CN-122025274-A - Overhead insulated cable with anti-icing coating

CN122025274ACN 122025274 ACN122025274 ACN 122025274ACN-122025274-A

Abstract

The invention relates to the technical field of crosslinked polyethylene insulated cables and discloses an overhead insulated cable with an anti-icing coating, which comprises a cable core, an inner shielding layer, an insulating layer, an outer shielding layer, an inner sheath, an armor layer and other conventional structures, wherein a driving assembly and an anti-icing outer sleeve assembly are arranged at equal intervals outside the overhead insulated cable, the driving assembly is driven by a fixed ring, a rotating ring and a miniature motor to drive a spiral twisting wire to be alternately tightened and loosened, so that the flexible twisting sleeve synchronously realizes radial peristaltic and circumferential bidirectional twisting, the outer wall of the flexible twisting sleeve is provided with a V-shaped axial twisting groove, the outer wall of the flexible twisting sleeve is coated with a compound anti-icing coating, the combined interface of an ice embryo and the surface of the cable can be damaged at the initial stage of forming an ice shell, a thin water film is rapidly discharged to block the icing core, the growth cycle of the ice layer is cut off from the source in cooperation with the hydrophobic ice-dispersing characteristic of the coating, the safety accident caused by large-scale ice-covering is effectively inhibited, and the running reliability of the overhead cable under the freezing rain and high-humidity low-temperature environment is improved.

Inventors

Zuo Xuanming
WANG ZIBING
FU GUOHUI
HAN XUEJIAN
WANG WEI

Assignees

锐洋集团东北电缆有限公司

Dates

Publication Date: 20260512
Application Date: 20260402

Claims (10)

1. The overhead insulated cable with the anti-icing coating is characterized by comprising a cable outer sheath and a cable core, wherein a plurality of groups of driving assemblies are distributed at equal intervals outside the cable outer sheath, each driving assembly comprises a fixed ring coaxially sleeved outside the cable outer sheath and fixedly connected with the cable outer sheath, the side of each fixed ring is fixedly connected with a ring edge, a rotating ring is coaxially arranged inside each ring edge, the rotating rings are connected with the ring edges in a rotating mode, an anti-icing outer sleeve assembly is wrapped outside the cable outer sheath, the anti-icing outer sleeve assemblies are arranged at intervals with the driving assemblies, each anti-icing outer sleeve assembly comprises a flexible twisted sleeve, one end of each flexible twisted sleeve is fixedly connected with the fixed ring in one group of driving assemblies, the other end of each flexible twisted sleeve is fixedly connected with the rotating ring in the adjacent driving assembly, when the rings rotate, the ends of the flexible twisted sleeves can be driven to twist, twisted wires are spirally wound on the periphery of the cable outer sheath, one end of each twisted wire is loosely connected with the corresponding rotating ring, and the other ends of the flexible twisted sleeves are alternately connected with the rotating rings in the adjacent driving assemblies, and the rotating rings are alternately connected with the rotating rings in the rotating mode, and the rotating assemblies are alternately connected with the rotating rings in the rotating mode.
2. The overhead insulated cable with the anti-icing coating according to claim 1, wherein a plurality of twisting grooves are formed in the outer wall of the flexible twisted sleeve at equal intervals, the twisting grooves are parallel to the axial direction of the flexible twisted sleeve, and the twisting grooves are spiral when the flexible twisted sleeve is twisted.
3. The aerial insulated cable with anti-icing coating according to claim 1, wherein the cross section of the stranding groove is V-shaped, and the depth-to-width ratio of the stranding groove is one to two.
4. The overhead insulated cable with the anti-icing coating according to claim 1, wherein the twisted wire is connected with the inner wall of the flexible twisted sleeve in a punctiform manner, namely, the twisted wire is fixedly connected with the inner wall of the flexible twisted sleeve only at a plurality of discrete positions along the length direction of the twisted wire, and the rest parts are not fixed relative to the inner wall of the flexible twisted sleeve.
5. The overhead insulated cable with the anti-icing coating according to claim 1, wherein a fixed shaft sleeve is sleeved in the rotating ring, the fixed shaft sleeve is fixedly connected with the cable outer sheath, a ball is rotatably connected to the outer wall of the fixed shaft sleeve, a bead groove is formed in the inner wall of the rotating ring, and the ball is in rolling connection with the inner portion of the bead groove.
6. The aerial insulated cable with the anti-icing coating of claim 1, wherein a sawtooth bar is fixedly connected to the bottom of the rotating ring, a micro gear is meshed with the bottom of the sawtooth bar, a micro motor is installed at the bottom of the fixed ring, and the output end of the micro motor is fixedly connected with the micro gear.
7. The overhead insulated cable with the anti-icing coating according to claim 1, wherein an inner shielding layer is wrapped on the outer portion of the cable core, an insulating layer is coaxially sleeved on the outer portion of the inner shielding layer, and an outer shielding layer is coaxially sleeved on the outer portion of the insulating layer.
8. The overhead insulated cable with the anti-icing coating of claim 7, wherein an inner sheath is coaxially sleeved outside the outer shielding layer, an armor layer is coaxially sleeved outside the inner sheath, and the armor layer is arranged inside the outer sheath of the cable.
9. The overhead insulated cable with the anti-icing coating of claim 1, wherein the outer wall of the flexible jacket is uniformly coated with the anti-icing coating, and the thickness of the anti-icing coating is set to be thirty to eighty micrometers.
10. The overhead insulated cable with the anti-icing coating, which is disclosed in claim 9, is characterized by comprising, by mass, 40-70 parts of polyurethane elastomer resin, 15-35 parts of fluorosilicone modified polyurethane, 5-15 parts of fluorine modified nano silicon dioxide, 2-8 parts of polysilazane, 1-5 parts of carbon fiber, 3-10 parts of wax emulsion, 8-20 parts of curing agent, 0.5-2 parts of leveling agent, 0.2-1 part of defoaming agent and 20-50 parts of solvent.

Description

Overhead insulated cable with anti-icing coating Technical Field The invention relates to the technical field of crosslinked polyethylene insulated cables, in particular to an overhead insulated cable with an anti-icing coating. Background In the early winter or early spring, when the temperature is reduced to 0 ℃ to-5 ℃, the air humidity is high and proper wind speed is accompanied, supercooled water drops adhere to the surface of the cable and can be quickly condensed into a compact ice layer. As the ice layer is continuously thickened, the mechanical load of the cable is firstly increased obviously, and when the weight of the ice coating exceeds the design bearing limit, the wire breakage, hardware damage and even tower dumping are directly caused; secondly, the dynamic characteristics of the wires can be changed by icing, sag can be greatly changed due to uneven icing of each gear distance, discharge accidents can be caused due to insufficient grounding distance, wire jump collision can be caused due to asynchronous icing falling of the upper and lower layers of wires, and inter-phase short circuit is caused; in addition, the insulator string is covered with ice to greatly reduce the insulating property, and ice flash faults are easily caused. These chain reactions caused by icing can eventually lead to large-area power failure, and bring serious losses to production and life. For an overhead cable which is static for a long time and has a smooth surface, even if the precipitation amount is not large in a freezing rain or high-humidity low-temperature environment, water is difficult to gather into large water drops with enough quality due to the action of surface tension, the large water drops roll off and are uniformly spread on an outer cable sheath in the form of an extremely thin liquid film, the thin water film is difficult to effectively separate because the cable does not have any active movement or disturbance, an initial ice shell is easy to form after the temperature drops to a freezing point, once the initial ice shell is formed, the surface roughness and wettability of the cable can be changed, the subsequent supercooled water drops are easier to strike, spread and freeze on the surface of the initial ice shell, the thickness of the ice layer is fast increased, the serious icing disaster is evolved, accidents such as wire overload, sag increase, galloping and even broken lines are caused, and the traditional coating or manual deicing means are difficult to effectively interfere in the initial ice layer accumulation stage. Disclosure of Invention The invention aims to solve the technical problems that in a freezing rain environment, a thin water film is difficult to drop due to surface tension of a static smooth overhead cable, an ice layer is rapidly increased due to the change of surface characteristics after icing, and serious accidents such as overload and galloping are finally caused, and the traditional overhead cable is difficult to effectively interfere in the initial stage. The overhead insulated cable comprises a cable outer sheath and a cable core, wherein a plurality of groups of driving assemblies are distributed at equal intervals outside the cable outer sheath, each driving assembly comprises a fixed ring sleeved outside the cable outer sheath in a coaxial mode, the fixed rings are fixedly connected with the cable outer sheath, the side of each fixed ring is fixedly connected with a ring edge, a rotating ring is coaxially arranged inside each ring edge, the rotating rings are connected with the ring edges in a rotating mode, an anti-icing outer sheath assembly is wrapped outside the cable outer sheath, the anti-icing outer sheath assembly is arranged at intervals with the driving assemblies, each anti-icing outer sheath assembly comprises a flexible twisted sleeve, one end of each flexible twisted sleeve is fixedly connected with the fixed ring in one group of driving assemblies, the other end of each flexible twisted sleeve is fixedly connected with the rotating ring in the adjacent driving assembly, when the rotating ring rotates, the end of each flexible twisted sleeve can be driven to twist, the flexible twisted sleeve is arranged between the cable outer sheath and the rotating ring in a rotating mode, and the flexible twisted sleeve is alternately connected with one end of the corresponding flexible twisted sleeve, and the other end of each flexible twisted sleeve is driven to rotate, and the flexible twisted sleeve is alternately and is connected with the rotating ring in the adjacent driving assembly. Preferably, the outer wall of the flexible twisted sleeve is provided with a plurality of twisted grooves at equal intervals, the trend of the twisted grooves is parallel to the axial direction of the flexible twisted sleeve, and when the flexible twisted sleeve is twisted, the twisted grooves are spiral. Preferably, the cross section of the stranding groove is V-shaped, an