FR2630806A1 - Improvement to valves of differential type - Google Patents

Improvement to valves of differential type Download PDF

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Publication number
FR2630806A1
FR2630806A1 FR8805594A FR8805594A FR2630806A1 FR 2630806 A1 FR2630806 A1 FR 2630806A1 FR 8805594 A FR8805594 A FR 8805594A FR 8805594 A FR8805594 A FR 8805594A FR 2630806 A1 FR2630806 A1 FR 2630806A1
Authority
FR
France
Prior art keywords
valve
pressure
opening
piston
fluid
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
Application number
FR8805594A
Other languages
French (fr)
Other versions
FR2630806B3 (en
Inventor
Maurice Deborde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RECH APPLIQUEE STE CIVILE
Original Assignee
RECH APPLIQUEE STE CIVILE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RECH APPLIQUEE STE CIVILE filed Critical RECH APPLIQUEE STE CIVILE
Priority to FR8805594A priority Critical patent/FR2630806B3/en
Priority to ES89401199T priority patent/ES2047138T3/en
Priority to EP19890401199 priority patent/EP0340111B1/en
Priority to DE1989611579 priority patent/DE68911579T2/en
Publication of FR2630806A1 publication Critical patent/FR2630806A1/en
Application granted granted Critical
Publication of FR2630806B3 publication Critical patent/FR2630806B3/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
    • A62C37/46—Construction of the actuator

Abstract

The invention relates to a differential valve in which the method of operation gives a valve effect which alternately allows the drainage or charging mode for a pressurized fluid circuit. It consists of a body 1 in which there slides a piston 7 secured to a valve element 9 held closed by the pressure of the fluid and capable of opening in valve mode under the effect of a downstream pressure.

Description

L'invention concerne les vannes de type différentiel à fluides et notamment celles utilisées pour la vidange de réservoirs sous pression. The invention relates to differential type valves with fluids and in particular those used for emptying pressure tanks.

Les dites vannes présentent l'avantage de pouvoir être actionnées à distance au moyen de dispositifs de commande.Said valves have the advantage of being able to be actuated remotely by means of control devices.

Ces vannes sont essentiellement constituées d'un corps, muni des deux orifices d'entrée et de sortie du fluide, l'ouverture d'entrée axiale forme siège sur lequel s'applique un clapet solidaire d'un piston de section supérieure susceptible de coulisser dans le corps de vanne.These valves essentially consist of a body, provided with two inlet and outlet openings for the fluid, the axial inlet opening forms a seat on which a valve secured to a piston of upper section capable of sliding can be applied. in the valve body.

Une chambre fermée est ainsi constituée par la face supérieure du piston et la paroi interne du corpus. Un canal de faible section est pratiqué au travers de l'ensemble clapet/piston, afin d'établir-la pression du fluide dans la chambre. sur la section droite du piston, laquelle est supérieure à celle du clapet qui est en conséquence appliquée sur le siège et assure la fermeture;
La mise à l'atmosphère de la chambre, par un ajutage de décompression de section supérieure au canal de mise sous pression, provoque ltouverture immédiate du clapet, sous l'effet de la décompression, et l'écoulement du fluide par l'orifice de sortie.A closed chamber is thus formed by the upper face of the piston and the internal wall of the corpus. A channel of small section is formed through the valve / piston assembly, in order to establish the pressure of the fluid in the chamber. on the straight section of the piston, which is greater than that of the valve which is consequently applied to the seat and ensures the closure;
The venting of the chamber, by a decompression nozzle of section greater than the pressurization channel, causes the immediate opening of the valve, under the effect of the decompression, and the flow of the fluid through the orifice exit.

Dans ce type de vanne, le remplissage et la mise sous pression des réservoirs sont effectués par une vanne ou un clapet particulier. In this type of valve, the filling and pressurization of the tanks are carried out by a special valve or valve.

La vanne selon l'invention permet d'effectuer alternativement les fonctions de vidange et de recharge. The valve according to the invention makes it possible to carry out alternately the emptying and recharging functions.

Pour-cela, les orifices d'entrée et de sortie sont inversés, cette disposition ne modifie pas le principe de fonctionnement différentiel ainsi que le montre la description de l'invention, mais confère au clapet de fermeture un rôle de soupape mis à profit pour inverser le sens de l'écoulement du fluide lors du chargement. For this, the inlet and outlet openings are reversed, this arrangement does not modify the principle of differential operation as shown in the description of the invention, but gives the closing valve a role of valve used to reverse the direction of fluid flow during loading.

La figure 1 représente en coupe la vanne selon l'invention en fonction- fermée et son dispositif de blocage. Figure 1 shows in section the valve according to the invention in closed function and its blocking device.

La figure 2 représente la vanne ouverte ainsi que le raccord de remplissage. Figure 2 shows the valve open and the filling connection.

La vanne représentée par les figures 1 et 2, comporte essentiellement un corps (1), les orifices d'entrée (2ï et de sortie du fluide (3), munis des raccords filetés (5) et (6), raccordés d'une part au réservoir (4), d'autre part au conduit de vidange et de chargement. Le piston muni de son joint d'étanchéité (8) est solidaire du Clapet (9) et du guide de coulissement (10). The valve represented by FIGS. 1 and 2 essentially comprises a body (1), the inlet orifices (2ï and outlet of the fluid (3), provided with threaded connections (5) and (6), connected with a part to the tank (4), on the other hand to the drain and loading conduit The piston provided with its seal (8) is integral with the valve (9) and the sliding guide (10).

Un canal (11) de mise en pression de la chambre (12) est pratiqué dans le piston qui s'applique sur le joint de butée (13), en position d'ouverture. Un bouchon de fermeture (14) obture l'ajutage de décompression (15) susceptible d'être mis à l'atmosphère au travers du conduit (16), au moyen d'un dispositif adéquat. A channel (11) for pressurizing the chamber (12) is formed in the piston which is applied to the stop gasket (13), in the open position. A closure plug (14) closes the decompression nozzle (15) capable of being vented through the conduit (16), by means of a suitable device.

Sur la figure 2, est représenté le raccord de chargement et d'alimen talion en fluide sous pression, à partir d'un réservoir. In Figure 2, there is shown the connection for loading and supplying pressurized fluid from a reservoir.

Le fonctionnement du dispositif est le suivant
En position fermée représentée par la figure 1, la pression du fluide contenu dans le réservoir, s'établit dans la chambre (12) à travers l'ajutage (15), et s'exerce sur la surface du piston de plus grande section, maintenant ainsi le clapet (9) appliqué sur son siège, lequel assure la fermeture.The operation of the device is as follows
In the closed position represented by FIG. 1, the pressure of the fluid contained in the reservoir, is established in the chamber (12) through the nozzle (15), and is exerted on the surface of the piston of larger section, thus maintaining the valve (9) applied to its seat, which ensures the closure.

Dès la décompression de la chambre, par ouverture du conduit (16), la pression exercée sur la surface de faible section du piston provoque son coulissement et l'ouverture du clapet de décharge (9). As soon as the chamber is decompressed, by opening the duct (16), the pressure exerted on the surface of small section of the piston causes it to slide and the relief valve (9) to open.

L'écoulement du fluide sous pression se produit ainsi par le raccord (6), jusqu'à vidange du fluide contenu dans le réservoir. The flow of pressurized fluid thus occurs through the fitting (6), until the fluid contained in the reservoir is drained.

La charge du réservoir s'effectue par l'orifice (3), au moyen du raccord fileté (20) et du joint (19), le tube (18) est raccordé au système de charge, lequel exerce une pression, le clapet est alors refoulé par la pression et ouvre le passage au fluide. The tank is charged via the orifice (3), by means of the threaded connection (20) and the seal (19), the tube (18) is connected to the charging system, which exerts pressure, the valve is then driven back by the pressure and opens the passage to the fluid.

La fermeture de la vanne s effectue automatiquement dès l'arrêt de la pression, et de la mise à l'atmosphère du raccord de sortie, de préférence au moyen d'une vanne de décompression (21) disposée sur le système de charge.  The valve is closed automatically as soon as the pressure stops and the outlet fitting is vented, preferably by means of a pressure relief valve (21) arranged on the charging system.

Par ailleurs, les caractéristiques de cette forme de vanne présentent un certain nombre d'avantages
La vanne est raccordée au réservoir au moyen du raccord (5) vissé respectivement dans le corps (1) et l'embase filetée du réservoir, celui-ci est donc interchangeable, et permet son adaptation à tous les types de filetage utilisés sur les réservoirs, ce qui réduit le stock à un seul modèle.Furthermore, the characteristics of this form of valve have a number of advantages.
The valve is connected to the reservoir by means of the connector (5) screwed respectively into the body (1) and the threaded base of the reservoir, the latter is therefore interchangeable, and allows its adaptation to all types of thread used on the reservoirs , which reduces the stock to a single model.

Le corps de vanne est fermé par le bouchon fileté (17), sa dépose permet de retirer le piston et de vérifier l'état interne du corps sans dépose complète de la vanne. The valve body is closed by the threaded plug (17), its removal allows the piston to be removed and the internal state of the body to be checked without removing the valve completely.

Cette disposition est utile lors des rechargements et des épreuves de pression réglementaires. This provision is useful during reloading and regulatory pressure tests.

Afin d'éviter I'ouverture accidentelle de la vanne, une tige filetée (22) solidaire du chapeau (24), est vissée dans l'orifice (23) du support de clapet (10), lequel est maintenu appliqué sur son siège, par la traction de la tige filetée. In order to avoid accidental opening of the valve, a threaded rod (22) integral with the bonnet (24) is screwed into the orifice (23) of the valve support (10), which is kept applied on its seat, by pulling the threaded rod.

Le chapeau assure par ailleurs la protection du filetage (6) du raccord fileté de sortie. The cap also protects the thread (6) of the threaded outlet connector.

Le blocage de la vanne en position fermée est -particulièrement utile lors du transport, dé réservoirs sous pression ou dans le cas de citernes mobiles. Blocking the valve in the closed position is particularly useful during transport, pressure tanks or in the case of portable tanks.

Le dispositif de blocage permet par ailleurs, d'effectuer un test de déclenchement de la vanne sans perte de fluide. The blocking device also makes it possible to carry out a valve trigger test without loss of fluid.

Pour cela, il suffit de bloquer puis de dévisser légèrement le chapeau (24) dès la décompression de la chambre, le piston et-le clapet coulissent dans le corps et le chapeau vient en butée sur le raccord (6), et obture la sortie du fluide, par l'intermédiaire du joint (25). For that, it is enough to block then to slightly unscrew the cap (24) as soon as the chamber is decompressed, the piston and the valve slide in the body and the cap comes into abutment on the fitting (6), and closes the outlet. fluid, via the seal (25).

Le bon fonctionnement de la vanne est vérifié par le blocage en rotation du chapeau, il suffit ensuite de serrer celui-ci, pour refermer le clapet. The proper functioning of the valve is checked by the blocking in rotation of the bonnet, it then suffices to tighten it, to close the valve.

Cette disposition est utile dans les systèmes de sécurité, lors des essais périodiques de fonctionnement. This provision is useful in safety systems, during periodic functional tests.

La présente invention s'applique à tous circuits de fluide spus pression ou lorsque la pression amont doit être compensée par la pression avale, ce qui est le cas notamment dans certains réseaux propres à l'industrie chimique ou de réservoirs sous pression tels que ceux utilisés pour l'arrosage, l'épandage ou l'extinction des incendies.  The present invention applies to all spus pressure fluid circuits or when the upstream pressure must be compensated by the downstream pressure, which is the case in particular in certain networks specific to the chemical industry or of pressure tanks such as those used. for watering, spreading or extinguishing fires.

Claims (4)

REVENDICATIONS 1) Vanne différentielle pour contrôle de cicuit de fluide sous pression comportant un piston (7) avec ajutage calibré (11) solidaire d'un clapet d'obturation (9) appliqué par la pression différentielle, sur le siège (26) caractérisée en ce qu une contre pression appliquée en aval de la vanne est susceptible de repousser le clapet afin d'obtenir un effet de soupape. 1) Differential valve for checking the pressure fluid circuit comprising a piston (7) with calibrated nozzle (11) integral with a shut-off valve (9) applied by differential pressure, on the seat (26) characterized in that that a back pressure applied downstream of the valve is liable to push back the valve in order to obtain a valve effect. 2) Dispositif selon la revendication 1) caractérisé en ce que la fermeture et l'ouverture du clapet sont assujettis respectivement à l'obtu- ration ou à l'ouverture de l'orifice d'échappement (16), au moyen d'un dispositif mécanique, pneumatique ou électrique. 2) Device according to claim 1) characterized in that the closing and opening of the valve are subject respectively to the sealing or opening of the exhaust orifice (16), by means of a mechanical, pneumatic or electrical device. 3) Dispositif selon la revendication 1) caractérisé en ce qu'une pression supérieure à la pression différentielle appliquée au conduit de sortie (2) provoque l'ouverture du clapet et l'insertion du courant de fluide. 3) Device according to claim 1) characterized in that a pressure greater than the differential pressure applied to the outlet conduit (2) causes the opening of the valve and the insertion of the fluid stream. 4) Dispositif de sécurité selon la revendication 1) caractérisé en ce que le blocage du clapet sur le siège est obtenu par une tige de traction filetée, vissée d'une part dans le clapet en (23), d'autre part dans le chapeau (24), lequel vient en applique sur le raccord de sortie (6).  4) Safety device according to claim 1) characterized in that the blocking of the valve on the seat is obtained by a threaded pull rod, screwed on the one hand in the valve at (23), on the other hand in the cap (24), which is applied to the outlet fitting (6).
FR8805594A 1988-04-27 1988-04-27 IMPROVEMENT OF DIFFERENTIAL VALVES Expired - Fee Related FR2630806B3 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8805594A FR2630806B3 (en) 1988-04-27 1988-04-27 IMPROVEMENT OF DIFFERENTIAL VALVES
ES89401199T ES2047138T3 (en) 1988-04-27 1989-04-27 DIFFERENTIAL VALVE WITH TRIGGER FOR PRESSURE FLUID CIRCUIT.
EP19890401199 EP0340111B1 (en) 1988-04-27 1989-04-27 Triggered differential valve for a pressurized-fluid circuit
DE1989611579 DE68911579T2 (en) 1988-04-27 1989-04-27 Differential release valve for lines of liquids under pressure.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8805594A FR2630806B3 (en) 1988-04-27 1988-04-27 IMPROVEMENT OF DIFFERENTIAL VALVES

Publications (2)

Publication Number Publication Date
FR2630806A1 true FR2630806A1 (en) 1989-11-03
FR2630806B3 FR2630806B3 (en) 1990-09-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8805594A Expired - Fee Related FR2630806B3 (en) 1988-04-27 1988-04-27 IMPROVEMENT OF DIFFERENTIAL VALVES

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FR (1) FR2630806B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651674A1 (en) * 1996-12-12 1998-06-18 Wabco Gmbh Valve device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651674A1 (en) * 1996-12-12 1998-06-18 Wabco Gmbh Valve device

Also Published As

Publication number Publication date
FR2630806B3 (en) 1990-09-21

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