CN217708979U - Electrodeionization compartment based on resin wafer filling - Google Patents
Electrodeionization compartment based on resin wafer filling Download PDFInfo
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- CN217708979U CN217708979U CN202221941566.0U CN202221941566U CN217708979U CN 217708979 U CN217708979 U CN 217708979U CN 202221941566 U CN202221941566 U CN 202221941566U CN 217708979 U CN217708979 U CN 217708979U
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Abstract
The utility model discloses an electrodeionization compartment based on resin wafer filling, which comprises an anode compartment, a fresh water compartment and a cathode compartment which are sequentially arranged along ion migration, wherein a plurality of repeating units are arranged between the fresh water compartment and the cathode compartment, and each repeating unit comprises a fresh water compartment and a concentrated water compartment; the anode compartment comprises an anode separator, an anode plate, a flow guide interlayer, a cation exchange resin wafer, a mixed ion exchange resin wafer and an anion exchange membrane; an anode plate is arranged on the anode separator, a cation exchange resin wafer, a mixed ion exchange resin wafer and an anion exchange membrane are sequentially arranged on the anode plate, and flow guide interlayers are arranged at two ends of the cation exchange resin wafer and the mixed ion exchange resin wafer. The utility model provides high ion exchange resin's regeneration rate has better desalination performance.
Description
Technical Field
The utility model belongs to the technical field of the water treatment, a electrodeionization compartment based on resin wafer is filled is related to.
Background
The ion exchange resin is used as an important component of an electrodeionization filling area, different types and filling modes of the ion exchange resin determine the electrodeionization desalting performance, and the filling mode of the existing electrodeionization membrane block is generally mixed filling or layered filling. The mixing and filling is to uniformly mix anion and cation exchange resins according to a certain proportion and fill the mixture into a fresh water chamber of the electrodeionization membrane stack. This packing method is such that, during the operation of the electrodeionization membrane module, water dissociation occurs mainly in the interfaces between the foreign resins and around the contact points between the foreign resins and the ion exchange membrane. Due to the mixed filling mode, the anisotropic contact points are widely distributed, water dissociation and resin regeneration are rapid, but the isotropic ion conduction path formed by isotropic resin particles is difficult to form, and the thickness of the fresh water chamber partition plate is limited.
The existing electrodeionization compartments are filled in a layered filling mode, wherein resins are filled in multiple layers, and each layer is only filled with the same type of resins. The filling mode can improve the conduction rate of ions with the same polarity, and can greatly improve the current density and the current efficiency. The distribution of water dissociation points in the contact area of the anisotropic resin of the layered filling film stack is concentrated, and the total contact area of the anisotropic resin is smaller than that of the mixed filling, so that the water dissociation degree of the layered filling film stack is smaller than that of the mixed filling film stack under certain conditions, and the whole regeneration of the resin is not facilitated.
SUMMERY OF THE UTILITY MODEL
Based on the problems in the prior art, it is an object of the present invention to provide an electrodeionization compartment based on resin wafer filling, which facilitates regeneration of the resin.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electrodeionization compartment based on resin wafer filling comprises an anode compartment, a fresh water compartment and a cathode compartment which are sequentially arranged along an ion migration direction, wherein a plurality of repeating units are arranged between the fresh water compartment and the cathode compartment, and each repeating unit comprises a fresh water compartment and a concentrated water compartment;
wherein the anode compartment comprises an anode separator, an anode plate, a flow guiding interlayer, a cation exchange resin wafer, a mixed ion exchange resin wafer and an anion exchange membrane; an anode plate is arranged on the anode separator, a cation exchange resin wafer, a mixed ion exchange resin wafer and an anion exchange membrane are sequentially arranged on the anode plate, the cation exchange resin wafer is attached to the anode plate, the mixed ion exchange resin wafer is attached to the cation exchange resin wafer, and the anion exchange membrane is attached to the mixed ion exchange resin wafer; flow guiding interlayers are arranged at two ends of the cation exchange resin wafer and the mixed ion exchange resin wafer.
The utility model is further improved in that one end of the anode clapboard is provided with an incoming water inlet and a concentrated water inlet, and the other end is provided with a produced water outlet, a concentrated water outlet and an electrode water outlet.
The utility model is further improved in that the thickness of the diversion interlayer is the same as the total thickness of the cation exchange resin wafer and the mixed ion exchange resin wafer.
The utility model is further improved in that the thickness of the cation exchange resin and the mixed ion exchange resin wafer is 3-6 mm.
The utility model is further improved in that the fresh water compartment comprises a fresh water chamber clapboard, an anion exchange type resin wafer, a mixed ion exchange type resin wafer, a cation exchange type resin wafer and a cation exchange membrane; the anion exchange resin wafer is bonded to the fresh water chamber partition, the mixed ion exchange resin wafer is bonded to the anion exchange resin wafer, one surface of the cation exchange resin wafer is bonded to the mixed ion exchange resin wafer, and the other surface of the cation exchange resin wafer is bonded to the cation exchange membrane.
The utility model discloses further improvement lies in, and the mixed ion exchange type resin wafer of fresh water compartment and anion exchange type resin wafer laminating back both ends all are provided with the water conservancy diversion intermediate layer.
The utility model is further improved in that the thickness of the anion exchange resin wafer is 3-6 mm.
The utility model is further improved in that the concentrated water compartment comprises a concentrated water compartment clapboard, a diversion interlayer, a cation exchange type resin wafer, a mixed ion exchange type resin wafer, an anion exchange type resin wafer and an anion exchange membrane; one surface of the cation exchange resin wafer is attached to the separator of the concentrated water chamber, the other surface of the cation exchange resin wafer is attached to the mixed ion exchange resin wafer, both ends of the cation exchange resin wafer are provided with diversion interlayers after the cation exchange resin wafer and the mixed ion exchange resin wafer are attached, the mixed ion exchange resin wafer is attached to the anion exchange resin wafer, and the anion exchange resin wafer is attached to the anion exchange membrane.
The utility model discloses further improvement lies in, and the water conservancy diversion intermediate layer is U type structure.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model can carry out high-efficiency desalination by arranging a plurality of repeating units between the fresh water compartment and the cathode compartment; by arranging the cation exchange resin wafer and the mixed ion exchange resin wafer, the cation exchange resin wafer and the mixed ion exchange resin wafer have the characteristics of plasticity and immobilization, and the defects that loose resin is not easy to fill and is easy to be impacted by water flow are avoided; the cation exchange resin wafer and the mixed ion exchange resin wafer have the characteristics of plasticity and immobilization, can improve the conduction efficiency of ions with the same polarity, improve the regeneration rate of the ion exchange resin, and have better desalting performance. The diversion interlayers are respectively arranged on the two sides of the water inlet and the water production of the compartment, and the anion exchange membrane, the cation mixed ion exchange type resin wafer and the exchange type resin wafer are sequentially arranged, so that the structure type can uniformly distribute the flow direction of the water, accelerate the ion migration rate and improve the electrodeionization efficiency.
Furthermore, by arranging the cation exchange resin wafers or the anion exchange resin wafers in parallel at two sides of the fresh water compartment, impurity ions in the incoming water can migrate to the same-polarity ion resin wafers after exchange adsorption of the mixed ion exchange resin wafers, and the impurity ions can rapidly migrate out of the fresh water compartment through a migration path provided by the same-polarity ion resin wafers, so that the desalting efficiency of the fresh water compartment is improved. And flow guiding interlayers are arranged at two ends of the cation exchange resin wafer or the anion exchange resin wafer of the fresh water compartment. The running mode of lower inlet and upper outlet is adopted for the incoming water, and the incoming water enters the fresh water compartment through the incoming water inlet, passes through the diversion interlayer, is uniformly distributed into the cation exchange resin wafer or the anion exchange resin wafer and is desalted.
Drawings
FIG. 1 is a perspective view of a cation exchange resin wafer, an anion exchange resin wafer, and a mixed ion exchange resin wafer according to the present invention;
FIG. 2 is a schematic cross-sectional view of a resin wafer fill based electrodeionization compartment of the invention;
figure 3 is a schematic diagram of the operation of the resin wafer fill based electrodeionization compartment of the invention.
Fig. 4 is a schematic diagram of a resin wafer fill based electrodeionization compartment of the invention.
Fig. 5 is a schematic view of the flow guiding interlayer of the present invention.
In the figure, 1-anode side shell, 2-anode side separator, 3-anode plate, 4-diversion interlayer, 5-cation exchange type resin wafer, 6-mixed ion exchange type resin wafer, 7-anion exchange membrane, 8-fresh water chamber separator, 9-anion exchange type resin wafer, 10-cation exchange membrane, 11-concentrated water chamber separator, 12-cathode plate, 13-cathode chamber separator, 14-cathode side shell, 101-incoming water inlet, 102-concentrated water inlet, 103-produced water outlet, 104-concentrated water outlet, 105-polar water outlet, 15-anode compartment, 16-fresh water compartment, 17-concentrated water compartment, 18-cathode compartment, and 19-nano conductive carbon fiber separation net.
Detailed Description
The present invention will be described in detail with reference to the following examples and accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, the preparation methods of the cation exchange resin wafer 5, the anion exchange resin wafer 9 and the mixed ion exchange resin wafer 6 in the present invention are all the existing preparation methods, and the specific preparation process is as follows: the porous resin wafer is formed by melting, bonding, cooling and soaking and dissolving ion exchange resin, polyethylene (polymer adhesive) and anhydrous glucose (water-soluble additive).
Wherein the ion exchange resin is one or two of cation exchange resin and anion exchange resin. Specifically, the ion exchange resin may be selected from a gel-type ion exchange resin, a macroporous-type ion exchange resin, or a chelate-type ion exchange resin.
Polymer binder in the ionic resin wafer preparation process: water-soluble additive: the volume ratio of the ion exchange resin is as follows: 11 to 20:11 to 17:63 to 78.
In the preparation process of the mixed ion exchange resin wafer, namely when the ion exchange resin is a mixture of cation exchange resin and anion exchange resin, the volume ratio of the cation resin to the anion resin is 6-10: 3 to 5.
Wherein the thickness of the cation exchange resin wafer 5, the anion exchange resin wafer 9 and the mixed ion exchange resin wafer 6 is controlled to be 3 to 6mm.
Referring to fig. 4, the electrodeionization compartment based on resin wafer filling of the present invention includes an anode compartment 15, a fresh water compartment 16, a concentrated water compartment 17 and a cathode compartment 18, specifically, the anode compartment 15, the fresh water compartment 16 and the cathode compartment 18 are sequentially disposed along an ion migration direction, a plurality of repeating units are disposed between the fresh water compartment 16 and the cathode compartment 18, each repeating unit includes the fresh water compartment 16 and the concentrated water compartment 17, for example, when one repeating unit is disposed, the anode compartment 15, the fresh water compartment 16, the concentrated water compartment 17, the fresh water compartment 16 and the cathode compartment 18 are sequentially disposed along the ion migration direction, and when two repeating units are disposed, the anode compartment 15, the fresh water compartment 16, the concentrated water compartment 17, the fresh water compartment 16 and the cathode compartment 18 are sequentially disposed along the ion migration direction. When a plurality of repeating units are provided, the analogy is repeated.
Referring to fig. 2, in the fresh water chamber, a cation exchange type resin wafer, an anion exchange type resin wafer, and a mixed ion exchange type resin wafer are filled; the three kinds of wafers are sequentially filled in parallel, wherein the anion exchange type resin wafer is attached to an anion exchange membrane, the cation exchange type resin wafer is attached to a cation exchange membrane, and the mixed type ion exchange resin is arranged between the anion exchange membrane and the cation exchange membrane. The three wafers are closely adhered, and the incoming water (i.e., raw water) can be treated by electrodeionization through the pores in the cation exchange resin wafer, the anion exchange resin wafer, and the mixed ion exchange resin wafer. The thickness of the fresh water chamber partition plate 13 is 10-15 mm.
The anode compartment 15 is composed of an anode separator 2, an anode plate 3, a flow guide interlayer 4, a cation exchange resin wafer 5, a mixed ion exchange resin wafer 6 and an anion exchange membrane 7, wherein an anode side shell 1 is arranged on one side of the anode separator 2, the anode plate 3 is arranged on the anode separator 2, the cation exchange resin wafer 5, the mixed ion exchange resin wafer 6 and the anion exchange membrane 7 are sequentially arranged on the anode plate 3, the cation exchange resin wafer 5 is attached to the anode plate 3, the mixed ion exchange resin wafer 6 is attached to the cation exchange resin wafer 5, and the anion exchange membrane 7 is attached to the mixed ion exchange resin wafer 6. One end of the anode separator 2 is provided with an incoming water inlet 101 and a concentrated water inlet 102, and the other end is provided with a produced water outlet 103, a concentrated water outlet 104 and a polar water outlet 105. The produced water outlet 103 discharges produced water, and the concentrated water outlet 104 discharges concentrated water.
The flow guiding interlayer 4 comprises two parts, one part is arranged at one end of the cation exchange resin wafer 5 and the mixed ion exchange resin wafer 6, the other part is arranged at the other end of the cation exchange resin wafer 5 and the mixed ion exchange resin wafer 6, and the thickness of the flow guiding interlayer 4 is the same as the total thickness of the cation exchange resin wafer 5 and the mixed ion exchange resin wafer 6.
The utility model discloses in through set up cation exchange type resin wafer 5 and make it be close to anode plate 3 in positive pole compartment 15, can make the continuation of the anion that migrates to positive pole compartment 15 migrate and receive the suppression, can effectively restrain the production of chlorine to play the effect of protection anode plate 3.
The fresh water compartment 16 is composed of a fresh water compartment partition 8, a flow guide interlayer 4, an anion exchange resin wafer 9, a mixed ion exchange resin wafer 6, a cation exchange resin wafer 5, and a cation exchange membrane 10, the anion exchange resin wafer 9 is bonded to the fresh water compartment partition 8, the mixed ion exchange resin wafer 6 is bonded to the anion exchange resin wafer 9, one surface of the cation exchange resin wafer 5 is bonded to the mixed ion exchange resin wafer 6, and the other surface is bonded to the cation exchange membrane 10. The mixed ion exchange type resin wafer 6 and the anion exchange type resin wafer 9 are jointed and both ends are provided with the diversion interlayers 4,
by arranging the single ion type resin wafers (namely the cation exchange type resin wafer 5 or the anion exchange type resin wafer 9) in parallel at two sides of the fresh water compartment 16, impurity ions in the incoming water can migrate to the isoionic resin wafer after being exchanged and adsorbed by the mixed ion exchange type resin wafer 5, and the impurity ions can rapidly migrate out of the fresh water compartment by the migration path provided by the isoionic resin wafer, so that the desalting efficiency of the fresh water compartment 16 is improved. Diversion interlayers 4 are arranged at two ends of the cation exchange resin wafer 5 or the anion exchange resin wafer 9 of the fresh water compartment 16. The incoming water adopts a running mode of downward inlet and upward outlet, and after entering the fresh water compartment 16 through the incoming water inlet 101, the incoming water passes through the diversion interlayer 4, is uniformly distributed into the cation exchange resin wafer 5 or the anion exchange resin wafer 9, and then is subjected to desalination.
The concentrated water compartment 17 is composed of a concentrated water compartment partition 11, a flow guide interlayer 4, a cation exchange resin wafer 5, a mixed ion exchange resin wafer 6, an anion exchange resin wafer 9 and an anion exchange membrane 7. The cation exchange resin wafer 5 is bonded to the concentrate chamber partition 11 on one surface and the mixed ion exchange resin wafer 6 on the other surface, the mixed ion exchange resin wafer 6 is bonded to the anion exchange resin wafer 9, and the anion exchange resin wafer 9 is bonded to the anion exchange membrane 7.
The cation exchange resin wafer 5 and the mixed ion exchange resin wafer 6 are bonded together, and the diversion interlayers 4 are arranged at both ends of the bonded cation exchange resin wafer 5 and mixed ion exchange resin wafer 6. The impurity ions transferred from the fresh water compartment 16 are converged into the mixed ion-exchange resin wafer 6 after being transferred by the isotropic ion wafer (i.e., the cation-exchange resin wafer 5), and the continued transfer is inhibited by the anisotropic ion-exchange resin wafer (i.e., the anion-exchange resin wafer 9), so that the impurity ions are accumulated in the mixed ion-exchange resin wafer 6 and discharged, and the adhesion damage of the impurity ions to the anion-exchange membrane 7 can be effectively prevented.
The cathode compartment 18 comprises a cathode chamber partition 13, and a cathode side casing 14 is arranged on one side of the cathode chamber partition 13; the cathode chamber partition 13 side is provided with a cathode plate 12, the cathode plate 12 side is provided with an anion exchange type resin wafer 9 and a mixed ion exchange type resin wafer 6 in sequence, the two ends of the anion exchange type resin wafer 9 and the mixed ion exchange type resin wafer 6 are provided with flow guide interlayers 4, and the mixed ion exchange type resin wafer 6 is attached to a cation exchange membrane 10. One end of the cathode side casing 14 is provided with an incoming water inlet 101 and a concentrated water inlet 102, and the other end is provided with a produced water outlet 103, a concentrated water outlet 104 and a polar water outlet 105.
Referring to fig. 5, the current guiding interlayer 4 is a U-shaped structure and is made of a mixed ion exchange resin wafer 6 and a nano conductive carbon fiber spacer net 19, wherein the nano conductive carbon fiber spacer net 19 is attached to the side surface of the mixed ion exchange resin wafer 6. The diversion interlayer 4 can uniformly distribute the flow direction of water, accelerate the migration rate of ions and play a role in intercepting the oxidative decomposition impurities existing in the operation.
The utility model fills the resin wafers in the fresh water compartment 16 in parallel and fills the mixed ion exchange resin wafer 6 in the middle, becauseThe contact points of the different resins are uniformly distributed, so that the dissociation of water can be carried out at a high speed, and H is dissociated at the mixed ion exchange type resin wafer 6+And OH-Separation is effected by an electric field, H+OH transferred to the cation exchange membrane 10 and the cation exchange resin wafer 5 side-The ions migrate to the side of the anion exchange membrane 7 and the anion exchange type resin wafer 9, and because the ions are the same as the ion exchange resin and the ion exchange membrane in the migration path, the migration obstruction of the foreign resin to the ions is avoided, and the migration rate of the ions is accelerated. At the same time, due to H+And OH-Respectively migrate to two sides, avoid mutual collision between the two, and can separate H from water+And OH-The method can fully act on the regeneration of the resin, improves the regeneration rate of the resin, and can obtain higher desalting performance under the condition of the same running current by adopting the compartment filling mode.
Referring to fig. 3, the operation principle of the electrodeionization compartment based on resin wafer filling of the present invention is: from the mixed ion wafer, H can be rapidly electrolyzed+、OH-And for Na in the water+、Cl-And carrying out displacement adsorption on the impurity ions. Which migrate to both sides under the action of an electric field, wherein Na+、H+When the positive ions migrate to the positive electrode side, the positive ion exchange resin wafer is arranged on the positive electrode side in the migration process, and a positive ion fast migration path is formed, so that the adsorbed impurity positive ions can be efficiently transported to the concentrated water chamber to be discharged, and similarly, the impurity negative ions can also be efficiently transported to the concentrated water chamber in a negative ion fast migration path formed by the negative ion exchange resin wafer. This way the electrodeionization efficiency of the EDI is guaranteed.
Claims (9)
1. An electrodeionization compartment based on resin wafer filling, characterized by an anode compartment (15), a fresh water compartment (16) and a cathode compartment (18) arranged in sequence along the direction of ion migration, a plurality of repeating units being arranged between the fresh water compartment (16) and the cathode compartment (18), each repeating unit comprising a fresh water compartment (16) and a concentrate compartment (17);
wherein the anode compartment (15) comprises an anode separator (2), an anode plate (3), a flow guiding interlayer (4), a cation exchange resin wafer (5), a mixed ion exchange resin wafer (6) and an anion exchange membrane (7); an anode plate (3) is arranged on the anode separator (2), a cation exchange resin wafer (5), a mixed ion exchange resin wafer (6) and an anion exchange membrane (7) are sequentially arranged on the anode plate (3), the cation exchange resin wafer (5) is attached to the anode plate (3), the mixed ion exchange resin wafer (6) is attached to the cation exchange resin wafer (5), and the anion exchange membrane (7) is attached to the mixed ion exchange resin wafer (6); flow guiding interlayers (4) are arranged at two ends of the cation exchange resin wafer (5) and the mixed ion exchange resin wafer (6).
2. The resin wafer fill based electrodeionization compartment of claim 1 wherein the anode separator (2) has a water inlet (101) and a concentrate inlet (102) at one end and a product water outlet (103), a concentrate outlet (104) and a polar water outlet (105) at the other end.
3. A resin wafer filling based electrodeionization compartment according to claim 1 wherein the thickness of the directing interlayer (4) is the same as the total thickness of the cation exchange resin wafer (5) and the hybrid ion exchange resin wafer (6).
4. The electrodeionization compartment of claim 1 wherein the thickness of the cation exchange resin wafer (5) and the mixed ion exchange resin wafer (6) is 3-6 mm.
5. The resin wafer fill based electrodeionization compartment of claim 1, wherein the fresh water compartment (16) comprises a fresh water compartment partition (8), an anion exchange resin wafer (9), a mixed ion exchange resin wafer (6), a cation exchange resin wafer (5), and a cation exchange membrane (10); an anion exchange resin wafer (9) is bonded to the fresh water chamber partition (8), a mixed ion exchange resin wafer (6) is bonded to the anion exchange resin wafer (9), one surface of a cation exchange resin wafer (5) is bonded to the mixed ion exchange resin wafer (6), and the other surface is bonded to a cation exchange membrane (10).
6. The resin wafer filling based electrodeionization compartment of claim 5, wherein the mixed ion exchange resin wafers (6) and the anion exchange resin wafers (9) of the fresh water compartment (16) are attached to form a flow directing interlayer (4) at both ends.
7. The electrodeionization compartment of claim 5 wherein the thickness of the anion exchange resin wafers (9) is 3-6 mm.
8. The resin wafer fill based electrodeionization compartment of claim 1 wherein the concentrate compartment (17) comprises a concentrate compartment partition (11), a flow directing interlayer (4), a cation exchange resin wafer (5), a mixed ion exchange resin wafer (6), an anion exchange resin wafer (9) and an anion exchange membrane (7); one surface of a cation exchange resin wafer (5) is attached to a thick water chamber partition plate (11), the other surface of the cation exchange resin wafer is attached to a mixed ion exchange resin wafer (6), after the cation exchange resin wafer (5) and the mixed ion exchange resin wafer (6) are attached, flow guide interlayers (4) are arranged at two ends of the wafer, the mixed ion exchange resin wafer (6) is attached to an anion exchange resin wafer (9), and the anion exchange resin wafer (9) is attached to an anion exchange membrane (7).
9. The electrodeionization compartment of claim 1 wherein the flow directing interlayer (4) is of U-shaped configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221941566.0U CN217708979U (en) | 2022-07-26 | 2022-07-26 | Electrodeionization compartment based on resin wafer filling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221941566.0U CN217708979U (en) | 2022-07-26 | 2022-07-26 | Electrodeionization compartment based on resin wafer filling |
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| Publication Number | Publication Date |
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| CN217708979U true CN217708979U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221941566.0U Active CN217708979U (en) | 2022-07-26 | 2022-07-26 | Electrodeionization compartment based on resin wafer filling |
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| CN (1) | CN217708979U (en) |
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2022
- 2022-07-26 CN CN202221941566.0U patent/CN217708979U/en active Active
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