Protective device for hydraulic gate hoist

The utility model discloses a water conservancy gate hoist protection device which comprises a hoist body, the hoist body comprises a screw rod, a bottom plate is arranged at the bottom of the hoist body, and a protection shell is fixedly installed on the top of the bottom plate and located on the outer side of the hoist body. Two first cushion blocks are fixedly mounted at the top of the protective shell, and a water storage tank is fixedly mounted at the tops of the two first cushion blocks; through mutual cooperation of the water pump, the semiconductor chilling plate, the fan, the water outlet pipe, the temperature sensor and other components, the controller receives a signal of the temperature sensor to control the water pump to pump cooling liquid to the water outlet pipe to take away heat in the protective shell, and the fan enables air in the protective shell to circulate faster; and the semiconductor chilling plate and the heat conducting plate cool the cooling liquid after heat absorption so that th