Controller

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 31/122 (2006.01)

Patent

CA 2553905

A controller comprises a power transmission means (11) for amplifying a force on a working shaft (6) and transmitting it to a valve rod (4), and a slow start means (12) for slowly moving the valve rod (4) upward. The slow start means (12) comprises a piston (8) vertically movable with respect to the working shaft (6), a pressure adjusting spring (44) disposed between a pressure adjusting spring seat (43) mounted on the working shaft (6) and the piston (8), a constantly opened communication passage (47) and an auxiliary communication passage (49) which establish communication between a pressure chamber (10) and an operating gas introduction chamber (27), a flow adjusting valve (48) placed in the constantly opened communication passage (47), and an on-off valve (50) placed in the auxiliary communication passage (49) adapted to open the communication passage (49) when the piston (8) is in its lowest position and to close the communication passage (49) when the piston (8) reaches an auxiliary communication passage block position elevated by a predetermined distance above the lowest position.

Contrôleur comportant un moyen de transmission de puissance (11) pour amplifier une force sur un arbre moteur (6) et la transmettre à une tige de man.oelig.uvre (4), et un moyen de démarrage lent (12) servant à déplacer la tige de man.oelig.uvre (4) lentement vers le haut. Le moyen de démarrage lent (12) comporte un piston (8) pouvant être déplacé à la verticale par rapport à l'arbre moteur (6), un ressort de réglage de pression (44) disposé entre un patin de ressort de réglage de pression (43) monté sur l'arbre moteur (6) et le piston (8), un passage de communication constamment ouvert (47) et un passage de communication auxiliaire (49), établissant une communication entre une chambre de pression (10) et une chambre d'introduction de gaz opérationnel (27), un robinet de réglage de débit (48) placé dans le passage de communication constamment ouvert (47), et un robinet Marche/Arrêt (50) placé dans le passage de communication auxiliaire (49) et adapté pour ouvrir le passage de communication (49) lorsque le piston (8) est à sa position la plus basse et pour fermer le passage de communication (49) quand le piston (8) atteint une position auxiliaire de blocage du passage de communication rehaussée sur une distance prédéterminée au-dessus de la position la plus basse.

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