Intelligent heating system for centrifugally casting ultra-long thin-walled slim tubes

Abstract

The invention discloses an auxiliary intelligent heating system which uses clean energy such as natural gas or liquefied petroleum gas and the like on the traditional centrifugal casting equipment. The system comprises a control box, a gas inlet pipe, a fuel gas output pipe, a gas mixing pipe, an ignition system, a fixing seat and riser burners, wherein the two ends of the gas mixing pipe are fixed to the fixing seat; a plurality of riser burners are uniformly distributed on the gas mixing pipe; the gas mixing pipe is connected with the control box by the fuel gas output pipe; the control box is connected with the gas inlet pipe; and the ignition system, an ignition switch, a fuel gas switch and an electric control switch are arranged on the control box. The heating system has the advantages of low heat loss and uniform heating and ensures that the temperature of molten steel maintains constant during centrifugal casting; and by adopting intelligent control, the temperature of the molten steel is prevented from dropping too fast, the requirement of a process molten steel temperature during the centrifugal casting is met, a heat insulating paint, a heat insulating agent and the like are not needed, the efficiency of the centrifugal casting and the quality of products are improved, and the bottleneck problem of process temperature control in the process of casting ultra-long thin-walled slim tubes in domestic industries is radically solved.

Description

technical field [0001] The invention relates to a centrifugal casting technology of an alloy pipe fitting, in particular to a technology for controlling the temperature of an ultra-long thin-walled thin tube in the centrifugal casting process. Background technique [0002] With the rapid development of centrifugal casting technology, in order to improve the casting quality of products, alloy furnace tubes, furnace rolls, radiant tubes, furnace inner rolls and hearth rolls used in petrochemical, metallurgical and nuclear power industries are all made of centrifugal casting technology. For production, the existing centrifugal casting methods are basically the traditional direct casting process, which can basically meet the casting requirements when casting large-diameter thick-walled short tubes, and the casting yield is also high, but in casting general-caliber thin-walled long tubes When casting tubes, the qualified rate of one-time finished products is low, especially when ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of centrifugal casting technology, in order to improve the casting quality of products, alloy furnace tubes, furnace rolls, radiant tubes, furnace inner rolls and hearth rolls used in petrochemical, metallurgical and nuclear power industries are all made of centrifugal casting technology. For production, the existing centrifugal casting methods are basically the traditional direct casting process, which can basically meet the casting requirements when casting large-diameter thick-walled short tubes, and the casting yield is also high, but in casting general-caliber thin-walled long tubes When casting tubes, the qualified rate of one-time finished products is low, especially when casting ultra-long thin tubes, it is difficult to meet the process requirements with the current traditional centrifugal casting equipment, because the centrifugal casting mold is exposed outside, The temperature of molten steel drops too fast, which makes the temperature of molten steel in the mold inconsistent, which affects the crystallization quality of the product. The casting yield is lower and the casting quality is also very poor. In order to prevent the temperature of molten steel from dropping too fast, the manufacturer has adopted thermal insulation coatings, thermal insulation agents, etc., but the effect is not ideal

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