CN213519333U - Waterproof multicore power cable - Google Patents
Waterproof multicore power cable Download PDFInfo
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- CN213519333U CN213519333U CN202022572212.0U CN202022572212U CN213519333U CN 213519333 U CN213519333 U CN 213519333U CN 202022572212 U CN202022572212 U CN 202022572212U CN 213519333 U CN213519333 U CN 213519333U
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- sheath
- insulating layer
- power cable
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- waterproof
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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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Abstract
The utility model discloses a waterproof multicore power cable is formed by a plurality of single core cable transposition, including conductor, semiconduction waterproofing area, insulating layer, composite band and sheath, the crowded package insulating layer in the conductor outside, the insulating layer outside is around the package semiconduction waterproofing area, and the longitudinal wrapping in the semiconduction waterproofing area outside is indulged in the composite band, and the crowded package of sheath is in the composite band outside. The utility model has the advantages that: 1. through the design of the semiconductive water-blocking tape, the cable can keep stable performance at the instant high temperature; 2. through the sheath with strong weather resistance and weak hydrophilicity, the cable can be prevented from being damaged by abrasion caused by outdoor environment, and the water resistance can be improved.
Description
Technical Field
The utility model belongs to the technical field of the cable technique and specifically relates to a waterproof multicore power cable is related to.
Background
With the rapid development of national economy, especially the construction and reconstruction of urban and rural power networks and the continuous development of the land industry of various regions, the power industry of China is rapidly developed, especially the development of the wire and cable industry, and the variety development of the wire and cable presents a diversified trend. At present, crosslinked polyethylene insulated three-core cables of 35kV and below are directly buried or arranged in an air pipeline in design and laying, and when the cables are arranged in the directly buried or air pipeline, air is not circulated, so that the current-carrying capacity of the cables is influenced by heating of the cables, and waterproof measures are lacked.
For example, in a high-strength waterproof cable and a preparation method thereof disclosed in chinese patent publication No. CN108335798A, a foamed aluminum layer is provided in the structure, and hydrophobic coatings are provided on both sides of the foamed aluminum layer, so that the waterproof performance of the cable is greatly improved.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the heating current-carrying capacity of the multi-core cable is easy to be influenced, and a waterproof multi-core power cable is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who takes as follows:
a waterproof multi-core power cable is formed by stranding a plurality of single-core cables and comprises a conductor, a semi-conductive water-blocking tape, an insulating layer, a composite tape and a sheath, wherein the insulating layer is extruded outside the conductor, the semi-conductive water-blocking tape is wrapped outside the insulating layer, the composite tape is longitudinally wrapped outside the semi-conductive water-blocking tape, and the sheath is extruded outside the composite tape. The semiconductive water-blocking tape has the characteristics of strong hygroscopicity, large expansion rate, high expansion rate, small resistance, semiconductive property, good heat resistance, high instant temperature resistance and stable performance of the cable at instant high temperature; the sheath adopts the material that hydrophilicity is weak, can effectively block water.
Preferably, the cable further includes a conductor shield layer fixed between the conductor and the insulating layer and in contact with the conductor.
Preferably, the waterproof tape further comprises an insulating shielding layer, and the insulating shielding layer is fixed between the insulating layer and the semiconductive water blocking tape. The insulating shielding layer adopts a water-blocking rope, and when moisture invades into the water-blocking rope, the high polymer material expands to tightly fill the gap inside the sheath to form a water-blocking dam to prevent the moisture from further permeating.
Preferably, the coating layer is coated on the outer surface of the sheath. The coating layer is composed of vinyl resin, butylene resin, propylene resin or silicon resin, and can effectively block water.
Preferably, the insulating layer is a three-layer co-extrusion water tree-resistant insulating layer. The water tree-resistant insulating layer can reduce the water tree-shaped tissue generated by water and electricity aging.
Preferably, the composite tape is a single-layer aluminum-plastic composite tape.
Preferably, the jacket is a weatherable linear low density polyethylene jacket. The weather-resistant linear low-density polyethylene sheath can prevent comprehensive damage caused by illumination, cold and hot, wind and rain, bacteria and the like outdoors, has poor hydrophilicity, and can improve the waterproof performance of the cable.
The utility model has the advantages that: 1. through the design of the semiconductive water-blocking tape, the cable can keep stable performance at the instant high temperature; 2. through the sheath with strong weather resistance and weak hydrophilicity, the cable can be prevented from being damaged by abrasion caused by outdoor environment, and the water resistance can be improved.
Drawings
Fig. 1 is a cross-sectional view of a power cable according to an embodiment.
Wherein: the cable comprises a conductor 1, a conductor 2, a conductor shielding layer 3, an insulating layer 4, an insulating shielding layer 5, a semiconductive water blocking tape 6, a single-sided aluminum-plastic composite tape 7 and a weather-resistant linear low-density polyethylene sheath 7.
Detailed Description
The following further describes the embodiments of the present invention by means of specific examples, in conjunction with the accompanying drawings.
The first embodiment is as follows:
a waterproof multi-core power cable is formed by stranding a plurality of single-core cables as shown in figure 1, and comprises a conductor 1, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4, a semi-conductive water blocking tape 5, a single-sided aluminum-plastic composite tape 6 and a weather-resistant linear low-density polyethylene sheath 7.
An insulating layer 3 is extruded on the outer side of the conductor 1, a semi-conductive water-blocking tape 5 is wrapped on the outer side of the insulating layer 3, the composite tape is longitudinally wrapped on the outer side of the semi-conductive water-blocking tape 5, and a sheath is extruded on the outer side of the composite tape. The semi-conductive water-blocking tape 5 has the characteristics of strong hygroscopicity, large expansion rate, high expansion rate, small resistance, semi-conductive property, good heat resistance and high instant temperature resistance, and the cable can keep stable performance at instant high temperature; the sheath adopts the material that hydrophilicity is weak, can effectively block water.
The conductor shield layer 2 is fixed between the conductor 1 and the insulating layer 3 and abuts against the conductor 1.
The waterproof structure further comprises an insulating shielding layer 4, and the insulating shielding layer 4 is fixed between the insulating layer 3 and the semi-conductive water blocking tape 5. The insulating shielding layer 4 adopts a water-blocking rope, and when water invades into the water-blocking rope, the high polymer material expands to tightly fill the gap inside the sheath to form a water-blocking dam to prevent the further permeation of the water.
Still include the dope layer, the dope layer coats in the sheath surface. The coating layer is composed of vinyl resin, butylene resin, propylene resin or silicon resin, and can effectively block water.
The insulating layer 3 is a three-layer co-extrusion water tree resistant insulating layer 3. The water tree-resistant insulating layer 3 can reduce the water tree-like structure generated by hydroelectric aging.
The composite belt is a single-layer aluminum-plastic composite belt.
The sheath is a weather-proof linear low-density polyethylene sheath 7. The weather-resistant linear low-density polyethylene sheath 7 can prevent comprehensive damage caused by illumination, cold and hot, wind and rain, bacteria and the like outdoors, has poor hydrophilicity, and can improve the waterproof performance of the cable.
The utility model has the advantages that: 1. through the design of the semi-conductive water-blocking tape 5, the cable can keep stable performance at the instant high temperature; 2. through the sheath with strong weather resistance and weak hydrophilicity, the cable can be prevented from being damaged by abrasion caused by outdoor environment, and the water resistance can be improved.
The above embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the technical scope of the claims.
Claims (7)
1. A waterproof multi-core power cable is characterized by being formed by twisting a plurality of single-core cables and comprising a conductor, a semi-conductive water-blocking tape, an insulating layer, a composite tape and a sheath, wherein the insulating layer is extruded outside the conductor, the semi-conductive water-blocking tape is wrapped outside the insulating layer, the composite tape is longitudinally wrapped outside the semi-conductive water-blocking tape, and the sheath is extruded outside the composite tape.
2. The watertight multi-core power cable of claim 1, further comprising a conductor shield secured between and abutting the conductor and the insulation layer.
3. The waterproof multi-core power cable of claim 1, further comprising an insulating shield layer secured between the insulating layer and the semi-conductive water blocking tape.
4. The waterproof multi-core power cable of claim 1 or 2, further comprising a coating layer applied to the outer surface of the sheath.
5. The waterproof multicore power cable of claim 1 or 3, wherein the insulating layer is a three-layer co-extruded water tree-resistant insulating layer.
6. The waterproof multi-core power cable of claim 1, wherein the composite tape is a single layer aluminum plastic composite tape.
7. The waterproof multicore power cable of claim 1, wherein the sheath is a weatherable linear low density polyethylene sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022572212.0U CN213519333U (en) | 2020-11-09 | 2020-11-09 | Waterproof multicore power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022572212.0U CN213519333U (en) | 2020-11-09 | 2020-11-09 | Waterproof multicore power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213519333U true CN213519333U (en) | 2021-06-22 |
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ID=76422335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022572212.0U Active CN213519333U (en) | 2020-11-09 | 2020-11-09 | Waterproof multicore power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213519333U (en) |
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2020
- 2020-11-09 CN CN202022572212.0U patent/CN213519333U/en active Active
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