PIPELINE WORK DEVICE AND INSTALLATION METHOD OF GATE VALVE

To provide a pipeline work device capable of installing a gate valve separably configured with a valve chamber and a valve lid, without much effort.SOLUTION: A pipeline work device includes a gate valve V arranged in the middle of an existing pipe accommodation part and a work device accommodation part for creating an open state and a close state by movement of a valve body 23. The gate valve V separably connects the valve chamber disposed in a space communicating with the existing pipe accommodation part and the work device accommodation part and a valve lid 22 disposed adjacent to the valve chamber in the moving direction of the valve body 23. The valve lid 22 accommodates an operation shaft 30 for moving the valve body 23 and has valve shaft sagging prevention structure for supporting an edge part, on the valve chamber side, exposed externally of the operation shaft 30.SELECTED DRAWING: Figure 8 【課題】弁箱と弁蓋とが分離自在に構成された仕切弁の設置に手間が掛からない管路作業装置を構成する。【解決手段】既設管収容部と、作業装置収容部との中間に配置され、弁体２３の移動により開放状態と閉塞状態とを作り出す仕切弁Ｖとを有している。仕切弁Ｖは、既設管収容部と作業装置収容部とに連通する空間に配置される弁箱と、弁体２３の移動方向で弁箱に隣接配置される弁蓋２２とを分離自在に連結ており、弁蓋２２は、弁体２３を移動させる操作軸３０を収容すると共に、当該操作軸３０のうち外部に露出した弁箱側の端部を支持する弁棒垂れ防止構造を有している。【選択図】図８