EP4018467A1 - Manostat à membrane - Google Patents

Manostat à membrane

Info

Publication number
EP4018467A1
EP4018467A1 EP20771208.4A EP20771208A EP4018467A1 EP 4018467 A1 EP4018467 A1 EP 4018467A1 EP 20771208 A EP20771208 A EP 20771208A EP 4018467 A1 EP4018467 A1 EP 4018467A1
Authority
EP
European Patent Office
Prior art keywords
housing
membrane
pressure switch
microswitch
switch according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20771208.4A
Other languages
German (de)
English (en)
Other versions
EP4018467B1 (fr
Inventor
Jochen Heimann
Michael Fiala
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.)
Inelta Sensorsysteme & Co KG GmbH
Original Assignee
Inelta Sensorsysteme & Co KG GmbH
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 Inelta Sensorsysteme & Co KG GmbH filed Critical Inelta Sensorsysteme & Co KG GmbH
Publication of EP4018467A1 publication Critical patent/EP4018467A1/fr
Application granted granted Critical
Publication of EP4018467B1 publication Critical patent/EP4018467B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H01H35/2628—Means for adjustment of "ON" or "OFF" operating pressure by varying the relative position of switch-casing and pressure sensitive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm

Definitions

  • the invention relates to a membrane pressure switch according to the preamble of claim 1.
  • Such a membrane pressure switch is known from DE 201 06 436 U 1.
  • This pressure switch comprises an insulating housing which is provided on the front side with at least two essentially axially parallel, radially elastic anchor tongues with gripper hooks which engage behind a front-side annular surface turned on a hexagon key.
  • a membrane pressure switch which is provided with a housing in which a deformable membrane is arranged. Furthermore, a pressure mushroom is provided in the housing, which is guided displaceably by deformation of the membrane and for this purpose rests against the membrane. If pressure is exerted on the membrane, for example by a pressurized fluid, the membrane is deformed and presses on the pressure mushroom so that it can be moved from a rest position to a switching position along the longitudinal axis of the housing.
  • the push button actuates a switching mechanism of a microswitch which is arranged opposite the push button by means of a fixing disk in the housing.
  • the fixing disc is provided with an external thread which is screwed into an internal thread of the housing when the fixing disc is in the assembled state.
  • Fig. 2 is a sectional view of the membrane pressure switch along the line A-A in Fig.
  • FIG. 3 shows a sectional illustration of the membrane pressure switch according to FIG. 1 along the line B-B in FIG. 1, and
  • FIG. 4 shows a perspective illustration of the membrane pressure switch according to the invention.
  • FIG. 1 shows an end view of a diaphragm pressure switch 1 according to the invention and illustrates the section lines A-A and B-B, from which the sectional views of FIGS. 2 and 3 result.
  • the membrane pressure switch 1 has a housing 2 in which a membrane 3 is arranged, which can be fixed in the housing 2 by means of a washer 9 placed on the membrane 3.
  • the membrane 3 is deformable, for example by a fluid introduced into a pressure chamber 23, for which the fitting disk 9 has a preferably central recess 10.
  • a pressure mushroom 4 is also arranged in the housing 2, which has a contact washer 4A and a plunger 4B fastened to the contact washer 4A.
  • the push button 4 rests with its contact disk 4A on the membrane 3 and can move along a displacement path, which is indicated by the double arrow VW in Fig. 2, in the direction of an actuating element 22 of a microswitch 5, which is opposite the push button with the help of a Fixing disk 6 is arranged and fixed in housing 2.
  • the fixing disc 6 is provided with an external thread 7 which can interact with an internal thread 8 of the housing 2, so that the fixing disc 6 and the microswitch 5 arranged on it are screwed into the housing 2 in the assembled state.
  • the microswitch 5 is preferably glued to the fixing disk 6 in a sealing manner.
  • an end stop 11 for the push button 4 is provided in the housing 2, which limits the displacement path VW in that the contact disk 4A rests on the stop 11 in the end position.
  • the microswitch 5 is connected to a circuit board 12, which is also arranged in the housing 2.
  • FIG. 2 finally shows that a tube 17 on the side of the microswitch 5 is plugged onto a free end region 18 of the housing 2, with one connection cable 21 being soldered onto the circuit board 12 and two into the tube 17 in the final assembly state shown in FIG Potting compounds 19 and 20 are filled.
  • the potting compound 19 is a viscous plastic compound, so that it can be prevented that this potting compound 19 can penetrate the threads 7 and 8 that are screwed together.
  • the second potting compound 20 is a plastic compound suitable for UL certification.
  • a counter screw 13 is also screwed through the plate 12 into an internal thread 14 of the fixing disk 6.
  • the counter screw 13 is supported with its front face 15 on a bottom surface 16 of the housing 2. This results in a tilting of the external thread 7 with respect to the internal thread 8, which defines the position of the fixing disk 6 and thus of the microswitch 5 in the housing 2.
  • the present invention also relates to a method for setting a switching point of a membrane pressure switch.
  • This procedure comprises the following procedural steps:
  • the fixing disk 6 with the microswitch 5 fixed on it is screwed into the housing 2 until the microswitch 5 is switched by the push button 4.
  • This circuit of the microswitch 5 can preferably be displayed on a suitable assembly tool.
  • the counter screw 13 is screwed through the board 12 into the internal thread 14 of the fixing screw 6 until the end face 15 is on the Base surface 16 of the housing 2 is supported.
  • the internal thread 8 of the housing 6 is tilted relative to the external thread 7 of the fixing disc 6, which fixes the fixing disc 6 and thus fixes the switching point of the microswitch.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

L'invention concerne un manostat à membrane (1) comportant un boîtier (2) dans lequel est disposée une membrane déformable (3) contre laquelle s'appuie une plaque d'appui (4) qui peut être déplacée par la déformation de la membrane (3) ; et ayant microrupteur (5) qui est disposé en vis-à-vis de la plaque d'appui (4) dans le boîtier (2) au moyen d'une plaque de fixation (6), la plaque de fixation (6) comportant un filetage externe (7) qui, lorsque la plaque de fixation (6) est dans son état monté, est vissée dans un filetage interne (8) du boîtier (2).
EP20771208.4A 2019-08-23 2020-08-20 Manostat à membrane Active EP4018467B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019212681.2A DE102019212681B4 (de) 2019-08-23 2019-08-23 Membrandruckschalter und Verfahren zur Einstellung eines Schaltpunktes eines Membrandruckschalters
PCT/EP2020/073328 WO2021037665A1 (fr) 2019-08-23 2020-08-20 Manostat à membrane

Publications (2)

Publication Number Publication Date
EP4018467A1 true EP4018467A1 (fr) 2022-06-29
EP4018467B1 EP4018467B1 (fr) 2024-07-03

Family

ID=72470319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20771208.4A Active EP4018467B1 (fr) 2019-08-23 2020-08-20 Manostat à membrane

Country Status (4)

Country Link
US (1) US11823853B2 (fr)
EP (1) EP4018467B1 (fr)
DE (1) DE102019212681B4 (fr)
WO (1) WO2021037665A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148623B (de) * 1957-07-05 1963-05-16 Pleuger & Co In Anhaengigkeit eines Fluessigkeitsstandes schaltender Tauchschalter zum Steuern von elektromotorisch angetriebenen Pumpen
DE1829072U (de) * 1961-02-11 1961-04-06 Vdo Schindling Membrandruckschalter.
GB1278778A (en) 1968-08-19 1972-06-21 Simplifix Couplings Ltd Improvements in pressure actuated switches
DE3026532A1 (de) * 1980-07-12 1982-02-18 Robert Bosch Gmbh, 7000 Stuttgart Druckschalter
US4616114A (en) * 1984-11-19 1986-10-07 Texas Instruments Incorporated Pressure responsive switch having little or no differential between actuation release pressure levels
US4827095A (en) * 1988-04-12 1989-05-02 Dwyer Instruments, Inc. Differential pressure switch assembly with high static pressure use characteristics
US4900883A (en) * 1988-06-14 1990-02-13 Whitman Controls Corporation Fluid-operated compound switch
IT1252296B (it) * 1991-11-15 1995-06-08 Ma Ter Srl Pressostato a sfioro, con microinterruttore di sicurezza a riarmo manuale
DE19701584C2 (de) * 1997-01-17 2000-02-03 Manfred Heckner Schalter, insbesondere Sicherheitsschalter
DE20106436U1 (de) * 2001-04-12 2001-06-28 Quitoschinger, Willi, 72175 Dornhan Druckschalter mit Anschlußstecker
WO2005100792A1 (fr) * 2004-04-14 2005-10-27 Gilberto Tadeu Pires De Paula Controleur de pression et de flux de pompe
US7112753B1 (en) * 2005-08-29 2006-09-26 Paul-Chia Lee Pressure switch
US8653387B2 (en) * 2010-07-07 2014-02-18 Ashcroft, Inc. Rotary adjustment for dual switch assembly
US10510504B2 (en) * 2017-12-08 2019-12-17 Eagle Technology, Llc Force amplified low pressure depth activated switch

Also Published As

Publication number Publication date
DE102019212681B4 (de) 2021-03-25
WO2021037665A1 (fr) 2021-03-04
US11823853B2 (en) 2023-11-21
US20220285112A1 (en) 2022-09-08
EP4018467B1 (fr) 2024-07-03
DE102019212681A1 (de) 2021-02-25

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