CN220272187U - Transmission cable for special application - Google Patents
Transmission cable for special application Download PDFInfo
- Publication number
- CN220272187U CN220272187U CN202321143305.9U CN202321143305U CN220272187U CN 220272187 U CN220272187 U CN 220272187U CN 202321143305 U CN202321143305 U CN 202321143305U CN 220272187 U CN220272187 U CN 220272187U
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- outer side
- transmission cable
- protective layer
- shielding layer
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 93
- 239000011241 protective layer Substances 0.000 claims abstract description 30
- 238000004804 winding Methods 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 9
- 239000004917 carbon fiber Substances 0.000 claims description 9
- 239000004642 Polyimide Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 5
- 229920002678 cellulose Polymers 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical group [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 4
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 4
- 230000004888 barrier function Effects 0.000 claims 2
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 13
- 239000013535 sea water Substances 0.000 description 6
- 238000009954 braiding Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- 238000005065 mining Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009941 weaving Methods 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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Insulated Conductors (AREA)
Abstract
The utility model provides a special application transmission cable, which comprises at least two inner core parts, wherein each inner core part comprises a shielding layer, conductor parts are symmetrically arranged in each shielding layer, an insulating layer is arranged on the outer side of each shielding layer, an insulating shielding layer is arranged on the outer side of each insulating layer, a conductive waterproof layer is arranged on the outer side of each insulating shielding layer, a first protective layer is arranged on the outer side of each conductive waterproof layer, and a second protective layer is arranged on the outer side of each first protective layer; the novel plastic composite material comprises an inner core part, a filling part and a winding part, wherein the inner core part is arranged on the outer side of the inner core part; the outside of the winding part is sequentially provided with an inner lining part, an armor part, an outer cape part and a third protective layer. The cable structure of the utility model has the following characteristics through the arrangement of all layers and cooperative matching: good corrosion resistance; has high strength and pressure resistance; reliable sealing performance; sufficient electrical conductivity; high reliability and stability.
Description
Technical Field
The utility model belongs to the technical field of cables, and particularly relates to a special application transmission cable.
Background
A cable refers to a power transmission device composed of an insulating material and a metal conductor. It is typically composed of one or more wires (typically copper or aluminum wire) surrounded by an insulating protective layer. Cables are widely used in various fields, and there are various kinds of cables according to the use occasions.
Submarine cables are a type of communication line that connects between land and the sea floor to transmit information or energy. They are used to transmit information and energy such as internet data, telephone signals, television signals, energy sources, and the like, including both large submarine cables that span ocean currents internationally, and small submarine cables that connect offshore wind power plants and land grids. In general, a submarine cable is composed of a conductor, an insulating layer, a sheath, a counterweight material and the like. Due to the reasons of the laying depth, the submarine environment and the like, the submarine cable is complex in design and production process and is easy to be threatened in use, such as seawater erosion, natural disasters, artificial damages and the like, so that corresponding technical measures are required to be adopted to ensure the stable operation of the submarine cable.
The durability of a cable refers to the time that the cable can function properly under specific conditions of use, and is a very important performance indicator. Submarine cables often suffer from various threats and problems during use, mainly including: threat from subsea environments: sea water erosion, pressure changes, earthquakes, marine floats, etc. can cause damage to the submarine cable; human factors: fishery, shipping, mining activities, submarine pipeline construction, etc. may inadvertently damage submarine cables, etc. Accordingly, there is a need for a cable for use in subsea energy transmission that ensures cable durability.
Disclosure of Invention
In view of this, the present utility model provides a special application transmission cable.
The technical scheme of the utility model is as follows:
the special application transmission cable is characterized by comprising at least two inner core parts, wherein each inner core part comprises a shielding layer, conductor parts are symmetrically arranged in each shielding layer, an insulating layer is arranged on the outer side of each shielding layer, an insulating shielding layer is arranged on the outer side of each insulating layer, a conductive waterproof layer is arranged on the outer side of each insulating shielding layer, a first protective layer is arranged on the outer side of each conductive waterproof layer, and a second protective layer is arranged on the outer side of each first protective layer;
the novel plastic composite material comprises an inner core part, a filling part and a winding part, wherein the inner core part is arranged on the outer side of the inner core part;
the outside of the winding part is sequentially provided with an inner lining part, an armor part, an outer coating layer and a third protective layer.
Preferably, the filling part is a polyurethane filling part, and can play roles of shock absorption, wear elimination, softening and the like, so that the cable is protected, and the service life of the cable is prolonged.
The cable structure of the utility model has the following characteristics through the arrangement of all layers and cooperative matching: the corrosion resistance is good, and the device can stably run in seawater for a long time; the high-strength and pressure-resistant performance is realized, and various challenges brought by marine environment can be borne; reliable sealing performance ensures that the cable is not invaded by seawater and the internal structure is not damaged; sufficient conductivity to ensure the quality and rate of transmission; high reliability and stability to cope with severe sea conditions and emergency situations.
Further, the device also comprises an armor assembly, wherein the armor assembly is arranged on the outer side of the third protective layer; the armor assembly comprises a protection barrel part, and first connecting grooves are symmetrically formed in the protection barrel part;
the connecting piece is provided with a second connecting groove;
the locking device further comprises a locking piece, and the first connecting groove is connected with the second connecting groove in a matched manner through the locking piece;
the device also comprises a flexible connecting piece, wherein the flexible connecting piece connects the adjacent protection cylinders.
Further, the device further comprises a first matched locking piece and a second matched locking piece, wherein the first matched locking piece and the second matched locking piece are respectively arranged on two sides of the armor assembly.
The armor assembly can be more flexibly suitable for protecting different scenes at the sea bottom, can effectively protect a cable structure according to the corresponding deformation of an application scene, and can ensure the integrity and stability of the internal structure of the cable.
Furthermore, the flexible connecting piece is a polymer carbon fiber flexible braided connecting piece, wherein the polymer carbon fiber flexible braided material is a flexible polymer carbon fiber product which can keep the shape of the flexible connecting piece when being bent, and has better performances of tensile strength, wear resistance, water resistance, corrosion resistance and the like. The flexible braiding material is formed by adopting a plurality of single carbon fibers to carry out cross braiding or net braiding of a three-dimensional cage structure, infiltrating prepreg in a polymer matrix and then carrying out high-temperature curing treatment, so that the advantages of the strength and rigidity of the traditional carbon fibers are retained, and meanwhile, the material has better flexibility and plasticity. The requirements of protection strength and extensible deformation can be met.
Further, the shielding layer is an aluminum silicate fiber cloth shielding layer, and is formed into a net-shaped cable shielding cloth by carrying out weaving, braiding and other treatments on aluminum silicate fibers, so that the shielding layer has the characteristics of good conductivity, corrosion resistance, radiation resistance and the like.
Further, the conductor part comprises a graphene layer, and metal conductor wire bundles are symmetrically arranged in the graphene layer. Through setting up the graphene layer, have high conductivity, can effectively reduce the energy consumption in the conductive process, can further improve conductive efficiency simultaneously.
Further, the insulating layer is a crosslinked polyethylene layer; the insulating shielding layer is a cellulose nano insulating shielding layer.
The insulating layer of the utility model adopts a crosslinked polyethylene layer, and can form an excellent insulating layer through crosslinking treatment, and is mainly characterized by low dielectric loss, extremely small water absorption and strong shock resistance.
The insulating shielding layer is made of the cellulose nano insulating shielding material, and is realized by combining cellulose components with nano materials, so that the insulating shielding material has the characteristics of better mechanical strength, thermal stability, flame retardance, thermal conductivity, electrical conductivity and the like, and can improve the performances of water resistance, ageing resistance and the like of the material.
Further, the conductive water-resistant layer is a polyimide conductive water-resistant layer. The polyimide conductive water-blocking material is a special material which can simultaneously have the performances of conductivity, water resistance, flame retardance and the like, and has the following characteristics: conductivity: the polyimide is added with conductive particles such as carbon fibers, metal particles or conductive polymers, and the like, so that the conductivity can be realized; water resistance: polyimide is a high molecular material, has good water resistance in water, and cannot be affected with damp, swelled or deformed; flame retardancy: polyimide is a high temperature resistant material capable of withstanding high temperatures up to 600 degrees celsius. Meanwhile, due to the special chemical structure, flame spread can be effectively inhibited; corrosion resistance: polyimide has excellent corrosion resistance, can exist stably in most solvents and is not affected by chemical reactions.
Further, the first protective layer is an alloy lead sleeve layer, and the second protective layer is a polyurethane reinforced protective layer. In the utility model, the alloy lead sleeve layer can play a role in enhancing the mechanical strength of the cable, blocking moisture, preventing aging, preventing fire, preventing corrosion and the like, thereby ensuring the normal operation of the cable and stably transmitting power for a long time; the polyurethane reinforced protective layer is a plastic reinforced material made of polyurethane resin. The polyurethane material has the characteristics of wear resistance, scratch resistance, water resistance and the like, and can still keep stable under high-temperature and low-temperature environments.
Further, the winding part is a steel belt winding part, the inner lining part is a polypropylene inner lining part, the armor part is a steel wire armor part, and the outer cladding layer is a carbon fiber reinforced plastic layer; the third protective layer is a silicon rubber layer.
In the utility model, the steel belt winding part plays an excellent mechanical protection role outside the cable, and can prevent the cable from being damaged by larger pressure and tension in the process of transportation, installation or use; the polypropylene lining part has good mechanical property, environmental adaptability and aging resistance; the steel wire armor part has mechanical protection and wear resistance, so that the service life of the cable can be effectively prolonged; the carbon fiber reinforced plastic layer adopts carbon fiber as a reinforcement, so that the strength and rigidity of the polymer can be increased, and the carbon fiber reinforced plastic layer is lighter than metal, and has excellent corrosion resistance and conductivity; the silicon rubber layer has the characteristics of high temperature resistance, acid and alkali corrosion resistance, corrosion resistance and wear resistance.
The cable structure of the utility model has the following characteristics through the arrangement of all layers and cooperative matching: the corrosion resistance is good, and the device can stably run in seawater for a long time; the high-strength and pressure-resistant performance is realized, and various challenges brought by marine environment can be borne; reliable sealing performance ensures that the cable is not invaded by seawater and the internal structure is not damaged; sufficient conductivity to ensure the quality and rate of transmission; high reliability and stability to cope with severe sea conditions and emergency situations.
Meanwhile, the cable structure is further matched with the armor assembly, so that the cable structure can be more flexibly adapted to the protection of different submarine scenes, the cable structure can be effectively protected according to the corresponding deformation of the application scene, and the integrity and the stability of the cable internal structure can be ensured.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a partial structure of an embodiment of the present utility model;
fig. 3 is a schematic partial structure of an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
The special application transmission cable is characterized by comprising at least two inner core parts 1, wherein each inner core part comprises a shielding layer 11, conductor parts 12 are symmetrically arranged in each shielding layer, an insulating layer 13 is arranged on the outer side of each shielding layer, an insulating shielding layer 14 is arranged on the outer side of each insulating layer, a conductive waterproof layer 15 is arranged on the outer side of each insulating shielding layer, a first protection layer 16 is arranged on the outer side of each conductive waterproof layer, and a second protection layer 17 is arranged on the outer side of each first protection layer;
the novel plastic composite material comprises an inner core part and is characterized by further comprising a winding part 2, wherein the winding part is arranged on the outer side of the inner core part, and a filling part 3 is arranged between the winding part and the inner core part;
the outside of the winding part is sequentially provided with an inner lining part 4, an armor part 5, an outer cladding layer 6 and a third protective layer 7.
Preferably, the filling part is a polyurethane filling part, and can play roles of shock absorption, wear elimination, softening and the like, so that the cable is protected, and the service life of the cable is prolonged.
Further, the shielding layer is an aluminum silicate fiber cloth shielding layer.
Further, the conductor portion includes a graphene layer 121, and metal conductor bundles 122 are symmetrically disposed in the graphene layer.
Further, the insulating layer is a crosslinked polyethylene layer; the insulating shielding layer is a cellulose nano insulating shielding layer.
Further, the conductive water-resistant layer is a polyimide conductive water-resistant layer.
Further, the first protective layer is an alloy lead sleeve layer, and the second protective layer is a polyurethane reinforced protective layer.
Further, the winding part is a steel belt winding part, the inner lining part is a polypropylene inner lining part, the armor part is a steel wire armor part, and the outer cladding layer is a carbon fiber reinforced plastic layer; the third protective layer is a silicon rubber layer.
Example 2
The special application transmission cable with the same structure as the embodiment 1 is provided with an armor assembly 8, wherein the armor assembly is arranged on the outer side of the third protective layer; the armor assembly comprises a protection barrel 81, wherein the protection barrel is symmetrically provided with a first connecting groove 82;
comprising a connecting piece 83 provided with a second connecting groove (not marked);
further comprising a locking member 84, the first and second connecting slots being cooperatively connected by the locking member;
and also includes a flexible connection 85 that connects adjacent protective cylinders.
Further, the armor assembly further comprises a first matching locking member 86 and a second matching locking member 87, wherein the first matching locking member and the second matching locking member are respectively arranged on two sides of the armor assembly.
Further, the flexible connecting piece is a polymer carbon fiber flexible braiding connecting piece.
The armor assembly can be more flexibly suitable for protecting different scenes at the sea bottom, can effectively protect a cable structure according to the corresponding deformation of an application scene, and can ensure the integrity and stability of the internal structure of the cable.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art. It should be noted that technical features not described in detail in the present utility model may be implemented by any prior art.
Claims (10)
1. The special application transmission cable is characterized by comprising at least two inner core parts, wherein each inner core part comprises a shielding layer, conductor parts are symmetrically arranged in each shielding layer, an insulating layer is arranged on the outer side of each shielding layer, an insulating shielding layer is arranged on the outer side of each insulating layer, a conductive waterproof layer is arranged on the outer side of each insulating shielding layer, a first protective layer is arranged on the outer side of each conductive waterproof layer, and a second protective layer is arranged on the outer side of each first protective layer;
the novel plastic composite material comprises an inner core part, a filling part and a winding part, wherein the inner core part is arranged on the outer side of the inner core part;
the outside of the winding part is sequentially provided with an inner lining part, an armor part, an outer coating layer and a third protective layer.
2. The special purpose transmission cable of claim 1, further comprising an armor assembly disposed outside of the third protective layer; the armor assembly comprises a protection barrel part, and first connecting grooves are symmetrically formed in the protection barrel part;
the connecting piece is provided with a second connecting groove;
the locking device further comprises a locking piece, and the first connecting groove is connected with the second connecting groove in a matched manner through the locking piece;
the device also comprises a flexible connecting piece, wherein the flexible connecting piece connects the adjacent protection cylinders.
3. The special purpose transmission cable of claim 2, further comprising a first mating lock and a second mating lock, the first mating lock and the second mating lock being disposed on opposite sides of the armor assembly, respectively.
4. A special purpose transmission cable as set forth in claim 3 wherein the flexible connector is a polymeric carbon fiber flexible braided connector.
5. The special purpose transmission cable of claim 1, wherein the shielding layer is an aluminum silicate fiber cloth shielding layer.
6. The special purpose transmission cable as set forth in claim 1, wherein the conductor portion includes a graphene layer in which metal conductor bundles are symmetrically disposed.
7. The special purpose transmission cable of claim 1, wherein the insulating layer is a crosslinked polyethylene layer; the insulating shielding layer is a cellulose nano insulating shielding layer.
8. The application specific transmission cable of claim 1, wherein the conductive water barrier is a polyimide conductive water barrier.
9. The special purpose transmission cable of claim 1, wherein the first protective layer is an alloy lead jacket layer and the second protective layer is a polyurethane reinforced protective layer.
10. The special purpose transmission cable of claim 1, wherein the wrapping portion is a steel tape wrapping portion, the inner lining portion is a polypropylene inner lining portion, the armor portion is a steel wire armor portion, and the outer jacket layer is a carbon fiber reinforced plastic layer; the third protective layer is a silicon rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321143305.9U CN220272187U (en) | 2023-05-12 | 2023-05-12 | Transmission cable for special application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321143305.9U CN220272187U (en) | 2023-05-12 | 2023-05-12 | Transmission cable for special application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220272187U true CN220272187U (en) | 2023-12-29 |
Family
ID=89310797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321143305.9U Active CN220272187U (en) | 2023-05-12 | 2023-05-12 | Transmission cable for special application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220272187U (en) |
-
2023
- 2023-05-12 CN CN202321143305.9U patent/CN220272187U/en active Active
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