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Патент USA US2404087

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Jy 16, 1946.
- 2,404,087
Filed March 15, 1945
‘am ,
63. @%
Patented July 16, 1946
Harrison 0. Parsons, Houston, Tex.
Application March 13, 1945, Serial No. 582,558 .
Q i.
. .,
ries ,valves which will h reafter ‘be described-‘
greater detailand secured to the lower end or
gauging tube 16 is tubular member B which also
This invention relates to _a device for gauging
and sampling liquids ‘stored in aclosed container
under superatmospheric conditions. ‘The device
of'the present invention is particularly adapt
carries a valve which will be described in greater
able to portable containers such as railroad tank
_ The invention andits scope may befully un
in which
porated therein, is" secured to thebase‘member
by screw threads 22 arrangedjto engage corre:
derstood from the following description read
in conjunction with the accompanying drawing
ber 14.. Cap 2|, of suitable dimensions to cover
head member A and the valve members incor-'
is provided with a plurality of valve means ar
ranged to prevent loss of liquid from the con
jured or destroyed by accident.
20 is attached to the upper surface of base mem:
hydrocarbons under relatively high pressures and
tainer ‘even though parts of the device are in
A safety hook and sighting level screw member
cars which are ‘used for transporting lique?ed
sponding threads formed on the base member.‘
A passage 23 is formed in base member l4 and
arranged to vent the space enclosed by .cap 2]“
15 to the atmosphere as the cap is being disen
gaged from the head member.
" Figs. 1 and 2 together constitute a side veleva
Head member A is secured to the upperend
gauging tube [6 by mating screw threads“;
of' the present invention;
Head member A may be said to be of a‘generally
Fig. l‘showing the upper portionv and Fig. 2
thelower portion of the device;
20 tubular shape and de?nes a central passage 13
provided with a circular inwardly extendingledge
Fig.3 isa fragmentary view of a portion of the
25 arranged some distance above ,the upper end
mechanism of Fig. l with the view taken at 90°
tion, with parts broken away, of, an embodiment
of gauge rod l6. Ledge 25 forms ‘a restfor
valve member 26: which is mounted in the cen-j
tral passage belowledge 25 and is providedwith
Fig. 74 is a view .taken along line IV-—IVv of
Referring now speci?cally to the drawing, a
coupling memberj II' is arranged to‘ be secured
~ a conically formed upper surfaceadapted to oo
operate with ledge 25. vValve member 26 is biased
upwardly against ledge 25 by spring 21. It will
to the top wall of a container. The Walls of the
be noted that the upper end ofspring 2ljdoes
container are not shown since the construction
of storage tanks suitable for storing liquids under 30 not itself come into contact with valve-member
26, but instead bears on a spring retainer;mem-'
superatmospheric pressure is conventional to the
ber 28 which is shaped to allow the ?ow of ?uid
art and it will be understood that coupling mem
through passage [3. Spring retainer members 28
ber ll is secured to the wall of a container ‘in a
forces the valve. member. 26 againstthe circular
suitable ?uid-tight ‘manner; Coupling member
ledge 25.
ll de?nes a vertically extending .1 passage 12.
Fitting upon coupling member I l' is a base mem
ber 14 which is secured to the coupling member
‘in avfluid-tight manner. In the drawing mating
screw threads [5 are‘ shown as the means for
securing the base member to the coupling mem
Mounted on the upper end of head member 1A
is a bonnet 29 provided with a valve stem 30
which in turn is surmounted by hand wheel 3];
The space between bonnet 29 and stem 3|] is
40 controlled by packing 32 held in place by stuf?ng
box nut 33. The valve stem 30 (may be moved
downwardly by rotation of hand wheel 3| and
upon engagement of the lower end of valve stem
in a_fluid-tight manner, such as by the use of
30 with valve member 26 the valve member ‘is
cap screws, may be employed.
» Base member l4 de?nes a vertically extending 45 pushed away from circular ledge 25 so that fluid
may flow through central passage l3.‘ Valve stem
central passage in which . gauging‘ tube [6 is
30. is provided ‘with left-handedvthreads'. ‘The
slidably arranged. Gauging tube H5 is provided
reason ‘for this isthat conventional valves-are
with suitable calibrations ID; A tapering seat
opened by turning counterclockwise“andgclosed
.I'! isv de?ned by ‘base. member [4 adjacent the
lower end of the central passage; Base member 50 by turning clockwise. If stem 30 were provided
with right-handed threads, its operation would
I4. is additionally provided with packing l8 and
be the reverse of that of conventional valves.
packing gland l9 which is arranged to prevent
ber. It will be understood, however, that other
suitable means for attaching the two members
Consequently, ‘it is convenient td employ left-i
loss of ?uid vbetween gauging tube l5 and the
base member.
Secured to the upper end of.
gauging tube vIii-is a head member A which car
handed threads
in this
Above circular shoulder 25 central passage I3
is connected with a port 34 which extends at
therewith and close the central passage when the
right angles to passage l3. Port 34 discharges
ball is in its uppermost position. A spring 53 is
into a passage 35 which is of substantially larger
arranged in the central passage between plug 50
diameter than port 34. Within passage 35 is
and ball 52 and biases the ball upwardly against
seated a valve 36 which is in the form of a screw 5 seat 5|.
thread plug having a conical projection 31 at its
A rod 54 is slidingly arranged in passage 49 of
forward end which is adapted to seat at the outer
gauge member | 6 with the dimensions of the rod
end of port 34. The ?uid passage through the
and passage such that an annulus is provided
valve 36 begins at the base of the conical pro
through which ?uid can flow. The upper end of
jection and passes through the center ‘of the plug. 10 rod member 54 is attached to spring retainer 28
The outer end of the plug is provided with a cir
by suitable means such as screw threads 54'.
cumferential shoulder 38 adapted to abut against
.Rod 54 is of such length that when valve mem
a ledge 39, in this case the head of a screw, to
ber 26 engages with the seat de?ned by ledge
limit outward motion of the plug. The plug 36 is
.25 the lower end of the rod is above ball 52 but
of such dimensions that when it is in closed po 15 when valve member 26 is forced downwardly away
sition its outer end is flush with the inside sur
from ledge 25, the lower end of rod 54 comes
face of cap 2|, that is to say, that cap 2| cannot
.in contact with ball 52 and. forces it downwardly
be screwed into place unless the valve 36 is in
away from seat 5|. In other words, the rotation
closed position.
of hand wheel 3| to move stem 30 downwardly
Secured to head member A is laterally extend
?rst forces member 26 away from its seat and
ing rod 40 arranged to cooperate with safety
opens the upper valve and additional rotation
hook and sighting level member 28. It will be
forces ball 52 away from its seat and opens the
seen that the upper end of member 20 de?nes a
lower valve.
hook designated by numeral 4 |. When the gauge
rod is lowered into the container with member
A’ adjacent stul?ng box l9, rod 40 is below the
lower surface of hook 4|. It will be apparent
that the head member A may be rotated with re~
spect to base member | 4. When head member
A is in the position shown in Fig. 4, rod 49 is en
gaged with the hook portion 4| of the safety
hook and sighting level ‘member 26 and when
thus engaged ‘head A is locked against upward
movement. If the head A is moved in a counter
clockwise direction from the position shown in
Fig. 4 the rod 40 becomes disengaged from hook
member 4| and thereafter head A is free to move
in-a vertical direction. It will be observed that
the. central passage through which gauge mem
The lower portion of member B at a point
below side ports 4'! is enlarged to form a ‘shoulder
which is provided with a surface 55 tapering out
wardly and downwardly and of such a shape that
when brought into contact with seat I‘! it en
gages therewith to form a ?uid-tight seal.
Spaced slightly below seat 55 is an outwardly ex
tending circular ledge 55. .A spring 57 is se
cured to the lower surface of base member M with
its upper end secured to the base member and
its lower end secured to an annulus 58 of sub
stantially the same diameter as ledge 56. The
arrangement of spring 5'1‘, annulus 58 and ledge
56 is for absorbing the shock in the event a high
pressure within the container drives gauging tube
|6 upwardly.
ber 16 is adapted to slide is slightly eccentric with 40
The arrangement of seat 55 of member B and
respect to the screw threads 22 arranged for se
seat I‘! of base member I4 allows packing 18 to
curing cap 2| to base member I4. This arrange
be renewed without releasing the pressure from
ment requires that rod 46 be immediately be
the container. If it is found desirable to add
low hook ‘4| before cap 2| can be screwed into
additional packing I8 or to renew packing |8
position and prevents gauge member '| 6 from be- .‘. while under pressure, the gauging tube l6 may be
ing forced upwardly by pressure in the container
drawn upwardly until tapering surface 55 en
as long as cap 2| is in position on base mem
gages seat l‘! and forms a ?uid-tight seal at the
ber M. A bail 42 is pivotally mounted on head
lower end of the central passage of base mem
A; A recess 43 is provided in the bail and adapt
ber l4. After surfaces 55 and I1 have been
ed to receive valve stem 30 when valve 26 .is
brought into engagement, stu?ing box gland l9
in a closed position. One ‘end of ball 42 is pro
may be removed, packing vl8 replaced and the
vided with a lug 44 adapted to abut against .stop
stuf?ng box nut .|9 returned into position with
45 arranged in head A ‘to limit the movement of
out releasing pressure from the container.
the bail. 1. Bail 42 'is of such shape and dimension
The device ‘of the present invention may be
that it is capable of only slight movement from
employed to determine the liquid level in the con
its vertical position when cap 2| is in place in
tainer in the following manner. Cap 2| is re
asmuch as one side of the bail sets fairly snugly
moved from base member l4 and head member
against the side wall of cap 2| when the bail
A rotateduntil rod 40 clears hook member 4|.
is in vertical position. The dimensions of the bail
The valve means with which the device is pro
are such that it cannot be placed in a vertical
videdmay then be opened by rotating hand wheel
position unless valve 26 is in closed position.
3-! to move valve stem downwardly and force
Consequently, the bail prevents the setting of
valve members 26 and .52 from their respective
cap 2| in place unless valve 26 .is in closed posi
seats. Valve member 36 may then be opened.
The superatmospheric pressure in the container
' Member B is secured to the lower end of 65 will then cause ?uid to pass upwardly through
gauge tube It; by ‘suitable screw threads 46. Side
the passage de?ned by ports 41, passages 48 and
ports 4'! provide communication between the ex
49, port 34 and passage 35. The gauge member
terior of member B and a central passage 43
I6 is moved vertically to determine the lever at
thereof. The upper end of passage 48 commu
which liquid discharges and above which vapors
nicates with a corresponding central passage 49 70 are discharged; at this point it is known that
in gauge member l6 while the lower end of pas
ports 4'! have been lowered to the liquid level
sage 48 is closed by a suitable vplug 50. Member
and a reading may be taken on scale II].
B de?nes a valve seat 5| in passage 148 at a point
It will be understood that the upper surface of
above the side ports and arranged below the
the hook portion 4| of safety hook and sighting
seatis ball 52 which is adapted to cooperate 75 level member 20 may’ be used to de?ne theline
of sight when reading the graduations of scale
l0 when determining the liquid level in the con
2. A gauge suitable for determining the level
of liquid in a container under superatmospheric
tainer. ,
pressure comprising, in combination, a base mem
ber adapted to be secured to the container and
The device of the present invention is particu
larly advantageous for the handling of low mole
cular weight hydrocarbons such as butane or
mixtures" including substantial amounts of bu
tane or: light hydrocarbons. If water is present
in the material being gauged, the refrigeration
de?ning a vertically extending passage with a
seat on the lower surface of the base member
adjacent the lower end of the ‘passage, an elon
gated body having a longitudinal passage extend
ing therethrough, said body being slidably ar
caused by the release of the vapors to the atmos 10 ranged in the passage de?ned by the base mem
phere may cause the upper portion of the gaug
ber, a packing means arranged to seal the space
ing device to become frozen. In the arrangement
between the base member and the elongated body,
of the present invention, the valve placed in
member‘ B remains submerged in the liquid of
the container and at a su?iciently high tempera
ture to‘ prevent freezing thereof. The arrange
ment of the present invention has the dual ad
vantages that if an accident occurs to the valve
head A to render the valve in the upper end of
the device useless, the lower valve in member B
an outwardly extending shoulder carried ‘by the
lower end of said elongated body and ‘de?ning
an upper surface adapted to cooperate with the
seat de?ned by the base member to seal the pas-V
sage de?ned by the base member when said‘ shoul
der is brought into contact with the base mem
ber, a, lower valve seat and an upper valve seat
through which the longitudinal passage extends ,
remains operable and in, addition the freezing
de?ned in the lower and upper ends of the elon
effects sometimes encountered with respect to
gated body respectively, a ?rst valve member
the valve at the upper end of the device when
carried by the elongated body adjacent the lower
releasing high pressure vapors to the atmosphere
valve seat, means biasing said ?rst valve mem
do not prevent the lower valve from being oper 25 ber against said valve seat, a second valve mem
ber arranged in the elongated body adjacent the
Having fully described the device of the present
upper valve seat, means biasing the second valve
invention, what I desire to claim is:
member against the upper valve seat, a valve
1. A gauge suitable for determining‘ the level
stem mounted in the upper end of said elongated
of liquid‘ in a container under superatmospheric 30 body and arranged for movement with respect
pressure comprising, in combination, a base mem
thereto for forcing said second valve member
ber de?ning an opening, an elongated body hav
away from the upper valve seat and a rod mem
ing a “longitudinal passage extending there
ber mounted in the elongated passage between
through slidably arranged in the opening in said
the ?rst and second valve members and arranged
base member, packing means arranged to seal the 85 to force the ?rst valve member away from the
space between the base member and the elongated
lower valve seat upon movement of the second
body, a valve seat de?ned in the lower end of
valve member away from the upper valve seat.
said elongated body through which said passage
3. A device in accordance with claim 2 in which
extends, a valve seat de?ned in the upper end ,
a gland is secured to the base member adjacent
of the body through which the passage extends, 40 the upper end of the passage de?ned by the base
a ?rst valve member arranged in the passage ad
member to hold said packing means in posi
jacentthe lower valve seat, means biasing said
?rst valve member against said valve seat, a sec
4. A device in accordance with claim 2 in which
ond valve member arranged in the bod;r adjacent
a packing gland member is secured to the upper
the upper valve seat, means biasing the second 45 portion of the base member adjacent the central
valve member against the upper valve seat, a
passage de?ned by the base member to secure the
valve ‘stem mounted on the upper end of said
packing means in position and in which the pas
elongatedabody and arranged for movement with
respect thereto for forcing said second valve
sage de?ned by the elongated body above the
upper valve seat discharges to the atmosphere
member away from the upper valve seat and a 50 and de?nes a third valve seat and a third valve
rod member mounted in the elongated passage
between the ?rst and second valve members and
arranged to force the ?rst valve member away
from the lower valve seat upon movement of the
second valve member away from the upper valve 55
member mounted on the elongated member to
seal said third valve seat.
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