Rack assembly for water tank

The utility model discloses a machine frame assembly for a water tank. The machine frame assembly comprises the water tank and a machine frame for fixing the water tank. A water inlet is formed in the top of the water tank; a connector is mounted in the water inlet; a base is arranged at the other end of the water tank; a connecting groove is formed in the base; a square groove is formed in the side, close to the connecting groove, of the rack. A rotator is detachably connected in the square groove; the rotator comprises a square block and a rotating rod; a spring seat is arranged at one end of the rotating rod; a rotating block is connected in the spring seat in a sliding manner; a first spring is fixed between the rotating block and the spring seat; when water in the water tank needs to be drained, only the rotating rod needs to be rotated, the rotating block is matched with the connecting groove, the water tank is driven to rotate, and therefore the water inlet rotates to the bottom of the water tank, wate