JPS6036601Y2 - Dross detection device - Google Patents

Description

[Detailed description of the invention] The present invention detects dross or foreign matter deposits (hereinafter referred to as dross) on plated strip steel sheets (hereinafter referred to as strip) generated in a continuous melt plating line during continuous operation, and prevents a decrease in production efficiency and The present invention relates to a dross detection device for preventing a decrease in yield.

Conventionally, the dross generated on the strip surface in the continuous melt plating line was monitored with the naked eye, communicated to the downstream process,
In order to prevent accidents such as roll flaws and strip breakage due to the dross, workers in the downstream process had to perform processes such as opening the rolls in advance.

It was extremely difficult to eliminate the above-mentioned accidents because dross was overlooked and discovered late due to visual observation.

Therefore, accurately detecting dross during continuous operation is extremely useful for improving production efficiency and yield by reducing accidents such as roll defects and strip breakage, and countermeasures have been desired.

The present invention was devised in view of these points, and its feature is that in a continuous hot-dip plating line, a detection end formed from a plated strip steel plate with an appropriate interval is attached to a rotating shaft via a support frame, and the strip A dross detection device is characterized in that it detects rotational movement when dross attached to a steel plate contacts a detection end and rotates the detection end.

An embodiment of the present invention will be described in detail below with reference to the drawings.

First, FIG. 1 shows the outline of the continuous hot-dip plating line after the hot-dip plating bot P of this embodiment and the installation location of the dross detection device C.

By the way, P is the hot-dip plating pot, L is the louver device system, R is the deflector roll, C is the installation location of the dross detection device of this example, Sc is the quality adjustment device system, SR is the roll (for quality adjustment), and Wr is the work. The floor, H is the support.

In FIGS. 2 and 3, R is a deflector roll, and a plated strip steel plate S is wound around and passed through the deflector roll R.

The support frame 2 is placed close to the strip S that is wound around the deflector roll R and is passed through the support frame 2 at an appropriate distance from the strip S.
The detection end 1 provided at one end of the is positioned.

This detection end 1 is a rod-shaped member extending parallel to the width direction of the strip S, and has a length sufficient to cover the width of the strip S.

The support frame 2 is supported by a rotating shaft 3, and the rotating shaft 3 is attached to a movable bearing 4 via a slide plate 9.

Adjustment bolts are attached to the bearings 4 on the slide plate 9 so that the distance between the detection end 1 and the strip S wound around the deflector roll R can be adjusted by moving the position of the rotating shaft 3, that is, the bearing 4. 5, and an adjustment handle 6 is attached to the adjustment bolt 5.

Further, the slide plate 9 is attached to a support 10 attached to a column H near the device system.

When dross D is attached to the plated strip steel plate S, the collision of the dross D against the detection end 1 applies rotational force to the rotating shaft 3 via the support frame 2.

The detection end 1 detects the dross D and the rotational force is applied to the rotating shaft 3. Signal processing to the alarm transmitting device Ao is performed by a striker 7 attached to one end of the rotating shaft 3 as shown in FIG. When the detection end 1 detects the dross D, the rotational force applied via the support frame 2 to the rotation shaft 3 acts on the alarm issuing switch 8 installed near the device system.

FIG. 4 shows the alarm transmitting device A after acting on the switch 8.

The circuit is designed to take alarm measures such as warning lights AL and alarm bells AB, and also decelerates the line by deceleration signal A, giving the operator time to take accident countermeasures.

Next, the effects of the embodiment will be described.

As shown in FIG. 5, there is a clear difference in roll SR defects, strip breakage, and other accidents, as well as yield loss (indicated by defective rejection weight Y) before and after implementation B and M of this example. Alarm transmitting device A installed with the dross detection device of the present invention.

It has been recognized that signal processing has greatly contributed to improving production efficiency and yield by reducing accidents.

In this case, the vertical axis Y is the weight of defective products (yield decrease), and ts is the number of accidents such as roll SR defects and strip breakage.

The horizontal axis B is the conventional dross detection method (average value over 6 months), and M is the monthly trend after the installation of the dross detection device of this embodiment.

In addition, in this example, the detection location was set on the deflector roll R, but this is to prevent malfunction of the detection end due to defective shape, and it may also be a location where tension is applied to reduce the defective shape, for example. , the same effect as the above embodiment is achieved.

Also, alarm transmitting device A.

In addition to the deceleration signal A, it is also possible to rapidly open and close the roll S3 by using a timer synchronized with the line speed.

As described above, according to the present invention, the plated strip steel sheets S and dross D generated in the continuous melt plating line can be accurately detected during continuous operation, and the dross is useful for preventing a decrease in production efficiency and yield. A detection device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the equipment after the hot-dip plating pot of a continuous molten plating line according to an embodiment of the present invention and the installation location of the dross detection device, and Fig. 2 is an overall perspective view of the dross detection device according to an embodiment of the present invention. 3 is a side view of the same as above, FIG. 4 is a schematic diagram of the alarm transmitting system after dross is detected by the dross detection device of the embodiment, and FIG. 5 is a chart showing the effects of the embodiment. . 1 is a detection end, 2 is a support frame, 3 is a rotating shaft, 4 is a bearing, 5 is an adjustment bolt, 6 is an adjustment handle, 7 is a striker 18
is a switch for alarm transmission, 9 is a slide plate, 10 is a support, S is a plated strip steel plate, D is a dross, and H is a support.

Claims (1)

[Scope of utility model registration request] In a continuous hot-melt plating line, a detection end formed from a plated strip steel plate with an appropriate spacing is attached to a rotating shaft via a support frame, and the dross attached to the strip steel plate comes into contact with the detection end, causing the detection end to rotate. A dross detection device characterized by detecting rotational movement when the dross is moved.