WO2008138496A1 - Soupape d'arrêt d'écoulement - Google Patents

Soupape d'arrêt d'écoulement Download PDF

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Publication number
WO2008138496A1
WO2008138496A1 PCT/EP2008/003536 EP2008003536W WO2008138496A1 WO 2008138496 A1 WO2008138496 A1 WO 2008138496A1 EP 2008003536 W EP2008003536 W EP 2008003536W WO 2008138496 A1 WO2008138496 A1 WO 2008138496A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
closing element
valve according
closing
abutment
Prior art date
Application number
PCT/EP2008/003536
Other languages
German (de)
English (en)
Inventor
Oliver Fassmann
Rainer Holzer
Hubert Karner
Wolfgang Ries
Berthold Schulten
Hans Steigenberger
Reinhard Svejkovski
Original Assignee
Burgmann Industries Gmbh & Co. Kg
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 Burgmann Industries Gmbh & Co. Kg filed Critical Burgmann Industries Gmbh & Co. Kg
Priority to EP08749283A priority Critical patent/EP2156078A1/fr
Publication of WO2008138496A1 publication Critical patent/WO2008138496A1/fr

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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/003—Safety valves; Equalising valves, e.g. pressure relief valves reacting to pressure and temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation

Definitions

  • the invention relates to a flow control valve for opening and closing a fluid connection between a first and a second space, in particular the barrier fluid chamber of a sealing fluid acted upon mechanical seal assembly and a space outside the barrier fluid chamber, according to the preamble of claim 1.
  • a seal fluid chamber is enclosed between a pair of mechanical seals into which a barrier fluid, usually liquid inert to the fluid being sealed, can be introduced.
  • the pressure of the barrier fluid can be adjusted to a suitably higher value than that of the medium to be sealed.
  • the system provides increased safety against leakage to the environment, and further, the barrier fluid may exert a cooling effect on the mechanical seals.
  • Such double acting mechanical seal assemblies are known; it can e.g. Burgmann, Encyclopedia of the mechanical seal, self-published, 1988, p 51, 224 are referenced. There are Sperrfluid idsysteme with and without circulation of the barrier fluid between the barrier fluid chamber and external barrier fluid supply units.
  • the invention is particularly, but not exclusively, directed to the application to non-circulating barrier fluid systems which require refilling at barrier air. id in the barrier fluid chamber primarily to compensate for losses. In this case, it relates in particular to monitoring the temperature of the barrier fluid in the barrier fluid chamber in order to initiate timely temperature-reducing countermeasures when certain temperature limit values are exceeded.
  • a fluid flow check valve having the features of claim 1.
  • This valve is able to open a barrier fluid passage passage when a certain temperature of the barrier fluid is exceeded due to its particular structural design, so that the superheated barrier fluid can flow out of the chamber to the outside and suitable measures can be taken, e.g. by introducing replacement fluid from a foreign source into the chamber so that the temperature in the chamber is returned to a value below the predetermined temperature and thus a cooling effect on the mechanical seals is still guaranteed.
  • the valve according to the invention automatically closes the passage passage and the normal operating state is resumed in the barrier fluid chamber.
  • a preferred embodiment of the invention is characterized in that the flow control valve can also exert a venting function on the equipment provided therewith.
  • the means provided for this purpose are listed in subclaim 6, to which reference can be made.
  • both the closing element and the abutment element represent molded parts made of a PEEK plastic material, which is particularly suitable because of its good mechanical and thermal properties for said components and has the advantage that an undesirable deposition of foreign particles on the moldings, eg metallic Abrasion etc. an effective resistance is opposed.
  • FIG. 1 is a perspective longitudinal sectional view of a flow check valve according to an embodiment of the invention
  • FIG. 2 is a perspective view of a closing element of the flow blocking valve according to the invention.
  • FIG. 3 in an enlarged perspective, partially sectional view of a detail of the flow check valve according to the invention.
  • the flow check valve comprises a substantially tubular housing 1 penetrated by a bore 2 providing a passage for a fluid from one axial end to the other axial end of the housing 1.
  • the bore 2 can be graduated in diameter several times.
  • the housing 1 may be stepped into a tubular neck 3 of reduced outside diameter, on which a screw thread 4 is provided, by which the valve is mounted in a wall, e.g. a barrier fluid chamber (not shown) can be mounted.
  • the bore 2 has an enlarged diameter for receiving a piston-shaped closing element 6, a biasing spring 7 and an abutment element 8.
  • the closing element 6 is shown in Fig. 2 with further details and in particular comprises a sealing region indicated at 9 and one of the biasing spring 7 facing piston guide portion 10th
  • the sealing region 9 could be formed in a different manner, in the present embodiment it comprises an O-ring sealing element which is located in a ner annular groove of the closing element 6 rests and can cooperate with an annular valve seat surface 11 which is provided on a sealing region 9 of the closing element 6 aligned region of the housing bore 2.
  • a further sealing element 12 may be provided, preferably in the form of an O-ring, which can cooperate with an intermediate, cylindrical guide portion 14 of the housing bore 2 in order to seal the Schliessele- element 6 while axially movable to lead.
  • the closing element 6 is penetrated by a pressure relief bore 15 which extends from one axial end of the closing element 6 to its opposite axial end, so that a fluid present at one end can flow to the other end of the closing element and so the position of the closing element 6 is not affected by the pressure of the fluid.
  • the pressure relief hole 15 is formed as a throttle bore to limit the flow of fluid to a suitably low Duchsatzmenge.
  • the pressure relief bore 15 may be e.g. have a diameter of 1 to 2 mm.
  • the biasing spring 7, which is preferably a conical spiral spring, is supported with its one axial end on the closing element 6 and with the other axial end on the abutment element 8.
  • the biasing spring 7 exerts on the closing element 6 and the abutment member 8 from a same biasing force.
  • the biasing force on the closing element 6 causes its sealing region 9 is held with the valve seat surface 11 of the housing bore 2 in a sealing engagement and thereby a passage of fluid along the outer periphery of the closing element 6 is prevented.
  • the closing element 6 can be moved counter to the biasing force of the biasing spring 7 under the action of an axial force in a position in which the sealing engagement is canceled.
  • an actuating element 16 which is formed so that it undergoes an axial change in length under the action of a change in temperature.
  • the actuating element may be a so-called expansion material working element, in which an encapsulated expansion substance undergoes an expansion upon a temperature increase, which manifests itself in a movement of a working piston which is in engagement with the facing end surface of the closing element 6.
  • expansion material working element in which an encapsulated expansion substance undergoes an expansion upon a temperature increase, which manifests itself in a movement of a working piston which is in engagement with the facing end surface of the closing element 6.
  • Suitable expansion elements are, for example, from the company Behr Thermot-tronik GmbH, Enzstrasse 25, D-70806 Kornwestheim to obtain and described in the company's catalog.
  • the actuator 16 is exposed in operation to the fluid in the barrier fluid chamber of a mechanical seal assembly.
  • the abutment element 8 is piston-shaped in the present embodiment and comprises a biasing spring 7 facing cylindrical portion 17 of increased diameter and a biasing spring 7 facing away from the cylindrical portion 18 of reduced diameter, wherein between the two areas a sealing region 19, preferably in the form of an O Ring sealing element is provided.
  • the sealing portion 19 may sealingly engage a further annular valve seat surface 20 on the inner periphery of the housing bore 2 to provide a sealing relationship between the abutment member 8 and the housing bore 2 under the action of the biasing spring 7.
  • the abutment member 8 is arranged axially movably in the housing bore 2 and can therefore be brought under an axial force applied thereto opposite the biasing force of the biasing spring 7 in an axial position in which the sealing relationship between the abutment member 8 and the housing bore 2 is repealed and a fluid flow along the outer periphery of the abutment member 8 is made possible.
  • a limited fluid exchange between the axial ends of the valve via the pressure relief hole 15 in Closing element 6 and the area between the closing element 6 and the abutment element 8 and take place along this.
  • the axial force causing a movement of the abutment element 8 is applied by a pin-shaped support member 21 which diametrically passes through the housing bore 2 and abuts the abutment member 8 at one of its axial ends in an elongated, preferably keyhole-like guide groove (not shown) in the peripheral wall the housing bore 2 engages and is held at the other end to a rotatably mounted on the adjacent end portion of the housing 1 coupling ring 23.
  • the guide groove is oriented so that the support element 21 assumes a different axial position with respect to the abutment element 8, depending on the position of its one end in the guide groove.
  • the support member 21 is fixed in a first position in which no axial force is exerted on the abutment member 8, or in a second position in which the abutment member 8 from the sealing relationship moved out to the housing bore 2.
  • a mounting ring 24 attached may be screwed, which may have a hexagonal outer peripheral configuration, so that a rotary tool can be applied thereto to mount the valve in a threaded bore in the wall of a barrier fluid chamber.
  • both the closing element 6 and the abutment element 8 are molded parts made of a suitable plastic material, preferably polyether ether ketone (PEEK) plastic.
  • PEEK polyether ether ketone
  • The, as mentioned above formed flow check valve works as follows: When the flow check valve in the position shown in FIG. 1 in sealing relationship between the closure member 6 and the housing bore 2 is exposed with its actuator 16 to the fluid in a barrier fluid chamber of a mechanical seal assembly, the aforementioned sealing relationship is maintained until the temperature of the fluid exceeds a certain upper limit and thereby the actuator 16 undergoes such axial expansion that the closing element 6 is moved axially against the force of the biasing spring 7 in the release position. As a result, fluid 6 can flow along the sealing area 9 of the closing element 6 and pass into an annular channel 25 in the housing 1, while it is prevented by the downstream sealing area 10 from continuing along the closing element 6. From the Rinkanal 25, the fluid passes through a connecting bore 26 between the annular channel 25 and the housing bore 2 to the outside. At least a portion of the superheated fluid may therefore be removed from the barrier fluid chamber and replaced with a fluid of suitable temperature.
  • the abutment member 8 is in sealing relation to the housing bore 2, so that a fluid exchange along the outer circumference of the abutment member 8 can not take place.
  • the abutment member 8 can be brought by rotation of the coupling ring 13 in an axial position in which the sealing engagement between the sealing portion 19 and the valve seat surface 20 is repealed and thereby the barrier fluid chamber via the pressure relief hole 15 in the closing element. 6 and the outer circumference of the abutment element 8 is brought into a fluid-exchanging connection with the housing bore 2. This may be used to introduce an exchange fluid into the barrier fluid chamber when the closure member 6 is in the closed position. In particular, a ventilation function for venting the barrier fluid chamber can thus be exercised.
  • the flow control valve according to the invention can be equipped without such a vent function, in which case the coupling ring 23 and the means for axial movement of the abutment element 8 can be omitted. It is further understood that the sealing effect of the regions 9, 10, 19 can be obtained differently than by O-ring sealing elements, for example by a conical design of the cooperating sealing surfaces. Also, the invention is not limited to the mentioned means for axial movement of the abutment member 8. Finally, the application of the flow control valve according to the invention is not limited to mechanical seal assemblies, but it can thus other equipment in which a similar temperature monitoring function is desired to be equipped.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

La présente invention concerne un soupape d'arrêt d'écoulement permettant d'ouvrir et de fermer une liaison fluidique entre un premier et un second espace, en particulier entre la chambre de fluide de retenue d'un ensemble de garniture mécanique d'étanchéité sollicité par le fluide dwe retenue et un espace situé à l'extérieur de la chambre à fluide d'arrêt d'étanchéité. La soupape comprend un boîtier (1), un passage de fluide (2) prévu dans le boîtier, un premier siège de soupape (11) situé sur le passage de fluide, et un élément de fermeture (6) disposé axialement mobile dans le passage de fluide (6), qui est précontraint par une force de précontrainte dans une première position dans une relation d'étanchéité avec le premier siège de soupape et qui peut être déplacé contre la force de précontrainte dans une seconde position, de sorte à libérer le passage de fluide. Un élément de commande (16) pouvant être exposé à l'action du fluide dans le premier espace et pouvant être amené en prise avec l'élément de fermeture (6) est configuré pour exercer, sous l'effet d'un changement de température du fluide, une force axiale sur l'élément de fermeture en direction de sa seconde position, afin de déplacer l'élément de fermeture contre la force de précontrainte dans la seconde position, en cas de dépassement d'une certaine température de fluide, l'élément de fermeture étant déchargé en pression fluidique dans la première et la seconde position.
PCT/EP2008/003536 2007-05-15 2008-04-30 Soupape d'arrêt d'écoulement WO2008138496A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08749283A EP2156078A1 (fr) 2007-05-15 2008-04-30 Soupape d'arrêt d'écoulement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202007006933.2 2007-05-15
DE200720006933 DE202007006933U1 (de) 2007-05-15 2007-05-15 Durchflusssperrventil

Publications (1)

Publication Number Publication Date
WO2008138496A1 true WO2008138496A1 (fr) 2008-11-20

Family

ID=39709062

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/003536 WO2008138496A1 (fr) 2007-05-15 2008-04-30 Soupape d'arrêt d'écoulement

Country Status (3)

Country Link
EP (1) EP2156078A1 (fr)
DE (1) DE202007006933U1 (fr)
WO (1) WO2008138496A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016091484A1 (fr) * 2014-12-11 2016-06-16 Eagleburgmann Germany Gmbh & Co. Kg Soupape d'arrêt d'écoulement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107269922B (zh) * 2017-07-28 2018-08-03 台州半城暖通科技有限公司 一种防水电热执行器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302711A1 (fr) * 2001-10-16 2003-04-16 Visteon Global Technologies, Inc. Vanne
WO2003095879A1 (fr) * 2002-05-11 2003-11-20 Rudi Nizinkiewicz Robinet de regulation de debit d'eau chaude
EP1643139A1 (fr) * 2002-10-28 2006-04-05 Poclain Hydraulics Industrie Dispositif de valve d'échange

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302711A1 (fr) * 2001-10-16 2003-04-16 Visteon Global Technologies, Inc. Vanne
WO2003095879A1 (fr) * 2002-05-11 2003-11-20 Rudi Nizinkiewicz Robinet de regulation de debit d'eau chaude
EP1643139A1 (fr) * 2002-10-28 2006-04-05 Poclain Hydraulics Industrie Dispositif de valve d'échange

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BURGMANN.: "Lexikon der Gleitringdichtung.", 1988, SELBSTVERLAG., pages: 51,224

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016091484A1 (fr) * 2014-12-11 2016-06-16 Eagleburgmann Germany Gmbh & Co. Kg Soupape d'arrêt d'écoulement
DE102014225560A1 (de) 2014-12-11 2016-06-16 Eagleburgmann Germany Gmbh & Co. Kg Durchflusssperrventil
DE102014225560B4 (de) 2014-12-11 2019-05-09 Eagleburgmann Germany Gmbh & Co. Kg Durchflusssperrventil

Also Published As

Publication number Publication date
EP2156078A1 (fr) 2010-02-24
DE202007006933U1 (de) 2008-08-21

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