Patent ID: 7543797
Filing Date: 2009-06-09
Classification: F16K

Abstract:
1. A valve device, wherein valve plates are inserted between or detached from a pair of valve seats opposite to each other disposed in a flow path to open or to close the flow path, the valve device comprising: an arc shaped internal gear, formed in a frame body of the valve device; a sun gear, disposed on a center of the arc shaped internal gear; a driving shaft, connecting on the sun gear, wherein the driving shaft is capable of turning freely; a planetary component, engaged with the internal gear and the sun gear; and a pair of valve plates, disposed on both sides of the planetary component, wherein a central portion of the valve plate is embedded in the planetary component in a manner that the central portion of the valve plate spins freely, wherein by turning of the driving shaft forward and backward, the pair of the valve plates is inserted between the valve seats or detached from the valve seats to constitute an opening and a closing assembly of the flow path; a protrusion portion of the valve plates is disposed on a center of an inner side of a seal face of the pair of the valve plates in the assembly, and an inner diameter side of the planetary component is in rolling contact with the protrusion portion of the valve plates, such that a turning driving force of the planetary component, used as a tightening force of the valve plates, is transmitted to the pair of valve seats, and the pair of valve plates moves towards the pair of valve seats, and the valve seats tilt towards a moving direction of the valve plates.