CN212541999U - Coaxial waterproof power cable - Google Patents
Coaxial waterproof power cable Download PDFInfo
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- CN212541999U CN212541999U CN202020972097.3U CN202020972097U CN212541999U CN 212541999 U CN212541999 U CN 212541999U CN 202020972097 U CN202020972097 U CN 202020972097U CN 212541999 U CN212541999 U CN 212541999U
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- 239000004020 conductor Substances 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 182
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000011247 coating layer Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 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 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Insulated Conductors (AREA)
Abstract
The utility model discloses a coaxial waterproof power cable, include: the outer periphery of the inner conductor layer sequentially comprises an inner insulating layer, an inner semi-conductive water-blocking buffer layer, a middle conductor layer, a middle insulating layer, a middle semi-conductive water-blocking buffer layer, an outer conductor layer, an outer insulating water-blocking layer and an outer tegument from inside to outside; the inner insulating layer, the inner semi-conductive water-blocking buffer layer, the middle conductor layer, the middle insulating layer, the middle semi-conductive water-blocking buffer layer, the outer conductor layer, the outer insulating water-blocking layer and the outer tegument layer of the cable are all concentric structures taking the inner conductor layer as the center. The utility model provides a scheme forms coaxial waterproof power cable with the concentric structure that the inner conductor layer is the center to through set up insulating layer and semiconduction buffer layer that blocks water between the conductor layer of difference, and set up outer insulation water-blocking layer and outer tegillum at the cable is outmost, make the cable when providing good power conduction, guaranteed the insulating water-proof effects of cable, improved the security of cable.
Description
Technical Field
The utility model relates to the technical field of cables, concretely relates to coaxial waterproof power cable.
Background
The existing single-phase power cable with rated voltage of 0.6/1kV and below has the following defects:
1) the number of conductor cores of the cable is 2 cores and 35mm2And the conductors below the cable are of a circular structure, 2 insulating wire cores are twisted together, gaps among the insulating wire cores are large, and more fillers are required to be filled in the gaps, so that the outer diameter of the cable is large, and the circular insulating wire cores of the cable are unstable in structure and easily deform when the cable is subjected to external force.
2) The conductor core number of cable is 2 cores, and one of them core is the principal core, and another core is neutral sinle silk, and 2 sinle silks form a single-phase return circuit, and the cable does not have the structure of ground protection sinle silk, when the principal core took place to insulate with the metal casing of consumer and badly appears the electric leakage, easily caused people to contact the consumer and the electric shock accident.
3) There are more gaps between metal wires and between insulated wire cores in the conductor of the cable, and the conductor of the cable and the insulated wire core can not achieve longitudinal water resistance.
Therefore, how to effectively improve the safe and reliable performance of the single-phase distribution power cable is an urgent problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
To the problem that current single-phase distribution power cable exists in the aspect of fail safe nature, the utility model aims to provide a safe and reliable's coaxial waterproof power cable.
In order to achieve the above object, the utility model provides a coaxial waterproof power cable, include: the waterproof structure comprises an inner conductor layer, wherein the periphery of the inner conductor layer sequentially comprises an inner insulating layer, an inner semi-conductive water-blocking buffer layer, a middle conductor layer, a middle insulating layer, a middle semi-conductive water-blocking buffer layer, an outer conductor layer, an outer insulating water-blocking layer and an outer tegument from inside to outside; the inner insulating layer, the inner semi-conductive water-blocking buffer layer, the middle conductor layer, the middle insulating layer, the middle semi-conductive water-blocking buffer layer, the outer conductor layer, the outer insulating water-blocking layer and the outer tegument layer of the cable are all concentric structures taking the inner conductor layer as the center.
Further, the inner conductor layer is a steel core forming conductor and comprises a round steel wire, a semi-conductive water-resistant layer and a forming metal wire twisting layer, the semi-conductive water-resistant layer longitudinally wraps the outer surface of the round steel wire, and the forming metal wire twisting layer longitudinally wraps the outer surface of the semi-conductive water-resistant belt.
Furthermore, the formed metal wire stranded layer is formed by stranding a plurality of formed metal wires.
Furthermore, the middle conductor layer and the outer conductor layer are formed by twisting a plurality of formed metal wires.
Furthermore, the inner insulating layer, the middle insulating layer, the outer insulating layer and the outer coating layer are all plastic layers made of polyolefin materials.
Furthermore, the outer insulating water-blocking layer is formed by overlapping and wrapping insulating water-blocking tapes.
The utility model provides a scheme has ensured that the metal casing when the main line core and consumer take place to insulate when bad appearing the electric leakage through setting up the inner conductor layer, can not make the electrical equipment of adult contact yet and take place the electric shock accident, so sets up and makes the cable have higher fail safe nature.
The utility model provides a scheme is through setting up insulating layer and semiconduction buffer layer that blocks water between the conductor layer of difference to and set up outer insulating water-blocking layer and outer tegillum at the cable is outmost, make the cable when providing good power conduction, guaranteed the insulation and the water-proof effects of cable.
The utility model provides a scheme forms coaxial waterproof power cable with the concentric structure of inner conductor layer as the center for the cable has stable in structure round and the external diameter is little, higher stretching resistance, is applicable to the higher place of safety requirement.
Drawings
The invention is further described with reference to the following drawings and detailed description.
Fig. 1 is a schematic structural diagram of a cross section of a coaxial waterproof power cable in the present example.
The reference numbers in the figures mean:
the inner conductor layer 100, the round steel wire 110, the semi-conductive water-blocking layer 120, the formed metal wire stranded layer 130, the inner insulating layer 200, the inner semi-conductive water-blocking buffer layer 300, the middle conductor layer 400, the middle insulating layer 500, the middle semi-conductive water-blocking buffer layer 600, the outer conductor layer 700, the outer insulating layer 800, the outer insulating water-blocking layer 900 and the outer coating layer 1000.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1, a schematic structural diagram of a cross section of a coaxial waterproof power cable, which is a high-safety reliable distribution power cable and is mainly applied to a place with high safety requirements, is shown.
As shown in fig. 1, the coaxial waterproof power cable mainly includes an inner conductor layer 100, and the outer periphery of the inner conductor layer 100 sequentially includes, from inside to outside, an inner insulating layer 200, an inner semi-conductive water-blocking buffer layer 300, a middle conductor layer 400, a middle insulating layer 500, a middle semi-conductive water-blocking buffer layer 600, an outer conductor layer 700, an outer insulating layer 800, an outer insulating water-blocking layer 900, and an outer coating layer 1000, thereby forming the coaxial waterproof power cable in this example.
Wherein, inner conductor layer 100 sets up in this coaxial waterproof power cable's central point and puts, and the protection ground connection of mainly used equipment guarantees when the metal casing of main line core and consumer takes place to insulate badly when appearing the electric leakage, also can not cause the people to contact the consumer and take place the electric shock accident, so sets up the fail safe nature who has improved the cable.
Specifically, the inner conductor layer 100 is mainly composed of a circular steel wire 110 at the center, a semi-conductive water-blocking layer 120 and a formed metal wire stranded layer 130, which are sequentially coated on the periphery of the circular steel wire 110 from inside to outside. The semi-conductive water-blocking tape 120 is longitudinally wrapped on the outer surface of the round steel wire 110, and the formed metal wire stranded layer 130 is longitudinally wrapped on the outer surface of the semi-conductive water-blocking tape 120.
The round steel wire 110 is mainly used to improve the strength of the whole molded coaxial waterproof power cable.
When specifically setting up, round steel wire 110 can prefer circular zinc-plated copper wire for use, so set up for the round steel wire 110 that is located the cable center has great tensile strength, can bear the stretching resistance of cable, also is favorable to laying when the cable has the drop environment simultaneously.
On the other hand, the arrangement of the zinc coating on the round steel wire 110 improves the corrosion resistance of the inner conductor layer 100, improves the safety and reliability of the cable, and prolongs the service life of the cable.
Semiconductive water-blocking layer 120 specifically overlaps around the package by semiconductive water-blocking buffer tape and constitutes, semiconductive water-blocking layer 120 has mechanical cushioning effect to shaping wire stranded layer 130, can prevent that shaping wire stranded layer 130 from leading to the fact mechanical damage to circle copper wire 110, semiconductive water-blocking layer 120 is under shaping wire stranded layer 130 mechanical extrusion effect simultaneously, can fill in the space of shaping wire stranded layer 130 internal surface, semiconductive water-blocking layer 120 meets water or moisture can expand rapidly and fill in the space between shaping wire stranded layer 130 and round steel wire 110, thereby prevent vertical and radial infiltration of water or moisture.
The formed metal wire twisting layer 130 is mainly used for forming a main structure of the inner conductor layer 100, and is formed by twisting a plurality of formed metal wires (not shown in the figure), and the formed metal wires may be preferably formed aluminum wires or formed aluminum alloy wires when being specifically disposed.
The inner insulating layer 200 is extruded and coated outside the inner conductor layer 100 in a tight extrusion manner, and is formed of a polyolefin insulating layer having good insulating property and waterproof property, and plays roles of uniform electric field, insulation and waterproof when the cable is operated.
For example, the inner insulating layer 200 is preferably made of cross-linked polyethylene, which not only has good sealing, insulating and waterproof properties and can enhance the safety and reliability of the cable, but also has good hardness and elongation at break, so that the power cable has good flexibility and flexibility, stable and round structure and small outer diameter.
The inner semi-conductive water-blocking buffer layer 300 is formed by overlapping and wrapping semi-conductive water-blocking buffer tapes, the inner semi-conductive water-blocking buffer layer 300 has a mechanical buffering effect on the middle conductor layer 400, and can prevent the middle conductor layer 400 from causing mechanical damage to the inner insulating layer 200, meanwhile, the inner semi-conductive water-blocking buffer layer 300 can be filled in a gap on the inner surface of the middle conductor layer 400 under the mechanical extrusion effect of the middle conductor layer 400, the inner semi-conductive water-blocking buffer layer 300 can be rapidly expanded when meeting water or moisture, and the gap between the inner insulating layer 200 and the middle conductor layer 400 is filled, so that.
The middle conductor layer 400 is formed by twisting formed metal wires having a large elongation, high flexibility, and good conductivity, the formed metal wires are in full contact with each other to provide good conductivity and waterproof performance, and the middle conductor layer is disposed outside the inner semiconductive water-blocking buffer layer 300.
The middle insulating layer 500 is extruded and coated outside the middle conductor layer 400 in a tight extrusion mode, and the specific arrangement of the middle insulating layer 500 is the same as that of the inner insulating layer 200, which is not described herein again.
The middle semi-conductive water-blocking buffer layer 600 is formed by overlapping and wrapping semi-conductive water-blocking buffer tapes, and the specific arrangement of the middle semi-conductive water-blocking buffer layer is the same as that of the inner semi-conductive water-blocking buffer layer 300, which is not described herein again.
The outer conductor layer 700 is disposed outside the middle semi-conductive water blocking buffer layer 600, and the specific configuration thereof is the same as that of the middle conductor layer 400, which is not described herein again.
The outer insulating layer 800 is extruded and wrapped outside the outer conductor layer 700 in a tight extrusion manner, and the specific arrangement thereof is the same as that of the inner insulating layer 200 and the middle insulating layer 500, and the detailed description thereof is omitted.
The outer insulating and water-blocking layer 900 is formed by overlapping and wrapping insulating and water-blocking tapes, the outer insulating and water-blocking layer 900 rapidly expands when encountering water or moisture and fills the gap between the outer insulating layer 800 and the outer layer 1000, so that the water or moisture is prevented from longitudinally and radially permeating, the outer insulating and water-blocking layer 900 has certain insulating property, and the insulating property between the outer conductor layer 700 and the outside can be enhanced together with the outer insulating layer 800.
The outer layer 1000 is tightly extruded and coated outside the outer insulation water-resistant layer 900, is composed of a polyolefin plastic layer with high flame retardance and better mechanical property and waterproof property, plays roles of mechanical protection, water resistance and flame retardance when the cable runs, and is used for improving the safety and reliability of the power cable.
As an example, when the material constituting the outer layer 1000 is specifically provided, a halogen-free low-smoke polyolefin flame-retardant sheath material or a flame-retardant polyethylene sheath material may be preferably used.
According to the coaxial waterproof power cable provided by the invention, through the arrangement of the waterproof structures of the semiconductive water-blocking layer 120, the inner semiconductive water-blocking buffer layer 300, the middle semiconductive water-blocking buffer layer 600 and the outer insulating water-blocking layer 900, gaps among the structures of the cable are all filled with waterproof materials, the inner insulating layer 200, the middle insulating layer 500, the outer insulating layer 800 and the outer tegument layer 1000 are all polyolefin insulating layers, and the formed metal wire stranded layer 130, the middle conductor layer 400 and the outer conductor layer 700 in the inner conductor layer 100 are all formed metal wire stranded layer structures, so that the cable has better radial and longitudinal waterproof performance.
The coaxial waterproof power cable provided by the invention is characterized in that an inner insulating layer 200, an inner semiconductive buffer layer 300, a middle conductive layer 400, a middle insulating layer 500, a middle semiconductive buffer layer 600, an outer conductive layer 700, an outer insulating layer 800, an outer insulating waterproof layer 900 and an outer coating layer 1000 are sequentially arranged from inside to outside by taking an inner conductive layer 100 as the center of the cable, and the inner insulating layer 200, the inner semiconductive buffer layer 300, the middle conductive layer 400, the middle insulating layer 500, the middle semiconductive buffer layer 600, the outer conductive layer 700, the outer insulating layer 800, the outer insulating waterproof layer 900 and the outer coating layer 100 are of concentric structures by taking the inner conductive layer 100 as the center, so that the cable structure is stable and round and has a small outer diameter, and the coaxial waterproof power cable is formed.
The utility model provides a scheme has ensured that the metal casing when the main line core and consumer take place to insulate when bad appearing the electric leakage through setting up inner conductor layer 100, can not make the adult contact consumer yet and take place the electric shock accident, so set up and make the cable have higher fail safe nature.
The utility model provides a scheme has formed coaxial waterproof power cable with the concentric structure at inner conductor layer 100 as the center for the cable has that stable in structure is round and the external diameter is little, higher stretching resistance, is applicable to the higher place of safety requirement.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A coaxial waterproof power cable, comprising: the waterproof structure comprises an inner conductor layer, wherein the periphery of the inner conductor layer sequentially comprises an inner insulating layer, an inner semi-conductive water-blocking buffer layer, a middle conductor layer, a middle insulating layer, a middle semi-conductive water-blocking buffer layer, an outer conductor layer, an outer insulating water-blocking layer and an outer tegument from inside to outside; the inner insulating layer, the inner semi-conductive water-blocking buffer layer, the middle conductor layer, the middle insulating layer, the middle semi-conductive water-blocking buffer layer, the outer conductor layer, the outer insulating water-blocking layer and the outer tegument layer of the cable are all concentric structures taking the inner conductor layer as the center.
2. The coaxial waterproof power cable according to claim 1, wherein the inner conductor layer is a steel-cored shaped conductor comprising a round steel wire, a semi-conductive water-resistant layer and a shaped metal wire twisted layer, the semi-conductive water-resistant layer is longitudinally wrapped on the outer surface of the round steel wire, and the shaped metal wire twisted layer is longitudinally wrapped on the outer surface of the semi-conductive water-resistant tape.
3. The coaxial waterproof power cable according to claim 2, wherein the profiled metal wire lay is formed by stranding a plurality of profiled metal wires.
4. The coaxial waterproof power cable of claim 1, wherein the middle conductor layer and the outer conductor layer are each stranded from a plurality of shaped metal wires.
5. The coaxial waterproof power cable according to claim 1, wherein the inner insulating layer, the middle insulating layer, the outer insulating layer and the outer coating layer are all plastic layers made of polyolefin materials.
6. The coaxial waterproof power cable of claim 1, wherein the outer insulating and water-blocking layer is formed by lapping and overlapping insulating and water-blocking tapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020972097.3U CN212541999U (en) | 2020-06-01 | 2020-06-01 | Coaxial waterproof power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020972097.3U CN212541999U (en) | 2020-06-01 | 2020-06-01 | Coaxial waterproof power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212541999U true CN212541999U (en) | 2021-02-12 |
Family
ID=74545029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020972097.3U Active CN212541999U (en) | 2020-06-01 | 2020-06-01 | Coaxial waterproof power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212541999U (en) |
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2020
- 2020-06-01 CN CN202020972097.3U patent/CN212541999U/en active Active
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