Floating roof emergency draining system sealing valve
First Claim
Patent Images
1. A valve for a floating roof emergency drainage system for draining fluid accumulated atop said floating roof, comprising:
- a. a valve body having;
i. a top part having a cylindrical bore of first diameter,ii. a bottom part formed by a circumferential wall which extends axially downward from said top part and defines within said wall a cylindrical bore of second diameter that is generally coaxial with and greater than said first diameter, thereby defining at the junction of said top and bottom part bores a downward facing shoulder which serves as a valve seat,b. said circumferential wall of said bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of said fluid from said valve,c. a valve seal element axially movable in said bottom part bore between (i) an upper closed position where it abuts said shoulder, and (ii) a lower open position spaced axially downward from said upper closed position, andd. a spring mounted in said bottom part and constantly biasing said valve seal element toward said upper closed position,e. said valve seal element in said open position being at least partially below said fluid discharge passage in said bottom part bore, thus providing a passageway, when said valve seal element is in said open position, for fluid to flow through said top part bore, past said shoulder and to exit said valve via said fluid discharge opening.
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Abstract
A valve for a floating roof emergency drainage system for draining fluid accumulated atop the floating roof, including:
- a. a valve body having:
- i. a top part having a cylindrical bore of first diameter,
- ii. a bottom part formed by a circumferential wall which extends axially downward from the top part and defines within the wall a cylindrical bore of second diameter that is generally coaxial with and greater than the first diameter, thereby defining at the junction of the top and bottom part bores a downward facing shoulder which serves as a valve seat,
- b. the circumferential wall of the bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of the fluid from the valve,
- c. a valve seal element axially movable in the bottom part bore between (i) an upper closed position where it abuts the shoulder, and (ii) a lower open position spaced axially downward from the upper closed position, and
- d. a spring mounted in the bottom part and constantly biasing the valve seal element toward the upper closed position,
- e. the valve seal element in the open position being at least partially below the fluid discharge passage in the bottom part bore, thus providing a passageway, when the valve seal element is in the open position, for fluid to flow through the top part bore, past the shoulder and to exit the valve via the fluid discharge opening.
- a. a valve body having:
21 Citations
24 Claims
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1. A valve for a floating roof emergency drainage system for draining fluid accumulated atop said floating roof, comprising:
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a. a valve body having; i. a top part having a cylindrical bore of first diameter, ii. a bottom part formed by a circumferential wall which extends axially downward from said top part and defines within said wall a cylindrical bore of second diameter that is generally coaxial with and greater than said first diameter, thereby defining at the junction of said top and bottom part bores a downward facing shoulder which serves as a valve seat, b. said circumferential wall of said bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of said fluid from said valve, c. a valve seal element axially movable in said bottom part bore between (i) an upper closed position where it abuts said shoulder, and (ii) a lower open position spaced axially downward from said upper closed position, and d. a spring mounted in said bottom part and constantly biasing said valve seal element toward said upper closed position, e. said valve seal element in said open position being at least partially below said fluid discharge passage in said bottom part bore, thus providing a passageway, when said valve seal element is in said open position, for fluid to flow through said top part bore, past said shoulder and to exit said valve via said fluid discharge opening. - View Dependent Claims (2, 3, 4)
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5. A valve for a floating roof emergency drainage system, comprising:
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a. a valve body having; i. a top part with a downward extending bore therethrough, ii. a bottom part comprising a set of at least two legs which extend downward from said top part and are circumferentially spaced apart to define between them two transversely extending fluid discharge passages extending radially outward from said bore, said legs having facing surfaces that define a downward extending lower bore therebetween, and iii. a downward facing valve seat situated in said lower bore, c. a valve seal element axially movable in said bottom part bore between (i) an upper closed position where it abuts said valve seat, and (ii) a lower open position spaced axially downward from said upper closed position, and d. a spring mounted in said bottom part and constantly biasing said valve seal element toward said closed position, e. said valve seal element in said open position being at least partially below said fluid discharge passages in said bottom part bore. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A valve for a floating roof emergency drainage system to drain fluid accumulated atop said floating roof, comprising:
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a. a valve body having; i. a top part having a downward extending bore therethrough, and ii. a bottom part formed by a circumferential wall which extends axially downward from said top part and defines within said circumferential wall a bore that is generally coaxial with said top part bore and defines at the junction of said top and bottom part bores a downward facing shoulder which serves as a valve seat, b. said circumferential wall of said bottom part having at least one fluid discharge opening extending transversely therethrough and communicating with said bottom part bore, c. a valve seal element axially movable in said bottom part bore between (i) an upper closed position abutting said valve seat, and (ii) a lower open position spaced axially downward from said upper closed position, said valve seal element being automatically opened when a predetermined head of fluid accumulates on said floating roof above said valve, d. valve drive means carried by said valve body for automatically moving said valve seal element between said open position to said closed position after said accumulated fluid has flowed and been discharged through said valve. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A floating roof and emergency drain assembly for draining fluid accumulated atop said floating roof, comprising:
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a. a floating roof for covering the top surface of fluid in said storage tank, and b. an emergency drainage valve secured to said floating roof and adapted to discharge to a drainage duct below said valve, said valve comprising; (1) a valve body having; i. a top part having a cylindrical bore of first diameter, ii. a bottom part formed by a circumferential wall which extends axially downward from said top part and defines within said wall a cylindrical bore of second diameter that is generally coaxial with and greater than said first diameter, thereby defining at the junction of said top and bottom part bores a downward facing shoulder which serves as a valve seat, (2) said circumferential wall of said bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of said fluid from said valve, (3) a valve seal element axially movable in said bottom part bore between (i) an upper closed position where it abuts said shoulder, and (ii) a lower open position spaced axially downward from said upper closed position, and (4) a spring mounted in said bottom part and constantly biasing said valve seal element toward said upper closed position, (5) said valve seal element in said open position being at least partially below said fluid discharge passage in said bottom part bore, thus providing a passageway, when said valve seal element is in said open position, for fluid to flow through said top part bore, past said shoulder and to exit said valve via said fluid discharge opening.
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24. A liquid petroleum storage system, comprising:
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a. a storage tank having enclosing walls, a bottom, a floating roof, fluid inlet and outlet means, and b. a valve for a floating roof emergency drainage system for draining fluid accumulated atop said floating roof, comprising; a valve body having; i. a top part having a cylindrical bore of first diameter, ii. a bottom part formed by a circumferential wall which extends axially downward from said top part and defines within said wall a cylindrical bore of second diameter that is generally coaxial with and greater than said first diameter, thereby defining at the junction of said top and bottom part bores a downward facing shoulder which serves as a valve seat, c. said circumferential wall of said bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of said fluid from said valve, d. a valve seal element axially movable in said bottom part bore between (i) an upper closed position where it abuts said shoulder, and (ii) a lower open position spaced axially downward from said upper closed position, and f. a spring mounted in said bottom part and constantly biasing said valve seal element toward said upper closed position, g. said valve seal element in said open position being at least partially below said fluid discharge passage in said bottom part bore, thus providing a passageway, when said valve seal element is in said open position, for fluid to flow through said top part bore, past said shoulder and to exit said valve via said fluid discharge opening.
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Specification