JPH041801Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] Eutrophication of the hydrosphere and water pollution have become major problems on a global scale as one of the major distortions of modern industrial civilization. Water hyacinth has grown abnormally in the aquatic area.

Water hyacinth is known for its amazing yield and great ability to extract nutrients and toxic elements.
It has become an important biomass resource plant because it has a wide variety of utility values such as biomass resources, fertilizers, and cellulose resources, so its cultivation has started in various places.

The present invention relates to a cultivation facility structure for cultivating floating aquatic plants such as water hyacinth.

[Prior application technology]

The inventors of the present invention have already proposed the structure of such an aquatic plant cultivation facility in Japanese Patent Application No. 58-075254.

The structure of the cultivation facility of this prior application will be explained with reference to the drawings. It has a structure in which a large number of flexible columnar bodies are housed in a flexible cylindrical bag, both ends of which are connected, and a flexible linear body is connected to this. An elastic net 2 is attached to the upper end circumference of the elastic net 2 around one annular float 1 that is integrated with the cylindrical body 10a along the cylindrical body or one annular float that is formed by connecting a large number of rigid cylindrical bodies in an annular shape. The elastic net 2 is stretched in an annular manner by the attached flexible linear body 10 for tensioning and a large number of supports 11 that support the flexible linear body 10 for tensioning. A rope 4 having an anchor 3 is attached to the annular float 1.

According to the cultivation facility structure of the prior application, it can be constructed without using long, heavy and rigid materials, so it is easy to transport and handle, and it can be constructed easily and in a short time, and it is also easy to move after construction. This can be done easily by pulling up the anchor 3 and towing the boat, so it is possible to increase the yield of aquatic plants by changing the cultivation location, or by moving the harvest to a convenient location, for example, near the shore. It is easy to do, and since the annular float 1 and the net 2 swing up and down according to the water level and wave movement, it is possible to prevent aquatic plants from being washed away from above and below the net 2 due to the water level and wave movement. However, because the annular float 1 has a single layer structure, the fixing force of the elastic net 2 is insufficient, and the buoyancy is insufficient, resulting in low stability of the entire facility. If the material is not attached, there is a risk that the elastic net 2 may tilt, and it is difficult to tow the facility smoothly and quickly during the cultivation of aquatic plants, and it is also difficult to expand the scale of the facility.

[Purpose of invention]

Therefore, the present invention aims to improve the above-mentioned drawbacks without impairing the features of the cultivation facility structure of the earlier application. It provides a large-scale facility where aquatic plants can be cultivated.

[Structure of the idea]

In order to achieve the above object, the facility structure of the present invention is such that an elastic net 2 having elasticity is stretched between two annular floats 1, 1 which are arranged concentrically and have elasticity due to flexure, as shown in the drawing. The elastic net 2 is suspended and a portion of about 1/3 of the net width from the lower end of the elastic net 2 is fixed.

[Configuration of Example]

An embodiment of the present invention will be explained below with reference to the drawings. Fig. 1 is a perspective view showing the structure of an embodiment of the structure of the present invention, and Fig. 2 is a plan view thereof. Two annular floats are arranged. These annular floats 1, 1 have the same structure as the one in the above-mentioned prior application which has elasticity due to flexure.

There is a distance of 65 to 100 cm between these two annular floats 1 and 1.
An elastic net 2 such as a plastic net having elasticity of a width is attached to the upper end circumference of the elastic net 2, and a flexible linear body 10 for tensioning made of metal, plastic, etc. The wire body 10 is stretched in a ring with a large number of supports 11 made of metal, plastic, etc., and for stability, a portion of about 1/3 of the net width from the lower end of the elastic net 2 is connected to a string 12, metal fittings, etc. Fix it with.

In this case, since the annular floats 1, 1 are made of a member having elasticity due to bending, the shape can be maintained by the elasticity, but a flexible linear body 10a is used to maintain the shape more reliably. Each annular float 1,1
Fix it together along the

Then, a rope 4 having an anchor 3 is attached to the annular float 1.

The elastic net 2 is preferably light and heavy with a specific gravity of 1 or less, and the net 2 and the linear body 10 are usually 2 m long.
length, making transportation and handling easy.

[Cultivation of aquatic plants by invention]

The present invention, which has the structure described above, transports materials to the destination and assembles them on the shores of lakes, marshes, and rivers. After assembly, it is floated on the water surface and towed to the cultivation site, and the anchor 3 is sunk and installed in the water bottom 13 as shown in the figure. Of course, after assembling the materials on the ship, it may be floated on the water surface 14 and the anchor 3 may be sunk to the bottom 13. After attaching the rope 4, the annular floats 1, 1 are floated on the water surface 14, the anchor 3 is sunk to the water bottom 13, and the net 2 is stretched between the two annular floats 1, 1. It may be fixed.

The annular floats 1, 1 and the net 2 of the cultivation facility thus installed swing up and down within the range allowed by the length of the rope 4 according to the water level and the movement of waves. Therefore, it is possible to prevent aquatic plants from being washed away from above the net 2 when the water is high or waves are rising, and from being washed away from below the net 2 when the water is low.

Since the cultivation facility is constructed by stretching the elastic net 2 around the annular float 1, the buoyancy is 1/2 and the width of the base of the float is also 1/2 compared to the double structure. The fixing force of the net 2 is insufficient, and the stability of the entire facility is low due to insufficient buoyancy, and in strong winds, the floats may rotate at the connecting part, and the fixed net 2 may tilt from the fixed part. Also, since a single layer structure has less buoyancy than a double structure, the height of the net 2 must be lowered, and there is a risk that plants will be washed away in areas with high waves. As mentioned above, since the single-layered structure is more unstable than the double-layered structure, it is difficult to tow smoothly and quickly, and it is also difficult to expand the scale of the facility.

On the other hand, in this embodiment, two annular floats 1, 1
It has a double structure in which the floats 1 and 1 are arranged concentrically, and the elastic net 2 is stretched in a ring between both floats 1 and 1, so the buoyancy is doubled and the width of the base of the float is also increased. Therefore, if the net 2 is sandwiched between the two floats 1 and 1, and both are bound and fixed, the fixing force of the net 2 will increase, and the
The double structure with two annular floats 1, 1 not only provides sufficient buoyancy, but also has two annular floats 1,
Sufficient elasticity is obtained by the synergistic effect of the elasticity of the elastic net 1 and the elasticity of the elastic net 2, so that the form of the cultivation facility can be created and its structure can be easily maintained.
The structure is stronger, improving the stability of the entire facility,
There is no risk of Net 2 tipping over even in strong winds. In addition, since the double structure has a large buoyancy, there is no need to lower the height of the net 2, and it can be made relatively high, so there is no need to worry about plants being washed out even in areas with high waves.

This double structure stabilizes the structure, which not only allows for smooth and quick towing, but also allows for expansion of the scale of the facility.

[Effect of idea]

As mentioned above, according to the present invention, not only the same effect as the facility structure of the earlier application is achieved, but also the two annular floats 1, 1 having elasticity due to bending are arranged concentrically, and the elasticity is placed between them. The elastic net 2 has a structure in which the elastic net 2 is stretched in an annular shape, and about 1/3 of the width of the net is fixed from the lower end of the elastic net 2.
Not only does the fixing force of the elastic net 2 increase, and the buoyancy is increased due to the double structure of the two annular floats 1, 1, but also the synergistic effect of the elasticity of the two annular floats 1, 1 and the elasticity of the elastic net 2. This increases the elasticity of the cultivation facility, making it easier to maintain its structure and making the entire facility much more stable, allowing the elastic net 2 to tilt even in strong wind and rain without the need for supporting materials. There is no risk that this will happen. In addition, since the double structure has a large buoyancy, there is no need to lower the height of the net 2, and it can be made relatively high, so there is no need to worry about plants being washed out even in areas with high waves.
Furthermore, the facility can not only be towed smoothly and quickly during the cultivation of aquatic plants, but also has the effect of further expanding the scale of the facility.

Furthermore, since about 1/3 of the width of the net is fixed from the lower end of the elastic net 2, there is no risk of aquatic plants flowing out from below the net 2 when the water level decreases.

[Brief explanation of the drawing]

The drawings are perspective views showing one embodiment of the present invention, and FIG. 2 is a plan view thereof. DESCRIPTION OF SYMBOLS 1... Annular float, 2... Elastic net, 3... Anchor, 4... Rope, 10... Flexible linear body for tensioning, 11... Support column, 12... String, 13... Water bottom, 14...Water surface.

Claims (1)

[Scope of utility model registration request] 2 with elasticity due to concentrically arranged flexures
An aquatic plant cultivation facility structure in which an elastic net having elasticity is stretched in an annular manner between two annular floats, and a portion of about 1/3 of the width of the net is fixed from the lower end of the elastic net.