EP0462130B1 - Poste reducteur dote d'une fonction de securite dans un sens d'actionnement negatif - Google Patents

Poste reducteur dote d'une fonction de securite dans un sens d'actionnement negatif Download PDF

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Publication number
EP0462130B1
EP0462130B1 EP90903786A EP90903786A EP0462130B1 EP 0462130 B1 EP0462130 B1 EP 0462130B1 EP 90903786 A EP90903786 A EP 90903786A EP 90903786 A EP90903786 A EP 90903786A EP 0462130 B1 EP0462130 B1 EP 0462130B1
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EP
European Patent Office
Prior art keywords
safety
spindle
section
reducing station
station according
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.)
Expired - Lifetime
Application number
EP90903786A
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German (de)
English (en)
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EP0462130A1 (fr
Inventor
Hermann Dörr
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.)
Siemens AG
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Siemens AG
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Publication date
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Publication of EP0462130A1 publication Critical patent/EP0462130A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/16—Trip gear
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7761—Electrically actuated valve

Definitions

  • a safety valve in the sense of this application is understood to be a control valve with an additional safety function in the negative direction of action.
  • the invention is based on the object, starting from a generic reducing station, to design it in such a way that the safety function can be fulfilled with a very high degree of reliability.
  • the task is to reliably protect the system systems following in the direction of flow from excess pressure by securely closing the safety valve; to ensure this actuating function even in the event of a supply voltage failure, to increase the actuating speed of the safety valve in comparison to previous generic valves and to make the safety station having the new safety valve more affordable in terms of price than previous systems.
  • At least one additional safety line provides a very high level of reliability for the safety triggering, without the need to use relatively expensive and maintenance-intensive hydraulic systems.
  • at least two safety strands are provided, with a safety lever designed in the manner of a seesaw. More than two safety lines can be used, e.g. three, so that a one-of-three trigger condition can be implemented for triggering.
  • the invention therefore provides an operating line which has the valve spindle in its power flow, and at least one additional safety line.
  • the triggering of the safety stroke can - if several safety lines are implemented - be effected by each individual safety line, as already explained.
  • the operating line essentially consists of the motorized actuator with spindle drive and the actuator.
  • the additional, mutually independent safety lines are arranged between the spindle nut and the actuator of the operating line. They consist of safety spindles with braked, non-self-locking thread stages and at least one preloaded spring. In the braked state, the safety lines form a rigid connection between the second spindle section and the first spindle section of the operating line.
  • the safety stroke is actuated by the medium and supported by spring force.
  • the safety stroke is carried out via the safety strands by releasing the associated brakes on the spindle nuts of the non-self-locking thread stages of the safety strands.
  • the security spindle shafts which are secured against rotation, are pressed into the nuts by the force of the own medium and the at least one pretensioned spring, causing them to rotate when the brake is released, thereby enabling the actuator to be securely closed.
  • the safety lines work completely independently of each other. To safely close the actuator, simply release the brake on a safety line. Ball screws or threaded spindles with a correspondingly larger pitch can be used for the self-locking thread stages of the safety strands that can be braked. It is also advantageous that the security strands can also be checked below the security pressure in certain operating cases.
  • Figure 1 shows a reducing station for metering energy flows in the form of gases, vapors or water. It is intended in particular for thermal or industrial power plants. It has at least one control valve SV, with a throttle body 3, which is adjustable relative to a valve seat 1a, in a valve housing 1, to which the inflow line 2a is connected laterally and from which the outflow line 2b leads downward.
  • the incoming or outgoing steam flow is indicated by the flow arrows f1 and f2 in dashed lines, because the control valve according to FIG. 1 is shown in the closed position of its throttle body 3.
  • the throttle body 3 serves one of the working medium, for. B.
  • the control valve SV has a spindle drive ST arranged within its operating line BS, with valve spindle 4, spindle nut 5, spindle nut housing 6 and with an output shaft journal 7. A rotation of this output shaft journal 7 is converted into an axial movement of the spindle 4 via the spindle drive ST.
  • a control drive 80 with control motor 90 is coupled to the output shaft journal 7. This is additionally equipped with a handwheel 100 for adjusting the spindle by hand.
  • the control drive 80 adjusts the output shaft journal 7 and thus the throttle body 3 to assume its desired position in accordance with a manipulated variable which is supplied to it from the network to be controlled and which corresponds to the desired / actual value difference from the controlled variable and the desired value. This can be an intermediate position, it can also be the open-end position shown in FIG. 2 or the closed position shown in FIG. 1. In this safety valve with a negative direction of action, the safety target position is always the closed position shown in FIG. 1.
  • the spindle nut housing 6 is rotatably mounted within the spindle housing 8 by means of an axial bearing 9; the spindle nut 5, which is rotatably supported by an internal thread on the external thread of the spindle 4, is axially fixed within the spindle nut housing 6 and coupled on its outer circumference to the inner circumference of the spindle nut housing 6 in a rotationally fixed manner. So if the spindle nut 5 is set in rotation via the output shaft journal 7 and the spindle nut housing 6, then depending on the direction of rotation, the spindle 4 is axially displaced in the closing direction of the throttle body 3 or in the opening direction.
  • the spindle housing 8 is rigidly connected to the spindle guide body 11 by means of a lantern 10.
  • the latter serves for the precise guiding of the lower spindle end, which has the throttle body 3, and sealing of the spindle bushing 12 by means of a stuffing box seal, not shown.
  • the rotatable mounting of the spindle nut housing 6 by means of the thrust bearing 9 is supplemented by a further thrust bearing 13, which is inserted in a recess in the lantern head 10a, with a disk spring package 14 between the thrust bearing 13 and an extension 6a of the spindle nut housing serving to dampen shocks and to compensate for tolerances 6 is inserted and supported.
  • Lantern head 10a, thrust bearing 13, plate spring assembly 14 and extension 6a are in corresponding centric Recesses penetrated by the spindle 4.
  • valve spindle 4 is now subdivided into a first spindle section 4.1 on the throttle body side, which can be actuated by the own medium and spring force, and a second spindle section 4.2 on the drive side.
  • Both spindle sections 4.1, 4.2 are non-positively coupled to one another via a spring-elastic coupling 15 and an optionally rigid or released safety coupling K1, K2.
  • Two safety clutches K1, K2 are shown, each of which is part of a safety line S1 or S2 arranged in the bypass to the operating line BS.
  • the respective safety branch S1 or S2 releases the associated safety coupling K1 or K2, so that the first spindle section 4.1 thus executes a self-actuated quick-close of the throttle body 3 is released.
  • control valve is shown in the closed position, in which the throttle body 3 has been moved into its closed position by the control drive 8.
  • the throttle body 3 has been moved into its open-end position by the control drive 8, so that the maximum flow cross section within the valve housing 1 is released.
  • the control valve can be brought into the closed position by quick closing by means of at least one of the safety lines S1, S2 shown.
  • at least one pressure switch 15a, 15b is provided to query the actual pressure value on the outflow side II of the safety valve SV.
  • the safety clutch K1 is made dependent on a trigger signal from the pressure monitor 15a and the safety clutch K2 of the second safety line S2 is made dependent on a trigger signal of the pressure switch 15b, as is illustrated by the dashed signal lines 19a, 19b.
  • Both pressure switches 15a, 15b are connected to the inside of the outflow line 2b via measuring connection 16.
  • Both pressure monitors 15a, 15b act with their plungers on break contacts 17 of the electrical signal lines 19a, 19b, the break contacts 17 being connected in series to pushbuttons or pushbutton switches 18a, 18b with which the function of the safety lines S1, S2 is operated manually or remotely is verifiable.
  • the safety clutch K1 is first described below with reference to FIG. 2 (the safety clutch K2 is constructed accordingly).
  • the safety clutch K1 comprises a non-self-locking safety spindle drive 20a with a braking device 21a.
  • the brake device 21a includes a brake disk 23a which is connected to the safety spindle nut 22a and is rotatably supported therewith.
  • a brake magnet 24a which is designed as an electromagnet with a holding function in the example, normally holds the safety spindle nut 22a on its brake disc 23a and, in the event that a pressure-dependent trigger signal is supplied via the signal line 19a, releases the safety spindle nut 22a for rotation because the brake magnet 24a in it Trap is de-energized, i.e. de-energized.
  • the rotatable mounting of the safety spindle nut 22a and its brake disc 23a is indicated schematically by the two axial bearings 25a, the housing of the safety clutch K1 is designated by 26a. This has a hood-shaped extension 27a so that there is sufficient scope for the movement of the safety spindle 28a.
  • the safety lever 29 has at least one free end, it is shown as a double lever in the form of a rocker with the two elongated holes 31a, 31b at both ends.
  • the non-self-locking safety spindle 28a of the safety strand S1 which runs essentially parallel to the valve spindle axis a, is articulated via an elongated hole joint with pin 32a.
  • the housing 26a for the safety spindle drive 20a and the braking device 21a is rigidly coupled to the second spindle section 4.2 via a housing bridge 33 and is mounted in a longitudinally displaceable manner together with the second spindle section 4.2.
  • a housing 26a, 26b for preferably at least two safety spindle drives 20a, 20b and their associated braking devices 21a, 21b are connected to one another via a common housing bridge 33, and the housing bridge 33 is also connected to the second spindle section 4.2 namely via a flange 34 at its free end, firmly connected.
  • the spring-elastic coupling 15 between the first and the second spindle sections 4.1, 4.2 consists of a prestressed compression spring arrangement, which is more tensioned when the safety coupling K1 or K2 is not triggered than when the safety coupling K1 or K2 is triggered in FIG. 2, the compression spring arrangement 15 'biased.
  • the second safety line S2 with its safety clutch K2 is designed like the first safety line S1 with its safety clutch K1, which is why the same reference numbers are used for the same parts with the exception of the end letter; this is a in the first safety line S1 and b in the second safety line 52.
  • the spindle drive ST of the operating line BS is assigned to the second spindle section 4.2.
  • a safety line S1 or S2 responds.
  • the safety system can thus in principle already be implemented with one safety line, although the redundant safety line arrangement shown with at least two safety lines S1, S2 working in parallel is more advantageous.
  • the safety valve SV works with a negative direction of action; it is normally open or in an intermediate position and, in the event of a response (pressure in the outflow line 2b too high), is shifted into the closed position by the own medium and the force of the compression spring arrangement 15 '.
  • Shown is a steam valve with the housing 1, which against the throttle body 3, here z. B. a throttle body is flowed against.
  • the steam exerts an axial force on the throttle body 3, the spindle 4, the first and second spindle sections 4.1, 4.2, the safety spindles 28a, 28b and the spindle nut 5, which is proportional to the effective throttle body cross section and the pressure difference between the inlet nozzle 2a and the outlet nozzle 2b and in To direction works.
  • control drive 80 (which can also be referred to as an actuator) compensates for this force via the output shaft journal 7 and the spindle nut housing 6.
  • This control drive 80 is designed to be self-locking; it has a handwheel 100 with which the throttle body 3 can be moved via the spindle 4 into the closed position (FIG. 1) or into the open position (FIG. 2).
  • the safety spindle drives 20a, 20b which are not self-locking, are in the retracted state (corresponding to the position shown).
  • the two safety spindles 28a, 28b are braked via the associated safety spindle nuts 22a, 22b and the brake magnets 24a, 24b. This results in a rigid connection between the safety lever 29 and the housing bridge 33 or between the first and the second spindle section 4.1, 4.2.
  • the actuating pulses of the control drive 80 reach the throttle body 3 without play.
  • the throttle body 3 can always reach the closed position as soon as The safety stroke is triggered via one of the safety lines S1 or S2.
  • this also applies to the simultaneous activation of two safety lines S1 and S2.
  • the safety lever 29 assumes the position indicated by the broken line at 35 (shifted parallel to itself) when the throttle body 3 is displaced into its end position.
  • the normal operating position is reached again by moving the control drive 80 into the closed-end position (torque end position). H. the spring 15 is tensioned again and the safety lever 29 comes back into the horizontal position.
  • the two braking devices 21a and 21b of the safety strands are released via the control system, or freewheels installed in the safety strands always allow a rotational movement in the "tensioning direction".
  • Both safety lines S1, S2 can be checked separately via the buttons 17 and the brake magnets 24a, 24b. The check is also possible below the security print.
  • the spring force of the compression spring arrangement 15 'and the spring travel are dimensioned so large that a test can also be carried out in the pressureless system state, ie without the support of the own medium.
  • a helical compression spring arrangement could also, for. B. a disc spring package can be used.
  • the second spindle section 4.2 forms an abutment for the movement of the first spindle section 4.1 with its throttle body 3 into the desired safety position, which movement is released by the safety clutch K1 or K2.
  • FIG. 3 also shows the control drive 80 with control motor 90, a worm shaft 81, a pretensioned disk spring assembly 82 at one end of the worm shaft 81 and the output shaft 84 meshing with the worm 81 a via a worm wheel 83.
  • the regulating motor 90 works on the worm shaft 81 via a Countershaft 85.
  • the worm shaft 81 is held in the center of the worm wheel 83 with preloaded disk springs 82 and can be axially displaced on both sides. If a load torque occurs on the output shaft 84 that is greater than the torque set by the pretensioning of the disk springs, the worm shaft 81 moves out of its central position.
  • the worm shaft 81 actuates a torque switch 88 via a swivel lever 86 and a cam disk 87, which switches off the control motor 90 via a control device (not shown in detail) (eg contactor reversing switch).
  • the worm shaft 81 because it is self-locking, remains in its respective switch-off position.
  • the handwheel 100 can be seen from the exploded view according to FIG. 4, furthermore the control motor 90 and a lever 89 for switching from motor to manual operation.
  • a switch and signaling device is accommodated in the switch box 91.
  • the drive motor 90 is switched off and the handwheel 100 on the output shaft 84 (end shaft) uncoupled. This position is locked by a special (not shown) mechanism.
  • the motor 90 starts up, it is ensured that the handwheel 100 is switched off automatically and without danger to the operator and the drive motor 90 is coupled. Motor operation always has priority over manual operation.
  • 37a, 37b also refer to stop disks which sit firmly on the safety spindle 28a or 28b and have the task of limiting the stroke of the spindles 28a, 28b during the return movement.
  • the stop disks 37a, 37b are additionally shown in broken lines in the release position of the safety spindles 28a, 28b.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

Dans un poste réducteur doté d'une fonction de sécurité dans un sens d'actionnement négatif, pour le dosage de flux énergétiques sous forme de gaz, de vapeurs ou d'eau, notamment dans des centrales thermiques ou des centrales industrielles, la barre de commande (BS) d'une vanne de régulation (SV) est complétée par au moins une autre barre de sécurité (S1, S2) qui est munie de moyens permettant le déplacement en position de fermeture (déplacement s'effectuant en fonction d'un signal de déclenchement d'un contrôleur de pression) d'un premier tronçon de tige (4.1) prévu à une extrémité et portant un dispositif d'étranglement (3). Un deuxième tronçon de tige (4.2) accouplé à l'autre extrémité du premier tronçon, par l'intermédiaire de ressorts précontraints (15') et d'étages filetés de la tige de sécurité (20a...24a; 20b...24b) non autobloquants et pouvant être freinés de manière fixe, présente la commande de la tige (ST) transmettant, dans le cas normal, par l'intermédiaire des étages filetés de la tige de sécurité à freinage fixe, la poussée ou la traction axiale au premier tronçon de tige (4.1). En cas de déclenchement, le deuxième tronçon de tige (4.2) constitue une butée pour le déplacement du premier tronçon de tige (4.1) libéré par les axes de sécurité (28a, 28b), le dispositif d'étranglement (3) se trouvant dans la position prescrite (position de fermeture). De préférence, il est prévu au moins deux barres de sécurité (S1, S2) dotées chacune d'une commande non autobloquante (20a, 20b) des tiges de sûreté. Ces deux barres peuvent être en prise avec un levier de sûreté à deux bras (20), à la manière d'une bascule. Le fonctionnement des barres de sécurité (S1, S2) est contrôlable.

Claims (13)

  1. Station réductrice dotée d'une fonction de sécurité dans le sens d'une action négative pour le dosage de flux d'énergie sous la forme de gaz, de vapeur ou d'eau, notamment dans des centrales thermiques et dans des centrales industrielles, comportant
    - au moins une soupape de réglage et un corps d'étranglement (3) déplaçable par rapport au siège de la soupape de réglage et servant à régler une section transversale d'étranglement pouvant être traversée par le fluide de travail,
    - un dispositif d'entraînement, disposé dans une section de service, pour la tige de soupape comportant un embout d'arbre mené, une rotation de l'embout d'arbre mené étant convertie, par l'intermédiaire du système (ST) d'entraînement de la tige, en un déplacement axial de la tige de soupape (4) et par conséquent en le déplacement de réglage du corps d'étranglement (3), et
    - un dispositif d'entraînement de réglage (80) accouplé à l'embout (7) de l'arbre d'entraînement et comportant un moteur de réglage (90) servant à amener le corps d'étranglement (3) dans une position de consigne, caractérisée par le fait
    - que la tige de soupape (4) est divisée en une première section (4.1) qui est située du côté du corps d'étranglement et est actionnée par un fluide particulier et en une seconde section (4.2), située sur le côté entraînement,
    - que les deux sections (4.1, 4.2) de la tige sont couplées entre elles selon une liaison de force par l'intermédiaire d'un accouplement (15) présentant l'élasticité d'un ressort et d'un accouplement de sécurité (K1, K2), au choix, rigide ou détaché, et
    - que l'accouplement de sécurité (K1, K2) fait partie d'une branche de sécurité (S1,S2), qui est disposée en dérivation par rapport à la branche de service (BS) et qui, lors de l'apparition d'une pression de réponse qui atteint ou dépasse une valeur admissible sur le côté aval (II) de la soupape de réglage (SP), déclenche l'accouplement de sécurité (K1, K2) et libère de ce fait la première section (4.1) de la tige pour l'exécution d'une fermeture rapide, au moyen d'un fluide particulier et par la force d'un ressort, du corps d'étranglement (3).
  2. Station réductrice selon la revendication 1, caractérisée en ce qu'il est prévu au moins un contrôleur de pression (15a,15b) servant à interroger la valeur réelle de pression sur le côté aval (II) de la soupape de sécurité et que l'accouplement de sécurité (K1, K2) est rendu dépendant d'un signal de déclenchement du contrôleur de pression.
  3. Station réductrice selon la revendication 1 ou 2, caractérisée par le fait que l'accouplement de sécurité (K1,K2) comprend un dispositif non autobloquant (20a,20b) d'entraînement de la tige de sécurité, et comportant un dispositif de freinage (21a,21b) , et que le frein (23a,24a; 23b,24b) du dispositif de freinage peut être desserré par un signal de déclenchement qui dépend de la pression et qui peut être envoyé au dispositif de freinage.
  4. Station réductrice suivant la revendication 3, caractérisé par le fait que l'accouplement (15), qui présente l'élasticité d'un ressort, et l'accouplement de sécurité (K1, K2) sont agencés de manière à transmettre la poussée ou la traction axiale, prédéterminée par le dispositif d'entraînement de réglage (80), de la seconde section (4.2) de la tige à la première section (4.1) de cette dernière, et que dans le cas du déclenchement, la seconde section (4.2) de la tige forme une butée pour le déplacement, libéré par l'accouplement de securité (K1,K2), de la première section (4.1) de la tige équipée de son corps d'étranglement (4), dans la position de consigne de sécurité.
  5. Station réductrice suivant la revendication 3 ou 4, caractérisée par le fait que le dispositif (20a,20b) d'entraînement de la tige de sécurité comporte un disque de frein (23a,23b), raccordé à l'écrou (22a,22b) de la broche de sécurité et supporté circonférentiellement par ce dernier, du dispositif de freinage (21a,21b), auquel cas il est prévu un aimant de freinage (24a,24b), qui bloque normalement l'écrou (22a,22b) de la broche de sécurité sur son disque de frein (23a,23b) et, dans le cas de l'envoi d'un signal de déclenchement qui dépend de la pression, libère l'écrou (22a,22b) de la broche de sécurité pour la rotation et la première section (4.1) de la tige pour le déplacement axial dans la direction de fermeture.
  6. Station réductrice suivant l'une des revendications 1 à 5, caractérisée par le fait que sur l'extrémité, située à l'opposé du corps d'étranglement (3), de la première section (4.1) de la tige est articulé un levier de sécurité (29), qui comporte au moins une extrémité libre, sur laquelle est articulée, par l'intermédiaire d'une articulation à lumière allongée (31a,32a;31b,32b), une broche de sécurité non autobloquante (28a,28b), qui s'étend sensiblement parallèlement à l'axe (a) de la tige de la soupape, de la branche de sécurité (S1,S2).
  7. Station réductrice suivant l'une des revendications 3 à 6, caractérisée par le fait qu'un boîtier (26a,26b) pour le dispositif (20a, 20b) d'entraînement de la broche de sécurité et pour le dispositif de frein (21a,21b) est accouplé rigidement à la seconde section (4.2) de la tige par l'intermédiaire d'un étrier (33) du boîtier et est supporté de manière à être déplaçable longitudinalement conjointement avec la seconde section (4.2) de la tige.
  8. Station réductrice suivant la revendication 6, caractérisée en ce que le levier de sécurité (29) est agencé sous la forme d'une bascule avec au moins deux bras, est articulé au moyen de son palier pivotant (30), sur l'extrémité, tournée à l'opposé du corps d'étranglement (33), de la première section (4.1) de la tige et que des broches respectives de sécurité (20a,20b) de branches de sécurité respectives (S1,S2) sont articulées sur les extrémités libres de la bascule.
  9. Station réductrice suivant l'une des revendications 3 à 6, caractérisée par le fait que respectivement un boitier (26a,26b) pour les au moins deux dispositifs (20a,20b) d'entraînement de la broche de sécurité et leurs dispositifs associés de freinage (21a,21b) sont reliés entre eux par l'intermédiaire d'un étrier commun (33) du boitier, et que l'étrier (33) du boitier est raccordé à la seconde section (4.2) de la tige de soupape (4).
  10. Station réductrice suivant l'une des revendications 3 à 9, caractérisée par le fait que l'accouplement (15), qui possède l'élasticité d'un ressort, entre les première et seconde sections (4.1, 4.2) de la tige, est constitué par un dispositif à ressort de pression (15') pouvant être précontraint, qui, dans le cas où l'accouplement de sécurité (K1,K2) n'est pas déclenché, est plus fortement armé que dans le cas où l'accouplement de sécurité (K1, K2) est libéré.
  11. Station réductrice suivant la revendication 10, caractérisée par le fait que l'accouplement (15) qui présente l'élasticité d'un ressort, est supporté, au voisinage de l'axe (a) de la tige, entre les deux sections (4.1, 4.2) de la tige.
  12. Station réductrice suivant l'une des revendications 6 à 11, caractérisée par le fait que l'accouplement (15), qui présente l'élasticité d'un ressort, est monté entre un palier pivotant (30) du levier de sécurité (29) et l'étrier (33) du boîtier, qui est distant de ce palier.
  13. Station réductrice suivant l'une des revendications 1 à 12, caractérisée en ce que le dispositif d'entraînement de broche (ST) de la branche de service (BS) possède, au niveau de sa seconde section (4.2), un écrou (5) monté de manière à pouvoir tourner sur cette section, et un carter (6) pour l'écrou de broche, qui supporte avec possibilité de rotation l'écrou de broche (5), mais le bloque axialement et comporte un bout d'arbre mené (7).
EP90903786A 1989-03-07 1990-03-06 Poste reducteur dote d'une fonction de securite dans un sens d'actionnement negatif Expired - Lifetime EP0462130B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907288A DE3907288A1 (de) 1989-03-07 1989-03-07 Stellantrieb fuer sicherheitsventile
DE3907288 1989-03-07

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EP0462130A1 EP0462130A1 (fr) 1991-12-27
EP0462130B1 true EP0462130B1 (fr) 1993-10-20

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EP90903786A Expired - Lifetime EP0462130B1 (fr) 1989-03-07 1990-03-06 Poste reducteur dote d'une fonction de securite dans un sens d'actionnement negatif

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US (1) US5152317A (fr)
EP (1) EP0462130B1 (fr)
JP (1) JPH04503989A (fr)
CN (1) CN1020653C (fr)
AU (1) AU631619B2 (fr)
DE (2) DE3907288A1 (fr)
WO (1) WO1990010784A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29801229U1 (de) 1998-01-27 1998-05-20 S & R Maschinenbau GmbH, 35315 Homberg Vorrichtung zum Regeln und/oder Schließen sowie zum Schnellschließen einer Stellvorrichtung
DE29807444U1 (de) * 1998-04-24 1998-08-20 Hartmann & Braun GmbH & Co. KG, 65760 Eschborn Schalteinrichtung zum Handbetrieb eines elektromotorischen Stellantriebs
DE20311032U1 (de) * 2003-07-17 2004-11-25 Cooper Cameron Corp., Houston Antriebsvorrichtung
CN110173590B (zh) * 2019-06-27 2020-05-05 爱诺阀门温州有限公司 一种双用执行器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1927509C3 (de) * 1969-05-30 1975-02-13 Bochumer Maschinenfabrik Arthur Schneider, 4630 Bochum Dampfdruckminder- und Dampfkühlventil mit Schnellöftnungseinrichtung

Also Published As

Publication number Publication date
JPH04503989A (ja) 1992-07-16
DE3907288A1 (de) 1990-09-13
CN1020653C (zh) 1993-05-12
EP0462130A1 (fr) 1991-12-27
DE59003162D1 (de) 1993-11-25
US5152317A (en) 1992-10-06
CN1048257A (zh) 1991-01-02
WO1990010784A1 (fr) 1990-09-20
AU5193990A (en) 1990-10-09
AU631619B2 (en) 1992-12-03

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