Tail water safety induction alarm

The invention discloses a tailrace safety sensing alarm. The tailrace safety sensing alarm comprises a monitoring mechanism, a driving mechanism and a mounting mechanism, the device has the beneficial effects that the sealing shell can be opened to check and sense external personnel and heat conditions, snapshot and recognition are carried out in time, an alarm is triggered, meanwhile, gas is exhausted, and the situation that the draught fan continuously discharges impurities of extracted air into the sealing shell is avoided; dust and impurities adhering to the interior of the sealing shell and the surface of the cleaning plate can be discharged, and the internal cleaning effect is guaranteed; when no personnel or related heat conditions are detected, the sealing shell is closed, and the cleaning plate in one side is attached to the surface of the induction alarm under the action of the elastic force of the elastic assembly and discharges cleaned dust, so that the situation that the monitoring effect is affe