Gear-rack bolt lifting system and lifting method thereof

Abstract

The invention discloses a gear-rack bolt lifting system and a lifting method thereof. The gear-rack bolt lifting system is arranged on a pile leg in a sleeving way, and comprises a moving ring beam, alifting rack, a lifting unit, a lifting foundation and a bolt mechanism, wherein the lifting foundation is arranged on a deck of an offshore platform; the lifting unit is arranged on the lifting foundation; the bottom end of the lifting rack penetrates through the lifting foundation; and the lifting rack meshes with a lifting gear. The intermittent lifting of the offshore platform is realized; and compared with a hydraulic bolt lifting system, the average lifting speed is faster, the gear-rack bolt lifting system is stable and reliable, the use of a lifting oil cylinder easy to leak and difficult to maintain is avoided, the lifting efficiency is high, and the average lifting speed can reach to 30m / h. The lifting rack is arranged on the bottom part of the moving ring beam, and no pile fixing chamber and a fixed ring beam is needed to be used, so that the structure is simplified, the cost is greatly saved, and the lifting difficulty is reduced.

Description

technical field [0001] The invention relates to the field of offshore platform lifting equipment, in particular to a rack and pinion lifting system and a lifting method thereof. Background technique [0002] All offshore work platforms need to use a lifting mechanism to drive the legs of the platform to move up and down to realize the lifting of the offshore work platform. The hydraulic bolt lifting system currently used is mainly composed of a pile-fixing room, a fixed ring beam connected to the pile-fixing room, a moving ring beam, and an oil cylinder connected between the fixed ring beam and the moving ring beam. The lifting movement relies on the pins of the legs on the fixed ring beam and the moving ring beam to be alternately plugged in and out to change steps to achieve single-step movement, but the speed is slow, and the oil cylinder leaks during long-term use, making it difficult to replace and maintain later. In addition, the joint use of the pile fixing room, the...

AI Technical Summary

Problems solved by technology

The hydraulic bolt lifting system currently used is mainly composed of a pile-fixing room, a fixed ring beam connected to the pile-fixing room, a moving ring beam, and an oil cylinder connected between the fixed ring beam and the moving ring beam. The lifting movement relies on the alternate plugging and unplugging of the pins on the fixed ring beam and the moving ring beam to change steps, realizing single stepping movement, the speed is slow, and the oil cylinder leaks during long-term use, making it difficult to replace and maintain later

In addition, the joint use of the pile fixing room, the fixed ring beam and the moving ring beam is required, and the control is difficult and the manufacturing cost is high. collision

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