CN203085199U - Halogen-free low-smoke flame-retardant heat-resistance anti-interference instrument cable - Google Patents

Abstract

The utility model discloses a halogen-free, low-smoke, flame-retardant, heat-resistant, and anti-interference instrument cable. The insulated wire core is composed of an oxygen-free copper conductor and an irradiated cross-linked polyethylene insulating layer extruded on the conductor, and the insulated wire core is twisted. Or star-twisted wire group, the wire group is overlapped and wrapped with polyester tape, and then braided with oxygen-free copper wire sub-shielding layer to form a shielded wire group, and the sub-shielding layer is overlapped and wrapped with polyester tape. The shielded wires of the ester tape are twisted into a cable core, and the gap between the cable cores is provided with a filling layer; outside the cable core, a polyester tape is overlapped and wrapped, and the overall shielding layer of oxygen-free copper wire is braided, and the total shielding layer is wrapped with a polyester tape. The cable is extruded with an inner sheath, the inner sheath is wrapped with an armor layer, the armor layer is wrapped with a general wrapping layer, and the outermost layer of the cable is extruded with a thermoplastic flame-retardant outer sheath. It has excellent halogen-free, low-smoke, flame-retardant, heat-resistant, anti-interference, corrosion-resistant, tensile and other characteristics, and can be widely used in instrument control and signal in petroleum, petrochemical, subway, high-rise buildings and densely populated public places system.

Description

Halogen-free low-smoke flame-retardant heat-resistant anti-interference instrument cable

Technical field:

The utility model relates to a halogen-free, low-smoke, flame-retardant, heat-resistant and anti-interference instrument cable.

Background technique:

With the improvement of people's awareness of environmental protection and the acceleration of my country's social and economic construction, halogen-free, low-smoke, flame-retardant, heat-resistant, and anti-interference instrument cables are widely used in important departments such as petroleum, petrochemical, high-rise buildings, subways, power plants, nuclear power plants, and tunnels. And the instrument control system in densely populated public places. When a fire occurs, the cable will not release corrosive gas when it burns, and it has good light transmission, which is of great help to rescue work and can reduce casualties and injuries to a large extent. property damage.

The development of domestic halogen-free, low-smoke, flame-retardant, heat-resistant and anti-interference cables started late, and the technical level of various manufacturers is uneven. In addition, the requirements for flame retardancy and environmental protection have become higher and higher in recent years. , It is impossible to design and produce halogen-free, low-smoke, flame-retardant, heat-resistant and anti-interference instrument cable products that meet the technical requirements. This requires manufacturers to break through technical barriers, set up their own R&D team, and develop products with independent intellectual property rights. This will surely drive the rapid development of the enterprise and produce good social and economic benefits.

Invention content:

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a halogen-free, low-smoke, flame-retardant, heat-resistant and anti-interference instrument cable, which has excellent halogen-free, low-smoke, flame-retardant, heat-resistant, Corrosion, tensile and other properties, can be widely used in instrumentation control and signal systems in petroleum, petrochemical, subway, high-rise buildings and densely populated public places. The product has excellent performance and can produce good social and economic benefits.

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

Halogen-free, low-smoke, flame-retardant, heat-resistant and anti-interference instrument cable, the insulated core is composed of an oxygen-free copper conductor and an irradiated cross-linked polyethylene insulating layer extruded on the conductor, and the insulated core is twisted in pairs or star twisted as a wire group. The outside of the wire group is wrapped with overlapping polyester tape and has a wire group wrapping layer, and an oxygen-free copper wire sub-shielding layer is braided outside the wire group wrapping layer to form a shielded wire group. The second wrapping layer is formed by twisting a plurality of shielded wire groups provided with the second wrapping layer into a cable core, and the gap between the cable cores is filled with an inorganic paper rope filling layer;

The polyester tape is used to overlap and wrap the cable core outside the cable core, and the overall shielding layer of oxygen-free copper wire is braided, and the polyester tape is used to overlap and wrap the cable core outside the said general shielding layer. The cladding is extruded with an inner sheath, and the inner sheath is wrapped with a galvanized fine steel wire armor layer, and the outer armor layer is wrapped with a flame-retardant tape overlappingly to form a total wrapping layer. The outermost layer is extruded with a thermoplastic flame-retardant outer sheath.

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

1. The insulation layer of the utility model adopts 125°C irradiation cross-linked polyethylene. After being irradiated and cross-linked by an electron accelerator, the mechanical properties and heat resistance are greatly improved, ensuring that the cable has excellent heat resistance and mechanical properties. At the same time, the operating temperature reaches 125°C. Compared with ordinary instrument cables, it has a higher heat resistance level and a significantly longer service life.

2. In the utility model, the twisted pitch of insulated wire cores is controlled below 100mm, and the pitches of adjacent wire groups are different, which ensures the low inductance and low capacitance characteristics of the cable and the reliability of signal transmission.

3. Both the sub-shielding layer and the overall shielding layer of the utility model adopt an oxygen-free copper wire braided shielding structure, and the braiding density is greater than 80%, which can effectively prevent signal interference between wire groups and external signal interference, and play a very good role. shielding effect.

4. The utility model adopts winding galvanized fine steel wire as the armor layer, which greatly improves the tensile performance and mechanical properties of the cable, effectively protects the inner sheath from damage, and improves the service life of the cable.

5. The inner and outer sheaths of extruded thermoplastic low-smoke, halogen-free and high-flame-retardant polyolefin in the utility model are a new type of environmentally friendly flame-retardant material, which has excellent low-smoke, halogen-free, flame-retardant, heat-resistant, lead-free, Fluorine-free, alkali-free, anti-corrosion and other characteristics, fully meet the requirements of use.

Description of drawings:

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

Labels in the figure: 1 conductor, 2 insulation layer, 3 wire group wrapping layer, 4 sub-shielding layer, 5 second wrapping layer, 6 filling layer, 7 inner wrapping layer of cable core, 8 total shielding layer, 9 cable core Outer cladding, 10 inner sheaths, 11 armor layers, 12 total wrapping layers, 13 outer sheaths.

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

Detailed ways:

Embodiment: Referring to Fig. 1, the halogen-free, low-smoke, flame-retardant, heat-resistant and anti-interference instrument cable of this embodiment consists of an oxygen-free copper conductor 1 and an irradiated cross-linked polyethylene insulating layer 2 extruded on the conductor to form an insulated core , the insulated wire core is twisted or star twisted as a wire group, and the outer layer of the wire group is wrapped with a polyester tape overlapping the wire group wrapping layer 3, and the wire group winding layer 3 is braided with an oxygen-free copper wire sub-shielding layer 4 to form a shielded wire The second wrapping layer 5 is wrapped with a polyester tape outside the sub-shielding layer, and a plurality of shielded wire groups with the second wrapping layer are twisted into a cable core, and the gap between the cable cores is filled with an inorganic paper rope filling layer 6.

Outside the cable core, polyester tape is used to overlap and wrap the inner cladding layer 7 of the cable core, and the overall shielding layer 8 of oxygen-free copper wire is braided. 9. An inner sheath 10 is extruded, and the inner sheath is wrapped with a thin galvanized steel wire armor layer 11, and the outer armor layer is wrapped with a flame-retardant tape overlappingly to form a total wrapping layer 12, the outermost of the cable The layers are extruded with a thermoplastic flame retardant outer sheath 13 .

In the specific implementation, the corresponding structural settings and material selection are as follows:

Conductor 1 is an oxygen-free copper conductor, and the surface of the conductor layer should be smooth and free of burrs;

The insulation layer 2 is a conductor extruded cladding layer formed by extruding radiation cross-linked polyethylene on the conductor, and is cross-linked by electron radiation;

The wrapping layer 3 of the wire group is wrapped with high-temperature and high-insulation polyester tape;

The sub-shielding layer 4 adopts an oxygen-free copper wire braided structure;

The second wrapping layer 5 outside the sub-shielding layer is wrapped with high-temperature and high-insulation polyester tape;

Filling layer 6 adopts halogen-free low-smoke flame-retardant inorganic paper rope filling layer, and the filling is dense and round;

The inner wrapping layer 7 of the cable core is wrapped with high-temperature and high-insulation polyester tape;

The overall shielding layer 8 adopts an oxygen-free copper wire braided structure;

The outer wrapping layer 9 of the cable core of the total shielding layer is wrapped with a high-temperature and high-insulation polyester tape;

The inner sheath 10 is made of extruded thermoplastic low-smoke, halogen-free and highly flame-retardant polyolefin;

The armor layer 11 adopts a wound galvanized thin steel wire structure;

The total wrapping layer 12 is wrapped outside the armor layer by overlapping and wrapping with halogen-free high flame-retardant tape;

The outer sheath 13 is made of extruded thermoplastic low-smoke halogen-free high flame-retardant polyolefin.

Claims (1)

1. the heat-resisting anti-interference instrument cable of LSOH anti-flaming, it is characterized in that constituting insulated wire cores by oxygen-free copper conductor (1) and the IXPE insulating barrier (2) that extrudes on conductor, insulated wire cores pair twist or star quad stranding are the line group, the line group adopts the overlapping wrapped wired group of lapping layer of polyester belt (3) outward, the outer copper free wire sub-shield (4) that is woven with of online group of lapping layer (3) forms the shielding conductor group, described sub-shield adopts overlapping second lapping layer (5) that is surrounded with of polyester belt outward, be twisted into cable core by a plurality of shielding conductor groups that are provided with second lapping layer, the cable core gap is filled with inorganic paper string packed layer (6);

Outside described cable core, adopt the overlapping lapping layer in the cable core (7) that is surrounded with of polyester belt, be woven with the total screen of copper free wire (8), outside described total screen, adopt the overlapping lapping layer outside the cable core (9) that is surrounded with of polyester belt, be extruded with inner sheath (10), described inner sheath is wound with seizing wire armour (11) outward, outside described armour and adopt the overlapping total lapping layer (12) that is surrounded with of fire-retardant band, the outermost layer of cable is extruded with thermoplastic flame-proof oversheath (13).

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