CN220895242U - Strong-dragging-prevention large-section coal mine cable - Google Patents
Strong-dragging-prevention large-section coal mine cable Download PDFInfo
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- CN220895242U CN220895242U CN202322382562.4U CN202322382562U CN220895242U CN 220895242 U CN220895242 U CN 220895242U CN 202322382562 U CN202322382562 U CN 202322382562U CN 220895242 U CN220895242 U CN 220895242U
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- coal mine
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- 239000003245 coal Substances 0.000 title claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 42
- 239000004020 conductor Substances 0.000 claims abstract description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 238000009954 braiding Methods 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000004760 aramid Substances 0.000 claims description 9
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 8
- 229920006231 aramid fiber Polymers 0.000 claims description 8
- 239000008397 galvanized steel Substances 0.000 claims description 8
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 8
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 6
- 229920001875 Ebonite Polymers 0.000 claims description 4
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 4
- 238000005187 foaming Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 8
- 229920003235 aromatic polyamide Polymers 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model relates to a strong-dragging-prevention large-section coal mine cable which comprises a plurality of power wire cores, wherein the power wire cores are arranged around a central pad core, an inner pad layer is arranged outside the power wire cores and the central pad core in an extrusion mode, an inner liner layer is arranged outside the inner pad layer in an extrusion mode, a first anti-slip wrapping belt is arranged outside the inner liner layer in an extrusion mode, a woven armor reinforcing layer is arranged outside the first anti-slip wrapping belt, a plurality of reinforcing cores are uniformly distributed inside the woven armor reinforcing layer, a second anti-slip wrapping belt is arranged outside the woven armor reinforcing layer, an inner sheath is arranged outside the second anti-slip wrapping belt, and an outer sheath is arranged outside the inner sheath. According to the utility model, the cable conductors are dispersed, and the stress reinforcing structure is arranged, so that the overall bearing capacity of the cable is improved, and the cable is prevented from being damaged in strong dragging.
Description
Technical Field
The utility model relates to a cable, in particular to a coal mine cable.
Background
In the use process of the coal mine power cable, stretching, dragging, bending, twisting, moving and the like are required to be born, when the cable is stressed, the internal structure of the cable can be damaged, and the damaged position generally occurs in a place with weak bearing force. In a common coal mine power cable, a plurality of insulated wire cores are cabled together, the stressed position points of the metal conductors are few, and when the section of the cable is large, the stress capacity of the whole structure of the cable is more dispersed and uneven. The insulated wire cores are in contact with each other and are easy to be rubbed and damaged during bending.
Disclosure of utility model
The utility model aims to: the utility model aims to overcome the defects in the prior art, and provides the cable with the large cross section and the strong dragging prevention, which is used for dispersing cable conductors, arranging stress reinforcing structures, increasing the overall bearing capacity of the cable and preventing the cable from being damaged during strong dragging.
The technical scheme is as follows: in order to solve the technical problems, the anti-strong-dragging large-section coal mine cable comprises a plurality of power wire cores, wherein the power wire cores are arranged around a central pad core, an inner pad layer is arranged outside the power wire cores and the central pad core in an extrusion mode, an inner liner layer is arranged outside the inner pad layer in an extrusion mode, the inner liner layer is circular in shape, a first anti-skidding wrapping tape is arranged outside the inner liner layer in an extrusion mode, a braided armor reinforcing layer is arranged outside the first anti-skidding wrapping tape, a plurality of reinforcing cores are uniformly distributed inside the braided armor reinforcing layer, a second anti-skidding wrapping tape is arranged outside the braided armor reinforcing layer, an inner sheath is arranged outside the second anti-skidding wrapping tape, an outer sheath is arranged outside the inner sheath, a plurality of insulating wire cores are twisted to form the power wire cores, filling is arranged at inner gaps and outer gaps of the plurality of insulating wire cores, a braided reinforcing layer is arranged outside the insulating wire cores, a conductor shielding layer is arranged outside the conductor core in the conductor, an insulating layer is arranged outside the conductor shielding layer in an extrusion mode, an insulating layer is arranged outside the conductor shielding layer, a second anti-skidding shielding layer is arranged outside the insulating layer, a conductor shielding layer is arranged outside the insulating layer, a plurality of shielding layer, a plurality of conductor shielding layer is uniformly distributed, a plurality of reinforcing layers are twisted, and a plurality of strands are twisted, and the aramid strands are twisted around the outer edges of strands, and the aramid strands are twisted around the central strands.
Further, the monofilament wire diameter in the tinned copper wire bundles is 0.2-0.5mm, the pitch diameter ratio during bundle twisting is 18-22, the pitch diameter ratio during strand twisting is 16-20, a central aramid fiber bundle is arranged in the center during strand twisting, the central aramid fiber bundle is tightly twisted with a plurality of tinned copper wires, and the direction of the strand bundle twisting is opposite to the direction of the strand twisting.
Further, the conductor shielding layer, the insulating layer and the insulating shielding layer are formed by three layers of coextrusion, the layers are closely attached together, no gap exists, the concentricity of the three layers is larger than 98%, the conductor shielding layer and the insulating shielding layer are made of semiconductive rubber, the thickness of each layer is not smaller than 0.6mm, the insulating layer is made of ethylene propylene rubber, and the thickness of the insulating layer is not smaller than 3.4mm.
Further, the braided metal shielding layer is formed by braiding tinned copper wires, the diameter of the tinned copper wires is 0.15-0.20mm, and the braiding density is not less than 80%; the braiding reinforcing layer is formed by alternately braiding tinned copper wires and nylon fibers, the braiding density is more than 80%, and the diameter of the tinned copper wires is not less than 0.2mm; the braided armor reinforcing layer is formed by alternately braiding galvanized steel wires and aramid fibers, wherein the galvanized steel wires account for two thirds of the number of ingots, the diameter of the galvanized steel wires is not more than 0.5mm, and the braiding density is more than 70%.
Further, the filling is a rubber filling strip; the central pad core is made of hard rubber, and is attached to the power wire core.
Further, the inner cushion layer is made of chlorinated polyethylene, the shape of the inner cushion layer is triangular, the vertex angle is arc-shaped, and the thickness of the thinnest part of the inner cushion layer is not less than 0.8mm.
Further, the inner liner is made of hard chlorinated polyethylene, the strength is greater than 7.0Mpa, and the thickness of the thinnest part of the inner liner is not less than 1.2mm.
Further, the first anti-slip tape and the second anti-slip tape are both made of foaming polytetrafluoroethylene tapes, the thickness of the first anti-slip tape and the second anti-slip tape is 0.2-0.4mm, the overlapping is wrapped, and the overlapping rate is not less than 30%.
Further, the reinforcing cores are steel strands, the number of the reinforcing cores is 6-12, the reinforcing cores are uniformly and symmetrically distributed, the section of each steel strand is 4-10mm 2, and the diameter of each steel wire is not more than 0.8mm.
Further, the inner sheath adopts soft chloroprene rubber, the thickness is not less than 1.2mm, the outer sheath adopts high-strength tearing-resistant chloroprene rubber, the tensile strength is more than 10Mpa, the tearing strength is more than 6N/mm, and the thickness is not less than 4.0mm.
The beneficial effects are that: compared with the prior art, the utility model has the remarkable advantages that:
The cable is a medium-voltage cable, the three-phase power wire core is characterized in that the cross section area of the conductor is larger than 150mm 2, each phase of conductor is divided into three equal parts, the conductor shielding, insulation shielding and braiding metal shielding are respectively extruded, the conductor is stranded into a unit to form a unit phase, the conductors are dispersed in the cable structure, the stress capacity of the cable conductor is also dispersed, the weak points of stress in the cable structure are reduced, the overall stress capacity of the cable is increased, and the cable is protected from being damaged when being strongly towed;
The hard ethylene propylene rubber is adopted for insulation, so that the softness and certain strength of the rubber are maintained, and a part of force can be born;
the reinforcement layer which is formed by the metal and the fiber crossing is woven outside the unit phase, so that the stress capability is increased, and the functions of shielding and guiding fault current are added;
The three unit phases are cabled around the central cushion core, the shape of the central cushion core is respectively attached to the three unit phases, the three unit phases are uniformly and symmetrically distributed, the electric field is uniform, the conductor bearing force is dispersed, and the central cushion core adopts hard rubber and can stably support the positions of the three unit phases;
the three unit phases are directly extruded outside the cable to form an inner cushion layer, the cable core is wrapped, the positions of the three unit phases are more stable, when the cable is stressed, the three unit phases are mutually independent and have no mutual contact friction, the shape of the extruded inner cushion layer is triangular, and the vertex angle is an arc;
The inner liner layer is extruded outside the inner liner layer, the shape of the inner liner layer is a circular structure, the inner liner layer and the inner structure are embedded in the shape of the inner liner layer, and when the cable is bent and twisted, the inner liner layer, the inner structure and the inner liner layer cannot slide, so that the position of the structure is stabilized, and the stressed damage is reduced;
The first anti-skid belting is wrapped outside the lining layer, the armor reinforcing layer is woven, steel strands are uniformly distributed in the armor reinforcing layer, the stress capacity is increased, and the number of the steel strands is 6-12;
the cable sheath comprises two layers, and the inner sheath adopts soft chloroprene rubber, and the oversheath adopts high strength to tear chloroprene rubber, and two layers of sheaths adopt double-deck crowded rubber machine of co-extrusion to extrude simultaneously, and the inner sheath is impressed into the woven armor enhancement layer clearance through pressure, reduces the slip when woven armor enhancement atress.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
fig. 2 is a schematic cross-sectional structure of a conductor in the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2, according to the coal mine cable with the strong dragging prevention and large cross section, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4, a woven metal shielding layer 5, three insulated wire cores are twisted into a unit phase, a gap is filled with a filling 7, a woven reinforcing layer 6 is arranged outside the unit phase, a cable is formed around a central pad core 8, an inner pad layer 9 is extruded, an inner liner layer 10 is extruded, a first anti-slip wrapping tape 11 is wrapped, a woven armor reinforcing layer 13, a reinforcing core 12 is placed inside the woven armor reinforcing layer 13, a second anti-slip wrapping tape 14 is wrapped outside the woven armor reinforcing layer 13, an inner sheath 15 is extruded, and an outer sheath 16 is extruded.
The conductor 1 is composed of multiple stranded wires, wherein a tinned copper wire bundle 1.2 surrounds a central aramid wire bundle 1.1 to form stranded wires, the stranded wires are stranded, a reinforced aramid wire bundle 1.3 is filled in gaps at the outer edge, the monofilament wire diameter in the tinned copper wire bundle 1.2 is 0.2-0.5mm, the pitch diameter ratio during stranding is 18-22, the pitch diameter ratio during stranded wire stranding is 16-20, the stranded wires are stranded by adopting a structure with a normal center, the stranding is tight, the stranding directions of adjacent layers are opposite, the stranding direction of the stranded wires is opposite to the stranding direction of the stranded wires, the torsion moment of each layer of stranded wires is eliminated through the design of the stranding direction and the pitch diameter ratio, the internal damage of the conductor is reduced when the cable is stressed, the central aramid wire bundle 1.1, the reinforced aramid wire bundle 1.3 is distributed in the conductor 1, the whole anti-dragging capacity of the cable is increased, the sectional area of the conductor 1 is one third of a phase conductor, and the sectional area of the phase conductor is larger than 150mm 2.
The conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are extruded simultaneously by adopting three layers of coextrusion, the layers are closely attached together without gaps, and the concentricity of the three layers is more than 98%.
The conductor shielding layer 2 and the insulating shielding layer 4 are made of semi-conductive rubber, the thickness of the semi-conductive rubber is not less than 0.6mm, the conductor shielding layer 2 and the conductor 1 form equipotential without electric field, and the insulating shielding layer 4 and the woven metal shielding layer 5 form equipotential without electric field, so that partial discharge is avoided.
The insulating layer 3 is made of hard ethylene propylene rubber, keeps the softness of rubber and has certain strength, can bear a part of force, and has an insulating thickness not smaller than 3.4mm.
The braided metal shielding layer 5 is braided by tin-plated copper wires, the diameter of the tin-plated copper wires is 0.15-0.20mm, and the braiding density is not less than 80%.
The wire cores after the three woven metal shielding layers 5 are stranded into a unit to form a unit phase, the structure disperses one-phase conductors, the stress capacity of the cable conductors is dispersed, the weight of the cable structure is dispersed, the weak points of stress in the cable structure are reduced, the overall stress capacity of the cable is increased, and the cable is protected from being damaged when being strongly towed.
The filling 7 is rubber filling strips and fills the cell phase gaps.
The knitting reinforcement layer 6 adopts tinned copper wires and nylon fibers to be alternately knitted, so that the stress capability is increased, the functions of shielding and draining fault current are added, the knitting density is more than 80%, and the diameter of the tinned copper wires is not less than 0.2mm.
The central cushion core 8 adopts hard rubber to stably support the positions of three unit phases, the three unit phases are cabled around the central cushion core 8, the shape of the central cushion core 8 is respectively attached to the three unit phases, the three unit phases are uniformly and symmetrically distributed, the electric field is uniform, and the conductor bearing force is dispersed.
The chlorinated polyethylene is adopted in the inner cushion layer 9 to wrap the cable core, the positions of three unit phases are more stable, when the cable is stressed, the three unit phases are mutually independent and do not contact with each other for friction, the outer shape of the inner cushion layer 9 is triangular, the vertex angle is an arc, the cable core gap is filled in the inner cushion layer 9, and the thickness of the thinnest part of the inner cushion layer 9 is not less than 0.8mm.
The inner liner layer 10 is made of hard chlorinated polyethylene, the strength is greater than 7.0Mpa, the inner liner layer 9 and the inner structure are embedded in the shape of the inner liner layer 10, when the cable is bent and twisted, the inner liner layer 9 and the inner structure cannot slide with the inner liner layer 10, the position of the structure is stabilized, the damage caused by stress is reduced, and the thickness of the thinnest part of the inner liner layer 10 is not less than 1.2mm.
The first anti-slip tape 11 and the second anti-slip tape 14 are made of foaming polytetrafluoroethylene tapes, the thickness is 0.2-0.4mm, the overlapping is wrapped, and the overlapping rate is not less than 30%.
The reinforcing cores 12 are steel strands, the stress capacity is improved, the number of the reinforcing cores 12 is 6-12, the reinforcing cores are uniformly and symmetrically distributed and covered by the braided armor reinforcing layer 13, the section of each steel strand is 4-10mm 2, and the diameter of each steel wire is not more than 0.8mm.
The braided armor reinforcing layer 13 is formed by alternately braiding galvanized steel wires and aramid fibers, wherein the galvanized steel wires account for two thirds of the number of ingots, the diameter of the steel wires is not more than 0.5mm, the braiding density is more than 70%, the capability of the cable to be towed is improved by the braided armor reinforcing layer 13, the braided armor reinforcing layer 13 compresses the first anti-slip tape 11, and the first anti-slip tape 11 can partially enter a gap of the braided armor reinforcing layer 13.
The inner sheath 15 is made of soft neoprene with a thickness not less than 1.2mm.
The oversheath 16 adopts high strength to tear chloroprene rubber, and tensile strength is greater than 10Mpa, and tear strength is greater than 6N/mm, and oversheath 16 thickness is not less than 4.0mm, and inner sheath 15 adopts double-deck crowded rubber machine that coextrudes simultaneously with oversheath 16 to extrude, and inner sheath 15 is impressed into weaving armor enhancement layer 13 clearance through pressure, reduces the slip when weaving armor enhancement layer 13 atress, and double-deck sheath structure protection cable inner structure does not receive outside radial force damage.
The present utility model provides a method and a thought, and a method for implementing the technical scheme are numerous, the above description is only a preferred embodiment of the present utility model, and it should be noted that, for those skilled in the art, several improvements and modifications can be made, and these improvements and modifications should also be regarded as protection scope of the present utility model, and each component that is not explicitly described in the present embodiment can be implemented by the prior art.
Claims (10)
1. The utility model provides a prevent strong big cross-section colliery cable that drags which characterized in that: the power wire core is provided with an inner cushion layer (9) around a central cushion core (8), an inner liner layer (10) is arranged outside the inner cushion layer (9) in a squeezing mode, the inner liner layer (10) is circular in shape, a first anti-slip wrapping tape (11) is arranged outside the inner liner layer (10) in a wrapping mode, a braided armor reinforcing layer (13) is arranged outside the first anti-slip wrapping tape (11), a plurality of reinforcing cores (12) are uniformly distributed inside the braided armor reinforcing layer (13), a second anti-slip wrapping tape (14) is arranged outside the braided armor reinforcing layer (13), an inner jacket (15) is arranged outside the second anti-slip wrapping tape (14), an outer jacket (16) is arranged outside the inner jacket (15), the power wire core comprises a plurality of insulating wire cores which are twisted, a filling (7) is arranged at an inner gap and an outer gap of the insulating wire core and the filling (7), a braided reinforcing layer (6) is arranged outside the insulating wire core, the insulating wire core comprises a conductor (1), a second anti-slip wrapping tape (14) is arranged outside the braided armor reinforcing layer (1), a conductor (3) is arranged outside the insulating wire core (3), the novel high-voltage cable is characterized in that a braided metal shielding layer (5) is arranged outside the insulating shielding layer (4), the conductor (1) is formed by twisting strands, gaps at the outer edges of the strands are filled with reinforced aramid fiber tows (1.3), and the strands are formed by twisting tinned copper tows (1.2) around the central aramid fiber tows (1.1).
2. The strong drag prevention large section coal mine cable of claim 1, wherein: the monofilament diameter in the tinned copper wire bundles (1.2) is 0.2-0.5mm, the pitch diameter ratio during bundle twisting is 18-22, the pitch diameter ratio during strand twisting is 16-20, a central aramid fiber bundle (1.1) is arranged in the center of the strands during strand twisting and is tightly twisted with the tinned copper wire bundles (1.2), and the direction of the strands during strand twisting is opposite to the direction of the strands during strand twisting.
3. The strong drag prevention large section coal mine cable of claim 1, wherein: the conductor shielding layer (2), the insulating layer (3) and the insulating shielding layer (4) are formed by three layers of coextrusion, the layers are closely attached together, no gap exists, the concentricity of the three layers is larger than 98%, the conductor shielding layer (2) and the insulating shielding layer (4) are made of semiconductive rubber, the thickness of each layer is not smaller than 0.6mm, the insulating layer (3) is made of ethylene propylene rubber, and the thickness of the insulating layer is not smaller than 3.4mm.
4. The strong drag prevention large section coal mine cable of claim 1, wherein: the braided metal shielding layer (5) is formed by braiding tinned copper wires, the diameter of the tinned copper wires is 0.15-0.20mm, and the braiding density is not less than 80%; the braiding reinforcement layer (6) is formed by interweaving tinned copper wires and nylon fibers, wherein the braiding density is more than 80%, and the diameter of the tinned copper wires is not less than 0.2mm; the braided armor reinforcing layer (13) is formed by alternately braiding galvanized steel wires and aramid fibers, wherein the galvanized steel wires occupy two thirds of the number of ingots, the diameter of the galvanized steel wires is not more than 0.5mm, and the braiding density is more than 70%.
5. The strong drag prevention large section coal mine cable of claim 1, wherein: the filling (7) is a rubber filling strip; the central cushion core (8) is made of hard rubber, and the central cushion core (8) is attached to the power wire core.
6. The strong drag prevention large section coal mine cable of claim 1, wherein: the inner cushion layer (9) is made of chlorinated polyethylene, the shape of the inner cushion layer (9) is triangular, the apex angle is arc-shaped, and the thickness of the thinnest part of the inner cushion layer (9) is not less than 0.8mm.
7. The strong drag prevention large section coal mine cable of claim 1, wherein: the lining layer (10) is made of hard chlorinated polyethylene, the strength is greater than 7.0Mpa, and the thickness of the thinnest part of the lining layer (10) is not less than 1.2mm.
8. The strong drag prevention large section coal mine cable of claim 1, wherein: the first anti-slip bag belt (11) and the second anti-slip bag belt (14) are made of foaming polytetrafluoroethylene belts, the thickness of the anti-slip bag belts is 0.2-0.4mm, the anti-slip bags are overlapped and wrapped, and the overlapping rate is not less than 30%.
9. The strong drag prevention large section coal mine cable of claim 1, wherein: the reinforcing cores (12) are steel strands, the number of the reinforcing cores (12) is 6-12, the reinforcing cores are uniformly and symmetrically distributed, the section of each steel strand is 4-10mm 2, and the diameter of each steel wire is not more than 0.8mm.
10. The strong drag prevention large section coal mine cable of claim 1, wherein: the inner sheath (15) adopts soft chloroprene rubber, the thickness is not less than 1.2mm, the outer sheath (16) adopts high-strength tearing-resistant chloroprene rubber, the tensile strength is more than 10Mpa, the tearing strength is more than 6N/mm, and the thickness is not less than 4.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322382562.4U CN220895242U (en) | 2023-09-04 | 2023-09-04 | Strong-dragging-prevention large-section coal mine cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322382562.4U CN220895242U (en) | 2023-09-04 | 2023-09-04 | Strong-dragging-prevention large-section coal mine cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220895242U true CN220895242U (en) | 2024-05-03 |
Family
ID=90838983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322382562.4U Active CN220895242U (en) | 2023-09-04 | 2023-09-04 | Strong-dragging-prevention large-section coal mine cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220895242U (en) |
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2023
- 2023-09-04 CN CN202322382562.4U patent/CN220895242U/en active Active
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