PROBLEM TO BE SOLVED: To provide a swirling flow gas-liquid mixing device for aquaculture that can automatically supply oxygen and feed by a swirling flow with an ejector by one pump for water absorption, and can also remove foreign matters in water. A sliding tube provided with a floating body that always holds the water surface of a gas-liquid suction port in which a tip blade is twisted in one direction is fitted with a notch and a protrusion for preventing rotation. It fits loosely on the outer periphery of the tip of the mixing tube. The discharge port of the introduction tube is inserted into a gas-liquid mixing tube having a curved tube with a larger diameter at an appropriate position, and a plurality of swirl guide plates having a gently curved surface in the gap are axially Join by tilting in the same direction as the twist of the blade. Insert the discharge port of the gas-liquid mixing tube into one end of the gas-liquid discharge tube having a larger diameter curved tube at an appropriate position of the bottom suction port formed in a shape similar to the gas-liquid suction port, A plurality of swivel guide plates with gently curved surfaces in the insertion gap are joined to the tube axis direction in the same direction as the twist of the blades of the bottom suction port, and the air is vented to the top of the gas-liquid discharge pipe A hole 19 is provided. [Selection] Figure 1【課題】 吸水用ポンプ１台で、エゼクターと旋回流で自動的に酸素や給餌を供給でき、水中の異物除去も行える養殖用旋回流気液混合装置を提供する。【解決手段】 先端の羽根に一方向に捻りを加えた気液吸引口を常に水面を保持する浮体を備えた摺動管を、回転防止の切り欠き部と突起とを嵌合させ、気液混合管の先端外周に遊嵌する。 導入管の吐出口を、より大きな径の曲管を有する気液混合管に適宜な位置に挿入し、その空隙部に緩やかな湾曲面を有する複数枚の旋回誘導板を軸方向に対し、前記羽根の捻りと同一方向に傾斜させて接合する。気液混合管の吐出口を、より大きな径の曲管を有する気液吐出管の一端部に、気液吸引口と相似形に形設された底部吸引口の適宜な位置に挿入し、その挿入空隙部に緩やかな湾曲面を有する複数枚の旋回誘導板を、管軸方向に対して底部吸引口の羽根の捻りと同一方向に傾斜させて接合し、気液吐出管の最上部に空気抜き孔１９を設ける。【選択図】図１
