CN101770834A - Radiation resisting signal cable for third generation nuclear power plant and production method - Google Patents
Radiation resisting signal cable for third generation nuclear power plant and production method Download PDFInfo
- Publication number
- CN101770834A CN101770834A CN200810205092A CN200810205092A CN101770834A CN 101770834 A CN101770834 A CN 101770834A CN 200810205092 A CN200810205092 A CN 200810205092A CN 200810205092 A CN200810205092 A CN 200810205092A CN 101770834 A CN101770834 A CN 101770834A
- Authority
- CN
- China
- Prior art keywords
- nuclear power
- radiation
- signal cable
- temperature
- generation nuclear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000004020 conductor Substances 0.000 claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000010949 copper Substances 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000004697 Polyetherimide Substances 0.000 claims description 13
- 229920001601 polyetherimide Polymers 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- 238000009941 weaving Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000012856 packing Methods 0.000 abstract 2
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- 239000004962 Polyamide-imide Substances 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000004980 dosimetry Methods 0.000 abstract 1
- 229920002312 polyamide-imide Polymers 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000003063 flame retardant Substances 0.000 description 6
- 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 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009954 braiding Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Images
Landscapes
- Insulated Conductors (AREA)
Abstract
The invention relates to a radiation resisting signal cable for a third generation nuclear power plant and a production method. The cable comprises a conductor 1, an insulation layer 2, a cable element 3, a packing layer 4, a packing belt 5, a shielding layer 6 and an outer sheath 7, wherein the conductor adopts the first or the second class conductor structure specified in the GB/T3956; the thickness of the insulation layer conforms to the regulations specified in the TB/T2476; the shielding layer is weaved by brass wires or wrapped by the copper wires or by the al/plastic compound tapes; the thickness of the outer sheath conforms to the regulations specified in the TB/T2476; the cable element is a twist pair group or a triple wire group or a quintuple wire group. The production method is characterized in that the polyamide-imide material and special process are used, so that the produced cable has the service life of over fifty years, and the accumulated irradiation dosimetry is not lower than 850 KGy.
Description
Technical Field
The invention relates to a radiation-resistant signal cable for a third-generation nuclear power station and a manufacturing method thereof, and belongs to the technical field of cables.
Background
In recent years, the development of the nuclear power industry in China is rapid, the proportion of nuclear power in the total power generation amount is increased from 1.8% to 4% by 2020, the 1E-grade cable for the nuclear power station is conservatively estimated to reach 40 million yuan per year on average, and the cable for the nuclear power station has wide market prospect.
The cable used in the nuclear power station has basically the same variety as that of the common thermal power plant, but has larger difference in material composition and test items. Radiation-resistant cables for nuclear power plants are installed in containment vessels, the cables being capable of performing their prescribed functions under seismic loads and in normal accident situations and/or after an accident. The cable requires that the cumulative irradiation dose at least reaches 850kGy (kilogray) through a design reference event test. The cable is influenced by severe conditions such as gamma ray radiation, LOCA environmental aging and the like for a long time during operation, so that the key problems of materials, production processes and the like need to be solved. Technicians of the company specially design a radiation-resistant signal cable for a third-generation nuclear power station through research and application of a new material.
The main difficulties in the development of radiation-resistant signal cables for third-generation nuclear power stations are that the radiation resistance, the harsh environment resistance and the halogen-free low-smoke high-flame-retardant property of the cables are integrated, and the conventional polyolefin materials cannot be adopted to solve the difficulties. Therefore, through a large number of experimental researches, the inventor of the invention designs a reasonable cable structure, and adopts a special polyetherimide material and process for the insulation and sheath processing of the cable, so that the performance of the finished cable completely meets the requirements of the radiation-resistant signal cable for the third-generation nuclear power station.
Disclosure of Invention
The invention aims to provide a radiation-resistant signal cable for a third-generation nuclear power station and a manufacturing method thereof.
As mentioned above, the main difficulty in the development of the radiation-resistant signal cable for the third generation nuclear power station is that the cable integrates radiation resistance, adverse environment resistance, halogen-free low-smoke high-flame resistance, and only one performance index is considered, so that the difficulty in product development is greatly improved. The invention firstly starts with the development of new materials, selects special polyetherimide materials and processes, and finds that the materials have the following excellent properties through tests:
(1) the cable has excellent electrical performance and mechanical performance, and completely meets the requirements of low-voltage cables;
(2) the radiation resistance is 4000kGy, which is far higher than 850kGy required by 1E-level K1 cables of a nuclear power station;
(3) the flame retardant property is good, the oxygen index reaches 48 and is far higher than 35 of the common high flame retardant material;
(4) the low smoke density is good, and the environmental protection performance completely meets the requirement of environmental protection instruction of European Union;
(5) the paint has good chemical resistance and can resist chemical substances such as mineral oil, acid, alkali, ozone and the like;
(6) the high-temperature resistant performance is achieved, and the working temperature reaches 130-150 ℃.
The material is inherently suitable for being used in the nuclear power station environment, so the key point of the invention is to research the processing technology of the material. Through multiple experimental processing and extrusion, the invention provides a reasonable extrusion processing technology.
As shown in fig. 1, the radiation signal cable for the third generation nuclear power station provided by the invention is composed of a conductor, an insulating layer, a cabling element, a filling layer, a wrapping tape, a shielding layer and an outer sheath in sequence.
The cabling element of the radiation-resistant signal cable for the third-generation nuclear power station provided by the invention is a pair-twisted group, a three-wire group or a four-wire group, and the section of a conductor wire core of the cable is circular. Wherein:
(1) a conductor:
the conductor adopts a class 1 or class 2 conductor structure specified in GB/T3956, the surface of the conductor can be plated with tin or not plated with tin, and the conductor has smooth surface and no burrs or scratches.
(2) Insulating layer:
the polyetherimide insulating material is adopted, the insulating thickness meets the specification of the TB/T2476 standard, and the insulating wire core is ensured to have good radiation resistance, environmental protection, high flame retardance and electrical insulating property.
(3) A cabling element:
according to the requirements of different twisting elements, insulated wire cores with different colors or numbers are adopted to produce a plurality of forms of twisted pairs, three-wire sets and four-wire sets.
(4) Filling layer:
the filling layer adopts alkali-free glass fiber ropes, so that the high flame retardance and the roundness of the product are ensured. The bag strap adopts non-hygroscopic bag strap, plays the performance of tighten.
(5) A shielding layer:
the shielding can be divided into various structural forms of copper wire braided shielding, copper strips and aluminum-plastic composite strips, the braiding density of a copper wire braided shielding layer is not less than 85%, the copper strip wrapped shielding adopts copper strip overlapping wrapping with the thickness of not less than 0.05mm, the aluminum-plastic strip wrapped shielding adopts single-side aluminum-plastic composite strip overlapping wrapping with the thickness of not less than 0.05mm, and a single-side aluminum-plastic composite strip overlapping wrapping with the cross section of not less than 0.5mm is longitudinally arranged on the inner side of the shielding layer2The copper wire is used as a drainage wire.
(6) Outer sheath:
the outer sheath is made of polyetherimide sheath material, and the thickness of the sheath meets the specification of TB/T2476 standard, so that the cable has strong radiation resistance, and simultaneously has good environmental corrosion resistance and flame retardance. Enabling the cable to effectively withstand the long-term nuclear radiation capabilities of a nuclear power plant.
The cable provided by the invention is processed into a cable by a high-temperature extruding machine, and is characterized in that:
(1) and processing the mixture in a high-temperature extruding machine, wherein the length-diameter ratio L/D is 25-30.
(2) And compression ratio: 2.1-2.7: 1.
(3) The polyetherimide material of the insulating layer and the outer sheath needs to be dried for 6 hours before use, and the drying temperature is 110 ℃.
(4) The conductor needs to be preheated: the preheating temperature is controlled to be 65-95 ℃.
(5) Temperature control range of each section:
| a region | Two zones | Three zones | Flange | Machine head |
| 280～290℃ | 280～290℃ | 290～300℃ | 295～315℃ | 300～320℃ |
Therefore, the polyetherimide new material has the characteristic of high-temperature extrusion, the material needs to be heated and dried for 6 hours before being processed, the processing performance of the material is guaranteed, meanwhile, the processing temperature needs to be controlled, and the temperature of an extruding machine is controlled within a reasonable range of 280-320 ℃, so that the electrical insulation performance, the heat resistance, the radiation resistance, the mechanical strength, the stress cracking resistance, the flame retardance, the chemical corrosion resistance and other performances of the material can be fully embodied.
The radiation-resistant signal cable for the third-generation nuclear power station provided by the invention has the following characteristics:
1. except for general characteristic indexes: besides meeting the requirement of TB/T2476 standard, the special performance indexes are as follows:
(1) thermal life: the service life of the cable is more than 50 years.
(2) Irradiation dose, simulated LOCA-HELB performance: the cumulative irradiation dose is not less than 850 kGy.
2. The provided cable meets the requirements of flame retardance of class A in a GB/T18380.3 bundled combustion test, and the cable insulation wire core meets the requirements of a GB/T18380.1 single vertical combustion test.
3. The provided cable has better shock resistance and bending performance.
Drawings
Fig. 1 is a cabling element of a radiation-resistant signal cable for a third generation nuclear power plant provided by the present invention, a) a twisted pair; b) a three-wire set; c) and a quad group.
Fig. 2 is a schematic structural diagram of a radiation-resistant signal cable for a third-generation nuclear power station provided by the invention.
Fig. 3 shows a process flow of the cable according to the invention.
In the figure, 1 conductor; 2 an insulating layer; 3 a cabling element; 4 a filling layer; 5, wrapping the belt; 6 a shielding layer; 7 outer sheath.
Detailed Description
The following examples are provided to further illustrate the substantial features and significant advances of the present invention.
Example 1
The cabling elements are described as twisted pairs. The third generation nuclear power station radiation-resistant signal cable is composed of a conductor 1, an insulating layer 2, a pair-twisted group 3, a filling layer 4, a wrapping tape 5, a shielding layer 6 and an outer sheath 7.
Wherein:
the conductor adopts a copper conductor structure specified in GB/T3956, can be tinned or not, and has a clean surface without burrs and scratches; the insulating layer is made of polyetherimide insulating material, so that the insulating wire core is ensured to have good radiation resistance, environmental protection, high flame retardance and electrical insulating property; the cabling elements should be twisted pair-twisted sets;
the filling layer adopts alkali-free glass fiber ropes as filling materials, so that high flame retardance and roundness of the product are guaranteed. The wrapping tape adopts non-hygroscopic wrapping tape.
The shielding layer can be divided into a plurality of structural forms of a copper wire braided shield, a copper strip and an aluminum-plastic composite tape, the braiding density of the copper wire braided shield is not less than 85%, the copper strip lapping shield adopts a copper strip overlapping lapping with the thickness not less than 0.05mm, and the aluminum-plastic tape lapping shield adopts a single-side aluminum-plastic composite tape overlapping lapping with the thickness not less than 0.05 mm.
The outer sheath is made of polyetherimide sheath material, so that the cable has strong radiation resistance, and simultaneously has good environmental corrosion resistance and flame retardance. Although the flame retardant property of the common flame-retardant polyolefin sheath material can meet the requirements of A class, the common flame-retardant polyolefin sheath material is easy to crack after an irradiation test and cannot meet the requirements of an environmental test, so that only a brand-new polyetherimide sheath material is found, and the cable can effectively withstand the long-term nuclear radiation capability of a nuclear power station.
The radiation-resistant signal cable of the third-generation nuclear power station is processed by a high-temperature extruder, the length-diameter ratio is 27-28, the compression ratio is 2.5: 1, the used polyetherimide insulating layer and the used sheath material are dried for 6 hours before use, the drying temperature is 110 ℃, preheating is needed before extrusion, the preheating temperature is 80-85 ℃, and then the temperature of each area is controlled to be extruded at high temperature.
Example 2
The cabling elements are three wire sets as in example 1.
Example 3
The cabling elements, four-core cables are directly twisted into four-wire sets, as in example 1.
Claims (9)
1. The radiation-resistant electric signal cable for the third-generation nuclear power station is characterized by sequentially consisting of a conductor (1), an insulating layer (2), a cabling element (3), a filling layer (4), a wrapping tape (5), a shielding layer (6) and an outer sheath (7); wherein,
firstly, a conductor adopts a 1 st or 2 nd conductor structure specified in GB/T3956;
the thickness of the insulating layer is combined with the specification of TB/T2476 standard;
the shielding layer is a copper wire woven, copper strip wrapped or aluminum-plastic composite strip;
the thickness of the outer sheath conforms to the regulation of the TB/T2476 standard;
fifthly, the cabling element is a pair-twisting group, a three-wire group or a four-wire group.
2. The radiation-resistant electrical signal cable for a third generation nuclear power plant as recited in claim 1, wherein the surface of said conductor is plated or un-plated with tin.
3. The radiation-resistant electrical signal cable for a third generation nuclear power plant as recited in claim 1, wherein the conductor core has a circular cross-section.
4. The radiation-resistant electrical signal cable for a third generation nuclear power plant as recited in claim 1, wherein said quad configuration is formed by directly stranding quad cables.
5. The radiation-resistant electrical signal cable for the third generation nuclear power station as claimed in claim 1, wherein the weaving density of the copper wire shielding layer is not less than 85%; the copper strip lapping shielding adopts copper strips with the thickness not less than 0.05mm to be lapped in an overlapping way; the aluminum tape is wrapped with a single-sided aluminum type composite tape with the thickness not less than 0.05mm, and a section not less than 0.5mm is longitudinally arranged on the inner side of the shielding layer2The copper wire is used as a drainage wire.
6. The radiation-resistant electrical signal cable for a third generation nuclear power plant as recited in claim 1, wherein the insulating layer and the outer jacket are made of polyetherimide; the filling is alkali-free glass fiber rope.
7. The method for preparing the radiation-resistant electric signal cable for the third-generation nuclear power station as claimed in any one of claims 1 to 6 adopts a high-temperature extrusion molding processing technology, and is characterized in that:
(1) the length-diameter ratio L/D is 25-30;
(2) the compression ratio is 2.1-2.7: 1;
(3) drying the polyetherimide material for the insulating layer and the outer sheath for 6 hours before use;
(4) preheating the conductor at 65-95 ℃;
(5) the temperature of the plastic extruding machine is controlled to be 280-320 DEG C
8. A method of making a radiation-resistant electrical signal cable for a third generation nuclear power plant as claimed in claim 7, wherein the temperature control of the extruder is: the temperature of the first zone is 280-290 ℃, the temperature of the second zone is 280-290 ℃, the temperature of the third zone is 290-300 ℃, the temperature of the flange is 295-315 ℃, and the temperature of the machine head is 300-320 ℃.
9. The method of claim 7, wherein the pre-polyether imide is dried at a temperature of about 110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810205092A CN101770834A (en) | 2008-12-30 | 2008-12-30 | Radiation resisting signal cable for third generation nuclear power plant and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810205092A CN101770834A (en) | 2008-12-30 | 2008-12-30 | Radiation resisting signal cable for third generation nuclear power plant and production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101770834A true CN101770834A (en) | 2010-07-07 |
Family
ID=42503641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810205092A Pending CN101770834A (en) | 2008-12-30 | 2008-12-30 | Radiation resisting signal cable for third generation nuclear power plant and production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101770834A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578660A (en) * | 2013-11-05 | 2014-02-12 | 四川明星电缆股份有限公司 | Method for manufacturing low-voltage power cable used in third-generation nuclear power station containment vessel |
| CN105469896A (en) * | 2015-12-10 | 2016-04-06 | 成都绿迪科技有限公司 | Communication cable |
| CN106298054A (en) * | 2016-11-08 | 2017-01-04 | 四川明星电缆股份有限公司 | A kind of generation Ⅲ nuclear power station communication cable and design and production method |
| CN107274978A (en) * | 2017-06-23 | 2017-10-20 | 安徽华星电缆集团有限公司 | Flat type cable and preparation method thereof |
| CN108133786A (en) * | 2017-12-29 | 2018-06-08 | 通鼎互联信息股份有限公司 | A kind of low frequency radiation protection used in nuclear power station information transmission cable |
-
2008
- 2008-12-30 CN CN200810205092A patent/CN101770834A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578660A (en) * | 2013-11-05 | 2014-02-12 | 四川明星电缆股份有限公司 | Method for manufacturing low-voltage power cable used in third-generation nuclear power station containment vessel |
| CN103578660B (en) * | 2013-11-05 | 2016-10-05 | 四川明星电缆股份有限公司 | The manufacture method of the generation Ⅲ nuclear power station interior lv power cable of containment |
| CN105469896A (en) * | 2015-12-10 | 2016-04-06 | 成都绿迪科技有限公司 | Communication cable |
| CN106298054A (en) * | 2016-11-08 | 2017-01-04 | 四川明星电缆股份有限公司 | A kind of generation Ⅲ nuclear power station communication cable and design and production method |
| CN106298054B (en) * | 2016-11-08 | 2019-01-11 | 尚纬股份有限公司 | A kind of generation Ⅲ nuclear power station communication cable and design and production method |
| CN107274978A (en) * | 2017-06-23 | 2017-10-20 | 安徽华星电缆集团有限公司 | Flat type cable and preparation method thereof |
| CN108133786A (en) * | 2017-12-29 | 2018-06-08 | 通鼎互联信息股份有限公司 | A kind of low frequency radiation protection used in nuclear power station information transmission cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104715840B (en) | The maritime platform essential safe type oil resistant fireproof cable of resistance to mud and preparation technology | |
| CN103578660B (en) | The manufacture method of the generation Ⅲ nuclear power station interior lv power cable of containment | |
| CN102347109A (en) | Manufacture method for low-voltage electric power cable used for nuclear power station | |
| CN110690008A (en) | Radiation-resistant small-section high-voltage direct-current cable for nuclear power station and manufacturing method thereof | |
| CN101770834A (en) | Radiation resisting signal cable for third generation nuclear power plant and production method | |
| CN103426556A (en) | Low-smoke halogen-free flame-retardant power cable | |
| CN211529645U (en) | Super flexible mineral substance fireproof cable | |
| CN211788265U (en) | Double-layer co-extrusion flame-retardant fire-resistant cable | |
| CN202189578U (en) | Thin wall cable for railroad locomotive | |
| CN213781632U (en) | Special control cable with ozone resistance for offshore wind turbine | |
| CN211181711U (en) | Radiation-resistant, wear-resistant, flame-retardant and environment-friendly cable | |
| CN204423958U (en) | The maritime platform essential safe type oil resistant fireproof cable of resistance to mud | |
| CN115376728A (en) | Aluminum alloy conductor dual-core dual-steel-tape armored photovoltaic cable and manufacturing method thereof | |
| CN217880882U (en) | Radiation-resistant flexible antimagnetic cable with temperature of more than 300 ℃ for hydrogen igniter of nuclear power station | |
| CN205751679U (en) | A kind of cracking resistance cable | |
| CN212010403U (en) | Long-life, waterproof, environment-friendly cable | |
| CN209912597U (en) | Ultraviolet irradiation resistant nuclear-grade lighting cable | |
| CN204792117U (en) | Water -resistant tree, fire -resistant, anticorrosive, waterproof 110kV and above plastic insulation power cable | |
| CN209912596U (en) | Isolated medium-voltage fire-resistant cable | |
| CN201025585Y (en) | Low smoke no halogen combustion retarding cable | |
| CN201622873U (en) | Flame-retardant fire-resistant variable-frequency cable | |
| CN201364761Y (en) | Third-generation radiation resistance signal cable for nuclear power plants | |
| CN218866736U (en) | Aluminum alloy conductor twin-core double-steel-tape armored photovoltaic cable | |
| CN205582601U (en) | Low smoke and zero halogen anti ultraviolet flame retarded cable | |
| CN219512843U (en) | High-conductivity cable for intelligent power grid housing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100707 |