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WO2004083694A1 - Robinets a membranes et membranes associees - Google Patents

Robinets a membranes et membranes associees Download PDF

Info

Publication number
WO2004083694A1
WO2004083694A1 PCT/GB2004/001175 GB2004001175W WO2004083694A1 WO 2004083694 A1 WO2004083694 A1 WO 2004083694A1 GB 2004001175 W GB2004001175 W GB 2004001175W WO 2004083694 A1 WO2004083694 A1 WO 2004083694A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
reinforcing element
region
valve according
valve
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.)
Ceased
Application number
PCT/GB2004/001175
Other languages
English (en)
Inventor
Vicki Jane Johansen
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.)
Crane Process Flow Technologies Ltd
Original Assignee
Crane Process Flow Technologies Ltd
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 Crane Process Flow Technologies Ltd filed Critical Crane Process Flow Technologies Ltd
Publication of WO2004083694A1 publication Critical patent/WO2004083694A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
    • F16K7/16—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being mechanically actuated, e.g. by screw-spindle or cam

Definitions

  • This invention relates to a diaphragm valve, and to a diaphragm for a diaphragm valve.
  • a diaphragm valve is a type of valve which includes a valve body which defines an inlet port, an outlet port, and a diaphragm opening.
  • a diaphragm is secured to the diaphragm opening in a fluid-tight manner to define with the valve body a flow passage which extends from the inlet port to the outlet port.
  • An operating mechanism is provided for controlling the configuration of the diaphragm. In one extreme configuration of the diaphragm the diaphragm is pressed into engagement with a weir defined on the valve body to close the passage to fluid flow. In the opposite extreme position of the diaphragm, the diaphragm is at a maximum spacing from the weir to open the valve fully to fluid flow. In intermediate configurations a limited space is defined between the weir and the opposing surface of the diaphragm to control the flow area of the flow passage.
  • Diaphragm valves are a common industrial product and are available from many sources.
  • the materials of the valve body and of the diaphragm are chosen in light of the line media to be controlled.
  • the known characteristics of isoprene isobutylene rubber also known as HR or butyl rubber
  • HR butyl rubber
  • Butyl rubber is a highly saturated hydrocarbon and the polymer chain structure results in physical properties which are well known for good vibration and shock damping characteristics.
  • the present invention makes it practicable to utilize butyl rubber as a construction material for the diaphragm of a diaphragm valve. It is to be noted, however, that the present invention may be applied to a wide range of materials and is not limited to diaphragms constructed exclusively or even partly from butyl rubber.
  • a diaphragm valve comprises: a valve body which defines an inlet port, an outlet port, and a diaphragm opening; a diaphragm secured to the diaphragm opening in a fluid-tight manner to define with the valve body a flow passage which extends from the inlet port to the outlet port; an operating mechanism for controlling the configuration of the diaphragm between a first extreme configuration in which the diaphragm is pressed into engagement with a weir defined on the valve body to close the passage to fluid flow and a second extreme configuration in which the diaphragm is at a maximum spacing from the weir to open the valve fully to fluid flow; wherein the diaphragm incorporates a substantially rigid reinforcing element extending around substantially the entire periphery of the diaphragm, the reinforcing element being substantially completely encapsulated within the material of the diaphragm for resisting compression setting of the material of the diaphragm.
  • the reinforcing element includes a first region which extends to a location adjacent one major surface of the diaphragm and a second region which extends to a location adjacently the opposite major surface of the diaphragm, the first and second regions being radially offset from each other.
  • the first region is adjacent the outer surface of the diaphragm and the second region is adjacent the inner surface of the diaphragm, the second region being located radially outwardly of the first region.
  • the first and second regions are interconnected by a portion of the reinforcing element which extends substantially parallel to the first and second major surfaces of the diaphragm.
  • one of the first and second regions is located immediately adjacent the radial extremity of the diaphragm and the second region is located adjacent a sealing bead provided on the diaphragm spaced radially inwardly from the radially outer extremity of the diaphragm.
  • the reinforcing element comprises a substantially horizontal central region, a first leg extending upwardly from one extremity of the horizontal region, and a second leg extending downwardly from the opposite extremity of the horizontal region.
  • Such a reinforcing element can readily be formed from suitable perforated material by a stamping process.
  • the reinforcing element is in the form of a perforated plate to enhance the mechanical connection between the material of the plate and the material of the diaphragm.
  • the diaphragm is a perforated steel plate.
  • the reinforcing element at least partially surrounds any holes provided in the diaphragm for the passage of releasable fastenings used to secure the operating mechanism flange to the body flange of the valve.
  • Figure 1 is a partly broken away side view of an embodiment diaphragm in accordance with the present invention.
  • Figure 2 is a schematic isometric view showing a portion of a diaphragm in accordance with the present invention
  • Figure 3 is a bottom plan view of the diaphragm of Figures 1 and 2;
  • Figure 4 is a side view of the reinforcing element of the diaphragm of Figures 1-3;
  • Figure 5 is an isometric view of the reinforcing element of Figure 4.
  • Figure 6 is a cross-sectional view of a peripheral region of the diaphragm of Figures 1-3.
  • the drawings illustrate a diaphragm 1 for use in a diaphragm valve.
  • the diaphragm 1 will be secured to a valve body by compressing the peripheral zone 2 of the diaphragm between a flange provided on the valve body (which engages the underside 3 of the diaphragm) and a flange provided on an operating mechanism, for example a bonnet assembly, which engages the upper surface 4 of the peripheral region 2.
  • the respective flanges are secured together using appropriate fastenings, typically releasable fastenings.
  • the releasable fastenings may, for example, be in the form of screws which engage threaded openings in the body flange.
  • a boss 5 is provided in the central region of the diaphragm for connection to the operating mechanism.
  • the diaphragm 1 includes a relatively flexible inner region 6 and a relatively rigid outer peripheral region 7.
  • the region 6 is typically formed of a suitable rubber compound, for example butyl rubber and may be provided with reinforcing material, for example layers of woven or non- woven fabric.
  • the outer peripheral region incorporates a reinforcing element 8 which is substantially completely moulded into the material of the diaphragm so that it is not visible from the exterior of the diaphragm.
  • Reinforcing material provided in the inner region 6 may extend to overlap the reinforcing element 8 or may stop short of the reinforcing element 8 so that a narrow un-reinforced area of the diapliragm exists between the flexible reinforcing material and the substantially rigid reinforcing element 8.
  • the reinforcing element 8 is shown in greater detail in Figures 4 and 5. It is in the form of a perforated plate 9 of suitable material, for example steel. As viewed in the drawings, the reinforcing element includes a substantially horizontal central region 10 which, as illustrated in Figure 6, extends substantially parallel to the adjacent upper surface 11 and lower surface 12 of the diaphragm. At the radially inner end of the surface 10 a first leg 13 extends upwardly to terminate in a region 14 located adjacent the upper surface 11 of the diaphragm. At the radially outer extremity of the surface 10 a second leg 15 extends downwardly to a region 16 located adjacent the lower surface 12 of the diaphragm.
  • the lower surface 12 of the diaphragm incorporates a raised sealing bead 17 which has a radial location substantially corresponding to the radial location of the first leg 13 of the reinforcing element.
  • the reinforcing element has cut-out regions 18 which correspond to through holes 19 provided in the diaphragm for the passage of bolts or screws.
  • a reinforcing element in accordance with the present invention substantially enhances the mechanical properties of the peripheral region of the diaphragm.
  • the peripheral region is considerably stiffened by the presence of the reinforcing element and compression set is reduced to such an extent that diaphragm materials for general engineering applications, for example butyl rubber, may now be utilized without the need for periodical re- tightening of the diaphragm fixing element under certain conditions.
  • the reinforcing element is completely encapsulated within the material of the diaphragm. Whilst this arrangement is preferred there may be applications in which the outer radial surface 20 of the reinforcing element may be exposed to show the presence of the reinforcing element.
  • the reinforcing element preferably has a tab 21 which is over-moulded with the material of the diaphragm to provide a radial projection 22 which can carry information such as the material of the diaphragm and the fact that the diaphragm is reinforced.
  • the stiffening of the projection 22 provided by the tab 21 will of itself provide a physical indication that the diaphragm periphery is reinforced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

L'invention concerne une membrane (1) pour robinet à membrane comprenant une zone périphérique (2) qui, en cours d'utilisation, est compressée entre un bord situé sur un corps de robinet et un bord situé sur un mécanisme d'actionnement. La membrane (1) comprend une zone intérieure relativement souple (6) et une zone périphérique extérieure relativement rigide (7). La zone périphérique extérieure comprend un élément de renforcement (8) entièrement moulé dans le matériau de la membrane de sorte à être invisible depuis l'extérieur de la membrane. L'élément de renforcement (8) peut se présenter sous la forme d'une plaque perforée (9) d'un métal approprié. Cet élément de renforcement permet de réduire la déformation rémanente après compression de la périphérie de la membrane, de façon d'un matériau relativement compressible, tel que le caoutchouc butylique, puisse être utilisé sans qu'il soit nécessaire de resserrer périodiquement les éléments de fixation de membrane.
PCT/GB2004/001175 2003-03-19 2004-03-19 Robinets a membranes et membranes associees Ceased WO2004083694A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0306302.1 2003-03-19
GB0306302A GB2399616A (en) 2003-03-19 2003-03-19 Diaphragm valves and diaphragms therefor

Publications (1)

Publication Number Publication Date
WO2004083694A1 true WO2004083694A1 (fr) 2004-09-30

Family

ID=9955084

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001175 Ceased WO2004083694A1 (fr) 2003-03-19 2004-03-19 Robinets a membranes et membranes associees

Country Status (2)

Country Link
GB (1) GB2399616A (fr)
WO (1) WO2004083694A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005001250U1 (de) * 2005-01-26 2006-06-08 GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG Membrane für Membranventil
DE102005021583A1 (de) 2005-05-10 2006-11-30 Bürkert Werke GmbH & Co. KG Ventilvorrichtung
WO2011049705A1 (fr) * 2009-10-19 2011-04-28 Parker-Hannifin Corporation Ensemble d'étanchéité
DE102016101782A1 (de) * 2016-02-02 2017-08-03 Gemü Gebr. Müller Apparatebau Gmbh & Co. Kommanditgesellschaft Elastomer-Membranelement
DE102017128996A1 (de) * 2017-12-06 2019-06-06 Gemü Gebr. Müller Apparatebau Gmbh & Co. Kommanditgesellschaft Membran für ein Membranventil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154286A (en) * 1960-11-03 1964-10-27 Hills Mccanna Co Weir valve
GB1118259A (en) * 1965-10-04 1968-06-26 Harzer Achsenwerke K G Schwema A cone-diaphragm valve
DE4323856A1 (de) * 1992-07-24 1994-01-27 Huber+Suhner Ag Faserverstärkte Membran

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250081A (en) * 1990-11-23 1992-05-27 Saunders Valve Co Ltd Diaphragm valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154286A (en) * 1960-11-03 1964-10-27 Hills Mccanna Co Weir valve
GB1118259A (en) * 1965-10-04 1968-06-26 Harzer Achsenwerke K G Schwema A cone-diaphragm valve
DE4323856A1 (de) * 1992-07-24 1994-01-27 Huber+Suhner Ag Faserverstärkte Membran

Also Published As

Publication number Publication date
GB0306302D0 (en) 2003-04-23
GB2399616A (en) 2004-09-22

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