CN210271860U - Environment-friendly silane cross-linked insulating flame-retardant power cable - Google Patents
Environment-friendly silane cross-linked insulating flame-retardant power cable Download PDFInfo
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- CN210271860U CN210271860U CN201921486457.2U CN201921486457U CN210271860U CN 210271860 U CN210271860 U CN 210271860U CN 201921486457 U CN201921486457 U CN 201921486457U CN 210271860 U CN210271860 U CN 210271860U
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Abstract
The utility model discloses an environment-friendly silane crosslinked insulation flame-retardant power cable, which comprises a cable core, wherein the cable core is formed by stranding a plurality of silane crosslinked insulation wire cores; the cable comprises a cable core, a gap of the cable core is filled with a polyurethane rubber block and then wrapped with a halogen-free flame-retardant silane crosslinking POE composite tape, a second ethylene-vinyl acetate thermal contraction layer wraps the halogen-free flame-retardant silane crosslinking POE composite tape, a PVC aluminum foil composite hose for sealing is arranged outside the second ethylene-vinyl acetate thermal contraction layer in a sleeved mode, a thermoplastic low-smoke halogen-free flame-retardant oxygen-isolation inner sheath wraps the outer surface of the PVC aluminum foil composite hose in an extruded mode after a fireproof coating layer is coated on the outer surface of the PVC aluminum foil composite hose, an aluminum tape armor layer is woven outside the thermoplastic low-smoke halogen-free flame-retardant oxygen-isolation inner. The utility model discloses have elasticity, pull resistance, fire resistance, thermal-insulated, oxygen proof, performance such as environmental protection.
Description
Technical Field
The utility model relates to a power cable field specifically indicates an insulating fire-retardant power cable of environment-friendly silane crosslinking.
Background
With the development of the world economy and science, the demand of the electric wire and the electric cable is increased, and the performance requirements of the electric wire and the electric cable are improved. Under new economic conditions and technical conditions, the development of the global wire and cable industry presents a new trend, and the environment-friendly cable gradually becomes the development key point of the global cable. In view of the serious pollution of the conventional cable, a great amount of dioxin, lead, cadmium, halide and other pollution substances appear in the processes of manufacturing, using and waste disposal, and the conventional cable is used less and less in developed countries. Particularly, after the european union sets the ROHS directive, countries in europe, america, and japan have higher and higher environmental protection requirements for cables used, and they have strictly prohibited or imported non-environmental protection cables, and research and development and large-scale adoption of ecological environmental protection cables have become the international mainstream. At present, a crosslinked cable becomes one of the fastest-developed cables in the last decade due to the advantages of high working temperature, excellent insulating property, high overload resistance and the like, and the crosslinking mode of the crosslinked cable is generally divided into three modes of peroxide crosslinking, irradiation crosslinking and silane crosslinking, wherein the silane crosslinked cable has the advantages of low equipment investment, strong adaptability and simple process, and becomes the main variety of the crosslinked cable. However, the silane crosslinked insulating layer of the silane crosslinked cable has the characteristics of poor adhesion and large thermal shrinkage, so that the thermal shrinkage index of the silane crosslinked cable often exceeds the requirement of the national standard of the related crosslinked cable, the quality of the product is seriously influenced, and the complaint of customers is caused; however, in the actual production process, since the insulation adopts silane crosslinked polyethylene which is a flammable material, although the flame-retardant material is adopted outside, when a fire disaster occurs in the use process, after the external flame-retardant material burns, the cable insulation can be molten, dropped and burnt, and the safety and reliability of the line can not be ensured; and most of the existing cables are made of materials which generate toxic gases and substances after combustion, so that the cables are not environment-friendly and harm the personal safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an environment-friendly silane crosslinking insulation flame-retardant power cable with strong pulling force, no breakage, vulcanization resistance, oil resistance and wear resistance is provided.
The utility model discloses an environment-friendly silane crosslinked insulation flame-retardant power cable, which comprises a cable core, wherein the cable core is formed by stranding a plurality of silane crosslinked insulation wire cores; the cable comprises a cable core, a gap of the cable core is filled with a polyurethane rubber block and then wrapped with a halogen-free flame-retardant silane crosslinking POE composite tape, a second ethylene-vinyl acetate thermal contraction layer wraps the halogen-free flame-retardant silane crosslinking POE composite tape, a PVC aluminum foil composite hose for sealing is arranged outside the second ethylene-vinyl acetate thermal contraction layer in a sleeved mode, a thermoplastic low-smoke halogen-free flame-retardant oxygen-isolation inner sheath wraps the outer surface of the PVC aluminum foil composite hose in an extruded mode after a fireproof coating layer is coated on the outer surface of the PVC aluminum foil composite hose, an aluminum tape armor layer is woven outside the thermoplastic low-smoke halogen-free flame-retardant oxygen-isolation inner.
The silane crosslinked insulated wire core is further improved and comprises a tinned copper conductor, a semiconductive shielding belt wrapped outside the tinned copper conductor, a first ethylene-vinyl acetate thermal contraction layer wrapped outside the semiconductive shielding belt, a silane crosslinked polyethylene insulating layer extruded outside the first ethylene-vinyl acetate thermal contraction layer and a silicone tube sleeved outside the silane crosslinked polyethylene insulating layer.
The silicone tube is further improved, the silicone tube comprises a butyronitrile synthetic rubber inner layer, and the butyronitrile synthetic rubber inner layer is sequentially braided with two steel wire reinforcing layers and then is extruded with an oil-resistant synthetic rubber outer layer.
The halogen-free flame-retardant silane cross-linked POE composite material belt is further improved, the thickness of the halogen-free flame-retardant silane cross-linked POE composite material belt is 2-4mm, and the overlapping rate is not lower than 50%.
In a further improvement, the thickness of the second ethylene-vinyl acetate thermal contraction layer is 0.3 mm.
In a further improvement, the thickness of the first ethylene-vinyl acetate thermal contraction layer is 0.2 mm.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the filling layer is improved into a polyurethane rubber block, the rubber has high tensile strength (generally 28-42MPa, the highest 70MPa and tear strength, excellent elasticity, high elasticity even when the hardness is high, large elongation at break, generally 400-600%, the highest 1000%, wide hardness range, the lowest Shore (A)10, most Shore (A) 45-95, when the hardness is higher than Shore (A)70, the tensile strength and the stress at definite elongation are higher than those of natural rubber, when the hardness reaches Shore (A) 80-90, the tensile strength, the tear strength and the stress at definite elongation are also very high, the polyurethane rubber has good oil resistance, at normal temperature, the resistance to most of oil and solvents is better than that of nitrile rubber, the rubber has excellent wear resistance, and the wear resistance is 9 times higher than that of the natural rubber, 3 times higher than styrene butadiene rubber; the rubber has good air tightness which is close to that of butyl rubber when the hardness is higher; the cable has good capabilities of resisting oxygen, ozone and ultraviolet radiation, and also has good cold resistance, so that the cable has the above performances;
2. the cable core is fastened by the halogen-free flame-retardant silane cross-linked POE composite material belt and is prepared by adopting the halogen-free flame-retardant silane cross-linked POE composite material, so that the tensile strength and the flame retardant property of the cable are improved by one step;
3. the PVC aluminum foil composite hose is adopted to improve the sealing property of the cable, so that the cable has the advantages of high temperature resistance, oleic acid resistance, flame retardance, insulation, free connection and light volume;
4. the cable has the advantages that the cable core and the cable core of the cable are respectively wrapped with the ethylene-vinyl acetate thermal shrinkage layer, and the cable has the characteristics of excellent adhesiveness and high final adhesion and strength, wherein the wire core is arranged between the semi-conductive shielding belt and the silane crosslinking insulating layer, so that the characteristic of poor adhesive force of the silane crosslinking insulating layer is effectively improved, and the thermal shrinkage is reduced;
5. the coating layer is mainly formed by adding various fireproof flame retardants, plasticizers and the like into the tertiary acrylic emulsion water-based material, and when the coating layer is on fire, a uniform and compact spongy foam heat insulation layer can be generated, so that the spreading and spreading of flame can be effectively inhibited and blocked, and the wire and the cable can be protected;
6. the thermoplastic low-smoke halogen-free flame-retardant oxygen-insulating inner sheath has excellent flame retardance, high oxygen index and excellent heat insulation and oxygen insulation; during combustion, no halogen acid gas is discharged, the release amount of toxic and corrosive gas is very little, the smoke concentration of the product is very low, and the flame retardant effect is very good, so that the cable has the performances of flame retardance, heat insulation, oxygen isolation, environmental protection and the like;
7. the thread gluing fireproof outer sheath is a buckle type high temperature resistant sleeve (a high-rise brand high temperature resistant sleeve for rubber pipe heat insulation), when the heat protection sleeve is installed, equipment does not need to be stopped, and a hose and a cable do not need to be disassembled; the hasp type adopts high-temperature glass fiber, a fireproof and flame-retardant adhesive tape is sewed inside the hasp type, and when the sleeve is adjusted to a proper size, the adhesive tape can be tightly combined; the flame-retardant silicone rubber is continuously exposed to the high temperature of 260 ℃ without being damaged, can bear 15 to 20 minutes at the high temperature of 1090 ℃ and can bear 15 to 30 seconds at the high temperature of 1650 ℃, the unique flame-retardant characteristic of the flame-retardant silicone rubber can effectively avoid the personnel from being burnt and scalded by high-heat pipelines, can greatly save the cost of heat energy loss, has strong chemical stability, does not react with substances such as oil, water, acid and alkali and the like in organic silicon, can be used for a long time within 260 ℃, and is not aged, and the surface of the silicone rubber is coated with the organic silicon, so the silicone rubber is not easily decomposed by ultraviolet light and ozone; the cable has the characteristics of extremely strong tension, no wrinkle and breakage, vulcanization resistance, no smoke, no halogen, no toxicity, pure oxygen, no combustion and good insulation, and after the cable is cured by the organic silica gel, the cable has stronger safety and environmental protection performance, effectively protects the human health of workers and reduces the incidence rate of occupational diseases.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a silicone tube.
Detailed Description
As shown in fig. 1, the environment-friendly silane crosslinked flame-retardant power cable of the present invention comprises a cable core, wherein the cable core is formed by twisting a plurality of silane crosslinked insulated wire cores; the silane crosslinked insulated wire core is composed of a tinned copper conductor 1, a semi-conductive shielding belt 2 wrapped outside the tinned copper conductor, a first ethylene-vinyl acetate thermal contraction layer 3 wrapped outside the semi-conductive shielding belt, a silane crosslinked polyethylene insulating layer 4 extruded outside the first ethylene-vinyl acetate thermal contraction layer, and a silicone tube 5 sleeved outside the silane crosslinked polyethylene insulating layer;
the cable comprises a cable core, a polyurethane rubber block 6 is filled in a gap of the cable core, a halogen-free flame-retardant silane crosslinking POE composite material belt 7 is wrapped around the cable core, a second ethylene-vinyl acetate thermal contraction layer 8 is wrapped outside the halogen-free flame-retardant silane crosslinking POE composite material belt, a PVC aluminum foil composite hose 9 for sealing is sleeved outside the second ethylene-vinyl acetate thermal contraction layer, a thermoplastic low-smoke halogen-free flame-retardant oxygen-isolating inner sheath 11 is extruded after a fireproof coating layer 10 is coated on the outer surface of the PVC aluminum foil composite hose, and the cable has excellent flame retardance, high oxygen index and excellent heat insulation and oxygen isolation; during combustion, no halogen acid gas is discharged, the release amount of toxic and corrosive gas is very little, the smoke concentration of the product is very low, and the flame retardant effect is very good, so that the cable has the performances of flame retardance, heat insulation, oxygen isolation, environmental protection and the like;
an aluminum tape armor layer 12 is woven outside a thermoplastic low-smoke halogen-free flame-retardant oxygen-insulating inner sheath, a thread-gluing fireproof outer sheath 13 is arranged outside the aluminum tape armor layer, the aluminum tape armor layer is a buckle type high-temperature-resistant sleeve, when the heat-protecting sleeve is installed, equipment does not need to be stopped, a hose and a cable do not need to be disassembled, and the aluminum tape armor layer has the other advantage that the aluminum tape armor layer can be installed in a factory on site to ensure correct tightness and structural integrity; the hasp type adopts high-temperature glass fiber, a fireproof and flame-retardant adhesive tape is sewed inside the hasp type, and when the sleeve is adjusted to a proper size, the adhesive tape can be tightly combined; the flame-retardant silicone rubber is continuously exposed to the high temperature of 260 ℃ without being damaged, can bear 15 to 20 minutes at the high temperature of 1090 ℃ and can bear 15 to 30 seconds at the high temperature of 1650 ℃, the unique flame-retardant characteristic of the flame-retardant silicone rubber can effectively avoid the personnel from being burnt and scalded by high-heat pipelines, can greatly save the cost of heat energy loss, has strong chemical stability, does not react with substances such as oil, water, acid and alkali and the like in organic silicon, can be used for a long time within 260 ℃, and is not aged, and the surface of the silicone rubber is coated with the organic silicon, so the silicone rubber is not easily decomposed by ultraviolet light and ozone; the cable has the characteristics of extremely strong tension, no wrinkle and breakage, vulcanization resistance, no smoke, no halogen, no toxicity, pure oxygen, no combustion and good insulation, and after the cable is cured by the organic silica gel, the cable has stronger safety and environmental protection performance, effectively protects the human health of workers and reduces the incidence rate of occupational diseases.
As shown in figure 2, the silicone tube comprises a butyronitrile synthetic rubber inner layer 51, the butyronitrile synthetic rubber inner layer is wrapped with an oil-resistant synthetic rubber outer layer 53 after being sequentially woven with two steel wire reinforcing layers 52, the outer layer is black or yellow oil-resistant Carbryn synthetic rubber, the ultra-strong wear-resistant silicone tube is an outer layer, the maximum protection is provided for a cable core, the adverse effect caused by petroleum and animal grease can be resisted, and the oil resistance and the wear resistance of the cable can be further enhanced.
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 (6)
1. The utility model provides an insulating fire-retardant power cable of environment-friendly silane cross-linking, includes the cable core, its characterized in that: the cable core is formed by stranding a plurality of silane crosslinked insulated wire cores; the cable comprises a cable core, a gap of the cable core is filled with a polyurethane rubber block and then wrapped with a halogen-free flame-retardant silane crosslinking POE composite tape, a second ethylene-vinyl acetate thermal contraction layer wraps the halogen-free flame-retardant silane crosslinking POE composite tape, a PVC aluminum foil composite hose for sealing is arranged outside the second ethylene-vinyl acetate thermal contraction layer in a sleeved mode, a thermoplastic low-smoke halogen-free flame-retardant oxygen-isolation inner sheath wraps the outer surface of the PVC aluminum foil composite hose in an extruded mode after a fireproof coating layer is coated on the outer surface of the PVC aluminum foil composite hose, an aluminum tape armor layer is woven outside the thermoplastic low-smoke halogen-free flame-retardant oxygen-isolation inner.
2. The environment-friendly silane cross-linked insulated flame-retardant power cable according to claim 1, wherein the silane cross-linked insulated wire core is composed of a tinned copper conductor, a semiconductive shielding tape wrapped outside the tinned copper conductor, a first ethylene-vinyl acetate thermal contraction layer wrapped outside the semiconductive shielding tape, a silane cross-linked polyethylene insulation layer extruded outside the first ethylene-vinyl acetate thermal contraction layer, and a silicone tube sleeved outside the silane cross-linked polyethylene insulation layer.
3. The environment-friendly silane cross-linked insulated flame-retardant power cable according to claim 2, wherein the silicone tube comprises an inner layer of nitrile-butadiene synthetic rubber, and the inner layer of nitrile-butadiene synthetic rubber is sequentially braided with two steel wire reinforcement layers and then is extruded with an outer layer of oil-resistant synthetic rubber.
4. The environment-friendly silane cross-linked insulated flame-retardant power cable according to claim 1, wherein the thickness of the halogen-free flame-retardant silane cross-linked POE composite tape is 2-4mm, and the overlapping rate is not less than 50%.
5. The environment-friendly silane crosslinked insulating flame-retardant power cable according to claim 1, wherein the thickness of the second ethylene-vinyl acetate heat-shrinkable layer is 0.3 mm.
6. The environment-friendly silane crosslinked insulation flame-retardant power cable according to claim 2, wherein the thickness of the first ethylene-vinyl acetate heat-shrinkable layer is 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921486457.2U CN210271860U (en) | 2019-09-09 | 2019-09-09 | Environment-friendly silane cross-linked insulating flame-retardant power cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921486457.2U CN210271860U (en) | 2019-09-09 | 2019-09-09 | Environment-friendly silane cross-linked insulating flame-retardant power cable |
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| CN210271860U true CN210271860U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951518A (en) * | 2021-02-19 | 2021-06-11 | 湖北南远电缆科技有限公司 | Environment-friendly water-blocking fire-resistant cable and production process thereof |
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2019
- 2019-09-09 CN CN201921486457.2U patent/CN210271860U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951518A (en) * | 2021-02-19 | 2021-06-11 | 湖北南远电缆科技有限公司 | Environment-friendly water-blocking fire-resistant cable and production process thereof |
| CN112951518B (en) * | 2021-02-19 | 2022-06-14 | 湖北南远电缆科技有限公司 | Environment-friendly water-blocking fire-resistant cable and production process thereof |
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