On-site repairing device and method of converter supporting ring trunnions

Abstract

The invention discloses an on-site repairing device and method of converter supporting ring trunnions. The repairing device comprises a fixing shaft, a driving end plate, a driven end plate and a connecting rod, wherein the driving end plate, the driven end plate and the connecting rod can rotate around the fixing shaft, and a machining part is arranged between the driving end plate and the drivenend plate to machine the trunnions. The repairing method comprises the steps of rotating the driving end plate and the driven end plate to drive the machining part to machine the trunnions and controlling the position of a turning tool support to carry out machining on the trunnions at different length positions. According to the on-site repairing device and method of the converter supporting ring trunnions, rotary machining and repairing on the converter support ring trunnions in the field can be carried out, so that the repairing speed and precision is improved, and the cost of a steelmaking plant is reduced.

Description

technical field [0001] The invention relates to the technical field of design and processing equipment, in particular to an on-site repair device and method for the trunnion of a converter support ring. Background technique [0002] The converter is a kind of steelmaking furnace. It generally refers to a mesh-shaped oxygen-blowing container that can be dumped. The active end is connected to a tilting reducer to make the converter rotate. The designed tonnage of the converter is generally 50 tons, 80 tons, 120 tons, 160 tons, 180 tons, etc. The converter is the main equipment in the steelmaking plant. During the production process, due to the harsh working environment, it needs to bear the weight of several hundred tons and is in a high temperature environment. The converter has high requirements on the concentricity of the trunnion. Once the wear exceeds a certain level, it will affect the normal production of the equipment, especially the transmission part. Once the gap be...

AI Technical Summary

Problems solved by technology

The converter is the main equipment in the steelmaking plant. During the production process, due to the harsh working environment, it needs to bear the weight of several hundred tons and is in a high temperature environment. The converter has high requirements on the concentricity of the trunnion. Once the wear exceeds a certain level, it will affect the normal production of the equipment, especially the transmission part. Once the gap between the inner hole of the transmission gear and the trunnion is too large, it will slip and cannot be smelted. Good molten steel is poured out, affecting production, and it must be replaced at this time

The converter trunnion and the supporting ring of the converter are connected together by welding. The supporting ring is a cylindrical member with a diameter of more than five meters and a weight of more than 50 tons. The two ends of the trunnion are welded on both sides of the supporting ring. When the bearing position of the trunnion or the fixed position of the gear is worn, due to the huge volume of the workpiece, it needs to be processed by a lathe with a turning diameter of more than 5 meters, and because it cannot be transported over a long distance, it can only be manually polished after partial repair welding Carry out simple repairs, but manual grinding often cannot guarantee dimensional accuracy, so this method can only be used as an emergency treatment to ensure temporary production, and cannot fundamentally solve the problem

Once the wear is too large, the entire support ring can only be scrapped and must be replaced with a new support ring

Due to the large volume of the support ring, the price is expensive, and the production cycle is also long, the overall replacement will put a lot of pressure on the production and cost of the steelmaking plant

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