Four trolley ring crane

Abstract

The invention discloses a four-trolley loop crane. The four-trolley loop crane comprises a central lagging jack, double-disc-spring horizontal guide devices, horizontal wheel supports, trolley assemblies, an arch ladder, a crane span structure, reverse box type structure rotating mechanisms, a maintenance lifter, brackets fixed on safety shells, ring beam ring rails, a collecting slide ring and an electric control system, wherein the ring beam ring rail is arranged on the outer side of the crane span structure and fixed to the brackets of the safety shells; the reverse box type structure rotating mechanisms are installed on the bottoms of the four corners of the crane span structure and can operate on the ring beam ring rail; the trolley assemblies operate on a track of the upper surface of the crane span structure; the multiple horizontal wheel supports are installed on the lower portion of the crane span structure; and each horizontal wheel support is provided with one double-disc-spring horizontal guide device used for horizontal guidance. The four-trolley loop crane is large in service range and high in working efficiency, the service range of ring lifting trolleys is enlarged compared with that of original trolleys, the division range of the trolleys is more detailed, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a ring crane with four trolleys for hoisting dangerous loads in nuclear power plants. Background technique [0002] The ring cranes in the prior art are single or double trolleys, and there is no trolley running perpendicular to the main girder, resulting in a small service area; the lifting capacity is classified roughly, generally 217 / 10t, 235 / 25t, etc., and each hook is responsible for lifting the load The range is large, and when lifting small dangerous loads (below 5t), larger hooks are required for hoisting and horizontal operation of heavier trolleys, while large hooks and heavier trolleys run at low speeds and consume a lot of power , waste energy, low work efficiency, and increase the operating cost of the power station; the previous ring cranes have no common operating conditions for single or double trolleys (one of the trolleys only runs during installation and cannot drag the other trolley), only The lifting mecha...

AI Technical Summary

Problems solved by technology

[0005] According to the technical problems raised above, a four-trolley ring crane is provided, which is used to solve the problem that the existing ring crane has one or two trolleys, the service area is small, the work efficiency is low, and the trolley running drive has no single fault protection function; The horizontal guide device has no anti-throwing device, the vertical bearing capacity is small, and the safety is low; the radial size of the rotating mechanism is large, and the construction cost of the nuclear power plant is high.

Images