Regulating device acting by regulation of the pressure of a fluid.

PATENT AS AFRICAN AND MALAGASY

INDUSTRIAL PROPERTY

P. 8B7

yaoundê (Cameroon) International Patent Classification : GRAMS 05 NO. 03198

THE O. HAS. M-I-P>.

30 REQUESTS THE December 1969 to 17 hr 20 min the oamoam.p.i. (G.P. № 53,819) by

sAL companies said: ENTREPEISE searches and ACTTVITESPETROUERES-to-eIF & Bertin's and a CIE S.A..

residing in France.

DELIVERED THE 15 December 1970

PRIORITY : Patent application filed in France under the no. 182,515 31 December 1968 to names of applicants.

Regulator device acting by regulating the pressure of a fluid.

the present invention provides improvements to devices * regulators acting by regulating the admission pressure * a fluid whose pressure generator is variablei

5 the present invention includes regulator device comprising in combination a sensor of the variation of a physical quantity whose displacement causes by mechanical means an obstacle variably positioned at the opening of the jet power stream diverter having loads collected is amplified to provide an output pressure that can control a pneumatic device acting on the physical quantity considered *

According to inventién * the device can adjust, depending on the type of organ receiver connected * either the flow, the outlet pressure is a running ^ quiavantageusement input mechanical motion, may be provided by a pressure responsive member *

Still according to the invention, the setpoint_F. as well as the sensitivity of d * are adjustable independently of each other *

According 1' invent10 η 4 the device may operate either proportionally * ^ bang " following use *

According to the invention * the device may be slaved to a direct operation>inverted U * F.

The device according to the invention can be combined on one hand₅ at any sensor of a variation of a physical quantity, * which can be exemplified by a pressure, a flow rate, a niveauj. the mth temperature, a speed, and c ***, so displacing said sensor and secondly, at any pneumatic device operable on the physical magnitude considered *

The description which will follow opposite of attached drawings given as non-limiting examples, will further oomment the invention may be practiced.

Figure 1 is a schematic view of the device according to the invention.

figure 2 is a section across II-II Figure 5 of an embodiment of a diverter * d-GET.

figure 3 is a section across III iii of Figure 2,

figure 4 is a plan view magnifying glass as an IT-IV of Figure 5 of one embodiment of a power stage of fluidic amplifier₄

figure 5 is a view in|oupe next V-V delay of Figure 4î

fig. 6 is a view TMs çoupe in the detail A of Figure 1|and showing the mechanical linkage between the sensor and the obstacle cooperating with the LS deviator jet.

figure 7 is a perspective view of the detail AIs

figure 8 is a nomogram based on pressure generator IQ and demand pressure w ^.

figure 9 estest.un graph showing the development of the cam_I

the fluid which it is desired to adjust the pressure (included L) is from an enclosure 1 at which a pressure generator varying IQ, borrows a conduit 2 whose downstream end is provided with a throttle valve 3 and the conduit 4 of use_I the conduit using 4 has a pressure port connected via a line 5 6 7 deformation to a system known per se, for example a bellows cooperating with a steel blade or a tube called "gauge".

the upstream end 8 of the deformable system 7 (see especially Figures 6 and 7) is secured, by means of a spacer 9? of the wall 11 of a housing 12, the attachment being by any suitable means such as a screw 13 *

the downstream end 14 of the system to deformation is movable under the action of the fluid fed through the conduit 6. On this end 14 is fixed a plate 15 along its plane of symmetry, on which rests, substantially in said plane of symmetry, an axis 16 guided by a bearing 17 integral with a partition wall 18 of the housing.

The axis 16 is provided on either side of the bearing 17 respectively of a lever 19 and d ** the lever 21 a tray 19 cooperates on the other hand with the plate 15 by a finger 22 bears constant with said plate due to the action of a spring 23 tractien attached, on the one hand lever 19 and in the plane of symmetry of the plate 15. It may be noted that the lever 19 can assume two positions relative to the plane of symmetry than plate 15 (shown in continuous line and provides mixed in Figure 7), depending on whether it is located on one side or the other of the plate, SSO configurations which enable operations respectively in forward or reverse will be elucidated in more detail subsequently.

The tray 21 cooperates with a wheel 24 by way of a roller 25 whose position relative to the tray 21 and the wheel 24 can be varied by moving adjusting means such as a threaded rod 27 provided with, for example a knurled knob 28 and screwed into a boss 26 of the housing 12.

The wheel 24 is slidably mounted on a pivot 29 resting on ball bearings 31 and 32 respectively integral with the partition 18 and the wall 33 of the housing. This wheel 24 is provided by a ring 34 secured by a brace 35, and having mortises 36 formed therein which are cooperating pins 37 of a disk 38 secured by a cotter pin 39 29" in the spacer 35 is arranged a compression spring 41 tends to space the wheel 24 of the disk 38 and so hold it in contact with the roller 25 itself in contact with the tray 21 * a narrows 42 allows jj.eu catching up with the existing between the wheel 24 and the disk 38, on the disk 38 is attached a cam 43 whose periphery forms an obstacle to the opening of the varying power jet stream diverter 44.

This cam, which Figure 9 represents the developed, it is to say the distance from the center d_ depending on the angle at the center ^_#grée progressive an obstacle between two bearings 45 and 46,

the wheel 24 which, in the operating position is in contact with the roller 25 ., can be detached from said roller by the apparatus as claimed * so as to adjust the sensitivity of the device.

A lever articulated in 47 48 49 on an extension of the, partition 18 is loaded, the d * on the one hand by a spring 51 normally works in compression and fixed in the lever 52 and 53 to the partition and by the end of a ram 54 55 guided through a bore formed in a boss 56 of the partition 18 and whose other end is in contact with the end of a screw 57 engages in the wall of the housing 11.

When operating the screw 57, the action of the spring 51 becomes predominant, the lever is pivoted about the hinge 47 48 and rests, via the roller 58 on the wheel 24 "the force of the narrows 51 removing greater than that of the spring 41, the wheel 24 slides on the pivot 29 and approaches the disk 38 pivoting away from the roller 25 which can in this way maneuver aisementi most, translation of the wheel 24 permits contact of this wheel with a beveled pinion ITO a conical friction rèue 59, 61 whose axis passes through the partition 18 and is held in position by a shoulder 62 and a compression spring 63, supported on the U" pinion gear meshing with a bend 64 65 66 whose axis pivots in the bores 67 and 68 respectively formed in the wall 11 and the partition 18 * one end of said shaft is provided with a knurled knob 69" the invention can adjust the device to a reference pressure *

the logic circuit is supplied (Figure 1 and 2) by a pressurized fluid source provides the fluid 71, in the enclosures 72, 73 and 74 by a conduit 75 with a pressure reducer 76. the chambers 72, 73 and 74 are advantageously in series and communicate via ports charge loss or diaphragms 77 and 78 so that the first casing 72 has the. the higher pressure and that the last 74, the lower pressure,

the enclosure 74, whose pressure is lowest powered the conduit 79 a nozzle 81 of a stream diverter 82 (fig. 2) to fluid whose use channel 83 is disposed substantially in the extension but discontinuously and in the axis of said nozzle. This channel using two-dimensional 83 is divergent towards the outlet conduit 84 and, for example•* delimited laterally by molding by a protrusion of the plate 86 to which is secured another plate 87 in a manner known per se *

the space between the two plates and the outward protrusion is connected to the surround 1 *.

Perpendicular to the axis and at the opening of the nozzle 81, a recess 88 formed in the two plates 86 and 87 enables the implementation of the RT 43 * this cam 43 whose developed the periphery has been represented in Figure 9, more mask>^ U-least the outlet of the tuyere erée 81 and a great obstacle variable. Jet emitted by said nozzle * that obstacle deflects said jet in proportion to its engagement * the use channel 83 of the flow deflector is connected by the conduit 112 to the control channel 89'd * a fluidic amplifier 91 supplied with the duct 92 by 1<enclosure 73. This amplifi -

cator proportional to curved edges can be avantageu -

in Prance FBR described in Patent deposited/the No. 181,006. W..

27 december 1968/name of the company bertiïï and a CIE, the

output of this amplifier 93 91 is connected by the conduit 111 to a channel of a 108 controlled fluidic amplifier 94 substantially similar to the previous, which is supplied with the duct 95 by the enclosure 72. the output of the amplifier 96 94 97 is connected to the inlet of the pneumatic valve 3 through line 109.

This valve shown diagrammatically in Figure 1 consists of a valve 98, 99 by adjusting the port communication between the conduit and the conduit 2 of UTI crystallizing - 4. The valve 98 is extended by a shaft 101 provided with a guide means 102 and terminating in a plate or membrane 105 on which reacts a spring 104 normally works in compression * ν ε ·ηη℮ the assembly is housed in a housing 105 9.ï

A conduit provided with a throttle valve 106 107 97 the input connections of the valve 3 to the control channel of the first amplifier 89 *

the direct operation proportional is as follows:

the valve 107 is ferméei the lever 19 is in position as shown in full. An increase, for example the pressure in the conduit using 4, 6 is transmitted through the conduit system to défêrmation 7 whose movement rotates the lever 19 and then by the axis 16, the tray 21, the tray 21 in turn drives in rotation by the roller 25 the wheel 24 which, itself moves the cam 43 so as to decrease the obstruction of the flow deflector for an increase in pressure in the conduit 4. use of fluid collected in the use channel 83 increases and increases the deflection of the fluidic amplifier 91" fluid collected in the conduit using 93 of this amplifier decreases and the deflection of the jet of the second fluidic amplifier 94 decreases, fluid collected in the use channel 96 increases and repels, for this type of valve, the check valve 98 that obstructs the port more * 99. thereby adjusting the pressure in the conduit to the requested value of use,

the operation reverse proportional is as follows:

the valve 107 is closed, the lever 19 is in position as shown-in are mixed. the Béquenoes

Operating•SAW are similar to previous but the symmetrical position of the lever 19 with respect to the operation préoédent reverses the movement of the cam, causing an increase in the obstruction for an increase in pressure in the conduit of use. EO operation is applicable, for example, ; in the SAW a pneumatic valve whose opening is proportional to the pressure applied to the valve inlet.

The operation in "all or nothing" is as follows T the valve 107 is open.

In the operation "on-off", the signal

pressure from the sensor plus the negative feedback from the output of the last stage. This caused an increase in outlet pressure which settles at the maximum value that may give the apparatus. Conversely, when the pressure of the sensor drops sufficiently to cause a decrease in the output pressure,

, the against réaotion also decreases, so that the outlet pressure falls to its minimum value.

The replacement of the amplifier 91 by (amplifier) 91a provides the operation "on-off", the valve 107 being closed.

Figure 8 represents, in fonotion IQ generator pressure and demand pressure w ^, the curves representative of different operations directly proportional in accordance with two different sensitivities adjusted by a enfonoement roller 25, retaining the operating pressure being the pressure P, the curve W represents a proportional operation in reverse.

It will die itself that. the invention is not limited

to the embodiments explicitly déorits, but it runs also those obtainable by the use of means of technical equivalents: in particular, the pressure regulator may control, through a suitable pneumatic device, any physical quantity which variations can result in mechanical motion through a suitable sensor (pressure, flow rate (the sensor advantageously being differential pressure), temperature level *, speed and the like ^