Patent ID: 9034177
Filing Date: 2015-05-19
Classification: B01D,E02B,F04B,Y10T

Abstract:
1. A drainage device for draining liquid out of a closed chamber, comprising: an air cylinder comprising a main body, the main body defining a receiving chamber, an action piston positioned in the receiving chamber of the main body, and a connecting rod connected to the action piston, wherein the main body defines a liquid inlet and a liquid outlet, the action piston forms a sealing surface attached to a sidewall of the receiving chamber, thereby separating the receiving chamber into a first chamber and a second chamber, both of the liquid inlet and the liquid outlet communicate with the first chamber; a driving assembly connected to the connecting rod; a first channel connected to the liquid inlet; a second channel connected to the liquid outlet; a first sealing assembly positioned in the first channel, the first sealing assembly comprising a fixed piston and a flexible member, the flexible member attached to a side of the fixed piston adjacent to the liquid inlet; and a second sealing assembly positioned in the second channel, the second sealing assembly comprising a fixed piston and a flexible member, the flexible member of the second sealing assembly attached to a side of the fixed piston of the second sealing assembly away from the liquid outlet; wherein the driving assembly drives the action piston to slide in the receiving chamber away from the liquid inlet, such that the liquid in the closed chamber flowing into the first chamber of the receiving chamber through the first sealing assembly and the liquid inlet, and sealed in the receiving chamber; the driving assembly drives the action piston to slide in the receiving chamber towards the liquid inlet, such that the liquid in the first chamber is discharged to the outside through the liquid outlet and the second sealing assembly via the second channel, the flexible member of the first sealing assembly is a silicone mat and configured to be pressed tightly against the fixed piston of the first sealing assembly by means of applied pressure, to enable liquid in the first chamber to be discharged to the outside via the second channel.