| 摘要 |
FIELD: construction. ^ SUBSTANCE: lock of reverse head for use in pipelines draining waste waters, mainly containing faeces, comprises automatic lock driven with the help of drive operating from external energy, electric, pneumatic or hydraulic drive, and an emergency lock, which is driven independently on automatic lock. Drive of automatic lock is controlled with the help of float, which is arranged in lock of back head. Float includes magnet moving with it to provide for an option to close magnetically operated sealed switch located in reverse head lock, which is connected to drive of automatic lock. ^ EFFECT: unimpeded drain of water inrush. ^ 5 cl, 4 dwg |
