An aerial insulated cable

Abstract

This application relates to an overhead insulated cable, belonging to the technical field of cables. It includes a main insulation layer and multiple strands of conductor cores. A conductor core shielding layer is provided outside the conductor cores. A carbon fiber composite core rod is provided between the multiple strands of conductor cores. Multiple partition rings are provided within the main insulation layer. Each partition ring includes a fixed ring and a connecting ring coaxially arranged. A groove is formed on the end face of the fixed ring, and the connecting ring is threaded into the groove. The partition rings and the connecting ring are respectively fixed to partition sections. A rotating ring is rotatably connected to the end face of the connecting ring, and the rotating ring is coaxially arranged with the connecting ring. A reinforcing steel rope is fixedly connected to the end face of the rotating ring, with the end of the reinforcing steel rope away from the rotating ring fixedly connected to the end face of the fixed ring. The reinforcing steel rope passes through the main insulation layer. This application has the effect of improving the tensile strength of the cable.

Description

Technical Field

[0001] This application relates to the technical field of cables, and in particular to an overhead insulated cable. Background Technology

[0002] In the field of power transmission, overhead insulated cables are a crucial component. With the continuous growth of electricity demand and the ongoing development of power grids, the performance and reliability of overhead insulated cables are becoming increasingly critical. They are widely used in urban and rural power distribution networks, providing a stable power supply for various electrical devices and playing a vital role in ensuring the normal operation of social production and daily life. At the same time, the development of overhead insulated cables has also contributed to the intelligentization and efficiency of power systems to a certain extent.

[0003] In existing technologies, conventional methods are typically employed to ensure the performance of overhead insulated cables. For example, to protect the conductor cores, a conductor core shielding layer is installed outside the conductor cores to reduce the impact of external interference. Regarding the main insulation layer, a single, integral insulation structure is used to guarantee the cable's insulation performance. Furthermore, to enhance cable strength, some methods involve adding a protective layer to the outside of the cable or using high-strength materials to construct the cable sheath.

[0004] However, existing technologies have significant drawbacks. The current structure of overhead insulated cables is ill-suited to effectively handle the stretching and twisting that may occur during cable use. The single, integral main insulation layer is easily damaged under external forces, and there is a lack of effective reinforcement structures to improve the overall strength and stability of the cable. This may affect the cable's service life and the safety of power transmission. Summary of the Invention

[0005] To improve the tensile strength of cables, this application provides an overhead insulated cable.

[0006] The overhead insulated cable provided in this application adopts the following technical solution: An overhead insulated cable includes a main insulation layer and multiple conductor cores. Each conductor core is surrounded by a conductor core shielding layer. A carbon fiber composite core rod is disposed between the multiple conductor cores. The main insulation layer contains multiple partition rings that divide the main insulation layer into multiple segments. Each partition ring includes a fixed ring and a connecting ring coaxially arranged. A groove is formed on the end face of the fixed ring, and the connecting ring is threaded into the groove. The partition rings and the connecting ring are respectively fixed to the partition segments. A rotating ring is rotatably connected to the end face of the connecting ring, and the rotating ring is coaxially arranged with the connecting ring. A reinforcing steel rope is fixedly connected to the end face of the rotating ring, with the end of the reinforcing steel rope away from the rotating ring fixedly connected to the end face of the fixed ring. The reinforcing steel rope passes through the main insulation layer.

[0007] By adopting the above technical solution, setting a carbon fiber composite core rod inside the conductor core can improve the strength and stability of the cable. By setting a partition ring inside the main insulation layer to divide it into multiple partition segments, the insulation performance of the cable can be enhanced. When the cable is damaged, the damaged cable segment can be replaced entirely by rotating the connecting ring. At the same time, the setting of the rotating ring and the reinforcing steel rope can enhance the structural strength and tensile performance of the cable. Finally, the reinforcing steel rope is threaded inside the main insulation layer to protect the reinforcing steel rope and enhance the stability of the overall structure, thereby improving the tensile performance of the cable.

[0008] Optionally, the length of the reinforcing steel rope is longer than the length of the dividing section, and a placement cavity is provided in the main insulation layer to provide placement space for the reinforcing steel rope.

[0009] By adopting the above technical solution, the length of the reinforcing steel rope is longer than the length of the partition segment, and a cavity is opened in the main insulation layer. This provides a buffer space when the cable deforms or expands thermally, preventing the reinforcing steel rope from being damaged due to cable deformation, and improving the reliability and service life of the cable.

[0010] Optionally, the outer wall of the partition ring is provided with a raised insulating layer, the raised insulating layer is arranged around the partition ring, and the raised insulating layer is integrally formed with the main insulating layer.

[0011] By adopting the above technical solution, the raised insulation layer integrated with the main insulation layer on the outer wall of the isolation ring can further enhance the insulation performance of the cable. At the same time, when the cable needs to be repaired, the position of the isolation ring can be accurately located through the raised insulation layer, improving the convenience of maintenance.

[0012] Optionally, the reinforcing steel rope is provided as a plurality of ropes, and the plurality of reinforcing steel ropes are arranged at equal intervals around the axis of the rotating ring.

[0013] By adopting the above technical solution, multiple reinforcing steel ropes are equidistantly arranged around the axis of the rotating ring, which can make the cable more uniformly stressed and further improve the overall stability and tensile strength of the cable.

[0014] Optionally, a detection cable is threaded through the main insulation layer, the detection cable is arranged parallel to the conductor core, one end of the detection cable is connected to the rotating ring, and the other end of the detection cable is connected to the fixed ring.

[0015] By adopting the above technical solution, a detection cable parallel to the conductor core is installed inside the main insulation layer. Since the detection cable is also likely to be damaged when the conductor core is damaged, a rotating ring and a fixed ring are connected to both ends of the detection cable, which can detect the cable status in each segment. It can detect possible faults and abnormalities in the cable without damaging the main structure of the cable, and facilitate timely identification of the segment where the problem occurred.

[0016] Optionally, a detection groove is provided inside the fixing ring, and one end of the detection cable is fixedly connected inside the detection groove.

[0017] By adopting the above technical solution, a detection groove is opened in the fixed ring and one end of the detection cable is fixed in the detection groove, which facilitates the connection and maintenance of the detection cable and ensures the stable operation of the detection function.

[0018] Optionally, a rubber plug is threaded onto the opening of the detection groove.

[0019] By adopting the above technical solution, a detection groove is opened in the fixing ring to fix one end of the detection cable. On this basis, the threaded rubber plug at the opening of the detection groove can prevent external dust, moisture and other substances from entering the detection groove, protect the connection end of the detection cable and ensure that the detection work is carried out normally.

[0020] Optionally, a limiting spring is fixedly connected to the end face of the fixing ring, and a mounting plate is provided at the end of the limiting spring away from the fixing ring, and the mounting plate is fixed to the detection cable.

[0021] By adopting the above technical solution, the external force on the detection cable can be buffered, reducing the damage to the detection cable due to external force and ensuring the normal operation of the detection function. At the same time, when the detection cable breaks, the limiting spring can restrict its position, reducing the possibility of the break being difficult to remove from the main insulation layer.

[0022] Optionally, the conductor core shielding layer is made of cross-linked or non-cross-linked semi-conductive material.

[0023] By adopting the above technical solutions and using cross-linked or non-cross-linked semi-conductive materials to make the conductive core shielding layer, the electric field can be effectively shielded, electromagnetic interference can be reduced, the electrical performance of the cable can be kept stable, and the safety and reliability of the cable can be improved.

[0024] Optionally, both the main insulation layer and the raised insulation layer are made of black cross-linked polyethylene insulation material for overhead insulated cables.

[0025] By adopting the above technical solution, the main insulation layer and the raised insulation layer are made of black cross-linkable polyethylene insulation material used in overhead insulated cables, which can improve the insulation performance and weather resistance of the cable.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The multi-strand conductor core is equipped with a carbon fiber composite core rod, and the main insulation layer is equipped with a partition ring and a reinforcing steel rope, which can improve the overall strength and stability of the cable and effectively cope with tension, torsion and other conditions; 2. The isolation ring divides the main insulation layer into multiple isolation segments, which can prevent the single integral main insulation layer from being damaged by external forces and improve the service life of the cable; 3. A test cable is installed inside the main insulation layer to detect the condition of the cable and ensure the safety of power transmission. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the placement cavity according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the detection cable according to an embodiment of this application; Figure 4 This is a schematic diagram of the annular groove in an embodiment of this application.

[0028] In the diagram, 1 is the main insulation layer; 11 is the dividing section; 2 is the conductor core; 3 is the conductor core shielding layer; 4 is the isolation ring; 41 is the fixing ring; 411 is the ring groove; 412 is the detection groove; 42 is the connecting ring; 421 is the rotating ring; 5 is the reinforcing steel rope; 6 is the placement cavity; 7 is the raised insulation layer; 8 is the detection cable; 9 is the rubber plug; 10 is the limit spring; 101 is the mounting plate; and 102 is the carbon fiber composite core rod. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0030] An embodiment of this application is: an overhead insulated cable, referring to... Figure 1 , Figure 2 and Figure 3 It includes a main insulation layer 1 and a multi-strand conductor core 2. The conductor core 2 is surrounded by a conductor core shielding layer 3, which is made of cross-linked or non-cross-linked semi-conductive material. A carbon fiber composite core rod 102 is provided between the multi-strand conductor cores 2, and the carbon fiber composite core rod 102 is placed in the center of the main insulation layer 1.

[0031] The main insulation layer 1 is provided with multiple blocking rings 4. The multiple blocking rings are equidistantly arranged along the length direction of the main insulation layer 1, and the blocking rings 4 divide the main insulation layer 1 into multiple partition segments 11.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The partition ring 4 includes a fixed ring 41 and a connecting ring 42 arranged coaxially. A groove 411 is formed on the end face of the fixed ring 41, surrounding its axis. The connecting ring 42 is threaded into the groove 411. The partition ring 4 and the connecting ring 42 are fixed to both ends of the partition section 11. A raised insulating layer 7 is provided on the outer wall of the partition ring 4. Both the main insulating layer 1 and the raised insulating layer 7 are made of black cross-linked polyethylene insulating material used in overhead insulated cables.

[0033] A raised insulating layer 7 surrounds the isolation ring 4, and the raised insulating layer 7 is integrally formed with the main insulating layer 1. Therefore, when cable repair is required, the position of the isolation ring 4 can be accurately located through the raised insulating layer 7.

[0034] A rotating ring 421 is rotatably connected to the end face of the connecting ring 42 away from the partition ring 4. The rotating ring 421 is coaxially arranged with the connecting ring 42. A reinforcing steel rope 5 is fixedly connected to the end face of the rotating ring 421. The length of the reinforcing steel rope 5 is longer than the length of the partition segment 11. A placement cavity 6 is provided in the main insulation layer 1 to provide placement space for the reinforcing steel rope 5.

[0035] Multiple reinforcing steel ropes 5 are provided. In this embodiment, four reinforcing steel ropes 5 are provided, and the four reinforcing steel ropes 5 are equidistantly arranged around the axis of the rotating ring 421. The end of the reinforcing steel rope 5 away from the rotating ring 421 is fixedly connected to the end face of the fixed ring 41, and the reinforcing steel rope 5 is passed through the main insulation layer 1.

[0036] A detection cable 8 is threaded through the main insulation layer 1, parallel to the conductor core 2. One end of the detection cable 8 is connected to a rotating ring 421, and the other end of the detection cable 8 is connected to a fixed ring 41 with a detection groove 412. One end of the detection cable 8 is fixedly connected to the detection groove 412, and a rubber plug 9 is threaded onto the groove opening. Therefore, when the conductor core 2 is damaged, the detection cable 8 is also highly likely to be damaged. By connecting the rotating ring 421 and the fixed ring 41 at both ends of the detection cable 8, the cable condition within each segment 11 can be detected. This allows for the discovery of potential faults and abnormalities in the cable without damaging its main structure, facilitating the timely identification of problematic segments 11.

[0037] A limiting spring 10 is fixedly connected to the end face of the fixing ring 41. The end of the limiting spring 10 away from the fixing ring 41 is provided with a mounting plate 101. The mounting plate 101 is fixed on the detection cable 8. When the detection cable 8 breaks, the limiting spring 10 can limit its position and reduce the possibility of the cable breaking inside the main insulation layer 1 and being difficult to remove.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An overhead insulated cable, comprising a main insulation layer (1) and a multi-strand conductor core (2), wherein the conductor core (2) is provided with a conductor core shielding layer (3), characterized in that, A carbon fiber composite core rod (102) is provided between the multiple strands of the conductor core (2). Multiple partition rings (4) are provided within the main insulation layer (1). The partition rings (4) divide the main insulation layer (1) into multiple partition segments (11). Each partition ring (4) includes a fixed ring (41) and a connecting ring (42) arranged coaxially. A ring groove (411) is formed on the end face of the fixed ring (41). The connecting ring (42) is threaded into the ring groove (411). The partition rings (411)... The connecting ring (42) and the connecting ring (42) are respectively fixed on the partition section (11). A rotating ring (421) is rotatably connected to the end face of the connecting ring (42). The rotating ring (421) is coaxially arranged with the connecting ring (42). A reinforcing steel rope (5) is fixedly connected to the end face of the rotating ring (421). The end of the reinforcing steel rope (5) away from the rotating ring (421) is fixedly connected to the end face of the fixed ring (41). The reinforcing steel rope (5) is passed through the main insulation layer (1).

2. The overhead insulated cable according to claim 1, characterized in that, The length of the reinforcing steel rope (5) is longer than the length of the dividing section (11), and a placement cavity (6) is provided in the main insulation layer (1) to provide placement space for the reinforcing steel rope (5).

3. An overhead insulated cable according to claim 1, characterized in that, The outer wall of the partition ring (4) is provided with a raised insulating layer (7), the raised insulating layer (7) is arranged around the partition ring (4), and the raised insulating layer (7) is integrally arranged with the main insulating layer (1).

4. An overhead insulated cable according to claim 1, characterized in that, The reinforcing steel rope (5) is configured as multiple ropes, and the multiple reinforcing steel ropes (5) are arranged at equal intervals around the axis of the rotating ring (421).

5. An overhead insulated cable according to claim 1, characterized in that, The main insulation layer (1) is provided with a detection cable (8), which is set parallel to the conductor core (2). One end of the detection cable (8) is connected to the rotating ring (421), and the other end of the detection cable (8) is connected to the fixed ring (41).

6. An overhead insulated cable according to claim 5, characterized in that, The fixing ring (41) has a detection groove (412) inside, and one end of the detection cable (8) is fixedly connected to the detection groove (412).

7. An overhead insulated cable according to claim 6, characterized in that, A rubber plug (9) is threaded onto the opening of the detection groove (412).

8. An overhead insulated cable according to claim 7, characterized in that, A limiting spring (10) is fixedly connected to the end face of the fixing ring (41). The end of the limiting spring (10) away from the fixing ring (41) is provided with a mounting plate (101), and the mounting plate (101) is fixed on the detection cable (8).

9. An overhead insulated cable according to claim 1, characterized in that, The conductor core shielding layer (3) is made of cross-linked or non-cross-linked semi-conductive material.

10. An overhead insulated cable according to claim 3, characterized in that, Both the main insulation layer (1) and the raised insulation layer (7) are made of black cross-linked polyethylene insulation material for overhead insulated cables.

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