Patent US3841272A successfully refreshed from Google Patents.
US3841272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow distributor for a steam generator
Assignee: Siemens AG
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Filing: 1973-07-13
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Granted: 1974-10-15
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Expires: 1993-07-13
Abstract
Abstract A steam generator having a tube-sheet, a plurality of U-shaped tubes extending upwardly from the tube sheet to form a tube bundle and a perforated plate disposed generally adjacent and parallel to the tube sheet, the perforated plate being so disposed to cause feedwater to flow across the tube sheet in such a manner that a substantial quantity flows to the central portion of the hot leg portion of the tube bundle and thereby prevents premature boiling in this area.
Inventors
- 👤 H Mayer
- 👤 H Schroder
- 👤 G Schucktanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:15
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/023; F22B1/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
A steam generator which utilizes a primary fluid to vaporize feed-water to produce steam, said steam generator comprising a tubular shell, a plurality of U-shaped tubes disposed in said shell, a tube sheet into which the tube ends are fastened, said tubes being arranged to form a tube bundle having a hot Leg portion in which influent primary fluid flows and a cold leg portion downstream of the hot leg portion, and a perforated plate disposed adjacent and generally parallel to the tube sheet, said perforated plate having flow distribution openings so disposed to increase the fluid flow adjacent a central portion of said hot leg portion of the tube bundle, said flow distribution holes including at least one large opening in said perforated plate, said opening encompassing a plurality of tubes and being disposed adjacent said central portion of said hot leg portion of said tube bundle.
Claim 2
Dependent Claim
148 words
A steam generator which utilizes a primary fluid to vaporize feed-water to produce steam, said steam generator comprising a tubular shell, a plurality of U-shaped tubes disposed in said shell, a tube sheet into which the tube ends are fastened, said tubes being arranged to form a tube bundle having a hot Leg portion in which influent primary fluid flows and a cold leg portion downstream of the hot leg portion, and a perforated plate disposed adjacent and generally parallel to the tube sheet, said perforated plate having flow distribution openings so disposed to increase the fluid flow adjacent a central portion of said hot leg portion of the tube bundle, said flow distribution holes including at least one large opening in said perforated plate, said opening encompassing a plurality of tubes and being disposed adjacent said central portion of said hot leg portion of said tube bundle.
Claim 3
Dependent Claim
21 words
A steam generator as set forth in claim 1, wherein the opening encompassing a plurality of tubes is generally arcuately shaped.
Claim 4
Dependent Claim
20 words
A steam generator as set forth in claim 1, wherein the opening encompassing a plurality of tubes is generally circular.
Claim 5
Dependent Claim
29 words
A steam generator as set forth in claim 3, wherein there are a plurality of openings encircling a plurality of tubes and said openings are generally circular in shape.
Claim 6
Dependent Claim
165 words
A steam generator which utilizes a primary fluid to vaporize feed-water to produce steam, said steam generator comprising a tubular shell, a plurality of U-shaped tubes disposed in said shell, a tube sheet into which the tube ends are fastened, said tubes being arranged to form a tube bundle having a hot leg portion in which influent primary fluid flows and a cold leg portion downstream of the hot leg portion, and a perforated plate disposed adjacent and generally parallel to the tube sheet, said perforated plate having flow distribution openings so disposed to increase the fluid flow adjacent a central portion of said hot leg portion of thetube bundle, a wrapper enwrapping the tube bundle to form an annular chamber between the wrapper and the shell, said perforated plate having an outer periphery which engages said wrapper, and channel means disposed between said legs of said tube bundle, said wrapper having openings to provide fluid communication between said channel means and said annular chamber.
Claim 7
Dependent Claim
165 words
A steam generator which utilizes a primary fluid to vaporize feed-water to produce steam, said steam generator comprising a tubular shell, a plurality of U-shaped tubes disposed in said shell, a tube sheet into which the tube ends are fastened, said tubes being arranged to form a tube bundle having a hot leg portion in which influent primary fluid flows and a cold leg portion downstream of the hot leg portion, and a perforated plate disposed adjacent and generally parallel to the tube sheet, said perforated plate having flow distribution openings so disposed to increase the fluid flow adjacent a central portion of said hot leg portion of thetube bundle, a wrapper enwrapping the tube bundle to form an annular chamber between the wrapper and the shell, said perforated plate having an outer periphery which engages said wrapper, and channel means disposed between said legs of said tube bundle, said wrapper having openings to provide fluid communication between said channel means and said annular chamber.
Claim 8
Dependent Claim
78 words
A steam generator as set forth in claim 5, wherein the channel means has at least one leg portion that extends beyond said perforated plate and toward said tube sheet, said one leg portion of said channel means being adjacent said cold leg portion of the tube bundle, whereby the major portion of said fluid flowing into said channel means flows to that portion of the perforated plate associated with the hot leg portion of the tube bundle.
Claim 9
Dependent Claim
36 words
A steam generator as set forth in claim 6, wherein that portion of the perforated plate associated with the hot leg portion of the tube bundle has at least one opening encompassing a plurality of tubes.
Claim 10
Dependent Claim
31 words
A steam generator as set forth in claim 7, wherein said opening encompassing a plurality of tubes is centrally disposed with respect to said hot leg portion of said tube bundle.
Claim 11
Dependent Claim
20 words
A steam generator as set forth in claim 8, wherein said opening encompassing a plurality of tubes is arcuately shaped.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |