A cable high thermal conductivity backfill material

Abstract

The invention discloses a cable high-thermal-conductivity backfilling material which comprises slag stone, calcium oxide, polyvinyl acetate adhesive, water and sodium silicate. The cable high-thermal-conductivity backfilling material is proportionally prepared from the slag stone, calcium oxide, polyvinyl acetate adhesive, water and sodium silicate by a special technique. The cable high-thermal-conductivity backfilling material has the technical characteristics of favorable initial flowability, moderate alkalinity, low bleeding rate and the like before solidifying. After solidifying, the cable high-thermal-conductivity backfilling material has the advantages of high water content, high stability, smaller thermal resistance ratio than soil, favorable heat dissipation property and higher hardness, and can keep the periphery of the cable at lower thermal resistance for a long time, thereby enhancing the current capacity of the cable or lowering the working temperature of the cable conductor. Compared with the cable with the same specification in the prior art, the current capacity is increased by 15-28%, thereby greatly lowering the project investment cost. The cable using the backfilling material has the advantages of low thermal resistance, environment friendliness, no harm or toxicity and long service life, and can protect the filling medium.

Description

Technical field: [0001] The invention relates to a filler used for cable construction, in particular to a cable high thermal conductivity backfill material used for laying 10kV power cable pipes. Background technique: [0002] Many experts and technicians have been working hard for the safe operation of the cable since the cable was established. In order to increase the current carrying capacity and reduce the local heating bottleneck during laying, anion water cooling, gas cooling, and insulating oil have been developed on cable products. Cooling and other products, but because of the high cost and complicated construction technology, the development of the power system is slow, and the electricity consumption is quite tight, which hinders the rapid development of the national economy and the improvement of people's living standards. [0003] The choice of cable ampacity is related to the safe operation of the power grid and is related to the safety and reliability of power...

AI Technical Summary

Problems solved by technology

At present, some even use 4×5 row pipes for laying, the amount of cables increases, and the heat sources also increase. However, there are generally no heat-conducting materials in the pipes, and only the heat conduction of the air is closed. Because the heat conductivity of the air is very low, this further promotes the heat dissipation of the cables. The heat is difficult to dissipate, which reduces the allowable current carrying capacity of the cable to a greater extent

[0005] At present, there are some cable fillers on the market, but the thermal conductivity of these cable fillers is not particularly good and cannot meet the demand

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