JPS6080582A - Method of lifting and driving suction head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for driving a suction head up and down in a vacuum suction type sludge removal system.

The above system uses slag (slag) generated during melting work of metals, etc.
is sucked up and removed by the suction power of a suction device without manual intervention. The suction head is connected to a cooling/suction device, and during operation, the tip of the suction head (suction port) vacuum-suctions the molten slag on the molten metal while controlling its position so that it does not come within a certain distance from the slag surface. The sucked slag is immediately cooled by jet water and becomes sand-like.
It is pneumatically transported through a suction tube.

FIG. 1 shows the conventional device. (1) is the molten metal tank, (2)
Suction head of vacuum suction type slag removal system, (3)
(4) is a transport pipe connecting the suction head (2) and a vacuum pump (not shown), (4) is a lifting/rotating drive device for the suction head (2), and an electrode (5) attached to the suction head (2). The suction port (6) and slag (7)
) is driven so that the distance between them does not fall below a certain value. (8
) is an image 7 eye path scope whose one end extends near the suction head (2), and the suction head (2) side is disposed in a cooling cylinder (9) cooled with N2.

The ITV connected to the other end of the image fiber scope (8) is observing the state of the suction port (6) of the suction head (2) through the image 7 eye path scope (8).αυ (2) represents the coaxial cable that transmits the ITVαQ television signal onto the control panel's monitor TV @. (2) represents the jet water for cooling and the granular slag formed by cooling with this jet water. (G) represents the molten metal. It is.

Conventionally, the position of the suction head (2) was adjusted using the electrode (5).
However, if the electrode (5) is left immersed in the molten slag (7), the tip of the electrode (5) will melt and disappear. (5) The electrode lifting device (14) that lifts and lowers the electrode (
This is necessary in addition to 5). Also, like this, the electrode (5)
In order to raise and lower the suction head (2), the conventional raising and lowering driving method has the disadvantage that it is necessary to continuously detect the position of the suction head (2).

Therefore, the present invention focuses on the suction port of the suction head.
A suction head lifting and lowering method that processes ITV television signals to continuously detect the distance between the slag surface and the suction head, and eliminates the need for conventional position detection electrodes and electrode lifting devices. The purpose is to provide.

The method for driving the suction head up and down according to the present invention is to irradiate the detection light toward the slag surface, and pass the original image of the detection light through an image fiber/<-7'=cope whose one end on the incident side moves up and down together with the suction head. capturing an image of the reflected light by a television camera, identifying the position of the reflected light from this television signal and calculating the distance between the suction head and the original image,
The system is characterized in that the vertical movement of the suction head is controlled based on the calculation and output results.

Hereinafter, a specific example of the elevating drive method of the present invention will be described as a second example.
This will be explained based on FIGS. Qe is a cooling cylinder that is fixed to the suction head (2) with a vacuum cylinder, and like the cooling cylinder (9), it is cooled with N2, and a laser beam as a detection light is placed inside the original image (g). Built-in bundle fiber (4) that guides the light α9. Qυ is a holder that fixes the cooling tube (9) for the image fiberscope (8) to the suction head (2) K, and (a) guides the light beam from the molten slag (g) to the end face ■ of the image fiberscope (8). Lens, (C) is a prism that bends the optical path of the light flux from the molten slag (G) to lens ■, B) is a cooling tube (9)
entrance window, (support)) is the image fiberscope (e)
ITV (representing 11 observation fields) via ITV.

FIG. 4 shows a reproduced image of the ITVQI television signal obtained in this manner. Pass / Kundol Fiber (
The bright spot that appears on the original image (G) of the laser beam emitted from E) is observed with higher brightness than the edge surface (C).

゛Also, since the relative positional relationship between the entrance side end face (c) of the image fiberscope (8) and the suction head (2) is constant regardless of the V-bell of the original image (to), the suction head on the reproduced image (2) and in this embodiment, since the position of the exit side end face of the bundle file l<(7) is constant, only the original image (18) is reproduced according to the position of the suction head (2)! Go up and down on the J1 surface. In other words, the suction head (2) is molten 7
), the original picture O barrel rises from the virtual position to the intersecting line position on the playback screen, and the bright spot '' also rises on the playback screen toward the position of the bright spot opening on the drawing.

The television signal of rrvQl thus obtained is processed as follows to determine the position of the suction head (2).

That is, the number of horizontal scanning lines scanned on the reproduced screen is counted sequentially from the beginning of the reproduced image, and the level of the luminance signal of the horizontal scanning line at each time is compared with a reference level to determine whether it is a bright spot or not. The vertical position of the bright spot on the playback screen is calculated from the count value when it is determined to be a bright spot (b), and the position between the suction port (6) of the suction head (2) and the original image is calculated. The elevating/rotating drive device (4) operates so that this distance matches the target set distance.

As explained above, according to the method for driving the suction head up and down according to the present invention, the following effects can be obtained.

0 Since the position of the suction head relative to the original image can be continuously detected without using electrodes, the suction head can be moved to a predetermined height from the original image with high precision.

0 Furthermore, since only ITV signal processing is required, the mechanical configuration is simplified.

0 Since the position of the suction head is detected without using electrodes, stable operation can be expected over a long period of time.

[Brief explanation of the drawing]

Figure 1 is a front view of the main parts of a conventional vacuum suction type slag removal system.
2 to 4 show a specific embodiment of the lifting method of the present invention, FIG. 2 is a partially cutaway front view of the vicinity of the suction head inlet, and FIG. 3 is the X of FIG. -X sectional view, 4th
The figure is an explanatory diagram of a reproduced image. (2)...Suction head, '(6)...Suction port, (7)...Slag, (8)...Image fiber scope, QQ...ITV, Qυ...Coaxial cable ,
(18... Original picture, a... Laser light [detection light], (
e)...bundle fiber, e! 71 [27i'
...Bright spot [reflected light] Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1 Detection light is irradiated toward the slag surface, and the reflected light from the slag surface is imaged by a television camera through an image fiber scope whose one end on the incident side moves up and down together with the suction head, and this television signal is captured by a television camera. A method for driving a suction head up and down, in which a distance between the suction head and the slag surface is calculated by identifying the position of the reflected light, and the up and down movement of the suction head is controlled based on the calculation result.