JPS5941230Y2 - Device to prevent adhesion of shellfish, etc. - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for preventing the adhesion of shellfish, etc., and more specifically to steel pipes that are partially exposed above the sea surface, such as steel pipe piles on piers and piping in petrochemical plants. This invention relates to a device that prevents shellfish and the like from adhering to the object.

In general, for steel pipe piles and piping that are erected underwater with a portion exposed above the sea surface, shellfish and marine microorganisms can attach and propagate in the parts that are submerged in seawater, causing corrosion of the material. Therefore, it is regularly removed and anticorrosive paint is applied.

However, this work is inefficient because it has to be carried out at sea, and the removed shellfish cannot be dropped directly into the sea to prevent pollution, and it takes time and effort to collect and process them to prevent pollution. There were also disadvantages such as high labor costs.

Normally, cathodic protection measures are applied to these underwater steel pipes to prevent corrosion.This method is effective for parts that are permanently underwater, but for parts that are exposed above the water surface at low tide. This has the disadvantage that shellfish, etc., which remain attached to and multiply in this area at high tide, have an adverse effect because they do not have an electrolytic protection function.

The present invention eliminates the above-mentioned drawbacks of the conventional pipes, and prevents shellfish from adhering to them by rubbing the outer circumferential surface of steel pipes in response to fluctuations in water level during the ebb and flow of the tide. be.

According to the present invention, as shown in Fig. 1, a steel pipe 1 is erected with a part exposed above the sea surface, and a sliding piece 2 made of synthetic resin, rubber, wood, etc. is protruded on the inner peripheral surface. Loosely attach the floating ring 3.

The float may be a hollow body, or in the case of wood, it may be a solid ring.

The cross section of the float is circular, semicircular, or rectangular as shown in Figure 3. Especially in sea areas where large-diameter steel pipes and shellfish are likely to attach, the inner circumferential surface of the float with a rectangular cross section has many scratches. It is advantageous to use a strip.

It is preferable to prepare semicircular floats with various radii, select them according to the diameter of the desired steel pipe at the time of use, connect the two with the flange 4, and attach them to the steel pipe. .

In Figure 1, a brush-shaped piece is shown as the rubbing piece 2, but as shown in Figure 2A, it may be made of a synthetic resin sheet with appropriate cuts made and stretched out in a pleated shape, or as shown in Figure 2A. It may also be one in which a large number of small protrusions are formed protrudingly as shown in FIG.

The sliding piece is made of synthetic resin, rubber, wire, etc.
It can be molded integrally with the float, or if it is made of a different material from the float, it can be implanted later into the molded float.

The present invention has the above-mentioned configuration, and the floating ring 3 moves up and down in response to changes in sea level due to the ebb and flow of the tide.
This prevents the adhesion of plankton from shellfish before they grow, and the adhesion of other marine microorganisms and seaweed is immediately removed by the rubbing piece 2, so corrosion on the surface of the steel pipe 10 can be always prevented. .

Since the floating ring 3 and the sliding piece 2 are made of materials such as synthetic resin, rubber, and wood, they do not damage the surface of the steel pipe 10, and are extremely safe since no sparks are generated.

As described above, according to the present invention, it is possible to omit the cumbersome and expensive shellfish removal work that has traditionally been done manually, thereby significantly reducing costs and preventing the adhesion of shellfish, etc. can be carried out extremely effectively.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one example of the shellfish adhesion prevention device according to the present invention, FIGS. 2A and B are longitudinal sectional views of other examples, and FIG. 3 is a sectional view of still another example. In the figure, reference numerals 1 indicate a steel pipe, 2 a sliding piece, 3 a floating ring, and 4 a connecting flange.

Claims (1)

[Scope of utility model registration request] A device for preventing adhesion of shellfish, etc., consisting of a floating ring with protruding rubbing pieces.