CN211376222U

CN211376222U - Thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible cable for power distribution

Info

Publication number: CN211376222U
Application number: CN201922091559.0U
Authority: CN
Inventors: 周志浩
Original assignee: WUXI MINGZHU CABLE CO Ltd
Current assignee: WUXI MINGZHU CABLE CO Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-08-28
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses a thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible cable for power distribution, which comprises a cable core, wherein the cable core is formed by twisting a plurality of power wire cores and steel wire rope filling strips with the same quantity as the power wire cores; directly extruding an oil-resistant low-temperature-resistant cross-linked polyolefin rubber outer sheath outside the cable core; the power wire core is composed of a conductor, a cross-linking weather-resistant high-voltage ethylene propylene diene monomer rubber insulating layer extruded outside the conductor, an insulating isolation layer wrapped outside the cross-linking weather-resistant high-voltage ethylene propylene diene monomer rubber insulating layer, a metal shielding layer woven outside the insulating isolation layer and an isolation layer wrapped outside the metal shielding layer. The cable has the characteristics of oil resistance, low temperature resistance, high flexibility and the like, is soft in structure, stable in performance, outstanding in tensile strength of a finished cable, stable in electrical performance in a complex environment, good in electric field shielding performance, excellent in low temperature resistance, long in service life and the like, and can completely meet the requirements of the cable in a low-temperature environment.

Description

Thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible cable for power distribution

Technical Field

The utility model relates to a wire and cable field specifically indicates a multicore flexible cable is used in high strength distribution of resistant low temperature of thermosetting resistant oil.

Background

At present, domestic low-temperature-resistant cable production enterprises gradually increase, and Shanghai areas extend from more than 50 to more than 200 in the past, so that the market popularity of the low-temperature-resistant cables is extremely high, and the temperature is lowered to minus dozens of degrees in winter in the northern area or the southern area, and at this time, the construction cables must be made of the low-temperature-resistant cables. Because the conventional cable cannot be corroded by low cold temperature, the cable can be short-circuited and broken in a period of time, and disasters caused by fire can be caused seriously;

in fact, the domestic low-temperature-resistant cable industry is in a rapid development period, in the special period, the market is certainly increased, the requirements in all aspects are also certainly expanded, and the using requirement and the purchasing requirement of the low-temperature-resistant cable exceed about 15 percent in the same period;

furthermore, with the rapid development of the new energy industry, the market of low-temperature resistant cable products for new energy is not small, and for nuclear power, government support obtained by the new energy industry is more and more in the next several years; the use cost of new energy is continuously reduced due to the technical progress, and the economic value and the social environmental protection benefit are increasingly prominent. In addition, the development of cities drives the development of urban rail transit, and the application of various low-temperature-resistant cables is promoted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a thermosetting resistant oily low temperature resistant high strength multicore flexible cable for distribution is provided, has resistant oily, low temperature resistant, characteristics such as high soft bending nature, and cable construction is soft, the stable performance, and finished cable tensile strength is outstanding, and electric performance is stable under the complex environment, and electric field shielding performance is good, and low temperature resistant performance is excellent, characteristics such as life is longer can satisfy the use under the cable low temperature environment completely.

In order to achieve the above object, the utility model adopts the following technical scheme: a thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible cable for power distribution comprises a cable core, wherein the cable core is formed by stranding a plurality of power wire cores and steel wire rope filler strips with the same number as the power wire cores; directly extruding an oil-resistant low-temperature-resistant cross-linked polyolefin rubber outer sheath outside the cable core; the power wire core is composed of a conductor, a cross-linking weather-resistant high-voltage ethylene propylene diene monomer rubber insulating layer extruded outside the conductor, an insulating isolation layer wrapped outside the cross-linking weather-resistant high-voltage ethylene propylene diene monomer rubber insulating layer, a metal shielding layer woven outside the insulating isolation layer and an isolation layer wrapped outside the metal shielding layer.

In a further improvement, the conductor is formed by twisting a plurality of strands.

In a further improvement, the stranded wire is formed by twisting a plurality of high-flexibility oxygen-free tinned copper wires with the copper purity of 99.96 percent and a plurality of thin steel wires with the diameter of 0.16mm in the same direction, wherein the steel wires can play a role in reinforcement.

The further improvement is that the steel wire rope filling strip is composed of a steel wire rope and a rubber layer extruded outside the steel wire rope.

The further improvement is that the insulation isolation layer is an aluminum-plastic composite belt.

The metal shielding layer is formed by weaving tinned copper wires, and the weaving density is not less than 80%.

The further improvement is that the isolation layer is anti-vulcanization reinforced non-woven fabric.

The beneficial effects of the utility model reside in that:

1. the tin-plated copper wire folded yarn required by the conductor of the utility model contains 0.16mm thin steel wire as reinforcement, and adopts a mode of equidirectional twisting during twisting, namely the direction of the bundle wire is the same as the twisting direction of the conductor, so that the softness of the whole conductor is not influenced while the strength of the cable is improved after the thin steel wire is added;

2. the conductor of the utility model is twisted by a plurality of strands of high-flexibility high-quality anaerobic tinned copper wires, the structure of the conductor is more stable, the softness and the bending property of the whole cable are ensured, the minimum bending radius of a finished cable product can reach 5D (D is the outer diameter of the cable), and the cable laying requirement under a low-temperature environment is very matched;

3. the utility model discloses insulating weather resistance high pressure EPDM rubber insulating material who adopts independent research and development, the tensile strength of insulating rubber is more than or equal to 6.5MPa, the elongation at break is more than or equal to 200%, the volume resistivity minimum exceeds 1 x 1015 omega cm, ageing temperature is under the condition of 158 ℃ (7 days), its tensile strength and elongation at break after ageing can be qualified and be superior to standard specified value, guarantee that the cable also can keep good insulating properties under low temperature environment;

4. the utility model discloses insulating isolation layer and shielding layer adopt aluminium-plastic composite tape and tin-plating to weave the copper wire and combine together and constitute the shielding layer, effectively guarantee cable complex environment electromagnetism, electric field shielding, ensure cable shielding effect;

5. the utility model adopts a 3 (main wire core) +3 (steel wire rope filling strip) structure during cabling, the filling strip put in the gap is made by extruding high-strength rubber outside the steel wire rope, so that the cable structure is more stable, and the tensile strength is higher;

6. the utility model discloses the cable adopts resistant oil, low temperature resistant cross-linked polyolefin rubber sheath material, the tensile strength of sheath rubber is big, elongation at break is high, low temperature resistant performance is excellent (-55 ℃ the low temperature tensile still has great margin), compare with conventional power cable, this cable low temperature resistant performance is superior, the pulling force that the finished product can stand has thin steel wire and has the more conventional low temperature resistant cable of wire rope filler strip to improve more than 15% because of the conductor at the stranding gap packing, its life under the low temperature environment of laying improves greatly.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of a conductor structure.

Detailed Description

As shown in fig. 1, a thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible power distribution cable comprises a cable core, wherein the cable core is formed by twisting a plurality of power wire cores and steel wire rope filler strips with the same number as the power wire cores; an oil-resistant low-temperature-resistant cross-linked polyolefin rubber outer sheath 8 is directly extruded outside the cable core; the power wire core is composed of a conductor 1, a cross-linking weather-resistant high-pressure ethylene propylene diene monomer rubber insulating layer 2 extruded outside the conductor, an insulating isolation layer 3 wrapped outside the cross-linking weather-resistant high-pressure ethylene propylene diene monomer rubber insulating layer, a metal shielding layer 4 woven outside the insulating isolation layer and an isolation layer 5 wrapped outside the metal shielding layer; the steel wire rope filling strip is composed of a steel wire rope 6 and a rubber layer 7 extruded outside the steel wire rope; the insulation isolation layer is an aluminum-plastic composite tape, so that the wire core can be protected and prevented from being damaged; the metal shielding layer is formed by weaving tinned copper wires, the weaving density is not less than 80%, and the aluminum-plastic composite belt and the tinned copper wires are combined to form the shielding layer, so that the electromagnetic and electric field shielding of the cable in a complex environment is effectively ensured, and the shielding effect of the cable is ensured; the isolation layer is anti vulcanization strenghthened type non-woven fabrics, has improved the anti vulcanization nature and the reinforcing nature of sinle silk.

As shown in fig. 2, the conductor 1 is formed by twisting a plurality of strands, the strands are formed by twisting a plurality of high-flexibility oxygen-free tinned copper wires 9 with the copper purity of 99.96% and a plurality of thin steel wires 10 with the diameter of 0.16mm in the same direction, the flexibility of the whole conductor is not affected while the strength of the cable is improved after the thin steel wires are added, the structure of the conductor is more stable, the overall flexibility and the bending property of the cable are ensured, the bending radius of a finished cable can reach 5D (D is the outer diameter of the cable) at the minimum, and the cable laying requirement under the low-temperature environment is very met.

Example 1:

the thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible cable for power distribution comprises the following production method and steps:

step one, stranding a conductor: high-flexibility high-quality oxygen-free tinned copper wires with the copper purity of 99.96 percent are used, the high-flexibility high-quality oxygen-free tinned copper wires and thin steel wires with the thickness of 0.16mm are used as single wire bundles to be made into folded wires, a homodromous twisting mode is adopted during twisting, namely the direction of the folded wires is the same as the twisting direction of the conductor, and the multiple wires are twisted into the required conductor;

step two, insulating extrusion: extruding a layer of cross-linked weather-resistant high-pressure ethylene propylene diene monomer insulation layer of the stranded conductor through catenary continuous vulcanization extrusion equipment, and obtaining a required insulation wire core through segmentation;

thirdly, extruding the filling strips: extruding a layer of high-strength filling rubber from a steel wire rope by using catenary continuous vulcanization extrusion equipment to obtain a required steel wire rope filling strip;

fourthly, insulating and isolating: a layer of high-quality aluminum-plastic composite tape is wrapped outside the insulated wire core to serve as an insulated isolation layer, so that the wire core can be protected, and the wire core is prevented from being damaged;

fifthly, weaving a layer of metal shielding layer formed by tinned copper wires on the insulated wire cores wrapped with the aluminum-plastic composite tape by a high-speed weaving machine, and wrapping a layer of anti-vulcanization reinforced non-woven fabric outside for protection;

sixthly, cabling: the power wire core is crossed and cabled with the steel wire rope filling strip through a cabling machine to manufacture a semi-finished cable;

and seventhly, extruding a layer of oil-resistant low-temperature-resistant cross-linked polyolefin rubber outer sheath on the processed semi-finished cable by using catenary continuous vulcanization extrusion equipment.

In order to really adapt to a cable used in a low-temperature environment for a long time, the company develops the thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible cable for power distribution, which has the characteristics of oil resistance, low temperature resistance, high flexibility, bending property and the like, is flexible in structure, stable in performance, outstanding in tensile strength of a finished cable, stable in electrical performance in a complex environment, good in electric field shielding performance, excellent in low-temperature resistance, long in service life and the like, and can completely meet the use requirements of the cable in the low-temperature environment.

The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.

Claims

1. The utility model provides a multicore flexible cable is used in distribution of thermosetting resistant low temperature resistant high strength that resistant oil which characterized in that: the cable comprises a cable core, wherein the cable core is formed by twisting a plurality of power wire cores and steel wire rope filling strips with the same number as the power wire cores; directly extruding an oil-resistant low-temperature-resistant cross-linked polyolefin rubber outer sheath outside the cable core; the power wire core is composed of a conductor, a cross-linking weather-resistant high-voltage ethylene propylene diene monomer rubber insulating layer extruded outside the conductor, an insulating isolation layer wrapped outside the cross-linking weather-resistant high-voltage ethylene propylene diene monomer rubber insulating layer, a metal shielding layer woven outside the insulating isolation layer and an isolation layer wrapped outside the metal shielding layer.

2. The thermosetting oil-resistant low temperature-resistant high strength electrical distribution multi-core flexible cable as claimed in claim 1, wherein the conductor is formed by stranding a plurality of strands.

3. The thermosetting oil-resistant low-temperature-resistant high-strength multicore flexible cable for power distribution according to claim 2, wherein the strands are formed by co-twisting a plurality of high-flexibility oxygen-free tinned copper wires having a copper purity of 99.96% and a plurality of fine steel wires having a diameter of 0.16 mm.

4. The thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible power distribution cable as claimed in claim 1, wherein the steel wire rope filling strip is composed of steel wire ropes and rubber layers extruded outside the steel wire ropes.

5. The thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible power distribution cable as claimed in claim 1, wherein the insulating isolation layer is an aluminum-plastic composite tape.

6. The thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible power distribution cable according to claim 1, wherein the metal shielding layer is braided by tinned copper wires, and the braiding density is not less than 80%.

7. The thermosetting oil-resistant low-temperature-resistant high-strength multi-core flexible power distribution cable as claimed in claim 1, wherein the isolation layer is a vulcanization-resistant reinforced nonwoven fabric.