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Патент USA US2404795

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Patented July 30, 1946
2,404,795
UNITED STATES PATENT OFFICE
2,404,7 95
FLOAT CONTROL VALVE
Owen L. Garretson, Bartlesville. Okla., assignor to
Phillips Petroleum Company, a corporation of
Delaware
Application November 16, 1943, Serial No. 510,521
7 Claims. (Cl. 137-68)
This invention relates to, ?oat control valves
and more particularly to liquid trap gas valves
in which any liquids occurring in rapidly ?owing
gas in a gas line may be prevented from passing
through the valve in any quantity.
Float control valves have been used for several
2
stem, valve stem-supporting bracket, and the ball
?oat are not in cross section.
Figure 2 is a plan view of the ball ?oat and.
the mechanical linkage connecting the ball ?oat
5 to the valve head, all other parts of the device
being eliminated.
years as a device to shut off the ?ow of gas in
case there is any carry-over of liquid from the
‘ vaporizer of an industrial gas system. They have
also been used on gas lines carrying gases which
Figure 3 is an elevational view of the valve
head stem-supporting bracket only, looking from
the left of Figure 1 to the right.
The illustrative embodiment shown in the
drawing consists of a valve housing I having a
chamber 2, an inlet 3 connected to chamber 2
and a valve receiving opening 4.
The inlet. 3 may be connected to the gas sup
may contain the gas in liquid form, moisture, or
foreign liquids. It has been found that during
periods of high rate of ?ow these valves of the
prior art close even though no liquid has accumu
lated in the ?oat bowl, due to the force exerted 15 plying portion of a gas line (not shown) by
by the gas on the valve because of the high pres
sure drop across the valve.
As the valve remains for long periods of time
in its open position there is a tendency for cor
rosion to set in, or for deposits of foreign sub
means of any suitable pipe connection, ?ange 5
being chosen as merely an example‘ of such a
suitable connection.
The chamber 2 is provided with a dependent,
20
liquid accumulating portion 6, this portion being
provided with a drain plug 1. A plug 8 is pro
vided on the upper part of housing I for purposes
to be explained below. A de?ecting ?n 9 is pro
position. The usual linkages employed in the
vided extending across chamber 2 to de?ect the
prior art devices are often unable to free the
valve with the available force provided by the 25 gas coming in inlet .3 so that it must pass down
into bowl chamber 2.
?oat.
stances or gummy material present in the gas
to cause the valve to stick or freeze in its open
The valve‘ receiving opening 4 is covered by
One object of this invention is to provide such
cover It] which may be secured in any suitable
a valve which cannot be closed by the gas alone,
manner, a gasket II and bolts I2 being shown
even though the velocity of the gas through the
valve is raised to many times that existing in 30 as an illustration. The cover has an outlet l3
and is connected to the gas receiving portion of
practice.
the gas line (not shown) by any suitable con
Another object of the invention is to provide
necting means of which ?ange I4 is merely an
a valve in which the ?oat exercises such a great
illustrative example.
'
mechanical advantages over the valve in its open
The cover I0 is provided with a screw plug [5
position that sticking of the valve in the open
position is practically impossible.
for purposes to be explained below and outlet [3
Another object is to provide a ?oat control
valve which continues to operate satisfactorily
at high rates of gas flow after long periods of
time by the closing of the valve in response to
is enlarged and screw threaded at IE to receive
a sharp edged valve seat ll. Valve seat I‘! is of
the ?oat only.
40
slightly smaller diameter internally than outlet
l3 for purposes to be explained below. Mounted
on cover In is a ?rst bracket l8 which may be
Another object is to provide such a valve which
mounted by such means as bolts IS. A second
is easily serviced and repaired, which has few,
strong and fool-proof parts, and in which the op
eration is simple and positive.
Other objects and advantages will be apparent
to those skilled in the art upon reading the fol
lowing speci?cation and claims and studying the
also be secured by bolts 2|.
Bracket I8 is also shown in Figure 3. Bracket
l8 may be provided with reinforcing rib 22 and
tapers at 23 to a narrower portion 24. In the
bracket 20 is also mounted on the cover and may
narrower vertical portion 24 a, hole 25 is cut
to act as a guide. While this guide hole may be
50 round or of any desired shape, I prefer to make
In .the drawing:
it in the form of a square which has its corners
Figure 1 is a cross-sectional elevational view
slabbed o? to form an octagonal shape. On the
of a valve embodying my invention, the cross
lower end of portion 24 is a T head 26 the outer
section being taken through the central portion
ends of which act as stop members as will be ex
drawing.
of the valve with the exception that the valve 55 plained later.
2,404,795
3
4
Bracket 20 is merely a simple pU bracket with
two arms projecting horizontally from It].
A valve head 21 is provided to seat on seat ll.
moved the ?rst part of the way from its open
position to its closed position without failure.
positive seal with the sharp edge on seat I‘! and
ring 28 is held in its groove by plate 29. Plate 29
It is therefore evident that I have provided
means whereby the force of the rapidly flowing
gas is unable to overcome the forces of friction
in the toggle formed by links 43 and arm 42 and
the mechanical advantage of ?oat39 in the open
is secured to the valve head 21'by any suitable
position and that the mechanical advantage of
Valve head 21 has a packing ring 28 set in an
annular groove in its face. Ring 28 forms a
?oat 33 is so great that sticking in the open posi
arms 30 are preferably formed integral with 10 tion is avoided.
Changes may be non-inventively made in the
plate 29, but may be held thereon by the same
proportion and arrangement of parts, and many
screw (not shown) that secures plate 29 to head
parts may have equivalents of an obvious nature
21. Head 21 is provided with a valve stem 3|.
’ substituted for them without involving invention,
To lighten the stem 3| a slot 32 has been cut
therein, but this slot is not necessary to the a; and the modi?ed valve will still be within the scope
means such as a screw (not shown) and guide
operation of the device. Stem 3|’ has an end
portion consisting of an octagonal portion 33
adapted to ?t hole 25 in bracket !8 for guiding
sliding motion therein. Beyond 33 the stem has
of my invention provided the invention is followed
perforation 36 therethrough and the extreme end
as set forth in the following claims.
It is obvious also that my valve is adapted for
use in any system employing a ?oat control valve
of this type, and when used in such systems it is
common to remove the plugs ‘I, 8 and I5 and at
of 34 is provided with an axial threaded bore
'into which a set screw 35 may be screwed to pro
tach pipes at theserpoints. The pipe attached in
place of drain plug 8 may run to a suitable pump,
‘ ject into the horizontal transverse bore 36.
which may be provided with a vapor outlet line
a circular portion 34 which has a horizontal
Pivotally mounted in the two arms of bracket
23 is a bell crank 3'5. A pivot pin 33 is provided
for this pivoting. A ?oat 39 is provided in the
dependent liquid accumulating portion 6 and is
secured to bell crank 3'! by suitable means 43. The
shape of the ?oat is immaterial, however a ball _
thereupon is probably most convenient. Bell
leading preferably back to the gas line leading to
inlet 3, and said pipe, or said vapor outlet line,
or both, may be provided with check valves pre
venting reverse ?ow back towards chamber 2.
Plugs 8 and I5 may be connected by a pipe con
taining a normally closed manual shut off valve,
and another normally open manual shut off valve
crank 3? becomes bifurcated and has two arms 4|
may be placed in the gas line leading from out
and 42. The ends of these two arms have out
let i3, the idea being that if the difference in gas
pressure between opposite sides of seat I‘! when
Wardly projecting rods 43 and 44 thereon which
actas pivots respectively, for connecting two links 0
43 and 46. After links 45 and 46 are placed over
projections 43 and 44, the connection may be com
head 2'! is seated is so great that the valve I1, 21
will not open, then by closing said shut off valve
in the gas line and opening said shut off valve in
the line between the openings at 8 and I5 the
pleted by washers and cotter pins as shown. Links
45 and 46 are preferably merely straight lengths
pressure will equalize, valve ll, 21 will open and a
with three holes in them and are connected at 40 the manual valves may be‘returned to‘their re
spective normal positions. The systems men
their outer ends by spacer bar 41 which has a bore
tioned in this paragraph are not shown in the
screw threaded at both ends to receive bolts 48
and 49.‘ A pin 53 is passed through the holes in
drawings but are mentioned to show the wide
links 46 and 45 and the hole 36 in stem 34 and pin.
field of use of the invention, and valves employed
'50 is secured in position by washers and cotter '7 in such systems are intended to be within the
scope of the following claims.
7
pins as shown. Bracket l8'beside guiding stem 33
also acts as a stop member as the projecting ends
Having described my invention, I claim:
1. A liquid trap gas valve fortrapping any
of T head 26 are so disposed as to contact either
liquids occurring in a gas line, comprising in
arms 4! and 42 of bell crank 31, or links 45 and
combination a valve housing having a chamber,
45, or both. While any of these contacts is suf?
said chamber having a dependent liquid accumu
cient, I prefer for purposes of stability to have
lating portion, an inlet connected to the gas
head 2-3 contact bell crank 31.
supplying portion of the gas line and to the
The operation of the device is as follows:
Gases enter inlet 3 and are deflected by 3 down
chamber, an outlet connecting the chamber to
into chamber 2. The gases pass rapidly through 55 the gas receiving portion of the gas line, a valve
chamber 2 and out around head 21 through seat
seat mounted in said outlet and extending into
i1 and outlet l3. No matter how rapidly these
the chamber, a valve head in the chamber adapt
gases pass, no matter how great the suction or
ed to seat on said seat in closed position and‘ close
the outlet and to move to open position and open
pressure on head 2? the valve cannot close be
cause the central line 5! between pins 50 and 38
the outlet, a lever mounted in pivotal relation
passes so close to pivot 43 that toggle action and
ship within the chamber, a ?oat’in said liquid
leverage prevents the valve from being closed by
accumulating portion secured-to said lever, said
the force of the gas, Float 39 is not very heavy
lever and valve head connected by a toggle link
but it has a certain weight action downwardly,
age, the float being normally actuated-by gravity
creating torque around pin 38, and it has a great
in the absence of su?‘lcient liquid in said liquid
accumulating portion to substantially straighten.
mechanical advantage over the forces tending to
force pins 50 and 38 together. In actual practice
out the toggle to substantially dead center posi
pivot 43 may be about one-sixteenth of an inch
tion and to move said valve to said open position,
the float being floated by any accumulating liq
past the central line 51 as bell crank 31 is sup
ported on T head 26.
70 uids in said liquid accumulating. portion to close
If valve 21 becomes stuck in open position and
said‘ valve, the substantially dead center position
of the toggle acting to give toggle action'whereby
liquid begins to accumulate in chamber 6, the
liquid will lift ball 39 and the ball will have a
great force is applied by. the ?oat to move the
toggle action providing a leverage of such great ;
head the ?rst part of the‘ way from open‘ po
mechanical advantage that valve head 21 will be 75 sition to closed position.
2,404,795
,
“5
v
2. A liquid trap gas valvefor trapping any
'ed on said cover and extending into the chamber,
liquids occurring in a gas line, comprising in
‘a valve head in the chamber adapted to seat on
combination a valve housing having a chamber,
said seat in closed position, and close the outlet
'said chamber having a dependent liquid accumu
lating portion, an inlet connected to the gas sup
plying portion of the gas line and to the chamber,
and to move to open position and open the out
let, guide means mounted on the face of said
head and guided in said seat, said ?rst bracket
having a guide and stop means thereon, a stem
an outlet connecting the chamber to the gas re
member on the rear of said head guided in said
ceiving portion of the gas line, a valve seat
guide, a second bracket‘mounted on said cover
,mounted in said outlet and extending into the
chamber, a valve head in the chamber adapted to 10 and extending into the chamber, a bell crank
lever pivoted to said second bracket, a ?oat in
seat on said seat in closed position and close the
said liquid accumulating portion secured to said
outlet and to move to open position and open the
outlet, at ?oat in said liquid accumulating por
lever,,link means pivoted to said lever and to
tion'connected to said valve head by a toggle
said stem member, said link means and said lever
linkage, the ?oat being normally actuated by 15 constituting a toggle, said stop‘means being in
the path of a portion of the toggle, the ?oat be
‘gravity in the absence of su?icient liquid in said
liquid accumulating portion to substantially
ing normally actuated by gravity in the absence
‘of su?‘icient liquid in said liquid accumulating
straighten out the toggle to substantially dead
center position and to move said valve to said
open position, the ?oat being ?oated by any
accumulating liquids in said liquid accumulating
portion to close said valve.
3. A liquid trap gas valve for trapping any
liquids occurring in rapidly ?owing gas in a gas
_‘ line, comprising in combination a valve housing
having a chamber, an inlet connected to the gas
portion to substantially straighten out thevtoggle
to substantially dead center position, to force a
portion of said toggle to rest on said stop, and to
move said valve to said open position, the ?oat
being ?oated by any accumulating liquids in said
liquid accumulating portion to close said valve,
the substantially dead center position of the tog
gle acting to give toggle action whereby great
force is applied by the ?oat to move the head
supplying portion of the gas line and to the
the ?rst part of the way from open position to
chamber, and a valve receiving opening, the
closed position.
chamber having a dependent liquid accumulating
5. A liquid trap gas valve for trapping any liq- ,
portion, drain means for the liquid accumulat 30
uids occurring, in rapidly ?owing gas in a gas line,
ing portion, a cover for the valve receiving open
comprising in combination a valve housing hav
ing, said cover having an outlet‘ connecting the
ing a chamber, an inlet connected to the gas sup
chamber to the gas receiving portion of the gas
plying portion of the gas line and to the'chamber,
line, a valve seat mounted in said outlet and ex
’ tending into the chamber, a ?rst bracket mounted 35 and a valve receiving opening, the chamber hav
ing a dependent liquid accumulating portion, a
on said cover and extending into the chamber, a
cover for the valve receiving opening, said cover
valve head in the chamber adapted to seat‘ on
having an outlet connecting the chamber to‘the
said seat in closed position and close the outlet
gas receiving portion of the gas line, a valve seat
and to move to open position and open the out
let, said ?rst bracket having a guide and stop 40 mounted in said outlet and extending into the
means thereon, a stem member on the rear of
chamber, a ?rst bracket mounted on said cover
and extending into the chamber, a valve head in
said head guided in said guide, a second bracket
the chamber adapted to seat on said seat in closed
mounted on said cover and extending into the
position and close the outlet and to move to- open
chamber, a bell crank lever pivoted to said sec
position and open the outlet, said ?rst bracket
ond bracket, a ?oat in said liquid accumulating
having a guide and stop means thereon, a stem
portion secured to said lever, a bifurcated end on
member on the rear of said head guided in said
said lever, link means pivoted to saidlever and
guide, a second bracket mounted on said cover
to said stem member, said link means and said
lever constituting a toggle, said stop means being
and extending into the chamber, a bell crank
in the path of a portion of the toggle, the ?oat 50 lever pivoted to said second bracket, a ?oat in
said liquid accumulating portion secured to said
being normally actuated by gravity in the absence
lever, link means pivoted to said lever and to
of su?icient liquid in said liquid accumulating
portion to substantially straighten out the toggle
said stem member, said link means and said lever
constituting a toggle, said stop means being in
to substantially dead center position, to force a
the path of a portion of the toggle, the ?oat being
portion of said toggle to rest on said stop, and to
normally actuated by gravity in the absence of
move said valve to said open position, the ?oat
su?icient liquid in said liquid accumulating por
being ?oated by any accumulating liquids in said
tion to substantially straighten out the toggle to
liquid accumulating portion to close said valve,
substantially dead center position, to force a por
the substantially dead center position of the
toggle acting to give toggle action whereby great 60 tion of said toggle to rest on said stop, and to
move said valve to said open position, the ?oat
force is applied by the ?oat to move the head
being ?oated by any accumulating liquids in said
the ?rst part of the way from open position to
closed position.
,
liquid accumulating portion to close said valve,
the substantially dead center position of the tog
4. A liquid trap gas valve for trapping any
liquids occurring in rapidly ?owing gas in a gas 65 gle acting to give toggle action whereby great
force is applied by the ?oat to move the head the
line, ‘comprising in combination a valve housing
?rst part of the way from open position to closed
having a chamber, an inlet connected to the gas
position.
supplying portion of the gas line and to the
6. A liquid trap gas valve for trapping any liq
chamber, and a valve receiving opening, the
chamber having a, dependent liquid accumulat 70 uids occurring in rapidly ?owing gas in a gas
line, comprising in combination a valve housing
ing portion, a cover for the valve receiving open
having a chamber, an inlet connected to the gas
ing, said cover having an outlet connecting the
supplying portion of the gas line and to the
chamber to the gas receiving portion of the gas
chamber, and a valve receiving opening, the
line, a valve seat mounted in said outlet and ex
tending into the chamber, a ?rst bracket mount 75 chamber having a dependent 1iquid accumulating
2,404,795
'8
portion, drain means for the liquid accumulating
comprising in combination a valve housing hav
ing a chamber, an inlet connected to the gas sup
plying portion of the gas line and to the cham
her, and a valve receiving opening, the chamber
portion, a cover for the valve receiving opening,
said cover having an outlet connecting the cham
ber to the gas receiving portion of the gas line,
a valve seat-mounted in said outlet and extending 27 having a dependent liquid accumulating portion,
a cover for the valve receiving opening, said cover
into the chamber, a ?rst bracket mounted on
having an outlet connecting the chamber to the
said cover and extending into the chamber, a
gas receiving portion of the gas line, a valve seat
Valve head in the chamber adapted to seat on
mounted in said outlet and extending into the
said seat in closed position and close the outlet
chamber, a ?rst bracket mounted on said cover
and to move to open position and open the out
and extending into the chamber, a valve head
let, guide means mounted on the face of said
in the chamber adapted to seat on said seat in
head and guided in said seat, said ?rst bracket
closed position and close the outlet and to move
having a guide and stop means thereon, a stem
to open position and open the outlet, said ?rst
member on the rear of said head guided in said
guide, a second bracket mounted on said cover 15 bracket having a guide and stop means thereon,
a stem member on the rear of said head guided
and extending into the chamber, a lever pivoted
in said guide, a second bracket mounted on said
to said second bracket, a ?oat in said liquid ac
cover and extending into the chamber, a lever
cumulating portion secured‘to said lever, a bifur
pivoted to said second bracket, 5], ?oat in said liq
cated end on said lever, link means pivoted to
uid accumulating portion secured to said lever,
said lever and to said stem member, ‘said link
link means pivoted to said lever and to said stem
means and said lever constituting a toggle, said
member, said link means and said lever constitut
stop means being in the path of a portion of the
toggle, the ?oat being normally actuated ‘by grav
ity in the absence of suf?-cient liquid in said liquid
accumulating portion to substantially straighten
out the toggle to substantially dead center posi
tion, to force a portion of said toggle to rest on
said stop, and to move said valve to said open
position, the ?oat being ?oated by any accumu
lating liquids in said liquid accumulating portion
to close said valve, the substantially dead center
position of the toggle acting to give toggle action
whereby great force is applied by the ?oat to move
the head the ?rst part of the way from open posi
tion to closed position.
7. A liquid trap gas valve for trapping any liq
uids occurring in rapidly ?owing gas in a gas line,
ing a toggle, said stop means being in the path
of a portion of the toggle, the ?oat being normally
actuated by gravity in the absence of suf?cient
liquid in said liquid accumulating portion to sub
stantially straighten out the toggle to substan- '
tially dead center position, to force a portion of
said toggle to rest onv said stop,‘ and‘ to move said
30 valve to said open position, the ?oat being ?oated
by any accumulating liquids in said liquid accu;
mulating portion to close said valve, the substan
tially dead center position of the toggle acting to
give toggle action whereby great force is applied
to Ui by the ?oat to move the head the ?rst part of
the way from open position to closed position.
,
OWEN L. GARRETSON.
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