WO2000035054A1 - Socle de connexion electrique, notamment pour atmosphere explosible, et son procede de fabrication - Google Patents
Socle de connexion electrique, notamment pour atmosphere explosible, et son procede de fabrication Download PDFInfo
- Publication number
- WO2000035054A1 WO2000035054A1 PCT/FR1999/002844 FR9902844W WO0035054A1 WO 2000035054 A1 WO2000035054 A1 WO 2000035054A1 FR 9902844 W FR9902844 W FR 9902844W WO 0035054 A1 WO0035054 A1 WO 0035054A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insulating block
- disc
- contact
- peripheral
- housings
- Prior art date
Links
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
- H01R13/44—Means for preventing access to live contacts
- H01R13/447—Shutter or cover plate
- H01R13/453—Shutter or cover plate opened by engagement of counterpart
- H01R13/4532—Rotating shutter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/527—Flameproof cases
Definitions
- Electrical connection base in particular for explosive atmosphere, and its manufacturing process.
- the invention relates to an electrical connection socket, in particular for an explosive or explosive atmosphere, in the form for example of a socket outlet or of a mobile extension socket, and its manufacturing method.
- a connection base is also known as described in document GB-2125234 A, which, to protect the contacts of the base in the absence of any connection with a plug, is provided with a safety disk provided with as many openings peripherals that the insulating block of the base is provided with peripheral contact housings, and which is rotatably mounted on said insulating block by a central aperture with which it is provided and whose inner surface cooperates with the lateral surface of a central protuberance of the insulating block forming a rotation hub, so that the peripheral openings of the disc can be brought at will by rotation of the latter opposite the corresponding housings of the insulating block.
- an explosion-proof joint surface is created between the internal surface of the housing of the plug which is inserted into the base and the external surface of an element fixed to the insulating block. of said base.
- connection base provided with a safety disc as mentioned above, but which is notably remarkable in that at least some of the surfaces in contact with the safety disc and the insulating block as well as the respectively internal surfaces of at least the peripheral openings of the safety disc and the external surfaces of the corresponding pins of the plug form flameproof joint surfaces so that at least the peripheral contact housings of the insulating block constitute at least one flameproof envelope .
- a safety disc as mentioned above, but which is notably remarkable in that at least some of the surfaces in contact with the safety disc and the insulating block as well as the respectively internal surfaces of at least the peripheral openings of the safety disc and the external surfaces of the corresponding pins of the plug form flameproof joint surfaces so that at least the peripheral contact housings of the insulating block constitute at least one flameproof envelope .
- the central protuberance or hub of the insulating block can be, according to one embodiment, pierced for the passage of a central pin of the plug intended to cooperate with a contact arranged in a central housing of the insulating block.
- the safety disc and the insulating block have flat front surfaces which are applied one on top of the other and at least part of which constitutes an explosion-proof joint surface and / or again, the explosion-proof joint surfaces between the safety disc and the insulating block are formed at least in part by at least a part of the lateral rotation surface of the hub of the insulating block and the inner surface of the central opening of the disc.
- the safety disc has a peripheral annular extension which covers a part of the insulating block, at least a part of the overlapping areas of said insulating block and of said extension constituting lateral rotation surfaces forming an explosion-proof seal.
- the lateral surfaces of rotation of the insulating block and of the safety disc formed on the one hand, by the hub and the central aperture of the disc and, on the other hand, by the zones in covering the insulating block and the extension of the disc are cylindrical surfaces of revolution.
- Such an embodiment is not compulsory because said surfaces of rotation, although of revolution, could indeed be other than cylindrical.
- At least the peripheral contact housings are, for example, closed at the base of the corresponding contacts by elements forming in said housings flameproof joint surfaces.
- the hub of the insulating block has a hollow flared end which secures in translation the disc and the insulating block.
- the contacts of the base are end pressure contacts each provided with a contact head, a braid and a helical spring arranged in the corresponding contact housing. It is known that the interstices and the lengths of the explosion-proof joints require great precision.
- the invention further suggests a particular non-compulsory molding process, which is remarkable in that the insulating block is overmolded in or on the safety disc, itself produced beforehand and serving as an insert, removing the material from the block after molding ensuring the gap, or the play, necessary and adjusted between the surfaces in contact with the parts for the rotation of the disc on said block and to constitute the explosion-proof joint or joints.
- FIG. 1 is a top view of a socket outlet fitted with a socket outlet socket according to the invention, and of a plug in the insertion position,
- FIG. 2 is a section on II-II of FIG. 1,
- FIGS. 3 and 4 correspond respectively to FIGS. 1 and 2, showing the plug in the position ready for connection after having been rotated (the section of FIG. 4 being according to IN-IN of FIG. 3),
- FIGS. 5 and 6 correspond respectively to FIGS. 1 and 2 or 3 and 4, showing the plug in the connection position (the section of FIG. 6 being carried out according to VI-NI of FIG. 5),
- FIG. 7 schematically represents a method of manufacturing by overmolding the insulating block of the base in the safety disc
- FIG. 8 is a section along Nl ⁇ -NIII in FIG. 7,
- FIG. 9 shows in perspective from below a safety disk according to the invention
- FIG. 10 shows in perspective from above the insulating block and its safety disk.
- the electrical outlet shown therefore comprises a plug 1 and a base 2.
- the plug 1 is provided with contact pins such as pins 3a, 3b, 3c visible in the sectional views, and the base 2 comprises antagonistic contacts 4a, 4b , 4c.
- the contacts 4a, 4b, 4c of the base are arranged in housings 5a, 5b, 5c formed in an insulating block 6 and they are here by way of nonlimiting example in the form of pressure contacts at the end, generally each constituted conventionally and as shown by a contact head 7, a conductive braid 7 'and a helical pressure spring 8 (the references 7, 7' and 8 are only written in FIG. 2 for the central contact 4b).
- the plug 1 here has five pins and there are of course as many opposing contacts in the base 2 but we can only see three in Figures 4 and 6 and that one in FIG. 2.
- the base 2 is provided with a central housing 5b for a central contact 4b constituting the earth contact intended to cooperate with a central contact pin 3b of the plug, the others contacts 4a, 4c, 3a, 3c of the base and of the plug being said to be peripheral and constituting the phase contacts or the neutral.
- the base is provided with a safety disc 9 rotatably mounted on the insulating block 6, the disc 9 being provided with as many openings 10a, 10b 10c as the plug and the base.
- the base is provided with a protective cover 11 intended to be folded down when the plug is not connected, and with a hook 12 (FIGS. 4 and 6) to lock, either the cover, or the plug in the base in the connection position ( Figures 5 and 6).
- the insulating block 6 is provided with a central protuberance 13 pierced at its center, which forms a rotation hub for the safety disc 9 which cooperates with said hub by the inner surface of its central opening 10b.
- Said central opening 10b of the disc 9 and the central protuberance or hub 13 of the insulating block 6 constitute lateral surfaces of rotation which are further, as shown in this example, at least partly cylindrical in revolution.
- the safety disc 9 is further provided with a peripheral annular extension 14 which covers part of the insulating block 6, the areas overlapping the extension 14 and the insulating block 6 constituting cylindrical surfaces of rotation of revolution, coaxial with the surfaces mentioned above.
- the safety disc 9 hides the peripheral contacts 4a, 4c of the base 2, while the pins 3a, 3b, 3c of the plug can be introduced into the openings 10a, 10b 10c of the safety disc ( Figures 1 and 2).
- the plug undergoes a rotation which causes the rotation of the safety disk until it discovers the peripheral contacts 4a and 4c of the base ( Figures 3 and 4).
- the protrusion 13 of the insulating block 6 is further provided here with a hollow flared part 13 '( Figure 1) which subjects in translation the safety disc 9 and said insulating block 6, said part 13' may also have slots (clearly visible in Figure 10) creating sectors which in particular ensure a certain flexibility.
- the protrusion 13 does not have the flared part 13 ′, the fixing of the disc 9 being ensured by an attached clip.
- peripheral openings 10a, 10c of the disc 9 are perfectly calibrated with respect to the contact pins 3a, 3c of the plug 1. It will be understood that the inner surface of the opening 10b of the disc and the outer surface of the hub 13 constitute lateral surfaces of rotation over a certain length, as well as the areas overlapping the extension 14 of the disc on the block 6, while the peripheral pins 3a, 3c of the plug cross over a certain length the calibrated openings 10a, 10c of the disc 9.
- the contact housings 5a, 5c are closed at their ends opposite to the contact heads by any means and in particular by elements constituting the crimping feet of the contacts of the base as shown in 15a, 15b and 15c.
- these elements form in said housings 15a, 15b, 15c explosion-proof joint surfaces.
- French and European standards define an explosion-proof envelope as a mode of protection in which the parts which can ignite an explosive atmosphere are enclosed in an envelope which resists the pressure developed during an internal explosion of a mixture. explosive and which prevents the transmission of the explosion to the surrounding explosive atmosphere of the enclosure.
- An explosion-proof seal is where the corresponding surfaces of two elements of an enclosure or the common part of enclosures meet and prevent the transmission of an internal explosion to the surrounding explosive atmosphere of the enclosure, its length being the shortest path between the inside and outside of the envelope.
- the gap of an explosion-proof seal is of course the spacing between the corresponding faces of said seal.
- the gap is thus the difference between the diameters of the bore and of the cylindrical body.
- the base according to the invention can therefore be explosion-proof due to the construction of a common explosion-proof envelope for all peripheral contacts by simple construction of explosion-proof seals.
- the invention also provides for constituting, if necessary, a flat explosion-proof joint between the insulating block 6 and the disc 9. As clearly shown in the sectional drawings, the insulating block 6 and the disc 9 have flat front surfaces which apply to each other.
- the gap between said surfaces combined with the distance between two peripheral housings or in an equivalent manner between two peripheral openings 10a, 10c of the safety disc, such as the distance shown diagrammatically at d in FIG. 9, makes it possible to constitute if it is desires an explosion-proof flat seal referenced 16 in the sectional figures, which can thus create an explosion-proof envelope for each peripheral housing 5b, 5c of contact so that the absence of certain pins and therefore of the openings of the disc not closed does not is not detrimental.
- the embodiment described above has two explosion-proof cylindrical seals (hub 13 and extension 14), in addition to those produced by the pins themselves, and optionally an explosion-proof flat seal 16 which makes it possible to produce an explosion-proof envelope for each peripheral electrical contact.
- an explosion-proof flat seal 16 which makes it possible to produce an explosion-proof envelope for each peripheral electrical contact.
- the adjustment of the surfaces of rotation of the disc and of the insulating block is without more delicate doubt.
- the invention also proposes, without this being compulsory, an original molding process.
- the first step is to manufacture the safety disc which can be seen in FIGS. 2, 4, 6 and more particularly in FIGS. 9 and 10, for example by molding, in particular in a thermosetting material.
- the insulating block 6 is molded onto or in the disc 9, this serving as an insert, as shown in FIGS. 7 and 8.
- the injected material 6 ′ used, for example a thermoplastic, to obtain said block 6, arrives as shown in the drawings by suitable injection channels.
- FIG. 9 represents the safety disk 9, in reality in the form of a cap due to its peripheral annular extension 14
- FIG. 10 shows the result obtained from the block 6 and the disk 9 after overmolding, or after assembly of separately molded parts. .
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69922636T DE69922636T2 (de) | 1998-12-04 | 1999-11-19 | Elektrischer sockelkontakt, insbesondere für explosive atmosphäre, und dessen herstellungsverfahren |
EP99956088A EP1053573B1 (fr) | 1998-12-04 | 1999-11-19 | Socle de connexion electrique, notamment pour atmosphere explosible, et son procede de fabrication |
AU12774/00A AU753861B2 (en) | 1998-12-04 | 1999-11-19 | Electric connection base plate in particular for explosible environment and method for making same |
US09/600,172 US6382990B1 (en) | 1999-11-19 | 1999-11-19 | Electric connection base plate in particular for explosible environment and method for making same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9815329A FR2786932B1 (fr) | 1998-12-04 | 1998-12-04 | Socle de connexion electrique, notamment pour atmosphere explosible, et son procede de fabrication |
FR98/15329 | 1998-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000035054A1 true WO2000035054A1 (fr) | 2000-06-15 |
Family
ID=9533585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002844 WO2000035054A1 (fr) | 1998-12-04 | 1999-11-19 | Socle de connexion electrique, notamment pour atmosphere explosible, et son procede de fabrication |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1053573B1 (fr) |
AU (1) | AU753861B2 (fr) |
DE (1) | DE69922636T2 (fr) |
FR (1) | FR2786932B1 (fr) |
WO (1) | WO2000035054A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0208954D0 (en) * | 2002-04-19 | 2002-05-29 | Hawke Cable Glands Ltd | An electrical connector |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2697212A (en) * | 1953-01-12 | 1954-12-14 | Sarl Arlux | Explosion-proof electrical connecting device |
FR1301448A (fr) * | 1961-07-08 | 1962-08-17 | Expl Des Procedes Marechal D | Perfectionnements aux dispositifs de connexions électriques |
US3330920A (en) * | 1965-12-02 | 1967-07-11 | Arthur I Appleton | Explosion-proof plug and receptacle with switch means |
GB2125234A (en) * | 1982-06-04 | 1984-02-29 | Bbc Brown Boveri & Cie | An explosion- or flame-proof electrical coupling |
FR2686461A1 (fr) * | 1992-01-16 | 1993-07-23 | Besso Rene | Dispositif de raccordement electrique etanche. |
-
1998
- 1998-12-04 FR FR9815329A patent/FR2786932B1/fr not_active Expired - Fee Related
-
1999
- 1999-11-19 AU AU12774/00A patent/AU753861B2/en not_active Expired
- 1999-11-19 DE DE69922636T patent/DE69922636T2/de not_active Expired - Lifetime
- 1999-11-19 EP EP99956088A patent/EP1053573B1/fr not_active Expired - Lifetime
- 1999-11-19 WO PCT/FR1999/002844 patent/WO2000035054A1/fr active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2697212A (en) * | 1953-01-12 | 1954-12-14 | Sarl Arlux | Explosion-proof electrical connecting device |
FR1301448A (fr) * | 1961-07-08 | 1962-08-17 | Expl Des Procedes Marechal D | Perfectionnements aux dispositifs de connexions électriques |
US3330920A (en) * | 1965-12-02 | 1967-07-11 | Arthur I Appleton | Explosion-proof plug and receptacle with switch means |
GB2125234A (en) * | 1982-06-04 | 1984-02-29 | Bbc Brown Boveri & Cie | An explosion- or flame-proof electrical coupling |
FR2686461A1 (fr) * | 1992-01-16 | 1993-07-23 | Besso Rene | Dispositif de raccordement electrique etanche. |
Also Published As
Publication number | Publication date |
---|---|
EP1053573B1 (fr) | 2004-12-15 |
EP1053573A1 (fr) | 2000-11-22 |
FR2786932B1 (fr) | 2000-12-29 |
DE69922636T2 (de) | 2005-05-25 |
FR2786932A1 (fr) | 2000-06-09 |
DE69922636D1 (de) | 2005-01-20 |
AU1277400A (en) | 2000-06-26 |
AU753861B2 (en) | 2002-10-31 |
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