High-voltage cable with aluminum sheath structure

Abstract

The utility model discloses a high-voltage cable with an aluminum sheath structure. The high-voltage cable comprises a composite cable core, a protective layer, a water-blocking sheath layer, an aluminum sheath layer and a protective layer which are sequentially arranged from inside to outside, the protective layer is made of ceramic silicone rubber and wraps the composite cable core. The waterproof sheath layer wraps the protection layer. The aluminum sheath layer is an aluminum alloy net and wraps the water-blocking sheath layer; the protection layer is made of chloroprene rubber and wraps the aluminum sleeve layer. The protective layer is formed by wrapping ceramic silicone rubber on the composite cable core, the ceramic silicone rubber tape is made of ceramic silicone rubber, and the ceramic silicone rubber is a novel high-molecular refractory material and has the characteristics of excellent fire prevention, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, residues after combustion are hard ceramic shells, and the composite cable core is not prone to falling off. And the hard shell is not molten and does not drop in a fire environment. When the high-voltage cable is short-circuited and other abnormal conditions occur, the aluminum sheath layer plays a fireproof role and can slow down the spreading of fire behaviors and reduce the loss of fire disasters.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable field, specifically is a kind of aluminium sleeve structure high-voltage cable BACKGROUND

[0002] With the high development of modern industry and the continuous improvement of people's living standards, the demand for electricity is growing. As an important part of the power system, high-voltage power transmission technology plays a vital role. The installation and connection of high-voltage power are also in increasing demand.

[0003] The Chinese utility model patent with publication number CN201616294U discloses a high-voltage and ultra-high-voltage cable with an aluminum sheath, which comprises a conductor, a conductor shield, an insulation layer, an insulation shield, a water-blocking buffer layer, a metal sheath, a sheath layer, and a conductive layer. The metal sheath is a continuous extrusion-coated sheath. The sheath layer is a sheath layer made of a combination of polyethylene plastic and polyvinyl chloride plastic. The conductive layer is an extrusion-coated conductive layer made of polyvinyl chloride plastic with conductive properties.

[0004] The existing technology has the disadvantage of lacking flame retardant properties, which can easily be punctured, causing dangerous accidents. UTILITY MODEL CONTENT

[0005] In order to overcome the above technical defects, the utility model provides a high-voltage cable with an aluminum sleeve structure.

[0006] In order to solve the above problems, the utility model is implemented according to the following technical scheme:

[0007] The high-voltage cable with an aluminum sleeve structure comprises a composite cable core and a protective layer, a water-blocking sheath layer, an aluminum sleeve layer, and a protective layer arranged in order from the inside to the outside.

[0008] The protective layer is a ceramic fiber composite material wrapped around the composite cable core.

[0009] The water-blocking sheath layer wraps the protective layer.

[0010] The aluminum sleeve layer is an aluminum alloy mesh wrapped around the water-blocking sheath layer.

[0011] The protective layer is made of neoprene and wrapped around the aluminum sleeve layer.

[0012] Preferably, the water-blocking sheath layer comprises a water-blocking layer and a water-blocking yarn.

[0013] Preferably, the water-blocking layer is made of high water-absorbing resin.

[0014] Preferably, the water-blocking yarn has a wrapping coverage rate of not less than 20%.

[0015] Preferably, a first fire-retardant layer is arranged between the water-blocking sheath layer and the aluminum sheath layer.

[0016] Preferably, the first fire-retardant layer is a calcined mica tape wrapped around the water-blocking sheath layer.

[0017] Preferably, the composite cable core comprises a conductor, an insulation layer and a second fire-retardant layer.

[0018] The second fire-retardant layer is a calcined mica tape wrapped around the insulation layer.

[0019] Preferably, the conductor is made of copper wire wrapping.

[0020] Preferably, the insulation layer is cross-linked polyethylene.

[0021] Preferably, the aluminum sheath layer has a density of not less than 90%.

[0022] Compared with the prior art, the aluminum sheath structure high-voltage cable has the following beneficial effects:

[0023] The aluminum sheath structure high-voltage cable comprises a composite cable core and a protective layer arranged in sequence from inside to outside, a water-blocking sheath layer, an aluminum sheath layer and a protective layer; the protective layer is a ceramicized silicone rubber wrapped around the composite cable core; the water-blocking sheath layer wraps the protective layer; the aluminum sheath layer is an aluminum alloy net wrapping the water-blocking sheath layer; and the protective layer is made of chloroprene rubber and wraps the aluminum sheath layer.

[0024] The protective layer is wrapped around the composite cable core by ceramicized silicone rubber, the ceramicized silicone rubber is made of ceramicized silicone rubber, the ceramicized silicone rubber is a new type of high polymer fire-resistant material, has excellent fireproof, flame-retardant, low smoke, non-toxic and other characteristics, and has simple extrusion molding process; the combustion residue is a hard ceramic shell, the hard shell does not melt and drip in a fire environment. When the high-voltage cable has abnormal conditions such as short circuit, the fireproof effect of the aluminum sheath layer can slow down the spread of fire and reduce the loss of fire. BRIEF DESCRIPTION OF DRAWINGS

[0025] The specific embodiments of the utility model will be further described in detail below in combination with the drawings, in which:

[0026] Figure 1 is a cross-sectional view of the aluminum sheath structure high-voltage cable of the utility model;

[0027] Figure 2 is a structure cross-sectional view of the composite cable core of the aluminum sheath structure high-voltage cable of the utility model;

[0028] Figure 3 is a water-blocking sheath layer structure diagram of the aluminum sheath structure high-voltage cable of the utility model;

[0029] Fig.:

[0030] 1 - composite cable core, 101 - conductor, 102 - insulation layer, 103 - second flame-retardant layer;

[0031] 2 - protective layer;

[0032] 3 - water-blocking sheath layer, 301 - water-blocking layer, 302 - water-blocking yarn;

[0033] 4 - aluminum sleeve layer;

[0034] 5 - protective layer;

[0035] 6 - first flame-retardant layer. DETAILED DESCRIPTION

[0036] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0037] As Figure 1 is a cross-sectional view of the aluminum sleeve structure high-voltage cable, the aluminum sleeve structure high-voltage cable includes a composite cable core 1 and a protective layer 2, a water-blocking sheath layer 3, an aluminum sleeve layer 4 and a protective layer 5 arranged in sequence from inside to outside;

[0038] The protective layer 2 is a ceramicized silicone rubber wrapped around the composite cable core 1;

[0039] The water-blocking sheath 3 layer wraps the protective layer 2;

[0040] The aluminum sleeve layer 4 is an aluminum alloy woven mesh wrapped around the water-blocking sheath layer 3;

[0041] The protective layer 5 is made of neoprene.

[0042] Optionally, the composite cable core 1 includes a conductor 101, an insulation layer 102 and a second flame-retardant layer 103; the conductor 101 in the composite cable core 1 is made of copper wire wrapping, and the high conductivity of the copper wire has a significant advantage in power transmission, which can carry larger current with smaller cross-sectional area, thereby reducing the energy loss of the line. In this embodiment, the conductor 101 in the composite cable core 1 is made of 3 copper wires wrapped, which makes the conduction more stable and efficient. In addition, the copper wire also has thermal stability, which is safer in use.

[0043] Optionally, the insulating layer 102 in the composite cable core 1 wraps the conductor 101, and the insulating layer 102 is cross-linked polyethylene. In this embodiment, the polyethylene has the characteristics of corrosion resistance, wear resistance, good insulation, non-toxicity, odorlessness, etc. In addition, the polyethylene structure is compact, the permeability to water vapor and air is small, the water absorption is low, and it is not easy to be immersed by the moisture in the external air. The present application uses polyethylene as the material of the insulating layer 102, which further better protects the high-voltage cable from water, guarantees good insulation performance, and is more safe and environmentally friendly.

[0044] Optionally, the second flame-retardant layer 103 is a calcined mica tape wrapped around the insulating layer 102.

[0045] It can be understood that in this embodiment, the calcined mica tape is selected as the insulating material and wrapped around the insulating layer 102, and multiple layers of calcined mica tape are wrapped during cabling. The calcined mica tape is a composite material with extremely low combustion heat.

[0046] Optionally, the protective layer 2 is a ceramic fiber composite material wrapped around the composite cable core 1.

[0047] In this embodiment, the protective layer 2 is a ceramicized silicone rubber tape. It can be understood that the ceramicized silicone rubber tape is made of ceramicized silicone rubber, which is a new type of high-molecular fire-resistant material with excellent fireproof, flame-retardant, low-smoke, and non-toxic properties. The extrusion molding process is simple, and the residue after combustion is a hard ceramic shell that does not melt and drip in a fire environment. The aluminum sleeve structure high-voltage cable of the present application uses a ceramicized silicone rubber tape wrapped around the composite cable core 1 as a protective layer 2, improving the flame retardance and fire resistance of the cable. Even in the event of a fire, it can provide strong protection to the internal cable and ensure smooth power transmission. At the same time, using a ceramicized silicone rubber tape can reduce production energy consumption and save costs.

[0048] Optionally, as shown in Figure 3 the water-blocking sheath layer 3 includes a water-blocking layer 301 and a water-blocking yarn 302. The water-blocking yarn 302 is wrapped around the water-blocking layer 301, and the wrapping coverage rate of the water-blocking yarn 302 is not less than 20%.

[0049] It can be understood that the water-blocking yarn 302 is wrapped around the water-blocking layer 301, which can play a role in isolating moisture. The water-blocking layer 301 is made of high water-absorbing resin. In this embodiment, the high water-absorbing resin is a new type of functional high-molecular material that can absorb a large amount of water and swell while retaining water without flowing out. The present application uses a high water-absorbing resin tape as the water-blocking layer 301 of the water-blocking sheath layer 3, which takes advantage of the properties of high water-absorbing resin to isolate water from entering when the high-voltage cable is damaged, providing double-layer water-blocking protection to protect the insulation safety of the high-voltage cable.

[0050] Optionally, the aluminum sheath layer 4 is an aluminum alloy mesh, which wraps the water-blocking sheath layer 3; the aluminum alloy is used as the material of the aluminum sheath layer 4 of the high-voltage cable because the aluminum alloy can protect the high-voltage cable, isolate the high-voltage cable from the outside world, and prevent the high-voltage cable from being mechanically damaged.

[0051] Optionally, the density of the aluminum sheath layer 4 is not less than 90%, and in the embodiment, the density of the aluminum alloy mesh is not more than 90%, which improves the service life of the high-voltage cable. In addition, the aluminum sheath layer 4 can effectively prevent fire, and when the high-voltage cable has an abnormal situation such as short circuit, the fireproof effect of the aluminum sheath layer 4 can slow down the spread of the fire and reduce the loss of the fire.

[0052] Optionally, a first flame-retardant layer 6 is arranged between the water-blocking sheath layer 3 and the aluminum sheath layer 4. The first flame-retardant layer 6 is a calcined mica tape wrapped on the water-blocking sheath layer 3, which can provide multi-layer flame retardation for the aluminum sheath structure high-voltage cable and improve the safety of the high-voltage cable.

[0053] Optionally, the protective layer 5 is made of neoprene, which wraps the aluminum sheath layer 4.

[0054] It can be understood that in the embodiment, the neoprene cable line can be used in an oil pollution environment for a long time, and has good electrical properties and mechanical strength. The neoprene cable line can be used in an environment of strong corrosive media such as acid and alkali, and its electrical properties will not be affected. The neoprene cable line can be normally used in an extremely high-temperature and low-temperature environment, and can adapt to various severe weather conditions. The neoprene is used as the material of the outermost protective layer 5, so that the protective layer 5 has good oil resistance, excellent acid and alkali resistance, and good high and low temperature resistance.

[0055] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A high voltage cable of the aluminium bushing construction, characterized in that, The composite cable core (1) and the protective layer (2) are sequentially arranged from inside to outside, a water-blocking sheath layer (3), an aluminum sheath layer (4) and a protective layer (5); The protective layer (2) is a ceramicized silicone rubber tape wrapped around the composite cable core (1); The water-blocking sheath layer (3) wraps the protective layer (2); The aluminum sheath layer (4) is an aluminum alloy mesh wrapped around the water-blocking sheath layer (3); The protective layer (5) is made of neoprene and wrapped around the aluminum sheath layer (4).

2. A high voltage cable with an aluminum jacket structure according to claim 1, characterized in that, The water-blocking sheath layer (3) includes a water-blocking layer (301) and a water-blocking yarn (302).

3. A high voltage cable with an aluminum jacket structure according to claim 2, characterized in that, The water-blocking layer (301) is made of high water-absorbing resin.

4. A high voltage cable with an aluminum jacket structure according to claim 2, characterized in that, The water-blocking yarn (302) has a wrapping coverage rate of not less than 20%.

5. A high voltage cable with an aluminum jacket structure according to claim 1, characterized in that, A first fire-retardant layer (6) is arranged between the water-blocking sheath layer (3) and the aluminum sheath layer (4).

6. A high voltage cable with an aluminum jacket structure according to claim 5, characterized in that The first fire-retardant layer (6) is a calcined mica tape wrapped around the water-blocking sheath layer (3).

7. A high voltage cable with an aluminum jacket structure according to claim 1, characterized in that, The composite cable core includes a conductor (101), an insulating layer (102) and a second fire-retardant layer (103); The second fire-retardant layer (103) is a calcined mica tape wrapped around the insulating layer.

8. A high voltage cable with an aluminum jacket structure according to claim 7, characterized in that The conductor (101) is made of copper wire wrapping.

9. A high voltage cable with an aluminum jacket structure according to claim 7, characterized in that, The insulating layer (102) is cross-linked polyethylene.

10. A high voltage cable with an aluminum jacket structure according to claim 1, characterized in that, The density of the aluminum sheath layer (4) is not less than 90%.

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