CN210403320U

CN210403320U - Weather-resistant insulated overhead cable

Info

Publication number: CN210403320U
Application number: CN201921532882.0U
Authority: CN
Inventors: 刘永伟; 贺云芳; 马建平; 张镇球
Original assignee: Wuxi New Sunshine Cable Co ltd
Current assignee: Wuxi New Sunshine Cable Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-04-24
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a weather-resistant insulated overhead cable, which comprises a cable core, wherein the cable core is formed by stranding a plurality of weather-resistant insulated wire cores; fill after resistant sealed glue of waiting at the space department of cable core and wind package polyester fiber ribbon, wind the package outside the polyester fiber ribbon and strengthen the inner sheath, wind the package second E-PVC S-PVC compound outside the enhancement inner sheath and wash the epoxy ceramic dope layer that screen cloth back coating thickness is 0.2-0.3mm that sinks, wind package PTFE glass fiber high temperature cloth outside epoxy ceramic dope layer, establish resistant constant temperature sheath of waiting at PTFE glass fiber high temperature cloth overcoat. The utility model discloses have high tear strength, elongation at break, tensile strength, weatherability, corrosion resisting property.

Description

Weather-resistant insulated overhead cable

Technical Field

The utility model relates to a wire and cable field, concretely relates to insulating aerial [ insulated ] cable of weatherability.

Background

With the continuous development of the scale of the power distribution network, faults such as short circuit, disconnection, external force damage, single-phase grounding and the like occur continuously, wherein the external force damage is the most. The power supply reliability of the power distribution network not only influences the production and the electricity consumption of enterprises and the life of residents, but also influences the quality and the social benefits of the electricity consumption. In order to reduce the number of power distribution network accidents and narrow the range of power distribution accidents, underground cables or overhead insulated cables are generally adopted.

With the wide application of the overhead insulated cable, the quality requirement of the cable is continuously improved. The common overhead insulated cable is used for power transmission in cities, rural areas and mountains, but the existing cable has poor strength and toughness and small breaking force, and is easy to break in places needing large-span erection, such as crossing rivers, air ports, high altitude and the like, so that accidents are easy to cause, and certain economic loss can be caused. And the overhead insulated cable needs to be laid in severe weather environments such as sunshine, rain, snow and the like for a long time, the cable is large in energy consumption and poor in weather resistance, and the insulation is damaged by freezing and damp, ultraviolet radiation and the like due to overlong time.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the weather-resistant insulated overhead cable is provided.

In order to achieve the purpose, the utility model provides a weather-resistant insulated overhead cable, which comprises a cable core, wherein the cable core is formed by twisting a plurality of weather-resistant insulated wire cores; fill after resistant sealed glue of waiting at the space department of cable core and wind package polyester fiber ribbon, wind the package outside the polyester fiber ribbon and strengthen the inner sheath, wind the package second E-PVC S-PVC compound outside the enhancement inner sheath and wash the epoxy ceramic dope layer that screen cloth back coating thickness is 0.2-0.3mm that sinks, wind package PTFE glass fiber high temperature cloth outside epoxy ceramic dope layer, establish resistant constant temperature sheath of waiting at PTFE glass fiber high temperature cloth overcoat.

Preferably, weatherability insulation core by the conductor, crowded package in the outer crosslinked polyethylene insulating layer of conductor, wrap the mesh cloth that washes away and the cladding is constituteed at the compound electrically conductive bubble cotton liner that washes away of mesh cloth outside first E-PVC S-PVC around the package outside the crosslinked polyethylene insulating layer.

Preferably, the conductor is formed by twisting weather-resistant steel wires.

Preferably, the conductive foam pad is formed by winding a conductive braided sleeve on a foam core made of polyurethane or EPDM.

Preferably, the conductive braided sleeve is woven by silver-plated nickel nylon, aluminum foil wires, nickel-copper alloy wires or tinned copper-clad steel wires.

Preferably, the reinforcing inner protection layer is annular and is formed by pouring weather-proof sealing glue outside the weather-proof steel cores and in the gap between the weather-proof steel cores after a plurality of weather-proof steel cores are arranged and combined into a circle.

Preferably, the reinforcing lining layer is of a circular ring shape, and is formed by pouring epoxy resin and curing the epoxy resin outside the carbon fibers and in gaps among the carbon fibers after a plurality of carbon fibers are arranged and combined into a circle.

Preferably, the weather-resistant constant-temperature sheath comprises a weather-resistant PP pipe, and the inner side of the weather-resistant PP pipe is adhered with an aerogel glass fiber felt through a weather-resistant adhesive.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the cable steel core is made of weather-resistant steel material, the material is formed by adding a small amount of corrosion-resistant elements such as copper, nickel and the like into plain carbon steel, and the cable steel core has the characteristics of high-quality steel such as toughness, plastic elongation, forming, welding and cutting, abrasion, high temperature, fatigue resistance and the like; the weather resistance is 2-8 times of that of plain carbon steel; meanwhile, the cable has the characteristics of rust resistance, corrosion resistance, long service life, thinning, consumption reduction, labor saving, energy saving and the like, greatly improves the weather resistance of the cable and the strength of the conductor, and is not easy to break;

2. the filling adopts weather-resistant sealant, the cable core is fixed after being cured, and the cable core has certain elasticity, so that the cable core is not easy to be extruded and broken, and in addition, the cable has high tear strength, elongation at break, tensile strength and weather resistance; the cable is made of the polyester fiber cable tie woven by the polyester fiber, so that the cable has the advantages of good insulating property, strong tensile force, high temperature resistance and oil resistance;

3. E-PVC/S-PVC composite polyester fibre mesh is wrapped outside the wire core and the cable core, so that the cable has the functions of water resistance and mildew resistance, has the properties of light weight, high tensile strength, acid and alkali resistance, high temperature resistance, good elasticity, flame retardance and the like, and greatly lightens the weight of the cable; the epoxy ceramic coating is coated outside the cable, so that the corrosion resistance of the cable is improved;

4. the wire core adopts the conductive foam liner as a shielding layer, has good shielding performance, and can reflect and absorb electricity according to the properties of objects when encountering radio waves, thereby providing excellent shielding effect; the low-pressure and good shielding effect is achieved, the shielding performance exceeds 90dB, the elasticity is realized, the weight is light, the surface contact resistance is low, the UL-level fire prevention is realized, and the conductive PSA can be adopted for fixation;

5. the high-temperature PTFE glass fiber cloth is adopted, the suspended polytetrafluoroethylene emulsion is used as a raw material, and the fiber formed by impregnating the high-performance glass fiber cloth is adopted, so that the cable is applied to the environment with the low temperature of-70 ℃ and the high temperature of 260 ℃, and the cable has the advantages of weather resistance, ageing resistance, chemical corrosion resistance, strong acid and alkali resistance, high strength and good mechanical property;

6. the cable is subjected to weather-resistant treatment from inside to outside and is subjected to treatment improvement aiming at severe environmental conditions, so that the weather resistance, the corrosion resistance and the like of the cable are greatly enhanced, and the service life of the cable is prolonged from the previous 10 years to 30 years.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the reinforced inner sheath of the present invention;

fig. 3 is a schematic structural view of the conductive foam pad of the present invention;

fig. 4 is a schematic structural view of the weather-resistant constant temperature sheath of the present invention.

Detailed Description

The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.

As shown in fig. 1, the utility model provides a weather-resistant insulated overhead cable, which comprises a cable core, wherein the cable core is formed by twisting a plurality of weather-resistant insulated wire cores; the weather-resistant insulated wire core is composed of a conductor 1, a cross-linked polyethylene insulating layer 2 extruded outside the conductor, a first E-PVC/S-PVC composite polyester fibre mesh 3 wrapped outside the cross-linked polyethylene insulating layer and a conductive foam pad 5 wrapped outside the first E-PVC/S-PVC composite polyester fibre mesh; the conductor is formed by twisting weather-resistant steel wires, so that the weather resistance of the conductor is enhanced; the conductive foam pad is used as a shielding layer, so that the shielding layer has good shielding performance, and can reflect and absorb electricity according to the properties of an object when encountering radio waves, thereby providing excellent shielding effect; the low-pressure and good shielding effect is achieved, the shielding performance exceeds 90dB, the elasticity is realized, the weight is light, the surface contact resistance is low, the UL-level fire prevention is realized, and the conductive PSA can be adopted for fixation;

after filling weather-resistant sealant 6 in the gap of the cable core, wrapping a polyester fiber ribbon 7, so that the cable core has good insulating property, strong tensile force, high temperature resistance and oil resistance; wrapping a reinforced inner protection layer 8 outside the polyester fiber ribbon, wrapping a second E-PVC/S-PVC composite polyester fibre screen cloth 9 outside the reinforced inner protection layer, coating an epoxy ceramic coating layer 10 with the thickness of 0.2-0.3mm, wrapping PTFE glass fiber high-temperature cloth 11 outside the epoxy ceramic coating layer, and sleeving a weather-resistant constant-temperature sheath 12 outside the PTFE glass fiber high-temperature cloth; the PTFE glass fiber high-temperature cloth is made of fibers formed by impregnating high-performance glass fiber cloth with suspended polytetrafluoroethylene emulsion serving as a raw material, so that the cable is applied to the environment with the low temperature of-70 ℃ and the high temperature of 260 ℃, and has the advantages of weather resistance, ageing resistance, chemical corrosion resistance, strong acid and alkali resistance, high strength and good mechanical property;

furthermore, as shown in fig. 2, the reinforcing inner protection layer 8 is annular, and is formed by arranging and combining a plurality of weather-resistant steel cores 13 into a circle, and pouring weather-resistant sealant 6 at the gap between the weather-resistant steel cores and the outside of the weather-resistant steel cores for curing, and the cable has a series of excellent performances such as high strength, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electric conduction, heat transfer, small thermal expansion coefficient and the like; the weather-resistant sealant plays a role in fixing the steel core after being cured, has certain elasticity, and further improves the tear strength, the elongation at break, the tensile strength and the weather resistance of the cable;

secondly, as shown in fig. 3, the conductive foam pad 5 is formed by winding a conductive braided sleeve 14 on a foam core 15 made of polyurethane or EPDM; the conductive braided sleeve is woven by silver-plated nickel nylon, aluminum foil wires, nickel-copper alloy wires or tinned copper-clad steel wires; the shielding material has good shielding performance, and can reflect and absorb electricity according to the properties of objects when encountering radio waves, thereby providing excellent shielding effect; the low-pressure and good shielding effect is achieved, the shielding performance exceeds 90dB, the elasticity is realized, the weight is light, the surface contact resistance is low, the UL-level fire prevention is realized, and the conductive PSA can be adopted for fixation;

finally, as shown in fig. 4, the weather-resistant constant-temperature sheath 12 comprises a weather-resistant PP pipe 16, the inner side of the weather-resistant PP pipe is bonded with an aerogel glass fiber mat 18 through a weather-resistant glue 17, and the weather-resistant PP pipe enables the cable to have good chemical corrosion resistance, high temperature resistance, oxidation resistance, weather resistance and ray radiation resistance, and also has frost crack resistance, dewing resistance and wear resistance; the aerogel glass fiber mat can bear pressure which is thousands of times of the self mass, can be melted when the temperature reaches 1200 ℃, has the insulation capability which is 39 times stronger than that of the best glass fiber, has very low thermal conductivity and refractive index, can bear the high temperature of 1400 ℃ and the low temperature of-100 ℃ at most, and can ensure that the overhead cable is relatively constant in use when being wrapped on the outer surface of the cable, thereby improving the current-carrying capacity of the cable and prolonging the service life of the cable.

The cable is subjected to a plurality of strengthening treatments from the wire core to the outer layer structure and also subjected to a plurality of weather-resistant treatments, so that the cable is longer in service life in severe environment and has more excellent performance than the existing cable.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered as belonging to the protection scope of the present invention.

Claims

1. A weather-resistant insulated overhead cable is characterized by comprising a cable core, wherein the cable core is formed by stranding a plurality of weather-resistant insulated wire cores; fill after resistant sealed glue of waiting at the space department of cable core and wind package polyester fiber ribbon, wind the package outside the polyester fiber ribbon and strengthen the inner sheath, wind the package second E-PVC S-PVC compound outside the enhancement inner sheath and wash the epoxy ceramic dope layer that screen cloth back coating thickness is 0.2-0.3mm that sinks, wind package PTFE glass fiber high temperature cloth outside epoxy ceramic dope layer, establish resistant constant temperature sheath of waiting at PTFE glass fiber high temperature cloth overcoat.

2. The weatherable insulated overhead cable of claim 1, wherein: weather resistance insulation core by the conductor, crowded package crosslinked polyethylene insulating layer outside the conductor, wrap the package outside crosslinked polyethylene insulating layer first E-PVC/S-PVC is compound to wash the screen cloth and the cladding is washing the cotton liner of electrically conductive bubble outside the screen cloth and constitute at first E-PVC/S-PVC complex.

3. The weatherable insulated overhead cable of claim 2, wherein: the conductor is formed by twisting weather-resistant steel wires.

4. The weatherable insulated overhead cable of claim 2, wherein: the conductive foam pad is formed by winding a conductive braided sleeve on a foam core made of polyurethane or EPDM.

5. The weatherable insulated overhead cable of claim 4, wherein: the conductive braided sleeve is woven by silver-plated nickel nylon, aluminum foil wires, nickel-copper alloy wires or tinned copper-clad steel wires.

6. The weatherable insulated overhead cable of claim 1, wherein: the reinforced inner protection layer is annular and is formed by pouring weather-proof sealing glue outside the weather-proof steel cores and in the gaps among the weather-proof steel cores and curing after a plurality of weather-proof steel cores are arranged and combined into a circle.

7. The weatherable insulated overhead cable of claim 1, wherein: the weather-proof constant-temperature sheath comprises a weather-proof PP pipe, and the inner side of the weather-proof PP pipe is connected with an aerogel glass fiber felt through a weather-proof adhesive.