close

Вход

Забыли?

вход по аккаунту

?

код для вставки
Dec. 10, 1946.
Lo. BIGGLE
'
_ 2,412,490
FLUID CONTROL VALVE
F‘iled April 26, 1944
Bummer:
‘ LAURENCE C. BIGGLE,
Bu
Z
2.412.490 1
Patented Dec. 1%, 1946
o ems-rs‘ serum orrics
2,412,490
rerun couraor. VALVE .
Laurence C. Biggie, Altadena, Calif“ assignor to
General Controls (Cos Glendale, Calif; a corpo
1
ration of California
Application April 26, 1944, Serial No. 532,795
5 (llaims. (ill. Hit-14d)
My present invention relates to fluid control de
vices, and more particularly to a combination
diaphragm valve (operated by the pressure of the
3111i? controlled thereby) and ?uid pressure reg
a or.
'
_An object of the‘ invention is to provide a de- .
' vice of the particular character described where
2
phragm member. Secured to the upper dia
phragm member 2| is a stem 21 which extends
downwardly through the hollow of screw 20 and
through the port opening 45 and is provided
Cl therebelow with a closure 28 cooperable with the
edge of the bottom end of the port opening. In
assembly, the stem 2'! is introduced through an
opening in the bottom wall of the casing which
is then closed by a plug 29.
in the movable wall, or diaphragm, for operating
the main valve closure and that for operating the
Sealingly joining the adjacent central portions
regulator closure constitute walls of a common 10
of the diaphragm members is an expansible-con
pressure chamber which, by pilot valve means, is
tractible bellows 38, of rubber or thin metal. The
selectively placed in communication with the in
?anged open bottom end of the bellows is clamped
let or with the outlet of the device to effect the
by a ring 31 to the lower diaphragm member IT,
desired control of fluid flow and pressure.v
and the head 32 of the bellows 'is clamped to the
Another object is to provide a combination
upper diaphragm member 2i by the shoulder on
diaphragm valve and pressure regulator wherein
stem El below the reduced upper end portion of
variation of pressure drop across the main valve
the same which passes through disk 23. There
‘ seat is compensated for vby the regulator.
is clearance between stem 2‘? and the screw 20,
Another object is to compensate for the inlet
and the interior of bellows 30 is therefore in com
pressure to which the regulator closure is ex
munication with the area below the central por
posed, by subjecting a portion of the regulator
tion of the lower diaphragm member H. In
diaphragm to the inlet pressure, so that the reg
terposed between the spacing rings flit-25 is a
ulator responds solely to the outlet pressure.
centrally-aperturecl disk 33 which serves to limit
Other objects and advantages of the invention
will be found in the description, thedrawing, and 25 upward movement of the lower diaphragm mem
ber.
'
the claims; and, for full understanding of the
The cupped member 28 is vented to the atmos
invention, reference may be had to the follow
phere by a ?tting 3t and therefore serves mainly
ing detailed description and accompanying draw
as a protecting cover for the upper diaphragm
' ing, the single ?gure of which is a sectional view
member 2!. When the device is employed for
of a device embodying the invention.
the control of gaseous fuel, a pipe (not shown)
In the drawing. the numeral l l indicates 2. cas
is usually connected to the ?tting 34 and ex
ing having an inlet chamber l2 ‘and an outlet
tended to a point where any gas which. due to
chamber l3 separated by a partition it having an
leakage or rupture of the diaphragm 22, might
elongated cylindrical port opening it there
through; the material of the partition around the 3. pass to the interior of the cupped member would
be safely discharged.
‘
>
upper end of the port opening being raised to
provide an annular valve seat it.
Covering an
opening through the top wall of casing H is a
first diaphragm member, generally indicated at
ii and comprising a diaphragm it, of flexible and
Mounted on the top surface of the cupped
member 28 is a housing 35 which forms a cham
ber for-a three-way pilot valve comprising a pair
40 of jets 36-37] with which a closure blade 38 co
operates. The blade is fulcrumed toward its lower
impermeable material such as treated leather,
and a metal disk it which is secured to the dia
phragm by a hollow screw it. The diaphragm
end on the lower arm of a U-shamdelectromag
net core 38 and is biased into seating engage
member ll serves as a closure for the Seat it and
isbiased into engagement therewith by the weight
ment with the jet 36 by a tension spring mill.’ The
blade 38 is of magnetic material and is attracted
of disk It.
toward the upper arm of the core, and into seat
'
‘
Above the ?rst diaphragm member ll is a gen
erally similar second diaphragm member ‘2i which
comprises a flexible diaphragm 22, conveniently
of leather, and-a disk or weight 23. The diaé
phragmmembers are spaced apart by a pair of
ing engagement with jet 3?, when the core is
energized by passage of current'through its coil
winding ll. The jet 3% forms one end of a pipe
s2 which extends outwardly of housing 35;, and
- through aligned openings in the spacing rings
25-25 and the top wall of easing H, to the out
let chamber l3. ‘ Similarly, the jet 37 forms one
tions oi’ the diaphrag'rns, and are secured by these
end of a pipe t3 which communicates, by a pas
portions to the top surface of the casing, with
a cupped member 28 covering the upper die. 55 sage d5 through the casing, with the inlet cham
rings ?ll-‘25, disposed between the- marginal por~
6
_ .
2,412,490 '
ber l2. Interconnecting the interiorof housing
35 with the-pressure chamber 45 de?ned by the
. diaphragm members I‘! and 2| ,‘ is another pipe 46.
Assuming that the device is connected in'a gas
conduit for supplying a burner or a plurality of
burners, the parts will be in the positions shown
the pilot valve blade 38 being _ in'
its released position in engagement with jet 36
and the pressure chamber 45 between the dia
in the drawing;
4
sure (lower diaphragm member) is not fully open
and therefore e?ects a substantial pressure
drop—as when the inlet pressure is abnormally
low—the regulator closure opens wider to com
pensate for the reduction of outlet pressure. It
is thus apparent that any restriction of ?ow
caused by the main closure is, compensated for
by the regulator closure. It also follows that the
weight of the lower diaphragm member, or _main
phragm members therefore in communication 10 closure, can be greater (and thus e?ect greater '
seating force) in the device disclosed than in an‘
with the inlet l2 through pipe 46, interior of
internally-vented diaphragm valve which lacks
housing 35, open jet 31, and pipe 43. Since ap
the regulator arrangement of the present inven
proximately equal areas or the opposite sides of
tion, because of the fact that any extra pressure
the lower‘ diaphragm member‘ l1 are subjected
to the inlet pressure, this member rests by grav 15 drop produced by p'ossible closer positioning of
ity on the valve seat It and ?ow to- the burners is
obstructed.
The underside of the upper dia
I the heavier closure above its seat is compensated
for by the regulator.
The embodiment of my invention herein shown
phragm member 2| being subjected to the inlet
pressure, and its opposite side to atmosphere,
and described is obviously susceptible of modi?
this member is in raised position with the regu 20' cation without departing from the spirit of the
invention, and I intend therefore to be limited
lator closure 28 in tight engagement with its
only by the scope of the appended claims.
seat, so that the port opening it is closed at both
I claim- as my invention:
ends.
-
'
If the electromagnet core 39 is now energized,
_ the pilot valve blade 38 is attracted out of en
'
1. In a ?uid control device: a casing having
a
partition
dividing it internally to form an inlet
25
and an outlet chamber, said partition having a
gagement with jet 38 and into engagement with
jet 31, so that the pressure chamber 45 is placed
in communication‘ with the outlet I3, through
port opening therethrough interconnecting said
chambers; a ?rst ?exible diaphragm member
closing an opening through a casing wall of said
pipe 42. Due to the resultant reduction of gas 80 inlet-chamber and having a portion forming a
?rst closure cooperable with the inlet end of said
‘ pressure above the lower diaphragm member I‘!
‘(it being assumed that the conduit leading to the 1 port opening and biased theretoward; a second
?exible diaphragm member at the side of said
burners is unobstructed) this member is forced
upwardly, normally into engagement with stop _?rst diaphragm member away from said inlet
chamber; means de?ning with said diaphragm
disk 33, by the inlet pressure below it so that the
members a pressure chamber therebetween; a
' port opening I5 is uncovered. Also, due to the
second closure operatively connected to said sec
reduction of pressure below the upper diaphragm
pipe 46, interior of housing 35, open jet 36, and
ond diaphragm member and cooperable with the
member 2|, that member tends to fail by gravity
outlet end of said port opening; and means, in
cluding pilot valve means, for ?uidly connecting _
said pressure chamber with said inlet chamber in
one (position of the pilot valve means, and with
said outlet chamber in another position of the
pilot valve means; the arrangement of said clo
sures being such that, with decrease of pressure
in said pressure chamber, both of the closures
so that theiregulator closure 28 opens to some
extent. However, as the gas pressure then rises
in the‘ outlet l3 (and in the chamber 45) the dia
phragm member 2| is again forced upwardly and
assumes a throttling position with respect to its
seat as determined by the pressure in the outlet.
Any variation of the outlet pressure (caused, for
instance, by the turning-off of one or more of
tend to open.
the burners) produces corresponding variation
.'
-
'
2. In a ?uid control device: a casing having
a partition dividing it internally to form an inlet
and an outlet chamber, said partition having a
of the throttling condition of ' the regulator
closure so that the desired regulation of gas pres
sure at'the burners is effected.
port opening therethrough interconnecting said
It is to be noted particularly that when the
chambers; a ?rst ?exible diaphragm member clos
device is in ?ow-obstructing condition, as shown
ing an opening through a casing wall of 'said _
in the drawing, the regulator closure 28 is seated,
inlet chamber and having a portion forming a
so that ?ow through the device is subsequently
closure cooperable with the inlet end of
initiated by the opening of the regulator clo 65 ?rst
said port opening and biased theretoward; a
sure-ratherthan by the main closure constituted
second ?exible diaphragm member exterior of the
by the lower diaphragm member. In convention
casing and disposed in a plane substantially
al' ?uid pressure regulators, in distinction, the
parallel to that of the ?rst diaphragm member; '
closure is in fully-open position when the cbn
means joined to the casing and de?ning with said
dult between it and the ?uid source is closed, so
diaphragm members a pressure chamber there
between;
a second closure cooperable with the
surge of ?uid through the system before the’regu
outlet end of said port opening; means opera
lator closure can reach its throttling position.
tively connecting said second closure with said
. When the lower diaphragm member is in
second diaphragm member and sealingly extend
05
raised, or port-opening, position, the central area
ing through an opening in the ?rst diaphragm
of the underside oi’ the upper diaphragm r'memv
that upon initiation of flow there is a sudden
member; and means, including pilot valve means,
for ?uidly connecting said pressure chamber with
said inlet chamber in one position of the pilot
ber, inside of bellows 30, is subjected to the inlet
pressure,due to the clearance between stem‘ 21
and screw 20.‘ Since this-central, area of the
upper diaphragm member is approximatelyv equal 70 valve means, and with said outlet chamber in
another position of ‘the pilot valve means; the
to the area of regulator closure28 exposed to in
arrangement of said closures being such that,
let pressure, variation of inlet pressure does-not
with decrease of pressure in said pressure cham
affect the regulator and it therefore responds
solely to the outlet pressure.
-
4
When conditions are such that the main clo
75
ber, both of the closures tend to open.
3. In a ?uid control device: va casing having
2,412,490
5
,
a partition dividing it internally to form an inlet
and an outlet, said partition having a vertical
port opening therethrough interconnecting said
6
-
phragm member freely through said aperture and
said port opening and carrying at its lower end a
second closure engageable with the outlet one of
inlet and outlet: ‘a ?rst ?exible diaphragm mem
said valveseats; and means, including pilot valve
ber closing an opening through the top wall of (Fl means for ?uidly connecting said pressure cham
the'casing at the inlet thereof, a portion of said
ber with said inlet chamber in one position of the‘
?rst diaphragm member forming a ?rst closure .
pilot valve means, and with said outlet chamber
normally resting on the inlet end of said port
in another position of the pilot valve means.
opening. under the weight of the diaphragm
5. In a ?uid control device: a casing having
member; a ‘second diaphragm member overly 10 a partition dividing it internally to form an
ing the ?rst diaphragm member; means joined
inlet chamber extending to the top oi’ the cas
to the top wall of the casing and de?ning with
ing and an outlet chamber, said partition hav
said diaphragm members a pressure chamber
ing an elongated vertical port opening there
therebetween; a second closure cooperable with
through interconnecting said chambers and pro
the outlet end of said port opening; a stern con 15 viding at the inlet and the outlet ends of the
necting said second closure with said second dia
port opening a pair of opposed valve seats; a
phragm member, said stem extending freely
?rst ?exible diaphragm member closing an open
v through said port opening and sealingly through
ing through the top wall of the casing, a portion
van opening in the ?rst diaphragm member; and
of said ?rst diaphragm member forming a ?rst
means, including pilot valve means, for ?uidly 20 closure normally resting on the inlet one of said
connecting said pressure chamber with said inlet
valve seats under the weight of the diaphragm
in one position of the pilot valve means, and with
member; a second ?einble diaphragm'member
said outlet in another position of the pilot valve
overlying said ?rst diaphragm member; means
joined to the top wall of the'casing and de?ning
means.
v
'
.
4. In a ?uid control device: a casing having 25 with said diaphragm‘ members a pressure cham-\
a partition dividing it internally to form an inlet
ber therebetween; said ?rst diaphragm mem
chamber extending to the top of the casingland
ber having an aperture therethrough generally
an outlet chamber, said partition having an elon
on the axis of said port opening; a ?exible bellows
gated vertical port opening therethrough inter
surrounding said aperture and sealingly joined
connecting said chambers and providing at the
at its opposite ends to said diaphragm members,
inlet and the outlet ends of the port opening a,
the arrangement being such that a substantial
pair of opposed valve seats; a ?rst,_?exible dia
area of the underside of said second diaphragm
phragm member closing an opening through the
member is in communication, through said aper
top wall of the casing, a portion of said ?rst dia
ture, with said inlet chamber when said ?rst
phragm member forming a ?rst closure normally 35 closure is raised from its seat; a stem extending
resting on the inlet one of said valve seats under
from said second diaphragm member freely
the weight or the diaphragm member; a second
through said aperture and said port opening and
?exible diaphragm member overlying said ?rst
carrying at its lower end a second closure en
diaphragm member; means Joined to the top wall
gageable with the outlet one or said valve seats;
of the casing‘and de?ning with said diaphragm 40 and means, including pilot valve means, for ?uidly
members a pressure chamber therebetween: saidv
connecting said pressure chamber with said inlet
?rst diaphragm member having an aperture
chamber in one position of the pilot valve means,
therethrough generally on the axis of said port
and with said outlet chamber in another position
opening; yieldable means surrounding said aper
or the pilot valve means.
ture and sealingly joining said diaphragm mem
LAURENCE C. BIGGLE.
bers; a stem extending from said second dia-‘
Документ
Категория
Без категории
Просмотров
0
Размер файла
525 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа