Adjustable riveting tool for top plate and water pipe of heat exchanger

The utility model discloses an adjustable riveting tool for a top plate and a water pipe of a heat exchanger, which comprises an upper template and a lower template which are oppositely arranged, the lower side of the upper template is elastically connected with a hanger plate, the middle part of the hanger plate is provided with an adjustable riveting mechanism, and the upper side of the lower template is detachably provided with a positioning mechanism; the adjustable riveting mechanism comprises a supporting and expanding main body, the supporting and expanding main body is connected with the hanging plate through a round nut spirally connected with the upper end of the supporting and expanding main body, a locking block is fixedly arranged at the lower end of the supporting and expanding main body, an expanding riveting head is arranged at the bottom in the locking block, a guide sleeve is arranged in the supporting and expanding main body, and the upper end of the guiding sleeve is fixedly connected with