Jet-type circulating convection sewage discharging breeding device

The utility model discloses a jet-type circulating convection sewage discharging breeding device. The jet-type circulating convection sewage discharging breeding device comprises a water tank which is provided with a funnel-shaped bottom surface, wherein a conical supporting seat is arranged in the center of the water tank; a filter mesh which is matched with the edge opening of a sewage discharging opening of the water tank is arranged at the bottom of the supporting seat; through water inlet holes are formed in the side surface of the supporting seat; a central guide pipe is arranged at the top of the supporting seat; radial jet holes are formed in the side surface of the upper part of the center guide pipe; a reverse propeller is arranged on the inner side of the center guide pipe. Upward water flow is formed along the center guide pipe by the reverse propeller under the driving of a driving motor, and the water flow is jetted outwards through the radial jet holes in the upper part. Compensation flow is formed at the bottom of the water tank so as to drive residual feeds and excrements to converge to the center; the residual feeds and the excrements fall into the sewage drainage opening under the effect of gravity; only the center guide pipe is required to be arranged in the center, so that water body occupation is low. Therefore, the jet-type circulating convection sewage discharging breeding device has the advantages that automatic sewage collecting and discharging, low water body occupation, cost saving and effectiveness increasing, and ecology protecting can also be realized by utilizing a fluid mechanics principle without adding any biochemical agent.