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CN-120545000-B - Steel-cored aluminum strand polyethylene insulation overhead cable

CN120545000BCN 120545000 BCN120545000 BCN 120545000BCN-120545000-B

Abstract

The invention discloses a steel-cored aluminum stranded wire polyethylene insulated overhead cable, which belongs to the technical field of cables and comprises an outer sheath, wherein an outer protection mechanism is arranged on the inner side of the outer sheath, an antifreezing mechanism is arranged on the outer side of the outer protection mechanism, seven rows of strip-shaped hollow air bags are uniformly arranged in the outer protection mechanism along the axial direction of the outer sheath, the strip-shaped hollow air bags in two adjacent rows are distributed in a staggered manner, and an inner protection mechanism is arranged on the inner side of the outer protection mechanism. According to the invention, the anti-freezing mechanism is arranged on the rubber layer, the strip-shaped heat conducting strip is positioned at the bottom of the inner side of the outer jacket of the overhead cable, and the carbon fiber heating wire is matched with the strip-shaped heat conducting strip to carry out ice melting treatment on the hung ice positioned at the bottom of the outer side of the outer jacket in a targeted manner, so that the self load of the overhead cable is not excessively increased, and the effect of heating and deicing the outer side of the overhead cable can be realized.

Inventors

  • WANG FABO

Assignees

  • 中缆线缆(天津)有限公司

Dates

Publication Date
20260508
Application Date
20250702

Claims (7)

  1. 1. The steel-cored aluminum stranded wire polyethylene insulated overhead cable comprises an outer sheath (1) and is characterized in that an outer layer protection mechanism (2) is arranged on the inner side of the outer sheath (1), an anti-freezing mechanism (3) is arranged on the outer side of the outer layer protection mechanism (2), seven rows of strip-shaped hollow air bags (4) are uniformly arranged in the outer layer protection mechanism (2) along the axial direction of the outer sheath (1), the strip-shaped hollow air bags (4) in two adjacent rows are distributed in a staggered mode, an inner layer protection mechanism (5) is arranged on the inner side of the outer layer protection mechanism (2), a cable core main body (6) is arranged on the inner side of the inner layer protection mechanism (5), and an anti-adhesion mechanism (7) is arranged on the outer side of the outer sheath (1); The outer layer protection mechanism (2) comprises a rubber layer (201) positioned at the inner side of the outer sheath (1), eight groups of reinforcing steel wires (202) are uniformly arranged in the rubber layer (201) along the axial direction of the outer sheath (1), a limit mechanism (8) is jointly arranged at the inner side of the outer sheath (1) and the outer side of the rubber layer (201), and the strip-shaped hollow air bag (4) is positioned in the rubber layer (201); The anti-freezing mechanism (3) comprises a strip-shaped groove (301) arranged on the outer side of the rubber layer (201), a strip-shaped heat conducting fin (302) matched with the strip-shaped groove is arranged in the strip-shaped groove (301), carbon fiber heating wires (303) are arranged on one surface, close to each other, of the strip-shaped heat conducting fin (302) and the strip-shaped groove (301), and the strip-shaped heat conducting fin (302) is located at the bottom position on the outer side of the outer sheath (1); Anti-adhesion mechanism (7) are including first arch (701) and second arch (702), outer sheath (1) outside is evenly provided with first arch (701) and second arch (702) respectively along outer sheath (1) axial direction, and first arch (701) and second arch (702) are interval distribution, the height of first arch (701) is higher than second arch (702), first arch (701) and second arch (702) are located the position department that is close to bar conducting strip (302) in outer sheath (1) outside.
  2. 2. The steel-cored aluminum strand polyethylene insulation overhead cable according to claim 1, wherein the cross section of the strip-shaped heat conducting fin (302) is arc-shaped, and a placing groove matched with the carbon fiber heating wire (303) is formed in the surface, close to each other, of the strip-shaped heat conducting fin (302) and the strip-shaped groove (301).
  3. 3. The steel-cored aluminum strand polyethylene insulated overhead cable according to claim 1, wherein the inner layer protection mechanism (5) comprises a shielding layer (501) positioned on the inner side of the rubber layer (201), a flame retardant layer (502) is arranged on the inner side of the shielding layer (501), a crosslinked polyethylene layer (503) is arranged on the inner side of the flame retardant layer (502), and an insulating layer (504) is arranged on the inner side of the crosslinked polyethylene layer (503).
  4. 4. A steel-cored aluminium stranded polyethylene insulated overhead cable according to claim 3, characterized in that the cable core body (6) comprises a first aluminium stranded wire layer (601) located inside an insulating layer (504), a second aluminium stranded wire layer (602) is arranged inside the first aluminium stranded wire layer (601), a steel core (603) is arranged inside the second aluminium stranded wire layer (602), and a conductor wrapping tape (9) wrapping the steel core (603) is arranged inside the insulating layer (504).
  5. 5. The steel-cored aluminum strand polyethylene insulated overhead cable according to claim 1, wherein the outer sides of the first protrusion (701) and the second protrusion (702) are both provided with a water-repellent layer, and the first protrusion (701) and the second protrusion (702) are hollow structures.
  6. 6. The steel-cored aluminum strand polyethylene insulated overhead cable according to claim 1, wherein the first protrusion (701) and the second protrusion (702) are both of a quadrangular pyramid structure, a space between the first protrusion (701) and the second protrusion (702) is 8-15mm, a height difference between the first protrusion (701) and the second protrusion (702) is 30% -50%, and a taper angle of the first protrusion (701) and the second protrusion (702) is 45 ° -60 °.
  7. 7. The steel-cored aluminum stranded wire polyethylene insulated overhead cable according to claim 1, wherein the limiting mechanism (8) comprises a plurality of groups of annular rubber protrusions (802) which are uniformly distributed on the inner side of the outer sheath (1), and a plurality of groups of annular grooves (801) which are matched with the annular rubber protrusions (802) are uniformly formed on the outer sides of the rubber layer (201) and the strip-shaped heat conducting fins (302) together.

Description

Steel-cored aluminum strand polyethylene insulation overhead cable Technical Field The invention belongs to the technical field of cables, and particularly relates to a steel-cored aluminum stranded wire polyethylene insulation overhead cable. Background Because the overhead cable needs to bear tension and transmit current, the overhead cable has good mechanical property and electrical property, taking the most common steel-cored aluminum stranded wire overhead cable as an example, the steel stranded wire has high mechanical strength and poor electrical conductivity, so that the overhead cable mainly bears mechanical load, the aluminum stranded wire has lower mechanical property and good electrical conductivity, so that the overhead cable mainly transmits electric energy, and because of the skin effect of alternating current, the current prefers to be concentrated on the surface of a conductor, so that the steel stranded wire is arranged inside and the aluminum stranded wire is arranged outside. In the practical application of the steel-cored aluminum stranded wire polyethylene insulated overhead cable, the traditional overhead cable structure is prone to excessive sagging phenomenon when facing large-span overhead or self gravity, so that the line attractiveness is affected, potential safety hazards are possibly caused, the bottom of the outer side of the steel-cored aluminum stranded wire polyethylene insulated overhead cable tends to gradually hang ice in cold weather, the load of the cable is greatly increased along with continuous weight increase of the hung ice, the breakage of the overhead cable is easily caused, the existing overhead cable is provided with a heating structure, the cable is often fully wrapped to achieve the effect of guaranteeing heating and deicing, the load of the cable is greatly increased, a large amount of water drops are easily attached to the outer side of the existing steel-cored aluminum stranded wire polyethylene insulated overhead cable, the load of the cable in rainy days is easily increased, and the ice hanging amount of the overhead cable in frosty weather is easily increased. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a steel-cored aluminum stranded wire polyethylene insulation overhead cable. The technical scheme for solving the technical problems is that the steel-cored aluminum stranded wire polyethylene insulated overhead cable comprises an outer sheath, wherein an outer protection mechanism is arranged on the inner side of the outer sheath, an anti-freezing mechanism is arranged on the outer side of the outer protection mechanism, seven rows of strip-shaped hollow air bags are uniformly arranged in the outer protection mechanism along the axial direction of the outer sheath, the strip-shaped hollow air bags are distributed in a staggered mode between two adjacent rows of strip-shaped hollow air bags, an inner layer protection mechanism is arranged on the inner side of the outer protection mechanism, a cable core main body is arranged on the inner side of the inner layer protection mechanism, and an anti-adhesion mechanism is arranged on the outer side of the outer sheath. Further, the outer protection mechanism comprises a rubber layer positioned on the inner side of the outer sheath, eight groups of reinforcing steel wires are uniformly arranged in the rubber layer along the axial direction of the outer sheath, a limiting mechanism is commonly arranged on the inner side of the outer sheath and the outer side of the rubber layer, and the strip-shaped hollow air bag is positioned in the rubber layer. Through above-mentioned technical scheme, utilize the reinforcing steel wire can further improve the axial stretch-proofing ability of whole cable, and the inside on rubber layer evenly sets up seven crisscross bar hollow air bags that distribute of row, forms the bearing structure of similar "honeycomb", and when the cable sagged by gravity, the structure of bar hollow air bag can provide radial holding power. Further, the mechanism prevents frostbite is including being located the bar recess of seting up in the rubber layer outside, the inside of bar recess be provided with rather than the bar conducting strip of looks adaptation, and the one side that bar conducting strip and bar recess are close to each other is provided with carbon fiber heater strip jointly, the bar conducting strip is located the bottom position in the oversheath outside. Through above-mentioned technical scheme, utilize carbon fiber heater strip to heat bar conducting strip, carry out the deicing processing to the string of ice that is located the oversheath outside bottom through bar conducting strip pertinently, can not too increase overhead cable's self heavy burden, can realize carrying out the effect of heating deicing to the overhead cable outside again. Further, the cross section of bar conducting strip is the arc shape, the standing