CN218729994U - Steel-cored aluminum conductor interlocking armored building fireproof cable - Google Patents
Steel-cored aluminum conductor interlocking armored building fireproof cable Download PDFInfo
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- CN218729994U CN218729994U CN202222604901.4U CN202222604901U CN218729994U CN 218729994 U CN218729994 U CN 218729994U CN 202222604901 U CN202222604901 U CN 202222604901U CN 218729994 U CN218729994 U CN 218729994U
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Abstract
A steel-cored aluminum conductor interlocked armored building fireproof cable is formed by sequentially wrapping a first wrapping layer, an inner sheath, an armor layer, a second wrapping layer and an outer sheath outside a cable core; the cable core is formed by a wire core and filling stranding; the wire core is formed by extruding an insulating layer outside the conductor; the conductor comprises a steel monofilament and a plurality of aluminum monofilaments; the steel monofilaments are arranged at the axial position of the conductor, a plurality of aluminum monofilaments are stranded layer by layer, the stranding directions of the aluminum monofilaments of adjacent layers are opposite, and the stranding direction of the outermost layer is the right direction; the insulating layer is made of crosslinked polyethylene insulating material; the filling is made of non-hygroscopic filling material; the inner sheath is formed by extruding and wrapping halogen-free low-smoke polyolefin sheath material; the armor layer is of an aluminum alloy interlocking armor structure; the outer sheath is formed by extruding halogen-free low-smoke flame-retardant polyolefin sheath material. The first lapping layer is formed by lapping and overlapping glass fiber tapes. The second is around covering by the overlapping of the fire-retardant area of halogen-free low smoke around the package and is constituteed. The aluminum conductor of this cable reduce cost, and the steel core improves structural strength, satisfies multiple building and lays the demand.
Description
Technical Field
The utility model is suitable for a steel-cored aluminum conductor interlocking armor type building fireproof cable of rated voltage 0.6/1kV belongs to cable technical field.
Background
Power transmission cables used in buildings are mainly power transmission and carrier waves in view of their functions. The cable with the carrier communication function has high requirements on conductors and shielding of the cable, for example, the conductors need to be made of copper materials, and a shielding layer needs to be arranged in the cable. For cables only used for power transmission, the designs are not necessary, performance redundancy is achieved, and cost performance is not high. Meanwhile, the copper material has low mechanical properties such as tensile strength and the like, and the conductor needs to be specially designed according to the wire diameter and the twisted structure of a copper monofilament and the twisted structure of a cable core in the traditional cable design used in a building, so that the tensile strength of the cable can meet the use requirement. In addition, power transmission cables used in buildings are required to have good fire resistance.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
To steel core aluminum conductor interlocking armor type building fireproof cable's product demand, the utility model discloses the problem that the cable need be solved mainly has:
the requirements of the steel-cored aluminum conductor interlocked armored type building fireproof cable are determined by combining the existing GB/T31247 and GB/T1179 and the industrial requirements, and aiming at the requirements, the steel-cored aluminum conductor interlocked armored type building fireproof cable has the performances of fire resistance, tensile resistance, compression resistance, impact resistance and the like on the basis of meeting the electrical property and the mechanical property of the cable.
Technical scheme adopted for solving the technical problems
A steel-cored aluminum conductor interlocked armored building fireproof cable structurally comprises a conductor, an insulating layer and a plurality of wire cores, wherein the conductor is wrapped by the insulating layer to form the wire cores, and the wire cores and the filling and twisting form a cable core, and the steel-cored aluminum conductor interlocked armored building fireproof cable is characterized in that the stranding pitch diameter ratio of the cable core is 30-40 times;
the conductor comprises a steel monofilament and a plurality of aluminum monofilaments; the steel monofilaments are arranged at the axial position of the conductor, a plurality of aluminum monofilaments are stranded layer by layer, the stranding directions of the aluminum monofilaments of adjacent layers are opposite, and the stranding direction of the outermost layer is the right direction; the sum of the cross-sectional areas of all the aluminum filaments is 10mm 2 ～400mm 2 The cross-sectional area of the steel monofilament is 10mm 2 ～400mm 2 (ii) a The diameter of the steel monofilament is 1.50 mm-4.61 mm; the diameter of the aluminum monofilament is 1.50 mm-4.72 mm; the diameter of the conductor is 4.5 mm-28.0 mm;
the insulating layer is made of crosslinked polyethylene insulating material, and the nominal thickness of the insulating layer is 0.7 mm-2.0 mm;
the filling is made of a non-hygroscopic filling material;
the cable core is sequentially wrapped with an inner sheath, an armor layer and an outer sheath from inside to outside;
the inner sheath is formed by extruding and wrapping a halogen-free low-smoke polyolefin sheath material, the thickness of the inner sheath is within the range of 1.0-1.8 mm of the nominal thickness of the inner sheath, and the thinnest thickness of the inner sheath is not less than 80-0.2 mm of the nominal thickness;
the armor layer is of an aluminum alloy interlocking armor structure;
the outer sheath is formed by extruding halogen-free low-smoke flame-retardant polyolefin sheath materials, the nominal thickness of the outer sheath is 1.8-3.7 mm, and the thinnest thickness of the outer sheath is not less than 80-0.2 mm of the nominal thickness.
This cable adopts steel + aluminium mixed conductor for improve the tensile property of cable. Meanwhile, the fire-retardant sheath material, the aluminum alloy interlocking armor structure and the like are adopted, so that the fire resistance of the cable is improved.
Meanwhile, in order to avoid that higher harmonics possibly contained in the conductor during power transmission can generate electromagnetic interference on the periphery and that the external electromagnetic interference is coupled to the conductor to influence equipment for connecting the cable, the aluminum alloy interlocking armor structure can also play a role in metal shielding. Meanwhile, the aluminum alloy interlocking armor structure is also beneficial to the tensile property of the cable. The aluminum alloy interlocking armor structure can also avoid the damage or breakdown of the insulating layer caused by overvoltage generated under the action of lightning current electromagnetic effect.
Other structural designs of the cable are designed to enable the performance of the cable to meet the use requirement under the specific conductor structure and the aluminum alloy interlocking armor structure.
Further:
a first wrapping layer is further wrapped between the cable core and the inner sheath; the first lapping layer is formed by overlapping and lapping glass fiber tapes, and the average lapping rate of the overlapping and lapping is not less than 15%. The rounding and the compaction of the cable core are ensured.
A second wrapping layer is wrapped between the armor layer and the outer sheath; the second is overlapped around the covering and is constituted by the overlapping of the low smoke fire-retardant area of steamed, overlaps to take the percentage of covering on average not less than 15% around the covering, improves cable low smoke and zero halogen fire behaviour, still avoids the armor of metal material to bring the damage to the sheath of polyolefin material simultaneously. And the inner side of the inner sheath is also provided with a first wrapping layer, so that the insulating layer of the cable core can be prevented from being damaged by the armor layer.
Advantageous effects
After the technical scheme is adopted, the utility model discloses following beneficial effect has:
(1) The cable structure adopts steel + aluminium structure, and aluminium conductor low price, but intensity is lower, increases a steel core in the middle of the conductor, and effectual conductor strength of having strengthened satisfies the various demands of laying in the building field.
Meanwhile, the cable adopts the interlocking armor layer, the tensile performance, the fireproof performance, the shielding effect and the like of the cable are improved, the wiring safety is improved, meanwhile, the cable is adopted to replace a wiring calandria from the armor layer, and the installation and construction cost is effectively saved.
(2) The cable adopts steel-cored aluminum conductors and an interlocking armor structure, so that the cable has excellent tensile, compression and impact resistance.
(3) The utility model discloses the cable has used high-quality low smoke and zero halogen fire-retardant environmental protection material simultaneously on the basis of new design cable shape structure, has further satisfied building engineering's fire prevention safety demand.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: conductor 1, insulating layer 2, packing 3, first around covering 4, inner sheath 5, armor 6, second around covering 7, oversheath 8.
Detailed Description
The present disclosure is further described with reference to the following drawings and detailed description:
referring to fig. 1, a steel-cored aluminum conductor interlocking armored type building fireproof cable has the following structure: the cable is formed by sequentially wrapping a first wrapping layer 4, an inner sheath 5, an armor layer 6, a second wrapping layer 7 and an outer sheath 8 outside a cable core;
the cable core is formed by twisting the wire core and the filling 3, and the stranding twisting pitch-diameter ratio is 30-40 times;
the wire core is formed by extruding an insulating layer 2 outside a conductor 1;
the conductor comprises a steel monofilament and a plurality of aluminum monofilaments; the steel monofilaments are arranged at the axial position of the conductor, a plurality of aluminum monofilaments are stranded layer by layer, the stranding directions of the aluminum monofilaments of adjacent layers are opposite, and the stranding direction of the outermost layer is the right direction; the sum of the cross-sectional areas of all the aluminum filaments is 10mm 2 ～400mm 2 The cross section of the steel monofilament is 10mm 2 ～400mm 2 (ii) a The diameter of the steel monofilament is 1.50 mm-4.61 mm; the diameter of the aluminum monofilament is 1.50 mm-4.72 mm; guide tubeThe diameter of the body is 4.5 mm-28.0 mm;
the insulating layer is made of crosslinked polyethylene insulating material, and the nominal thickness of the insulating layer is 0.7 mm-2.0 mm;
the filling is made of a non-hygroscopic filling material;
the inner sheath is formed by extruding and wrapping a halogen-free low-smoke polyolefin sheath material, the thickness of the inner sheath is within the range of 1.0-1.8 mm of the nominal thickness of the inner sheath, and the thinnest thickness of the inner sheath is not less than 80-0.2 mm of the nominal thickness;
the armor layer is of an aluminum alloy interlocking armor structure;
the outer sheath is formed by extruding halogen-free low-smoke flame-retardant polyolefin sheath materials, the nominal thickness of the outer sheath is 1.8-3.7 mm, and the thinnest thickness of the outer sheath is not less than 80-0.2 mm of the nominal thickness.
The first lapping layer is formed by overlapping and lapping glass fiber tapes, and the average lapping rate of the overlapping and lapping is not less than 15%. The second is lapped by overlapping by the fire-retardant area of halogen-free low smoke and is formed, overlaps to lap and takes the percentage of covering not less than 15% on average.
This cable adopts aluminium conductor reduce cost, strengthens conductor intensity with the steel core, satisfies multiple building and lays the demand.
In the present example, a cable with a rated voltage of 0.6/1kV is taken as an example, and in the cable:
the nominal cross-sectional area of the steel filaments in the conductor is 10mm 2 All the aluminum filaments have a nominal cross-sectional area of 70mm 2 The diameter of the steel monofilament is 3.80mm; the diameter of the aluminum monofilament is 3.80mm; the diameter of the conductor is 11.4mm;
the non-hygroscopic filling material is a glass fiber rope, and the filling coefficient is 1.6.
The nominal thickness of the glass fiber tape in the first wrapping layer is 0.2mm.
In the aluminum alloy interlocking armor structure of the armor layer, the nominal thickness of the aluminum alloy belt is 0.5 mm-0.65 mm, and the width of the aluminum alloy belt is 9.5 mm-19.0 mm.
The nominal thickness of the halogen-free low-smoke flame-retardant belt of the second wrapping layer is 0.2mm.
The nominal thickness of the insulating layer is 1.1mm, and the crosslinked polyethylene insulating material is a common insulating material and has no special requirement.
The model/brand of the sheathing material of the inner sheath is HW495-2, and the nominal thickness of the inner sheath is 1.2mm.
The aluminum alloy interlocking armor structure of the armor layer improves wiring safety. In the wiring construction process, the armor layer can also replace a wiring calandria, so that the installation and construction cost is saved.
The type/brand of the sheathing material of oversheath is WH-4, and the nominal thickness of oversheath is 2.1mm.
The performance data of the cable is as follows, and the conclusion is that the cable is qualified. The method specifically comprises the following steps:
1. fire-proof performance
The flame spread FS is less than or equal to 1.5m;
the heat release rate peak value HRR peak value is less than or equal to 30KW;
the total heat release THR1200 in the fire 1200s is less than or equal to 15MJ;
the burning growth rate index FIGRA is less than or equal to 150W/S;
the peak value SPR peak value of the smoke production rate is less than or equal to 0.25m2/s;
the total smoke production TSP1200 in the fire 1200s is less than or equal to 50m < 2 >; the smoke density (minimum light transmittance) It is more than or equal to 60 percent;
the vertical flame spread H is less than or equal to 425mm.
2. Tensile, compression and impact resistance
The cable bears 3 times of tensile force of the cable;
the cable bears 300kg of pressure;
the cable withstands 20kg/10 impacts.
Claims (9)
1. A steel-cored aluminum conductor interlocked armored building fireproof cable structurally comprises a conductor, an insulating layer, a plurality of wire cores and a filling strand, wherein the conductor is wrapped by the insulating layer to form a wire core, and the wire core and the filling strand form a cable core, and is characterized in that the cable stranding pitch diameter ratio of the cable core is 30-40 times;
the conductor comprises a steel monofilament and a plurality of aluminum monofilaments; the steel monofilaments are arranged at the axial position of the conductor, a plurality of aluminum monofilaments are stranded layer by layer, the stranding directions of the aluminum monofilaments of adjacent layers are opposite, and the stranding direction of the outermost layer is the right direction; all ofThe sum of the cross-sectional areas of the aluminum monofilaments is 10mm 2 ～400mm 2 The cross-sectional area of the steel monofilament is 10mm 2 ～400mm 2 (ii) a The diameter of the steel monofilament is 1.50 mm-4.61 mm; the diameter of the aluminum monofilament is 1.50 mm-4.72 mm; the diameter of the conductor is 4.5 mm-28.0 mm;
the insulating layer is made of crosslinked polyethylene insulating material, and the nominal thickness of the insulating layer is 0.7 mm-2.0 mm;
the filling is composed of a non-hygroscopic filling material;
the cable core is sequentially wrapped with an inner sheath, an armor layer and an outer sheath from inside to outside;
the inner sheath is formed by extruding and wrapping a halogen-free low-smoke polyolefin sheath material, the thickness of the inner sheath is within the range of 1.0-1.8 mm of the nominal thickness of the inner sheath, and the thinnest thickness of the inner sheath is not less than 80-0.2 mm of the nominal thickness;
the armor layer is of an aluminum alloy interlocking armor structure;
the outer sheath is formed by extruding halogen-free low-smoke flame-retardant polyolefin sheath materials, the nominal thickness of the outer sheath is 1.8-3.7 mm, and the thinnest thickness of the outer sheath is not less than 80-0.2 mm of the nominal thickness.
2. The aluminum conductor steel reinforced interlocked armored building fireproof cable of claim 1, wherein the non-hygroscopic filler material is a glass fiber rope, and the filling factor is 1.6.
3. The steel-cored aluminum conductor interlocked armored building fireproof cable according to claim 1, wherein a first wrapping layer is further wrapped between the cable core and the inner sheath; the first lapping layer is formed by overlapping and lapping glass fiber tapes, and the average lapping rate of the overlapping and lapping is not less than 15%.
4. The steel-cored aluminum conductor interlocked armored type building fireproof cable according to claim 1, wherein a second wrapping layer is further wrapped between the armor layer and the outer sheath; the second is lapped by overlapping by the fire-retardant area of halogen-free low smoke and is formed, overlaps to lap and takes the percentage of covering not less than 15% on average.
5. The steel-cored aluminum conductor interlocking armor type building fireproof cable according to claim 1, wherein the aluminum alloy interlocking armor structure of the armor layer has a nominal thickness of the aluminum alloy strip of 0.5mm to 0.65mm and a width of the aluminum alloy strip of 9.5mm to 19.0mm.
6. The steel-cored aluminum conductor interlocking armor type building fireproof cable according to claim 1, wherein the cable is a cable rated at 0.6/1 kV;
in the conductor, the nominal cross-sectional area of the steel monofilament is 10mm 2 All the aluminum monofilaments have a nominal cross-sectional area of 70mm 2 。
7. The steel-cored aluminum conductor interlocking armor-type building fireproof cable according to claim 5, wherein the diameter of the steel monofilament is 3.80mm; the diameter of the aluminum monofilament is 3.80mm; the diameter of the conductor is 11.4mm;
the nominal thickness of the insulating layer is 1.1mm; the nominal thickness of the inner sheath is 1.2mm; the nominal thickness of the outer sheath is 2.1mm.
8. The aluminum conductor steel reinforced interlocking armor-type building fire-resistant cable of claim 3, wherein the nominal thickness of the glass fiber tape in said first wrapping layer is 0.2mm.
9. The aluminum conductor steel reinforced interlocking armor-type building fireproof cable of claim 4, wherein the nominal thickness of the halogen-free low-smoke flame-retardant tape of the second cladding is 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222604901.4U CN218729994U (en) | 2022-09-30 | 2022-09-30 | Steel-cored aluminum conductor interlocking armored building fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222604901.4U CN218729994U (en) | 2022-09-30 | 2022-09-30 | Steel-cored aluminum conductor interlocking armored building fireproof cable |
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| Publication Number | Publication Date |
|---|---|
| CN218729994U true CN218729994U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222604901.4U Active CN218729994U (en) | 2022-09-30 | 2022-09-30 | Steel-cored aluminum conductor interlocking armored building fireproof cable |
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| CN (1) | CN218729994U (en) |
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- 2022-09-30 CN CN202222604901.4U patent/CN218729994U/en active Active
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