FR2762143A1 - Dismantlable device for improving electrical contact - Google Patents

Dismantlable device for improving electrical contact Download PDF

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Publication number
FR2762143A1
FR2762143A1 FR9704918A FR9704918A FR2762143A1 FR 2762143 A1 FR2762143 A1 FR 2762143A1 FR 9704918 A FR9704918 A FR 9704918A FR 9704918 A FR9704918 A FR 9704918A FR 2762143 A1 FR2762143 A1 FR 2762143A1
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FR
France
Prior art keywords
insert
machined
connection
welding
electrical contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9704918A
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French (fr)
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FR2762143B1 (en
Inventor
Michel Pillet
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Individual
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Individual
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Publication date
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Priority to FR9704918A priority Critical patent/FR2762143B1/en
Publication of FR2762143A1 publication Critical patent/FR2762143A1/en
Application granted granted Critical
Publication of FR2762143B1 publication Critical patent/FR2762143B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H01R4/625—Soldered or welded connections

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

The good conducting insert (1) facilitates the passage of current and is made of pre-machined copper. Connection between the insert and the weak conduction component (2) is by welding. It can also be effected by clamping. The cut-out receiving the welded insert is formed without much accuracy by oxy-cutting. The pre-machined insert is subjected to treatment in order to improve its contact qualities. Also, its geometry is adapted in order to assist electrical conduction in the weak conduction component. As an unlimited indication, the insert can have a thickness of 20 mm and a contact surface of approximately 6000 mm<2> for a current preferably of 3000 A.

Description

La présente invention concerne un dispositif d'amélioration de contact électrique pour matériaux à faible conduction des circuits électriques haute intensité.The present invention relates to an electrical contact improvement device for low conduction materials of high intensity electrical circuits.

Traditionnellement, ces circuits électriques comportent des barres d'alimentation en cuivre ou aluminium de forte section boulonnées sur les récepteurs (cuves d'électrolyse, fours...) généralement en acier. La démontabilité est nécessaire pour isoler un circuit ou changer un élément. Les procédés de liaison non démontables, comme le soudage, ne sont donc pas adaptés alors qu'ils donnent de bonnes performances électriques. Afin de limiter la surface de contact nécessaire tout en assurant une chute de tension correcte au passage du courant, les éléments à faible conduction sont métallisés. Ces métallisations sont généralement réalisées sur l'acier, après sablage, par projection de cuivre en fusion, sur quelques dixièmes de mm d'épaisseur. La densité de courant acceptable dans ce type de connexion reste limitée et, en cas de surcharge, l'échauffement important provoque une destruction rapide. Une surveillance particulière est donc nécessaire pour mesurer leur dégradation. Une variante de métallisation, par soudage avec apport de métal bon conducteur et forte pénétration, peut être appliquée. La liaison est alors fiable, avec de meilleurs résultats électriques mais un coût beaucoup plus important et l'obligation de réusiner les surfaces après soudage.Traditionally, these electrical circuits have large section copper or aluminum power bars bolted to the receivers (electrolytic cells, furnaces, etc.), generally made of steel. Disassembly is necessary to isolate a circuit or change an element. Non-removable bonding processes, such as welding, are therefore not suitable even though they give good electrical performance. In order to limit the necessary contact surface while ensuring a correct voltage drop when the current flows, the low conduction elements are metallized. These metallizations are generally carried out on the steel, after sandblasting, by spraying molten copper, over a few tenths of a mm of thickness. The acceptable current density in this type of connection remains limited and, in the event of an overload, the significant heating causes rapid destruction. Particular monitoring is therefore necessary to measure their degradation. A variant of metallization, by welding with the addition of good conductive metal and strong penetration, can be applied. The connection is then reliable, with better electrical results but a much higher cost and the obligation to remachine the surfaces after welding.

L'épaisseur de métal déposé ne pouvant être inférieur à quelques mm, il est nécessaire d'enlever de la matière avant de déposer les cordons de soudure juxtaposés qui vont recomposer, après usinage, une surface conductrice acceptable. Ce dernier procédé est difficilement applicable sur les surfaces verticales et sur les gros ensembles non transportables, en raison des difficultés de soudage et de réusinage localisé.As the deposited metal thickness cannot be less than a few mm, it is necessary to remove material before depositing the juxtaposed weld beads which, after machining, will reconstruct an acceptable conductive surface. The latter process is difficult to apply on vertical surfaces and on large non-transportable assemblies, due to the difficulties of welding and localized re-machining.

Le dispositif, selon l'invention, permet de remédier à ces inconvénients. Il comporte en effet, selon une première caractéristique, un élément bon conducteur préfabriqué, inséré durablement dans l'ensemble à faible conduction et présentant une surface de contact performante. The device according to the invention overcomes these drawbacks. It indeed comprises, according to a first characteristic, a prefabricated good conductor element, permanently inserted into the low conduction assembly and having a high-performance contact surface.

Selon des modes particuliers de réalisation * le système de contact inséré peut être réalisé à l'aide d'une pièce massive en cuivre pré-usiné.According to particular embodiments * the inserted contact system can be produced using a solid piece of pre-machined copper.

* l'insert pré-usiné peut être traité (argenté ou doré) pour améliorer ses qualités de contact * la liaison de l'insert dans l'élément à faible conduction peut être réalisée par soudage, brasage, friction ou serrage.* the pre-machined insert can be treated (silver or gold) to improve its contact qualities * the connection of the insert in the low conduction element can be achieved by welding, brazing, friction or clamping.

* la découpe recevant l'insert peut-être réalisée sans grande précision par usinage ou oxycoupage $ la géométrie de l'insert peut être adaptée pour aider la conduction dans
I'élément hors la connexion * l'intégration de l'insert permet de ne pas augmenter l'encombrement du système et d'être utilisé en réparation sans modification des barres de raccordement.* the cut receiving the insert can be made without great precision by machining or flame cutting $ the geometry of the insert can be adapted to help conduction in
The off-line element * integration of the insert makes it possible not to increase the size of the system and to be used for repairs without modifying the connection bars.

Les dessins annexés illustrant l'invention.The accompanying drawings illustrating the invention.

Les figures l et 2 représentent le dispositif suivant l'invention en coupe et vue de face avec soudage.Figures 1 and 2 show the device according to the invention in section and front view with welding.

Les figures 3 et 4 représentent le dispositif suivant l'invention en coupe et vue de face avec serrage.Figures 3 and 4 show the device according to the invention in section and front view with clamping.

En référence à ces dessins, le dispositif comporte l'insert (1), lié à l'élément de faible conduction (2) d'une façon non démontable par soudage (3) brasage (4) ou serrage (5).With reference to these drawings, the device comprises the insert (1), linked to the low conduction element (2) in a manner that cannot be removed by welding (3) brazing (4) or clamping (5).

La liaison entre (1) et (2) n'étant pas démontée, celle-ci peut être optimisée et fiabilisée. La surface (6) peut être pré-usinée dans de très bonnes conditions de réalisation.As the connection between (1) and (2) is not dismantled, it can be optimized and made more reliable. The surface (6) can be pre-machined under very good production conditions.

A titre d'exemple non limitatif, l'insert aura une épaisseur de 20 mm et une surface de contact d'environ 6000 mm2 pour un courant entre 1000 et 6000A et de préférence 3000A.By way of non-limiting example, the insert will have a thickness of 20 mm and a contact surface of approximately 6000 mm2 for a current between 1000 and 6000A and preferably 3000A.

Le dispositif suivant l'invention est particulièrement destiné aux circuits électrique haute intensité des salles d'électrolyse, des aciéries et des stations d'essais. The device according to the invention is particularly intended for high-intensity electrical circuits in electrolysis rooms, steelworks and test stations.

Claims (7)

Revendications Claims courant. current. qu'il comporte l'intégration d'un insert bon conducteur facilitant le passage du that it includes the integration of a good conductor insert facilitating the passage of the faible conductivité des circuits électriques haute intensité, caractérisé en ce low conductivity of high intensity electrical circuits, characterized in that Dispositif d'amélioration de contact électrique démontable pour matériaux à Removable electrical contact improvement device for materials with 2 Dispositif suivant la revendication 1 caractérisé en ce que l'insert intégré est en2 Device according to claim 1 characterized in that the integrated insert is in cuivre pré-usiné. pre-machined copper. 3 Dispositif suivant la revendication 1 ou 2 caractérisé en ce que la liaison de3 Device according to claim 1 or 2 characterized in that the connection of l'insert dans l'élément à faible conduction est réalisé par soudage. the insert in the low conduction element is made by welding. 4 Dispositif suivant la revendication 1 ou 2 caractérisé en ce que la liaison de4 Device according to claim 1 or 2 characterized in that the connection of l'insert dans l'élément à faible conduction est réalisée par serrage. the insert in the low conduction element is made by clamping. 5 Dispositif suivant la revendication 1 ou 2 caractérisé en ce que la découpe5 Device according to claim 1 or 2 characterized in that the cutout recevant l'insert soudé est réalisée sans grande précision par oxycoupage. receiving the welded insert is produced without great precision by flame cutting. 6 Dispositif suivant l'une quelconque des revendications précédentes caractérisé6 Device according to any one of the preceding claims characterized en ce que l'insert pré-usiné est traité pour améliorer ses qualités de contact. in that the pre-machined insert is treated to improve its contact qualities. 7 Dispositif suivant l'une quelconque des revendications précédentes caractérisé7 Device according to any one of the preceding claims characterized en ce que la géométrie de l'insert est adaptée pour aider la conduction in that the geometry of the insert is adapted to aid conduction électrique dans l'élément à faible conduction. electrical in the low conduction element.
FR9704918A 1997-04-15 1997-04-15 DEVICE FOR IMPROVING ELECTRICAL CONTACT FOR MATERIALS WITH LOW CONDUCTION OF HIGH INTENSITY CIRCUITS Expired - Fee Related FR2762143B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9704918A FR2762143B1 (en) 1997-04-15 1997-04-15 DEVICE FOR IMPROVING ELECTRICAL CONTACT FOR MATERIALS WITH LOW CONDUCTION OF HIGH INTENSITY CIRCUITS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9704918A FR2762143B1 (en) 1997-04-15 1997-04-15 DEVICE FOR IMPROVING ELECTRICAL CONTACT FOR MATERIALS WITH LOW CONDUCTION OF HIGH INTENSITY CIRCUITS

Publications (2)

Publication Number Publication Date
FR2762143A1 true FR2762143A1 (en) 1998-10-16
FR2762143B1 FR2762143B1 (en) 1999-05-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR918578A (en) * 1945-08-22 1947-02-12 Auxiliaire Appar Electric Device for connecting an aluminum lug to a copper terminal
CH470062A (en) * 1966-08-02 1969-03-15 Alusuisse Process for producing a contact surface on aluminum busbars and aluminum busbar with a contact surface produced according to this process
FR2246091A1 (en) * 1973-09-29 1975-04-25 Vaw Ver Aluminium Werke Ag Joining aluminium or copper rails to steel conductors - esp. for aluminium mfr. by electrolysis, using explosion plated joint
US4181396A (en) * 1978-09-05 1980-01-01 General Electric Company Aluminum-copper electrical joint
FR2495385A1 (en) * 1980-11-28 1982-06-04 Inco Ltd Copper busbar to titanium conductor connector in electrolytic cells - has copper bolt threaded into titanium conductor with notched head resting on knife edge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR918578A (en) * 1945-08-22 1947-02-12 Auxiliaire Appar Electric Device for connecting an aluminum lug to a copper terminal
CH470062A (en) * 1966-08-02 1969-03-15 Alusuisse Process for producing a contact surface on aluminum busbars and aluminum busbar with a contact surface produced according to this process
FR2246091A1 (en) * 1973-09-29 1975-04-25 Vaw Ver Aluminium Werke Ag Joining aluminium or copper rails to steel conductors - esp. for aluminium mfr. by electrolysis, using explosion plated joint
US4181396A (en) * 1978-09-05 1980-01-01 General Electric Company Aluminum-copper electrical joint
FR2495385A1 (en) * 1980-11-28 1982-06-04 Inco Ltd Copper busbar to titanium conductor connector in electrolytic cells - has copper bolt threaded into titanium conductor with notched head resting on knife edge

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Publication number Publication date
FR2762143B1 (en) 1999-05-21

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Effective date: 20061230