Quick-acting valve

H - Electricity – 01 – F

Patent

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Details

H01F 7/18 (2006.01) F16K 31/00 (2006.01)

Patent

CA 2558127

The switching valve of a quick-closing slide system is an electrically actuated stop valve. When it is necessary to effect a quick closing, the coil (19) must be de-energized in a very short period of time in order to enable the switching valve (18) to open. To this end, a voltage-dependent resistor (33) is provided between the voltage source (25) and the coil (19), this resistor having a high resistance below a switching voltage (Us) but a negligibly low resistance above the switching voltage. An auxiliary voltage source (35) is connected in parallel to the coil (19) and its voltage is inverse to that of the voltage source (25). This enables a quick-opening of the switching valve both in the event of a corresponding signal as well as a power failure.

L'invention concerne une soupape de commande de système de coulisse à fermeture rapide, qui est une soupape à coulisse à actionnement électrique. En cas de fermeture rapide requise, la bobine (19) doit être mise hors circuit en un temps très court, afin que la soupape de commande (18) puisse s'ouvrir. A cette fin, il est prévu entre la source de tension (25) et la bobine (19), une résistance (33) dépendant de la tension, qui présente, en dessous d'une tension de commande (Us), une résistance élevée, mais par contre, au-dessus de la tension de commutation, une faible résistance à caractère non significatif. Une source de tension auxiliaire (35) est commutée en parallèle à la bobine (19) et la tension de ladite source de tension auxiliaire est opposée à celle de la source de tension (25). La soupape de commande s'ouvre de ce fait rapidement, tant en cas de signal correspondant qu'en cas de panne de courant.

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