High-conductivity overhead insulated cable
Through a multi-layer structural design, including mineral filling layer, semiconductive insulating shielding layer and high flame retardant protective sleeve layer, the fireproof and thermal insulation effect of high-conductive overhead insulated cables is improved, and avoided by galvanized steel wire armor and rubber protective sleeves The damage of the cable during transportation solves the problems of poor fire-proof and heat insulation effect and easy transportation in the prior art.
Patent Information
- Application Number
- CN202420517198.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-18
AI Technical Summary
Existing high-conductive overhead insulated cables have poor fire resistance and heat insulation during use, resulting in serious losses in forest fires and are susceptible to damage during transportation.
Adopt a multi-layer structural design, including No. 1 inner steel core, No. 1 outer steel core, No. 2 inner steel core and No. 2 outer steel core layer. No. 2 outer steel core layer is equipped with twisted conductors, all of which are mineral filling layers and minerals The fill layer is fixedly connected to the semiconductor shielding layer, the semiconductor shielding layer is equipped with a cross-linked polyethylene insulation layer, the cross-linked polyethylene insulation layer is installed with a semiconductor insulation layer, and the semiconductor insulation layer is installed with a mineral insulation layer. , install fill ropes outside the mineral insulation layer, install aluminum sheath isolation layer outside the filling rope, install fireproof isolation layer outside the aluminum sheath isolation layer, install high flame retardant protective sleeve layer outside the fire retardant protective sleeve, and install high flame retardant protective sleeve The layer is equipped with a waterproof layer and galvanized steel wire armor, and finally wrapped in a rubber protective cover.
It significantly improves the fire insulation effect, reduces losses in forest fires, and avoids internal damage to the cables during transportation and installation through metal protective layers.
Smart Images
Figure CN222167999U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of insulated cables, in particular to a high-conductivity overhead insulated cable. Background Art
[0002] Overhead cable (full name overhead insulated cable) is an overhead conductor equipped with an insulating layer and a protective sheath. It is a special cable manufactured using a production process similar to that of cross-linked cables. It is a new way of transmitting electricity between overhead conductors and underground cables. Overhead cables are all single-core. According to their different structures, they can be divided into hard aluminum wire structure, hard-drawn copper wire structure, aluminum alloy wire structure, steel core or aluminum alloy core support structure and self-supporting three-core composite structure (the wire core can be hard aluminum or hard copper wire), etc.
[0003] After extensive searching, it was found that the Chinese patent publication number is: CN 218631460 U discloses a high-conductivity overhead insulated cable, including a shielding layer, a filling layer, an outer insulating layer, a rubber sheath, a plurality of inner insulating layers, a first waterproof layer, a conductor layer, a first outer steel core layer and a first inner steel core, etc. The specific design of the cable is: four insulating layers, a first waterproof layer, a conductor layer, a first outer steel core layer and a first inner steel core are used in conjunction with each other, the cable has good conductivity and low failure rate, and the first outer steel core layer and the first inner steel core are added to improve their tensile strength and extend the service life of the overall structure; the second outer steel core layer and the second inner steel core further enhance the tensile strength of the overall high-conductivity overhead insulated cable structure design on the basis of the original first outer steel core layer and the first inner steel core; the first waterproof layer and the second waterproof layer are designed to have good waterproof performance, and realize the normal safe power transmission and stable tensile resistance of the conductor layer, the second outer steel core layer and the second inner steel core. However, the cable is spread all over the beautiful mountains and rivers of the motherland, and the fireproof and heat-insulating effect is not good during use. When encountering a forest fire, it still causes serious losses, and the high-conductivity overhead insulated cable is easily damaged internally during transportation. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a high-conductivity overhead insulated cable to solve the problem mentioned in the above background technology that the cable is spread throughout the vast land of the motherland, but has poor fireproof and heat-insulating effects during use, and still causes serious losses when encountering forest fires. In addition, the high-conductivity overhead insulated cable is easily damaged internally during transportation.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-conductivity overhead insulated cable, comprising a No. 1 inner steel core, a No. 1 outer steel core layer, a No. 2 inner steel core and a No. 2 outer steel core layer, the outer surface of the No. 2 outer steel core layer is provided with a stranded conductor, the outer surfaces of the No. 1 outer steel core layer and the stranded conductor are both provided with a mineral filling layer, the outer surface of the mineral filling layer is fixedly connected with a semi-conductive conductor shielding layer, the outer surface of the semi-conductive conductor shielding layer is fixedly installed with a cross-linked polyethylene insulation layer, the outer surface of the cross-linked polyethylene insulation layer is fixedly installed with a semi-conductive insulation shielding layer, the outer surface of the semi-conductive insulation shielding layer is fixedly installed with a mineral insulation layer, the outer surface of the mineral insulation layer is fixedly installed with a filling rope, the outer surface of the filling rope is fixedly installed with an aluminum sheath isolation layer, the outer surface of the aluminum sheath isolation layer is fixedly installed with a fireproof isolation layer, and the outer surface of the fireproof isolation layer is fixedly installed with a high flame-retardant protective sheath layer.
[0006] Preferably, a waterproof layer is fixedly installed on the outer surface of the highly flame-retardant protective sleeve layer, a galvanized steel wire armor is fixedly installed on the outer surface of the waterproof layer, and a rubber protective sleeve is fixedly installed on the outer surface of the galvanized steel wire armor.
[0007] Preferably, the semiconductive conductor shielding layer is composed of a semiconductive material, the cross-linked polyethylene insulating layer is made by chemical reaction between polyethylene and a cross-linking agent, and the semiconductive insulating shielding layer is made of metallized paper.
[0008] Preferably, the fireproof isolation layer is made of graphene, and the highly flame-retardant protective sleeve layer is made of flame-retardant polyolefin.
[0009] Preferably, the waterproof layer is made of plastic, and the rubber protective sleeve is made of nylon or polyethylene.
[0010] Preferably, the mineral filling layer is made of aluminum silicate fiber cotton, and the filling rope is made of polyester.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] 1. The highly conductive overhead insulated cable has a semi-conductive insulating shielding layer fixedly installed on the outer surface of a cross-linked polyethylene insulating layer, a mineral insulating layer fixedly installed on the outer surface of the semi-conductive insulating shielding layer, a filling rope fixedly installed on the outer surface of the mineral insulating layer, an aluminum sheath insulating layer fixedly installed on the outer surface of the filling rope, a fireproof insulating layer fixedly installed on the outer surface of the aluminum sheath insulating layer, and a highly flame-retardant protective sheath layer fixedly installed on the outer surface of the fireproof insulating layer, thereby achieving the effect of improving the fireproof and heat-insulating effect during use and reducing the serious losses caused when encountering a forest fire.
[0013] 2. The high-conductivity overhead insulated cable has a waterproof layer fixedly installed on the outer surface of the high-flame-retardant protective sheath to protect the high-flame-retardant protective sheath. At the same time, a galvanized steel wire armor is fixedly installed on the outer surface of the waterproof layer. A layer of metal protection is added to the outermost surface of the product to prevent the internal useful layer from being damaged during transportation and installation. A rubber protective sheath is fixedly installed on the outer surface of the galvanized steel wire armor to completely wrap the cable, thereby achieving the effect of preventing the high-conductivity overhead insulated cable from being easily damaged during transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;
[0015] Figure 2 It is a top view schematic diagram of the structure of the utility model;
[0016] In the figure: 1. No. 1 inner steel core; 2. No. 1 outer steel core layer; 3. Mineral filling layer; 4. Semi-conductive conductor shielding layer; 5. Cross-linked polyethylene insulation layer; 6. Semi-conductive insulation shielding layer; 7. Mineral insulation layer; 8. No. 2 inner steel core; 9. No. 2 outer steel core layer; 10. Twisted conductor; 11. Filling rope; 12. Aluminum sheath isolation layer; 13. Fireproof isolation layer; 14. High flame retardant protective sheath layer; 15. Waterproof layer; 16. Galvanized steel wire armor; 17. Rubber protective sheath. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] Embodiment 1:
[0019] Please refer to Figure 1-2 ,
[0020] A high-conductivity overhead insulated cable comprises a No. 1 inner steel core 1, a No. 1 outer steel core layer 2, a No. 2 inner steel core 8 and a No. 2 outer steel core layer 9, the outer surface of the No. 2 outer steel core layer 9 is provided with a stranded conductor 10, the outer surfaces of the No. 1 outer steel core layer 2 and the stranded conductor 10 are both provided with a mineral filling layer 3, the outer surface of the mineral filling layer 3 is fixedly connected with a semi-conductive conductor shielding layer 4, the outer surface of the semi-conductive conductor shielding layer 4 is fixedly installed with a cross-linked polyethylene insulation layer 5, the outer surface of the cross-linked polyethylene insulation layer 5 is fixedly installed with a semi-conductive insulation shielding layer 6, the outer surface of the semi-conductive insulation shielding layer 6 is fixedly installed with a mineral insulation layer 7, the outer surface of the mineral insulation layer 7 is fixedly installed with a filling rope 11, the outer surface of the filling rope 11 is fixedly installed with an aluminum sheath isolation layer 12, the outer surface of the aluminum sheath isolation layer 12 is fixedly installed with a fireproof isolation layer 13, and the outer surface of the fireproof isolation layer 13 is fixedly installed with a high flame retardant protective sheath layer 14.
[0021] Specifically, a semiconductive conductor shielding layer 4 is fixedly connected to the outer surface of the mineral filling layer 3, a cross-linked polyethylene insulation layer 5 is fixedly installed on the outer surface of the semiconductive conductor shielding layer 4, and a semiconductive insulating shielding layer 6 is fixedly installed on the outer surface of the cross-linked polyethylene insulation layer 5, a mineral insulation layer 7 is fixedly installed on the outer surface of the semiconductive insulating shielding layer 6, and a filling rope 11 is fixedly installed on the outer surface of the mineral insulation layer 7, an aluminum sheath isolation layer 12 is fixedly installed on the outer surface of the filling rope 11, a fireproof isolation layer 13 is fixedly installed on the outer surface of the aluminum sheath isolation layer 12, and a highly flame-retardant protective sheath layer 14 is fixedly installed on the outer surface of the fireproof isolation layer 13, thereby achieving the effect of improving the fireproof and heat-insulating effect during use and reducing serious losses when encountering a forest fire.
[0022] In the embodiment: the semiconductive conductor shielding layer 4 is made of a semiconductive material, the cross-linked polyethylene insulating layer 5 is made of polyethylene and a cross-linking agent through a chemical reaction, and the semiconductive insulating shielding layer 6 is made of metallized paper.
[0023] In the embodiment: the semi-conductive conductor shielding layer 4 is composed of a semi-conductive material with very low resistivity and very thin thickness. The internal semi-conductive shielding layer is to make the electric field on the outer surface of the wire core uniform and avoid local discharge of the conductor and insulation due to the rough surface of the conductor and the twisted wire core. The cross-linked polyethylene insulation layer 5 is made of polyethylene and a cross-linking agent through a chemical reaction. It has high temperature resistance, corrosion resistance and aging resistance, and is suitable for high-voltage power cables and communication cables with special requirements. The semi-conductive insulating shielding layer 6 is made of metallized paper, which plays an insulating role to ensure that the cable is not damaged. The other is to allow the insulating layer to have better contact with the conductor.
[0024] In the embodiment: the fireproof isolation layer 13 is made of graphene, and the highly flame-retardant protective sleeve layer 14 is made of flame-retardant polyolefin.
[0025] Specifically, since the fireproof isolation layer 13 is made of graphene, graphite material is a common cable fireproof material, which is non-flammable, smoke-free, and does not produce toxic gases. It also has excellent thermal conductivity and electrical conductivity. Graphite material can be used as a cable shielding layer, conductor coating layer and filling material, which can effectively prevent cable fires and improve the electrical performance of the cable. The high flame retardant protective sheath 14 is made of flame retardant polyolefin. Flame retardant polyolefin has good flame retardant properties and low smoke and non-toxic characteristics. It is one of the most widely used flame retardant cable materials. Cables made of flame retardant polyolefin can extinguish flames by themselves under the action of fire or fire source, and the amount of smoke is small, which is harmless to the human body.
[0026] In the embodiment: the mineral filling layer 3 is made of aluminum silicate fiber cotton, and the filling rope 11 is made of polyester.
[0027] Specifically, the mineral filling layer 3 is made of aluminum silicate fiber cotton and has good thermal insulation and fire resistance. The filling rope 11 is made of polyester, which has the characteristics of lightness, softness, high tensile strength, and can also play the role of waterproof, anti-corrosion and heat resistance.
[0028] Working principle: a semi-conductive insulating shielding layer 6 is fixedly installed on the outer surface of the cross-linked polyethylene insulating layer 5, a mineral insulating layer 7 is fixedly installed on the outer surface of the semi-conductive insulating shielding layer 6, and a filling rope 11 is fixedly installed on the outer surface of the mineral insulating layer 7, an aluminum sheath insulating layer 12 is fixedly installed on the outer surface of the filling rope 11, a fireproof insulating layer 13 is fixedly installed on the outer surface of the aluminum sheath insulating layer 12, and a highly flame-retardant protective sheath layer 14 is fixedly installed on the outer surface of the fireproof insulating layer 13. Compared with the related art, the high-conductivity overhead insulated cable provided by the utility model has the following beneficial effects: thereby achieving the effect of improving the fireproof and heat-insulating effect during use, and reducing the serious losses caused when encountering a forest fire.
[0029] Embodiment 2:
[0030] Please refer to Figure 1-2 ,
[0031] A waterproof layer 15 is fixedly installed on the outer surface of the highly flame-retardant protective sheath 14 , a galvanized steel wire armor 16 is fixedly installed on the outer surface of the waterproof layer 15 , and a rubber protective sheath 17 is fixedly installed on the outer surface of the galvanized steel wire armor 16 .
[0032] Specifically, a waterproof layer 15 is fixedly installed on the outer surface of the highly flame retardant protective sheath 14 to protect the highly flame retardant protective sheath 14, and a galvanized steel wire armor 16 is fixedly installed on the outer surface of the waterproof layer 15. A layer of metal protection is added to the outermost surface of the product to prevent the internal functional layer from being damaged during transportation and installation. A rubber protective sheath 17 is fixedly installed on the outer surface of the galvanized steel wire armor 16 to completely wrap the cable, thereby achieving the effect of preventing the high-conductivity overhead insulated cable from being easily damaged during transportation.
[0033] In the embodiment: the waterproof layer 15 is made of rubber, and the rubber protective cover 17 is made of polyethylene.
[0034] Specifically, because the waterproof layer 15 is made of rubber, the plastic waterproof layer 15 has the advantages of light weight, simple processing technology, low cost, strong plasticity, corrosion resistance, wear resistance and the like. At the same time, the rubber protective cover 17 is made of polyethylene material, which has good wear resistance, anti-aging and strong corrosion resistance, and can more effectively protect the outer surface of the cable from aging and friction.
[0035] Working principle: a galvanized steel wire armor 16 is fixedly installed on the outer surface of the waterproof layer 15, and a layer of metal protection is added to the outermost side of the product to prevent the internal functional layer from being damaged during transportation and installation, and a rubber protective cover 17 is fixedly installed on the outer surface of the galvanized steel wire armor 16 to completely wrap the cable. Compared with the related art, the high-conductivity overhead insulated cable provided by the utility model has the following beneficial effects: thereby achieving the effect of preventing the high-conductivity overhead insulated cable from being easily damaged during transportation.
[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-conductivity overhead insulated cable comprising a No. 1 inner steel core (1), a No. 1 outer steel core layer (2), a No. 2 inner steel core (8) and a No. 2 outer steel core layer (9), characterized in that: The outer surface of the second outer steel core layer (9) is provided with a stranded conductor (10), and the outer surfaces of the first outer steel core layer (2) and the stranded conductor (10) are both provided with a mineral filling layer (3), the outer surface of the mineral filling layer (3) is fixedly connected with a semiconductive conductor shielding layer (4), the outer surface of the semiconductive conductor shielding layer (4) is fixedly installed with a cross-linked polyethylene insulation layer (5), the outer surface of the cross-linked polyethylene insulation layer (5) is fixedly installed with a semiconductive insulation shielding layer (6), the outer surface of the semiconductive insulation shielding layer (6) is fixedly installed with a mineral insulation layer (7), the outer surface of the mineral insulation layer (7) is fixedly installed with a filling rope (11), the outer surface of the filling rope (11) is fixedly installed with an aluminum sheath isolation layer (12), the outer surface of the aluminum sheath isolation layer (12) is fixedly installed with a fireproof isolation layer (13), and the outer surface of the fireproof isolation layer (13) is fixedly installed with a high flame retardant protective sheath layer (14).
2. The high-conductivity overhead insulated cable according to claim 1, characterized in that: A waterproof layer (15) is fixedly mounted on the outer surface of the highly flame-retardant protective sleeve layer (14), a galvanized steel wire armor (16) is fixedly mounted on the outer surface of the waterproof layer (15), and a rubber protective sleeve (17) is fixedly mounted on the outer surface of the galvanized steel wire armor (16).
3. The high-conductivity overhead insulated cable according to claim 1, characterized in that: The semiconductive conductor shielding layer (4) is made of a semiconductive material, the cross-linked polyethylene insulating layer (5) is made by chemical reaction between polyethylene and a cross-linking agent, and the semiconductive insulating shielding layer (6) is made of metallized paper.
4. The high-conductivity overhead insulated cable according to claim 1, characterized in that: The fireproof isolation layer (13) is made of graphene, and the highly flame-retardant protective sleeve layer (14) is made of flame-retardant polyolefin.
5. The high-conductivity overhead insulated cable according to claim 2, characterized in that: The waterproof layer (15) is made of plastic, and the rubber protective sleeve (17) is made of nylon or polyethylene.
6. The high-conductivity overhead insulated cable according to claim 1, characterized in that: The mineral filling layer (3) is made of aluminum silicate fiber cotton, and the filling rope (11) is made of polyester.