CN220485407U - Bitter two-stage nanofiltration device - Google Patents
Bitter two-stage nanofiltration device Download PDFInfo
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- CN220485407U CN220485407U CN202322028687.7U CN202322028687U CN220485407U CN 220485407 U CN220485407 U CN 220485407U CN 202322028687 U CN202322028687 U CN 202322028687U CN 220485407 U CN220485407 U CN 220485407U
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- water
- nanofiltration
- nanofiltration device
- stage
- water cavity
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- 238000001728 nano-filtration Methods 0.000 title claims abstract description 162
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 153
- 239000012528 membrane Substances 0.000 claims abstract description 50
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 2
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000000746 purification Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a brackish water double-stage nanofiltration device, which comprises a first-stage nanofiltration device and a second-stage nanofiltration device, wherein the first-stage nanofiltration device and the second-stage nanofiltration device both comprise a concentrated water cavity and a clear water cavity which are separated by nanofiltration membranes, the concentrated water cavity of the first-stage nanofiltration device is connected with a water inlet pipe through a pretreatment filtration device, a driving pump is arranged on the water inlet pipe, the clear water cavity of the first-stage nanofiltration device is connected with the concentrated water cavity of the second-stage nanofiltration device, the clear water cavity of the second-stage nanofiltration device is connected with a water production pipe, the concentrated water cavity of the first-stage nanofiltration device is connected with the water inlet pipe through a first return pipeline, the concentrated water cavity of the second-stage nanofiltration device is connected with the concentrated water cavity of the first-stage nanofiltration device through a second return pipeline, and the first return pipeline and the second return pipeline are both provided with one-way valves; meanwhile, the bitter water can be filtered for multiple times and then discharged, so that the waste of water resources caused by direct discharge is avoided.
Description
Technical Field
The utility model relates to the technical field of brackish water treatment, in particular to a two-stage nanofiltration device for brackish water.
Background
The water resources of China are in shortage and uneven, particularly in northwest areas, many water sources are brackish, and long-term drinking of brackish water which is not effectively purified can cause huge damage to human bodies, so that rural safe drinking water engineering is established in many rural areas in China, wherein the nanofiltration technology is gradually the main flow technology adopted by water purifying equipment, and the deep purification of drinking water can be realized.
Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration, the pore diameter range of the nanofiltration membrane is about a few nanometers, the trapped molecular weight is 80-1000, and the nanofiltration membrane is used for separating substances with smaller relative molecular mass, such as inorganic salts or small molecular organic matters such as glucose and sucrose, from solvents, so that the separation effect is achieved; nanofiltration is mainly applied to the purification of drinking water and industrial water, the purification treatment of waste water, the concentration of valuable components in process fluid and the like.
However, the conventional nanofiltration device for drinking water is only provided with one-stage nanofiltration, has poor purification effect and lower efficiency in the filtration process, and the filtered concentrated water is directly discharged and is not recycled, so that the waste of water resources is easily caused; meanwhile, the nanofiltration membrane of the existing nanofiltration equipment is simple in structure, so that the contact area between the nanofiltration membrane and water in the filtration process is small, and the filtration efficiency is affected.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a brackish water double-stage nanofiltration device, which solves the problems that the existing nanofiltration equipment is low in filtration efficiency and water resource waste is easy to cause.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a brackish water doublestage nanofiltration device, it includes one-level nanofiltration equipment and second grade nanofiltration equipment, one-level nanofiltration equipment and second grade nanofiltration equipment all include through nanofiltration membrane partition's dense water cavity and clear water chamber, one-level nanofiltration equipment's dense water cavity passes through pretreatment filtration equipment and water piping connection, and be provided with the actuating pump on the inlet tube, one-level nanofiltration equipment's clear water cavity is connected with second grade nanofiltration equipment's dense water cavity, second grade nanofiltration equipment's clear water cavity is connected with producing water pipe, one-level nanofiltration equipment's dense water cavity passes through first return line and water piping connection, second grade nanofiltration equipment's dense water cavity passes through second return line and one-level nanofiltration equipment's dense water cavity is connected, all be provided with the check valve on first return line and the second return line.
Further, the first-level nanofiltration equipment and the second-level nanofiltration equipment all comprise a shell, a mounting plate is arranged in the shell, a plurality of water passing holes are formed in the mounting plate, a nanofiltration membrane component is arranged at one end of each water passing hole, the nanofiltration membrane component is located in a concentrated water cavity, the nanofiltration membrane component comprises a cylindrical nanofiltration membrane, plugs and lantern rings are respectively arranged at two ends of the cylindrical nanofiltration membrane, the outer wall of the lantern rings is fixedly connected with the inner wall of each water passing hole through screw threads, and the inner cavity of the cylindrical nanofiltration membrane is communicated with the clear water cavity through the water passing holes.
Further, the outer side wall and the inner side wall of the cylindrical nanofiltration membrane are respectively provided with a supporting steel net, and two ends of the supporting steel net are respectively fixed on the plug and the lantern ring.
Further, the front end of the housing is provided with a detachable end cap.
Further, clear water cavity and backwash pipe connection of second grade nanofiltration equipment, and be provided with the backwash pump on the backwash pipe, be provided with out the water branch road on the connecting line between actuating pump and the preliminary treatment filtration equipment, all be provided with the drain pipe on the dense water cavity of one-level nanofiltration equipment and second grade nanofiltration equipment, go out water branch road, the drain pipe, produce the water pipe, first return line, the second return line, the play water end of actuating pump and the play water end of backwash pump are provided with the ooff valve, the ooff valve of actuating pump is located the front end of play water branch road.
Further, the water outlet ends of the driving pump and the backwashing pump are respectively provided with an automatic pressure regulating valve, and the side walls of the concentrated water cavities of the primary nanofiltration equipment and the secondary nanofiltration equipment are respectively provided with a pressure gauge.
Further, the pretreatment filter device comprises a filter screen, an activated carbon filter and/or a cartridge filter.
The beneficial effects of the utility model are as follows:
1. according to the scheme, the two-stage filtration is carried out on the brackish water through the first-stage nanofiltration equipment and the second-stage nanofiltration equipment, and compared with the single-stage nanofiltration, the purifying effect of the brackish water is improved; meanwhile, the concentrated water filtered by the first-stage nanofiltration equipment can flow back to the water inlet pipe through the first return pipeline, and the concentrated water filtered by the second-stage nanofiltration equipment can flow back to the first-stage nanofiltration equipment through the second return pipeline, so that the bitter water is discharged after being filtered for many times, and the waste of water resources caused by direct discharge is avoided.
2. By arranging a plurality of cylindrical nanofiltration membranes, the contact area between the nanofiltration membranes and water can be increased in a limited shell space, so that the filtration efficiency is improved; meanwhile, the cylindrical nanofiltration membrane is convenient to disassemble and assemble, so that later maintenance and replacement are facilitated; can support the tube-shape nanofiltration membrane through supporting the steel mesh, prevent that the lateral wall of tube-shape nanofiltration membrane from appearing sunken or bellied condition and leading to tube-shape nanofiltration membrane inefficacy when the pressurized filters.
3. The back flushing of the first-stage nanofiltration equipment, the second-stage nanofiltration equipment and the pretreatment filtration equipment can be realized by arranging the backwashing pipeline and the water outlet branch, the blockage of the equipment is avoided, and the purification efficiency and the purification effect of the device in normal operation are ensured.
Drawings
Fig. 1 is a schematic structural diagram of the bitter two-stage nanofiltration device.
Fig. 2 is a schematic structural diagram of a first stage nanofiltration device.
The device comprises a first-stage nanofiltration device, a second-stage nanofiltration device, a nanofiltration membrane, a 4-stage water concentration cavity, a 5-stage clear water cavity, a 6-stage pretreatment filtration device, a 7-stage water inlet pipe, a 8-stage drive pump, a 9-stage water outlet pipe, a 10-stage first return pipeline, a 11-stage second return pipeline, a 12-stage check valve, a 13-stage shell, a 14-stage mounting plate, a 15-stage water outlet hole, a 16-stage cylindrical nanofiltration membrane, a 17-stage plug, a 18-stage collar, a 19-stage end cover, a 20-stage backwash pipeline, a 21-stage backwash pump, a 22-stage water outlet branch, a 23-stage water outlet pipe, a 24-stage switch valve, a 25-stage automatic pressure regulating valve, a 26-stage pressure gauge.
Detailed Description
The following description of the embodiments of the present utility model is provided to facilitate understanding of the present utility model by those skilled in the art, but it should be understood that the present utility model is not limited to the scope of the embodiments, and all the utility models which make use of the inventive concept are protected by the spirit and scope of the present utility model as defined and defined in the appended claims to those skilled in the art.
Example 1
As shown in fig. 1, the brackish water two-stage nanofiltration device of the scheme comprises a first-stage nanofiltration device 1 and a second-stage nanofiltration device 2, wherein the first-stage nanofiltration device 1 and the second-stage nanofiltration device 2 respectively comprise a concentrated water cavity 4 and a clear water cavity 5 which are separated by a nanofiltration membrane 3, the concentrated water cavity 4 of the first-stage nanofiltration device 1 is connected with a water inlet pipe 7 through a pretreatment filtration device 6, a driving pump 8 is arranged on the water inlet pipe 7, the pretreatment filtration device 6 comprises a filter screen and an active carbon filter and/or a security filter, the clear water cavity 5 of the first-stage nanofiltration device 1 is connected with the concentrated water cavity 4 of the second-stage nanofiltration device 2, the clear water cavity 5 of the second-stage nanofiltration device 2 is connected with a water production pipe 9, the concentrated water cavity 4 of the first-stage nanofiltration device 1 is connected with the water inlet pipe 7 through a first return pipeline 10, the concentrated water cavity 4 of the second-stage nanofiltration device 2 is connected with the concentrated water cavity 4 of the first-stage nanofiltration device 1 through a second return pipeline 11, and a one-way valve 12 is arranged on the first return pipeline 10 and the second return pipeline 11 respectively, and a drain pipe 23 is arranged on the concentrated water cavity 4 of the first-stage nanofiltration device 1 and the second-stage nanofiltration device 2 respectively.
When in implementation, the aperture of the nanofiltration membrane 3 is 1-2 nm, the aperture of the nanofiltration membrane 3 in the primary nanofiltration equipment 1 is larger than the aperture of the nanofiltration membrane 3 in the secondary nanofiltration equipment 2, and the materials are polyamide materials, so that the nanofiltration membrane 3 has the advantages of good film forming property, heat stability, chemical stability, high mechanical strength, acid-base resistance, microorganism corrosion resistance, chlorine resistance and other oxidizing substances, high water flux and high salt rejection rate, colloid and suspended matter pollution resistance and low price; the operating pressure of the driving pump 8 is not higher than 0.85Mpa, the operating pressure of the primary nanofiltration device 1 is between 0.65 and 0.85Mpa, and the operating pressure of the secondary nanofiltration device 2 is between 0.5 and 0.65Mpa, which is favorable for preventing the nanofiltration membrane 3 from serious deformation, thereby prolonging the service life of the nanofiltration membrane 3.
According to the scheme, the first-stage nanofiltration equipment 1 and the second-stage nanofiltration equipment 2 are used for carrying out double-stage filtration on the brackish water, so that the purifying effect of the brackish water is improved compared with that of single-stage nanofiltration; meanwhile, the concentrated water filtered by the first-stage nanofiltration equipment 1 can flow back to the water inlet pipe 7 through the first return pipeline 10, and the concentrated water filtered by the second-stage nanofiltration equipment 2 can flow back to the first-stage nanofiltration equipment 1 through the second return pipeline 11, so that the brackish water is filtered for many times and then discharged through the water discharge pipe 23, and the waste of water resources caused by direct discharge is avoided.
Example 2
As shown in fig. 2, this embodiment provides a specific scheme of a first-stage nanofiltration device 1 and a second-stage nanofiltration device 2 on the basis of embodiment 1, wherein the first-stage nanofiltration device 1 and the second-stage nanofiltration device 2 have the same structure, each of which comprises a housing 13, a detachable end cover 19 is provided at the front end of the housing 13, a mounting plate 14 is provided in the housing 13, a plurality of water passing holes 15 are provided on the mounting plate 14, one end of the water passing holes 15 is provided with a nanofiltration membrane 3 assembly, and the nanofiltration membrane 3 assembly is located in the dense water cavity 4, the nanofiltration membrane 3 assembly comprises a cylindrical nanofiltration membrane 16, two ends of the cylindrical nanofiltration membrane 16 are respectively provided with a plug 17 and a collar 18, the outer wall of the collar 18 is fixedly connected with the inner wall of one end of the water passing hole 15 through a threaded fit, the inner cavity of the cylindrical nanofiltration membrane 16 is communicated with the clean water cavity 5 through the water passing holes 15, supporting steel meshes are provided on the outer side wall and the inner side wall of the cylindrical nanofiltration membrane 16, and two ends of the supporting steel meshes are respectively fixed on the plug 17 and the collar 18.
According to the scheme, the cylindrical nanofiltration membranes 16 are arranged, so that the contact area between the nanofiltration membranes 3 and water can be increased in a limited space of the shell 13, and the filtration efficiency is improved; meanwhile, the cylindrical nanofiltration membrane 16 is convenient to assemble and disassemble so as to facilitate later maintenance and replacement; the cylindrical nanofiltration membrane 16 can be supported through the supporting steel mesh, so that the failure of the cylindrical nanofiltration membrane 16 caused by the fact that the side wall of the cylindrical nanofiltration membrane 16 is concave or convex during pressure filtration is prevented.
Example 3
In this embodiment, on the basis of embodiment 1, further limitation is made, the clean water cavity 5 of the secondary nanofiltration device 2 is connected with the backwash pipeline 20, the backwash pipeline 20 is provided with the backwash pump 21, the connecting pipeline between the driving pump 8 and the pretreatment filtration device 6 is provided with the water outlet branch 22, the water outlet pipe 23, the water producing pipe 9, the first return pipeline 10, the second return pipeline 11, the water outlet end of the driving pump 8 and the water outlet end of the backwash pump 21 are all provided with the switch valve 24, the switch valve 24 of the driving pump 8 is positioned at the front end of the water outlet branch 22, the water outlet ends of the driving pump 8 and the backwash pump 21 are both provided with the automatic pressure regulating valve 25, and the side walls of the concentrated water cavities 4 of the primary nanofiltration device 1 and the secondary nanofiltration device 2 are both provided with the pressure gauge 26.
The back flushing to the first-stage nanofiltration equipment 1, the second-stage nanofiltration equipment 2 and the pretreatment filtration equipment 6 can be realized through setting up backwash pipeline 20 and water outlet branch 22, and when back flushing is carried out, drain pipe 23, water production pipe 9, first return pipeline 10, second return pipeline 11 and the on-off valve 24 of the water outlet end of driving pump 8 are closed, the water flow of back flushing is made to pass through clear water cavity 5 of second-stage nanofiltration equipment 2, dense water cavity 4, clear water cavity 5 of first-stage nanofiltration equipment 1, dense water cavity 4, after pretreatment filtration equipment 6 in proper order, discharge through water outlet branch 22, reach the purpose of wasing whole filtration equipment, avoid the jam of equipment, purification efficiency and purifying effect when guaranteeing this scheme device normal operation.
Claims (6)
1. The utility model provides a brackish water doublestage nanofiltration device which characterized in that, including one-level nanofiltration device and second grade nanofiltration device, one-level nanofiltration device and second grade nanofiltration device all include through nanofiltration membrane partition's dense water cavity and clear water cavity, one-level nanofiltration device's dense water cavity is connected with the inlet tube through pretreatment filtration device, and is provided with the actuating pump on the inlet tube, one-level nanofiltration device's clear water cavity is connected with second grade nanofiltration device's dense water cavity, second grade nanofiltration device's clear water cavity is connected with the water production pipe, one-level nanofiltration device's dense water cavity is connected with the inlet tube through first return line, second grade nanofiltration device's dense water cavity is connected with one-level nanofiltration device's dense water cavity through the second return line, all be provided with the check valve on first return line and the second return line;
the one-level nanofiltration equipment and the two-level nanofiltration equipment comprise a shell, a mounting plate is arranged in the shell, a plurality of water passing holes are formed in the mounting plate, one end of each water passing hole is provided with a nanofiltration membrane component, the nanofiltration membrane component is located in a concentrated water cavity, the nanofiltration membrane component comprises a cylindrical nanofiltration membrane, plugs and lantern rings are respectively arranged at two ends of the cylindrical nanofiltration membrane, the outer wall of the lantern ring is fixedly connected with the inner wall of each water passing hole through screw thread fit, and an inner cavity of the cylindrical nanofiltration membrane is communicated with a clear water cavity through the water passing holes.
2. The two-stage nanofiltration device for brackish water according to claim 1, wherein the outer side wall and the inner side wall of the cylindrical nanofiltration membrane are respectively provided with a supporting steel mesh, and two ends of the supporting steel mesh are respectively fixed on the plug and the lantern ring.
3. The brackish water dual stage nanofiltration device of claim 1 wherein the front end of the housing is provided with a removable end cap.
4. The brackish water double-stage nanofiltration device according to claim 1, wherein the clear water cavity of the secondary nanofiltration device is connected with a backwash pipeline, a backwash pump is arranged on the backwash pipeline, a water outlet branch is arranged on a connecting pipeline between the driving pump and the pretreatment filtration device, drain pipes are arranged on the concentrated water cavities of the primary nanofiltration device and the secondary nanofiltration device, and a switch valve is arranged on the water outlet branch, the drain pipe, the water production pipe, the first return pipeline, the second return pipeline, the water outlet end of the driving pump and the water outlet end of the backwash pump, and the switch valve of the driving pump is arranged at the front end of the water outlet branch.
5. The brackish water double-stage nanofiltration device according to claim 4, wherein the water outlet ends of the driving pump and the backwash pump are provided with automatic pressure regulating valves, and the side walls of the concentrated water chambers of the primary nanofiltration device and the secondary nanofiltration device are provided with pressure gauges.
6. The brackish water dual stage nanofiltration device of claim 1 wherein the pretreatment filtration equipment comprises a filter screen, an activated carbon filter, and/or a cartridge filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322028687.7U CN220485407U (en) | 2023-07-28 | 2023-07-28 | Bitter two-stage nanofiltration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322028687.7U CN220485407U (en) | 2023-07-28 | 2023-07-28 | Bitter two-stage nanofiltration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220485407U true CN220485407U (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322028687.7U Active CN220485407U (en) | 2023-07-28 | 2023-07-28 | Bitter two-stage nanofiltration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220485407U (en) |
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2023
- 2023-07-28 CN CN202322028687.7U patent/CN220485407U/en active Active
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