Intelligent preheating mechanism for steel rail thermit welding

Abstract

The invention discloses an intelligent preheating mechanism for steel rail thermit welding. The intelligent preheating mechanism comprises a positioning clamping unit, an intelligent control system arranged on the positioning clamping unit and a combustion unit connected with the intelligent control system; the intelligent control system comprises a combustor, a control unit for controlling the combustor and a gas pipe connector communicating with the combustor; the combustion unit comprises an air inlet pipe communicating with the combustor, and a combustion nozzle communicating with the other end of the air inlet pipe; and the positioning clamping unit comprises a main support, a steel rail positioning and locking support which is arranged on the main support and used for locking the mechanism on a steel rail, a thermit welding sand mold locking device which is used for locking a thermit welding sand mold on the steel rail and a preheating position adjusting device which is used foradjusting positions of the combustion nozzle. According to the intelligent preheating mechanism, various parameters of the steel rail preheating can be strictly and accurately controlled, various factors easily causing poor preheating in the steel rail thermit welding preheating process are reduced or eliminated, and steel rail preheating effect is improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of rail welding, in particular to an intelligent preheating mechanism for rail aluminothermic welding. 【Background technique】 [0002] At the end of the nineteenth century, with the development of the metallurgical industry and the chemical industry, people invented thermite welding to weld rails. In the early 1960s, my country began to use aluminothermic welding to weld tracks on railways. [0003] The pouring and cooling process of rail aluminothermic welding is very similar to the law of casting, so aluminothermic welding is also called cast welding. In the aluminothermic welding process, the aluminothermic sand mold must be used as a forming mold, and the rail to be welded and the aluminothermic sand mold must be preheated before welding. In the aluminothermic welding construction of rails, preheating of rails and sand molds before welding is an important process, and the preheating effect of rails a...

AI Technical Summary

Problems solved by technology

This method of operation needs to manually adjust the air flow and observe the flame temperature state, which has high requirements for the operator, and at the same time cannot accurately control the preheating temperature

[0006] In the preheating process of rail aluminothermic welding, there are often problems such as inaccurate preheating time, poor adjustment of the flame of the preheating gun, high or low flame temperature, etc., all of which have a negative impact on the preheating effect

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