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CN-122025248-A - Anti-icing overhead insulated power cable

CN122025248ACN 122025248 ACN122025248 ACN 122025248ACN-122025248-A

Abstract

The invention discloses an anti-icing overhead insulated power cable applied to the field of power cables, which comprises a wire core, wherein a plurality of sections of insulating jackets are arranged on the outer side of the wire core, gas transmission pipelines and reinforced wire harnesses which are arranged at intervals are arranged between the wire core and the jackets, expansion rows matched with the gas transmission pipelines are arranged on the insulating jackets, jackets with gas flow regulating boxes are connected between adjacent jackets, ice layers are broken and fall off by intelligently regulating and controlling the gas flow temperature, the vibration frequency and the thermal shock intensity in real time, the anti-icing reliability and the intelligent management level of the cable are improved, efficient automatic anti-icing control is realized, the two groups of gas transmission pipelines are alternately inflated and exhausted, the thermal current is input, the expansion rows generate periodic mechanical vibration and thermal shock in a coordinated manner, an ice layer structure is damaged, and the adhesive force of the broken ice layer is reduced by combining a hydrophobic coating, so that the broken ice layer is easy to slide off from the surface of the inclined insulating jackets.

Inventors

  • CHU XI
  • Chu Anqiang

Assignees

  • 江苏宏佳电缆有限公司

Dates

Publication Date
20260512
Application Date
20260209

Claims (9)

  1. 1. An anti-icing overhead insulated power cable comprises a wire core (1), wherein a plurality of sections of insulating jackets (2) are arranged on the outer side of the wire core (1), and the anti-icing overhead insulated power cable is characterized in that a reinforced wire group surrounding the wire core (1) is arranged between the wire core (1) and the insulating jackets (2), the reinforced wire group comprises gas transmission pipes (3) and reinforced wire bundles (4) which are distributed at intervals, one end, facing the wire core (1), of the gas transmission pipes (3) is provided with a gas guide hole (301), and a flexible supporting layer (302) is filled in the gas transmission pipes (3); The insulation sheath (2) is fixedly connected with a plurality of expansion rows (5) matched with the gas transmission tube (3), each expansion row (5) comprises a plurality of gas transmission nails (51) penetrating through the insulation sheath (2) and inserted into the gas guide holes (301), elastic strips (52) attached to the surfaces of the insulation sheath (2) are connected between the top ends of the plurality of gas transmission nails (51), expansion cavities matched with the gas transmission nails (51) are formed in the elastic strips (52), guide holes communicated with the expansion cavities are formed in the gas transmission nails (51), one end of each gas transmission nail (51) inserted into each gas guide hole is provided with a gas inlet communicated with each guide hole, and a protective film (6) covering the plurality of expansion rows (5) is paved on the surface of the insulation sheath (2); The insulating sheath (2) is connected with a jacket between two adjacent sections, the jacket comprises a pair of clamping clips (7) which are clamped with each other, an air flow regulating box (8) is fixedly connected to the clamping clips (7), a flow guide pipe (702) communicated with the air transmission pipe (3) is connected to the inner ends of the clamping clips (7), a flow guide channel (701) used for the flow guide pipe (702) to be communicated with the air flow regulating box (8) is arranged in the clamping clips (7), and an electromagnetic flow valve is connected between the flow guide channel (701) and the air flow regulating box (8).
  2. 2. The anti-icing overhead insulated power cable according to claim 1, wherein the two groups of gas transmission pipes (3) are arranged, the two groups of gas transmission pipes (3) are alternately inflated and exhausted, and two adjacent expansion rows (5) along the axial direction of the cable main body core (1) are distributed in a staggered manner.
  3. 3. The anti-icing overhead insulated power cable according to claim 1, wherein the guide pipes (702) at the inner ends of the clamping members (7) are arranged in two groups at the front end and the rear end of the clamping members (7), and the two guide pipes (702) connected at the front end and the rear end of the expansion row (5) are respectively used for air intake and air exhaust.
  4. 4. The anti-icing overhead insulated power cable according to claim 1, wherein the reinforced wire harness (4) comprises a plurality of reinforced wires, detection wires are respectively arranged in the reinforced wire harness (4) and the flexible supporting layer (302) in a penetrating manner, a plurality of uniformly distributed temperature sensors are arranged on the detection wires, the detection wires on the reinforced wire harness (4) and the flexible supporting layer (302) are respectively used for detecting the temperature of a wire core and the temperature of air flow in the air guide hole (301), and the temperature and humidity sensors are arranged on the clamping clips (7).
  5. 5. The anti-icing overhead insulated power cable according to claim 4, wherein an air flow input pipe communicated with the diversion channel (701) is connected to the air flow regulating box (8), an air flow heater, a data acquisition unit and a communication unit are installed in the air flow regulating box (8), and detection lines in the reinforced wire harness (4) and the flexible supporting layer (302) are electrically connected with the data acquisition unit.
  6. 6. An ice protection overhead insulated power cable according to claim 1, characterized in that the gas line pipe (3) is made of a heat insulating material, the flexible support layer (302) is made of a flexible material, and a flame retardant layer is filled between the wire core (1) and the insulating sheath (2).
  7. 7. The anti-icing overhead insulated power cable according to claim 1, wherein the elastic strip (52) comprises a metal base strip attached to the surface of the insulating sheath (2), a rubber strip is fixedly connected to the metal base strip, the expansion cavity is formed in the rubber strip, and one end of the gas transmission nail (51) penetrates through the metal base strip and is inserted into the expansion cavity.
  8. 8. An ice protection overhead insulated power cable according to claim 1, characterized in that the surface of the protective film (6) is coated with a hydrophobic coating, the protective film (6) being bonded to the elastic strip (52) by an elastic adhesive.
  9. 9. An ice protection overhead insulated power cable according to any one of claims 1-8, further comprising an auxiliary protection system comprising a terminal processor in signal connection with a plurality of airflow regulating boxes (8), wherein the terminal processor is connected with a monitoring module, a data processing module, a control module and a data storage module; The monitoring module is used for collecting monitoring data of each insulating sheath (2) in real time, wherein the monitoring data comprise the ambient temperature and humidity, the temperature of the wire core (1) and the air flow temperature in the air guide hole (301) collected at the clamping part (7), and the collected data are transmitted to the terminal processor in real time; the data processing module is used for processing and analyzing the received monitoring data, setting the starting or closing of an anti-icing program, setting the parameters of each related device according to a preset program and providing a basis for the control module; The control module is used for sending out cooperative control instructions to each air flow regulating and controlling box 8 according to the processing result of the data processing module; The data storage module is used for storing historical data acquired by the monitoring module, analysis results of the data processing module, instruction records of the control module and system work logs.

Description

Anti-icing overhead insulated power cable Technical Field The invention relates to the field of power cables, in particular to an anti-icing overhead insulated power cable. Background The overhead power cable is an insulated cable erected on a pole tower for transmitting electric energy and consists of a conductor, an insulating layer, a shielding layer and a protective layer, wherein the conductor is mostly copper or aluminum alloy, and the insulating material is usually crosslinked polyethylene and has good electric insulation and mechanical strength. Compared with underground cables, the insulating layer of the overhead bare conductor can reduce short circuit risk, is suitable for complex environments such as cities, residential areas and the like, and has the advantages of low laying cost, convenience in construction, excellent air heat dissipation condition and stable current-carrying capacity. The invention CN106653218B discloses an antifreezing communication cable which comprises a conductor, a silicon tape, optical fibers and loose tubes, wherein the silicon tape is wound on the outer side of the conductor, the loose tubes are arranged on the outer side of the silicon tape at intervals, the loose tubes are distributed in an annular array, and the optical fibers are arranged in the loose tubes. Chinese invention CN120221172B discloses an anti-freezing cable, which can reduce adhesion of droplets and rainwater on the surface of the cable by using a hydrophobic material containing fluorine, and the hydrophilic gel and salt can reduce freezing points of the rainwater, reduce nucleation, freezing and agglomeration of droplets, reduce probability of freezing of the rainwater on the surface of the cable, and play a role in preventing freezing of the cable. Meanwhile, as the hydrophilic gel has the water absorption characteristic, when the temperature of the cable core is increased, water vapor absorbed by the inside of the hydrophilic gel can be evaporated at high temperature, so that heat is taken away, energy consumption is reduced, and the effect of cooling the cable is achieved. In the prior art, the overhead insulated power cable is extremely easy to freeze on the surface under the condition of low temperature and high humidity due to long-term exposure to the outdoor environment, the formation and accumulation of an ice layer not only can increase the mechanical load of the cable, so that the cable sags, deforms and even breaks, but also can reduce the insulation performance, and cause circuit faults such as short circuit, electric arc and the like, thereby seriously affecting the reliability of power transmission and the stability of a system, and the overhead cable in the prior art has no corresponding anti-icing measure. Disclosure of Invention The invention aims at solving the problem that the overhead insulated power cable is easy to freeze in a low-temperature high-humidity environment to cause line faults in the prior art by an intelligent cooperative airflow regulation and vibration thermal shock mechanism. Meanwhile, the intelligent dynamic response and high-efficiency protection of cable ice prevention are realized. In order to solve the problems, the invention adopts the following technical scheme. The anti-icing overhead insulated power cable comprises a wire core, wherein a plurality of sections of insulating jackets are arranged on the outer side of the wire core, a reinforced wire group surrounding the wire core is arranged between the wire core and the insulating jackets, and the reinforced wire group comprises gas transmission pipes and reinforced wire bundles which are arranged at intervals; The insulation sheath is fixedly connected with a plurality of expansion rows matched with the gas transmission tube, each expansion row comprises a plurality of gas transmission nails penetrating through the insulation sheath and inserted into the gas guide holes, elastic strips attached to the surfaces of the insulation sheath are connected between the top ends of the plurality of gas transmission nails, expansion cavities matched with the gas transmission nails are formed in the elastic strips, the gas transmission nails are provided with guide holes communicated with the expansion cavities, one end of each gas transmission nail inserted into the gas guide hole is provided with a gas inlet communicated with the corresponding guide hole, and the surface of the insulation sheath is paved with a protective film covering the plurality of expansion rows; The jacket comprises a pair of clamps which are clamped with each other, an air flow regulating box is fixedly connected to the clamps, a flow guide pipe communicated with the air transmission pipe is connected to the inner ends of the clamps, a flow guide channel used for communicating the flow guide pipe with the air flow regulating box is arranged in the clamps, and an electromagnetic flow valve is connected between the flow guide channel and t