Inner core rod assembly used for continuous casting of large-diameter copper tube

Abstract

Provided is an inner core rod assembly used for continuous casting of a large-diameter copper tube. The inner core rod assembly comprises an inner core rod, a fixing plate and a condenser. The fixing plate is arranged on a copper liquid pouring gate in the bottom of a smelting furnace. The inner core rod is formed in such a manner that a core shaft is arranged in a through hole of a connecting flange in a sleeving mode and fixed between the fixing plate and the condenser by means of the connecting flange. The upper end of the core shaft sequentially penetrates through the connecting flange and the through hole of the center of the fixing plate to be connected with the copper liquid pouring gate in the bottom of the smelting furnace. The lower end of the core shaft stretches into the position between the condenser and the inner wall of the condenser to form a tubular cavity. The core shaft is provided with an inner pouring channel communicated with the copper liquid pouring gate. An inner pouring gate vertical to the inner pouring channel is arranged on the side wall of the inner pouring channel. An opening of the inner pouring gate is arranged above the tubular cavity. A pulling device used for pulling the copper tube in the tubular cavity of the condenser is arranged below the condenser. The inner core rod assembly used for continuous casting of the large-diameter copper tube has following beneficial effects: by means of an improvement on the inner core rod assembly, equipment for continuous casting of the large-diameter copper tube is matched with the inner core rod assembly so that production cost of the large-diameter copper tube is reduced and rate of finished products is increased.

Description

technical field [0001] The invention belongs to equipment in the field of metallurgy, in particular to an inner mandrel assembly for continuous casting of large-diameter copper pipes. Background technique [0002] Copper pipe is used as a profile for pressure processing, and its manufacturing process must go through processes such as smelting, casting, and pressure processing to form a product. However, copper is prone to defects such as looseness, pores, and cracks during casting, and the scrap rate is high. At present, the domestic Copper tubes are produced by pressing copper ingots, especially the pressure processing of large-diameter copper tubes requires large-tonnage extrusion equipment, which requires large investment and high cost. Someone proposed a large-diameter copper pipe continuous casting process, but there was no description of the structure and fixing method of the inner mandrel in the equipment used, which made the process impossible to implement and diffic...

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Problems solved by technology

[0002] Copper pipe is used as a profile for pressure processing, and its manufacturing process must go through processes such as smelting, casting, and pressure processing to form a product. However, copper is prone to defects such as looseness, pores, and cracks during casting, and the scrap rate is high. At present, the domestic Copper tubes are produced by pressing copper ingots, especially the pressure processing of large-diameter copper tubes requires large-tonnage extrusion equipment, which requires large investment and high cost.

Someone proposed a continuous casting process for large-diameter copper pipes, but there was no description of the structure and fixing method of the inner mandrel in the equipment used, which made the process impossible to implement and difficult to promote

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