CN111667944A - Water-blocking fireproof special cable - Google Patents
Water-blocking fireproof special cable Download PDFInfo
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- CN111667944A CN111667944A CN202010599476.7A CN202010599476A CN111667944A CN 111667944 A CN111667944 A CN 111667944A CN 202010599476 A CN202010599476 A CN 202010599476A CN 111667944 A CN111667944 A CN 111667944A
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- water
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- blocking
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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
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
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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
- H01B7/0216—Two layers
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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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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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
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/226—Helicoidally wound metal wires or tapes
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
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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
- 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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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a water-blocking fireproof special cable which comprises a plurality of wire cores, wherein each wire core comprises a copper core, a first insulating layer and a second insulating layer, the first insulating layer and the second insulating layer are sequentially coated outside the copper core, the copper core is formed by stranding a plurality of copper conductors with corrugated sections, a ceramic wrapping tape, a first protective layer, a second protective layer, a steel tape armoring layer and a protective sleeve are sequentially arranged outside the stranded wire cores, and a water-blocking rope is filled between each wire core and the ceramic wrapping tape. The cable has the advantages of simple structure and reasonable design, and the arrangement of the double-layer insulating layer and the double-layer protective layer ensures that the cable achieves better water-blocking and fireproof effects, ensures the high conductivity of the cable under the condition of higher stability, and reduces the potential safety hazard of the cable in use.
Description
Technical Field
The invention belongs to the technical field of special cables, and particularly relates to a waterproof fireproof special cable.
Background
At present, common cables on the market generally resist high temperature of 90 ℃ and do not have the characteristic of water resistance, and under the environment with much moisture or rainwater, the conductors and the insulation of the cables can be influenced after moisture is soaked in the cables. As for the conductor, the cable is in a thermal stable state when in normal operation, the temperature of the conductor is generally above 60 ℃, if moisture is soaked, the conductor is oxidized, the contact resistance between the single wires in the conductor is increased, the resistance of the conductor is increased, the energy loss of a power transmission line is increased, and even potential safety hazards are generated. With the continuous development and progress of the society, the requirements of special fields such as aerospace, rail transit, petrochemical industry and the like on cables are higher and higher, and the cables are required to have good water resistance while ensuring the fireproof performance. Therefore, we propose a special cable with good water resistance and good fire resistance.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a water-blocking fireproof special cable, which has good fireproof performance and water-blocking performance, and simultaneously has impact resistance and anti-interference capability, aiming at the defects of the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a fire prevention special type cable blocks water, includes several sinle silks, the sinle silk includes the copper core and wraps first insulating layer and second insulating layer outside the copper core in proper order, the copper core is the transposition of many copper conductors of corrugated shape by the cross-section and constitutes, and several sinle silks after the transposition are equipped with pottery outward in proper order and change band, first protective layer, second protective layer, steel band armor and sheath, it has the rope that blocks water still to fill between sinle silk and the pottery band, first protective layer separates oxygen mud for the flexible pottery fire-resistant mineral substance of pottery armour to through extruding the cladding at pottery band outer wall, the second protective layer is silicon rubber glass fiber protection heat insulating tape to through wrapping the winding outside first protective layer.
Preferably, the water-blocking powder is sprayed in the gaps of the copper core formed by twisting a plurality of copper conductors.
Preferably, the thickness of the first protective layer is 2mm, and the thickness of the second protective layer is 0.2 mm.
Preferably, the first insulating layer is fluoroplastic and is coated on the outer wall of the copper core through extrusion, and the second insulating layer is a ceramic halogen-free low-smoke polyolefin flame-retardant fire-resistant insulating material and is coated on the outer wall of the first insulating layer through extrusion.
Preferably, the steel tape armor layer is a double non-magnetic stainless steel tape and is wrapped on the outer wall of the second protective layer by wrapping.
Preferably, the sheath is made of ceramic halogen-free low-smoke polyolefin flame-retardant refractory material.
The invention has the beneficial effects that:
(1) the copper core is formed by twisting the corrugated copper conductors, so that the tightness among the copper conductors is effectively improved, the volume of the copper core is reduced, meanwhile, the gaps among the copper conductors are smaller, the oxidation of air on the copper conductors is reduced, the high conductivity of the copper core is ensured, and the water blocking powder is added into the twisting gaps of the copper core, so that the water blocking performance of the copper core is effectively improved;
(2) the first insulating layer is made of fluoroplastic, and can transmit larger allowable current under the condition of conductors with the same cross section, so that the high conductivity of the wire core is ensured while the excellent insulating property is achieved;
(3) the second insulating layer is made of ceramic halogen-free low-smoke polyolefin flame-retardant and fire-resistant insulating materials, and has excellent flame retardance and fire resistance, and horizontal combustion can be carried out without delayed combustion, so that the insulating, water-blocking and fire-proof effects of the wire core are improved;
(4) a water blocking rope is filled between the twisted wire core and the ceramic wrapping belt, so that the water blocking performance of the cable is further improved;
(5) by adopting the ceramic armor flexible ceramic fireproof mineral substance oxygen-insulating mud as the first protective layer, which is an inorganic composite mineral substance oxide oxygen-insulating filling material, the flexibility of the cable can be increased, the bending radius can be reduced, the cable can be prevented from cracking in the production and use processes, and the ceramic cable can be gradually ceramic after combustion, and has the advantages of no sticking, no smoke, no harmful gas, fire prevention, fire resistance and the like;
(6) the silicon rubber glass fiber protective heat insulation belt is used as a second protective layer, and the effects of heat insulation protection and heat preservation are mainly achieved;
(7) the steel tape armor layer is wrapped by double non-magnetic stainless steel tapes, so that the impact resistance and the anti-interference performance of the cable can be enhanced;
(8) the sheath is made of ceramic halogen-free low-smoke polyolefin flame-retardant refractory material, the mechanical property and the high and low temperature resistance of the sheath are high, the bending breaking strength of the armor body after ablation can reach 5-8MPa, and the sheath can be continuously produced indefinitely long without seams.
The cable has the advantages of simple structure and reasonable design, and the arrangement of the double-layer insulating layer and the double-layer protective layer ensures that the cable achieves better water-blocking and fireproof effects, ensures the high conductivity of the cable under the condition of higher stability, and reduces the potential safety hazard of the cable in use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a core of the present invention;
fig. 3 is an enlarged view of a portion of the copper core of the present invention.
In the figure: 1. a wire core; 2. a copper core; 3. a first insulating layer; 4. a second insulating layer; 5. ceramic wrapping belts; 6. a first protective layer; 7. a second protective layer; 8. a steel tape armor layer; 9. a sheath; 10. a water-blocking rope; 11. water-blocking powder.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific embodiments.
Examples
As shown in fig. 1, fig. 2 and fig. 3, the water-blocking fireproof special cable provided in this embodiment includes a plurality of wire cores 1, where the wire cores 1 include a copper core 2, and a first insulating layer 3 and a second insulating layer 4 sequentially covering the copper core 2, the copper core 2 is formed by twisting a plurality of copper conductors with corrugated cross sections, a gap of the twisted copper core 2 is sprayed with a water-blocking powder 11, the water-blocking powder 11 may be sprayed and filled in the gap of the copper core 2 by using an electrostatic spraying device, or silicone oil may be applied to the surface of the copper conductor before twisting, and then the copper conductor coated with the silicone oil passes through a box of the water-blocking powder 11, so that the water-blocking powder 11 is adhered and then twisted;
the copper core 2 is formed by twisting corrugated copper conductors, so that the twisting gap can be reduced, the water blocking powder 11 is added into the copper core 2, and the water blocking tape is wrapped outside the copper core 2, so that the water blocking performance of the copper core 2 is effectively improved;
meanwhile, the copper core 2 is provided with a double-layer insulating layer, the fluoroplastic is coated on the outer wall of the wire core 1 through extrusion, the fluoroplastic is used as the first insulating layer 3, the fluoroplastic cable has strong thermal stability, and the fluoroplastic cable can transmit larger allowable current under the condition of the same section conductor; the ceramic halogen-free low-smoke polyolefin flame-retardant fireproof insulating material is extruded and coated outside the first insulating layer 3 to serve as a second insulating layer 4, has excellent flame retardance and fireproof performance, can be self-extinguished without delayed combustion under the condition of horizontal combustion, is flamed at 1600 ℃ of 350-;
a ceramic wrapping tape 5, a first protective layer 6, a second protective layer 7, a steel tape armor layer 8 and a sheath 9 are sequentially arranged outside the stranded wire cores 1, and a water blocking rope 10 is filled between the wire cores 1 and the ceramic wrapping tape 5;
the water blocking rope 10 can fill the gap between the wire core 1 and the wrapping tape, so that the gap after the wire core 1 is twisted is reduced, the air content in the gap is reduced, and the water blocking rope 10 is selected as the filler, so that the water blocking performance of the cable is further improved, and water is effectively prevented from entering the wire core 1;
the first protective layer 6 is formed by extruding ceramic-armored flexible ceramic fireproof mineral oxygen-insulating mud, the thickness of the first protective layer is controlled to be 2mm, the second protective layer 7 is formed by wrapping a silicon rubber glass fiber protective heat-insulating tape, and the thickness of the second protective layer is controlled to be 0.2 mm; adopts the double-layer protection design of the ceramic armor flexible ceramic fireproof refractory mineral matter oxygen-insulating mud and the silicon rubber glass fiber protection heat-insulating belt, wherein the ceramic armor flexible ceramic fireproof refractory mineral oxygen-insulating mud has excellent ceramic forming property, and can be used for preparing a ceramic material at a high temperature of more than 450 ℃ or under flame, can be rapidly sintered into a complete ceramic body, and the ceramic body keeps good bending strength when meeting water and can not be pulverized, meanwhile, the sintering speed is high, the ceramic body does not deform, crack or drip in the process of ceramic formation, the ceramic body has a microporous structure and has good effects of fire resistance, oxygen isolation and heat insulation, the silicon rubber glass fiber protective heat-insulating belt mainly plays the roles of heat insulation, protection and heat preservation, so the silicon rubber glass fiber protective heat-insulating belt is used as an outer protective layer, the protective function of heat insulation and heat preservation is achieved under the general condition, and if the second protective layer 7 is damaged during combustion, ceramic protection can be performed through the first protective layer 6; the ceramic-armored flexible ceramic fireproof refractory mineral substance oxygen-isolating mud is used as the first protective layer 6, has good flexibility, can reduce the bending radius of the cable, and cannot crack in the processing and using processes;
the steel belt armor layer 8 is a double non-magnetic stainless steel belt and wraps the outer wall of the second protective layer 7 in a wrapping mode, so that the overall impact resistance and the anti-interference performance of the cable can be enhanced;
the sheath 9 is made of ceramic halogen-free low-smoke polyolefin flame-retardant refractory material, has good mechanical property, and the bending breaking strength of the ablated armor can reach about 5-8 MPa; the fire-resistant and flame-retardant inorganic ceramic armor has high and low temperature resistance, has the characteristics of common halogen-free low-smoke polyolefin fire-resistant and flame-retardant fuel at the temperature of-55-95 ℃, and the high temperature resistance of the sintered inorganic ceramic armor can reach 2000 ℃; the smoke-free environment-friendly cigarette also has excellent safety and environmental protection, does not delay combustion and drip, has the smoke toxicity reaching ZA1 level, does not cause secondary damage to human bodies, and has the smoke density and the light transmittance of over 80 percent; meanwhile, the bending radius of the aluminum alloy sheath is smaller than that of the aluminum alloy sheath 9, the aluminum alloy sheath is easy and convenient to lay, and can be continuously produced infinitely long without seams.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (6)
1. The utility model provides a fire prevention special type cable blocks water which characterized in that: comprises a plurality of wire cores (1), wherein each wire core (1) comprises a copper core (2), a first insulating layer (3) and a second insulating layer (4) which are sequentially coated outside the copper core (2), the copper core (2) is formed by twisting a plurality of copper conductors with corrugated sections, a ceramic wrapping tape (5), a first protective layer (6), a second protective layer (7), a steel strip armor layer (8) and a sheath (9) are sequentially arranged outside the twisted plurality of wire cores (1), a water-blocking rope (10) is filled between the wire core (1) and the ceramic wrapping belt (5), the first protective layer (6) is ceramic-armored flexible ceramic fireproof refractory mineral oxygen-insulating mud, the second protective layer (7) is a silicon rubber glass fiber protective heat insulation tape and is wound outside the first protective layer (6) by wrapping.
2. A water-blocking fire-proof special cable as claimed in claim 1, wherein: water-blocking powder (11) is sprayed in gaps of a copper core (2) formed by twisting a plurality of copper conductors.
3. A water-blocking fire-proof special cable as claimed in claim 1 or 2, wherein: the thickness of the first protective layer (6) is 2mm, and the thickness of the second protective layer (7) is 0.2 mm.
4. A water-blocking fire-proof special cable as claimed in claim 1, wherein: the first insulating layer (3) is fluoroplastic, and is wrapped on the outer wall of the copper core (2) through extrusion, and the second insulating layer (4) is a ceramic halogen-free low-smoke polyolefin flame-retardant fire-resistant insulating material and is wrapped on the outer wall of the first insulating layer (3) through extrusion.
5. A water-blocking fire-proof special cable as claimed in claim 1, wherein: the steel belt armor layer (8) is a double non-magnetic stainless steel belt and is wrapped on the outer wall of the second protective layer (7) through wrapping.
6. A water-blocking fire-proof special cable as claimed in claim 1, wherein: the sheath (9) is made of ceramic halogen-free low-smoke polyolefin flame-retardant refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599476.7A CN111667944A (en) | 2020-06-28 | 2020-06-28 | Water-blocking fireproof special cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599476.7A CN111667944A (en) | 2020-06-28 | 2020-06-28 | Water-blocking fireproof special cable |
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| Publication Number | Publication Date |
|---|---|
| CN111667944A true CN111667944A (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010599476.7A Pending CN111667944A (en) | 2020-06-28 | 2020-06-28 | Water-blocking fireproof special cable |
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| CN (1) | CN111667944A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866913A (en) * | 2021-08-30 | 2021-12-31 | 通鼎互联信息股份有限公司 | High-temperature-resistant water-blocking optical cable |
-
2020
- 2020-06-28 CN CN202010599476.7A patent/CN111667944A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866913A (en) * | 2021-08-30 | 2021-12-31 | 通鼎互联信息股份有限公司 | High-temperature-resistant water-blocking optical cable |
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