Device for changing cable between 35kV circuit straight rods and construction method

Abstract

The invention discloses a device for changing a cable between 35kV circuit straight rods and a construction method. The device comprises a cable tensioning mechanism, a cable connecting mechanism and an injection molding insulation mechanism. The injection molding insulation mechanism sleeves the cable connecting mechanism. The changing speed is high, the cable is not wasted, a butt joint effect is high, and a connection position is high-temperature-resistant. The device is convenient to use, high in sealing effect, high in insulation performance and high in heat dissipation effect, and resists acid corrosion and alkali corrosion.

Description

technical field [0001] The invention belongs to the technical field of cable replacement equipment for power transmission lines, and in particular relates to a device and a construction method for replacing cables between straight poles of a 35kV line. Background technique [0002] With the rapid development of the electric power industry, the electricity consumption of suburban and new rural construction is increasing, and the original distribution line cables are frequently blown or the distribution line cables are broken due to environmental factors. After the wire clips are connected, insulation tape is used. If the connection effect is poor, it is usually easy to burn again, and the burned section needs to be replaced again. Moreover, the insulation tape has poor corrosion resistance and high temperature resistance. It will age in a month or two, affecting the safety of power supply; usually The method used is to cut off the burnt cable. At this time, the length of the ...

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Problems solved by technology

[0003] The 704 sealant used in the sealing of mineral insulated cable ends and joints currently used also has roughly similar problems, and the specific performance is as follows: 1. The use temperature is not high, and its maximum use temperature is generally lower than 130 ℃, such as 704 sealant. The maximum operating temperature is only 70 0 C, when the temperature is high, it will fail, and even carbonize to make the insulator into a conductor, which will bring harm to the electrical circuit

For mineral insulated cables, the characteristics of fire prevention, explosion protection, large carrying capacity and high temperature resistance are its typical signs. The lack of high temperature resistance of these sealing insulating materials objectively limits the above-mentioned excellent performance of mineral insulated cables; 2. The above-mentioned sealing and insulating materials generally have the problem of long curing time, which affects the construction progress: 3. It is inconvenient to use; the above-mentioned sealing and insulating materials are fluid or semi-fluid before being cured, so when they are filled in the sealed tank of the cable terminal The end of the cable must face up to prevent the sealing and insulating material from flowing out of the terminal sealing tank, otherwise, the effect of sealing and insulation cannot be achieved; 4. The sealing and insulating performance cannot last; the above-mentioned sealing and insulating materials will lose their composition over time. It will change due to natural aging and other reasons, resulting in a decrease in sealing and insulating performance

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