Film bag

Abstract

A membrane bag comprises a liquid inlet unit and liquid filtering units arranged on the two sides of the liquid inlet unit. The liquid inlet unit at least comprises a liquid inlet screen; the filtrate unit comprises a filtrate screen and a filter membrane; the peripheral rubber coating part at least surrounds the peripheral side of the liquid inlet unit; the liquid inlet screen further comprises a peripheral sealing part, the peripheral sealing part and the peripheral rubber coating part are not integrally arranged, the peripheral sealing part penetrates through the liquid inlet screen in the thickness direction of the liquid inlet screen, and the peripheral sealing part protrudes out of the liquid inlet screen on the two faces of the liquid inlet screen. At least part of the edge of the liquid inlet screen protrudes out of the peripheral sealing part so that a transition connecting area can be formed on the outer side of the peripheral sealing part, and glue liquid of the peripheral rubber coating part permeates into the transition connecting area. The peripheral sealing parts are connected end to end along the edge contour of the liquid inlet screen; the sealing structure has the advantages that the sealing connection effect among the peripheral rubber coating part, the peripheral sealing part and the liquid inlet screen is guaranteed, and meanwhile the situation that the sealing edge, making contact with a flow channel, on the liquid inlet screen is not uniform is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of filter structure, in particular to a membrane package. BACKGROUND

[0002] The membrane package is usually formed by alternately stacking liquid inlet unit layers and filtrate unit layers and then sealing the periphery, wherein the periphery is usually sealed by the method of extracting glue, so that the glue penetrates into the screen structure of the liquid inlet unit layer and solidifies to form a peripheral sealing part, thereby sealing the entire membrane package.

[0003] However, in the process of processing the peripheral sealing part of the existing membrane package, the flow direction of the glue is not fixed, which easily leads to uneven sealing edges of the screen and the flow channel, especially the sealing edges of the liquid inlet screen (since the filtrate screen is pre-packaged in some membrane packages) and the flow channel.

[0004] When the sealing edges of the liquid inlet screen and the flow channel are uneven, on the one hand, the peripheral sealing part occupies a large area on the liquid inlet screen, thereby affecting the effective filtration area of the liquid inlet screen, and on the other hand, the inner edge of the glue is prone to uneven structure due to the influence of various small disturbances during the penetration of the glue, thereby easily leading to the retention of fluid at the sealing edge of the membrane package during use, further affecting the filtration efficiency, and even causing fluid pollution. SUMMARY

[0005] The utility model solves the technical problem in the prior art, and provides a membrane package.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A membrane package includes a liquid inlet unit and a filtrate unit arranged on both sides of the liquid inlet unit.

[0008] The liquid inlet unit includes at least a liquid inlet screen.

[0009] The filtrate unit includes a filtrate screen and a filter membrane between the filtrate screen and the liquid inlet screen.

[0010] It also includes a peripheral sealing part, which is not integrally arranged with the peripheral sealing part and penetrates through the liquid inlet screen in the thickness direction of the liquid inlet screen, and the peripheral sealing part protrudes from the liquid inlet screen on both sides of the liquid inlet screen.

[0011] It also includes a peripheral sealing part, which is not integrally arranged with the peripheral sealing part and penetrates through the liquid inlet screen in the thickness direction of the liquid inlet screen, and the peripheral sealing part protrudes from the liquid inlet screen on both sides of the liquid inlet screen.

[0012] The liquid inlet screen mesh is at least partially protruded from the periphery sealing part to form a transition connection area outside the periphery sealing part, and the glue liquid of the outer periphery rubber coating part penetrates into the transition connection area.

[0013] The periphery sealing part is connected head to tail along the edge profile of the liquid inlet screen mesh.

[0014] According to the above technical solution, the periphery sealing part is pre-set, penetrates the liquid inlet screen mesh from the thickness direction of the liquid inlet screen mesh, and is connected head to tail along the edge profile of the liquid inlet screen mesh, and forms a transition connection area outside the periphery sealing part. Thus, a blocking structure can be formed at the edge of the liquid inlet screen mesh, so that the glue liquid of the outer periphery rubber coating part is blocked and limited by the periphery sealing part during processing and is filled in the transition connection area. The sealing connection effect between the outer periphery rubber coating part, the periphery sealing part and the liquid inlet screen mesh can be ensured, and the sealing edge of the liquid inlet screen mesh in contact with the flow channel can be uniformly ensured. On the one hand, the flow area of the fluid on the liquid inlet screen mesh can be prevented from being reduced to affect the flow efficiency of the fluid. On the other hand, the fluid can be prevented from being retained at the sealing edge of the liquid inlet screen mesh, and the flow efficiency of the fluid can be further prevented from being affected. In addition, the periphery sealing part protrudes from the liquid inlet screen mesh on both sides, so that the filter membrane on both sides of the liquid inlet screen mesh can be pressed by the periphery sealing part during stacking of the liquid inlet unit and the filtrate unit, and the filter membrane can be prevented from being wrinkled due to the flowing force of the glue liquid of the outer periphery rubber coating part during processing.

[0015] Preferably, the thickness H of the periphery sealing part protruding from the end surface of the liquid inlet screen mesh is 0.1mm≦H≦2mm.

[0016] According to the above technical solution, the thickness of the periphery sealing part protruding from the end surface of the liquid inlet screen mesh is reasonably set. On the one hand, the periphery sealing part can support the flow channel and press the filter membrane, increase the flow efficiency of the fluid, and prevent the filter membrane from being wrinkled during processing of the outer periphery rubber coating part and flow of the fluid. On the other hand, the flow channel can be prevented from being too small to cause too large fluid resistance or too large to cause flow retention, thereby preventing the flow efficiency of the fluid from being affected. In addition, the thickness of the membrane package can be prevented from being too large due to the too large protruding thickness.

[0017] Preferably, the filtrate unit further comprises an end cover, and the filtrate unit has a fixed connection area for fixedly connecting the end cover. The projection of the fixed connection area and the periphery sealing part on the plane where the end cover is located at least partially overlaps.

[0018] By the technical scheme, the fixed connection area for connecting with the end cover is arranged on the end face of the filtrate unit, so that the connection strength and stability of the filtrate unit (specifically, the filtrate screen) and the end cover can be increased, and the folding of the filtrate unit can be avoided. Further, the projection of the fixed connection area and the peripheral sealing portion on the plane of the end cover at least partially overlaps, and when the liquid inlet unit and the filtrate unit of the membrane package are stacked, the peripheral sealing portion can be pressed on the fixed connection area, so that the pressing effect of the peripheral sealing portion on the filtrate unit can be further increased, the connection between the filtrate screen and the filter membrane and the end cover is further strengthened, and the sealing performance of the membrane package as a whole can be further improved.

[0019] In addition, the end cover is arranged such that after clamping, the peripheral sealing portion can be filled with glue and cured to form a peripheral rubber-coated portion, so that the influence of the force of the glue liquid on the liquid inlet unit and the filtrate unit during processing of the peripheral rubber-coated portion can be further reduced, and the flatness of the liquid inlet screen, the filtrate screen and the filter membrane can be further increased.

[0020] Preferably, a protruding structure is arranged on one end of the end cover protruding towards the liquid inlet screen, and the protruding structure surrounds at least part of the edge area of the filtrate unit.

[0021] By the technical scheme, the protruding structure has the effect of raising the flow channel, thereby facilitating the increase of the flow efficiency on the liquid inlet screen.

[0022] Preferably, the ratio of the thickness H1 of the protruding structure to the thickness H of the peripheral sealing portion protruding from the end face of the liquid inlet screen satisfies: 1≦H1 / H≦0.5.

[0023] and / or;

[0024] The thickness H1 of the protruding structure is in the range of 0.1mm≦H1≦1mm.

[0025] By the technical scheme, the thickness H1 of the protruding structure is reasonably arranged, so that the fluid resistance caused by too small flow channel width can be avoided, thereby ensuring the flow rate of the fluid in the flow channel, and the thickness of the membrane package can be prevented from increasing due to too large thickness of the protruding structure, and the flow channel can be prevented from being too wide due to too large thickness of the protruding structure, thereby avoiding fluid retention. In addition, it can be known that the peripheral sealing portion is generally a flexible structure, and the protruding structure arranged on one end of the end cover generally has greater hardness, so that the deformation ability of the peripheral sealing portion is greater than that of the protruding structure. Further, by reasonably arranging the ratio between the thickness H1 of the protruding structure and the thickness H of the peripheral sealing portion protruding from the end face of the liquid inlet screen, the gap of the flow channel between the membrane package layer structures (the liquid inlet unit and the filtrate unit, and the filtrate unit and the end cover) can be made smaller or equal, so that the flow in the membrane package can be uniformly and evenly.

[0026] Preferably, the projection of the convex structure is located outside the projection of the peripheral sealing portion along the thickness direction of the membrane package.

[0027] By the above technical solution, the convex structure is arranged along the edge of the peripheral sealing portion and located outside the peripheral sealing portion. When the liquid inlet unit, the filtrate unit and the end cover are stacked with each other, the convex structure can press the local part of the liquid inlet screen mesh located outside the edge of the peripheral sealing portion, so as to avoid the wrinkle of the liquid inlet screen mesh in the process of processing the outer peripheral rubber coating portion.

[0028] Preferably, the convex structure is attached to the outer edge of the peripheral sealing portion, or the shortest distance between the convex structure and the outer edge of the peripheral sealing portion is not greater than 1 mm.

[0029] By the above technical solution, the non-overlapping structure of the convex structure and the peripheral sealing portion can improve the sealing effect of the peripheral sealing portion itself and reduce the interference of the convex structure on the lifting of the flow channel. In addition, limiting the distance between the convex structure and the outer edge of the peripheral sealing portion can effectively prevent the outer edge of the peripheral sealing portion from having a large gap, so as to allow a certain installation error when the layer structure is stacked, facilitate assembly, and at the same time, the error gap can be completely filled by the outer peripheral rubber coating portion, without affecting the connection effect between the outer peripheral rubber coating portion and the peripheral sealing portion.

[0030] Preferably, the ratio of the length L1 of the convex structure to the length L2 of the peripheral sealing portion along the contour direction of the peripheral sealing portion satisfies: 0.1≦L1 / L2≦0.4.

[0031] By the above technical solution, the circumference of the convex structure (referring to the length of the convex structure along the contour direction of the peripheral sealing portion) is reasonably set, so as to avoid that the circumference of the convex structure is too long, and then avoid that the convex structure limits the penetration of the outer peripheral rubber coating portion into the liquid inlet screen mesh to connect with the peripheral sealing portion, and further avoid affecting the stability and sealing effect of the connection of the entire membrane package edge. The circumference of the convex structure can also be avoided to be too short, so that the convex structure can have a good supporting effect on the liquid inlet screen mesh, and avoid that the liquid inlet screen mesh is easily depressed or distorted.

[0032] Preferably, the hardness of the convex structure is greater than that of the peripheral sealing portion.

[0033] By the above technical solution, the hard convex structure can increase the supporting effect on the flow channel. At the same time, the hardness of the convex structure is greater than that of the peripheral sealing portion, so that the peripheral sealing portion 4 is more easily deformed in the process of stacking and extrusion, and then the supporting effect of the convex structure on the flow channel is not affected.

[0034] Preferably, the transition connection zone is arranged outside the peripheral sealing portion.

[0035] By the technical scheme, the transition connection area is arranged outside the peripheral sealing part, on one hand, the liquid inlet screen edge can be filled with glue, further increasing the flatness of the screen, on the other hand, the peripheral rubber coating part can be completely filled in the liquid inlet screen periphery, further increasing the sealing distance of the liquid inlet screen along the end surface, increasing the membrane package sealing property.

[0036] Preferably, the width W1 of the transition connection area ranges from 1mm to 8mm.

[0037] And / or,

[0038] The total width W of the transition connection area and the peripheral sealing part ranges from 2mm to 10mm.

[0039] By the technical scheme, the width of the transition connection area and the width of the peripheral sealing part are reasonably arranged, on one hand, the glue of the peripheral rubber coating part can permeate into the transition connection area, tightly connecting with the liquid inlet screen, improving the sealing effect and flatness of the membrane package periphery, on the other hand, the width of the peripheral sealing part can be reduced to a certain extent, and the width of the transition connection area and the width of the peripheral sealing part can not be too large to affect the effective flow area of the fluid on the liquid inlet screen.

[0040] Compared with the prior art, the utility model has at least the following beneficial effects:

[0041] 1、The peripheral sealing part is arranged in advance, permeates and penetrates the liquid inlet screen along the thickness direction of the liquid inlet screen, the peripheral sealing part is connected head to tail along the edge contour of the liquid inlet screen, and the transition connection area is formed outside the peripheral sealing part, so that the blocking structure is formed on the edge of the liquid inlet screen, the glue of the peripheral rubber coating part is blocked and positioned by the peripheral sealing part during processing, and the glue is filled in the transition connection area, the sealing connection effect between the peripheral rubber coating part, the peripheral sealing part and the liquid inlet screen is ensured, the sealing edge of the liquid inlet screen contacting the flow channel is uniform, on one hand, the flow area of the fluid on the liquid inlet screen is not reduced to affect the flow efficiency of the fluid, on the other hand, the fluid is not retained on the sealing edge of the liquid inlet screen, further avoiding affecting the flow efficiency of the fluid, and the peripheral sealing part protrudes on both sides of the liquid inlet screen, the filter membrane on both sides of the liquid inlet screen is pressed by the peripheral sealing part during the stacking of the liquid inlet unit and the filtrate unit, and the glue flow force of the peripheral rubber coating part during processing does not cause the filter membrane to wrinkle.

[0042] 2、By setting the fixed connection area for connecting with the end cover on the end face of the filtrate unit, the connection strength and stability of the filtrate unit (specifically the filtrate screen) and the end cover can be increased, and the folding of the filtrate unit can be avoided. Further, the projection of the fixed connection area and the peripheral sealing portion on the plane where the end cover is located at least partially overlaps, and when the liquid inlet unit and the filtrate unit of the membrane package are stacked, the peripheral sealing portion can be pressed on the fixed connection area, which can further increase the pressing effect of the peripheral sealing portion on the filtrate unit, further strengthen the connection between the filtrate screen and the filter membrane and the end cover, and further improve the sealing performance of the membrane package as a whole. In addition, the setting of the end cover enables the end cover to be clamped, and then the peripheral rubber portion can be formed by filling and curing based on the thickness of the peripheral sealing portion, which can further reduce the influence of the force of the glue liquid on the liquid inlet unit and the filtrate unit during the processing of the peripheral rubber portion, and further increase the flatness of the liquid inlet screen, the filtrate screen and the filter membrane.

[0043] 3、Reasonable setting of the thickness H1 of the protruding structure can avoid excessive fluid resistance caused by too small flow channel width, thereby ensuring the flow rate of the fluid in the flow channel, and can also avoid excessive thickness of the protruding structure, which increases the thickness of the entire membrane package and also avoids excessive thickness of the protruding structure, which causes the flow channel to be too wide and further causes fluid retention. In addition, it can be known that the peripheral sealing portion is generally a flexible structure, and the end cover and the protruding structure provided at one end thereof generally have greater hardness, so that the deformation ability of the peripheral sealing portion is greater than that of the protruding structure when it is extruded. Further, by reasonably setting the ratio between the thickness H1 of the protruding structure and the thickness H of the peripheral sealing portion protruding from the end face of the liquid inlet screen, the spacing difference between the flow channels of the membrane package layer structure (the liquid inlet unit and the filtrate unit, and the filtrate unit and the end cover) can be small or equal, so that the flow in the membrane package can flow uniformly. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0045] Figure 1 The structure schematic diagram of the embodiment one provided by the present application.

[0046] Figure 2 The structure schematic diagram of the embodiment two provided by the present application. Figure 1 The enlarged schematic diagram of the D1 position in the embodiment two.

[0047] Figure 3 The structure schematic diagram of the embodiment three provided by the present application. Figure 1 The enlarged schematic diagram of the D2 position in the embodiment three.

[0048] Figure 4 The structural schematic diagram of the embodiment two provided by the utility model.

[0049] Figure 5 For Figure 4 The enlarged schematic view of D position.

[0050] Figure 6 The structural schematic diagram of the embodiment three provided by the utility model.

[0051] Figure 7 For Figure 6 The enlarged schematic view of D3 position.

[0052] Figure 8 The structural schematic diagram of the embodiment four provided by the utility model.

[0053] Figure 9 For Figure 8 The enlarged schematic view of D4 position.

[0054] Figure 10 For Figure 8 The encapsulation schematic view (cutting) of end cover and filtrate unit.

[0055] Figure 11 The structural schematic diagram of the embodiment five provided by the utility model.

[0056] Figure 12 For Figure 11 The enlarged schematic view of D5 position.

[0057] Figure 13 For Figure 11 The overhead schematic view (partially broken) of.

[0058] Figure 14 The structural schematic diagram of the embodiment six provided by the utility model.

[0059] Mark explanation:

[0060] 1, liquid inlet unit;11, liquid inlet screen;2, filtrate unit;20, fixed connection area;21, filtrate screen;211, rubber ring;22, filter membrane;3, outer periphery rubberized part;4, peripheral sealing part;5, transition connection area;6, end cover;61, inner end cover;611, main plate;612, ring encapsulation part;62, outer end cover;7, convex structure. Specific implementation

[0061] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0062] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0063] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] Embodiment one

[0065] Referring to Figures 1 to 3 The present application provides a membrane package, comprising a liquid inlet unit 1, and a filtrate unit 2 arranged on both sides of the liquid inlet unit 1; further comprising an outer peripheral rubber coating part 3 at least surrounding the periphery of the liquid inlet unit 1.

[0066] Specifically, the liquid inlet unit 1 comprises a liquid inlet screen 11, the filtrate unit 2 comprises a filtrate screen 21, and the filter membrane 22 is located between the filtrate screen 21 and the liquid inlet screen 11. Among them, the liquid inlet screen 11, the filter membrane 22 and the filtrate screen 21 are alternately stacked, and the outer peripheral rubber coating part 3 is arranged around the periphery of the liquid inlet unit 1 and the filtrate unit 2 to form a filter part. Of course, in other embodiments, the liquid inlet unit 1 can also include a filter layer, and when the filter layer is provided, the filter layer can be arranged on one side or both sides of the liquid inlet screen 11.

[0067] Since the glue liquid of the outer periphery rubber coating part 3 will penetrate into the liquid inlet screen 11 and solidify on the liquid inlet screen 11 during processing, and since the flow direction of the glue liquid is not fixed, the contact sealing edges of the liquid inlet screen 11 and the flow channel are prone to be uneven. Therefore, in the embodiment, a peripheral sealing part 4 is further included, the peripheral sealing part 4 and the outer periphery rubber coating part 3 are not integrally arranged, the peripheral sealing part 4 penetrates through the liquid inlet screen 11 along the thickness direction of the liquid inlet screen 11, and the peripheral sealing part 4 protrudes from the liquid inlet screen 11 on both sides of the liquid inlet screen 11. At least part of the edge of the liquid inlet screen 11 protrudes from the peripheral sealing part 4 to form a transition connection area 5 outside the peripheral sealing part 4, and the glue liquid of the outer periphery rubber coating part 3 penetrates into the transition connection area 5; the peripheral sealing part 4 is connected end to end along the edge contour of the liquid inlet screen 11.

[0068] It can be known that the peripheral sealing part 4 and the outer periphery rubber coating part 3 are not integrally arranged, and during the film wrapping process, the peripheral sealing part 4 is arranged on the liquid inlet screen 11 in advance, and the peripheral sealing part 4 is connected end to end along the edge contour of the liquid inlet screen 11, and a transition connection area 5 is formed outside the peripheral sealing part 4. Thus, a blocking structure can be formed on the edge of the liquid inlet screen 11, so that the glue liquid of the outer periphery rubber coating part 3 is blocked and limited by the peripheral sealing part 4 during processing, and fills in the transition connection area 5. In this way, the sealing connection effect between the outer periphery rubber coating part 3, the peripheral sealing part 4 and the liquid inlet screen 11 can be ensured, and the unevenness of the sealing edges of the liquid inlet screen 11 in contact with the flow channel can be avoided. Ensuring the uniformity of the sealing edges of the liquid inlet screen 11 in contact with the flow channel can avoid the reduction of the flow area of the fluid on the liquid inlet screen 11 and affect the flow efficiency of the fluid, and can also avoid the stagnation of the fluid at the sealing edges of the liquid inlet screen 11, further avoiding the influence on the flow efficiency of the fluid. In addition, the peripheral sealing part 4 protrudes from the liquid inlet screen 11 on both sides of the liquid inlet screen 11, so that the filter membrane 22 located on both sides of the liquid inlet screen 11 can be pressed tightly by the peripheral sealing part 4 during the stacking process of the liquid inlet unit 1 and the filtrate unit 2, and the glue liquid of the outer periphery rubber coating part 3 during processing can avoid causing the filter membrane 22 to wrinkle.

[0069] Referring to Figure 1 and Figure 2, the thickness H of the peripheral sealing portion 4 protruding from the end surface of the liquid inlet screen 11 can be set to 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, or 2 mm. It can be understood that the value of H can satisfy 0.1 mm≦H≦2 mm, and by reasonably setting the thickness of the peripheral sealing portion 4 protruding from the end surface of the liquid inlet screen 11, on the one hand, the effect of supporting the flow channel and compressing the filter membrane 22 can be achieved, which increases the fluid flow efficiency while avoiding wrinkles of the filter membrane 22 during the processing of the peripheral rubber coating portion 3 and the fluid flow; on the other hand, it can avoid that the too small flow channel leads to too large fluid resistance or the too large flow channel easily leads to flow retention, thereby avoiding affecting the fluid flow efficiency, and at the same time, it can also avoid that the too large thickness of the membrane package caused by the too large thickness of the peripheral sealing portion 4 protruding.

[0070] Referring to Figure 1 and Figure 2 , the transition connection area 5 is arranged around the outside of the peripheral sealing portion 4, on the one hand, the edges of the liquid inlet screen 11 can be filled with glue, which further increases the flatness of the screen, on the other hand, the peripheral rubber coating portion 3 can be completely filled around the liquid inlet screen 11, thereby increasing the sealing distance of the liquid inlet screen 11 along the end surface and increasing the sealing property of the membrane package.

[0071] Further, the width W1 of the transition connection area 5 can be set to 1 mm, 4.5 mm, or 8 mm. Of course, the value range of W1 satisfies 1 mm≦W1≦8 mm. By reasonably setting the width of the transition connection area 5 and the width of the peripheral sealing portion 4, on the one hand, the glue of the peripheral rubber coating portion 3 can penetrate into the transition connection area 5 to form a close connection with the liquid inlet screen 11, which improves the sealing effect and flatness of the peripheral of the membrane package, and at the same time, it can also reduce the width of the peripheral sealing portion 4 to a certain extent; on the other hand, it can also avoid that the too large width of the transition connection area 5 and the peripheral sealing portion 4 affects the effective flow area of the fluid on the liquid inlet screen 11.

[0072] In another embodiment, the total width W of the transition connection area 5 and the peripheral sealing portion 4 can be set to 2 mm, 6 mm, or 10 mm, of course, the value range of W1 satisfies 2 mm≦W≦10 mm.

[0073] Referring to Figure 1 and Figure 3 , the end cover 6 is further included. The side wall of the end cover 6 is connected with the peripheral rubber coating portion 3. Of course, in other embodiments, the peripheral rubber coating portion 3 can also be connected with the end cover 6 close to the side end surface of the filtrate unit 2, which can be set according to the actual situation. It can be understood that the setting of the end cover 6 makes the end cover 6 clamped, and the peripheral sealing portion 4 is filled with glue and solidified to form the peripheral rubber coating portion 3, which can further reduce the influence of the glue force during the processing of the peripheral rubber coating portion on the liquid inlet unit 1 and the filtrate unit 2, and further increase the flatness of the liquid inlet screen 11, the filtrate screen 21, and the filter membrane 22.

[0074] Further, in order to increase the connection strength and stability of the filtrate unit 2 and the end cover 6, and to avoid the folding of the filtrate unit 2, the filtrate unit 2 has a fixed connection area 20 for fixedly connecting the end cover 6. The fixed connection area 20 completely overlaps the projection of the peripheral sealing portion 4 on the plane of the end cover 6. When the liquid inlet unit 1 and the filtrate unit 2 of the membrane package are stacked, the peripheral sealing portion 4 can be pressed on the fixed connection area 20, which can further increase the pressing effect of the peripheral sealing portion on the filtrate unit 2, further strengthen the connection between the filtrate screen 21 and the filter membrane 22 and the end cover 6, and further improve the sealing performance of the whole membrane package.

[0075] Further, in order to avoid the setting of the fixed connection area 20 from having a great impact on the body structure of the filtrate screen 21, in the embodiment, a rubber ring 211 is formed on the filtrate screen 21 of the filtrate unit 2, and the rubber ring 211 penetrates at least from one side of the filtrate screen 21 to the other side of the filtrate screen 21 to form a seal on the edge of the filtrate screen 21. The fixed connection area 20 is formed in the area of the rubber ring 211 to reduce the loss of the body of the filtrate screen 21 and make the extrusion and fixing structure of the whole membrane package more stable. Of course, in another example, the fixed connection area 20 can also be directly formed on the body structure of the filtrate screen 21, that is, the body structure of the filtrate screen 21 is welded to the end cover 6 to form the corresponding fixed connection area 20.

[0076] Embodiment Two

[0077] Referring to Figure 4 and Figure 5 , in order to play the role of raising the flow channel and further increase the flow efficiency of the fluid in the flow channel, the end cover 6 protrudes towards the one end of the liquid inlet screen 11 and is provided with a protruding structure 7 surrounding at least part of the edge area of the filtrate unit 2. It can be known that the protruding structure 7 can surround the edge of the filtrate unit 2 for one turn, or can be provided with multiple strip structures at intervals, and generally, the protruding structure 7 only needs to cover part of the edge area to achieve the effect of raising the flow channel. It is worth noting that the "flow channel" referred to here can be the flow channel on the filtrate screen 21, the flow channel on the liquid inlet screen 11, the flow channel between the filtrate screen 21 and the end cover 6, the flow channel between the liquid inlet screen 11 and the filter membrane 21, or the flow channel between the end cover 6 and the liquid inlet screen 11. The structure of the end cover 6 and the structure of the protruding structure 7 can be set according to the needs to support the flow channels at different positions of the membrane package.

[0078] Specifically, in the embodiment, the end cover 6 is provided in a plate structure, and the protruding structure 7 protrudes from one side end surface of the end cover 6 towards the filtrate screen 21, thereby achieving the effect of increasing the flow efficiency of the flow passage on the filtrate screen 21 and between the filtrate screen 21 and the end cover.

[0079] Further, the ratio of the thickness H1 of the protruding structure 7 to the thickness H of the peripheral sealing portion 4 protruding from the end surface of the liquid inlet screen 11 can be 1, 0.75 or 0.5, and by reasonably setting the thickness H1 of the protruding structure 7, the flow resistance caused by too small flow passage width can be avoided, thereby ensuring the flow rate of the fluid in the flow passage, and the thickness of the entire membrane package can be prevented from being increased due to the too large thickness of the protruding structure 7, and the flow passage can be prevented from being too wide due to the too large thickness of the protruding structure 7, thereby avoiding the fluid stagnation. In addition, it can be understood that the peripheral sealing portion 4 is generally flexible, and the end cover 6 and the protruding structure 7 provided at one end thereof generally have greater hardness, and therefore, the deformation capacity of the peripheral sealing portion 4 is greater than that of the protruding structure 7 when being pressed, and further, by reasonably setting the ratio between the thickness H1 of the protruding structure 7 and the thickness H of the peripheral sealing portion 4 protruding from the end surface of the liquid inlet screen 11, the spacing difference between the flow passages of the membrane package layer structure can be ensured to be small or equal, so that the flow in the membrane package can be uniformly and evenly flowed. Of course, it can be understood that the ratio of the thickness H1 of the protruding structure 7 to the thickness H of the peripheral sealing portion 4 protruding from the end surface of the liquid inlet screen 11 satisfies 1≦H1 / H≦0.5. Generally, since the deformation amount of the protruding structure 7 is smaller than that of the peripheral sealing portion 4 when being pressed, in order to maintain the uniform spacing of the flow passages at different positions in the membrane package, the thickness of the protruding structure 7 is generally smaller than that of the peripheral sealing portion 4.

[0080] Further, the thickness H1 of the protruding structure 7 can be set to 0.1 mm, 0.5 mm or 1 mm. It can be understood that the value range of H1 satisfies 0.1≦H1≦1. Generally, the thickness of the protruding structure 7 protruding from the liquid inlet screen 11 is smaller than that of the peripheral sealing portion 4, so that the peripheral sealing portion 4 can be compressed during packaging, thereby providing a better sealing effect.

[0081] Embodiment Three

[0082] Referring to Figure 6 and Figure 7 , based on the above-mentioned embodiment one, the difference of the embodiment is that the projection of the fixed connection area 20 and the peripheral sealing portion 4 on the plane of the end cover 6 partially overlaps, the projection area of the fixed connection area 20 is greater than that of the peripheral sealing portion 4, the fixed connection area 20 protrudes from the area where the rubber ring 211 is located and is formed on the body of the filtrate screen 21.

[0083] Embodiment Four

[0084] Referring to Figures 8 to 10, based on the above embodiment two, the difference of the present embodiment is that the end cover 6 comprises an inner end cover 61 and an outer end cover 62, the inner end cover 61 comprises a main plate 611 and a surrounding packaging part 612, wherein the filtrate unit 2 is stacked on one side of the main plate 611, the surrounding packaging part 612 is arranged around the edge of the main plate 611 and the filtrate unit 2, and the surrounding packaging part 612 covers part of the end face of the filter membrane 22 away from the filtrate screen 21, so that the filtrate screen 21 and the filter membrane 22 of the filtrate unit 2 are clamped between the main plate 611 and the surrounding packaging part 612. It can be known that in the present embodiment, the filtrate unit 2 located at the end side of the filtering part is pre-packaged with the inner end cover 61, and the packaged filtrate unit 2 is stacked with the liquid inlet screen 11 into the filtering part. The outer periphery rubber part 3 is wrapped around the outer edge of the surrounding packaging part 612, the outer end cover 62 and the liquid inlet screen 11.

[0085] Of course, in other embodiments, the un-pre-packaged filtrate unit 2 can also be stacked in the middle of the filtering part.

[0086] Further, in order to play the role of raising the flow channel, and further facilitate to increase the flow efficiency on the re-liquid inlet screen 11, the end of the liquid inlet screen 11 facing the surrounding packaging part 612 is provided with a protruding structure 7, and the protruding structure 7 surrounds the edge area of the filtrate unit 2.

[0087] Further, in the direction of the film package thickness, the projection of the protruding structure 7 is located outside the projection of the peripheral sealing part 4. When the liquid inlet unit 1, the filtrate unit 2 and the end cover 6 are stacked with each other, the protruding structure 7 can press the part of the liquid inlet screen 11 located outside the outer edge of the peripheral sealing part 4, so as to avoid the liquid inlet screen 11 from being wrinkled in the process of processing the outer periphery rubber part 3. At the same time, the protruding structure 7 and the peripheral sealing part 4 are arranged in a non-overlapping structure, which can improve the sealing effect of the peripheral sealing part 4 itself and reduce the interference of the protruding structure 7 with the raised flow channel.

[0088] Further, the protruding structure 7 is attached to the outer edge of the peripheral sealing part 4.

[0089] Further, in the direction of the contour of the peripheral sealing part 4, the ratio of the length L1 of the protruding structure 7 to the length L2 of the peripheral sealing part 4 can be 0.1, 0.2, 0.3 or 0.4, of course, it satisfies 0.1≦L1 / L2≦0.4. By reasonably setting the circumference of the protruding structure 7, it can avoid that the circumference of the protruding structure 7 is too long, and further avoid that the protruding structure 7 limits the outer periphery rubber part 3 from penetrating into the liquid inlet screen 11 to connect with the peripheral sealing part 4, and further avoid affecting the stability and sealing effect of the whole membrane package edge connection. It can also avoid that the circumference of the protruding structure 7 is too short, and further make the protruding structure 7 have a good supporting effect on the liquid inlet screen 11, so as to avoid that the liquid inlet screen 11 is easily depressed or twisted.

[0090] Further, the hardness of the convex structure 7 is greater than that of the peripheral sealing portion 4; the hard convex structure 7 can increase the support effect on the flow channel. At the same time, the hardness of the convex structure 7 is greater than that of the peripheral sealing portion 4, so that the peripheral sealing portion is more likely to deform during the stacking and extrusion process, thereby not affecting the support effect of the convex structure 7 on the flow channel.

[0091] Embodiment five

[0092] Referring to Figures 11 to 13 Based on the above-mentioned embodiment three, the difference of the present embodiment is that the shortest distance S between the convex structure 7 and the outer edge of the peripheral sealing portion 4 is not greater than 1mm. Limiting the distance between the convex structure 7 and the outer edge of the peripheral sealing portion 4 can effectively prevent the outer edge of the peripheral sealing portion 4 from generating a larger gap, which can allow a certain installation error when stacking the layer structure, facilitate assembly, and at the same time enable the error gap to be completely filled by the outer peripheral rubber portion 3, without affecting the connection effect between the outer peripheral rubber portion 3 and the peripheral sealing portion.

[0093] Embodiment six

[0094] Referring to Figure 14 Based on the above-mentioned embodiment three, the difference of the present embodiment is that the shortest distance S between the convex structure 7 and the outer edge of the peripheral sealing portion 4 is not greater than 1mm. Limiting the distance between the convex structure 7 and the outer edge of the peripheral sealing portion 4 can effectively prevent the outer edge of the peripheral sealing portion 4 from generating a larger gap, which can allow a certain installation error when stacking the layer structure, facilitate assembly, and at the same time enable the error gap to be completely filled by the outer peripheral rubber portion 3, without affecting the connection effect between the outer peripheral rubber portion 3 and the peripheral sealing portion.

[0095] In the present embodiment, compared with the end cap of embodiment one, the end cap is removed, and in the case without the end cap, the liquid inlet unit 1 and the filtrate unit 2 can be directly fixed and peripherally packaged by the outer peripheral rubber portion 3. In use, the membrane package can be used in cooperation with a clamp or other membrane packages.

[0096] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application are within the scope of protection of the present application.

Claims

1. A membrane package, comprising an inlet unit (1) and filtration units (2) disposed on both sides of the inlet unit (1); The liquid inlet unit (1) includes at least a liquid inlet screen (11); The filtrate unit (2) includes a filtrate screen (21) and a filter membrane (22) located between the filtrate screen (21) and the inlet screen (11); It also includes at least an outer peripheral rubber coating (3) surrounding the liquid inlet unit (1); Its features are, It also includes a peripheral sealing part (4), the peripheral sealing part (4) and the outer peripheral rubber coating part (3) are not integrally formed, the peripheral sealing part (4) penetrates through the liquid inlet screen (11) along the thickness direction of the liquid inlet screen (11), and the peripheral sealing part (4) protrudes from the liquid inlet screen (11) on both sides of the liquid inlet screen (11). At least a portion of the edge of the liquid inlet screen (11) protrudes beyond the peripheral sealing portion (4) to form a transition connection area (5) outside the peripheral sealing portion (4), and the adhesive of the outer peripheral coating portion (3) penetrates into the transition connection area (5). The peripheral sealing part (4) is connected end to end along the edge contour of the liquid inlet screen (11).

2. The membrane pack according to claim 1, characterized in that, The thickness H of the peripheral sealing part (4) protruding from the end face of the liquid inlet screen (11) is in the range of 0.1mm≦H≦2mm.

3. The membrane package according to claim 1, characterized in that, It also includes an end cap (6), the filtrate unit (2) having a fixing connection area (20) for fixing the end cap (6), the fixing connection area (20) and the projection of the peripheral sealing part (4) on the plane where the end cap (6) is located at least partially overlap.

4. The membrane package according to claim 3, characterized in that, The end cap (6) has a protruding structure (7) at one end facing the liquid inlet screen (11), and the protruding structure (7) surrounds at least part of the edge region of the filtration unit.

5. A membrane package according to claim 4, characterized in that, The ratio of the thickness H1 of the protruding structure (7) to the thickness H of the peripheral sealing part (4) protruding from the end face of the liquid inlet screen (11) satisfies: 1≦H1 / H≦0.5; and / or; The thickness H1 of the protrusion structure (7) is in the range of 0.1mm≦H1≦1mm.

6. A membrane package according to claim 4, characterized in that, Along the thickness direction of the membrane, the projection of the protrusion structure (7) is located outside the projection of the peripheral sealing part (4).

7. A membrane package according to claim 6, characterized in that, The raised structure is fitted to the outer edge of the peripheral sealing part, or the shortest distance between the raised structure and the outer edge of the peripheral sealing part is no more than 1 mm.

8. A membrane package according to claim 6, characterized in that, Along the contour direction of the peripheral sealing part (4), the ratio of the length L1 of the protruding structure (7) to the length L2 of the peripheral sealing part (4) satisfies: 0.1≦L1 / L2≦0.

4.

9. A membrane package according to claim 4, characterized in that, The hardness of the raised structure (7) is greater than that of the peripheral sealing part (4).

10. A membrane package according to claim 1, characterized in that, The transition connection area (5) is provided around the outside of the peripheral sealing part (4).

11. A membrane package according to claim 10, characterized in that, The width W1 of the transition connection area (5) is in the range of 1mm≦W1≦8mm; And / or, The total width W of the transition connection area (5) and the peripheral sealing part (4) is in the range of 2mm≦W≦10mm.

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