EP2080253B1 - Eclateur a haute puissance, encapsule, resistant a la pression, etanche mais non hermetique et a symetrie de rotation - Google Patents

Eclateur a haute puissance, encapsule, resistant a la pression, etanche mais non hermetique et a symetrie de rotation Download PDF

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Publication number
EP2080253B1
EP2080253B1 EP06819662A EP06819662A EP2080253B1 EP 2080253 B1 EP2080253 B1 EP 2080253B1 EP 06819662 A EP06819662 A EP 06819662A EP 06819662 A EP06819662 A EP 06819662A EP 2080253 B1 EP2080253 B1 EP 2080253B1
Authority
EP
European Patent Office
Prior art keywords
cup
spark gap
gas
electrode
blow
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
Application number
EP06819662A
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German (de)
English (en)
Other versions
EP2080253A1 (fr
Inventor
Arnd Ehrhardt
Michael Waffler
Uwe Strangfeld
Stephan Hierl
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.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102006048977.2A external-priority patent/DE102006048977B4/de
Application filed by Dehn and Soehne GmbH and Co KG filed Critical Dehn and Soehne GmbH and Co KG
Publication of EP2080253A1 publication Critical patent/EP2080253A1/fr
Application granted granted Critical
Publication of EP2080253B1 publication Critical patent/EP2080253B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T2/00—Spark gaps comprising auxiliary triggering means
    • H01T2/02—Spark gaps comprising auxiliary triggering means comprising a trigger electrode or an auxiliary spark gap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel

Definitions

  • the invention relates to an encapsulated, pressure-resistant executed, non-hermetically sealed, rotationally symmetrical high-performance spark gap with two opposing main electrodes, a metallic outer housing, a gas or plasma cooling space surrounded by the outer housing and preferably frontally arranged electrical connection contacts for the main electrodes according to the preamble of patent claim 1.
  • surge arresters on the basis of spark gaps according to the prior art, these are designed to be encapsulated in applications in the low-voltage range in order to avoid the environment-threatening blowing out of hot or even ionized gases.
  • the arresters are provided with additional triggering devices.
  • a trigger device requires isolation of the additional, generally loaded with high voltage further electrode.
  • the additional expenditure of space and the additional insulation materials also lead to a further limitation of the performance of such realized arrester.
  • the potential of the ignition electrode is also supplied via the pressure-resistant metallic shell of the spark gap.
  • the local pressure-resistant jacket is made of one piece and it is used for the preparation of a simple forming process.
  • the waiver of an insulated implementation of the ignition potential leads in this variant, however, to an additional burden of insulation in the interior of the spark gap, since both electrodes must be isolated not only against each other, but also with respect to the entire housing.
  • the complex and voltage-resistant insulation in particular, the heat output from the spark gap This leads to an increased thermal load on the insulation parts, to long cooling times and to an enormous limitation of the space available for the spark gap. All of these disadvantages ultimately limit the performance of the spark gap.
  • Meandering cooling channels are for example from the DE 29 34 237 A1 Previously known according to the local surge arrester arrangement.
  • Helical cooling channels in coaxial arranged cup-shaped housing parts spark gaps are the DE 20 2004 020 260 U1 or the DE 103 38 835 A1 removable, showing both overvoltage protection devices.
  • the most essential components of the proposed high-performance spark gap consist in an effective cooling of the hot gases in a meandering cooling channel with staggered vents, in a pressure-resistant embodiment of the active components within the spark gap and a flameproof, encapsulated execution of the intermediate and Abkühlraums within the outer housing.
  • the cooling space of the high-performance spark gap consists of a coaxial arrangement of an inner and an outer metal cup, wherein one of the main electrodes is formed as a hollow cylindrical Ausblaselektrode and extends to a large extent in the inner cup of the coaxial arrangement.
  • a discharge ring electrode laterally encompassing centering support ring is provided.
  • the support ring is pressure-resistant, preferably non-positively and / or positively connected to the outer cup, for example, connected by a corresponding thread pairing.
  • the outer cup of the coaxial arrangement has lateral bores as gas outlet openings. Between the inner and the outer cup of the coaxial arrangement, at least one gas cooling channel is provided. Another gas cooling channel is located between the outer wall of the outer cup and the inner wall of the outer casing.
  • the high-performance spark gap should allow a higher impulse load or a stronger current limit with the result that more energy is converted in the spark gap, whereby a larger amount of heated gas or plasma is formed.
  • the proposed spark gap also dominates the increased burnup, and without burnup particles completely close the existing ventilation channels.
  • vents which are staggered arranged in the cooling channel, initially have small cross-sections to prevent the escape of luminous gas and melt particles, and take only in the course of the further extension of the cooling channel to cross-section, whereby the flow and relaxation in the entire cooling channel can be used. By these measures, a clogging of individual vents in the initial region of the cooling channel is compensated.
  • the blow-out electrode according to the invention has at its top side facing the counter-electrode an annular flange on which bears the complementary grading having support ring.
  • the underside of the blow-out electrode is closed, but has lateral gas outlet openings, wherein the underside additionally has an oriented in the electrode longitudinal direction of the guide extension, which engages in a complementary recess in the inner cup.
  • At least one gas cooling channel already mentioned is located between the inner bowl and the guide extension, which extends into a threaded opening of the inner bowl, which forms a connection contact.
  • Each cup of the coaxial assembly has a circular nozzle, wherein the circular nozzle of the inner cup is mounted in the circular nozzle of the outer cup.
  • the outer housing is formed positively fitting, and ungsitz for example by a beading.
  • the pressure-resistant connection of the coaxial arrangement including the support ring and blow-out electrode is realized in accordance with the construction described above by force and / or positive locking, in particular by screwing.
  • a sleeve or disc made of a gas-emitting material e.g. POM arranged, wherein the support ring surrounds the sleeve or disc of this gas-emitting material at least partially outer peripheral side.
  • the gas-emitting material has the function of radial blowing of the arc. This is used to limit the secondary current by cooling and extending the arc.
  • the solution with recourse to the illustrated support ring ensures a mastery of the consequences of higher Pulse currents.
  • the support ring can be made electrically conductive or insulating. Decisive is the resulting internal stabilization of the components of the spark gap, by a more even distribution of the load on the one hand and on the other hand by an improvement in the mechanical properties as a whole.
  • the pressure which builds up in the relaxation area of the hot gases within the spark gap, acts directly on the area of the active gas-emitting components. This is done on the one hand directly by gases, which can penetrate via column of stack parts, and on the other hand indirectly on the mobility of the individual spark gap sections under or against each other. Such a movement is particularly critical if the gas delivery is not uniform and all sides in the relaxation area, as this can lead to an uneven pressure load and thus to notch effects and damage to individual parts.
  • the example according screwing according to the invention of parts of the expansion chamber with the lower main electrode creates a pressure-resistant cooling space.
  • This solution causes a uniform distribution of the pressure or force effect on the active gas-emitting components and also avoids a direct gas flow between the cooling space and the active parts or the arc furnace and the cooling space.
  • a slipped centering and insulating body is placed on the guide extension of the main electrode as a disc with a guide extension, wherein the insulating body surrounds the disc of the main electrode in a preferred variant laterally.
  • a seal in particular a sealing ring can be arranged.
  • Blow-off electrode and screwed support ring quasi stack-shaped, wherein the initially only one side flanged hollow cylindrical outer housing receives the stack assembly.
  • Fig. 1 At the spark gap after Fig. 1 is located within an outer housing 1, the arrangement of active and passive components.
  • an inner cup 8 is provided to form the pressure-resistant cooling space, which is surrounded by an outer cup 9 at a distance to obtain a gas cooling channel 12.
  • one of the main electrodes which is realized as a hollow-cylindrical blow-out electrode 3, extends into it.
  • a discharge ring 3 laterally encompassing support ring 7 is provided on the open side of the cup assembly.
  • the support ring 7 has an external thread, which corresponds to an internal thread in the outer cup 9.
  • lateral gas outlet openings 10 are present, wherein between the inner and the outer cup 8, 9 at least the aforementioned gas cooling channel 12 is formed, and between the outer wall of the outer cup 9 and the inner wall of the outer housing 1, a further gas cooling channel 13 is located.
  • the underside of the blow-out electrode 3 is closed, but has lateral gas outlet openings 19.
  • the underside of the blow-out electrode 3 further has a guide extension 14, which engages in a complementary recess in the inner cup 8.
  • a gas cooling channel 15 is located, which extends into a threaded opening 16 of the inner cup 8.
  • This threaded opening 16 forms an element of the terminal 17, e.g. a screw contact.
  • Each of the aforementioned cups 8, 9 of the coaxial arrangement has a circular nozzle 25; 26, wherein the circular ring nozzle 25 of the inner cup 8 is mounted in the diameter-adapted circular nozzle piece 26 of the outer cup 9 and the outer casing 1 rests positively in the region of the circular nozzle 26 of the outer cup 9.
  • the positive connection is achieved here by a flanging in a press-forming process.
  • a sleeve or disc 6 made of a gas-emitting material, e.g. POM arranged so that sets in the case of igniting the arc, a radial blowing of the same.
  • the blowing electrode 3 opposite, further main electrode 2 is formed in the form of a disc 27 with guide extension 28.
  • the guide extension 28 has a threaded bore for connection contacting.
  • a second slipped over insulating 4 is placed on the guide extension 28 of the other main electrode 2, said insulating body 11, the disc 27 of the main electrode 2 according to the embodiment according to Fig. 1 surrounds laterally.
  • a seal in particular in the form of a sealing ring.
  • the above-described high-performance spark gap enables a doubling of the surge current carrying capacity from approximately 25 kA to 50 kA while at the same time maintaining high ignition safety and optimum gas cooling behavior.
  • the inner and outer cups may be reduced in cost by using less erosion-resistant materials, e.g. Steel or copper, are made, these materials should have a preferably good heat conduction and high heat capacity.
  • the inner cup 8 has, as from the principle sectional view to Fig. 1 Removable, a particularly strong wall and a reinforced floor, so that an increased arc erosion is compensated and melting can be avoided.
  • a plurality of holes 10 are coaxially distributed, which are placed in one or more circumferential grooves 11.
  • the gap or the gas guide channel 13 between the outer cup 9 and the outer housing 1 can be made wider.
  • helical ventilation ducts 18 of small cross-section may be present, which have a large ratio of their circumference to the cross-section, resulting in better cooling.
  • the circumferential grooves 11 and the gap between the outer cup and the outer housing serve to receive melt, whereby a clogging of the holes 10 is reliably avoided.
  • circumferential grooves In addition to circumferential grooves, the design of a circumferential spiral is also conceivable here in one embodiment, or it is additionally possible to use vertical grooves, e.g. to realize in the longitudinal axis of the arrangement.
  • Fig. 2 / 1 and 2.2 the area of the vents in the bottom of the blow-off electrode 3 and the inner 8 and the outer cup 9 is shown.
  • This venting is realized via spiral grooves, in addition or instead of such spiral grooves ( Fig. 1 ), as in the illustrations Fig. 2 / 1 and 2.2 illustrated, a plurality of holes in the bottom of the inner cup 8 (section A) can be introduced. Through these holes 30 gas and melt reaches the bottom of the outer cup 9, which has a circumferential groove 32 with respect to the holes offset channels or a multiply fed spiral (section B / reference numeral 32).
  • the support ring 7 is made of stainless steel in the embodiment shown and can take over the function of the potential control.
  • the centering bodies 4 and 5 embed the main electrode 2, the centering body 5 forming the insulating flashover gap.
  • the sleeve or disc 6 represents the conductive or semiconductive gas donating rollover stretch portion, wherein the support ring 7 carries the sleeve or disc 6.

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  • Plasma Technology (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Casings For Electric Apparatus (AREA)

Claims (9)

  1. Éclateur à haute puissance, encapsulé, résistant à la pression, étanche mais non hermétique et à symétrie de révolution, comprenant deux électrodes principales opposées écartées, un boîtier extérieur métallique, une chambre de refroidissement de gaz ou de plasma entourée par le boîtier extérieur, ainsi que des contacts de raccordement électrique agencés de préférence du côté frontal pour les électrodes principales, caractérisé en ce que
    - la chambre de refroidissement est formée par un agencement coaxial d'un godet intérieur (8) et d'un godet extérieur (9), et l'une des électrodes principales est réalisée sous forme d'une électrode (3) de soufflage cylindrique creuse et s'étend jusque dans le godet intérieur (8),
    - il est en outre prévu sur le côté ouvert de l'agencement de godet une bague de soutien (7) à effet de centrage qui entoure latéralement l'électrode (3) de soufflage, et la bague de soutien (7) est reliée au godet extérieur (9) de manière à résister à la pression au moyen d'un vissage,
    - le godet extérieur (9) possède des ouvertures de sortie de gaz (10) latérales qui se trouvent dans des gorges (11), et il est prévu au moins un premier canal de refroidissement de gaz (12) entre le godet intérieur et le godet extérieur (8 ; 9), et il existe un autre second canal de refroidissement de gaz (13) entre la paroi extérieure du godet extérieur (9) et la paroi intérieure du boîtier extérieur (1).
  2. Éclateur selon la revendication 1,
    caractérisé en ce que, dans la région de la face inférieure de l'électrode (3) de soufflage entre le godet intérieur (8) et un prolongement de guidage (14) il existe au moins un canal de refroidissement de gaz (15), qui s'étend jusque dans une ouverture à pas de vis (16) du godet intérieur (8), qui forme un contact de raccordement (17), et une gorge spiralée (18) est ménagée dans le fond extérieur de l'électrode (3) de soufflage pour le guidage du gaz.
  3. Éclateur selon l'une des revendications précédentes,
    caractérisé en ce que chaque godet (8 ; 9) de l'agencement coaxial possède une pipe annulaire circulaire (25 ; 26), et la pipe annulaire circulaire (25) du godet intérieur (8) est montée dans la pipe annulaire circulaire (26) du godet extérieur (9) et s'applique dans la région de la pipe annulaire circulaire (26) du godet extérieur (9) à coopération de formes contre le boîtier extérieur (1).
  4. Éclateur selon l'une des revendications précédentes,
    caractérisé en ce qu'une douille ou un disque (6) en un matériau d'apport de gaz conducteur ou semi-conducteur est agencé(e) entre les électrodes principales (2 ; 3).
  5. Éclateur selon la revendication 4,
    caractérisé en ce que sur le côté, détourné de l'électrode de soufflage, de la douille ou du disque (6) en matériau d'apport de gaz, il est prévu un corps de centrage et d'isolation (5) retroussé.
  6. Éclateur selon la revendication 5,
    caractérisé en ce que l'autre électrode principale (2) opposée à l'électrode de soufflage (3) est réalisée comme un disque (27) avec un prolongement de guidage (28).
  7. Éclateur selon la revendication 6,
    caractérisé en ce qu'il est prévu un autre corps de centrage et d'isolation (4) retroussé, et celui-ci est posé sur le prolongement de guidage (28) de l'autre électrode principale 2), et le corps isolant (4) entoure latéralement le disque (27) de l'électrode principale (2) et un talon périphérique du premier corps d'isolation et de centrage (5).
  8. Éclateur selon la revendication 3,
    caractérisé en ce que des perçages ou des gorges (30) pour le guidage des gaz sont ménagés dans la région de la face inférieure extérieure du godet intérieur (8), et il est prévu une fente (31) entre les pipes annulaires circulaires (25 ; 26).
  9. Éclateur selon la revendication 8,
    caractérisé en ce que des perçages ou des gorges (32) destiné(e)s au guidage des gaz sont ménagé(e)s dans la région de la face inférieure intérieure du godet extérieur (9), lesquel(le)s mènent à la fente (31).
EP06819662A 2006-10-17 2006-11-22 Eclateur a haute puissance, encapsule, resistant a la pression, etanche mais non hermetique et a symetrie de rotation Not-in-force EP2080253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006048977.2A DE102006048977B4 (de) 2005-05-30 2006-10-17 Gekapselte, druckfest ausgeführte, nicht hermetisch dichte, rotationssymmetrische Hochleistungsfunkenstrecke
PCT/EP2006/068747 WO2008046454A1 (fr) 2006-10-17 2006-11-22 éclateur à haute puissance, encapsulé, résistant à la pression, étanche mais non hermétique et à symétrie de rotation

Publications (2)

Publication Number Publication Date
EP2080253A1 EP2080253A1 (fr) 2009-07-22
EP2080253B1 true EP2080253B1 (fr) 2010-10-13

Family

ID=38042911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819662A Not-in-force EP2080253B1 (fr) 2006-10-17 2006-11-22 Eclateur a haute puissance, encapsule, resistant a la pression, etanche mais non hermetique et a symetrie de rotation

Country Status (5)

Country Link
EP (1) EP2080253B1 (fr)
CN (1) CN101529677B (fr)
AT (1) ATE484867T1 (fr)
DE (1) DE502006008106D1 (fr)
WO (1) WO2008046454A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738707B (zh) * 2011-04-15 2014-07-23 上海电科电器科技有限公司 过电压保护装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934237C2 (de) * 1979-08-24 1983-02-17 Aeg-Telefunken Ag, 1000 Berlin Und 6000 Frankfurt Überspannungsableiter
DE19506057B4 (de) * 1995-02-22 2004-07-22 Dehn + Söhne GmbH + Co KG Löschfunkenstreckenanordnung
DE19845889B4 (de) * 1998-10-06 2007-03-01 Dehn + Söhne GmbH + Co KG Funkenstreckenanordnung
DE10008764A1 (de) * 1999-03-04 2000-09-28 Phoenix Contact Gmbh & Co Überspannungsschutzeinrichtung
DE10018012B4 (de) * 2000-02-22 2005-02-24 Dehn + Söhne Gmbh + Co. Kg Druckfest gekapselte Funkenstreckenanordnung zum Ableiten von schädlichen Störgrößen durch Überspannungen
DE10164025B4 (de) * 2001-08-21 2005-08-25 Dehn + Söhne Gmbh + Co. Kg Gekapselter, Netzfolgestrom begrenzender Überspannungsableiter auf Funkenstreckenbasis
DE10338835B4 (de) * 2003-08-21 2016-06-02 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzeinrichtung
DE202004020260U1 (de) * 2004-12-28 2005-02-24 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzeinrichtung
DE102005024658B4 (de) * 2005-05-30 2007-02-15 Dehn + Söhne Gmbh + Co. Kg Gekapselte, druckfest ausgeführte, nicht hermetisch dichte, rotationssymmetrische Hochleistungsfunkenstrecke

Also Published As

Publication number Publication date
CN101529677B (zh) 2012-01-04
ATE484867T1 (de) 2010-10-15
CN101529677A (zh) 2009-09-09
DE502006008106D1 (de) 2010-11-25
EP2080253A1 (fr) 2009-07-22
WO2008046454A1 (fr) 2008-04-24

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