Overhead semi-insulated cable
By designing an overhead semi-insulated cable with exposed conductors and a specially structured insulation sleeve, the problems of safety and low current carrying capacity of overhead cables are solved, achieving efficient heat dissipation and stable operation.
Patent Information
- Application Number
- CN202423261118.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing overhead cables have problems with poor safety performance and low current carrying capacity, and exposed cables perform poorly in extreme weather conditions.
Design an overhead semi-insulated cable with exposed conductors and a thermosetting plastic sheath. The longitudinal opening has V-shaped side walls with a central angle of 90 degrees to enhance insulation performance and accelerate heat dissipation.
It improves the safety and current carrying capacity of overhead cables, while reducing costs, minimizing Karman vortex street oscillations in the wind, and stabilizing cable operation.
Smart Images
Figure CN223728488U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electric wire and cable, especially an overhead semi-insulated cable. BACKGROUND
[0002] There are two kinds of overhead cables, one is an overhead line with an outer insulation layer, and the other is an overhead bare stranded wire; the overhead line with an insulation layer has a safe insulation layer, but its heat dissipation capacity is slightly poor, and the current-carrying capacity of the cable is low; the overhead bare stranded wire has a high current-carrying capacity and a small cost investment, but has poor safety performance, and the poor safety performance includes the influence of short circuit on the operation of the power grid and the electric shock damage to other people and objects, and the overhead bare stranded wire also has poor ability to cope with extreme weather. SUMMARY
[0003] The utility model solves the technical problem that a kind of overhead semi-insulated cable can improve the safety performance and current-carrying capacity comprehensive performance of overhead cable, and reduce the investment of overhead insulated cable.
[0004] The utility model adopts the technical scheme that a kind of overhead semi-insulated cable has conductor and the insulation sleeve located in the conductor outer, the insulation sleeve has longitudinal opening to make the part of conductor be bare, on the cross section of the cable, the included angle of the bare part of conductor is 30-150 degrees.
[0005] Specifically, the included angle of the bare part of conductor is 90 degrees.
[0006] Specifically, to make the insulation sleeve with opening not easy to separate from conductor, the insulation sleeve is thermosetting plastic sleeve.
[0007] Specifically, the two side walls of longitudinal opening are in the shape of splayed eight.
[0008] Specifically, the two side walls of longitudinal opening are parallel.
[0009] The utility model has the advantages that the overhead semi-insulated cable of the utility model adopts the insulation sleeve with notch extruded, part of conductor is exposed in air, and the overhead laying can maintain insulation performance and accelerate the circulation of air on conductor, so as to take away a large amount of heat, improve the current-carrying capacity of overhead line, reduce the investment cost of power transmission project while improving the safety of overhead cable; the exposed heat dissipation groove can be spanned between two iron towers in the shape of spiral when installing, and the setting can reduce the card door vortex street oscillation of overhead line in wind, and the airflow is scraped along the spiral line from the gap of groove type, and centripetal force is formed, so as to play a role of stabilizing electric wire. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is the cross section schematic view of the first structure of the utility model;
[0011] Figure 2 is the cross section schematic view of the second structure of the utility model;
[0012] Figure 3 is the cross section schematic view of the two overhead lines fixed end of the cable of the first structure of the utility model;
[0013] Figure 4 is the cross section schematic view of the middle of the two overhead lines of the cable of the first structure of the utility model.
[0014] In the drawing: 1, conductor, 2, insulating sleeve, 2-1, longitudinal opening. DETAILED DESCRIPTION
[0015] The technical scheme in the embodiment of the utility model is described in detail below in combination with the drawings of the utility model specification.
[0016] As shown in the drawing, the overhead semi-insulated cable of the first structure has a conductor 1 and an insulating sleeve 2 outside the conductor 1, the insulating sleeve 2 has a longitudinal opening 2-1 to make a part of the conductor 1 in a bare state, on the cross section of the cable, the included angle α of the conductor 1 bare part is 90 degrees, from the safety and heat dissipation two aspects, the included angle α of 90 degrees is more appropriate, if the α is less than 90 degrees, it is to give priority to considering the safety of the cable, if the α is greater than 90 degrees, it is to give priority to considering the heat dissipation of the cable, the two side walls of the longitudinal opening 2-1 are in a big mouth outward eight character shape, and the insulating sleeve 2 is a thermosetting plastic sleeve. Figure 1 As shown in the drawing, the overhead semi-insulated cable of the first structure has a conductor 1 and an insulating sleeve 2 outside the conductor 1, the insulating sleeve 2 has a longitudinal opening 2-1 to make a part of the conductor 1 in a bare state, on the cross section of the cable, the included angle α of the conductor 1 bare part is 90 degrees, from the safety and heat dissipation two aspects, the included angle α of 90 degrees is more appropriate, if the α is less than 90 degrees, it is to give priority to considering the safety of the cable, if the α is greater than 90 degrees, it is to give priority to considering the heat dissipation of the cable, the two side walls of the longitudinal opening 2-1 are in a big mouth outward eight character shape, and the insulating sleeve 2 is a thermosetting plastic sleeve.
[0017] Figure 2 As shown in the drawing, the overhead semi-insulated cable of the first structure has a conductor 1 and an insulating sleeve 2 outside the conductor 1, the insulating sleeve 2 has a longitudinal opening 2-1 to make a part of the conductor 1 in a bare state, on the cross section of the cable, the included angle α of the conductor 1 bare part is 90 degrees, from the safety and heat dissipation two aspects, the included angle α of 90 degrees is more appropriate, if the α is less than 90 degrees, it is to give priority to considering the safety of the cable, if the α is greater than 90 degrees, it is to give priority to considering the heat dissipation of the cable, the two side walls of the longitudinal opening 2-1 are in a big mouth outward eight character shape, and the insulating sleeve 2 is a thermosetting plastic sleeve.
[0018] As shown in the drawing, the overhead semi-insulated cable of the first structure has a conductor 1 and an insulating sleeve 2 outside the conductor 1, the insulating sleeve 2 has a longitudinal opening 2-1 to make a part of the conductor 1 in a bare state, on the cross section of the cable, the included angle α of the conductor 1 bare part is 90 degrees, from the safety and heat dissipation two aspects, the included angle α of 90 degrees is more appropriate, if the α is less than 90 degrees, it is to give priority to considering the safety of the cable, if the α is greater than 90 degrees, it is to give priority to considering the heat dissipation of the cable, the two side walls of the longitudinal opening 2-1 are in a big mouth outward eight character shape, and the insulating sleeve 2 is a thermosetting plastic sleeve. Figure 3 4 As shown in the drawing, the overhead semi-insulated cable of the first structure has a conductor 1 and an insulating sleeve 2 outside the conductor 1, the insulating sleeve 2 has a longitudinal opening 2-1 to make a part of the conductor 1 in a bare state, on the cross section of the cable, the included angle α of the conductor 1 bare part is 90 degrees, from the safety and heat dissipation two aspects, the included angle α of 90 degrees is more appropriate, if the α is less than 90 degrees, it is to give priority to considering the safety of the cable, if the α is greater than 90 degrees, it is to give priority to considering the heat dissipation of the cable, the two side walls of the longitudinal opening 2-1 are in a big mouth outward eight character shape, and the insulating sleeve 2 is a thermosetting plastic sleeve. Figure 3 Figure 4 As shown in the drawing, the overhead semi-insulated cable of the first structure has a conductor 1 and an insulating sleeve 2 outside the conductor 1, the insulating sleeve 2 has a longitudinal opening 2-1 to make a part of the conductor 1 in a bare state, on the cross section of the cable, the included angle α of the conductor 1 bare part is 90 degrees, from the safety and heat dissipation two aspects, the included angle α of 90 degrees is more appropriate, if the α is less than 90 degrees, it is to give priority to considering the safety of the cable, if the α is greater than 90 degrees, it is to give priority to considering the heat dissipation of the cable, the two side walls of the longitudinal opening 2-1 are in a big mouth outward eight character shape, and the insulating sleeve 2 is a thermosetting plastic sleeve.
[0019] The principle and implementation mode of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the present application. In conclusion, the content of the present application should not be understood as the limitation of the present application.
Claims
1. An overhead semi-insulated cable having a conductor (1) and an insulating jacket (2) located outside the conductor (1), characterized in that: The insulating sleeve (2) has a longitudinal opening (2-1) to expose a part of the conductor (1), and the exposed part of the conductor (1) has a central angle of 30-150 degrees in the cross section of the cable.
2. An overhead cable according to claim 1, characterised in that: The exposed part of the conductor (1) has a central angle of 90 degrees in the cross section of the cable.
3. An overhead cable according to claim 1, characterised in that: The insulating sleeve (2) is a thermosetting plastic sleeve.
4. An overhead cable according to claim 1, characterised in that: The two side walls of the longitudinal opening (2-1) are splayed outward.
5. An overhead cable according to claim 1, characterised in that: The two side walls of the longitudinal opening (2-1) are parallel.