close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2112848

код для вставки
~April 5, 193s.
R. JACKSON
2,112,848
MIXING AND BLENDING
Filed Oct. 22, 1936
-
„faund, “
.
nE
‘W “iL/QH,
2,112,848
I Patented Apr. 5, 1938 -
UNITED STATES
PATENT _OFFICE f
2,112,848 "
MIXING AND BLENDING v
Reginald Jackson, Clayton, Mo.,vassignor to Alu@
minum Company of America, Pittsburgh, Pa.,
a corporation of Pennsylvania
-
Appuestion oetober‘zz, 193s, serial No. 107,005
9 Claims.
This invention relates to the mixing and blend
ing of granular or powdered materials, kand
specifically to the mixing and vblending ofsuch
materials in large quantities such as, for ex
5 ample, carload lots of l approximately 60,000
(ci, 259-3)
Fig. 4 is a section taken on line IV-IV of'Flg.
1, showing a scoop feeder provided with a gate for
regulating discharge of the material; ~
y Fig. 5 is a section takenon line V-V of Fig. l,
showing the discharger scoop._
.l
5
The apparatusof this invention consists es
sentially of an external cylindrical drum, rela
together several kinds of -granulariorv powdered tively long in proportion to its diameter, together
with an inner cylindrical drum coaxial with the
materials of different characteristics sol inti
l0 mately, so completely, and so uniformly that every _ outer drum. 'The outer drum may- be equipped 10
sack of the mixture in a carload shipment would with circular tires and supported on fixed rollers,
contain identical proportions ofthe several in
or the >tires and rollers may take the form of suit
gredients and be of identical quality. Modern able gearing.V The particular form of support
specifications and mass production manufacture and power mechanism is immaterial, so long as
’ require a, mixing apparatusl capable of obtaining reversible rotation of the unit about its horizontalA 15
and maintaining uniformity throughout a large axis is possible.` Both the outer drum and the
quantity of mixed materials.
inner cylinder are provided with helical blades,
The primary object of the invention is to pro
and for the sake of convenience, will be vherein
pounds.
.,
`
,
Heretofore it has been diiilcult to blend or mix
vide an improved method and apparatus of the
character stated which is capable of carrying out
a mixing and blending operation with a minimum
after referred to as helical “flights".
The term '
A further object of the invention is to pro
vide a mixer capable of vconveying material in
opposite directions at the same time and in which
the material as it travels through the apparatus
“flight” will be regarded as defining the particular 20
blading in a predetermined section of the ap
paratus as, for instance, single helical flight or
double helical flight. The inner cylinder is pro
vided With several discharger units forv emptying
the material from the inner cylinder intothe
outer drum. ¿Suitable scoop feed .anddischarge
is automatically divided into several predeter
units are provided at appropriate places in the
mined paths or streams of flow.
apparatus for moving- the material being mixed
amount of physical labor.
,
»
-
A further object of they invention isv the pro
from one section of the machinevto another, Aac
vision of a process whereby granular or powdered ‘ cording to the direction of rotation of the drum.
materials are mixed or blended more completely The outer drum receives` and discharges material
in less time than heretofore known.
through a single feeding and discharging unit
j .
A further object of the invention is the pro
vision of a method for mixing materials where
35 by several portions of the mass, into which it is
divided, are conveyed in _opposite directions, in
dividual portions being reintroduced to the mass
at spaced intervalsjalong the path traversed by
the original mass.
40 yA still further object of the invention is toy
provide a rotary conveyor having associated there
with means to positively divide the traveling mass
into several units and to` direct each such unit
along its path of travel.
` ,
y
,
r
In the accompanying drawing forming a part of
this specification, Fig. 1 is aside elevation ofthe
assembled apparatus with part oi' the shell broken
away, showing a portion Aof the longitudinal con
veying mechanism;_
v
Fig. 2 is _a section taken on line II-II of. Fig.j1,
showing the scoop feeders;
¿
Fig. 3 is a section' taken on line III-_III of
Fig. 1, which shows the dual feeding screws, to
gether with one of the central tube discharge
55' units;
'
which is provided at eitherv end with scoops.
The outer drum in its preferred form comprises
an elongated casing I which for clarity'and con
venience may be regarded as 4being of three sec
tions, A, B, and Q. Each of these sections extends
approximately for a distance of about ,one-third the length'of the outer drum. kInside of and co
axial with the drum is unitarily mounted `a cy-.A 40k
, lindrical _tube 2 of alength slightly less than‘that
'^ of the outerY drum. Likewise, the inner cylindrical
.tube may be regarded as comprising three sec
tions, a,.`b, and c. , Rigidly secured to the inner
surface` of the outer drum are conveying means
. which, in .the preferred form, are flights. of
helical blades. In .section A there is provided a
single helical flight; in section B, a double helical
flight, and in section C, a triple helicalv flight.
Within the inner- cylindrical tube and rigidly se
cured thereto are similar flights of helical form:
section a, having a single helical flight, section b,
a double helical flight, and section c, a`triple
helical flight. ‘It is to be noted that the ‘.‘hand”
of these ñights is opposite to that of >the‘»'hand” 455V .
'
’ 2,112,848
of the nights oftheouter drum, so~ that upon ldirection of rotation of the drum. A gate f -|40
rotation of the drinn, material will be conveyed serves to permit discharge of the blended mate
rial at appropriate times.
.
along the length of the _inner cylinder in a di
Inkoperation, the gate Il is closed and the
rection opposite to that in which it is traveling
along the outer drum. Therefore, whether blend ' material to be mixed or blended fed into the 5
ing or discharging, material is being moved in
supply hopper Ii.
The drum is rotated in a di
rection (counter-clockwise looking `at Fig. 2) such
that the material isvpickl'ed up by the external
same time, but in opposite directions.
«
A charge or batch of material entering the inlet y,scoop feeder and delivered to the inside of the
¿end of the mixer is conveyed along -the outer drum. As the material travels through the drum,
drum from .left to‘rlght (Fig. 1) bythe helical it is successively dividedìinto separatestreams
both the outer drum and inner cylinder at the
~ nights secured to the inner surface ,of the outer
and kcontinues its travel- until it contacts the
three scoop feeders at the right-hand end ofthe ’
drum. While passing through section A of the
drum, the material may> belregard'ed' as. being
machine. Herve each stream is denected 4'into its
moved in a single “stream". Upon reaching sec#
own separate space which is established bythe
tion B, the double helical nights of blades in .that . triple helical nights within section c of the inner
section divide 'the single “stream” into two
."streams" of material and `likewise the double
“stream" passing from section B to sectionC is
»divided into three “streams”, due to the triple
v>helical nights ofthe latter section. Hence, what
’ pwas la' single “stream” of advancing material in
>`section A is nowa triple “stream" in section C.
At the extremeright-hand end of thev mixer
and enclosed within the end of the drum are
three'scoop feeders-3. These scoops are of the
same hand and are disposed in such a, manner
that eachscoop'picks up material which is be
cylindrical tube. . The direction of travel of the >
material is now reversed, and as the material
progresses from section to section through the
inner cylindrical tube, the streams of material 20
successively decrease in number. 'I'he discharger
>units mounted on the inner tube serve to each
discharge one stream of material and returnV the
same to the outside drum.
'
After the "desired ëmixing and lblending has 25
taken place and the machine is to be discharged,
the direction' of rotatior` n! the drum is reversed.
Upon reversal, the material in the drum outside
ing conveyed along the outer drum by the triple
helical nights and deposits it into the inner cy
the central tube then yis moved toward the left
hand or .feed-end of the machine, where the dis
l‘ndrical' tube 2.
charger inside the feed end will serve as a pick
Within- section c of the inner
- helical nights of blading of a hand oppositeto
upr scoop. 'I'he helical night in the feed-and
discharge unit, together with the external scoop,
the hand of the nights of the outer drum. Ma
will now operate to convey material out of the
cylindrical tube, the conveying meansare triple
30
terial which has been picked up'byv the scoop feed-v drum into the hopper, where it is discharged for
crs 3is delivered to one in particular of the three delivery.
'I'he result of this action is a uniform and ei'
spacesbetweenthe three distinct and separate
sets of- helical nights and is conveyed from right ficient blending. I have been able to blend,_ in
to left in three “streams” for a distance of ap
40
proximately one-thirdl the> >length of 'the inner
cylindrical tube.
'
ì
l.
Mounted on the central tube between sections
a, b, and c are discharging means 4 (see Figs. 1
and 3) _' These dischargers’are so arranged that
45 each one 'discharges material from only one of the
spaces established by the helical nights within
the practical operation of a large machine', vari
ous sizes, kinds and quantities of material which
may be charged to the drum> invany desired se
quence and in any desired proportions.
`
I
claim:
~
`
'
`
1. In a mixing and blending machine, an outer
revoluble drum, a unitarily mounted inner cyl 45
inde'r, helical conveyors disposedY within said
drum and cylinder for feeding material in oppo
„ the inner cylindrical tube. The material is emp
tied into the outer drum, where> it again resumes site directions, means for feeding material from
` its travel toward the right-hand end of the said outer drum into said inner‘rcylinder and ak
plurality of discharging means spaced axially on 50
50 drum. After one "stream” of material is emp
tied into the outerdrum by the discharger be -said inner cylinder for discharging material from
tween sections b and c, the> remaining double said inner cylinder to said outer drum.
2. In a mixing and blending machine, an outer
“stream” continues on through' section b until
reaching the discharger between'sections a and revoluble drum, a unitarily mounted inner drum,
55 b. Here,` another* “stream” is deflected into the yhelical feeding conveyors yrigidly secured to the 55
outer drum and4 the single remaining “stream” inner surfaces of said‘drums for progressively
4'permitted Vto pass along section> a where, upon feeding material in opposite directions simulta
neously, means ' fory feeding 'material from ~ said
rreaching the last discharger, itylikewise is emp
tiedy into thef'outer drum.
'
v
vAt the left-hand end of the machine -there
is located a feeding and discharging unit A5. A
relatively small feed-and-discha'rge neck 6 is pro
vided on the axis ‘of the drum.` Atpeithe'r end
outer drum into said inner drum and a plurality
of axially spaced discharging means on said in 80
ner drum 'for discharging material from said in
ner dmm to said- outer drum.
`
1 3. YIn a mixing and blending machine, unitarily '
mounted revoluble inner and outer drums, means
'rigidly secured to the'interior of said drums for 65
feeding material through said drums simulta
cate 8’ is mounted on'the scoop 8.- These scoop neously in oppositedirections, means for feed
>of this neck are scoop'feeders 'I and 8,» one be
65 ing located outside thev drum, the -other vwithin
‘ the head of the drum. A discharge regulating
feeders are of yopposite handjso that when ro
tation >of the drum is such that the external
70 feeder 1 is picking up material, the internal scoop
feeder 8 will discharge material intothe drum.
The conveying element vof the unit 'Q is a single
helical screw, and affords appropriate movement
-of the material from the external feeder into the
75A internal feeder or vice versa, according to the
ing material from said outer drum into said inner
drum and a plurality of axially'spaced discharg
ing means Vmounted on said inner drum for 'dis-’
charging material from said inner to said outerl
drum whereby the travel of said discharged ma
terial is
reversed.
`
ì
ì
y
'
.
4. In a mixing and blending machine, inner
and outer co-axlal revoluble drums, each having
2,1 12,848
helical conveyors rigidly mounted on their inner
surfaces, the outer conveyor comprising nights
which progressively increase in number at pref
determined points from the supply end toward
the discharge end of the outer drum, the inner
conveyor comprising nights which progressively
decrease in number at pre-determined points
from the supply end toward the discharge end
of the inner drum, means for feeding material
10 from said outer drum into said inner drum and
means for discharging material from said inner
drum to said outer drum.
5. In a mixing and blending machine, uni
tarily mounted revoluble inner and outer drums,
conveying means rigidly secured to the inner sur
faces of said drums for simultaneously feeding
material through said drums in opposite direc
tions, said conveying means comprising progres
sively increasing and decreasing sectional flights
from the supply ends of said drums, respectively,
and means axially mounted on said inner drum
at the points of decrease of the nights for dis
charging material from said inner to said outer
drum.
6. In a mixing and blending machine, unitarily
mounted revoluble inner and outer drums, con
veying means rigidly mounted on the interior
surfaces of said drums to progressively move ma
terial in said drums in opposite directions at the
same time, said conveying means comprising a
plurality of sectional progressively increasing and
decreasing flights of blading, means for feeding
material from said outer drum’into said inner
drum and means axially mounted on said inner
drum at the points of decrease of the nights for
discharging material from said inner to said
3
outer drum, thereby reversing the direction of
movement of the discharged material.
'7. The method of mixing and blending granu
lar material which comprises conveying said ma
terial in one direction, dividing said material at
_certain points of its travel into an increasing 5
number of portions, reversing the direction of
travel of each said portion, successively decreas
ing the number of portions - at predetermined
points during the Yreversed movement, and caus 10
ing each said reversed portion to be positively
fed in the direction of its initial movement.
8. The method of mixing and blending granu
lar material which comprises dividing said ma
terial into an increasing number of portions
successively during the initial forward movement
of said material, reversing the direction of now
of all of said portions, and decreasing the num
ber of said reversed portions successively at pre
determined points of its travel by causing one of
said reversed portions to unite with other mate
rial and be fed in the direction of said initial
movement at each of said pre-determined points.
9. The method of mixing and blending granu
lar material which comprises dividing an orig- ‘
inal stream of material into an increasing num
ber of streams successively during the initial for
ward movement -of said material, reversing the
direction of now of all of said streams, and de- »
creasing the number of said reversed streams suc 30
cessively at pre-determined points of its travel
by causing one of said reversed streams to unite
with said original stream and be fed in the di
rection of said initial movement at each of said
pre-determined points.
'
REGINALD JACKSON.
Документ
Категория
Без категории
Просмотров
0
Размер файла
497 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа