| 摘要 |
<p>PURPOSE:To dispense with any troublesome piping operations on a vacuum breaker valve as well as to contrive space-saving by installing this vacuum breaker valve, being opened or closed by discharge passage pressure, integrally in this discharge passage. CONSTITUTION:In this electromagnetic pump, a magnetic plunger is displaced against a spring at a time when a magnet coil is excited, and thereby resilience is stored in this spring for energization. In time of the magnet coil unenergized, the magnetic plunger is displaced in the opposite direction by dint of accumulative-energizing force of the spring, while a piston 15 ranging to this magnetic plunger is reciprocated, whereby a variation is given to volumetric capacity in a pump case, and at the time of expanding the capacity, an inlet valve 18 is opened, drawing a fluid thereinto, but at the time of contracting the capacity, a discharge valve 19 is opened, making this fluid flow out of a discharge passage 25. In the pump like this, a vacuum breaker valve 30 consisting of a pressure receiver 34 and a valve element 36 is installed in this discharge passage 25, and this valve 30 is opened when pressure in this passage 25 goes down, and then the fluid stored in the discharge passage 25 is made so as to be discharged out.</p> |
