CN220900032U - Quick-assembling type film shell - Google Patents

Abstract

The application provides a quick-assembly type membrane shell, which comprises the following components: the device comprises a hollow shell, an upper end cover and a lower end cover, wherein a raw water inlet is formed in the upper end cover, and a purified water outlet and a concentrated water outlet are formed in the lower end cover. The upper end cover, the lower end cover are all the same with the connected mode of cavity casing tip, and cavity casing tip is provided with first flange, and the one end that upper end cover and cavity casing are connected is provided with the second flange, and first flange passes through joint subassembly with the second flange and is connected. The edge of the first flange is provided with a magnetic strip, and the edge of the second flange is provided with an iron block at the position corresponding to the magnetic strip. The application realizes the rapid and convenient disassembly and assembly of the membrane shell, thereby improving the water treatment efficiency.

Description

Quick-assembling type film shell

Technical Field

The application relates to the technical field of water treatment equipment, in particular to a quick-assembling type membrane shell.

Background

In the water treatment technology, reverse osmosis is a modern novel purified water treatment technology, the reverse osmosis equipment filters raw water through a fine filter, a granular activated carbon filter, a compressed activated carbon filter and the like, then pressurizes the raw water through a pump, the purity of water quality is improved by utilizing a reverse osmosis element, impurities and salts contained in the water are removed, and in a reverse osmosis water treatment system, a reverse osmosis membrane is a core part of reverse osmosis purified water. The reverse osmosis membrane (RO membrane) with the aperture of 1/10000 mu m is utilized to change the water with higher concentration into water with low concentration, and simultaneously, a large amount of impurities such as industrial pollutants, heavy metals, bacteria, viruses and the like which are mixed into the water are completely isolated, thereby reaching the physicochemical index and the sanitary standard of drinking and producing pure water.

In the current use of reverse osmosis elements, reverse osmosis membranes are placed in a membrane shell. Wherein the membrane shell is used for placing and fixedly supporting the reverse osmosis membrane, and the structure of the membrane shell comprises a hollow shell body and two end covers. The water inlet of the membrane shell is generally positioned on the end covers, the water outlet port and the concentrated water port are positioned at the lower side end of the cylinder body, and the two end covers and the hollow shell are both threaded interfaces. The threaded interface needs to be connected with a joint, so that the operation is complex, the installation is not convenient enough, time and labor are wasted, and the water treatment efficiency is reduced.

Disclosure of utility model

The present application provides a quick-assembling membrane shell for solving the above-mentioned problems in the background art.

The application provides a quick-assembly type membrane shell, which comprises the following components: the device comprises a hollow shell, an upper end cover and a lower end cover, wherein a raw water inlet is formed in the upper end cover, and a purified water outlet and a concentrated water outlet are formed in the lower end cover.

The upper end cover, the lower end cover are all the same with the connected mode of cavity casing tip, and cavity casing tip is provided with first flange, and the one end that upper end cover and cavity casing are connected is provided with the second flange, and first flange passes through joint subassembly with the second flange and is connected.

The edge of the first flange is provided with a magnetic strip, and the edge of the second flange is provided with an iron block at the position corresponding to the magnetic strip.

Optionally, a reverse osmosis membrane and a central membrane tube are arranged in the hollow shell along the central position of the axial direction, the multi-layer reverse osmosis membrane is wrapped outside the central membrane tube along the radial direction of the central membrane tube to form a filtering area, and two ends of the central membrane tube are respectively connected with the upper end cover and the lower end cover. The raw water inlet is connected with one end of the filtering area close to the upper end cover, the concentrated water outlet is connected with one end of the filtering area close to the lower end cover, and the purified water outlet is connected with one end of the central membrane tube close to the lower end cover.

Optionally, the joint subassembly includes pivot and chucking structure, and chucking structure is provided with two with the axis symmetry of pivot, and chucking structure includes: push rod, buckle, draw-in groove, spring support plate, spring fixed slot.

The clamping grooves are arranged at the positions in the first flange, which are contacted with the shaft pin, the side surfaces of the shaft pin, which are contacted with the clamping grooves at two sides, are respectively provided with spring fixing grooves in bilateral symmetry, the middle parts of the left spring fixing groove and the right spring fixing groove are not communicated, one end of each buckle is fixedly connected with the spring supporting plate, the other end of each buckle extends into the clamping groove, one end of each spring is fixedly connected with the spring supporting plate, and the other end of each spring is fixedly connected with one side wall of the spring fixing groove, which is close to the central axis of the shaft pin; one end of the push rod extends into the clamping groove, the other end of the push rod extends out of the clamping groove and is positioned outside the first flange, and the section of the spring supporting plate is larger than the section of the clamping groove.

Optionally, a part of the push rod extending into the clamping groove is connected with a clamping block.

Optionally, a central membrane tube groove is arranged in the upper end cover, and an in-groove spring, a gasket and a nut are arranged in the central membrane tube groove.

One end of the spring in the groove is connected with the end part of the groove of the central membrane tube, the other end of the spring in the groove is connected with the center of the gasket, one end of the nut is fixedly connected with the gasket, and one end of the central membrane tube is connected with the nut through threads.

Optionally, the diameter of the spacer is equal to the inner diameter of the central membrane tube groove.

Optionally, a sealing ring is arranged between the first flange and the second flange.

The quick-assembly type membrane shell provided by the application realizes quick and convenient disassembly and assembly of the membrane shell, and has the following beneficial effects compared with the prior art:

(1) The first flange and the second flange are arranged, so that the operation is more convenient when the upper end cover and/or the lower end cover are connected with the hollow shell. Through being provided with the magnetic stripe on first flange edge, the edge of second flange is provided with the iron plate, when the membrane shell installation, at first adsorb upper end cover and/or lower end cover in the tip of cavity casing through the magnetism effect of magnetic stripe and iron plate, confirm that upper end cover and/or lower end cover and cavity casing are coaxial setting, the rethread joint subassembly carries out fastening connection, and then makes upper end cover and/or lower end cover be connected with cavity casing, accomplishes the installation of membrane shell. Therefore, time and labor are saved during operation, the upper end cover and/or the lower end cover are/is convenient to install, the installation time of the membrane shell during replacement of the filter unit is shortened, the installation efficiency is improved, and meanwhile, the water treatment efficiency is improved.

(2) The clamping assembly comprises a shaft pin, a push rod, a buckle, a clamping groove, a spring supporting plate and a spring fixing groove. The upper end cover and/or the lower end cover are/is installed by pushing, pulling out and inserting and pulling out the shaft pin by an operator. Make the installation more convenient and fast, installation effectiveness is high, and operation labour saving and time saving reduces the labour and drops into.

(3) Through being provided with central membrane pipe recess in the upper end cover, be provided with inslot spring, gasket and nut in the central membrane pipe recess. Not only make the fixed effect of central membrane pipe better, can also carry out the position control to the length of central membrane pipe for hollow shell through threaded connection, reach the installation purpose of central membrane pipe.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a quick-assembly membrane shell according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a quick-assembled membrane shell according to another embodiment of the present application;

FIG. 3 is a schematic structural diagram of a clamping assembly according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating connection between a central membrane tube and an upper end cap according to an embodiment of the present application;

FIG. 5 is a top view of a spring and pin connection according to an embodiment of the present application;

FIG. 6 is a top view of a first flange and pin connection according to an embodiment of the present application;

Reference numerals illustrate: 1: hollow shell, 2: upper end cover, 3: lower end cover, 4: filtration zone, 6: center membrane tube, 8: sealing ring, 210: raw water inlet, 230: center membrane tube groove, 240: in-groove spring, 250: gasket, 260: nut, 310: purified water outlet, 320: concentrated water outlet, 510: first flange, 520: second flange, 530: shaft pin, 540: push rod, 541: clamping block, 550: buckle, 551: card slot, 560: spring, 570: spring support plate, 580: spring fixing groove 710: magnetic stripe, 720: iron blocks.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are also within the scope of the application.

As shown in fig. 1 and 2, the present application provides a quick-assembling type membrane shell, comprising: the device comprises a hollow shell 1, an upper end cover 2 and a lower end cover 3, wherein a raw water inlet 210 is formed in the upper end cover 2, and a purified water outlet 310 and a concentrated water outlet 320 are formed in the lower end cover 3.

The connection modes of the upper end cover 2, the lower end cover 3 and the end part of the hollow shell 1 are the same, the end part of the hollow shell 1 is provided with a first flange 510, one end, connected with the hollow shell 1, of the upper end cover 2 is provided with a second flange 520, and the first flange 510 is connected with the second flange 520 through a clamping assembly.

The edge of the first flange 510 is provided with a magnetic stripe 710, and the edge of the second flange 520 is provided with an iron block 720 at a position corresponding to the magnetic stripe 710.

Specifically, the fast-assembling membrane shell provided by the application comprises a hollow shell 1, an upper end cover 2 and a lower end cover 3, wherein a filtering unit is arranged in the hollow shell 1 for filtering raw water, the upper end cover 2 is provided with a raw water inlet 210 for inputting raw water to be filtered into the hollow shell 1 for filtering, and the lower end cover 3 is provided with a purified water outlet 310 and a concentrated water outlet 320 for outputting purified water obtained after filtering and concentrated water containing impurities respectively through the purified water outlet 310 and the concentrated water outlet 320, so that the purpose of filtering raw water is achieved. The hollow shell 1 is detachably connected with the upper end cover 2 and the lower end cover 3, and after a period of use, the filter unit in the hollow shell 1 needs to be replaced, so that the upper end cover 2 and the lower end cover 3 need to be detached and installed.

The end of the hollow shell 1 is provided with a first flange 510, one end of the upper end cover 2 connected with the hollow shell 1 is provided with a second flange 520, the hollow shell 1 is connected with the upper end cover 2 and the lower end cover 3 through flanges, and the first flange 510 is connected with the second flange 520 through a clamping assembly. Meanwhile, the magnetic stripe 710 is disposed at the edge of the first flange 510, the iron block 720 is disposed at the position corresponding to the magnetic stripe 710 at the edge of the second flange 520, and when the upper end cover 2 and/or the lower end cover 3 need to be installed, the installation of the upper end cover 2 is exemplified: firstly, the upper end cover 2 is close to the upper surface of the first flange 510, and the upper end cover 2 is rotated along the circumferential direction where the section of the first flange 510 is located, as the magnetic strip 710 is arranged on the edge of the first flange 510, the iron block 720 is arranged on the edge of the second flange 520, the magnetic strip 710 and the iron block 720 are magnetically attracted, the iron block 720 is adsorbed on the magnetic strip 710, and then the upper end cover 2 is adsorbed on the end part of the hollow shell 1, so that the installation position of the upper end cover 2 is firstly determined, the upper end cover 2 and the hollow shell 1 are coaxially arranged, and the position of the upper end cover 2 is not offset. Then, the first flange 510 and the second flange 520 are fastened and connected through the clamping assembly under the condition that the magnetic strip 710 and the iron block 720 are magnetically attracted, so that the upper end cover 2 and/or the lower end cover 3 are/is connected with the hollow shell, and the installation of the membrane shell is completed. The operation is time-saving and labor-saving, the upper end cover 2 and/or the lower end cover 3 are/is convenient to install, the installation time of the membrane shell during replacement of the filter unit is shortened, the installation efficiency is improved, and meanwhile, the water treatment efficiency is improved.

The two pairs of magnetic strips 710 and the iron blocks 720 are symmetrically arranged, so that the positions of the upper end cover 2 and/or the lower end cover 3 and the end part of the hollow shell 1 are more accurately confirmed during installation, and the clamping assembly is more convenient to fasten and connect the first flange 510 and the second flange 520. Further improving the installation efficiency of the membrane shell.

According to the scheme, the quick installation of the membrane shell is completed. The first flange and the second flange are arranged, so that the operation is more convenient when the upper end cover and/or the lower end cover are connected with the hollow shell. Through being provided with the magnetic stripe on first flange edge, the edge of second flange is provided with the iron plate, when the membrane shell installs, at first adsorb upper end cover and/or lower end cover in the tip of cavity casing through the magnetism effect of magnetic stripe and iron plate, confirm that upper end cover and/or lower end cover and cavity casing are coaxial setting, and the position does not take place the skew, then the rethread joint subassembly carries out fastening connection to first flange and second flange, and then makes upper end cover and/or lower end cover and cavity casing be connected, accomplishes the installation of membrane shell. Therefore, time and labor are saved during operation, the upper end cover and/or the lower end cover are/is convenient to install, the installation time of the membrane shell during replacement of the filter unit is shortened, the installation efficiency is improved, and meanwhile, the water treatment efficiency is improved.

Optionally, a reverse osmosis membrane and a central membrane tube 6 are arranged in the hollow shell 1 along the axial direction, the multi-layer reverse osmosis membrane is wrapped outside the central membrane tube 6 along the radial direction of the central membrane tube 6 to form a filtering area 4, and two ends of the central membrane tube 6 are respectively connected with the upper end cover 2 and the lower end cover 3. The raw water inlet 210 is connected with one end of the filtering area 4 close to the upper end cover 2, the concentrated water outlet 320 is connected with one end of the filtering area 4 close to the lower end cover 3, and the purified water outlet 310 is connected with one end of the central membrane tube 6 close to the lower end cover 3.

Specifically, the central membrane tube 6 is disposed at a central position along an axial direction in the hollow housing 1, the multi-layer reverse osmosis membrane sheet is wrapped outside the central membrane tube 6 along a radial direction of the central membrane tube 6 to form the filtration zone 4, raw water enters the filtration zone 4 through the raw water inlet 210, raw water moves along the radial direction of the hollow housing 1 under pressure, and during the movement, purified water enters the central membrane tube 6 through the multi-layer reverse osmosis membrane sheet, and flows from the central membrane tube 6 to the purified water outlet 310 along the axial direction and flows out of the membrane housing. And impurities in the raw water cannot pass through the multi-layer reverse osmosis membrane, remain in the filtering area 4 and form concentrated water with the residual unfiltered water, and finally the concentrated water flows to the concentrated water outlet 320 and flows out of the membrane shell to achieve the aim of purifying the raw water. The multi-layer reverse osmosis membrane forms the filtering area 4, so that the filtering effect on raw water can be improved, the pressure in the filtering process can be borne, the long-period use of the reverse osmosis membrane is facilitated, and the production cost is saved.

As shown in fig. 3, 5 and 6, optionally, the clamping assembly includes a shaft pin 530 and a clamping structure, the clamping structure is symmetrically arranged with respect to a central axis of the shaft pin 530, and the clamping structure includes: push rod 540, buckle 550, card slot 551, spring 560, spring support plate 570, spring fixing slot 580.

The clamping grooves 551 are arranged at the positions in the first flange 510, which are contacted with the shaft pins 530, the side surfaces of the shaft pins 530, which are contacted with the clamping grooves 551 at the two sides, are respectively provided with a spring fixing groove 580 in a bilateral symmetry manner, the middle parts of the two left and right spring fixing grooves 580 are not communicated, one end of the clamping buckle 550 is fixedly connected with the spring supporting plate 570, the other end of the clamping buckle 550 stretches into the clamping groove 551, one end of the spring 560 is fixedly connected with the spring supporting plate 570, and the other end of the spring 560 is fixedly connected with one side wall of the spring fixing groove 580, which is close to the central axis of the shaft pins 530; one end of the push rod 540 extends into the clamping groove 551, the other end of the push rod 540 extends out of the clamping groove 551 and is positioned outside the first flange 510, and the section of the spring supporting plate 570 is larger than the section of the clamping groove 551.

Specifically, as shown in fig. 5, the spring 560 is connected to the shaft pin 530 in the following manner: the spring fixing grooves 580 are symmetrically arranged on the side surface of the shaft pin 530 contacted with the clamping grooves 551 on two sides, and the middle parts of the two spring fixing grooves 580 are not communicated, so that an I-shaped structure with a top view shown in fig. 5 is formed. One end of the two springs 560 far away from the buckle 550 is fixedly connected with the left side and the right side of the I-shaped structure on the shaft pin 530 respectively, so that the springs 560 are fixed, and the springs 560 can stretch and deform in the clamping grooves 551 to drive the buckle 550 to move.

In the process of fastening and connecting the first flange 510 and the second flange 520, the shaft pin 530 is vertically inserted into the first flange 510 and the second flange 520, and the position of the shaft pin 530 is fixed, so that the purpose of fastening the first flange 510 and the second flange 520 is achieved, and the upper end cover 2 and/or the lower end cover 3 are/is mounted on the hollow shell 1. The clamping groove 551 is used for placing the push rod 540 and the buckle 550, and has elastic deformation by using the spring 560, so as to stretch and retract the buckle 550. The spring support plate 570 and the spring fixing groove 580 serve to position the spring 560. Meanwhile, when the shaft pin 530 needs to be pulled out of the first flange 510, the push rod 540 is pushed to enable the push rod 540 to apply force to the buckle 550, the buckle 550 is subjected to horizontal force of the push rod 540 in the direction of the central axis of the shaft pin 530, under the elastic deformation of the spring 560, the buckle 550 pushes the spring 560 to shrink, when the distance between the ends, close to the push rod 540, of the two symmetrically arranged buckles 550 is equal to the width of the shaft pin 530, the shaft pin 530 can be moved up and down, and meanwhile, the buckle 550, the spring 560 and the spring support plate 570 move upwards along with the shaft pin 530, the shaft pin 530 is pulled out of the first flange 510, and therefore the purpose of disassembling the upper end cover 2 and/or the lower end cover 3 from the hollow shell 1 is achieved.

If the membrane shell needs to be installed, a force is manually applied to the buckle 550, so that the buckle 550 compresses the spring 560, when the spring 560 is compressed to a distance between two symmetrically arranged ends of the buckle 550, which are close to the push rod 540, is equal to the width of the shaft pin 530, the shaft pin 530 is inserted into the first flange 510, meanwhile, the buckle 550, the spring 560 and the spring support plate 570 move downwards along with the shaft pin 530, when the shaft pin 530 moves to the level of the spring fixing groove 580 and the clamping groove 551, the spring 560 stretches into the clamping groove 551 under the action of elastic deformation, so that the shaft pin 530 can not move any more, and the purpose of installing the upper end cover 2 and/or the lower end cover 3 and the hollow shell 1 is achieved. The installation of upper end cover 2 and/or lower end cover 3 and cavity casing 1 is carried out through screw interface in the prior art in the setting like this for installation convenient and fast more, installation effectiveness is high, and operation labour saving and time saving reduces the labour and drops into.

Meanwhile, the section of the spring supporting plate 570 is larger than that of the clamping groove 551, so that the spring supporting plate 570 is convenient to fix the buckle 550, and the shaft pin 530 is prevented from shaking due to the fact that the spring 560 moves into the clamping groove 551, and the shaft pin 530 is arranged to enable the fixing of the first flange 510 and the second flange 520 to be more stable.

Optionally, a portion of the push rod 540 extending into the clamping groove 551 is connected with a clamping block 541.

Specifically, the positioning of the clamping block 541 plays a role in limiting the push rod 540, and prevents the push rod 540 from falling from the clamping groove 551.

As shown in fig. 4, optionally, a central membrane tube groove 230 is provided in the upper end cap 2, and an in-groove spring 240, a spacer 250, and a nut 260 are provided in the central membrane tube groove 230.

One end of the in-groove spring 240 is connected with the end of the central membrane tube groove 230, the other end of the in-groove spring 240 is connected with the center of the gasket 250, one end of the nut 260 is fixedly connected with the gasket 250, and one end of the central membrane tube 6 is connected with the nut 260 through threads.

Optionally, the diameter of the spacer 250 is equal to the inner diameter of the central membrane tube groove 230.

Specifically, the central membrane tube groove 230 is used for extending one end of the central membrane tube 6 into the central membrane tube groove, and serves to fix the position of one end of the central membrane tube 6. The provision of the springs 240 allows the central membrane tube 6 to be cushioned during filtration, preventing damage to the central membrane tube 6 under pressure. The nut 260 is fixedly arranged on the gasket 250, and one end of the central membrane tube 6 is connected with the nut 260 through threads, so that the fixing effect of the central membrane tube 6 is better, and the position of the central membrane tube 6 relative to the length of the hollow shell 1 can be adjusted through the threads. If the center membrane tube 6 is applied to the hollow housing 1 longer, the center membrane tube 6 is moved in a direction approaching the center membrane tube groove 230 by rotating the nut 260 toward the center membrane tube groove 230 to be adapted to the hollow housing 1. Similarly, if the center tube 6 is shorter when applied to the hollow housing 1, the installation of the center tube 6 is achieved by rotating the nut 260 in a direction away from the center tube groove 230.

As shown in fig. 1, optionally, a sealing ring 8 is disposed between the first flange 510 and the second flange 520.

Specifically, the sealing ring 8 can avoid water leakage from the connection position of the upper end cover 2 and/or the lower end cover 3 and the hollow shell 1, and is beneficial to stable operation of filtration. And the outer diameter of the sealing ring 8 is smaller than the outer diameters of the first flange 510 and the second flange 520. Not only is the sealing effect facilitated, but also the influence on the magnetic attraction between the magnetic strip 710 and the iron block 720 can be avoided.

The technical scheme of the application is illustrated in detail by specific examples.

In this embodiment, the operation flow of the fast-assembling membrane shell in specific work is as follows:

The upper end cover 2 and the lower end cover 3 are assembled and disassembled in the same way. When the membrane shell needs to be disassembled, an operator pushes the push rod 540 simultaneously by hand, so that when the distance between the two symmetrically arranged buckles 550 is equal to the width of the shaft pin 530, the shaft pin 530 is pulled out of the first flange 510 upwards (or the shaft pin 530 is pulled out of the second flange 520 upwards), the first flange 510 and the second flange 520 are in an unconnected state, and then the upper end cover 2 and/or the lower end cover 3 are taken away, so that the membrane shell is disassembled.

When the membrane shell needs to be installed, the upper end cover 2 is firstly close to the upper surface of the first flange 510, the upper end cover 2 is rotated along the circumferential direction where the section of the first flange 510 is located, and the magnetic strip 710 and the iron block 720 are magnetically attracted, so that the iron block 720 is adsorbed on the magnetic strip 710, and the installation position of the upper end cover 2 is determined. The first flange 510 and the second flange 520 are then fastened by the clamping assembly under the magnetic attraction of the magnetic strip 710 and the iron block 720. The push rod 540 is pulled outwards, the shaft pin 530 is inserted into the first flange 510 downwards from the second flange 520, the spring 560 is in a compressed state at this time, when the buckle 550 moves into the clamping groove 551, the spring 560 stretches out, the fixation of the shaft pin 530 is completed, and then the upper end cover 2 and/or the lower end cover 3 are fixed on the hollow shell 1, and the installation of the membrane shell is completed.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present application, and not limiting thereof; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (7)

1. A quick-fit membrane shell, comprising: the device comprises a hollow shell (1), an upper end cover (2) and a lower end cover (3), wherein a raw water inlet (210) is formed in the upper end cover (2), and a purified water outlet (310) and a concentrated water outlet (320) are formed in the lower end cover (3);

The upper end cover (2), the lower end cover (3) and the end part of the hollow shell (1) are all the same in connection mode, a first flange (510) is arranged at the end part of the hollow shell (1), a second flange (520) is arranged at one end, connected with the hollow shell (1), of the upper end cover (2), and the first flange (510) is connected with the second flange (520) through a clamping assembly;

The edge of the first flange (510) is provided with a magnetic strip (710), and the edge of the second flange (520) is provided with an iron block (720) at the position corresponding to the magnetic strip (710).

2. The quick-assembling membrane shell according to claim 1, wherein a reverse osmosis membrane and a central membrane tube (6) are arranged in the hollow shell (1) along the axial direction, a plurality of layers of reverse osmosis membrane are wrapped outside the central membrane tube (6) along the radial direction of the central membrane tube (6) to form a filtering area (4), and two ends of the central membrane tube (6) are respectively connected with the upper end cover (2) and the lower end cover (3); raw water inlet (210) with filter district (4) be close to one end of upper end cover (2) is connected, dense water outlet (320) with filter district (4) be close to one end of lower end cover (3) is connected, clear water outlet (310) with center membrane pipe (6) be close to one end of lower end cover (3) is connected.

3. The quick-fit membrane shell according to claim 2, wherein the clamping assembly comprises a shaft pin (530) and a clamping structure, the clamping structure being symmetrically arranged with respect to a central axis of the shaft pin (530), the clamping structure comprising: the device comprises a push rod (540), a buckle (550), a clamping groove (551), a spring (560), a spring supporting plate (570) and a spring fixing groove (580);

The clamping groove (551) is arranged at a position in the first flange (510) contacted with the shaft pin (530), two spring fixing grooves (580) are respectively and symmetrically formed on the side surfaces of the shaft pin (530) contacted with the clamping grooves (551) at two sides, the middle parts of the two spring fixing grooves (580) are not communicated, one end of the clamping buckle (550) is fixedly connected with the spring supporting plate (570), the other end of the clamping buckle (550) stretches into the clamping groove (551), one end of the spring (560) is fixedly connected with the spring supporting plate (570), and the other end of the spring (560) is fixedly connected with one side wall of the spring fixing groove (580) close to the central axis of the shaft pin (530); one end of the push rod (540) stretches into the clamping groove (551), the other end of the push rod (540) stretches out of the clamping groove (551) and is located outside the first flange (510), and the section of the spring supporting plate (570) is larger than the section of the clamping groove (551).

4. A quick-fit membrane shell according to claim 3, characterized in that the part of the push rod (540) extending into the clamping groove (551) is connected with a clamping block (541).

5. The quick-assembling membrane shell according to any one of claims 1-4, wherein a central membrane tube groove (230) is arranged in the upper end cover (2), and an in-groove spring (240), a gasket (250) and a nut (260) are arranged in the central membrane tube groove (230);

One end of the in-groove spring (240) is connected with the end part of the central membrane tube groove (230), the other end of the in-groove spring (240) is connected with the center of the gasket (250), one end of the nut (260) is fixedly connected with the gasket (250), and one end of the central membrane tube (6) is connected with the nut (260) through threads.

6. The quick-fit membrane shell according to claim 5, characterized in that the diameter of the shim (250) is equal to the inner diameter of the central membrane tube groove (230).

7. The quick-fit membrane shell according to claim 6, characterized in that a sealing ring (8) is arranged between the first flange (510) and the second flange (520).