DE102012221270A1 - High pressure seal arrangement for process measurement between process terminal and cylindrical proximity switch in food industry, has housing with groove for accommodating O-ring and supporting ring having different elasticity - Google Patents
High pressure seal arrangement for process measurement between process terminal and cylindrical proximity switch in food industry, has housing with groove for accommodating O-ring and supporting ring having different elasticity Download PDFInfo
- Publication number
- DE102012221270A1 DE102012221270A1 DE201210221270 DE102012221270A DE102012221270A1 DE 102012221270 A1 DE102012221270 A1 DE 102012221270A1 DE 201210221270 DE201210221270 DE 201210221270 DE 102012221270 A DE102012221270 A DE 102012221270A DE 102012221270 A1 DE102012221270 A1 DE 102012221270A1
- Authority
- DE
- Germany
- Prior art keywords
- ring
- groove
- proximity switch
- housing
- pressure seal
- 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
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/95—Proximity switches using a magnetic detector
- H03K17/9505—Constructional details
Landscapes
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Actuator (AREA)
Abstract
Description
Die Erfindung betrifft eine Hochdruckdichtung für die Prozessmesstechnik mit einem zylindrischen, vorzugsweise induktiven oder magnetischen Näherungsschalter und einem Prozessanschluss nach dem Oberbegriff des Patentanspruchs 1, sowie einen zylindrischen Näherungsschalter für Hochdruckanwendungen nach Anspruch 2. The invention relates to a high-pressure seal for process measuring technology with a cylindrical, preferably inductive or magnetic proximity switch and a process connection according to the preamble of
Induktive und magnetische Näherungsschalter sind in der Automatisierungstechnik und auch in der Prozessmesstechnik weit verbreitet. In der Lebensmittelindustrie müssen sie häufigen Hochdruckreinigungsprozeduren standhalten. Beim Einsatz in hydraulischen Stellgliedern, z. B. bei der Abfrage von Kolbenpositionen, wirken bis zu 500 bar dynamisch auf die aktive Fläche. Inductive and magnetic proximity switches are widely used in automation technology and also in process measurement technology. In the food industry, they must withstand frequent high pressure cleaning procedures. When used in hydraulic actuators, eg. As in the query of piston positions, up to 500 bar act dynamically on the active surface.
Die Druckfestigkeit wird durch ein Ganzmetallgehäuse, vorzugsweise komplett aus Edelstahl, oder mit einer Stirnfläche aus Keramik erreicht, die in das Metallgehäuse eingerollt wird. Die Abdichtung erfolgt in den meisten Fällen mit einem O-Ring, für den eine Nut in das Gehäuse eingearbeitet ist. The compressive strength is achieved by an all-metal housing, preferably made entirely of stainless steel, or with a face made of ceramic, which is rolled into the metal housing. The seal is made in most cases with an O-ring, for which a groove is incorporated in the housing.
Bei einem O-Ring mit ca. 2 mm Schnurstärke und einem Gehäusedurchmesser des Näherungsschalters von 10 mm reduziert sich der Durchmesser im Nutgrund auf ca. 6 mm. Die Nutbreite beträgt typischerweise 3,6 mm, weil wegen des hohen Druckes neben dem O-Ring auch noch ein Stützring erforderlich ist. With an O-ring with approx. 2 mm cord thickness and a housing diameter of the proximity switch of 10 mm, the diameter in the groove base is reduced to approx. 6 mm. The groove width is typically 3.6 mm, because because of the high pressure in addition to the O-ring also a support ring is required.
Der Nachteil des Standes der Technik besteht also darin, dass der verbleibende Gehäusedurchmesser unterhalb der Nut nur noch wenig Raum für elektronische Bauelemente lässt. Außerdem begrenzt diese Engstelle den Durchmesser einer Sensorspule oder eines Schalenkerns, die bei der Fertigung diese Stelle passieren müssen. The disadvantage of the prior art is therefore that the remaining housing diameter below the groove leaves little room for electronic components. In addition, this bottleneck limits the diameter of a sensor coil or a shell core, which must pass through this point during production.
Die
Nachteilig sind der hohe Materialeinsatz durch die 4 Dichtungselemente, und die große Schnurstärke des Quetschringes, die den nutzbaren Innenrohrdurchmesser begrenzt, wie bereits oben ausgeführt wurde. Disadvantages are the high use of material by the 4 sealing elements, and the large line thickness of the squeezing ring, which limits the usable inner tube diameter, as already stated above.
Die Aufgabe der Erfindung besteht darin, die Nachteile des Standes der Technik zu überwinden, insbesondere die Schnurstärke des O-Rings (Quetschring), bei gleicher Dichtwirkung zu reduzieren, sowie den Materialeinsatz zu senken. The object of the invention is to overcome the disadvantages of the prior art, in particular to reduce the cord thickness of the O-ring (squeezing ring), with the same sealing effect, as well as to reduce the use of materials.
Diese Aufgabe wird durch die im Patentanspruch 1 angegebenen Merkmale gelöst. In den Unteransprüchen sind vorteilhafte Ausgestaltungen der Erfindung angegeben. This object is achieved by the features specified in
Der wesentliche Erfindungsgedanke besteht darin, die Nut für das Dichtmedium zur druckabgewandten Seite hin anzuschrägen und den dadurch entstehenden Raum zwischen dem Innen- und dem Außenrohr mit einem vorzugsweise keilförmigen Stützring auszufüllen, der auf der Schräge des Gehäuses gleitet und den O-Ring in die für die Dichtung erforderliche Position presst. So kann die Schnurstärke des O-Ringes reduziert und der nutzbare Innendurchmesser entsprechend größer werden. Das ist bei einem induktiven Näherungsschalter im Ganzmetallgehäuse besonders vorteilhaft, weil die oben erwähnte Engstelle bei der Montage der Sensorspule, bzw. des Schalenkerns verbreitert wird. Auf diese Weise können die Empfindlichkeit und die Störsicherheit durch den Einsatz einer größeren Sensorspule verbessert werden. The essential idea of the invention is to slant the groove for the sealing medium to the side facing away from the pressure and to fill the resulting space between the inner and outer tube with a preferably wedge-shaped support ring which slides on the slope of the housing and the O-ring in the for the seal presses required position. Thus, the cord thickness of the O-ring can be reduced and the usable inner diameter can be correspondingly larger. This is particularly advantageous in the case of an inductive proximity switch in the all-metal housing, because the bottleneck mentioned above is widened during the assembly of the sensor coil or of the shell core. In this way, the sensitivity and interference immunity can be improved by using a larger sensor coil.
Die Erfindung wird anhand der Zeichnung näher erläutert. The invention will be explained in more detail with reference to the drawing.
Die
Die Nut
Zur Erleichterung der Montage des Stützrings
Die
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1 1
- Gehäuse des Näherungsschalters Housing of the proximity switch
- 2 2
- Prozessanschluss process connection
- 3 3
- Nut groove
- 4 4
- O-Ring (Quetschring) O-ring (squeezing ring)
- 5 5
- keilförmiger Stützring wedge-shaped support ring
- 6 6
- Schräge slope
- 7 7
- Rampe (Montagehilfe) Ramp (mounting aid)
- 8 8th
- Druckmedium (Wasser, Hydrauliköl, Luft, etc.) Pressure medium (water, hydraulic oil, air, etc.)
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102004061159 A1 [0006] DE 102004061159 A1 [0006]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210221270 DE102012221270A1 (en) | 2012-11-21 | 2012-11-21 | High pressure seal arrangement for process measurement between process terminal and cylindrical proximity switch in food industry, has housing with groove for accommodating O-ring and supporting ring having different elasticity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210221270 DE102012221270A1 (en) | 2012-11-21 | 2012-11-21 | High pressure seal arrangement for process measurement between process terminal and cylindrical proximity switch in food industry, has housing with groove for accommodating O-ring and supporting ring having different elasticity |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012221270A1 true DE102012221270A1 (en) | 2014-05-22 |
Family
ID=50625622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210221270 Ceased DE102012221270A1 (en) | 2012-11-21 | 2012-11-21 | High pressure seal arrangement for process measurement between process terminal and cylindrical proximity switch in food industry, has housing with groove for accommodating O-ring and supporting ring having different elasticity |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102012221270A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202015100786U1 (en) | 2015-02-19 | 2016-05-20 | Sick Ag | Sensor with a housing and a mounting piece |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4328366A1 (en) * | 1993-08-24 | 1995-03-02 | Ifm Electronic Gmbh | Electronic switching device which preferably operates without making contact |
DE102004050584A1 (en) * | 2004-10-15 | 2006-04-27 | Gapi Technische Produkte Gmbh | Sealing arrangement with support ring and support ring |
DE102004061159A1 (en) | 2004-12-16 | 2006-07-13 | Schmidkowski, Jürgen | Screw joint with a threaded sleeve for connecting fluid pipes to one another or to a fitting incorporates a sealing ring of an elastic material and additionally clamping and glide rings |
-
2012
- 2012-11-21 DE DE201210221270 patent/DE102012221270A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4328366A1 (en) * | 1993-08-24 | 1995-03-02 | Ifm Electronic Gmbh | Electronic switching device which preferably operates without making contact |
DE102004050584A1 (en) * | 2004-10-15 | 2006-04-27 | Gapi Technische Produkte Gmbh | Sealing arrangement with support ring and support ring |
DE102004061159A1 (en) | 2004-12-16 | 2006-07-13 | Schmidkowski, Jürgen | Screw joint with a threaded sleeve for connecting fluid pipes to one another or to a fitting incorporates a sealing ring of an elastic material and additionally clamping and glide rings |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202015100786U1 (en) | 2015-02-19 | 2016-05-20 | Sick Ag | Sensor with a housing and a mounting piece |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: F16L0019060000 Ipc: F16L0041000000 |
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R163 | Identified publications notified | ||
R012 | Request for examination validly filed | ||
R084 | Declaration of willingness to licence | ||
R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |