Filtering membrane bag with cover plate for sealing
By providing first and second sealing rings with different protruding heights on the cover plate, the problem of insufficient sealing properties of the plastic cover plate and the filter membrane bag is solved, and efficient sealing effect and protection of the membrane bag body are achieved.
Patent Information
- Application Number
- CN202422135783.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the prior art, the sealing property between the plastic cover plate and the filter membrane pack is insufficient, resulting in a risk of liquid inlet and filtrate communication, affecting the filtration quality.
The first sealing ring and the second sealing ring are provided on the cover plate, and the protruding heights of the two are different. Through different contact sequences and structural designs, effective sealing of the film cover body is achieved, and the compression force is reduced to avoid deformation of the film cover.
The sealing of the cover plate and the membrane bag body is improved, the liquid inlet and filtrate is prevented from mixing, the filtration efficiency is ensured, and the risk of damage to the membrane bag body is reduced, and the assembly accuracy and sealing strength are improved.
Smart Images
Figure CN223184375U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of filter filtration, and particularly relates to a filter membrane package with a cover plate seal. Background Art
[0002] A filter membrane package is usually formed by stacking one or more groups of liquid inlet units, filter units and other units to form a membrane package main structure. In order to prevent damage to the filter membrane on the filter unit during transportation or use, cover plates are usually arranged on one or both sides of the membrane package main body, and then the whole filter membrane package is formed by wrapping a rubber part on the periphery. For the plastic cover plate of the prior art, the cover plate material is relatively hard, and it is difficult to ensure complete fitting when directly approaching the liquid inlet unit or the filter unit, there is a risk of liquid inlet and filtrate being connected, and the sealing performance of the filter membrane package cannot be guaranteed, which will directly affect the filtration quality. Content of the Utility Model
[0003] The utility model provides a filter membrane package with a cover plate seal, which improves the sealing performance of the cover plate to the membrane package main body and reduces the risk of liquid inlet and filtrate flowing through.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A filter membrane package with a cover plate seal includes a membrane package main body and at least one cover plate. The periphery of the membrane package main body and the cover plate is wrapped with a rubber part. The membrane package main body is provided with a membrane package liquid inlet, a membrane package return port and a membrane package liquid outlet. The feature is that the cover plate is arranged on at least one side of the membrane package main body. The cover plate is provided with a cover plate liquid inlet corresponding to the membrane package liquid inlet, a cover plate return port corresponding to the membrane package return port and a cover plate liquid outlet corresponding to the membrane package liquid outlet. The cover plate is provided with a first sealing ring at the cover plate liquid inlet and the cover plate return port respectively, and the cover plate is provided with a second sealing ring at the cover plate liquid outlet. Both the first sealing ring and the second sealing ring protrude from the side of the cover plate facing the membrane package main body, and the protruding heights of the first sealing ring and the second sealing ring are different. When the whole cover plate is pressed to seal with the membrane package main body, due to the different protruding heights of the first sealing ring and the second sealing ring, the one with the relatively larger protruding height among the first sealing ring or the second sealing ring will first contact with the membrane package main body, so as to seal the circumferences of the membrane package liquid inlet and the membrane package return port, or the circumference of the membrane package liquid outlet. Then the sealing ring with the smaller protruding height will contact with the membrane package main body again for sealing. In this way, it can prevent the liquid inlet and the filtrate from communicating and flowing between the cover plate and the membrane package main body, ensure a certain gradient of sealing effect, and reduce the pressing force required between the cover plate and the membrane package main body, so as to avoid deformation or even rupture of the membrane package main body and is beneficial to maintaining the integrity of the membrane package main body.
[0006] Preferably, the difference in the protruding heights of the first sealing ring and the second sealing ring is 0.3 - 1.5 mm. In this way, when an external pressure acts on the cover plate, the sealing ring with the larger protruding height among the first sealing ring and the second sealing ring first contacts the membrane package body. Before the sealing ring with the smaller protruding height contacts the membrane package body, the pressure causes the thickness of the sealing ring with the larger protruding height to become thinner. The first sealing ring and the second sealing ring have a suitable difference in protruding height, so that the contact area between the sealing ring with the larger protruding height and the membrane package body is reasonable, and the pressure of the cover plate on the membrane package body is appropriate, preventing damage to the membrane package body.
[0007] Preferably, the membrane package body is provided with a filtering unit adjacent to the cover plate, and the protruding height of the first sealing ring is greater than that of the second sealing ring. By setting the first sealing ring with a larger protruding height, the sealing performance at the membrane package liquid inlet and the membrane package return port of the filtering unit adjacent to the cover plate can be further ensured. At the same time, it can also prevent the problem that the membrane package liquid inlet, the membrane package return hole and the membrane package liquid outlet are connected due to the cover plate made of a harder material.
[0008] Preferably, the filtering unit includes a filtering screen and filtering membranes on both sides of the filtering screen.
[0009] Preferably, the filtering unit includes a filtering screen, a filtering membrane inside the filtering screen and a termination layer outside the filtering screen. When the outermost side of the membrane package body is set as the filtering unit, by replacing the outer filtering membrane with an impermeable termination layer, the effect of preventing the filtrate from contacting the cover plate can be achieved, and the usage amount of the filtering membrane can be saved, reducing the production cost.
[0010] Preferably, the membrane package body is provided with a liquid inlet screen adjacent to the cover plate, and the protruding height of the first sealing ring is less than that of the second sealing ring. The membrane package liquid outlet of the liquid inlet screen needs to be sealed with the liquid inlet screen. Usually, a sealing layer is formed by welding or adhesive curing to prevent the filtrate from mixing with the inlet liquid. By setting the second sealing ring with a larger protruding height to abut and seal with the sealing layer on the liquid inlet screen, the sealing performance between the cover plate and the membrane package body is improved, preventing the inlet liquid from mixing with the filtrate and affecting the filtering effect.
[0011] Preferably, the cover plate includes at least one main cover plate and at least one inner cover plate located inside the main cover plate. The first sealing ring is shared by the corresponding cover plate liquid inlet and the cover plate return port of the main cover plate and the inner cover plate, and the second sealing ring is shared by the corresponding cover plate liquid outlet of the main cover plate and the inner cover plate. When the cover plate adopts the combination of the main cover plate and the inner cover plate, the first sealing ring and the second sealing ring can be used to position multiple main cover plates and inner cover plates, thus facilitating the assembly of the cover plate and the membrane package body.
[0012] Preferably, the first sealing ring and the second sealing ring are made of one of PE, PA, rubber, PMMA, epoxy resin, and PP.
[0013] Preferably, the first sealing ring includes a first ring for positioning with the cover plate. A first protrusion is provided on one side of the first ring close to the membrane package body, and the width of the first ring is 2 - 8 mm; the second sealing ring includes a second ring for positioning with the cover plate. A second protrusion is provided on one side of the second ring close to the membrane package body, and the width of the second ring is 2 - 8 mm. By providing the first protrusion and the second protrusion, the sealing strength between the first sealing ring and the membrane package body and between the second sealing ring and the membrane package body is improved.
[0014] Preferably, the width of the connection between the first protrusion and the first ring is 1 - 4 mm, the height of the first protrusion is 0.3 - 1.5 mm, and the width of the connection between the second protrusion and the second ring is 0.1 - 0.5 mm; and / or, the width of the connection between the first protrusion and the first ring is 0.1 - 0.5 mm, the width of the connection between the second protrusion and the second ring is 1 - 4 mm, and the height of the second protrusion is 0.3 - 1.5 mm.
[0015] Preferably, the first protrusion and / or the second protrusion is in a conical shape with a cross-sectional width decreasing from inside to outside or in a sealing linear shape surrounding the inner circle of the corresponding first ring or the inner circle of the second ring.
[0016] The beneficial effects of the present utility model are as follows: (1) By providing the corresponding first sealing ring and second sealing ring on the cover plate, the sealing performance of the cover plate to the membrane package body is improved, effectively preventing the mixing of the feed liquid and the filtrate, and ensuring the filtration efficiency; (2) The protruding heights of the first sealing ring and the second sealing ring are different. While ensuring the sealing performance, the risk of damage to the membrane package body by the cover plate is reduced, ensuring the integrity of the membrane package body; (3) The first sealing ring and the second sealing ring can reduce the positioning difficulty of the cover plate, ensuring the assembly accuracy of the cover plate and the membrane package body; (4) The first sealing ring and the second sealing ring are provided with corresponding first protrusions and second protrusions, effectively improving the sealing strength of the first sealing ring and the second sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural view of the present utility model;
[0018] Figure 2 is a front view of the cover plate of the present utility model;
[0019] Figure 3 is Figure 2 a partial cross-sectional view of the cover plate at A - A in
[0020] Figure 4 is a cross-sectional view of Embodiment 1 of the present utility model;
[0021] Figure 5 is a cross-sectional view of Embodiment 2 of the present utility model;
[0022] Figure 6 is a cross-sectional view of Embodiment 3 of the present utility model;
[0023] Figure 7 is a cross-sectional view of Embodiment 4 of the present utility model.
[0024] In the figure: cover plate 1, main cover plate 1a, inner cover plate 1b, cover plate liquid outlet 2, second sealing ring 3, second ring 3a, second protrusion 3b, cover plate liquid inlet 4, first sealing ring 5, first protrusion 5a, first ring 5b, rubber-coated part 6, cover plate return port 7, membrane package body 8, filtration unit 81, filter membrane 81a, filter screen 81b, termination layer 81c, inlet screen 82, membrane package liquid inlet 8a, membrane package liquid outlet 8b. Detailed implementation manners
[0025] The following further describes the present utility model in conjunction with the accompanying drawings and specific implementation manners.
[0026] Embodiment 1
[0027] As Figure 1 shown in the embodiment, a filter membrane package with a cover plate seal includes a membrane package body 8. Cover plates 1 are provided on both sides of the membrane package body 8. A rubber-coated part 6 is wrapped around the outer periphery of the membrane package body 8 and the cover plates 1. The membrane package body 8 is provided with a membrane package liquid inlet 8a, a membrane package return port, and a membrane package liquid outlet 8b. The membrane package liquid inlets 8a are arranged on one side of the membrane package body 8, the membrane package return ports are arranged on the other side of the membrane package body 8, and the membrane package liquid outlets 8b are arranged between adjacent membrane package liquid inlets 8a or between membrane package return ports, so as to achieve the smooth flow of the feed liquid and the filtrate. As shown in Figure 2 shown, the cover plate 1 is provided with a cover plate liquid inlet 4 corresponding to the membrane package liquid inlet 8a, a cover plate return port 7 corresponding to the membrane package return port, and a cover plate liquid outlet 2 corresponding to the membrane package liquid outlet 8b. The cover plate 1 is provided with a first sealing ring 5 at the cover plate liquid inlet 4 and the cover plate return port 7 respectively, and the cover plate 1 is provided with a second sealing ring 3 at the cover plate liquid outlet 2. The first sealing ring 5 and the second sealing ring 3 are made of one of PE, PA, rubber, PMMA, epoxy resin, and PP, and the most suitable material can be selected according to different usage scenarios, so as to meet the chemical compatibility performance of the feed liquid.
[0028] As Figure 3 , Figure 4 shown, both the first sealing ring 5 and the second sealing ring 3 protrude from the side of the cover plate 1 facing the membrane package body 8. The protruding heights of the first sealing ring 5 and the second sealing ring 3 are different, and the difference in the protruding heights of the first sealing ring 5 and the second sealing ring 3 is 0.3 - 1.5 mm. AsFigure 4 As shown, the membrane package main body 8 is formed by stacking multiple filter units 81 and a liquid inlet screen 82. In this embodiment, the membrane package main body 8 has a filter unit 81 adjacent to the cover plate 1, that is, the outermost side of the membrane package main body 8 is the filter unit 81. The filter unit 81 includes a filter screen 81b and filter membranes 81a on both sides of the filter screen 81b. Therefore, the protruding height of the first sealing ring 5 is set to be greater than the protruding height of the second sealing ring 3. With the relatively large protruding height of the first sealing ring 5, during the process of pressing and sealing the cover plate 1 and the membrane package main body 8, the first sealing ring 5 will first come into contact with the membrane package main body 8. After the first sealing ring 5 is pressed and sealed with the membrane package main body 8, the circumferential sealing of the membrane package liquid inlet 8a and the membrane package return port is achieved, and the feed liquid cannot reach the area between the cover plate 1 and the membrane package main body 8 from the position of the membrane package liquid inlet 8a.
[0029] As Figure 3 、 Figure 4 As shown, the first sealing ring 5 includes a first ring 5b positioned with the cover plate 1. The width of the first ring 5b is 2 - 8 mm. On the side of the first ring 5b close to the membrane package main body 8, there is a first protrusion 5a, forming a multi-stage structure. The first protrusion 5a is in a conical shape with a cross-sectional width decreasing from the inside to the outside. The width of the connection between the first protrusion 5a and the first ring 5b is 1 - 4 mm, and the height of the first protrusion 5a is 0.3 - 1.5 mm.
[0030] The second sealing ring 3 includes a second ring 3a positioned with the cover plate 1. The width of the second ring 3a is 2 - 8 mm. On the side of the second ring 3a close to the membrane package main body 8, there is a second protrusion 3b, forming a multi-stage structure. The second protrusion 3b is in a sealing linear shape surrounding the inner circle of the corresponding second ring 3a. The width of the connection between the second protrusion 3b and the second ring 3a is 0.1 - 0.5 mm.
[0031] Under the action of pressure, the first ring 5b of the first sealing ring 5 is continuously compressed and its thickness is thinned. At the same time, the first protrusion 5a located inside the first ring 5b can further improve the sealing strength. After the first ring 5b is compressed, its diameter will further increase, making the contact area between the first sealing ring 5 and the membrane package main body 8 further increase, effectively preventing the mixing of the feed liquid and the filtrate. When the compression reaches a thickness that just compensates for the distance of the protruding height difference of the second sealing ring 3, the second sealing ring 3 starts to contact the main body structure. The second protrusion 3b is a very narrow sealing linear shape, and a relatively large pressure can be achieved even under a small pressing force, ensuring the sealing effect.
[0032] Embodiment 2
[0033] The difference between Embodiment 2 and Embodiment 1 is that, as Figure 5As shown, the outermost filter unit 81 of the membrane package main body 8 includes a filter screen 81b, a filter membrane 81a located inside the filter screen 81b, and a termination layer 81c located outside the filter screen 81b. Since the outermost part of the membrane package main body 8 is the filter unit 81 and no other liquid inlet screens 82 are provided outside this filter unit 81, the outside of the filter screen 81b of this filter unit 81 can be set as the termination layer 81c. The termination layer 81c is made of a liquid-impermeable material, which can block the filtrate from flowing towards the cover plate 1 and achieve the effect of preventing the filtrate from contacting the cover plate 1.
[0034] Example 3
[0035] The difference between Example 3 and Example 1 is that, as Figure 6 shown, the membrane package main body 8 is provided with a liquid inlet screen 82 adjacent to the cover plate 1, that is, the outermost part of the membrane package main body 8 is the liquid inlet screen 82. At this time, the protruding height of the first sealing ring 5 is set to be less than the protruding height of the second sealing ring 3. In this embodiment, the first protrusion 5a is in a sealing linear shape surrounding the inner circle of the corresponding second ring 3a, and the second protrusion 3b is in a conical shape with a cross-sectional width decreasing from inside to outside. Since the liquid outlet 8b of the membrane package of the liquid inlet screen 82 itself needs to be sealed with the liquid inlet screen 82, a sealing layer is usually formed by welding or adhesive curing to prevent the filtrate from mixing with the inlet liquid. By setting the second sealing ring 3 with a larger protruding height to abut and seal with the sealing layer on the liquid inlet screen 82, the sealing performance between the cover plate 1 and the membrane package main body 8 is improved, preventing the inlet liquid from mixing with the filtrate, and thus ensuring the filtration efficiency.
[0036] Example 4
[0037] The difference between Example 4 and Example 3 is that, as Figure 7 shown, the cover plate 1 includes a main cover plate 1a and two inner cover plates 1b located inside the main cover plate 1a. The cover plate liquid inlet 4 and the cover plate return port 7 corresponding to the main cover plate 1a and the inner cover plates 1b share the first sealing ring 5 respectively, and the cover plate liquid outlet 2 corresponding to the main cover plate 1a and the inner cover plates 1b share the second sealing ring 3. The first sealing ring 5 and the second sealing ring 3 contact the inner walls of the corresponding cover plate liquid inlet 4, cover plate return port 7 or cover plate liquid outlet 2 respectively, and the main cover plate 1a and the inner cover plates 1b position the axials of the first sealing ring 5 and the second sealing ring 3, so as to achieve the pre-assembly between the main cover plate 1a and the inner cover plates 1b, which is beneficial to ensuring the assembly accuracy between the cover plate 1 and the membrane package main body 8.
[0038] The above has introduced the embodiments of the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A filter membrane package with a cover plate seal, comprising a membrane package body (8) and at least one cover plate (1), wherein the outer peripheries of the membrane package body (8) and the cover plate (1) are covered with a rubber coating (6), and the membrane package body (8) is provided with a membrane package liquid inlet (8a), a membrane package reflux port and a membrane package liquid outlet (8b), wherein: The cover plate (1) is arranged on at least one side of the membrane package main body (8), and the cover plate (1) is provided with a cover plate liquid inlet (4) corresponding to the membrane package liquid inlet (8a), a cover plate reflux port (7) corresponding to the membrane package reflux port, and a cover plate liquid outlet (2) corresponding to the membrane package liquid outlet (8b). The cover plate (1) is provided with a first sealing ring (5) at the cover plate liquid inlet (4) and the cover plate reflux port (7), respectively, and the cover plate (1) is provided with a second sealing ring (3) at the cover plate liquid outlet (2). The first sealing ring (5) and the second sealing ring (3) both protrude from the side of the cover plate (1) facing the membrane package main body (8), and the protruding heights of the first sealing ring (5) and the second sealing ring (3) are different.
2. A filter membrane package with a cover seal according to claim 1, characterized in that: The difference in protrusion height between the first sealing ring (5) and the second sealing ring (3) is 0.3-1.5 mm.
3. The filter membrane package with a cover seal according to claim 1, characterized in that: The membrane package body (8) is provided with a filter unit (81) adjacent to the cover plate (1), and the protruding height of the first sealing ring (5) is greater than the protruding height of the second sealing ring (3).
4. A filter membrane package with a cover seal according to claim 3, characterized in that: The filtration unit (81) comprises a filtration screen (81b) and filtration membranes (81a) located on both sides of the filtration screen (81b).
5. The filter membrane package with a cover seal according to claim 3, characterized in that: The filtration unit (81) comprises a filtration screen (81b), a filtration membrane (81a) located inside the filtration screen (81b), and a termination layer (81c) located outside the filtration screen (81b).
6. The filter membrane package with a cover seal according to claim 1, characterized in that: The membrane package body (8) is provided with a liquid inlet screen (82) adjacent to the cover plate (1), and the protruding height of the first sealing ring (5) is smaller than the protruding height of the second sealing ring (3).
7. The filter membrane package with a cover seal according to claim 1, characterized in that: The cover plate (1) comprises at least one main cover plate (1a) and at least one inner cover plate (1b) located inside the main cover plate (1a); the cover plate liquid inlet (4) and the cover plate return port (7) corresponding to the main cover plate (1a) and the inner cover plate (1b) respectively share a first sealing ring (5); the cover plate liquid outlet (2) corresponding to the main cover plate (1a) and the inner cover plate (1b) share a second sealing ring (3); the main cover plate (1a) and the inner cover plate (1b) position the first sealing ring (5) and the second sealing ring (3) in the axial direction.
8. The filter membrane package with a cover seal according to claim 1, characterized in that: The first sealing ring (5) and the second sealing ring (3) are made of one of PE, PA, rubber, PMMA, epoxy resin and PP.
9. A filter membrane package with a cover seal according to any one of claims 1 to 8, characterized in that: The first sealing ring (5) includes a first circular ring (5b) positioned with the cover plate (1), a first protrusion (5a) is provided on the side of the first circular ring (5b) close to the membrane package body (8), and the width of the first circular ring (5b) is 2-8 mm; the second sealing ring (3) includes a second circular ring (3a) positioned with the cover plate (1), a second protrusion (3b) is provided on the side of the second circular ring (3a) close to the membrane package body (8), and the width of the second circular ring (3a) is 2-8 mm.
10. The filter membrane package with cover seal according to claim 9, characterized in that: The width of the connection between the first protrusion (5a) and the first circular ring (5b) is 1-4 mm, the height of the first protrusion (5a) is 0.3-1.5 mm, and the width of the connection between the second protrusion (3b) and the second circular ring (3a) is 0.1-0.5 mm; and / or the width of the connection between the first protrusion (5a) and the first circular ring (5b) is 0.1-0.5 mm, the width of the connection between the second protrusion (3b) and the second circular ring (3a) is 1-4 mm, and the height of the second protrusion (3b) is 0.3-1.5 mm.
11. The filter membrane package with cover seal according to claim 10, characterized in that: The first protrusion (5a) and / or the second protrusion (3b) are in the shape of a cone with a cross-sectional width decreasing from the inside to the outside, or in the shape of a sealing line surrounding the inner ring of the corresponding first circular ring (5b) or the inner ring of the second circular ring (3a).