FR2823263A1 - Improvements to double acting pneumatic actuators comprises non-return valve between compressed air supply source and actuator chamber enabling adjustment of reduction of chamber supply pressure relative to supply source - Google Patents
Improvements to double acting pneumatic actuators comprises non-return valve between compressed air supply source and actuator chamber enabling adjustment of reduction of chamber supply pressure relative to supply source Download PDFInfo
- Publication number
- FR2823263A1 FR2823263A1 FR0104893A FR0104893A FR2823263A1 FR 2823263 A1 FR2823263 A1 FR 2823263A1 FR 0104893 A FR0104893 A FR 0104893A FR 0104893 A FR0104893 A FR 0104893A FR 2823263 A1 FR2823263 A1 FR 2823263A1
- Authority
- FR
- France
- Prior art keywords
- chamber
- supply source
- return valve
- compressed air
- reduction
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
Abstract
Description
<Desc/Clms Page number 1> <Desc / Clms Page number 1>
La présente invention concerne des perfectionnements apportés aux vérins pneumatiques double effet. Elle se propose d'apporter un vérin se caractérisant par un effort et une vitesse importants à la descente du piston et une remontée rapide sous faible pression réduisant ainsi la consommation en air comprimé et permettant, à performances égales, de réaliser des vérins moins encombrants. The present invention relates to improvements made to double-acting pneumatic cylinders. It proposes to provide a jack characterized by a significant effort and speed at the descent of the piston and a rapid ascent under low pressure thus reducing the consumption of compressed air and allowing, at equal performance, to make cylinders less bulky.
En conséquence, cette invention a pour objet un vérin pneumatique double effet, caractérisé en ce qu'il comporte un moyen de réduction de la consommation en air comprimé constitué d'un clapet anti-retour, interposé entre la source d'alimentation en air comprimé et la chambre du vérin assurant le retour du piston du vérin, le tarage du ressort dudit clapet anti-retour permettant de régler la valeur de la réduction de la pression d'alimentation de ladite chambre par rapport à la pression d'alimentation. Consequently, the subject of this invention is a double-acting pneumatic cylinder, characterized in that it comprises a means of reducing the consumption of compressed air consisting of a non-return valve, interposed between the source of supply of compressed air. and the cylinder chamber ensuring the return of the piston of the cylinder, the calibration of the spring of said non-return valve making it possible to adjust the value of the reduction in the supply pressure of said chamber relative to the supply pressure.
Selon un mode de réalisation préféré, ledit clapet anti-retour est intégré dans le corps du distributeur immédiatement en amont de la vanne alimentant la chambre de retour du piston. According to a preferred embodiment, said non-return valve is integrated in the body of the distributor immediately upstream of the valve supplying the piston return chamber.
D'autres caractéristiques et avantages de cette invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent un exemple de réalisation préféré, dépourvu de tout caractère limitatif. Sur les dessins : la figure 1 est une vue en coupe axiale verticale partielle d'un vérin selon l'invention et - la figure 2 est une vue de détail représentant en coupe verticale le distributeur muni du clapet anti-retour. Other characteristics and advantages of this invention will emerge from the description given below with reference to the attached drawings which illustrate a preferred embodiment thereof, devoid of any limiting character. In the drawings: FIG. 1 is a view in partial vertical axial section of a jack according to the invention and - FIG. 2 is a detail view showing in vertical section the distributor provided with the non-return valve.
On se réfère en premier lieu à la figure 1 sur laquelle le vérin pneumatique double effet a été désigné dans son ensemble par la référence 10 et son piston par la référence 11. Les deux chambres 13' (chambre arrière) et 13 (chambre avant ou de retour) du cylindre dudit vérin sont alimentées en air comprimé à partir d'un système de conduite 12 et d'un distributeur désigné dans son ensemble par la référence 20. Ce distributeur intègre dans un corps monobloc, la vanne 15 d'alimentation de la chambre arrière Firstly, reference is made to FIG. 1 in which the double-acting pneumatic cylinder has been designated as a whole by the reference 10 and its piston by the reference 11. The two chambers 13 '(rear chamber) and 13 (front chamber or return) of the cylinder of said cylinder are supplied with compressed air from a duct system 12 and a distributor designated as a whole by the reference 20. This distributor integrates in a one-piece body, the valve 15 for supplying the back bedroom
<Desc/Clms Page number 2><Desc / Clms Page number 2>
13', par l'intermédiaire de la canalisation 14 et la vanne 16 alimentant la chambre avant 13. 13 ', via the line 14 and the valve 16 supplying the front chamber 13.
Afin d'obtenir un effort et une vitesse importants à la descente du piston 11 et une réduction de la consommation en air comprimé à la remontée du piston, l'invention prévoit un clapet anti-retour immédiatement en amont de l'alimentation en air comprimé de la chambre avant 13. In order to obtain a significant effort and speed when lowering the piston 11 and reducing the consumption of compressed air when raising the piston, the invention provides a non-return valve immediately upstream of the compressed air supply. from the front room 13.
Sur les figures, on a désigné par la référence 17 ce clapet anti-retour qui a été représenté en détail sur la figure 2. Sur cette figure, on voit que le clapet antiretour 17 est intégré dans le corps du distributeur 20. Il est réalisé de façon classique avec un clapet 18 à rappel par ressort 19. L'air comprimé délivré par la source d'alimentation (de 12) est admis au travers de la voie 24 et passe dans la vanne de distribution 16 après avoir subi une réduction de pression due à la présence du clapet antiretour. Le ressort 19 est taré de façon à obtenir la réduction de pression souhaitée. Ainsi, si la pression
d'alimentation (voie d'admission 24) est de 7. 105Pa et si le ressort du clapet anti-retour est taré à 3, 5. 105Pa,, la pression d'air comprimé admise dans la vanne de distribution 16 et donc dans la chambre 13 du vérin, est de 3,5. 10 Pa. In the figures, the non-return valve has been designated by the reference 17 which has been shown in detail in FIG. 2. In this figure, it can be seen that the non-return valve 17 is integrated in the body of the distributor 20. It is produced conventionally with a spring return valve 18 19. The compressed air delivered by the power source (of 12) is admitted through the channel 24 and passes into the distribution valve 16 after having undergone a reduction of pressure due to the presence of the non-return valve. The spring 19 is calibrated so as to obtain the desired pressure reduction. So if the pressure
supply (inlet channel 24) is 7. 105Pa and if the non-return valve spring is calibrated at 3.5.5 105Pa ,, the compressed air pressure admitted into the distribution valve 16 and therefore in chamber 13 of the actuator is 3.5. 10 Pa.
La vanne de distribution 16 est du type classique, vanne à clapet 23 à rappel par ressort. Sur la figure 2, on peut voir en 21 la voie d'alimentation de la chambre 13 et en 22 l'échappement de cette dernière. The distribution valve 16 is of the conventional type, a flap valve 23 with spring return. In Figure 2, we can see at 21 the supply path of the chamber 13 and at 22 the exhaust of the latter.
La réduction de pression apportée par la présence du clapet anti-retour permet d'obtenir une réduction de la consommation en air comprimé, à la remontée du piston, qui est de l'ordre de 25% en volume sur un cycle de fonctionnement. Outre la fonction économiseur qu'elle assure, l'invention permet également de réaliser des vérins importants pilotés par des distributeurs de petite dimension, ce qui permet de réduire l'encombrement total. The reduction in pressure provided by the presence of the non-return valve makes it possible to obtain a reduction in the consumption of compressed air, when the piston rises, which is of the order of 25% in volume over an operating cycle. In addition to the economiser function which it provides, the invention also makes it possible to produce large jacks controlled by distributors of small dimension, which makes it possible to reduce the total bulk.
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Il demeure bien entendu que l'invention n'est pas limitée à l'exemple de réalisation décrit et représenté ici, mais qu'elle en englobe toutes les variantes.It remains to be understood that the invention is not limited to the embodiment described and shown here, but that it encompasses all variants thereof.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0104893A FR2823263A1 (en) | 2001-04-10 | 2001-04-10 | Improvements to double acting pneumatic actuators comprises non-return valve between compressed air supply source and actuator chamber enabling adjustment of reduction of chamber supply pressure relative to supply source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0104893A FR2823263A1 (en) | 2001-04-10 | 2001-04-10 | Improvements to double acting pneumatic actuators comprises non-return valve between compressed air supply source and actuator chamber enabling adjustment of reduction of chamber supply pressure relative to supply source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2823263A1 true FR2823263A1 (en) | 2002-10-11 |
Family
ID=8862176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0104893A Pending FR2823263A1 (en) | 2001-04-10 | 2001-04-10 | Improvements to double acting pneumatic actuators comprises non-return valve between compressed air supply source and actuator chamber enabling adjustment of reduction of chamber supply pressure relative to supply source |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2823263A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3643684A (en) * | 1970-03-16 | 1972-02-22 | William L Moore | Pressure control devices for pneumatic circuits |
| US4450861A (en) * | 1980-04-23 | 1984-05-29 | Daniel Bouteille | Compressed gas saving device |
| FR2578918A1 (en) * | 1985-03-15 | 1986-09-19 | Hoerbiger Ventilwerke Ag | Control device for a pneumatic jack |
| WO1988003609A1 (en) * | 1986-11-10 | 1988-05-19 | Hydro-Pneumatic Ab | Pneumatic or hydraulic cylinder with built-in velocity control |
| US5275086A (en) * | 1992-08-27 | 1994-01-04 | Unlimited Solutions, Inc. | Fluid actuator with internal pressure relief valve |
-
2001
- 2001-04-10 FR FR0104893A patent/FR2823263A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3643684A (en) * | 1970-03-16 | 1972-02-22 | William L Moore | Pressure control devices for pneumatic circuits |
| US4450861A (en) * | 1980-04-23 | 1984-05-29 | Daniel Bouteille | Compressed gas saving device |
| FR2578918A1 (en) * | 1985-03-15 | 1986-09-19 | Hoerbiger Ventilwerke Ag | Control device for a pneumatic jack |
| WO1988003609A1 (en) * | 1986-11-10 | 1988-05-19 | Hydro-Pneumatic Ab | Pneumatic or hydraulic cylinder with built-in velocity control |
| US5275086A (en) * | 1992-08-27 | 1994-01-04 | Unlimited Solutions, Inc. | Fluid actuator with internal pressure relief valve |
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