Pressure switch device for detecting pressure drop, comprises switching element, pressure chamber, which is connected by connection piece at working pressure source, and back actuator for resetting actuator in adjoining operating pressure

摘要

The pressure switch device comprises a switching element (71, 72) and a pressure chamber (3), which is connected by a connection piece at a working pressure source, and a back actuator for resetting an actuator (5) in adjoining operating pressure. The pressure chamber is limited by the operating pressure adjacent to a pressure-tight actuator. The switching element is arranged outside of the pressure chamber and operable over the actuator, and comprises a switching contact pair. The actuator is biased by a spring force. The pressure switch device comprises a switching element (71, 72) and a pressure chamber (3), which is connected by a connection piece at a working pressure source, and a back actuator for resetting an actuator (5) in adjoining operating pressure. The pressure chamber is limited by the operating pressure adjacent to a pressure-tight actuator. The switching element is arranged outside of the pressure chamber and operable over the actuator, and comprises a switching contact pair. The actuator is biased by a spring force so that the switching element is operable during reaching a predetermined minimum pressure value. The actuator is a diaphragm or a piston. The back actuator: is an electrically controllable back actuator; and comprises a plunger coil received in a housing (2) of the pressure switch device and a reset plunger (91), which is movably received in the housing and is guided through the plunger coil. The reset plunger comprises a solenoid plunger and a switch operating part for operating the switching element. The solenoid plunger is formed such that a part of the solenoid plunger is pulled into the plunger to reset the actuator in an electrical excitation of the plunger coil. The reset plunger is an actuator plunger mechanically cooperating with the actuator for operating the switching element. An independent claim is included for a pipeline system.