ELECTROMAGNETICALLY OPERATED TUBE PINCH VALVE

摘要

An electromagnetically operated tube pinch valve includes a solenoid (2) which surrounds a magnetizable core (6), and a movable armature (10) is mounted for attraction to the core by electrically energizing the solenoid. A pinching device is operated by the movable armature and is adapted to locally collapse and close at least one elastic tube (18). The core (6) is erected as a central column interiorly on the bottom of a stationary cup-shaped armature (8) which encloses the solenoid (2), and the movable armature (10) is designed as a lid for the armature cup. The armature lid (10) is mounted on one end of a rod (12) which is axially movable in a central bore through the core column (6). The other end of the rod (12) extends out through the bottom of the armature cup and into a base part (16) in order to operate the pinching device (20, 22). When the solenoid (2) is current-carrying the armature lid (10) is able to fully engage the rim of the armature cup and, at the same time, the end of the core column. Optimum electromagentic conditions have thereby been provided, and a predetermined necessary tube pinching force can be generated and maintained with a minimum of electric power consumption.