EP2208261B1 - Device for the sparkless disconnection of a solenoid - Google Patents

Device for the sparkless disconnection of a solenoid Download PDF

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Publication number
EP2208261B1
EP2208261B1 EP07857118A EP07857118A EP2208261B1 EP 2208261 B1 EP2208261 B1 EP 2208261B1 EP 07857118 A EP07857118 A EP 07857118A EP 07857118 A EP07857118 A EP 07857118A EP 2208261 B1 EP2208261 B1 EP 2208261B1
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EP
European Patent Office
Prior art keywords
plug
spring
connection
section
spring assembly
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.)
Not-in-force
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EP07857118A
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German (de)
French (fr)
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EP2208261A1 (en
Inventor
Ralf Höhn
Heiko Kühbauch
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Festo SE and Co KG
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Festo SE and Co KG
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Publication of EP2208261A1 publication Critical patent/EP2208261A1/en
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    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/6608—Structural association with built-in electrical component with built-in single component
    • H01R13/6641—Structural association with built-in electrical component with built-in single component with diode
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7036—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit

Definitions

  • the invention relates to a device for spark-free unplugging a via two electrical connector elements of a connector assembly with two DC voltage contacts electrically connectable solenoid.
  • An object of the present invention is to provide a device of the type mentioned, by the use of non-provided with protective diodes magnetic coils or devices provided with magnetic coils is also possible in explosion-proof environment and it is ensured that when unplugging nevertheless no sparking.
  • the protective diode is not arranged on the magnetic coil or on the device provided with the magnetic coil but in the plug-in receptacle for the connector elements of the magnetic coil. It is ensured that the separation of the connection of one of the connector elements with the associated DC voltage contact, the protective diode still connects the two connector elements of the magnetic coil, so that the negative voltage pulse is short-circuited by induction, without a sparking can occur.
  • the diode also acts as an overvoltage limit during the regular shutdown process. It can thus magnetic coils be plugged with and without protection diode, so that appropriate considerations, which solenoid can be used, are not required. It can be used simple and inexpensive magnetic coils or devices provided with magnetic coils without protective circuit, so standard magnetic coils, especially in environments where explosion protection is required or mandatory.
  • the second portion of the first spring assembly is electrically fixed to the first DC voltage contact and lies in the Aussteckraum behind the second portion elastically on the first connector element.
  • the two subregions of the first spring arrangement are expediently designed as spring tongues, which also applies in particular to the second spring arrangement.
  • simple and inexpensive spring arrangements can be used.
  • the first spring arrangement is formed as a two-stage, compressible by the first connector element when inserting pressure spring assembly, wherein the first portion rests as a first stage on the first connector element and the second portion as a second stage for electrical connection to the first portion and the first DC voltage contact is formed from a predetermined spring pressure.
  • the first portion is suitably designed as a helical spring and the second portion as a leaf or plate spring.
  • the first portion is suitably designed as a helical spring and the second portion as a leaf or plate spring.
  • the second spring arrangement is expediently designed in the second embodiment as compressible by the second connector element when inserting compression spring assembly and has spring properties that ensure release of the system on the second connector element when unplugging the electrical connection of the first spring assembly from the first DC voltage contact.
  • the two plug-in connection elements are expediently arranged on the housing of a magnetic valve in which the magnetic coil is located. In principle, a cable connection is possible.
  • a plug-in receptacle of the plug connection arrangement for receiving the plug connection elements can be arranged on a housing or on an electrical, connectable with a cable coupling element.
  • a schematically illustrated solenoid valve 10 includes a magnetic coil 11, the electrical connections with two connector elements 12, 13 of a connector assembly 14 are connected.
  • the two plug connection elements 12, 13 can be arranged either on the housing of the solenoid valve 10 or on a plug which is connected via lines to the solenoid valve 10.
  • the solenoid coil 11 may also be arranged or integrated in another electrical device, for example in an electromagnet, a relay or the like.
  • the plug receptacle 15 may be arranged on or in an electrical device or formed as an electrical counter-coupling element or mating connector, which is mounted on an electrical cable 16.
  • the electrical cable 16 extends within the same and is connected in each case to an unillustrated electrical DC power source.
  • two DC voltage contacts 19, 20 are arranged in the plug receptacle 15, wherein the DC voltage contact 19 is connected to the negative pole and the DC voltage contact 20 to the positive pole of the DC voltage source.
  • a two-stage compression spring assembly 21 is arranged, the first portion 22 is formed as a first step as a helical spring and the first insertion 17 faces, while the second portion 23 is formed as a second stage as a leaf or plate spring and the negative DC voltage contact 19th bridged.
  • a second, designed as a helical spring compression spring arrangement 24 is arranged, which faces the second insertion opening 18.
  • the first two-stage compression spring assembly 21 and its second portion 23 is connected via a protective diode serving as a diode 25 to the positive DC voltage contact 20 and poled so that it locks when applying the DC voltage.
  • a protective diode serving as a diode 25 to the positive DC voltage contact 20 and poled so that it locks when applying the DC voltage.
  • a diode 25 a plurality of diodes may also be connected in parallel and / or series connection.
  • FIG. 1 a state is shown in which the plug connection elements 12, 13 are inserted into the plug receptacle 15.
  • the first compression spring assembly 21 is compressed by the first connector element 12, that the second portion 23 comes into contact with the negative DC voltage contact 19, which mechanically bridged in the unloaded state, that is not electrically connected to the second portion 23 of the first compression spring assembly 21.
  • the installation of the two plug-in connection elements 12, 13 on the two compression spring arrangements 21, 24 thus leads to that the magnetic coil 11 is acted upon by the DC voltage.
  • FIG. 2 is a state shown in which the connector elements 12, 13 are already partially pulled out, that occupy a position during the Aussteckvorgangs.
  • the two compression spring assemblies 21, 24 are still at the two connector elements 12, 13, but the spring force has already been reduced so that the second portion 23 of the first compression spring assembly 21 has lifted from the first DC voltage contact 19 and no longer connected to this consists.
  • the diode 25 continues to connect the two connector elements 12, 13 via the two compression spring assemblies 21, 24.
  • an oppositely directed induction voltage in the solenoid 11 is formed, which can now be degraded via the diode 25, so that no Abschaltfunken arise and so an operation in explosion-proof environment is possible.
  • FIG. 3 is the fully unplugged state shown in which the two connector elements 12, 13 have no contact with the compression spring assemblies 21, 24 more.
  • the spring force, in particular of the first compression spring arrangement 21, must be adjusted such that the first partial region 23 of the first compression spring arrangement 21 designed as a leaf or plate spring is pressed down in such a way that it comes into contact with the negative direct voltage contact 19. If the first subregion 22 of the compression spring arrangement 21 has a harder spring characteristic than the second subregion 23, a relatively early contact takes place when the plug connection elements 12, 13 are plugged in, and a relatively late detachment occurs during disengagement From the first DC voltage contact 19, while this is the case in reverse properties in the reverse manner, ie at a first portion 22 with softer spring characteristic over the second portion 23 is a relatively late contact during insertion and a relatively early contact separation during unplugging.
  • the second compression spring assembly 24 is then each formed with appropriate dimensioning and spring characteristics, that is, in the illustrated embodiment, the second compression spring assembly 24 has the same or similar spring characteristics as the first portion 22 of the first compression spring assembly 21.
  • first compression spring arrangement 21 and the second compression spring arrangement 24 can also be arranged reversed with respect to the two poles, wherein two-stage compression spring arrangements can in principle also be provided at both poles.
  • the essential thing is merely that when unplugging the connector elements 12, 13 is still a contact with the two terminals of the diode 25 after the connection with one of the DC voltage contacts 19, 20 has been disconnected.
  • the two spring tongues 26, 27 form a first spring assembly 29, wherein the spring tongue 26 is connected as a first portion of the first spring assembly 29 with a terminal of the diode 25 and the spring tongue 27 as the second portion of the first spring assembly 29 with the negative DC voltage contact 19.
  • These two spring tongues 26, 27 are in the insertion direction one behind the other laterally on the first connector element 12, wherein the system of the spring tongue 26 is further removed from the negative DC voltage contact 19, as the system of the second spring tongue 27th
  • the spring tongue 28 forms the second spring arrangement 30, which rests in the inserted state of the connector elements 12, 13 on the second connector element 13 in height corresponding to the spring tongue 26.
  • a modified connector assembly 14 ' instead of the connector assembly 14 of the first embodiment, a modified connector assembly 14 'and instead of the socket 15 of the first embodiment, a modified socket 15'.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum funkenfreien Ausstecken einer über zwei elektrische Steckverbindungselemente einer Steckverbindungsanordnung mit zwei Gleichspannungskontakten elektrisch verbindbaren Magnetspule.The invention relates to a device for spark-free unplugging a via two electrical connector elements of a connector assembly with two DC voltage contacts electrically connectable solenoid.

Bei der Trennung von spannungsführenden Magnetspulen, beispielsweise Ventilmagnetspulen von ihren elektrischen Anschlüssen entstehen aufgrund der Induktionsspannung Funken, die in explosionsgeschützter Umgebung nicht auftreten dürfen. Diese Problematik tritt z.B. auch beim Explosionsschutz in den Kategorien 2 und 3 auf. Um solche Funken zu vermeiden, ist es bekannt, eine Schutzdiode parallel zur Magnetspule zu schalten. Über diese Diode wird beim Ausstecken die zur Polarität der Anschlüsse entgegengesetzt gerichtete Induktionsspannung abgebaut bzw. kurzgeschlossen, so dass keine Energie zur Funkenbildung mehr verbleibt. Der Nachteil dieser bekannten Anordnung besteht darin, dass die Schuztdiode fest mit der Magnetspule verbunden bzw. im die Magnetspule enthaltenden Gerät integriert ist, beispielsweise in einem Magnetventil. Da man insbesondere bei der Massenproduktion üblicherweise nicht weiß, in welcher Umgebung das Gerät später arbeiten soll, wären erhebliche Kosten und ein erheblicher Aufwand nötig, um in allen Geräten prophylaktisch eine Schutzdiode zu integrieren. Da nur sehr wenige Geräte später in einer explosionsgeschützten Umgebung eingesetzt werden, wäre ein solcher Aufwand auch nicht zu vertreten. Andererseits bedeutet es auch einen nicht geringen Aufwand, Kleinserien von Geräten speziell für explosionsgeschützte Umgebungen herzustellen. Ein weiteres Problem besteht noch darin, dass man beim Austausch eines Geräts in einer explosionsgeschützten Umgebung manchmal nicht mit Sicherheit feststellen kann, ob das neue Gerät ebenfalls eine Schutzdiode enthält.In the separation of live magnetic coils, such as valve solenoid coils of their electrical connections due to the induction voltage generated sparks, which may not occur in explosion-proof environment. This problem also occurs, for example, in explosion protection in categories 2 and 3. In order to avoid such sparks, it is known to connect a protective diode in parallel with the magnetic coil. About this diode when unplugging the polarity of the terminals oppositely directed induction voltage is reduced or short-circuited, so that no energy for sparking remains. The disadvantage of this known arrangement is that the Schuztdiode is firmly connected to the solenoid or integrated in the magnetic coil containing device, for example in a solenoid valve. Since you usually do not know in particular in mass production, in which environment the device should work later, considerable costs and considerable effort would be necessary to prophylactically integrate a protective diode in all devices. Since only very few devices will be used later in an explosion-proof environment, such would be one Expenditure also not to represent. On the other hand, it also means no small effort to produce small series of devices especially for explosion-proof environments. Another problem is that when replacing a device in an explosion-proof environment it is sometimes impossible to determine with certainty whether the new device also contains a protection diode.

Hinsichtlich dieses Stand der Technik wird auf US 7,063,570 B1 verwiesen, welche die Merkmale des Oberbegriffs von Anspruch 1 zeigt.With regard to this prior art is on US Pat. No. 7,063,570 B1 which shows the features of the preamble of claim 1.

Bei mit einer Schutzdiode versehenen Magnetspulen muss darüber hinaus sichergestellt werden, dass die Anschlusspolarität stimmt, anderenfalls würde die Schutzdiode zerstört.In addition, with magnetic coils provided with a protective diode, it must be ensured that the terminal polarity is correct, otherwise the protective diode would be destroyed.

Eine Aufgabe der vorliegenden Erfindung besteht darin, eine Vorrichtung der eingangs genannten Gattung zu schaffen, durch die ein Einsatz von nicht mit Schutzdioden versehenen Magnetspulen oder mit Magnetspulen versehenen Geräten auch in explosionsgeschützter Umgebung möglich ist und sichergestellt ist, dass beim Ausstecken dennoch keine Funkenbildung entsteht.An object of the present invention is to provide a device of the type mentioned, by the use of non-provided with protective diodes magnetic coils or devices provided with magnetic coils is also possible in explosion-proof environment and it is ensured that when unplugging nevertheless no sparking.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a device having the features of claim 1.

In vorteilhafter Weise ist die Schutzdiode nicht an der Magnetspule oder an dem mit der Magnetspule versehenem Gerät angeordnet sondern in der Steckaufnahme für die Steckverbindungselemente der Magnetspule. Dabei ist sichergestellt, dass zur Trennung der Verbindung eines der Steckverbindungselemente mit dem zugeordneten Gleichspannungskontakt die Schutzdiode noch die beiden Steckverbindungselemente der Magnetspule verbindet, so dass der negative Spannungsimpuls durch Induktion kurzgeschlossen wird, ohne dass eine Funkenbildung entstehen kann. Die Diode wirkt zudem als Überspannungsbegrenzung beim regulären Abschaltvorgang. Es können somit Magnetspulen mit und ohne Schutzdiode eingesteckt werden, so dass entsprechende Überlegungen, welche Magnetspule man verwenden kann, nicht erforderlich sind. Es können einfache und preiswerte Magnetspulen bzw. mit Magnetspulen versehene Geräte ohne Schutzbeschaltung, also Standard-Magnetspulen verwendet werden, insbesondere auch in Umgebungen, in denen ein Explosionsschutz erforderlich oder vorgeschrieben ist.Advantageously, the protective diode is not arranged on the magnetic coil or on the device provided with the magnetic coil but in the plug-in receptacle for the connector elements of the magnetic coil. It is ensured that the separation of the connection of one of the connector elements with the associated DC voltage contact, the protective diode still connects the two connector elements of the magnetic coil, so that the negative voltage pulse is short-circuited by induction, without a sparking can occur. The diode also acts as an overvoltage limit during the regular shutdown process. It can thus magnetic coils be plugged with and without protection diode, so that appropriate considerations, which solenoid can be used, are not required. It can be used simple and inexpensive magnetic coils or devices provided with magnetic coils without protective circuit, so standard magnetic coils, especially in environments where explosion protection is required or mandatory.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Vorrichtung möglich.The measures listed in the dependent claims advantageous refinements and improvements of claim 1 device are possible.

In einer vorteilhaften ersten Ausführungsvariante ist der zweite Teilbereich der ersten Federanordnung elektrisch fest mit dem ersten Gleichspannungskontakt verbunden und liegt in der Aussteckrichtung hinter dem zweiten Teilbereich elastisch am ersten Steckverbindungselement an. Dabei sind die beiden Teilbereiche der ersten Federanordnung zweckmäßigerweise als Federzungen ausgebildet, was insbesondere auch für die zweite Federanordnung gilt. Hierbei können einfache und kostengünstige Federanordnungen eingesetzt werden.In an advantageous first embodiment, the second portion of the first spring assembly is electrically fixed to the first DC voltage contact and lies in the Aussteckrichtung behind the second portion elastically on the first connector element. The two subregions of the first spring arrangement are expediently designed as spring tongues, which also applies in particular to the second spring arrangement. Here, simple and inexpensive spring arrangements can be used.

Bei einer vorteilhaften zweiten Ausführungsvariante ist die erste Federanordnung als zweistufige, durch das erste Steckverbindungselement beim Einstecken zusammendrückbare Druckfederanordnung ausgebildet, wobei der erste Teilbereich als erste Stufe am ersten Steckverbindungselement anliegt und der zweite Teilbereich als zweite Stufe zur elektrischen Verbindung mit dem ersten Teilbereich und dem ersten Gleichspannungskontakt ab einem vorgebbaren Federdruck ausgebildet ist. Durch Optimierung der Federeigenschaften kann festgelegt werden, wie lange die Diode Zeit für den Kurzschluss des negativen Spannungsimpulses hat, wozu lediglich einige µsec benötigt werden.In an advantageous second embodiment variant, the first spring arrangement is formed as a two-stage, compressible by the first connector element when inserting pressure spring assembly, wherein the first portion rests as a first stage on the first connector element and the second portion as a second stage for electrical connection to the first portion and the first DC voltage contact is formed from a predetermined spring pressure. By optimizing the spring characteristics, it is possible to determine how long the diode has time for the short-circuiting of the negative voltage pulse, for which only a few μsec is needed.

Der erste Teilbereich ist zweckmäßigerweise als Schraubenfeder und der zweite Teilbereich als Blatt- oder Tellerfeder ausgebildet. Prinzipiell ist es auch möglich, beide Teilbereiche als Schraubenfeder oder beide Teilbereiche als Blatt- oder Tellerfedern auszubilden.The first portion is suitably designed as a helical spring and the second portion as a leaf or plate spring. In principle, it is also possible to form both partial areas as a helical spring or both partial areas as leaf or plate springs.

Die zweite Federanordnung ist bei der zweiten Ausführungsvariante zweckmäßigerweise als durch das zweite Steckverbindungselement beim Einstecken zusammendrückbare Druckfederanordnung ausgebildet und besitzt Federeigenschaften, die ein Lösen der Anlage am zweiten Steckverbindungselement beim Ausstecken nach dem Lösen der elektrischen Verbindung der ersten Federanordnung vom ersten Gleichspannungskontakt gewährleisten.The second spring arrangement is expediently designed in the second embodiment as compressible by the second connector element when inserting compression spring assembly and has spring properties that ensure release of the system on the second connector element when unplugging the electrical connection of the first spring assembly from the first DC voltage contact.

Die beiden Steckverbindungselemente sind zweckmäßigerweise am Gehäuse eines Magnetventils angeordnet, in dem sich die Magnetspule befindet. Prinzipiell ist auch eine Kabelverbindung möglich.The two plug-in connection elements are expediently arranged on the housing of a magnetic valve in which the magnetic coil is located. In principle, a cable connection is possible.

Eine Steckaufnahme der Steckverbindungsanordnung zur Aufnahme der Steckverbindungselemente kann an einem Gehäuse oder an einem elektrischen, mit einem Kabel verbindbaren Kopplungselement angeordnet sein.A plug-in receptacle of the plug connection arrangement for receiving the plug connection elements can be arranged on a housing or on an electrical, connectable with a cable coupling element.

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Figur 1
ein mit einer Magnetspule versehenes Gerät, dessen Steckverbindungselemente in eine Steckaufnahme einer Steckverbindungsanordnung eingesteckt sind als erstes Ausführungsbeispiel der Erfindung,
Figur 2
dieselbe Anordnung während des Aussteckvorgangs bei dem die Verbindung zum negativen Pol einer Versorgungsspannungsquelle bereits unterbrochen ist,
Figur 3
dieselbe Anordnung im ausgesteckten Zustand und
Figur 4
eine ähnliche Anordnung im eingesteckten Zustand als zweites Ausführungsbeispiel der Erfindung.
Two embodiments of the invention are illustrated in the drawing and explained in more detail in the following description. Show it:
FIG. 1
a device provided with a magnet coil whose plug connection elements are plugged into a plug receptacle of a plug connection arrangement as a first exemplary embodiment of the invention,
FIG. 2
the same arrangement during the Aussteckvorgangs in which the connection to the negative pole of a supply voltage source is already interrupted,
FIG. 3
the same arrangement in the unplugged state and
FIG. 4
a similar arrangement in the inserted state as a second embodiment of the invention.

Bei dem in den Figuren 1 bis 3 dargestellten ersten Ausführungsbeispiel enthält ein schematisch dargestelltes Magnetventil 10 eine Magnetspule 11, deren elektrische Anschlüsse mit zwei Steckverbindungselementen 12, 13 einer Steckverbindungsanordnung 14 verbunden sind. Die beiden Steckverbindungselemente 12, 13 können entweder am Gehäuse des Magnetventils 10 oder an einem Stecker angeordnet sein, der über Leitungen mit dem Magnetventil 10 verbunden ist. Anstelle eines Magnetventils 10 kann die Magnetspule 11 auch in einem anderen elektrischen Gerät angeordnet bzw. integriert sein, beispielsweise in einem Elektromagneten, einem Relais oder dergleichen.In the in the FIGS. 1 to 3 illustrated first embodiment, a schematically illustrated solenoid valve 10 includes a magnetic coil 11, the electrical connections with two connector elements 12, 13 of a connector assembly 14 are connected. The two plug connection elements 12, 13 can be arranged either on the housing of the solenoid valve 10 or on a plug which is connected via lines to the solenoid valve 10. Instead of a solenoid valve 10, the solenoid coil 11 may also be arranged or integrated in another electrical device, for example in an electromagnet, a relay or the like.

Die Steckverbindungselemente 12, 13 bilden zusammen mit einer elektrischen Steckaufnahme 15 die Steckverbindungsanordnung 14. Die Steckaufnahme 15 kann an oder in einem elektrischen Gerät angeordnet oder als elektrisches Gegenkopplungselement bzw. Gegenkopplungsstecker ausgebildet sein, der an einem elektrischen Kabel 16 anmontiert ist. Im Falle der Anordnung an oder in einem elektrischen Gerät verläuft das elektrische Kabel 16 innerhalb desselben und ist in jedem Falle an eine nicht dargestellte elektrische Gleichspannungsversorgungsquelle angeschlossen ist.The plug-in connection elements 12, 13 together with an electrical plug-in receptacle 15, the plug connection arrangement 14. The plug receptacle 15 may be arranged on or in an electrical device or formed as an electrical counter-coupling element or mating connector, which is mounted on an electrical cable 16. In the case of the arrangement on or in an electrical device, the electrical cable 16 extends within the same and is connected in each case to an unillustrated electrical DC power source.

Gegenüber den beiden Einstecköffnungen 17, 18 zur Aufnahme der beiden Steckverbindungselemente 12, 13 sind zwei Gleichspannungskontakte 19, 20 in der Steckaufnahme 15 angeordnet, wobei der Gleichspannungskontakt 19 mit dem negativen Pol und der Gleichspannungskontakt 20 mit dem positiven Pol der Gleichspannungsquelle verbunden ist. Über dem negativen Gleichspannungskontakt 19 ist eine zweistufige Druckfederanordnung 21 angeordnet, deren erster Teilbereich 22 als erste Stufe als Schraubenfeder ausgebildet und der ersten Einstecköffnung 17 zugewandt ist, während der zweite Teilbereich 23 als zweite Stufe als Blatt- oder Tellerfeder ausgebildet ist und den negativen Gleichspannungskontakt 19 überbrückt.Opposite the two insertion openings 17, 18 for receiving the two plug connection elements 12, 13, two DC voltage contacts 19, 20 are arranged in the plug receptacle 15, wherein the DC voltage contact 19 is connected to the negative pole and the DC voltage contact 20 to the positive pole of the DC voltage source. About the negative DC voltage contact 19, a two-stage compression spring assembly 21 is arranged, the first portion 22 is formed as a first step as a helical spring and the first insertion 17 faces, while the second portion 23 is formed as a second stage as a leaf or plate spring and the negative DC voltage contact 19th bridged.

Am positiven Gleichspannungskontakt 20 ist eine zweite, als Schraubenfeder ausgebildete Druckfederanordnung 24 angeordnet, die der zweiten Einstecköffnung 18 zugewandt ist.At the positive DC voltage contact 20, a second, designed as a helical spring compression spring arrangement 24 is arranged, which faces the second insertion opening 18.

Die erste zweistufige Druckfederanordnung 21 bzw. deren zweiter Teilbereich 23 ist über eine als Schutzdiode dienende Diode 25 mit dem positiven Gleichspannungskontakt 20 verbunden und so gepolt, dass sie beim Anlegen der Gleichspannung sperrt. Anstelle einer Diode 25 können auch mehrere Dioden in Parallel- und/oder Reihenschaltung treten.The first two-stage compression spring assembly 21 and its second portion 23 is connected via a protective diode serving as a diode 25 to the positive DC voltage contact 20 and poled so that it locks when applying the DC voltage. Instead of a diode 25, a plurality of diodes may also be connected in parallel and / or series connection.

In Figur 1 ist ein Zustand dargestellt, in dem die Steckverbindungselemente 12, 13 in die Steckaufnahme 15 eingesteckt sind. Dabei wird die erste Druckfederanordnung 21 so durch das erste Steckverbindungselement 12 komprimiert, dass deren zweiter Teilbereich 23 in Kontakt mit dem negativen Gleichspannungskontakt 19 gelangt, der im unbelasteten Zustand mechanisch überbrückt, also nicht mit dem zweiten Teilbereich 23 der ersten Druckfederanordnung 21 elektrisch verbunden ist. Die Anlage der beiden Steckverbindungselemente 12, 13 an den beiden Druckfederanordnungen 21, 24 führt somit dazu, dass die Magnetspule 11 von der Gleichspannung beaufschlagt wird.In FIG. 1 a state is shown in which the plug connection elements 12, 13 are inserted into the plug receptacle 15. In this case, the first compression spring assembly 21 is compressed by the first connector element 12, that the second portion 23 comes into contact with the negative DC voltage contact 19, which mechanically bridged in the unloaded state, that is not electrically connected to the second portion 23 of the first compression spring assembly 21. The installation of the two plug-in connection elements 12, 13 on the two compression spring arrangements 21, 24 thus leads to that the magnetic coil 11 is acted upon by the DC voltage.

In Figur 2 ist ein Zustand dargestellt, in dem die Steckverbindungselemente 12, 13 schon zum Teil herausgezogen sind, also eine Position während des Aussteckvorgangs einnehmen. In diesem Zustand liegen die beiden Druckfederanordnungen 21, 24 noch an den beiden Steckverbindungselementen 12, 13 an, jedoch hat sich die Federkraft schon so reduziert, dass der zweite Teilbereich 23 der ersten Druckfederanordnung 21 vom ersten Gleichspannungskontakt 19 abgehoben hat und keine Verbindung mehr zu diesem besteht. Die Diode 25 verbindet jedoch weiterhin die beiden Steckverbindungselemente 12, 13 über die beiden Druckfederanordnungen 21, 24. Durch die Trennung vom Stromkreis wird eine entgegengesetzt gerichtete Induktionsspannung in der Magnetspule 11 gebildet, die nun über die Diode 25 abgebaut werden kann, so dass keine Abschaltfunken entstehen und so ein Betrieb in explosionsgeschützter Umgebung möglich ist.In FIG. 2 is a state shown in which the connector elements 12, 13 are already partially pulled out, that occupy a position during the Aussteckvorgangs. In this state, the two compression spring assemblies 21, 24 are still at the two connector elements 12, 13, but the spring force has already been reduced so that the second portion 23 of the first compression spring assembly 21 has lifted from the first DC voltage contact 19 and no longer connected to this consists. However, the diode 25 continues to connect the two connector elements 12, 13 via the two compression spring assemblies 21, 24. By the separation from the circuit an oppositely directed induction voltage in the solenoid 11 is formed, which can now be degraded via the diode 25, so that no Abschaltfunken arise and so an operation in explosion-proof environment is possible.

In Figur 3 ist der vollständig ausgesteckte Zustand dargestellt, in dem die beiden Steckverbindungselemente 12, 13 keinen Kontakt mit den Druckfederanordnungen 21, 24 mehr besitzen.In FIG. 3 is the fully unplugged state shown in which the two connector elements 12, 13 have no contact with the compression spring assemblies 21, 24 more.

Die Federkraft insbesondere der ersten Druckfederanordnung 21 muss so abgestimmt sein, dass der erste, als Blatt- oder Tellerfeder ausgebildete Teilbereich 23 der ersten Druckfederanordnung 21 so niedergedrückt wird, dass er in Kontakt mit dem negativen Gleichspannungskontakt 19 gelangt. Besitzt der erste Teilbereich 22 der Druckfederanordnung 21 eine härtere Federkennlinie als der zweite Teilbereich 23, so erfolgt beim Einstecken der Steckverbindungselemente 12, 13 ein relativ früher Kontakt und beim Ausstecken ein relativ spätes Ablösen vom ersten Gleichspannungskontakt 19, während dies bei umgekehrten Eigenschaften in umgekehrter Weise der Fall ist, d.h. bei einem ersten Teilbereich 22 mit weicherer Federkennlinie gegenüber dem zweiten Teilbereich 23 erfolgt eine relativ späte Kontaktierung beim Einstecken und eine relativ frühe Kontakttrennung beim Ausstecken.The spring force, in particular of the first compression spring arrangement 21, must be adjusted such that the first partial region 23 of the first compression spring arrangement 21 designed as a leaf or plate spring is pressed down in such a way that it comes into contact with the negative direct voltage contact 19. If the first subregion 22 of the compression spring arrangement 21 has a harder spring characteristic than the second subregion 23, a relatively early contact takes place when the plug connection elements 12, 13 are plugged in, and a relatively late detachment occurs during disengagement From the first DC voltage contact 19, while this is the case in reverse properties in the reverse manner, ie at a first portion 22 with softer spring characteristic over the second portion 23 is a relatively late contact during insertion and a relatively early contact separation during unplugging.

In Abwandlung des dargestellten Ausführungsbeispiels kann anstelle einer kombinierten zweistufigen Druckfederanordnung 21 auch eine solche eingesetzt werden, bei der die beiden Teilbereiche durch zwei Schraubenfedern oder durch zwei Blatt- oder Tellerfedern in stufiger Anordnung, also in Reihenanordnung gebildet werden. Die zweite Druckfederanordnung 24 wird dann jeweils mit entsprechender Dimensionierung und entsprechenden Federeigenschaften ausgebildet, d.h., im dargestellten Ausführungsbeispiel besitzt die zweite Druckfederanordnung 24 dieselben oder ähnliche Federeigenschaften wie der erste Teilbereich 22 der ersten Druckfederanordnung 21.In a modification of the illustrated embodiment may be used instead of a combined two-stage compression spring assembly 21, one in which the two portions are formed by two coil springs or by two leaf or disc springs in a stepped arrangement, ie in a row. The second compression spring assembly 24 is then each formed with appropriate dimensioning and spring characteristics, that is, in the illustrated embodiment, the second compression spring assembly 24 has the same or similar spring characteristics as the first portion 22 of the first compression spring assembly 21.

Selbstverständlich kann die erste Druckfederanordnung 21 und die zweite Druckfederanordnung 24 auch bezüglich der beiden Pole vertauscht angeordnet sein, wobei prinzipiell auch an beiden Polen zweistufige Druckfederanordnungen vorgesehen sein können. Wesentlich dabei ist lediglich, dass beim Ausstecken der Steckverbindungselemente 12, 13 noch ein Kontakt mit den beiden Anschlüssen der Diode 25 besteht, nachdem die Verbindung mit einem der Gleichspannungskontakte 19, 20 getrennt wurde.Of course, the first compression spring arrangement 21 and the second compression spring arrangement 24 can also be arranged reversed with respect to the two poles, wherein two-stage compression spring arrangements can in principle also be provided at both poles. The essential thing is merely that when unplugging the connector elements 12, 13 is still a contact with the two terminals of the diode 25 after the connection with one of the DC voltage contacts 19, 20 has been disconnected.

Bei dem in Figur 4 dargestellten zweiten Ausführungsbeispiel sind gleiche oder gleichwirkende Bauteile oder Baugruppen mit denselben Bezugszeichen versehen und nicht nochmals beschrieben. Anstelle von Druck- bzw. Schraubenfedern treten beim zweiten Ausführungsbeispiel Federzungen 26 bis 28, die im eingesteckten Zustand der beiden Steckverbindungselemente 12, 13 federnd seitlich an diesen anliegen und dadurch die elektrische Verbindung mit den beiden Gleichspannungskontakten 19, 20 bzw. der Diode 25 herstellen.At the in FIG. 4 illustrated second embodiment are the same or equivalent components or assemblies provided with the same reference numerals and not described again. Instead of pressure or coil springs occur in the second embodiment, spring tongues 26 to 28, which in inserted state of the two connector elements 12, 13 abut resiliently laterally thereto and thereby establish the electrical connection with the two DC voltage contacts 19, 20 and the diode 25.

Die beiden Federzungen 26, 27 bilden eine erste Federanordnung 29, wobei die Federzunge 26 als erster Teilbereich der ersten Federanordnung 29 mit einem Anschluss der Diode 25 und die Federzunge 27 als zweiter Teilbereich der ersten Federanordnung 29 mit dem negativen Gleichspannungskontakt 19 verbunden ist. Diese beiden Federzungen 26, 27 liegen dabei in der Steckrichtung hintereinander seitlich am ersten Steckverbindungselement 12 an, wobei die Anlage der Federzunge 26 weiter vom negativen Gleichspannungskontakt 19 entfernt ist, als die Anlage der zweiten Federzunge 27.The two spring tongues 26, 27 form a first spring assembly 29, wherein the spring tongue 26 is connected as a first portion of the first spring assembly 29 with a terminal of the diode 25 and the spring tongue 27 as the second portion of the first spring assembly 29 with the negative DC voltage contact 19. These two spring tongues 26, 27 are in the insertion direction one behind the other laterally on the first connector element 12, wherein the system of the spring tongue 26 is further removed from the negative DC voltage contact 19, as the system of the second spring tongue 27th

Die Federzunge 28 bildet die zweite Federanordnung 30, die im eingesteckten Zustand der Steckverbindungselemente 12, 13 am zweiten Steckverbindungselement 13 in Höhe entsprechend der Federzunge 26 anliegt.The spring tongue 28 forms the second spring arrangement 30, which rests in the inserted state of the connector elements 12, 13 on the second connector element 13 in height corresponding to the spring tongue 26.

Infolge dieser stufenartig hintereinander angeordneten Anlage der Federzungen 26, 27 am ersten Steckverbindungselement 12 verliert beim Ausstecken zunächst die mit dem negativen Gleichspannungskontakt 19 verbundene Federzunge 27 den Kontakt mit dem Steckverbindungselement 12, so dass der Stromkreis zur Magnetspule 11 aufgetrennt ist. Über die sich dann noch in Kontakt mit den beiden Steckverbindungselementen 12, 13 befindlichen Federzungen 26 und 28, die mit der Diode 25 verbunden sind, überbrückt diese Diode 25 noch die beiden Anschlüsse der Magnetspule 11 und schließt die Induktionsspannung funkenfrei kurz. Erst dann erfolgt ein Lösen der verbleibenden Federzungen 26, 28 von den Steckverbindungselementen 12, 13.As a result of this step-like arrangement of the spring tongues 26, 27 on the first connector 12 loses when unplugged first connected to the negative DC contact 19 spring tongue 27 makes contact with the connector element 12, so that the circuit is separated to the solenoid 11. About the then still in contact with the two connector elements 12, 13 located spring tongues 26 and 28 which are connected to the diode 25, this diode 25 bridges the two terminals of the solenoid 11 and closes the induction voltage spark-free short. Only then is a release of the remaining spring tongues 26, 28 of the connector elements 12, 13th

Für den Abstand der Anlage der Federzunge 28 am zweiten Steckverbindungselement 13 ist es wesentlich, dass diese Anlage noch besteht, wenn sich die Federzunge 27 vom Steckverbindungselement 12 ablöst.For the distance of the system of the spring tongue 28 on the second connector element 13, it is essential that this system still exists when the spring tongue 27 detaches from the connector element 12.

Beim in Figur 4 dargestellten zweiten Ausführungsbeispiel tritt anstelle der Steckverbindungsanordnung 14 des ersten Ausführungsbeispiels eine modifizierte Steckverbindungsanordnung 14' und anstelle der Steckaufnahme 15 des ersten Ausführungsbeispiels eine modifizierte Steckaufnahme 15'.When in FIG. 4 shown second embodiment, instead of the connector assembly 14 of the first embodiment, a modified connector assembly 14 'and instead of the socket 15 of the first embodiment, a modified socket 15'.

Claims (12)

  1. Device for the spark-free unplugging of a magnet coil (11) which may be connected via two electrical plug-in connection elements (12, 13) of a plug-in connection assembly (14; 14') to two DC voltage contacts (19, 20), characterised in that the first and the second of these plug-in connection elements (12, 13) is electrically connected in the plugged-in state, via a first and a second spring assembly (21, 24; 29, 30) to the first and second DC voltage contact (19, 20) and at least one diode (25) polarised in the inhibiting direction connects the two spring assemblies(21, 24; 29, 30) to one another, and that at least the first spring assembly (21; 29) consists of two sections (22, 23; 26, 27), of which the first section (22; 26) is connected constantly to the diode (25) and flexibly contacts the first plug-in connection element (12) in the plugged-in state, and of which the second section (23; 27) of this plug-in connection element (12) in the plugged-in state makes electrical contact with the first DC voltage contact (19), wherein the second section (23; 27) is designed, during unplugging, to break this electrical connection before the release of the contact of the first section (22; 26) of this spring assembly (21; 29) at the first plug-in connection element (12) and before the release of the contact of the second spring assembly (24; 30) at the second plug-in connection element (13).
  2. Device according to claim 1, characterised in that the second section (27) of the first spring assembly (29) is electrically connected securely to the first DC voltage contact (19) and in the direction of unplugging makes flexible contact with the first plug-in connection element (12) behind the second section (27).
  3. Device according to claim 2, characterised in that the two sections (26, 27) of the first spring assembly (29) are in the form of spring tongues.
  4. Device according to claim 2 or 3, characterised in that the second spring assembly (30) is in the form of a spring tongue (28).
  5. Device according to claim 1, characterised in that the first spring assembly (21) is in the form of a two-stage compression spring assembly which may be pressed together by the first plug-in connection element (12) during plugging-in, wherein the first section (22) contacts the first plug-in connection element (12) as the first stage, and the second section (23) as the second stage is designed to make electrical connection between the first section (22) and the first DC voltage contact (19) from a presettable spring pressure onwards.
  6. Device according to claim 5, characterised in that the first section (22) is in the form of a coil spring and the second section (23) is in the form of a leaf or cup spring.
  7. Device according to claim 5, characterised in that both sections are in the form of coil springs.
  8. Device according to claim 5, characterised in that both sections are in the form of leaf or cup springs.
  9. Device according to any of claims 5 to 8, characterised in that the second spring assembly (24) is in the form of a compression spring assembly which may be pressed together by the plug-in connection assembly (14) and has spring properties which ensure breaking of the contact at the plug-in connection assembly (14) during unplugging after breaking the electrical connection of the first spring assembly (21) with the first DC voltage contact (19).
  10. Device according to any of the preceding claims, characterised in that the magnet coil (11) is in the form of a solenoid of a solenoid valve (10).
  11. Device according to claim 10, characterised in that the two plug-in connection elements (14) are located on the casing of the solenoid valve (10).
  12. Device according to any of the preceding claims, characterised in that a socket (15; 15') of the plug-in connection assembly (14; 14') is provided on a casing or on an electrical coupling element connected or connectable to a cable.
EP07857118A 2007-12-22 2007-12-22 Device for the sparkless disconnection of a solenoid Not-in-force EP2208261B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/011413 WO2009080088A1 (en) 2007-12-22 2007-12-22 Device for the sparkless disconnection of a solenoid

Publications (2)

Publication Number Publication Date
EP2208261A1 EP2208261A1 (en) 2010-07-21
EP2208261B1 true EP2208261B1 (en) 2013-01-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07857118A Not-in-force EP2208261B1 (en) 2007-12-22 2007-12-22 Device for the sparkless disconnection of a solenoid

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EP (1) EP2208261B1 (en)
WO (1) WO2009080088A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016218753B3 (en) * 2016-09-28 2018-01-11 Festo Ag & Co. Kg valve assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1431993B1 (en) * 2002-12-19 2007-01-17 Sony Ericsson Mobile Communications AB Connector with integrated switch
JP4308065B2 (en) * 2004-03-31 2009-08-05 新電元工業株式会社 DC outlet
US7063570B1 (en) * 2005-02-25 2006-06-20 Delphi Technologies, Inc. Electrical connector and component packaging assembly

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WO2009080088A1 (en) 2009-07-02
EP2208261A1 (en) 2010-07-21

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