JPH0431247Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a shorting plate inserted between conductors of an electrolytic cell in electrolytic smelting and used to short-circuit the conductors.

<Prior art and problems> In electrolytic smelting of copper, zinc, etc., electrolysis is performed using a large number of electrolytic cells to increase production efficiency, and these large number of electrolytic cells have a common conductor (bus bar). are interconnected through. Conventionally, a shorting plate has been used to stop energizing a part of an electrolytic cell.

For example, as shown in FIG.
A conductor 11 on the cathode side and a conductor 12 on the anode side are arranged on the side of the electrolytic cells 10a to 10c.
The crossbar 13 of the electrode plate suspended inside c.
The tips of the cathode side conductor 11 and the anode side conductor 12 are arranged alternately.
When connecting to the conductors 11 and 12, the shorting plate 14 is inserted between the conductors 11 and 12 and tightened and fixed with a vise or the like when stopping the energization to the electrolytic cell 10a.

Conventionally, the shorting plate 14 has a large contact cross-sectional area in order to lower the current density and suppress the amount of heat generated. For example, when the plate thickness d is 25 mm, the plate width w and length h are 200 mm x 200 mm. By the way, the conductors 11 and 12 have a large number of cross bars 13.
The distance between the cross bars 13 connected to the anode side conductor 12 is approximately 50 mm to 70 mm, which is narrower than the width w of the shorting plate 14 and approximately 1/2 of the width w of the shorting plate 14. ~1/3. Therefore, in order to insert the shorting plate 14 between the conductors, it is necessary to remove a large number of crossbars, which poses a problem that the work becomes complicated.
In addition, since the shorting plate 14 is large, it is also heavy.
It is also inconvenient to handle.

<Means for solving the problem> The present inventor believes that if the shorting plate is made small, the contact area with the conductor will be reduced, but if the shorting plate is firmly tightened and fixed, the electrical resistance of the contact portion will be relatively small. It was discovered that the heat generation of the short-circuiting plate could be suppressed unexpectedly, and that the area required for the shorting plate was much smaller than the minimum area generally thought necessary.

The present invention aims to reduce the size of the shorting plate based on the above knowledge and solves the conventional problems.

According to the present invention, the shorting plate is inserted between a cathode-side conductor and an anode-side conductor to short-circuit the conductors, and has a thickness approximately equal to the spacing between the conductors,
and has a plate width equal to or smaller than the spacing between the crossbars connected to the outer conductor,
A gripping portion is provided protruding from the upper end surface and a taper is provided at the lower part, and the gripping portion is provided with a protrusion that comes into contact with the upper end of the conductor, and contacts the opposing inner surfaces of the adjacent conductors. A compact shorting plate for an electrolytic cell conductor is provided, which is inserted between the inner surfaces and is clamped and fixed between the conductors on both sides at a position where the protrusion abuts the upper end of the conductor. FIG. 2 shows the shorting plate 14 of the present invention. The shorting plate 14 is made of a highly conductive material such as copper, and is connected to the conductors 11 and 12.
The thickness d of the shorting plate 14 is set to the thickness d of the conductors 11 and 12 so that the surfaces thereof are brought into close contact with each other when inserted between the conductors 11 and 12.
It is almost equal to 〓. In addition, since the shorting plate 14 is firmly tightened with a vice or the like after being inserted between the conductors, the thickness d may be slightly smaller than the gap between the conductors 11 and 12. The width w of the shorting plate 14 is set to be equal to or smaller than the distance between the crossbars connected to the outer conductor, in the illustrated embodiment, the anode side conductor 12. Incidentally, in the embodiment shown in FIG. 1, the crossbar gap is about 60 mm, and the plate width w is set to about 55 mm or less.

Note that the smaller the width w and length h of the shorting plate 14, the smaller the shorting plate 14 becomes, but on the other hand, the shorting plate 14 has enough mechanical strength not to be deformed by tightening with a vise or the like. For example, if the plate thickness d is
When the width is 25 mm, the clamping strength in a vise is 2 t, and the compressive strength of the conductor is 20 Kg/mm, the theoretical minimum values of the width w and length h of the shorting plate 14 are 10 mm x 10 mm. However, in consideration of poor contact due to dirt on the contact surface, ease of handling, etc., it is appropriate to set the area to several to ten times as large as the theoretical minimum value.
As an actual example, w: 50 mm, h: 25 mm, and d: 25 mm are used without any problem in practice.

When the size of the shorting plate 14 satisfies this condition,
Its weight is 400-500g, 1/12 of the traditional weight
The weight can be reduced to ~1/10.

Generally, the maximum value of current flowing through a conductor is
It has been thought that the current is about 1.2 A/mm ² , but in this case, a current of 10 A/mm ² or more can be passed through the short circuit plate.

Further, the shorting plate 14 has a tapered lower portion and a grip portion 15 on the upper end surface so that the shorting plate 14 can be easily inserted between opposing inner surfaces of adjacent conductors. The grip portion 15 may have any shape as long as it can be gripped by an operator, and is not limited to the shape shown. As shown in the figure, the base of the gripping part 15 has a protrusion 1 that comes into contact with the upper end surface of the conductor to act as a stopper when the shorting plate 14 is inserted between the conductors.
5a is provided. The shorting plate 14 has a protrusion 15a
It is pressed against the inner surfaces of the conductors on both sides at the position where they abut, and is tightened and fixed. In this case, since the insertion depths of the shorting plates 14 are made uniform by the protrusions 15a, the plurality of shorting plates 14 can be fixed with uniform tightening force when attached.

<Effects of the invention> Since the shorting plate of the present invention is significantly smaller than conventional ones, it is possible to insert the shorting plate without removing the crossbar of the electrolytic cell. In addition, it is only necessary to insert and fix the short-circuiting device from above into the inner surface of the adjacent conductor, and the installation work is extremely simple compared to conventional short-circuiting devices that sandwich the upper and lower end surfaces of the conductor. Further, since the conductor contacts the opposing inner surfaces of adjacent conductors and is firmly tightened and fixed using a vise or the like, the electrical resistance of the contact portion is relatively small and the amount of heat generated at the contact portion is small. Furthermore, since the insertion depths of the short circuit plates 14 are made uniform by the projections 15a, uniform tightening and fixing can be achieved when attaching a plurality of short circuit plates 14, and good electrical conductivity is maintained.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of an electrolytic cell, and FIG. 2 is an explanatory diagram showing a state in which a short circuit plate according to the present invention is inserted. In the figure, 10a to 10c...electrolytic cells, 11, 12
. . . Conductor, 13 . . . Cross bar, 14 . . . Short circuit plate, 15 .

Claims (1)

[Scope of utility model registration request] A short-circuit plate inserted between a cathode-side conductor and an anode-side conductor to short-circuit the conductors, which has a thickness approximately equal to the distance between the conductors, and which is connected to the outer conductor. The conductor has a plate width equal to or smaller than the interval of , a grip part is protruding from the upper end surface, a taper is provided at the lower part, and the grip part is provided with a protrusion that comes into contact with the upper end of the conductor. , an electrolytic device characterized in that the protrusion is inserted between opposing inner surfaces of adjacent conductors in contact with the inner surfaces thereof, and is clamped and fixed by being sandwiched between the conductors on both sides at a position where the protrusion contacts the upper end of the conductor. A small shorting plate for tank conductors.