Column-structured spiral-wound membrane assembly

Abstract

The utility model discloses a spiral-wound membrane component with a column structure, which comprises a column shell body and an upper clamping sleeve, the upper clamping sleeve is arranged at the top end of the column shell body, an upper end cover is arranged at the top end of the upper clamping sleeve, a lower clamping sleeve is arranged at the bottom end of the column shell body, and a lower end cover is arranged at the bottom end of the lower clamping sleeve. A first external thread is arranged on the outer wall of the cylinder shell body on one side of the upper clamping sleeve, a first internal thread is arranged in the upper clamping sleeve on one side of the first external thread, and the first internal thread is in threaded connection with the first external thread. According to the spiral-wound membrane assembly, convenient threaded rotary type fixing and movable type moving-out are achieved, threaded compression type assembly of the spiral-wound membrane assembly is facilitated, recycling of the cylinder shell is facilitated, modular assembly and use of single parts are facilitated, disassembly and replacement of the single parts after damage are facilitated, and the later maintenance cost is reduced; and the replacement convenience of the spiral-wound membrane is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rolled membrane components, in particular to a rolled membrane component with a columnar structure. Background Art

[0002] Ultrafiltration membrane is a commonly used filtration method in water treatment. It is used to remove suspended matter, microorganisms and colloids in municipal, industrial and domestic water bodies. Usually, the ultrafiltration membrane is designed as a columnar structure, and the internal membrane adopts hollow fiber membrane filaments. Under the action of pressure, water is filtered through the membrane filaments to produce product water for discharge. The diameter of the hollow fiber membrane structure is usually less than 2mm, and the mechanical strength is poor. During the application process, it is easy for mechanical force to break the membrane filament, causing filtration failure and deterioration of product water quality. In hollow fiber ultrafiltration products, the membrane filaments and the membrane shell are sealed by glue curing. When the membrane filaments fail, they need to be discarded together with the membrane shell. The membrane shell cannot be reused and the cost is relatively high.

[0003] For example, a roll-type membrane assembly disclosed in the authorization announcement number CN215463327U includes a membrane and a permeate side separator arranged on the permeate side of the membrane, wherein the permeate side separator is a polypropylene hard elastic membrane. The network pore structure of the polypropylene polymer hard elastic membrane provides a wide flow channel space for the permeate passing through the membrane to enter the permeate side, effectively improving the water flux in the membrane filtration process, and the polypropylene polymer hard elastic membrane has a relatively irregular network pore structure, which provides a wider flow channel space for the permeate passing through the membrane to enter the permeate side, thereby reducing the system operating pressure, extending the service life of the membrane assembly, and contributing to energy saving and consumption reduction of the roll-type membrane assembly. At the same time, the polypropylene polymer hard elastic membrane provides an effective backing for the membrane in the roll-type membrane assembly, protecting the membrane from external force damage;

[0004] Although the utility model has effectively improved the overall performance of the rolled membrane assembly from the aspect of membrane assembly manufacturing technology, it has not solved the problems that the existing rolled membrane assembly is not conducive to convenient threaded rotation fixing and movable removal during use, is not conducive to threaded compression assembly of the rolled membrane assembly, is not conducive to the recycling of the column shell, and most of them are assembled and used with an integral structure, which is not conducive to disassembly and replacement of individual parts after damage, greatly affecting the cost of subsequent maintenance and the convenience of replacing the rolled membrane. Utility Model Content

[0005] The purpose of the utility model is to provide a roll-up membrane assembly with a columnar structure to solve the problems in the above-mentioned background technology that the roll-up membrane assembly is not convenient for convenient threaded rotation fixing and movable removal, is not conducive to threaded compression assembly of the roll-up membrane assembly, is not conducive to the recycling of the column shell, and is mostly assembled and used with an integral structure, which is not conducive to disassembly and replacement of individual parts after damage, affecting the cost of subsequent maintenance and the convenience of replacing the roll-up membrane.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a columnar structured rolled membrane assembly, comprising a columnar shell body and an upper ferrule, an upper ferrule is arranged at the top end of the columnar shell body, an upper end cover is arranged at the top end of the upper ferrule, a lower ferrule is arranged at the bottom end of the columnar shell body, a lower end cover is arranged at the bottom end of the lower ferrule, a first external thread is arranged on the outer wall of the columnar shell body on one side of the upper ferrule, a first internal thread is arranged inside the upper ferrule on one side of the first external thread, and the first internal thread is threadedly connected to the first external thread, a rolled membrane body is arranged inside the columnar shell body on one side of the first external thread, and a There is a third external thread, and an upper sealing ring is provided on the surface of the upper ferrule on one side of the third external thread, and a fourth internal thread is provided inside the upper end cover on one side of the third external thread, and the fourth internal thread is threadedly connected to the third external thread, a side water inlet pipe is provided on the outer wall of the upper end cover, and the side water inlet pipe extends to the interior of the upper end cover, an upper internal thread sleeve is provided inside the upper end cover above the side water inlet pipe, and a plurality of groups of upper grip plates with equal intervals are installed on the outer wall of the upper internal thread sleeve, and the upper grip plates are all connected to the upper end cover, an upper coarse and fine head water inlet pipe is provided on the outside of the upper end cover, and a first hollow thread sleeve is slidingly sleeved on the surface of the upper coarse and fine head water inlet pipe, and the first hollow thread sleeve is threadedly connected to the upper internal thread sleeve.

[0007] Preferably, a top threaded pipe is installed inside the upper end cover on one side of the side water inlet pipe, and the top threaded pipe is connected to the side water inlet pipe. A two-way threaded pipe is provided at the bottom end of the top threaded pipe, and the two-way threaded pipe is threadedly connected to the top threaded pipe.

[0008] Preferably, an upper annular flow diverter is provided at the bottom end of the bidirectional threaded tube, and the upper annular flow diverter extends to the interior of the column shell body, and the upper annular flow diverter is slidably connected to the column shell body.

[0009] Preferably, a water outlet pipe is provided on the outer wall of the lower ferrule, and the water outlet pipe extends to the interior of the lower ferrule, a second internal thread is provided on the inner wall of the lower ferrule on one side of the water outlet pipe, a second external thread is provided on the outer wall of the cylindrical shell body on one side of the second internal thread, and the second external thread is threadably connected to the second internal thread.

[0010] Preferably, a third internal thread is provided on the inner wall of the lower end cover at the bottom end of the lower ferrule, a fourth external thread is provided on the outer wall of the lower ferrule above the third internal thread, a lower sealing ring is provided at the bottom end of the lower ferrule on one side of the fourth external thread, and the third internal thread is threadably connected to the fourth external thread.

[0011] Preferably, a lower internal thread sleeve is provided inside the lower end cover below the third internal thread, and a plurality of groups of lower gripping plates with equal intervals are installed on the surface of the lower internal thread sleeve, and the lower gripping plates are all connected to the lower end cover.

[0012] Preferably, a second hollow threaded sleeve is provided on the outside of the lower end cover, and the second hollow threaded sleeve is threadedly connected to the lower internal threaded sleeve.

[0013] Preferably, a gasket is provided at the top of the lower internal threaded sleeve above the second hollow threaded sleeve, an annular support frame is provided at the top of the gasket, a lower annular diverter is provided at the top of the annular support frame, and the lower annular diverter extends to the interior of the column shell body, and the lower annular diverter is slidably connected to the column shell body.

[0014] Compared with the prior art, the beneficial effects of the utility model are: the roll-up membrane assembly not only realizes convenient threaded rotation fixing and movable removal, but also facilitates the threaded compression assembly of the roll-up membrane assembly, facilitates the recycling of the column shell, facilitates the modular assembly and use of individual parts, facilitates the disassembly and replacement of individual parts after damage, reduces the cost of subsequent maintenance, and improves the convenience of replacing the roll-up membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a front view structural schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the roll-type membrane body of the utility model;

[0018] Figure 4 It is a three-dimensional exploded view structural schematic diagram of the utility model;

[0019] Figure 5 It is a three-dimensional exploded structural diagram of the top threaded tube of the utility model;

[0020] Figure 6 It is a schematic diagram of the three-dimensional exploded view structure of the upper annular diverter of the utility model;

[0021] Figure 7 It is a three-dimensional exploded structural diagram of the lower annular diverter of the utility model;

[0022] Figure 8 It is a three-dimensional exploded structural diagram of the lower sealing ring of the utility model;

[0023] Fig. 9 It is a schematic diagram of the three-dimensional exploded view structure of the upper ferrule of the utility model.

[0024] In the figure: 1. cylindrical shell body; 2. upper ferrule; 3. upper annular diverter; 4. upper end cover; 5. first hollow threaded sleeve; 6. upper coarse and fine head water inlet pipe; 7. bidirectional threaded pipe; 8. lower ferrule; 9. lower annular diverter; 10. annular support frame; 11. gasket; 12. lower end cover; 13. second hollow threaded sleeve; 14. upper sealing ring; 15. lower sealing ring; 16. roll-type membrane body; 17. side water inlet pipe; 18. water outlet pipe; 19. first external thread; 20. second external thread; 21. first internal thread; 22. third external thread; 23. upper grip plate; 24. upper internal threaded sleeve; 25. second internal thread; 26. third internal thread; 27. lower internal threaded sleeve; 28. lower grip plate; 29. ​​fourth external thread; 30. top threaded pipe; 31. fourth internal thread. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] See also Figure 1-9The utility model provides an embodiment: a columnar structured roll membrane assembly, comprising a columnar shell body 1 and an upper ferrule 2, an upper ferrule 2 is arranged at the top of the columnar shell body 1, an upper end cover 4 is arranged at the top of the upper ferrule 2, a lower ferrule 8 is arranged at the bottom of the columnar shell body 1, a lower end cover 12 is arranged at the bottom of the lower ferrule 8, a first external thread 19 is arranged on the outer wall of the columnar shell body 1 on one side of the upper ferrule 2, a first internal thread 21 is arranged inside the upper ferrule 2 on one side of the first external thread 19, and the first internal thread 21 is threadedly connected to the first external thread 19, a roll membrane body 16 is arranged inside the columnar shell body 1 on one side of the first external thread 19, and the upper ferrule on one side of the first internal thread 21 is threadedly connected to the first external thread 19 2 is provided with a third external thread 22 on the outer wall, an upper sealing ring 14 is provided on the surface of the upper ferrule 2 on one side of the third external thread 22, a fourth internal thread 31 is provided inside the upper end cover 4 on one side of the third external thread 22, and the fourth internal thread 31 is threadedly connected with the third external thread 22, a side water inlet pipe 17 is provided on the outer wall of the upper end cover 4, and the side water inlet pipe 17 extends to the inside of the upper end cover 4, an upper internal thread sleeve 24 is provided inside the upper end cover 4 above the side water inlet pipe 17, multiple groups of upper grip plates 23 with equal spacing are installed on the outer wall of the upper internal thread sleeve 24, and the upper grip plates 23 are all connected to the upper end cover 4, an upper coarse and fine head water inlet pipe 6 is provided on the outside of the upper end cover 4, and the surface of the upper coarse and fine head water inlet pipe 6 is slidably sleeved with a first A hollow threaded sleeve 5, and the first hollow threaded sleeve 5 is threadedly connected to the upper internal threaded sleeve 24, a top threaded pipe 30 is installed inside the upper end cover 4 on one side of the side water inlet pipe 17, and the top threaded pipe 30 is connected to the side water inlet pipe 17, a two-way threaded pipe 7 is arranged at the bottom end of the top threaded pipe 30, and the two-way threaded pipe 7 is threadedly connected to the top threaded pipe 30, an upper annular diverter 3 is arranged at the bottom end of the two-way threaded pipe 7, and the upper annular diverter 3 extends to the inside of the column shell body 1, and the upper annular diverter 3 is slidably connected to the column shell body 1, an outlet pipe 18 is arranged on the outer wall of the lower ferrule 8, and the outlet pipe 18 extends to the inside of the lower ferrule 8, and a A second internal thread 25, a second external thread 20 is arranged on the outer wall of the cylindrical shell body 1 on one side of the second internal thread 25, and the second external thread 20 is threadedly connected with the second internal thread 25, a third internal thread 26 is arranged on the inner wall of the lower end cover 12 at the bottom end of the lower ferrule 8, a fourth external thread 29 is arranged on the outer wall of the lower ferrule 8 above the third internal thread 26, a lower sealing ring 15 is arranged at the bottom end of the lower ferrule 8 on one side of the fourth external thread 29, and the third internal thread 26 is threadedly connected with the fourth external thread 29, a lower internal thread sleeve 27 is arranged inside the lower end cover 12 below the third internal thread 26, and a plurality of groups of lower grip plates 28 with equal spacing are installed on the surface of the lower internal thread sleeve 27, and the lower grip plates 28 are all connected with the lower end cover 12;

[0027] When in use, first place the roll-type membrane body 16 inside the column shell body 1, place the upper annular diverter 3 on the top of the roll-type membrane body 16 inside the column shell body 1, and fix the two-way threaded tube 7 to the top of the upper annular diverter 3 under the thread cooperation of the two-way threaded tube 7 and the upper annular diverter 3. Under the thread of the first internal thread 21 and the first external thread 19, tighten the upper ferrule 2 to the top of the column shell body 1, and under the thread cooperation of the third external thread 22 and the fourth internal thread 31, the upper sealing ring 14 is sealed on the upper ferrule 2 and the upper end cover 4, and then screw it. Turn the upper grip plate 23 to tighten the upper end cover 4 on the top of the upper ferrule 2. Under the thread cooperation between the top threaded tube 30 and the two-way threaded tube 7, the top threaded tube 30 provides pressure to the two-way threaded tube 7 to keep the upper annular flow divider 3 under pressure on the roll-type membrane body 16. Under the sliding support of the first hollow threaded sleeve 5 and the upper coarse and fine head water inlet pipe 6, the first hollow threaded sleeve 5 is sleeved on the surface of the upper coarse and fine head water inlet pipe 6. Under the thread cooperation between the first hollow threaded sleeve 5 and the upper internal threaded sleeve 24, the upper coarse and fine head water inlet pipe 6 is fixed to the top of the upper internal threaded sleeve 24 by the first hollow threaded sleeve 5. At the end, under the thread cooperation of the second external thread 20 and the second internal thread 25, the lower clamping sleeve 8 is fixed to the bottom end of the column shell body 1, the lower annular diverter 9 is placed on the bottom end of the roll-type membrane body 16, and the lower annular diverter 9 is supported by the annular support frame 10. Under the thread cooperation of the third internal thread 26 and the fourth external thread 29, the lower end cover 12 is fixed to the bottom end of the lower clamping sleeve 8. Under the thread cooperation of the second hollow threaded sleeve 13 and the lower internal threaded sleeve 27, the lower grip plate 28 is rotated to fix the second hollow threaded sleeve 13 to the bottom end of the lower internal threaded sleeve 27. The second hollow threaded sleeve 13 is fixed to the bottom end of the lower internal threaded sleeve 27. The sleeve 13 supports the annular support frame 10 through the gasket 11, the lower annular diverter 9 and the upper annular diverter 3 support the roll membrane body 16, the upper coarse and fine head water inlet pipe 6 and the side water inlet pipe 17 can be connected to the water pipe, and the roll membrane body 16 filters and purifies the water, realizing the convenient threaded rotation fixation of the columnar structure roll membrane assembly, facilitating the threaded compression assembly of the roll membrane assembly, facilitating the modular assembly and use of a single part, facilitating the disassembly and replacement of a single part after damage, reducing the cost of later maintenance, and improving the convenience of assembly of the roll membrane assembly;

[0028] A second hollow threaded sleeve 13 is provided on the outside of the lower end cover 12, and the second hollow threaded sleeve 13 is threadedly connected to the lower internal threaded sleeve 27, a gasket 11 is provided on the top of the lower internal threaded sleeve 27 above the second hollow threaded sleeve 13, an annular support frame 10 is provided on the top of the gasket 11, a lower annular diverter 9 is provided on the top of the annular support frame 10, and the lower annular diverter 9 extends to the inside of the column shell body 1, and the lower annular diverter 9 is slidably connected to the column shell body 1;

[0029] When it is necessary to replace the internal rolled membrane body 16, the upper end cover 4 is conveniently removed from the top of the upper ferrule 2 by rotating the upper end cover 4 and the upper ferrule 2 in the opposite direction, and the upper ferrule 2 is conveniently removed from the top of the column shell body 1 by rotating the upper ferrule 2 and the column shell body 1 in the opposite direction. Under the sliding cooperation between the upper annular diverter 3 and the column shell body 1, the upper annular diverter 3 is conveniently removed from the inside of the column shell body 1. Under the thread cooperation between the second hollow threaded sleeve 13 and the lower internal threaded sleeve 27, the second hollow threaded sleeve 13 is spirally moved inside the lower internal threaded sleeve 27, and the second hollow threaded sleeve 13 drives the gasket 11 to move, the gasket 11 drives the annular support frame 10 to move, the annular support frame 10 drives the lower annular diverter 9 to move, and under the sliding support of the lower annular diverter 9 and the column shell body 1, the lower annular diverter 9 drives the roll membrane body 16 to move, so as to facilitate the roll membrane body 16 to slide out from the inside of the column shell body 1, so as to facilitate the replacement of the roll membrane body 16, realize the convenient sliding removal of the roll membrane assembly of the column structure, facilitate the removal of the roll membrane from the inside of the column shell, facilitate the recycling of the column shell, and improve the convenience of replacing the roll membrane.

[0030] Working principle: When in use, first place the roll membrane body 16 inside the column shell body 1, place the upper annular diverter 3 on the top of the roll membrane body 16 inside the column shell body 1, fix the two-way threaded pipe 7 on the top of the upper annular diverter 3, tighten the upper ferrule 2 on the top of the column shell body 1, and under the sealing of the upper sealing ring 14 on the upper ferrule 2 and the upper end cover 4, rotate the upper grip plate 23 to tighten the upper end cover 4 on the top of the upper ferrule 2, and the top threaded pipe 30 provides pressure to the two-way threaded pipe 7, so that the upper annular diverter 3 can keep the roll membrane body 16. Maintaining pressure, the first hollow threaded sleeve 5 is sleeved on the surface of the upper coarse and fine head water inlet pipe 6, the upper coarse and fine head water inlet pipe 6 is fixed to the top of the upper internal threaded sleeve 24 by the first hollow threaded sleeve 5, the lower clamping sleeve 8 is fixed to the bottom end of the column shell body 1, the lower annular diverter 9 is placed on the bottom end of the roll membrane body 16, the lower annular diverter 9 is supported by the annular support frame 10, the lower end cover 12 is fixed to the bottom end of the lower clamping sleeve 8, the lower grip plate 28 is rotated to fix the second hollow threaded sleeve 13 to the bottom end of the lower internal threaded sleeve 27, and the second hollow threaded sleeve 13 is fixed to the annular sleeve 11 through the gasket The shaped support frame 10 supports, the lower annular diverter 9 and the upper annular diverter 3 support the roll membrane body 16, the upper coarse and fine head water inlet pipe 6 and the side water inlet pipe 17 can be connected to the water pipe, and the roll membrane body 16 filters and purifies the water. When the internal roll membrane body 16 needs to be replaced, the upper end cover 4 and the upper ferrule 2 are rotated in the opposite direction to facilitate the upper end cover 4 to be removed from the top of the upper ferrule 2, and the upper ferrule 2 and the column shell body 1 are rotated in the opposite direction to facilitate the upper ferrule 2 to be removed from the top of the column shell body 1. Under the sliding cooperation, the upper annular diverter 3 is conveniently moved out from the interior of the column shell body 1, and the second hollow threaded sleeve 13 is spirally moved inside the lower internal threaded sleeve 27, and the second hollow threaded sleeve 13 drives the gasket 11 to move, and the gasket 11 drives the annular support frame 10 to move, and the annular support frame 10 drives the lower annular diverter 9 to move, and the lower annular diverter 9 drives the roll-type membrane body 16 to move, so as to facilitate the roll-type membrane body 16 to slide out from the interior of the column shell body 1, so as to facilitate the replacement of the roll-type membrane body 16 and complete the use of the roll-type membrane assembly.

[0031] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A columnar spiral membrane assembly, comprising a columnar housing body (1) and an upper ferrule (2), characterized in that: An upper ferrule (2) is arranged at the top of the cylindrical shell body (1), an upper end cover (4) is arranged at the top of the upper ferrule (2), a lower ferrule (8) is arranged at the bottom of the cylindrical shell body (1), and a lower end cover (12) is arranged at the bottom of the lower ferrule (8), a first external thread (19) is arranged on the outer wall of the cylindrical shell body (1) on one side of the upper ferrule (2), a first internal thread (21) is arranged inside the upper ferrule (2) on one side of the first external thread (19), and the first internal thread (21) is threadedly connected to the first external thread (19), a rolled membrane body (16) is arranged inside the cylindrical shell body (1) on one side of the first external thread (19), a third external thread (22) is arranged on the outer wall of the upper ferrule (2) on one side of the first internal thread (21), and a surface of the upper ferrule (2) on one side of the third external thread (22) is provided. An upper sealing ring (14) is arranged, a fourth internal thread (31) is arranged inside the upper end cover (4) on one side of the third external thread (22), and the fourth internal thread (31) is threadedly connected to the third external thread (22), a side water inlet pipe (17) is arranged on the outer wall of the upper end cover (4), and the side water inlet pipe (17) extends to the inside of the upper end cover (4), an upper internal thread sleeve (24) is arranged inside the upper end cover (4) above the side water inlet pipe (17), a plurality of groups of upper grip plates (23) with equal spacing are installed on the outer wall of the upper internal thread sleeve (24), and the upper grip plates (23) are all connected to the upper end cover (4), an upper coarse and fine head water inlet pipe (6) is arranged outside the upper end cover (4), a first hollow thread sleeve (5) is slidably sleeved on the surface of the upper coarse and fine head water inlet pipe (6), and the first hollow thread sleeve (5) is threadedly connected to the upper internal thread sleeve (24).

2. A columnar wound membrane assembly according to claim 1, characterized in that: A top threaded pipe (30) is installed inside the upper end cover (4) on one side of the side water inlet pipe (17), and the top threaded pipe (30) is connected to the side water inlet pipe (17). A bidirectional threaded pipe (7) is provided at the bottom end of the top threaded pipe (30), and the bidirectional threaded pipe (7) is threadedly connected to the top threaded pipe (30).

3. A columnar wound membrane assembly according to claim 2, characterized in that: An upper annular flow divider (3) is provided at the bottom end of the bidirectional threaded tube (7), and the upper annular flow divider (3) extends into the interior of the column shell body (1), and the upper annular flow divider (3) is slidably connected to the column shell body (1).

4. The columnar wound membrane assembly according to claim 1, characterized in that: A water outlet pipe (18) is arranged on the outer wall of the lower ferrule (8), and the water outlet pipe (18) extends to the interior of the lower ferrule (8); a second internal thread (25) is arranged on the inner wall of the lower ferrule (8) on one side of the water outlet pipe (18); a second external thread (20) is arranged on the outer wall of the columnar shell body (1) on one side of the second internal thread (25), and the second external thread (20) is threadedly connected to the second internal thread (25).

5. A columnar wound membrane assembly according to claim 4, characterized in that: A third internal thread (26) is provided on the inner wall of the lower end cover (12) at the bottom end of the lower ferrule (8), a fourth external thread (29) is provided on the outer wall of the lower ferrule (8) above the third internal thread (26), a lower sealing ring (15) is provided at the bottom end of the lower ferrule (8) on one side of the fourth external thread (29), and the third internal thread (26) is threadedly connected to the fourth external thread (29).

6. A columnar wound membrane assembly according to claim 5, characterized in that: A lower internal thread sleeve (27) is arranged inside the lower end cover (12) below the third internal thread (26), and a plurality of groups of lower gripping plates (28) are mounted at equal intervals on the surface of the lower internal thread sleeve (27), and the lower gripping plates (28) are all connected to the lower end cover (12).

7. A columnar wound membrane assembly according to claim 6, characterized in that: A second hollow threaded sleeve (13) is disposed outside the lower end cover (12), and the second hollow threaded sleeve (13) is threadedly connected to the lower internal threaded sleeve (27).

8. The columnar wound membrane assembly according to claim 7, characterized in that: A gasket (11) is arranged at the top end of the lower internally threaded sleeve (27) above the second hollow threaded sleeve (13); an annular support frame (10) is arranged at the top end of the gasket (11); a lower annular flow divider (9) is arranged at the top end of the annular support frame (10); the lower annular flow divider (9) extends into the interior of the column shell body (1), and the lower annular flow divider (9) is slidably connected to the column shell body (1).

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