EP0891505A1 - Soupape a clapet a siege double avec securite anti-fuite - Google Patents

Soupape a clapet a siege double avec securite anti-fuite

Info

Publication number
EP0891505A1
EP0891505A1 EP97908217A EP97908217A EP0891505A1 EP 0891505 A1 EP0891505 A1 EP 0891505A1 EP 97908217 A EP97908217 A EP 97908217A EP 97908217 A EP97908217 A EP 97908217A EP 0891505 A1 EP0891505 A1 EP 0891505A1
Authority
EP
European Patent Office
Prior art keywords
flaps
double
valve
flap valve
leakage
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.)
Withdrawn
Application number
EP97908217A
Other languages
German (de)
English (en)
Inventor
Peter Mette
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19624969A external-priority patent/DE19624969C1/de
Priority claimed from DE19638931A external-priority patent/DE19638931C1/de
Application filed by Individual filed Critical Individual
Publication of EP0891505A1 publication Critical patent/EP0891505A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/24—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat

Definitions

  • the invention relates to a double-seat flap valve with leakage protection, in particular as a shut-off device in pipelines for the safe separation of hostile fluids, in particular for the food and beverage industry, according to the preamble of claim 1.
  • a double seat flap valve with leakage protection of the generic type is known from DE 2948534 A1. It has a leakage space between the two shut-off devices, from which any leaks due to seal wear or pressure surge or as a result of foreign bodies can be discharged to the outside without pressure.
  • the valve consists of two independent flap valves, the two similar shut-off elements being driven simultaneously by a single drive.
  • the leakage space has a flushing and a leakage outlet, both of which are forcibly actuated via an associated closing element depending on the position of the shut-off organs. In the open position of the flap valve, both outlets are closed while they are open in the closed position of the valve .
  • the valve is not arranged in the housing between the shut-off elements, but predominantly in the spigot of the shut-off elements which is mounted in the housing and is passed through it, and its through openings are forcedly controlled depending on the position of the valve by means of rotary slide-type pinning means.
  • the two double seat flap valves mentioned have a number of disadvantages.
  • they are relatively large because, in principle, they house two flap valves, the shut-off elements of which must be spaced from each other in such a way that they do not interfere with their movement during the closing or opening movement or the product flow in the open position restrict inappropriately.
  • relatively complex measures must be taken so that the two openings of the leakage space can be controlled as a function of the switching movement of the double-seat flap valve.
  • Each of the two flaps has two shaft journals, each of which must be mounted in the housing and also sealed there.
  • DE 2821 766 A1 or US 21 19816 each describe a double-seat flap valve in which the two flaps belonging to the clamping unit, in addition to an axis for pivoting movement about an axis arranged transversely to the pipeline, also perform an opposing displacement movement coaxial to the axis of the pipeline ⁇ lead.
  • the two flaps are initially moved out of their closed position during the opening process in the above sense, in order then to be pivoted in their approximated position into the open position of the double-seat flap valve.
  • This sequence of movements permits a construction of the valve which is considerably more space-saving than the two known valves mentioned at the beginning (DE 2948 534 A1, DE 2847 038 A1).
  • the two flaps can be pressed by their drive mechanism with their displacement movement, which is oriented coaxially to the axis of the pipeline, with a sealing force which presses against the respectively assigned seat surface is determined only by the dimensioning of the drive elements and the provision of sufficiently large drive forces.
  • the two flaps are designed in such a way that in the open position of the valve they delimit an interior space which is closed off between them, but which has no connection to the outside. Therefore, in the open position, this interior space can neither be drained into the open, nor can it be cleaned in the flow in this position, for example in order to clean off impurities due to sealing defects.
  • cleaning in this regard is necessary if such a valve would be used in the food or beverage industry, since during the opening and closing movement of the valve, the product flowing in it and the ones that delimit the interior Surfaces come into contact. Contamination and contamination of these surfaces then leads to the product being recontaminated.
  • the double-seat flap valve according to DE 2821 766 A1 forms an interior between the two flaps, which can be connected to the surroundings of the valve via at least one line.
  • the indication and possibly the removal of leakage and also a possibility of flushing the interior is given, however, such a configuration requires the arrangement of additional control elements which switch the connection paths to this interior.
  • the two flaps do not form a self-contained space, so that in this position neither a leakage indicator nor a purging of the valve in this area is possible.
  • DE-GM 71 12601 describes a double-seat flap valve in which a closing body essentially consists of an inner body and at least one plate that can be pressed onto the seat surface.
  • the inner body has two passages intersecting at right angles and is mounted in the spherical housing via at least one hollow cylindrical pivot axis engaging one of the passages.
  • the pressing plate is guided on the inner body in the longitudinal direction of the passage so as to be displaceable perpendicularly to the pivot axis, and a switching and locking means is provided on the plate and on the inner body, by means of which the position of the closing body and the Plate in the housing is adjustable.
  • this valve differs in that the two flaps maintain their sealing effect on the way from their closed to the open position with respect to an assigned middle housing part, the final body.
  • the interior in this final body is connected to its surroundings both in the closed and in the open position of the valve, so that leak detection and flushing is possible in each of these positions, but in the closed position of the valve between its housing and the final body formed a further interior, which must be connected to the environment via controllable connections so that the considerable switching leakage accumulating in this area when the valve closes can be dissipated. In the course of opening the valve, these connections must be closed by external switching devices.
  • shut-off flap with a housing and a closure flap which can be swiveled by ninety degrees from an open position into a closed position, the latter consisting of two valve disks which are arranged symmetrically on both sides of the swivel axis and can be driven in this manner are that their distance from each other is changeable.
  • the valve disks cooperate with seats provided in the housing in such a way that an increase in their distance in the closed position causes each valve disk to be seated against the associated seat.
  • the possibility is given to evacuate the space between the flap disks depending on the specific application or to apply excess pressure or to fill them with a barrier medium.
  • the space between the flap disks can be spooled both in the closed position and in the open position of the valve and also draime ⁇ ar (Fig. 4), if this is arranged appropriately for this space, this valve also does not leave little leakage and certainly not do not switch leakage-free, since the two flaps belonging to the shooting unit, which during the opening process are initially shifted from their closed position coaxially to the axis of the pipeline and in opposite directions to each other, during the opening process from the closed position a sealing effect of their sealing points on the circumference against the housing. Do not maintain the inner wall, but temporarily give up this sealing effect until they come into contact with a central swivel body and form a closed clamping unit in this position
  • the flap valves described in DE 29 48 534 A1 or DE 2847 038 A1 also have considerable switching leaks (in particular during the closing process), since the fluid trapped between the shut-off devices is discharged into the surroundings of the valve. During the opening process, they only switch to low-leakage if it is possible to control the two leakage openings and close them completely on the short twisting path of the shut-off element between its closing position and an intermediate position in which it is just closing. If this does not succeed, overlaps of the switching movements for the shut-off devices and the switching elements provided for controlling the leakage space openings are necessary, which has the consequence that switching leakages occur. Finally, it should be noted that with these valves too, the leakage space is only in the The closed position of the valve can be cleaned since it does not exist in the open position of the valve.
  • the arrangement of the shut-off elements and the leakage space openings in connection with the assigned control elements also does not allow the leakage process to be as large as possible, as is often required today, ideally with a passage cross-section that suits this Nominal cross section of the largest pipe connected to the valve corresponds.
  • the leakage drain cross-section is too small, there is a risk of an impermissible pressure build-up in the
  • the present invention has for its object to provide a double-seat flap valve with leakage protection of the generic type that switches low leakage or leakage ⁇ and whose leakage space is easy to clean both in the closed and in the open position.
  • the two flaps are initially coaxial with the axis while the sealing parts arranged on the circumference are kept sealed against the inner wall of an associated middle housing part of the pipeline and mutually displaced.
  • the entire unit which has two coaxial, on opposite sides of the Unit arranged shaft journal is rotatably mounted directly or indirectly in the housing part, can be moved to this position in the open position overall. Since on the one hand the leakage space remains closed in the open position, no product can enter it from the environment inside the valve, on the other hand it is possible to clean it also in the open position of the valve by supplying cleaning agent from the surroundings of the valve.
  • the unit consists only of the two flaps, each of which comes into abutment against one another at the circumference and thereby seals, and in this position absorb and limit all the leakage space.
  • the unit consists of the two flaps and a support arranged between them.
  • the unit which accommodates and delimits the leakage space comes into being when the flaps come into abutment via their sealing parts on their circumference on the support arranged between the flaps, on both sides of this and in each case sealing all around.
  • the pressure forces in the product ensure that the flaps are sufficiently pressed against one another or against the support so that the leakage space is reliably sealed off from the product when the valve is open.
  • the aforementioned pressure forces thus represent an additional factor usable closing force, the two flaps are caused by closing forces, which are provided by the existing Ant ⁇ eb, pressed against each other or respectively on the support.
  • the unit consisting essentially of the two flaps that the leakage space between the flaps is limited in the course of the opening or closing process and in the open position of the valve in that the flaps predominantly seal each other over these sealing points and that the wave tap in the area of these crossing or tangent sealing points, where they are enclosed in a ring-shaped sealing manner by sealing points which are adapted in their shape to the shaft journal.
  • the shaft journals are provided in the course of the opening or closing process and in the open position of the valve, in the area of the sealing points crossing or tangent, there through in their shape Correspondingly adapted sealing points are encircled in a ring-shaped sealing manner.
  • an advantageous embodiment provides that the two shaft pins each in a shaft bearing in the housing Find recording, the shaft bearings are each provided with longitudinal grooves that pass through the entire shaft bearing fluid permeable.
  • the proposed solution also has significant advantages over the known state of the art, in particular with regard to the realization of sealing forces between the flap and the housing.
  • the flaps in their closing division can be controlled in a defined manner against each other to press the assigned seat surfaces in the direction of the axis of the pipeline.
  • the size of the contact pressure is only a question of the design of the valve, so that the valve reliably blocks against higher product pressures than is the case with the known valves
  • leaks in the open position of the valve has at least one controlled connection to the surroundings of the valve, as is provided according to a further advantageous embodiment, on the one hand leaks can also be determined in this position and, if a second connection path is present, measures for Cleaning, rinsing and, if necessary, disinfection of the leakage space
  • the flaps can be displaced in the direction of the axis of the pipeline without difficulty such that the flaps guide one another or that they are each guided in or on or on the support or in a food box. This configuration ensures that the flaps do not tilt in their closed position while they are closing or opening, so that the desired leak-free switching is ensured.
  • the sealing points are in the peripheral area of the flaps. It is envisaged that these sealing points will each be realized by means of flap-side or housing-side sealing means.
  • the sealing means are designed as discrete seals, which are to be provided either in the circumferential area of the flaps or in the sealing area of the housing. Instead of discrete seals, it is also proposed that the sealing means by coating or sheathing the middle housing, in which the flaps are sealed should be realized with a suitable sealing material. In this case, the valve can be designed so that it switches absolutely leak-free.
  • the sliding movement of the rack causes the two gears to rotate in opposite directions, each of which, in conjunction with the threaded spindle / nut system, produces the opposite translatory sliding movement of the flaps.
  • the entire unit, consisting of the two flaps and the gear serving to translate the two flaps, is rotatably mounted in the valve housing via shaft pins arranged on both sides of a food box; the required rotary movement is also provided via the Ant ⁇ eb.
  • the drive provides a pressure medium with which the displacement movement of the flaps in the direction of the axis of the pipeline is effected on the basis of a pressure medium-operated second drive arranged between the flaps.
  • the elements of the second drive can also take over the guidance of the flaps mentioned at the beginning.
  • the actuator provides a rotary movement by means of an actuator, with which a knee-like arrangement is actuated to generate the sliding movement of the flaps in the direction of the axis of the pipeline.
  • a knee-like arrangement also has the advantage that the flaps, particularly in their closed position, are locked so that they can also withstand greater pressure forces or impacts.
  • Leakage discharge cross-sections that meet the condition of the US 3A standard can be achieved, as is also provided, in that the leakage openings distributed over the circumference of the central housing part are controlled by means of two axial slides.
  • a seat is formed in each of these sleeve-shaped axial slides and two such axial slides are arranged in the central housing part and are each pre-stressed by means of a spring coaxial to the axis of the Piping slidably and sealed against the middle part of the housing.
  • the housing be used without restriction to ensure the use of the double-seat flap valve -Inside wall of the middle housing part has at least one compensating bore, which, on the one hand, fills out into the interior of the middle housing via a first opening and, on the other hand, a second opening near the respective seat surface
  • FIG. 1a show a preferred first embodiment of the proposed double-seat flap valve, the flaps being shown in view and the flap shown on the right (FIG. 1) being in its closed position and the flap shown on the left (FIG. 1a) being in its position at the beginning shows the opening or closing movement;
  • 2.2a shows a central section (corresponding to the section shown in FIG. 2b with CC) through a second embodiment of the double-seat flap valve with a support in a plane perpendicular to the axis of the drive shaft, the valve in its closed position (FIG. 2) shown and FIG.
  • FIG. 2a also shows the double-seat flap valve in the closed position, the flaps coming into contact with the support; 1 b, 1 c a middle section (corresponding to the section marked with DD in FIG. 1 d) through a double-seat flap valve according to the first embodiment, a displacement antenna being provided between the flaps in a preferred first embodiment and the flaps one on the one hand in their closed position (FIG. 1b) and on the other hand at the beginning of the opening or closing movement (FIG. 1c); 1d shows a central section through the displacement drive according to FIGS. 1b, 1c in accordance with the section profile identified there by AA;
  • 2b shows a central section through the support and its adjacent components in accordance with a section profile marked BB in FIGS. 2, 2a; 3 shows a preferred embodiment of a shaft bearing shown in FIG. 2b with fluid-permeable longitudinal grooves; 2c shows a further central section (C'-C ') through the double-seat flap valve of the second embodiment in accordance with the section profile marked CC in FIG. 2b, the unit formed in contrast to the position of the valve in FIGS. 2 and 2a two flaps and the support ring, is in the open position of the valve; 4,4a is a central section through a third embodiment of the proposed double-seat flap valve in a plane perpendicular to the drive shaft, this embodiment having two axial slides and FIG.
  • FIG. 4a the closed valve on one side and FIG. 4a the likewise still closed one, which is at the beginning of the opening movement Valve shows, while the dashed representation of the flap and the support ring shows the full open position;
  • 5 shows the application of the proposed double-seat flap valve in its second embodiment as a connecting member between two cross-directed pipelines;
  • 2d shows a part of the double-seat flap valve in its second embodiment with a central housing part, which is made entirely of a suitable sealing material;
  • 4b, 4c the proposed double-seat flap valve in its third embodiment, the two axial slides being encased with a suitable sealing material and
  • FIG. 4b the closed position and FIG. 4c the loading
  • the opening division of the valve clarifies and Fig ß a detail in the area of the middle housing part for the purpose of
  • the proposed double-seat flap valve in a first embodiment consists of a housing 1, which is essentially constructed from a central housing part 1a and the two end-side housing parts 1b.
  • Two disk-shaped flaps 2, preferably circular, are oriented in their respective closing division in two mutually parallel planes transverse to the axis of the pipeline. They each seal by means of a sealing point 2a in their peripheral region against a seat 1d (FIG. 1) of the valve (closing and end position).
  • the sealing point 2a is designed as a discrete flap-side seal.
  • a leakage space 16 is provided between the flaps 2.
  • Figure 1a shows the position of the flap 2 at the beginning of the opening or closing movement. In the course of the two last-mentioned movements, the flaps 2 rotate in the shaft journal 5a. The translatory displacement movement of the flaps 2 is effected via a drive rod 3 which is guided coaxially in the shaft journal 5a.
  • FIGS. 1b, 1c and 1d disclose the configuration of a preferred sliding drive for the translational movement of the flaps 2 when applied to an embodiment according to FIGS. 1,1a.
  • FIG. 1b shows the flap 2 in its closed position, while FIG. 1c documents the position of the flap 2 at the beginning of the opening or closing movement.
  • Figure 1 d discloses a central section through the arrangement according to the Schntttveriauf A-A identified in Figures 1b and 1c. The middle section shown in FIGS. 1b and 1c results from the course of the section marked D-D in FIG. 1d.
  • the aforementioned figures are considered in the following in a synopsis.
  • a drive 7 (not shown) (FIG. 1d) drives a drive rod 3 which can be displaced translationally within the shaft journals 5a and which is designed as a double-acting toothed rack 3b between the two shaft journals 5a.
  • Each of the toothings of the toothed rack 3b is in engagement with a toothed wheel 3c, 3d arranged between the two flaps 2, each of which is coaxially pierced.
  • In each of these holes are one behind the other, in the middle of the gear 3c, 3d by a circumferential groove-shaped
  • the gearwheels 3c and 3d and the toothed rack 3b are accommodated in a food box 5 * which carries the shaft journals 5a, the food box 5 * in the respective penetration range of its four threaded bolts 3e, 3f, 3e 'and 3f with respect to the interior of the housing 1 , 1a are each sealed by a bellows 17 enveloping the respective threaded bolt and sealing the gland box 5 * with the area of the flaps 2 in question.
  • the anti-friction rod 3 is mounted within the shaft journals 5a (see FIG. 1d) arranged on both sides of the receptacle box 5 * in bearings 3 ⁇ which are received by a bore 5b in the shaft journals 5a, so that they can be displaced translationally.
  • the sealing points 2a of the flaps 2 enclose the shaft journals 5a according to a preferred embodiment, as can be seen from FIGS. 1 and 1a. With regard to the cleanability of the contact surfaces between the shaft journals 5a and the assigned area of the sealing points 2a, reference is made at this point to the following explanations for FIGS. 1, 1a and 2b.
  • the leakage L is discharged via the transverse opening 5c and the leakage hole 5d
  • FIGS. 2 and 2a A second embodiment of the proposed double-seat flap valve is illustrated in FIGS. 2 and 2a. Between the two flaps 2 there is a support 5, in which a support 3 is mounted, the support 5, for example as shown in FIG. 2b, in turn being rotatably mounted in the middle housing part 1a.
  • the Ant ⁇ ebswelle 3 is connected via a knee-like arrangement, consisting of a shaft-side joint 3a, a second joint G2, a lever 4, a first joint G1 and a flap-side joint part 2b, each with a flap 2.
  • a leakage space 16 is provided between the flaps 2.
  • Figure 2 shows the flap 2 in its closed position (end position), in which it is pressed onto the assigned seat 1d via the sealing point 2a.
  • the above-mentioned knee-like arrangement shortens the distance between the axis of the anti-shafts 3 and the first joint G1 and the flap 2 is brought to bear on the support 5, where it seals all the way round (FIG. 1a).
  • a mutual guidance of the flaps 2 or a guidance of the flaps 2 are provided in or on or on the support 5
  • FIG. 2b discloses details of the auxiliary shaft mounting and the connection path between the leakage space 16 and the surroundings of the valve.
  • the support 5 has two shaft journals 5a, each of which is rotatably arranged in the central housing part 1a in a passage opening 1c and there on the one hand via a first and, on the other hand, a second shaft bearing 6c or 6d are guided through the central housing part 1a into the surroundings of the valve.
  • the anti-drive shaft 3 is supported in a bore 5b in the shaft journal 5a.
  • connection path of the leakage space 16 with the surroundings of the valve is provided in the shaft journal 5a lying at the bottom in the installed position of the valve, a transverse opening 5c penetrating through the support 5 from one flap 2 to the other in the axial direction of the shaft journal 5a in a leak hole 5d continues.
  • any leakage L that may occur can be drained both in the closed (FIG. 2) and in an open position (FIG. 2c) and, if a supply of cleaning and / or rinsing liquid is provided, the leakage space 16 can also be cleaned
  • Anti-friction elements not shown, can be arranged in a central opening of the support 5
  • the shaft bearings 6c and 6d (FIG. 2b) of the shaft journals 5a can be designed according to the embodiment according to FIG. 3 (fluid-permeable longitudinal grooves 6e, the reach through the entire shaft bearing 6c or 6d)
  • the leakage L or the cleaning or stabilizing fluid reaches the surroundings of the valve via the transverse opening 5c and the leakage hole 5d.
  • the sealing surfaces between the shaft bearings 6c and 6d and the respective shaft journal 5a can be cleaned and, if necessary, set.
  • the shaft journals 5a are cleaned by cleaned and, if appropriate, stenistered sealing points sealed this area from the environment. Contamination from the environment or from non-rigid seals is thus avoided.
  • the design of the double-seat flap valve with a support 5 (FIGS. 2, 2a, 2b), in which the bearing points of the shaft journals 5a can be cleaned in the closed position of the valve, is characterized in particular by the fact that the support 5 is in the region of its Transition to the respective shaft journal 5a is provided with a concentric recess 5k extending into the latter and engaging in the support 5, in the course of the opening or closing process and in the open position, perpendicular to the axis of the shaft journal 5a and from opposite sides , each of the correspondingly shaped areas of the sealing points 2a engage fully, tightly sealing (FIG. 2b).
  • FIG. 2c The open position of the double-seat flap valve is shown in FIG. 2c.
  • the opening movement of the counter shaft 3 is identified by O and its closing movement is identified by S.
  • O The opening movement of the counter shaft 3
  • S its closing movement
  • the two flaps 2 and the support 5 form a unit which accommodates and delimits the leakage space 16.
  • FIGS. 4 and 4a show the proposed double-seat flap valve in a third embodiment.
  • a seat 9a for the flap 2 is formed on a sleeve-shaped axial slide 9, two of these axial slide 9 being arranged in the central housing part 1a and each being movable under prestress by means of a spring 10 to the axis of the pipeline and relative to the central housing part 1a are sealed.
  • the springs 10 press the axial slide 9 against one another at their mutually facing end faces by means of two leakage space-set seals 11.
  • the middle housing part 1a is penetrated by leakage openings 1e distributed over its circumference.
  • the axial slide 9 are each sealed via an axial slide seal 15 with respect to the central housing part 1a.
  • the two Axial slide 9 is compressed tightly via the two springs 10 arranged on the outside, so that the interior of the double-seat flap valve is tightly sealed from its surroundings.
  • the flaps 2 come into contact with the assigned seating surfaces 9a in the course of their displacement movement in the direction of the axis of the pipeline, they press them in the further course Sliding movement of the axial slide 9 apart (see FIG.
  • FIG. 5 shows how the proposed double-seat flap valve can be used to produce a pipe connection from pipes which intersect at a distance.
  • the housing 1 of the valve is in its shortest possible dimension a on the one hand at a first connection opening 12a of the tube 12 formed by a first connection piece 12b (recess) and on the other hand at a second connection opening 13a formed by a second connection socket 13b (also recessed part) of the tube 13 connected. It can be seen that it is possible with the new double-seat flap valve to create an almost dead space-free and extremely short connection between the beican pipes 12 and 13.
  • the middle housing part 1a is made entirely of a suitable sealing material, then in relation to the design of the flaps 2 and with regard to the implementation of the shaft journals 5a through the middle housing part 1a (omission of the seals and the precautions necessary for their inclusion) a very simple and therefore inexpensive solution. With this embodiment it can be achieved that the valve switches absolutely leak-free.
  • a sheathing of the axial slide 9 with a suitable sealing material (FIGS. 4b and 4c) likewise simplifies the double-seat flap valve in the proposed fourth embodiment.
  • Discrete flap seals 2a, axial slide seals 15 and leakage space seals 11 are no longer necessary. This is also absolutely leak-free switching possible.
  • FIG. 6 shows an embodiment of the proposed double-seat flap valve which is used when, based on the position of the valve, a shut-off valve, not shown there, is arranged in the pipeline to the right of the flap 2. If this shut-off valve is closed and there is an incompressible medium in the pipeline, the flap 2 assigned to the closed pipeline is first shifted into its end position on the seat surface 1d (closing days).
  • the displaced, incompressible medium can flow out through the second opening 18b of the compensating bore 18 and, via its first opening 18a, reaches an inner region of the middle housing part 1a behind the second flap 2, which has not yet been displaced from its central position End position (closed position) are transferred.
  • a drive 7 is to be provided which decouples the opposite, translational displacement of the two flaps 2 from one another.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

L'invention concerne une soupape à clapet à siège double avec sécurité anti-fuite, servant notamment d'élément de fermeture dans des conduites, pour séparer de manière fiable des fluides incompatibles, notamment pour l'industrie alimentaire et l'industrie des boissons. Cette soupape se définit d'après le préambule de la revendication 1 et fonctionne sans entraîner de fuite ou du moins peu. Son espace de fuite peut être nettoyé aisément, que ce soit en position ouverte ou fermée. A cet effet, pendant l'ouverture, les clapets (2) sont déplacés tout d'abord coaxialement à l'axe de la conduite, puis en sens contraire l'un par rapport à l'autre, pour sortir de leur position fermée, l'effet d'étanchéité de leurs points d'étanchéification (2a) vis-à-vis de la paroi intérieure d'une partie de boîtier (1a; 9) médiane associée, qui sont situés au niveau de leur périphérie, étant maintenu, et ce, jusqu'à ce que lesdits clapets forment une unité (2, 2; 2, 5, 2) recevant l'espace de fuite (16). Cette unité (2, 2; 2, 5, 2) est montée rotative directement ou indirectement dans la partie de boîtier (1a) par l'intermédiaire de deux pivots (5a) montés sur les faces opposées de l'unité (2, 2; 2, 5, 2) et est amenée en position d'ouverture par le biais de ce support.
EP97908217A 1996-04-13 1997-03-12 Soupape a clapet a siege double avec securite anti-fuite Withdrawn EP0891505A1 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DE19614648 1996-04-13
DE19614648 1996-04-13
DE19624969A DE19624969C1 (de) 1996-04-13 1996-06-22 Doppelsitz-Klappenventil mit Leckagesicherung
DE19624969 1996-06-22
DE19636844 1996-09-10
DE19636844 1996-09-10
DE19638931 1996-09-23
DE19638931A DE19638931C1 (de) 1996-06-22 1996-09-23 Doppelsitz-Klappenventil mit Leckagesicherung
PCT/EP1997/001240 WO1997039265A1 (fr) 1996-04-13 1997-03-12 Soupape a clapet a siege double avec securite anti-fuite

Publications (1)

Publication Number Publication Date
EP0891505A1 true EP0891505A1 (fr) 1999-01-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97908217A Withdrawn EP0891505A1 (fr) 1996-04-13 1997-03-12 Soupape a clapet a siege double avec securite anti-fuite

Country Status (3)

Country Link
EP (1) EP0891505A1 (fr)
AU (1) AU2026297A (fr)
WO (1) WO1997039265A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119816A (en) * 1935-05-09 1938-06-07 Iida Koji Butterfly valve
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AU2026297A (en) 1997-11-07

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