Heat transfer tube unit combined plug-in hard-wired device

The invention provides a heat transfer tube unit combined plug-in hard-wired device, mainly comprising a central spindle, a connection buckle, a stop ball head and a rivet, wherein the connection buckle is provided with three radially rectangular through holes and a through hole; the inner diameter of the through is slightly greater than the outer diameter of a central spindle; the stop ball headis provided with a stop ball head through hole; the inner diameter of the stop ball head through hole is slightly greater than the outer diameter of the central spindle; a threaded hole is arranged at one side perpendicular to the stop ball head through hole; the stop ball head is fixed on the central spindle through a screw; and two hard-wired central spindles are connected together through the connection buckle and the stop ball head in installation. According to the heat transfer tube unit combined plug-in hard-wired device, the hard-wired rotor can be suspended in the heat transfer tubes well so as to avoid the phenomenon that the rotor scrapes the tube walls due to swing of the central spindle in the running process; the stop ball head is spherical to reduce the increased water resistance; and the two hard-wired sections can be quickly disassembled by using the connection buckle and the stop ball head, thus improving the plug-in installation efficiency on the site.