FR2756946A1 - Differential pressure regulator - Google Patents
Differential pressure regulator Download PDFInfo
- Publication number
- FR2756946A1 FR2756946A1 FR9615112A FR9615112A FR2756946A1 FR 2756946 A1 FR2756946 A1 FR 2756946A1 FR 9615112 A FR9615112 A FR 9615112A FR 9615112 A FR9615112 A FR 9615112A FR 2756946 A1 FR2756946 A1 FR 2756946A1
- Authority
- FR
- France
- Prior art keywords
- pressure
- flexible membrane
- piston
- membrane
- reference pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
- G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
- G05D16/0658—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane characterised by the form of the obturator
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
Description
La présente invention concerne un dispositif permettant la régulation précise de pressions et très hautes pressions hydrauliques. The present invention relates to a device allowing precise regulation of hydraulic pressures and very high pressures.
Il est techniquement difficile de réguler une pression hydraulique de façon précise d'autant plus lorsqu'un débit variable entre en jeu. Il est aussi laborieux d'effectuer un prélèvement de fluide dans un circuit sous pression en évitant toute chute de cette pression. It is technically difficult to regulate a hydraulic pressure precisely all the more when a variable flow comes into play. It is also laborious to take a fluid sample in a pressurized circuit avoiding any drop in this pressure.
L'utilisation de clapet taré est possible mais s avère souvent très imprécise. Dans la majorité des cas, la force de contreréaction est appliquée sur une membrane ou un piston par un ressort taré en compression ce qui engendre frottements et une mauvaise répartition de la force appliquée. The use of a calibrated valve is possible but often turns out to be very imprecise. In the majority of cases, the counter-reaction force is applied to a membrane or a piston by a calibrated spring in compression, which generates friction and poor distribution of the force applied.
La présente invention, permet de réguler une pression constante dans un circuit hydraulique. Elle permet aussi le prélèvement du fluide dans ce meme circuit alimenté en débit sans en varier significativement la pression. The present invention makes it possible to regulate a constant pressure in a hydraulic circuit. It also allows the withdrawal of the fluid in this same circuit supplied with flow without significantly varying the pressure.
Ce matériel comporte une membrane souple soumise à une pression de référence sur une de ses faces. Cette pression correspond à la pression de consigne qui peut provenir d'une référence externe, d'un réservoir accolé, ou d'un réservoir accolé ajustable. Sur l'autre face de la membrane souple (face soumise à la pression du circuit à réguler), se trouve un piston solidaire de la membrane chargé d'effectuer l'obturation de l'orifice de sortie. C'est de ce côté que l'on applique la pression du circuit, c'est à dire la pression à réguler. This material comprises a flexible membrane subjected to a reference pressure on one of its faces. This pressure corresponds to the set pressure which can come from an external reference, from an attached tank, or from an adjustable attached tank. On the other face of the flexible membrane (face subjected to the pressure of the circuit to be regulated), there is a piston integral with the membrane responsible for sealing the outlet orifice. It is on this side that the circuit pressure is applied, ie the pressure to be regulated.
Lorsque la pression du circuit à l'entrée du régulateur est inférieure ou égale à la pression de référence, le piston de la membrane souple reste appuyé contre la face du corps inférieur du régulateur où il obture l'orifice de sortie. When the pressure of the circuit at the inlet of the regulator is less than or equal to the reference pressure, the piston of the flexible membrane remains pressed against the face of the lower body of the regulator where it closes the outlet orifice.
Lorsque la pression du circuit à l'entrée du régulateur est plus importante que la pression de référence, la membrane souple se trouve déformée dans le sens opposé libérant ainsi l'orifice de sortie. La surpression du circuit présente à l'entrée et dans la partie inférieur du régulateur ressort par l'orifice de sortie. When the pressure of the circuit at the inlet of the regulator is higher than the reference pressure, the flexible membrane is deformed in the opposite direction thus freeing the outlet orifice. The circuit overpressure present at the inlet and in the lower part of the regulator comes out through the outlet orifice.
Le régulateur de pression différentiel est illustré en annexe
La figure 1 présente le régulateur de pression différentiel en position
fermée.The differential pressure regulator is illustrated in the appendix.
Figure 1 shows the differential pressure regulator in position
closed.
La figure 2 présente ce méme système en position ouverte. FIG. 2 shows this same system in the open position.
En référence à ces dessins, le régulateur se compose principalement de deux corps inférieurs (2) et supérieures (4) et d'une membrane souple (9) solidaire d'un piston (3) sollicitée d'un côté par une pression de référence, de l'autre, par la pression que l'on veut réguler. Dans le cas où la pression d'entrée du dispositif est inférieure ou égale à la pression de référence, la membrane souple (9) se déforme et l'extrémité du piston (3), équipée d'un joint (8), vient en contact avec la portée de joint du corps inférieur (1) obturant ainsi l'orifice de sortie du dispositif (13) (figure 1). Dans le cas où la pression d'entrée du dispositif est supérieure à la pression de référence, la membrane souple (9) se déforme dans l'autre sens et l'extrémité du piston (3), équipée du joint (8) libère l'orifice de sortie du dispositif
(13) et laisse passer le fluide (figure 2).With reference to these drawings, the regulator mainly consists of two lower (2) and upper (4) bodies and a flexible membrane (9) secured to a piston (3) biased on one side by a reference pressure. , on the other, by the pressure that we want to regulate. In the case where the inlet pressure of the device is less than or equal to the reference pressure, the flexible membrane (9) deforms and the end of the piston (3), fitted with a seal (8), comes in contact with the seal surface of the lower body (1) thus closing the outlet orifice of the device (13) (Figure 1). If the inlet pressure of the device is higher than the reference pressure, the flexible membrane (9) deforms in the other direction and the end of the piston (3), fitted with the seal (8) releases the device outlet
(13) and lets the fluid through (Figure 2).
L'étanchéité des deux volumes de part et d'autre de la membrane souple (9) est assurée par deux joints (11) et (10) logés dans chacun des corps inférieur (2) et supérieur (4) et en contact avec chaque face de la membrane souple (9). The sealing of the two volumes on either side of the flexible membrane (9) is ensured by two seals (11) and (10) housed in each of the lower (2) and upper (4) bodies and in contact with each face of the flexible membrane (9).
Un ressort (7) logé dans le corps supérieur (4) et en contact avec la membrane souple (9) exerce sur celle-ci une légère pression qui la maintient en position fermée à l'état repos ou en équipression (figure 1). A spring (7) housed in the upper body (4) and in contact with the flexible membrane (9) exerts on it a slight pressure which keeps it in the closed position in the rest state or under pressure (Figure 1).
A l'extérieur du corps inférieur (2), deux trous (1) et (14) permettent le raccordement ; l'un (1) étant l'entrée du dispositif où l'on amène la pression à réguler, l'autre (14) étant la sortie du fluide. Outside the lower body (2), two holes (1) and (14) allow the connection; one (1) being the inlet of the device where the pressure to be regulated is brought, the other (14) being the outlet of the fluid.
Chacune des faces intérieures (12) et (5) des corps inférieurs (2) et supérieurs (4), sont de forme conique permettant à la membrane (9) de faire son office sans se détériorer dans les deux positions extrêmes et de fait permet de travailler avec pression atmosphérique sur une face et 400 ou 500 bar sur l'autre face. Each of the inner faces (12) and (5) of the lower (2) and upper (4) bodies are conical in shape allowing the membrane (9) to do its job without deteriorating in the two extreme positions and in fact allows to work with atmospheric pressure on one side and 400 or 500 bar on the other side.
Selon des variantes non illustrées, tous les rapports dimensionnels entre le diamètre du joint d'obturation (8) et la surface de la membrane peuvent être envisagés. La précision du système est directement liée à ce rapport. According to variants not illustrated, all the dimensional relationships between the diameter of the sealing joint (8) and the surface of the membrane can be envisaged. The accuracy of the system is directly linked to this report.
Selon des variantes non illustrées, le corps supérieur (4) peut avoir une forme extérieure différente. C'est à dire que la pression d'entrée peut etre amenée soit par un raccordement standard débouchant sur le perçage (6), soit le corps supérieur (4) fait fonction de réservoir d'air réglable ou non ceci afin de rendre le dispositif autonome. According to variants not illustrated, the upper body (4) may have a different external shape. That is to say that the inlet pressure can be brought either by a standard connection leading to the bore (6), or the upper body (4) acts as an adjustable air reservoir or not this in order to make the device autonomous.
Selon des variantes non illustrées, tous les types de raccordements hydrauliques sont envisageables selon les applications. According to variants not shown, all types of hydraulic connections can be envisaged depending on the applications.
Ce dispositif selon l'invention est destiné à la régulation précise de toute pression fluidique. This device according to the invention is intended for the precise regulation of any fluid pressure.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9615112A FR2756946B1 (en) | 1996-12-09 | 1996-12-09 | DIFFERENTIAL PRESSURE REGULATOR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9615112A FR2756946B1 (en) | 1996-12-09 | 1996-12-09 | DIFFERENTIAL PRESSURE REGULATOR |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2756946A1 true FR2756946A1 (en) | 1998-06-12 |
FR2756946B1 FR2756946B1 (en) | 2004-06-11 |
Family
ID=9498482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9615112A Expired - Fee Related FR2756946B1 (en) | 1996-12-09 | 1996-12-09 | DIFFERENTIAL PRESSURE REGULATOR |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2756946B1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3545722A (en) * | 1968-11-18 | 1970-12-08 | Sylvania Electric Prod | Vacuum valve with spring biased plastic diaphragm |
CA1138741A (en) * | 1981-01-12 | 1983-01-04 | Petroleum Recovery Institute | Back pressure regulator |
US4828219A (en) * | 1986-10-31 | 1989-05-09 | Motoyama Eng. Works, Lts | Metal diaphragm valve |
US4846215A (en) * | 1988-06-07 | 1989-07-11 | Marathon Oil Company | Back pressure regulator |
EP0347555A1 (en) * | 1988-05-20 | 1989-12-27 | ALFRED TEVES GmbH | Single-acting working cylinder for a brake power adjuster |
GB2219952A (en) * | 1988-06-28 | 1989-12-28 | Samson Ag | Adjustment of rotary radial cutting head |
-
1996
- 1996-12-09 FR FR9615112A patent/FR2756946B1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3545722A (en) * | 1968-11-18 | 1970-12-08 | Sylvania Electric Prod | Vacuum valve with spring biased plastic diaphragm |
CA1138741A (en) * | 1981-01-12 | 1983-01-04 | Petroleum Recovery Institute | Back pressure regulator |
US4828219A (en) * | 1986-10-31 | 1989-05-09 | Motoyama Eng. Works, Lts | Metal diaphragm valve |
EP0347555A1 (en) * | 1988-05-20 | 1989-12-27 | ALFRED TEVES GmbH | Single-acting working cylinder for a brake power adjuster |
US4846215A (en) * | 1988-06-07 | 1989-07-11 | Marathon Oil Company | Back pressure regulator |
GB2219952A (en) * | 1988-06-28 | 1989-12-28 | Samson Ag | Adjustment of rotary radial cutting head |
Also Published As
Publication number | Publication date |
---|---|
FR2756946B1 (en) | 2004-06-11 |
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TP | Transmission of property | ||
ST | Notification of lapse |
Effective date: 20130830 |