CN109346903A - A kind of manufacturing method of hot-face insulation copper bar - Google Patents
A kind of manufacturing method of hot-face insulation copper bar Download PDFInfo
- Publication number
- CN109346903A CN109346903A CN201811150523.9A CN201811150523A CN109346903A CN 109346903 A CN109346903 A CN 109346903A CN 201811150523 A CN201811150523 A CN 201811150523A CN 109346903 A CN109346903 A CN 109346903A
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- Prior art keywords
- copper bar
- hot
- manufacturing
- extrusion
- face insulation
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
- H01R25/14—Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/18—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing bases or cases for contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of manufacturing methods for the hot-face insulation copper bar being provided in the rail bar or busbar connector field of multiple separation link positions for matching piece, including copper bar is continuously extruded into copper bar by pressurizing unit；The copper bar lopping of extrusion forming is packed；It, will be on the copper bar of Mica tape after deployment by the copper bar expansion of lopping packaging；With extruder on the copper bar after wrapped mica tape extrusion molding silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating layer；Molding copper bar is detected；Lopping storage and etc..Hot-face insulation copper bar produced by the present invention has excellent fire resistance, environmental resistance.
Description
Technical field
The present invention relates to rail bar or busbar connector fields that multiple separation link positions are provided with for matching piece, and in particular to one
The manufacturing method of kind hot-face insulation copper bar.
Background technique
During high-building construction, there are many places to transmit electrical energy using power cable.It has many excellent
Point, the shortcomings that also having it: big specification power cable cannot have low-angle, otherwise can damage in manufacture, installation, use process
The performance of bad power cable.Copper bar is generallyd use in low-angle and carries out power transmission, and copper bar is compared to big specification electric power electricity
Cable has smaller connection angle while guaranteeing same power transmission performance.But traditional copper bar is more in use
For it is exposed in the environment, although preferably, the electric current passed through in copper bar is larger for heat dissipation in this way, is exposed to outer copper bar and is also easy
It is influenced to generate corrosion by environment, environmental resistance is poor, and there is also biggish electrical shock safety hazards.And copper bar not fire resisting,
When encountering local fire behavior, since external high fire radiates copper bar, causes copper bar to gather high temperature and easily power off, influence other key equipments
Use, lead to property loss and casualties.
Summary of the invention
The invention is intended to provide a kind of manufacturing method of hot-face insulation copper bar, to solve the problems, such as that existing copper bar is nonfireproof.
In order to achieve the above objectives, basic technology scheme of the invention is as follows: a kind of manufacturing method of hot-face insulation copper bar, packet
Include following steps:
A, copper bar is continuously extruded into copper bar by pressurizing unit；
B, the copper bar lopping of extrusion forming is packed；
C, the copper bar of lopping packaging is unfolded, it will be on the copper bar of Mica tape after deployment；
D, with extruder, extrusion molding silane crosslinked halogen-free low-smoke flame-proof polyolefin is exhausted on the copper bar after wrapped mica tape
Edge layer；
E, molding copper bar is detected；
F, lopping is put in storage.
The principle of this programme is: when practical application, copper bar is continuously extruded into copper bar, insulating materials include inner layer material and
Outer layer insulation material, primary insulation material are mica carrying material, and interior insulation is formed on copper bar with wrapped mode；Outer layer uses
Silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials, the copper bar after wrapped mica tape are formed on extruder with extrusion way
External insulation.Inner layer material electrical insulation properties are relatively good, and refractory ability is strong；The resistance to environment capacity of cladding material is very good, low temperature resistant,
Ultraviolet light, high temperature, anti-aging, waterproof, moisture-proof etc. are fine.
The advantages of this programme is: insulating materials is that two layers of insulation material is collectively formed, and interior insulation material is mica tape, electrically
Insulation performance is relatively good, and refractory ability is strong, can under the combustion case of 750 DEG C of high temperature normal power-up 90 minutes.External insulation material
Material is using silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials, and resistance to environment capacity is very good, low temperature resistant, ultraviolet light, height
Warm, anti-aging, anti-flammability, waterproof, moisture-proof etc. very well, when burning without or seldom discharge toxic smog.External insulation material
Long-term use temperature can greatly reinforce the comprehensive performance of external insulation at 125 DEG C or so, by the way of natural-crosslinked；Silicon
It is halogen-free factor in alkane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials, so that in the entire link of production, use, recycling
In, environmental pollution is seldom.
The hot-face insulation copper bar formed in this way, since it is allowed to keeping excellent big specification electric power for long row pattern in structure
Also the double-deck hot-face insulation that can be carried out normal mounting use while transmission performance under low-angle or right angle context, and use
Protective layer is more suitable for carrying out the high-power electric power of long length between floors with the excellent resistance to ambient dielectric performance of fire resisting
Transmission, and usage safety performance is high.
Further, copper bar carries out water removal oil removal treatment and the feeding in vacuum environment before progress is continuously extruded in step A,
The air pressure of vacuum environment is 0.05MPa.Water or oil as preferably avoidable in this way copper bar surface attachment is in continuously extruded process
In on copper bar surface form air blister defect, guarantee copper bar surface quality, can be to going water removal and oil by the vacuum environment of 0.05MPa
Copper bar carry out anti-oxidation isolation, copper bar clean surface is further ensured that, so that the copper bar better quality of extrusion molding.
Further, the pressurizing unit in step A includes extruding wheel, and the wheel face of extruding wheel, which is equipped with, squeezes slot, outside extruding wheel
Side is equipped with press shoe, and press shoe is equipped with the cambered surface portion being bonded with the wheel face of extruding wheel, forms arc between extruding wheel and press shoe
The extrusion chamber of shape is fixed with plug, the setting of another end opening, cambered surface of the extrusion chamber close to plug in the press shoe of extrusion chamber one end
Extrusion road is offered on portion's side wall, the vacuum box covered on the wheel face of extruding wheel is installed, very on the outside of extruding cavity open end
The rotation spray air-casing towards copper bar is equipped in sylphon.Pass through the opening after extruding slot positioning from extrusion chamber as preferred copper bar in this way
End insertion extruding wheel and press shoe between, extruding wheel rotation during copper bar and squeeze slot between frictional force by copper bar not
Break and pushed into extrusion chamber, the frictional heat generation of copper bar and extruding wheel makes copper bar be warming up to 625 DEG C, and then is squeezed and deformed from extrusion
Road discharge is shaped to copper bar, and copper bar, which enters before extrusion chamber, carries out circumferential jetting type water elimination oil removing with rotary jet set in vacuum box,
It can guarantee the molding excellent zero defect of copper bar surface quality, vacuum environment guarantees that copper bar to be extruded keeps clean.
Further, vacuum box is communicated with vacuum pump, and gearbox, the exhaust of vacuum pump are connected between vacuum pump and extruding wheel
End is connected to rotation spray air-casing, and rotation spray air-casing includes the annular sleeve for the hollow structure being fixed in vacuum box, rotation spray air-casing
Inner sidewall on be evenly distributed with multiple inclined gas vents in the same direction in a ring, the inner sidewall of rotation spray air-casing is in cone cylinder shape, cone
The bigger diameter end of cylinder is towards press shoe.As preferably rotating as vacuum pump and the power of rotary jet using extruding wheel in this way,
Can the effectively save energy, and formed to the rotational pressure air-flow on copper bar surface by the structure of rotation spray air-casing by copper bar surface
Water, oil or other impurities are washed off.
Further, water removal oil removal treatment is to be sent into rotation spray air-casing with vacuum pump intake-gas, and gas is sprayed from gas vent
The water and oil being attached on copper bar are blown away to copper bar surface injection swirling eddy out, the air pressure of swirling eddy is 3-9MPa.As
It is preferred that comprehensively the water, oil or impurity on surface can be removed from the circumferential direction of copper bar in this way, and the impact of air-flow will not be in copper bar
Surface is left a trace, and guarantees that stable friction can be kept between extruding wheel after copper bar enters extrusion chamber.
Further, in step C by mica tape on copper bar around double-baging, the lapping direction of two layers of mica tape is opposite.As
It is preferably formed two layers of staggered mica belt, copper bar surface is comprehensively coated, is carrying out squeezing out outer layer insulation
It can avoid the mobile dislocation of mica tape in the process, bending will not cause the mobile dislocation of mica tape in copper bar use process, protect
Card mica tape forms reliable and stable insulation blocking to copper bar.
Further, the extrusion pressure of extrusion molding is 50-80MPa, extruded velocity 50-100m/min in step D, is squeezed out
Temperature is 165-190 DEG C.Make molding outer layer silane crosslinked halogen-free low-smoke and flame retardant as the preferably such technology controlling and process of use
Crosslinked polyolefin insulating material density, thickness distribution are uniform, and performance is stablized, and have better environmental resistance.
Further, tubular molding tool is used when squeezing out in step D.As preferably in this way further such that the insulating layer formed
Thickness is uniform, and core shift is less prone in extrusion process, and molding insulating layer material is made due to being stretched orientation in extrusion process
With so that mechanical strength is higher, so that molding copper bar has better bending property, the installation for being more suitable for low-angle makes
With.
Further, used in step A copper content for 99% oxygen-free copper bar.As the copper purity for preferably guaranteeing copper bar in this way
Height has better electric property.
Further, copper bar with a thickness of 1-6mm, width 20-50mm.As being preferably more suitable for distinct device in this way
Use demand, has the bigger scope of application, and market value is higher.
Detailed description of the invention
Fig. 1 is the structure diagram of pressurizing unit in the embodiment of the present invention 1；
Fig. 2 is the axial cross-sectional view of rotation spray air-casing in the embodiment of the present invention 1.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description include: press shoe 1, extruding wheel 2, copper bar 3, vacuum box 4, rotation spray air-casing 5,
Gas vent 51, bigger diameter end 53, squeezes slot 6, extrusion chamber 7, plug 8, squeezes road 9 miner diameter end 52.
A kind of embodiment 1: manufacturing method of hot-face insulation copper bar, comprising the following steps:
A, the oxygen-free copper bar that copper content is 99% is continuously extruded into copper bar by pressurizing unit, as shown in connection with fig. 1, copper bar
Water removal oil removal treatment and the feeding in vacuum environment are carried out before progress is continuously extruded, the air pressure of vacuum environment is 0.05MPa, is removed
Water oil removal treatment is to be sent into rotation spray air-casing 5 with vacuum pump intake-gas, and gas is sprayed from gas vent 51 to copper bar surface and is sprayed
It penetrates swirling eddy and blows away the water and oil being attached on copper bar, the air pressure of swirling eddy is 3MPa；
B, the copper bar of extrusion forming wound into lopping and with plastic bag packaging, is filled with inert gas in polybag and is protected
It deposits, inert gas uses nitrogen；
C, the copper bar of lopping packaging is unfolded, by the copper bar of Mica tape after deployment, by mica tape on copper bar
Around double-baging, the lapping direction of two layers of mica tape is on the contrary, the wrapping angle of mica tape is 45 °；
D, with extruder and tubular molding tool on the copper bar after wrapped mica tape the low cigarette of extrusion molding silane crosslinked halogen-free
Fire retardant polyolefin insulating layer, extrusion pressure 50MPa, extruded velocity 50m/min, extrusion temperature are 165 DEG C；
E, high-temperature electric conduction performance is carried out to molding copper bar and resistance to environmental aging performance detects；
F, it is wound into and enspheres library preservation.
A kind of device for continuously extruding and molding copper bar is also provided in the present embodiment, as shown in Figure 1, include extruding wheel 2,
The wheel face of extruding wheel 2, which is equipped with, squeezes slot 6, press shoe 1 is equipped on the outside of extruding wheel 2, press shoe 1 is equipped with the wheel with extruding wheel 2
The cambered surface portion that face paste is closed forms the extrusion chamber 7 of arc, consolidates in the press shoe 1 of 7 one end of extrusion chamber between extruding wheel 2 and press shoe 1
Surely there are the plug 8 for blocking extrusion chamber 7, the setting of another end opening, extrusion chamber 7 offers crowded on the cambered surface portion side wall of plug 8
It engages in this profession, squeezes out road and be connected to extrusion die, the vacuum box covered on the wheel face of extruding wheel 2 is installed on the outside of extruding cavity open end
4, vacuum box 4 is interior to be equipped with rotation spray air-casing 5.
Vacuum box 4 is communicated with vacuum pump, is connected with speed-changing gear box between the shaft of vacuum pump and the shaft of extruding wheel 2,
The exhaust end of vacuum pump is connected to rotation spray air-casing 5, and as shown in connection with fig. 2, rotation spray air-casing 5 includes being fixed in vacuum box 4
The annular sleeve of hollow structure is evenly distributed with multiple inclined gas vents 51 in the same direction on the inner sidewall of rotation spray air-casing 5 in a ring,
The inner sidewall of rotation spray air-casing 5 is in cone cylinder shape, and the bigger diameter end 53 of cone cylinder is towards press shoe 1.
Copper bar 3 is penetrated from the miner diameter end 52 of cone cylinder when use, is pierced by from bigger diameter end 53, subsequently into the extruding of extruding wheel 2
In slot 6.Extruding wheel 2 drives vacuum pump fortune by speed-changing gear box while extruding wheel 2 rotates by additional motor driven
Turn, vacuum pump detaches the gas in vacuum box 4 to form negative pressure, in addition vacuum pump connects an air inlet pipe, the section of air inlet pipe
Product is less than the sectional area of vacuum pump and 4 connectivity part of vacuum box, forms metastable subnormal ambient in guarantee vacuum box 4 in this way.
The gas that vacuum box 4 detaches enters the bigger diameter end 53 of rotation spray air-casing 5, and gas flows in the toroidal cavity of rotation spray air-casing 5
And formed from the discharge of gas vent 51 from bigger diameter end 53 to the forced draft of 52 rotational flow of miner diameter end, forced draft is in a ring to copper
The surface of bar 3 is purged, so that water, oil or the other impurities on 3 surface of copper bar are detached from copper bar 3 under the impact of forced draft,
Water, oil or the other impurities of disengaging are discharged from the position that copper bar 3 enters rotation spray air-casing 5, and the copper bar 3 through over cleaning is using true
Enter in the extruding slot 6 of extruding wheel 2 after sylphon 4.Lasting low pressure takes out the gas entered on a small quantity quickly in vacuum box 4
From the copper bar 3 after cleaning will not be oxidized in vacuum box 4, and 3 surface quality of copper bar is more excellent.
Constantly enter extrusion chamber 7 under frictional force effect of the copper bar 3 of slot 6 between extruding wheel 2 into squeezing, while
Rubbing action issues that thermal change is soft, and temperature can be increased to 625 DEG C, positioned at extrusion chamber 7 close to the copper bar 3 of 8 side of plug soften after
Continue under the pushing of the copper bar 3 of extrusion chamber 7 from squeeze out road squeeze out, and then by extrusion die be extruded into it is homogeneous,
The flawless copper bar in surface.
Embodiment 2, the difference of the present embodiment and embodiment 1 be only that the air pressure of swirling eddy for 6MPa, crosslinked with silicane without
The extrusion pressure of halogen low-smoke flame-proof polyolefin insulating layer is 65MPa, and extruded velocity 70m/min, extrusion temperature is 175 DEG C.
Embodiment 3, the difference of the present embodiment and embodiment 1 be only that the air pressure of swirling eddy for 9MPa, crosslinked with silicane without
The extrusion pressure of halogen low-smoke flame-proof polyolefin insulating layer is 80MPa, and extruded velocity 100m/min, extrusion temperature is 190 DEG C.
Claims (10)
1. a kind of manufacturing method of hot-face insulation copper bar, it is characterised in that: include the following steps,
A, copper bar is continuously extruded into copper bar by pressurizing unit；
B, the copper bar lopping of extrusion forming is packed；
C, the copper bar of lopping packaging is unfolded, it will be on the copper bar of Mica tape after deployment；
D, with extruder on the copper bar after wrapped mica tape extrusion molding silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating layer；
E, molding copper bar is detected；
F, lopping is put in storage.
2. a kind of manufacturing method of hot-face insulation copper bar according to claim 1, it is characterised in that: copper in the step A
Bar carry out it is continuously extruded before carry out water removal oil removal treatment and the feeding in vacuum environment, the air pressure of vacuum environment be
0.05MPa。
3. a kind of manufacturing method of hot-face insulation copper bar according to claim 2, it is characterised in that: in the step A
Pressurizing unit includes extruding wheel, and the wheel face of extruding wheel, which is equipped with, squeezes slot, is equipped with press shoe on the outside of extruding wheel, press shoe is equipped with
The cambered surface portion being bonded with the wheel face of extruding wheel, forms the extrusion chamber of arc between extruding wheel and press shoe, extrusion chamber one end is squeezed
Plug, the setting of another end opening are fixed on pressure shoes, extrusion chamber offers extrusion road on the cambered surface portion side wall of plug, squeezes out
The vacuum box covered on the wheel face of extruding wheel is installed on the outside of chamber open end, the rotation spray towards copper bar is equipped in vacuum box
Air-casing.
4. a kind of manufacturing method of hot-face insulation copper bar according to claim 3, it is characterised in that: the vacuum box connection
There is vacuum pump, gearbox is connected between vacuum pump and extruding wheel, the exhaust end of vacuum pump is connected to rotation spray air-casing, rotation spray
Air-casing includes the annular sleeve for the hollow structure being fixed in vacuum box, is evenly distributed in a ring on the inner sidewall of rotation spray air-casing
Multiple inclined gas vents in the same direction, the inner sidewall of rotation spray air-casing are in cone cylinder shape, and the bigger diameter end of cone cylinder is towards press shoe.
5. a kind of manufacturing method of hot-face insulation copper bar according to claim 4, it is characterised in that: at the water removal oil removing
Gas is sprayed from gas vent to copper bar surface injection swirling eddy and is blown to be sent into rotation spray air-casing with vacuum pump intake-gas by reason
Walk to be attached to the water and oil on copper bar, the air pressure of swirling eddy is 3-9MPa.
6. a kind of manufacturing method of hot-face insulation copper bar according to claim 1, it is characterised in that: will in the step C
For mica tape around double-baging on copper bar, the lapping direction of two layers of mica tape is opposite.
7. a kind of manufacturing method of hot-face insulation copper bar according to claim 1, it is characterised in that: squeezed in the step D
Molding extrusion pressure is 50-80MPa out, and extruded velocity 50-100m/min, extrusion temperature is 165-190 DEG C.
8. a kind of manufacturing method of hot-face insulation copper bar according to claim 1, it is characterised in that: squeezed in the step D
Tubular molding tool is used when out.
9. a kind of manufacturing method of hot-face insulation copper bar according to claim 1, it is characterised in that: adopted in the step A
The oxygen-free copper bar for being 99% with copper content.
10. a kind of manufacturing method of hot-face insulation copper bar according to claim 1, it is characterised in that: the thickness of the copper bar
Degree is 1-6mm, width 20-50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811150523.9A CN109346903B (en) | 2018-09-29 | 2018-09-29 | Manufacturing method of fire-resistant insulated copper bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811150523.9A CN109346903B (en) | 2018-09-29 | 2018-09-29 | Manufacturing method of fire-resistant insulated copper bar |
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| Publication Number | Publication Date |
|---|---|
| CN109346903A true CN109346903A (en) | 2019-02-15 |
| CN109346903B CN109346903B (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811150523.9A Active CN109346903B (en) | 2018-09-29 | 2018-09-29 | Manufacturing method of fire-resistant insulated copper bar |
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| CN101564737A (en) * | 2009-05-14 | 2009-10-28 | 江苏金奕达铜业股份有限公司 | Continuous extrusion production device of C shaped copper material and application thereof |
| CN201493338U (en) * | 2009-07-29 | 2010-06-02 | 常州市正和电磁线有限公司 | Copper strap wire squeezing machine |
| CN201765873U (en) * | 2010-08-06 | 2011-03-16 | 沈阳汇成电缆集团有限公司 | Fully flame-retardant and fire-proof armored silicane cross-linked power cable |
| CN102290156A (en) * | 2011-06-16 | 2011-12-21 | 宁波科鑫腐蚀控制工程有限公司 | Insulating corrosion prevention method for conductive copper bar |
| CN103377777A (en) * | 2012-04-17 | 2013-10-30 | 上海新益电力线路器材有限公司 | Water removing device for cable surface |
| CN103921071A (en) * | 2014-04-16 | 2014-07-16 | 黄学志 | Oxygen-free copper bar production technology |
| CN204117630U (en) * | 2014-08-08 | 2015-01-21 | 上海振大电器成套有限公司 | A kind of shielding insulation copper bar |
| US20160260524A1 (en) * | 2015-03-03 | 2016-09-08 | General Cable Technologies Corporation | Cables formed from halogen-free compositions having fire retardant properties |
-
2018
- 2018-09-29 CN CN201811150523.9A patent/CN109346903B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564737A (en) * | 2009-05-14 | 2009-10-28 | 江苏金奕达铜业股份有限公司 | Continuous extrusion production device of C shaped copper material and application thereof |
| CN201493338U (en) * | 2009-07-29 | 2010-06-02 | 常州市正和电磁线有限公司 | Copper strap wire squeezing machine |
| CN201765873U (en) * | 2010-08-06 | 2011-03-16 | 沈阳汇成电缆集团有限公司 | Fully flame-retardant and fire-proof armored silicane cross-linked power cable |
| CN102290156A (en) * | 2011-06-16 | 2011-12-21 | 宁波科鑫腐蚀控制工程有限公司 | Insulating corrosion prevention method for conductive copper bar |
| CN103377777A (en) * | 2012-04-17 | 2013-10-30 | 上海新益电力线路器材有限公司 | Water removing device for cable surface |
| CN103921071A (en) * | 2014-04-16 | 2014-07-16 | 黄学志 | Oxygen-free copper bar production technology |
| CN204117630U (en) * | 2014-08-08 | 2015-01-21 | 上海振大电器成套有限公司 | A kind of shielding insulation copper bar |
| US20160260524A1 (en) * | 2015-03-03 | 2016-09-08 | General Cable Technologies Corporation | Cables formed from halogen-free compositions having fire retardant properties |
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| CN109346903B (en) | 2020-05-12 |
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