EP1333539B1 - Elektricher Teil für Magnetventil - Google Patents

Elektricher Teil für Magnetventil Download PDF

Info

Publication number
EP1333539B1
EP1333539B1 EP20030001348 EP03001348A EP1333539B1 EP 1333539 B1 EP1333539 B1 EP 1333539B1 EP 20030001348 EP20030001348 EP 20030001348 EP 03001348 A EP03001348 A EP 03001348A EP 1333539 B1 EP1333539 B1 EP 1333539B1
Authority
EP
European Patent Office
Prior art keywords
housing
connecting chamber
electric
cover
chamber
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.)
Expired - Lifetime
Application number
EP20030001348
Other languages
English (en)
French (fr)
Other versions
EP1333539A1 (de
Inventor
Christophe Favre
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.)
Parker Hannifin Manufacturing Switzerland SA
Original Assignee
Parker Hannifin Manufacturing Switzerland SA
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 Parker Hannifin Manufacturing Switzerland SA filed Critical Parker Hannifin Manufacturing Switzerland SA
Publication of EP1333539A1 publication Critical patent/EP1333539A1/de
Application granted granted Critical
Publication of EP1333539B1 publication Critical patent/EP1333539B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/527—Flameproof cases

Definitions

  • the present invention relates to the explosion-proof electrical part of a solenoid valve comprising a housing enclosing a coil, on which there is an electrical connection chamber closed by a cover, the housing being intended to be coupled with the mechanical part of a solenoid valve, the coil constituting the electromagnetic actuator of the valve.
  • enclosures and electrical connection chambers are made of metal alloy, for example made of ferritic cast iron.
  • EN 50018 tolerates the internal explosions but imposes on the envelopes of these materials to be able to withstand these internal explosions that they could undergo due to gas locked in their housings. These explosions must be contained by the envelope, that is to say, be without impact on the explosive external environment.
  • the electrical connection chambers are made of metal, like the rest of the electrical part, the actual chamber having come in one piece with the housing, such a manufacturing requiring a recovery machining in addition to the injection .
  • the tolerances of the functional interlockings of the cover on the connection chamber providing a barrier against the propagation of flames due to the explosion towards the outside environment, which are defined by the standards, require machining operations which make the cost of manufacturing the electrical parts is high.
  • the object of the invention is to provide the electrical part of a solenoid valve overcoming these disadvantages.
  • the invention proposes to provide an explosion-proof electrical part meeting the specifications of the European standard EN 50018 for the use of electrical equipment in an explosive environment, whose housing and the electrical connection chamber are made of molded plastic, thereby reducing manufacturing costs.
  • housing means any means containing the coil, the metal conductors supplying the coil and, optionally, a thermal protection element.
  • the housing of the electrical part is either closed by a cover, or in the form of two half-shells, or monobloc.
  • the electrical part shown in figure 3 consists of a housing 1 closed by a cover 2.
  • This housing encloses an electromagnetic coil 11, electrical conductors 12 and a thermal protection element 13.
  • This housing is made of plastic material and the unoccupied volume 16 that it defines is filled with a resin, preferably a class H resin, during manufacturing.
  • On this housing is disposed an electrical connection chamber 3 closed by a plastic cover 30, held in position by means of a screw 8 in a nut 17 inserted in the housing 1.
  • This chamber contains the ends of the electrical conductors 12 supplying the coil 11, these conductors being connected to connection means of the AMP type or the like intended for the connection of supply cables 18 penetrating into the housing 1 through the orifice 14.
  • This chamber also contains a fuse 19 limiting the current electric.
  • the housing 1 has on its upper face a wall 4 accommodating in a groove 5 of the cover 30 and crushing a seal 6 located at the bottom of this groove 5.
  • the functional clearances allowing the housing 1 and the cover 30 to fit together in the other are defined by the norms regulating the use of electrical equipment in explosive environment, in particular the European norm EN 50018. This embedding and these functional games make it possible to prevent the propagation of the flames of an explosion in the chamber of electrical connection 3 to the potentially explosive environment.
  • the bottom of the cover 30 has protrusions, such as the protrusion 10 visible to the figure 3 , to reduce the unoccupied volume in the electrical connection chamber. Thus, we reduce the amount of gas trapped in the electrical connection chamber 3 and, therefore, the violence of a possible explosion in the electrical connection chamber. This risk being reduced, it is then possible, by complying with the European standard EN 50018 setting the maximum unoccupied volume in a plastic enclosure to 10 cm 3 , to make the connection chamber 3 and its cover 30 in such a material.
  • the projections are only or also on the bottom of the connection chamber. It is preferable that the projections are only on the cover so as not to hinder access to the connections. Thus, the unoccupied volume can be relatively large before closing and small with the lid.
  • the housing 1 can be closed, as shown on the figure 1 by a cover 2 after filling the volume 16 with a resin.
  • the housing 1 can be made by means of two half-shells together defining an unoccupied volume which is filled with a resin during manufacture.
  • the electrical connection chamber 3 is preferably made separately and inserted into the housing 1, either in an opening provided for this purpose in the housing or between two cuts if the housing 1 is made by means of two inserts and welded half-shells. .
  • the housing 1 can still be made by inserting the various components in a plastic material.
  • the coil 11, the electrical conductors 12 and the thermal protection element 13 are arranged in an injection mold, in which the connection chamber 3 has been previously deposited and positioned and then injecting the plastic material, a casing is obtained. presenting no unoccupied volume.
  • the insert constituting the connection chamber could have a groove into which a wall of the cover would fit, the volume of the connection chamber being entirely defined by the cover in the form of a cover, the insert being essentially flat.

Claims (7)

  1. Explosionsgeschützter elektrischer Schaltungsteil eines Magnetventils, welches ein Gehäuse (1) aufweist, in dem sich vor allem eine Spule (11) befindet, auf welcher eine Kammer zur elektrischen Verbindung (3) angeordnet ist, und welches durch einen ersten Deckel (30) verschlossen ist, dadurch gekennzeichnet, dass das Gehäuse (1), die Verbindungskammer (3) sowie der erste Deckel (30) aus Kunststoff ausgeführt sind, und dass der erste Deckel (30) und/oder der Boden der Verbindungskammer Vorsprünge (10) aufweisen, die dazu bestimmt sind, das nicht ausgefüllte Volumen der elektrischen Verbindungskammer auszufüllen.
  2. Elektrischer Schaltungsteil nach Anspruch 1, dadurch gekennzeichnet, dass die Verbindungskammer (3) aus einem Stück besteht, welches am Gehäuse angeformt ist.
  3. Elektrischer Schaltungsteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Gehäuse (1) durch einen zweiten Deckel (2) verschlossen ist.
  4. Elektrischer Schaltungsteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Gehäuse (1) in Form zweier Halbschalen ausgeführt ist.
  5. Elektrischer Schaltungsteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Gehäuse (1) aus einem Block besteht.
  6. Verfahren zur Herstellung eines explosionsgeschützten elektrischen Schaltungsteils eines Magnetventils nach Anspruch 2, dadurch gekennzeichnet, dass ein Gehäuse (1), ein Werkstück zur Bildung zusammen mit einem ersten Deckel eine elektrische Verbindungskammer (3) bildet und der erste Deckel (30) der Verbindungskammer getrennt hergestellt werden, wobei das Gehäuse (1), die Verbindungskammer (3) sowie der erste Deckel (30) aus Kunststoff bestehen und der erste Deckel (30) und/oder der Boden der Verbindungskammer Vorsprünge (10) aufweisen, die dazu bestimmt sind, das unbenutzte Volumen der elektrischen Verbindungskammer zu vermindern; sodann werden hauptsächlich die Spule (11) sowie zugehörige elektrische Leiter (12) im Gehäuse (1) untergebracht, worauf das Gehäuse (1) und das genannte Werkstück der Verbindungskammer derart miteinander vereinigt werden, dass sich die elektrische Verbindungskammer auf dem Gehäuse befindet, und schliesslich wird das Gehäuse (1) mit einem Füllmaterial aufgefüllt.
  7. Verfahren zur Herstellung eines explosionsgeschützten elektrischen Schaltungsteils eines Magnetventils gemäss Anspruch 5, dadurch gekennzeichnet, dass in eine Spritzgussform mindestens die Spule (11), die zugehörigen elektrischen Leiter (12) sowie die Verbindungskammer (3) eingebracht und positioniert werden, worauf ein Kunststoff eingespritzt wird, wobei ein Gehäuse erhalten wird, welches kein unbenutztes freies Volumen aufweist, auf welchem sich die elektrische Verbindungskammer befindet, wobei die elektrische Verbindungskammer von einem ersten Deckel verschlossen wird sowie der erste Deckel aus Kunststoff besteht, und wobei der erste Deckel (30) und/oder der Boden der Verbindungskammer Vorsprünge (10) aufweisen, die dazu bestimmt sind, das freie Volumen der elektrischen Verbindungskammer zu vermindern.
EP20030001348 2002-02-05 2003-01-24 Elektricher Teil für Magnetventil Expired - Lifetime EP1333539B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1902002 2002-02-05
CH1902002 2002-02-05

Publications (2)

Publication Number Publication Date
EP1333539A1 EP1333539A1 (de) 2003-08-06
EP1333539B1 true EP1333539B1 (de) 2012-06-20

Family

ID=4436808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030001348 Expired - Lifetime EP1333539B1 (de) 2002-02-05 2003-01-24 Elektricher Teil für Magnetventil

Country Status (2)

Country Link
EP (1) EP1333539B1 (de)
DK (1) DK1333539T3 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK53383A (da) * 1983-02-08 1984-08-09 Granzow Aps P Kondensatudtoemningsventil
GB8512134D0 (en) * 1985-05-14 1985-06-19 Bicc Plc Electric coupler
DE4118834B4 (de) * 1991-06-07 2005-05-12 Continental Teves Ag & Co. Ohg Hydraulikaggregat
JP3250488B2 (ja) * 1996-09-26 2002-01-28 住友電気工業株式会社 液圧制御装置

Also Published As

Publication number Publication date
DK1333539T3 (da) 2012-09-17
EP1333539A1 (de) 2003-08-06

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