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Патент USA US2064627

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Dec. 15, 1936.
Filed Feb. 2, 1954
‘ 2 sheets-sheet 1
Dea-.15, 1936.
» ll... B; PAINE `
Filed Feb. 2, 19:54
ì 2 Sheets-Sheet 2
Patented Dec. 15, 1936
2,664,627 ,
Louis B. Paine, Big Spring,~ Tex., assigner to
National Aluminate Corporation, Chicago, Ill.,
` a corporation of Delaware
Application February 2, 1934, Serial No. 709,483
4 claims.
(c1. 21o-31)
'I'his invention relates- to a method and appa
~ ratus for mixing a liquid in predetermined quanti- «
ties with another liquid while the latter is-flowing
may be controlled either automatically or manu
, Further objects will be apparent from the speci
_ through a conduit, and it has special reference
5 to a method and apparatus whereby one liquid
stantially any water mainin which a pressure flow
iication yand the appended claims.
In the drawings:
may be injected into another liquid flowing
through "a conduit or main in a quantity propor
Figure 1 is an elevation, partly in section, ofi~
. tional to the flow of the liquid through said con- _
one embodiment of the invention as applied to a _
vertical water main; and
duit, the intermixing of these two liquids being
10 automatically stopped when the flow of the liquid
through the conduit ceases.
Fig.' 2 illustrates the invention `as adapted forilse in connection with a horizontal water main. .
Referring to the drawings in detail, the em- _
While the means and method ~herein disclosed
are adaptable for use for various lpurposes and in bodiment illustrated inv Figure 1 comprises a water
main E which may be arranged for either continu
’ various capacities, it is particularly useful for in
jecting a solution, such as a water softening agent, ous or intermittent Water ñow therethrough, and
into> a water main leading to a water-storage the iiow may be either uniform or variable. In
tank such as is used for supplying water to the ‘ the present instance, this water main comprises
a lower section 2 and an upper section 3. The
boilers of railway locomotives. ' In such installa
section 2 is provided with a nozzle d extending
tions the inlet to the storage tank may be sup
into the section 3 and, having a restricted passage 20
gq)v plied with an automatic control mechanism
whereby a predetermined water level may be con
5 therethrough.
Thelrestricted nozzle ä extends> .
stantly maintained in the storage tank. ri'here
fore, the water which is ‘led to the storage tank in
far enough into the section 3 to provide a cham
ber 6 around the nozzle and between the nozzle
flow therethrough and into the tank, or the rate
of flow through the mainr may be variable.
of water through the restricted passage 5 and 25
the section 3 of the main will tend to reduce the
a suitable main or conduit may intermittently “ and the .Walls of the main and wherein the Ílow
‘ it is an object of the present invention to pro
vide an eiiicient automatic means and method
Anali* tank or drum l is connected to the main
whereby a liquid solution, such as a water soíten.- - by‘means of a pipe 8 which is positioned some
3o» ing agent, may be injected into water that is
iiowing throughs. main in proportion to the rate
of now therethrough and wherein the ilow of,y the
solution to the water flowing in the mainis auto
matically varied in accordance- with variation of
distance below the nozzle and provided Vwith a 30
valve 9. Although this is termed an air tank, it
will be partially iilled' with water during the.
operation of the device.
The upper endof a solution tank l0 communi
35 the> ilow and is automatically stopped when the
-cates with the upper portion of the. air tank l
the storage _tank a’predetermined percentage .oi
connected adjacent the bottom of the solution
iiow is stopped, thereby always maintaining in
the solution per unit volume of water contained
in the storage tank.
Broadly, the invention comprises a pressure by
passincluding a volume of solution for automatic
through a suitable conduit il.
A conduit i2 is
tank lil and communicates with the space or
chamber S in the mainbelow the end of the nozzle
t. This conduit l2 contains, in series, a strainer 40
i3, a regulating valve i4, a check valve l5 and a
delivery at the low pressure end of the by-pass ' shut-ofi valve it. The water pressure from the
main against the check valve I5 prevents the ñow
ed from mixing with the volume of solution in the of solution-therethrough when water is not flow
ing in the main.
by-pass. ¿In other words, the invention contem
A drain valve il is-provided for the solution
plates utilizing the pressure diiierence between
y two spaced points in_'a'water conduit or main to tank, and a similar'drain valve I8 is provided
compress a volume of air which, in turn, reacts for _the air tank._ A funnel i9 and valve 20, are
on a volume of liquid to cause a predetermined provided at the vtop »of the solution tank where
percentage flow of said liquid solution' into the by solution may be added thereto as desired. »A
, .gauge glass 2i is connected between the conduits
iiowing water at the low pressure point. i
‘A further object is to provide a device which >l2 and _il in a manner to constantly indicate
is oi simple construction, entirely automatic in the/Y height ofthe supply of solution in the
' and in an arrangement whereby water is prevent
operation after once adjusted,r and which will not
easily get out of order and may be applied to sub
lnoperating the device, the solution tank may 55
_- _2,064,627
be substantially illled, preferably with a sodium
aluminate solution although any other suitable
limits,4 depending in some respects upon the
pressure head that ordinarily exists in the main
solution may be used, and the valves 9 and vI6 I near the pipe 8.
are openedto a1low_water and solution; respec-` ` In Fig. 2 the> device is illustratedas applied
tively, to ilow therethrough. The regulating tofa horizontal water main 22 in-which the wa
valve I4, which is preferably of the needle valve ter ñow may be controlled by any suitable means..
type, may be accurately adjusted to permit a
predetermined ñow of solution~„therethrough
when' water is flowing in the main I.
When `
In this’arrangement `the tanks an'd conduit con
nections therebetween and the water main- 22
are somewhat the same as previously described -
all of the valves are properly adjusted and wa
for Figure 1, except' that in the arrangement oi."
ter is flowing in this main, the diiierence in the vFig. 2 pressurefby-pass is provided between two
pressures obtaining therein at the conduit 8 and _ spaced points in the main 22.
at Ithe chamber 6 adjacent the nozzle 5 will
In Fig.- 2 the jet is not inserted in the water
cause water to be forced'into the` 'air tank 1 main 22 but, instead, is inserted-in a shunt con
15 through the pipe 8 and this, in turn, will cause duit 23 which may be connected, as shown, to
the solution to be drawn through the conduit I2 lthe water main 22 and provided with control
and intoy the main I adjacent the nozzle 5. A . valves ‘24 and 25. This shunt conduit 23 is pro
volume of air is thereby trapped under pressure vided wlth a restricted nozzle 26 extending into
in the upper ,portions .of both tanks 41 and I0 a pressure reduction space 21 in the same man
'20 and in the connecting pipe II in accordance ner as previously described for Figure 1. The
with the pressure in the main; and when wa
`outlet conduit I 2a from the .solution tank I0a
ter is flowing inthe main the reduced pressure is‘connected to this pressure reduction space 21
around the nozzle 4 automatically sets up a pre
determined iiow of lsolution through the con
25 duit I2 and into the chamber- 6 of the main
`at 28 yin substantially the same manner as pre
viously described.
~ In\this construction the pressure in the wa
3 -vvhere -it is mixed with the water iiowing there
ter main 22 will causev a water pressure to be
through. _Th‘e percentage of solution-per unit ' exerted inï‘the~ air drum 1a until entrapped air
volume of water flowing in the main may be ac
in the upper portion of the tanks 1a and Iûa
curately controlled by adjustment of the regulat 'and in the conduit IIa is compressed equiv
30 ing valve I4.
alent to the pressure of the water. This`pressure
When no -water is iiowing, the pressureadja. ‘is exerted against the solution in the tank IIia so,
cent the nozzle I and at the conduit 8 leading which is forced through the strainer I3'a and,
to the air tank is substantially the same. The assisted by the. suction due to reduced pressure
body of solution, therefore, in the tank-'I0- will in the chamber 21, enters the conduit 23 and
35 be> balanced between these two forces', and there therethrough into the water main 22. When
will be no ñow of solution into the main. Thev water is notfiowing in the main 22,' the pres
body of air entrapped in the top portions'of both sure is equalized in the conduit 23 and the pres
` tanks 1 and I Il and the'pipe II or between the sure therefrom 'seats tlie check valve I 5a and
water and the _solution acts as a cushion or prevents any iiow of solution from the tank IIla.
40s bumper and transmits thev pressure of the water
Referring again to Figure 1, the height oi' the
l,from the' air tank to the solution and prevents solution in the solution tank I'Il is constantly in. 4o.
water from the conduit 8 entering the solution dicated by the gauge glass 2|, and when it is
tank'through the conduit II.> The check valve necessary to reñll the solution tankv the valve 9
I5 prevents water from the main enteringA the leading from the main'I to the air tank 1 is closed
'45 -solutionthrough the pipe I2 when no water is and the valve I8 is opened to drain the water
. _flowing in the main.
from the air tank 1. 'I'he valve 20 at the top `ot
. When water isallowed to flow in the main II, the solution tank is also opened and the required
_ the pressure obtaining in' the chamber 8 adja
amount of solution is poured in through thefun- '
cent the nozzle 4 is appreciably lessened and in nel ' I9. The valves 20 and I8 are then closed and
50 actual practice often becomes less than-'atmos
the valve 9 opened, and the device is again ready
>pheric pressure by reason of the water jet pass
for` automatic operation. 'I'he same process is
ing through thel nozzle l. , Therefore, the solu
followed in ñlling the _device shown in` Fig. 2
tion from the tank III quickly moves in the di-- after closing the valves 2l 'and 25. When the
rection of this lower pressure and the prede-. `wateris' being drained from the tank 1, and it is
-55 termined amolmt ofsolutionper. u_nit volume of desired to add liquid to the tank I0 at the same
moving water in the main enters the main ad time, then a valve I I b'. may be opened to the at- jacent the water jet.. By this means a vprede
termined percentage ratio of solution and waterl
may always be maintainedin a suitable storage
60 _tank supplied from the main, either intermit
tently or otherwise and irrespective‘of- pressure
or rate of iiow.
~ .
mosphere, otherwisethe suction caused by the
water discharging frcîni the tank- 1 ,may cause .l
some-of the liquid bein‘g poured through the fun
nel I9 to bedrawn over into the tank 1 thus cre
v- ating waste oi' this liquid. The valve IIc in Fig. 2
,It is desirable that the nozzle I, or other equiv
As previously
the same stated,
the _ invention herein dis
.closed is adaptable for use in> 'connection with any '
65 pressure in the-main through which the water . suitable water storage tank, >such as used for sup
-~ is delivered to the storage tank, should be posi
tioned above the >top `of the solution in the tank plying grailway locomotives. .In this connection ,
_alent means for providing a point of' reduced '
I0,_ and it is preferable'that the 'ratio `of -the
`volume of the air tank 1 to the volume of the
either the arrangement shown in Fig. 1 or that l.
shown in Fig. 2 may be used, In Fig. 1 is illus
trated a storage tank 29 into‘which _the conduit
3 extends' and whichis-provided -with a valve 30.
This approximate ratio. and the approximate posi
The valve maybe automatically controlled by 70
tioning of the' nozzle and jet yand -connections .a
float 8| on an arm 32 connected with the valve
theretohave been found to give satisfactory re--'
suits. But iti is apparent that xthe aforesaid stem. This automatic'valve control may be of any
` ratio of tank‘volumes may be varied within wide of the usual well known types whereby adesired
water level may be constantly maintained in the
70 solution'tank- I Il should be not less than 5 to 1.
_ acumen'l
tank. It will be apparent that in this construc `said reservoir, an air reservoir communicating
with said solution reservoir, said air.reservoir also
tion the flow of solution will be automatically communicating
with said conduit at a high pres
varied or stopped in accordance with the opera
irom said suction chamber.
tion of the level control valve 30 yin the tank 29,
3. .A solution-feeding device, comprising a water
and that the iiow of solution from the tank Il
into ’the main I will be governed accordingly and conduit having a restricted nozzle forming an ex
p, a predetermined ratio of solution to water can be tension in the direction of pressure iiow, said
having a suction chamber adjacent there- '
maintained in the v storage tank 29 at all times. nozzle
Further modifications will be apparent to those to and communicating with said conduit adja 10
cent the end of said nozzle, a solution chamber
10 skilled in the art, and it is desired, therefore, that positioned below said nozzle, a conduit communi
Y my invention be limited only by the prior art and
eating with the bottom of said solution chamber
the scope of the appended claims.
and with said suction chamber rearwardly of the
Having thus described my invention, what II
claim and desire to secure by Letters Patent is:
1. In van automatic solution-feeding device `of
the character described. the combination with a
water main carrying water under pressure and
having a restricted portion in said main forming
an extension in the direction oi' iiow, said main
20 forming a suction chamber below the end of said
extension and providing a reduced pressure in
take, a solution reservoir positioned below said
intake `and connected'thereto by a restricted pas- sage, a check valve in said passage to prevent iiow
25 to said reservoir, an air reservoir communicating
'with the upper' end of said solution reservoir, the
lower end of said air reservoir also communicating
with said main at a high pressure point remote
irom'sald suction chamber, the ratio of the vol
end oi' .said nozzle, and an air reservoir having its
upper end communicating with the upper end ot 15
said solution chamber and its lower end com
municating with said water conduit at a high
pressure point remote from said nozzle, said air
reservoir’being of sutilciently greater capacity
thansaid solutio‘n reservoir that the volume of 20
air trapped in the air reservoir under pressure
when said solution reservoir isiull is greater than
the capacity of said solution reservoir. .
4. A solution feeder oi' the character describedcomprising a‘high pressure water conduit, a vena 25
contracta in said conduit, a solution tank below
said vena contrasta. a solution channel from
the lower end of said solution tank to a low pres- '
sure region produced by said. vena contracta,
an air tank at substantially the same level as said 30
30 ume of said air reservoir to said solution reservoir
- solution tank but of materially greater capacity,
being approximately 5 to l.
2. In an automatic solution-feeding device for
- the purpose described. the combination with a
a water channel from a high’ pressure point in
said water conduit to the lower end oi' vsaid air
an air channel' between the upper ends of
water conduit carrying water ¿under pressure and . tank,
said tanks and >extending a material distance
above said solution tank. said tanks and said
nozzle’in saidì main extended in the direction oi.’ channels being constructed and arranged to
iiow, a relatively large suction chambery around maintain trapped air above lsaid solution and a
vsaid extension -to provide a large reduced-pres
total volume of air between `the low pressure solu
',o sure intake around the end o! said nozzle, a solu ', -tion outlet and the highìl pressure water inlet nra
tion reservoir positioned entirely below said suc
terially greater'than tire capacity of said solu
v tion chamber and connected thereto remote from
the end of'said extension by a restricted passage. Vtion tank and said air channel.
a `check valve in said passage to prevent ilow to
. having a restricted portion Aforming an extension
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