Title:
ELECTRIC VALVE DEVICE
Document Type and Number:
Japanese Patent JP2016133210
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To rigorously distinguish disconnection and separation of a cable due to maintenance inspection from disconnection and separation of the cable due to earthquakes, so that an emergency operation is implemented and further a maintenance inspection work can be executed in earthquakes.SOLUTION: Code signal transmission means 26' for transmitting one of two codes of operation and maintenance inspection to an electric valve side at constant intervals, is disposed at a control board side of an electric valve device for operating an electric valve 21, in disconnection from a control board 20. At the electric valve side, identification means 35 for distinguishing two codes is disposed. A code signal is transmitted at constant intervals, and disconnection and separation of a cable 3 due to earthquakes are detected when the signal is interrupted. On the other hand, the identification means 35 identifies a reception code, and cancels an operation of the electric valve 21 until the reception code in operation is identified, when the identified code is maintenance inspection work, thus the electric valve 21 is not operated even when removal and disconnection of the cable 3 occur in maintenance inspection work, and the maintenance inspection work can be implemented in safety.SELECTED DRAWING: Figure 1
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Inventors:
KANETAKA HIROHARU
TANAKA JOJI
MATSUNAGA HITOSHI
TANAKA JOJI
MATSUNAGA HITOSHI
Application Number:
JP2015010208A
Publication Date:
July 25, 2016
Filing Date:
January 22, 2015
Export Citation:
Assignee:
KAWADEN:KK
International Classes:
F16K35/08; F16K17/36; F16K31/04; F16K35/00
Domestic Patent References:
| JPH0278878U | 1990-06-18 | |||
| JP2013236445A | 2013-11-21 | |||
| JPH02122282U | 1990-10-05 | |||
| JP2000356277A | 2000-12-26 |
Foreign References:
| US5787917A | 1998-08-04 |
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Bunji Kamada
Yaichiro Nakatani