Double seal gate valve structure
AssigneeGeneral Electric Company
InventorDonald J. Harter
Life of this patent
Estimating the term…
Abstract
A gate valve structure is shown embodying an elongate slide member movable within an elongate housing. The slide member carries a pair of annular seals spaced apart along the length of a valve body and has a bore therein extending through the valve body at a location between the seals. By linear movement of the slide member the bore and seals are each selectively registerable with aligned openings through the housing. This valve structure has operating and maintenance characteristics, which are particularly advantageous for use in the charging and/or discharging of fixed bed coal gasifiers.
Claims27
A gate valve structure comprising:
- an elongate slide member disposed within an elongate housing therefor;
- said housing having first and second aligned openings through opposite longitudinally-extending walls of said housing;
- means attached to said slide member for moving said slide member longitudinally of said housing and controlling the flow of divided solid material through said housing via said openings;
- said slide member comprising a longitudinally-extending valve body having opposed faces, first and second annular seals spaced apart along the length of said valve body and a bore extending through said valve body at a location between said annular seals;
- said annular seals and said bore being arranged along said valve body so as to be selectively registerable with said first opening by linear movement of said slide member;
- the diameter of each of said annular seals being greater than the diameter of said first opening and
- said slide member being movable laterally in said housing whereby either of said annular seals may be selectively urged into contact with surface area around said first opening.
In an apparatus for generating a gas mixture containing combustible components wherein a sealable solid fuel supply vessel receives divided solid fuel via a first sealable valve by gravity feed, a gasifier vessel receives the solid fuel by gravity feed into the upper region thereof from said supply vessel via a second sealable valve, ash is discharged from the lower region of said gasifier vessel into a second sealable vessel via a third sealable valve and the ash is finally discharged from said second sealable vessel via a fourth sealable valve, the improvement comprising at least one of said first, second, third and fourth sealable valves being a gate valve structure, said gate valve structure comprising:
- an elongate slide member disposed with an elongate housing therefor;
- said housing having first and second aligned openings through opposite longitudinally-extending walls of said housing;
- means attached to said slide member for moving said slide member longitudinally of said housing and controlling flow through said housing via said openings;
- said slide member comprising a longitudinally-extending valve body having opposed faces, first and second annular seals spaced apart along the length of said valve body and a bore extending through said valve body at a location between said annular seals;
- said annular seals and said bore being arranged along said valve body so as to be selectively registerable with said first opening by linear movement of said slide member;
- the diameter of each of said annular seals being greater than the diameter of said first opening and
- said slide member being movable laterally in said housing whereby either of said annular seals may be selectively urged into contact with surface area around said first opening.
In an apparatus for generating a gas mixture containing combustible components wherein a gasifier vessel receives solid fuel into the upper region thereof via fuel charging means and ash is discharged from the lower region of said gasifier vessel, the discharge of ash being accomplished into a sealable vessel via a first sealable valve after which the ash is discharged from said sealable vessel via a second sealable valve, the improvement comprising having at least one of said first and second sealable valves be a gate valve structure, said gate valve structure comprising:
- an elongate slide member disposed with an elongate housing therefor;
- said housing having first and second aligned openings through opposite longitudinally-extending walls of said housing;
- means attached to said slide member for moving said slide member longitudinally of said housing and controlling flow through said housing via said openings;
- said slide member comprising a longitudinally-extending valve body having opposed faces, first and second annular seals spaced apart along the length of said valve body and a bore extending through said valve body at a location between said annular seals;
- said annular seals and said bore being arranged along said valve body so as to be selectively registerable with said first opening by linear movement of said slide member;
- the diameter of each of said annular seals being greater than the diameter of said first opening and
- said slide member being movable laterally in said housing whereby either of said annular seals may be selectively urged into contact with surface area around said first opening.
Dependencies are inferred from the claim text.