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Патент USA US2404203

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July 16, 1946-
c. F. ZlMM-ER-MANN
‘
2,404,203‘
EXHAUSTER
Filed Aug. 20, 1942
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July 16, 1946.
c. F. ZIMMERMAN'N
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EXHAUSTER
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' July 16, 1946.
c. F. ZIMMERMANN
2,404,203
EXHAUSTER
3 sheets-sheet 3
Filed' Aug. 20, 1942
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Patented July 16,}‘1946
UNITED STATES PATENT OFFICE
2,404,203
EXHAUSTER
Carl F.,Zimmerm'ann, Chicago, Ill., a'ssignor to
Aerostream Pneumatic Conveyors, -Inc., Chi
cago, 111., a corporaticnlof Illinois
Application August 20, 1942, Serial No. 455,538
. 10 Claims.
(01. 302-25)
1
2.
The present invention relates to exhausters and
an exhauster ‘of this character wherein elimina
tion of erosive wear on the steam manifold is
is particularly directed to improvements in ex
hausters of the type wherein a fluid jet such as
steam is introduced into a conduit for the purpose
of establishing a vacuum in the conduit and in
' ducing ?ow of air through the conduit to enable
the air stream to transport granular materials
held in suspension therein.
complete.
It is a further purpose of the invention to pro
vide in an exhauster of the character described a
construction wherein the nozzles which direct
steam or other fluid from the manifold into the
mixing chamber of the eXhauster are protected
Exhausters of this
‘type are generally well known as parts of con
from abrasion by the material passingthrough
veyor systems for conveying ashes and the 1ike. 10 the exnauster and are readily accessible from the
The ‘principal purpose of the present invention
exterior ofthe exhauster so that they may be
is to provide an exhauster of the character men
removed ‘and replaced without necessity for re
tioned above which when inserted in a conduit ' moving any other part of the e'xh'auster. The
may have any of the fast wearing parts replaced
invention contemplates also that the protecting
or may be changed to ?t different operating con 15 means by which the nozzles are protected from
ditions without breaking a main joint in the con
abrasion may also be readily replaced without dis
duit and without disturbing those elements such
turbing the various parts of the exhauster. ~
as the manifold and the suction chamber and ‘
It is a further purpose of the invention to pro
discharge conduit coupling ?ange that are essen
vide'in an exhauster of the character described
tially the same for all operating conditions.
20 an'improved combination of a suction chamber
In the basic design of exhausters of this char
with the manifold and mixing chamber whereby
acter the different degrees of vacuum to be estab
the ef?ciency of the exhauster as a whole is mate
lished, the steam pressure to be used, and other ' rially increased.
operating conditions often require substantial
The present invention contemplates also as an
variations in the contour, size and design of the 25 object an exhauster wherein all of the wear parts '
mixing chamber, throat and discharge tube of the
such as the tubular members making up the
exhauster proper as Well as changes in the‘ angle
suction chamber‘, the nozzle protectors, the mix
at which the steam nozzle discharges into the > ing chamber, the throat and the discharge tube
mixing chamber and changes in the interior con
struction of the nozzle itself. The present ap
constitute individual elements normally rigidly
30
paratus is particularly directed to a device
whereby such design changes may be made in the
parts above referred to without in any way'affect
ing the manifold, thesuction chamber, the dis
charge ?ange and the connecting frame members. 35
Variations in the angle. at which the nozzle is
directed into the suction chamber are‘taken care
held in place but readily replaceable while the
main joints of the conduit and the manifold re
main connectedlin their usual fashion, the ar
rangement being such that during the removal
and replacement of a part the means connect
ing the exhauster in the line of the conduit re
main to form a cradle or support for the new
part until it is clamped in place.
i
of by different nozzle housings while the mix
ing chamber, the throat and discharge tube,
The features and advantages of the invention
will appear more fully from the following descrip
which together with the suction chamber make 40 tion», reference being had to the accompanying
up that part of the exhauster called the diffuser
‘ drawings wherein a preferred form of the inven
tube, have their interior dimensions and contours
tion is shown. It should be understood however
variable without changing the overall dimensions
that the drawings and description-are illustra
and the exterior contours; The savings in manu
tive only and are not to be taken as limiting the
facture and maintenance because of the afore 45 invention except insofar as it is limited by the
mentioned features are numerous. Standard
In the drawings: '
parts for the manifold suction chamber casting,
the discharge ?ange and the frame members may
Fig. 1 is a view in side elevation of an exhauster
be employed. Also, the patterns for the other
assembly embodying my invention, certain of the
parts remain the same, it being necessary only 50 steam jet nozzles being left off for the sake of
to change the cores thereof to suit the desired
clearness, and the lower portion of the device
design. It is obvious that the quantities of mate
being broken’ away;
rial which must be carried in stock are greatly
Fig. 2 is an enlarged sectional view taken
reduced.
lengthwise through'a portion of the exhauster
It is also‘ an object of the invention to provide 55 illustrating the manifold construction and'its con
claims.
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.3
thereon to which the frame members 2| and 22
are bolted by a plurality of bolts 2'! and 28, the
bolts Z'Iserving to attach the frame member ill
to the lug 25 and the bolts 28 serving to attach
the frame member 22 to the lug 26. The frame
members 2I and 22 are constructed of steel chan
nels.
nection. in the conduit line alongwith the frame ‘
members “which serve to lock togetherptwo edges '
' of the conduit between which the exhauster is‘
inserted;
Fig. 3 is a plan view of the exhauster, certain ‘
of the nozzles being left out for the sake of clear
ness;
.
I
Asuction chamber casting, 29 which'is cyline
Fig. 4 is a fragmentary sectional view taken on
drical in cross section has a reduced portion 36
Fig. 5 is a fragmentary sectional View taken‘ 10 that slides into the manifold I2 to abut against
the conduit IE! and form a continuation thereof.
on the line 5-5 of Fig. 1;
This suction chamber casting has an enlarged
Fig. 6 is a fragmentary sectional view taken
annular portion 3! which is provided with a mul
on the line 6-45 of Fig. 1;
/
the line 4—4 of Fig. 1;
s
Fig.7 is a fragmentary sectional View takenon . .
the line 'i'—l of Fig. 1, further illustrating the
coupling of ‘a conduit to the discharge end of the ‘
exhauster ;'
‘
tiplicity of rectangular apertures 32 around the
thereof. in periphery
ly spaced and ;in
i
These apertures are uniform
thev present form there are
eight of them. The wall around each aperture
is recessed as indicated at 33 to provide a seat
Fig. 8 is a sectional view taken on the line isv-d-s ;
for a nozzle housing 34 which has a rectangular
of Fig. 3 but on an enlarged scale;
Fig. 9 is a plan view of one of the eight nozzle 20 ?ange 35 around the periphery thereof. The
nozzle housing is also a casting of a material that
housings that are embodied in the device;
Fig. '10 is a sectional view on the line |a_ic
of Fig. 9; and
Fig. 11 is a fragmentary sectional view'takenw
,onthe line II—‘II of Fig. 1. .
-
Referring now in detail to the drawings, the
‘present invention is’ embodied in an exhauster,
the purpose of which is to establish a vacuum in
' a receptacle or conduit which is connected to the
inlet side ‘of the exhauster whereby to induce a
now of air into, through and out of the receptacle
.or'conduit. The exhauster is often required'to
is designed to resist abrasion.
'
The nozzle housing is shown in’ plan View’ in
Fig. 9 and in section in Fig. 10. .The housing has .
25 a tubular portion 36 which is adapted to project
beyond the end of the suction chamber casting
into va mixing chamber 31 as illustrated in Fig. 2.
The tubular portion'36 has a cylindrical bore‘ 38 '
and the bore 38 is enlarged at 39 to receive a
packing ring 40 (see Fig. 2).
A nozzle 4| ex
tends intothe bore 38 and is connected by a cou
pling 62' to a length‘ of pipe 43 that leads to a
serve as a part of the conduit into which it is
. inserted, and the conduit is used to transport
union coupling 4d, one section of which is on the
' granular materialsiwhich are carried in suspen
pipe 45 which is threaded into one of the outlets '
sion by the air stream that is caused to ?ow
through the conduit by means of the exhauster.
This granular material of course travels through
the'exhauster.
‘
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One of the principal‘uses for devices of this
character is in the conveying of ashes. Naturally
thematerial in the ash may be highly abrasive
and it always presents a problem of replacement
of parts that become worn or damaged due to
‘
the: abrasive action of the material conveyed
‘through the exhauster. The present'exhauster
‘ .is so constructed'as to provide a highly ef?cient‘
vacuum creating and conveying device with facili
. ties whereby the abrasive action of the material i
‘ conveyed occasions a minimum amount of shut
down for replacement of parts.
Referring now to Figs. 1, 2, 3 and a. my in;
vention is shown as mounted in a conduit line
consisting of an ‘inlet section, It and a discharge '
section II. A steam manifold. I2 has one face
pipe‘ 43 and the other section of which is upon a
Ii. It will be evident from the foregoing descrip
tion that if it is desired to remove a nozzle 4|
for purposes of replacement or repair of the noz
zle or'of the nozzle housing 34 the coupling 44
is ‘loosened and the housing and nozzle can then
be removed or the nozzle itself can be removed
while the housing remains in place. The housing
protects the exterior of the nozzle from abrasion
but of course it does not protect the tipv of the
nozzle from abrasion due to the passage of steam
through it. If a different nozzle is desired due
to di?erentcharacteristics of the exhauster it
is possible to replace the present ‘nozzle without
disturbing the rest of the apparatus.v Also, new
50 ‘housings and nozzles to provide a different di
rection of jet into the mixing-chamber may be ~
applied withoutidisturbing the mountingpof the
suction chamber casting. '
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I That part of the exhauster unit that I refer
to as the diffuser tube is composed of thesuc
I3 thereof drilled to receive bolts I4 which pass‘
through a flange I5 of the conduit I0 so that the
tion chamber 29, a mixing chamber‘ casting 31,
.a throatvcasting' 6| and a vdscharge tube casting
manifold can be attached directly to the con
62.
The mixing chamber 31 is a part of the dif
fuser Wherethe steam from the nozzles 4| mixes
with the material being drawn from the conduit
Ill. This mixing ‘chamber is a casting, conical
iduit. The manifold I2 has an inlet opening I 6
and has a plurality of outlets I1, there being eight
of the outlets IT in the form of device'shown.‘
Of course the number of outlets may be changed
to suit any particular installation.
_
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in shape, with its larger end of'the same size
as ‘the .outlet end of the suction chamber. Both
The manifold I2. also has two oppositely dis
posed lugs I8 which project from its face I9 op E165 castings 29 and 31 are provided with annular
posite the conduit receiving face I3. These lugs
I8 are drilled or cored to receive two bolts 20 in
v?anges at their meeting ends.
The casting 29
' has a flange 46 thereon and the casting 31 has a
?ange 41
thereon.
These two ?anges
are
each lug, these bolts serving to attach two frame
members 2| and 22 to the manifold l2. The
‘frame members 2| and 22 extend in parallel rela-i
tion from the manifold I2 to a discharge ?ange
and 49. The split. ring section 48 is the bottom
section (see Fig. 1) and is bolted to the frame
23 which is in th'e'form of a split ring and which
members 2| and 22 by means of -a pair of bolts
clamped together by two split ring sections 48
'50 and 5! ‘passing through the frame member 22
and a pair of bolts 52 and 53 ‘passing through the
may be bolted to a ?ange IIa on the conduit'l I‘.
The discharge flange 23‘ha's two lugs .25 and 26 575 iframeplmember 2|. The showing in Fig. 2 illus
is provided with threaded holes 24 by which it‘
2,404,203
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trates the construction of the split ring 48 and
the manner in which the bolts 52 and 53 secure
it in placer The bolts 56 and 5| of course se
cure the other side of the split ring in'the same
fashion. The split ring section 49 is a duplicate
of the section 48 and the two ring sections are
6
.
corresponding shoulders provided on the sections
23a and 23b. The bolts 21 and 28 are arranged
in sets of two for each section of the ‘discharge
?ange 23 so that once the discharge flange is
clamped in place the upper pair of bolts 'canbe
applied. The lower pairs of bolts are of course
permanently used to fasten the lower half of the
discharge ?ange 23 in place.
'
provided with a packing ring 54 to seal the joint
between the two ?anges 46 and 41 on the cast
It is believed the construction of the exhauster .
ings 30 and 31. In order to clamp the two split
ring sections 48 and Y49 together I provide two 10 will be clear from the foregoing description.
The principal features and advantages lie in‘
clamping lugs 55 and 56 (see Figs. ly and 4) at
the protection of'the manifold by means of the
each of the frame members, and these lugs are
suction chamber casting, the accessibility of the
secured together by bolts 51 which pass through
nozzles and their protection by means of the
the ?anges of the frame members 2| and 22 and
which are provided with nuts '56 in order that 15 nozzle housings, and the ready access to any
section of the exhauster without disturbing the
the lugs 55 and 56 may be drawn together and
connection between the conduits l6 and II. It
in turn clamp the split ring sections together in
is believed to be evident from the foregoing de
the manner illustrated in Fig. 4. When the top
scription that the frame members 2| and 22, to
ring section 49 is clamped in place it is then per
manently fastened by means of suitable bolts 59 20 gether with the manifold l2 and the lower half T
of the discharge ?ange 23, constitute a perma
and “passing through each of the frame mem
nent and rigid connection between the conduits
bers 2| and 22 and threading into the section 49.
l0 and II. The lower half of the discharge
The small end of the mixing chamber cast
?ange 23 coupled with the lower sections 63 and
ting 3'| abuts a short cylindrical‘ casting 6| which
forms the throat of the diffuser. The inner size
of the casting BI is the same as the inner size
of the mixing chamber casting 31. The discharge
48 also provideia cradle or support for the sev
eral castings 36 and 37 and 6| and 62 so that
these castings maybe laid in place and taken '
tube casting 62 abuts the other end face of the
out and replaced with a minimum amount of
throat casting?l, the discharge casting 62 being
di?iculty.
‘
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The particular design of the suction chamber
conical in construction and increasing in di
and the diffusing tube is ‘such as to permit the
ameter from the throat casting 6! to the conduit
nozzles to be advantageously used to direct the
||. The throat casting 6| and the castings 3'!
discharge from the nozzles into the throat of the
and 62 are clamped together by means of 'two
exhauster with a minimum loss of available en
split ring sections 63 and 64 (see Figs. 1; 3 and 5).
ergy. This factor and the protection of the
The lower ring section 63 is permanently attached
nozzles aiforded by the nozzle housings tend to
to the frame members 2| and 22 by two hor
lengthen the life of the castings. H and‘ 6| which
izontally extending lugs 65 and the upper sec
bear the brunt of the abrasive action of the ma
tion 64 has similar lugs 66. The lugs 65 are bolt
terial being drawn through the exhauster.
ed to the frame members 2| and 22 by bolts 6?
In each individual installation of an exhauster
and the lugs 66 are similarly bolted to the frame 40
the factors'which determine the particular nozzle
members 2| and 22 by bolts 68. The two ring
that will be used and the particular‘ mixing cham
sections 63 and 64 are clamped together by two
her, throat and discharge tube that will be used
- bolts 69 and 16 which pass vertically through the
may be widely different from the factors ,en
lugs 65 and 66. The bolts 69 and 16 are pro
vided with nuts ‘H and "I2. A packing ring 1'3 45 countered in another installation. For example,
if a much higher vacuum must be maintained
serves to seal the joints between the castings 31
in the suction chamber, this does not require any
and 62 on the one hand and the throat casting
redesign of the suction chamber but it does re
6| on the other hand. It will be noted that the
quire changes in the nozzles, mixing chamber,
top ring section 64 can be removed by taking
off the nuts ‘H and 12 and releasing the bolts 50 throat and discharge tube.‘ With my invention
the basic parts of the exhauster, namely, the,
68. Thus it is a fairly simple matter to replace
manifold, the suction chamber casting, the dis
a throat casting 6| whenever that is desired.
charge ?ange and the frame members which con
The throat casting being at the point of smallest
nect the discharge ?ange to the manifold may
diameter in the entire exhauster is subject to
the greatest wear and therefore should be ca 55 be the same for a great variety of conditions so
long as the conduits in which the exhauster is
pable of ready replacement with a minimum
to be inserted are essentially the same in diame
amount of di?lculty. The present construction
ter. Changing conditions therefore in an in
makes such replacement possible.
stallation requiring higher or lower vacuum may
The discharge end of the discharge tube 62 is
be made by changing only those parts which
provided with an exterior rib 14 which seats
have to be changed to get the desired result,
in a corresponding recess in the discharge ?ange
namely, the mixing chamber, throat, the dis
23. I have previously described how the dis
charge tube and the nozzles and their housings.
charge ?ange 23 is in turn connected by means
It is believed to be apparent‘from the foregoing
of bolts 24a that pass through a ?ange on the
65 description that I have provided an exhauster
conduit II and are threaded into the holes 24
in the discharge ?ange. A packing ring 15 is
interposed between the end of the discharge tube
62 and the adjacent face of the conduit ||. The
two sections 23a and 23b of the discharge ?ange
23 are illustrated in Fig. 6 which also illustrates
how these two sections are clamped together.
Two bolts 16 and 11 having nuts 18 and ‘Hi
thereon pass through the ?anges of the mem
bers 22 and 2|, respectively, and serve to clamp
two sets of clamping lugs 80 and 8| against the 27-5
which is simple in construction and capable of
adaption to a great variety of conditions en
countered in individual installations with a mini
mum amount of change. It is‘ also believed to be
evident that the exhauster hereinbefore described
is particularly adapted to keep “maintenance cost
at a low level by cutting down the replacement
to only those parts that are actually worn, and
making such parts readily accessible for replace
ment.‘
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2,404,203
7'
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Having'thus describednmy invention, what'I‘
tachment of a conduit thereto, a diffuser tube
1_.'In'a steam jet exhauster’ of the character
described, a steam manifold of ring form having
secured to the frame members, and extending
from the manifold to the ‘discharge ?ange, said
diffuser tube having ?uid jet nozzle inlets in the
periphery thereof adjacent to the manifold, and
means on one face thereof for connection toga
?uid, jet nozzles connected to the manifold and
claim as new and desire to secure by vLetters V
"
Patent is:
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conduit, oppositely disposedframe members af
extending through said nozzle inlets.
6. In a steam jet exhauster of the character‘
?xed to said manifold and projecting fromsaid ,
manifold in the direction opposite to the conduit, ‘
described, a steam manifold of ring form having
said frame members having a discharge ?ange-af
10 means on one face thereof for connection to a
?xedthereto at the ends remote from the mani
fold, said discharge ?ange having means for at
1 tachment of a conduit thereto, spaced two-sec
?xed to said manifold and projecting from said
conduit, oppositely disposed frame members af- .
manifold in the direction opposite to the conduit,
said frame members having a discharge ?ange
tion connecting clamps attached tosaid framev
members intermediate the ends thereof, a diffuser ‘15 af?xed thereto at the ends remote from the mani
tube interposed between the manifold and the
fold, said discharge ?ange having means for at?
discharge ?ange and having a mixing chamber, ‘
tachment of a conduit thereto, a diffuser ,rtube
a tubularthroatportionand a tubular discharge
secured to the frame and extending from the
portion, said portions being removably supported
manifold to the discharge ?ange, and clamping
on said, frame membersby-said clamps‘ and said
means carried by said frame members securing
said diffuser tube to said members, saiddiffuser
discharge ?ange, a suction chamber comprising a
tubular member having an inlet end extending
tube comprising a plurality of tubular sectionsand
said clam-ping means comprising split rings cover
into the» manifold whereby to protect the inner .
wall thereof, said tubular member having cir
" cumferentially spaced apertures therein, nozzle
housings in said apertures and steam jet nozzles
connected to the manifold and. extending
through said housings andapertures into the in
terior of the mixing chamber.
ing the joints between said sections.
25
4
2. In an exhauster of the character described,
a pressure?uid manifold of ring form, a suction
I
'7. In a steam J'et- exhauster of the character
described, a steam manifold of ring form having
means on one face thereof for connection to a
' conduit, oppositely disposed frame members af
?xed to said manifold and projecting from said
manifold in the direction opposite to the conduit, ,
said frame members having‘ a, discharge’ ?ange
chamber tube having an inlet portion registering
a?ixed thereto at the ends remote from the mani
fold, said discharge ?ange having means forat-l,
, having nozzle mounting apertures peripherally =
tachment of aconduit thereto, a diffuser, tube
spaced about it, said manifold having outlets '35 secured to the frame and’ extending from the
therein outside the suction chamber tube and
manifold to the discharge ?ange, said diffuser
3 removable nozzlesconnected to said manifold to \
tube comprising'a tubular suction chamber sec;v
‘ receive ?uid from said outlets,» said nozzles ex
tion having an inlet portion extending into the
, with the opening through said manifold, said tube
1
tending into the suction chamber tube. through
manifold ring protecting the inner wall thereof .
said apertures.
from abrasive action of’ the material passing
through the manifold ring, a conical mixing
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v3. In an exhauster of the character described,
a pressure ?uid manifold of ring form, a suction
chamber section abutting said casing, a throat
chamber tube having an inlet portion registering
with the opening through said manifold, said
section abutting the mixing chamber section, and
a conical discharge section abutting the throat,
section and extending to the‘discharge ?ange.
8. In asteam jet exhauster of the character
described, a steam manifold of ring form having
1 tube having nozzle mounting'apertures periph
1 erally spaced about it, [said manifold having out
1 lets therein outside the suction chamber tube, ‘
removable nozzles connected to said manifold to
receive ?uid from said outlets, said nozzles ex
tending into the suction chamber tube through
1 said apertures, and nozzle guards mounted in said
apertures and shielding the walls of the nozzles
‘ from the interior of said tube,
means’on one face thereof for connectionto a
conduit, oppositely disposed frame members af
?xed'to said manifold and ‘projecting from‘, said
manifold in the direction opposite to the conduit,
said frame members having a discharge ?ange
a?‘ixed thereto at the ends remote from the mani
fold, said discharge ?ange having means for at
4. In an exhauster of the character described,
1 a pressure ?uid manifold of ‘ring ,form,‘ a suction 55 tachment of a conduit thereto, a diffuser tube
3 chamber tube having an inlet portion registering
secured to the frame and extending from, the
with the opening through said manifold, said
manifold to the discharge ?ange, said diffuser
tube comprising a tubular suction chamber sec
erally spaced about it, said manifold having out
tion having an inlet portion‘ extending into the
lets therein outside the suction chamber tube, 60 manifold ring protecting the inner wall'thereof
and removable nozzles connected to said mani
from abrasive action of the material passing
fold to receive ?uid from said outlets, said nozzles
through the manifold ring, a conical mixing
extending into the suction chamber tube through
chamber section, abutting said casing, a ‘throat
said aperture, said tube having seats about said
section abutting the, mixing chamber section and
apertures and said guards having ?anges rest 65 a conical discharge section abutting the throat
ing on said seats.
,
Y
section and extending to the discharge ?ange,
5. In a steam jet ‘exhauster of the character
said suction chamber section having peripherally
described, a steam manifold of ring formnhaving
spaced nozzle inlets therein and removable nozzle
1 tube having nozzle mounting apertures periph- =
1
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; means on one face thereof for connection to a 1
‘ conduit,.oppositely disposed ‘frame members af_' ,70
housings in said inlets.
'
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9.-In a steam jet exhaustenofhthecharacter, 7
1 ?xed to said manifold and projecting from said "
described, a steam manifold of ringform having
manifold in the directionopposite to the conduit, -
means’, on one face’ thereof for connection to a
said frame members havinga discharge ?ange
a?'ixed theretoat the ends‘remote from the man- i
3 ifold, said discharge ?ange having means for. at? 175
conduit, oppositely disposedframe members af
?xed to. said manifold and projectingfrom said
manifold in the direction opposite to the, conduit,‘
2,404,203
>
said frame members having a discharge ?ange
affixed thereto at the ends remote from the mani
fold, said discharge ?ange having means for at
tachment of a conduit thereto, a diffuser tube
secured to the frame and extending from the
manifold to the discharge ?ange, said diffuser tube
comprising a tubular suction chamber section
having an inlet portion extending into the mani
fold ring protecting the inner wall thereof from '
abrasive action of the material passing through 10
the manifold ring, a conical mixing chamber sec
tion abutting said casing, a throat section abut
ting the mixing chamber section and a conical
discharge section abutting the throat section and
10
said frame members having a discharge ?ange
a?ixed thereto at the ends remote from the mani
fold, said discharge ?ange having means for at
tachment of a conduitv thereto, a‘diffuser tube
secured to the frame and‘ extending from the
manifold to ‘the discharge ?ange, said diffuser
tube comprising a tubular suction chamber sec
tion having an inlet portion extending into the
manifold ring protecting the inner wall thereof
from abrasive action of the material passing
through the manifold ring, a conical mixing
chamber section abutting said casing, a throat
section abutting the mixing chamber section and
a conical discharge section abutting the throat
extending to the discharge ?ange, said suction 16 section and extending to the discharge ?ange, said
suction chamber section having peripherally
chamber section having peripherally spaced noz
spaced nozzle inlets therein, outlet conduits con
zle inlets therein, outlet conduits connected to the
nected to the manifold at peripherally spaced
manifold at peripherally spaced‘points thereon
points thereon outside of and around the suction
outside of and around the suction chamber sec
tion, and ?uid jet nozzles on said conduits extend 20 chamber section, ?uid jet nozzles on said con
duits extending through said inlets, and nozzle
ing through said inlets.
,
housings in said inlets protecting the portions of
10. In a steam jet exhauster of the character
means on one face thereof for connection to a
the nozzles interiorly of the suction chamber sec
tion from abrasion by material passing through
conduit, oppositely disposed frame members af
said section.
described, a steam manifold of ring form having
?xed to said manifold and projecting from said
manifold in the direction opposite to the conduit,
'
CARL F. ZIMMERMANN.
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