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Патент USA US2131025

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Sept. 27, 1938;
‘
P, F, bANE'L
‘ 2,131,025 .
AUTOMATIC ROTARY VALVE
Filed May 7, 1936
.
P. F.
DANEL
(301447, A“? f%.
Patented Sept. 27,1938
2,131,025
4 UNITED STATES
‘
'PATE NT‘ OFFICE
~i!\,131,025
AUTOMATIC ROTARY VALVE
Pierre Francois Danel, Grenoble, France, assign
or to Ateliers
& Piccard-Pictet,
'- a corporation Neyret-Beylier
of
France
,
'
Applicagon _May 7, 1936, Serial No. 78515
France September 30. 1933 f
9' Claims. (Cl. 137-68)
(Granted under the provisions
of sec. 14, act of
March 2, 1927; 357 0. G. 5)
This application is a continuation-in-part of
Fig. 4 shows in elevation another form of con
my pending United States application, Serial No.
v746,293, ?ied October 1, 1934. ,
‘
struction oi.’ the automatic valve according to the
This invention concerns a rotary valve, asa invention in which the water in vessel D is regu
butter?y or wicket
' '
lated
the same level as the axis
v10
pressures.
_
The hydraulic torque M on the stem of a rotary
valve is practically represented by the formula
M=KV7D3>
?xed on the lever A2, its position
being slidably adjustable. The ?oat is ?xed at
.
.
where V is the Velocityin the upstream penstock
each position for instance by a screw E. The con
stant discharge may be thus varied by modifying l0
the setting of the ?oat on the ‘arm A2.
For each type of rotary valve the proper vari
ation of K with angular setting should be ascer- '
or pipe, D is a characteristic dimension of the ' tained from theory or experiments.
Provision should be made for minimizing fric
valve, and K is a numerical coe?lcient which, with
given units, is only a function of the angular posi
tion of the rotary valve.
tion and a dash pot can be used to prevent hunt
ing with sudden variation in pressure.
Under varying pressure condition, if the valve
charge in the forms of construction shown in
Figs. 1, 2, and 3 may be varied.
20 is used to control the ?ow to a constant value,
vthe hydraulic torque on the valve stem will be
simply proportional to K as long as, for constant
?ow, the penstock velocity V is constant.
.
a It is obvious that the value of the constant dis
the ?oat or the weight.
-
I claim:
-
.\>
I
c _
-
The rotary valves‘ constructed according to the
invention embody means whereby,at every angu
1. Valve mechanism for a hydraulic conduit,
comprising a disc pivoted in the conduit about a
lar setting, a torque proportional to K is opposed median axis and tending to be closed by the mo
to the hydraulic torque. The‘discharge is then ment of the hydraulic pressure on said valve, a
automatically constant whatever the pressure var- - constant level tank adjacent the hydraulic con~
duit, a ?oat with a variable degree of immersion
30
in said tank,‘ a lever connecting said ?oat to said
25
axis, the hydraulic torque of the
axis being balanced by said ?oat at
setting, the ?oat being connected to
shaped to obtain a constant ?ow
35
valve.
'
disc on said
each angular
the lever and
through the
\
2,.“ Valve mechanism for a hydraulic conduit,
vessel ' comprising a disc pivoted in the conduit about a
from a leakage through the bearing ofsaid
the stem. ' median axis and tending to be closed by the mo
The torque from the ?oat, conveniently shaped, ment of the hydraulic pressure on said valve, a
40 depends obviously of the ?oat being more or less constant level tank adjacent the hydraulic con
submerged. In these?gures, the water ?ows from
left to right and tends
counter-clockwise direction to close
buoyant action of ?oat C.
45 I Fig. 3 shows in elevation another form of con
- ,
struction' of the automatic valve according to the '
duit, a ?oat with a variable degree 01' immersion
in said tank, a lever connecting said ?oat to said
axis, the hydraulic torque of the disc on said axis
being balanced by said ?oat at each angular set
ting, the ?oat being connected to the lever and
shaped to’ obtain a constant ?ow through the
valve, the said ?oat being changeable in order to
modify the value of the constant ?ow.
>
3. Valve mechanism‘ for a hydraulic conduit,
comprising a disc pivoted in the conduit about a
median axis and tending to be closed by the mo
ment or the hydraulic pressure on said valve, 9. 50
correct torque at each angular. position of the‘
adjacent the hydraulic con
disc. With this form 01' invention the actual size
variabledesree of immersion
of the ?oat may be less than in that of Figs. ‘1-2. _ in said tank, a lever connecting said ?oat to said
axis, the hydraulic torque of the disc on said 55,
20
2,131,025
2
including a shaft for mounting said valve for piv
otal movement about a median axis, the ?ow of
water through said conduit tending to close said
valve, said shaft extending through the vi all of the
conduit, a lever carried by said shaft, a tank posi
tioned adjacent said conduit and adapted to con
“axis being opposed by t at of a weight hanging at
the end of the said lever, the saidv?oa't being con
nected to the lever and acting against the weight
in order to obtain a constant ?ow through the
valve.
-
, 4. Valve mechanism for a hydraulic conduit,
comprising a disc pivoted in the conduit about a
tain a body of water of constant level, a variably
immersible ?oat supported by the water in said
tank, and means connecting the free end of said
median axis and tending to be closed by the
moment of the-hydraulic pressure on said valve,
a'constant level tank adjacent the hydraulic con
duit, a ?oat with a variable degree of immersion
_ lever to said ?oat.
10
. 8. A valve mechanism for a hydraulic conduit,
comprising a disc positioned in the conduit, means
in said tank, a lever connecting said ?oat to said including a shaft for mounting said valve for piv
axis, aweight hanging on the end of said lever otal movement about a median axis, the ?ow of
for opposing the hydraulic torque of the disc on' water through said conduit tending to close said 15
axis, the said ?oat being connected to the _ valve, said shaft extending through the wall of
15 ‘said
.lever'and acting against the weight in order to the conduit, a lever carried by said shaft, a tank
obtain a constant ?ow through the valve, thesaid positioned adjacent said conduit and adapted to
?oat being changeable in order to modify the contain a body of water of constant level, and a
value of the constant ?ow.
,
float supported by the water in said tank and .iiit
5. Valve mechanism for a hydraulic conduit, slidably mounted on said lever for opposing the
2%
comprising a disc pivoted in the conduit about a hydraulic force tending to close the valve, the
median axis and tending to be closed by the mo
?oat being constructed to exert a force balancing
ment of the hydraulic pressure on said valve, a the ?ow force tending to 'close said valve to main
tank adjacent the hydraulic conduit with its water tain a substantially constant discharge through 25
surface regulated at the axis level, a ?oat with a
variable degree‘ of immersion in said tank, a bent the9. conduit.
A valve mechanism for a hydraulic conduit,
lever connecting said ?oat to said axis, said ?oat comprising a disc positioned in the conduit, means
being mounted on said lever, the hydraulic torque including a shaft for mounting said valve for piv
of the disc on said axis being thus balanced at otal movement about a median axis, the ?ow of
each angular setting in order to obtain a con
water through said conduit tending to close said
stant ?ow through the valve.
valve,,said shaft extending through the wall oi
6. Valve mechanism for a’ hydraulic conduit,‘ thev conduit, a lever carried by said shaft, a tank
comprising a disc pivoted in the conduit about a positioned adjacent said conduit and adapted to
median axis and tending to be closed by the mo
contain a body of water of constant level, a ?oat
ment ‘of the hydraulic pressure on said valve, a supported by the water in said tank and slidably
tank adjacent the hydraulic conduit with its. mounted on said lever for opposing the hydraulic
water surface regulated at the axis level, a ?oat force tending to close the valve, the ?oat being
with a variable degree of immersion in said tank, constructed to exert a force balancing the ?ow
a bent’ lever connecting said ?oat to said axis, force tending to close said valve to maintain a 40'
said ?oat being slidably adjustable on the lever,
40 the hydraulic torque of the disc on said axis being substantially constant'discharge through the con
duit, and means for securing the ?oat in adjusted
thus balanced at each angular setting in order to
positions on said lever.
obtain a constant ?ow through the valve.
45
' 7. A_ valve mechanism for a hydraulic conduit,
comprising a disc positioned in the conduit, means
PERRE FRANCOIS
45
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