STOP VALVE APPARATUS FOR FIRE-FIGHTING EQUIPMENT, AND CONTROL VALVE OF THE SAME

摘要

PROBLEM TO BE SOLVED: To prevent a water hammer with simple structure regarding a stop valve apparatus for fire-fighting equipment such as plant disaster prevention equipment and a control valve of the same. SOLUTION: The apparatus is provided with: a valve main body 1 which connects a primary side piping 20 with a secondary side piping 30; a valve main body 5 for opening and closing the communication port of this valve main body; a piston chamber 10 opposing this main body through a primary channel 2; a piston 11 arranged in this piston chamber and connected with the valve main body; a pressurizing chamber 13 provided in the piston chamber and communicated with the connection cylinder 52 of an adjusting channel 41; a valve piston 50 inserted to a piston cylinder 53 connected with a valve chamber 53a of the adjusting channel communicated to the connection cylinder 52; a linked piston 51 opposing the valve piston 50 via a variable oil chamber 55; a reserver chamber 57 communicated with the variable oil chamber through an orifice 56; a lift 7 abutting on the pressure receiver part 51aa of the linked piston and linked with the piston in the piston chamber; and a water feeding cylinder 48 for the adjusting channel communicated with the primary side piping and having a valve seat part 46 opposing the valve piston and facing the valve chamber. COPYRIGHT: (C)2005,JPO&NCIPI