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EP1925060B1 - Explosion-proof plug-in connector - Google Patents

Explosion-proof plug-in connector Download PDF

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Publication number
EP1925060B1
EP1925060B1 EP06762532.7A EP06762532A EP1925060B1 EP 1925060 B1 EP1925060 B1 EP 1925060B1 EP 06762532 A EP06762532 A EP 06762532A EP 1925060 B1 EP1925060 B1 EP 1925060B1
Authority
EP
European Patent Office
Prior art keywords
plug
explosion
connector according
socket
proof connector
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.)
Active
Application number
EP06762532.7A
Other languages
German (de)
French (fr)
Other versions
EP1925060A1 (en
Inventor
Dieter Sauer
Reiner Naumann
Gerhard Schwarz
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.)
Eaton Protection Systems IP GmbH and Co KG
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Eaton Protection Systems IP 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.)
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Publication of EP1925060A1 publication Critical patent/EP1925060A1/en
Application granted granted Critical
Publication of EP1925060B1 publication Critical patent/EP1925060B1/en
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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
    • 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
    • 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
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/622—Screw-ring or screw-casing

Definitions

  • the invention relates to an explosion-proof connector having a plug part and a female connector part, wherein the plug part has a plug housing and at least two plug pins arranged in a plug insert and the plug socket part has a plug socket housing with corresponding plug-in sockets arranged in a socket insert.
  • Such explosion-proof connector is from the DE 200 13 819 known.
  • an electrical contact between plug pins and sockets is interrupted before the actual separation of the plug part and socket outlet or their housings.
  • the plug housing is designed such that it is held in a retaining position before complete release and in such a retaining position between the housings and plug pins or plug-in sockets a substantially closed to the outside interior space is formed.
  • Such an explosion-proof plug connector can be used well in potentially explosive atmospheres and reliably prevents sparks that may occur when the corresponding contact elements are separated from igniting an explosive medium present in the potentially explosive area.
  • FR 2 705 502 A1 describes a connector with a male part and a female connector part.
  • an outer sleeve is rotatably and axially non-displaceably arranged.
  • Corresponding seals are provided between this outer sleeve and the plug part or socket part, of which at least one in all different positions of the plug socket part seals the outer sleeve relative to the plug part part relative to the plug part.
  • the plug connection comprises a stationary plug part and a movable plug part. Both parts are mechanically connected by a metallic sleeve. This has in each case a left and a right-hand thread. It is noted in this document that left- and right-hand threads provide sufficient gap width and gap length to form flameproof and pressure resistant gaps.
  • EP 1202399A2 discloses another male with a union nut and WO 99/27615 describes a device for connecting and connecting a line, wherein in a two-part housing a plug-in coupling is releasably mounted, which has a plug part and a socket part.
  • the invention has for its object to improve by simple design measures an explosion-proof connector for easier handling, especially in the separation of male and female parts while maintaining the explosion protection.
  • one of the housings of plug part or socket part has an outer sleeve.
  • This is detachably connectable to the other housing, wherein even before electrical contact or after disconnecting the contacting of plug pins and plug-in sockets, a first gap between the outer sleeve and the other housing and a second gap between the outer sleeve and associated insert, that is plug insert or socket insert, for the realization of the type of protection flameproof enclosure (d) or increased security (e) are formed.
  • the outer sleeve may be formed as a threaded sleeve with internal thread of its screw-on.
  • the corresponding first gap is formed between this internal thread and the other housing.
  • the outer sleeve or screw sleeve is part of the plug part.
  • the handling in the connection or disconnection of the plug part and socket part is simplified if the outer sleeve part of the socket housing and is rotatably mounted relative to the socket insert.
  • the corresponding receptacle part is usually fixed to a device in the hazardous area and the corresponding plug part due to, for example, a movable cable connection to the female connector part and can be connected to this.
  • the female insert can be formed from a plastic material and in particular sealed and pressure-resistant to plug sockets and their electrical justifyier sculpture be poured.
  • electrical contacting elements are, for example, a cable with arranged in this contact wires.
  • the bushing insert has a metal ring on its outside facing the inside of the sleeve of the outer sleeve, and the second gap is formed between this and the sleeve inside.
  • the female insert or the male insert may be formed of a plastic material, and the male or female pins are movably supported to form an explosion-proof gap in that material.
  • a one-sided floating embedding - either pins or sockets - which is also possible under consideration of the maximum gap widths according to the relevant regulations. The radial compensation of the manufacturing tolerances can then be done via this game.
  • the radial compensation can also be done via a resilient contact inside the bushes.
  • a simple formation of a corresponding gap can result from the fact that the bushing insert forms on its inside facing the inside of the sleeve outside in a fixed area directly with the sleeve inside the second gap.
  • the internal thread of the screw can extend from the screw-on end to the metal ring.
  • the rotatable mounting of the screw can be formed for example by a radially inwardly projecting annular flange which extends to the outside of the female insert.
  • this can be formed essentially pot-shaped with external thread from the free end.
  • the plug housing can then be inserted into the screw and with this by screwing be detachably connected.
  • the first gap is formed between the threads.
  • the socket insert In order for the corresponding first gap to be formed even before electrical contacting of plug pins and socket inserts, the socket insert extends correspondingly far in the direction of the plug pins, so that they are already plugged into internal bores of the socket insert when the threaded engagement between screw sleeve and plug housing is produced, but not yet Inner holes are inserted up to the socket inserts for electrical contacting.
  • plug housing and outer sleeve are formed at least in the region of the thread of metal. This applies analogously to the outer sleeve in the region of the metal ring, which may also be formed in this area of metal.
  • an insulating sleeve can be arranged as a plug insert, at least between plug housing and plug pins.
  • a plastic material can be sealed tightly and pressure-tight between the insulating sleeve and electrical leads to the plug pins.
  • the plug pins 6 extend from the insulating sleeve 26 in the direction of the free end 25 of the plug housing 4. There they end flush with the free end 25th
  • the female insert 8 on its outer side 18 on a radially outwardly projecting annular flange 22. With this is a bottom 23 of the metal ring 19 in Appendix.
  • the metal ring 19 is substantially T-shaped with a horizontal T-bar 20 and a vertical T-bar 21.
  • the horizontal T-bar 20 has the corresponding bottom 23 and the vertical T-bar 21 is for attachment to the female insert 8 also encapsulated by the corresponding plastic material.
  • the connector according to the invention can be used in potentially explosive areas, wherein the gaps 11, 12 meet the criteria for flameproof enclosure d or increased security e.
  • the plug pins 6 are inserted at least in these inner holes 31, without an electrical contact between the plug pins 6 and plug-in sockets 9 is already made.
  • the corresponding column 11 and 12 are already formed, without already flowing a current.
  • connection of the plug part 2 and female connector part 3 is carried out by the sleeve 13 formed as an outer sleeve 10, which is screwed by means of its internal thread 14 on the external thread 24 of the plug housing 4. Only upon further screwing the screw 3 on the connector housing 4 is followed by a further approximation of connector pins 6 and plug-in sockets 9 until finally the ends 30 of the connector pins 6 in contact with the metallic plug-in sockets 9 for making an electrical connection. After complete screwing the plug pins are then inserted as far as possible in the plug-in sockets 9. The insertion can be done until the contact of the free end 25 with the radially outwardly projecting annular flange 22 and the metal ring 19. For this purpose, the internal thread 14 of the threaded sleeve 13 extends correspondingly from the screwed-15 to approximately the metal ring 19th
  • the invention it is possible to disconnect an electrical connection between the plug part and the socket part in particular without disconnecting the voltage by means of the explosion-proof plug connector according to the invention, without the need for skilled workers to disconnect such connections.
  • An assembly of the connector takes place in the first step by means of two threads which are screwed together. By screwing creates a flameproof enclosure of the room in which the contact elements are arranged. By further rotation, the contact is made to pin and sockets. The resulting arcing can ignite the gas possibly present in the interior of the enclosure, but the defined gap and the mechanical stability of the flameproof enclosure prevent the ignition of the surrounding gas-containing atmosphere.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Description

Die Erfindung betrifft einen explosionsgeschützten Steckverbinder mit einem Steckerteil und einem Steckbuchsenteil, wobei der Steckerteil ein Steckergehäuse und zumindest zwei in einem Steckereinsatz angeordnete Steckerstifte und der Steckbuchsenteil ein Steckbuchsengehäuse mit in einem Buchseneinsatz angeordneten, entsprechenden Einsteckbuchsen aufweist.The invention relates to an explosion-proof connector having a plug part and a female connector part, wherein the plug part has a plug housing and at least two plug pins arranged in a plug insert and the plug socket part has a plug socket housing with corresponding plug-in sockets arranged in a socket insert.

Ein solcher explosionsgeschützter Steckverbinder ist aus der DE 200 13 819 bekannt. Um auch ohne Abschalten einer entsprechenden Spannung Steckerteil und Steckbuchsenteil in einem explosionsgefährdeten Bereich voneinander trennen zu können, wird eine elektrische Kontaktierung zwischen Steckerstiften und Steckbuchsen bereits vor der eigentlichen Trennung von Steckerteil und Steckbuchsenteil bzw. deren Gehäusen unterbrochen. Dabei ist das Steckergehäuse so ausgebildet, dass es in einer Rückhaltestellung vordem vollständigen Lösen gehalten ist und in einer solchen Rückhaltestellung zwischen den Gehäusen und Steckerstiften bzw. Einsteckbuchsen ein im Wesentlichen nach außen abgeschlossener Innenraum gebildet ist.Such explosion-proof connector is from the DE 200 13 819 known. In order to disconnect without disconnecting a corresponding voltage plug part and socket part in a hazardous area from each other, an electrical contact between plug pins and sockets is interrupted before the actual separation of the plug part and socket outlet or their housings. In this case, the plug housing is designed such that it is held in a retaining position before complete release and in such a retaining position between the housings and plug pins or plug-in sockets a substantially closed to the outside interior space is formed.

Ein solcher explosionsgeschützter Steckverbinder ist gut in explosionsgefährdeten Bereichen verwendbar und verhindert sicher, dass gegebenenfalls bei Trennung der entsprechenden Kontaktelemente auftretende Funken ein in dem explosionsgefährdeten Bereich vorhandenes explosibles Medium zünden.Such an explosion-proof plug connector can be used well in potentially explosive atmospheres and reliably prevents sparks that may occur when the corresponding contact elements are separated from igniting an explosive medium present in the potentially explosive area.

FR 2 705 502 A1 beschreibt einen Steckverbinder mit einem Steckerteil und einem Steckbuchsenteil. Auf dem Steckbuchsenteil ist eine Außenhülse drehbar und axial unverschieblich angeordnet. Zwischen dieser Außenhülse und dem Steckerteil bzw. Steckbuchsenteil sind entsprechende Dichtungen vorgesehen, von denen zumindest eine in allen unterschiedlichen Stellungen von Steckbuchsenteil relativ zum Steckerteil die Außenhülse gegenüber dem Steckbuchenteil abdichtet. FR 2 705 502 A1 describes a connector with a male part and a female connector part. On the female connector part, an outer sleeve is rotatably and axially non-displaceably arranged. Corresponding seals are provided between this outer sleeve and the plug part or socket part, of which at least one in all different positions of the plug socket part seals the outer sleeve relative to the plug part part relative to the plug part.

DE 199 04 037 A1 offenbart eine Steckverbindung in explosionsgeschützter Ausführung. Die Steckverbindung umfasst ein ortsfestes Steckerteil und ein bewegliches Steckerteil. Beide Teile sind mechanisch durch eine metallische Hülse verbunden. Diese weist jeweils ein Links- und ein Rechtsgewinde auf. In dieser Druckschrift wird darauf hingewiesen, dass Links- und Rechtsgewinde ausreichende Spaltweite und Spaltlänge zur Bildung zünddurchschlagssicherer und druckfester Spalte bilden. DE 199 04 037 A1 discloses a plug connection in explosion-proof design. The plug connection comprises a stationary plug part and a movable plug part. Both parts are mechanically connected by a metallic sleeve. This has in each case a left and a right-hand thread. It is noted in this document that left- and right-hand threads provide sufficient gap width and gap length to form flameproof and pressure resistant gaps.

DE 29 709 031 U1 offenbart ein elektrisches Steckverbinderteil mit einer gegenüber einem Steckkörper drehbaren Überwurfmutter. DE 29 709 031 U1 discloses an electrical connector part with a rotatable relative to a plug body union nut.

EP 1202399A2 offenbart ein weiteres Einsteckteil mit einer Überwurfmutter und WO 99/27615 beschreibt eine Einrichtung zum Anschließen und Verbinden einer Leitung, wobei in einem zweiteiligen Gehäuse eine Steckkupplung lösbar gelagert ist, welche ein Steckerteil und ein Buchsenteil aufweist. EP 1202399A2 discloses another male with a union nut and WO 99/27615 describes a device for connecting and connecting a line, wherein in a two-part housing a plug-in coupling is releasably mounted, which has a plug part and a socket part.

Im Hinblick auf DE 200 13 819 liegt der Erfindung die Aufgabe zugrunde, durch einfache konstruktive Maßnahmen einen explosionsgeschützten Steckverbinder zur vereinfachten Handhabung insbesondere bei der Trennung von Stecker- und Steckbuchsenteil unter Aufrechterhaltung des Explosionsschutzes zu verbessern.With regard DE 200 13 819 the invention has for its object to improve by simple design measures an explosion-proof connector for easier handling, especially in the separation of male and female parts while maintaining the explosion protection.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Erfindungsgemäß weist eines der Gehäuse von Steckerteil bzw. Steckbuchsenteil eine Außenhülse auf. Diese ist mit dem anderen Gehäuse lösbar verbindbar, wobei bereits vor elektrischer Kontaktierung bzw. nach Trennen der Kontaktierung von Steckerstiften und Einsteckbuchsen ein erster Spalt zwischen Außenhülse und dem anderen Gehäuse und ein zweiter Spalt zwischen Außenhülse und zugeordnetem Einsatz, das heißt Steckereinsatz bzw. Buchseneinsatz, zur Realisierung der Zündschutzart druckfeste Kapselung (d) bzw. erhöhte Sicherheit (e) ausgebildet sind.According to the invention, one of the housings of plug part or socket part has an outer sleeve. This is detachably connectable to the other housing, wherein even before electrical contact or after disconnecting the contacting of plug pins and plug-in sockets, a first gap between the outer sleeve and the other housing and a second gap between the outer sleeve and associated insert, that is plug insert or socket insert, for the realization of the type of protection flameproof enclosure (d) or increased security (e) are formed.

Auf diese Weise besteht die Möglichkeit, durch Verwendung der Außenhülse die Verbindung zwischen Steckerteil und Steckbuchsenteil in einfacher Weise herzustellen, wobei andererseits durch die beiden Spalte in sicherer Weise ein Explosionsschutz gegeben ist, da der gegebenenfalls mit einem explosiblen Medium gefüllte Innenraum des Steckverbinders nur über diese Spalte Kontakt mit dem Äußeren des Steckverbinders hat.In this way, it is possible by using the outer sleeve to make the connection between the plug part and female connector part in a simple manner, on the other hand given by the two column in a secure way explosion protection, as possibly filled with an explosive medium interior of the connector only on this Column has contact with the exterior of the connector.

Um eine einfache lösbare Verbindung zwischen Außenhülse und dem anderen Gehäuse des Steckverbinders herstellen zu können, kann die Außenhülse als Schraubhülse mit Innengewinde von ihrem Aufschraubende her ausgebildet sein. Dabei ist der entsprechende erste Spalt zwischen diesem Innengewinde und dem anderen Gehäuse gebildet.In order to produce a simple releasable connection between the outer sleeve and the other housing of the connector, the outer sleeve may be formed as a threaded sleeve with internal thread of its screw-on. In this case, the corresponding first gap is formed between this internal thread and the other housing.

Es besteht die Möglichkeit, dass die Außenhülse bzw. Schraubhülse Teil des Steckerteils ist. Die Handhabung bei dem Verbinden bzw. Trennen von Steckerteil und Steckbuchsenteil wird allerdings vereinfacht, wenn die Außenhülse Teil des Steckbuchsengehäuses und drehbar relativ zum Buchseneinsatz gelagert ist. Dabei ist zu beachten, dass der entsprechende Steckbuchsenteil in der Regel fest an einer Einrichtung im explosionsgefährdeten Bereich angeordnet ist und der entsprechende Steckerteil aufgrund beispielsweise einer beweglichen Kabelverbindung an den Steckbuchsenteil heranführbar und mit diesem verbindbar ist.There is the possibility that the outer sleeve or screw sleeve is part of the plug part. However, the handling in the connection or disconnection of the plug part and socket part is simplified if the outer sleeve part of the socket housing and is rotatably mounted relative to the socket insert. It should be noted that the corresponding receptacle part is usually fixed to a device in the hazardous area and the corresponding plug part due to, for example, a movable cable connection to the female connector part and can be connected to this.

Um einerseits die verschiedenen Einsteckbuchsen sicher voneinander elektrisch zu isolieren und gleichzeitig auch für die Verwendung in explosionsgefährdeten Bereichen mit entsprechenden elektrischen Kontaktelementen verbinden zu können, kann der Buchseneinsatz aus einem Kunststoffmaterial gebildet und insbesondere dicht und druckfest um Einsteckbuchsen und deren elektrische Kontaktierelemente gegossen sein. Solche elektrischen Kontaktierelemente sind beispielsweise ein Kabel mit in diesem angeordneten Kontaktdrähten.On the one hand to electrically isolate the different plug-in sockets from one another and at the same time to connect for use in potentially explosive areas with corresponding electrical contact elements, the female insert can be formed from a plastic material and in particular sealed and pressure-resistant to plug sockets and their electrical Kontaktierelemente be poured. Such electrical contacting elements are, for example, a cable with arranged in this contact wires.

Um in sicherer Weise auch den zweiten Spalt insbesondere hinsichtlich der Spaltbreite und Spaltform bilden zu können, weist der Buchseneinsatz auf seiner der Hülseninnenseite der Außenhülse zuweisenden Außenseite einen Metallring auf und zwischen diesem und der Hülseninnenseite ist der zweite Spalt gebildet.In order to be able to form the second gap in a secure manner, in particular with respect to the gap width and gap shape, the bushing insert has a metal ring on its outside facing the inside of the sleeve of the outer sleeve, and the second gap is formed between this and the sleeve inside.

Bei einem weiteren Ausführungsbeispiel kann der Buchseneinsatz bzw. der Steckereinsatz aus einem Kunststoffmaterial gebildet sein und die Einsteckbuchse bzw. die Steckerstifte sind beweglich unter Bildung eines explosionssicheren Spaltes in diesem Material gelagert. Auf diese Weise erfolgt eine einseitig schwimmende Einbettung - entweder Stifte oder Buchsen -, die unter Beachtung der maximalen Spaltweiten gemäß der einschlägigen Vorschriften ebenfalls möglich ist. Der radiale Ausgleich der Fertigungstoleranzen kann dann über dieses Spiel erfolgen.In another embodiment, the female insert or the male insert may be formed of a plastic material, and the male or female pins are movably supported to form an explosion-proof gap in that material. In this way, a one-sided floating embedding - either pins or sockets - which is also possible under consideration of the maximum gap widths according to the relevant regulations. The radial compensation of the manufacturing tolerances can then be done via this game.

Der radiale Ausgleich kann ebenso über einen federnden Kontakt im Inneren der Buchsen erfolgen.The radial compensation can also be done via a resilient contact inside the bushes.

Eine einfache Bildung eines entsprechenden Spalts kann sich dadurch ergeben, dass der Buchseneinsatz auf seiner der Hülseninnenseite zuweisende Außenseite in einem festgelegten Bereich direkt mit der Hülseninnenseite den zweiten Spalt bildet.A simple formation of a corresponding gap can result from the fact that the bushing insert forms on its inside facing the inside of the sleeve outside in a fixed area directly with the sleeve inside the second gap.

Um den Metallring außerdem gegenüber dem Buchseneinsatz genau festlegen zu können, kann der Buchseneinsatz im Bereich des Metallrings einen radial nach außen vorstehenden Ringflansch aufweisen, auf dem der horizontale T-Steg mit seiner der Hülseninnenseite abgewandeten Unterseite aufliegt. Dabei kann sich der entsprechende Ringflansch in Längsrichtung des Buchseneinsatzes mit zum horizontalen T-Steg entsprechender Länge erstrecken.In order to determine the metal ring also relative to the bushing insert accurately, the socket insert in the region of the metal ring may have a radially outwardly projecting annular flange on which the horizontal T-web rests with its side facing away from the sleeve inner side. In this case, the corresponding annular flange can extend in the longitudinal direction of the bushing insert to the horizontal T-web corresponding length.

Um die Schraubhülse in einfacher Weise auf den Buchseneinsatz unverlierbar anzuordnen, kann das Innengewinde der Schraubhülse sich vom Aufschraubende bis zum Metallring erstrecken. Dadurch verhindert beispielsweise das Gewinde ein Herabrutschen der Schraubhülse durch Kontakt mit dem Metallring, wobei die drehbare Lagerung der Schraubhülse beispielsweise durch einen radial nach Innen vorstehenden Ringflansch gebildet sein kann, der sich bis zur Außenseite des Buchseneinsatzes erstreckt.In order to arrange the screw sleeve in a simple manner captive on the socket insert, the internal thread of the screw can extend from the screw-on end to the metal ring. As a result, for example, prevents the thread from slipping down the screw by contact with the metal ring, wherein the rotatable mounting of the screw can be formed for example by a radially inwardly projecting annular flange which extends to the outside of the female insert.

Der entsprechende Metallring kann in diesem Zusammenhang zwischen dem Innengewinde der Schraubhülse und dem entsprechenden Ringflansch angeordnet sein.The corresponding metal ring can be arranged in this connection between the internal thread of the screw and the corresponding annular flange.

Um entsprechend einfach auch das Steckergehäuse zu gestalten, kann dieses im Wesentlichen topfförmig mit Außengewinde vom freien Ende her ausgebildet sein. Das Steckergehäuse kann dann in die Schraubhülse eingesteckt und mit dieser durch Verschrauben lösbar verbunden werden. Dabei wird der erste Spalt zwischen den Gewinden gebildet.In order to make the connector housing correspondingly simple, this can be formed essentially pot-shaped with external thread from the free end. The plug housing can then be inserted into the screw and with this by screwing be detachably connected. In this case, the first gap is formed between the threads.

Damit der entsprechende erste Spalt bereits vor elektrischer Kontaktierung von Steckerstiften und Buchseneinsätzen gebildet ist, erstreckt sich der Buchseneinsatz entsprechend weit in Richtung der Steckerstifte, so dass diese bereits in Innenbohrungen des Buchseneinsatzes bei Herstellen des Gewindeeingriffs zwischen Schraubhülse und Steckergehäuse eingesteckt, aber noch nicht über diese Innenbohrungen bis zu den Buchseneinsätzen zur elektrischen Kontaktierung eingeführt sind.In order for the corresponding first gap to be formed even before electrical contacting of plug pins and socket inserts, the socket insert extends correspondingly far in the direction of the plug pins, so that they are already plugged into internal bores of the socket insert when the threaded engagement between screw sleeve and plug housing is produced, but not yet Inner holes are inserted up to the socket inserts for electrical contacting.

Vorteilhaft ist im Zusammenhang mit dem Explosionsschutz, wenn Steckergehäuse und Außenhülse zumindest im Bereich der Gewinde aus Metall gebildet sind. Dies gilt analog für die Außenhülse im Bereich des Metallrings, die auch in diesem Bereich aus Metall gebildet sein kann.It is advantageous in the context of explosion protection, when plug housing and outer sleeve are formed at least in the region of the thread of metal. This applies analogously to the outer sleeve in the region of the metal ring, which may also be formed in this area of metal.

Um gegenüber einem Steckergehäuse aus Metall in einfacher Weise die Steckerstifte elektrisch zu isolieren, kann zumindest zwischen Steckergehäuse und Steckerstiften eine Isolierhülse als Steckereinsatz angeordnet sein.In order to electrically insulate the plug pins against a metal plug housing in a simple manner, an insulating sleeve can be arranged as a plug insert, at least between plug housing and plug pins.

Um die Steckerstifte innerhalb der Isolierhülse in einfacher und sicherer Weise elektrisch kontaktieren zu können, kann zwischen Isolierhülse und elektrischen Zuleitungen zu den Steckerstiften ein Kunststoffmaterial dicht und druckfest vergossen sein.In order to be able to contact the plug pins within the insulating sleeve in a simple and reliable manner, a plastic material can be sealed tightly and pressure-tight between the insulating sleeve and electrical leads to the plug pins.

Um gegebenenfalls mit dem Steckerteil in einfacher Weise andere Einrichtungen verbinden zu können, kann das Steckergehäuse ein seinem freien Ende gegenüberliegendes Schraubende aufweisen, durch welches elektrische Zuleitungen hindurchgeführt und in welchem die elektrischen Zuleitungen mit Kunststoffmaterial dicht und druckfest vergossen sind.In order to be able to connect other devices with the plug part in a simple manner, the plug housing can have a screw end opposite its free end, through which electrical leads pass and in which the electrical leads are sealed tightly and pressure-resistant with plastic material.

Um bei der Handhabung des Steckverbinders eine einfache Zuordnung von Steckerstiften und Einsteckbuchsen zu ermöglichen, kann das freie Ende des Steckergehäuses bündig mit Enden der Steckerstifte abschließen. Auf diese Weise sind die Steckerstifte bei der Handhabung gut sichtbar und können in einfacher Weise den entsprechenden Innenbohrungen des Buchseneinsatzes bzw. den Einsteckbuchsen zugeordnet werden. Diese Zuordnung lässt sich weiter dadurch vereinfachen, wenn der Buchseneinsatz aus dem Aufschraubende der Schraubhülse vorsteht.In order to enable a simple assignment of plug pins and plug-in sockets when handling the connector, the free end of the plug housing can be flush with ends of the plug pins. In this way, the pins are easily visible during handling and can be assigned in a simple manner to the corresponding inner holes of the female insert or the plug-in sockets. This assignment can be further simplified by the fact that the socket insert protrudes from the screwed end of the screw sleeve.

Der erfindungsgemäße Steckverbinder kann grundsätzlich aus Kunststoff mit eingelegten Metallteilen zur Spaltbildung, aus Vollkunststoff oder auch mit Hilfe von metallischen Gewindehülsen hergestellt werden. Bei einem Beispiel sind die gewindetragenden Teile aus metallischem Werkstoff und die Innenteile aus isolierendem Kunststoff hergestellt. Eine Vollkunststoffausführung des kompletten Steckverbinders ist ebenso möglich. Es ist lediglich darauf zu achten, dass die stromführenden Teile isoliert im Sinne der einschlägigen Vorschriften eingebettet sind.The connector according to the invention can in principle be made of plastic with inserted metal parts for gap formation, made of solid plastic or with the help of metallic threaded sleeves. In one example, the threaded parts are made of metallic material and the inner parts are made of insulating plastic. A full plastic version of the complete connector is also possible. It is only necessary to ensure that the live parts are embedded in isolation according to the relevant regulations.

Im Folgenden wird die Erfindung anhand eines in den Figuren dargestellten Ausführungsbeispiels näher beschrieben.The invention will be described in more detail below with reference to an embodiment shown in the figures.

Es zeigen:

Figur 1
einen Längsschnitt durch einen explosionsgeschützten Steckverbinder gemäß Erfindung mit voneinander getrenntem Steckerteil und Steckbuchsenteil und
Figur 2
einen Längsschnitt analog zu Figur 1 mit teilweise im Steckbuchsenteil eingestecktem Steckerteil.
Show it:
FIG. 1
a longitudinal section through an explosion-proof connector according to the invention with a separate plug part and socket part and
FIG. 2
a longitudinal section analogous to FIG. 1 partially plugged into the female connector part.

In Figur 1 ist ein erfindungsgemäßer Steckverbinder 1 im Längsschnitt dargestellt. Der Steckverbinder 1 umfasst ein Steckerteil 2 und ein Steckbuchsenteil 3, die in Figur 1 voneinander beabstandet angeordnet sind. Steckerteil 2 weist ein in etwa topfförmiges Steckergehäuse 4 auf, das aus einem Metall gebildet ist. Benachbart zu seinem freien Ende 25 weist das Steckergehäuse 4 ein Außengewinde 24 auf. An seinem dem freien Ende 25 gegenüberliegenden Schraubende 29 weist das Steckergehäuse 4 einen Abschnitt mit geringerem Durchmesser auf, der ebenfalls ein Außengewinde aufweist. In diesem Schraubende 29 ist ein Kunststoffmaterial 28 dicht und druckfest eingegossen und umgibt elektrische Zuleitungen 27. Diese erstrecken sich durch das eingegossene Kunststoffmaterial 28 bis zu Steckerstiften 6, um diese elektrisch zu kontaktieren. Das Kunststoffmaterial 28 ist im Bereich der entsprechenden Enden der Steckerstifte 6 in einer Isolierhülse 26 als Steckereinsatz 5 aus einem elektrisch isolierenden Kunststoffmaterial angeordnet, wobei die entsprechende Isolierhülse 26 auch die zugeordneten Enden der Steckerstifte 6 umgibt und voneinander elektrisch isoliert.In FIG. 1 an inventive connector 1 is shown in longitudinal section. The connector 1 comprises a plug part 2 and a female connector part 3, which in FIG. 1 are arranged spaced from each other. Plug part 2 has an approximately pot-shaped plug housing 4, which is formed of a metal. Adjacent to its free end 25, the plug housing 4 has an external thread 24. At its free end 25 opposite the screw 29, the connector housing 4 has a portion of smaller diameter, which also has an external thread. In this screw 29, a plastic material 28 is sealed tight and pressure-resistant and surrounds electrical leads 27. These extend through the molded plastic material 28 to plug pins 6 to contact them electrically. The plastic material 28 is in the region of the corresponding ends of the plug pins 6 in an insulating sleeve 26 as a plug insert 5 made of an electrically insulating plastic material arranged, wherein the corresponding insulating sleeve 26 and the associated ends of the connector pins 6 surrounds and electrically isolated from each other.

Die Steckerstifte 6 erstrecken sich von der Isolierhülse 26 in Richtung zum freien Ende 25 des Steckergehäuses 4. Dort enden sie bündig mit dem freien Ende 25.The plug pins 6 extend from the insulating sleeve 26 in the direction of the free end 25 of the plug housing 4. There they end flush with the free end 25th

Der Steckbuchsenteil 3 weist eine Außenhülse 10 als Steckbuchsengehäuse 7 auf. Diese Außenhülse 10 weist auf ihrer Hülseninnenseite 17, siehe auch Figur 2, ein Innengewinde 14 auf, das sich von einem Aufschraubende 15 bis zu einem Metallring 19 erstreckt. An seinem dem Aufschraubende 15 gegenüberliegenden Ende weist die Außenhülse 10 einen radial nach Innen vorstehenden Ringflansch auf, der zur drehbaren Lagerung der Außenhülse 10 relativ zum Buchseneinsatz 8 dient. Dieser Buchseneinsatz 8 ist aus einem Kunststoffmaterial gebildet und sowohl mit Einsteckbuchsen 9 als auch den elektrischen Kontaktierelementen 16 für diese Buchsen dicht und druckfest vergossen. Im Bereich des Metallrings 19, siehe auch Figur 2, weist der Buchseneinsatz 8 an seiner Außenseite 18 einen radial nach außen vorstehenden Ringflansch 22 auf. Mit diesem ist eine Unterseite 23 des Metallrings 19 in Anlage. Der Metallring 19 ist im Wesentlichen T-förmig mit einem horizontalen T-Steg 20 und einem vertikalen T-Steg 21. Der horizontale T-Steg 20 weist die entsprechende Unterseite 23 auf und der vertikale T-Steg 21 ist zur Befestigung am Buchseneinsatz 8 ebenfalls von dem entsprechenden Kunststoffmaterial umgossen.The female connector part 3 has an outer sleeve 10 as a female connector housing 7. This outer sleeve 10 has on its sleeve inner side 17, see also FIG. 2 , an internal thread 14, which extends from a screw-15 to a metal ring 19. At its opposite end of the screw 15, the outer sleeve 10 has a radially inwardly projecting annular flange, which serves for the rotatable mounting of the outer sleeve 10 relative to the female insert 8. This socket insert 8 is formed of a plastic material and sealed with both Einsteckbuchsen 9 and the electrical contacting elements 16 for these sockets and pressure resistant. In the area of the metal ring 19, see also FIG. 2 , The female insert 8 on its outer side 18 on a radially outwardly projecting annular flange 22. With this is a bottom 23 of the metal ring 19 in Appendix. The metal ring 19 is substantially T-shaped with a horizontal T-bar 20 and a vertical T-bar 21. The horizontal T-bar 20 has the corresponding bottom 23 and the vertical T-bar 21 is for attachment to the female insert 8 also encapsulated by the corresponding plastic material.

Zwischen der Hülseninnenseite 17 und der Oberseite des horizontalen T-Stegs 20 ist ein zweiter Spalt 12 und zwischen Außengewinde 24 des Steckerteils 2 bzw. des Steckergehäuses 4 und dem Innengewinde 14 der Außenhülse 10 ist ein erster Spalt 11, siehe wiederum Figur 2, gebildet. Die beiden Spalte werden in beiden Fällen durch entsprechende metallische Oberflächen begrenzt und verhindern einen Durchbruch eines im Inneren des Steckverbinders 1 gegebenenfalls auftretenden Funkens. Dadurch ist der erfindungsgemäße Steckverbinder in explosionsgefährdeten Bereichen einsetzbar, wobei die Spalte 11, 12 die Kriterien für druckfeste Kapselung d oder erhöhte Sicherheit e erfüllen.Between the sleeve inner side 17 and the top of the horizontal T-bar 20 is a second gap 12 and between external thread 24 of the male part 2 and the male housing 4 and the internal thread 14 of the outer sleeve 10 is a first gap 11, see again FIG. 2 , educated. The two gaps are limited in both cases by corresponding metallic surfaces and prevent a breakthrough of a possibly occurring inside the connector 1 spark. As a result, the connector according to the invention can be used in potentially explosive areas, wherein the gaps 11, 12 meet the criteria for flameproof enclosure d or increased security e.

Innerhalb des Buchseneinsatzes 8 sind im Vergleich zu den Steckerstiften 6 in entsprechender Anzahl und Anordnung Einsteckbuchsen 9 angeordnet. In diesen münden Innenbohrungen 31 des Buchseneinsatzes 8, die in Richtung zu den Steckerstiften 6 geöffnet sind.Inside the female insert 8 plug-in sockets 9 are arranged in comparison to the connector pins 6 in a corresponding number and arrangement. In these open internal holes 31 of the female insert 8, which are open in the direction of the connector pins 6.

In Figur 2 sind die Steckerstifte 6 zumindest in diese Innenbohrungen 31 eingesetzt, ohne dass bereits ein elektrischer Kontakt zwischen Steckerstiften 6 und Einsteckbuchsen 9 hergestellt ist. In dieser teilweise eingesteckten Stellung von Steckerteil 2 und Steckbuchsenteil 3 sind die entsprechenden Spalte 11 und 12 bereits gebildet, ohne dass schon ein Strom fließt.In FIG. 2 the plug pins 6 are inserted at least in these inner holes 31, without an electrical contact between the plug pins 6 and plug-in sockets 9 is already made. In this partially inserted position of the plug part 2 and socket part 3, the corresponding column 11 and 12 are already formed, without already flowing a current.

Die Verbindung von Steckerteil 2 und Steckbuchsenteil 3 erfolgt durch die als Schraubhülse 13 ausgebildete Außenhülse 10, die mittels ihres Innengewindes 14 auf das Außengewinde 24 des Steckergehäuses 4 aufgeschraubt ist. Erst beim weiteren Aufschrauben der Schraubhülse 3 auf Steckergehäuse 4 folgt eine weitere Annäherung von Steckerstiften 6 und Einsteckbuchsen 9 bis schließlich die Enden 30 der Steckerstifte 6 in Kontakt mit den metallischen Einsteckbuchsen 9 zur Herstellung einer elektrischen Verbindung geraten. Nach vollständigem Aufschrauben sind dann die Steckerstifte soweit wie möglich in die Einsteckbuchsen 9 eingeschoben. Das Einstecken kann bis zur Anlage des freien Endes 25 mit dem radial nach außen vorstehenden Ringflansch 22 bzw. dem Metallring 19 erfolgen. Dazu erstreckt sich das Innengewinde 14 der Schraubhülse 13 entsprechend vom Aufschraubende 15 bis in etwa zum Metallring 19.The connection of the plug part 2 and female connector part 3 is carried out by the sleeve 13 formed as an outer sleeve 10, which is screwed by means of its internal thread 14 on the external thread 24 of the plug housing 4. Only upon further screwing the screw 3 on the connector housing 4 is followed by a further approximation of connector pins 6 and plug-in sockets 9 until finally the ends 30 of the connector pins 6 in contact with the metallic plug-in sockets 9 for making an electrical connection. After complete screwing the plug pins are then inserted as far as possible in the plug-in sockets 9. The insertion can be done until the contact of the free end 25 with the radially outwardly projecting annular flange 22 and the metal ring 19. For this purpose, the internal thread 14 of the threaded sleeve 13 extends correspondingly from the screwed-15 to approximately the metal ring 19th

Der Buchseneinsatz 8 ist ebenfalls aus einem Kunststoffmaterial gebildet, das dicht und druckfest um die Einsteckbuchsen 9 und um die zugehörigen elektrischen Kontaktierelemente 16 in Form beispielsweise eines Kabels gegossen ist.The female insert 8 is also formed from a plastic material which is sealed and pressure-tight around the plug-in sockets 9 and cast around the associated electrical contacting elements 16 in the form of, for example, a cable.

Erfindungsgemäß besteht die Möglichkeit, auch ohne Spannungsfreischaltung mittels des erfindungsgemäßen explosionsgeschützten Steckverbinders eine elektrische Verbindung zwischen Steckerteil und Steckbuchsenteil insbesondere zu trennen, ohne dass Fachkräfte zum Trennen solcher Verbindungen herangezogen werden müssen. Dazu ist sichergestellt, dass vor Herstellen bzw. nach Trennen der elektrischen Verbindungen zwischen Steckerstiften und Einsteckbuchsen bereits eine Verbindung zwischen den entsprechenden Gehäusen der Steckverbinderteile hergestellt ist oder noch vorhanden ist, wobei nur über den ersten und den zweiten Spalt ein Kontakt vom Inneren des Steckverbinders zur Außenseite des Steckverbinders vorliegt, während alle weiteren Teile des Steckverbinders dicht und druckfest durch entsprechendes Kunststoffmaterial gekapselt sind.According to the invention, it is possible to disconnect an electrical connection between the plug part and the socket part in particular without disconnecting the voltage by means of the explosion-proof plug connector according to the invention, without the need for skilled workers to disconnect such connections. For this purpose, it is ensured that a connection between the corresponding housings of the connector parts is already made or still present before or after disconnecting the electrical connections between pins and receptacles, wherein only via the first and the second gap a contact from the interior of the connector to Outside of the connector is present, while all other parts of the connector are tight and flameproof encapsulated by appropriate plastic material.

Ein Zusammensetzen des Steckverbinders erfolgt dabei im ersten Schritt mittels zweier Gewinde, die ineinander verschraubt werden. Durch dieses Verschrauben entsteht eine druckfeste Kapselung des Raumes, in dem die Kontaktelemente angeordnet sind. Durch Weiterdrehen erfolgt die Kontaktierung an Stift und Buchsen. Dabei eventuell entstehende Lichtbögen können die gegebenenfalls im Inneren der Kapselung vorhandenen Gase entzünden, aber durch die definierten Spalte und die mechanische Stabilität der druckfesten Kapselung wird die Zündung der umgebenden gashaltigen Atmosphäre verhindert. An assembly of the connector takes place in the first step by means of two threads which are screwed together. By screwing creates a flameproof enclosure of the room in which the contact elements are arranged. By further rotation, the contact is made to pin and sockets. The resulting arcing can ignite the gas possibly present in the interior of the enclosure, but the defined gap and the mechanical stability of the flameproof enclosure prevent the ignition of the surrounding gas-containing atmosphere.

Claims (17)

  1. An explosion-proof connector (1) comprising a plug part (2) and a socket part (3), the plug part (2) comprising a plug housing (4) with at least two plug pins (6) arranged in a plug insert (5), and the socket part (3) comprising a socket housing (7) with matching socket contacts (9) arranged in a socket insert (8),
    characterized in
    that the socket housing (7) comprises an outer sleeve (10) which is detachably connectable to the plug housing (4), a first gap (11) being formed between outer sleeve (10) and plug housing (4) and a second gap (12) between outer sleeve (10) and socket insert (8) already before electrically contacting plug pins (6) and socket contacts (9) for realizing type of protection (d), flameproof enclosure, or type of protection (e), increased safety, respectively, with outer sleeve (10) and plug housing (4) comprising an inner thread (14) and outer thread (24), respectively, and wherein the socket insert (8) comprises a metal ring (19) on its outside (18) facing the sleeve inside (17) and the second gap (12) is formed between said ring and the sleeve inside (17).
  2. The explosion-proof connector according to claim 1, characterized in that the outer sleeve (10) is configured as a screw sleeve (13) with the inner thread (14) as viewed from its screw-on end (15).
  3. The explosion-proof connector according to claim 1 or 2,
    characterized in
    that the outer sleeve (10) is part of the socket housing (7) and supported to be rotatable relative to the socket insert (8).
  4. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the socket insert (8) is made from a plastic material and is cast in tight and flameproof fashion around socket contacts (9) and the electrical contacting elements (16) thereof.
  5. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the socket insert (8) is made from a plastic material and the socket contacts (9) are movably supported therein with formation of an explosion-proof gap.
  6. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the plug insert (5) is made from a plastic material and the plug pins (6) are movably supported therein with formation of an explosion-proof gap.
  7. The explosion-proof connector according to claim 1,
    characterized in
    that the socket insert (8) in the area of the metal ring (19) comprises a radially outwardly projecting annular flange (22) on which a horizontal T-web (20) rests with its bottom side (23) oriented away from the sleeve inside (17).
  8. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the inner thread (14) of the screw sleeve (13) extends from the screw-on end (15) to the metal ring (19).
  9. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the plug housing (4) is configured to be substantially cup-shaped with outer thread (24) as viewed from the free end (25).
  10. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that plug housing (4) and outer sleeve (10) are made from metal at least in the area of the thread (14, 24).
  11. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that an insulating sleeve (26) is arranged as plug insert (5) at least between plug housing (4) and plug pins (6).
  12. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that a plastic material (26) is cast in tight and flameproof fashion between insulating sleeve (26) and electric feed lines (27) guided to the plug pins (6).
  13. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the plug housing (4) comprises a screw end (29) opposite its free end (26), through which the electric feed lines (27) are passed and cast with the plastic material (28) in tight and flameproof fashion.
  14. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the free end (25) of the plug housing (4) ends flush with ends (30) of the plug pins (6).
  15. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the socket insert (8) projects from the screw-on end (15) of the screw sleeve(13).
  16. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the thread-carrying parts are made from a metallic material and the inner parts from an insulating plastic material.
  17. The explosion-proof connector according to any one of the preceding claims,
    characterized in
    that the complete connector is fabricated as an all-plastic type.
EP06762532.7A 2005-07-12 2006-07-11 Explosion-proof plug-in connector Active EP1925060B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005010927U DE202005010927U1 (en) 2005-07-12 2005-07-12 Explosion-proof connector
PCT/EP2006/006784 WO2007006554A1 (en) 2005-07-12 2006-07-11 Explosion-proof plug-in connector

Publications (2)

Publication Number Publication Date
EP1925060A1 EP1925060A1 (en) 2008-05-28
EP1925060B1 true EP1925060B1 (en) 2016-05-25

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ID=37074825

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US (1) US7794252B2 (en)
EP (1) EP1925060B1 (en)
KR (1) KR101229665B1 (en)
CN (1) CN101223675B (en)
BR (1) BRPI0613513B1 (en)
CA (1) CA2614990C (en)
DE (1) DE202005010927U1 (en)
NO (1) NO339249B1 (en)
RU (1) RU2407119C2 (en)
WO (1) WO2007006554A1 (en)

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US6382990B1 (en) * 1999-11-19 2002-05-07 Societe D'exploitation Des Procedes Marechal (Sepm) Electric connection base plate in particular for explosible environment and method for making same
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019057239A1 (en) 2017-09-22 2019-03-28 Harting Electric Gmbh & Co. Kg HIGH CIRCUIT CONNECTOR WITH INSULATING SLEEVE
US10992080B2 (en) 2017-09-22 2021-04-27 Harting Electric Gmbh & Co. Kg High-current connector comprising an insulating bush
US10950966B2 (en) 2018-10-26 2021-03-16 American Mine Research, Inc. Safety stab technology

Also Published As

Publication number Publication date
US7794252B2 (en) 2010-09-14
BRPI0613513B1 (en) 2017-10-31
EP1925060A1 (en) 2008-05-28
WO2007006554A8 (en) 2009-04-16
KR101229665B1 (en) 2013-02-04
CN101223675B (en) 2011-06-22
KR20080034854A (en) 2008-04-22
US20080311774A1 (en) 2008-12-18
NO339249B1 (en) 2016-11-21
RU2407119C2 (en) 2010-12-20
CA2614990C (en) 2013-09-10
NO20076489L (en) 2008-02-08
CN101223675A (en) 2008-07-16
RU2008103984A (en) 2009-08-20
CA2614990A1 (en) 2007-01-18
WO2007006554A1 (en) 2007-01-18
BRPI0613513A2 (en) 2011-01-11
DE202005010927U1 (en) 2006-11-16

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