Drain valve for water conservancy project

The drain valve comprises a valve body, a cavity and a water passing cavity located below the cavity are formed in the valve body, a water inlet is formed in the left side of the water passing cavity, a water outlet is formed in the right upper side of the water passing cavity, a water passing hole is formed in the inner wall of the top of the water passing cavity, and the water passing cavity is communicated with the interior of the water outlet through the water passing hole. A valve element is movably installed in the water passing cavity and matched with the water passing hole, a valve rod is fixedly connected to the top of the valve element, and the top of the valve rod penetrates through the water outlet and extends into the cavity. According to the drainage valve, the water flow of the drainage valve can be conveniently and rapidly adjusted, people can adjust and use the drainage valve according to the actual water flow, the tension spring can always generate the tension effect, the external thread on