CN212209012U - Rare earth high-iron aluminum alloy fireproof cable - Google Patents
Rare earth high-iron aluminum alloy fireproof cable Download PDFInfo
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- CN212209012U CN212209012U CN202021493380.4U CN202021493380U CN212209012U CN 212209012 U CN212209012 U CN 212209012U CN 202021493380 U CN202021493380 U CN 202021493380U CN 212209012 U CN212209012 U CN 212209012U
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 87
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 77
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 65
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 63
- 239000010410 layer Substances 0.000 claims abstract description 84
- 239000004020 conductor Substances 0.000 claims abstract description 44
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003063 flame retardant Substances 0.000 claims abstract description 26
- 239000011241 protective layer Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 13
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 12
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 6
- 239000004945 silicone rubber Substances 0.000 claims description 5
- 230000009970 fire resistant effect Effects 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 229910052782 aluminium Inorganic materials 0.000 description 18
- 238000003723 Smelting Methods 0.000 description 8
- 238000000137 annealing Methods 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 238000011049 filling Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 4
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical group [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 4
- 229910052746 lanthanum Inorganic materials 0.000 description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000012856 weighed raw material Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a tombarthite high-iron aluminum alloy fireproof cable belongs to power cable technical field. The fireproof cable comprises a rare earth high-iron aluminum alloy conductor and a protective layer, wherein at least two rare earth high-iron aluminum alloy conductors are arranged in the protective layer. The outside of tombarthite high-speed railway aluminium alloy conductor is provided with flame retardant coating and first insulating layer, and the flame retardant coating is located tombarthite high-speed railway aluminium alloy conductor and between the first insulating layer, is provided with the second insulating layer between first insulating layer and the inoxidizing coating. The protective layer is provided with a concentric flame-retardant layer and a sheath in sequence from inside to outside, the sheath is located outside the flame-retardant layer, and a second insulating layer is arranged between the flame-retardant layer and the first insulating layer. The utility model adopts the above-mentioned tombarthite high-iron aluminum alloy fireproof cable has fire-resistant, the good characteristics of fire behavior, has improved the life of cable to have the good advantage of electric conductive property.
Description
Technical Field
The utility model belongs to the technical field of power cable, especially, relate to a tombarthite high-iron aluminum alloy fireproof cable.
Background
Along with the more and more strict requirements of domestic buildings on fire protection, especially when selecting power cables, the fire department has higher requirements on the fire-protection grade of the cables, and the low-voltage insulation fire-resistant cables in the prior art mainly comprise the following: firstly, a low-voltage insulating fire-resistant cable wrapped with mica tapes is wrapped; and the other is a mineral insulation fire-resistant cable.
The mica tape and the glass fiber tape form a fire-resistant insulating composite layer. The probability of mica tape fracture and bag leakage is higher in the manufacturing process of the cable, so that the fire-resistant quality requirement is difficult to control, and the situation that a mica layer falls off is easily generated in the wrapping process, so that the fireproof performance of the cable is reduced, and the normal use of the cable is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tombarthite high-iron aluminum alloy fireproof cable solves among the prior art cable mica tape and easily appears fracture, leak the package, drops the problem that leads to cable fire resistance to descend.
In order to achieve the purpose, the utility model provides a rare earth high-iron aluminum alloy fireproof cable, which comprises a rare earth high-iron aluminum alloy conductor and a protective layer, wherein at least two rare earth high-iron aluminum alloy conductors are arranged inside the protective layer;
a fireproof layer and a first insulating layer are arranged outside the rare earth high-iron aluminum alloy conductor, the fireproof layer is positioned between the rare earth high-iron aluminum alloy conductor and the first insulating layer, and a second insulating layer is arranged between the first insulating layer and the protective layer;
the protective layer is provided with a concentric flame-retardant layer and a sheath in sequence from inside to outside, the sheath is located outside the flame-retardant layer, and a second insulating layer is arranged between the flame-retardant layer and the first insulating layer.
Preferably, the rare earth high-iron aluminum alloy conductor is formed by stranding a plurality of rare earth high-iron aluminum alloy monofilaments, and the rare earth high-iron aluminum alloy monofilaments are of an oval structure.
Preferably, the first insulating layer is a crosslinked polyethylene insulating layer, the second insulating layer is a ceramic fireproof silicone rubber layer, and the fireproof layer is an inorganic mineral insulating fireproof layer.
Preferably, the inside of inoxidizing coating is provided with 4 tombarthite high-speed railway aluminum alloy conductors, and 4 tombarthite high-speed railway aluminum alloy conductors are the circumference array around the axis of cable and distribute, are provided with the halogen-free filler strip between the tombarthite high-speed railway aluminum alloy conductor, and the halogen-free filler strip sets up with the cable is coaxial.
The rare earth high-iron aluminum alloy monofilament comprises the following components in percentage by mass: 1.0 to 1.5 percent of iron, 0.03 to 0.08 percent of silicon, 0.02 to 0.08 percent of copper, 0.02 to 0.08 percent of manganese, 0.01 to 0.05 percent of magnesium, 0.01 to 0.08 percent of titanium, 0.01 to 0.08 percent of zirconium, 0.05 to 0.1 percent of chromium, 0.01 to 0.05 percent of strontium, 0.8 to 1.5 percent of rare earth, less than or equal to 0.1 percent of the sum of impurity contents and the balance of aluminum.
The rare earth element is cerium, lanthanum or a mixture of cerium and lanthanum.
The preparation method of the rare earth high-iron aluminum alloy fireproof cable comprises the following steps:
s1, preparing materials, and weighing the raw materials according to set chemical components for later use;
s2, melting aluminum ingots, namely putting the aluminum ingots with the purity higher than 99.8% into a melting furnace for melting, wherein the melting temperature is 750-;
s3, smelting, namely adding the weighed raw materials into the heat-preserved aluminum liquid according to the component design into a smelting furnace for smelting, refining and degassing, and preserving heat after uniform smelting;
s4, casting and forming, namely casting the smelted aluminum liquid to form an aluminum strip;
s5, rolling, namely rolling the cast aluminum strip by a rolling mill to form a rare earth high-iron aluminum alloy rod with phi 9 mm;
s6, drawing, namely drawing the rare earth high-iron aluminum alloy rod into an oval or runway rare earth high-iron aluminum alloy monofilament by using a thirteen-die drawing machine; twisting the rare earth high-iron aluminum alloy monofilament on a frame twist by adopting a special-shaped twisting die to form a rare earth high-iron aluminum alloy conductor;
s7, performing heat treatment, namely putting the rare earth high-iron aluminum alloy conductor into an annealing furnace for annealing, wherein the annealing temperature is 300 +/-10 ℃, and the annealing time is 6-9 h; after the rare earth high-iron aluminum alloy conductor is naturally cooled, wrapping an inorganic mineral insulating fireproof layer and a crosslinked polyethylene insulating layer on the outer portion of the rare earth high-iron aluminum alloy conductor, wrapping a flame-retardant layer on the outer portion of the crosslinked polyethylene insulating layer, filling a ceramic fire-resistant silicon rubber layer between the flame-retardant layer and the crosslinked polyethylene insulating layer, filling a halogen-free filling strip on the rare earth high-iron aluminum alloy conductor, and sleeving a sheath to form the rare earth high-iron aluminum alloy fireproof cable.
A tombarthite high-iron aluminum alloy fireproof cable's advantage and positive effect be:
1. the outside of cable is low smoke and zero halogen flame retardant sheath, and the outside parcel of conductor has inorganic mineral insulation flame retardant coating and crosslinked polyethylene insulating layer, can improve the fire resistance of cable.
2. The ceramic fire-resistant silicone rubber layer is arranged between the crosslinked polyethylene insulating layer and the flame-retardant layer, and can be subjected to ceramic formation after high-temperature combustion to form a hard ceramic protective layer, so that the rare earth high-iron aluminum alloy conductor is prevented from being damaged, and the service life and the use safety of the cable are improved.
3. The aluminum monofilaments are in an oval or track-shaped structure, and the conventional round monofilament structure is abandoned, so that more aluminum monofilaments can be arranged in unit area, the aluminum monofilaments are arranged closely, and the cross-sectional area of the cable is reduced.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is the utility model relates to a structural schematic diagram of tombarthite high-iron aluminum alloy fireproof cable embodiment.
Reference numerals
1. A sheath; 2. a flame retardant layer; 3. a ceramic fireproof silicon rubber layer; 4. a crosslinked polyethylene insulating layer; 5. inorganic mineral insulating and fireproof layers; 6. a rare earth high-iron aluminum alloy conductor; 7. and (4) halogen-free filling strips.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein the following examples are based on the technical solution and are provided for describing the detailed embodiments and specific operation procedures, but the scope of the present invention is not limited by the following examples.
Fig. 1 is the utility model relates to a structural schematic diagram of tombarthite high-iron aluminum alloy fireproof cable embodiment. The utility model provides a tombarthite high-speed railway aluminum alloy fireproof cable, includes tombarthite high-speed railway aluminum alloy conductor 6 and inoxidizing coating, and the inside of inoxidizing coating is provided with two tombarthite high-speed railway aluminum alloy conductors 6 at least. Preferably, the inside of the protective layer is provided with 4 conductors 6 of rare earth high iron aluminum alloy, and the 4 conductors 6 of rare earth high iron aluminum alloy are distributed in a circumferential array around the axis of the cable. And halogen-free filler strips 7 are arranged between the rare earth high-iron aluminum alloy conductors 6, and the halogen-free filler strips 7 are arranged coaxially with the cable. The halogen-free filling strips 7 have a good flame retardant effect, and can effectively separate the rare earth high-iron aluminum alloy conductor 6, so that the flame retardant effect is improved.
The exterior of the rare earth high-iron aluminum alloy conductor 6 is provided with a fireproof layer or a first insulating layer, and the fireproof layer is positioned between the rare earth high-iron aluminum alloy conductor 6 and the first insulating layer. The first insulating layer is a crosslinked polyethylene insulating layer 4, and the fire-proof layer is an inorganic mineral insulating fire-proof layer 5. The protective layer is provided with a concentric flame-retardant layer 2 and a sheath 1 from inside to outside in sequence, and the sheath 1 is positioned outside the flame-retardant layer 2. The sheath 1 is a low-smoke halogen-free flame-retardant sheath 1, has a good flame-retardant effect, and improves the fireproof performance of the cable. A second insulating layer is arranged between the flame-retardant layer 2 and the first insulating layer, and the second insulating layer is a ceramic fireproof silicone rubber layer 3. The ceramic fireproof silicone rubber layer 3 can be fired into a ceramic shape after high-temperature combustion to form a hard ceramic armor, and the higher the temperature and the longer the ablation time are, the harder the ceramic armor is. The setting of pottery fire-resistant silastic-layer 3 has better guard action to tombarthite high-iron aluminum alloy conductor 6, improves the fire behavior of cable to can effectually prevent that the cable from breaking, improve the life of cable.
The rare earth high-iron aluminum alloy conductor 6 is formed by stranding a plurality of rare earth high-iron aluminum alloy monofilaments, and the rare earth high-iron aluminum alloy monofilaments are of an oval structure. The structure of tombarthite high-iron aluminum alloy monofilament has abandoned traditional circular monofilament structure, adopts the heterotypic mode strand stranding of sticising to become tombarthite high-iron aluminum alloy conductor 6, adopts oval tombarthite high-iron aluminum alloy monofilament to make things convenient for the production of tombarthite high-iron aluminum alloy monofilament on the one hand, and on the other hand can improve the compact type between the tombarthite high-iron aluminum alloy monofilament for can inseparable range between the tombarthite high-iron aluminum alloy monofilament, increase the quantity of tombarthite high-iron aluminum alloy monofilament in the unit area.
The rare earth high-iron aluminum alloy monofilament comprises the following components in percentage by mass: 1.0 to 1.5 percent of iron, 0.03 to 0.08 percent of silicon, 0.02 to 0.08 percent of copper, 0.02 to 0.08 percent of manganese, 0.01 to 0.05 percent of magnesium, 0.01 to 0.08 percent of titanium, 0.01 to 0.08 percent of zirconium, 0.05 to 0.1 percent of chromium, 0.01 to 0.05 percent of strontium, 0.8 to 1.5 percent of rare earth, less than or equal to 0.1 percent of the sum of impurity contents and the balance of aluminum. The rare earth element is cerium, lanthanum or a mixture of cerium and lanthanum.
The preparation method of the rare earth high-iron aluminum alloy cable comprises the following steps:
and S1, preparing materials, and weighing the raw materials according to the set chemical components for later use.
S2, melting the aluminum ingot, putting the aluminum ingot with the purity higher than 99.8% into a melting furnace for melting, wherein the melting temperature is 750-.
And S3, smelting, adding the weighed raw materials into the heat-preserved aluminum liquid according to the component design, smelting in a smelting furnace, refining, degassing, and preserving heat after uniform smelting.
And S4, casting and forming, namely casting the smelted aluminum liquid and casting into aluminum strips.
And S5, rolling the cast aluminum strip by a rolling mill to form the rare earth high-iron aluminum alloy rod with phi 9 mm.
S6, drawing, namely drawing the rare earth high-iron aluminum alloy rod into an oval rare earth high-iron aluminum alloy monofilament by using a thirteen-die drawing machine; and twisting the rare earth high-iron aluminum alloy monofilament on a frame twist by adopting a special-shaped twisting die to form the rare earth high-iron aluminum alloy conductor 6.
S7, performing heat treatment, namely putting the rare earth high-iron aluminum alloy conductor 6 into an annealing furnace for annealing, wherein the annealing temperature is 300 +/-10 ℃, and the annealing time is 6-9 h; after the rare earth high-iron aluminum alloy conductor 6 is naturally cooled, an inorganic mineral insulating fireproof layer 5 and a cross-linked polyethylene insulating layer 4 are wrapped outside the rare earth high-iron aluminum alloy conductor 6, then a flame-retardant layer 2 is wrapped outside the cross-linked polyethylene insulating layer 4, a ceramic fire-resistant silicon rubber layer 3 is filled between the flame-retardant layer 2 and the cross-linked polyethylene insulating layer 4, a halogen-free filling strip 7 is filled between the rare earth high-iron aluminum alloy conductor 6, and then the sheath 1 is sleeved to form the rare earth high-iron aluminum alloy fireproof cable.
The elongation of the single rare earth high-iron aluminum alloy cable prepared by the method is more than or equal to 37 percent, the tensile strength is more than or equal to 121MPa, the 90-degree bending times are 38 times, the direct current resistivity at 20 ℃ is less than or equal to 0.028264, the electric conductivity is more than or equal to 62.0 percent IACS, the bending radius is more than or equal to 7D, the rebound performance of the rare earth high-iron aluminum alloy cable is reduced by 40 percent compared with that of a copper cable, and the creep resistance of the rare earth high-iron aluminum.
Therefore, the rare earth high-iron aluminum alloy fireproof cable has the characteristics of good fire resistance and fireproof performance, and the service life of the cable is prolonged; and has the advantage of good conductivity.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a tombarthite high-iron aluminum alloy fireproof cable which characterized in that: the cable comprises a rare earth high-iron aluminum alloy conductor and a protective layer, wherein at least two rare earth high-iron aluminum alloy conductors are arranged in the protective layer;
a fireproof layer and a first insulating layer are arranged outside the rare earth high-iron aluminum alloy conductor, the fireproof layer is positioned between the rare earth high-iron aluminum alloy conductor and the first insulating layer, and a second insulating layer is arranged between the first insulating layer and the protective layer;
the protective layer is provided with a concentric flame-retardant layer and a sheath in sequence from inside to outside, the sheath is located outside the flame-retardant layer, and a second insulating layer is arranged between the flame-retardant layer and the first insulating layer.
2. The rare earth high-iron aluminum alloy fireproof cable according to claim 1, characterized in that: the rare earth high-iron aluminum alloy conductor is formed by stranding a plurality of rare earth high-iron aluminum alloy monofilaments, and the rare earth high-iron aluminum alloy monofilaments are of an oval structure.
3. The rare earth high-iron aluminum alloy fireproof cable according to claim 1, characterized in that: the first insulating layer is a cross-linked polyethylene insulating layer, the second insulating layer is a ceramic fireproof silicone rubber layer, and the fireproof layer is an inorganic mineral insulating fireproof layer.
4. The rare earth high-iron aluminum alloy fireproof cable according to claim 1, characterized in that: the inside of inoxidizing coating is provided with 4 tombarthite high-speed railway aluminum alloy conductors, and 4 tombarthite high-speed railway aluminum alloy conductors are the circumference array around the axis of cable and distribute, are provided with between the tombarthite high-speed railway aluminum alloy conductor and do not have the steamed filler strip, do not have the steamed filler strip and set up with the cable is coaxial.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021493380.4U CN212209012U (en) | 2020-07-24 | 2020-07-24 | Rare earth high-iron aluminum alloy fireproof cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021493380.4U CN212209012U (en) | 2020-07-24 | 2020-07-24 | Rare earth high-iron aluminum alloy fireproof cable |
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| Publication Number | Publication Date |
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| CN212209012U true CN212209012U (en) | 2020-12-22 |
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|---|---|---|---|
| CN202021493380.4U Active CN212209012U (en) | 2020-07-24 | 2020-07-24 | Rare earth high-iron aluminum alloy fireproof cable |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231019 Address after: 918, Building B, Yonghuayuan, No. 6 Baotian Second Road, Chentian Community, Xixiang Street, Bao'an District, Shenzhen City, Guangdong Province, 518102 Patentee after: Shenzhen Zhongsheng Wanjia Investment Co.,Ltd. Address before: 918, unit 4, building B, yonghuayuan, No.6 Baotian 2nd Road, chentian community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Guangdong Xinyi Cable Co.,Ltd. |
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