| 摘要 |
A magnetically actuated pilot valve for fluid control systems which can direct a fluid pressure for operating a device or it can connect said device to drain. The magnetically actuated pilot valve includes a top and bottom section with fluid pressure entering the top section, a connection to drain extending from the bottom section, and a connection to a device to be operated enters a chamber between the two parts; an armature plate, rectangular-shaped or circular, is movable between two positions, one position closing off the fluid pressure, while the other position closes off the connection to drain; the armature plate is drawn to one position by energizing a wire coil whose magnetic flux path is connected to two pole pieces for actuation of the armature plate, while a spring means biases the armature plate to its other position when the wire coil is de-energized; one end of the armature plate is maintained close to one pole piece to minimize the air gap in the magnetic flux path for high resultant pull on the armature plate. While three connections are set forth above, the device can be used with two connections as an open-closed valve. In another modification, a magnetized armature plate can be used with a direct current supply. A U-shaped metallic member can be located on the opposite side of said armature plate from said pole pieces to aid in armature movement and for latching the armature in the dump closed position without the use of a spring means. A single pole modification is also shown.
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