| 摘要 |
FIELD: protection means. ^ SUBSTANCE: locking device comprises a casing with an inlet and outlet holes for fire-fighting composition to pass through and a spring-loaded shut-off valve with a sealing element, a fixed dome and a ball lock with starting mechanisms. The ball lock incorporates locking balls arranged in the cup-like separator seats, the separator being rigidly coupled with the dome, a control bushing arranged outside the separator and furnished with an external groove for balls and a valve sleeve with the outer groove for balls located inside the separator. The control bushing is designed to interact with the starting mechanism working elements. Every starting mechanism can incorporate a cam-like working element arranged in the casing and interacting with the control bushing. The said cam-like element has a cylindrical section coupled with the drive by a lever and resting upon the dome. ^ EFFECT: solely mechanical interaction of the device mechanisms and independent starting mechanisms to open/close the device. ^ 4 cl, 5 dwg |
