High-flatness filtering membrane bag

Abstract

The utility model discloses a high flatness filter membrane bag, which comprises a membrane bag main body, at least one side of the outer part of the membrane bag main body is provided with a composite cover plate, the composite cover plate comprises at least two layers of cover plate bodies, the hardness of the adjacent cover plate bodies is different, and the peripheries of the membrane bag main body and the composite cover plate are coated with rubber coating pieces. The membrane bag main body is provided with a liquid inlet, a reflux inlet and a liquid outlet, the cover plate body is provided with through holes respectively corresponding to the liquid inlet, the reflux inlet and the liquid outlet, and a common sealing ring is arranged on the inner side wall of the corresponding through hole of the cover plate body. By arranging the composite cover plate, the flatness of the filter membrane bag is improved, and the sealing effect of the filter membrane bag is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter filtration, and in particular relates to a high-flatness filter membrane package. Background Art

[0002] A filter membrane package consists of a stacked liquid inlet unit, a liquid flow unit, and other units. The outermost portion of the membrane package is typically provided with a plastic cover, or even no cover at all. For example, Chinese Patent Publication No. CN219764735U discloses a filter membrane package and filter comprising one or more stacked liquid inlet and filter units. During the connection process, the overall flatness of the membrane package is difficult to maintain, affecting the sealing performance of the filter membrane package. This may require the use of a clamp to apply greater compressive force, which in turn can cause deformation or even rupture of portions of the membrane package due to the excessive compressive force, significantly challenging the integrity of the membrane package. Utility Model Content

[0003] The utility model provides a high-flatness filter membrane package, which improves the flatness of the filter membrane package by arranging a composite cover plate, thereby ensuring the sealing effect of the filter membrane package.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-flatness filter membrane package comprises a membrane package body, wherein at least one side of the outside of the membrane package body is provided with a composite cover plate, wherein the composite cover plate comprises at least two layers of cover plate bodies, and adjacent cover plate bodies have different hardnesses. The periphery of the membrane package body and the composite cover plate is covered with a rubber coating. The membrane package body is provided with a liquid inlet, a reflux port and a liquid outlet. The cover plate body is provided with through holes corresponding to the liquid inlet, the reflux port and the liquid outlet, respectively. The inner side walls of the corresponding through holes of the cover plate body are provided with a common sealing ring. By providing cover plates of different hardness in the composite cover plate, the overall deformation and displacement of the composite cover plate after being compressed can be reduced, thereby ensuring the flatness of the filter membrane package, and a good soft support effect can be achieved, which better fits the membrane package body and cooperates with the sealing ring provided in the through hole of the composite cover plate to ensure the sealing of the filter membrane package, thereby avoiding deformation or even rupture of some areas due to excessive pressing force, which is conducive to maintaining the integrity of the filter membrane package.

[0006] Preferably, the cover plate body includes a first cover plate body, a second cover plate body, and a third cover plate body. The first cover plate body, the second cover plate body, and the third cover plate body are arranged from the outside to the inside outside the membrane package body, and the second cover plate body has a higher hardness than the first cover plate body and the second cover plate body. The second cover plate body has a relatively high hardness, which improves the overall strength and flatness of the composite cover plate. The first cover plate body and the third cover plate body located on both sides of the second cover plate body have a relatively low hardness. When in contact with the membrane package body, the fixture, or an adjacent filter membrane package, they can ensure sufficient pressing force while preventing deformation or even rupture of the membrane package body, thereby providing a certain soft support and cushioning effect.

[0007] Preferably, a groove is formed along at least a portion of the outer edge of the first cover plate in the thickness direction. The groove has a thickness of 20-70% of the thickness of the first cover plate and a width of 0.5-3 mm. During the encapsulation process, the material of the encapsulated component can enter the groove of the first cover plate, thereby forming a longitudinal compressive force in the thickness direction, effectively improving the sealing effect between the encapsulated component and the composite cover plate.

[0008] Preferably, a first protrusion is provided on the outer edge of the first cover plate, below and outside the groove. The width w of the first protrusion is 2-6 mm. The first protrusion increases the contact area between the rubber-coated component and the first cover plate, thereby improving the strength of the rubber coating. The protrusion also reduces the thickness of the rubber coating, thereby reducing shrinkage of the rubber coating material during the rubber coating process, thereby ensuring the flatness of the side surface of the rubber-coated component.

[0009] Preferably, the first cover plate body is a rectangular flat thin plate, and the first cover plate body is made of one of PP, PE, PVC, PET, PES, PVDF and PA, and the thickness of the first cover plate body is 1.5-5 mm.

[0010] Preferably, the elastic modulus of the second cover plate body is greater than or equal to 70 GPa, the thickness of the second cover plate body is 0.5-1.5 mm, and the second cover plate body is made of one of aluminum, iron, copper and stainless steel.

[0011] Preferably, the thickness of the third cover plate body is 0.2-1 mm, and the third cover plate body is made of one of PP, PE, PVDF, PES and PET.

[0012] Preferably, the diameter of the through-hole in the second cover body is larger than the diameter of the through-hole in the first cover body. After injection molding, the sealing ring is axially positioned and secured in the through-hole by virtue of the difference in through-hole diameters between the second and first cover bodies, further preventing the sealing ring from falling off or becoming loose.

[0013] Preferably, the sealing ring protrudes from the side of the composite cover plate facing the membrane package body; and / or the sealing ring protrudes from the side of the composite cover plate facing away from the membrane package body. The sealing ring protruding from the side of the composite cover plate facing the membrane package body can communicate with the corresponding liquid inlet, return port, and liquid outlet on the membrane package body, facilitating a seal formed by extrusion. The sealing ring protruding from the side of the composite cover plate facing away from the membrane package body can achieve sealed communication with the liquid inlet, return port, and liquid outlet of an adjacent filtration membrane package without the need for additional sealing gaskets, thereby reducing assembly difficulty.

[0014] Preferably, at least one cover plate body of the composite cover plate is fixedly connected to the sealing ring. During the installation of the filter membrane package, the sealing ring and the composite cover plate are stably positioned to prevent the sealing ring from falling off or loosening, which is conducive to ensuring the sealing effect of the sealing ring on the membrane package body.

[0015] Preferably, at least one side edge of the rubber-coated component is provided with a film package positioning groove, and the outer edge of at least one cover plate body of the composite cover plate is provided with a cover plate positioning groove corresponding to the film package positioning groove. The alignment of the cover plate positioning groove and the film package positioning groove ensures that the outer periphery of the composite cover plate and the rubber-coated component are aligned and positioned, thereby preventing the rubber-coated component from slipping relative to the outer periphery of the composite cover plate and ensuring connection stability.

[0016] The beneficial effects of the present invention are as follows: (1) the composite cover plate of the multi-layer cover plate body reduces the overall deformation and displacement after being compressed, thereby ensuring the integrity of the filter membrane package; (2) the connection strength and sealing effect between the composite cover plate and the rubber-coated component are improved, while the shrinkage of the rubber-coated material is reduced, thereby ensuring the flatness of the side of the rubber-coated component; (3) by arranging a sealing ring on the composite cover plate, the sealing effect of the liquid inlet, reflux port and liquid outlet is improved; (4) by the fixed connection between the sealing ring and the composite cover plate, the assembly steps are simplified and the assembly accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a cross-sectional view of the composite cover plate and the membrane package body of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the first cover body of the utility model;

[0020] Figure 4 It is a side view of the first cover body of the utility model;

[0021] Figure 5 This is a structural diagram of the second cover body of the utility model;

[0022] Figure 6 This is a schematic structural diagram of the third cover body of the utility model;

[0023] Figure 7 is a cross-sectional view of a composite cover plate according to Example 1 of the present utility model;

[0024] Figure 8 yes Figure 7 A partial enlarged view of point A in the middle;

[0025] Figure 9 is a cross-sectional view of a composite cover plate according to Example 2 of the present utility model;

[0026] Figure 10 yes Figure 9 A partial enlarged view of point B in the middle.

[0027] In the figure: composite cover plate 1, first cover plate body 11, first protrusion 11a, groove 11b, second cover plate body 12, third cover plate body 13, liquid outlet 2, reflux port 3, liquid inlet 4, rubber package 5, membrane package positioning groove 5a, sealing ring 6, membrane package body 7, through hole 8, cover plate positioning groove 9. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figure 1 、 Figure 2 In the embodiment shown, a high-flatness filtration membrane package includes a membrane package body 7, and a composite cover plate 1 is provided on at least one side of the outside of the membrane package body 7. The composite cover plate 1 in this embodiment includes three cover plate bodies, namely a first cover plate body 11, a second cover plate body 12 and a third cover plate body 13. The outer periphery of the membrane package body 7 and the composite cover plate 1 is covered with a rubber coating 5, and the rubber coating 5 is combined with the membrane package body 7 and the composite cover plate 1 to realize the overall sealing of the filtration membrane package. The membrane package body 7 is provided with a liquid inlet 4, a reflux port 3 and a liquid outlet 2, which are used to realize the inflow and outflow of the feed liquid and the smooth discharge of the filtered permeate from the filtration membrane package. The first cover plate body 11, the second cover plate body 12 and the third cover plate body 13 are all provided with through holes 8 corresponding to the liquid inlet 4, the reflux port 3 and the liquid outlet 2, respectively, and the inner side walls of the corresponding through holes 8 of the three cover plate bodies are provided with a common sealing ring 6. When the composite cover plate 1 and the membrane package body 7 are assembled, the center of the sealing ring 6 is connected to the corresponding liquid inlet 4, reflux port 3, or liquid outlet 2, thereby forming a liquid inlet channel, a reflux channel, and a liquid outlet channel. At the same time, the sealing ring 6 seals the edges of the liquid inlet 4, reflux port 3, or liquid outlet 2, thereby preventing leakage of the feed liquid and permeate, and improving the overall sealing effect of the filter membrane package.

[0031] like Figure 2As shown, the first cover plate 11, the second cover plate 12 and the third cover plate 13 are distributed from outside to inside on the outside of the membrane package body 7, wherein the hardness of the second cover plate 12 is higher than that of the first cover plate 11 and the second cover plate 12. Figure 3 As shown, the first cover plate body 11 is a rectangular flat thin plate, and the first cover plate body 11 is made of one of PP, PE, PVC, PET, PES, PVDF and PA. Figure 4 As shown, the thickness of the first cover body 11 is 1.5-5 mm. A groove 11b is provided along at least part of the outer edge of the first cover body 11 in the thickness direction. The thickness of the groove 11b is 20-70% of the thickness of the first cover body 11, and the width of the groove 11b is 0.5-3 mm. The groove 11b is distributed along the outer edge of the first cover body 11. During the overmolding process of the overmolding member 5, the overmolding material can enter the groove 11b, thereby forming a longitudinal compressive force in the thickness direction, thereby improving the sealing effect between the overmolding member 5 and the membrane package body 7.

[0032] like Figure 3 、 Figure 4 As shown, a first protrusion 11a is provided on the outer edge of the first cover body 11, below and outside the groove 11b. The width w of the first protrusion 11a is 2-6 mm. The first protrusion 11a increases the contact area between the rubber-coated component 5 and the first cover body 11, thereby further enhancing the connection strength between the rubber-coated component 5 and the first cover body 11. Furthermore, the first protrusion 11a can reduce the thickness of the rubber-coated component 5 at the rubber-coated portion, thereby reducing shrinkage of the rubber-coated component during the rubber-coating process and ensuring the smoothness of the outer surface of the rubber-coated component 5.

[0033] like Figure 5 As shown, the elastic modulus of the second cover plate body 12 is greater than or equal to 70 GPa, the thickness of the second cover plate body 12 is 0.5-1.5 mm, and the second cover plate body 12 is made of one of aluminum, iron, copper, and stainless steel. The second cover plate body 12 has high hardness and strength, thereby improving the overall strength and flatness of the composite cover plate 1. Under the compression force of the rubberized cover 5 and the clamp, the maximum displacement of each point on the composite cover plate 1 in the thickness direction without force is less than 0.5 mm.

[0034] Combine Figure 6As shown, the third cover plate body 13 is made of one of PP, PE, PVDF, PES and PET, and the thickness of the third cover plate body 13 is 0.2-1mm. The third cover plate body 13 is located on the side of the second cover plate body 12 close to the membrane package body 7, which can effectively prevent the filtered feed liquid from directly contacting the second cover plate body 12. Since the material of the third cover plate is made of absolutely biosafe material, it can effectively prevent the feed liquid from chemically reacting with the material of the second cover plate body 12 or the precipitation of undesirable substances, and can be applied to the existing feed liquid to the greatest extent. The material of the third cover plate body 13 is closer to the physical and chemical properties of the membrane package body 7. It is arranged between the membrane package body 7 and the second cover plate body 12, and the connection performance is more reliable and the connection strength is higher. In addition, the third cover plate body 13 is made of a material with moderate hardness and softness, which can not only ensure sufficient pressing force, but also provide a soft support to prevent the membrane package body 7 from deformation or even rupture.

[0035] like Figure 1 As shown, the two opposite side edges of the rubber package 5 are provided with film package positioning grooves 5a to facilitate positioning and matching with the external clamp. Figure 3 、 Figure 5 、 Figure 6 As shown, the outer edges of the first cover plate body 11, the second cover plate body 12 and the third cover plate body 13 are all provided with cover plate positioning grooves 9 corresponding to the membrane package positioning grooves 5a, so that the outer periphery of the composite cover plate 1 and the rubber-coated part 5 form a stable and reliable positioning fit, avoiding slippage between the two and ensuring sealing performance.

[0036] like Figure 2 、 Figure 7 、 Figure 8 As shown, the sealing ring 6 protrudes from the side of the composite cover plate 1 facing the membrane package body 7. The protruding sealing ring 6 can communicate with the corresponding liquid inlet 4, reflux port 3 and liquid outlet 2 on the membrane package body 7 and form a seal by extrusion. When multiple filter membrane packages are stacked and adjacent filter membrane packages are docked with each other, the liquid inlet 4, reflux port 3 and liquid outlet 2 are difficult to completely seal. In the prior art, additional sealing gaskets are often required. However, the sealing ring 6 in the present application also protrudes from the side of the composite cover plate 1 away from the membrane package body 7. It can achieve sealed communication with adjacent filter membrane packages without the need for additional sealing gaskets, thereby reducing the difficulty of assembly and improving the sealing effect when multiple filter membrane packages are stacked.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that the sealing ring 6 is fixedly connected to at least one cover plate body in the composite cover plate 1 by injection molding, and the composite cover plate 1 is extruded and shaped by a mold and then injection molded, and the sealing ring 6 is formed after curing, thereby simplifying the installation time and difficulty of the sealing ring 6 and the composite cover plate 1, and at the same time, it can also improve the position accuracy of the sealing ring 6, thereby ensuring the sealing performance between the composite cover plate 1 and the membrane package main body 7.

[0039] like Figure 9 、 Figure 10 As shown, the diameter of the through hole 8 on the second cover body 12 is larger than the diameter of the through hole 8 on the first cover body 11, forming an inward-contracted stepped hole as a whole. The inner wall of the through hole 8 forms an axial positioning for the sealing ring 6. After injection molding, the position of the sealing ring 6 in the through hole 8 is fixed to prevent the sealing ring 6 from falling off or loosening.

[0040] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, based on the idea of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A high-flatness filtration membrane package, comprising a membrane package body (7), characterized in that: A composite cover plate (1) is provided on at least one side of the outside of the membrane package body (7), and the composite cover plate (1) includes at least two cover plate bodies, and the hardness of at least one cover plate body is different from that of the other cover plate bodies. The periphery of the membrane package body (7) and the composite cover plate (1) is covered with a rubber coating (5). The membrane package body (7) is provided with a liquid inlet (4), a reflux port (3) and a liquid outlet (2). The cover plate body is provided with through holes (8) corresponding to the liquid inlet (4), the reflux port (3) and the liquid outlet (2), respectively. The inner side walls of the corresponding through holes (8) of the cover plate body are provided with a common sealing ring (6).

2. A high-flatness filtration membrane package according to claim 1, characterized in that: The cover plate body comprises a first cover plate body (11), a second cover plate body (12) and a third cover plate body (13); the first cover plate body (11), the second cover plate body (12) and the third cover plate body (13) are distributed from the outside to the inside outside the membrane package body (7); the hardness of the second cover plate body (12) is higher than that of the first cover plate body (11) and the second cover plate body (12).

3. A high-flatness filtration membrane package according to claim 2, characterized in that: At least part of the outer edge of the first cover plate body (11) in the thickness direction is provided with a groove (11b), the thickness of the groove (11b) is 20-70% of the thickness of the first cover plate body (11), and the width of the groove (11b) is 0.5-3 mm.

4. A high-flatness filtration membrane package according to claim 3, characterized in that: The outer edge of the first cover plate body (11) is provided with a first protrusion (11a) below and outside the groove (11b), and the width w of the first protrusion (11a) is 2-6 mm.

5. The high-flatness filtration membrane package according to claim 2, characterized in that: The first cover plate body (11) is a rectangular flat thin plate. The first cover plate body (11) is made of one of PP, PE, PVC, PET, PES, PVDF and PA. The thickness of the first cover plate body (11) is 1.5-5 mm.

6. A high-flatness filtration membrane package according to claim 2, characterized in that: The elastic modulus of the second cover plate body (12) is greater than or equal to 70 GPa, the thickness of the second cover plate body (12) is 0.5-1.5 mm, and the second cover plate body (12) is made of one of aluminum, iron, copper and stainless steel.

7. The high-flatness filtration membrane package according to claim 2, characterized in that: The thickness of the third cover plate body (13) is 0.2-1 mm, and the third cover plate body (13) is made of one of PP, PE, PVDF, PES and PET.

8. The high-flatness filtration membrane package according to claim 2, characterized in that: The diameter of the through hole (8) on the second cover plate body (12) is greater than the diameter of the through hole (8) on the first cover plate body (11).

9. A high-flatness filtration membrane package according to any one of claims 1 to 8, characterized in that: The sealing ring (6) protrudes from the side of the composite cover plate (1) facing the membrane package body (7); and / or, the sealing ring (6) protrudes from the side of the composite cover plate (1) away from the membrane package body (7).

10. A high-flatness filtration membrane package according to any one of claims 1 to 8, characterized in that: At least one cover plate body in the composite cover plate (1) is fixedly connected to the sealing ring (6).

11. A high-flatness filtration membrane package according to any one of claims 1 to 8, characterized in that: At least one side edge of the rubber-coated part (5) is provided with a membrane package positioning groove (5a), and the outer edge of at least one cover plate body in the composite cover plate (1) is provided with a cover plate positioning groove (9) corresponding to the membrane package positioning groove (5a).

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