Automatic breaking device for inner sealing rubber bag of piston device

The invention discloses an automatic breaking device for an inner sealing rubber bag of a piston device. The automatic breaking device is arranged at the top of a cylinder body of the piston device and comprises a through flange chuck, an umbrella-shaped wall, a breaking opening and an external connector; the umbrella-shaped wall is formed by extending downwards along the outer side surface of thebottom of the flange chuck in an inclined mode; the breaking opening is formed by vertically downwards extending from the bottom of the flange chuck; and the external connector is hermetically fastened in the flange chuck and communicates with the breaking opening, thereby realizing effective breaking and preventing blockage. 本发明公开了一种活塞装置内密封胶袋的自动破料装置，安装于活塞装置的筒体的顶部，包括：贯通的凸缘卡头；沿所述凸缘卡头的底部外侧面斜向下延伸形成的伞状壁；自所述凸缘卡头的底部竖直向下延伸形成的破拆口；密封紧固在所述凸缘卡头内，并与破拆口相通的外部连接头。从而能有效破拆和防止堵塞。