CN201117327Y - Low-smoke, halogen-free and low-toxic cross-linked polyolefin sheathed cables for ships - Google Patents

Abstract

The utility model relates to a low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships, which is characterized in that it comprises an outer sheath (10) extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material, The inner wall of the outer sheath (10) is sequentially provided with a braided shielding armor layer (11) and an inner sheath (6) extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material, and the inner sheath (6) is extruded A conductor (1) wrapped by cross-linked polyethylene insulation (3), and a special mica tape laminated wrapping refractory layer (2) is also arranged between the insulation (3) and the conductor (1). The product of the utility model has the characteristics of high working temperature grade, good mechanical performance, strong fire resistance, good flame retardancy, excellent oil resistance, strong anti-interference ability and superior safety performance.

Description

Low-smoke, halogen-free and low-toxic cross-linked polyolefin sheathed cables for ships

technical field

The utility model relates to a low-smoke, halogen-free, low-toxic cross-linked polyolefin sheath mainly used in various types of warships, river and sea ships and other water structures, equipment, instruments and instruments for energy transmission, signal control, and information communication. cable.

Background technique

With the rapid development of river, sea and ocean transportation industries and national defense projects, various types of ships and offshore oil platforms are also increasing, and the technical requirements of various types of equipment for cables are increasing. Ethylene-propylene rubber or polyvinyl chloride sheaths are widely used in traditional marine or marine cables. The normal operating temperature of this type of cable is relatively low, generally around 70°C. The cable sheath has poor mechanical properties, tear resistance, fire resistance and flame retardancy. When the flame burns, it releases more toxic and harmful smoke, and the content of halogen acid gas is relatively large, which poses great harm to the health of personnel. The secondary damage to important equipment and precision instruments and meters is relatively large, and the oil resistance of the sheath is poor, which does not meet the requirements of high safety and high reliability in harsh environments.

Contents of the invention

In order to solve the above-mentioned problems existing in traditional marine or ship-used cables, the utility model product provides a higher working temperature level for the marine field, good mechanical properties, strong fire resistance, good flame retardancy, excellent oil resistance, anti-interference ability and safety Low-smoke, halogen-free, low-toxic and environment-friendly JH series ships with low-smoke XLPE insulated non-watertight communication cables, JK series ships with low-smoke XLPE insulated non-watertight control cables and J series ships 0.6/1(1.2)kV non-watertight power cables are insulated with low-smoke XLPE.

The purpose of this utility model is to achieve through the following measures:

The utility model is a low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships, which is characterized in that it includes an outer sheath 10 extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material. The inner wall of the sheath 10 is sequentially provided with a braided shielding armor layer 11 and an inner sheath 6 extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material, and the inner sheath 6 is extruded from a cross-linked polyethylene insulation layer. The conductor 1 wrapped by the layer 3, and the refractory layer 2 is wrapped with a special mica tape laminate between the insulating layer 3 and the conductor 1.

In the low-smoke, halogen-free, low-toxicity cross-linked polyolefin sheathed cable for ships, the braided shielding armor layer 11 is sequentially composed of the outer braided shielding armor layer 9, the shielding insulating layer 8 and the inner braided armor layer 11 from the outside to the inside. The shielding armor layer 7 consists of or only one braided shielding armor layer 11 .

The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships is characterized in that a conductor 1 is wrapped by an insulating layer 3 to form a wire core, and two or more cores are twisted according to a concentric twisting method. After being combined, the wrapping layer 5 is formed by wrapping evenly with a tie band, or the wrapping layer 5 is formed by wrapping evenly with a tie band directly on the outside of a core.

The low-smoke, halogen-free, low-toxicity cross-linked polyolefin sheathed cable for ships is characterized in that a conductor 1 is wrapped by an insulation 3 and then externally braided and wrapped with a sub-shield 4 to form a wire core, and two or more cores are concentric Twisting method is carried out after stranding, and then the wrapping layer 5 is formed by wrapping evenly with a tie band, or the wrapping layer 5 is formed by wrapping evenly outside a core directly with a tie tie.

The low-smoke, halogen-free, low-toxicity cross-linked polyolefin sheathed cable for ships is characterized in that two or three conductors 1 wrapped with insulation 3 are twisted, and then a separate shield 4 is provided on the outside to form a shield group. Or multiple groups are twisted according to the concentric twisting method and then evenly wrapped with a tie band to form a wrapping layer 5, or the outside of a group of shielding groups is directly wrapped evenly with a tie band to form a wrapping layer 5.

The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships is characterized in that the inner braided shielding armor layer 7 and the outer braided shielding armor layer 9 are braided with tinned copper wires.

The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships is characterized in that it is wrapped with an insulating tape or extruded with an insulating material to shield the insulating layer 8. The insulating material can be polyolefin material, and the insulating tape can be It is PP insulation tape.

The low-smoke, halogen-free and low-toxic cross-linked polyolefin sheathed cable for ships is characterized in that the sub-shield 4 is braided by multiple strands of tinned copper wires.

The low-smoke, halogen-free and low-toxic cross-linked polyolefin sheathed cable for ships is characterized in that it adopts a concentric twisted conductor 1 of multiple strands of tinned copper wires.

The low-smoke, halogen-free and low-toxic cross-linked polyolefin sheathed cable for ships is characterized in that the inner sheath 6 and the outer sheath 10 are cross-linked by electron accelerator irradiation.

The beneficial effects of the utility model:

The product of the utility model adopts a special structure and special materials, and the product has the following characteristics:

(1) Stable and reliable structure: the conductor is concentrically stranded by multiple tinned copper wires, and the stranded structure is tight and stable.

(2) Good fire-resistant performance: special high-temperature-resistant non-combustible mica tape is used to wrap the refractory layer to improve the fire-resistant performance of the cable.

(3) Good mechanical properties: Polyethylene and cross-linked polyolefins are irradiated and cross-linked to transform the original linear molecules into body-shaped structures, improving the mechanical properties and temperature resistance of the cable.

(4) Low-smoke, halogen-free and low-toxic: insulation, sheath and filling materials are all made of low-smoke, halogen-free and low-toxic materials. When the cable is burned by flame, the amount of smoke is small, and the release of acid gas and toxic gas is small.

(5) Good flame retardant performance: the cable sheath is made of special materials, which form a hard shell when burning, which hinders the intrusion of oxygen and the precipitation of the decomposition gas of the sheath material, prevents the flame from continuing to burn, and enables the cable to meet the requirements of Class A vertical bunching combustion.

(6) Heat-resistant oil: the sheath can be dipped in 20# engine oil at 121±2°C for 18 hours, and the tensile strength and fracture growth rate are compared with those before dipping, and the retention rate is ≥50%.

(7) Tear resistance: The sheath is made of special cross-linked polyolefin material, cross-linked by irradiation, so that the molecules are entangled and adhered to each other, so that the sheath has strong tear resistance.

(8) Strong anti-interference ability: tinned copper wire braided sub-shield is used outside the insulated core, tinned copper wire braided double overall shield is used outside the cable core, and a shielding insulation layer is added between the double overall shields to improve shielding Signal attenuation, which improves the ability to resist external interference.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

Fig. 2 is a structural schematic diagram of Embodiment 2 of the present utility model.

Fig. 3 is a schematic structural view of Embodiment 3 of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

Example 1

Combined with Figure 1, the utility model product includes an outer sheath 10 extruded from a low-smoke, halogen-free, low-toxic cross-linked polyolefin material, and the inner wall of the outer sheath 10 is provided with a braided shielding armor layer 11 and a low-smoke, halogen-free, low-toxicity Inner sheath 6 extruded from toxic cross-linked polyolefin material, conductor 1 wrapped by cross-linked polyethylene insulating layer 3 is arranged inside inner sheath 6, and special mica tape lamination is arranged between insulating layer 3 and conductor 1 Wrap the refractory layer 2. A conductor 1 is wrapped by insulation 3 to form a wire core, and two or more cores are twisted according to the concentric twisting method, and then wrapped evenly with a strap to form a wrapping layer 5, or a strap is directly used outside a core Uniform wrapping forms the wrapping layer 5 .

This embodiment can be manufactured through the following process:

(1) Multi-strand tinned copper wire concentric stranded conductor 1 is adopted;

(2) Special mica tape is used to evenly wrap the refractory layer 2 outside the conductor 1;

(3) The refractory layer 2 is extruded and wrapped with low-smoke, halogen-free and low-toxicity cross-linked polyethylene insulation 3, and the insulation 3 is irradiated;

(4) A conductor 1 is wrapped by refractory layer 2 and insulation 3 from the inside to the outside to form a wire core. Two or more cores are twisted according to the concentric twisting method and then wrapped evenly with a tightening tape to form a winding. The wrapping layer 5 or the outer part of a core is directly wrapped with a tightening tape to form the wrapping layer 5;

(5) Low-smoke, halogen-free and low-toxicity cross-linked polyolefin material is used to extrude the inner sheath 6;

(6) Tinned copper wire braided braided shielding armor layer 11 is used after cabling;

(7) Extrude the outer sheath 10 by using low-smoke, halogen-free and low-toxic cross-linked polyolefin material outside the core wire, and irradiate and cross-link the outer sheath through special equipment.

Example 2

Combined with Figure 2, the utility model product includes an outer sheath 10 extruded from low-smoke, halogen-free, low-toxic cross-linked polyolefin material, and the inner wall surface of the outer sheath 10 is provided with a braided shielding armor layer 11 and a low-smoke, zero-halogen, low-toxicity Inner sheath 6 extruded from toxic cross-linked polyolefin material, conductor 1 wrapped by cross-linked polyethylene insulating layer 3 is arranged inside inner sheath 6, and special mica tape lamination is arranged between insulating layer 3 and conductor 1 Wrap the refractory layer 2. A conductor 1 is wrapped by insulation 3 and then externally braided and wrapped with sub-shield 4 to form a wire core. Two or more cores are twisted according to the concentric twisting method and then evenly wrapped with a binding tape to form a wrapping layer 5 or a The outside of the core is directly wrapped with a tie band evenly to form a wrapping layer 5 .

The utility model can be manufactured through the following process:

(1) Multi-strand tinned copper wire concentric stranded conductor 1 is adopted;

(2) Special mica tape is used to evenly wrap the refractory layer 2 outside the conductor 1;

(3) The refractory layer 2 is extruded and wrapped with low-smoke, halogen-free and low-toxicity cross-linked polyethylene insulation 3, and the insulation 3 is irradiated;

(4) Using multi-strand tinned copper wire braiding components to shield 4 structures;

(5) A conductor 1 is wrapped by refractory layer 2 and insulation 3 from the inside to the outside in turn, and then the outside is braided and wrapped with sub-shield 4 to form a core. Two or more cores are twisted according to the concentric twisting method and then tied. The wrapping layer 5 is formed by evenly wrapping the tightening tape, or the wrapping layer 5 is formed by evenly wrapping the wrapping tape directly on the outside of a core;

(6) Low-smoke, halogen-free, low-toxicity cross-linked polyolefin material is used to extrude the inner sheath 6;

(7) Tinned copper wire braided braided shielding armor layer is used after cabling;

(8) Extrude the outer sheath 10 with low-smoke, halogen-free and low-toxic cross-linked polyolefin material outside the core wire, and irradiate and cross-link the outer sheath through special equipment.

Example 3

In conjunction with Fig. 3, the utility model includes an outer sheath 10 extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material, and the inner wall of the outer sheath 10 is provided with an outer braided shielding armor layer 9, a shielding insulation Layer 8, inner braided shielding armor layer 7 and inner sheath 6 extruded from low-smoke, zero-halogen, low-toxicity cross-linked polyolefin material, and inside the inner sheath 6 is low-smoke, zero-halogen, low-toxicity cross-linked polyethylene insulating layer 3 Wrapped conductor 1; a special mica tape laminated wrapping refractory layer 2 is provided between the insulating layer 3 and the conductor 1; two or three insulating 3-wrapped conductors 1 are twisted, and a sub-shield 4 is provided outside to form a shielding group One group of shielding groups is uniformly wrapped with binding tape to form the wrapping layer 5, and two or more groups of shielding groups are twisted according to the concentric twisting method.

The utility model can be manufactured through the following process:

(1) Multi-strand tinned copper wire concentric stranded conductor 1 is adopted;

(2) Special mica tape is used to evenly wrap the refractory layer 2 outside the conductor 1;

(3) The refractory layer 2 is extruded and wrapped with low-smoke, halogen-free and low-toxicity cross-linked polyethylene insulation 3, and the insulation 3 is irradiated;

(4) Twisting two or three conductors wrapped by refractory layer 2 and insulation 3 from inside to outside;

(5) Using multi-strand tinned copper wire braiding components to shield 4 structures;

(6) Twisting two or three conductors 1 wrapped by refractory layer 2 and insulation 3 from the inside to the outside, and then the outside is provided with sub-shielding 4 to form a shielding group, and two or more groups of shielding groups are twisted concentrically Method After twisting, the exterior is evenly wrapped with a strap to form the wrapping layer 5, or the exterior of a group of shielding groups is directly wrapped with a strap to form the wrapping layer 5.

(7) The inner sheath 6 is extruded by low-smoke, halogen-free and low-toxicity cross-linked polyolefin material;

(8) Tinned copper wire braided inner braided shielding armor layer 7 is used after cabling;

(9) Double-layer shielding structure is adopted, and the inner and outer braided shielding armor layers are wrapped with insulating tape or extruded with insulating materials as the shielding insulation layer 8;

(10) Tinned copper wire is used to braid the outer braided shielding armor layer 9;

(11) Extrude the outer sheath 10 with low-smoke, halogen-free and low-toxic cross-linked polyolefin material outside the core wire, and irradiate and cross-link the outer sheath through special equipment.

Claims (10)

1. A low-smoke, halogen-free, low-toxicity cross-linked polyolefin sheathed cable for ships, which is characterized in that it includes an outer sheath (10) extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material. The inner wall of the sleeve (10) is sequentially provided with a braided shielding armor layer (11) and an inner sheath (6) extruded from a low-smoke, halogen-free, low-toxicity cross-linked polyolefin material, and the inner sheath (6) is extruded and exchanged. A conductor (1) wrapped with polyethylene insulation (3), and a special mica tape laminated wrapping refractory layer (2) is also arranged between the insulation (3) and the conductor (1). 2. The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships according to claim 1, the braided shielding armor layer (11) is sequentially from the outside to the inside by the outer braiding shielding armor layer ( 9), the shielding insulation layer (8) and the inner braided shielding armor layer (7) consist of or only one layer of braided shielding armor layer (11). 3. The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships according to claim 1, characterized in that a conductor (1) consists of a refractory layer (2) and an insulation layer (3) from the inside to the outside. ) to form a wire core after wrapping, two cores or multiple cores are twisted according to the concentric stranding method, and then the wrapping layer is formed by wrapping evenly with a strap Around the cladding (5). 4. The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships according to claim 1, characterized in that a conductor (1) is wrapped by insulation (3) and then externally braided and wrapped with separate shielding (4 ) to form a wire core, two cores or multiple cores are twisted according to the concentric stranding method, and then the wrapping layer is evenly wrapped with a tie band (5) or the outside of one core is directly wrapped evenly with a tie band to form a wrapping layer (5). 5. The low-smoke, halogen-free, low-toxicity cross-linked polyolefin sheathed cable for ships according to claim 1, characterized in that two or three conductors (1) wrapped with insulation (3) are twisted and then externally installed There are sub-shielding (4) to form a shielding group, two or more groups are twisted according to the concentric twisting method and then evenly wrapped with a binding tape to form a wrapping layer (5) or a group of shielding groups are directly used with a binding tape evenly Wrapping forms a wrapping layer (5). 6. The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships according to claim 2, which is characterized in that the inner braided shielding armor layer (7) and the outer braided shielding armoring layer are braided with tinned copper wires layer (9). 7. The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships according to claim 2, characterized in that the shielding insulation layer (8) is wrapped with insulating tape or extruded with insulating material. 8. The low-smoke, halogen-free and low-toxic cross-linked polyolefin sheathed cable for ships according to claim 4 or 5, characterized in that the individual shields (4) are braided with multiple strands of tinned copper wires. 9. The low-smoke, halogen-free, low-toxic cross-linked polyolefin sheathed cable for ships according to claim 1, which is characterized in that it adopts multiple tinned copper wire concentric stranded conductors (1). 10. The low-smoke, halogen-free and low-toxicity cross-linked polyolefin sheathed cable for ships according to claim 1, characterized in that the inner sheath (6) and the outer sheath (10) are cross-linked by electron accelerator irradiation.

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