US5215259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable insert burner nozzle
Assignee: Sure Alloy Steel Corp
•
Filing: 1991-08-13
•
Granted: 1993-06-01
•
Expires: 2011-08-13
Abstract
Abstract A vertically aimable tip for a pulverized coal nozzle used in the boiler areas of coal fired, steam generating facilities. The nozzle tip comprises box-like outer and inner housings which are pivotally mounted as a unit to the outlet end of a pulverized coal conduit. A box-like end housing having integral splitter plates is loosely mounted in the outer housing in conforming and contiguous abutting relationship to the inner housing to complete the pulverized coal flow path. An air flow path is defined by the spacing between the outer housing and the combination of the inner and end housings. The combination of the end housing and splitter plates is held in place by means by slots and locking keys or tabs to permit differential thermal expansion. The splitter plates are hardfaced and extend upstream into the interior of the inner housing.
Inventors
- 👤 Rickey E. Wark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:52
CPC Classifications
F; F23; F23D; F23D1/00; F23D2201/00; F23D2201/10; F23D2201/101; F23D2211/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
181 words
A projector nozzle adapted for hinged connection to the outlet end of a pulverized coal supply conduit having a longitudinal flow axis to receive and project pulverized coal into a combustion chamber comprising: an axially open outer housing having closed top, bottom and opposing side portions; an axially open inner housing having closed top, bottom and side portions and being disposed axially within and in spaced relationship to said outer housing; means for hingedly mounting said outer and inner housings as a unit on said conduit adjacent said outlet end to pass coal through said inner housing; an end housing having closed top, bottom and opposing side portions, the end housing axially open to the combustion chamber; means for mounting said end housing within and in spaced relationship with said outer housing and in essentially contiguous, flush relationship to said inner housing to constitute an axial extension thereof; and at least one splitter plate mounted between the opposite side portions of said end housing and extending axially rearwardly into said inner housing when said end housing is in said contiguous relationship.
Claim 2
Dependent Claim
181 words
A projector nozzle adapted for hinged connection to the outlet end of a pulverized coal supply conduit having a longitudinal flow axis to receive and project pulverized coal into a combustion chamber comprising: an axially open outer housing having closed top, bottom and opposing side portions; an axially open inner housing having closed top, bottom and side portions and being disposed axially within and in spaced relationship to said outer housing; means for hingedly mounting said outer and inner housings as a unit on said conduit adjacent said outlet end to pass coal through said inner housing; an end housing having closed top, bottom and opposing side portions, the end housing axially open to the combustion chamber; means for mounting said end housing within and in spaced relationship with said outer housing and in essentially contiguous, flush relationship to said inner housing to constitute an axial extension thereof; and at least one splitter plate mounted between the opposite side portions of said end housing and extending axially rearwardly into said inner housing when said end housing is in said contiguous relationship.
Claim 3
Dependent Claim
22 words
Apparatus as defined in claim 1 further including hardfacing, wear resistant material disposed over at least a portion of said splitter plate.
Claim 4
Dependent Claim
42 words
Apparatus as defined in claim 2 further including a plurality of splitter plates mounted in parallel between the opposing side portions of said end housing and extending axially rearwardly into the inner housing when said end housing is in said contiguous relationship.
Claim 5
Dependent Claim
47 words
Apparatus as defined in claim 1 wherein said means for mounting comprises a plurality of slots formed in said outer housing portions and a plurality of latch keys disposed as spacers between the said slots and said end housing and welded to at least said outer housing.
Claim 6
Dependent Claim
38 words
Apparatus as defined in claim 1 wherein said means for mounting comprises a plurality of slots formed in said outer housing portions and a plurality of locator tabs mounted on said end housing and slidable into said slots.
Claim 7
Dependent Claim
19 words
Apparatus as defined in claim 1 wherein the spacing between the inner and outer housing defines an air passage.
Claim 8
Dependent Claim
40 words
Apparatus as defined in claim further including rigid spacer means mounted on the inside surface of the bottom portion of said outer housing to receive said end housing and hold said end housing in spaced relationship to said outer housing.
Claim 9
Dependent Claim
20 words
Apparatus as defined in claim 1 wherein each of said outer and end housings tapers axially toward the discharge end.
Claim 10
Dependent Claim
45 words
Apparatus as defined in claim 1, wherein said means for mounting comprise rigid spacer means mounted on the inside surface of the bottom portion of said outer housing to receive said end housing and hold said end housing in spaced relationship to said outer housing.
Claim 11
Dependent Claim
50 words
Apparatus as defined in claim 9, wherein said means for mounting further comprise removable spacer means inserted between the top portion of the end housing and the outer housing when the end housing is secured by said rigid spacer means to further secure the end housing within the outer housing.
Claim 12
Dependent Claim
20 words
Apparatus as defined in claim 10, wherein the removable spacer means are additionally welded to at least the outer housing.
Claim 13
Dependent Claim
62 words
Apparatus as defined in claim 10, wherein the rigid spacer means comprise a plurality of support ribs on the inside surface of the bottom portion of the outer housing, the support ribs parallel to the taper of the end housing to mate essentially flush with the bottom portion of the end housing when the end housing is inserted in the outer housing.
Claim 14
Dependent Claim
34 words
Apparatus as defined in claim 12, wherein the top portion of the end housing is spaced from the top portion of the outer housing when the end housing is resting on the support ribs.
Claim 15
Dependent Claim
37 words
Apparatus as defined in claim 13, wherein the removable spacer means comprise latch keys which mate essentially flush with the top portion of the end housing and the top portion of the outer housing when inserted therebetween.
Claim 16
Dependent Claim
35 words
Apparatus as defined in claim 14, wherein said latch keys include a short axial stop abutting the discharge end of the end housing when the latch key is inserted between the outer and end housings.
Claim 17
Dependent Claim
39 words
Apparatus as defined in claim 14, wherein the latch keys include an enlarged upper abutment portion mating with slots in the outer housing to axially limit the distance the latch keys are inserted between the outer and end housings.
Claim 18
Dependent Claim
27 words
Apparatus as defined in claim 1, wherein the interior surfaces of the top, bottom and side portions of the inner housing include a layer of hardfacing material.
Claim 19
Dependent Claim
46 words
Apparatus as defined in claim 17, wherein the planes of the hard facing material on the interior surfaces of the inner housing lie above the interior surfaces of the end housing when the end housing and the inner housing are in their essentially contiguous, flush relationship.
References Cited (Backward Citations)
GB310555A
Cited
US1922348A
Cited
US2363875A
Cited
US2895435A
Cited
US3299841A
Cited
US3823875A
Cited
US4185777A
Cited
US4274343A
Cited
US4304196A
Cited
US4356975A
Cited
US4526111A
Cited
US4429644A
Cited
US4611543A
Cited
US4520739A
Cited
US4459922A
Cited
US4425855A
Cited
US4634054A
Cited
US4495874A
Cited
US4596198A
Cited
US4501204A
Cited
US4627366A
Cited
US4654001A
Cited
US4685359A
Cited
US4836772A
Cited
US4915619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |