Cable low heat resistance protection medium and preparing method thereof

Abstract

The invention discloses a cable low heat resistance protection medium with high water content, high stability, low heat resistance, environment protection and effective prevention of termite damage, and a preparation method thereof. The filling medium is prepared by mixing bentonite, fine quartz sand, water and cement, and using a small amount of tartaric acid and sodium sesquicarbonate as additives. As accounted by 100% of mass fraction, the filling medium is preferably prepared by 54%-57% of bentonite, 24%-28% of fine quartz sand, 14%-16% of water, 2.5-3.5% of cement, 0.24%-0.26% of tartaric acid and 0.24%-0.26% of sodium sesquicarbonate. Before condensation, the filling medium has the advantages of better initial liquidity, moderate alkalinity, low bleeding rate and the like. After condensation, compared with traditional material, the filling medium has the advantages of high water content and high stability, and enables the surroundings of the cable to maintain low heat resistance for long term, the heat resistance is smaller than that of soil, and the hardness is higher, therefore the current carrying amount of the cable is improved, or the running temperature of the cable conductor is reduced.

Description

Technical field: [0001] The invention relates to a filler for cable construction and a preparation method thereof, in particular to a cable low thermal resistance protection filling medium and a preparation method thereof. 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. In order to prevent termites from damaging cables, chlorosulfonation technology, polymer hard materials and heavy m...

AI Technical Summary

Problems solved by technology

Cause local power transmission bottlenecks in the concrete parts of cables in infrastructure projects such as substations, bridges, and roads. Long-term operation causes the operating temperature of the cables to rise, and the cable insulation materials are affected by high temperatures to accelerate aging and shorten the service life.

High-voltage lines are more likely to cause dielectric loss in these parts, increasing the probability of accidents

[0005] 2. Maintenance is quite difficult

When a cable breaks down and needs to be excavated, it is quite laborious and requires the use of large-scale excavation equipment. At the same time, it is easy to dig out the cables of other adjacent lines, causing greater accidents or losses.

[0007] 3. Vulnerable to termites

[0009] 4. The line operation cost is high

[0010] Cement, yellow sand and water are used as construction materials at the local bottleneck of the cable line. The heat dissipation environment is poor, and the dielectric loss is large, which has a certain impact on the current carrying capacity of the cable in normal operation, and increases the investment cost of the power supply line.

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