2results about How to "Avoid lateral instability" patented technology

The present application belongs to the field of bridge girder erection machine overpass technology, and discloses an auxiliary device and a method for realizing small-radius curve overpass of a bridge girder erection machine by using the auxiliary device. The auxiliary device comprises a hanger wheel assembly, a connecting frame, a plurality of limiting mechanisms and an adjusting assembly. The hanger wheel assembly is arranged to roll on the main beam of the bridge girder erection machine. The hanger wheel assembly is connected to the connecting frame, and the connecting frame is arranged on the walking mechanism. The limiting mechanism is connected to the connecting frame, and the limiting mechanism is arranged to be spaced apart from the main beam of the bridge girder erection machine to limit the main beam of the bridge girder erection machine in the transverse direction. The adjusting assembly comprises an adjusting pad, which is clamped between the limiting mechanism and the connecting frame. The distance between the limiting mechanism and the main beam of the bridge girder erection machine can be changed by increasing or decreasing the adjusting pad. The limiting mechanism is arranged to be spaced apart from the main beam of the bridge girder erection machine, so that the main beam of the bridge girder erection machine can be limited to avoid transverse instability and reduce damage to the outer side of the main beam. The size of the spacing can be changed by increasing or decreasing the adjusting pad to realize real-time limiting and ensure safe overpass.

The utility model relates to a truss assembly jig frame, belongs to the technical field of building construction, and particularly relates to an adjustable assembly type truss assembly jig frame which comprises a base transverse rod and a truss and further comprises a base transverse rod. The supporting vertical rods are installed at the bottom of the base transverse rod through bolts in a threaded mode, and a pair of supporting vertical rods are installed on the base transverse rod in a threaded mode; the number of the lug plates is multiple, and the lug plates are arranged on the surface of the base cross rod and one side of the supporting vertical rod; the T-shaped steel plate is welded on one side of the cross rod of the base; according to the utility model, the effects of no need of welding and repeated use are achieved, and the problems that the existing jig frame design is suitable for a conventional truss, but the requirement for supporting a special-shaped structure or an ultra-large span is possibly insufficient, the adjustment depends on a gear rack system, and the locking mechanism is possibly abraded and the risk of loosening is generated due to long-term use or frequent adjustment are solved.