JPH0224912B2 - - Google Patents

Description

[Detailed description of the invention] (1) Purpose of the invention Industrial application field The present invention relates to two types of core metals: a core metal for fixing a galvanic anode and a core metal for electrical connection between a galvanic anode and a wire mesh. The present invention relates to a cathodic protection device for a wire mesh fish cage, which comprises a galvanic anode equipped with a galvanic anode.

Conventional technology In the past, a rod-shaped galvanic anode was suspended from the water surface around a wire mesh cage, and the lead wire from the galvanic anode was connected to the wire mesh at the upper part of the wire mesh cage exposed to the air. There is a lowering method.

A direct corrosion protection method has also been proposed in which a required number of galvanic anodes are attached directly to the wire mesh.

For example, Utility Model Application No. 53-31021 and Utility Model Application No. 54
This is as disclosed in Publication No. -35720.

Problems to be Solved by the Invention In the hanging method, the anti-corrosion current does not reach the lower part of the wire mesh cage, and the galvanic anode may swing greatly due to waves and collide with the wire mesh, damaging the wire mesh.

In addition, with the direct connection corrosion protection method, the anticorrosion current can be uniformly applied to the entire wire mesh, resulting in a large corrosion prevention effect, and the hanging method has the advantage that the galvanic anode does not swing greatly due to waves and collide with the wire mesh. It is better than the method. However, in order to install the galvanic anode material underwater using this direct corrosion protection method, the galvanic anode and the metal plate must be opposed to each other at the same position via a wire mesh, and bolts and nuts are used to fix them. It is extremely complicated, as it requires engagement and tightening of the metal plate, and there is also the risk of accidentally dropping the metal plate or galvanic anode during the installation process.

Therefore, the present invention eliminates the above problems,
Even underwater, a galvanic anode can be easily and safely attached by one person from the outside of a wire mesh fish tank without the risk of dropping the galvanic anode. Furthermore, the anti-corrosion current caused by the electrically conductive core metal is not concentrated near the galvanic anode material and causes excessive corrosion, but is dispersed in the surrounding area to provide appropriate corrosion protection over a wide area, improving the effectiveness of the galvanic anode. The purpose is to provide a cathodic protection device that can

(2) Means for Solving the Constituent Problems of the Invention In order to achieve the above object, the present invention provides a small piece or wire mesh surface made of copper, soft iron, or other bendable material that protrudes from the surface of the galvanic anode material. A galvanic anode is provided with two types of core metals: a fixing core bar serving as a hooking part to the galvanic anode material, and a core bar of a good electrical conductor that electrically connects the wire mesh surface and the galvanic anode material. The electrode anode material and the fixing core bar are electrically insulated from the wire mesh surface, and a plurality of the electrically conductive core bars are distributed and installed around the galvanic anode material, and the galvanic electrode material and the fixing core bar are electrically insulated from the wire mesh surface. This is a cathodic protection device for a wire mesh fish tank that electrically insulates the area between the anode material and the mounting part.

Function: The small pieces protruding from the surface of the galvanic anode material and made of copper, soft iron, or other bending deformable materials allow the galvanic anode material to be easily engaged with the wire mesh with the fingertips, keeping it in an electrically insulated state. Can be fixed and held.

The same applies to the case where the engaging portion is engaged with and fixed to the wire mesh. After the galvanic anode is fixed to the wire mesh in this manner, the other electrically conductive core bar is attached to the wire mesh surface to ensure electrical connection.
In this way, the present invention separates the fixing of the galvanic anode material and the electrical connection, uses two types of core metals, and facilitates the fixing operation even underwater.

Multiple core metals with good electrical conductivity are installed distributed around the galvanic anode material, eliminating excessive corrosion of the galvanic anode material as seen in conventional galvanic anodes. It has become possible to obtain a corrosion-preventing current effect over a wide range centered on the mounting parts that are scattered around the area.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In Figures 1 to 3, 1 is a galvanic anode material;
For example, it is made of aluminum alloy and is lightweight and has a galvanic effect. 1a indicates an insulating layer. 2
is a fixing core metal, made of copper, and the end is connected to galvanic anode material 1
It is a band-shaped small piece that protrudes from the base and has bending deformability. It is not limited to copper, and may be made of soft iron or other materials, and can be easily engaged with the wire mesh by bending it with a fingertip or the like. The illustrated example is constructed by integrally casting with the galvanic anode material 1.

Reference numeral 3 denotes a core metal that is a good electrical conductor, and is made of copper, for example.
This core metal 3 is also integrally cast with the galvanic anode material 1. Although not shown, an electrically insulated covered wire may be used. 4 is a wire mesh made of galvanized iron wire. Reference numeral 5 denotes a mounting portion, in which the core bar 3 is fixed to the wire mesh 4 by tightening with a wire. The galvanic anode material 1 was fixed by inserting a fixing core bar 2 into the mesh and bending it inward. The wire mesh side of this fixing core was electrically insulated.

In this embodiment, as described above, the current anode material 1 was once easily engaged and fixed to the wire mesh 4 by the fixing core bar 2, and then the core bar 3, which is a good electrical conductor, was attached to the wire mesh. It is easy to operate, the electrical connection is reliable, and since it is installed distributed around the galvanic anode material, corrosion protection can be achieved over a wide range of areas. It is preferable for the core bar 3 to be relatively long in view of the galvanic effect.

FIGS. 4 to 6 show other embodiments, in which 6 is a galvanic anode material, and 7 is a hook-shaped engagement part, which is cast in a pair with the galvanic anode material 6. The hooking portion 7 fixes the galvanic anode material by hooking it onto the wire mesh 4. 8 indicates a core metal that is a good electrical conductor. Reference numeral 9 denotes a mounting portion, and as shown in FIG. 6, the wire mesh 4 and the core metal 8 are mounted by sandwiching bolts and nuts.

FIG. 7 is a principle diagram showing the galvanic effect, in which a core metal 3 of a relatively short electrically conductive material is placed in the vertical direction of the galvanic anode material 1.
When this is provided, a corrosion protection current flows in the dotted line area around the attachment part 5 and around the galvanic anode material 1, but there is a risk of excessive corrosion protection in the area shown by the double dotted line. Therefore, according to another embodiment of the present invention, as shown in FIG. They were installed in a radial distribution. In this way, the corrosion protection range shown by the dotted line spreads around the periphery of the galvanic anode material without waste, and the effect can be improved.

Furthermore, as another embodiment, the surface of the current anode material 1 on the wire mesh side and the fixing core metal are insulated, the core metal of good electrical conductor is covered with insulation up to the mounting part, and only the mounting part is covered with wire mesh. They were installed so as to be electrically connected and distributed radially around the periphery of the galvanic anode material.

(3) Effects of the Invention As described above, the present invention provides two types of core metals: a core metal for fixing the galvanic anode material and a core bar for electrical connection between the galvanic anode material and the wire mesh. When installing it, it can be easily engaged and fixed on land, underwater, in aquaculture ponds, etc. Also, it is easy to remove. After fixing, the electrical connection between the galvanic anode material and the wire mesh was established.

In addition, core bars with good electrical conductivity are distributed around the galvanic anode material and insulated except for the mounting parts, so anti-corrosion current flows in multiple locations around these mounting parts, widening the range of corrosion protection. The effect became remarkable.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the galvanic anode of the device of the present invention;
Fig. 2 is a side view of the same, Fig. 3 is a perspective view showing the state attached to the wire mesh, Fig. 4 is a plan view showing another embodiment,
Fig. 5 is a side view showing another embodiment attached to a wire mesh, Fig. 6 is an enlarged side view of the mounting part, Fig. 7 is a diagram explaining the principle of anti-corrosion effect, and Fig. 8 is a further embodiment of the present invention. It is an explanatory view of the corrosion prevention effect as an example. DESCRIPTION OF SYMBOLS 1, 6... Current anode, 1a... Insulating layer, 2, 7... Core bar for fixing, 3, 8... Core bar of good electrical conductor, 4... Wire mesh, 5, 9... Mounting part.

Claims (1)

[Scope of Claims] 1. A fixing core protruding from the surface of the galvanic anode material and serving as a small piece made of copper, soft iron, or other bending deformable material or a hooking portion to the wire mesh surface; A galvanic anode is provided with two types of core metals: a core metal of good electrical conductivity that electrically connects the galvanic anode material, and the galvanic anode material and the fixing core metal are electrically insulated from the wire mesh surface. , a plurality of core metals of the electrically good conductor are distributed and installed around the current anode material,
A cathodic protection device for a wire mesh fish tank, characterized in that a galvanic anode material and the mounting portion are electrically insulated except for the mounting portion to the wire mesh. 2 Claim 1 in which an insulating layer is provided on the side surface of the wire mesh for electrical insulation of the galvanic anode material and the fixing core metal
Cathodic protection device for wire mesh fish cages as described in . 3. The electrolytic corrosion protection device for a wire mesh fish tank as set forth in claim 1, wherein the electrically conductive core metal is electrically insulated from the galvanic anode material by attaching it in a floating manner with respect to the wire mesh surface. 4. The electrolytic corrosion protection device for a wire mesh fish cage as set forth in claim 1, wherein an insulated wire is used between the galvanic anode material and the attachment portion as electrical insulation of the core metal, which is a good electrical conductor. 5. The electrolytic corrosion protection device for a wire mesh fish tank as set forth in claim 1, wherein the metal core of a good electrical conductor is radially distributed around the current anode material and attached to the wire mesh.