Direct-action-type electrically-operated valve and assembly method therefor
US10352467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2015 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | May 7, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/508
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.