CN220913945U - 27.5KV lead sheath power cable - Google Patents
27.5KV lead sheath power cable Download PDFInfo
- Publication number
- CN220913945U CN220913945U CN202322386540.5U CN202322386540U CN220913945U CN 220913945 U CN220913945 U CN 220913945U CN 202322386540 U CN202322386540 U CN 202322386540U CN 220913945 U CN220913945 U CN 220913945U
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- Prior art keywords
- sheath
- lead
- shielding layer
- power cable
- layer
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- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 31
- 239000004020 conductor Substances 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 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
- 230000005611 electricity Effects 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 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
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model provides a 27.5kV lead sheath power cable, which relates to the technical field of power cables and comprises a wire core conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer, wherein two layers of non-woven fabrics are wrapped outside the insulating shielding layer, an inner sheath is arranged outside the non-woven fabrics, a lead sheath is arranged on the outer surface of the inner sheath, and an outer sheath is arranged on the outer surface of the lead sheath; and secondly, the whole cable has good corrosion resistance and ageing resistance, and can play a role in eliminating the shielding effect of the surface potential of the power cable, so that the service performance of the cable is further improved, and the cable is suitable for underground and chemical saline-alkali acid environments.
Description
Technical Field
The utility model relates to the technical field of power cables, in particular to a 27.5kV lead sheath power cable.
Background
A 27.5kV power cable, which is a cable for medium voltage power transmission and distribution systems, having a rated voltage of 27.5 kilovolts (kV), is widely used in power plants, substations, railways, industrial and mining enterprises, etc., for transmitting electric power from the power plants to users in different places;
The existing 27.5kV power cable for railways is usually made of aluminum, steel wire armor or polyvinyl chloride (PVC) and the like, and the structure of the cable is usually composed of a conductor, an insulating layer, a shielding layer and a sheath from inside to outside, and the cable with the structure has poor waterproof capability, is not excellent enough in corrosion resistance and ageing resistance, and is easy to infiltrate into water and moisture after long-time use, so that the protective performance is reduced.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a 27.5kV lead sheath power cable, which solves the problems of the prior art.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the 27.5kV lead sheath power cable comprises a wire core conductor and further comprises a conductor shielding layer arranged outside the wire core conductor, wherein an insulating layer is wrapped on the outer surface of the conductor shielding layer, and an insulating shielding layer is arranged on the outer side of the insulating layer;
The outside parcel of insulating shielding layer has two-layer non-woven fabrics, the outside of non-woven fabrics is provided with the inner sheath, and the surface of inner sheath is provided with plumbous sheath, the surface of plumbous sheath is provided with the oversheath.
As a further technical scheme of the utility model, a copper wire shielding layer is arranged between two layers of non-woven fabrics, wherein one layer of non-woven fabrics is wrapped on the outer surface of the insulating shielding layer, and the other layer of non-woven fabrics is wrapped on the outer surface of the copper wire shielding layer.
As a further aspect of the present utility model, the nonwoven fabric is a semiconductor nonwoven fabric tape, and the nonwoven fabric has a size of 1.0×0.2×60mm.
As a further technical scheme of the utility model, the inner sheath is made of polyethylene and has the thickness of 2.3-2.5mm, the outer sheath is a low-smoke halogen-free flame-retardant polyolefin sheath, and the thickness of the outer sheath is 3mm.
As a further technical scheme of the utility model, the lead sheath is a lead armor layer, the thickness of the lead sheath is 1.2-1.5mm, and a glass fiber belt is arranged between the lead sheath and the inner sheath.
The utility model provides a 27.5kV lead sheath power cable, which has the following beneficial effects compared with the prior art:
according to the 27.5kV lead sheath power cable, the inner sheath and the outer sheath are matched with the lead sheath, so that the overall waterproof performance of the cable can be improved, the cable is completely waterproof, invasion of water and moisture can be reliably prevented, and the sealing performance is good;
And secondly, the whole corrosion resistance and ageing resistance of the cable are good, and the shielding effect of eliminating the surface potential of the power cable can be achieved by utilizing the matched application of the conductor shielding layer, the insulating shielding layer and the copper wire shielding layer, and meanwhile, the power line can be restrained and the induced electricity can be eliminated, so that the service performance of the cable is further improved, and the cable is suitable for underground and chemical saline-alkali acid environments.
Drawings
FIG. 1 is a schematic diagram of a 27.5kV lead jacketed power cable;
Fig. 2 is a cross-sectional view of a 27.5kV lead jacketed power cable.
In the figure: 1. a core conductor; 2. a conductor shielding layer; 3. an insulating layer; 4. an insulating shielding layer; 5. a nonwoven fabric; 6. a copper wire shielding layer; 7. an inner sheath; 8. a lead sheath; 9. an outer sheath.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, the utility model provides a technical scheme of a 27.5kV lead sheath power cable: the 27.5kV lead sheath power cable comprises a wire core conductor 1 and further comprises a conductor shielding layer 2 arranged outside the wire core conductor 1, wherein the thickness of the conductor shielding layer 2 is 0.2mm, an insulating layer 3 is wrapped on the outer surface of the conductor shielding layer 2, the insulating layer 3 is made of crosslinked polyethylene, the thickness is 11mm, the heat resistance and the insulating performance are good, the cable cannot be decomposed or carbonized below 200 ℃, the long-term working temperature can reach 90 ℃, an insulating shielding layer 4 is arranged on the outer side of the insulating layer 3, and the insulating shielding layer 4 is a semiconductive polymer;
The outside parcel of insulating shield layer 4 has two-layer non-woven fabrics 5, be provided with copper wire shielding layer 6 between the two-layer non-woven fabrics 5, wherein one deck non-woven fabrics 5 (be inlayer non-woven fabrics promptly) parcel is at the surface of insulating shield layer 4, copper wire shielding layer 6 parcel is in the outside of inlayer non-woven fabrics, another layer non-woven fabrics 5 (be outer non-woven fabrics promptly) parcel is at the surface of copper wire shielding layer 6, non-woven fabrics 5 is the semiconductor non-woven fabrics area, and the size of non-woven fabrics 5 is 1.0x0.2x60 mm, utilize copper wire shielding layer 6 can play the shielding effect of eliminating power cable surface potential, can tie the power line and eliminate the faradism.
The outer part of the non-woven fabric 5 is provided with an inner sheath 7, the inner sheath 7 is wrapped outside the outer non-woven fabric, the inner sheath 7 is made of polyethylene, the thickness is 2.3-2.5mm, the outer surface of the inner sheath 7 is provided with a lead sheath 8, the lead sheath 8 is a lead armor layer, the thickness of the lead sheath 8 is 1.2-1.5mm, and a glass fiber belt is arranged between the lead sheath 8 and the inner sheath 7; the outer surface of the lead sheath 8 is provided with the outer sheath 9, the outer sheath 9 is a low-smoke halogen-free flame-retardant polyolefin sheath, the thickness of the outer sheath 9 is 3mm, and lead armor is designed between the inner sheath 7 and the outer sheath 9, so that the waterproof performance, corrosion resistance and ageing resistance of the cable can be improved, other sheaths cannot be damaged due to overheating in the process of manufacturing the lead sheath 8 due to low melting point of lead, and the lead can be extruded into a closed sheath in a semi-liquid state at about 200 ℃.
The designed cable adopts the application of the inner sheath 7 and the outer sheath 9 matched with the lead sheath 8, can improve the overall waterproof performance of the cable, has complete impermeability, can reliably prevent the invasion of water and moisture, and has good sealing performance;
Secondly, the whole cable has good corrosion resistance and ageing resistance, is suitable for underground and chemical industry saline-alkali acid environments, and is more superior when being used in railways;
Meanwhile, the conductor shielding layer 2, the insulating shielding layer 4 and the copper wire shielding layer 6 are used in a matched mode, so that the shielding effect of eliminating the surface potential of the power cable can be achieved, and meanwhile, the binding of the power line and the elimination of induced electricity can be achieved.
Claims (5)
1. The 27.5kV lead sheath power cable comprises a wire core conductor (1), and is characterized by further comprising a conductor shielding layer (2) arranged outside the wire core conductor (1), wherein an insulating layer (3) is wrapped on the outer surface of the conductor shielding layer (2), and an insulating shielding layer (4) is arranged on the outer side of the insulating layer (3);
the outside parcel of insulating shielding layer (4) has two-layer non-woven fabrics (5), the outside of non-woven fabrics (5) is provided with inner sheath (7), and the surface of inner sheath (7) is provided with plumbous sheath (8), the surface of plumbous sheath (8) is provided with oversheath (9).
2. A 27.5kV lead jacketed power cable according to claim 1, characterized in that a copper wire shielding layer (6) is arranged between two non-woven fabrics (5), wherein one non-woven fabric (5) is wrapped on the outer surface of the insulating shielding layer (4), and the other non-woven fabric (5) is wrapped on the outer surface of the copper wire shielding layer (6).
3. A 27.5kV lead jacketed power cable according to claim 1, characterized in that the non-woven fabric (5) is a semiconducting non-woven fabric tape, and the size of the non-woven fabric (5) is 1.0 x 0.2 x 60mm.
4. A 27.5kV lead jacketed power cable according to claim 1, characterized in that the inner jacket (7) is made of polyethylene, the thickness is 2.3-2.5mm, the outer jacket (9) is a low smoke halogen-free flame retardant polyolefin jacket, and the thickness of the outer jacket (9) is 3mm.
5. A 27.5kV lead jacketed power cable according to claim 1, characterized in that the lead jacket (8) is a lead armour layer, and the thickness of the lead jacket (8) is 1.2-1.5mm, and a glass fiber tape is also arranged between the lead jacket (8) and the inner jacket (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322386540.5U CN220913945U (en) | 2023-09-04 | 2023-09-04 | 27.5KV lead sheath power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322386540.5U CN220913945U (en) | 2023-09-04 | 2023-09-04 | 27.5KV lead sheath power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220913945U true CN220913945U (en) | 2024-05-07 |
Family
ID=90914919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322386540.5U Active CN220913945U (en) | 2023-09-04 | 2023-09-04 | 27.5KV lead sheath power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220913945U (en) |
-
2023
- 2023-09-04 CN CN202322386540.5U patent/CN220913945U/en active Active
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