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CN-224232378-U - Crosslinked polyethylene insulation polyethylene sheath power cable

CN224232378UCN 224232378 UCN224232378 UCN 224232378UCN-224232378-U

Abstract

The utility model relates to a crosslinked polyethylene insulated polyethylene sheath power cable, which belongs to the technical field of power cables and comprises a cable conductor body, wherein a conductor protection layer is arranged outside the cable conductor body, an inner protection layer is arranged outside the conductor protection layer, and a stretching-resistant structure layer capable of improving the overall tensile strength of the cable is arranged inside the inner protection layer. This insulating polyethylene sheath power cable of crosslinked polyethylene through setting up the parcel layer, can wrap up a plurality of cable conductor bodies fixedly, avoids its loose condition to appear, and the rethread sets up the armor parcel layer, can make power cable bear great pulling force, plays good compressive property simultaneously, and the rethread sets up the metal sheath, can effectively shield the interference of external electric field and magnetic field, prevents that outside electromagnetic interference from producing the influence to the signal of electricity of cable internal transmission, guarantees the stable transmission of electric power or signal, further improves tensile resistance simultaneously.

Inventors

  • LI ENHAO
  • Lei Jingfen
  • HAN XIAOWEI

Assignees

  • 友惠线缆有限公司

Dates

Publication Date
20260512
Application Date
20250401

Claims (7)

  1. 1. The crosslinked polyethylene insulated polyethylene sheathed power cable comprises a cable conductor body (1) and is characterized in that a conductor protection layer (2) is arranged outside the cable conductor body (1), an inner protection layer (3) is arranged outside the conductor protection layer (2), and a tensile structure layer capable of improving the overall tensile strength of the cable is arranged inside the inner protection layer (3); The stretch-proofing structural layer is including setting up in outside parcel layer (31) of conductor protective layer (2), the outside of parcel layer (31) is provided with armor parcel layer (32), one side that parcel layer (31) was kept away from to armor parcel layer (32) is provided with buffer sheath (33), one side that armor parcel layer (32) was kept away from to buffer sheath (33) is provided with metal sheath (37).
  2. 2. The crosslinked polyethylene insulated polyethylene jacketed power cable of claim 1, wherein the buffer jacket (33) is fixedly connected with a reinforcing rib (34), and a buffer cavity (35) is formed in the buffer jacket (33).
  3. 3. A cross-linked polyethylene insulated polyethylene jacketed power cable according to claim 1, wherein the wrapping layer (31) abuts the outer surface of the conductor protective layer (2), the inner protective layer (3) comprises a tensile structural layer and a water-resistant layer (36), and the water-resistant layer (36) is located between the metal jacket (37) and the buffer jacket (33).
  4. 4. The crosslinked polyethylene insulated polyethylene jacketed power cable according to claim 1, wherein the conductor protective layer (2) comprises a conductor shielding layer (21), an insulating layer (22) and an insulating shielding layer (23), the conductor shielding layer (21) being in abutment with the cable conductor body (1).
  5. 5. A crosslinked polyethylene insulated polyethylene jacketed power cable according to claim 4, wherein the conductor shielding layer (21) is provided with an insulating layer (22) on the outside, and an insulating shielding layer (23) is provided on the side of the insulating layer (22) away from the conductor shielding layer (21).
  6. 6. The crosslinked polyethylene insulated polyethylene jacketed power cable according to claim 1, wherein an outer protective layer (4) is arranged outside the inner protective layer (3), and the outer protective layer (4) consists of a fireproof layer (41) and an outer protective sleeve (42).
  7. 7. A crosslinked polyethylene insulated polyethylene jacketed power cable according to claim 6, wherein the outer protective jacket (42) is located on the outermost layer of the outer protective layer (4), and the refractory layer (41) is in abutment with the inner protective layer (3).

Description

Crosslinked polyethylene insulation polyethylene sheath power cable Technical Field The utility model relates to the technical field of power cables, in particular to a crosslinked polyethylene insulated polyethylene sheath power cable. Background The power cable is a cable for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station outgoing lines, power supply in industrial and mining enterprises and power transmission lines under sea water passing through the river. In the electric power line, the proportion of the cable is gradually increasing. Power cables are cable products used in the main line of power systems to transmit and distribute high power electrical energy, including various voltage classes of 1-500kV and above, various insulated power cables. The Chinese patent publication No. CN213150450U discloses a crosslinked polyethylene insulated polyethylene sheathed power cable, which comprises three conductors, a first dry cotton layer and a shock absorption layer, wherein a semiconductive belt is arranged on one side of the periphery of the conductors, a conductive shielding layer is adhered on one side of the periphery of the semiconductive belt, an insulating layer is arranged on one side of the periphery of the conductive shielding layer, the first dry cotton layer is arranged on one side of the periphery of the insulating layer, an inner sheath is arranged on one side of the periphery of the first dry cotton layer, a wrapping belt is arranged on one side of the periphery of the inner sheath, and a filler is filled between the wrapping belt and the inner sheath. According to the utility model, the first and second dry cotton layers are arranged, so that the inner ring and the outer ring of the power cable can be protected from moisture, the double-layer protection is adopted, the moisture resistance of the power cable can be improved, the power cable is prevented from being affected with moisture, and the service life of the power cable is ensured. However, in the use process, the utility model only focuses on the moisture-proof and shock-proof protection of the power cable, but in the actual cable laying process, the cable is often stretched, so that the tensile strength of the cable is lower, and the production requirement cannot be met, so that the crosslinked polyethylene insulated polyethylene sheath power cable is provided to solve the problems. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a crosslinked polyethylene insulated polyethylene sheath power cable which has the advantage of high tensile strength, and solves the problems that the cable is only stressed on moisture-proof and shock-proof protection of the power cable, but the cable is often stretched in the actual cable laying process, so that the tensile strength of the cable is lower and the production requirement cannot be met. In order to achieve the above purpose, the utility model provides a cross-linked polyethylene insulated polyethylene sheath power cable, which comprises a cable conductor body, wherein a conductor protection layer is arranged outside the cable conductor body, an inner protection layer is arranged outside the conductor protection layer, and a stretching-resistant structural layer capable of improving the overall tensile strength of the cable is arranged inside the inner protection layer; The stretch-proofing structural layer is including setting up in the outside parcel layer of conductor protective layer, the outside of parcel layer is provided with the armor parcel layer, one side that the parcel layer was kept away from to the armor parcel layer is provided with buffer sheath, one side that the armor parcel layer was kept away from to buffer sheath is provided with metal sheath. Further, the inside fixedly connected with strengthening rib of buffering sheath, buffer cavity has been seted up to the inside of buffering sheath. Further, the wrapping layer is abutted against the outer surface of the conductor protection layer, the inner protection layer comprises a stretching-resistant structural layer and a water-resistant layer, and the water-resistant layer is located between the metal sheath and the buffer sheath. Further, the conductor protection layer comprises a conductor shielding layer, an insulating layer and an insulating shielding layer, and the conductor shielding layer is abutted against the cable conductor body. Further, an insulating layer is arranged outside the conductor shielding layer, and an insulating shielding layer is arranged on one side, far away from the conductor shielding layer, of the insulating layer. Further, an outer protective layer is arranged outside the inner protective layer, and the outer protective layer consists of a fireproof layer and an outer protective sleeve. Further, the outer protective sleeve is positioned on the outermost layer of the outer protecti