Gate valve
First Claim
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1. A gate valve comprising:
- a driving mechanism;
a valve rod for making displacement in accordance with a driving action of said driving mechanism;
a guide shaft for guiding said valve rod;
a valve disk for opening/closing a passage formed through a valve box in accordance with a displacement action of said valve rod; and
a displacement mechanism provided with a block member connected to said guide shaft, for displacing said valve disk in a direction substantially perpendicular to an axis of said valve rod, wherein;
said displacement mechanism includes a rack member connected to said valve rod, for making displacement integrally with said valve rod;
a pinion rotatably supported by said block member, for meshing with said rack member; and
a pillow member connected to said valve disk and formed with a male thread to be engaged with a female thread formed on an inner circumferential surface of said pinion.
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Abstract
A gate valve comprises a valve rod for making displacement in accordance with a driving action of a cylinder mechanism; a guide shaft for guiding the valve rod; a valve disk for opening/closing a passage in accordance with a displacement action of the valve rod; a rack connected to the valve rod, for making displacement integrally with the valve rod; a pinion rotatably supported by a casing, for meshing with the rack; and a pillow member connected to the valve disk and formed with a male thread for making engagement with a female thread formed on an inner circumferential surface of the pinion.
393 Citations
11 Claims
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1. A gate valve comprising:
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a driving mechanism;
a valve rod for making displacement in accordance with a driving action of said driving mechanism;
a guide shaft for guiding said valve rod;
a valve disk for opening/closing a passage formed through a valve box in accordance with a displacement action of said valve rod; and
a displacement mechanism provided with a block member connected to said guide shaft, for displacing said valve disk in a direction substantially perpendicular to an axis of said valve rod, wherein;
said displacement mechanism includes a rack member connected to said valve rod, for making displacement integrally with said valve rod;
a pinion rotatably supported by said block member, for meshing with said rack member; and
a pillow member connected to said valve disk and formed with a male thread to be engaged with a female thread formed on an inner circumferential surface of said pinion.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification