CN105655011A - Flexible mineral insulated cable and production method thereof - Google Patents
Flexible mineral insulated cable and production method thereof Download PDFInfo
- Publication number
- CN105655011A CN105655011A CN201610199743.5A CN201610199743A CN105655011A CN 105655011 A CN105655011 A CN 105655011A CN 201610199743 A CN201610199743 A CN 201610199743A CN 105655011 A CN105655011 A CN 105655011A
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- insulated
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- cable
- mud
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a flexible mineral insulated cable and a production method thereof. The flexible mineral insulated cable comprises cable core conductors, insulated layers and a sheath. An inner calcined mica insulated tape wraps every cable core conductor tightly, an outer calcined mica insulated tape wraps every inner calcined mica insulated tape, and the insulated layer wraps every outer calcined mica insulated tape by extruding so as to form one insulated wire. A glass fiber filling rope is arranged in a gap among the insulated wires which are stranded into a cable body, mineral oxygen-insulated fireproof filling mud is extruded outside the stranded insulated wires, a fire-resistant layer is arranged outside the mineral oxygen-insulated fireproof filling mud, and the sheath is extruded outside the fire-resistant layer. The flexible mineral insulated cable has the advantages of high flexibility, excellent insulating and fire-resisting performance, simple production technology, low cost and long service life.
Description
Technical field
The present invention relates to power cable, particularly a kind of mineral insulated cable and preparation method thereof.
Background technology
Mineral insulated cable (MineralInsulatedCable) is called for short MI cable. Rigidity and flexible two kinds can be divided at present by architectural characteristic. Rigidity mineral insulated cable is 19 imaginations that the end of the century, Switzerland engineer ArnoldFrancoisBorel proposed, and in patented power in 1896,1934-1936 method, English developed quickly after putting into production. China also develops in the sixties in last century, starts for military field, and the mid-80 starts industrialized production, and is progressively accepted by building field comprehensively. The invention of flexible mineral insulation fireproof cable is about being born in Switzerland's Si Tute cable companies at eighties of last century the seventies. Flexible mineral insulation cable is by copper stranded conductor, mineral compound insulation and mineral oxygen barrier fills mud and low-smoke halogen-free polyolefin sheath is constituted. This cable have do not fire, smokeless, nontoxic and fire-resistance property. Due to rigidity mineral insulated cable reliability, produce and lay in defect, quit listing gradually in European and American developed countries, flexible mineral insulation fireproof cable becomes the main flow cable product of fire protection field. Currently used fire-resistant type mineral insulated cable, copper core nickel bag conductor and external insulation, sheath is usually had to constitute, lack flexibility, existing production technology is difficult to ensure that mineral paper glass fiber gasket for packing fills closely knit tight, and exist stranding surrounding extrusion filling mineral matter surface is smooth not and rounding, when dry, easily occur after mineral-filled mud extrusion that slight crack causes the problem that insulation and fireproof performance reduce.
Summary of the invention
The technical problem to be solved is for above-mentioned the deficiencies in the prior art, it is provided that a kind of flexibility is good, good insulating, mineral insulated cable that technique simple production efficiency is high and preparation method thereof.
For solving above-mentioned technical problem, the technical scheme that the present invention takes is:
A kind of flexible mineral insulation cable, including core conductor, insulating barrier and oversheath, one layer of nexine calcining mica insulation band tightly it is coated with outside described core conductor, calcine at nexine and outside mica insulation band, be coated with again one layer of outer layer calcining mica insulation band, the outside calcining mica insulation band at outer layer is extruded with an insulating barrier piece covered wire of composition, the intermediate gaps of multiple covered wires is provided with glass fibre gasket for packing, multiple covered wire twisted synthesizing cables, outside stranded covered wire, it is extruded with the fire prevention of mineral oxygen barrier fills mud, mineral oxygen barrier fire prevention fill mud be provided externally with flame retardant coating, it is extruded with oversheath in the outside of flame retardant coating.
A preferred version as above-mentioned a kind of flexible mineral insulation cable, it is the flexible ceramicization fire-resistant fire prevention mineral-filled mud of oxygen barrier that mud is filled in the fire prevention of described mineral oxygen barrier, described flame retardant coating is glass fibre band, and described oversheath material is low smoke and zero halogen protective cover material.
The preparation method of this flexible mineral insulation cable comprises the steps:
First, at normal temperatures, utilizing continuous annealing copper cash machine drawing to carry out wire drawing and the contact electric resistance annealing of circular copper wire, control annealing speed is 3.5-4.2m/s, and annealing temperature is 530-550 DEG C, obtains monofilament conductor;
Secondly, employing is pressed the stranded multifilament conductor of form and is become a core conductor, the wrapped nexine calcining mica insulation band in outside of online core conductor, and thickness is 0.3-0.5mm, calcining the outside wrapped outer layer calcining mica insulation band of mica insulation band at nexine, thickness is 0.5-0.8mm;
3rd, solid type insulating barrier is extruded with outside extruding machine outside stratus mother insulating tape, constitute a covered wire, covered wire sequentially enters three tank coolings, sequentially enters the tank that water temperature is 80-90 DEG C, the tank of 60-70 DEG C, the tank of 30-40 DEG C cools down, carrying out force air-dried again, air temperature is 30-50 DEG C, then uses take-up take-up;
4th, filled glass fiber gasket for packing in the space in the middle of many covered wires, simultaneously twisted synthesizing cable;
5th, adopting cold pushing manipulation, high pressure is mediated and is shaped mineral oxygen barrier fire prevention filling mud, then at the uniform velocity continuously enters drying unit with the speed of 3-4m/min and solidifies, 3 stages are divided to carry out, the drying tunnel length 1.5-2.5m of first stage drying unit, design temperature 220-260 DEG C, second stage drying tunnel length 4-5m, design temperature 150-180 DEG C, phase III drying tunnel length 8-11m, design temperature 100-150 DEG C, the wrapped glass fibre band of tail end at drying tunnel mouth;
6th, utilize extruding machine to extrude oversheath.
The invention have the benefit that core conductor is formed by multifilament conductor strand and many covered wire twisted synthesizing cables, improve the pliability of cable, entirety degree; Nexine calcining mica insulation band and outer layer calcining mica insulation band ensure that seriality and the reliability of mica insulation layer, prevent the disconnection bending the calcining mica insulation band that disturbance causes when cable construction and imperfect, improve cable fire temperature and fire-protection rating; Covered wire sequentially enters three tank coolings, and rate of cooling is fast, effective, and surface quality is high; Filled glass fiber gasket for packing twisted synthesizing cable simultaneously in space in the middle of many covered wires, it is ensured that the roundness of cable, prevent again the mutual abrasion between covered wire, increase the service life; The mineral-filled mud of flexible ceramicization fire-resistant fire prevention oxygen barrier solidifies in three stages, first stage fast setting surface molding, second stage heat preservation solidification, go deep into internal layer, phase III progressively lowers the temperature, variations in temperature is steady, and hardening time is long, it is easy to form cellular fine holes, and prevent slight crack, can playing good fire insulation effect of heat insulation and have pliability, bending radius is little, oxygen barrier of preventing fires.
Accompanying drawing explanation
Fig. 1 is the structural representation adopting a kind of flexible mineral insulation cable manufactured by the present invention.
Wherein, 1: core conductor; 2: nexine calcining mica insulation band; 3: outer layer calcining mica insulation band; 4: glass fibre gasket for packing; 5: insulating barrier; 6: mud is filled in the fire prevention of mineral oxygen barrier; 7: flame retardant coating; 8: oversheath.
Detailed description of the invention
Below in conjunction with drawings and Examples, a kind of flexible mineral insulation cable of the present invention and preparation method thereof is described in further detail.
As shown in Figure 1, a kind of flexible mineral insulation cable, including core conductor 1, insulating barrier 5 and oversheath 8, one layer of nexine calcining mica insulation band 2 of the outside tightly cladding of described core conductor 1, calcine at nexine and outside mica insulation band 2, be coated with again one layer of outer layer calcining mica insulation band 3, outer layer calcine mica insulation with 3 outside be extruded with insulating barrier 5 and constitute a covered wire, the intermediate gaps of multiple covered wires is provided with glass fibre gasket for packing 4, multiple covered wire twisted synthesizing cables, outside stranded covered wire, it is extruded with the fire prevention of mineral oxygen barrier fills mud 6, mineral oxygen barrier fire prevention fill mud 6 be provided externally with flame retardant coating 7, it is extruded with oversheath 8 in the outside of flame retardant coating 7.
Another kind as a kind of flexible mineral insulation cable of the present invention improves embodiment, it is the flexible ceramicization fire-resistant fire prevention mineral-filled mud of oxygen barrier that mud 6 is filled in the fire prevention of described mineral oxygen barrier, described flame retardant coating 7 is glass fibre band, and described oversheath 8 material is low smoke and zero halogen protective cover material.
The preparation method of this flexible mineral insulation cable comprises the steps:
First, at normal temperatures, continuous annealing copper cash machine drawing is utilized to carry out wire drawing and the contact electric resistance annealing of circular copper wire, control annealing speed is 3.5-4.2m/s, and annealing temperature is 530-550 DEG C, after annealing, coolant water temperature is 25-40 DEG C, obtains monofilament conductor, surface requirements rounding, bright and clean, without agnail;
Secondly, employing is pressed the stranded multifilament conductor of form and is become a core conductor 1, the wrapped nexine calcining mica insulation band 2 in outside of online core conductor 1, thickness is 0.3-0.5mm, the outside wrapped outer layer calcining mica insulation band 3 of mica insulation band 2 is calcined at nexine, thickness is 0.5-0.8mm, and wrapped complete mica insulation band ensure that seriality and the reliability of mica insulation layer at twice, improves cable fire temperature and fire-protection rating;
3rd, extruding solid type insulating barrier 5 with extruding machine stratus mother insulating tape 3 outside is outside, constitute a covered wire, covered wire sequentially enters three tank coolings, sequentially enter the tank that water temperature is 80-90 DEG C, the tank of 60-70 DEG C, the tank of 30-40 DEG C cools down, and rate of cooling is fast, effective, carrying out force air-dried subsequently, air temperature is 30-50 DEG C, then uses take-up take-up;
4th, filled glass fiber gasket for packing 4 in the space in the middle of many covered wires, simultaneously twisted synthesizing cable;
5th, adopt cold pushing manipulation, high pressure is mediated and is shaped mineral oxygen barrier fire prevention filling mud 6, then at the uniform velocity continuously enter drying unit with the speed of 3-4m/min to solidify, 3 stages are divided to carry out, the drying tunnel length 1.5-2.5m of first stage drying unit, design temperature 220-260 DEG C, fast setting surface molding, second stage drying tunnel length 4-5m, design temperature 150-180 DEG C, heat preservation solidification, go deep into internal layer, phase III drying tunnel length 8-11m, design temperature 100-150 DEG C, progressively lower the temperature, form continuous crackless cellular fine holes structure, the wrapped glass fibre band of tail end at drying tunnel mouth,
6th, utilize extruding machine to extrude oversheath 8.
The every test index of flexible mineral insulation cable that the present embodiment obtains is: minimum bending radius is cable size 10 times of cable; Cable transmits 0.6/1kV alternating current pressure energy stable operation 3.5 hours under 1200 DEG C of thermal-flames, and cable is not short-circuit, open circuit; Insulation Material specific insulation >=1 �� 1014 �� m; Dielectric strength >=25MV/m.
Claims (3)
1. a flexible mineral insulation cable, including core conductor, insulating barrier and oversheath, it is characterized in that: outside described core conductor, be tightly coated with one layer of nexine calcining mica insulation band, calcine at nexine and outside mica insulation band, be coated with again one layer of outer layer calcining mica insulation band, the outside calcining mica insulation band at outer layer is extruded with an insulating barrier piece covered wire of composition, the intermediate gaps of multiple covered wires is provided with glass fibre gasket for packing, multiple covered wire twisted synthesizing cables, outside stranded covered wire, it is extruded with the fire prevention of mineral oxygen barrier fills mud, mineral oxygen barrier fire prevention fill mud be provided externally with flame retardant coating, it is extruded with oversheath in the outside of flame retardant coating.
2. a kind of flexible mineral insulation cable according to claim 1, it is characterized in that: it is the flexible ceramicization fire-resistant fire prevention mineral-filled mud of oxygen barrier that mud is filled in the fire prevention of described mineral oxygen barrier, described flame retardant coating is glass fibre band, and described oversheath material is low smoke and zero halogen protective cover material.
3. the preparation method of a flexible mineral insulation cable, it is characterised in that: described preparation method comprises the steps:
First, at normal temperatures, utilizing continuous annealing copper cash machine drawing to carry out wire drawing and the contact electric resistance annealing of circular copper wire, control annealing speed is 3.5-4.2m/s, and annealing temperature is 530-550 DEG C, obtains monofilament conductor;
Secondly, employing is pressed the stranded multifilament conductor of form and is become a core conductor, the wrapped nexine calcining mica insulation band in outside of online core conductor, and thickness is 0.3-0.5mm, calcining the outside wrapped outer layer calcining mica insulation band of mica insulation band at nexine, thickness is 0.5-0.8mm;
3rd, solid type insulating barrier is extruded with outside extruding machine outside stratus mother insulating tape, constitute a covered wire, covered wire sequentially enters three tank coolings, sequentially enters the tank that water temperature is 80-90 DEG C, the tank of 60-70 DEG C, the tank of 30-40 DEG C cools down, carrying out force air-dried again, air temperature is 30-50 DEG C, then uses take-up take-up;
4th, filled glass fiber gasket for packing in the space in the middle of many covered wires, simultaneously twisted synthesizing cable;
5th, adopting cold pushing manipulation, high pressure is mediated and is shaped mineral oxygen barrier fire prevention filling mud, then at the uniform velocity continuously enters drying unit with the speed of 3-4m/min and solidifies, 3 stages are divided to carry out, the drying tunnel length 1.5-2.5m of first stage drying unit, design temperature 220-260 DEG C, second stage drying tunnel length 4-5m, design temperature 150-180 DEG C, phase III drying tunnel length 8-11m, design temperature 100-150 DEG C, the wrapped glass fibre band of tail end at drying tunnel mouth;
6th, utilize extruding machine to extrude oversheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199743.5A CN105655011A (en) | 2016-04-01 | 2016-04-01 | Flexible mineral insulated cable and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199743.5A CN105655011A (en) | 2016-04-01 | 2016-04-01 | Flexible mineral insulated cable and production method thereof |
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| CN105655011A true CN105655011A (en) | 2016-06-08 |
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| CN201610199743.5A Pending CN105655011A (en) | 2016-04-01 | 2016-04-01 | Flexible mineral insulated cable and production method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024166A (en) * | 2016-08-08 | 2016-10-12 | 江苏亨通电力电缆有限公司 | Flexible mineral insulation fireproof cable |
| CN109671521A (en) * | 2019-01-17 | 2019-04-23 | 四川兴川泰线缆有限公司 | A kind of mineral-insulated fireproof control cable |
| CN110010273A (en) * | 2019-05-18 | 2019-07-12 | 李强 | Flexible fire-proof cable |
| CN110415866A (en) * | 2019-08-21 | 2019-11-05 | 江苏亨通电力电缆有限公司 | A kind of mica tape mineral insulated cable and its manufacturing process |
| CN114596998A (en) * | 2022-03-14 | 2022-06-07 | 金龙电缆科技有限公司 | Preparation method of high-flame-retardant fireproof cable |
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|---|---|---|---|---|
| US5936205A (en) * | 1994-11-10 | 1999-08-10 | Alcatel | Communication cable for use in a plenum |
| US20020117325A1 (en) * | 2001-02-23 | 2002-08-29 | Mennone Michael P. | Flame resistant cable structure |
| CN102394126A (en) * | 2011-10-24 | 2012-03-28 | 中特华星电缆股份有限公司 | Low-smoke halogen-free high-flame-retardant fire-resistant environmentally-friendly cable |
| CN202422824U (en) * | 2012-02-16 | 2012-09-05 | 沈阳鹏程电缆有限公司 | Fireproof low-voltage cable |
| CN203102899U (en) * | 2013-01-29 | 2013-07-31 | 宏胜电线电缆有限公司 | Mineral-insulated fireproof cable |
| CN204215774U (en) * | 2014-10-11 | 2015-03-18 | 安徽明星电缆有限公司 | A kind of offshore platform emergent instrument cable of new type explosion proof fire prevention |
-
2016
- 2016-04-01 CN CN201610199743.5A patent/CN105655011A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5936205A (en) * | 1994-11-10 | 1999-08-10 | Alcatel | Communication cable for use in a plenum |
| US20020117325A1 (en) * | 2001-02-23 | 2002-08-29 | Mennone Michael P. | Flame resistant cable structure |
| CN102394126A (en) * | 2011-10-24 | 2012-03-28 | 中特华星电缆股份有限公司 | Low-smoke halogen-free high-flame-retardant fire-resistant environmentally-friendly cable |
| CN202422824U (en) * | 2012-02-16 | 2012-09-05 | 沈阳鹏程电缆有限公司 | Fireproof low-voltage cable |
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| CN204215774U (en) * | 2014-10-11 | 2015-03-18 | 安徽明星电缆有限公司 | A kind of offshore platform emergent instrument cable of new type explosion proof fire prevention |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024166A (en) * | 2016-08-08 | 2016-10-12 | 江苏亨通电力电缆有限公司 | Flexible mineral insulation fireproof cable |
| CN109671521A (en) * | 2019-01-17 | 2019-04-23 | 四川兴川泰线缆有限公司 | A kind of mineral-insulated fireproof control cable |
| CN110010273A (en) * | 2019-05-18 | 2019-07-12 | 李强 | Flexible fire-proof cable |
| CN110415866A (en) * | 2019-08-21 | 2019-11-05 | 江苏亨通电力电缆有限公司 | A kind of mica tape mineral insulated cable and its manufacturing process |
| CN114596998A (en) * | 2022-03-14 | 2022-06-07 | 金龙电缆科技有限公司 | Preparation method of high-flame-retardant fireproof cable |
| CN114596998B (en) * | 2022-03-14 | 2023-12-29 | 金龙电缆科技有限公司 | Preparation method of high-flame-retardance fireproof cable |
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Application publication date: 20160608 |