Hitachi Plant Technologies, Ltd.

Babcock-Hitachi Kabushiki Kaisha

Hitachi Plant Engineering Construction Co., Ltd.

Kazuhito Nakamitsu

Shigeyoshi Kawaguchi

Tetsuya Hamakawa

Yuusuke Yoshida

Hiromi Itagaki

Shinichirou Takeshita

Yuji Yokoi

Yuuji Yokoi

Yoshimasa Kojima

Hironobu Tazawa

Shoji Shinohara

Kenshin Komatsu

Shinichiro Takeshita

Jiro Yano

Sinnichi Sagawa

Yuuichi Hayashi

A girder block lifting method, which can solve a problem that steel beams are inclined or fallen inward by lifting a heavy material, and a jack-up stage used therefor are provided. The method includes a main beam which can be provided between steel beams being targets of connection with the girder to construct a rigid frame structure, a height adjustment means (gate-shaped base) mounted on a cross beam member being parallel to the main beam and connecting other steel frames for adjusting height to the main beam, a connection beam for alternately connecting the main beam and the height adjustment means (gate-shaped base), and an auxiliary beam for connecting the connection beams. On a frame stage formed by connecting these beams, a plurality of lifting jacks are provided and a lifting sling is hung from upper part of the steel beam to enable jack-up of the girder block.

Girder block lifting method and jack-up stage used therefor

The floor, which became a block, can easily be attached to the designated floor position, so that the reduction of both the construction cost and the construction period are achieved. It is a method of building the plural floors on the part of the boiler cage part, and one floorA is built on a lifting frameput on the ground, and the floorA and the lifting frameare both jacked up by jacks. Subsequently the lifting framewhich separated the floorA is jacking down and returned to the ground. Plural floors are built for lower floor from upper floor one after another by repeating such a series of steps.

Method of building a floor for a boiler cage

A scaffold assembling of a large component for a boiler requiring inspection is not performed by a high-place work but assembled safely and in a short time. The scaffold is assembled to the large component for the boiler supported by a component supporting beam at the ground side before it is attached to a steel frame main-beam. Scaffold lifting/supporting beams interposing coil spaces of a superheaterare suspended on wireslifted down from spaces of a ceiling tube wallbeing a horizontal member of the superheater. The scaffold lifting/supporting beamsare lifted to raise little by lithe within the superheater, and scaffold components are assembled sequentially toward downward. After a required number of steps of scaffolds are assembled, the scaffold lifting/supporting beamsare coupled to the ceiling tube wallto be supported. Finally, the superheateris raised by a lifting means to install to the main-beam.

Inspection scaffold of large component for boiler and building method thereof

An interference with existing structures is prevented at a time of a lifting construction of a boiler module. When the boiler module is lifted from the ground by lifting jacks provided on a steel frame main-beam and made an install construction to the main-beam, lifting jacks enabled to move laterally on the main-beam are disposed at forward and backward thereof to suspend the boiler module. The suspended module is lifted up to the main-beam and installed while changing a suspending position between an interference preventing position with existing modules and a prescribed suspending position by alternately moving the forward and backward lifting jacks laterally.

Lifting construction method and raising/lowering equipment of boiler module

Growing community of inventors

Chiyoda-ku, Japan

Kazuhito Nakamitsu