view of the filter membrane package transfer structure provided in the fourth embodiment of the present utility model;

[0044] Figure 10 This is a schematic cross-sectional view of the filter membrane package transfer structure provided in the fifth embodiment of the present invention;

[0045] Figure 11 for Figure 10 Schematic diagram of the local enlarged structure at A in the middle;

[0046] Figure 12 This is a schematic diagram of a three-dimensional partially exploded structure of a filtering device provided in an embodiment of the present utility model.

[0047] Description of reference numerals:

[0048] 1. Top plate; 2. Bottom structure; 3. Liquid inlet manifold; 4. Liquid outlet manifold; 5. Return manifold; 6. Flexible rubber-coated board; 7. Rigid support plate; 8. Filter membrane package; 9. First hole; 10. Second hole; 11. Sealing ring; 12. Third hole; 13. Fourth hole; 14. Protective plate; 15. Convex edge; 16. Filter membrane package transfer structure; 17. Connecting rod; 18. Groove. DETAILED DESCRIPTION

[0049] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Implementation Method 1

[0054] like Figures 2 to 5 as well as Figure 12 A specific embodiment of the filter membrane package transition structure shown is suitable for sealing and connecting the clamp and the filter membrane package 8. The filter membrane package transition structure includes: a flexible rubber coating plate 6 and a rigid support plate 7.

[0055] like Figures 2 to 4 as well as Figure 12 As shown, the flexible rubber-coated plate 6 is suitable for being fitted and sealed with the top plate 1 of the fixture or the bottom structure 2 of the fixture. The side of the flexible rubber-coated plate 6 that fits with the top plate 1 of the fixture or the bottom structure 2 of the fixture is a flat surface. The rigid support plate 7 is arranged between the flexible rubber-coated plate 6 and the filter membrane package 8, and is fitted and sealed with the flexible rubber-coated plate 6. Specifically, the thickness of the rigid support plate 7 ranges from 0.5 mm to 1.5 mm, and the elastic modulus of the rigid support plate 7 is not less than 70 GPa. The material of the rigid support plate 7 is any one of aluminum, iron, copper or stainless steel. The material of the flexible rubber-coated plate 6 is any one of PE (polyethylene resin), PA (polyamide resin), rubber, PMMA (polymethyl methacrylate), epoxy resin or PP (polypropylene). The material of the flexible rubber-coated plate 6 can meet the chemical compatibility of the liquid to be filtered, and the material has good injection molding performance, can better fill the mold, and has better flatness. The rigid support plate 7 may be a rectangular flat thin plate with uniform thickness. The four top corners of the rigid support plate 7 are respectively provided with rounded corners, and the radius of the rounded corners ranges from 5 mm to 25 mm.

[0056] like Figures 2 to 5As shown, a plurality of first holes 9 and second holes 10 are spaced apart near two opposite edges of the flexible rubber-coated board 6, and the size of the first hole 9 is larger than that of the second hole 10; a sealing ring 11 is provided on the periphery of the first hole 9 and the second hole 10 on the side of the flexible rubber-coated board 6 facing the rigid support plate 7; a third hole 12 and a fourth hole 13 are provided on the rigid support plate 7 at positions corresponding to the first hole 9 and the second hole 10; the sealing ring 11 on the periphery of the first hole 9 is suitable for fitting and nesting in the third hole 12, and the sealing ring 11 on the periphery of the second hole 10 is suitable for fitting and nesting in the fourth hole 13. Specifically, the height of the sealing ring 11 ranges from 1 mm to 3 mm. Furthermore, the flexible rubber-coated board 6 and the sealing ring 11 are provided separately or integrally, that is, the flexible rubber-coated board 6 and the sealing ring 11 can be integrally formed. When the flexible rubber-coated plate 6 and the sealing ring 11 are integrally arranged, they can be processed by injection molding. After the position of the substrate of the injection mold is fixed, the injection molding material is injected into the injection mold of a specific shape from one side until the injection molding material completely covers the substrate and the areas near the first hole 9 and the second hole 10 on the flexible rubber-coated plate 6.

[0057] Implementation Method 2

[0058] like Figure 6 As shown, the filter membrane package adapter structure also includes a protective plate 14. The protective plate 14 is disposed between the rigid support plate 7 and the filter membrane package 8. A fifth hole and a sixth hole are provided on the protective plate 14 at positions corresponding to the first hole 9 and the second hole 10, respectively. The sealing ring 11 around the first hole 9 is adapted to fit snugly and nest within the fifth hole, and the sealing ring 11 around the second hole 10 is adapted to fit snugly and nest within the sixth hole, i.e., the sealing ring 11 can be fixedly connected to the protective plate 14. The protective plate 14 completely covers the rigid support plate 7. Furthermore, the height of the sealing ring 11 protruding from the protective plate 14 ranges from 0.05 mm to 0.5 mm. Specifically, the material of the protective plate 14 is any one of PP, PE, PVDF (polyvinylidene fluoride), PES (polyethersulfone), or PET (polyester resin). The materials of the above protective plates are absolutely biosafe to prevent the liquid to be filtered from chemically reacting with the rigid support plate or precipitating undesirable substances. The other technical solutions are the same as those in the first embodiment.

[0059] Implementation Method 3

[0060] like Figure 7 and Figure 8 As shown, the outer periphery of the flexible rubber-coated sheet 6 is provided with a flange 15. The flange 15 can also be integrally formed with the flexible rubber-coated sheet 6. The rigid support sheet 7 is located within the flange 15, and the flange 15 is adapted to fit snugly and nest with the rigid support sheet 7. The remaining technical solutions are the same as those in the first embodiment.

[0061] Implementation Method 4

[0062] like Figure 9 As shown, the outer periphery of the flexible rubber-coated sheet 6 is provided with a flange 15. The rigid support sheet 7 and the protective sheet 14 are both located within the flange 15, and the flange 15 is adapted to fit snugly and nestedly connect the rigid support sheet 7 and the protective sheet 14. Of course, the flange 15 may also be fixedly connected only to the protective sheet 14. The remaining technical solutions are the same as those in the second embodiment.

[0063] Implementation Method Five

[0064] like Figure 10 and Figure 11 As shown, instead of the protective plate 14 completely covering the rigid support plate 7, the protective plate 14 is larger than the rigid support plate 7, with a gap between the outer edge of the protective plate 14 and the outer edge of the rigid support plate 7; and / or the fifth hole is smaller than the third hole 12, and the sixth hole is smaller than the fourth hole 13; the convex edge 15 and / or the sealing ring 11 have a stepped cross-section. Other technical solutions are the same as those in the fourth embodiment.

[0065] like Figure 12 A specific embodiment of the filtration device shown includes: at least one filtration membrane package 8 and a fixture. The fixture includes: a top plate 1, a bottom structure 2 and a plurality of connecting rods 17.

[0066] When the number of filter membrane packages 8 is greater than two, the multiple filter membrane packages 8 are stacked. The clamp is suitable for clamping the filter membrane packages 8. Because a groove 18 suitable for the flow of filtered liquid is provided on the top surface of the bottom structure 2, the filter membrane package adapter structure 16 is provided between the bottom surface of the filter membrane package 8 and the bottom structure 2 of the clamp. Of course, the filter membrane package adapter structure 16 can also be provided between the top surface of the filter membrane package 8 and the top plate 1 of the clamp. The top plate 1 and the bottom structure 2 are both in contact with the flexible rubberized sheet 6. Multiple connecting rods 17 connect the top plate 1 and the bottom structure 2, and the multiple connecting rods 17 are arranged around the filter membrane package 8 and the filter membrane package adapter structure 16. Specifically, four connecting rods 17 can be evenly distributed around the filter membrane package 8. Stop grooves are provided at the locations where the filter membrane package 8 and the filter membrane package adapter structure 16 contact the connecting rods 17. The ends of the connecting rods 17 are locked with nuts to form a complete filtration device. Specifically, the filtration device is a tangential flow filtration device. The bottom structure 2 is provided with a liquid inlet manifold 3, a return manifold 5 and a liquid outlet manifold 4; the liquid outlet manifold 4 can refer to Figure 1The inlet manifold 3 and the return manifold 5 are both connected to the multiple first holes 9 provided on the flexible rubber-coated plate 6; the multiple second holes 10 provided on the flexible rubber-coated plate 6 are connected to each other through multiple dispersed grooves 18 on the bottom structure 2, and the multiple grooves 18 are connected to the outlet manifold 4. This application also ensures the sealing of the grooves 18 by sealing the flexible rubber-coated plate 6 in the filter membrane package transfer structure 16 with the bottom structure 2, preventing the filtered liquid from leaking and affecting the filtration effect.

[0067] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

Claims

1. A filter membrane package transfer structure, characterized in that: Suitable for sealing and connecting a clamp and a filter membrane package (8), the filter membrane package transfer structure comprises: A flexible rubber-coated plate (6) adapted to be fitted and sealed with the top plate (1) or the bottom structure (2) of the fixture; The rigid support plate (7) is arranged between the flexible rubber-coated plate (6) and the filter membrane package (8), and is arranged to fit and seal with the flexible rubber-coated plate (6).

2. The filter membrane package transfer structure according to claim 1, characterized in that: A plurality of first holes (9) and second holes (10) are provided at intervals near two opposite edges of the flexible rubber-coated plate (6), and the size of the first hole (9) is larger than the size of the second hole (10); a sealing ring (11) is provided on the outer periphery of the first hole (9) and the second hole (10) on the side of the flexible rubber-coated plate (6) facing the rigid support plate (7); a third hole (12) and a fourth hole (13) are provided on the rigid support plate (7) at positions corresponding to the first hole (9) and the second hole (10); the sealing ring (11) on the outer periphery of the first hole (9) is suitable for being fitted and nested in the third hole (12), and the sealing ring (11) on the outer periphery of the second hole (10) is suitable for being fitted and nested in the fourth hole (13).

3. The filter membrane package transfer structure according to claim 2, characterized in that: Also includes: A protective plate (14) is arranged between the rigid support plate (7) and the filter membrane package (8); a fifth hole and a sixth hole are respectively provided on the protective plate (14) at positions corresponding to the first hole (9) and the second hole (10); a sealing ring (11) around the outer periphery of the first hole (9) is suitable for fitting and nesting in the fifth hole, and a sealing ring (11) around the outer periphery of the second hole (10) is suitable for fitting and nesting in the sixth hole.

4. The filter membrane package transfer structure according to claim 3, characterized in that: The height of the sealing ring (11) protruding from the protection plate (14) ranges from 0.05 mm to 0.5 mm.

5. The filter membrane package transfer structure according to claim 3 or 4, characterized in that: The outer periphery of the flexible rubber-coated board (6) is provided with a convex edge (15), and the convex edge (15) is suitable for fitting and nesting with the rigid support board (7) and / or the protection board (14).

6. The filter membrane package transfer structure according to claim 5, characterized in that: The sealing ring (11) and / or the flange (15) are integrally formed with the flexible rubber-coated board (6).

7. The filter membrane package transfer structure according to claim 5, characterized in that: The sealing ring (11) and / or the flange (15) are fixedly connected to the protection plate (14).

8. The filter membrane package transfer structure according to claim 5, characterized in that: The size of the protection plate (14) is larger than the size of the rigid support plate (7), and a gap is provided between the outer edge of the protection plate (14) and the outer edge of the rigid support plate (7); And / or, the size of the fifth hole is smaller than the size of the third hole (12), and the size of the sixth hole is smaller than the size of the fourth hole (13).

9. The filter membrane package transfer structure according to claim 8, characterized in that: The cross-sectional shape of the convex edge (15) and / or the sealing ring (11) is step-shaped.

10. The filter membrane package transfer structure according to claim 1, characterized in that: The thickness of the rigid support plate (7) ranges from 0.5 mm to 1.5 mm, and the elastic modulus of the rigid support plate (7) is not less than 70 GPa; And / or, the material of the rigid support plate (7) is any one of aluminum, iron, copper or stainless steel; And / or, the material of the flexible rubber-coated board (6) is any one of PE, PA, rubber, PMMA, epoxy resin or PP.

11. The filter membrane package transfer structure according to claim 3, characterized in that: The material of the protection plate (14) is any one of PP, PE, PVDF, PES or PET.

12. A filtering device, characterized in that: include: at least one filter membrane package (8); A clamp is suitable for clamping the filter membrane package (8); a filter membrane package transfer structure (16) according to any one of claims 1 to 11 is provided between the filter membrane package (8) and the bottom structure (2) of the clamp and / or between the filter membrane package (8) and the top plate (1) of the clamp.

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