Device for stopping flow of fluid

摘要

A device for stopping a flow of fluid in a fixed length of tube with an actuator simple in construction is provided. The stopping device is free of direct touch with the fluid inside the tube, expected not to obstruct the flow in the tube as permitted as possible at normal condition, expected to perform both detection and control with a single device, and further invulnerable to kinds of fluids. The device for stopping a flow of fluid includes a tube holder to keep a tube in looped configuration, a movable part pressing the looped configuration of the tube. Pressing of the looped configuration of the tube make a snapped bent to stop the flow of fluid passed through the tube. Putting the movable part back into place results in the tube's returning from the configuration having the bent, allowing the fluid flowing again through the tube.

主权项

1. A fluid-flow stopping device, comprising:
a length of tube being of strength enabling said tube to contain pressurized fluids flowing through said tube, while being bendable such that said tube can be bent toward itself; a tube holder configured to keep said tube in a looped conformation in which said tube is doubled over onto itself in a crossed-over portion, such as to define loop-inflow and loop-outflow directions that are substantially the same at the crossed-over portion, said tube holder therein supporting the looped tube at the crossed-over portion; and a movable part positioned along an opposing portion of said looped tube, directly opposite the crossed-over portion, said movable part being configured so as to shift the opposing portion of said looped tube diametrically toward the crossed-over portion by an extent predetermined to deform the looped conformation and form an opposed pair of fluid-flow stopping pinched bends in said tube, said movable part therein shifting the formed bends toward the tube holder, and configured so as to shift the opposing portion of said tube away from the crossed-over portion by the predetermined extent, thereby releasing the fluid-flow stopping pinched bends in said tube and restoring the looped conformation of said tube.