Novel filtering membrane bag with sealing structure

Abstract

The utility model discloses a novel filtering membrane bag with a sealing structure, and relates to the field of filtering equipment. The filtering membrane bag with the novel sealing structure comprises a liquid outlet unit, a liquid inlet unit, a filtering membrane layer and a rubber coating piece, the liquid inlet unit comprises a liquid inlet screen and a liquid inlet sealing piece. According to the utility model, the first liquid inlet sealing part and the second liquid inlet sealing part are protruded and have height difference between the liquid inlet unit and the filter membrane layer, so that when the liquid inlet unit is extruded, clamped and sealed, the second liquid inlet sealing part is firstly extruded and embedded into the filter membrane layer, and the second liquid inlet sealing part is extruded and embedded into the filter membrane layer; the first liquid inlet sealing part can prevent the second liquid inlet sealing part from locally extruding the filtering membrane layer, promote transition of local stress and buffer stress of the filtering membrane layer, so that the liquid inlet screen is prevented from being embedded into the filtering membrane layer, deformation and even damage of the filtering membrane layer are avoided, the basic shape of the filtering membrane layer is maintained, and the service life of the filtering membrane layer is prolonged. Therefore, the liquid inlet capacity of the filtering membrane bag is guaranteed, and the protruding design of the filtering membrane bag is beneficial to improving the sealing performance between the liquid inlet unit and the filtering membrane layer.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a filtering membrane package with a novel sealing structure. Background Art

[0002] The pore structure inside the filter membrane can selectively pass small molecules in the material and intercept macromolecules. The technology of separation, purification and refinement through the filter membrane is generally called membrane separation technology. In the traditional dead-end filtration method, since the filtration direction is consistent with the flow direction of the material to be filtered, a large number of intercepted macromolecules are enriched, forming a gel layer or filter cake layer, which affects the filtration effect. In the tangential flow filtration method, the filtration direction is perpendicular to the flow direction of the material to be filtered. The macromolecules on the surface are continuously washed away by the material as it flows, avoiding the formation of a filter cake layer or gel layer on the surface of the filter membrane, thereby improving the service life and filtration efficiency of the filter membrane.

[0003] As a common tangential flow filtration component, the filter membrane package is composed of a stack of liquid outlet units, on which corresponding liquid inlets, liquid outlets and reflux ports are arranged. By sealing the specific liquid inlets, liquid outlets and reflux ports, a tangential flow filtration channel is formed. After the material enters the filter membrane package through the liquid inlet, it is filtered under the action of the internal filter membrane layer. The permeate obtained by filtration is discharged through the liquid outlet, and the remaining material is discharged from the filter membrane package along the reflux port with the gas in it.

[0004] At present, the inlet unit and the outlet unit in the filter membrane package are both provided with sealing parts for sealing, and the sealing parts are protruding relative to the inlet unit and the outlet unit to achieve extrusion sealing of the filter membrane layers on both sides. However, the extrusion sealing method requires the connection of the sealing parts through the clamping force during the assembly stage, and the filter membrane layer is prone to damage; because the inlet unit has a rigid guide screen, when the clamping force is too large, the guide screen is easy to embed into the filter membrane layer, thereby causing the filter membrane layer to deform or even break, resulting in a reduction in the filtration capacity of the filter membrane package. Utility Model Content

[0005] The technical problem that the utility model is to solve or at least partially solve is that in the related art, the connection of the sealing part needs to be connected by clamping force during the assembly stage through the extrusion sealing method, and the filter membrane layer is prone to damage; since the liquid inlet unit has a rigid guide screen, when the clamping force is too large, the guide screen is easy to embed into the filter membrane layer, which causes the filter membrane layer to deform or even damage, resulting in a decrease in the filtration capacity of the filter membrane package.

[0006] The utility model provides a filter membrane package with a novel sealing structure, comprising:

[0007] at least one liquid outlet unit, including a liquid outlet screen and a liquid outlet seal;

[0008] At least one liquid inlet unit, the liquid inlet unit and the liquid outlet unit are arranged at intervals; the liquid inlet unit comprises a liquid inlet screen and a liquid inlet seal;

[0009] A filter membrane layer is correspondingly arranged between the liquid outlet unit and the liquid inlet unit;

[0010] and a rubber-coated part, wherein the rubber-coated part is wrapped and sealed around the outer periphery of the liquid outlet unit, the liquid inlet unit and the filter membrane layer;

[0011] The liquid outlet unit, the liquid inlet unit and the filter membrane layer are all provided with corresponding liquid inlets, reflux ports and liquid outlets; the liquid outlet seals are respectively provided at the liquid inlet holes and reflux holes of the liquid outlet screen, and the liquid inlet seals are provided at the liquid outlet holes of the liquid inlet screen;

[0012] The liquid inlet sealing member comprises a first liquid inlet sealing portion and a second liquid inlet sealing portion, at least a portion of the first liquid inlet sealing portion is arranged on the outer periphery of the liquid outlet through hole of the liquid inlet screen, the second liquid inlet sealing portion is arranged on the inner side of the first liquid inlet sealing portion, at least a portion of the second liquid inlet sealing portion is arranged on the inner side of the liquid outlet through hole of the liquid inlet screen, and the inner side wall of the second liquid inlet sealing portion forms a liquid outlet on the liquid inlet unit;

[0013] The second liquid inlet sealing portion is protrudingly arranged on a side of the first liquid inlet sealing portion away from the liquid inlet screen.

[0014] Optionally, a height of the first liquid inlet sealing portion protruding from a side wall surface of the liquid inlet screen is set to 0.2-2.0 mm.

[0015] Optionally, a height of the second liquid inlet sealing portion protruding from a side wall surface of the first liquid inlet sealing portion is set to 0.1-0.8 mm.

[0016] Optionally, the liquid inlet sealing member is provided with a first sealing end surface and a second sealing end surface, and the first liquid inlet sealing portion and the second liquid inlet sealing portion are arranged on the first sealing end surface and / or the second sealing end surface; and / or

[0017] The cross-sectional shape of the first liquid inlet sealing portion and the cross-sectional shape of the second liquid inlet sealing portion are set to be the same.

[0018] Optionally, an extension length of the first liquid inlet sealing portion along the first sealing end surface and / or the second sealing end surface is set to 5-15 mm, and an extension length of the second liquid inlet sealing portion along the first sealing end surface and / or the second sealing end surface is set to 2-8 mm.

[0019] Optionally, the liquid outlet seal comprises a first filter seal portion and a second filter seal portion, at least part of the first filter seal portion is arranged on the outer periphery of the liquid inlet through hole and the reflux through hole of the liquid outlet screen, the second filter seal portion is arranged on the inner side of the first filter seal portion, at least part of the second filter seal portion is arranged on the inner side of the liquid inlet through hole and the reflux through hole of the liquid outlet screen, and the inner side wall of the correspondingly arranged second filter seal portion forms the liquid inlet and reflux opening on the liquid inlet unit;

[0020] The second filter sealing portion is protrudingly arranged on a side of the first filter sealing portion away from the liquid outlet screen, and the second filter sealing portion is protrudingly arranged on a side wall surface of the first filter sealing portion away from the liquid outlet screen.

[0021] Optionally, the height of the first filter sealing portion protruding from the side wall surface of the liquid outlet screen is set to 0.2-2.0 mm, and the height of the second filter sealing portion protruding from the side wall surface of the first filter sealing portion is set to 0.1-0.8 mm.

[0022] Optionally, the liquid outlet seal is provided with a third sealing end surface and a fourth sealing end surface, and the first filter seal portion and the second filter seal portion are arranged on the third sealing end surface and / or the fourth sealing end surface; and / or

[0023] The cross-sectional shape of the first filter sealing portion and the cross-sectional shape of the second filter sealing portion are set to be the same.

[0024] Optionally, the filter membrane package further comprises a sealing ring, and the sealing ring and the liquid outlet unit, the liquid inlet unit and the periphery of the filter membrane layer are spaced apart by a first distance, the first distance being set to 1-10 mm, and at least part of the rubber package abuts and seals against the outside of the sealing ring.

[0025] Optionally, the height of the sealing side of the first liquid inlet sealing portion is greater than or equal to the height of the sealing side of the sealing ring; and / or

[0026] At least a portion of the second liquid inlet sealing portion (222) and the sealing ring (6) are arranged to overlap.

[0027] Optionally, the sealing ring and the first liquid inlet sealing portion are integrally formed; or

[0028] The sealing ring and the second liquid inlet sealing portion are integrally formed; or

[0029] The first liquid inlet sealing portion and the second liquid inlet sealing portion are integrally formed; or

[0030] The sealing ring, the first liquid inlet sealing portion and the second liquid inlet sealing portion are integrally formed.

[0031] The technical solution provided by the utility model has the following advantages:

[0032] 1. The filter membrane package of the novel sealing structure provided by the utility model has a protruding and height difference design between the first liquid inlet sealing part and the second liquid inlet sealing part between the liquid inlet unit and the filter membrane layer, so that when the liquid inlet unit is squeezed and clamped for sealing, the second liquid inlet sealing part is first squeezed and embedded into the filter membrane layer. The first liquid inlet sealing part can prevent the second liquid inlet sealing part from locally squeezing the filter membrane layer, promote the transition of local stress, and buffer the force on the filter membrane layer to avoid the liquid inlet screen from being embedded in the filter membrane layer, avoid deformation or even damage of the filter membrane layer, and enable the filter membrane layer to maintain its basic shape, thereby ensuring the liquid inlet capacity of the filter membrane package, and its protruding design is conducive to improving the sealing between the liquid inlet unit and the filter membrane layer.

[0033] 2. The filter membrane package of the new sealing structure provided by the utility model has a protruding and height difference design between the first filter sealing part and the second filter sealing part between the liquid outlet unit and the filter membrane layer, so that when the liquid outlet unit is squeezed and clamped for sealing, the second filter sealing part is first squeezed and embedded into the filter membrane layer, and the first filter sealing part is used to promote the transition of local stress between the filter membrane layer and the liquid outlet seal to buffer the local contact force of the filter membrane layer, so as to avoid the liquid outlet screen from being embedded in the filter membrane layer, avoid deformation or even damage of the filter membrane layer, and enable the filter membrane layer to maintain its basic shape, thereby ensuring the filtering capacity of the filter membrane package, and its protruding design is conducive to improving the sealing between the liquid outlet unit and the filter membrane layer.

[0034] 3. The filter membrane package of the new sealing structure provided by the utility model also includes a sealing ring, which is spaced apart from the liquid outlet unit, the liquid inlet unit and the periphery of the filter membrane layer, and at least part of the rubber-coated part is sealed against the inner side of the sealing ring and between the stacked liquid outlet unit, the liquid inlet unit and the periphery of the filter membrane layer. The sealing ring can improve the sealing performance of the peripheral area of ​​the screen during the mutual squeezing and sealing between the liquid inlet unit and the liquid passing unit; the sealing ring is spaced apart from the liquid outlet unit and the liquid inlet unit, so that during the molding process of the filter membrane package, the rubber-coated part can fully penetrate into the liquid outlet screen of the liquid outlet unit and the liquid inlet screen of the liquid inlet unit, thereby improving the overall structural stability and sealing performance of the filter membrane package. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 creative work.

[0036] Figure 1 A schematic diagram of the structure of a filter membrane package with a novel sealing structure provided by the utility model;

[0037] Figure 2 A structural schematic diagram of one implementation mode of a liquid inlet unit in a filter membrane package of a novel sealing structure provided by the utility model;

[0038] Figure 3 A partial enlarged view of one implementation mode of the liquid inlet unit in the filter membrane package of the novel sealing structure provided by the utility model;

[0039] Figure 4 A schematic diagram of the structure of the liquid outlet unit in the filter membrane package of the novel sealing structure provided by the utility model;

[0040] Figure 5 A partial enlarged view of the liquid outlet unit in the filter membrane package of the novel sealing structure provided by the utility model;

[0041] Figure 6 A structural schematic diagram of a second implementation mode of a liquid inlet unit in a filter membrane package with a novel sealing structure provided by the utility model;

[0042] Figure 7 A structural schematic diagram of a third implementation mode of a liquid inlet unit in a filter membrane package with a novel sealing structure provided by the utility model;

[0043] Figure 8 A structural schematic diagram of a fourth implementation mode of a liquid inlet unit in a filter membrane package of a novel sealing structure provided by the utility model;

[0044] Fig. 9 A partial enlarged view of the fourth implementation mode of the liquid inlet unit in the filter membrane package of the new sealing structure provided by the utility model;

[0045] Fig.10 A structural schematic diagram of a fourth implementation mode of a liquid outlet unit in a filter membrane package of a novel sealing structure provided by the utility model;

[0046] Fig.11 A partial enlarged view of the fourth implementation mode of the liquid outlet unit in the filter membrane package of the new sealing structure provided by the utility model;

[0047] Fig.12 A schematic cross-sectional view of a filter membrane package of a novel sealing structure provided by the utility model along the liquid outlet;

[0048] Fig.13 for Fig.12 A partial enlarged view of

[0049] Fig.14 A schematic cross-sectional view of a filter membrane package of a novel sealing structure provided by the utility model along the liquid inlet;

[0050] Description of reference numerals:

[0051] 11-liquid outlet screen; 12-liquid outlet seal; 121-first filter seal portion; 122-second filter seal portion;

[0052] 21-liquid inlet screen; 22-liquid inlet sealing member; 221-first liquid inlet sealing portion; 222-second liquid inlet sealing portion;

[0053] 31-liquid inlet; 32-reflux outlet; 33-liquid outlet;

[0054] 4-filtration membrane layer; 5-rubber package; 6-sealing ring. DETAILED DESCRIPTION

[0055] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "connected", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] 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.

[0059] Example 1

[0060] This embodiment provides a novel sealing structure of the filtration membrane package, which is suitable for the filtration, permeation, concentration and other treatments of biological solutions or pharmaceutical solutions, see Figures 1 to 5 The filter membrane package with a new sealing structure includes a liquid outlet unit, a liquid inlet unit, a filter membrane layer 4 and a rubber coating 5. The liquid inlet unit and the liquid outlet unit are arranged at intervals; the filter membrane layer 4 is correspondingly arranged between the liquid outlet unit and the liquid inlet unit; the rubber coating 5 is wrapped and sealed around the liquid outlet unit, the liquid inlet unit and the outer periphery of the filter membrane layer 4.

[0061] Among them, the liquid outlet unit, the liquid inlet unit and the filter membrane layer 4 are all provided with a liquid inlet 31, a reflux port 32 and a liquid outlet 33 at corresponding positions; in this embodiment, there is one liquid inlet 31 and one reflux port 32 respectively, and two liquid outlets 33 are provided.

[0062] In this embodiment, see Figure 2 and Figure 6 The liquid inlet unit includes a liquid inlet screen 21 and a liquid inlet seal 22. The liquid inlet seal 22 is arranged around the liquid outlet 33 of the liquid inlet screen 21. Figure 3 , Fig.12 and Fig.13 The liquid inlet seal 22 includes a liquid inlet seal body and a first liquid inlet seal portion 221 and a second liquid inlet seal portion 222 constructed on the sealing end surface of the liquid inlet seal body. The second liquid inlet seal portion 222 is arranged on a side of the first liquid inlet seal portion 221 away from the liquid inlet seal body; the first liquid inlet seal portion 221 is arranged to protrude from the sealing end surface of the liquid inlet seal body, and the second liquid inlet seal portion 222 is arranged to protrude from the wall surface of the first liquid inlet seal portion 221. The first liquid inlet seal portion 221 is arranged to be a hollow cylindrical structure.

[0063] See also Fig.12 and Fig.13 , the liquid inlet seal 22 is arranged at the liquid outlet through hole of the liquid inlet screen 21; the liquid outlet through hole is a through hole structure coaxially aligned with the liquid outlet 33 on the liquid inlet screen 21. Among them, the first liquid inlet seal 221 is arranged on the outer periphery of the liquid outlet through hole of the liquid inlet screen 21, the second liquid inlet seal 222 is arranged on the inner side of the first liquid inlet seal 221, and the inner side wall of the second liquid inlet seal 222 forms the liquid outlet 33 on the liquid inlet unit. Of course, in some embodiments, a portion of the first liquid inlet seal 221 can be extended toward the inner wall of the liquid outlet through hole of the liquid inlet screen 21, and welded with the second liquid inlet seal 222, and the second liquid inlet seal 222 is arranged on the inner side of the liquid outlet through hole of the liquid inlet screen 21. Of course, in some embodiments, a portion of the second liquid inlet seal 222 can be extended toward the outer edge side of the liquid outlet through hole of the liquid inlet screen 21.

[0064] As an exemplary embodiment, the height of the first liquid inlet sealing portion 221 protruding from the sealing end face of the liquid inlet sealing body is set to 0.2-2.0mm, and the height of the second liquid inlet sealing portion 222 protruding from the wall surface of the first liquid inlet sealing portion 221 is set to 0.1-0.8mm. It should be noted that when the height difference between the two is less than 0.1mm, the first liquid inlet sealing portion 221 and the second liquid inlet sealing portion 222 both excessively squeeze the filter membrane layer 4, resulting in excessive pressure on the filter membrane layer 4 or the first liquid inlet sealing portion 221 and the second liquid inlet sealing portion 222 being unable to effectively squeeze the filter membrane layer 4, affecting the sealing effect of the filter membrane package; when the height difference between the two is greater than 0.8mm, when the first liquid inlet sealing portion 221 squeezes the filter membrane layer 4, the second liquid inlet sealing portion 222 is unable to effectively squeeze the filter membrane layer 4, resulting in the filter membrane layer 4 being on the filter membrane layer 4. The adjacent area squeezed by the second liquid inlet sealing part 222 cannot be effectively pressurized, so that the filter membrane is locally over-pressed and damaged; when the height difference between the two is 0.1-0.8mm, when the second liquid inlet sealing part 222 squeezes the filter membrane layer 4, the filter membrane layer 4 corresponding to the outer peripheral area of ​​the second liquid inlet sealing part 222 is squeezed by the first liquid inlet sealing part 221, and deformed, so that the local deformation of the filter membrane layer 4 is buffered, while improving the sealing between the liquid inlet unit and the liquid outlet unit, it also protects the integrity of the filter membrane layer 4.

[0065] As an exemplary embodiment, the extension length of the first liquid inlet sealing part 221 along the sealing end surface of the liquid inlet sealing body is set to 5-15mm. It should be noted that when the extension length of the first liquid inlet sealing part 221 is less than 5mm, the interval between the first liquid inlet sealing part 221 and the second liquid inlet sealing part 222 is small, and the local pressure of the filter membrane layer 4 cannot be buffered, and the local pressure of the filter membrane layer 4 cannot be effectively buffered; when the extension length of the first liquid inlet sealing part 221 is greater than 15mm, the materials at the adjacent liquid inlet 31 and the reflux port 32 are easily guided to flow to the edge of the screen, affecting the smoothness of the filtration; when the extension length of the first liquid inlet sealing part 221 is 5-15mm, the first liquid inlet sealing part 221 can effectively buffer the local pressure of the filter membrane layer 4, and does not affect the flow direction of the material.

[0066] As an exemplary embodiment, the extension length of the second liquid inlet sealing portion 222 along the sealing end surface of the liquid inlet sealing body is set to 2-8 mm. It should be noted that the extension length of the second liquid inlet sealing portion 222 is not less than 2 mm. At this time, the overall length of the second liquid inlet sealing portion 222 is small, and the squeezing and sealing effect on the filter membrane layer 4 is weak. When the extension length of the second liquid inlet sealing portion 222 is greater than 8 mm, the second liquid inlet sealing portion 222 can effectively squeeze the filter membrane layer 4 to provide a sealing effect, but it is easy to over-squeeze the filter membrane layer 4, resulting in damage to the filter membrane layer 4.

[0067] See also Fig.12The liquid inlet seal 22 is provided with a first sealing end surface and a second sealing end surface. In a specific embodiment, the first liquid inlet seal portion 221 and the second liquid inlet seal portion 222 are arranged on the second sealing end surface; in another embodiment, the first liquid inlet seal portion 221 and the second liquid inlet seal portion 222 are both arranged on the first sealing end surface and the second sealing end surface; of course, the first liquid inlet seal portion 221 and the second liquid inlet seal portion 222 are arranged on the first sealing end surface. Among them, the first sealing end surface is arranged Fig.12 The upper end face of the liquid inlet seal 22 is shown, and the second sealing end face is set as Fig.12 The lower end face of the liquid inlet seal 22 is shown.

[0068] In some embodiments, the cross-sectional shape of the first liquid inlet sealing portion 221 and the cross-sectional shape of the second liquid inlet sealing portion 222 are set to be the same; the cross-sectional shape of any sealing portion is set to be one of a circle, a triangle, a rectangle and a trapezoid. It should be noted that due to the actual production process, the appearance of the first liquid inlet sealing portion 221 and the second liquid inlet sealing portion 222 may not be a completely regular geometric shape.

[0069] The filter membrane package of the novel sealing structure provided in the present embodiment has a protruding and height difference design between the first liquid inlet sealing part 221 and the second liquid inlet sealing part 222 between the liquid inlet unit and the filter membrane layer 4, so that when the liquid inlet unit is squeezed and clamped for sealing, the second liquid inlet sealing part 222 is first squeezed and embedded into the filter membrane layer. The first liquid inlet sealing part 221 can prevent the second liquid inlet sealing part 222 from locally squeezing the filter membrane layer, promote the transition of local stress, and buffer the force on the filter membrane layer to prevent the liquid inlet screen 21 from being embedded in the filter membrane layer, avoid deformation or even damage of the filter membrane layer, and enable the filter membrane layer to maintain its basic shape, thereby ensuring the liquid inlet capacity of the filter membrane package, and its protruding design is conducive to improving the sealing between the liquid inlet unit and the filter membrane layer 4.

[0070] See also Figure 4 and Figure 5 The liquid outlet unit includes a liquid outlet screen 11 and a liquid outlet seal 12. The liquid outlet seal 12 can form a contact protection between the liquid outlet screen 11 and the filter membrane layer 4. The liquid outlet seal 12 is respectively arranged at the liquid inlet through hole and the reflux through hole of the liquid outlet screen 11. The liquid inlet through hole can be a through hole structure coaxially aligned with the liquid inlet port 31 on the liquid outlet screen 11, and the reflux through hole is a through hole structure coaxially aligned with the reflux port 32 on the liquid outlet screen 11.

[0071] See also Fig.14The liquid outlet seal 12 includes a filter seal body and a first filter seal part 121 and a second filter seal part 122 constructed on the sealing end surface of the filter seal body, and the second filter seal part 122 is arranged on the side of the first filter seal part 121 away from the filter seal body; the first filter seal part 121 is protruding from the sealing end surface of the filter seal body, and the second filter seal part 122 is protruding from the wall surface of the first filter seal part 121; the liquid outlet seal 12 includes a filter seal body and a first filter seal part 121 and a second filter seal part 122 constructed on the sealing end surface of the filter seal body, and the second filter seal part 122 is arranged on the side of the first filter seal part 121 away from the filter seal body; the first filter seal part 121 is protruding from the sealing end surface of the filter seal body, and the second filter seal part 122 is protruding from the wall surface of the first filter seal part 121. The first filter seal part 121 is set as a hollow cylindrical structure.

[0072] The first filter sealing portion 121 is arranged on the outer periphery of the liquid inlet hole of the liquid outlet screen 11, the second filter sealing portion 122 is arranged on the inner side of the first filter sealing portion 121, the second filter sealing portion 122 is arranged on the inner side of the liquid inlet hole and the reflux hole of the liquid outlet screen 11, and the inner side wall of the second filter sealing portion 122 forms the liquid inlet port 31 on the liquid inlet unit.

[0073] In another embodiment, a first filter sealing portion 121 may be provided at the periphery of the reflux flow hole, the first filter sealing portion 121 is provided at the periphery of the reflux flow hole of the liquid outlet screen 11, the second filter sealing portion 122 is provided on the inner side of the first filter sealing portion 121, the second filter sealing portion 122 is provided on the inner side of the reflux flow hole of the liquid outlet screen 11, and the inner side wall of the second filter sealing portion 122 forms a reflux port 32 on the liquid inlet unit.

[0074] The filter membrane package with a novel sealing structure provided in the present embodiment has a protruding and height difference design between the first filter seal part 121 and the second filter seal part 122, so that when the liquid outlet unit is squeezed and clamped for sealing, the second filter seal part 122 is first squeezed and embedded into the filter membrane layer 4. The first filter seal part 121 can prevent the second filter seal part 122 from locally squeezing the filter membrane layer 4, promote the transition of local stress, and buffer the force on the filter membrane layer 4 to prevent the liquid outlet screen 11 from being easily embedded in the filter membrane layer 4, avoid deformation or even damage of the filter membrane layer 4, and enable the filter membrane layer 4 to maintain its basic shape, thereby ensuring the filtering capacity of the filter membrane package, and its protruding design is conducive to improving the sealing between the liquid inlet unit and the liquid outlet unit.

[0075] As an exemplary embodiment, the height of the first filter seal part 121 protruding from the sealing end surface of the filter seal body is set to 0.2-2.0 mm, and the height of the second filter seal part 122 protruding from the wall surface of the first filter seal part 121 is set to 0.1-0.8 mm.

[0076] See also Fig.14 The liquid outlet seal 12 is provided with a third sealing end face and a fourth sealing end face. In a specific embodiment, the first filter seal portion 121 and the second filter seal portion 122 are arranged on the third sealing end face; in another embodiment, the first filter seal portion 121 and the second filter seal portion 122 are arranged on the fourth sealing end face; preferably, the first filter seal portion 121 and the second filter seal portion 122 are arranged on the third sealing end face and the fourth sealing end face respectively. The third sealing end face is provided as Fig.14 The upper end face of the liquid outlet seal 12 is shown, and the fourth sealing end face is set as Fig.14 The lower end surface of the liquid outlet seal 12 is shown.

[0077] In some embodiments, the cross-sectional shape of the first filter seal portion 121 and the cross-sectional shape of the second filter seal portion 122 are set to be the same; the cross-sectional shape of any seal portion is set to one of a circle, a triangle, a rectangle and a trapezoid.

[0078] The filter membrane package of the novel sealing structure provided by the utility model has a protruding and height difference design between the first filter sealing part 121 and the second filter sealing part 122 between the liquid outlet unit and the filter membrane layer 4, so that when the liquid outlet unit is squeezed and clamped for sealing, the second filter sealing part 122 is first squeezed and embedded into the filter membrane layer 4, and the first filter sealing part 121 is used to promote the transition of local stress between the filter membrane layer 4 and the liquid outlet seal 12 to buffer the local contact force of the filter membrane layer 4, so as to avoid the liquid outlet screen 11 from being embedded into the filter membrane layer 4, avoid deformation or even damage of the filter membrane layer 4, and enable the filter membrane layer 4 to maintain its basic shape, thereby ensuring the filtering capacity of the filter membrane package, and its protruding design is conducive to improving the sealing between the liquid outlet unit and the filter membrane layer 4.

[0079] In some embodiments, the liquid outlet screen 11 and the filter membrane layer 4 are connected and sealed by a liquid outlet seal 12, and the connection and sealing method is set to be any one of hot melt welding, ultrasonic welding, eddy current welding and glue bonding.

[0080] As a preferred solution, see Figure 2 and Figure 4 The filter membrane package further comprises a sealing ring 6, which is spaced apart from the liquid outlet unit, the liquid inlet unit and the outer periphery of the filter membrane layer 4, and at least part of the rubber package 5 is sealed against the outer side of the sealing ring 6. In this embodiment, the sealing ring 6 is an elastic sealing ring.

[0081] The filter membrane package with a new sealing structure provided in the present embodiment has a sealing ring 6 which can improve the sealing performance of the peripheral area of ​​the screen during the mutual squeezing and sealing process between the liquid inlet unit and the liquid passing unit; the sealing ring 6 is spaced apart from the liquid outlet unit and the liquid inlet unit, so that during the molding process of the filter membrane package, the rubber coating 5 can fully penetrate into the liquid outlet screen 11 of the liquid outlet unit and the liquid inlet screen 21 of the liquid inlet unit, thereby improving the overall structural stability and sealing performance of the filter membrane package.

[0082] In some embodiments, the first distance is set to 1-10 mm. It should be noted that when the first distance is less than 1 mm, the protruding edges of the liquid inlet screen 21 and the liquid outlet screen 11 are narrow, and due to the weaving characteristics of the screen itself, its structure is unstable and easily damages the adjacent filter membrane layer 4. At the same time, it is not enough to increase the combination with the rubber-coated part 5; when the first distance is greater than 10 mm, the liquid inlet screen 21 and the liquid outlet screen 11 are too protruding. Although the rubber-coated part 5 can effectively penetrate, the effective area of ​​the overall filtration of the filter membrane package is reduced. At the same time, the width of the rubber-coated part 5 is too large, which reduces the structural stability of the rubber-coated part 5.

[0083] In some embodiments, the width of the sealing ring 6 is 1-6 mm. During the process of squeezing and sealing between the liquid outlet units, the sealing ring 6 is squeezed first. Since the surface of the sealing ring 6 is flat, the filter membrane layer 4 can be prevented from directly contacting the screen during the squeezing and sealing process, thereby protecting the filter membrane layer 4. The height of the sealing ring 6 is 0.05-0.4 mm. When two adjacent liquid outlet units are squeezed, the sealing rings 6 can be fully squeezed and contacted, thereby improving the sealing between the liquid outlet units. On the other hand, the height of the sealing ring 6 is set so that during the squeezing and sealing process between the liquid inlet unit and the adjacent liquid outlet unit, the sealing ring 6 can protect the filter membrane layer 4 and prevent the filter membrane layer 4 from being damaged by direct contact with the liquid inlet screen 21 in the liquid inlet unit.

[0084] In some embodiments, the height of the sealing side of the first liquid inlet sealing portion 221 is greater than or equal to the height of the sealing side of the sealing ring 6. Preferably, the height of the sealing side of the first liquid inlet sealing portion 221 is equal to the height of the sealing side of the sealing ring 6.

[0085] In some embodiments, at least part of the second liquid inlet sealing portion (222) and the sealing ring (6) are arranged to overlap. Specifically, at least part of the second liquid inlet sealing portion 222 and the sealing ring 6 are arranged to be smoothly connected, and the smooth connection is a straight line connection or an arc connection; wherein at least part of the second liquid inlet sealing portion 222 is specifically arranged to be part of the outer sealing ring; or the entire second liquid inlet sealing portion 222.

[0086] In one embodiment, the sealing ring 6 and the first liquid inlet sealing portion 221 are integrally formed; in another embodiment, the sealing ring 6 and the second liquid inlet sealing portion 222 are integrally formed; in one embodiment, the first liquid inlet sealing portion 221 and the second liquid inlet sealing portion 222 are integrally formed; of course, the sealing ring 6, the first liquid inlet sealing portion 221 and the second liquid inlet sealing portion 222 can be integrally formed.

[0087] The filter membrane package of the new sealing structure provided in the present embodiment has a second liquid inlet sealing portion 222 that is in direct contact with the filter membrane layer 4, and the second liquid inlet sealing portion 222 squeezes the filter membrane layer 4 to achieve sealing between the liquid outlet unit and the liquid inlet unit. To prevent the second liquid inlet sealing portion 222 from protruding excessively, which may damage the filter membrane layer 4, a first liquid inlet sealing portion 221 with a height difference from the second liquid inlet sealing portion 222 is configured, thereby buffering and squeezing the filter membrane layer 4 relative to the outer periphery of the second liquid inlet sealing portion 222, thereby preventing the filter membrane from being excessively deformed in the inner sealing ring area and being damaged.

[0088] It should be noted that, in the above description, the corresponding height dimension is the initial stacking dimension. After the filter membrane package is coated and cured with the rubber coating part 5 aligned with the design dimension, the liquid outlet unit, the liquid inlet unit and the filter membrane layer 4 are squeezed against each other. For example, the first filter sealing portion 121 can contact and adhere to the filter membrane layer 4, and the structures are mutually constrained and abutted to form an effective seal for the filter membrane package.

[0089] Example 2

[0090] The difference from Example 1 is that, see Figure 6 In this embodiment, the liquid inlet seal 22 is arranged around the liquid outlet 33. The first liquid inlet seal 221 and the second liquid inlet seal 222 are used to seal the liquid outlet 33 in the area of ​​the liquid inlet seal 22 and buffer the extrusion stress in this area. The filter membrane package is not equipped with a sealing ring 6.

[0091] Example 3

[0092] The difference from Example 1 is that, see Figure 7 In this embodiment, the liquid inlet seal 22 is arranged around the liquid outlet 33. The first liquid inlet seal portion 221 and the second liquid inlet seal portion 222 are used to seal the liquid outlet 33 in the area of ​​the liquid inlet seal 22 and buffer the extrusion stress in this area.

[0093] Example 4

[0094] The difference from Example 1 is that, see Figures 8 to 11In this embodiment, the liquid outlet unit, the liquid inlet unit and the filter membrane layer 4 are structured to form more than two liquid inlets 31, reflux ports 32 and liquid outlets 33. The filter membrane package with a novel sealing structure provided in this embodiment can have stronger filtering and concentration processing capabilities.

[0095] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A new type of sealing structure of the filter membrane package, It is characterized in that include: At least one liquid outlet unit, comprising a liquid outlet screen (11) and a liquid outlet seal (12); At least one liquid inlet unit, the liquid inlet unit and the liquid outlet unit are arranged at intervals; the liquid inlet unit comprises a liquid inlet screen (21) and a liquid inlet sealing element (22); A filter membrane layer (4), correspondingly arranged between the liquid outlet unit and the liquid inlet unit; and a rubber coating member (5), wherein the rubber coating member (5) wraps and seals the outer periphery of the liquid outlet unit, the liquid inlet unit and the filter membrane layer (4); The liquid outlet unit, the liquid inlet unit and the filter membrane layer (4) are all provided with a liquid inlet (31), a reflux port (32) and a liquid outlet (33) at corresponding positions; the liquid outlet seal (12) is respectively provided at the liquid inlet through hole and the reflux through hole of the liquid outlet screen (11), and the liquid inlet seal (22) is provided at the liquid outlet through hole of the liquid inlet screen (21); The liquid inlet sealing element (22) comprises a first liquid inlet sealing portion (221) and a second liquid inlet sealing portion (222), at least a portion of the first liquid inlet sealing portion (221) is arranged on the outer periphery of the liquid outlet through hole of the liquid inlet screen (21), and the second liquid inlet sealing portion (222) is arranged on the inner side of the first liquid inlet sealing portion (221), at least a portion of the second liquid inlet sealing portion (222) is arranged on the inner side of the liquid outlet through hole of the liquid inlet screen (21), and the inner side wall of the second liquid inlet sealing portion (222) forms a liquid outlet (33) on the liquid inlet unit; The second liquid inlet sealing portion (222) is protrudingly arranged on a side of the first liquid inlet sealing portion (221) away from the liquid inlet screen (21).

2. The filter membrane package of the novel sealing structure according to claim 1, It is characterized in that The height of the first liquid inlet sealing portion (221) protruding from the side wall surface of the liquid inlet screen (21) is set to 0.2-2.0 mm.

3. The filter membrane package of the novel sealing structure according to claim 1, It is characterized in that The height of the second liquid inlet sealing portion (222) protruding from the side wall surface of the first liquid inlet sealing portion (221) is set to be 0.1-0.8 mm.

4. The filter membrane package of the novel sealing structure according to claim 1, It is characterized in that The liquid inlet sealing member (22) is provided with a first sealing end surface and a second sealing end surface, and the first liquid inlet sealing portion (221) and the second liquid inlet sealing portion (222) are arranged on the first sealing end surface and / or the second sealing end surface; and / or The cross-sectional shape of the first liquid inlet sealing portion (221) and the cross-sectional shape of the second liquid inlet sealing portion (222) are set to be the same.

5. The filter membrane package of the novel sealing structure according to claim 4, It is characterized in that The extension length of the first liquid inlet sealing portion (221) along the first sealing end surface and / or the second sealing end surface is set to 5-15 mm, and the extension length of the second liquid inlet sealing portion (222) along the first sealing end surface and / or the second sealing end surface is set to 2-8 mm.

6. A filter membrane package with a novel sealing structure according to any one of claims 1 to 5, It is characterized in that The liquid outlet seal (12) comprises a first filter seal portion (121) and a second filter seal portion (122), at least part of the first filter seal portion (121) is arranged on the outer periphery of the liquid inlet through hole and the reflux through hole of the liquid outlet screen (11), the second filter seal portion (122) is arranged on the inner side of the first filter seal portion (121), at least part of the second filter seal portion (122) is arranged on the inner side of the liquid inlet through hole and the reflux through hole of the liquid outlet screen (11), and the inner side wall of the correspondingly arranged second filter seal portion (122) forms the liquid inlet port (31) and the reflux port (32) on the liquid inlet unit; The second filter sealing portion (122) is protrudingly arranged on a side of the first filter sealing portion (121) away from the liquid outlet screen (11).

7. The filter membrane package of the novel sealing structure according to claim 6, It is characterized in that The height of the first filter seal portion (121) protruding from the side wall surface of the liquid outlet screen (11) is set to 0.2-2.0 mm, and the height of the second filter seal portion (122) protruding from the side wall surface of the first filter seal portion (121) is set to 0.1-0.8 mm.

8. The filter membrane package of the novel sealing structure according to claim 6, It is characterized in that The liquid outlet seal (12) is provided with a third sealing end surface and a fourth sealing end surface, and the first filter seal portion (121) and the second filter seal portion (122) are arranged on the third sealing end surface and / or the fourth sealing end surface; and / or The cross-sectional shape of the first filter seal portion (121) and the cross-sectional shape of the second filter seal portion (122) are set to be the same.

9. The filter membrane package of the novel sealing structure according to claim 1, It is characterized in that The filter membrane package further comprises a sealing ring (6), wherein the sealing ring (6) and the liquid outlet unit, the liquid inlet unit and the outer periphery of the filter membrane layer (4) are arranged at a first distance, wherein the first distance is set to 1-10 mm, and at least a portion of the rubber package (5) is abutted and sealed against the outer side of the sealing ring (6).

10. The filter membrane package of the novel sealing structure according to claim 9, It is characterized in that The height of the sealing side of the first liquid inlet sealing portion (221) is greater than or equal to the height of the sealing side of the sealing ring (6); and / or At least a portion of the second liquid inlet sealing portion (222) and the sealing ring (6) are arranged to overlap.

11. The filter membrane package of the novel sealing structure according to claim 9, It is characterized in that The sealing ring (6) and the first liquid inlet sealing portion (221) are integrally formed; or The sealing ring (6) and the second liquid inlet sealing portion (222) are integrally formed; or The first liquid inlet sealing portion (221) and the second liquid inlet sealing portion (222) are integrally formed; or The sealing ring (6), the first liquid inlet sealing portion (221) and the second liquid inlet sealing portion (222) are integrally formed.

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