CN209766110U - Bending-resistant tensile and cold-resistant power cable - Google Patents
Bending-resistant tensile and cold-resistant power cable Download PDFInfo
- Publication number
- CN209766110U CN209766110U CN201920911188.3U CN201920911188U CN209766110U CN 209766110 U CN209766110 U CN 209766110U CN 201920911188 U CN201920911188 U CN 201920911188U CN 209766110 U CN209766110 U CN 209766110U
- Authority
- CN
- China
- Prior art keywords
- resistant
- cable
- core
- layer
- tensile
- 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.)
- Expired - Fee Related
Links
- 238000005452 bending Methods 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 51
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052802 copper Inorganic materials 0.000 claims abstract description 40
- 239000010949 copper Substances 0.000 claims abstract description 40
- 239000003063 flame retardant Substances 0.000 claims abstract description 32
- 239000004020 conductor Substances 0.000 claims abstract description 30
- 229920001971 elastomer Polymers 0.000 claims abstract description 28
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000012792 core layer Substances 0.000 claims abstract description 16
- 239000011490 mineral wool Substances 0.000 claims abstract description 11
- 239000004800 polyvinyl chloride Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 9
- 238000009434 installation Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 235000010931 Mesua ferrea Nutrition 0.000 description 1
- 235000005704 Olneya tesota Nutrition 0.000 description 1
- 240000007909 Prosopis juliflora Species 0.000 description 1
- 235000008198 Prosopis juliflora Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model relates to a bending-resistant tensile cold-resistant power cable, which comprises a cable core formed by twisting a plurality of insulating wire cores, wherein each insulating wire core comprises an inner core which is fan-shaped in cross section and is formed by a plurality of thin and soft round copper wires, a plurality of copper wires are densely distributed outside the inner core to form an outer core layer, the inner core and the outer core layer form a double-layer copper conductor, and an insulating layer is extruded outside the copper conductor; heat-insulating rock wool ropes are filled among the plurality of insulating wire cores; wrapping a flame-retardant belt outside the cable core, filling the same rock wool rope between the cable core and the flame-retardant belt, and tightly binding the cable core by the flame-retardant belt; the outer side of the flame-retardant belt is sequentially extruded with a rubber layer, a tensile layer and a cold-resistant PVC sheath. The utility model discloses the structure is ingenious reasonable, adopts fan-shaped soft conductor structure, keeps its soft resistant curved performance when reducing the cable cost, and still possesses good characteristics such as bending radius is little, the fire resistance is high, the corrosion resistance is strong, resistant oil, wear-resisting, has greatly expanded cable application range.
Description
Technical Field
The utility model belongs to the technical field of the cable application technique and specifically relates to a resistant cold-resistant power cable of bending tensile.
Background
The power cable is a power device for transmitting power and distributing electric energy, and is an indispensable product for modern industry and social development. With the improvement of the domestic industrial level and the continuous application of new materials, new technologies and new equipment, the wire and the cable are rapidly developed. China exceeds the United states in terms of production value and becomes the world's largest country for producing wires and cables.
In individual areas of northwest and northeast of China, the temperature is low to 40 ℃ every year, and cables adopted in such climatic environments must have cold resistance; in the prior art, the temperature specified in most domestic electric wire and cable products during installation and laying is generally not lower than 0 ℃, and when the electric wire and cable products are used in an environment lower than 0 ℃, the cable needs to be heated to ensure that the temperature of a cable body is not lower than 0 ℃, so that the installation accident caused by embrittlement and cracking due to hardening of insulation and sheath materials during installation and laying is prevented. The China is wide in regions, particularly the winter cycle of the western and northern regions is long, if the cable laying is required to be not lower than 0 ℃, on one hand, the installation engineering of the electric wires and the cables cannot be carried out in winter, and the construction progress is influenced; on the other hand, the wires and cables are packaged by iron-wood composite disks, so that the wires and cables are large in appearance, difficult to heat and process, free of special heating tools and damaged in cable quality if not operated properly.
In cold regions in China, a plurality of limitations exist in cable laying, for example, when the cable is laid in a narrow space in a bending mode, the surface of a cable sheath is cracked due to the limitation of the cable structure, and a series of quality problems are caused; when the cable is laid in an environment with height drop, the tensile strength of the whole cable is required; when the tensile strength of the cable is required, the bending flexibility of the cable needs to be considered at the same time. Most enterprises adopt a cable of a second type of stranding compacted special-shaped conductor structure mentioned in the GB/T3956-2008 standard, the cable of the structure has limitation in bending laying, and the bending radius of a finished cable is more than or equal to 15 times of the outer diameter of the cable.
Usually, the cable enterprise can adopt steel wire armor structure to increase cable tensile properties, because the weight of cable also can be increased to the big inevitable of steel wire density, when this mode improves tensile properties, also brings inconvenience for the installation.
In summary, the cable in the prior art cannot meet the requirements of cold resistance, high tensile strength and good bending flexibility at the same time due to the structural limitation, and usually can only meet one of the performance requirements, so that the application of the cable is limited.
SUMMERY OF THE UTILITY MODEL
the applicant provides a bending-resistant tensile and cold-resistant power cable with a reasonable structure aiming at the defects in the prior art, so that the excellent performances of cold resistance, high tensile strength, good bending flexibility and the like are simultaneously met, the cable cost is greatly reduced, the practicability is good, and the application range is wide.
The utility model discloses the technical scheme who adopts as follows:
A bending-resistant, tensile and cold-resistant power cable comprises a cable core, wherein the cable core is formed by twisting a plurality of insulating wire cores, the cross section of each insulating wire core is of a fan-shaped structure, an internal copper conductor is formed by twisting for multiple times, and heat-insulating rock wool ropes are filled among the plurality of insulating wire cores; the fire-retardant belt is wrapped outside the cable core, the same rock wool rope is filled between the cable core and the fire-retardant belt, and the fire-retardant belt tightly ties the cable core; the flame-retardant belt is extruded and wrapped with a rubber layer, the outer side of the rubber layer is wound with a tensile layer, and the outer side of the tensile layer is extruded and wrapped with a cold-resistant PVC sheath.
As a further improvement of the above technical solution:
The structure of the insulated wire core is as follows: the copper conductor comprises an inner core with a fan-shaped section, wherein the inner core is composed of a plurality of thin and soft round copper wires, a plurality of copper wires are densely distributed on the outer side of the inner core to form an outer core layer, and the inner core and the outer core layer form a double-layer copper conductor; and the outer side of the copper conductor is extruded with an insulating layer.
The inner core is formed by complex twisting of a plurality of soft round copper wires with the diameter smaller than 0.2mm, and the outer core layer is formed by a plurality of soft round copper wires with the diameter of 1.0mm-2.0 mm; the inner core and the outer core layer are jointly twisted and compressed to form the fan-shaped copper conductor.
The insulating layer is thermoplastic polyurethane elastomer rubber which has insulating characteristics.
The flame-retardant belt is a low-smoke halogen-free high-flame-retardant belt, the thickness of the flame-retardant belt is greater than 0.2mm, and the overlapping wrapping rate is greater than 20%.
The rubber layer is formed by extruding and wrapping high-temperature-resistant 180-DEG C silicon rubber.
the tensile layer is a circular polypropylene rope wound on the outer side of the rubber layer through twisting equipment.
The PVC sheath is a cold-resistant polyvinyl chloride sheath material, the oxygen index of the PVC sheath is more than 38%, and the mechanical property of the PVC sheath is maintained at minus 40 ℃.
the utility model has the advantages as follows:
The utility model discloses compact structure, it is reasonable, through adopting the fan-shaped inner core that constitutes by many thin soft round copper wires compound twists to strand the one deck outside the inner core and by the outer core layer that the soft round copper wire of diameter 1.0 ~ 2.0mm constitutes, sticis through fan-shaped pinch roller and has formed the copper conductor of cross-section for fan-shaped structure, the problem that soft conductor can't sticis the formation fan-shaped structure has been solved, and the flexibility that soft conductor itself can be kept, the whole external diameter of cable has been reduced, greatly reduced the cable cost, the bending resistance of cable can be improved.
The utility model discloses still include following advantage:
The insulating layer extruded on the outer side of the copper conductor is thermoplastic polyurethane elastomer rubber, has insulating property, and has the advantages of good elasticity, oil resistance, corrosion resistance, good insulating property and the like, when the cable is bent, the insulating layer can be deformed along with the bending of the copper conductor in a very consistent manner, so that the insulating property of the copper conductor is ensured, and the copper conductor can be tightly attached to the copper conductor to realize the bending better;
The copper conductor generates heat when transmitting current, but the heat is rapidly dissipated due to the environmental temperature, so that the temperature of the cable body in an extremely cold area is difficult to keep above 0 ℃; in the utility model, the heat-preserving rock wool rope is filled in the cable core and between the cable core and the flame-retardant belt, and the rubber layer is extruded outside the flame-retardant belt and is made of silicon rubber with excellent cold resistance, thereby greatly reducing the heat dissipation of the cable and ensuring the cable to operate at normal working temperature;
The tensile layer is the circular polypropylene fibre rope of closely winding in the rubber layer outside through transposition equipment, and the polypropylene fibre rope has light in weight, intensity height, advantage that wear resistance is good, has effectively promoted the whole tensile strength of cable, and does not influence other mechanical properties of cable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure diagram of the insulated wire core of the present invention.
Wherein: 1. an insulated wire core; 2. a flame retardant tape; 3. a rubber layer; 4. a tensile layer; 5. a PVC sheath; 6. rock wool rope; 11. an inner core; 12. an outer core layer; 13. an insulating layer.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the bending-resistant, tensile and cold-resistant power cable of the embodiment includes a cable core, the cable core is formed by twisting a plurality of insulating wire cores 1, the cross section of a single insulating wire core 1 is a fan-shaped structure, an internal copper conductor is formed by twisting a plurality of times, and heat-insulating rock wool ropes 6 are filled between the plurality of insulating wire cores 1; the flame-retardant belt 2 is wrapped outside the cable core, the same rock wool rope 6 is filled between the cable core and the flame-retardant belt 2, and the cable core is fastened by the flame-retardant belt 2; the rubber layer 3 is extruded and wrapped on the outer side of the flame-retardant belt 2, the tensile layer 4 is wound on the outer side of the rubber layer 3, and the cold-resistant PVC sheath 5 is extruded and wrapped on the outer side of the tensile layer 4.
As shown in fig. 2, the structure of the insulated wire core 1 is: the copper conductor comprises an inner core 11 with a fan-shaped section, wherein the inner core 11 is composed of a plurality of thin and soft round copper wires, the outer side of the inner core 11 is densely distributed with a plurality of copper wires to form an outer core layer 12, and the inner core 11 and the outer core layer 12 form a double-layer copper conductor; the copper conductor is extruded with an insulating layer 13.
The inner core 11 is formed by complex twisting of a plurality of soft round copper wires with the diameter smaller than 0.2mm, and the outer core layer 12 is formed by a plurality of soft round copper wires with the diameter of 1.0mm-2.0 mm; the inner core 11 and the outer core 12 are twisted together and pressed to form a fan-shaped copper conductor.
Firstly bunching a plurality of soft round copper wires with the diameter of less than 0.2mm into strands, controlling the pitch of each strand of wires to be 18-22 times, and repeatedly stranding the bunched plurality of strands of wires through stranding equipment to form an inner core 11; then twisting a layer of soft round copper wire with the diameter of 1.0mm-2.0mm on the outer layer of the inner core 11, and forming by adopting a fan-shaped pressing wheel; the stranding of the inner core 11 and the outer core layer 12 is completed by the same stranding equipment, and the stranding is completed in a layered mode at one time, and the stranding pitch of each layer is controlled to be 10-16 times; the problem of the flexible conductor can't sticis and form fan-shaped structure is solved, and the softness performance of flexible conductor itself has been kept, has reduced the whole external diameter of cable, greatly reduced cable cost, improved the bending resistance of cable. The insulating layer is thermoplastic polyurethane elastomer rubber which has insulating characteristics.
The insulating layer 13 is thermoplastic polyurethane elastomer rubber which has insulating property, and a semi-extrusion pipe type mould is adopted for production when the insulating layer 13 is extruded so as to ensure that the insulating layer 13 is better and tightly attached to a copper conductor, thereby ensuring the stability of the insulating property when the cable is bent.
The flame-retardant belt 2 is a low-smoke halogen-free high-flame-retardant belt, the thickness of the flame-retardant belt is more than 0.2mm, and the overlapping wrapping rate is more than 20%.
The rubber layer 3 is formed by extruding and wrapping silicon rubber with high temperature resistance of 180 ℃.
The heat-preservation rock wool rope 6 is filled in the cable core and between the cable core and the flame-retardant belt 2, the rubber layer 3 is extruded outside the flame-retardant belt 2, and the rubber layer 3 is made of silicon rubber with excellent cold resistance, so that the heat dissipation of the cable is greatly reduced, and the cable is ensured to operate at normal working temperature.
Tensile layer 4 is for the circular polypropylene fibre rope in the 3 outsides in rubber layer through the winding of transposition equipment, and the polypropylene fibre rope has light in weight, intensity height, advantage that wear resistance is good, has effectively promoted the whole tensile strength of cable, and does not influence other mechanical properties of cable.
The PVC sheath 5 is a cold-resistant PVC sheath material, has an oxygen index of more than 38 percent and can maintain the mechanical property at the temperature of minus 40 ℃.
The utility model discloses cable structure is ingenious, combines the material layer, has not only reduced cable overall cost, has more kept its soft resistant curved performance, and cold-resistant, wear-resisting, the fire resistance is high, and the practicality is strong, and application scope is wide.
the above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.
Claims (8)
1. The utility model provides a resistant cold-resistant power cable of bending tensile which characterized in that: the cable comprises a cable core, wherein the cable core is formed by twisting a plurality of insulating wire cores (1), the cross section of a single insulating wire core (1) is of a fan-shaped structure, an internal copper conductor is formed by twisting for many times, and heat-insulating rock wool ropes (6) are filled among the plurality of insulating wire cores (1); the flame-retardant cable is characterized in that a flame-retardant belt (2) is wrapped outside the cable core, the same rock wool rope (6) is filled between the cable core and the flame-retardant belt (2), and the cable core is fastened by the flame-retardant belt (2); the flame-retardant belt is characterized in that the rubber layer (3) is wrapped outside the flame-retardant belt (2), the tensile layer (4) is wound outside the rubber layer (3), and the cold-resistant PVC sheath (5) is wrapped outside the tensile layer (4) in an extruded mode.
2. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 1, wherein: the structure of the insulated wire core (1) is as follows: the copper-clad laminated core comprises an inner core (11) with a fan-shaped section, wherein the inner core (11) is composed of a plurality of thin and soft round copper wires, the outer side of the inner core (11) is densely distributed with the plurality of copper wires to form an outer core layer (12), and the inner core (11) and the outer core layer (12) form a double-layer copper conductor; and an insulating layer (13) is extruded and coated on the outer side of the copper conductor.
3. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 2, wherein: the inner core (11) is formed by twisting a plurality of soft round copper wires with the diameter smaller than 0.2mm in a compound mode, and the outer core layer (12) is formed by a plurality of soft round copper wires with the diameter of 1.0mm-2.0 mm; the inner core (11) and the outer core layer (12) are jointly twisted and compressed to form a fan-shaped copper conductor.
4. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 2, wherein: the insulating layer (13) is thermoplastic polyurethane elastomer rubber which has insulating properties.
5. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 1, wherein: the flame-retardant belt (2) is a low-smoke halogen-free high-flame-retardant belt, the thickness of the flame-retardant belt is greater than 0.2mm, and the overlapping wrapping rate is greater than 20%.
6. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 1, wherein: the rubber layer (3) is formed by extruding and wrapping silicon rubber with high temperature resistance of 180 ℃.
7. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 1, wherein: the tensile layer (4) is a circular polypropylene rope wound on the outer side of the rubber layer (3) through twisting equipment.
8. The bending-resistant, tensile and cold-resistant power cable as claimed in claim 1, wherein: the PVC sheath (5) is a cold-resistant PVC sheath material, the oxygen index of the PVC sheath material is more than 38%, and the mechanical property of the PVC sheath material is maintained at the temperature of minus 40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920911188.3U CN209766110U (en) | 2019-06-17 | 2019-06-17 | Bending-resistant tensile and cold-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920911188.3U CN209766110U (en) | 2019-06-17 | 2019-06-17 | Bending-resistant tensile and cold-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209766110U true CN209766110U (en) | 2019-12-10 |
Family
ID=68746058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920911188.3U Expired - Fee Related CN209766110U (en) | 2019-06-17 | 2019-06-17 | Bending-resistant tensile and cold-resistant power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209766110U (en) |
-
2019
- 2019-06-17 CN CN201920911188.3U patent/CN209766110U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202473308U (en) | Acid and alkali-resistant oil-resistant ultraviolet-resistant moisture-proof environment-friendly type flat drag cable | |
| CN111276285B (en) | Super-deep well mine suspended cable and production process thereof | |
| CN104036854A (en) | High-tensile flexible corrosion-resistant degaussing cable for ship | |
| CN212010496U (en) | Environment-friendly safe fireproof cable | |
| CN202694975U (en) | Power cable special for oil well | |
| CN211669996U (en) | Lightweight high-flexibility high-temperature-resistant cable | |
| CN203406054U (en) | Fireproof aluminum conductor cable | |
| CN209766110U (en) | Bending-resistant tensile and cold-resistant power cable | |
| CN210295969U (en) | Compression-resistant anti-corrosion cable | |
| CN204857266U (en) | Novel do not take flexible fireproof cable of metal sheath | |
| CN202150287U (en) | Antistatic oil resistance type control cable | |
| CN207182954U (en) | Polyvinyl chloride butyronitrile insulated cable | |
| CN204204443U (en) | A kind of fire resistant flame retardant polyvinyl chloride butyronitrile composition polymer insulated cable | |
| CN203366791U (en) | Super-large cross section high-strength ultra-soft rubber-sheathed cable for coal mining machine | |
| CN202694877U (en) | Flat and soft cable for reinforced hoisting machinery and transportation equipment | |
| CN203102974U (en) | Power cable used for 8.7/10kV ethylene-propylene-diene monomer insulation oil platform | |
| CN202003716U (en) | Cable for mining conveyance machinery | |
| CN206003511U (en) | A kind of high flexibility cable | |
| CN205810417U (en) | A kind of flexible dynamic control of tension is combined reel flat cable | |
| CN204332506U (en) | Communication power supply five-core flame-retardant aluminium alloy flexible cable | |
| CN202495270U (en) | Computer flexible cable with flame retardant polyolefin insulation elastomer rubber sheath | |
| CN206312628U (en) | A kind of superelevation tensile strength weather resistant charging pile cable | |
| CN206312637U (en) | Rolling resistance type automobile charging pile cable | |
| CN107464606B (en) | Mining bending-resistant dragging cable and manufacturing method thereof | |
| CN216311406U (en) | Temperature-resistant and aging-resistant charging pile cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 |