DIRECT-ACTION-TYPE ELECTRICALLY-OPERATED VALVE AND ASSEMBLY METHOD THEREFOR

摘要

A direct-action-type electrically-operated valve comprises a valve base provided with a valve cavity, a motor disposed on the upper end the valve base, and a screw rod. The screw rod is fitted and connected to a nut by means of threads. The nut is connected to a spool. Axial positions of a rotor of the motor and the valve base are relatively fixed. The upper end of the screw rod is fixedly connected to the rotor. Driven by the nut, the spool moves along the axial direction of the valve cavity to open or close a valve opening disposed on the valve base. The spool is a tubular structure provided with a balancing channel, and a seal piece for dividing the valve cavity into two independent cavities is disposed on the periphery of the spool.

主权项

1. A direct-acting electric valve, comprising a valve seat provided with a valve cavity, a motor arranged at an upper end of the valve seat, and a screw rod, wherein the screw rod is cooperated with and connected to a nut by means of screw threads, the nut is connected to a valve core, wherein axial positions of a rotor of the motor and the valve seat are fixed with respect to each other, and an upper end of the screw rod is fixedly connected to the rotor, and the valve core is movable in an axial direction of the valve cavity as the nut moves, so as to open or close the valve port arranged on the valve seat, the valve core is a column structure with an balancing passage, and a sealing member, which separates the valve cavity into two independent cavities, is provided outside an circumferential surface of the valve core.