FR2550308A1 - Device for controlling the opening and closure of a tap with high pressure and flow rate - Google Patents
Device for controlling the opening and closure of a tap with high pressure and flow rate Download PDFInfo
- Publication number
- FR2550308A1 FR2550308A1 FR8312658A FR8312658A FR2550308A1 FR 2550308 A1 FR2550308 A1 FR 2550308A1 FR 8312658 A FR8312658 A FR 8312658A FR 8312658 A FR8312658 A FR 8312658A FR 2550308 A1 FR2550308 A1 FR 2550308A1
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- FR
- France
- Prior art keywords
- piston
- pilot valve
- cylinder
- rod
- face
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
- F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
- F16K31/3835—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston the discharge being effected through the piston and being blockable by a mechanically-actuated member making contact with the piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
Description
L'invention concerne un dispositif pour la commande d'ouverture et de fermeture d'un robinet à pression et débit élevés. The invention relates to a device for controlling the opening and closing of a high pressure and flow valve.
Dans le cas de robinets(ou vannes) destinés à commander l'alimentation ou l'arrêt d-e grandsdébitsde fluide à pression élevée, par exemple d'eau, de vapeur ou de gaz, il existe un problème réel quant à la commande de l'ouverture et de la fermeture du robinet et également du maintien en position de fermeture étanche du robinet. Les problèmes naissent évidemment du fait des grandes pressions mises en jeu et des forts débits nécessitant des sections de passage importantes, ce qui fait que les forces agissant sur les organes mobiles de fermeture du robinet deviennent très importantes. In the case of taps (or valves) intended to control the supply or the shutdown of large flows of fluid at high pressure, for example of water, steam or gas, there is a real problem as for the control of the opening and closing of the tap and also keeping the tap in the sealed closing position. The problems obviously arise due to the large pressures involved and the high flow rates requiring large passage sections, which means that the forces acting on the movable members for closing the valve become very large.
L'invention a pour objet de résoudre ce problème spécifique. The invention aims to solve this specific problem.
Dans le domaine des raccords rapides entre deux conduits, on connait des systèmes dans lesquels la connexion et la déconnexion de deux conduits peuvent être réaliséesavec des efforts raisonnables même en cas de pression et de débit importants en prévoyant sur le système une ouverture en deux temps par un clapet pilote de faible section qui permet de réaliser dans un premier temps avant connexion des deux conduits un certain équilibrage des pressions qui réduira la force nécessaire à réaliser la connexion. L'invention s'inspire un peu de ce principe mais elle est adaptée à la commande d'un robinet prévu à demeure sur une canalisation sans qu'il soit question ici de connexion ou de déconnexion entre deux conduits. In the field of quick couplings between two conduits, systems are known in which the connection and disconnection of two conduits can be carried out with reasonable efforts even in the event of high pressure and flow by providing the system with an opening in two stages by a pilot valve of small section which makes it possible to carry out initially before connection of the two conduits a certain balancing of the pressures which will reduce the force necessary to carry out the connection. The invention is inspired a little by this principle but it is suitable for controlling a tap permanently provided on a pipe without there being any question here of connection or disconnection between two conduits.
Le dispositif conforme à l'invention se caractérise en-cequ'il comprend un piston formant obturateur principal coulissant librement avec un certain débit de fuite dans un cylindre formant partie d'une chambre dans laquelle débouche une entrée du fluide sous pression, ledit piston dans sa position de fermeture étant plaqué par sa face "avant" contre un siège entourant l'orifice de sortie du fluide, ledit siège étant formé en regard dudit cylindre, ledit piston comportant un alésage qui le traverse de sa face "avant" à sa face "arrière", ledit alésage étant susceptible d'être obturé sur la face "arrière" du piston par un clapet pilote actionnable mécaniquement et positivement parallèlement à l'axe dudit piston et dudit cylindre. The device according to the invention is characterized in that it comprises a piston forming a main shutter sliding freely with a certain flow rate in a cylinder forming part of a chamber into which an inlet for the fluid under pressure opens, said piston in its closed position being pressed by its "front" face against a seat surrounding the fluid outlet orifice, said seat being formed opposite said cylinder, said piston having a bore which passes through it from its "front" face to its face "rear", said bore being capable of being closed on the "rear" face of the piston by a pilot valve actuable mechanically and positively parallel to the axis of said piston and said cylinder.
Grâce à cette disposition générale, l'ouverture du robinetpeutêtreobtenue sans effort important par simple commande positive en rétraction du clapet pilote, l'ourerture à plein débit du robinet s'effectuant automatiquement sous l'effet du débit de fluide sous pression qui s'instaure. Thanks to this general arrangement, the opening of the tap can be obtained without significant effort by simple positive control in retraction of the pilot valve, the opening at full flow of the tap taking place automatically under the effect of the flow of pressurized fluid which is established. .
De même, lors de la fermeture celle-ci s'effectue sans difficulté et l'on peut par des moyens simples, comme il apparaitra plus clairement à l'aide de la description qui suivra obtenir un bon maintien en "autofermeture" du robinet. Similarly, when closing it is carried out without difficulty and can be done by simple means, as will appear more clearly with the aid of the description which follows to obtain good maintenance in "self-closing" of the tap.
L'invention apparaîtra plus clairement à l'aide de la description qui va suivre faite en référence aux dessins annexés illustrant à titre d'exemple un mode de réalisation de l'invention. The invention will appear more clearly with the aid of the description which follows, given with reference to the accompanying drawings illustrating by way of example an embodiment of the invention.
Dans ces dessins
la figure 1 montre avec arrachement partiel une vue générale des éléments principaux entrant dans la construction d'un robinet conforme à l'invention;
la figure 2 est une vue faite avec arrachement partiel du même dispositif vu dans le sens de la flèche II de la figure 1;
la figure 3 est une vue en coupe faite selon le plan
III-III de la figure 1; cette vue montre en demi-coupe haute le robinet dans sa position de fermeture et en demi-coupe basse le robinet dans sa position d'ouverture;
la figure 4 est une vue agrandie de la partie repérée
IV à la figure 1;
la figure 5 est une vue agrandie de la partie repérée
V de la figure 3
Selon le mode de réalisation illustré aux dessins, le dispositif formant robinet comprend essentiellement un piston 1 qui coulisse librement avec un certain jeu repéré e aux figures 4 et 5 dans un cylindre 2 qui forme une partie d'une chambre 3 dans laquelle débouche une-entrée du fluide souspression. L'entrée de fluide est suggérée par la flèche 4 et la sortie par la flèche 5. Le piston 1 comporte sur sa face "avant" repérée AV au dessin une garniture d'étanchéité6 susceptible de venir porter contre un siège 7 entourant l'orifice de sortie 8 du fluide.Le siège 7 et l'orifice 8 sont formés en regard du cylindre 2 et sont centrés sur son axe 9. Le piston 1 comporte d'autre part un alésage 10 qui le traverse, de préférence sensiblement selon son axe de la face avant AV du piston à la face arrière AR. L'alésage 10 se termine sur la face arrière du piston 1 en étant entouré par une garniture d'étanchéité 11 formant siège pour la tête 12 d'un clapet pilote 13 qui permettra les commandes d'ouverture et de fermeture du robinet. Le clapet 13 est formé à sa partie arrière avec un petit piston 14 qui coulisse à l'intérieur d'un petit cylindre 15 ménagé vers l'arrière d'unetige de commande 16 du mécanisme.In these drawings
Figure 1 shows with partial cutaway a general view of the main elements involved in the construction of a valve according to the invention;
Figure 2 is a view made with partial cutaway of the same device seen in the direction of arrow II of Figure 1;
Figure 3 is a sectional view taken along the plan
III-III of Figure 1; this view shows in high half-section the valve in its closed position and in low half-section the valve in its open position;
Figure 4 is an enlarged view of the marked part
IV in Figure 1;
Figure 5 is an enlarged view of the marked part
V of figure 3
According to the embodiment illustrated in the drawings, the device forming a valve essentially comprises a piston 1 which slides freely with a certain clearance identified in FIGS. 4 and 5 in a cylinder 2 which forms part of a chamber 3 into which opens a inlet of pressurized fluid. The fluid inlet is suggested by arrow 4 and the outlet by arrow 5. The piston 1 has on its "front" face marked AV in the drawing a seal 6 capable of coming to bear against a seat 7 surrounding the orifice outlet 8 of the fluid. The seat 7 and the orifice 8 are formed facing the cylinder 2 and are centered on its axis 9. The piston 1 also has a bore 10 which passes through it, preferably substantially along its axis. from the front face AV of the piston to the rear face AR. The bore 10 ends on the rear face of the piston 1 while being surrounded by a seal 11 forming a seat for the head 12 of a pilot valve 13 which will allow the opening and closing controls of the valve. The valve 13 is formed at its rear part with a small piston 14 which slides inside a small cylinder 15 formed towards the rear of a control rod 16 of the mechanism.
Comme il apparait plus clairement des figures 1 à 3, la tige 16 de commande comporte une partie dentée formant crémaillère 17 sur laquelle roule un pignon 18 commandé en rotation par un levier 19 dont une extrémité conformée en secteur denté 20 engraine avec une partie correspondante 18' du pignon 18. As it appears more clearly from FIGS. 1 to 3, the control rod 16 comprises a toothed part forming a rack 17 on which rolls a pinion 18 controlled in rotation by a lever 19, one end of which is shaped into a toothed sector 20 engages with a corresponding part 18 'of the pinion 18.
D'autre part, on aperçoit clairement à la figure 4 un petit ressort 21 monté dans le cylindre 15 derrière le piston 14 du clapet pilote 13 et tendant à repousser celui-ci vers l'avant comme indiqué par la flèche 22. On the other hand, we can clearly see in FIG. 4 a small spring 21 mounted in the cylinder 15 behind the piston 14 of the pilot valve 13 and tending to push the latter forward as indicated by the arrow 22.
Le fonctionnement du dispositif va être maintenant décrit. The operation of the device will now be described.
En supposant le robinet fermé, c'est-à-dire dans la position illustrée plus clairement à la figure 4, on commande l'ouverture de la facon suivante. Assuming the valve closed, that is to say in the position illustrated more clearly in FIG. 4, the opening is controlled in the following manner.
Au moyen du levier 19, on commande la rotation du pignon 18 et le recul dans le sens de la flèche 23 (figure 4) de la crémaillère 16. Après un petit moment nécessaire à rattraper le jeu d entre le petit piston 14 et le flasque de fermeture avant du cylindre 15, on tire positivement en arrière le clapet pilote 12. La pression du fluide régnant dans la chambre 3 existe également dans le volume 24 entre la face arrière du piston 1 et le fond en forme de cloche du cylindre 2 du fait du jeu e laissé entre le piston 1::et le cylindre 2. Cependant comme la surface du clapet pilote 12 est réduite, la forces'opposant au décollage de la tête 12 du siège 11 n'est pas importante, et cette action est réalisée aisément. By means of the lever 19, the rotation of the pinion 18 and the recoil in the direction of the arrow 23 (FIG. 4) of the rack 16 are controlled. After a small moment necessary to make up for the play d between the small piston 14 and the flange closing the cylinder 15, the pilot valve 12 is positively pulled back. The pressure of the fluid prevailing in the chamber 3 also exists in the volume 24 between the rear face of the piston 1 and the bell-shaped bottom of the cylinder 2 of the made of the clearance e left between the piston 1 :: and the cylinder 2. However as the surface of the pilot valve 12 is reduced, the forces opposing the takeoff of the head 12 from the seat 11 are not significant, and this action is easily performed.
A partir de ce moment la pression dans le volume 24 chute brusquement, l'alésage 10 étant ouvert et communiquant avec l'orifice de sortie 25 sous faible pression. A partir de ce moment la pression régnant dans la chambre 3 repousse automatiquement le piston 1 dans le sens de la flèche 23 (le volume de la chambre 3 tendant à croître autant que possible). La liaison est ainsi établie comme il apparaît à la figure 5 sur la demi-coupe inférieure. From this moment the pressure in the volume 24 drops suddenly, the bore 10 being open and communicating with the outlet orifice 25 under low pressure. From this moment the pressure in the chamber 3 automatically pushes the piston 1 in the direction of the arrow 23 (the volume of the chamber 3 tends to increase as much as possible). The connection is thus established as it appears in FIG. 5 on the lower half-section.
Pour la fermeture on viendra repousser par la tige 16 et le clapet pilote 13 le piston 1, le ressort 21 étant comprimé lors de cette phase. La fermeture positive se fait sans grand effort du fait que au-fur-et-d-mesure qu'elle s'effectue, la pression tend à croître dans le volume 24 derrière le piston 1 de façon à équilibrer les forces en présence. En fin de fermeture, on retrouve la position de la figure 4 dans laquelle la pression du fluide s'exercant dans la chambre 3 tend à maintenir le piston 1 collé par sa face avant sur son siège 7, pourvu que l'on ait prit soin de choisir la surface d'ouverture du siège 7 légèrement inférieure à la surface arrière du piston 1 comme il apparaît au dessin. Le ressort 21 du clapet pilote maintient celui-ci en permanence plaqué contre son siège 11 et assure le rattrapage des jeux pouvant naître lors du vieillissement du système. For closing, the rod 16 and the pilot valve 13 will push back the piston 1, the spring 21 being compressed during this phase. Positive closing is done without great effort because, as and as it takes place, the pressure tends to increase in the volume 24 behind the piston 1 so as to balance the forces involved. At the end of closing, we find the position of Figure 4 in which the pressure of the fluid exerted in the chamber 3 tends to keep the piston 1 stuck by its front face on its seat 7, provided that care has been taken to choose the seat opening surface 7 slightly smaller than the rear surface of the piston 1 as it appears in the drawing. The spring 21 of the pilot valve keeps the latter permanently pressed against its seat 11 and ensures the adjustment of the clearances which may arise during the aging of the system.
On note que pour l'étanchéité et le guidage de la tige 16 on a prévu un manchon 26 entre la partie avant de la tige 16 formant piston et la paroi 27 en forme de manchon prolongeant vers l'arrière le cylindre 2 en forme de cloche. It will be noted that for sealing and guiding the rod 16, a sleeve 26 is provided between the front part of the rod 16 forming the piston and the wall 27 in the form of a sleeve extending the cylinder 2 in the form of a bell .
Diverses variantes peuvent être apportées au mode de réalisation décrit. Ainsi on peut prévoir une liaison mécanique entrele clapet pilote 13 et le piston 1 formant obturateur principal de façon qu'après dégagement à l'ouver- ture du clapet pilote de quelques millimètres en arrière du piston 1, on ait une traction mécanique du clapet sur le pis ton ai ce dernier ne s'est pas dégagé automatiquement et hydrauliquement de son siège 7. Cette liaison peut être assurée par exemple par un ergot prévu sur le piston 1 et qui s'engage derrière la tête 12 du clapet-pilote 13. Various variants can be made to the embodiment described. Thus, a mechanical connection can be provided between the pilot valve 13 and the piston 1 forming the main shutter so that, after release of the pilot valve a few millimeters behind the piston 1, there is mechanical traction of the valve on the worse your ai did not automatically and hydraulically disengage from its seat 7. This connection can be ensured for example by a lug provided on the piston 1 and which engages behind the head 12 of the pilot valve 13.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8312658A FR2550308A1 (en) | 1983-08-01 | 1983-08-01 | Device for controlling the opening and closure of a tap with high pressure and flow rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8312658A FR2550308A1 (en) | 1983-08-01 | 1983-08-01 | Device for controlling the opening and closure of a tap with high pressure and flow rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2550308A1 true FR2550308A1 (en) | 1985-02-08 |
Family
ID=9291295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8312658A Pending FR2550308A1 (en) | 1983-08-01 | 1983-08-01 | Device for controlling the opening and closure of a tap with high pressure and flow rate |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2550308A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124741A3 (en) * | 2006-05-02 | 2008-03-06 | Bredow Christian-Alexander V | Pressure accumulator, valve, and distribution unit as a portable or permanently mounted device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805038A (en) * | 1951-12-07 | 1957-09-03 | Electraulic Presses Ltd | Pressure actuated bye-pass valves |
| FR1180144A (en) * | 1956-08-06 | 1959-06-02 | Hays Mfg Co | Advanced valve |
| DE1259160B (en) * | 1962-09-14 | 1968-01-18 | Werner Imobersteg Dipl Ing | Flow valve for high pressures |
| DE2424321A1 (en) * | 1974-05-18 | 1975-11-20 | Woma Maasberg Co Gmbh W | SHUT-OFF VALVE FOR HIGH AND HIGHEST PRESSURES, IN PARTICULAR FOR HIGH PRESSURE GUNS |
-
1983
- 1983-08-01 FR FR8312658A patent/FR2550308A1/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805038A (en) * | 1951-12-07 | 1957-09-03 | Electraulic Presses Ltd | Pressure actuated bye-pass valves |
| FR1180144A (en) * | 1956-08-06 | 1959-06-02 | Hays Mfg Co | Advanced valve |
| DE1259160B (en) * | 1962-09-14 | 1968-01-18 | Werner Imobersteg Dipl Ing | Flow valve for high pressures |
| DE2424321A1 (en) * | 1974-05-18 | 1975-11-20 | Woma Maasberg Co Gmbh W | SHUT-OFF VALVE FOR HIGH AND HIGHEST PRESSURES, IN PARTICULAR FOR HIGH PRESSURE GUNS |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124741A3 (en) * | 2006-05-02 | 2008-03-06 | Bredow Christian-Alexander V | Pressure accumulator, valve, and distribution unit as a portable or permanently mounted device |
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