CN219738623U - High-current-carrying capacity power cable - Google Patents
High-current-carrying capacity power cable Download PDFInfo
- Publication number
- CN219738623U CN219738623U CN202321123415.9U CN202321123415U CN219738623U CN 219738623 U CN219738623 U CN 219738623U CN 202321123415 U CN202321123415 U CN 202321123415U CN 219738623 U CN219738623 U CN 219738623U
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- China
- Prior art keywords
- layer
- carrying capacity
- insulating
- heat
- power cable
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Links
- 239000004020 conductor Substances 0.000 claims abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003063 flame retardant Substances 0.000 claims abstract description 27
- 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 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 230000017525 heat dissipation Effects 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 7
- 229920006231 aramid fiber Polymers 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000009422 external insulation Methods 0.000 claims description 2
- 230000017105 transposition Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 38
- 238000000034 method Methods 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model relates to a high-current-carrying capacity power cable, which comprises a plurality of groups of insulating wire cores, wherein each insulating wire core comprises a conductor and an insulating layer arranged outside the conductor, each conductor comprises a threaded copper pipe and a plurality of trapezoidal copper wires stranded outside the threaded copper pipe, each insulating layer is wrapped outside the trapezoidal copper wires, each group of insulating wire cores is stranded into a cable core, a metal shielding layer is arranged outside each cable core, filling strips are arranged at gaps between each cable core and each metal shielding layer, a flame-retardant heat-insulating layer is arranged outside each metal shielding layer, a heat-insulating heat-dissipating layer is arranged outside each flame-retardant heat-dissipating layer, and a flame-retardant outer protecting layer is arranged outside each heat-insulating heat-dissipating layer. Has the characteristics of high current-carrying capacity and high flame retardance.
Description
Technical Field
The utility model relates to the technical field of power cables, in particular to a high-current-carrying capacity power cable.
Background
The current-carrying capacity refers to the amount of current that a cable line passes when carrying electrical energy, and under thermally stable conditions, the current-carrying capacity of a cable when the cable conductor reaches a long-term allowable operating temperature is referred to as the long-term allowable current-carrying capacity of the cable. The current carrying capacity is related to the arrangement of the conductors, the ambient temperature, the insulating material, etc. The higher the cable operating temperature, the lower the current carrying capacity of the conductor, which is the most common problem. The operating temperature includes the influence of heat and surrounding environment temperature that produces when self operation, and in many cases, ambient temperature is uncontrollable, and ventilation effect, sunshine, cable density etc. all influence ambient temperature, and then influence cable current-carrying capacity. If multiple cables are too close together, charge may be concentrated somewhere in the conductor, which will greatly reduce the current carrying capacity of the cable. The heat conduction and heat dissipation properties and the flame retardance of the cable protection layer determine the current-carrying capacity of the lead from another aspect.
The heat generated by the power cable used at present cannot be effectively and rapidly discharged, and the heat conduction and heat dissipation of the protective layer are not high, the flame retardance is not high, the current carrying capacity of the power cable used at present is not fully utilized due to the fact that the cable is easily affected by external environment and other factors, if the current carrying capacity is forcibly increased, safety accidents are easy to occur, and therefore the power cable with high current carrying capacity is needed.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model discloses a high-current-carrying capacity power cable which has the characteristics of high current-carrying capacity and high flame retardance, and solves the problems in the prior art.
The utility model is realized by the following technical scheme:
the utility model provides a high current-carrying capacity power cable, includes a plurality of groups of insulating core, insulating core includes conductor and conductor external insulation layer, the conductor includes screw copper pipe, transposition many trapezoidal copper wires outside the screw copper pipe, the insulating layer parcel is outside trapezoidal copper wire, a plurality of groups of insulating core hank become the cable core, the cable core set up the filler strip outward in the clearance department between cable core and the metal shielding layer, the metal shielding layer set up fire-retardant insulating layer outward, fire-retardant insulating layer sets up thermal-insulated heat dissipation layer outward, thermal-insulated heat dissipation layer sets up fire-retardant outer sheath outward.
Further preferably, the filling strip is of a fan-shaped honeycomb structure and is provided with a through hollow part at the center.
Further optimally, the metal shielding layer is a copper wire and aramid fiber combined braided structure.
Further optimally, the flame-retardant heat-insulating layer is made of ceramic silicon rubber materials.
Further optimally, the heat insulation and dissipation layer is of an extrusion structure, and elliptical hollow parts are uniformly arranged at intervals.
Further preferably, the number of the insulating wire cores is 3, the 3 insulating wire cores are mutually abutted and distributed on the same circumference, and the part surrounded by the 3 insulating wire cores is hollow.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the conductor adopts a hollow structure, the filling strip adopts a hollow structure, the heat insulation and dissipation layer adopts an elliptical hollow extrusion structure, so that the heat dissipation and heat dissipation of the cable are facilitated, the heat insulation characteristic is realized, the internal attack of external heat is avoided, and the current carrying capacity of the cable is improved.
2. The metal shielding layer arranged outside the cable core adopts a copper wire and aramid fiber combined braided structure, the copper wire braided shielding structure is adopted to avoid electromagnetic interference outside the cable, the stability of the current carrying capacity of the cable conductor is improved, the aramid fiber is added into the copper wire braided shielding structure to improve the stability of the metal shielding layer structure, the fastening effect of the shielding structure on the stability of the cable core structure is improved, and the cable core structure is more stable.
3. The ceramic silicon rubber is used as a flame-retardant heat-insulating layer material, and has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, the residue after combustion is a hard ceramic shell, and the ceramic silicon rubber has excellent heat-insulating property, so that the flame-retardant heat-insulating property of the cable is improved. And simultaneously, the flame retardant heat insulation layer and the flame retardant outer protective layer are arranged, so that the flame retardant performance of the cable is higher.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or features are generally identified by like reference numerals throughout the drawings. In the drawings, the elements or components are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a power cable of the present utility model;
FIG. 2 is a block diagram of a filler strip of the present utility model;
FIG. 3 is a block diagram of the heat insulating and dissipating layer of the present utility model.
In the figure, 1, a threaded copper pipe; 2. trapezoidal copper wires; 3. an insulating layer; 4. filling strips; 41. a through hollow portion; 42. a fan-shaped honeycomb structure; 5. a metal shielding layer; 6. a flame retardant insulating layer; 7. a heat insulation and dissipation layer; 71. an extrusion structure; 72. an elliptical hollow portion; 8. and a flame-retardant outer protective layer.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
As shown in fig. 1-2, a high-current-carrying capacity power cable comprises a plurality of groups of insulating wire cores, wherein each insulating wire core comprises a conductor and an insulating layer 3 arranged outside the conductor, each conductor comprises a threaded copper pipe 1 and a plurality of trapezoidal copper wires 2 stranded outside the threaded copper pipe 1, each insulating layer 3 is wrapped outside the trapezoidal copper wires 2, each group of insulating wire cores is stranded into a cable core, a metal shielding layer 5 is arranged outside each cable core, a filling strip 4 is arranged at a gap between each cable core and each metal shielding layer 5, a flame-retardant heat-insulating layer 6 is arranged outside each metal shielding layer 5, a heat-insulating heat-dissipating layer 7 is arranged outside each flame-retardant heat-dissipating layer 6, and a flame-retardant outer protective layer 8 is arranged outside each heat-insulating heat-dissipating layer 7.
The conductor adopts the threaded copper pipe 1, so that the bending degree of the conductor is increased, the heat dissipation and heat extraction capacity of the conductor is increased, the heat generated in the cable operation process is timely discharged, and the current carrying capacity is increased. The cable conductor current transmission has the skin effect, namely: when there is alternating current or alternating electromagnetic field in the conductor, the current distribution inside the conductor is uneven. The current density in the conductor decreases exponentially as the distance from the surface of the conductor increases, i.e. the current in the conductor concentrates at the surface of the conductor. The cable conductor of the utility model adopts a hollow structure, and the conductor with the same section has larger outer diameter, so that the current carrying capacity of the conductor is larger. The flame-retardant heat-insulating layer 6 and the flame-retardant outer protective layer 8 enable the cable to have higher flame-retardant performance.
In some embodiments, the filler strip 4 is a fan-shaped honeycomb structure 42 and is centrally disposed through the hollow 41.
The packing strip 4 can fix the insulating core, guarantees the structural stability of cable core, and hollow structure is favorable to the heat dissipation and heat extraction of cable, and cellular structure is favorable to thermal-insulated, avoids the internal attack of outside heat to increased the current-carrying capacity of cable, packing strip 4 adopts fan-shaped can increase the area of contact with insulating core, thereby fixed insulating core better.
In some embodiments, the metal shielding layer 5 is a copper wire and aramid wire combined braided structure.
The adoption of the copper wire braided shielding structure avoids electromagnetic interference outside the cable, the stability of the current carrying capacity of the cable conductor is improved, the aramid fiber wires are added into the copper wire braided shielding structure to improve the stability of the metal shielding layer 5 structure, and the fastening effect of the shielding structure on the stability of the cable core structure is improved, so that the cable core structure is more stable.
In some embodiments, the flame retardant and heat insulating layer 6 is made of a ceramic silicone rubber material.
The ceramic silicon rubber is used as a flame-retardant heat-insulating layer material, and has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, the residue after combustion is a hard ceramic shell, and the ceramic silicon rubber has excellent heat-insulating property, so that the flame-retardant heat-insulating property of the cable is improved.
In some embodiments, the heat insulating and dissipating layer 7 is an extruded structure 71, and oval hollow portions 72 are uniformly arranged at intervals.
The heat insulation and dissipation layer of the embodiment is made by an extrusion process, and the oval hollow extrusion structure 71 is used for facilitating heat dissipation and heat extraction of the cable, has heat insulation property, and avoids internal attack of external heat, thereby increasing the current carrying capacity of the cable.
In some embodiments, the number of the insulating wire cores is 3, the 3 insulating wire cores are in abutting connection with each other and distributed on the same circumference, and the part surrounded by the 3 insulating wire cores is hollow, so that heat generated in the cable operation process can be discharged in time, and the current carrying capacity is increased.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model and are intended to be within the scope of the appended claims and description; any alternative modifications or variations to the embodiments of the present utility model will fall within the scope of the present utility model for those skilled in the art.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (6)
1. A high current carrying capacity power cable, characterized by: including a plurality of groups of insulating core, insulating core includes conductor and conductor external insulation layer, the conductor includes screw copper pipe, transposition many trapezoidal copper wires outside the screw copper pipe, the insulating layer parcel is outside trapezoidal copper wire, a plurality of groups of insulating core hank becomes the cable core, the cable core set up the filler strip outward, the space department between cable core and the metal shielding layer set up the filler strip, the metal shielding layer set up fire-retardant insulating layer outward, set up thermal-insulated heat dissipation layer outward of fire-retardant insulating layer, set up fire-retardant outer sheath outward of thermal-insulated heat dissipation layer.
2. A high current carrying capacity power cable according to claim 1, wherein: the filling strip is of a fan-shaped honeycomb structure, and a through hollow part is arranged in the center of the filling strip.
3. High current carrying capacity power cable according to claim 1 or 2, wherein: the metal shielding layer is of a copper wire and aramid fiber combined braided structure.
4. A high current carrying capacity power cable according to claim 1 or 2, wherein: the flame-retardant heat-insulating layer is made of ceramic silicon rubber materials.
5. A high current carrying capacity power cable according to claim 1 or 2, wherein: the heat insulation and dissipation layer is of an extrusion structure, and elliptical hollow parts are uniformly arranged at intervals.
6. A high current carrying capacity power cable according to claim 1, wherein: the insulation sinle silk is 3, and 3 insulation sinle silk butt distributes on same circumference each other, and the partial cavity that 3 insulation sinle silk surrounded sets up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321123415.9U CN219738623U (en) | 2023-05-08 | 2023-05-08 | High-current-carrying capacity power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321123415.9U CN219738623U (en) | 2023-05-08 | 2023-05-08 | High-current-carrying capacity power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219738623U true CN219738623U (en) | 2023-09-22 |
Family
ID=88025202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321123415.9U Active CN219738623U (en) | 2023-05-08 | 2023-05-08 | High-current-carrying capacity power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219738623U (en) |
-
2023
- 2023-05-08 CN CN202321123415.9U patent/CN219738623U/en active Active
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