Aerial insulated cable

Abstract

The utility model relates to the technical field of cables, in particular to an aerial insulated cable which comprises an inner core, the inner core comprises a wire and a first insulating layer, the two ends of the inner core are connected with a telegraph pole, the inner core is connected with a bearing cable, the bearing cable is connected with the telegraph pole, and the effect of reducing drooping of the aerial cable is achieved.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to overhead insulated cables. Background Art

[0002] Overhead cable refers to a method of power transmission that transmits electricity through the air by hanging or laying power wires on brackets or towers, especially in rural areas.

[0003] Existing cables will sag due to being suspended, which will reduce the height of the cables and increase the risk of cables rubbing against vehicles. The sagging of the cables will cause uneven stress on the cables, shortening their service life and increasing the risk of cable breakage. Utility Model Content

[0004] In order to reduce the sagging of the overhead cable, the present application provides an overhead insulated cable.

[0005] The above technical objectives of this application are achieved through the following technical solutions:

[0006] An overhead insulated cable comprises an inner core, wherein the inner core comprises a conductor and a first insulating layer, two ends of the inner core are connected to a utility pole, the inner core is connected to a load-bearing cable, and the load-bearing cable is connected to the utility pole.

[0007] By adopting the above solution, the inner core is supported by providing a supporting structure, thereby reducing the sagging of the inner core.

[0008] Optionally, the load-bearing cable is a load-bearing cable composed of steel wire ropes.

[0009] By adopting the above technical solution, the steel wire rope has a higher tensile strength. After the steel wire rope is tensioned, it can withstand the gravity of the wire core. The steel wire rope is not easy to rust and has a longer service life.

[0010] Optionally, the load-bearing cable is connected to a connecting sleeve, and the connecting sleeve is arranged on the outside of the inner core.

[0011] By adopting the above technical solution, the load-bearing cable is connected to the inner core through the connecting sleeve, so that the inner core and the load-bearing cable can move relative to each other within a certain range. Even if the connection between the load-bearing cable and the inner core is a flexible connection, the relative movement of the inner core of the load-bearing cable can buffer a certain force.

[0012] Optionally, the connecting sleeve is connected to a sliding sleeve, and the sliding sleeve is slidably connected to the load-bearing cable.

[0013] By adopting the above technical solution, the load-bearing cable and the inner core can also undergo relative displacement in the axial direction, so that when the connecting sleeve is connected to the load-bearing cable, the sliding sleeve can slide into one end of the load-bearing cable, making the connection between the load-bearing cable and the inner core more convenient.

[0014] Optionally, a second insulating layer is provided at the connection between the inner core and the utility pole.

[0015] By adopting the above technical solution, the insulation between the inner core and the electric pole is further strengthened, the current in the cable returns to the ground mainly through the electric pole, and adding an insulating layer at the connection with the electric pole will not affect the sagging of the cable.

[0016] Optionally, three inner cores are provided, and the second insulating layer is wrapped around the outside of the three inner cores.

[0017] By adopting the above technical solution, the three cores are combined into one main body, which makes the installation of the cable more convenient and the molding speed of the second insulating layer faster.

[0018] Optionally, a filling layer is provided between the second insulating layer and the three inner cores.

[0019] By adopting the above technical solution, a filling layer is provided to fill the gaps between the three inner cores and the second insulating layer, so that the cross section of the cable is more rounded, while reducing the mutual friction between the three inner cores and increasing the service life of the inner cores.

[0020] Optionally, a fireproof layer is provided between the filling layer and the second insulating layer.

[0021] By adopting the above technical solution, the fireproof layer is provided to increase the protection of the inner core and improve the fireproof performance of the cable.

[0022] In summary, this application has the following technical effects:

[0023] The inner core is supported by load-bearing cables, thereby reducing the sagging of the inner core;

[0024] By providing a second insulating layer at the connection between the inner core and the electric pole, the insulation performance of the inner core is increased;

[0025] The fireproof performance of the cable is improved by setting up a fireproof layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of this application;

[0027] Figure 2 This application intends to emphasize the partial structural cross-sectional view of the connection between the load-bearing cable and the utility pole;

[0028] Figure 3 This application is intended to emphasize the partial structural diagram of the connecting sleeve.

[0029] In the figure, 1, inner core; 11, conductor; 12, first insulating layer; 2, load-bearing cable; 3, connecting sleeve; 31, sliding sleeve; 4, filling layer; 5, fireproof layer; 6, second insulating layer; 7, electric pole. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1 An overhead insulated cable includes an inner core 1, the inner core 1 is connected to a utility pole 7, the utility pole is connected to a load-bearing cable 2, and the load-bearing cable 2 is connected to the inner core 1. The load-bearing cable 2 is provided to support the inner core 1 to offset the influence of gravity on the inner core 1, thereby reducing the sagging of the cable.

[0032] Reference Figure 2 The inner core 1 includes a conductor 11 and a first insulating layer 12. The conductor 11 is composed of a plurality of copper wires. The copper wire has good conductivity. Compared with iron wire, the copper wire has less power loss during power transmission. Compared with iron wire, the copper wire is lighter, which is more conducive to reducing the sagging of the inner core 1. It is used to transmit electricity. The first insulating layer 12 is wrapped around the outside of the conductor 11 to isolate the conductor 11 from the outside world to prevent the power in the conductor 11 from leaking out and causing safety hazards. The first insulating layer 12 is composed of insulating rubber. The insulating rubber has good insulation and is low in cost. It is a good insulating material. The thickness of the rubber insulating layer is 1-3mm. The rubber insulated cable within this range can effectively separate the conductor 11 from the outside world, while reducing the weight of the inner core 1 as much as possible, thereby reducing the sagging of the inner core 1.

[0033] Reference Figure 1 and Figure 2 Every three inner cores 1 form a group, and each group of inner cores 1 is wrapped with a second insulating layer 6 at the contact point with the electric pole 7. The second insulating layer 6 is made of rubber, and the thickness of the second insulating layer 6 is 5-8mm. Since the second insulating layer 6 is located directly above the electric pole 7, the gravity of the second insulating layer 6 directly acts on the electric pole 7, and the electric pole 7 offsets the gravity of the second insulating layer 6. Therefore, the second insulating layer 6 does not affect the sagging of the inner core 1. The electric energy in the cable is mainly returned to the ground through the electric pole 7, so it is only necessary to increase the insulation of the cable at the connection between the cable and the electric pole 7. Arranging the three inner cores 1 as a group allows operators to install the cable more conveniently, and also makes the molding of the second insulating layer 6 more time-saving and labor-saving.

[0034] A fireproof layer 5 is provided between the second insulating layer 6 and the inner core 1. The fireproof layer 5 can effectively prevent the fire from spreading along the cable, play a role in fire and heat insulation, reduce heat transfer, reduce the impact on the surrounding environment and other cables, and prolong the burning time, buying more time for fire extinguishing and personnel evacuation. The fireproof layer 5 is composed of mica tape, which has good high temperature resistance and fireproof performance, and can meet the fireproof requirements of the fireproof layer 5. A filling layer 4 is provided between the fireproof layer 5 and the inner core 1. The material of the filling layer 4 is polypropylene rope. The filling layer 4 fills the gap between the inner core 1 and the fireproof layer 5, so that the cross section of the cable is kept as round as possible, and the structure of the cable is made tighter.

[0035] Reference Figure 1 and Figure 3 The load-bearing cable 2 is fixedly connected to the electric pole 7. The load-bearing cable 2 is located above the inner core 1. The load-bearing cable 2 is made of steel wire. The steel wire has high tensile strength and can provide the support required to support the inner core 1. A connecting sleeve 3 is provided on the outside of the inner core 1. The connecting sleeve 3 wraps the three inner cores 1. The connecting sleeve 3 is connected to a sliding sleeve 31. The sliding sleeve 31 is slidably connected to the load-bearing cable 2. The connecting sleeve 3 and the sliding sleeve 31 connect the inner core 1 and the load-bearing cable 2, and the connection between the inner core 1 and the load-bearing cable 2 is a flexible connection. When the wind blows the inner core 1, the inner core 1 and the load-bearing cable 2 generate relative movement, so that the inner core 1 generates a buffer, thereby offsetting part of the wind force, and extending the service life of the load-bearing cable 2 and the inner core 1.

[0036] The specific implementation principle of the present application is: by setting the load-bearing cable 2 to be fixedly connected with the electric pole 7, and connecting the load-bearing cable 2 with the inner core 1 through the sliding sleeve 31 and the connecting sleeve 3, the load-bearing cable 2 provides a certain support for the suspended part of the inner core 1, thereby reducing the sagging of the cable. At the same time, a fireproof layer 5 and a second insulating layer 6 are set at the connection between the inner core 1 and the electric pole 7, which can increase the fireproof and insulation performance of the cable without affecting the sagging of the cable, thereby achieving the purpose of improving the cable performance and reducing the cable sagging.

[0037] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An overhead insulated cable, characterized in that: The utility model comprises an inner core (1), wherein the inner core (1) comprises a conductor (11) and a first insulating layer (12), wherein two ends of the inner core (1) are connected to an electric pole (7), and the inner core (1) is connected to a load-bearing cable (2), and the load-bearing cable (2) is connected to the electric pole (7).

2. The overhead insulated cable according to claim 1, characterized in that: The load-bearing cable (2) is a load-bearing cable (2) composed of steel wire ropes.

3. The overhead insulated cable according to claim 1, characterized in that: The load-bearing cable (2) is connected to a connecting sleeve (3), and the connecting sleeve (3) is sleeved on the outside of the inner core (1).

4. The overhead insulated cable according to claim 3, characterized in that: The connecting sleeve (3) is connected to a sliding sleeve (31), and the sliding sleeve (31) is slidably connected to the load-bearing cable (2).

5. The overhead insulated cable according to claim 1, characterized in that: A second insulating layer (6) is provided at the connection between the inner core (1) and the electric pole (7).

6. The overhead insulated cable according to claim 5, characterized in that: The inner cores (1) are provided in three numbers, and the second insulating layer (6) is wrapped around the outside of the three inner cores (1).

7. The overhead insulated cable according to claim 6, characterized in that: A filling layer (4) is provided between the second insulating layer (6) and the three inner cores (1).

8. The overhead insulated cable according to claim 7, characterized in that: A fireproof layer (5) is provided between the filling layer (4) and the second insulating layer (6).

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