CN212434282U - Low-temperature-resistant high-flexibility special cable - Google Patents

Abstract

A low temperature resistant high flexibility special cable, its structure is: a plurality of wire cores and hemp ropes are twisted around an axis L to form a cable core, and the twisting pitch-diameter ratio is 12-20 times; the cable core is sequentially wrapped with a halogen-free tape layer and an outer sheath; 1 hemp rope is arranged between adjacent wire cores at intervals; the hemp rope is formed by twisting a plurality of hemp threads, and the outer diameter range of the hemp rope is 1.6 mm-6.0 mm. The wire core is formed by a conductor wrapped with an insulating layer; the conductor is a category 5 flex-resistant copper conductor meeting IEC60228 requirements; the insulating layer is made of tensile silicon rubber insulating materials, and the nominal thickness range is 1.0-1.3 mm; the outer sheath is made of polyurethane sheath materials, and the nominal thickness range of the outer sheath is 1.8-2.2 mm. The cable round has the characteristics of good tensile property, low temperature resistance, oil resistance and wear resistance, and meanwhile, the cable also has the characteristics of excellent acid resistance, alkali resistance, corrosion resistance, high flexibility and the like.

Description

Low-temperature-resistant high-flexibility special cable

Technical Field

The utility model relates to a low temperature resistant high flexibility special type cable, in particular to low temperature resistant high flexibility special type cable belongs to cable technical field.

Background

In some high-cold and high-altitude areas or some ultralow-temperature environments, the conventional low-temperature-resistant cable can only reach-40 ℃, the use requirement cannot be met, and the cable in the extremely low-temperature environment is accompanied with a complex working environment, such as large mechanical equipment used outdoors, and most of the cables are in a heavy oil pollution environment when in use; the cable is often dragged, and under the condition of extremely low temperature, the cable has excellent wear resistance and certain tensile property; to meet the installation requirements, the cable needs high flexibility.

Due to extreme environmental limitation, the cable is required to have excellent low temperature resistance (minus 60 ℃), wear resistance, oil resistance and certain tensile property, and simultaneously has the characteristics of acid resistance, alkali resistance, corrosion resistance, high flexibility and the like. This makes the overall design of the cable very difficult.

Disclosure of Invention

The utility model aims at providing a low temperature resistant high flexibility special type cable, it not only requires to have good electrical property, oil resistance, low temperature resistance can and excellent acidproof, alkali-proof, corrosion-resistant, characteristics such as high softness, has excellent wear resistance simultaneously. In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a low temperature resistant high flexibility special cable, its structure is: a plurality of wire cores and hemp ropes are twisted around an axis L to form a cable core, and the twisting pitch-diameter ratio is 12-20 times; the cable core is sequentially wrapped with a halogen-free tape layer and an outer sheath;

if the number of the wire cores is more than 2, 1 hemp rope is arranged between the adjacent wire cores at an interval, and 1 hemp rope is arranged at the position of an axis L; 2 wire cores are arranged, and 1 hemp rope is arranged between every two adjacent wire cores;

the hemp rope is formed by twisting a plurality of hemp threads, and the outer diameter range of the hemp rope is 1.6 mm-6.0 mm.

The wire core is formed by a conductor wrapped with an insulating layer;

the conductor is a category 5 flex-resistant copper conductor meeting IEC60228 requirements;

the insulating layer is made of tensile silicon rubber insulating materials, and the nominal thickness range is 1.0-1.3 mm;

the outer sheath is made of polyurethane sheath materials, and the nominal thickness range of the outer sheath is 1.8-2.2 mm.

Preferably:

the conductor is formed by twisting a plurality of thin copper wires, and the twisting pitch diameter ratio is 20-25 times;

the thin copper wire is a bare copper monofilament, and the diameter of the thin copper wire is phi 0.193 mm-phi 0.243 mm.

The insulating layer and the outer sheath are both of an extruded structure.

The halogen-free belt layer is formed by overlapping and wrapping halogen-free belts, the covering rate is not less than 25%, and the nominal thickness of the halogen-free belts is 0.2 mm.

The overlapping rate of the halogen-free tapes lapped and lapped is 28-35%.

After the technical scheme is adopted, the utility model discloses following beneficial effect has:

the conductor adopts a category 5 bare copper conductor, so that the flexibility is high, and the bending radius of the cable is greatly reduced; the insulation is made of tensile silicon rubber insulation materials, so that the cable has excellent electrical performance and mechanical performance, and meanwhile, has excellent ageing resistance, and the service life of the cable is greatly prolonged; the outer sheath is made of polyurethane sheath materials, has excellent wear resistance, low temperature resistance and oil resistance, and has the properties of acid resistance, alkali resistance, corrosion resistance, high flexibility and the like.

The hemp rope has advantages such as intensity height, light in weight, extension are little, fills the tensile property that the hemp rope can effectual promotion cable to adopt the effectual weight that has lower the cable of wire tensile type cable, the hemp rope has the characteristics of difficult extension simultaneously, can bear more pulling forces when the atress, protection sinle silk that can be better.

The cable with the structure has excellent low-temperature resistance, can be used in extreme weather and environment at minus 60 ℃, and is suitable for high altitude and alpine regions.

The cable has good oil resistance and high flexibility, can be installed in heavy oil polluted environments and narrow areas, has excellent wear resistance and certain tensile property, can withstand dragging and long-term friction, and is particularly suitable for being used in complex environments.

Drawings

Fig. 1 is a schematic view of the radial cross section structure of the present invention.

In the figure: 1. conductor, 2, insulating layer, 3, sinle silk, 4, hemp rope, 5, cable core, 6, no halogen tape layer, 7, oversheath.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Embodiment example as shown in fig. 1, the low temperature resistant high flexibility special cable of this example has the structure: a conductor 1 coated with an insulating layer 2 forms a wire core 3; 4 wire cores 3 and hemp ropes 4 are twisted to form a cable core 5; the cable core 5 is coated with a halogen-free tape layer 6; the halogen-free belt layer 6 is extruded with sheath materials to form an outer sheath 7;

the conductor is a bending-disturbance-resistant 5-class soft conductor which meets the requirements of IEC60228 and is formed by stranding a plurality of thin copper wires, and the stranding pitch diameter ratio is 20-25. The insulating layer is made of tensile silicon rubber insulating material (such as HJ-80B), and the nominal thickness range is 1.0-1.3 mm. The outer sheath is made of polyurethane sheath materials, and the nominal thickness of the outer sheath is 1.8-2.2 mm.

In the actual use process, in order to make the best effect, the embodiment further proposes on the basis of the foregoing: the nominal diameter range of the single wire of the conductor 1 is phi 0.193 mm-phi 0.243mm, the bare copper conductor is formed by twisting a plurality of bare copper single wires, and the twist pitch diameter ratio is 20-25; the insulating layer 2 adopts a thin-wall extrusion process structure, and the nominal thickness range is 1.0-1.3 mm; the stranding pitch diameter ratio of the cable core 5 is 12-20 times, the halogen-free covering belt layer is formed by overlapping and wrapping halogen-free belts, the nominal thickness of the halogen-free covering belt is 0.2mm, and the covering rate is not less than 25% (for the sake of thickness and mechanical performance, the covering rate is preferably 28-35%).

The cable is round, the tensile property of the cable is improved by the hemp rope, the cable has better low-temperature resistance, oil resistance and wear resistance by the outer sheath, and meanwhile, the cable also has the characteristics of excellent acid resistance, alkali resistance, corrosion resistance, high flexibility and the like.

The cable of the present example was tested to have the following properties:

has good mechanical property, and the insulating tensile strength is more than or equal to 12.5N/mm²The elongation at break is more than or equal to 500 percent; the tensile strength of the sheath is more than or equal to 45.0N/mm²And the elongation at break is more than or equal to 600 percent.

Has high flexibility and bending radius not less than 6D (D is the diameter of the cable).

The cable has good wear resistance, the cable is scraped and ground in the length direction of the cable at the temperature of 20 +/-5 ℃, the scraping and grinding device scrapes and grinds 100000 times at the frequency of 55 +/-5 times/min, and the electrical performance of the cable is good.

Has excellent low temperature resistance, and the outer sheath stretches at the low temperature of minus 60 ℃ for 16h and the low temperature is more than or equal to 110 percent.

The oil-resistant rubber has excellent oil resistance, the outer sheath of the oil-resistant rubber is immersed in IRM902 oil at 100 ℃ for 24 hours, and the change rate of the tensile strength and the change rate of the elongation at break of the oil-resistant rubber do not exceed 30 percent.

The utility model discloses be not limited to above-mentioned embodiment, the technical scheme that all adopt equal or equivalent replacement to form all falls into the protection scope of the utility model.

Claims (6)

1. The utility model provides a high flexible special cable of low temperature resistant, its characterized by structure is:

a plurality of wire cores (3) and hemp ropes (4) are twisted around an axis L to form a cable core (5), and the twisting pitch-diameter ratio is 12-20 times; a halogen-free tape layer (6) and an outer sheath (7) are sequentially wrapped outside the cable core (5);

when the number of the wire cores (3) is larger than 2, 1 hemp rope (4) is arranged between every two adjacent wire cores (3), and 1 hemp rope (4) is arranged at the position of an axis L; 2 cable cores (3) are arranged, and 1 hemp rope (4) is arranged between every two adjacent cable cores (3);

the hemp rope is formed by twisting a plurality of hemp threads, and the outer diameter range of the hemp rope is 1.6 mm-6.0 mm;

the wire core is formed by a conductor (1) wrapped with an insulating layer (2);

the conductor is a category 5 flex-resistant copper conductor meeting IEC60228 requirements;

the insulating layer is made of tensile silicon rubber insulating materials, and the nominal thickness range is 1.0-1.3 mm;

the outer sheath is made of polyurethane sheath materials, and the nominal thickness range of the outer sheath is 1.8-2.2 mm.

2. The special cable with low temperature resistance and high flexibility as claimed in claim 1, wherein: the conductor is formed by twisting a plurality of thin copper wires, and the twisting pitch diameter ratio is 20-25 times.

3. The special cable with low temperature resistance and high flexibility as claimed in claim 2, wherein: the thin copper wire is a bare copper monofilament, and the diameter of the thin copper wire is phi 0.193 mm-phi 0.243 mm.

4. The special cable with low temperature resistance and high flexibility as claimed in claim 1, wherein: the insulating layer (2) and the outer sheath (7) are both of an extruded structure.

5. The special cable with low temperature resistance and high flexibility as claimed in claim 1, wherein: the halogen-free belt layer (6) is formed by overlapping and wrapping halogen-free belts, the covering rate is not less than 25%, and the nominal thickness of the halogen-free belts is 0.2 mm.

6. The special cable with low temperature resistance and high flexibility as claimed in claim 5, wherein: the overlapping rate of the halogen-free tapes lapped and lapped is 28-35%.

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