| 摘要 |
An automatic shutoff valve for shutting off the main water supply to a building in the case of detected water leak. A ball valve is provided with a mounting kit for rendering the valve automatic. The apparatus includes a housing adapted to fit over the valve body and secured directly to the pipes with adjustable clamps. The kit includes a two-section lever member pivotally mounted to the valve. The one-quarter turn movement of the lever member determines the opening and the closing of the valve. A spring-loaded cable and a system of pulleys control the lever member. A retaining member is pivotally mounted to the floor of the housing and a pair of arms extends outwardly therefrom with one arm of the retaining member engaging a slot in the upper end of the internal section of the lever member to retain the valve in the opened position. The retaining member has a second arm extending in the direction opposite to the first arm and is connected to a solenoid device which can be actuated to pivot the retaining member to disengage the slot of the lever from the latch of the retaining member allowing the extension spring to close the valve. A manual closing device is also provided to disengage the slot of the lever without the action of the solenoid device. Once the internal section of the lever is at the closed position, an indicator-switch monitors a signal confirming the closing of the valve.
|
