Water turbine protection device based on rapid cooling

The water turbine protection device based on rapid cooling comprises a cooling plate and a water turbine shell, the cooling plate and the water turbine shell are clamped, and the cooling plate comprises a bottom plate, a first side plate, a second side plate and a speed adjusting part; the speed regulating part comprises spoilers in sliding fit with the flow channel, a first roller arranged between the two spoilers, a second roller arranged at the bottoms of the spoilers, a telescopic part for driving the spoilers to vertically move, a third roller arranged below the first roller, and a third roller arranged below the third roller, wherein the third roller sequentially penetrates through the first roller; the pull ropes are arranged on the second roller and the third roller, and the elastic piece is arranged below the spoiler. According to the device, through the arrangement of the speed adjusting part, the flow speed of cooling liquid in the flow channels can be adjusted, heat dissipation can be conducted in