Cantilever beam lifting mechanism used in hole passing process of lower guide beam of moving mould base

Abstract

The invention discloses a cantilever beam lifting mechanism used in a hole passing process of a lower guide beam of a moving mould base. A walking bogie is placed above a cantilever beam rail, the bottom ends of two interlocking lifting oil cylinders are arranged on a travelling crane frame, the top ends of the oil cylinders are connected to a bottom surface of a shoulder pole beam, the formed lifting system can realize the precision control and stress balance control of lifting displacement of the lower guide beam, and the shoulder pole beam and an upright post on the upper side of the travelling crane frame form a guiding and limiting mechanism through a pin groove so as to realize the lifting safety control of the lower guide beam; the lower guide beam is lifted by a deformed steel bar lifting rod, so the rigidity of the system can be improved, and the up and down vibration and circumferential swing of the lower guide beam can be reduced; the edge of an upper cover plate of the lower guide beam is reversely grabbed by a hanger beam, so that the edge does not deviate all the time, the hanger beam can slide front and back on the lower guide beam to change the position of a lifting point, and the safety and convenience demand problems of frequently moving the lifting point in the hole passing working condition of the lower guide beam are solved.

Description

technical field [0001] The invention relates to the technical field of railway construction auxiliary equipment, in particular to a cantilever beam hoisting mechanism used when a lower guide beam of a mobile formwork passes through a hole. Background technique [0002] The mobile formwork is a construction machinery and equipment for pouring concrete beams hole by hole, including the main engine and the lower guide beam. It can complete the concrete pouring of a span beam at one time, and can move longitudinally along the bridge axis. The weight of the mobile formwork main engine More than 400 tons, and the weight of the lower guide beam is more than 50 tons. [0003] The hole passing process of the lower guide beam is one of the key processes in the construction process of the mobile formwork. The common structure is that the mobile trolley above the cantilever beam of the mobile formwork is equipped with a hoisting mechanism, and the anchor point of the lower guide beam is...

AI Technical Summary

Problems solved by technology

However, since the moving distance (i.e. lifting distance) of the front leg of the lower guide beam from the pier is not long when the lower guide beam passes through the hole, if a wire rope hoisting mechanism is used for lifting and falling, the lower guide beam will easily cause up and down vibration and circumferential swing, and the hoisting anchor of the lower guide beam The points are changeable and require manual assistance, which increases the risk

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