JPH0629963Y2 - Electric screen generator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is intended to regulate the range of action of seafood such as shellfish, crustaceans, sea urchins, flounders, and rays near the seabed and in the ground where living areas exist. The present invention relates to an electric screen generator that generates an electric screen near the sea floor.

[Prior Art] Generally, when aquaculture is carried out, there is a method of forming an electric screen instead of the conventional rope as a method of preventing the invasion and escape of the seafood in and out of a predetermined aquaculture area. , This is because a plurality of electrode rows are arranged in parallel in seawater, different potentials are applied to each of the electrode rows by a power source, and an electric screen having a predetermined electric field strength is formed between the electrode rows. It is intended to block the swimming of seafood by artificial stimulation.

[Problems to be solved by the device]

In case of interruption by the electric screen described in the prior art,
It is advantageous for large-scale aquaculture farms with a wide water area, but too much for aquaculture of shellfish, crustaceans, sea urchins, flounders, rays, etc. that have living areas near the sea floor and underground. However, there is a problem in that it is not suitable for aquaculture of seafood near the seabed because it becomes large in scale and consumes too much power.

Therefore, the present invention has been made with the above points in mind, and an object thereof is to provide an electric screen generator suitable for aquaculture of seafood having a living area near the seabed and in the ground.

[Means for Solving the Problems]

To achieve the above object, in the electric screen generator of the present invention, three or more long electrodes arranged parallel to each other along the seabed and connected to each phase of the multi-phase AC power supply. And a plurality of insulating supports that support the electrodes so that the electrodes are located at the vertices of a regular polygon in a cross section orthogonal to the electrodes.

[Action]

As configured above, each electrode is supplied with polyphase AC power from a polyphase AC power supply, and in the cross section orthogonal to each electrode, the vicinity of the inside and outside of a regular polygon with each electrode as the apex. An electric screen is formed on the sea surface, and the electric screen regulates the range of motion of seafood having a living sphere near the sea floor and underground.

〔Example〕

 Examples will be described with reference to the drawings.

Example 1 First, FIGS. 1 to 3 showing Example 1 will be described.

In these drawings, (1a), (1b), and (1c) are arranged in parallel with each other along the seabed, and each of the R phase, S phase, and T phase of the three-phase AC power supply (not shown) Three long electrodes connected to terminals (r), (s), and (t), and (2) is a plurality of insulating supports made of FRP or the like. As shown in FIG. Electrode (1a) ~
The electrodes (1a) to (1c) are supported so that the electrodes (1a) to (1c) are located at the vertices of an equilateral triangle in a cross section orthogonal to (1c).

When a three-phase alternating current is supplied to each of the electrodes (1a) to (1c) by the three-phase alternating current power supply, the potential distribution in a cross section orthogonal to each of the electrodes (1a) to (1c) is shown in FIG. The one-dot chain line in the figure shows an equipotential line obtained by connecting points of equipotential. The narrower the equipotential line, the stronger the potential gradient, that is, the electric field strength, and the equipotential line interval. The electric field strength becomes weaker as is wider, and the electric screen consisting of the strong electric field strength area inside each electrode (1a) to (1c) and the weak electric field strength area near the outside is each electrode (1a) to (1c). Are formed in the vicinity of the inside and the outside of the.

Therefore, according to the first embodiment, by enclosing a predetermined aquaculture area with the electrodes (1a) to (1c), when seafood having a living sphere near the seabed approaches the electric screen, Even when the electric screen takes an evasive action and moves through the ground to approach the electric screen, the electric screen is formed in the ground as shown in FIG. It receives an electrical stimulus and takes a repellent action and cannot pass through the electric screen, and the electric screen can regulate the range of action of seafood having a living area near the seabed and in the ground. Compared to the case of the electrode array type electric screen generator, the power consumption can be significantly reduced.

Furthermore, as shown in FIG.
Even if there is some distance between (1a) to (1c) and the sea floor, the hatched area inside the two dashed lines in Fig. 3 is the area where the electric screen is formed. An electric screen can be formed in the gap between (1a) to (1c) and the sea bottom, and seafood can be prevented from passing through the gap.

Further, as described above, since the electric screen is formed in the vicinity of the inside and outside of each electrode (1a) ~ (1c), even if there is some unevenness on the seabed, each electrode according to the unevenness of the seabed.
Since it is not necessary to arrange (1a) to (1c), it suffices to transport each electrode (1a) to (1c) by ship to the installation location, throw it into the sea from the sea and let it sink to the sea floor. Each electrode in
Installation work from (1a) to (1c) can be greatly reduced.

At this time, during or after the setting of each electrode (1a) ~ (1c),
Due to the tidal current, the symmetry of the formed electric screen is maintained regardless of which electrode is located on the upper side, so that the blocking effect of the electric screen is not impaired.

Further, since the three-phase AC power supply is used, imbalance between phases can be prevented.

Example 2 Next, FIGS. 4 and 5 showing Example 2 will be described.

In these drawings, the same symbols as those in FIG. 1 indicate the same or corresponding ones, and the difference from FIG. 1 is that both ends of the three electrode rods (3) are connected to each electrode by insulating supports (2). Stick (3)
Support each electrode rod (3) so that the electrode is located at each vertex of an equilateral triangle in the cross section orthogonal to each electrode rod (3).
(4) forming and corresponding electrode rods of adjacent units (4)
(3) is connected by the flexible cable (5) to form the electrodes (1a) to (1c), and thus the electrode unit (4) is connected by the flexible cable (5). As a result, as shown in FIG. 5, the electrodes (1a) to (1c)
When carrying the ship by ship, each electrode (1a) on the ship ~
The mounting space of (1c) can be reduced.

Therefore, according to the second embodiment, the same effect as that of the first embodiment can be obtained, and the electrodes (1a) to (1c) can be obtained.
The transportation of the electrodes (1a) to (1c) by the ship for the installation of 1 can be performed more easily than in the case of the first embodiment.

In addition, in the said Example, although the case where three electrodes (1a)-(1c) was used was demonstrated, it cannot be overemphasized that four or more electrodes may be used.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

Since an electric screen can be formed near the inside and outside of each electrode, it is possible to regulate the range of action of seafood having a living sphere near the seabed and in the ground, and moreover, a conventional electrode array type electric screen. Compared to the case of the generator,
It is possible to significantly reduce power consumption, and it is possible to provide an electric screen generator suitable for aquaculture of seafood having a living area near the sea floor and in the ground. Moreover, in a cross section orthogonal to each electrode, a polyphase alternating current is passed through each electrode located at each vertex of a regular polygon, so that no matter which electrode is located above, the electric screen to be formed is formed. The symmetry is maintained, the interruption effect of the electric screen is not impaired, and the imbalance between the phases of the polyphase AC power supply can be prevented.

[Brief description of drawings]

The drawings show an embodiment of the electric screen generator of the present invention, and FIGS. 1 to 3 are perspective views of the embodiment 1, respectively.
A cross-sectional view and a side view, and FIGS. 4 and 5 are a side view and a perspective view at the time of electrode installation of the second embodiment, respectively. (1a), (1b), (1c) …… electrodes, (2) …… insulating support.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masanori Tsukahara, 1-6-14 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Hiroyuki Suyama 1-6-14, Edobori, Nishi-ku, Osaka City, Osaka Prefecture Inside Hitachi Shipbuilding Co., Ltd. (72) Inventor Seiji Otani 1-6-14 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Inside Hitachi Shipbuilding Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A plurality of three or more elongated electrodes, which are arranged parallel to each other along the seabed and are connected to each phase of a polyphase alternating current power source and through which a polyphase alternating current flows, and each of the electrodes. And a plurality of insulating supports that support the electrodes so that the electrodes are located at the vertices of a regular polygon in a cross section orthogonal to the electric screen generator.