EP0478100B1 - Dispositif d'arrêt pour une conduite à gaz - Google Patents

Dispositif d'arrêt pour une conduite à gaz Download PDF

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Publication number
EP0478100B1
EP0478100B1 EP91250253A EP91250253A EP0478100B1 EP 0478100 B1 EP0478100 B1 EP 0478100B1 EP 91250253 A EP91250253 A EP 91250253A EP 91250253 A EP91250253 A EP 91250253A EP 0478100 B1 EP0478100 B1 EP 0478100B1
Authority
EP
European Patent Office
Prior art keywords
shut
flap
sealing
hollow body
gas conduit
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
EP91250253A
Other languages
German (de)
English (en)
Other versions
EP0478100A3 (en
EP0478100A2 (fr
Inventor
Hans-Jürgen Janich
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0478100A2 publication Critical patent/EP0478100A2/fr
Publication of EP0478100A3 publication Critical patent/EP0478100A3/de
Application granted granted Critical
Publication of EP0478100B1 publication Critical patent/EP0478100B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L11/00—Arrangements of valves or dampers after the fire
    • 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
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4358—Liquid supplied at valve interface
    • Y10T137/4442—External pressure
    • 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
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • 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
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm
    • 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
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining

Definitions

  • the invention relates to a shut-off device for a gas line, in particular with a large cross section, according to the preamble of claim 1.
  • a shut-off device for a gas line in particular with a large cross section, according to the preamble of claim 1.
  • Such a device is already known from document DE-A-3 813 663.
  • Shutoff devices of the type mentioned are known in practice in various embodiments.
  • shut-off devices were also approved by the responsible safety authorities, which in the gas flow direction had two butterfly valves arranged one behind the other, i.e. H. contain two shut-off levels one behind the other.
  • the space formed between the butterfly valves must be acted upon with a barrier medium, the pressure above the form, d. H. the pressure of the first butterfly valve - in the gas flow direction.
  • the invention is therefore based on the object to provide a shut-off device of the type required in the preamble of claim 1, which is characterized by its space-saving and relatively simple construction with reliable compliance with the necessary safety regulations.
  • the shut-off element in particular the pivotable shut-off valve, contains an additional cover which is arranged at a sufficiently large distance from the plate-shaped shut-off body in such a way that this cover together with the shut-off body form a closed space (hollow body) and thus one opposite the two spaces of the Gas line sealed gas-tight Chamber forms.
  • This ensures that a pressure prevails or is maintained within this closed chamber which deviates from the pressures which are present in the two spaces of the gas line (in front of and behind the butterfly valve).
  • a pressure monitoring device is connected to the closed chamber.
  • shut-off flap when using this shut-off device according to the invention in a shut-off device for gas lines, the pressure inside the gas-tightly sealed chamber of the shut-off device (shut-off flap) changes compared to a set target pressure, then damage to the additional cover or the plate-shaped shut-off body is indicated. A gas transfer or exit to or from the gas spaces of the associated gas line is not possible due to the construction according to the invention. This monitoring for the full functionality of the shut-off device is guaranteed both when the shut-off position and when the shut-off passage (shut-off flap) is open.
  • shut-off device for gas lines known from US 4,077,432, which has a so-called Venetian blind arrangement with respect to the shut-off devices.
  • This is a shut-off device with several shut-off flaps lying close together in one level in the shut-off position, each of which can be rotated about its central axis into the open position in such a way that the flat sides of the shut-off flaps lie approximately parallel to the axis of the gas line, i.e. in the direction of flow and only represent a relatively small flow obstacle.
  • US 4,077,432 provides for the introduction of sealing air through the axes of rotation of the individual louvre flaps designed as hollow shafts, for this to flow through the hollow louvre flaps and for the narrow end faces to exit through the passageways into the sealing air ducts, also in the area between the immediate ones a sealing air duct is formed in each case against mutually sealing louver flaps.
  • the embodiment according to the invention differs from this in particular in that it sets a very specific pressure in the closed chamber of the shut-off element and monitors whether this pressure changes, ie whether the chamber has a leak, which is always an indication of damage to the walls of this chamber represents.
  • the pressure monitoring device can advantageously be arranged on the outside of the gas line housing and in the line connection between the gas-tight chamber and an external pressure source for a shut-off medium, preferably a gaseous locking medium, the pressure monitoring device expediently via a flexible pressure medium line with the gas-tightly sealed chamber in the shut-off element connected is.
  • a shut-off medium preferably a gaseous locking medium
  • an underpressure or an overpressure of a predeterminable size can be introduced and maintained there in a suitably adapted manner via the monitoring device.
  • shut-off level in comparison to the known shut-off devices with two shut-off levels or shut-off devices located one behind the other, needs to be provided for each shut-off device, which on the one hand takes up little space and on the other hand makes it relatively simple overall construction, especially with regard to the entire associated shut-off device, leads.
  • shut-off device 1 and 2
  • this shut-off device being designed in the form of the particularly preferred pivotable shut-off valve and used in gas lines of relatively large dimensions.
  • two pivotable butterfly valves 1 and 2 viewed in the gas flow direction — are arranged next to one another in the housing 3 of an associated shut-off device in a gas line, the first butterfly valve 1 and the second butterfly valve 2 being of the same type can be executed and driven and can thus shut off or release half of the cross section of the housing 3.
  • the clear cross section of the housing 3 can correspond to an associated gas line, which is not illustrated in detail here. 1 shows the left, first butterfly valve 1 in its fully open position and the right, second butterfly valve in its completely closed position.
  • the butterfly valves 1, 2 lie sealingly against a housing 3 (on the inner walls) which is fixedly arranged within the housing 3 with a central web 35 and extends around the entire inner peripheral side of the housing 3 and with the entire peripheral edge region of each butterfly valve 1, 2 is in sealing engagement when the associated butterfly valve is closed. In this way, the spaces of the gas line located on different or opposite sides of the butterfly valves 1, 2 are separated from one another.
  • the flap actuation shaft 6 has a plurality of actuation arms 7 which are firmly connected to it and which engage on articulated connecting rods 11 on one side of the butterfly valve 2 or 1.
  • a suitable gear 8, which is part of the drive device 5, can be assigned to one end of each flap actuation shaft 6.
  • FIG. 1 shows that a shut-off device for gas lines of relatively large dimensions can be designed with single-leaf as well as with multi-leaf swing flaps (in the latter case then side by side), each wing of such a swing flap being formed by a swiveling shut-off flap.
  • shut-off device is the use in the form of a pivotable shut-off valve in a gas switch, as illustrated in FIG.
  • a pivotable shut-off valve in a gas switch, as illustrated in FIG.
  • only a single pivotable butterfly valve is used, which can be designed in the same way as the first butterfly valve according to Figure 1, so that it is also provided with the reference number 1.
  • the butterfly valve 1 is used to forward an incoming gas stream symbolized by arrow 19 either via a first branch connection 17 in the direction of arrow 21 or - as set in FIG. 2 - via a second branch connection 18 in the direction of arrow 20 .
  • the butterfly valve 1 can in turn be pressed tightly against the sealing seat 4 in the region of the second branch connection 18 or against the sealing seat 4 in the region of the first branch connection 17 by the flap actuating shaft 6 via actuating arms 7 and actuating link rods 11.
  • the rotary movement of the flap actuation shaft 6 in one direction or the other can in turn be carried out by the drive device 5 with the gear 8, the ends of the actuation shaft 6 being supported in shaft bearings 9 with bearing housings 10.
  • each of the shut-off valves forming a shut-off valve 1, 2 has a closed cavity or a closed chamber 13.
  • This chamber 13 results from the fact that each pivotable butterfly valve 1, 2 contains as a main part a plate-shaped shut-off body 14 and a preferably also plate-shaped additional cover 15, both of which are at a sufficiently large distance from one another and essentially parallel to one another to form a substantially flat, plate-shaped and sufficiently dimensionally stable component are firmly connected.
  • the plate-shaped shut-off body 14 and the additional cover 15 together form the chamber 13, which is sealed gas-tight with respect to the spaces of the gas line (in front of and behind each shut-off flap) the pressures prevailing in the two spaces in front of and behind each butterfly valve 1, 2 of the gas line deviate.
  • the chamber 13 is connected to a pressure monitoring device indicated at 16 in FIGS. 1 and 2.
  • the pressure monitoring device 16 is preferably arranged on the outside of the associated housing 3 (in FIG. 1) or 12 (in FIG. 2). It is also located in a line connection between the chamber 13 and a suitable, known (therefore not illustrated in more detail) pressure source for a barrier medium, the connection to the pressure source being indicated by a line section 22 that can be shut off, while the connection between the pressure monitoring device 16 and the gas-tight chamber 13 of each butterfly valve 1, 2 is essentially formed by a flexible pressure medium line 23 (see FIG. 1), so that the pivoting movement of the associated butterfly valve is not impaired by the connecting line to the pressure monitoring device 16.
  • FIGS. 3 to 7 some training options for the flap peripheral edge on the one hand and for the housing sealing seat and also for sealing elements arranged therebetween are explained below.
  • FIGS. 3 to 7 only one peripheral edge section is shown on the example of the closed butterfly valve 1 and the associated longitudinal section of the housing sealing seat 4 on an enlarged scale; the overall arrangement can be easily imagined if one considers the application examples of the butterfly valve 1, 2 in FIGS. 1 and 2 in a corresponding manner.
  • the butterfly valve 1 which can be pivoted in the direction of the arrow 24 (corresponding to the arrows 6a and 6b in FIG. 1), has a peripheral wall 25 which closes the gas-tight chamber 13 towards the peripheral edge of the valve and which has the plate-shaped shut-off body 14 and the likewise plate-shaped cover 15 connects to each other in the area of their peripheral edges, d. H. this peripheral wall 25 can be welded gas-tight to the peripheral edges of the shut-off body 14 and the cover 15.
  • the peripheral wall 25 - viewed in cross section - merely provides the inner leg of a cross-sectionally U-shaped circumferential groove, the outer leg of which forms an outer circumferential wall 27.
  • the circumferential trough 26 with its walls 25 and 27 protrudes from the plane of the additional cover 15 against the sealing seat 4, the side of the circumferential trough 26 pointing towards the sealing seat 4 being open.
  • rubber-elastic sealing strips are attached by means of clamping strips 29, which ensure sufficient sealing of the peripheral groove 26 forming the outer peripheral edge of the butterfly valve 1 with respect to the housing sealing seat 4 wear.
  • the walls of this circumferential channel 26 simultaneously delimit a barrier medium cavity 30 which is open towards the housing sealing seat 4 and which will be discussed again below.
  • the side 31a of the hollow body 31 which is opposite the peripheral wall region of the butterfly valve 1, in this case the peripheral groove 26, and which can also be referred to as a sealing seat surface, has either - over the length of the hollow body - as shown in Figure 3 - a number of appropriately distributed through openings 33 or one or more sufficiently large slots, which - as can be seen in Figure 3 - are each designed and arranged so that they are from the open side of the circumferential groove 26th delimiting sealing strips 28 are included, so that when the shut-off valve 1 lies sealingly against the sealing seat 4 in its shut-off position, an open connection between the interior of the hollow body 31 and the barrier medium subspace 30 of the circumferential groove 26 is established via the through openings 33.
  • the interior of the hollow body 31 is acted upon with a suitable barrier medium (preferably a gaseous barrier medium), then the flap peripheral edge region is also subjected to this barrier medium through the partial space 30 of the peripheral groove 26. In this way, an extremely reliable seal between the peripheral edge of the butterfly valve 1 and the housing sealing seat 4 is guaranteed.
  • a suitable barrier medium preferably a gaseous barrier medium
  • FIG. 4 shows an embodiment variant of the exemplary embodiment just explained with reference to FIG. Since this embodiment variant differs in the main only in the type of sealing elements and the circumferential groove adapted therein compared to FIG. 3, the same reference numerals can be chosen for the similar components, which means that these parts need not be explained again.
  • the U-shaped circumferential groove 26 ′ which essentially forms the outer peripheral edge region of the butterfly valve 1, is only slightly wider than the circumferential groove 26 in FIG. 3.
  • two spring steel strips 34 bent approximately in cross section which are fastened and clamped on the inner sides of the circumferential walls 25 and 27 In the shut-off position of the butterfly valve 1, place it tightly against the housing sealing seat 4 under elastic deformation.
  • FIG. 5 illustrates a further embodiment variant of the embodiment described with reference to FIG. 3, so that here again all parts of the same type can be provided with the same reference symbols.
  • the main difference of this embodiment variant compared to Fig. 3 and Fig. 4 can be seen in the fact that the seals 28 'on the barrier medium subspace 30 are designed in the form of keder seals.
  • a circumferential channel essentially forming the flap peripheral edge region with the barrier medium subspace 30 delimited by it - viewed in cross section - is oriented approximately at right angles to the gas-tight chamber 13 of the butterfly valve 1 and is open , there is also the possibility, in the manner illustrated in FIG. 6, of forming a circumferential channel 36 with a U-shaped cross section in an outward (toward the outer peripheral edge) extension of the gas-tight chamber 13 provided between the shut-off body 14 and the cover 15.
  • the transverse web of this U forms the circumferential wall 37 which closes the chamber 13 to the flap circumferential edge, while in a roughly straight extension of the cover 15 to the outside a circumferential wall part 38 as a longer U-leg and approximately in a straight line Extension of the shut-off body 14, a peripheral wall part 39 are formed as a shorter U-leg.
  • Each of these two peripheral wall parts 38, 39 carries on its free edge pointing towards the housing sealing seat a flat, circumferential, rubber-elastic sealing lip 40, which is assigned a cover strip 41 on one side (in each case on the upper side in FIG. 6).
  • the housing sealing seat 4 also contains a hollow body 42, which is connected to an external barrier medium pressure source via a pipe connection piece 43.
  • This hollow body 42 is delimited - apart from the outer housing wall - by a narrow circumferential wall 42a and a broad circumferential wall 42b, the clear distance between these two circumferential walls 42a, 42b being the clear distance between corresponds to the peripheral wall parts 38 and 39 of the peripheral groove 36.
  • the inward-facing free edge of the narrow circumferential wall 42a is also opposite the outward-pointing free edge of the sealing lip 40 on the longer circumferential wall part 38, while the inward-pointing free edge of the wider circumferential wall 42b of the hollow body 42 of the outwardly facing free edge of the sealing lip 40 bears against the shorter peripheral wall part 39 of the butterfly valve 1;
  • the cover strips 41 each abut a side surface of the associated peripheral wall 42a or 42b of the hollow body 42. In this way, the butterfly valve 1 can only be opened in the direction of arrow 44 and pivoted into the shut-off position (FIG. 6) in the opposite direction to arrow 44.
  • a barrier medium subspace 30 is again formed within the circumferential groove 36, which is open to the outside, that is to say in the direction of the hollow body 42, and is in open communication with the inside of this hollow body 42 when the Butterfly valve 1 is in its shut-off position.
  • the shut-off device is the shut-off valve 1
  • the gas-tight chamber 13 of which is essentially made up of the plate-shaped shut-off body 14 and the plate-shaped one additional cover 15 is formed.
  • the gas-tight chamber 13 towards the flap peripheral edge is formed by the web 45 of a circumferential steel profile 46, which is illustrated in FIG. 7 as a double-T profile, but also by another suitable steel profile, such as, for. B. U-profile can be formed.
  • the housing sealing seat 4 contains a hollow body 47, which in turn can be connected by a pipe connection piece 43 to an external barrier medium pressure source in order to be able to introduce barrier medium under pressure into the interior of the hollow body 47 in the manner explained.
  • the hollow body 47 can have an approximately U-shaped cross section and run in a channel shape over the inner peripheral region of the associated housing, its open channel side pointing towards the side facing it in the peripheral edge region of the butterfly valve 1, in particular its shutoff body 14.
  • the hollow body 47 has two walls 47a and 47b directed against the butterfly valve 1, each of which carries a suitable circumferential sealing element 48 on its free edges, which comes into sealing engagement with the opposite side of the butterfly valve 1 when the butterfly valve 1 is in its shut-off position located.
  • the two circumferential sealing elements 48 are formed by spring steel strips which are bent and clamped approximately in a U-shaped cross section, approximately the same as in the example in FIG.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipeline Systems (AREA)
  • Lift Valve (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Pipe Accessories (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Safety Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (12)

  1. Dispositif de fermeture pour une conduite à gaz, en particulier à grande section transversale, comportant un boîtier de conduite à gaz pouvant être monté dans la conduite à gaz et au moins un organe de fermeture, en particulier un clapet de fermeture pivotant (1,2), l'organe de fermeture comportant un corps de fermeture (14), en forme de plaque, qui repose, en position fermée, de façon étanche, dans un siège d'étanchéité (4) fixé sur le boîtier de conduite à gaz, et qui de ce fait sépare, l'un de l'autre, les espaces de la conduite à gaz se trouvant sur des côtés différents de l'organe de fermeture, et le siège d'étanchéité (4) s'étendant dans la zone de bord du corps de fermeture (14) en forme de plaque sur toute sa périphérie, caractérisé en ce que l'organe de fermeture (1,2) comporte un recouvrement supplémentaire (15) qui forme, conjointement avec le corps de fermeture (14), une chambre (13) fermée, de façon étanche au gaz, par rapport aux deux espaces de la conduite à gaz, dont la pression (P₂) s'écarte des pressions (P₁ et P₃) existant dans les deux espaces de la conduite à gaz, et qui est raccordée à un dispositif de contrôle de pression (16).
  2. Dispositif de fermeture selon la revendication 1,
    caractérisé en ce que le dispositif de contrôle de pression (16) est agencé sur le côté externe du boîtier de la conduite à gaz (3,12), ainsi que dans la liaison de conduite (22,23) pouvant être fermée, entre la chambre (13) étanche au gaz et une source de pression externe pour un fluide de fermeture, de préférence un fluide de fermeture à gaz.
  3. Dispositif de fermeture selon la revendication 2,
    caractérisé en ce que le dispositif de contrôle de pression (16) est relié, par l'intermédiaire d'une conduite flexible (23) de fluide sous pression, à la chambre (13) fermée de façon étanche au gaz, dans l'organe de fermeture (1,2).
  4. Dispositif de fermeture selon la revendication 1,
    caractérisé en ce que le clapet de fermeture pivotant (1), formant l'organe de fermeture, comporte une paroi périphérique (25,37,45), fermant la chambre (13) étanche au gaz vers le bord périphérique du clapet, et reliant ensemble, à chaque fois, le corps de fermeture (14) en forme de plaque et le recouvrement (15) également en forme de plaque, dans la zone de leurs bords périphériques.
  5. Dispositif de fermeture selon la revendication 4, la zone des bords périphériques du clapet de fermeture (1,2) pouvant être poussée, de façon à rendre étanche, contre le siège d'étanchéité (4),
    caractérisé en ce que ce siège d'étanchéité (4) du boîtier comporte un corps creux (31,42,47), qui peut être alimenté par un fluide de fermeture sous pression, et dont le côté opposé au clapet de fermeture (1) peut être fermé par un côté de la zone périphérique (26,26′,36) du clapet, par interposition d'éléments d'étanchéité périphériques (28,28′,34,40,48).
  6. Dispositif de fermeture selon la revendication 5,
    caractérisé en ce que la paroi périphérique (45) du clapet de fermeture (1) est formée d'un profilé périphérique (46) en acier, en particulier un profilé en U ou en double T, le corps creux (47) du siège d'étanchéité étant ouvert sur son côté opposé à la zone des bords périphériques du clapet de fermeture (1) et portant deux éléments d'étanchéité (48), qui s'étendent sur la longueur du siège d'étanchéité (4), qui viennent au contact d'une face latérale (14) du clapet en position d'étanchéité et qui limitent ce côté du corps creux.
  7. Dispositif de fermeture selon la revendication 5,
    caractérisé en ce que le clapet de fermeture (1) porte, dans sa zone des bords périphériques (26,26′,36), deux éléments d'étanchéité périphériques (28,28′,34,40), agencés à une distance l'un de l'autre, limitant, conjointement avec la paroi périphérique (25,25′,37) du clapet, un espace partiel (30) pour le fluide de fermeture, qui est ouvert vers le siège d'étanchéité (4) du boîtier et qui peut être relié à l'intérieur du corps creux (31,42) du siège d'étanchéité, et poussés dans l'état fermé du clapet de fermeture, de façon étanche, contre le côté opposé et au moins partiellement ouvert du corps creux.
  8. Dispositif de fermeture selon la revendication 5,
    caractérisé en ce que la zone des bords périphériques est formée, pour l'essentiel, d'une gorge périphérique à peu près en forme de U en section transversale, dont l'une des parois forme la paroi périphérique fermant la chambre (13) vers le bord périphérique du clapet, et qui limite l'espace partiel (30) pour le fluide de fermeture.
  9. Dispositif de fermeture selon l'une des revendication 5 à 8,
    caractérisé en ce que les éléments d'étanchéité périphériques, prévus entre l'un des côtés du corps creux (31) et la zone des bords périphériques du clapet de fermeture (1), sont formés de bandes d'étanchéité (28,28′) élastiques, en caoutchouc.
  10. Dispositif de fermeture selon l'une des revendication 5 à 8,
    caractérisé en ce que les éléments d'étanchéité périphériques, prévus entre l'un des côtés du corps creux (31,47) et la zone des bords périphériques du clapet de fermeture (1), comportent des bandes élastiques (34,48) en acier, comprimés et cintrés à peu près en forme de U en section transversale.
  11. Dispositif de fermeture selon l'une des revendication 5 à 8,
    caractérisé en ce que les éléments d'étanchéité périphériques, prévus entre l'un des côtés du corps creux (31) et la zone des bords périphériques du clapet de fermeture (1) sont formés de joints à lèvres (40) élastiques, en caoutchouc, avec des bandes de recouvrement associées (41).
  12. Dispositif de fermeture selon l'une des revendications 1 à 11,
    caractérisé en ce que l'on prévoit au moins deux clapets de fermeture (1,2) qui sont agencés, en position fermée, l'un à côté de l'autre, dans un plan commun, les sièges d'étanchéité pour les bords opposés des clapets de fermeture (1,2) étant agencés à chaque fois, sur une tige centrale (35) du boîtier de conduite à gaz, tige qui s'étend transversalement à la conduite à gaz.
EP91250253A 1990-09-27 1991-09-18 Dispositif d'arrêt pour une conduite à gaz Expired - Lifetime EP0478100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4030611A DE4030611A1 (de) 1990-09-27 1990-09-27 Absperrorgan
DE4030611 1990-09-27

Publications (3)

Publication Number Publication Date
EP0478100A2 EP0478100A2 (fr) 1992-04-01
EP0478100A3 EP0478100A3 (en) 1992-07-22
EP0478100B1 true EP0478100B1 (fr) 1994-05-25

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EP91250253A Expired - Lifetime EP0478100B1 (fr) 1990-09-27 1991-09-18 Dispositif d'arrêt pour une conduite à gaz

Country Status (6)

Country Link
US (1) US5159954A (fr)
EP (1) EP0478100B1 (fr)
AT (1) ATE106131T1 (fr)
DE (2) DE4030611A1 (fr)
DK (1) DK0478100T3 (fr)
ES (1) ES2053275T3 (fr)

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Publication number Priority date Publication date Assignee Title
GB9112541D0 (en) * 1991-06-11 1991-07-31 Grovag Grossventiltech Blades for isolators
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Also Published As

Publication number Publication date
EP0478100A3 (en) 1992-07-22
DE4030611A1 (de) 1992-04-02
US5159954A (en) 1992-11-03
ATE106131T1 (de) 1994-06-15
DE59101714D1 (de) 1994-06-30
ES2053275T3 (es) 1994-07-16
EP0478100A2 (fr) 1992-04-01
DK0478100T3 (da) 1994-07-11

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