Combined variable-width bridge section double-block ballastless track construction gantry crane device

The utility model provides a combined width-variable bridge section double-block type ballastless track construction gantry crane device which comprises an upper-section concentric-square-shaped sliding seat, a lower-section concentric-square-shaped sliding seat, a first connecting seat, an adjusting sliding seat, a second connecting seat, an adjusting bolt, an adjusting nut, a first supporting vertical seat, a second supporting vertical seat, a metal bent pipe, a control box, a control button and a movable push-free bottom wheel structure. The invention discloses an anti-inclination bottom fixed supporting pull rope structure and a combined double-block type ballastless track synchronous operation elevator structure. An upper-section concentric-square-shaped sliding seat and a lower-section concentric-square-shaped sliding seat are connected to the upper portion and the lower portion of the right side of a first connecting seat through bolts in the transverse left end respectively. Due to the arrangement of