Slurry gate valve
First Claim
1. A gate valve for selectively controlling fluid flow through a pipeline comprising:
- a valve housing with an inlet fluid passageway and an outlet fluid passageway;
a gate assembly intermediate said inlet fluid passageway and said outlet fluid passageway for selectively interrupting fluid flow from said inlet to said outlet, said gate assembly including at least two interconnected gates mounted along a common plane for sequential linear movement along said common plane, said at least two interconnected gates linearly sequentially movable within said housing to selectively control fluid flow from said inlet fluid passageway to said outlet fluid passageway; and
means for manipulating said gate assembly within said housing to selectively control fluid flow.
3 Assignments
0 Petitions
Accused Products
Abstract
A slurry gate valve incorporating dual gates for the positive interruption of fluid flow through a pipeline associated with the valve. The dual gate valve is movable through three positions: a fully open position, a half open position, and a full closed position. The valve includes a main leader gate and a follower gate each having selectively alignable fluid passageways. An interlock mechanism selectively connects the dual gates for simultaneous travel once the gates have reached the half open position. The dual action gate valve reduces wear on the downstream resilient seals associated with the valve by shielding the seal against the fluid flow through the main passageway of the valve.
18 Citations
20 Claims
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1. A gate valve for selectively controlling fluid flow through a pipeline comprising:
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a valve housing with an inlet fluid passageway and an outlet fluid passageway; a gate assembly intermediate said inlet fluid passageway and said outlet fluid passageway for selectively interrupting fluid flow from said inlet to said outlet, said gate assembly including at least two interconnected gates mounted along a common plane for sequential linear movement along said common plane, said at least two interconnected gates linearly sequentially movable within said housing to selectively control fluid flow from said inlet fluid passageway to said outlet fluid passageway; and means for manipulating said gate assembly within said housing to selectively control fluid flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A gate valve for selectively controlling fluid flow through a pipeline comprising:
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a valve housing with inlet and outlet fluid passageways having flanges for connection within the pipeline, said inlet and outlet fluid passageways including seals seated therein; a gate assembly movably disposed within said valve housing intermediate said inlet fluid passageway and said outlet fluid passageway in sealing contact with said seals for selectively interrupting fluid flow from said inlet to said outlet, said gate assembly including a lead gate and a follower gate mounted in flush contact along said common plane, said lead gate and follower gate interconnected for sequential linear movement within said housing to selectively control fluid flow from said inlet fluid passageway to said outlet fluid passageway; and means for manipulating said gate assembly within said housing to selectively control fluid flow, said means connected to said lead gate. - View Dependent Claims (11, 12, 13, 14)
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15. In a gate valve including a valve housing having axially aligned inlet and outlet fluid passageways for connection within a fluid pipeline, a gate assembly movably disposed within the housing intermediate the inlet and outlet fluid passageways and sealingly engaging seals seated within said fluid passageways, and means for manipulating the gate assembly to selectively control fluid flow through the gate valve and the fluid pipeline, the improvement comprising:
said gate assembly including a lead gate connected to said manipulating means, a follower gate in flush engagement with said lead gate, and an interlock mechanism selectively interconnecting said lead and follower gates, said interlock mechanism mounted within one of said follower and lead gates and including a retractable chuck selectively engaging another of said follower and lead gates for simultaneous movement and a spring-biased block for driving said chuck against said other of said follower and lead gates, said lead and follower gates including throughbores selectively alignable with the inlet and outlet passageways, said gate assembly selectively movable between a first open position with said throughbores of said lead and follower gates aligned with the passageways and said interlock mechanism disengaged, a second position with said throughbore of said lead gate out of alignment with the passageway whereupon said interlock mechanism engages, and a third closed position with throughbores of both said lead and follower gates out of alignment with the passageways to prevent fluid flow through the gate valve, whereby said follower gate shields a downstream seal of the outlets fluid passageways from the fluid flow through the gate valve. - View Dependent Claims (16)
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17. A gate valve for selectively controlling fluid flow through a pipeline comprising:
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a valve housing with an inlet fluid passageway and an outlet fluid passageway; a gate assembly intermediate said inlet fluid passageway and said outlet fluid passageway for selectively interrupting fluid flow from said inlet to said outlet, said gate assembly including a lead gate and a follower gate interconnected for sequential linear movement within said housing to selectively control fluid flow, said gates selectively interconnected for simultaneous linear movement by an interlock mechanism disposed within said follower gate, said interlock mechanism including a retractable chuck selectively engaging said lead gate for simultaneous movement and a spring-biased block for driving said chuck against said lead gate; and means for manipulating said gate assembly within said housing to selectively control fluid flow. - View Dependent Claims (18, 19, 20)
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Specification