CN201859675U - Nano modified packing polyolefin environment friendly cable - Google Patents

Abstract

The utility model discloses a nano-scale modified filled polyolefin environment-friendly cable. A plurality of insulated wire cores are twisted to form a cable core, and a filling layer is arranged in the gap between the cable cores. The insulated wire core is composed of a conductor, a Composed of mica wrapping refractory layer and insulating layer, it is characterized in that the insulating layer is filled with nano-scale modified polyolefin, and the cable core and the filling layer are coated with water-blocking polypropylene tape, halogen-free low-smoke Glass fiber tape, mica tape refractory layer, oxygen and moisture barrier layer, galvanized steel tape armor layer and sheath layer. The utility model cable has high environmental protection performance, produces less smoke and no harmful halogen acid substances during combustion, has excellent ant-proof performance, fire resistance performance, and radial and axial water resistance performance, etc., and the mechanical strength of the cable higher.

Description

Nanoscale modified filled polyolefin environment-friendly cable

Technical field:

The utility model relates to an electric power cable, in particular to a nano-level modified and filled polyolefin environment-friendly cable.

Background technique:

At present, the cables sold on the market include low-smoke and halogen-free power cables, ant-proof or rodent-proof power cables, waterproof power cables, flame-retardant power cables, fire-resistant power cables, flame-retardant and fire-resistant power cables, etc. The main safety performance of these cables is monotonous. It cannot meet the needs of two or more safety performances; light rail subways, nuclear industry, airports, stations, offshore platforms, hospitals, office buildings and other public places with relatively concentrated personnel, as well as important areas of industrial and mining enterprises require cables to have high environmental performance and high strength. At the same time, these areas are also places where termites or rats are rampant, and the cables are required to have anti-ant and rodent performance. In places where people are concentrated, the cables must also be able to run for a period of time in the event of a fire to ensure that people have enough time to escape. The cable channels in the above places There is more or less water or water vapor in the cable, which requires the cable to have good water resistance and high strength. Therefore, the cable with a single safety performance used in the above places cannot guarantee safe operation.

Invention content:

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a kind of high environmental protection performance, less smoke and no harmful halogen acid substances produced during combustion, excellent anti-ant rodent performance, fire resistance, diameter A cable with high axial water resistance and high mechanical strength.

The utility model solves the technical problem and adopts the following technical solutions:

Nano-scale modified filled polyolefin environment-friendly cable, multiple insulated wire cores are stranded to form a cable core, and a filling layer is arranged in the gap between the cable cores. The insulation layer is made of nano-scale modified filled polyolefin, and the cable core and the filling layer are coated with water-blocking polypropylene tape, halogen-free glass fiber tape, mica tape refractory layer, Oxygen barrier waterproof layer, galvanized steel tape armor layer and sheath layer.

The filling layer is a water-blocking polypropylene yarn filling layer.

The sheath layer is a nanoscale modified filled polyolefin sheath.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

The conductor is tinned copper core conductor of category 5, which can prevent the corrosion of water and other harmful substances; the insulating material is made of nano-scale modified filled polyolefin, which not only has the superior electrical properties of polyethylene, but also has the same characteristics as ordinary Compared with polyethylene, its mechanical properties have been greatly improved, especially the tensile strength is more than ten times that of ordinary polyethylene. In addition, the environmental stress resistance of the material has also been greatly improved. Compared with ordinary polyethylene materials, the environmental stress resistance Poor, insulation cracking is prone to occur during use, but the environmental stress resistance of this new material has been greatly improved, avoiding the phenomenon of insulation cracking during use of the cable, and greatly improving the service life of the cable; filling The layer and its outer layer are made of water-blocking polypropylene yarn and polypropylene tape, with a water absorption capacity of more than 70ml/g, which can effectively prevent water from infiltrating; the oxygen-proof and moisture-proof layer is made of low-smoke halogen-free polyolefin with a high oxygen index, and the oxygen barrier index of this material reaches 50%, and has moisture-proof performance; the armor layer is armored with stainless steel wire and steel tape. This material has high corrosion resistance. Compared with ordinary galvanized steel strip or painted steel strip, its corrosion resistance is greatly improved. The mechanical base has high tensile and pressure resistance and can withstand the mechanical force from the outside during the use of the cable. In addition, the material is also a non-magnetic material, which avoids the hysteresis loss generated during the use of the cable and improves the performance of the cable. The load-bearing capacity; the sheath layer is filled with nano-scale modified ant-proof polyolefin material, which uses anti-rodent and ant repellent extracted from various natural plants, and is added to the cable sheath after multiple compounding In the material, the outer sheath of the cable contains a special odor. After the rodents and ants touch the cable because their sense of smell is stimulated, they dislike contact. The purpose of being destroyed by rat ants. The product of the utility model has very low smoke density during combustion, no corrosive gas escape, no harmful halogen acid substances, anti-termite and mouse bites, and has radial and axial waterproof, high flame-retardant and fire-resistant, insulating machinery The advantages of high strength and strong resistance to environmental stress, as well as various properties such as low cable loss and strong carrying capacity, can be widely used in nuclear power plants, subway stations, telephone exchanges and computer control centers, high-rise buildings, hotels, radio and television stations, hospitals. , Office buildings, important military installations, oil platforms, etc., and places where people are concentrated, are also widely used in temperate and subtropical areas with many rodent ants in my country. In short, this utility model product is a new product integrating environmental protection, water resistance, ant-proof, flame-retardant, fire-resistant, high mechanical strength, strong bearing capacity and other safety performances, and has broad market prospects.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

Numbers in the figure: 1 Conductor, 2 Mica-wrapped refractory layer, 3 Insulation layer, 4 Filling layer, 5 Water-blocking polyester tape, 6 Halogen-free glass fiber tape, 7 Mica tape refractory layer, 8 Oxygen barrier and waterproof layer, 9 Plating Zinc steel tape armor layer, 10 sheath layers.

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

The specific implementation, non-limiting examples are as follows:

Embodiment: As shown in Fig. 1, the conductor 1 adopts the multi-strand soft tin-plated copper wire of the fifth structure to be twisted into a conductive wire core, and the conductor is produced through the following steps: wire drawing-annealing and tinning-bundling-(re-twisting) , the conductor is in the form of bundle twisting, the conductor with a cross-section below 6mm ² is in the form of bundle wires, and the conductor with a cross-section of 6mm ² and above, due to the large cross-section, the number of conductor single wires is too large, and re-twisting is required after the bundle , where the maximum diameter of a single wire in a conductor below 2.5mm ² is 0.16mm, the maximum diameter of a single wire in a conductor of 4-35mm ² is 0.21mm, the maximum diameter of a single wire in a conductor of 50-150mm ² is 0.31mm, and the maximum diameter of a single wire in a conductor above 185mm ² The maximum wire diameter is 0.41mm. The mica tape is wrapped to form the mica-wrapped refractory layer 2. First, two layers of mica tape are overlapped and wrapped on the surface of the conductor, both of which are overlapped and wrapped. The covering rate is controlled between 25% and 35%. It is a polyolefin insulation material with permanent filling. Its production process is completed on the SJ65 extruder, and it is extruded with an extruded tube die. The extrusion temperature varies according to the temperature zone, and the temperature of the fuselage is controlled at 185±10. ℃, the head temperature is controlled at 210±5℃, and the die mouth temperature is controlled at 200±5℃, which can be adjusted appropriately according to the different extrusion equipment and materials. The difference between winter and summer is 10-15℃. The filling layer 4, the water-blocking polypropylene tape 5 and the halogen-free low-smoke glass fiber tape 6 ensure the water resistance, flame retardancy and roundness of the cable, and the halogen-free low-smoke glass fiber tape 6 is wrapped with a mica tape refractory layer 7. The oxygen and moisture-proof layer 8 is produced by extrusion of high flame-retardant, low-smoke, halogen-free polyolefin, and the extrusion method is extruded tube. The galvanized steel tape armor layer 9 adopts a double-layer steel tape gap wrapping method, and this process is realized by a steel tape armoring machine, and the steel tape gap should not be greater than 50% of the bandwidth. The sheath layer 10 is made of nano-scale modified filled rodent-proof and flame-retardant polyolefin sheath layer, which is also extruded by an extruded tube die. The extrusion temperature varies according to the temperature zone, and the temperature of the fuselage is controlled at 120 ±10°C, the head temperature is controlled at 145±10°C, and the die temperature is controlled at 135±5°C. It can be adjusted appropriately according to the different extrusion equipment and materials. The difference between winter and summer is 10-15°C. The production equipment can use different sheath extruders for production according to the size of the outer diameter of the cable: use the SJ90 extruder for the outer diameter of the cable below 35mm, and use the SJ120 extruder for the outer diameter of the cable above 35mm.

Claims (4)

1. nano level modified filled polyolefin environment-friendly cable, the stranded formation cable cores of edge core that thoroughly do away with more, be provided with packed layer (4) in the cable core gap, described insulated wire cores from-inner-to-outer is made of conductor (1), the wrapped flame retardant coating of mica (2) and insulating barrier (3), it is characterized in that, described insulating barrier is made by nano level modified filled polyolefin, is coated with the polypropylene tape that blocks water (5), low smoke, zero halogen glass fibre belt (6), mica tape flame retardant coating (7), oxygen barrier damp-proof layer (8), galvanized steel strip armour (9) and restrictive coating (10) outside described cable core and packed layer successively.

2. nano level modified filled polyolefin environment-friendly cable according to claim 1 is characterized in that described insulating barrier (3) is nano level modified filled polyolefin.

3. nano level modified filled polyolefin environment-friendly cable according to claim 1 is characterized in that described packed layer (4) is the polypropylene yarn packed layer that blocks water.

4. nano level modified filled polyolefin environment-friendly cable according to claim 1 is characterized in that, described restrictive coating (10) is the anti-ant mouse polyolefin of nano level modified filling.

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