Film bag

Abstract

The membrane bag comprises a filtering part, and the filtering part comprises a first unit and a second unit which are alternately stacked; the first unit comprises a first screen and filtering layers located on the two sides of the first screen, and a first communicating hole and a first packaging hole are formed in the first unit; the edge of the first screen protrudes out of the edge of the filter layer to form a protruding part, and a first peripheral sealing piece is arranged on the protruding part in a surrounding mode; the second unit comprises a second screen, the edge of the second screen is provided with a second peripheral sealing piece in a surrounding mode, and the second peripheral sealing piece is bonded to the end face of the first unit; the second unit is provided with a second communicating hole and a second packaging hole; the bonding area is formed on the end face of the first peripheral sealing piece, the first peripheral sealing piece is bonded with the second peripheral sealing piece through the bonding area, and the advantages of being stable in connection and high in sealing performance are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of filtration equipment, and in particular to a membrane pack. Background Technology

[0002] Membrane packs typically include a filtration section and a sealing structure. The filtration section is formed by stacking screens and filter layers. The screens are divided into inlet screens and filtrate screens. The filtrate screens and filter layers are usually edged by adhesive stripping to pre-encapsulate them into filtrate units. The filtrate units and inlet screens are then stacked together to form the filtration section.

[0003] For example, CN113164875A discloses a disposable sterile tangential flow filtration system and method, specifically disclosing that: a membrane 40 is positioned between a feed channel spacer 30 and a filtrate channel spacer 20. An adhesive film 70 is used to bond the alternating layers of the filtrate channel spacer 20, the membrane 40, and the feed channel spacer 30. It is understood that the connection and sealing between the feed screen and the filtrate unit are achieved using the adhesive film 70.

[0004] However, when using the above method, the filter layer is not easy to bond, which easily leads to poor connection stability between the inlet screen and the filter layer, and between the filter layer and the filtrate screen. This further results in a lack of relatively stable connection between the inlet screen and the encapsulated filtrate unit within the membrane package. During transportation and use, the inlet screen is prone to displacement or wrinkling under the action of external forces (such as fluid forces, external extrusion pressure on the membrane package, etc.), affecting the filtration effect and efficiency, and even further causing the perimeter of the membrane package to lose its seal, resulting in leakage of the feed liquid. In addition, the inlet screen may also further affect the adjacent filter layer, resulting in poor connection stability and sealing of the entire membrane package. Utility Model Content

[0005] The technical problem to be solved by this invention is to overcome the defects in the prior art and thus provide a membrane packing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A membrane package includes a filter section comprising alternating stacked first and second units. The first unit includes a first screen and filter layers located on both sides of the first screen. The first unit has a first connecting hole and a first encapsulation hole, the first connecting hole communicating with the first screen and the first encapsulation hole sealing the first screen. The edge of the first screen protrudes beyond the edge of the filter layers to form a protrusion, and a first peripheral seal is surrounding the protrusion for fluid sealing of the first screen edge and for fixed connection of the first screen and the filter layers. The second unit includes a second screen, the edge of which is surrounded by a second peripheral seal, which is bonded to the end face of the first unit. The second unit has a second connecting hole and a second encapsulation hole, the second connecting hole facing the first encapsulation hole and communicating with the second screen; the second encapsulation hole facing the first connecting hole and sealing the second screen. An adhesive area is formed on the end face of the first peripheral seal, and the adhesive area bonds the first peripheral seal to the second peripheral seal.

[0008] In the above scheme, by surrounding the protrusion formed on the edge of the first screen with a first peripheral seal, both pre-sealing of the edge of the first screen and fixed connection between the edge of the first screen and the edge of the filter layer can be achieved, ensuring the connection stability and flatness of the first screen and the filter layer. Furthermore, by surrounding the edge of the second screen with a second peripheral seal, and bonding the second peripheral seal to the end face of the first unit, the bonding area between the second screen and the first unit can be increased, enabling a stable connection between them, thereby making the entire filtration section more stable. Even further, the end face of the first peripheral seal forms a bonding area, and through this bonding area, it bonds with the second peripheral seal. On the one hand, this increases the stability of the connection between the second screen and the first screen; on the other hand, after the first and second peripheral seals are bonded together, the first and second screens can press the filter layer tightly from both ends of the filter layer, preventing wrinkles in the filter layer, and further improving the sealing performance of the edges of the first screen, the filter layer, and the second screen, reducing the risk of membrane leakage. Furthermore, it should be understood that after the first unit and the second unit are stacked, the thickness of the entire filter section can be better controlled by the mutual bonding of the first peripheral seal and the second peripheral seal, and the membrane pack can be made flat overall. Moreover, the first peripheral seal and the second peripheral seal can form a relatively complete sealing structure at the edge of the filter section, ensuring the sealing performance of the filter section while giving the periphery of the filter section a certain degree of resistance to deformation, further ensuring the flatness and sealing of the membrane pack as a whole.

[0009] Preferably, the second peripheral seal covers at least the edge region of the filter layer.

[0010] In the above solution, by covering the edge area of ​​the filter layer with a second peripheral seal, when the first unit and the second unit are stacked, the second peripheral seal can be used to limit the periphery of the filter layer, which helps to maintain the flatness of the filter layer and prevents the filter layer from wrinkling due to fluid forces during use. At the same time, it can also increase the sealing performance of the filter layer edge area.

[0011] Preferably, the first peripheral seal includes a joint extending inward along the first screen, the joint being located between two filter layers.

[0012] In the above scheme, the stability of the first peripheral seal to the filter layer can be improved by extending the first peripheral seal inward, which can further increase the flatness and sealing of the filter layer.

[0013] Preferably, the joint portion and the projection of the second peripheral seal on the plane of the filter layer at least partially overlap to form an overlapping area, and there is a gap between the bonding area and the inner edge of the overlapping area to form a compression area inside the bonding area.

[0014] In the above scheme, an overlapping area is formed between the joint (first peripheral seal) formed on the first screen and the second peripheral seal formed on the second screen. The joint is located on one end face of the filter layer, and the second peripheral seal is located on the other end face of the filter layer. When the joint and the second peripheral seal are stacked and pressed together, the joint and the second peripheral seal can press the edge of the filter layer within the overlapping area to ensure the flatness of the filter layer. At the same time, there is a gap between the inner edge of the bonding area and the overlapping area, so that the pressing area where the second peripheral seal and the joint are pressed together is formed inside the bonding area, thereby reducing the seepage of liquid into the pressing area, and further reducing the influence of the adhesive in the bonding area on the liquid.

[0015] Preferably, the bonding area includes a first bonding area bonded between the filter layer and the second peripheral seal, and a second bonding area bonded between the first peripheral seal and the second peripheral seal.

[0016] In the above scheme, bonding the second peripheral seal and the filter layer through the first bonding area can further increase the stability of the bonding between the second screen and the first unit. Simultaneously, connecting the first peripheral seal on the first screen, the second peripheral seal on the second screen, and the side of the filter layer through the second bonding area makes the entire membrane pack bonding more stable and the sealing performance better. Furthermore, one end face of the filter layer is constrained by the first bonding area (bonding or clamping limit), and the other end face is constrained by the bonding area (bonding or clamping limit), while the sidewall is bonded to the side seal, ensuring the flatness and sealing performance of the filter layer.

[0017] Preferably, the outer edges of the first screen and the second screen coincide; or, there is a preset gap between the outer edges of the first screen and the second screen, the width of which is no greater than 3mm.

[0018] In the above scheme, the first screen is formed inside the first peripheral seal and the second screen is formed inside the second peripheral seal, and the outer edges of the first screen and the second screen overlap, thereby ensuring the flatness of the membrane edge. At the same time, the first peripheral seal, the second peripheral seal, the first screen and the second screen can support each other to ensure the stability of the entire membrane edge.

[0019] Preferably, the second peripheral seal penetrates and protrudes from the second screen along the thickness direction.

[0020] In the above scheme, by having the second peripheral seal protrude slightly beyond the second screen along the thickness direction, the flow channel structure formed in the second screen can be made more stable. At the same time, since the second peripheral seal protrudes beyond the second screen, its surface can reduce the influence of the screen on the bonding area after compression, making the bonding structure more reliable.

[0021] Preferably, the distance D between the outer edge of the bonding area and the outer edge of the first screen is within the range of 0 ≤ D ≤ 2 mm.

[0022] In the above scheme, the distance D between the outer edge of the bonding area and the outer edge of the first screen is reasonably set, so that the bonding area between the first screen and the bonding area is larger. At the same time, the first screen and the bonding area serve as a supporting structure for the edge of the membrane package, which further enables the membrane package to maintain good support strength and sealing performance even without a shell.

[0023] Preferably, the first screen is configured as a filtrate screen; the second screen is configured as a liquid inlet screen.

[0024] Preferably, the second peripheral seal is fixedly disposed on the second screen; the second connecting hole and the second sealing hole both penetrate the second screen; and a hole seal is disposed around the edge of the second sealing hole.

[0025] Preferably, the hole seal and the second peripheral seal are integrally formed; or, the hole seal and the second peripheral seal are respectively set independently, and the hole seal is a sealing ring provided around the edge of the second encapsulation hole.

[0026] Preferably, the hole seal and the second peripheral seal are integrally formed; or, the hole seal and the second peripheral seal are respectively set independently, and the hole seal is a sealing ring provided around the edge of the second encapsulation hole.

[0027] In the above solution, by making the orifice seal and the second peripheral seal integrally molded, a small gap between the orifice seal and the second peripheral seal can be avoided, thus preventing material retention. Furthermore, by setting the orifice seal and the second peripheral seal relatively independently, the second peripheral seal and the orifice seal can be welded separately, simplifying processing and preventing interference between them. This also allows the orifice seal to better encapsulate the edge of the second encapsulation hole, preventing the orifice seal from obstructing the second encapsulation hole.

[0028] Preferably, the second connecting hole penetrates the second screen, the second screen has a clearance area in the second encapsulation hole area, the second peripheral seal is fixedly connected to the edge of the second screen and surrounds the second encapsulation hole in the clearance area, and the second encapsulation hole is fluidly sealed to the first screen through the second peripheral seal.

[0029] In the above scheme, the second encapsulation hole is directly formed on the second peripheral seal, thereby making the second encapsulation hole and the second screen not connected, and completely blocked by the second peripheral seal, thus making the sealing effect between the second encapsulation hole and the edge of the first screen better.

[0030] Preferably, the bonding area includes a hole bonding area surrounding the second encapsulation hole, or the second encapsulation hole has an abutment area that abuts against the end face of the filter layer.

[0031] In the above solution, the bonding or abutment area around the second encapsulation hole increases the effective connection area between the second screen and the filter layer, enhancing the stability of their connection. It also allows the connection position to be controlled within the non-filtration area of ​​the membrane package, preventing any impact on filtration efficiency. Furthermore, it further enhances the sealing around the second encapsulation hole.

[0032] The filter section has a termination unit on at least one end face. The termination unit includes at least a connected third screen and a filter layer, which is disposed on the side of the termination unit facing the filter section.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] 1. By surrounding the protrusion formed on the edge of the first screen with a first peripheral seal, both pre-sealing of the first screen edge and fixed connection between the first screen edge and the filter layer edge can be achieved, ensuring the connection stability and flatness of the first screen and the filter layer. Furthermore, by surrounding the edge of the second screen with a second peripheral seal, and bonding the second peripheral seal to the end face of the first unit, the bonding area between the second screen and the first unit can be increased, enabling a stable connection between them, thereby making the entire filtration section more stable. Even further, the end face of the first peripheral seal forms a bonding area, and through this bonding area, it bonds with the second peripheral seal. On the one hand, this increases the stability of the connection between the second screen and the first screen; on the other hand, after the first and second peripheral seals are bonded together, the first and second screens can press the filter layer tightly from both ends of the filter layer, preventing wrinkles in the filter layer, and further improving the sealing performance of the edges of the first screen, the filter layer, and the second screen, reducing the risk of membrane leakage. Furthermore, it should be understood that after the first unit and the second unit are stacked, the thickness of the entire filter section can be better controlled by the mutual bonding of the first peripheral seal and the second peripheral seal, and the membrane pack can be made flat overall. Moreover, the first peripheral seal and the second peripheral seal can form a relatively complete sealing structure at the edge of the filter section, ensuring the sealing performance of the filter section while giving the periphery of the filter section a certain degree of resistance to deformation, further ensuring the flatness and sealing of the membrane pack as a whole.

[0035] 2. An overlapping area is formed between the joint (first peripheral seal) formed on the first screen and the second peripheral seal formed on the second screen. The joint is located on one end face of the filter layer, and the second peripheral seal is located on the other end face of the filter layer. When the joint and the second peripheral seal are stacked and pressed together, they can press the edge of the filter layer within the overlapping area to ensure the flatness of the filter layer. At the same time, there is a gap between the inner edge of the bonding area and the overlapping area, so that the pressing area formed by the mutual pressing of the second peripheral seal and the joint is formed inside the bonding area, thereby reducing the seepage of liquid into the pressing area and further reducing the influence of the adhesive in the bonding area on the liquid.

[0036] 3. By bonding the second peripheral seal and the filter layer through the first bonding area, the stability of the bonding between the second screen and the first unit can be further increased. Simultaneously, by connecting the first peripheral seal on the first screen, the second peripheral seal on the second screen, and the side of the filter layer through the second bonding area, the bonding of the entire membrane package becomes more stable and the sealing performance is better. Furthermore, one end face of the filter layer is constrained by the first bonding area (bonding or clamping limit), and the other end face is constrained by the bonding or clamping limit joint area, while the sidewall is bonded to the side seal, ensuring the flatness and sealing performance of the filter layer. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0039] Figure 2 for Figure 1 An enlarged diagram of position D1.

[0040] Figure 3 for Figure 1 An enlarged view of position D2 in the middle.

[0041] Figure 4 for Figure 1 A structural diagram of the second unit.

[0042] Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0043] Figure 6 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0044] Figure 7 for Figure 6 Enlarged diagram of position D3 in the middle.

[0045] Figure 8 This is a structural schematic diagram of Embodiment 4 of the present utility model.

[0046] Figure 9 for Figure 8 Enlarged diagram of position D4 in the middle.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. First unit; 10. Filter layer; 11. First screen; 12. First connecting hole; 13. First sealing hole; 2. Second unit; 21. Second screen; 22. Second connecting hole; 23. Second sealing hole; 3. First peripheral seal; 31. Joint; 32. Side seal; 4. Second peripheral seal; 5. Adhesive area; 51. First adhesive area; 52. Second adhesive area; 53. Hole adhesive area; 6. Hole seal; 7. Third screen; 8. Overlapping area. Detailed Implementation

[0049] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[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 the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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 explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] Example 1

[0053] See Figures 1 to 4 This utility model provides a membrane package including a filter section. Specifically, the filter section includes a first unit 1 and a second unit 2 arranged alternately. The first unit 1 includes a first screen 11 and filter layers 10 located on both sides of the first screen 11. The first unit 1 has a first connecting hole 12 and a first sealing hole 13. The first connecting hole 12 communicates with the first screen 11, and the first sealing hole 13 seals with the first screen 11. The second unit 2 includes a second screen 21. The second unit 2 has a second connecting hole 22 and a second sealing hole 23. The second connecting hole 22 is disposed opposite to the first sealing hole 13 and communicates with the second screen 21. The second sealing hole 23 is disposed opposite to the first connecting hole 12 and seals with the second screen 21. In this embodiment, the first screen 11 is configured as a filtrate screen; the second screen 21 is configured as a liquid inlet screen. It should be understood that the first connecting hole 12 includes filtrate holes disposed on the filtrate screen, and the first sealing hole 13 includes liquid inlet holes disposed on the filtrate screen. Correspondingly, the second connecting hole 22 is a liquid inlet hole disposed on the liquid inlet screen, and the second sealing hole 23 is a filtrate hole disposed on the liquid inlet screen.

[0054] Furthermore, the edge of the first screen 11 protrudes beyond the edge of the filter layer 10 to form a protrusion. A first peripheral seal 3 is arranged around the protrusion to provide a fluid seal for the edge of the first screen 11 and to fix the first screen 11 and the filter layer 10 together. It should be understood that the first peripheral seal 3 can encapsulate the first unit 1. It is arranged around the protrusion formed by the edge of the first screen 11, which can both pre-seal the edge of the first screen 11 and fix the edge of the first screen 11 and the edge of the filter layer 10 together, so as to ensure the connection stability and flatness of the first screen 11 and the filter layer 10. At the same time, the pre-encapsulated first unit 1 can also facilitate its stacking with the second unit 2.

[0055] In order to facilitate a stable connection between the second unit 2 and the first unit 1, a second peripheral seal 4 is provided around the edge of the second screen 21. The second peripheral seal 4 is bonded to the end face of the first unit 1, thereby making the entire filtration section more stable.

[0056] Furthermore, the end face of the first peripheral seal 3 forms an adhesive area 5, which is bonded to the second peripheral seal 4. On the one hand, this increases the stability of the connection between the second screen 21 and the first screen 11; on the other hand, after the first peripheral seal 3 and the second peripheral seal 4 are bonded together, the first screen 11 and the second screen 21 can press the filter layer 10 tightly from both ends of the filter layer 10, preventing wrinkles in the filter layer 10, and further improving the sealing performance of the edges of the first screen 11, the filter layer 10, and the second screen 21, reducing the risk of membrane leakage. In addition, it should be understood that after the first unit 1 and the second unit 2 are stacked, the first peripheral seal 3 and the second peripheral seal 4 bond together, which can better control the thickness of the entire filter section and make the membrane package flat overall. Moreover, the first peripheral seal 3 and the second peripheral seal 4 can form a relatively complete sealing structure at the edge of the filter section, ensuring the sealing performance of the filter section while giving the periphery of the filter section a certain degree of resistance to deformation, further ensuring the overall flatness and sealing performance of the membrane package.

[0057] To increase the bonding area between the second screen 21 and the first unit 1, and thus increase their bonding strength, the projection of the second peripheral seal 4 onto the filter layer at least covers the edge region of the filter layer 10. It should be understood that when the first unit 1 and the second unit 2 are stacked, the area of ​​the filter layer 10 covered by the second peripheral seal 4 can press against the end face of the filter layer 10, thereby helping to maintain the flatness of the filter layer 10, preventing wrinkles caused by fluid forces during use, and also increasing the sealing performance of the edge region of the filter layer 10.

[0058] See Figures 1 to 3 The first peripheral seal 3 includes a joint 31 extending inward along the first screen 11. The joint 31 is located between the two filter layers 10. By extending the first peripheral seal 3 inward, the connection stability and sealing between the first peripheral seal 3 and the filter layer 10 can be improved, which is conducive to maintaining the flatness of the filter layer 10 and avoiding wrinkles caused by the fluid force during use.

[0059] Furthermore, the projections of the joint 31 and the second peripheral seal 4 on the plane of the filter layer 10 at least partially overlap to form an overlap area 8. A gap exists between the bonding area 5 and the inner edge of the overlap area 8 to form a compression area inside the bonding area 5. It is understood that in the above scheme, the overlap area 8 is formed between the joint 31 (first peripheral seal 3) formed on the first screen 11 and the second peripheral seal 4 formed on the second screen 21. The joint 31 is located on one end face of the filter layer 10, and the second peripheral seal 4 is located on the other end face of the filter layer 10. When the joint 31 and the second peripheral seal 4 are stacked and compressed, within the overlap area 8, the joint 31 and the second peripheral seal 4 can compress the edge of the filter layer 10 to ensure the flatness of the filter layer 10. Meanwhile, there is a gap between the inner edges of the bonding area 5 and the overlapping area 8, so that the extrusion area where the second peripheral seal 4 and the joint 31 are squeezed against each other is formed on the inner side of the bonding area 5, thereby reducing the seepage of the material into the extrusion area, and further reducing the influence of the adhesive in the bonding area 5 on the material.

[0060] Furthermore, the first peripheral seal 3 also includes a side seal portion 32 that protrudes from the end face of the first screen 11 and is bonded to the sidewall of the filter side. It should be understood that the first peripheral seal 3 is bonded to the periphery of the first screen 11 and the filter layer 10, thereby pre-encapsulating the first screen 11 and the filter layer 10 into the first unit 1, ensuring the stability and sealing of the connection between the first screen 11 and the filter layer 10.

[0061] See Figures 1 to 4 The second peripheral seal 4 is fixedly disposed on the second screen 21; the second connecting hole 22 and the second encapsulation hole 23 both penetrate the second screen 21; a hole seal 6 is disposed around the edge of the second encapsulation hole 23.

[0062] Specifically, the orifice seal 6 and the second peripheral seal 4 are disposed relatively independently. The orifice seal 6 is a sealing ring surrounding the edge of the second encapsulation hole 23. This method allows the second peripheral seal 4 and the orifice seal 6 to be welded separately, simplifying the manufacturing process and preventing interference between them. Furthermore, it allows the orifice seal 6 to be better encapsulated around the edge of the second encapsulation hole 23, preventing it from obstructing the second encapsulation hole 23. Alternatively, in another embodiment, the orifice seal 6 and the second peripheral seal 4 can be integrally formed, thus avoiding small gaps between them and preventing liquid stagnation that could affect filtration efficiency.

[0063] Furthermore, the second peripheral seal 4 penetrates and protrudes from the second screen 21 along the thickness direction. It should be understood that the second peripheral seal 4 protruding slightly from the second screen 21 along the thickness direction can make the flow channel structure formed in the second screen 21 more stable. At the same time, since the second peripheral seal 4 protrudes from the second screen 21, its surface, after compression, can reduce the influence of the screen on the bonding area 5, making the bonding structure more reliable.

[0064] See Figures 1 to 4 The bonding area 5 includes a first bonding area 51 bonded between the filter layer 10 and the second peripheral seal 4, and a second bonding area 52 bonded between the first peripheral seal 3 and the second peripheral seal 4. It is worth noting that in this design, the first bonding area 51 is not mandatory; a partial bonding to the filter layer 10 and a partial bonding to the second peripheral seal 4 can improve the overall stability of the membrane package. In other designs, the bonding area 5 may only include the second bonding area 52.

[0065] It is understandable that bonding the second peripheral seal 4 and the filter layer 10 through the first bonding area 51 can further increase the stability of the bonding between the second screen 21 and the first unit 1. Simultaneously, connecting the first peripheral seal 3 on the first screen 11, the second peripheral seal 4 on the second screen 21, and the side of the filter layer 10 through the second bonding area 52 further enhances the stability of the entire membrane bonding and improves sealing. Furthermore, one end face of the filter layer 10 is constrained by the first bonding area 51 (bonding or clamping), and the other end face is constrained by the joint 31 (bonding or clamping), while the sidewall is bonded to the side sealing portion 32, ensuring the flatness and sealing of the filter layer 10.

[0066] Furthermore, the bonding area 5 also includes a hole bonding area 53 surrounding the second encapsulation hole 23. It is understood that the hole bonding area 53 surrounding the second encapsulation hole 23 increases the effective connection area between the second screen 21 and the filter layer 10, increasing the stability of the connection, and also controls the connection position within the non-filtration area of ​​the membrane package, avoiding impact on filtration efficiency. In addition, it further enhances the sealing around the second encapsulation hole 23.

[0067] It is worth noting that the hole bonding area 53 can be disposed on the end face of the hole seal 6 or on the end face of the second peripheral seal 4. Furthermore, to achieve the same effect, in another embodiment, the second encapsulation hole 23 can also have an abutment area around it, abutting against the end face of the filter layer 10 through the abutment area. The abutment area can be additionally provided with a gasket, non-woven fabric layer, or other structures. Similarly, the abutment area can also be disposed on the second peripheral seal 4 or on the hole seal 6.

[0068] See Figure 1 and Figure 2 The outer edges of the first screen 11 and the second screen 21 overlap. The first screen 11 is formed inside the first peripheral seal 3, and the second screen 21 is formed inside the second peripheral seal 4. This allows the first peripheral seal 3, the second peripheral seal 4, the first screen 11, and the second screen 21 to support each other, further ensuring the stability of the entire membrane edge.

[0069] Of course, in other embodiments, there may be a preset gap between the outer edge of the first screen 11 and the outer edge of the second screen 21, and the value of the preset gap may be no greater than 3mm.

[0070] Example 2

[0071] See Figure 5 Based on the above embodiment one, the difference in this embodiment is that: the second connecting hole 22 penetrates the second screen 21, the second screen 21 has a clearance area in the region of the second sealing hole 23, the second peripheral seal 4 is fixedly connected to the edge of the second screen 21, and surrounds the second sealing hole 23 in the clearance area, and the second sealing hole 23 is fluidly sealed to the first screen 11 through the second peripheral seal 4. It can be understood that in this method, the second sealing hole 23 is directly formed on the second peripheral seal 4, so that the second sealing hole 23 and the second screen 21 are not connected, but are completely blocked by the second peripheral seal 4, thereby making the sealing effect between the second sealing hole 23 and the edge of the first screen 11 better.

[0072] Example 3

[0073] See Figure 6 and Figure 7Based on the above embodiment one, the difference in this embodiment is that there is a certain distance between the outer edge of the bonding area 5 and the outer edge of the first screen 11. The distance D can be set to 0.5mm, 1mm, or 2mm. Of course, the value of D only needs to satisfy: 0≦D≦2mm. By reasonably setting the distance D between the outer edge of the bonding area 5 and the outer edge of the first screen 11, the bonding area between the first screen 11 and the bonding area 5 is larger. At the same time, the first screen 11 and the bonding area 5 serve as the supporting structure for the edge of the membrane package, further enabling the membrane package to maintain good support strength and sealing performance even without a shell. It is worth noting that D=0mm means that the outer edge of the first screen 11 is flush with the outer edge of the bonding area 5, which is the structure corresponding to embodiment one.

[0074] Example 4

[0075] See Figure 8 and Figure 9 Based on the above embodiment one, the difference in this embodiment is that: the two end faces of the filter section have termination units, and the termination unit includes at least a connected third screen 7 and a filter layer 10, with the filter layer 10 disposed on the side of the termination unit facing the filter section. The third screen 7 is configured as a filtrate screen. It can be understood that the termination unit is configured as an encapsulation structure, formed by encapsulating the third screen 7 and the filter layer 10.

[0076] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A membrane pack comprising a filter portion, characterised in that, The filter part comprises first units and second units arranged in an alternating stack; The first unit comprises a first screen and filter layers on both sides of the first screen, and has first communication holes and first packaging holes, the first communication holes being in communication with the first screen, and the first packaging holes being sealed with the first screen; The edge of the first screen protrudes from the edge of the filter layer to form a protruding part, and a first peripheral seal is arranged around the protruding part to fluidly seal the edge of the first screen and fixedly connect the first screen and the filter layer; The second unit comprises a second screen, and the edge of the second screen is arranged around a second peripheral seal which is bonded to the end face of the first unit; The second unit has second communication holes and second packaging holes, the second communication holes being arranged opposite the first packaging holes and being in communication with the second screen, and the second packaging holes being arranged opposite the first communication holes and being sealed with the second screen; The end face of the first peripheral seal forms a bonding area, and the first peripheral seal is bonded to the second peripheral seal through the bonding area.

2. The film package of claim 1, wherein, The second peripheral seal covers at least the edge region of the filter layer.

3. The film package of claim 2, wherein, The first peripheral seal comprises a joint part extending inwardly along the first screen, and the joint part is located between the two filter layers.

4. The film package of claim 3, wherein, The projection of the joint part and the second peripheral seal on the plane of the filter layer at least partially overlaps to form an overlapping area, and a gap is provided between the inner side edge of the bonding area and the overlapping area to form a pressing area inside the bonding area.

5. The film package of claim 4, wherein, The bonding area comprises a first bonding area bonded between the filter layer and the second peripheral seal, and a second bonding area bonded between the first peripheral seal and the second peripheral seal.

6. The film package of claim 2, wherein, The outer edge of the first screen coincides with the outer edge of the second screen. Alternatively, a preset gap is provided between the outer edge of the first screen and the outer edge of the second screen, and the width of the gap is not greater than 3 mm.

7. The film package of claim 1, wherein The second peripheral seal penetrates in the thickness direction and protrudes from the second screen.

8. The film package of claim 1, wherein, The distance D between the outer edge of the bonding area and the outer edge of the first screen is in the range of 0≦D≦2 mm.

9. The film package of claim 1, wherein, The first screen is arranged as a filtrate screen, and the second screen is arranged as a liquid inlet screen.

10. The film package according to claim 1 or 9, characterized in that, The second peripheral seal is fixedly arranged on the second screen. The second communication holes and the second packaging holes both penetrate the second screen. A hole seal is arranged around the edge of the second packaging hole.

11. The film package of claim 10, wherein, The hole seal is integrally formed with the second peripheral seal. Alternatively, The hole seal is independently arranged relative to the second peripheral seal, and the hole seal is a sealing ring arranged around the edge of the second packaging hole.

12. The film package according to claim 1 or 8, characterized by The second communication hole penetrates the second screen, and the second screen has a displacement area in the region of the second packaging hole, The second peripheral seal is fixedly connected to the edge of the second screen and encloses the second packaging hole in the displacement area, and the second packaging hole is fluidly sealed with the first screen through the second peripheral seal.

13. The film package according to any one of claims 10 to 12, characterized in that The bonding area comprises a hole bonding area around the periphery of the second packaging hole, Alternatively, The periphery of the second packaging hole has an abutting area which abuts against the end face of the filter layer.

14. The film package of claim 1, wherein, At least one side end face of the filter part has a termination unit, which at least comprises a third screen and a filter layer arranged on the side of the termination unit facing the filter part.

Images