CN104376919A - Method for manufacturing magnesium oxide insulated hollow-core composite cable - Google Patents
Method for manufacturing magnesium oxide insulated hollow-core composite cable Download PDFInfo
- Publication number
- CN104376919A CN104376919A CN201410582553.2A CN201410582553A CN104376919A CN 104376919 A CN104376919 A CN 104376919A CN 201410582553 A CN201410582553 A CN 201410582553A CN 104376919 A CN104376919 A CN 104376919A
- Authority
- CN
- China
- Prior art keywords
- magnesium oxide
- composite cable
- hollow
- idiosome
- stainless steel
- 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.)
- Granted
Links
Abstract
The invention belongs to a method for manufacturing cables, in particular to a method for manufacturing a magnesium oxide insulated hollow-core composite cable applied to a Tokamak fusion experimental device. According to the method for manufacturing the magnesium oxide insulated hollow-core composite cable, the rate of relative change between all layers of the cable is controlled by designing the dimension of a sheath and adopting the vacuum assembling and isostatic pressing technology, the electron beam welding technology and the deformation technologies such as the squeezing technology and the pulling technology, and then high-performance cables in different dimensions are obtained. The method for manufacturing the magnesium oxide insulated hollow-core composite cable has the advantages that the insulating property of the magnesium oxide insulated hollow-core composite cable manufactured with the method and composed of stainless steel, magnesium oxide and hollow-core copper is improved due to the fact that the density of a magnesium oxide layer is improved and the problem of moisture absorption of magnesium oxide in a traditional manufacturing technology is solved.
Description
Technical field
The invention belongs to a kind of cable preparation method, be specifically related to a kind of preparation method being applied to the magnesium oxide insulated hollow composite cable of tokamak fusion assay device.
Background technology
In order to suppress the unsteadiness of plasma, realize various tokamak fusion assay function, need to arrange multiple Inside coil in vacuum chamber as the core component of tokamak fusion assay device, comprise shielded coil, edge local mode and vertical judder coil in the various diagnosis coils of flux of plasma, high-intensity magnetic field, divertor alihnment coil, TBM Active Compensation coil etc.Because these Inside coils all will face the strong radiation environment (neutron irradiation and radiated by gamma-ray) of fusion reaction, working temperature higher (more than 300 degree), therefore can not adopt the common insulating material such as epoxy resin and glass fibre to realize the electric insulation of coil inside.
Current International Thermal-Nuclear Experimental Reactor (ITER) mainly adopts a kind of mineral insulation hollow cable (MIC) as internal vacuum chamber coil piece, and this mineral insulation hollow cable is three-decker: the armor of the hollow copper pipe of oxygen-free copper or zirconium chromium-copper, magnesium oxide insulated layer and stainless steel or nickel alloy.Preparation in the world about this composite cable be made up of stainless steel-magnesium oxide-hollow copper pipe adopts the mold pressing of interpolation binder method to make insulating oxide magnesium idiosome technology and roller die, drawing deformation technology usually.Add the purity that binding agent effectively can not improve its magnesium oxide layer, and enhance magnesian moisture-absorption characteristics, thus reduce the insulation property of magnesium oxide layer; Roller die extrudes and in drawing process, deflection is few, and passage is many, and power consumption is large, effectively can not improve the density of magnesium oxide layer simultaneously, reduce its insulation property.
Therefore, we have proposed a kind of preparation technology of new magnesium oxide insulated hollow composite cable, mainly in order to solve the easy moisture absorption of magnesium oxide in existing preparation technology and magnesium oxide density problem on the low side.The realization that this has outside three layers of compound, the composite cable of inner hollow core processes technology of preparing, will be significant with promoting to the special applications of this kind of insulated cable.
Summary of the invention
The object of this invention is to provide a kind of preparation method of magnesium oxide insulated hollow composite cable, stainless steel layer, magnesium oxide layer and hollow copper compound, by isostatic pressing technology and vacuum assembling, are become that three-decker is relatively stable, the compound idiosome of size uniform by it; The insulating barrier densification in compound idiosome is realized by employing extruding, drawing process.
The present invention is achieved in that a kind of preparation method of magnesium oxide insulated hollow composite cable, and it comprises the steps,
(1) three layers of Hollow Compound idiosome size are obtained according to three layers of compound idiosome thickness and deformation processing rate;
(2) stainless steel jacket is comprised stainless steel outer sleeve, the upper and lower end cap of stainless steel and hollow copper pipe to be dried by pickling, washing;
(3) adopt isostatic pressing process, high-purity magnesium oxide powder direct combination is put to stainless steel outer sleeve and hollow copper, form the first idiosome of hollow composite cable;
(4) adopt vacuum packaging technology, vacuumize assembling, and adopt electron beam welding, by its seal welding, make the idiosome becoming hollow composite cable;
(5) by compound idiosome at 800 ~ 1000 DEG C through the distortion of extrusion ratio 2 ~ 12 row large scale, improve internal oxidation magnesium layer density, in realization, inside and outside layer homogeneous deformation, obtain the extruding secondary idiosome of hollow composite cable;
(6) the hollow composite cable product of secondary idiosome acquiring demand size after several drawing elongation, shaping is extruded.
Advantage of the present invention is, through the magnesium oxide insulated hollow composite cable be made up of stainless steel-magnesium oxide-hollow copper prepared by the present invention, owing to improve the density of magnesium oxide layer and solving magnesian sucting wet problem in preparation technology, therefore the insulation property of composite cable are improved, and can realize following target component: the realized dimensional parameters of hollow composite cable is as follows: center bore>=10mm; Central copper thickness>=5mm; High-purity magnesium oxide thickness of insulating layer>=1.5mm; Stainless steel layer thickness>=3mm; The magnesium oxide layer insulation property of hollow composite cable are as follows: during direct current 2500V DC, the magnesium oxide layer resistance >100G Ω that 2.5mm is thick; In 3000V AC ac test, can ensure in 1min not breakdown; The magnesium oxide layer purity more than 99% of hollow composite cable, density is at 2.7g/cm
3above.
Accompanying drawing explanation
Fig. 1 is a kind of preparation method's flow chart of magnesium oxide insulated hollow composite cable;
Fig. 2 is composite cable jacket schematic diagram.
In figure, 1 cylindrical steel dummy block, 2 end plate bottoms, 3 stainless steel jackets, 4 end plate top covers, 5 copper pipes, 6 mineral insulation, electron beam welding sealing-in place of 7 jackets and end plate bottom, electron beam welding sealing-in place of 8 end plate bottoms and steel dummy block.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
As shown in Figure 1, a kind of preparation method of magnesium oxide insulated hollow composite cable, comprises the steps:
(1) first three layers of Hollow Compound idiosome size are obtained according to three layers of compound idiosome thickness and deformation processing rate;
(2) stainless steel jacket is comprised stainless steel outer sleeve, the upper and lower end cap of stainless steel and hollow copper pipe to be dried by pickling, washing;
(3) adopt isostatic pressing process, put in high-purity magnesium oxide powder direct combination to stainless steel outer sleeve and hollow copper (120 ~ 300MPa), form the first idiosome of hollow composite cable;
(4) adopt vacuum packaging technology, vacuumize assembling, and adopt electron beam welding (10 ~ 200mA welding current) by its seal welding, make the idiosome becoming hollow composite cable;
(5) compound idiosome is carried out large scale distortion at 800 ~ 1000 DEG C through extrusion ratio 2 ~ 12 (the idiosome area ratio before and after extruding), improve internal oxidation magnesium layer density, in realization, inside and outside layer homogeneous deformation, obtain the extruding secondary idiosome of hollow composite cable;
(6) the hollow composite cable product of secondary idiosome acquiring demand size after several drawing elongation, shaping is extruded.
Embodiment:
The preparation process of the magnesium oxide insulated hollow composite cable of a kind of outside dimension 45mm:
1, selection material: what this technology of preparing adopted is 316L stainless steel, and high-purity magnesium oxide powder (>99%), OFHC high-purity oxygen-free copper material are as raw material;
2, according to design processing ratio extrusion ratio 8 (before and after extruding sample in cross section area ratio) and each several part processing drawing, processing each several part parts, make stainless steel outer sleeve, hollow copper sheathing, two ends end cap, as shown in Figure of description 2;
3, adopt isostatic pressed 170MPa by magnesia powder compound in stainless steel outer sleeve, hollow copper sheathing, guarantee three layers relatively stable, obtain compound idiosome;
4, obtain compound idiosome through the soldering and sealing of vacuum electron beam welding 100mA welding current by 3, obtain constitutionally stable three layers of compound idiosome (external diameter is the Hollow Compound idiosome of 120mm);
5, at 950 DEG C, during extrusion speed 150mm/s, when extrusion ratio is 8, the rear idiosome (external diameter is the Hollow Compound body of 46mm) of extruding is obtained
6, through drawing, aligning and surface treatment, obtaining composite cable diameter is (external diameter 45mm, internal diameter is the Hollow Compound cable of 10mm)
7, through measuring: stainless steel external diameter 45mm, thickness is 3.5mm; Magnesium oxide layer external diameter is 38mm, and thickness is 2.5mm; Layers of copper diameter 33mm, thickness is 11.5mm, and center bore is 10mm; Magnesium oxide layer density is 2.75g/cm
3; Through test: it can at 2500VDC, up to 105G Ω resistance; In ac voltage withstanding test, can be not breakdown at 3000VAC continuous operation 1min.
Claims (2)
1. a preparation method for magnesium oxide insulated hollow composite cable, is characterized in that: it comprises the steps,
(1) three layers of Hollow Compound idiosome size are obtained according to three layers of compound idiosome thickness and deformation processing rate;
(2) stainless steel jacket is comprised stainless steel outer sleeve, the upper and lower end cap of stainless steel and hollow copper pipe to be dried by pickling, washing;
(3) adopt isostatic pressing process, high-purity magnesium oxide powder direct combination is put to stainless steel outer sleeve and hollow copper, form the first idiosome of hollow composite cable;
(4) adopt vacuum packaging technology, vacuumize assembling, and adopt electron beam welding, by its seal welding, make the idiosome becoming hollow composite cable;
(5) by compound idiosome at 800 ~ 1000 DEG C through the distortion of extrusion ratio 2 ~ 12 row large scale, improve internal oxidation magnesium layer density, in realization, inside and outside layer homogeneous deformation, obtain the extruding secondary idiosome of hollow composite cable;
(6) the hollow composite cable product of secondary idiosome acquiring demand size after repeatedly drawing elongation, shaping is extruded.
2. the preparation method of a kind of magnesium oxide insulated hollow composite cable as claimed in claim 1, is characterized in that: the force value in described step (3) is 120 ~ 300MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410582553.2A CN104376919B (en) | 2014-10-27 | 2014-10-27 | A kind of preparation method of magnesium oxide insulated hollow composite cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410582553.2A CN104376919B (en) | 2014-10-27 | 2014-10-27 | A kind of preparation method of magnesium oxide insulated hollow composite cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104376919A true CN104376919A (en) | 2015-02-25 |
| CN104376919B CN104376919B (en) | 2016-08-31 |
Family
ID=52555776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410582553.2A Active CN104376919B (en) | 2014-10-27 | 2014-10-27 | A kind of preparation method of magnesium oxide insulated hollow composite cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104376919B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883622A (en) * | 2019-01-18 | 2019-06-14 | 中国科学院合肥物质科学研究院 | Coil air-tightness detection method made of a kind of multi-layer compound structure conductor |
| CN112180423A (en) * | 2019-07-04 | 2021-01-05 | 核工业西南物理研究院 | Magnetic confinement nuclear fusion gamma ray detector with Compton inhibition function |
| CN114799752A (en) * | 2022-04-26 | 2022-07-29 | 核工业西南物理研究院 | Manufacturing method for water collecting pipe in vacuum chamber of Tokamak device |
| CN114914019A (en) * | 2022-05-20 | 2022-08-16 | 宝鸡拓普达钛业有限公司 | Insulating hollow composite cable conduit and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110495A (en) * | 2010-12-10 | 2011-06-29 | 久盛电气股份有限公司 | High-temperature resistant and radiation-resistant inorganic insulating hollow cable as well as manufacturing method and mold thereof |
| US20110253417A1 (en) * | 2009-09-15 | 2011-10-20 | John Mezzalingua Associates, Inc. | Corrosion resistant coaxial cable |
| CN103021577A (en) * | 2011-09-27 | 2013-04-03 | 中国电子科技集团公司第二十三研究所 | Implementation method of mineral insulated coaxial cable |
| CN103813497A (en) * | 2012-11-06 | 2014-05-21 | 杰宜斯科技有限公司 | Cable for high temperature and heat treatment device using the same |
-
2014
- 2014-10-27 CN CN201410582553.2A patent/CN104376919B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110253417A1 (en) * | 2009-09-15 | 2011-10-20 | John Mezzalingua Associates, Inc. | Corrosion resistant coaxial cable |
| CN102110495A (en) * | 2010-12-10 | 2011-06-29 | 久盛电气股份有限公司 | High-temperature resistant and radiation-resistant inorganic insulating hollow cable as well as manufacturing method and mold thereof |
| CN103021577A (en) * | 2011-09-27 | 2013-04-03 | 中国电子科技集团公司第二十三研究所 | Implementation method of mineral insulated coaxial cable |
| CN103813497A (en) * | 2012-11-06 | 2014-05-21 | 杰宜斯科技有限公司 | Cable for high temperature and heat treatment device using the same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883622A (en) * | 2019-01-18 | 2019-06-14 | 中国科学院合肥物质科学研究院 | Coil air-tightness detection method made of a kind of multi-layer compound structure conductor |
| CN112180423A (en) * | 2019-07-04 | 2021-01-05 | 核工业西南物理研究院 | Magnetic confinement nuclear fusion gamma ray detector with Compton inhibition function |
| CN114799752A (en) * | 2022-04-26 | 2022-07-29 | 核工业西南物理研究院 | Manufacturing method for water collecting pipe in vacuum chamber of Tokamak device |
| CN114799752B (en) * | 2022-04-26 | 2023-04-28 | 核工业西南物理研究院 | Manufacturing method of water collecting pipe in vacuum chamber of tokamak device |
| CN114914019A (en) * | 2022-05-20 | 2022-08-16 | 宝鸡拓普达钛业有限公司 | Insulating hollow composite cable conduit and preparation method thereof |
| CN114914019B (en) * | 2022-05-20 | 2024-05-07 | 宝鸡拓普达钛业有限公司 | Preparation method of insulating hollow composite cable conduit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104376919B (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104091651B (en) | A kind of extrusion process is prepared multicore MgB2The method of superconducting wire | |
| CN104376919A (en) | Method for manufacturing magnesium oxide insulated hollow-core composite cable | |
| CN107275002B (en) | A kind of preparation method of three aluminium superconducting wire presoma of niobium | |
| CN105869778B (en) | A kind of preparation method of high-strength high-conductivity copper niobium Multicore composite material | |
| CN104123997B (en) | Little copper is than the working method of NbTi/Cu superconducting wire | |
| CN104962798A (en) | Method for preparing high-silicon steel by powder sleeve forming | |
| CN103117114B (en) | A kind of copper and aluminium alloy are with the use of method | |
| CN108682509B (en) | Method for preparing iron-based superconducting composite strip | |
| CN104538543A (en) | Preparing method of NbTi rod for low-temperature superconducting wire rod | |
| CN101249526A (en) | Copper covered aluminum wire forming technique | |
| CN111105901B (en) | Improved bronze Nb method3Preparation method of Sn superconducting wire | |
| CN102982898B (en) | Method for manufacturing magnesium oxide mineral insulated cable with cold extrusion reducing forming method | |
| CN103606422B (en) | A kind of preparation method of high-strength high-conductivity copper-silver multi-core composite wire | |
| CN107350304A (en) | A kind of high-strength copper niobium composite wire and preparation method thereof | |
| CN103474175B (en) | Method for manufacturing Cu-Ta multi-core composite wire rod | |
| CN101673651A (en) | Millimeter wave traveling wave tube composite cellpacking and preparation method thereof | |
| CN108213108B (en) | Preparation method of high-strength high-conductivity copper-tantalum composite wire | |
| CN103611754B (en) | A kind of electric pulse assists tubing processing unit (plant) | |
| CN216054053U (en) | Insulated cable mold processing | |
| CN103681174B (en) | A kind of flat multi-level depressurization collector | |
| CN103390441B (en) | A kind of copper-clad aluminum alloy cable | |
| CN101441910A (en) | Method for manufacturing cuprum-packed magnetic conduction material conductor | |
| CN102831977B (en) | Preparation method for magnesium oxide fireproof cable | |
| CN113571254A (en) | Superfine cored wire multicore MgB2Method for preparing superconducting wire strip | |
| CN105070360A (en) | smooth outer conductor coaxial cable and production technology thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |