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Патент USA US2120589

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Juné 14, 1938.
.
H. A. ELLIS
2,120,589
TUYERE PLATE
Filed May 16, 1934
2 Sheets-Sheet l_
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INVENTOR.
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ATTORNEY.
2
‘June 14, 1938.
H. A. ELLIS
2,120,589
TUYERE PLATE ‘
Filed may 16, 1954v
2 Sheets—Sheet 2
4
INVENTOR
QM
644/
,
ATTORNEY.
'
Patented June 14, 1938
2,129,589 '
UNITED STATES RATENT OFFICE
2,120,589
'I‘UYERE PLATE
Humphrey A. Ellis, Philadelphia, Pa.
Application May 16, 1934, Serial No. 725,950
9 Claims.
The object of the invention broadly is to provide
improvements in tuyere plates for underfed
stokers and the like.
More speci?cally, another object is to provide a
(Cl. 110-44)
that of the base sections, even tho greater ex
pense be entailed.
With this invention it is possible to provide a
base section of such weight and height as to
structure in which two or more nose or front sec
e?iciently support several front sections, thereby
tions are normally secured to a single rear or base
section, any one or more of such front sections
increasing the stability of the'unit and the use of
many relatively thin front sections with even
fewer relatively thick base sections, and conse
being removable from and replaceable with re
spect to a given base section, without necessitat
1 O ing the dislodgement, disconnection, or other dis
turbance of said base section.
A further object is to provide still more speci?
cally the combination of a plate unit comprising
a relatively heavy and inexpensive base section,
15 with two or more front sections formed of rela
tively lighter weight and more expensive heat
resisting alloy, each front section being char
acterized by pairs of zig-zag air channels, the
outermost discharge portions of the channels of
20 each pair operating to direct impinging jets of
air from the plate section, until the edge portions
of the said section disintegrate or burn away
su?ciently to destroy such discharge portions,
quently less danger of dislodgement of the former
during normal operation of the stoker, together 10
with relatively wide laterally directed channels
operative to direct a greater cross sectional vol
ume of air at decreased speed or rate of flow,
thru the deeper coal body normally above and in
front of the side of tuyére plate units.
15
Fig. 1 is a bottom plan view of a tuyere plate
unit comprising one embodiment of the invention;
Fig. 2 is a side elevation of one such unit, upon
which is superimposed the forward portion of a
second such unit, the second being partially .20
broken away to show one of the means whereby '
one unit interengages the other;
Fig. 3 is a central longitudinal vertical section
after which the next adjacent portions of the
25 neighboring channels of adjacent pairs cooperate
thru the unit of Fig. 1;
to function as similar impinging air jets for the
fuel upon the superposed series of tuyere plates,
thereby making possible the use of each front
section for thelongest period of time correspond
30 ing with the usable life of the casting, while it
of Fig. 1;
disintegrates, without losing or materially impair
ing the improved method of air discharge.
Still another object is to provide a construc
tion, which insures a properly distributed air
35 supply by means of a maximum of positively ,di
rected pairs of impinging jets. These jets being
located in a multiple manner at the front where
the ?re bed offers the least resistance, the side
jets being of the full height and size to produce
40 greater air flow to supply suiiicient air in the gap
between each row, where a greater air volume is
required to equalize the distribution, also to pro
vide the highest possible degree of turbulent air
supply at all of the points of air discharge as
4 01
compared to the usual straight ?ow, which latter
tends to result in spotty holes in the ?re bed.
The resulting ?re bed upon a superposed series
of these improved tuyere plates produces a much
_
higher degree of heat, which is so intense as to
cause the front section to gradually burn, blister,
scale, crack, or otherwise wear away, in View of
which fact it becomes even more imperative that
the maintenance cost be minimized by providing
front sections of greater heat resistant metal than
Fig. 4 is a fragmentary section on the line 4-—4 25
‘
Fig. 5 is a bottom plan view of the upper of
the front or nose sections of the tuyere plate unit;
Fig. 6 is a similar view of a fragmentary por
tion of the same, showing approximately the 30
shape of its exposed forward edges, as the ad
jacent portion of said section distintegrates under
the in?uence of the intense heat of the fire nor
mally adjacent thereto; and
Fig. 7 is a side elevation of a pair of these tuyere 35
plate units one above the other, but the upper
unit being tilted with respect to the lower to in
dicate their relative positions, when it is desired
to withdraw one or more of the plurality of front
sections of the lower of such units.
40
Referring to the drawings, it is to be understood
that either two or any greater number of nose or
front sections for disposition in the ?re-bed may
be supplied with a given rear or body section to
form a tuyere unit, and that the following de- 45
scription of but two such nose or front sections
for a tuyere unit is merely illustrative of the
general construction, operation and interlocking
manner of any desired plural number of such
nose or front sections, both with respect to one 50
another or with respect to the supporting base
section.
Each rear or base plate section comprises a cen
tral ‘substantially planular portion l, which is in
general rectangular, with a substantially square- 55
2
2,120,589
cut rear edge portion 2, bevelled upon its under
side and adjacent to which said plate is pro
vided with preferably two or more apertures 3,
for a purpose hereinafter described. The lateral
ly opposite edge portions of said plate are pro
vided with depending ?anges 4, the adjacent for
war-d surfaces 5 of which are bevelled outward
tioned abbreviated studs 28, adapted to extend
downwardly and engage within correspondingly
positioned apertures in the upper front section
of the tuyére plate unit positioned next there
beneath, and represented in the drawings by the
apertures 29 in the upper front section l3. By
ly to form in each case one side of a laterally
this construction each tuyere base section is se
cured against lateral movement with respect to
angularly directed channel 6, the opposite side of
which channel is de?ned by the substantially
parallel surface ‘I of a depending stud, lug, or
the corresponding section next therebeneath,
while thru the medium of the series of pins 24 and 10
lugs 26 and 28, the front sections of each tuyere
post 8, the laterally opposite and outwardly di
plate unit are ?rst secured to bases of a super
rected surface 9 of which post forms one side of
a second channel II}, which latter is con?ned by
posed series of units and to other adjacent front
15 surfaces ll , ll’ upon the adjacent sides of a pair
spect to the units adjacent thereto, above and
below the unit under consideration.
of normally vertically aligned posts l2, l2’, car
ried respectively by upper and lower detachable
front sections l3, [3’, respectively, as hereinafter
described. Substantially the central portion of
20 each plate I is provided with a depending post
l4, having a transversely reduced extension l5,
sections both above and below and also with re
Each of said front sections comprises a for
wardly directed convex edge surface 3|] of suitable
cross section, which from long experience is well
known in the art as gradually burning away or 20
deteriorating under the action of the intense heat
providing one or more shoulders I6 and adapted
to normally ?t and engage the sides of an elon
of the ?re adjacent thereto, in such irregular
shapes as those represented by the secondary
gated aperture ll of the tuyere plate next below
outlines 3i and 32 of Fig. 6. The under surfaces
of the front sections are substantially similar to 25
one another, so that only one will be described in
detail, and the same reference numerals where
applicable are applied to the other, the upper
front section of a normal pair being shown in
Fig 5, while the lower front section is exposed to 30
view in Fig. 1.
Spaced about the periphery and carried as in
tegral extensions downwardly from the lower sur
face of such front sections, is a series of spaced
25 the one under consideration, and with which such
aperture each tuyere plate base section is pro
vided. Each of the posts I4 is preferably rein
forced with respect to its supporting plate I by
means of a plurality of diagonally extending por
30 tions l8, integrally connected with both post and
plate, and it will also be noted that the shoulders
[6 are in a plane common with that of the lower
most surfaces [9 of the lateral ?anges 4, so as to
rest uniformly upon the tuyere plate next be
35 neath, unless the upper surface of the latter is
other than planular, in which case the relative
extension or positions of said shoulders and ?ange
channel-forming lugs 33 and intervening lugs 35
34 of different shape from said ?rst set, the ad
vide similar supporting ability.
jacent yet spaced surfaces of each pair of said
lugs 33 and 34 cooperating to form substantially
Z-shaped channels 35, the outermost portions of
While as above pointed out it is to be under
stood that for each base section I there may be
two or more front sections, only a pair of such
sections l3 and 13' will be here described in de
each pair of which channels are directed towards 40
each other, so that air or other gas passing there
thru emerges therefrom in such a manner that
the current from one channel of a pair impinges
surfaces are altered accordingly, in order to pro
tail, since beyond these two cooperating sections
any additional number would comprise substan
tially mere duplication or multiplication of those
here mentioned speci?cally. Accordingly, the
normally forward edge of the plate I is pro
vided with one or more ?anges or lugs 20, of any
desired shape and transverse width, in order to
provide aligning means upon or against which
normally rests the rear edge portion 2| of the
upper front section l3, thereby limiting the rela
tive downward movement of this front section
with respect to said plate, while relative trans
verse movement of said sections may be prevented
by providing either of said sections, in this in
stance the plate section itself, with an offset 22,
adapted to. register with correspondingly shaped
00 recesses 23, in the adjacent edge portion of said
front section.
This upper front section I3 is ad
ditionally provided with an integrally connected,
centrally positioned, and downwardly extending
pin 24, of sufficient length to extend downwardly
05 past and beneath the lower positioned front sec
tion l3’ and into the correspondingly shaped ap
erture 25 in the central forwardportion of the
tuyére plate next therebeneath. The said upper
front section is also provided preferably with two
or more integral downwardly extending lugs or
studs 26, adapted to engage within, but not to
angularly against the current of the other of
such channels, with the result that a swirling mo
tion of said air is set up, as is previously described
in my Patent No. 1,990,641, issued February 12,
1935. However, it has been found advantageous
to provide these channels roughly of Z-shaped
construction, so that as the outer edge portion of 50
the front sections burns away, as for instance to
the line 3| in Fig. 6, there will remain the angu
larly directed outer sections 36 of said channels
to discharge impinging jets of air or the like.
And still further, when an additional edge por 55
tion of said front section is burned away, as for
instance to the line 32 in Fig. 6, the rearmost por
tions 31 of pairs of said Z-shaped channels will
continue to function as hereinbefore described.
With this construction, it will be noted that 60
there is provided the maximum feasible number
of channel pairs consistent with castings of this
character for directing air for the purpose of
aiding combustion into a bed of fuel upon an
inclined series of tuyére plate units, both for 65
wardly and in divergent angular directions, while
laterally of the said plates where the fuel bed is
normally deeper, air flows thereinto with much
greater volume but less force thru and from the
relative!‘7 larger channels 6 and I6 located upon 70
the laterally opposite sides of said plates, where
extend beyond correspondingly positioned aper
the heat is by no means so intense under nor
tures 21 in the rear portion of the lowermost
mal conditions of operation. Consequently, as
the radially outer edge portions of the front sec
front section 13’, said lower front section in turn
being provided with preferably similarly posi
tions are gradually and progressively destroyed, 75
3
2,120,589
and it thereupon becomes necessary to replace
said sections, either throughout or only in cer
tain instances, all that is necessary in the latter
said nose sections carrying projections cooperat
ing in pairs and with the adjacent nose sections
to form passages fed by air passing through said
case is to pry one plate unit diagonally upwardly,
as indicated in Fig. 7, so as to permit the release
space, one of said nose sections being comple
of the one or more front sections therebeneath
to said base section, and the other nose section
being attached to said ?rst nose section.
6. The combination of a tuyere plate unit, com
prising a base section and a plurality of engaged
nose sections, said base section providing in com 10
bination with an adjacent unit an air space and
laterally directed channels, said nose sections
each being provided with a series of projections
adapted to form between themselves and adja
cent nose sections divergently directed zig-zag 15
which are to be removed, after which new sec
tions of like character can be readily substituted
and operation of the stoker resumed.
10
Having thus described my invention what I
claim as new and desire to secure by Letters
Patent, is:
l. A plurality of tuyére plate units, each unit
comprising a base section, a detachable nose sec
15 tion normally adjacent thereto, a second nose
section adjacent to and engaging said ?rst nose
section, connecting means extending between said
?rst nose section and the base section of an
adjacent unit and across said second nose sec
20 tion, connecting means also carried by said ?rst
nose section and engaging said second nose sec
tion, and connecting means carried by said sec
25
channels terminating in pairs having their side
walls converging so that as the nose portions
and projections burn away, adjacent channels
of adjacent initial pairs successively provide sec
ondary pairs of similarly directed passages hav 20
ing converging’ side Walls.
ond nose section and engageable with a nose
'7. A tuyere plate unit, comprising a nose por
tion and a base portion provided with an air
section of an adjacent unit.
space, each of said portions being horizontally
2. A plurality of tuyére plate units, each unit
tion normally adjacent thereto, a second nose
section adjacent to and engaging said ?rst nose
disposed, said nose portion being at one end of 25
and relatively short with respect to the base por
tion and comprising a plurality of superposed
interlocking sections, each having passages com
section, connecting means extending between
municating with said space.
comprising a base section, a detachable nose sec
so
mentary with and normally positioned adjacent
said ?rst nose section and the base section of an
adjacent unit. connecting means also carried by
said ?rst nose section and engaging said second
nose section, and connecting means carried by
said second nose section and engageable with a
35 nose section of an adjacent unit.
3. A tuyére plate, comprising a nose portion,
provided with a series of projections adapted
to form between them and in cooperation with
an adjacent tuyere plate zig-zag channels, ad
jacent pairs of channels terminating in angularly
disposed sections comprising pairs of converg
ing passages, and as the outer portions of said
plate and projections burn away, adjacent chan
nels of adjacent initial pairs successively provid
ing secondary pairs of similarly directed converg
ing passages.
,
8. A tuyere plate unit comprising a horizontal 30
base section having an air space, superposed nose
sections separate from, each other and from said
base section stepped at their free ends and dis
posed in continuation of one end of said base
section, said nose sections being relatively short 35
with respect to the base section and disposed
substantially between the extended planes of the
top and bottom of the base section and provid
ing air outlet passages at different elevations in
communication with said space, and means for
engaging vthe base section and nose sections to
gether and to an adjacent unit for detachment
by relative tilting of the base and nose sections.
9. A tuyere plate unit comprising a horizontal
base section having an air space therein, a plu
rality of superposed engaged nose sections dis
4. The combination of a tuyere plate unit com
prising a base section and a plurality of nose
posed substantially between the extended planes
sections with an adjacent unit, said base section
50 having side walls coacting with the adjacent unit
to de?ne an air space, said side walls being trav
being in stepped relation at their free ends, said
46
of the top and bottom of the base section and
ersed by laterally directed channels, each of said
nose sections carrying projections cooperating
nose sections: providing channels at different ele
vations in communication with said space, said
nose sections being relatively short with respect
to the base section, one of said nose sections
in pairs and with the adjacent nose sections to
being ?tted to said base section throughout their
form passages fed by air passing through said
common transverse extent, and the other nose
section engaging said main section in said space
regions only, engaging means between said nose
sections, and centrally positioned means on one
of said nose sections adapted for engagement
with the base section of the adjacent unit.
00
space.
5. The combination of a tuyére plate unit com
prising a base section and a plurality of nose
sections with an adjacent unit, said base sec
tion having side walls coacting with the adjacent
unit to de?ne an air space, said side walls being
traversed by laterally directed channels, each of
HUMPHREY A. ELLIS.
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