U type pipe solar vacuum heat collection tube

The utility model relates to a U type pipe solar vacuum heat collection tube, including glass inner tube and glass outer tube, the glass inner tube passes through that the support frame is coaxial to be fixed in the glass outer tube, vacuum production intermediate layer between glass inner tube and the glass outer tube, and the outer surface recombination of glass inner tube has sun selective absorbing coating, inserts U type pipe in the glass inner tube, U type outside of tubes alclad type fin, aluminium type fin contacts with the interior inside pipe wall of glass, and thermal -collecting tube one end is equipped with the end cap, the end cap is the column body, is equipped with several tube hole and exhaust hole on it, and aluminium type fin and the interior union coupling of glass are passed through to U type pipe one end, and the other end passes the tube hole and supports on the end cap, form a plurality of circular -arc archs on the glass inner tube surface. The utility model discloses both solve the low problem of the glass inner tube efficiency of light energy utilization, can improve the mechanical strength of glass inner tube simultaneously again, had characteristics such as manufacturing process is simple, solar energy high -usage, mechanical strength is high, the programming rate is fast, thermal efficiency height.