JP-2026075515-A - Ladle heating device

JP2026075515AJP 2026075515 AJP2026075515 AJP 2026075515AJP-2026075515-A

Abstract

[Problem] To provide a ladle heating device that further shortens the ladle heating time and enables more uniform heating of the ladle. [Solution] The ladle heating device 1 includes a heater section 4 having a vertical heater 10. The vertical heater 10 includes a first winding section 31 and a second winding section 32. The first winding section 31 and the second winding section 32 generate heat electrically and can be arranged in a state that extends vertically within the hot water storage space F of the ladle P. The first winding section 31 is located below the first winding section 31 and has a greater heat generation per unit length than the first winding section 31. [Selection Diagram] Figure 1

Inventors

河村和彦
竹内章浩
平田享寛
馬塲康輔

Assignees

中部電力ミライズ株式会社
中部電力株式会社
株式会社ヤマト

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (11)

It is equipped with a heater section that has a vertical heater, The aforementioned vertical heater is equipped with a vertical heating element, The aforementioned vertical heating element generates heat electrically and can be positioned to extend vertically within the hot water storage space of the ladle. A ladle heating device characterized in that the amount of heat generated per unit length in the vertical heating section increases stepwise or continuously as it goes downwards.
It is equipped with a heater section that has a vertical heater, The aforementioned vertical heater is equipped with a vertical heating element, The aforementioned vertical heating element is It generates heat through electricity, It can be positioned in a state that extends vertically within the hot water storage space of the ladle. A ladle heating device characterized by having a first vertical heating element and a second vertical heating element positioned below the first vertical heating element and having a greater heat output per unit length than the first vertical heating element.
It comprises a heater section having a vertical heater with a vertical heating element and a lower heater with a lower heating element. The aforementioned vertical heating element generates heat electrically and can be positioned to extend vertically within the hot water storage space of the ladle. The aforementioned lower heating element generates heat electrically and can be placed within the hot water storage space. A ladle heating device characterized in that the lower heater is held below the vertical heater.
The ladle heating device according to claim 3, characterized in that the amount of heat generated per unit length in the vertical heating section increases stepwise or continuously as it goes downwards.
The ladle heating device according to claim 3, characterized in that the vertical heating section comprises a first vertical heating section and a second vertical heating section located below the first vertical heating section and having a greater heat output per unit length than the first vertical heating section.
The lower heaters are provided in the same number as the vertical heaters. The ladle heating device according to claim 3, characterized in that one lower heater is electrically connected to one vertical heater.
It comprises a heater section having a vertical heater and a fan section having a fan. The aforementioned vertical heater is equipped with a vertical heating element, The aforementioned vertical heating element generates heat electrically and can be positioned to extend vertically within the hot water storage space of the ladle. The ladle heating device is characterized in that the fan generates airflow within the hot water storage space by rotating.
The ladle heating device according to claim 7, characterized in that the fan section has a plurality of fans.
The fan section has a fan cover that surrounds the fan. The aforementioned fan cover is It can be arranged in a state that extends vertically within the hot water storage space, The ladle heating device according to claim 7, characterized in that it has a lower opening at the lower part.
The ladle heating device according to claim 9, characterized in that the fan cover has an upper opening at its upper part.
Multiple vertical heaters are provided. The ladle heating device according to claim 7, characterized in that the fan section is arranged between each of the vertical heaters.

Description

This invention relates to a ladle heating device for heating a ladle. As a ladle heating device, the one described in Japanese Patent Publication No. 2015-213921 (Patent Document 1) is known. This ladle heating device heats the ladle. A ladle has a container-shaped ladle body with a bottom and an open top, and a spout connected to the ladle body. The ladle receives and stores molten metal in its body, and transfers the molten metal to the object to be poured through the spout. In a foundry, the ladle receives molten metal from the melting furnace or pre-furnace, transports the molten metal to the casting site, and either pours the molten metal into a mold or other object, or transfers the molten metal to another ladle or molten metal holding furnace. If the ladle temperature is low, the heat from the molten metal will be absorbed by the ladle, lowering the temperature of the molten metal and leading to a decrease in its quality. Therefore, a ladle heating device is used to preheat and maintain the temperature of the ladle before it receives the molten metal. This ladle heating device comprises a lid that closes the opening of the ladle and an electric resistance heater attached to the lid that heats the inside of the ladle. Three electric resistance heaters are provided, spaced equally apart in the circumferential direction and each extending downward. Japanese Patent Publication No. 2015-213921 This is a schematic cross-sectional view of the ladle heating device and ladle according to the present invention.This is a top view of Figure 1.Figure 1 is a schematic cross-sectional view of the fan section in the ladle heating device. Hereinafter, embodiments of the present invention and modifications thereof will be described with reference to the drawings as appropriate. Furthermore, the present invention is not limited to the following embodiments and modifications. Figure 1 is a schematic cross-sectional view of the ladle heating device 1 and ladle P according to the said configuration. Figure 2 is a top view of Figure 1. The ladle P has a ladle body M and a spout E. The ladle body M has a molten metal storage space F and a bottom B. The molten metal storage space F is open upwards and can store molten metal, i.e., it can store molten metal. The bottom B is the lower wall of the ladle body M and is located below the molten metal storage space F. The outlet E protrudes outward from the ladle body M. The outlet E is cylindrical. The internal space of the outlet E is connected to the molten metal storage space F. For the sake of explanation, the direction in which the outlet E protrudes is assumed to be to the right. Also, the direction of the bottom B when viewed from the molten metal storage space F is assumed to be downward. Furthermore, the direction perpendicular to the plane of Figure 1 towards the viewer is assumed to be the forward direction, and the direction perpendicular to the plane of Figure 1 towards the viewer is assumed to be the backward direction. Various directions may be appropriately changed depending on at least one of the installation and operation conditions of the components or parts. The molten metal may be molten aluminum, molten zinc or other non-ferrous metals, or molten iron or other metals. The ladle heating device 1 comprises a lid 2, a heater 4, a terminal cover 5, and a fan 6. The lid portion 2 is a disc-shaped component made of insulating material. The lid portion 2 is positioned on the upper side of the ladle body M and covers the upper side of the hot water storage space F. Furthermore, the material of the lid 2 is not limited to thermal insulation. Also, the shape of the lid 2 is not limited to a disc shape. The materials and shapes of other components and parts can also be changed in various ways. The heater unit 4 has multiple (three) vertical heaters 10 and multiple (three) lower heaters 12. Since each vertical heater 10 is similar to the others except for its arrangement, unless otherwise specified, only one vertical heater 10 is described. The vertical heater 10 is a radiant heater and includes a coil section 20, a wiring section 22, and an overheating thermocouple 24. However, the vertical heater 10 is not limited to a radiant heater. The coil section 20 includes a core section 30, a first winding section 31 as a first vertical heating section, and a second winding section 32 as a second vertical heating section. The first winding section 31 and the second winding section 32 constitute the vertical heating section. The core 30 is a rod-shaped member made of insulating material, extending vertically. The first winding section 31 is a conductor wound around approximately the upper two-thirds of the core section 30. The second winding section 32 is a conductor wound around approximately the lower one-third of the core section 30. The number of turns per unit length of the conductor in the second winding section 32, i.e., the number of turns density, is greater than the nu