VALVE DEVICE FOR DOUBLY STRUCTURED PIPE

PROBLEM TO BE SOLVED: To ensure smooth flow of a fluid and simplify the configuration of a device to make it easy to handle by maintaining double structure in a valve box. SOLUTION: An inside valve box 2 forming an inside passage 4 and an outside valve box 3 forming an outside passage 5 are provided concentrically with each other. An inside valve body 7 is connected to a valve stem 6 for inside passage, which radially extends through the outside valve box 3 and the inside valve box 2 to rotate around its axis-line. Valve stems 10 for outside passage, which move in and out along the direction of the diameter of the outside valve box 3, are inserted into a pair of valve body storage parts 9 for the outside valve box 3, and a pair of outside valve bodies 11 for opening and closing the outside passage, are connected to the valve stems 10 for the outside passage.