EP1116247A1 - Valve magnet - Google Patents

Valve magnet

Info

Publication number
EP1116247A1
EP1116247A1 EP99953536A EP99953536A EP1116247A1 EP 1116247 A1 EP1116247 A1 EP 1116247A1 EP 99953536 A EP99953536 A EP 99953536A EP 99953536 A EP99953536 A EP 99953536A EP 1116247 A1 EP1116247 A1 EP 1116247A1
Authority
EP
European Patent Office
Prior art keywords
coil
encapsulation
housing
explosion
prevents
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
EP99953536A
Other languages
German (de)
French (fr)
Other versions
EP1116247B1 (en
Inventor
Dieter Maisch
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.)
IMI VENTILTECHNIK BETEILIGUNGS-GMBH
Norgren GmbH
Original Assignee
IMI Norgren Herion Fluidtronic GmbH and 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 IMI Norgren Herion Fluidtronic GmbH and Co KG filed Critical IMI Norgren Herion Fluidtronic GmbH and Co KG
Publication of EP1116247A1 publication Critical patent/EP1116247A1/en
Application granted granted Critical
Publication of EP1116247B1 publication Critical patent/EP1116247B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets

Definitions

  • the invention relates to a valve magnet, comprising a coil and an iron circuit, which are arranged in a housing that can be used in potentially explosive areas.
  • Valve magnets of this type have been known for some time and can be seen, for example, from German utility model 90 03 343 or from US Pat. No. 5,138,292.
  • Types of protection according to IEC or EN are: “Flameproof encapsulation (EExd)”, “Increased safety (EExe)”, “Overpressure encapsulation (EExp)”, “Intrinsically safety (EExi) “,” oil encapsulation (EExo) “,” sand encapsulation (EExq) “and” encapsulation (EExm) ".
  • Construction methods for explosion-proof magnets are also known, in which not only the “pure” types of protection mentioned above are used, but also combinations of these types of protection, such as, for example, the types of protection “potting encapsulation” combined with “increased safety” or “pressure-resistant encapsulation” with “increased security”.
  • the object of the invention is to develop an explosion-proof valve magnet of the generic type in such a way that it can be produced easily and inexpensively in the connection area of external lines if the type of protection "flameproof encapsulation" is fulfilled.
  • valve magnet of the type described at the outset in that the coil and the iron circuit are embedded in a casting compound which is introduced into a housing part and which prevents the access of an explosive atmosphere to live parts and at the same time serves for fixing and electrical insulation (encapsulation encapsulation ) and that connection elements of the coil are arranged in a housing part which withstands an internal pressure in the event of an explosion and prevents transmission of the explosion to the environment (pressure-resistant encapsulation).
  • the great advantage of dividing the housing into two housing parts, one of which fulfills the type of protection "encapsulation” derenid the other of the type of protection "flameproof encapsulation” has the great advantage that the coil and the iron circuit, especially the magnetic sleeve is not part of the pressure-resistant space .
  • This part of the housing can thus do without the complex fits that are required for flameproof enclosures because of the flame-proof gap. By avoiding such gaps, which must have a prescribed minimum length, the size of the magnet can also be reduced.
  • valve magnet In addition to its simple manufacture, it is also advantageous with such a valve magnet that encapsulated coils and iron circles or magnetic connection sleeves are available as standard parts, which results in a smaller inventory. Nevertheless, the external lines can be connected in a pressure-tightly encapsulated space arranged in the second housing part.
  • Fig. 1 shows a valve magnet according to the invention in an exploded view
  • Fig. 2 a sectional view of the valve magnet according to the invention shown in Fig. 1.
  • a valve magnet shown in FIGS. 1 and 2, comprises a housing 10 which is divided into two housing parts 11, 12.
  • a coil 30 and an iron circuit 31 are embedded in a casting compound 20 in the housing part 12 which fulfills the type of protection “encapsulation, EExm”.
  • the coil has a through opening 32 for receiving an armature, through which, in a manner known per se, a valve in a Electrical connection elements 41 are also embedded in the potting compound 20, which protrude beyond the potting compound 20 that closes the end of the housing part 12.
  • the potting compound 20 serves to keep an explosive atmosphere away as well as for fixing and electrical insulation.
  • connection elements 41 for connecting electrical lines for actuating the coil 30 are arranged in the other housing part 11, which fulfills the “flameproof enclosure” type of protection. External lines are introduced into the interior of the flameproof housing part 11 via an opening 14.
  • the housing part 11 is closed at the end by a cover 17 which engages with a projection 17a formed on it in an end opening 18 of the housing such that the projection 17a over a predetermined length with the opening 18 complementary to the projection 17a to form a ignition-proof gap overlaps between the projection 17a and the opening 18.
  • a seal 60 can be provided, which is arranged between the cover 17 and the housing 10 in the assembled state.
  • the housing part 11 is designed in such a way that, in the event of an explosion of an explosive mixture, it can withstand a pressure prescribed by standard regulations and a transmission of the explosion to the surroundings of the housing 10 is prevented.
  • valve magnet described above is that the encapsulation encapsulation of the housing part 12 and thus an explosion-proof valve magnet, which fulfills the combined type of protection EExmd (encapsulation encapsulation and flameproof encapsulation), is simple and therefore inexpensive to produce.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electromagnets (AREA)
  • Valve Housings (AREA)

Abstract

A valve magnet comprising a coil and an iron core that are arranged in a housing which can be used in a potentially explosive environment. The invention is characterized in that the coil and core are embedded in a sealing compound that is introduced into one part of the housing, whereby said compound prevents an explosive atmosphere from coming into contact with live parts and is also used for fixing and electrical insulation purposes (encapsulation). The connecting elements of the coil are arranged in a part of the housing that is pressure-resistant in the case of an explosion and which prevents the explosion from being passed onto the surrounding area (pressure-proof encapsulation).

Description

' .» '. »
VentilmagnetValve solenoid
Die Erfindung betrifft einen Ventilmagneten, umfassend eine Spule und einen Eisenkreis, die in einem in explo- sionsgefährdeten Bereichen einsetzbaren Gehäuse angeordnet sind.The invention relates to a valve magnet, comprising a coil and an iron circuit, which are arranged in a housing that can be used in potentially explosive areas.
Derartige Ventilmagneten sind seit längerem bekannt und gehen beispielsweise aus dem deutschen Gebrauchsmuster 90 03 343 oder aus der US-Patentschrift 5,138,292 hervor.Valve magnets of this type have been known for some time and can be seen, for example, from German utility model 90 03 343 or from US Pat. No. 5,138,292.
Es sind die unterschiedlichsten Zündschutzarten bekannt. Zündschutzarten nach IEC bzw. EN (EN 50014 ff) sind: „Druckfeste Kapselung (EExd)", „Erhöhte Sicherheit (EExe)", „Überdruckkapselung (EExp)", „Eigensi- cherheit (EExi)", „Ölkapselung (EExo)", „Sandkapselung (EExq)" und „Vergußkapselung (EExm)".The most varied types of protection are known. Types of protection according to IEC or EN (EN 50014 ff) are: "Flameproof encapsulation (EExd)", "Increased safety (EExe)", "Overpressure encapsulation (EExp)", "Intrinsically safety (EExi) "," oil encapsulation (EExo) "," sand encapsulation (EExq) "and" encapsulation (EExm) ".
Es sin ferner Bauweisen für explosionsgeschützte Magnete bekannt, bei denen nicht nur die oben genannten „reinen" Zündschutzarten zur Anwendung kommen, sondern auch Kombinationen dieser Zündschutzarten, wie zum Beispiel die Zündschutzarten „Vergußkapselung" kombiniert mit „Erhöhte Sicherheit" oder „Druckfeste Kapselung" kombiniert mit „Erhöhte Sicherheit" .Construction methods for explosion-proof magnets are also known, in which not only the "pure" types of protection mentioned above are used, but also combinations of these types of protection, such as, for example, the types of protection "potting encapsulation" combined with "increased safety" or "pressure-resistant encapsulation" with "increased security".
Aufgabe der Erfindung ist es, einen explosionsgeschützten Ventilmagneten der gattungsgemäßen Art derart weiterzubilden, daß er bei Erfüllung der Zündschutzart „Druckfeste Kapselung" im Anschlußbereich externer Leitungen leicht und kostengünstig herstellbar ist.The object of the invention is to develop an explosion-proof valve magnet of the generic type in such a way that it can be produced easily and inexpensively in the connection area of external lines if the type of protection "flameproof encapsulation" is fulfilled.
Diese Aufgabe wird erfindungsgemäß bei einem Ventilmagnet der eingangs beschriebenen Art dadurch gelöst, daß die Spule und der Eisenkreis in eine in einem Gehäuseteil eingebrachte Vergußmasse eingebettet sind, die den Zutritt einer explosionsfähigen Atmosphäre zu spannungsführenden Teilen verhindert und gleichzeitig der Fixierung und elektrischen Isolierung dient (Vergußkapselung) und daß Anschlußelemente der Spule in einem Gehäuseteil angeordnet sind, das bei einer Explosion im Inneren einem Druck standhält und eine Übertragung der Explosion auf die Umgebung verhindert (druckfeste Kapselung) . Der große Vorteil der Teilung des Gehäuses in zwei Gehäuseteile, deren einer die Zündschutzart „Vergußkapselung" ψid deren anderer die Zündschutzart „Druckfeste Kapselung" erfüllt, hat den großen Vorteil, daß die Spule und der Eisenkreis, insbesondere die Magnetschlußhülse nicht Teil des druckfesten Raumes ist. Dieser Gehäuseteil kann somit ohne aufwendige Passungen auskommen, die wegen der zünddurchschlagsicheren Spalte bei druckfesten Kapselungen erforderlich sind. Durch die Vermeidung solcher Spalte, die eine vorgeschriebene Mindestlänge aufweisen müssen, kann außerdem die Baugröße des Magneten reduziert werden.This object is achieved according to the invention in a valve magnet of the type described at the outset in that the coil and the iron circuit are embedded in a casting compound which is introduced into a housing part and which prevents the access of an explosive atmosphere to live parts and at the same time serves for fixing and electrical insulation (encapsulation encapsulation ) and that connection elements of the coil are arranged in a housing part which withstands an internal pressure in the event of an explosion and prevents transmission of the explosion to the environment (pressure-resistant encapsulation). The great advantage of dividing the housing into two housing parts, one of which fulfills the type of protection "encapsulation" derenid the other of the type of protection "flameproof encapsulation" has the great advantage that the coil and the iron circuit, especially the magnetic sleeve is not part of the pressure-resistant space . This part of the housing can thus do without the complex fits that are required for flameproof enclosures because of the flame-proof gap. By avoiding such gaps, which must have a prescribed minimum length, the size of the magnet can also be reduced.
Neben seiner einfachen Herstellung ist bei einem derartigen Ventilmagneten auch vorteilhaft, daß vergußgekapselte Spulen und Eisenkreise oder Magnetschlußhülsen als Standardteile zur Verfügung stehen, woraus sich eine kleinere Lagerhaltung resultiert. Trotzdem sind die externen Leitungen in einem druckfest gekapselten, in dem zweiten Gehäuseteil angeordneten Raum anschließbar.In addition to its simple manufacture, it is also advantageous with such a valve magnet that encapsulated coils and iron circles or magnetic connection sleeves are available as standard parts, which results in a smaller inventory. Nevertheless, the external lines can be connected in a pressure-tightly encapsulated space arranged in the second housing part.
Weitere Vorteile und Merkmale der Erfindung sind Gegenstand der nachfolgenden Beschreibung sowie der zeichnerischen Darstellung eines Ausführungsbeispiels der Erfindung.Further advantages and features of the invention are the subject of the following description and the drawing of an embodiment of the invention.
In der Zeichnung zeigen: Fig. 1 einen erfindungsgemäßen Ventilmagneten in Explosionsdarstellung undThe drawing shows: Fig. 1 shows a valve magnet according to the invention in an exploded view and
Fig. 2„. eine Schnittdarstellung des in Fig. 1 dargestellten erfindungsgemäßen Ventilmagneten.Fig. 2 ". a sectional view of the valve magnet according to the invention shown in Fig. 1.
Ein Ventilmagnet, dargestellt in Fig. 1 und Fig. 2, umfaßt ein Gehäuse 10, das in zwei Gehäuseteile 11, 12 unterteilt ist.A valve magnet, shown in FIGS. 1 and 2, comprises a housing 10 which is divided into two housing parts 11, 12.
In dem die Zündschutzart „Vergußkapselung, EExm" erfüllenden Gehäuseteil 12 sind in eine Vergußmasse 20 eine Spule 30 und ein Eisenkreis 31 eingebettet. Die Spule weist eine durchgängige Öffnung 32 zur Aufnahme eines Ankers auf, durch den auf an sich bekannte Weise ein Ventil in einer explosionsgefährdeten Umgebung betätigbar ist. In die Vergußmasse 20 sind ferner elektrische Anschlußelemente 41 eingebettet, welche über die den Gehäuseteil 12 stirnseitig abschließende Vergußmasse 20 überstehen. Die Vergußmasse 20 dient dem Fernhalten explosionsfähiger Atmosphäre sowie der Fixierung und elektrischen Isolierung.A coil 30 and an iron circuit 31 are embedded in a casting compound 20 in the housing part 12 which fulfills the type of protection “encapsulation, EExm”. The coil has a through opening 32 for receiving an armature, through which, in a manner known per se, a valve in a Electrical connection elements 41 are also embedded in the potting compound 20, which protrude beyond the potting compound 20 that closes the end of the housing part 12. The potting compound 20 serves to keep an explosive atmosphere away as well as for fixing and electrical insulation.
Diese Anschlußelemente 41 zum Anschluß elektrischer Leitungen zur Betätigung der Spule 30 sind in dem anderen Gehäuseteil 11 angeordnet, der die Zündschutzart „Druckfeste Kapselung" erfüllt. Externe Leitungen werden über eine Öffnung 14 in den Innenraum des druckfest gekapselten Gehäuseteils 11 eingeführt. Der Gehäuseteil 11 ist stirnseitig durch einen Deckel 17 verschlossen, der mit einem an ihm ausgebildeten Vorsprang 17a so in eine stirnseitige Öffnung 18 des Gehäuses eingreift, daß der Vorsprung 17a über eine vorgegebene Länge mit der zu dem Vorsprung 17a komplementär ausgebildeten Öffnung 18 unter Ausbildung eines zünddurchschlagsicheren Spalts zwischen dem Vorsprung 17a und der Öffnung 18 überlappt. Ferner kann eine Dichtung 60 vorgesehen sein, die im montierten Zustand zwischen dem Deckel 17 und dem Gehäuse 10 angeordnet ist.These connection elements 41 for connecting electrical lines for actuating the coil 30 are arranged in the other housing part 11, which fulfills the “flameproof enclosure” type of protection. External lines are introduced into the interior of the flameproof housing part 11 via an opening 14. The housing part 11 is closed at the end by a cover 17 which engages with a projection 17a formed on it in an end opening 18 of the housing such that the projection 17a over a predetermined length with the opening 18 complementary to the projection 17a to form a ignition-proof gap overlaps between the projection 17a and the opening 18. Furthermore, a seal 60 can be provided, which is arranged between the cover 17 and the housing 10 in the assembled state.
Der Gehäuseteil 11 ist so ausgebildet, daß er bei der Explosion eines explosionsfähigen Gemisches in seinem Inneren einen durch Normvorschriften vorgegebenen Druck aushält und eine Übertragung der Explosion auf die Umgebung des Gehäuses 10 verhindert wird.The housing part 11 is designed in such a way that, in the event of an explosion of an explosive mixture, it can withstand a pressure prescribed by standard regulations and a transmission of the explosion to the surroundings of the housing 10 is prevented.
Der Vorteil des oben beschriebenen Ventilmagnets besteht darin, daß die Vergußkapselung des Gehäuseteils 12 und damit ein explosionsgeschützter Ventilmagnet, der die kombinierte Zündschutzart EExmd (Vergußkapselung und druckfeste Kapselung) erfüllt, auf einfache Weise und daher kostengünstig herstellbar ist. The advantage of the valve magnet described above is that the encapsulation encapsulation of the housing part 12 and thus an explosion-proof valve magnet, which fulfills the combined type of protection EExmd (encapsulation encapsulation and flameproof encapsulation), is simple and therefore inexpensive to produce.

Claims

IMI Norgren-Herion Fluidtronic GmbH & Co. KG, 70736 FellbachIMI Norgren-Herion Fluidtronic GmbH & Co. KG, 70736 Fellbach
PatentanspruchClaim
Ein Ventilmagnet umfassend eine Spule (30) und einen Eisenkreis (31), die in einem in explosionsgefährdeten Bereichen einsetzbaren Gehäuse (10) angeordnet sind, ist dadurch gekennzeichnet, daß die Spule (30) und der Eisenkreis (31) in eine in einem Gehäuseteil eingebrachte Vergußmasse (20) eingebettet sind, die den Zutritt einer explosionsfähigen Atmosphäre zu spannungs führenden Teilen verhindert und gleichzeitig der Fixierung und elektrischen Isolierung dient (Vergußkapselung) und daß Anschlußelemente (41) der Spule (30) in einem Gehäuseteil (11) angeordnet sind, das bei einer Explosion im Inneren einem Druck standhält und eine Übertragung der Explosion auf die Umgebung verhindert (druckfeste Kapselung). A valve magnet comprising a coil (30) and an iron circuit (31), which are arranged in a housing (10) which can be used in potentially explosive areas, is characterized in that the coil (30) and the iron circuit (31) are integrated in one housing part embedded casting compound (20) are embedded, which prevents the access of an explosive atmosphere to live parts and at the same time serves for fixing and electrical insulation (encapsulation) and that connection elements (41) of the coil (30) are arranged in a housing part (11), that withstands pressure in the event of an explosion and prevents the explosion from being transmitted to the environment (flameproof enclosure).
EP99953536A 1998-09-23 1999-08-19 Valve magnet Expired - Lifetime EP1116247B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843519 1998-09-23
DE19843519A DE19843519A1 (en) 1998-09-23 1998-09-23 Valve solenoid
PCT/DE1999/002602 WO2000017895A1 (en) 1998-09-23 1999-08-19 Valve magnet

Publications (2)

Publication Number Publication Date
EP1116247A1 true EP1116247A1 (en) 2001-07-18
EP1116247B1 EP1116247B1 (en) 2004-07-28

Family

ID=7881894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99953536A Expired - Lifetime EP1116247B1 (en) 1998-09-23 1999-08-19 Valve magnet

Country Status (5)

Country Link
US (1) US6752372B1 (en)
EP (1) EP1116247B1 (en)
JP (2) JP2002525862A (en)
DE (2) DE19843519A1 (en)
WO (1) WO2000017895A1 (en)

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US7433169B2 (en) * 2005-12-15 2008-10-07 Raycap Corporation Overvoltage protection devices including wafer of varistor material
DE102008003211B4 (en) * 2007-01-05 2014-06-18 Hilite Germany Gmbh Pressure valve with integrated lid, in particular suitable fastening and method for fixing the lid
US20080202597A1 (en) * 2007-02-27 2008-08-28 Bag Filter Enterprise Co., Ltd. Explosion-proof diaphragm valve assembly
DE102007058608A1 (en) * 2007-12-04 2009-06-10 Endress + Hauser Flowtec Ag Electric device
FR2984757B1 (en) * 2011-12-23 2014-06-20 Parker Hannifin Mfg Switzerland Sa DRAIN DEVICE
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US9401241B2 (en) * 2014-04-29 2016-07-26 Automatic Switch Company Solenoid coil for hazardous locations
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
CN106246987A (en) * 2016-08-16 2016-12-21 张小高 A kind of new type explosion proof electromagnetic valve
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10340110B2 (en) 2017-05-12 2019-07-02 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
CN113218115A (en) * 2020-01-21 2021-08-06 苏州华越金属有限公司 Protective sleeve and using method thereof
DE102020131398B3 (en) 2020-11-26 2021-09-16 Samson Aktiengesellschaft Device and method for actuating an actuator in an explosive or fire-endangered environment and based thereon IP converters, solenoid valves, positioners, control valves and systems
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11990745B2 (en) 2022-01-12 2024-05-21 Raycap IP Development Ltd Methods and systems for remote monitoring of surge protective devices

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Also Published As

Publication number Publication date
JP2002525862A (en) 2002-08-13
WO2000017895A1 (en) 2000-03-30
EP1116247B1 (en) 2004-07-28
DE19843519A1 (en) 2000-04-06
JP2010161394A (en) 2010-07-22
JP4838366B2 (en) 2011-12-14
DE59910076D1 (en) 2004-09-02
US6752372B1 (en) 2004-06-22

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