RH vacuum refining explosion preventing device and control method thereof

Abstract

The invention provides a RH vacuum refining explosion preventing device and a control method thereof. The device comprises a semispherical cover (8), a support frame (7), multiple cylinders, a cylinder reversing valve (96), an electromagnetic reversing valve (85) and an air pipe (83), wherein the semispherical cover (8) adopts a hollow semisphere structure; one end of the air pipe (83) is communicated with the electromagnetic reversing valve (85), and the other end penetrates into a concave surface from a convex surface of the semispherical cover (8); and one end of the cylinder reversing valve (96) is communicated with the cylinders through a pipeline, and the other end drives piston rods of the cylinders to elongate through communicated compressed air. In the control method of the device, the semispherical cover of the hollow semisphere is pushed by the piston rods of the cylinders to lean against a connecting port of a heat bent pipe; and a mode of conveying and filling such inert gases as nitrogen into the heat bent pipe is adopted to dispel and isolate oxygen and coal gas, being preheated and burnt, to stop a deflagration accident in the heat bent pipe so as to improve the safety and the stability of vacuum refining and smelting production.

Description

technical field [0001] The invention relates to the field of steelmaking machinery, and more specifically relates to an RH vacuum refining explosion-proof device and a control method thereof. Background technique [0002] In the steelmaking production line of metallurgical enterprises, RH vacuum refining furnace is used to smelt the molten steel just off the line from the converter. Through vacuum treatment, the molten steel is in a negative pressure environment, so that the molten steel inclusions and gases are separated and removed, and alloys and other substances can be added for smelting. [0003] refer to Figure 1-4 As shown, during the smelting work, the traversing trolley 3 carrying the vacuum tank 1-1 and the hot bending pipe 1-2 moves to the working position on the platform 4, and the platform 4 is supported by the platform column 5. The vacuum tank 1-1 at the lower part of the traverse trolley 3 is connected to the hot bending tube 1-2 at the upper part, and the ...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of RH vacuum refining explosion-proof device and its control method, in order to solve the technical problem that gas accumulation in the hot bend pipe of RH vacuum refining furnace is easy to cause explosion during preheating, and adopt the device of the present invention , can completely solve the problem of explosion and fire caused by gas accumulation inside the hot bend pipe during preheating, and the control of the device is simple and the cost is low

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