JPH027937Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an underwater pollution prevention device.

The present inventor previously devised a pollution prevention device in which a plurality of floats with hanging tails were connected (see Japanese Utility Model Publication No. 11398/1983).

This device is extremely effective under relatively calm conditions such as in sedimentation ponds, rivers, and lakes, but if it is installed in areas with strong waves, such as the ocean, the device may be damaged by the waves or the hanging tail may be damaged. In some cases, the desired effect could not be obtained due to winding or the like.

The inventor of the present invention has completed a device that has a remarkable effect of preventing pollution diffusion even when installed in a place where there are waves as described above.

That is, as shown in FIG. 1, a strip-shaped shield 2 is installed on a coarse net-like material 1. When a rectangular shielding body 2 is installed on this coarse-grained net-like object 1, a gap is provided between the shielding bodies 2 and adjacent shielding bodies 2, and the lower end of the shielding body 2 is provided with a coarse mesh. It is necessary to attach it so that it is shorter than the lower end of the net-like object 1. A specific means for installing the rectangular shielding body 2 on the coarse net-like material 1 is, for example, by using the mesh of the coarse net-like material 1 and knitting it with a string-like material. In this case, the shielding body 2 does not need to completely block water flow, and therefore it is acceptable even if there is a small gap in the shielding body woven from a string-like material. Another method is to integrally attach a plate (this plate may be thick or thin, and if thin, it may be flexible) to the coarse net-like material 1. You can.

In short, the function of the shield 2 is just to be able to substantially prevent the diffusion of pollutants suspended in water. Each rectangular shield 2 has a gap between adjacent shields, and when polluted water passes through this gap, a so-called Karman vortex is generated, and as a result, pollutants in the polluted water are The vortex causes sedimentation and separation, thereby preventing the pollution from spreading outside the pollution diffusion prevention device of the present invention. The lower end of the shield 2 is made shorter than the lower end of the coarse net-like material 1, and a bottom tension rope 6 is provided at the lower end of the coarse net-like material 1. By fixing the anchor 8 to the section, it is possible to prevent the coarse net-like object 1 on which the rectangular shielding body 2 is installed from being rolled up. As the coarse net-like material 1, a net knitted from natural or synthetic fibers, a wire mesh, a plastic molded body having a fine-mesh structure, etc. are used. Although any shape of the mesh can be used, a mesh having a rectangular shape is particularly preferable because it can be easily woven in the vertical and horizontal directions when constructing the shielding body 2 in which the mesh is woven with string-like materials.

When installing a coarse net-like object having a shield according to the present invention in the ocean, etc., as shown in Fig. It may be held between column-shaped half-piece floats, or the coarse net-like part at its upper end may be wrapped around the column-shaped float.

As shown in FIG. 2, the present invention also provides a tension rope 5 at the top of the coarse net having a shield, and a bottom tension rope 6 at the lower end of the coarse net. By connecting these ropes to the anchor 8 by the anchor wire 7, the coarse net provided with the shield 2 will not be rolled up or twisted; This eliminates the drawback of the net-like material being torn from both ends.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a pollution diffusion prevention device according to the present invention, and FIG. 2 is a side view of FIG. 1. 1... Net-like object, 2... Shielding body, 3... String-like object or strip-shaped plate body, 4... Float, 5...
...Tension rope, 6...Bottom tension rope, 7...Anchor wire, 8...Anchor.

Claims (1)

[Scope of utility model registration request] A rectangular shielding body 2 that prevents the diffusion of pollutants in polluted water is spaced apart from adjacent shielding bodies, and a coarse net-like material 1 is attached to the lower end of the shielding body 2. Pollution diffusion by installing a float at the upper end of the coarse net-like material 1 arranged so as to be short, and connecting an anchor wire with an anchor fixed to the tip of a bottom tension rope provided at the lower end of the float. Prevention device.