Waterproof drainage device for hydraulic engineering construction

The water conservancy project construction waterproof drainage device comprises a drainage tank, a filter screen, a lifting mechanism and a sweeping mechanism, a treatment cylinder is fixedly connected to the drainage tank, a water inlet tank is fixedly connected to the treatment cylinder, a water pump is used for pumping water into the water inlet tank, a center cylinder is fixedly connected to the interior of the treatment cylinder through a cover cylinder, and a mounting cylinder is slidably connected to the interior of the center cylinder; the device has the beneficial effects that water is pumped into the water inlet tank through the water pump, falls onto the filter screen and is filtered through the filter screen, the filtered water falls into the water drainage tank to be drained, the mounting cylinder and the filter screen are driven by the lifting mechanism to move up and down, and when the filter screen is located above the center cylinder, the filter screen is driven by the lifting mechanism to mo