| 摘要 |
A new and improved safety locking device for PVC ball valves and the like comprising, a housing positionable over a PVC ball valve of the type having a on/off handle rotatable about a vertical axis, the handle including a horizontal section positionable in the direction of flow of fluid within coupled pipes when in an open orientation and positionable perpendicular to the direction of flow when in a closed orientation; the housing being formed of a pair of similarly shaped mating halves, each half having a front face and a rear face with each face having a semicircular opening which, when the housing halves are coupled for operation and use, define a circular opening with a central axis coextensive with the axis of the ball valve and pipes coupled with respect thereto, each housing half also having a top face and a bottom face and an exterior side face coupling the front and rear faces but leaving open the interior face with the semicircular openings; the front and rear faces of the housing halves being sufficient in size to form a chamber for a ball valve; a hinge pivotally coupling the housing halves; a supplemental plate with an aperture on each housing half, the apertures of the plates being aligned for the receipt of a lock; a rectangular cut out formed in at least one of the front and rear faces of each housing half as an extension of the circular openings, the cut out being positioned and sized to receive the handle of the ball valve when in the open orientation but to preclude movement of the handle from one orientation to the other when the housing halves are coupled and locked.
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