| 摘要 |
FIELD: machine building. ^ SUBSTANCE: invention covers the versions of devices designed to close/open fast-operation end sector shutter built around mechanisms of shutter cover and protective case rotary devices with horizontal rotational axis and drives made up of worm gear or hydraulic cylinder, those made up of L-like posts, and without rotary device mechanism when protective case and cover are mounted on shutter branch pipe flange and removed therefrom by stationary lifting mechanism or mobile lifting machine. Note here that, in any version, protective case features diameter larger than shutter branch pipe flange outer diameter. Said flange has bosses to receive locking bolts to prevent ingress of various sediments inside branch pipe and sparkproof ledges for fitting against the stop in closing the shutter. ^ EFFECT: higher reliability. ^ 16 cl, 9 dwg
|
