Process for repairing mouth fracture of substation isolating-switch locking pins

Abstract

The invention discloses a process for repairing mouth fracture of substation isolating-switch locking pins. After two molds made of clay bricks are fixed on a repair-needing part, filling-type electric welding is performed by use of a DC welder and a cast-iron welding rod, and then a treatment process of polishing a repaired surface is completed. The process comprises the following steps: clearingfouling, sand, water, rust and other dirt on a welded part on the fracture surface of the mouth of an isolating-switch locking pin; performing beveling and other preparation measures on the fracturepart of the mouth of the isolating-switch locking pin; performing 45-degree beveling treatment on a defect part; fixing the clay-brick molds, namely gap parts in the two molds; performing filling-typeelectric welding by use of the DC welder and the cast-iron welding rod; taking out the clay-brick molds out; and polishing a molded surface. An on-site repairing technique implemented on the basis of the prior fracture surface has the characteristics of convenient operation, low cost and strong practicability.

Description

technical field [0001] The invention relates to a technology for repairing the shape of a cast iron arc surface, and further relates to a technology for repairing a severe fracture of a locking pin opening of an isolating switch in a substation. Background technique [0002] At present, there are mainly the following methods to deal with the fracture of the lock pin of the isolating switch of the substation: [0003] 1. Overall replacement: the cost is high and the work requires a power outage. After the replacement, it is necessary to carry out corresponding anti-rust and painting work on the newly replaced part, which requires a long working time and low economic benefits. [0004] 2. Use foreign objects to fix: After each operation of the isolating switch, use copper wire or other materials to fix it. This method can only be used as a temporary measure. The disadvantage is that it is safe and increases Reduced the burden of substation operators switching operations. [...

AI Technical Summary

Problems solved by technology

[0003] 1. Overall replacement: the cost is high and the work requires a power outage. After the replacement, corresponding rust prevention and painting work is required for the newly replaced part, which requires a long working time and low economic benefits

[0004] 2. Use foreign objects to fix: After each operation of the isolating switch, use copper wire or other materials to fix it. This method can only be used as a temporary measure. The disadvantage is that it is safe and increases Reduced the burden of substation operators switching operations

Such as the filling of casting defects such as air holes, shrinkage cavities, sand holes, cracks, etc., and the repair of bearing seat grinding, parts size out of tolerance, and rust repair.

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