Spray arm mounting structure

The utility model provides a spraying arm mounting structure, which belongs to the technical field of water tank type cleaning equipment and comprises a water tank bottom plate, an upper base, a lowerbase and a rotating arm, the upper base and the lower base are respectively through up and down, the middle part of the upper base protrudes outwards in the radial direction to form a convex edge, and the lower end surface of the convex edge is attached to the water tank bottom plate. The upper end face of the lower base is attached to the back of the water tank bottom plate, the lower end of theupper base penetrates through the water tank bottom plate, the lower end of the upper base is sleeved with the lower base and is in threaded connection with the lower base, the rotating arm is detachably installed on the upper side of the upper base, and the middle of the rotating arm extends downwards to form a water inlet end which is inserted into the upper base downwards. The utility model has the advantages that the