Opening/closing device

Details Opening/closing device Opening/closing device

E - Fixed Constructions

03

F

E03F 9/00 (2006.01) E02B 7/40 (2006.01) E02B 8/02 (2006.01) E03F 7/02 (2006.01)

Patent

CA 2751408

An opening/closing device 1 includes a gate 10 that receives a flow of a sewage W, and can fall toward a downstream side of the flow, a fall prevention unit 20b that prevents the gate 10 from falling by supporting the gate 10, a support release unit 22b that releases the support for the gate 10 by the fall prevention unit 20b, a first float 18 that is arranged on the upstream side of the gate 10, and is smaller in specific gravity than the sewage W, a surfacing prevention unit 44 that prevents the first float 18 from surfacing, a second float 16 that is arranged on the upstream side of the gate 10, is arranged above the first float 18, and is smaller in specific gravity than the fluid, and a surfacing-prevention release unit 42 that releases, resulting from surfacing of the second float 16, the prevention of the surfacing of the first float 18 by the surfacing prevention unit 44. Further, the support release unit 22b is activated resulting from surfacing of the first float 18.

La présente invention concerne un dispositif d'ouverture-fermeture (1) comprenant : une porte (10) qui peut intercepter le flux d'eaux usées (W) et retomber dans le sens aval du flux; une section anti-retombée (20b) qui sert de support à la porte (10) pour lui éviter de retomber; une section de relâchement de support (22b) qui relâche le support de la porte (10) assuré par la section anti-retombée (20b); un premier flotteur (18) qui est disposé en amont de la porte (10) et présente une densité inférieure à celle des eaux usées (W); une section anti-remontée (44) qui empêche le premier flotteur (18) de remonter; un second flotteur (16) qui est disposé en amont de la porte (10) et au-dessus du premier flotteur (18) et présente une densité inférieure à celle du fluide; et une section de relâchement (42) qui, lorsque le second flotteur (16) remonte, relâche le mécanisme anti-remontée du premier flotteur (18) assuré par la section anti-remontée (44). Lorsque le premier flotteur (18) remonte, la section de relâchement de support (22b) est activée.

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