Nanofiltration membrane assembly for water purification treatment

Abstract

The utility model discloses a nanofiltration membrane assembly for water purification treatment, which comprises a nanofiltration membrane assembly, a shell, a placing piece arranged on the shell and used for placing the nanofiltration membrane assembly, and a liquid inlet pipe and a liquid outlet pipe symmetrically arranged in the middles of two ends of the shell, the placing piece comprises a top plate, sliding plates arranged at the two ends of the lifting plate, the lifting plate, a limiting mechanism and a reset mechanism, the top plate and the lifting plate are symmetrically arranged at the upper and lower ends of the sliding plates, the two ends of the top plate and the lifting plate are arranged on the sliding plates arranged at the two ends of the lifting plate respectively, and the sliding plates are in sliding fit with the upper and lower side walls of the shell. According to the utility model, the two nanofiltration membrane assemblies can be arranged up and down at the same time, and when the blocked nanofiltration membrane assembly is replaced, the normal work of the other nanofiltration membrane assembly can be ensured, so that the purpose of replacing the nanofiltration membrane assembly without shutdown can be achieved, and the replacement efficiency of the nanofiltration membrane assembly and the water purification efficiency are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nanofiltration membrane technical field, especially relate to nanofiltration membrane assembly for water purification treatment. BACKGROUND

[0002] Nanofiltration (NF) is a new type of membrane separation technology between reverse osmosis and ultrafiltration developed in the late 1980s, which is a new type of pressure-driven membrane separation technology developed to meet the needs of industrial water softening and reduce costs. Nanofiltration is a liquid-liquid separation method under the action of pressure difference, and small molecules are permeated through nanofiltration membranes, while large molecules are retained. It is also called low-pressure reverse osmosis. The molecular weight cut-off range of nanofiltration membrane is usually 200-1000 MWCO, between ultrafiltration and reverse osmosis, mainly applied to the concentration and purification of macromolecular substances in solution. Nanofiltration membrane separation water treatment system has unique structure and performance, and has rapidly developed in the fields of environmental protection and water resource regeneration. It has been well developed in the fields of textile, power, food, metallurgy, petroleum, machinery, biology, pharmaceutical and fermentation, and has wide application prospect.

[0003] Through the search of the Chinese patent with the application number 202420770498.9, a nanofiltration membrane assembly is disclosed, which includes a shell with two groups of grooves inside. Two groups of nanofiltration membrane assemblies can be detachably connected in the grooves, and the two groups of nanofiltration membrane assemblies are used for purifying water. A through hole is formed between the two groups of grooves. The shell is fixedly connected with a liquid inlet hole on one side. When in use, the shell cover is opened by the hinge, and the nanofiltration membrane assembly is placed in the groove. Then the liquid is injected into the shell from the position of the liquid inlet hole. After being purified by the first group of nanofiltration membrane assemblies, the liquid enters the other group of nanofiltration membrane assemblies through the through hole for purification. After secondary purification, the liquid is discharged from the liquid outlet hole. The nanofiltration membrane assembly inside can be replaced. The device achieves the effect of secondary purification of liquid and ensures the purity of water. Although the device can replace the nanofiltration membrane assembly, it needs to stop working before replacing the clogged nanofiltration membrane, which greatly reduces the efficiency of water purification. UTILITY MODEL CONTENTS

[0004] The utility model aims to overcome the defects in the prior art, and provides a nanofiltration membrane assembly for water purification treatment. The placing piece can simultaneously arrange two nanofiltration membrane assemblies. When replacing the clogged nanofiltration membrane assembly, the other nanofiltration membrane assembly can work normally, so that the nanofiltration membrane assembly can be replaced without stopping working, which greatly improves the replacement efficiency of the nanofiltration membrane assembly and the efficiency of water purification.

[0005] To achieve the above object, the utility model adopts the technical scheme of:

[0006] The utility model provides a nanofiltration membrane module for water purification treatment, including nanofiltration membrane module, shell, the placing piece for placing nanofiltration membrane module of setting in shell, the liquid inlet pipe and liquid outlet pipe of symmetry setting in the middle part of both ends of shell, the placing piece includes top plate, the sliding plate of setting in the both ends of lifting plate, lifting plate, limiting mechanism and reset mechanism, top plate and lifting plate symmetry setting in the both ends of sliding plate, and the both ends of top plate, lifting plate are respectively with the sliding plate of setting in the both ends of lifting plate, sliding plate and the upper and lower two side walls of shell slide fit, limiting mechanism sets up at the top of shell, and limiting mechanism is cooperated with top plate, reset mechanism sets up at the bottom of shell, and reset mechanism is cooperated with lifting plate, and nanofiltration membrane module sets up between the sliding plate of both sides of lifting plate, and nanofiltration membrane module sets up in the center line both sides of sliding plate.

[0007] Preferably, the upper and lower sides of the liquid inlet pipe and the liquid outlet pipe at the middle of the both ends of the shell are provided with through holes, and sealing covers are arranged in the through holes. The through holes facilitate the replacement and installation of the blocked nanofiltration membrane module, and the sealing covers not only seal the through holes, but also position the nanofiltration membrane module to prevent the end of the nanofiltration membrane module from interfering with the inner wall of the through hole.

[0008] Preferably, the placing piece further comprises a mounting block, the mounting block is arranged between the sliding plates at the both ends of the lifting plate, and the both ends of the mounting block are connected with the sliding plates. Arc-shaped grooves for mounting the nanofiltration membrane module are formed in the upper and lower sides of the mounting block. The mounting block can support the nanofiltration membrane module, ensuring the safety and stability of the nanofiltration membrane module during operation.

[0009] Preferably, the limiting mechanism comprises a guide rail, a supporting block, a moving plate, and a hand screw bolt. The guide rail is fixedly installed at the top of the shell. A sliding groove is formed in the bottom of the supporting block and slidably connected with the guide rail. The moving plate is fixedly installed on one side of the supporting block. The hand screw bolt is installed on the moving plate and cooperates with the guide rail. An inclined surface is arranged on one side of the supporting block. When replacing the nanofiltration membrane module on the upper side, the limiting mechanism can limit the top plate to prevent the other nanofiltration membrane module from being in the working state during the replacement of the nanofiltration membrane module.

[0010] Preferably, the reset mechanism comprises a telescopic rod and a spring. The both ends of the telescopic rod are fixedly installed at the bottom of the shell and the lifting plate, respectively. The spring is sleeved on the telescopic rod. The telescopic rod and the spring can reset the placing piece, ensure that the nanofiltration membrane module on the upper side can be connected with the liquid inlet pipe and the liquid outlet pipe arranged at the both ends of the shell, and ensure the normal operation of the nanofiltration membrane module.

[0011] Preferably, the fixing mechanism further comprises a gear, a first gear rack, a second gear rack, a first arc-shaped plate, a second arc-shaped plate, a first sliding rod, a second sliding rod and an adjusting piece, the gear is rotatably installed on one of the sliding plates through a rotating shaft, the first gear rack and the second gear rack are symmetrically arranged on the two sides of the gear, the first gear rack and the second gear rack are engaged with the gear, the first arc-shaped plate is connected with the first gear rack through the first sliding rod, the second arc-shaped plate is connected with the second gear rack through the second sliding rod, an installation groove is formed in the end side of one of the sliding plates, the adjusting piece is arranged in the installation groove and connected with the first gear rack, and the fixing mechanism can cooperate with the two nanofiltration membrane assemblies arranged on the upper and lower sides of the installation block to fix the nanofiltration membrane assemblies on the installation block, so that the safety and stability of the nanofiltration membrane assemblies during operation are ensured.

[0012] Preferably, a groove is formed in the middle of one of the sliding plates, strip-shaped grooves are formed on the two sides of the center line of the groove, strip-shaped holes are formed in the side walls of the strip-shaped grooves, the gear is arranged in the groove, the first gear rack and the second gear rack are slidably arranged in the strip-shaped grooves on the two sides of the center line of the groove, and the first sliding rod and the second sliding rod are slidably connected with the strip-shaped holes in the side walls of the strip-shaped grooves on the two sides of the center line of the groove, so that the gear, the first gear rack and the second gear rack are conveniently installed, and the safety and stability of the first gear rack and the second gear rack during operation are ensured.

[0013] Preferably, the adjusting piece comprises a threaded rod and a handle, a bent portion is fixedly installed on the top of the first gear rack, the threaded rod is rotatably installed in the installation groove, the bent portion is threadedly connected with the threaded rod, and the handle is fixedly installed on the top of the threaded rod, so that the threaded rod and the handle can fix the first gear rack and ensure the normal operation of the fixing mechanism.

[0014] Preferably, the fixing mechanism further comprises a guide piece, the guide piece comprises a sealing gasket, a guide plate and a guide rod, the guide plate is arranged at the two ends of the housing and symmetrically arranged on the two sides of the center line of the housing, a limiting groove is formed in the guide plate, the sealing gasket is symmetrically arranged at the two ends of the nanofiltration membrane assembly and slidably arranged in the limiting groove, the guide rod is fixedly installed in the limiting groove and slidably connected with the sealing gasket, installation holes are formed in the two sides of the center line of the sealing gasket and matched with the nanofiltration membrane assembly, the sealing gasket can be matched with the through holes in the housing, the sealing gasket can seal the through holes on the upper and lower sides of the liquid inlet pipe and the liquid outlet pipe, and the purified water to be purified can be prevented from being input into the housing from the liquid inlet pipe when the nanofiltration membrane assembly is replaced, so that the normal use of the device is ensured.

[0015] The device has the advantages that:

[0016] 1) The device placing piece can set two nanofiltration membrane assemblies at the same time, when replacing the blocked nanofiltration membrane assembly, the other nanofiltration membrane assembly can work normally, so that the nanofiltration membrane assembly can be replaced without stopping, and the efficiency of replacing the nanofiltration membrane assembly and water purification is greatly improved.

[0017] 2) The sealing cover of the device can not only block the through hole, but also position the nanofiltration membrane assembly, so that the end of the nanofiltration membrane assembly does not interfere with the inner wall of the through hole.

[0018] 3) The installation block of the device can support the nanofiltration membrane assembly, so that the safety and stability of the nanofiltration membrane assembly during work are guaranteed.

[0019] 4) When replacing the upper nanofiltration membrane assembly, the limiting mechanism can limit the top plate, so that the other nanofiltration membrane assembly is always in working state when the nanofiltration membrane assembly is replaced.

[0020] 5) The extension rod and the spring of the device can reset the placing piece, so that the nanofiltration membrane assembly on the upper side can be connected with the liquid inlet pipe and the liquid outlet pipe arranged at both ends of the shell, and the normal work of the nanofiltration membrane assembly is guaranteed.

[0021] 6) The fixing mechanism of the device can cooperate with the two nanofiltration membrane assemblies arranged on the upper and lower sides of the installation block to fix the nanofiltration membrane assemblies on the installation block, so that the safety and stability of the nanofiltration membrane assemblies during work are guaranteed.

[0022] 7) The recess and the strip-shaped groove of the device facilitate the installation of the gear, the first rack and the second rack, and can guarantee the safety and stability of the first rack and the second rack during work.

[0023] 8) The threaded rod and the handle of the device can fix the first rack, so that the normal work of the fixing mechanism is guaranteed.

[0024] 9) The sealing gasket of the device can cooperate with the through hole on the shell, and the sealing gasket can seal the liquid inlet pipe, the liquid outlet pipe and the through holes arranged on the upper and lower sides of the liquid inlet pipe and the liquid outlet pipe, so that the purified water needed for purification is prevented from being input into the shell from the liquid inlet pipe during replacement of the nanofiltration membrane assembly, and the normal use of the device is affected.

[0025] 10) The device. BRIEF DESCRIPTION OF DRAWINGS

[0026] ATTACHMENT Figure 1 is a structural schematic diagram of the utility model.

[0027] ATTACHMENTFigure 2 Is the structure diagram of through hole in the utility model.

[0028] Attached Figure 3 Is the internal structure diagram of the shell in the utility model.

[0029] Attached Figure 4 Is the installation structure diagram of reset mechanism in the utility model.

[0030] Attached Figure 5 Is the installation structure diagram of limiting mechanism in the utility model.

[0031] Attached Figure 6 Is the structure diagram of reset mechanism in the utility model.

[0032] Attached Figure 7 Is the installation structure diagram of mounting block in the utility model.

[0033] Attached Figure 8 Is the structure diagram of guide in the utility model.

[0034] Attached Figure 9 Is the installation structure diagram of fixing mechanism in the utility model.

[0035] Attached Figure 10 Is the utility model Figure 9 A enlarged view of the place.

[0036] In the figure:

[0037] 1, shell;101, through hole;

[0038] 2, sealing cover;

[0039] 3, liquid outlet pipe;

[0040] 4, placing piece;401, top plate;402, limiting mechanism;403, sliding plate;404, reset mechanism;405, lifting plate;406, moving plate;407, sliding slot;408, support block;409, hand screw;4010, guide rail;4011, spring;4012, telescopic rod;4013, installation groove;4014, mounting block;4015, arc slot;

[0041] 5, liquid inlet pipe;

[0042] 6, nanofiltration membrane assembly;

[0043] 7, guide;701, guide plate;702, guide rod;703, limiting slot;704, sealing gasket;705, mounting hole;

[0044] 8. Fixing mechanism; 801. First arc-shaped plate; 802. Adjusting component; 803. Second rack; 804. Strip hole; 805. Second arc-shaped plate; 806. Second sliding rod; 807. Strip groove; 808. Gear; 809. Groove; 8010. First rack; 8011. First sliding rod; 8012. Bending; 8013. Handle; 8014. Threaded rod. Detailed Implementation

[0045] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] like Figure 1 As shown, a nanofiltration membrane module for water purification includes a nanofiltration membrane module 6, a housing 1, a placement member 4 disposed on the housing 1 for placing the nanofiltration membrane module 6, and an inlet pipe 5 and an outlet pipe 3 symmetrically disposed at the middle of both ends of the housing 1. The arrangement of the inlet pipe 5 and the outlet pipe 3 facilitates connection to external pipelines, thereby improving the installation efficiency and installation quality of the device.

[0048] like Figure 3 , Figure 4 , Figure 5 , Figure 6As shown in the drawings, the placing piece 4 comprises a top plate 401, sliding plates 403 arranged at both ends of a lifting plate 405, the lifting plate 405, a limiting mechanism 402 and a reset mechanism 404, the top plate 401 and the lifting plate 405 are symmetrically arranged at the upper and lower ends of the sliding plates 403, the two ends of the top plate 401 and the lifting plate 405 are respectively arranged on the sliding plates 403 arranged at both ends of the lifting plate 405, the sliding plates 403 are in sliding fit with the upper and lower two side walls of the shell 1, the limiting mechanism 402 is arranged at the top of the shell 1 and cooperates with the top plate 401, the reset mechanism 404 is arranged at the bottom of the shell 1 and cooperates with the lifting plate 405, a nanofiltration membrane assembly 6 is arranged between the sliding plates 403 at both sides of the lifting plate 405, and the nanofiltration membrane assembly 6 is arranged on the center line of the sliding plate 403.

[0049] As a further optimization scheme of the utility model, as shown in the drawings, Figure 2 As shown in the drawings, the upper and lower sides of the liquid inlet pipe 5 and the liquid outlet pipe 3 at the middle of both ends of the shell 1 are provided with through holes 101, and sealing covers 2 are arranged in the through holes 101.

[0050] The arrangement of the through holes 101 facilitates the replacement and installation of the blocked nanofiltration membrane assembly 6, the arrangement of the sealing covers 2 not only enables the through holes 101 to be plugged, but also enables the nanofiltration membrane assembly 6 to be positioned, thereby preventing the end of the nanofiltration membrane assembly 6 from interfering with the inner wall of the through hole 101.

[0051] As a further optimization scheme of the utility model, as shown in the drawings, Figure 7 As shown in the drawings, the placing piece 4 further comprises mounting blocks 4014, the mounting blocks 4014 are arranged between the sliding plates 403 at both ends of the lifting plate 405, and the two ends of the mounting blocks 4014 are connected with the sliding plates 403, and arc-shaped grooves for mounting the nanofiltration membrane assembly 6 are formed on the upper and lower sides of the mounting blocks 4014.

[0052] The arrangement of the mounting blocks 4014 can support the nanofiltration membrane assembly 6, thereby ensuring the safety and stability of the nanofiltration membrane assembly 6 during the working process.

[0053] As a further optimization scheme of the utility model, as shown in the drawings, Figure 5 As shown in the drawings, the limiting mechanism 402 comprises guide rails 4010, supporting blocks 408, a moving plate 406 and hand screws 409, the guide rails 4010 are fixedly installed at the top of the shell 1, a sliding groove 407 is formed in the bottom of the supporting block 408, the sliding groove 407 is in sliding fit with the sliding rail, the moving plate 406 is fixedly installed on one side of the supporting block 408, the hand screws 409 are installed on the moving plate 406 and cooperate with the guide rails 4010, and an inclined surface is arranged on one side of the supporting block 408, which is used for replacing the nanofiltration membrane assembly 6 on the upper side.

[0054] The limiting mechanism 402 can limit the top plate 401, and prevent another nanofiltration membrane assembly 6 from being in working state when the nanofiltration membrane assembly 6 is replaced.

[0055] As a further optimization scheme of the utility model, as shown in Figure 6 The reset mechanism 404 comprises a telescopic rod 4012 and a spring 4011, both ends of the telescopic rod 4012 are fixedly installed on the bottom of the shell 1 and the lifting plate 405 respectively, and the spring 4011 is sleeved on the telescopic rod 4012.

[0056] The telescopic rod 4012 and the spring 4011 can reset the placing piece 4, ensure that the nanofiltration membrane assembly 6 located above can be communicated with the liquid inlet pipe 5 and the liquid outlet pipe 3 arranged at both ends of the shell 1, and ensure normal working of the nanofiltration membrane assembly 6.

[0057] As a further optimization scheme of the utility model, as shown in Figure 9 The fixing mechanism 8 comprises a gear 808, a first rack 8010, a second rack 803, a first arc-shaped plate 801, a second arc-shaped plate 805, a first sliding rod 8011, a second sliding rod 806 and an adjusting piece 802, the gear 808 is rotatably installed on one of the sliding plates 403 through a rotating shaft, the first rack 8010 and the second rack 803 are symmetrically arranged on the two sides of the gear 808, the first rack 8010 and the second rack 803 are engaged with the gear 808, the first arc-shaped plate 801 is connected with the first rack 8010 through the first sliding rod 8011, the second arc-shaped plate 805 is connected with the second rack 803 through the second sliding rod 806, an installation groove is formed in one end of the side of one of the sliding plates 403, the adjusting piece 802 is arranged in the installation groove, and the adjusting piece 802 is connected with the first rack 8010.

[0058] The first rack 8010 moves to drive the gear 808 to rotate, the gear 808 rotates to drive the second rack 803 to move, so that the first rack 8010 and the second rack 803 are simultaneously moved, and the first rack 8010 and the second rack 803 move to drive the first arc-shaped plate 801 installed on the first sliding rod 8011 and the second arc-shaped plate 805 installed on the second sliding rod 806 to move, so that the nanofiltration membrane assembly 6 is fixed or unfixed.

[0059] The fixing mechanism 8 can cooperate with the two nanofiltration membrane assemblies 6 arranged on the upper and lower sides of the mounting block 4014 to fix the nanofiltration membrane assembly 6 on the mounting block, so that the safety and stability of the nanofiltration membrane assembly 6 during working are ensured.

[0060] As a further optimization scheme of the utility model, as shown in Figure 9 As shown in the figure, the recess 809 is opened in the middle of one of the sliding plates 403, the strip-shaped grooves 807 are opened on both sides of the center line of the recess 809, the strip-shaped holes 804 are opened on the side walls of the strip-shaped grooves 807, the gear 808 is arranged in the recess 809, the first rack 8010 and the second rack 803 are respectively arranged in the strip-shaped grooves 807 on both sides of the center line of the recess 809 in a sliding mode, and the first sliding rod 8011 and the second sliding rod 806 are respectively in sliding cooperation with the strip-shaped holes 804 on the side walls of the strip-shaped grooves 807 on both sides of the center line of the recess 809.

[0061] The arrangement of the recess 809 and the strip-shaped grooves 807 facilitates the installation of the gear 808, the first rack 8010 and the second rack 803, and can ensure the safety and stability of the first rack 8010 and the second rack 803 during the working process.

[0062] As a further optimization scheme of the utility model, as shown in Figure 10 As shown in the figure, the adjusting member 802 comprises a threaded rod 8014 and a handle 8013, the first rack 8010 is fixedly installed on the top of the bending 8012, the threaded rod 8014 is rotatably installed in the installation groove, the bending 8012 is in threaded cooperation with the threaded rod 8014, and the handle 8013 is fixedly installed on the top of the threaded rod 8014.

[0063] The arrangement of the threaded rod 8014 and the handle 8013 can achieve the purpose of fixing the first rack 8010, and ensure the normal working of the fixing mechanism 8.

[0064] As a further optimization scheme of the utility model, as shown in Figure 8 As shown in the figure, the utility model further comprises a guide member 7, the guide member 7 comprises a sealing gasket 704, a guide plate 701 and a guide rod 702, the guide plate 701 is arranged at both ends of the shell 1 and is symmetrically arranged on both sides of the center line of the shell 1, a limiting groove 703 is opened in the guide plate 701, the sealing gasket 704 is symmetrically arranged at both ends of the nanofiltration membrane assembly 6 and is arranged in the limiting groove 703 in a sliding mode, the guide rod 702 is fixedly installed in the limiting groove 703 and is in sliding cooperation with the sealing gasket 704, installation holes 705 are opened on both sides of the center line of the sealing gasket 704, the installation holes 705 are matched with the nanofiltration membrane assembly 6, and the sealing gasket 704 is matched with the through hole 101 on the shell 1.

[0065] The arrangement of the sealing gasket 704 can achieve the purpose of sealing the liquid inlet pipe 5, the liquid outlet pipe 3 and the through hole 101 opened on both sides of the liquid inlet pipe 5 and the liquid outlet pipe 3, and prevent the purified water needing to be purified from being input into the shell 1 from the liquid inlet pipe 5 when the nanofiltration membrane assembly 6 is replaced, thereby affecting the normal use of the device.

[0066] The working process is as follows:

[0067] When the nanofiltration membrane assembly 6 located above the center line of the sliding plate 403 needs to be replaced, the moving plate 406 is pushed to move the supporting block 408 to the side close to the top plate 401 until the top of the supporting block 408 is in contact with the bottom of the top plate 401, the supporting block 408 is moved to the appropriate position, and the hand screw 409 is rotated to fix the moving plate 406 on the guide rail 4010;

[0068] The handle 8013 is rotated to drive the threaded rod 8014 to rotate, the threaded rod 8014 is rotated to drive the bending 8012 to move upward, the bending 8012 moves upward to drive the first rack 8010 to move upward, the first rack 8010 moves upward to drive the first sliding rod 8011 and the first arc-shaped plate 801 to move upward, so as to contact and fix the nanofiltration membrane assembly 6, the sealing cover 2 at the through hole 101 above the center line of the shell 1 is removed, the nanofiltration membrane assembly 6 to be replaced is pushed from one end of the shell 1 by a tool, and the nanofiltration membrane is pulled out from the other end of the shell 1 for replacement or cleaning.

[0069] The nanofiltration membrane assembly 6 to be replaced is inserted into the shell 1 from one end of the shell 1 until the other end of the nanofiltration membrane assembly 6 is inserted into the corresponding mounting hole 705 on the sealing gasket 704 on the guide 7 at the other end of the shell 1, after the installation is completed, the sealing cover 2 on both sides of the shell 1 is placed into the corresponding through hole 101 on the shell 1, and the sealing cover 2 is placed into the through hole 101 at the same time to position the nanofiltration membrane assembly 6;

[0070] After positioning is completed, the handle 8013 is reversely rotated to drive the bending 8012 to move downward, the bending 8012 moves downward to drive the first rack 8010 to move downward, the first rack 8010 moves downward to drive the first sliding rod 8011 and the first arc-shaped plate 801 to move downward, until the first arc-shaped plate 801 cooperates with the mounting block to fix the nanofiltration membrane assembly 6 on the mounting block, so as to ensure the safety and stability of the nanofiltration membrane assembly 6 in the working process.

[0071] The above content is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as they do not deviate from the range defined by the structure of the utility model, and belong to the protection range of the utility model.

Claims

1. A nanofiltration membrane module for water purification treatment, comprising a nanofiltration membrane module, a housing, a placement member provided on the housing for placing the nanofiltration membrane module, and a liquid inlet pipe and a liquid outlet pipe symmetrically provided at the middle of both ends of the housing, characterized in that, The placing piece comprises a top plate, sliding plates arranged at both ends of a lifting plate, the lifting plate, a limiting mechanism and a resetting mechanism, the top plate and the lifting plate are symmetrically arranged at the upper and lower ends of the sliding plates, the top plate and the lifting plate are arranged on the sliding plates arranged at both ends of the lifting plate, the sliding plates are in sliding fit with the upper and lower side walls of the shell, the limiting mechanism is arranged at the top of the shell and is in fit with the top plate, the resetting mechanism is arranged at the bottom of the shell and is in fit with the lifting plate, a nanofiltration membrane assembly is arranged between the sliding plates at both sides of the lifting plate, and the nanofiltration membrane assembly is arranged on both sides of the center line of the sliding plate.

2. The nanofiltration membrane module for water purification treatment according to claim 1, wherein The upper and lower sides of the liquid inlet pipe and the liquid outlet pipe at the middle of both ends of the shell are provided with through holes, and sealing covers are arranged in the through holes.

3. The nanofiltration membrane module for water purification treatment according to claim 1, wherein The placing piece further comprises mounting blocks arranged between the sliding plates at both ends of the lifting plate, and the ends of the mounting blocks are connected with the sliding plates, and arc-shaped grooves for mounting the nanofiltration membrane assembly are arranged on the upper and lower sides of the mounting blocks.

4. The nanofiltration membrane module for water purification treatment according to claim 3, wherein The limiting mechanism comprises a guide rail, a supporting block, a moving plate and a hand screw bolt, the guide rail is fixedly installed at the top of the shell, a sliding groove is arranged at the bottom of the supporting block and is in sliding fit with the sliding rail, the moving plate is fixedly installed at one side of the supporting block, the hand screw bolt is installed on the moving plate and is in fit with the guide rail, and an inclined surface is arranged at one side of the supporting block.

5. The nanofiltration membrane module for water purification treatment according to claim 3, wherein The resetting mechanism comprises a telescopic rod and a spring, the ends of the telescopic rod are fixedly installed at the bottom of the shell and on the lifting plate respectively, and the spring is sleeved on the telescopic rod.

6. The nanofiltration membrane module for water purification treatment according to claim 3, wherein The fixing mechanism comprises a gear, first and second racks, first and second arc-shaped plates, first and second sliding rods and an adjusting piece, the gear is rotatably installed on one of the sliding plates through a rotating shaft, the first and second racks are symmetrically arranged at both sides of the gear and are in mesh with the gear, the first arc-shaped plate is connected with the first rack through the first sliding rod, the second arc-shaped plate is connected with the second rack through the second sliding rod, an installation groove is formed at one end of one of the sliding plates, and the adjusting piece is arranged in the installation groove and is connected with the first rack.

7. The nanofiltration membrane module for water purification treatment according to claim 6, wherein A groove is formed in the middle of one of the sliding plates, strip-shaped grooves are formed at both sides of the center line of the groove, strip-shaped holes are formed in the side walls of the strip-shaped grooves, the gear is arranged in the groove, the first and second racks are slidably arranged in the strip-shaped grooves at both sides of the center line of the groove, and the first and second sliding rods are in sliding fit with the strip-shaped holes in the side walls of the strip-shaped grooves at both sides of the center line of the groove.

8. The nanofiltration membrane module for water purification treatment according to claim 6, wherein The adjusting piece comprises a threaded rod and a handle, a bent portion is fixedly installed at the top of the first rack, the threaded rod is rotatably installed in the installation groove, the bent portion is in threaded fit with the threaded rod, and the handle is fixedly installed at the top of the threaded rod.

9. The nanofiltration membrane module for water purification treatment according to claim 1, wherein Further comprise a guide, the guide comprises a sealing pad, a guide plate and a guide rod, the guide plate is arranged at both ends of the shell, and the guide plates are symmetrically arranged on both sides of the center line of the shell, a limiting groove is opened on the guide plate, the sealing pad is symmetrically arranged at both ends of the nanofiltration membrane assembly, the sealing pad is slidingly arranged in the limiting groove, the guide rod is fixedly installed in the limiting groove, the sealing pad is in sliding fit with the guide rod, mounting holes are opened on both sides of the center line of the sealing pad, the mounting holes are matched with the nanofiltration membrane assembly, and the sealing pad is matched with the through hole on the shell.

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