ELECTRIC OPERATED VALVE

PROBLEM TO BE SOLVED: To provide an electric operated valve which can be controlled even when a cable for connecting a control board and the electric operated valve is disconnected.SOLUTION: A battery 13 for backup is arranged on an electric operated valve side B. Also, a power failure detection circuit is provided and when power failure is detected, a control circuit 15 can control an electric operated valve 11 by power of the battery 13. Furthermore, on the electric operated valve side B, switch means 14 is provided which actuates the control circuit 15 for controlling the electric operated valve to a safe opening, by disconnection of cables 16, 17 for connecting a quake sensor 12 on a control board side A and the electric operated valve 11. Thus, when an earthquake occurs, even when a signal from the quake sensor 12 is not inputted as the cables 16, 17 are disconnected, the control circuit 15 can control the electric operated valve 11, so that a safe state can be maintained.SELECTED DRAWING: Figure 1 【課題】制御盤と電動弁を接続するケーブルが断線しても電動弁を制御できるようにする。【解決手段】バックアップ用バッテリー１３を電動弁側Ｂに配置する。また、停電検出回路を設けて停電を検出すると、前記バッテリー１３の電力で制御回路１５が電動弁１１を制御できるようにする。さらに、電動弁側Ｂに、制御盤側Ａの感震装置１２と電動弁１１を接続するケーブル１６、１７の断線で、電動弁を安全な開度に制御する制御回路１５を作動するスイッチ手段１４を備える。こうすることで、地震の際に、ケーブル１６，１７が断線して感震装置１２からの信号が入力しなくなった場合でも制御回路１５が電動弁１１を制御できるため、安全状態を維持できる。【選択図】図１