Large slab flame spray gun cutting height control system and its application method

Abstract

The invention relates to a plate slab flame spray gun cutting height control system which comprises a cutting machine rail, a flame cutting machine, a flame cutting trolley, a spray gun, a pneumatic cylinder, a camera and a process control system, wherein the flame cutting trolley is arranged on the flame cutting machine; the pneumatic cylinder is mounted on the flame cutting trolley; and the camera is used for shooting the spray gun and spray gun flame. The system using method comprises the following steps: acquiring a distance from a nozzle of the flame spray gun to a point with the highest flame temperature in real time by utilizing the camera; comparing the acquired distance with a vertical distance from the nozzle of the flame spray gun to a midpoint position of a casting blank in a thickness direction; and according to a comparison result, by a computer, controlling the piston type flame spray gun to move up and down to carry out regulation so as to guarantee that the distance between the nozzle of the flame spray gun and the point with the highest flame temperature is equal to the vertical distance between the nozzle of the flame spray gun and the midpoint position of the casting blank in the thickness direction in real time and to guarantee that a high-temperature part of the outer flame of the flame spray gun is sufficiently utilized to heat a slab, thereby fulfilling the aims of promoting plate slab cutting quality and stabilizing the continuous casting production rhythm, and greatly reducing labor intensity of field personnel.

Description

Technical field [0001] The invention provides a large slab flame spray gun cutting height control system and a use method thereof, belonging to the technical field of continuous casting production control. Background technique [0002] At present, flame cutting is the only economical and effective way to cut large slabs with a thickness of 60mm or more in the continuous casting production process. The key to effective flame cutting technology is to ensure that the metal near the slab cut can be quickly heated to the ignition point of steel, which is closely related to the temperature distribution of the gas flame. The flame is divided into three parts: outer flame, inner flame, and flame core. The temperature of the outer flame is affected by whether the combustion material can be fully oxidized. Temperature of inner flame> The temperature of the flame core, therefore, in the process of flame cutting, if the high temperature area of ​​the outer flame can be fully utilized to h...

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Problems solved by technology

But this method has the following disadvantages: (1), the cutting height of the flame spray gun obtained by manual adjustment can only roughly achieve the purpose of heating the slab metal with the outer flame of the gas flame, but cannot be accurately realized; (2) ), affected by external factors such as the supply pressure and purity of gas fuel, the length of the outer flame of the gas flame will often change during the production process, and the traditional manual adjustment method cannot adjust the cutting of the flame spray gun in time according to the change of the outer flame length of the flame height, thus affecting the actual cutting effect of the slab; (3), in the traditional way, the on-site staff needs to adjust the cutting height of the flame spray gun according to the flame cutting effect of the previous pouring before each pouring production, Therefore, the labor intensity is high

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