Double sealing valve

摘要

A double sealing valve includes a power cylinder having a driving axle, a valve body formed of a first and a second valve members, and a seal plate assembly within the valve body. Therein, the first valve member has an axle bore for the driving axle to pass through, and the second valve member has two valve holes oppositely disposed. The seal plate assembly has a driving frame connected to the driving axle, with plural roller assemblies disposed around the driving frame. The seal plate assembly has two seal plates disposed between two faces of the driving frame and the valve body, respectively. Each seal plate has plural driving grooves corresponding to the roller assemblies. The driving axle drives the seal plate assembly to seal the valve holes, with a sealing force produced therebetween by use of the roller assembly and the driving groove.

主权项

1. A double sealing valve, comprising:
at least a power cylinder provided with a driving axle capable of axially moving; a valve body formed of a hollow first valve member and a hollow second valve member, the first valve member having a cylinder seat for receiving the power cylinder, an axle bore disposed on the cylinder seat for the driving axle to pass through into the first valve member, the second valve member provided with two valve holes oppositely disposed thereon; a seal plate assembly disposed in the valve body and having a driving frame connected to one end of the driving axle, plural roller assemblies disposed around the driving frame, with each of the roller assemblies having a roller seat, the roller seat formed in a polygonal shape with at least three sides and having at least three corners, the roller seat axially disposed on a periphery of the driving frame by at least a roller axle; furthermore, the seal plate assembly has two seal plates, while each of the seal plates is disposed between one of the two sides of the driving frame and the valve body, respectively, and each of the seal plate is concavely provided with plural driving grooves in an amount corresponding to the amount of the roller assemblies, while two roller bearings are disposed on two corners of the roller seat of each roller assembly for contacting the corresponding driving groove, such that each of the roller bearings is allowed to slide in the corresponding driving groove.