| 摘要 |
The present invention relates to a vortex injection device installed on an inner side of a wall of a circular water tank to form a swirl type flow of farming water stored in the circular water tank and, more specifically, to a vertical vortex injection device for a circular water tank, which vertically installs a main pipe, where long shaped main ejection holes are formed in a row to be spaced from each other at regular intervals in the height direction of the wall of the water tank and insert-installs an insert pipe, where water stream ejection holes having different numbers or different areas are formed over a regular angle range at every position corresponding to the main ejection holes of the main pipe, within the main pipe in a dual pipe form, whereas a farming water inlet pipe is connected and installed to an upper end of the insert pipe to be attachable and detachable, thereby making different shaped water stream holes, formed on the insert pipe, selectively correspond to the main ejection holes of the external side main pipe as the inner side insert pipe rotates; accordingly, regulates the swirl type flow of the farming water from the lower end side to the upper end side of the water tank wall; and at the same time, arbitrarily adjusts flow speed of the water stream forming the swirl type flow, namely the vortex, according to the kind or the density of fish input into the circular water tank, or feeding, rest or sleep time over day and night. |
