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Process steps for anti-corrosion of power fittings
2024-09-27
The hardware used in the power system needs to bear a large tension in order to ensure the normal connection of the line, so the damage of the hardware may cause line failure. 10KV and above high-voltage distribution lines in addition to a small number of cables laid underground, most of the cables are set up in the open air. The cross arm of the iron tower belongs to the above-mentioned power fittings and is used to support the weight of the cable in the line. However, there is only a bottle (or overhang) distance between the high-voltage cable and the earth, and the insulation distance is short. Once the cross arm of the iron tower is exposed in the air and corroded, the safety, stability and continuous operation of the line will be affected. Especially in the industrial developed areas with high acid content in the air, due to acid corrosion, the aging speed of the cross arm of the iron tower will be accelerated, which is easy to produce corona phenomenon and trip accident.
To solve the problem of effective resistance to acid and alkali corrosion of existing fittings, the manufacturing steps of anti-corrosion power fittings are as follows:
1. First remove the dirt on the surface of the power fittings, and then evenly coat a layer of paint on the surface of the power fittings to increase the toughness and flexibility of the fittings;
2. Coat a layer of epoxy resin on the metal fittings, and lay a layer of glass cloth before the layer of epoxy resin solidifies;
3. Two layers of epoxy resin are coated on the surface of the metal fittings laying glass cloth, three layers of epoxy resin are coated after the two layers of epoxy resin are solidified and two layers of glass cloth are laid before the three layers of epoxy resin are solidified, and then four layers of epoxy resin are coated on the two layers of glass cloth. One or more layers of epoxy resin are then applied over the fourth epoxy resin layer. One or more layers of epoxy resin are then applied over the second epoxy resin layer. The anti-corrosion metal fittings include: a flexible layer coated layer by layer on the metal fittings, a layer of coated epoxy resin, a layer of laid glass cloth and a layer of coated epoxy resin. Three layers of epoxy resin coated layer by layer on two layers of epoxy resin, two layers of glass cloth laid and four layers of coated epoxy resin. The anti-corrosion power fittings manufactured by the new method have the advantages of corrosion resistance, good insulation performance, good mechanical load bearing, flexibility and toughness.
