Pipe diameter detection equipment for hydraulic engineering on-site construction pipeline

The utility model relates to the technical field of water conservancy projects, and discloses water conservancy project site construction pipeline diameter detection equipment, which comprises a fixed plate, the top of the fixed plate is fixedly connected with a base, the top of the base is fixedly connected with a motor base, the top of the base is provided with a measuring mechanism, and the measuring mechanism comprises a motor and a rotating shaft. The device comprises a base, a box body, a rotating disc, a contact rod, a baffle, a fixing sleeve and a coupler, the box body is fixedly installed at the top of the base, a first bearing is arranged on the left side of the outer wall of the box body, and one end of a rotating shaft is rotationally connected to the inner wall of the first bearing and penetrates through the box body to extend inwards. According to the measuring mechanism provided by the utility model, the motor drives the rotating shaft to rotate, so that the turntable rotates, and then the mova