JP4497697B2 - Bonding structure of electrode terminal to electrode plate for electrolytic cell - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for joining electrode terminals to an electrode plate used in an electrolytic cell for generating electrolyzed water.
[0002]
[Prior art]
An electrolytic cell for producing electrolyzed water has an ion exchange membrane disposed between a cathode electrode plate and an anode electrode plate, and electrolyzes water to produce alkaline water on the cathode side and acid water on the anode side. Alkaline water is used for eating and drinking, and acidic water is used for beauty and the like.
[0003]
When a rod-shaped electrode terminal is bonded to the electrode plate, the conventional bonding structure cuts a part of the end of the electrode plate 100 to open the square window 103 and is bent as shown in FIG. The insertion portion 102 of the rod-shaped electrode terminal 101 is formed by processing, the electrode terminal 101 is inserted into the insertion portion 102, and the electrode plate 100 and the electrode terminal 101 are joined by spot welding.
[0004]
However, it takes time to process the electrode plate 100, and when platinum, iridium, ruthenium, or the like adheres to the surface of the electrode plate 100, the bending of the electrode plate 100 causes platinum to peel off or the electrode There is a problem that the plate 100 is cracked, and even if the electrode terminal 101 is inserted and spot-welded, the electrode plate 100 and the electrode terminal 101 are poorly bonded due to the crack, and the electrode plate 100 is being used. There was a risk that the electrode plate 100 and the electrode terminal 101 could be easily detached.
[0005]
By the way, in an electrolytic cell having a plurality of electrolysis chambers, a plurality of electrode plates 100 having the same polarity are disposed. Therefore, the electrode terminals 101 of the electrode plates 100 having the same polarity are connected to each other by a terminal plate (not shown). Connect the power cord to the plate. And the attachment of the said terminal plate to the electrode terminal 101 passes the attachment hole drilled in the said terminal plate through the external thread part 104 provided in the electrode terminal 101, and tightens a nut (illustration omitted) to the external thread part 104. Is going to.
[0006]
However, when the nut is strongly tightened, there is a problem that a large torque is generated in the electrode terminal 101 and the spot welded portion by the spot welding is peeled off.
[0007]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems of the prior art, and can join the electrode terminals without bending the electrode plate, and the electrode plate and the electrode terminal can be joined by the tightening force of the nut. An object of the present invention is to provide a structure for joining an electrode terminal to an electrode plate for an electrolytic cell that can prevent a weld from peeling off.
[0008]
[Means for Solving the Problems]
The junction structure of the electrode terminal to the electrode plate for an electrolytic cell of the present invention is a junction structure of the electrode terminal to the electrode plate used for the electrolytic cell for generating electrolyzed water, and is flattened at the base end of the rod-shaped electrode terminal. The flat portion is formed on the electrode plate, the flat surface of the flat portion is brought into surface contact with the electrode plate, and the flat portion and the electrode plate are joined by a spot welded portion. Is.
[0009]
Further, the flat portion is displaced in the radial direction from the central axis of the electrode terminal so that the electrode plate is positioned on the central axis of the electrode terminal by bringing the flat surface of the flat portion into surface contact with the electrode plate. It is desirable to form it parallel to the central axis at a certain position.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6.
[0011]
As shown in FIG. 6, the electrolytic cell A for generating electrolyzed water has a plurality of electrolysis chambers 2 provided in a housing 1, and each electrolysis chamber 2 is provided with an electrode plate 3 and an ion exchange membrane 4. It has a tank structure.
[0012]
The electrode plate 3 is formed by baking a platinum layer on one or both sides of a titanium conductive substrate, and fine irregularities are formed on the surface of the conductive substrate to enhance the adhesion of the platinum layer. Note that iridium, ruthenium, or the like may be used instead of the above platinum.
[0013]
As shown in FIGS. 1 and 2, an electrode terminal 5 made of titanium is joined to the upper end portion of each electrode plate 3. The electrode terminal 5 is formed in a round bar shape, a male screw portion 5a is formed at the tip, and the base end portion of the electrode terminal 5 is flattened to form a flat portion 6. As shown in FIG. 3, the flat portion 6 is formed at a position avoiding the central axis O of the electrode terminal 5, and flat surfaces 6 a are formed on the upper and lower surfaces of the flat portion 6. In addition, as shown in FIG. 3, the cut surface 6b may be formed by cutting both ends of the flat portion 6 at right angles to the flat surface 6a in consideration of design and the like.
[0014]
When joining the electrode terminal 5 to the electrode plate 3, as shown in FIGS. 2 and 3, the flat portion 6 of the electrode terminal 5 is overlapped with the end portion of the electrode plate 3 and is closer to the central axis O of the electrode terminal 5. The flat surface 6 a is brought into surface contact with the electrode plate 3, the electrode plate 3 is positioned at the central axis O of the electrode terminal 5, the flat portion 6 and the electrode plate 3 are spot welded, and the flat portion 6 is connected to the flat portion 6 by the spot welding portion 7. The electrode terminal 5 is joined. In FIG. 2, the spot welds 7 are formed at two locations along the central axis O of the electrode terminal 5, but the number is not particularly limited.
[0015]
As shown in FIG. 6, the electrode plate 3 is composed of a first electrode plate 3a and a second electrode plate 3b, and the first electrode plate 3a has an electrode terminal 5 joined to one side of the upper end portion and the second electrode plate 3a. The electrode terminal 5 is joined to the other side of the upper end of the electrode plate 3b. A notch 31 for positioning the electrode plate 3 in the housing 1 is formed at the upper end of the electrode plate 3.
[0016]
As shown in FIG. 4, a plurality of projecting holes 8 for projecting the electrode rods 5 are formed in a staggered pattern on the upper plate 1 a of the housing part 1.
[0017]
As shown in FIG. 6, the first electrode plate 3 a and the second electrode plate 3 b are alternately arranged in the housing 1, whereby the first electrode plate 3 a and the second electrode are provided in each electrolytic chamber 2 of the housing 1. The plate 3b is located, and the boundary portion between the adjacent electrolysis chambers 2 is partitioned by the first electrode plate 3a or the second electrode plate 3b.
[0018]
Moreover, the alkali ion chamber 9 and the acidic ion chamber 10 are formed in each electrolysis chamber 2 by interposing the ion exchange membrane 4 between the first electrode plate 3a and the second electrode plate 3b. The housing 1 positioned above and below the alkaline ion chamber 9 and the acidic ion chamber 10 is formed with an ion water discharge port 11 and tap water introduction port 12. 4 and 5 omit the ion water discharge port 11.
[0019]
When attaching the electrode plate 3 with the electrode terminal 5 to the housing 1, the electrode terminal 5 is inserted into the protruding hole 8 from the inside of the housing 1, and the male screw portion 5 a of the electrode terminal 5 is protruded to the outside from the protruding hole 8. After the notch 31 of the electrode plate 3 is fitted into a positioning piece (not shown) provided in the housing 1 to position the electrode plate 3 in the housing 1, the peripheral portion of the electrode plate 3 is fixed to the housing 1.
[0020]
In this case, it is necessary to operate the electrode terminal 5 and the electrode plate 3 at the same time and attach them to the housing 1. However, since the electrode plate 3 is located on the central axis O of the electrode terminal 5, Compared with the case where the position of the terminal 5 is shifted from the central axis O, an operation considering the positional shift is not required, and the work of attaching the electrode plate 3 with the electrode terminal 5 to the housing 1 becomes easy.
[0021]
The electrode terminals 5 of the first electrode plate 3 a protruding from the protruding hole 8 and the electrode terminals 5 of the second electrode plate 3 b are connected by a terminal plate 13. Each terminal plate 13 is provided with a mounting hole 13a. The mounting hole 13a is fitted into the male screw portion 5a of the electrode terminal 5, and the nut 14 is screwed into the male screw portion 5a, whereby the terminal plate 13 is attached to the electrode terminal 5. It is fixed.
[0022]
When the nut 14 is strongly tightened when the terminal plate 13 is fixed to the electrode terminal 5, the electrode terminal 5 rotates about the central axis O as shown by the arrow in FIG. Although the force which is going to generate | occur | produces, since the flat surface 6a of the flat part 6 is closely_contact | adhered to the electrode plate 3, rotation of the electrode terminal 5 is controlled by presence of the flat part 6, and the force which acts on the spot welding part 7 Can be reduced, and peeling of the spot weld 7 can be prevented.
[0023]
Two lead terminals derived from a power cable (not shown) are connected to the terminal plate 13 of the electrolytic cell A configured as described above, and the first electrode plate 3a is used as an anode and the second electrode plate 3b is used as a cathode. Electrolysis is performed when a direct current is applied.
[0024]
A water purifier is attached to the electrolyzer A, and tap water is supplied into the electrolysis chamber 2 from the inlet 12 of the electrolyzer A through the water purifier by tap water pressure, and a DC voltage is applied to the electrode plate 3. Alkaline water is generated in the alkaline ion chamber 9 of the electrolytic cell A, and acidic water is generated in the acidic ion chamber 10, and the acidic water and alkaline water are discharged from the discharge port 11 to the outside.
[0025]
In addition, since the 1st electrode plate 3a and the 2nd electrode plate 3b are arrange | positioned and adjoined in the narrow electrolytic chamber 2, high current efficiency is obtained. Moreover, since water flows along both surfaces of the electrode plate 3 that partitions the electrolysis chamber 2, the water contact area of the electrode plate 3 can be increased, the electrolysis efficiency can be improved, and the electrolytic cell A can be downsized. Become.
[0026]
Further, the electrolytic cell A is configured to prevent the adhesion of the scale to the electrode plate 3 by reversing the polarity of the electrode plate 3 at regular intervals.
[0027]
【The invention's effect】
As is clear from the above description, according to the joining structure of the electrode plate and the electrode terminal of the present invention, the flat surface of the flat portion of the electrode terminal is brought into contact with the electrode plate, and the flat portion is joined to the electrode plate by the spot welding portion. Therefore, the influence of the tightening force applied to the spot welded portion can be reduced.
[0028]
In addition, when the electrode plate is not required to be bent, productivity is improved, and when a platinum layer, an iridium layer, a ruthenium layer, or the like is formed on the surface of the electrode plate, the platinum layer is not peeled off by bending. In addition, the electrode plate and the electrode terminal are not detached when the electrode plate is being used.
[0029]
Moreover, since the said electrode plate was located on the central axis of the said electrode terminal, the assembly efficiency of an electrolytic cell can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an operation of joining electrode terminals to an electrolytic cell electrode plate according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a bonding structure of electrode terminals to an electrolytic cell electrode plate according to an embodiment of the present invention.
FIG. 3 is a plan view showing a bonding structure of electrode terminals to an electrolytic cell electrode plate according to an embodiment of the present invention.
FIG. 4 is a perspective view showing an operation of attaching a terminal plate to an electrode terminal.
FIG. 5 is a perspective view showing an operation of attaching a terminal plate to an electrode terminal.
FIG. 6 is a schematic cross-sectional view showing an electrode tank.
FIG. 7 is a perspective view showing a joining operation of an electrode terminal to a conventional electrolytic cell electrode plate.
FIG. 8 is a perspective view showing a joining structure of an electrode terminal to a conventional electrode plate for an electrolytic cell.
[Explanation of symbols]
A Electrolyzer A
DESCRIPTION OF SYMBOLS 1 Housing 2 Electrolytic chamber 3 Electrode plate 4 Ion exchange membrane 5 Electrode terminal 6 Flat part 6a Flat surface of the flat part 6 Terminal plate

Claims (2)

A structure for joining electrode terminals to an electrode plate used in an electrolytic cell for generating electrolyzed water, wherein a flat portion is formed at a base end of a rod-shaped electrode terminal, and the flat portion is stacked on the electrode plate. A flat surface of the electrode terminal is brought into surface contact with the electrode plate, and the flat portion and the electrode plate are joined by a spot welded portion. A position in which the flat portion is radially displaced from the central axis of the electrode terminal so that the electrode plate is positioned on the central axis of the electrode terminal by bringing the flat surface of the flat portion into surface contact with the electrode plate The electrode terminal joining structure to the electrode plate for an electrolytic cell according to claim 1, wherein the electrode terminal is formed in parallel with the central axis.

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