Aerial insulated cable with high bearing capacity

Abstract

The utility model discloses an aerial insulated cable with strong bearing capacity, which comprises a cable inner core, the outer surface of the cable inner core is fixedly connected with an inner shielding layer, the outer surface of the inner shielding layer is fixedly connected with an inner insulating layer, and the outer surface of the inner insulating layer is fixedly connected with a flame-retardant layer. According to the aerial insulated cable with the high bearing capacity, the inner shielding layer and the outer shielding layer are made of flexible semi-conductive plastic, a good shielding effect is achieved on pulse voltage generated under the electromagnetic effect, and therefore the bearing capacity of the aerial insulated cable is improved, and the service life of the aerial insulated cable is prolonged. The inner insulating layer and the outer insulating layer are made of cross-linked polyolefin, the cross-linked polyolefin is a thermosetting material and can be stably combined with the inner core of the cable to avoid an insulation cracking phenomenon caused by non-uniform shrinkage of a matrix, and the reinforcing rings and the reinforcing ribs in the cable can effectively increase the strength and hardness of the cable and ensure the supporting capacity of the cable; and the bearing capacity is improved.

Description

Technical Field

[0001] This utility model relates to the field of overhead insulated cable technology, and in particular to an overhead insulated cable with high load-bearing capacity. Background Technology

[0002] Overhead cables (full name: overhead insulated cables) are overhead conductors equipped with insulation layers and protective sheaths. They are a special type of cable manufactured using a process similar to that of cross-linked cables. They represent a new power transmission method between overhead conductors and underground cables. Overhead cables are all single-core and can be classified according to their structure 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 core can be hard aluminum or hard copper wire), etc.

[0003] A search revealed a Chinese utility model patent publication number CN202816479U, which discloses an overhead insulated cable. This cable incorporates a carbon fiber composite core and a conductive core shielding layer. The conductive core can be configured as multiple strands according to power transmission requirements, and these multiple strands are twisted together on the carbon fiber composite core. The carbon fiber composite core is made of carbon fiber, glass fiber, and epoxy resin composite, possessing high tensile strength. However, existing overhead cables have poor load-bearing capacity, making them unsuitable for long-distance installation. Furthermore, their insulation and shielding performance are poor, failing to effectively isolate pulse voltages generated by electromagnetic effects. Therefore, a high-load-bearing overhead insulated cable is needed. Utility Model Content

[0004] The main objective of this invention is to provide an overhead insulated cable with high load-bearing capacity, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-load-bearing overhead insulated cable includes a cable core, an inner shielding layer fixedly connected to the outer surface of the inner core, an inner insulation layer fixedly connected to the outer surface of the inner shielding layer, a flame-retardant layer fixedly connected to the outer surface of the inner insulation layer, a heat insulation layer fixedly connected to the outer surface of the flame-retardant layer, a reinforcing ring fixedly connected to the outer surface of the heat insulation layer, a reinforcing rib fixedly connected to one end of the reinforcing ring, an outer shielding layer fixedly connected to the outer surface of the reinforcing ring, an outer insulation layer fixedly connected to the outer surface of the outer shielding layer, and a wear-resistant layer fixedly connected to the outer surface of the outer insulation layer.

[0007] In order to achieve the effect of forming the inner core of the cable, as a high-load-bearing overhead insulated cable of this utility model, the inner core of the cable includes a filling layer, a main conductor is fixedly connected to the inner wall of the filling layer, and a secondary conductor is fixedly connected to the inner wall of the filling layer, with a number of nine secondary conductors.

[0008] In order to achieve the effect of isolating pulse voltage, the inner shielding layer and the outer shielding layer of this utility model are made of flexible semi-conductive plastic as a high-load-bearing overhead insulated cable.

[0009] In order to ensure the insulation performance of the cable, the inner and outer insulation layers of the overhead insulated cable with high load-bearing capacity of this utility model are made of cross-linked polyolefin.

[0010] In order to achieve the effect of flame retardant properties for the cable, the flame retardant layer of the overhead insulated cable with high load-bearing capacity of this utility model is made of asbestos.

[0011] In order to achieve the effect of heat insulation performance of the cable, the heat insulation layer of the overhead insulated cable with high load-bearing capacity of this utility model is made of silicone.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This high-load-bearing overhead insulated cable features an inner core, inner shielding layer, inner insulation layer, reinforcing ring, reinforcing rib, outer shielding layer, and outer insulation layer. The inner core is encased in a two-layer shielding structure, with both inner and outer shielding layers made of flexible semi-conductive plastic, providing excellent shielding against pulse voltages generated by electromagnetic effects. Simultaneously, the inner core is encased in a two-layer insulation structure, with both inner and outer insulation layers made of cross-linked polyolefin. Because cross-linked polyolefin is a thermosetting material, it can stably bond with the cable core, preventing insulation cracking caused by uneven shrinkage of the matrix. The reinforcing ring and reinforcing rib effectively increase the cable's strength and rigidity, ensuring its support capacity and improving its load-bearing capacity. This enhances the cable's insulation and shielding performance, and strengthens the load-bearing capacity of the overhead cable.

[0014] 2. This high-load-bearing overhead insulated cable features a flame-retardant layer and a heat-insulating layer. The flame-retardant layer, made of asbestos, effectively prevents the cable from burning, while the heat-insulating layer, made of silicone, isolates the cable from internal and external heat. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an overhead insulated cable with high load-bearing capacity according to an embodiment of the present invention;

[0016] Figure 2 This is a frontal cross-sectional view of an overhead insulated cable with high load-bearing capacity according to an embodiment of the present invention.

[0017] Figure 3 This is an isometric structural diagram of a reinforcing rib in an overhead insulated cable with high load-bearing capacity, according to an embodiment of the present invention.

[0018] Figure 4 This is an isometric structural diagram of the inner core of an overhead insulated cable with high load-bearing capacity, according to an embodiment of this utility model.

[0019] In the diagram: 1. Cable inner core; 101. Main core; 102. Secondary core; 103. Filler layer; 2. Inner shielding layer; 3. Inner insulation layer; 4. Flame retardant layer; 5. Heat insulation layer; 6. Reinforcing ring; 7. Reinforcing rib; 8. Outer shielding layer; 9. Outer insulation layer; 10. Wear-resistant layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example

[0022] like Figure 1-4 As shown, a high-load-bearing overhead insulated cable includes a cable core 1, an inner shielding layer 2 fixedly connected to the outer surface of the cable core 1, an inner insulation layer 3 fixedly connected to the outer surface of the inner shielding layer 2, a flame-retardant layer 4 fixedly connected to the outer surface of the inner insulation layer 3, a heat insulation layer 5 fixedly connected to the outer surface of the flame-retardant layer 4, a reinforcing ring 6 fixedly connected to the outer surface of the heat insulation layer 5, a reinforcing rib 7 fixedly connected to one end of the reinforcing ring 6, an outer shielding layer 8 fixedly connected to the outer surface of the reinforcing ring 6, an outer insulation layer 9 fixedly connected to the outer surface of the outer shielding layer 8, and a wear-resistant layer 10 fixedly connected to the outer surface of the outer insulation layer 9.

[0023] In practical use, the cable consists of an inner core 1, an inner shielding layer 2, an inner insulation layer 3, a reinforcing ring 6, a reinforcing rib 7, an outer shielding layer 8, and an outer insulation layer 9. The inner core 1 is wrapped with two shielding layers, the inner shielding layer 2 and the outer shielding layer 8, which are made of flexible semi-conductive plastic and provide good shielding against pulse voltages generated by electromagnetic effects. Simultaneously, the inner core 1 is wrapped with two insulation layers, the inner insulation layer 3 and the outer insulation layer 9, which are made of cross-linked polyolefin. Because cross-linked polyolefin is a thermosetting material, it can stably bond with the inner core 1, preventing insulation cracking caused by uneven shrinkage of the matrix. The reinforcing ring 6 and the reinforcing rib 7 effectively increase the cable's strength and rigidity, ensuring its support capacity and improving its load-bearing capacity. This enhances the cable's insulation and shielding performance, and strengthens the load-bearing capacity of the overhead cable.

[0024] In this embodiment, the inner core 1 of the cable includes a filling layer 103, a main wire core 101 is fixedly connected to the inner wall of the filling layer 103, and a secondary wire core 102 is fixedly connected to the inner wall of the filling layer 103. The number of secondary wire cores 102 is nine.

[0025] In practical use, the cable core can be formed by setting the main conductor 101, the auxiliary conductor 102 and the filling layer 103.

[0026] In this embodiment, the inner shielding layer 2 and the outer shielding layer 8 are made of flexible semi-conductive plastic.

[0027] In practical use, the pulse voltage is isolated by setting the inner shielding layer 2 and the outer shielding layer 8.

[0028] In this embodiment, the inner insulating layer 3 and the outer insulating layer 9 are made of cross-linked polyolefin.

[0029] In practical use, the insulation performance of the cable is ensured by setting the inner insulation layer 3 and the outer insulation layer 9.

[0030] In this embodiment, the flame-retardant layer 4 is made of asbestos.

[0031] In practical use, the flame-retardant layer 4 enables the cable to have flame-retardant properties.

[0032] In this embodiment, the material of the heat insulation layer 5 is silicone.

[0033] In practical use, the cable has heat insulation properties through the setting of the heat insulation layer 5.

[0034] Working principle: The cable core 1 is wrapped with two shielding structures: an inner shielding layer 2 and an outer shielding layer 8. The inner shielding layer 2 and the outer shielding layer 8 are made of flexible semi-conductive plastic, which has a good shielding effect against pulse voltage generated under electromagnetic effects. At the same time, the cable core 1 is wrapped with two insulation structures: an inner insulation layer 3 and an outer insulation layer 9. The inner insulation layer 3 and the outer insulation layer 9 are made of cross-linked polyolefin. Since cross-linked polyolefin is a thermosetting material, it can be stably bonded with the cable core 1 to avoid insulation cracking caused by uneven shrinkage of the matrix. The reinforcing ring 6 and reinforcing rib 7 in the cable can effectively increase the strength and hardness of the cable, ensure the support capacity of the cable, and improve its load-bearing capacity. The flame-retardant layer 4 made of asbestos material can effectively prevent the cable from burning. The heat insulation layer 5 made of silicone can isolate the heat inside and outside the cable.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A strong load bearing overhead insulated electrical cable comprising a cable core (1), characterized in that: The outer surface of the cable inner core (1) is fixedly connected with an inner shielding layer (2), the outer surface of the inner shielding layer (2) is fixedly connected with an inner insulation layer (3), the outer surface of the inner insulation layer (3) is fixedly connected with a flame-retardant layer (4), the outer surface of the flame-retardant layer (4) is fixedly connected with a heat insulation layer (5), the outer surface of the heat insulation layer (5) is fixedly connected with a reinforcing ring (6), one end of the reinforcing ring (6) is fixedly connected with a reinforcing rib (7), the outer surface of the reinforcing ring (6) is fixedly connected with an outer shielding layer (8), the outer surface of the outer shielding layer (8) is fixedly connected with an outer insulation layer (9), and the outer surface of the outer insulation layer (9) is fixedly connected with a wear-resistant layer (10).

2. The overhead power cable according to claim 1, wherein: The cable inner core (1) comprises a filling layer (103), the inner wall of the filling layer (103) is fixedly connected with a main wire core (101), and the inner wall of the filling layer (103) is fixedly connected with a secondary wire core (102).

3. The overhead power cable according to claim 1, wherein: The materials of the inner shielding layer (2) and the outer shielding layer (8) are flexible semiconductive plastics.

4. The overhead power cable of claim 1, wherein: The materials of the inner insulation layer (3) and the outer insulation layer (9) are crosslinked polyolefins.

5. The overhead power cable of claim 1, wherein: The material of the flame-retardant layer (4) is asbestos.

6. The overhead power cable of claim 1, wherein: The material of the heat insulation layer (5) is silica gel.

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