| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a gas fire extinguishing system for, preventing a secondary disaster and simplifying processes after the fire, together with making gas incombustible considering problems in the case of an accident such as a bursting of a sealing bag and invading sealing gas instantly into a target section to be repaired. SOLUTION: This gas fire extinguishing system comprises plural bags 3 and 4, a pressure detecting means 7 for detecting the pressure of the bag 3 on the side directly abutting to gas flowing in a pipe line 1 at a sealing position, a purge gas feeding means 9, a sealing jig, and a control part 8. In the control part 8, the pressure detecting means 7 is connected to its input side and the purge gas feeding means 9 and the operation part of the sealing jig are connected to the output side. The control part 8 operates the sealing jig continuously after operating the purge gas feeding means 9 to seal a shut-off section L separately from the bag when the pressure in the bag 3 is lower than the pressure for the bag 3 to be closely attached to the inner surface of the pipe line 1.</p> |
