CN105575487A - Mineral insulation special cable - Google Patents
Mineral insulation special cable Download PDFInfo
- Publication number
- CN105575487A CN105575487A CN201410528896.0A CN201410528896A CN105575487A CN 105575487 A CN105575487 A CN 105575487A CN 201410528896 A CN201410528896 A CN 201410528896A CN 105575487 A CN105575487 A CN 105575487A
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- Prior art keywords
- inorganic
- special cable
- insulating barrier
- mineral insulation
- cable
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- Inorganic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a mineral insulation special cable. Copper conductors are disposed in an inorganic substance insulation layer formed by inorganic knob insulators and inorganic powder, which are arranged at intervals, in a wrapped manner. The inorganic knob insulators can be formed by sintering the inorganic powder. The outer part of the inorganic substance insulation layer is provided with a metal sheath layer. The sintered inorganic knob insulators in the insulation layer can be used to fix the copper conductors and prevent the radial motion of the copper conductors, and the bending performance of the mineral insulation special cable can be improved by the inorganic powder segments, and therefore the radial distance between the copper conductors and the metal sheath can be uniform, and the cable can be laid in a bent manner.
Description
Technical field
The invention belongs to special cable technical field, be especially applicable to nuclear power, oil, chemical industry, boats and ships and skyscraper etc. and fire prevention or corrosion resistance are required that high occasion uses.
Background technology
Recent two decades comes, and the fire-retardant and fire resistance of people to organic insulation or sheath material electric wire has carried out research extensively and profoundly, and the fire-retardant and fire-resisting cable product of many superior performances is succeeded in developing in succession; But regrettably, these organic materials still can discharge pernicious gas in combustion and produce thick smoke, and be difficult to ensure that some important electric wirings carry out work normally in fire process.And mineral insulated cable (being generally copper core copper sheath magnesium oxide insulating cable) is the safety-type cable that a kind of performance is very excellent, it fire-resistant, explosion-proof, high temperature resistant, not aging, not initiation fire and propagate kindling material, and the characteristic of any pernicious gas and smog can not be discharged around under ignition condition, be specially adapted to bad environments, the extra high place of security requirement or position, the fire-fighting system circuit of safe power supply under being especially useful in Fire Conditions, will be ensured.The multiple premium properties of mineral insulated cable, derives from its special construction, and the structure of existing mineral insulated cable is, copper core conductor outer wrapping inorganic matter (being generally magnesium oxide) does insulating barrier, and inorganic insulation layer peripheral hardware has seamless copper sheath.Due to the particularity that it uses material and structure, determine this product and there is organic cable (plastic cable) incomparable electric property, mechanical performance, environmental resistance and environmental-protecting performance.General mineral insulated cable Long-Time Service temperature is 250 DEG C, sustainable power supply 3 hours 950 DEG C ~ 1000 DEG C time, and short time or unusual time can close to the fusing point 1083 DEG C work (magnesium oxide insulated fusing point is 2800 DEG C) of copper.Existing insulating barrier or the porcelain knob for inorganic material powders (being generally magnesium oxide powder) sintering, make the not flexible of mineral insulated cable, inconvenient large produced in lengths; Insulating barrier is filling inorganic material powders (being generally magnesium oxide) in copper sheath, this makes the cable core of cable (being generally copper conductor) easily move radially in the inorganic material powders of insulating barrier, insulating barrier between copper conductor and copper sheath is apart from uneven, particularly when cable bend, make copper conductor closer from copper sheath, thus reduce insulation effect.
Summary of the invention
Not flexible in order to overcome existing mineral insulated cable, inconvenient large produced in lengths and the uneven deficiency of the insulation distance between conductor and sheath; The invention provides a kind of mineral insulation special cable, this mineral insulation special cable not only has the premium properties of general mineral insulated cable, also has and conveniently bends and facilitate the premium properties such as random length production.
The technical solution adopted for the present invention to solve the technical problems is: the copper conductor of mineral insulation special cable is wrapped in inorganic matter insulating barrier, be provided with metal sheath layer outside inorganic matter insulating barrier, the inorganic matter porcelain knob that inorganic matter insulating barrier is sintered by inorganic material powders and inorganic material powders interval form.
The length of every section of inorganic material powders in above-mentioned inorganic matter insulating barrier is between 0.5 meter to 1 meter.
A kind of prioritization scheme of above-mentioned inorganic material powders is: described inorganic powder is magnesium oxide powder or silicon oxide powder or alumina powder.
Above-mentioned metal sheath layer is copper sheath or stainless steel sheath or aluminum alloy sheath.
Aborning, the inorganic matter porcelain knob in described inorganic matter insulating barrier and inorganic material powders are preferably same inorganic material.Inorganic matter porcelain knob, due to sintering curing, makes copper conductor in it fix and not move radially; Every section of inorganic material powders is as a whole owing to not sintering, make easily bending of mineral insulated cable herein, and every section of inorganic material powders is owing to being fixed by inorganic matter porcelain knob at the short and two ends of length, and makes radially bending of the copper conductor in inorganic material powders suffer restraints.
Beneficial effect of the present invention is, the inorganic matter porcelain knob fixed copper conductor that insulating barrier both make use of sintering does not move radially, make use of again the bending property that inorganic material powders section improves mineral insulation special cable, the copper conductor in the present invention is compared with radial distance between metallic sheath evenly and cable can bend laying.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is cutaway view of the present invention.
1. copper conductors in figure, 2. seamless copper sheath, 3. Magnesium oxide knob insulator, 4. magnesium oxide powder.
Embodiment
In FIG, the copper conductor 1 of mineral insulation special cable is wrapped in inorganic matter insulating barrier, inorganic matter insulating barrier peripheral hardware has seamless copper sheath 2, the Magnesium oxide knob insulator 3 that inorganic matter insulating barrier is sintered by magnesium oxide powder and magnesium oxide powder 4 interval form, and the length of every section of magnesium oxide powder 4 is between 0.5 meter to 1 meter.
Claims (4)
1. a mineral insulation special cable, is characterized in that: its copper conductor is wrapped in inorganic matter insulating barrier, is provided with metal sheath layer outside inorganic matter insulating barrier, and the inorganic matter porcelain knob that inorganic matter insulating barrier is sintered by inorganic material powders and inorganic material powders interval form.
2. mineral insulation special cable according to claim 1, is characterized in that: the length of every section of inorganic material powders in described inorganic matter insulating barrier is between 0.5 meter to 1 meter.
3. mineral insulation special cable according to claim 1, is characterized in that: described inorganic powder is magnesium oxide powder or silicon oxide powder or alumina powder.
4. mineral insulation special cable according to claim 1, is characterized in that: described metal sheath layer is copper sheath or stainless steel sheath or aluminum alloy sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528896.0A CN105575487A (en) | 2014-10-10 | 2014-10-10 | Mineral insulation special cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528896.0A CN105575487A (en) | 2014-10-10 | 2014-10-10 | Mineral insulation special cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105575487A true CN105575487A (en) | 2016-05-11 |
Family
ID=55885524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410528896.0A Pending CN105575487A (en) | 2014-10-10 | 2014-10-10 | Mineral insulation special cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105575487A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111354505A (en) * | 2020-03-12 | 2020-06-30 | 广州市穗羽电线电缆有限公司 | Mineral insulation fireproof cable and preparation method thereof |
| CN111383796A (en) * | 2020-03-12 | 2020-07-07 | 广州市穗羽电线电缆有限公司 | Novel mineral insulated cable and preparation method thereof |
-
2014
- 2014-10-10 CN CN201410528896.0A patent/CN105575487A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111354505A (en) * | 2020-03-12 | 2020-06-30 | 广州市穗羽电线电缆有限公司 | Mineral insulation fireproof cable and preparation method thereof |
| CN111383796A (en) * | 2020-03-12 | 2020-07-07 | 广州市穗羽电线电缆有限公司 | Novel mineral insulated cable and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |