JPH0744358Y2 - Liquid level monitoring device in twin roll type continuous casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a twin roll type continuous casting machine which is installed in parallel.
The present invention relates to a melt level monitoring device in a twin roll type continuous casting machine that monitors whether or not the height of the melt level supplied between two rolls is appropriate.

[Prior Art] An example of a conventional melt level monitoring device in a twin roll type continuous casting machine will be described with reference to FIG. 3, where 1,1 are two rolls arranged horizontally and in parallel. A core 2 is inserted in parallel with the rolls 1,1 above the space between the rolls 1,1. A plurality of molten metal injection ports 3 are formed on the upper surface of the core 2, and a plurality of molten metal ejection ports 4 communicating with the molten metal injection port 3 are formed on both side surfaces of the core 2. The molten metal 5 is supplied from the molten metal injection port 3 through the molten metal jet 4 to the space between the upper portions of the rolls 1, 1. Side dams 6 and 6 are provided between the upper ends of the rolls 1 and 1 so as to contact both end faces of the rolls 1 and 1, so that the molten metal 5 does not leak in the axial direction of the rolls 1 and 1. .

The rolls 1 and 1 are rotating while being cooled by water or the like, and the molten metal 5 supplied to the upper part between the rolls 1 and 1 and the part surrounded by the side dams 6 and 6 is The solidified shell is cooled on the surface, and the solidified shell grows while passing downward between the rolls 1 and 1 to form an unsolidified slab 7,
It is taken out continuously from between 1.

If the level of the molten metal 5 supplied between the rolls 1 and 1 is not maintained at a constant level, the head pressure of the molten metal 5 when passing between the rolls 1 and 1 will fluctuate. The thickness of the slab 7 becomes uneven.

Therefore, a camera 8 for monitoring the molten metal surface is provided toward the side weir 6 as indicated by a chain line to monitor the height of the molten metal surface at the boundary between the side weir 6 and the molten metal 5.

[Problems to be Solved by the Invention] The molten metal 5 may solidify and the casting shell 9 may adhere to the boundary portion between the side dam 6 and the molten metal surface.
In order to prevent the molten metal from adhering to the core 2, the molten metal 5 flowing out from the molten metal jet 4 at the end of the core 2 is poured into the side dam 6.

Therefore, the boundary between the side dam 6 and the surface of the molten metal 5 is the core 2
Since the molten metal 5 poured from above was undulating, the conventional apparatus for monitoring this portion could not know the exact height of the molten metal surface.

An object of the present invention is to provide a molten metal level monitoring device for a twin roll type continuous casting machine, which enables the molten metal level monitoring camera to accurately know the molten metal level.

[Means for Solving the Problems] The molten metal level monitoring device in the twin roll type continuous casting machine of the present invention is a twin roll type continuous casting in which a core having a molten metal jet is provided between two rolls arranged in parallel. In the machine, a ridge extending in the vertical direction of the molten metal surface along the core is provided at a position avoiding the molten metal jet of the core, and a molten metal surface monitoring camera is arranged toward the ridge. It is a thing.

[Operation] Since there is no ripple of the molten metal at the boundary between the ridge and the molten metal surface, it is possible to know the exact height of the molten metal surface by the camera for monitoring the molten metal surface.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an essential part of an embodiment of the present invention, and FIG. 2 is an overall side view of FIG. 1, in which the same parts as in FIG.

A protrusion 10 is provided along the core 2 in a vertical direction of the molten metal surface at a position avoiding the molten metal spout 4 of the core 2, that is, on the side surface of the core 2 which is the middle of the molten metal spouts 4, 4. .

Since the boundary portion 11 between the ridge 10 and the molten metal surface is not affected by the swelling caused by the molten metal 5, the boundary portion 11 between the ridge 10 and the molten metal 5 is clearly shown, and the height of the molten metal surface is indicated by the camera 8 for monitoring the molten metal surface. Can be monitored accurately.

[Advantages of the Invention] In the present invention, the height of the molten metal surface is monitored by pointing the molten metal surface monitoring camera to the ridge provided at a position avoiding the molten metal gas ejection port. It is possible to obtain an excellent effect that the height of the molten metal surface can be accurately monitored without being affected by the waviness of the molten metal surface flowing out.

[Brief description of drawings]

FIG. 1 is a perspective view showing an essential part of an embodiment of the present invention, FIG. 2 is an overall side view of FIG. 1, and FIG. 3 is a partial perspective view of a conventional device. In the figure, 1 is a roll, 2 is a core, 4 is a molten metal ejection port, 5 is a molten metal, 8 is a camera for surface monitoring, and 10 is a ridge.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisahiko Fukase 1 Shin-Nakahara-machi, Isogo-ku, Yokohama Haramachi No. 1 Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Second Factory (56) References JP 62-173057 (JP, A) Jikkouhei 3-41879 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A twin roll type continuous casting machine having a core having a molten metal spout between two rolls arranged in parallel, at a position avoiding the molten metal spout of the core along the core. A molten metal level monitoring device in a twin roll type continuous casting machine, comprising: a ridge extending in the vertical direction of the molten metal level;