CN219085707U - 6-35kV rated voltage crosslinked polyethylene insulation flame-retardant environment-friendly power cable - Google Patents

Abstract

The utility model relates to the technical field of power cables and discloses an environment-friendly power cable with a rated voltage of 6-35kV crosslinked polyethylene insulating flame-retardant polyethylene sheath, wherein three groups of fiber cores are adopted in the cable, each group of cable cores comprises an inner semiconductive shielding layer, a crosslinked polyethylene insulating layer and an outer semiconductive shielding layer, the outer layers of the outer semiconductive shielding layers are overlapped and wrapped with copper strip shielding layers, the cable cores are combined into a cable, the cable is filled into a round shape by flame-retardant filling strips, a wrapped ceramic fire-resistant composite belt is wrapped and fastened, a ceramic silicon rubber inner protective layer is extruded and wrapped, a fine steel wire armor layer is wound, a low-smoke halogen-free polyolefin protective layer is extruded and a copper wire braiding layer is braided, and the cable has excellent electric performance, good heat resistance, flame resistance, chemical corrosion resistance, water resistance, cold resistance, no fall limitation in laying and the like, and is mainly used for nuclear power stations, urban rail transit, high-rise buildings and places with higher requirements on safety and environmental protection.

Description

6-35kV rated voltage crosslinked polyethylene insulation flame-retardant environment-friendly power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to a crosslinked polyethylene insulating flame-retardant environment-friendly power cable with rated voltage of 6-35 kV.

Background

The traditional cable not only contains heavy metals such as lead, cadmium, mercury and the like, but also contains a large amount of pollution substances such as dioxin, lead, cadmium, halide and the like in the manufacturing, using and waste treatment processes; if the fire burns, a great deal of dense smoke is released, a great deal of corrosive harmful gas is generated, the environment is polluted, and a great deal of casualties are caused. Compared with the traditional cable, the environment-friendly cable basically has high flame retardance, no halogen, low mildew, no corrosive gas production, high light transmittance and high protection against ultraviolet rays or water. The environment protection requirements of developed countries such as Europe, america, and the sun on the used cables are higher and higher, and non-environment-friendly cables are strictly forbidden to be used or imported. The field is also very important in China, and related laws and regulations require that in major engineering construction, non-environment-friendly cables are strictly forbidden. The environmental protection cable is a big trend, and in recent years, the sales share of environmental protection cable products is greatly expanded, and the environmental protection cable becomes the mainstream of the future cable market due to the characteristics of no toxicity and pollution to people and environment, high safety and reliability, long service life and the like. I'm company is designed for the development of the current cable industry and customer use requirements.

Therefore, a crosslinked polyethylene insulated flame-retardant environment-friendly power cable with rated voltage of 6-35kV is provided.

Disclosure of Invention

The utility model mainly solves the technical problems in the prior art and provides a crosslinked polyethylene insulation flame-retardant environment-friendly power cable with rated voltage of 6-35 kV.

In order to achieve the aim, the utility model adopts the following technical scheme that the crosslinked polyethylene insulated flame-retardant environment-friendly power cable with the rated voltage of 6-35kV comprises three groups of cable cores, wherein the three groups of cable cores are wound into a cable, the cable cores are filled into a round shape by flame-retardant filling strips, the outermost side of the three groups of cable cores is wrapped with a ceramic flame-retardant composite belt in a wrapping manner, the ceramic silicon rubber inner protective layer is extruded, the thin steel wire armor layer is wound, the low-smoke halogen-free polyolefin protective layer is extruded, the copper wire braid layer is woven, the outer layer is wrapped with a ceramic flame-retardant composite belt in a wrapping manner, and the outer protective sleeve is an environment-friendly flame-retardant polyethylene protective sleeve.

Preferably, the cable core is made of copper core or aluminum alloy.

Preferably, the inner part of each group of cable cores comprises an inner semiconductive shielding layer, a crosslinked polyethylene insulating layer and an outer layer of an outer semiconductive shielding layer, wherein the outer layers of the outer semiconductive shielding layers are overlapped and wrapped with a copper belt shielding layer.

Preferably, the first ceramic fire-resistant composite belt wrapping and the second ceramic fire-resistant composite belt wrapping are formed by adopting ceramic fire-resistant silicon rubber and high-temperature-resistant glass fiber cloth as base materials in a pressing and laminating mode.

Advantageous effects

The utility model provides a crosslinked polyethylene insulated flame-retardant environment-friendly power cable with rated voltage of 6-35 kV. The beneficial effects are as follows:

(1) The crosslinked polyethylene insulated flame-retardant environment-friendly power cable with rated voltage of 6-35kV has excellent electrical performance, good heat resistance and flame retardance, chemical corrosion resistance, water resistance, cold resistance, no fall limitation in laying and the like, and is mainly used for nuclear power plants, urban rail transit, high-rise buildings and fields with high requirements on safety and environment protection, and is used for fixedly laying power transmission and distribution energy.

(2) The crosslinked polyethylene insulated flame-retardant environment-friendly power cable with the rated voltage of 6-35kV can be widely applied to sealing occasions such as subways, light rails and the like, and can also be applied to fields with special performance requirements such as waterproof and ultraviolet-proof performances. In a fire state, only a very small amount of flue gas is discharged, no corrosive or harmful gas is generated, the personal safety is effectively ensured, and the system is safer, more reliable and more environment-friendly.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.

Fig. 1 is a cross-sectional view of a power cable of the present utility model.

Legend description:

1. a cable core; 2. an inner semiconductive shield; 3. a crosslinked polyethylene insulating layer; 4. an outer semiconductive shield layer; 5. a copper tape shielding layer; 6. wrapping the ceramic fire-resistant composite belt; 7. a ceramic silicone rubber inner sheath; 8. a fine steel wire armor layer; 9. a low smoke halogen-free polyolefin sheath; 10. a copper wire braid; 11. wrapping a ceramic fire-resistant composite belt; 12. environment-friendly flame-retardant polyethylene sheath.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: as shown in figure 1, a cable core 1 of the cable adopts a copper core or an aluminum alloy conductor, the cable core 1 has three groups, each group of cable cores 1 sequentially comprises an inner semiconductive shielding layer 2, a crosslinked polyethylene insulating layer 3 and an outer semiconductive shielding layer 4 from inside to outside, and the outer layer of the outer semiconductive shielding layer 4 is overlapped with a wrapping copper belt shielding layer 5, so that the cable meets the voltage grade requirement of a use environment.

Twisting each wire core into a cable, filling the cable into a round shape by using a flame-retardant filling strip, and tightly wrapping a wrapping ceramic fire-resistant composite belt by wrapping one 6, wherein the filling strip has high mechanical strength, the tensile strength can reach 15MPa, and the cable can be fully ensured to have a stable structure and a round shape when being cabled; the oxygen index is as high as 30, so that the flame retardant property of the cable can be effectively improved; the ceramic fire-resistant composite belt is wrapped with a first 6 and an environment-friendly flame-retardant polyethylene sheath 12, which are formed by the combination of ceramic fire-resistant silicon rubber and high-temperature-resistant glass fiber cloth as base materials in a delayed manner, and becomes a ceramic shell after hardening at the temperature of above 350 ℃, and the ceramic hard shell can play a good role in flame retardance, fire resistance, fire prevention and fire isolation under the condition of fire, and can reach 3000 ℃ at most, so that the smoothness of a circuit is effectively ensured. The ceramic silicon rubber inner protective layer 7 is extruded outside the wrapping layer, the fine steel wire armor layer 8 is wound, and the ceramic silicon rubber has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, is safe and environment-friendly, plays a role in protecting the inner structure of the cable, and prevents the cable from being crushed by the fine steel wire armor layer 8; the thin steel wire armor layer 8 is used for increasing the mechanical strength of the cable and improving the erosion resistance, so that the cable can be suitable for short-distance overhead laying or vertical laying.

The low smoke zero halogen polyolefin sheath 9 is extruded outside the thin steel wire armor layer 8, the flame retardant, fire resistance and environmental protection performance of the cable are enhanced, and meanwhile, the thin steel wire armor layer 8 protects and serves as an inner cushion layer of the outer shielding layer. The copper wire braid 10 is braided outside the sheath to protect the current or signal from external electromagnetic interference, and to avoid interference of electromagnetic field generated by itself in use to the surrounding environment and current flowing failure. The copper wire weaving layer 10 is externally wound with a ceramic fire-resistant composite belt wrapping two 11 which is used as a fire-blocking layer for protecting the shielding and the inner layer. The outer sheath adopts an environment-friendly flame-retardant polyethylene sheath 12, the material takes polyethylene resin as a base material, and is prepared by adding high-quality high-efficiency flame retardant and other processing aids, mixing, plasticizing and granulating, and has excellent physical and mechanical properties, electrical properties, flame retardant properties, cracking resistance and environment-friendly properties.

The cable can be widely applied to closed occasions such as subways, light rails and the like, and can also be applied to fields with special performance requirements such as waterproof and ultraviolet-proof performances. In a fire state, only a very small amount of flue gas is discharged, no corrosive or harmful gas is generated, the personal safety is effectively ensured, and the system is safer, more reliable and more environment-friendly.

The working principle of the utility model is as follows: the product has excellent electrical properties, good heat resistance and flame retardance, chemical corrosion resistance, water resistance, cold resistance, no fall limitation in laying and the like, and is mainly used for nuclear power plants, urban rail transit, high-rise buildings and fields with high requirements on safety and environment protection, and is used for fixedly laying power transmission and distribution energy.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (4)

1. A6-35 kV rated voltage crosslinked polyethylene insulation flame-retardant environment-friendly power cable is characterized in that: the cable comprises three groups of cable cores (1), wherein the three groups of cable cores (1) are wound to form a cable, a round shape is filled by flame-retardant filling strips, the outermost side of the three groups of cable cores (1) is tightly wrapped by a first wrapping ceramic fire-resistant composite belt, an inner ceramic silicone rubber sheath (7) is extruded, a thin steel wire armor layer (8) is wound, a low-smoke halogen-free polyolefin sheath (9) is extruded, a copper wire weaving layer (10) is woven, an outer layer is wrapped by a second wrapping ceramic fire-resistant composite belt, and an outer sheath adopts an environment-friendly flame-retardant polyethylene sheath (12).

2. The crosslinked polyethylene insulated flame-retardant environment-friendly power cable with rated voltage of 6-35kV according to claim 1, wherein the power cable is characterized in that: the cable core (1) is made of copper cores or aluminum alloy materials.

3. The crosslinked polyethylene insulated flame-retardant environment-friendly power cable with rated voltage of 6-35kV according to claim 1, wherein the power cable is characterized in that: the cable core (1) comprises an inner semiconductive shielding layer (2), a crosslinked polyethylene insulating layer (3), an outer semiconductive shielding layer (4) and an outer layer overlapping wrapping copper strip shielding layer (5) of the outer semiconductive shielding layer (4).

4. The crosslinked polyethylene insulated flame-retardant environment-friendly power cable with rated voltage of 6-35kV according to claim 1, wherein the power cable is characterized in that: the first ceramic fire-resistant composite belt wrapping (6) and the second ceramic fire-resistant composite belt wrapping (11) are formed by adopting ceramic fire-resistant silicon rubber and high-temperature-resistant glass fiber cloth as base materials through the extension and compression compounding.

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