JPS61217587A - Electrolytic corrosion preventive device for metallic wire net crawl - Google Patents

Abstract

PURPOSE:To enable corrosion prevention over a wide range and to prevent excessive corrosion prevention by using two kinds of core metals to fix a galvanic anode material and to separate the electrical connection thereof and installing dispersively the electrically connected core metals around the above- mentioned anode material. CONSTITUTION:This electrolytic corrosion preventive device for a metallic wire net crawl is constituted by attaching the galvanic anode material 1 to a metallic wire net 4 by using the core metal 2 for fixing and the core metals 3 consisting of good electrical conductors and insulating electrically the part from the material 1 to the attaching part 5 except the attaching part of the metals 3. the above-mentioned metal 2 projects from the surface of the material 1 and acts as a small piece part consisting of copper, mild steel or other materials having flexural deformability or an engaging part to the surface of the net 4. The metals 3 connect electrically the surface of the net 4 and the material 1 and are installed in plurality dispersively around the material 1.

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 Publication No. 53-31021 and Utility Model Application Publication No. 54
This is as disclosed in Japanese Patent 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 swings greatly due to waves and may collide with the wire mesh, damaging the wire mesh.

In addition, in the direct connection corrosion protection method, the anticorrosion current can be uniformly applied to the entire wire mesh, resulting in a greater corrosion prevention effect, and it is superior to the above-mentioned hanging method in that the galvanic anode does not swing greatly due to waves and collide with the wire mesh. is also excellent. However, in order to install the galvanic anode 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 the fixation requires the engagement of bolts and nuts. There are other problems, such as the need for tightening and tightening, which is extremely complicated, and the risk of accidentally dropping the metal plate or galvanic anode during the installation process.

Therefore, the present invention eliminates the above-mentioned problems and allows one person to easily insert a galvanic anode from outside a wire mesh cage even underwater.
Moreover, there is no danger of dropping the galvanic anode, and it can be installed safely and reliably. 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-mentioned object, the present invention provides a small piece portion or wire mesh surface that protrudes from the surface of the galvanic anode material and is made of copper, soft iron, or other bending deformable 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 core bars of the electrically good conductor are distributed and installed around the galvanic anode material, and the galvanic current 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.

A small piece protruding from the surface of the active current anode material and made of copper, soft iron, or other bending deformable material allows the current current anode material to be easily engaged with the wire mesh by hand, and fixed and held in an electrically insulated state. I can do it.

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. Corrosion-preventing current action can now be obtained over a wide range centered on the mounting parts scattered around the area.

Example An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a galvanic anode material, which is made of, for example, an aluminum alloy and is lightweight and has a galvanic effect. la indicates an insulating layer. Reference numeral 2 denotes a fixing core metal, which is made of copper and whose end portion is a small band-shaped piece protruding from the galvanic anode material 1 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 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 l.

Although not shown, a tlrJ or gas-insulated wire may be used. 4 is a wire mesh made of galvanized iron wire. Reference numeral 5 denotes a mounting part, in which the core bar 3 was fixed to the wire mesh 4 by tightening with a wire. The galvanic anode material 1 was fixed by inserting the fixing core bar 2 into the mesh and bending it inward. The wire mesh side of this fixing core was electrically insulated.

In the unimplemented example, as described above, the current anode material 1 was once easily engaged and fixed to the wire mesh 4 using the fixing core bar 2, and then the core bar 3, which is a good electrical conductor, was attached to the wire mesh, so that the mounting operation was easy. It is simple, 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.

4 to 6 show other embodiments, in which 6 is a galvanic anode material, and 7 is a hook-shaped engaging part, which is integrally cast with the galvanic anode material 6. Engagement part 7 is gold II! Fix the galvanic anode material by hooking it to U4. Reference numeral 8 indicates a core bar of good electrical conductor, and reference numeral 9 indicates a mounting part, which is attached to a wire mesh 4 as shown in Fig. 6.
and the core metal 8 are attached by sandwiching bolts and nuts.

FIG. 7 is a principle diagram showing the galvanic effect. When a relatively short core bar 3 of good electrical conductivity is provided in the upper direction of the galvanic anode material 1,
Although the anticorrosion current flows in the dotted line area around the attachment part 5 and around the galvanic anode material 1, there is a risk of excessive corrosion protection in the area shown by the double dotted line.

Therefore, in the present invention, as a further embodiment, as shown in FIG. They were distributed and installed. 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.

Another example is to insulate the wire mesh side surface of the galvanic anode material l and the fixing core metal, cover the core metal with good electrical conductivity up to the mounting part, and insulate only the mounting part with wire mesh. One digit was distributed radially around the periphery of the galvanic anode material so as to be electrically connected to the galvanic anode material.

(3) Effects of the Invention As described above, the present invention provides two types of core metals: a core bar 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 secured and fixed anywhere on land, underwater, or in aquaculture ponds. Also, it is easy to remove. After fixing, the electrical connection between the galvanic anode material and the wire mesh was ensured.

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 was significant.

[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, and FIG. 3 is a perspective view showing the state in which it is attached to a wire mesh.
Fig. 4 is a plan view showing another embodiment, Fig. 5 is a side view showing the other embodiment attached to a wire mesh, Fig. 6 is an enlarged side view of the mounting part, and Fig. 7 is an explanation of the principle of anti-corrosion effect. FIG. 8 is an explanatory diagram of the anticorrosion effect as yet another embodiment of the present invention. l, 6... Galvanic anode 1a... Insulating layer 2.7...
・Fixing core metal 3.8... Core metal with good electrical conductor 4
... Wire mesh 5.9 ... Installation department agent Patent attorney
Oshima-ko Figure 1 Figure 4 Figure 5 Figure 7

Claims (5)

[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 part to the wire mesh surface, and the wire mesh surface and the galvanic anode material A galvanic anode is provided with two types of core metals, a core bar of a good electrical conductor and a core bar of a good electrical conductor, and the galvanic anode material and the core bar for fixing are electrically insulated from the wire mesh surface, A wire mesh fish cage characterized in that a plurality of core metals are installed distributed around the galvanic anode material, and the galvanic anode material and the mounting portion are electrically insulated except for the mounting portion to the wire mesh. Cathodic protection equipment. (2) The cathodic protection device for a wire mesh fish tank as set forth in claim 1, wherein 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. (3) The electrolytic corrosion protection device for a wire mesh fish tank as set forth in claim 1, wherein the galvanic anode material and the mounting portion are attached in a floating manner with respect to the wire mesh surface as electrical insulation of the core bar of a good electrical conductor. (4) As electrical insulation of the core bar of the electrically good conductor, an insulating coated wire is used between the attachment parts from the galvanic anode material as claimed in claim 1.
Cathodic protection device for wire mesh fish cages as described in . (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.