The invention discloses an auxiliary support for
lap joint of
heat supply pipelines. The auxiliary support comprises a support member, a mounting base, a gas conveying channel, stop blocks and attaching pieces, wherein the inner end of the support member is in threaded connection with a
threaded rod; the outer surface of the support member is in bearing connection with a movable rod; a first rotating shaft is arranged at the outer end of the movable rod in a penetrating mode; the upper end of the movable rod is in bearing connection with the mounting base; the outer side of the lower end of the movable rod is fixedly connected to a first pull
rope; and the first pull
rope is connected to the inner side of the support member. According to the auxiliary support for
lap joint of the
heat supply pipelines, an abutting piece making contact with a
pipe fitting in advance is stressed along with automatic upward movement of the mounting base according to the height of the
pipe fitting, and then the stop blocks connected to the abutting piece are stably driven to move inwards by the corresponding pull ropes through meshing structures between the abutting piece and gears, so that the workingeffect of automatic limiting is achieved on the outer side of the
pipe fitting; and meanwhile, a third pull
rope in
butt joint with the upper end of the
pipe fitting drives the two sets of attachingpieces to synchronously move downwards, and then the working effect of secondary self-limiting on the upper end of the
pipe fitting is achieved.