CN116884674A - Polypropylene insulated cable for new energy power generation distribution network connection and preparation method thereof - Google Patents

Abstract

The application relates to a polypropylene insulated cable for connecting a new energy power generation distribution network and a preparation method thereof, wherein the cable comprises a conductor, an insulating layer is extruded on the conductor to form a wire core, a plurality of wire cores are twisted to form a cable core, gaps among the wire cores are filled, two layers of non-woven fabrics are wrapped outside the cable core to form a wrapped cable core, a separation sleeve is extruded outside the wrapped wire core, two galvanized steel strips are wrapped outside the separation sleeve to form an armor layer, and a sheath layer is extruded outside the armor layer. The product of the application has excellent electrical property, heat resistance, high and low temperature resistance and the like. Compared with crosslinked polyethylene insulation, the production and processing process is simple, the energy consumption is further reduced, the insulation waste material and the retired insulation material generated in the production process can be recycled, the energy consumption for treatment is further reduced, and meanwhile, the pollution of solid waste to the environment is avoided.

Description

Polypropylene insulated cable for new energy power generation distribution network connection and preparation method thereof

Technical Field

The application relates to the field of cables, in particular to a polypropylene insulated cable for connecting a new energy power generation distribution network and a preparation method thereof.

Background

In recent years, renewable energy demands are continuously increased, the online proportion of new energy power generation such as wind energy and solar energy is continuously improved, and the consumption of cables for network connection is also greatly improved as an important component of the online power transmission of the new energy power generation. Control of carbon emission and recycling of materials in the production process of cables for connecting new energy power generation distribution networks are also of great concern.

At present, a cable for connecting a new energy power generation distribution network mainly adopts copper, aluminum or aluminum alloy materials as conductors, adopts a crosslinked polyethylene insulating material for insulation, and has the rated voltage class of 0.6/1 kV-26/35 kV. The crosslinked polyethylene insulating material has the advantages of excellent electrical property, excellent heat resistance, excellent processability and the like, and is widely applied to the wire industry at present. On the one hand, the crosslinked polyethylene can be changed into the netlike molecules from linear molecules by means of steaming, high temperature and high pressure or radiation in the processing process, so that a large amount of energy is consumed, and excessive carbon emission is generated. On the other hand, the crosslinked polyethylene is a thermosetting polymer, and insulation waste in the cable production process and insulation after retirement cannot be reused by melt processing, and the crosslinked polyethylene needs to be disposed of by means of incineration, cracking, burial and the like. Again consuming a lot of energy and also having a negative impact on the environment.

Disclosure of Invention

The embodiment of the application aims to provide a polypropylene insulated cable for connecting a new energy power generation distribution network and a preparation method thereof, wherein the cable does not need to be steamed, high-temperature and high-pressure or radiation irradiation and other processing in the processing process, the cable performance can reach the same performance of crosslinked polyethylene insulation, and the energy consumption in the processing process can be reduced. Meanwhile, the polypropylene is a thermoplastic polymer, and insulating waste and insulating materials after retirement generated in the production process can be recycled, so that the energy consumption for treatment is further reduced, and meanwhile, the pollution of solid waste to the environment is avoided.

In order to achieve the above purpose, the present application provides the following technical solutions:

the embodiment of the application provides a polypropylene insulated cable for connecting a new energy power generation distribution network, which comprises a conductor, wherein an insulating layer is extruded on the conductor to form a wire core, a plurality of wire cores are twisted to form a cable core, gaps among the wire cores are filled, two layers of non-woven fabrics are wrapped outside the cable core to form a wrapped cable core, an isolation sleeve is extruded outside the wrapped wire core, two layers of galvanized steel strips are wrapped outside a gap outside the isolation sleeve to form an armor layer, and a sheath layer is extruded outside the armor layer.

In one embodiment, a polypropylene insulated cable for connecting a new energy power generation distribution network comprises a conductor, wherein a first semiconductive shielding layer is extruded on the conductor, an insulating layer is extruded outside the first semiconductive shielding layer, a second semiconductive shielding layer is extruded outside the insulating layer, a wire core is formed by wrapping a metal shielding layer outside the second semiconductive shielding layer, a plurality of wire cores are stranded to form a cable core, filling is added in gaps of the plurality of wire cores, two layers of high-flame-retardant tapes are wrapped outside the cable core to form a wrapped cable core, a spacer sleeve is extruded outside the wrapped wire core, two layers of galvanized steel strips are wrapped outside the spacer sleeve to serve as armor layers, and a sheath layer is extruded outside the armor layers.

The conductor is an aluminum alloy conductor or a copper conductor, the aluminum alloy conductor is made of aluminum alloy monofilaments through a stranding mode, and the copper conductor is made of copper monofilaments through a stranding mode.

The filling is polypropylene filling ropes.

The filling is a flame-retardant filling rope.

The metal shielding layer is made of a soft copper belt with the thickness of 0.1 mm.

In one embodiment, the preparation method of the polypropylene insulated cable for connecting the new energy power generation distribution network comprises the following steps:

manufacturing an aluminum alloy conductor from aluminum alloy monofilaments in a stranding mode;

extruding an insulating layer on the aluminum alloy conductor, wherein the insulating layer is made of polypropylene elastomer polymer;

twisting the four wire cores after the insulating layers are extruded according to the pitch diameter ratio of 30-60 and the right direction, adding filling materials into gaps during twisting, wherein the filling materials are polypropylene filling ropes, and wrapping two layers of non-woven fabrics to prepare a wrapped wire core;

extruding and wrapping a spacer sleeve outside the wrapping wire core, wherein the spacer sleeve is made of polyvinyl chloride polymer;

outside the isolation sleeve, a gap wrapping two layers of galvanized steel strips with the thickness of 0.5mm are used as armor layers;

finally, a sheath layer is extruded outside the armor layer, and the sheath layer is made of polyvinyl chloride polymer.

In one embodiment, the preparation method of the polypropylene insulated cable for connecting the new energy power generation distribution network comprises the following steps:

the soft copper wires are made into copper conductors in a twisting mode, and the types of the copper conductors are 2 nd twisting compressed conductors;

respectively extruding first semi-conductive shielding layers on the copper conductors;

extruding an insulating layer outside the first semiconductive shielding layer;

the insulating layer is externally extruded with a second semi-conductive shielding layer, the materials of the first semi-conductive shielding layer and the second semi-conductive shielding layer are semi-conductive polypropylene elastomer polymers, and the material of the insulating layer is polypropylene elastomer polymer

A soft copper belt with the thickness of 0.1mm is wrapped outside the second semi-conductive shielding layer to form a metal shielding layer;

twisting the wire cores of the three wrapped metal shielding layers according to the pitch diameter ratio of 30-60 and the right direction, adding filling materials into gaps during twisting, wherein the filling materials are flame-retardant filling ropes, and wrapping two layers of high flame-retardant belts to obtain a wrapped wire core;

extruding and wrapping a spacer sleeve outside the wrapping wire core, wherein the spacer sleeve is made of halogen-free low-smoke flame-retardant polymer;

outside the isolation sleeve, a gap wrapping two layers of galvanized steel strips with the thickness of 0.8mm are used as armor layers;

finally, a sheath layer is extruded outside the armor layer, and the sheath layer is made of halogen-free low-smoke flame-retardant polymer.

Compared with the prior art, the application has the beneficial effects that:

the polypropylene insulated cable is suitable for connection of network distribution equipment, switches and electrical cabinets of new energy power stations such as wind power stations and solar energy stations.

The state polypropylene insulated cable of the application has the following advantages: the product has excellent electrical property, heat resistance, high and low temperature resistance and the like. Compared with crosslinked polyethylene insulation, the production and processing process is simple, the energy consumption is further reduced, the insulation waste material and the retired insulation material generated in the production process can be recycled, the energy consumption for treatment is further reduced, and meanwhile, the pollution of solid waste to the environment is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a cross-sectional structure of a polypropylene insulated cable (low voltage) for connecting a new energy power generation distribution network according to an embodiment of the application;

fig. 2 is a schematic diagram of a cross-sectional structure of a polypropylene insulated cable (medium voltage) for connecting a new energy power generation distribution network according to an embodiment of the application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The terms "first," "second," and the like, are used merely to distinguish one entity or action from another entity or action, and are not to be construed as indicating or implying any actual such relationship or order between such entities or actions.

Referring to fig. 1, the embodiment of the application provides a polypropylene insulated cable for connecting a new energy power generation distribution network, which comprises a conductor, 1, wherein an insulating layer 3 is extruded on the conductor 1 to form a wire core, a plurality of wire cores are twisted to form a cable core, filling 6 is added in gaps of the wire cores, two layers of non-woven fabrics are wrapped outside the cable core to form a wrapped cable core, a spacer 7 is extruded outside the wrapped wire core, two galvanized steel strips are wrapped outside the spacer 7 to serve as an armor layer 8, and a sheath layer 9 is extruded outside the armor layer 8.

The aluminum alloy conductor 1 with the diameter of 17.4mm is manufactured by twisting 34 aluminum alloy monofilaments, the insulating layer 2 is extruded on the aluminum alloy conductor 1 once, the thickness of the insulating layer 2 is 1.7mm, and the material is polypropylene elastomer polymer. And twisting the four wire cores after the insulating layers are extruded according to the pitch diameter ratio of 30-60 and the right direction, adding filling 6 into the gaps during twisting, and winding two layers of non-woven fabrics with polypropylene filling ropes to obtain the winding wire core. Outside the wrapping wire core, a spacer sleeve 7 is extruded, the thickness is 1.4mm, and the material is polyvinyl chloride polymer. Outside the isolation sleeve 7, two galvanized steel strips with the thickness of 0.5mm are wrapped in a gap mode to serve as armor layers 8. Finally, a sheath layer 9 is extruded outside the armor layer 8, the thickness is 2.9mm, and the material is polyvinyl chloride polymer.

After examining the polypropylene insulated cable (low voltage) prepared in this example, a test voltage of 6kV was applied between the two conductors for 5 minutes, and the insulation of the two conductors was not broken down. The insulated conductor was placed in water alone and a voltage of 2.4kV was applied between the conductor and water for 4 hours without breakdown of the insulation. Compared with XLPE insulated cables, the method can reduce the electric energy consumption by 400 kilowatt-hours in the production and recovery links and can reduce the carbon emission by 400 kg.

In one embodiment, a polypropylene insulated cable for connecting a new energy power generation distribution network comprises a conductor 1, wherein a first semiconductive shielding layer 2 is extruded on the conductor 1, an insulating layer 3 is extruded outside the first semiconductive shielding layer 2, a second semiconductive shielding layer 4 is extruded outside the insulating layer 3, a layer of metal shielding layer 5 is wrapped outside the second semiconductive shielding layer 4 to form a wire core, a plurality of wire cores are twisted to form a cable core, filling 6 is added in gaps of the plurality of wire cores, a wrapping cable core is made by wrapping two layers of high-flame-retardant tapes outside the cable core, a spacer 7 is extruded outside the wrapping wire core, two layers of galvanized steel strips are wrapped outside the spacer 7 to serve as armor layers 8, and a layer of sheath layer 9 is extruded outside the armor layers 8.

38 soft copper wires were made into copper conductor 1 with a diameter of 19.5mm by stranding, the copper conductor type being the 2 nd stranded compacted conductor. The copper conductor 1 is extruded with a semiconductive shielding layer 2 with the thickness of 0.8mm, an insulating layer 3 with the thickness of 10.5mm and a semiconductive shielding layer 4 with the thickness of 1.0mm, wherein the semiconductive shielding layers 2 and 4 are made of semiconductive polypropylene elastomer polymer, and the insulating layer 3 is made of polypropylene elastomer polymer. And a soft copper belt with the thickness of 0.1mm is wrapped outside the extruded semiconductive shielding layer 4 to form a metal shielding layer 5. And twisting the wire cores of the three wrapped metal shielding layers according to a pitch diameter ratio of 30-60 and a right direction, adding filling 6 into the gaps during twisting, wherein the material is a flame-retardant filling rope, and wrapping two layers of high flame-retardant belts to obtain the wrapped wire core. And the thickness of the isolation sleeve 7 is 2.5mm outside the wrapping wire core, and the material is halogen-free low-smoke flame-retardant polymer. Outside the isolation sleeve 7, two galvanized steel strips with the thickness of 0.8mm are wrapped in a gap mode to serve as armor layers 8. Finally, a sheath layer 9 is extruded outside the armor layer 8, the thickness is 4.6mm, and the material is halogen-free low-smoke flame-retardant polymer.

After examining the polypropylene insulated cable (medium voltage) prepared in this example, 91kV voltage was applied to the conductor and the shield layer for 5 minutes, and the insulation was not broken down. No breakdown of the insulation occurred after applying the 104kV voltage to the conductor and shield for 4 hours. Compared with XLPE insulated cable, the method can reduce 1000 kilowatt-hours of electric energy consumption in production and recovery links and can reduce 1000kg of carbon emission.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. The utility model provides a new forms of energy electricity generation joins in marriage net and connects with polypropylene insulated cable, its characterized in that includes the conductor, crowded package insulating layer forms the sinle silk on the conductor, and many sinle silk transposition forms the cable core, adds the packing in the space of many sinle silk, the cable core is outside to wrap up two-layer non-woven fabrics and is made around wrapping the cable core, crowded package spacer sleeve outside wrapping up the sinle silk, spacer sleeve outer clearance is wrapped up two-layer galvanized steel strip and is taken as the armor, crowded package one deck restrictive coating outside the armor.

2. The utility model provides a new forms of energy electricity generation joins in marriage net and connects with polypropylene insulated cable, its characterized in that includes the conductor, crowded package first semiconductive shield layer on the conductor, crowded package insulating layer outside the first semiconductive shield layer, crowded package second semiconductive shield layer outside the insulating layer, the second semiconductive shield layer forms the sinle silk around wrapping one deck metal shield layer, and many sinle silk transposition forms the cable core, adds the packing in the space of many sinle silk, the cable core is made around wrapping the cable core around wrapping two-layer high fire-retardant area, crowded package spacer sleeve outside wrapping the sinle silk, spacer sleeve outer gap is around wrapping two-layer galvanized steel strip as the armor, crowded package one deck restrictive coating outside the armor.

3. The polypropylene insulated cable for connecting a new energy power generation distribution network according to claim 1 or 2, wherein the conductor is an aluminum alloy conductor or a copper conductor, the aluminum alloy conductor is an aluminum alloy monofilament and is manufactured by a stranding mode, and the copper conductor is a copper monofilament and is manufactured by a stranding mode.

4. The polypropylene insulated cable for connecting a new energy power distribution network according to claim 1, wherein the filler is a polypropylene filler rope.

5. The polypropylene insulated cable for connecting a new energy power distribution network according to claim 2, wherein the filler is a flame-retardant filler rope.

6. The polypropylene insulated cable for connecting a new energy power generation distribution network according to claim 2, wherein the metal shielding layer is made of a soft copper tape with the thickness of 0.1 mm.

7. The preparation method of the polypropylene insulated cable for the connection of the new energy power generation distribution network is characterized by comprising the following steps of:

manufacturing an aluminum alloy conductor from aluminum alloy monofilaments in a stranding mode;

extruding an insulating layer on the aluminum alloy conductor, wherein the insulating layer is made of polypropylene elastomer polymer;

twisting the four wire cores after the insulating layers are extruded according to the pitch diameter ratio of 30-60 and the right direction, adding filling materials into gaps during twisting, wherein the filling materials are polypropylene filling ropes, and wrapping two layers of non-woven fabrics to prepare a wrapped wire core;

extruding and wrapping a spacer sleeve outside the wrapping wire core, wherein the spacer sleeve is made of polyvinyl chloride polymer;

outside the isolation sleeve, a gap wrapping two layers of galvanized steel strips with the thickness of 0.5mm are used as armor layers;

finally, a sheath layer is extruded outside the armor layer, and the sheath layer is made of polyvinyl chloride polymer.

8. The preparation method of the polypropylene insulated cable for the connection of the new energy power generation distribution network is characterized by comprising the following steps of:

the soft copper wires are made into copper conductors in a twisting mode, and the types of the copper conductors are 2 nd twisting compressed conductors;

respectively extruding first semi-conductive shielding layers on the copper conductors;

extruding an insulating layer outside the first semiconductive shielding layer;

the insulating layer is externally extruded with a second semi-conductive shielding layer, the materials of the first semi-conductive shielding layer and the second semi-conductive shielding layer are semi-conductive polypropylene elastomer polymers, and the material of the insulating layer is polypropylene elastomer polymer

A soft copper belt with the thickness of 0.1mm is wrapped outside the second semi-conductive shielding layer to form a metal shielding layer;

twisting the wire cores of the three wrapped metal shielding layers according to the pitch diameter ratio of 30-60 and the right direction, adding filling materials into gaps during twisting, wherein the filling materials are flame-retardant filling ropes, and wrapping two layers of high flame-retardant belts to obtain a wrapped wire core;

extruding and wrapping a spacer sleeve outside the wrapping wire core, wherein the spacer sleeve is made of halogen-free low-smoke flame-retardant polymer;

outside the isolation sleeve, a gap wrapping two layers of galvanized steel strips with the thickness of 0.8mm are used as armor layers;

finally, a sheath layer is extruded outside the armor layer, and the sheath layer is made of halogen-free low-smoke flame-retardant polymer.