JPS61179888A - Detector for abnormality of electrode or the like in electrolytic cell for metal - Google Patents

Abstract

PURPOSE:To end an operation for detecting abnormality of multiple electrodes in a short period and to provide lessened manpower and automation by providing an IR camera on electrolytic cell and making possible the analysis of the thermal image of the electrolytic cell. CONSTITUTION:The titled detector consists of a main carriage 5 provided freely movably on the electrolytic cell 1 for metal, the IR camera 6, a means 12 for instructing a photographing position, a reference point 14 for detecting the position of the camera 6 and an analyzing instrument 10 for analyzing the photographed thermal image. The camera 6 is provided on the carriage 5 and photographs the plural electrodes 2, distributors 3, etc. The means 12 is provided alaong one side of the cell 1 and operates the camera 6 at every equal interval.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for detecting abnormal heat generation due to excessive current in electrodes, current supply conductors, etc. of electrolytic refining containers for inkstones. This invention relates to an abnormality detection device mainly used for electrodes, etc. in metal electrolytic tanks.

[Prior art and its problems]

In an electrolytic factory where electrolytic refining is performed, a circuit is constructed of a power supply device (thyristor) conductor, electrodes, etc. When excessive current flows through this circuit, it generates abnormal heat due to Joule loss, and emits infrared rays at a wavelength corresponding to the temperature. The reason why a current larger than the set amount of current flows is mainly because the anode and cathode in the metal electrolytic cell are short-circuited, and the current in the electrolytic cell is concentrated on the short-circuited electrode.

Furthermore, as another cause, when an abnormality occurs in the current distribution in the electrolytic cell due to passivation of the anode, an excessive current is generated in the electrode as a result. Furthermore, heat may be generated due to Joule loss due to increased contact resistance between conductors and between conductors and electrodes.

Since the current caused by the short circuit does not contribute to the electrodeposition of metal, it causes a decrease in production, resulting in an increase in the power source unit and production cost. Power consumption increases due to increased contact resistance and increased electrolytic sliding voltage due to passivation.
The power source unit increases.

By the way, regarding the above-mentioned short circuit, excessive current is detected using a flux meter based on the strength of the magnetic field generated by the direct current. However, this method requires a great deal of labor and cannot be said to be preferable, as it involves holding a flux meter in hand and actually walking over all the electrolytic cells to inspect them. There is also a method of actually measuring the voltage of all electrolytic cells and detecting a short circuit by the voltage drop due to a short circuit.
Only 30% can be captured. Although this voltage measurement is very effective for voltage increases due to passivation, etc., it requires a large number of wiring within the electrolytic factory, and this data must be managed by a computer. This requires high maintenance costs, but this is not commensurate with the above effects.
It's expensive.

Regarding contact resistance, there is a method of measuring the voltage drop by moistening the contact between the electrode and the conductor, but normally, if the contact is thoroughly cleaned, constantly moistening it will not have much effect. Furthermore, the contact resistance of the contacts between conductors gradually increases, and retightening is performed periodically, but in order to confirm the effect, it is difficult to directly measure the voltage drop across the contacts. It was necessary.

Therefore, a device (Japanese Patent Publication No. 57-36983) and a detection method (Japanese Patent Publication No. 57-37671) have been proposed that use an infrared detection device to detect short circuits in electrodes. The former method uses paint to mark electrodes where excessive current is flowing, and the latter method uses signals based on scanning and movement of an infrared thermometer to detect the position of the electrode where the abnormal heat is generated. This is a method of displaying. In both methods, individual electrodes and the like are scanned linearly, so the travel distance of the moving cart is long, and it is necessary to continuously change the angle of the infrared detection device. Therefore, the detection work requires a lot of time, the operation is complicated, and labor saving and automation are difficult.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and it is possible to perform abnormality detection work on a large number of electrodes of a metal electrolytic tank reliably in a short time, thereby achieving significant labor savings in this type of work. The object of the present invention is to provide an abnormality detection device for electrodes, etc. in a metal electrolytic cell, which can detect abnormalities in electrodes, etc. in a metal electrolytic cell.

[Structure of the invention]

The abnormality detection device for electrodes, etc. in a metal electrolytic tank of the present invention has a plurality of electrodes, distributors, etc. arranged in the metal electrolytic tank mounted on a main truck movably installed on top of the metal electrolytic tank. At the same time, an infrared camera is installed to take a two-dimensional downward view w1,
Photographing position indicating means for operating the infrared camera at equal intervals along one side of the metal electrolytic tank are provided at equal intervals, and the position of the infrared camera is detected along the other side of the metal electrolytic tank. A thermal image of the metal electrolytic cell taken by the infrared camera at each predetermined position is analyzed by an analysis device.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention, and reference numeral 1 in the figures indicates a metal electrolytic cell.

As is well known, this gold R electrolytic cell 1 is made up of a large number of electrodes 2 supported within the cell by a distributor 3, which are arranged in an orderly manner vertically and horizontally. Above the metal electrolytic cell (group), two guide rails 4 extend their length in the vertical direction (
In the drawing, they are arranged in parallel in the vertical direction (that is, the Y-axis direction), and support the main bogie (lane for overhead running) 5 so as to be movable in the Y-axis direction. On this main truck 5, an auxiliary truck (traversing truck) 7 equipped with an infrared camera 6 is attached to the main truck 11.
5 so as to be movable laterally along the main truck 5 (left-right direction in the drawing, X-axis direction). The main bogie 5 is provided with a main bogie drive device for moving the main bogie along the guide rail 4, and the auxiliary bogie 7 is provided with an auxiliary bogie drive device for moving the main bogie 5 along the main bogie 5. However, both are omitted in the drawing.

Further, the infrared camera 6 described above is attached with an analysis device M8 for analyzing a thermal image taken by the infrared camera 6. This analysis device 8 includes the infrared camera 6
a video deck 9 that records thermal images photographed by the video deck 9; a thermal image analysis device 10 that analyzes the thermal images recorded on the video deck 9 or directly sent from the infrared camera 6 and displays them on a monitor; It is composed of a printer 11 that prints data sent from the thermal image analysis device 10.

On the other hand, on the guide rail 4 located on one side of the gold kr & electrolytic cell 1, a large number of limit switches (imaging position indicating means) 12 are attached along the guide rail 4. These limit switches 12... each have a second
As shown in the figure, it is attached so as to be located on an extension line of each distributor 3 of the metal electrolytic cell 1. An operating shaft 13 is fixed to an end of the main bogie 5 on the guide rail 4 to sequentially operate the limit switches 12 as the vehicle travels. Here, the position of the operating shaft 13 is such that when the infrared camera 6 on the main truck 5 is located directly above the distributor 3, the limit switch 12 located on the extension line thereof is activated.

On the other hand, the above money j! ! Along the outermost edge of the electrolytic cell 1 in the Y-axis direction, one piece of gold m1! Three reference points 14 are installed at equal intervals per Li decomposition tank. This standard point 1
4 is imaged on the infrared camera 6 to display the position of the photographing zone of the infrared camera 6, in other words, the position of the infrared camera 6 on the X axis. There are no restrictions on the type, shape, installation position, number, etc. of the reference points 14, and any reference point 14 may be used as long as the position can be displayed as a thermal image.

Next, the operation of the abnormality detection device according to the present invention configured as described above will be explained.

First, the infrared camera 6 is installed by the main truck 5 and the auxiliary truck 7.
is located at the detection starting point position (here, for convenience, it is assumed to be the upper right corner in FIG. 1). At this time, the infrared camera 6 projects a reference point 14a that indicates the position in the X-axis direction. Next, the auxiliary truck 7 is left in the same position, and the main truck 5 moves the infrared camera 6 downward in the figure along the Y-axis direction. Then, when the infrared camera 6 is located above the distributor 3 of the first metal electrolytic cell 1, the operating shaft 13 at the end of the main truck 5 operates the first limit switch 12a.

Next, the infrared camera 6 is sent roughly downward in the figure in the Y-axis direction by the main truck 5. Then, when the infrared camera 6 comes to the upper position of the next distributor 3, the operation shaft 13 moves to the next limit switch 12 in the same way.
Activate.

Here, the infrared camera 6 continuously photographs an area approximately 1/3 of the total length of the distributor 3 at a position above each distributor 3, as shown by the dotted line in FIG. .

In the images continuously taken by the infrared camera 6, in parallel, the signals from each limit switch 12 described above do not indicate the position of the infrared camera 6 in the Y-axis direction, but are converted into audio signals etc. and recorded. be done. The images thus sent via the video deck 9 or directly to the thermal image analyzer 10 are sent to the distributor 3 where the signal from the limit switch 12 is recorded.
The upper point is analyzed as stationary 1ris. and,
At the same time, multiple electrodes 2 and 2 were recorded in the above image.
... are displayed in order from the end.

In this way, when the photographing of the first row in the Y-axis direction by the infrared camera 6 is completed, the auxiliary trolley 7 moves in the X-axis direction to the next reference point 14 at the lower end in the figure.
The main stand 115 turns back by starting to move upward in the Y-axis direction. Then, in the same manner, imaging of the second row in the Y-axis direction is sequentially performed. In this way, the infrared camera 6 takes pictures in the Y-axis direction, and when it reaches each reference point 14, it turns back to the next row in order, thereby forming the group of metal electrolytic cells 1 shown in FIG. In this case, all photography was completed in a total of six round trips.

As described above, the thermal image sent from the infrared camera 6 to the video deck 9 is sent to the thermal image analysis device 10, analyzed, and displayed on a monitor as described above. and,
In the image analyzed in parallel with this, for the electrode for which an abnormality was detected, a signal is further sent to the printer 11, which displays the position of the image in the X and Y axis directions and displays the position of the electrode 2 in the image. A number will be printed.

According to such an abnormality detection device, a large number of electrodes 2...
Even in a metal electrolytic cell group consisting of a large number of metal electrolytic cells 1..., abnormality detection work can be carried out efficiently in a very short period of time. Moreover, since these detection results can be displayed as a thermal image, it is not only possible to instantly identify electrodes 2 that are abnormally hot, but also to identify electrodes that are abnormally low and are not operating normally. can also be determined. Further, the electrodes displayed on the monitor or printer 11 include the signal from the limit switch 12 and the position Wl in the X-Y axis direction of the photographed image based on the display of the reference point 14, as well as the position of the electrode in the image. Since the number is displayed, if an abnormality is found on the monitor, it can be immediately matched with the actual electrode.

Further, since the infrared camera 6 and the limit switch 12 are activated, the detection work can be carried out automatically and reliably without any manual effort. In addition, the thermal image analysis device 10 of the analysis device 8 can print out various detection data using the printer 11, so that the ability to maintain and manage the gold R electrolytic cell can be greatly improved.

In the above embodiment, the reference points 14 are arranged along the X-axis direction, and the limit switches 12 are arranged along the Y-axis direction as photographing position indicating means, and the infrared camera 6 while traveling along the Y-axis while taking pictures at equal intervals, but the invention is not limited to this; conversely, reference points can be arranged along the Y-axis direction, and limit switches can be set in the X-axis direction. By arranging them at equal intervals,
The infrared camera 6 may be moved along the X-axis direction.

In addition, the @Akira position indicating means is also the limit switch 1.
2, for example, a detection means such as a photoelectric element may be used and the infrared camera 6 may be linked with the detection means.

〔Effect of the invention〕

As explained above, the abnormality detection device for electrodes, etc. in a gold JiI'fR decomposition tank according to the present invention has a plurality of An infrared camera is provided for simultaneously photographing the electrodes and the distributor from a two-dimensional perspective, and photographing position indicating means for operating the infrared camera at equal intervals along one side of the metal electrolytic cell is provided at equal intervals; The above gold RIRWna
A reference point is provided along the other side to detect the position of the infrared camera, and a thermal image of the gold jirli dismantling tank subjected to 1iWe by the infrared camera at each predetermined position is analyzed by an analysis device. be. Therefore, according to this abnormality detection device, abnormality detection work for a large number of electrodes can be carried out in a short time and reliably, thereby making it possible to greatly save labor and automate this type of work. .

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a schematic plan view and FIG. 2 is an enlarged view of section A in FIG. 1. 1...Metal electrolytic tank, 2...Electrode, 3.
・・・・・・Distributor, 5：・・・Main truck, 6：・・・Infrared camera, 7：・・・Auxiliary truck, 8：Analyzer, 9：・・・...Video deck, 10...Thermal image analysis device, 11...
...Printer, 12...Limit switch (I
(position indicating means), 14...Reference point. Figure 2

Claims (1)

[Claims] A main truck movably installed on top of the metal electrolytic tank; an infrared camera installed on the main truck for simultaneously taking a two-dimensional bird's-eye view of a plurality of electrodes, distributors, etc. arranged in the metal electrolytic tank; , photographing position indicating means provided along one side of the metal electrolytic tank at equal intervals and activating the infrared camera at regular intervals; and the infrared camera provided along the other side of the metal electrolytic tank. 1. An abnormality detection device for electrodes, etc. in a metal electrolytic cell, characterized in that it comprises a reference point for detecting the position of the metal electrolytic cell, and an analysis device for analyzing a thermal image of the metal electrolytic cell taken by the infrared camera.