JPS6353281A - Flexible electrode - Google Patents

Abstract

PURPOSE:To produce the title flexible electrode to be used in electrolytic protection, etc., by coating a copper core wire with a flexible insulating material, and connecting the copper core wire at the openings obtained by cutting off the coated layer at regular intervals in the lengthwise direction to an electrode member consisting of electrically conductive fiber through a conductive connecting member. CONSTITUTION:A flexible insulating material 2 of synthetic resin, etc., is coated around a core wire 1 obtained by bundling many small-diameter copper wires to obtain a flexible copper wire 3. Plural circumferential cutouts 4 are provided on the copper wire 3 at regular intervals in the lengthwise direction. The base end of a doughnut conductive connector 6 of the metals such as Ti and Nb held by an insulating sheet material 5 of synthetic resin, etc., on both sides is connected to the cutout 4, and the respective tips of the plural connector 6 are bridged by a cylindrical and meshy electrode member 7 formed with conductive carbon fiber contg. a small amt. of noble metals such as Pt and Ir or their oxide. A corrosion protecting electrode for a metallic member, the reinforcing steel of reinforced concrete, steel structures, etc., buried in soil can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flexible electrode used for cathodic protection, wastewater treatment, various electrolysis, and the like.

(Prior art and its problems) Conventionally, in order to prevent corrosion of metal parts buried in the ground such as bridge piers, reinforcing bars of concrete, steel frames, etc., a conductive coating is formed on the surface of the bridge piers and concrete and used as a cathode. An electrode having a plate-like, mesh-like, or cylindrical shape, for example, is used as an anode to supply electricity. In order to install the electrode at the required location for corrosion protection, the electrode and the conducting wire for energizing it must be manufactured separately, and the two must be connected and installed on site, which is complicated.
Furthermore, it is desirable to install the cathodic protection electrode close to the member to be protected, but since the conventional corrosion protection electrode has the shape described above and is not flexible, it is difficult to change it to the desired shape. (a) Since the electrode and conductor are manufactured separately, the work to connect them to form a corrosion-protective electrode must be done on-site, which can easily cause problems with the connection, and (b) the electrode Since the shape is fixed, there is a drawback that the shape of the electrode cannot be changed depending on the shape of the member to be protected against corrosion.

(Object of the Invention) The present invention has been made in order to solve the drawbacks of the prior art described above, namely, that the electrodes are not flexible and troubles are likely to occur at the connection between the electrodes and the conductive wires. The purpose is to provide connected flexible electrodes.

(Means for Solving the Problems) The present invention involves incising the insulating coating of a flexible conductive wire on which an insulating coating is formed at a plurality of locations in the length direction, and removing the conductive wire at the plurality of incisions. An electrode member made of a conductive fiber having corrosion resistance is arranged around the conductive connecting body sealed with an insulating sealing material so as to be connected to each of the conductive connecting bodies. It is a flexible electrode, and its greatest feature is that the entire electrode is flexible.

The present invention will be explained in detail below.

The conductive wire used in the present invention may be any ordinary conductive wire with a core wire made by bundling a large number of small-diameter copper or aluminum wires, etc., and a coating made of a corrosion-resistant insulating material such as synthetic resin formed around the core wire. However, the insulating material is flexible so that the entire conductor can be deformed into any shape.

Since the conductor is used underground and in concrete,
Preferably, the coating is corrosion resistant, and if desired the coating can be double or more.

Incisions are preferably formed at required locations along the length of the conductor at approximately equal intervals, and the insulating material covering the core wire is removed in the circumferential direction entirely at these locations, or a portion of the insulating material is removed in an arc shape. Remove it in one or more places.

Next, a conductive connecting body for connecting the core wire and an electrode member to be described later is placed in the incision. The conductive connecting body is preferably in a donut shape and is brought into contact with the core wire from which insulating material has been completely removed in the circumferential direction, or is in a fan shape and is brought into contact with the core wire from which the insulating material has been removed in an arc shape. bring it into contact with. This electrically conductive connector is sealed with an insulating sealant such as synthetic resin to prevent leakage of current through the electrically conductive connector. Note that the conductive connector and the sealing material may or may not be flexible, and are preferably not flexible in order to resist external pressure. In view of conductivity and corrosion resistance, the conductive connector is preferably made of a film-forming metal such as titanium, niobium, tantalum, zirconium, hafnium, or an alloy thereof.

An electrode member made of a conductive fiber having corrosion resistance is passed between the tips of the plurality of conductive connectors and connected to the tips, and the current flowing in the conductor is passed through the conductive connectors. or current in the electrode member is directed into the four wires through the electrically conductive connection. This connection may be made by any connection means such as fixing or pressure welding as long as it electrically connects the conductive connector and the electrode member.

The electrode member made of conductive fibers is flexible to provide flexibility to the electrode, and is preferably in the form of a mesh.

The electrode member is particularly preferably a conductive fiber which is a carbon fiber or a fiber mainly containing carbon, and the tetraelectric fiber also contains a small amount of precious metals such as platinum, iridium, palladium, rhodium, ruthenium, etc. It may also contain oxides, other metals, alloys, solid solutions, etc.

The electrode of the present invention having such a structure can be used not only as an anode for cathodic protection, but also as an anode and cathode for wastewater treatment, and as an anode and cathode in various electrolysis applications, in fields where the electrode is required to be flexible. Can be widely used. For example, when buried in concrete for concrete corrosion protection, the flexible electrode of the present invention is deformed according to the shape of the reinforcing bars or steel frames and placed close to the reinforcing bars or steel frames. Concrete is then poured around the reinforcing bars and steel frames to form a concrete building. When current is applied from the anode, which is the flexible electrode, the current is passed through the reinforcing bars and steel frames to be protected against corrosion, thereby preventing corrosion. As a result, regardless of the installation location, the anode and cathode are located as close as possible to each other, reducing the resistance between the two electrodes and reducing the applied voltage, resulting in energy savings. Furthermore, since the conducting wire and the electrode base material can be integrated and standardized, they can be mass-produced in factories, and there are almost no problems with the connection parts.

(Example) The present invention will be described in more detail below as an anode for cathodic protection based on the examples shown in the accompanying drawings, but the examples do not limit the present invention. The electrode can also be used as an anode in other applications, or as a cathode for sacrificial protection or as a cathode in other applications.

FIG. 1 is a longitudinal sectional front view showing one embodiment of a flexible electrode according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view taken along the line 1--2 in FIG.

A sheathing 2 made of a flexible insulating material such as synthetic resin is formed around a core wire 1 made of a bundle of many small-diameter copper wires, etc., and the core wire 1 and sheathing 2 constitute a flexible conducting wire 3. has been done. The sheath 2 of the conducting wire 3 is completely removed in the circumferential direction at equal intervals in the length direction, and a plurality of cutouts 4 are formed in the conducting wire 3.

The proximal ends of donut-shaped conductive connectors 6 whose left and right sides are sandwiched between insulating sealing materials 5 such as synthetic resin are connected to each of the incisions 4, and the plurality of conductive connectors 6 A cylindrical and net-like electrode member 7 made of conductive fibers such as carbon fibers is connected between the ends of each of the conductive wires 3 and the electrode member by the conductive connector 6. 7 is connected.

The flexible electrode of this embodiment having such a configuration can be buried as an anode for cathodic protection, for example, in close proximity to reinforcing bars or steel frames in concrete, and having its shape deformed according to the reinforcing bars or steel frames. When the conductor wire 3 of the electrode is energized, the current flows from the conductor wire 3 through the conductive connector 6 to the electrode member 7, and flows from the electrode member 7 through the concrete toward the surface of the reinforcing bars or steel frame of the concrete, for example. Corrosion protection for reinforcing bars, etc. can be achieved.

(Effects of the Invention) According to the present invention, at least the conductive wire and the electrode member connected by the conductive connecting body are made of a flexible material, thereby imparting flexibility to the entire electrode and making it possible to deform it into any shape. For,
Regardless of the installation location, the optimal placement is made according to the shape of the counter electrode, etc. This allows the anode and cathode to be located as close as possible, reducing the resistance between the two electrodes, reducing the applied voltage, and saving energy. becomes possible. Furthermore, since the conductor and electrode components can be integrated and standardized, mass production is possible without problems with connections at the factory, and since it can be handled in the same way as regular electric wires, it is easy to use in the field. Work efficiency is greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional front view showing one embodiment of a flexible electrode according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view taken along the line nn of FIG. 1...Core wire 2...Sheathing 3...Conductor wire 4...Incision part 5...Sealing material 6...Conductive connector 7...Electrode member procedure (from 1984) September 19, 2015 1. Display of the case 1986 Patent Application No. 196971 2. Name of the invention Flexible electrode 3. Person making the amendment Relationship to the case Patent applicant address 1159 Ishiyo, Uzuzawa City, Kanagawa Prefecture Name: Belmelec Electrode Co., Ltd. 4, Agent address: 4-37 Kusunoki-cho, Nishi-ku, Yokohama, Kanagawa Prefecture; Subject of amendment: "Detailed Description of the Invention" column 8 of the specification; Contents of the amendment (1) Page 2 of the specification; Lines 7 to 10, "A pier or concrete... is used and is energized." The above-mentioned metal member is connected as a cathode and energized.''(that's all)

Claims (4)

[Claims] (1) The insulating coating of a flexible conducting wire with an insulating coating formed thereon was incised at multiple locations in the length direction, and the periphery of the conducting wire at the multiple incisions was sealed with an insulating sealing material. A flexible electrode characterized in that an electrode member made of a conductive fiber having corrosion resistance is disposed so as to be connected to each of the conductive connectors via a conductive connector. (2) The flexible electrode according to claim (1), wherein the conducting wire is made of copper. (3) Claims (1) or (2) in which the conductive fibers are reticulated carbon fibers or fibers mainly containing carbon.
Flexible electrodes as described in Section. (4) The flexible electrode according to any one of claims (1) to (3), which is an anode for cathodic protection.