CN215451008U

CN215451008U - Solid aluminum or aluminum alloy conductor power cable of 35kV and below

Info

Publication number: CN215451008U
Application number: CN202121371724.9U
Authority: CN
Inventors: 朱春宇; 赵丹丹; 罗风魁; 李林林; 黄付环; 潘永欣
Original assignee: Jiangtong Shenghua Shanghai Cable Co ltd
Current assignee: Jiangtong Shenghua Shanghai Cable Co ltd
Priority date: 2021-06-19
Filing date: 2021-06-19
Publication date: 2022-01-07
Anticipated expiration: 2031-06-19

Abstract

The utility model relates to a 35kV reaches following solid aluminium or aluminum alloy conductor power cable, it includes the protective layer and wears to establish the intraformational insulated wire core of protection, still include the cladding at the outer shielding layer on insulated wire core, the material of conductor is solid aluminium or aluminum alloy in the insulated wire core, this application replaces the transposition aluminum conductor in the traditional cable through using solid aluminium/aluminum alloy material, the mechanical properties and the electrical property of insulated wire core have greatly been improved, can effectively reduce the risk that cable internal insulation is ageing or overheated electric breakdown, this application has the increase performance, reduce the characteristics of power consumption accident.

Description

Solid aluminum or aluminum alloy conductor power cable of 35kV and below

Technical Field

The application relates to the field of electric wires and cables, in particular to a solid aluminum or aluminum alloy conductor power cable with the voltage of 35kV or below.

Background

The power cable is a key product for transmitting and distributing electric energy in a main line and a distribution network line of a power system, mainly comprises alternating current power cables with rated voltage of U0/U0.6/1 kV-290 kV, wherein the power cables with voltage class of 35kV or below comprise low-voltage power cables with voltage class of 1.8/3kV or below and medium-voltage power cables with voltage class of 3.6/6 kV-26/35 kV, and is widely applied to various industries such as urban power distribution networks, green buildings, intelligent transportation, petroleum and petrochemical industry, intelligent manufacturing, resource and energy development and utilization, public services, ocean economy and the like.

In the related technology, a power cable below 35kV is usually made by adopting a stranded aluminum conductor as an insulating wire core, the stranded aluminum conductor is formed by stranding a plurality of aluminum single wires, aluminum is easy to oxidize, a compact aluminum oxide film can be formed on the surface of each aluminum single wire, when the conductor is installed to be connected or a terminal, the aluminum oxide film on each aluminum single wire can not be completely pressed and broken due to the fact that the aluminum single wires are not in place pressed and broken, and partial aluminum single wires can be pressed and broken due to too tight pressing and pressing, the resistance of the conductor connection part and the terminal part can be increased, the heat generation quantity is increased, the insulation aging of the cable is aggravated or the cable is subjected to overheat electric breakdown, and a part to be improved exists.

SUMMERY OF THE UTILITY MODEL

To the not enough that prior art exists, this application provides a solid aluminium or aluminum alloy conductor power cable of 35kV and below.

The application provides a 35kV and following solid aluminium or aluminum alloy conductor power cable adopts following technical scheme:

the utility model provides a solid aluminium or aluminum alloy conductor power cable of 35kV and following, includes the protective layer, be provided with many insulation core in the protective layer, arbitrary insulation core from interior to exterior is solid aluminium/aluminum alloy conductor, conductor shielding layer, insulating layer and insulation shielding layer in proper order, arbitrary insulation core outside cladding has outer shielding layer.

By adopting the technical scheme, the electrical property and the mechanical property of the solid aluminum/aluminum alloy conductor are far higher than those of the traditional stranded aluminum conductor, and the risks of insulation aging and overheating electric breakdown inside the cable can be effectively reduced.

Preferably, the protective layer sequentially comprises an inner protective layer, an armor layer and an outer sheath from inside to outside.

Through adopting above-mentioned technical scheme, interior sheath, armor and oversheath can play the guard action to the outside of cable, prevent to lead to the ageing of cable in burying ground back environment humidity.

Preferably, the outer shielding layer is provided as a metal shielding layer.

By adopting the technical scheme, the insulating shielding layer and the metal shielding layer can isolate the electromagnetic field in the insulating wire core from the magnetic field in other insulating wire cores, and are favorable for isolating the electromagnetic interference generated between the insulating wire cores during power transmission.

Preferably, a filling layer is formed between the insulating wire core and the inner sheath, and the filling layer is filled with a flame-retardant filling rope made of ceramic fibers.

Through adopting above-mentioned technical scheme, filler material can make insulating sinle silk and filling layer round relatively, is convenient for wrap up the protective layer in the outside on the one hand, and the fire-retardant filling rope of on the other hand pottery is insulating fire-resistant high temperature resistant, and the speed that the intensity of a fire spread when can effectively slow down the power consumption accident takes place strives for the time for the fire fighter.

Preferably, the armor layer is a steel tape armor layer or a steel wire armor layer.

By adopting the technical scheme, the steel strip armor layer and the steel wire armor layer have high magnetic permeability and good magnetic shielding effect, so that the cable can resist the interference of a low-frequency magnetic field from the outside, and the conductive efficiency is improved.

Preferably, the inner sheath layer is a medium-density PVC inner sheath layer, and the outer sheath layer is a medium-density PE outer sheath layer.

Through adopting above-mentioned technical scheme, the oversheath can prevent biological infringement and chemical's erosion, and after the ageing damage of oversheath, the inner sheath can continue to play the guard action, plays the duplicate protection effect, further improves the safety in utilization of cable.

Preferably, still including setting up the heating panel in the protective layer, heating panel quantity is the same with the quantity of insulating sinle silk, and arbitrary heating panel is close to the equal fixed connection in one side at protective layer axis center, arbitrary the insulating sinle silk all with the heating panel butt.

Through adopting above-mentioned technical scheme, the heating panel can absorb and disperse the heat that insulating core produced when transmitting electricity, and the radiating head can increase heat radiating area, further improves the radiating effect, buries the radiating head underground simultaneously and can prevent that radiating head and interior sheath contact from igniting or melting interior sheath in fire-retardant filler rope, is favorable to preventing the emergence of power consumption accident.

Preferably, a heat dissipation groove is formed in the heat dissipation plate, and heat dissipation wires made of red copper are filled in the heat dissipation groove in a penetrating mode.

By adopting the technical scheme, the heat conductivity of the red copper is second to that of the silver, and the red copper radiating wires are filled in the radiating grooves, so that the heat conducting performance and the radiating performance of the radiating assembly are further improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the traditional stranded aluminum conductor is replaced by the solid aluminum/aluminum alloy conductor, so that the mechanical property and the electrical property of the conductor are greatly improved, and the risk of insulation aging or overheating electrical breakdown inside the cable can be effectively reduced;

2. the protection of the protective layer to the outside of the cable and the protection of the shielding layer to the inside of the cable are used, so that the influence of environmental factors and electromagnetic interference on the insulated wire core is reduced, the service life of the cable is prolonged, and the conductive efficiency is improved;

3. through the setting of heating panel, radiating head and red copper radiator wire and the parcel of fire-retardant filling rope to insulating core, be favorable to absorbing and giving off the heat that insulating core produced at the transmission of electricity in-process, be favorable to maintaining the transmission of electricity ability of cable, can delay the speed of stretching of intensity of a fire when the power consumption accident takes place simultaneously, strive for the time of putting out a fire for the fire fighter.

Drawings

FIG. 1 is a schematic cross-sectional view of a power cable mainly embodying a 35kV or less solid aluminum or aluminum alloy conductor according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a solid aluminum or aluminum alloy conductor power cable of 35kV or less according to the second embodiment of the present application;

fig. 3 is a schematic cross-sectional view mainly showing a structure of a heat dissipation assembly in the second embodiment of the present application.

Reference numerals: 1. a protective layer; 11. an inner protective layer; 12. an armor layer; 13. an outer sheath; 2. an insulated wire core; 21. a solid aluminum/aluminum alloy conductor; 22. a conductor shield layer; 23. an insulating layer; 24. an insulating shield layer; 3. a metal shielding layer; 4. a flame retardant filler rope; 5. a heat dissipation plate; 51. a heat sink; 52. and a heat dissipation wire.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a solid aluminum or aluminum alloy conductor power cable of 35kV and below.

Example 1

Referring to fig. 1, 35kV and following solid aluminum or aluminum alloy conductor power cable includes many insulation core 2, set up to three in this embodiment, three insulation core 2 include solid aluminum/aluminum alloy conductor 21 from inside to outside in proper order, conductor shielding layer 22, insulating layer 23 and insulation shielding layer 24, conductor shielding layer 22 cladding is outside at solid aluminum/aluminum alloy conductor 21, insulating layer 23 cladding is outside at conductor shielding layer 22, insulation shielding layer 24 cladding is outside at insulating layer 23, three insulation core 2 are two liang of butt settings of article font, arbitrary insulation core 2 outside all claddings have the outer shielding layer, the outer shielding layer is metal shielding layer 3, and three insulation core 2's that are cladded by metal shielding layer 3 outside cladding has protective layer 1 jointly.

In-service use, insulating sinle silk 2 can keep apart the electromagnetic field in insulating sinle silk 2 and the electromagnetic field in other insulating sinle silks 2 under metal shielding layer 3's cladding, the electromagnetic interference who produces when transmitting electricity between isolated three insulating sinle silks 2, the protective layer 1 that sets up in insulating sinle silk 2 outside simultaneously helps improving the life of cable, prevent that the cable is outer to receive external environment or biological infringement's reason and ageing damage buried underground or fixed laying.

Referring to fig. 1, the protective layer 1 sequentially comprises an inner protective layer 11, an armor layer 12 and an outer sheath 13 from inside to outside, the inner protective layer 11 is a medium-density PVC inner protective layer, the armor layer 12 is a steel tape armor layer or a steel wire armor layer, the outer sheath 13 is a medium-density PE outer protective layer capable of preventing biological damage, the inner protective layer 11 and three insulation wire cores 2 are formed with a filling layer, and a flame-retardant filling rope 4 made of ceramic fibers is arranged in the filling layer.

After the cable is buried underground or fixedly laid, oversheath 13 can prevent the destruction of biology such as termite to the cable conductor on the one hand, on the other hand also can prevent external environment to the damage of cable, armor 12 has good magnetic screen effect, can resist low-frequency electric interference, improve electrically conductive efficiency, inner sheath 11 not only continues to play the effect of protection cable housing when outer sheath 13 is ageing damaged, also can play certain separation effect when insulating sinle silk 2 takes place the power accident and catches fire, because fire-resistant high temperature is resisted in the insulating fire-retardant filling layer, the speed that the intensity of a fire stretchs when can effectively slowing down the power accident emergence, strive for the time of putting out a fire for fire fighter.

The implementation principle of the solid aluminum or aluminum alloy conductor power cable of 35kV and below in the embodiment of the application is as follows: the outer cladding metallic shield layer 3 of insulating sinle silk 2 that will produce earlier, the insulating sinle silk 2 that will three claddings have metallic shield layer 3 this moment is behind two butt settings of article font, pack fire-retardant filling layer and expose the position in the outside after 2 butts of three insulating sinle silks, and adjust the shape of assembly for being fit for cladding protective layer 1's cylindricality, at assembly outside cladding inner sheath 11 in proper order this moment, armor 12 and oversheath 13, constitute solid aluminum conductor power cable, because the conductor of this cable is solid aluminium or aluminum alloy material, traditional transposition aluminum conductor has been replaced, the mechanical properties and the electrical property of insulating sinle silk 2 have greatly been improved, can effectively reduce the risk that the inside insulation of cable is ageing or overheated electric breakdown.

Example 2

Referring to fig. 2 and fig. 3, the difference between this embodiment and embodiment 1 lies in that, the abutting surface of two pairs of butts of three insulated wire cores 2 is provided with the heat dissipation plate 5, the number of the heat dissipation plates 5 corresponding to the insulated wire cores 2 is three, and one side of the three heat dissipation plates 5 close to the axis of the protective layer 1 is fixedly connected by welding, any heat dissipation plate 5 is made of aluminum alloy with good heat conductivity, one side of any heat dissipation plate 5 away from the axis of the protective layer 1 is provided with a heat dissipation head, a heat dissipation groove 51 is formed inside a combined body formed by the three heat dissipation plates 5, a plurality of heat dissipation wires 52 are filled in the heat dissipation groove 51 in a penetrating manner, the three heat dissipation heads and the plurality of heat dissipation wires 52 are made of red copper with heat conductivity superior to that of aluminum alloy, and the three heat dissipation heads are buried in the flame-retardant filling rope 4 and are not in contact with the inner protective layer 11.

The implementation principle of the embodiment 2 is as follows: the heat dissipation plate 5 can absorb heat generated by the insulated wire core 2 in the power transmission process and dissipate heat through the red copper heat dissipation head, the heat dissipation grooves 51 and the red copper heat dissipation wires 52 inside the heat dissipation plate can further improve the heat conduction efficiency of the heat dissipation plate 5, and the heat dissipation plate is favorable for preventing the situation that the current carrying capacity of a cable is reduced due to overhigh temperature of the insulated wire core 2 in the power transmission process.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a solid aluminium or aluminum alloy conductor power cable of 35kV and following which characterized in that: including protective layer (1), be provided with many insulation core (2) in protective layer (1), arbitrary insulation core (2) from interior to exterior is solid aluminium/aluminum alloy conductor (21), conductor shielding layer (22), insulating layer (23) and insulation shielding layer (24) in proper order, arbitrary insulation core (2) outside cladding has outer shielding layer.

2. The power cable of claim 1, wherein the power cable comprises a solid aluminum or aluminum alloy conductor of 35kV or below: the protective layer (1) sequentially comprises an inner protective layer (11), an armor layer (12) and an outer sheath (13) from inside to outside.

3. The power cable of claim 1, wherein the power cable comprises a solid aluminum or aluminum alloy conductor of 35kV or below: the outer shielding layer is set as a metal shielding layer (3).

4. The power cable of claim 2, wherein the solid aluminum or aluminum alloy conductor is one of 35kV and below: and a filling layer is formed between the insulating wire core (2) and the inner protection layer (11), and the filling layer is filled with a flame-retardant filling rope (4) made of ceramic fibers.

5. The power cable of claim 2, wherein the solid aluminum or aluminum alloy conductor is one of 35kV and below: the armor layer (12) is a steel belt armor layer or a steel wire armor layer.

6. The power cable of claim 2, wherein the solid aluminum or aluminum alloy conductor is one of 35kV and below: the inner sheath layer (11) is a medium-density PVC inner sheath layer, and the outer sheath (13) is a medium-density polyethylene outer sheath layer.

7. The power cable of claim 1, wherein the power cable comprises a solid aluminum or aluminum alloy conductor of 35kV or below: still including setting up heating panel (5) in protective layer (1), heating panel (5) quantity is the same with the quantity of insulating core (2), and arbitrary heating panel (5) are close to the equal fixed connection in one side at protective layer (1) axis center, arbitrary insulating core (2) all with heating panel (5) butt.

8. The power cable of claim 7, wherein the solid aluminum or aluminum alloy conductor is one of 35kV and below: a heat dissipation groove (51) is formed in the heat dissipation plate (5), and heat dissipation wires (52) made of red copper are filled in the heat dissipation groove (51) in a penetrating mode.