End cover provided with filter screen and suitable for spiral-wound membrane module

Abstract

The utility model discloses a combined end cover with a filter screen suitable for a spiral-wound membrane component, an end cover main body comprises a first inner ring, a first outer ring and first support ribs uniformly distributed between the first inner ring and the first outer ring along the circumferential direction, a water inlet is formed in an area among two adjacent ribs, the first inner ring and the first outer ring, and a water outlet is formed in an area among the first inner ring and the first outer ring. A filter screen is arranged on the water inlet, the filter screen is fixed between the end cover body and a pressing plate through the pressing plate with the structure similar to that of the end cover body, or the filter screen is fixed to the end face of the inner side of the pressing plate in advance, and then the pressing plate is fixed to the end cover body. The filter screen structure is arranged at the water inlet of the end cover, so that when water enters, large particles can be blocked by the filter screen structure and are prevented from entering the water inlet runner of the spiral-wound membrane module, and the anti-pollution and anti-blocking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of rolled membrane components, and in particular to an end cover with a filter screen suitable for the rolled membrane component. Background Art

[0002] Rolled membrane components, also known as spiral rolled membrane components, were successfully developed in the 1960s. They have become a commonly used membrane component form due to their high filling density and low cost. They occupy most of the market share (up to about 75%) in the field of reverse osmosis. They are the most widely used membrane application form in the market and the most important membrane component form in the process of reverse osmosis, ultrafiltration and gas separation. However, the existing rolled membrane components are prone to fouling problems during the water intake process due to large particles in the water. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the background technology and provide an end cover with a filter screen suitable for a roll-type membrane assembly.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] An end cover with a filter screen suitable for a roll-type membrane assembly comprises a first inner ring, a first outer ring and first supporting ribs uniformly distributed between the first inner ring and the first outer ring along a circumferential direction, a water inlet is formed in the area between two adjacent first supporting ribs, the first inner ring and the first outer ring, and a filter screen is arranged on the water inlet.

[0006] The present invention arranges a filter screen at the water inlet so that large particles can be blocked by the filter screen structure when water enters, thereby achieving the effect of anti-fouling and anti-clogging.

[0007] Preferably, the filter screen is fixed to the end faces of the first inner ring, the first outer ring and the first supporting rib by gluing or hot-melt bonding, and can be directly arranged on the end cover by gluing or hot-melt bonding, which is more convenient.

[0008] Preferably, the first inner ring of the end cover extends outward, and the first supporting ribs also extend therewith to form a cone structure; the filter screen is fixed to the surface of the first supporting ribs of the cone structure by gluing or hot-melt bonding.

[0009] The present invention uses a cone structure to make the filter screen area larger, can filter more large particles, and enhance the filtering effect.

[0010] It can be a frustum-shaped structure, which is convenient for standing.

[0011] Preferably, the first outer ring extends outward and the first supporting rib does not extend to form an extension ring, the filter net is arranged inside the extension ring, and a pressure plate similar to the end cover structure is arranged on the outside of the filter net, the pressure plate includes a second inner ring, a second outer ring, and a second supporting rib, and the pressure plate is provided with a water inlet groove identical to the water inlet of the end cover.

[0012] The present invention plugs the filter screen at the outside of the water inlet through a pressing plate, so that when disassembly is required, the plug plate and the extension ring only need to be separated to realize the detachable connection of the filter screen cloth, which is convenient for replacement.

[0013] Preferably, the outer circle of the second outer ring of the pressure plate and the inner circle of the extension ring of the end cover are fixed by threaded connection, so as to facilitate the removal of the pressure plate and replacement of the filter screen.

[0014] Preferably, the outer circle of the second outer ring of the pressing plate and the inner circle of the extension ring are fixed by glue. Alternatively, glue connection can be adopted, which is convenient for installation.

[0015] Preferably, the filter screen is fixed to the inner surface of the pressing plate by gluing or hot-melt bonding; the pressing plate is fixed to the extension ring by gluing. The filter screen can be directly adhered to the pressing plate.

[0016] Preferably, the first outer ring extends outward and the first supporting rib does not extend to form an extension ring; a pressing plate is provided inside the extension ring, and the pressing plate includes a second inner ring, a second outer ring, and a second supporting rib; the second inner ring of the pressing plate extends toward the bottom, and the second supporting rib also extends therewith to form a pressing plate of a cone structure; the filter screen is fixed on the surface of the second supporting rib of the pressing plate of the cone structure by gluing or hot-melt bonding;

[0017] Preferably, the outer circle of the second outer ring of the pressure plate and the inner circle of the extension ring are fixed by threaded connection, so as to facilitate the disassembly and replacement of the filter screen.

[0018] Preferably, the pressing plate and the extension ring are bonded and fixed by glue.

[0019] Preferably, the filter screen is one of a woven screen, a filter cloth, and a porous sheet.

[0020] Preferably, the filter screen is made of non-woven fabric, foam metal, or foam ceramic.

[0021] Preferably, the filter screen is made of a polymer material or a corrosion-resistant austenitic stainless steel material.

[0022] Preferably, the non-woven fabric is a non-woven fabric with a thickness ranging from 10 to 2000 microns, a tensile strength of 50 to 800 kN, and a porosity greater than or equal to 30%, preferably a non-woven fabric with a thickness of 200 to 500 microns, a tensile strength of 100 to 300 kN, and a material of polyethylene terephthalate, polypropylene, or polyethylene; the foam metal is one of foam aluminum, foam copper, and foam nickel, with a thickness of 0.1 to 5 mm, preferably a thickness of 0.3-1.0 mm; the foam ceramic is one of alumina, zirconium oxide, silicon carbide, silicon nitride, and boride foam ceramic, preferably alumina foam ceramic, with a thickness of 0.5 to 5 mm, preferably a thickness of 0.5-1.0 mm.

[0023] Preferably, the filter pore size range of the filter screen is 3 to 200 microns, preferably 5 to 50 microns; the thickness range of the filter screen is 10 to 2000 microns, preferably 30 to 500 microns.

[0024] Preferably, the extension ring and the pressure plate are connected by a detachable structure, the extension ring is provided with a plurality of conical through grooves along the circumferential direction, balls are provided in the conical through grooves, a ball retaining ring is provided on the outer side of the conical through grooves, a compression spring is sleeved on the extension ring, one end of the compression spring is pressed against the bottom of the first outer ring, and the other end is pressed against the ball retaining ring, a hand-held retaining ring is fixedly connected to the outer side wall of the ball retaining ring, an insert ring which can be inserted into the inner wall of the extension ring is formed on the top of the pressure plate, a ball limiting groove is provided on the outer side wall of the insert ring for easy entry of the ball.

[0025] The present invention slides the handheld retaining ring to squeeze the compression spring, causing the ball retaining ring to be displaced and leave the ball, so that the ball can move, and then the insert ring is inserted into the extension ring to first squeeze the ball out of the inner wall of the extension ring, and the ball is blocked by the handheld retaining ring and will not fall out of the tapered through groove, and then the ball is stuck in the ball limiting groove of the insert ring, and then the hand is released, so that the handheld retaining ring and the ball retaining ring are displaced by the elastic force of the compression spring, so that the ball retaining ring blocks the outer wall of the tapered through groove, thereby quickly completing the installation between the extension ring and the pressure plate. The installation is firm, and compared with the threaded method, the thread is not prone to slipping during long-term use. At the same time, it is easy to disassemble and assemble, and convenient for later replacement.

[0026] Preferably, the front end of the insert ring is tapered to facilitate insertion of the extension ring.

[0027] Preferably, the diameter of the tapered through groove increases sequentially from the inner side wall to the outer side wall of the extension ring to prevent the ball from falling from the inner side wall of the extension ring.

[0028] Preferably, a limit stop ring is fixedly connected to a position of the extension ring close to the conical through groove, and the ball stop ring can be blocked by the limit stop ring.

[0029] In summary, the beneficial effects of the utility model are:

[0030] 1. The present invention sets a filter screen at the water inlet of the end cover of the roll-type membrane, so that when water enters, large particles can be blocked by the filter screen structure, reducing the blockage of the water inlet channel of the roll-type membrane by large particles, and extending the cleaning cycle of the membrane; at the same time, it prevents sharp large particles from entering the water inlet channel of the membrane, reduces scratches on the membrane surface, and extends the service life of the membrane;

[0031] 2. The present invention uses a cone structure to make the filter screen larger in area, which can filter more large particles and enhance the filtering effect. The cone-structured end cap with a filter screen is particularly suitable for submerged membrane modules;

[0032] 3. The present invention fixes the filter screen on the outside of the water inlet of the end cover by means of a pressing plate, and the filter screen can be conveniently disassembled and replaced by simply separating the pressing plate from the extension ring of the end cover;

[0033] 4. The present invention slides the handheld retaining ring to squeeze the compression spring, causing the ball retaining ring to be displaced and leave the ball, so that the ball can move, and then the insert ring is inserted into the extension ring to first squeeze the ball out of the inner wall of the extension ring, and the ball is blocked by the handheld retaining ring and will not fall out of the tapered groove, and then the ball is inserted into the ball limiting groove of the insert ring, and then the hand is released, so that the handheld retaining ring and the ball retaining ring are displaced by the elastic force of the compression spring, so that the ball retaining ring blocks the outer wall of the tapered groove, thereby quickly completing the installation between the extension ring and the pressure plate. The installation is firm, and compared with the threaded method, the thread is not prone to slipping during long-term use. At the same time, it is easy to disassemble and assemble, and convenient for later replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of Embodiment 1 of the present utility model;

[0035] Figure 2 It is a schematic diagram of Embodiment 2 of the present utility model;

[0036] Figure 3 It is a schematic diagram of Embodiment 3 of the present utility model;

[0037] Figure 4 is a schematic diagram of a pressing plate of Embodiment 3 of the present utility model;

[0038] Figure 5 It is a schematic diagram of Embodiment 6 of the present utility model;

[0039] Figure 6 It is a schematic diagram of the detachable structure of Example 8 of the utility model;

[0040] Figure 7 This utility model Figure 6An enlarged schematic diagram of point A;

[0041] Figure 8 It is a cross-sectional schematic diagram of Example 8 of the utility model when the insert ring is just inserted into the extension ring. DETAILED DESCRIPTION

[0042] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0043] The present invention will be described in detail below with reference to the accompanying drawings. Example 1

[0044] like Figure 1 As shown, an end cover with a filter screen suitable for a roll-type membrane assembly includes a first inner ring 1, a first outer ring 2 and first supporting ribs 3 uniformly distributed between the first inner ring 1 and the first outer ring 2 along the circumferential direction, and a water inlet 20 is formed in the area between two adjacent first supporting ribs 3, the first inner ring 1 and the first outer ring 2. A filter screen 4 is arranged on the water inlet 20, and the filter screen 4 is fixed to the end faces of the first inner ring 1, the first outer ring 2 and the first supporting rib 3 by gluing or hot-melt bonding.

[0045] The filter screen 4 is a kind of woven screen, filter cloth, or porous sheet.

[0046] The filter screen 4 is a non-woven fabric, foam metal, or foam ceramic.

[0047] The filter screen 4 is made of a polymer material or a corrosion-resistant austenitic stainless steel material.

[0048] The non-woven fabric has a thickness ranging from 10 to 2000 microns, a tensile strength of 50 to 800 kN, and a porosity greater than or equal to 30%, preferably a non-woven fabric with a thickness of 200 to 500 microns, a tensile strength of 100 to 300 kN, and a material of polyethylene terephthalate, polypropylene, or polyethylene; the foam metal is one of foam aluminum, foam copper, and foam nickel, with a thickness of 0.1 to 5 mm, preferably a thickness of 0.3-1.0 mm; the foam ceramic is one of alumina, zirconium oxide, silicon carbide, silicon nitride, and boride foam ceramic, preferably alumina foam ceramic, with a thickness of 0.5 to 5 mm, preferably a thickness of 0.5-1.0 mm.

[0049] The filter pore size of the filter screen 4 ranges from 3 to 200 microns, preferably from 5 to 50 microns; the thickness of the filter screen 4 ranges from 10 to 2000 microns, preferably from 30 to 500 microns. Example 2

[0050] like Figure 2 As shown, different from Example 1, the first inner ring 1 of the end cover extends outward, and the first supporting rib 3 also extends therewith to form a cone structure; the filter screen 4 is fixed to the surface of the first supporting rib 3 of the cone structure by gluing or hot-melt bonding. Example 3

[0051] like Figure 3-4 As shown, different from Example 1, the first outer ring 2 extends outward and the first supporting rib 3 does not extend to form an extension ring 6, the extension ring 6 is provided with the filter screen 4, the outside of the filter screen 4 is provided with a pressure plate 7 similar to the end cover structure, the pressure plate 7 includes a second inner ring 71, a second outer ring 72, and a second supporting rib 73, the pressure plate 7 is provided with a water inlet groove 61 which is the same as the water inlet 20, the outer circle of the second outer ring 72 of the pressure plate 7 and the inner circle of the extension ring 6 of the end cover are fixed by threaded connection, which is convenient for removing the pressure plate and replacing the filter screen 4. Example 4

[0052] Different from the third embodiment, the outer circle of the second outer ring 72 of the pressing plate 7 and the inner circle of the extension ring 6 are fixed by gluing. Example 5

[0053] Different from the third embodiment, the filter screen 4 is fixed to the inner surface of the pressing plate 7 by gluing or hot-melt bonding; the pressing plate 7 is fixed to the extension ring 6 by gluing. Example 6

[0054] like Figure 5 As shown, different from Example 1, the first outer ring 2 extends outward and the first supporting rib 3 does not extend to form an extension ring 6; a pressure plate 7 is provided inside the extension ring, and the pressure plate 7 includes a second inner ring 71, a second outer ring 72, and a second supporting rib 73. The second inner ring 71 of the pressure plate 7 extends toward the bottom, and the second supporting rib 73 also extends therewith to form a pressure plate with a cone structure; the filter screen 4 is fixed to the surface of the second supporting rib 73 of the pressure plate 7 of the cone structure by glue bonding or hot-melt bonding; the outer circle of the second outer ring 72 of the pressure plate and the inner circle of the extension ring 6 are fixed by threaded connection, so as to facilitate the disassembly and replacement of the filter screen 4. Example 7

[0055] Different from the sixth embodiment, the pressing plate 7 and the extension ring 6 are fixed by gluing. Example 8

[0056] like Figure 5-8As shown, different from Example 6, the extension ring 6 and the pressure plate 7 are connected by a detachable structure 5, the extension ring 6 is provided with a plurality of tapered through grooves 52 along the circumferential direction, the tapered through grooves 52 are provided with balls 53, the outer side of the tapered through grooves 52 is provided with a ball retaining ring 54, a compression spring 55 is sleeved on the extension ring 6, one end of the compression spring 55 is pressed against the bottom of the first outer ring 2, and the other end is pressed against the ball retaining ring 54, the outer side wall of the ball retaining ring 54 is fixedly connected with a hand-held retaining ring 56, the top of the pressure plate 7 is formed with an insert ring 57 which can be inserted into the inner wall of the extension ring 6, the outer side wall of the insert ring 57 is provided with a ball limiting groove 58 for easy falling of the ball, the front end of the insert ring 57 is tapered, the diameter of the tapered through groove 52 increases successively along the direction from the inner side wall to the outer side wall of the extension ring 6, and a limiting retaining ring 59 is fixedly connected to the position of the extension ring 6 close to the tapered through groove 52.

[0057] Working principle: When the present invention is used, Figure 5-8 As shown, the hand-held retaining ring 56 is slid to squeeze the compression spring 55, so that the ball retaining ring 54 is displaced away from the ball, so that the ball 53 can move, and then the insert ring 57 is inserted into the extension ring 51, and the ball 53 is first squeezed out of the inner wall of the extension ring 51. The ball 53 is blocked by the hand-held retaining ring 56 and will not fall out of the tapered groove 52. Then the ball 53 is inserted into the ball limiting groove 58 of the insert ring 57, and then the hand is released, so that the hand-held retaining ring 56 and the ball retaining ring 54 are displaced by the elastic force of the compression spring 55, so that the ball retaining ring 54 blocks the outer wall of the tapered groove 52, thereby quickly completing the installation between the extension ring and the pressure plate. The installation is firm, and compared with the threaded method, the thread is not prone to slippage during long-term use. At the same time, it is easy to disassemble and assemble, and it is convenient for later replacement.

Claims

1. An end cap with a filter screen suitable for a spiral membrane module, It is characterized in that The invention comprises a first inner ring (1), a first outer ring (2), and first supporting ribs (3) uniformly distributed between the first inner ring (1) and the first outer ring (2) along a circumferential direction, wherein a water inlet (20) is formed in an area between two adjacent first supporting ribs (3), the first inner ring (1), and the first outer ring (2), and a filter screen (4) is arranged on the water inlet (20).

2. An end cap with a filter screen suitable for a spiral membrane module according to claim 1, It is characterized in that The filter screen (4) is fixed to the end surfaces of the first inner ring (1), the first outer ring (2) and the first supporting rib (3) by gluing or hot-melt bonding.

3. The end cap with filter screen suitable for spiral membrane module according to claim 1, It is characterized in that The first inner ring (1) of the end cover extends outwards, and the first supporting rib (3) also extends therewith to form a cone structure; the filter screen (4) is fixed to the surface of the first supporting rib (3) of the cone structure by gluing or hot-melt bonding.

4. The end cap with filter screen suitable for spiral membrane module according to claim 1, It is characterized in that The first outer ring (2) extends outwards and the first supporting ribs (3) do not extend, forming an extension ring (6); the filter screen (4) is arranged inside the extension ring (6); a pressure plate (7) having a structure similar to that of the end cover is arranged outside the filter screen (4); the pressure plate (7) comprises a second inner ring (71), a second outer ring (72), and second supporting ribs (73); and a water inlet groove (61) identical to the water inlet (20) of the end cover is arranged on the pressure plate (7).

5. An end cap with a filter screen suitable for a spiral membrane module according to claim 4, It is characterized in that The outer circle of the second outer ring (72) of the pressing plate (7) and the inner circle of the extension ring (6) of the end cover are fixedly connected by threads.

6. An end cap with a filter screen suitable for a spiral membrane module according to claim 4, It is characterized in that The outer circle of the second outer ring (72) of the pressing plate (7) and the inner circle of the extension ring (6) of the end cover are bonded and fixed by glue.

7. An end cap with a filter screen suitable for a spiral membrane module according to claim 4, It is characterized in that The filter screen (4) is fixed to the inner surface of the pressing plate (7) by gluing or hot-melt bonding; the pressing plate (7) is fixed to the extension ring (6) by gluing.

8. The end cap with filter screen suitable for spiral membrane module according to claim 1, It is characterized in that The first outer ring (2) extends outwards and the first supporting rib (3) does not extend, thereby forming an extension ring (6); a pressure plate (7) is provided inside the extension ring, and the pressure plate (7) comprises a second inner ring (71), a second outer ring (72), and a second supporting rib (73); the second inner ring (71) of the pressure plate (7) extends toward the bottom, and the second supporting rib (73) also extends therewith, thereby forming a pressure plate with a cone structure; the filter screen (4) is fixed on the surface of the second supporting rib (73) of the pressure plate (7) with the cone structure; the outer circle of the second outer ring (72) of the pressure plate and the inner circle of the extension ring (6) are fixed by threaded connection.

9. An end cap with a filter screen suitable for a spiral membrane module according to claim 8, It is characterized in that The extension ring (6) and the pressure plate (7) are connected by a detachable structure (5), the extension ring (6) is provided with a plurality of conical through grooves (52) along the circumferential direction, a ball (53) is provided in the conical through groove (52), a ball retaining ring (54) is provided on the outer side of the conical through groove (52), and a compression spring (55) is sleeved on the extension ring (6), one end of the compression spring (55) is pressed against the bottom of the first outer ring (2), and the other end is pressed against the bottom of the first outer ring (2). A ball retaining ring (54), the outer wall of which is fixedly connected to a hand-held retaining ring (56), the top of the pressure plate (7) is formed with an insert ring (57) which can be inserted into the inner wall of the extension ring (6), the outer wall of the insert ring (57) is provided with a ball limiting groove (58) for facilitating the falling of the ball, the front end of the insert ring (57) is conical, and the diameter of the conical through groove (52) increases in sequence along the direction from the inner wall to the outer wall of the extension ring (6).

10. An end cap with a filter screen suitable for a spiral membrane module according to claim 9, It is characterized in that The extended ring (6) is fixedly connected to a limit stop ring (59) at a position close to the tapered through groove (52).

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