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Title:
DEVICE OF PREVENTING WATER LIFE FROM ENTERING WATER-INTAKE PASSAGE
Document Type and Number:
Japanese Patent JPH04329300
Kind Code:
A
Abstract:

PURPOSE: To effectively prevent water life from entering into a water-intake passage by using an electric screen.

CONSTITUTION: Rod or plate electrodes 3 in parallel, in stages and in opposition are arranged on the wall faces 2 on both sides of a water-intake passage 1 which has a wider upper face and a narrower bottom and sectionally shaped in a reverse trapezoid to apply between pairs of opposite electrodes 3 voltage which is gradually higher toward the water surface side and lower toward the bottom. Pairs of opposite electrodes 3 are connected to a common electric screen forming power supply 6 via electric resistors using water in the water- intake passage 1 so that the electric resistors 5 can be gradually smaller in value toward the water surface side and larger toward the bottom.


Inventors:
DAIKU HIROYUKI
MAEHATA HIDEHIKO
ARAI HIROSHIGE
TSUKAHARA MASANORI
Application Number:
JP12858691A
Publication Date:
November 18, 1992
Filing Date:
April 30, 1991
Export Citation:
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Assignee:
HITACHI SHIPBUILDING ENG CO
International Classes:
A01K63/00; A01M29/00; A01M29/24; H05C1/02; (IPC1-7): A01M29/00; H05C1/02
Attorney, Agent or Firm:
Ryutaro Fujita



 
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