VALVE AND CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a technology capable of suppressing a problem that a valve unintentionally rotates from an open position to a close position and closes.SOLUTION: A stop valve 11 includes a cylindrical member 11 and a flow channel hole 13. The cylindrical member 11 is composed of the cylindrical shape rotatable on a cylindrical shaft, and mounted by being inserted to a flow channel pipe 3 in a state that a cylindrical shaft direction DR1 and a flow channel direction DR2 of the flow channel pipe 3 are orthogonal to each other. The flow channel hole 13 is a hole penetrating through a peripheral face portion of the cylindrical member 11 to be orthogonal to the cylindrical shaft direction DR1. The cylindrical member 11 can switch, by rotating on the cylindrical shaft, a first state that the flow channel is opened by bringing the penetrating direction DR3 of the flow channel hole 13 and the flow channel direction DR2 of the flow channel pipe 3 in line with each other, and a second state that the flow channel is closed by not bringing the penetrating direction DR3 and the flow channel direction DR2 in line with each other. An outer periphery of an inlet portion of the flow channel hole 13 includes an outer periphery of a connecting portion of the flow channel pipe 3 connected to the inlet portion in the first state.