EP0586799B1 - Dispositif pour la fixation de câble pour pompe - Google Patents

Dispositif pour la fixation de câble pour pompe Download PDF

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Publication number
EP0586799B1
EP0586799B1 EP93109349A EP93109349A EP0586799B1 EP 0586799 B1 EP0586799 B1 EP 0586799B1 EP 93109349 A EP93109349 A EP 93109349A EP 93109349 A EP93109349 A EP 93109349A EP 0586799 B1 EP0586799 B1 EP 0586799B1
Authority
EP
European Patent Office
Prior art keywords
transverse wall
sides
sleeve
cable
pins
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.)
Expired - Lifetime
Application number
EP93109349A
Other languages
German (de)
English (en)
Other versions
EP0586799A1 (fr
Inventor
Kurt Werner Arnswald
Manfred Zelder
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.)
Wilo GmbH
Original Assignee
Wilo GmbH
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
Application filed by Wilo GmbH filed Critical Wilo GmbH
Publication of EP0586799A1 publication Critical patent/EP0586799A1/fr
Application granted granted Critical
Publication of EP0586799B1 publication Critical patent/EP0586799B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel
    • H01R13/746—Means for mounting coupling parts in openings of a panel using a screw ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2107/00—Four or more poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/20—Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart

Definitions

  • the invention relates to a device for attaching and connecting a multi-core electrical cable to an outer wall of a device, in particular the motor of a submersible pump, wherein a tubular connection housing of the device is fastened in an opening that is open to the outside in the device, in particular is screwed in and one is transverse to the longitudinal axis of the connection housing has arranged watertight transverse wall in which conductive pins are cast, which project axially parallel on both sides of the transverse wall and on each of which sockets are plugged, which are connected on the device side with wires of the device and on the outside with wires of a connecting cable.
  • US-A-4 420 210 and FR-A-1 240 190 show hermetically sealed electrical connectors for attaching and connecting a multi-core electrical cable to an outer wall of a device, the tubular connector housing of the connectors in an outwardly open opening in the device is screwed in.
  • the conductive pins are melted into glass or ceramic.
  • the melting method is extremely complex and expensive.
  • the object of the invention is to provide a fastening device of the type mentioned which, with simple construction and assembly, has a high level of tightness against creeping longitudinal water and thereby allows loosening for multiple connections.
  • the watertight transverse wall is made of synthetic resin, that the transverse wall is cast into a sleeve coaxially surrounding the transverse wall and that the sleeve is fastened watertight to the inner wall of the connection housing.
  • connection device or such a cable connector creates a releasable connection of the connection cable to the electric motor. It is one Repeated connection possible, so that the customer or user can use and connect different types of cables. This also ensures a high level of tightness against creeping longitudinal water and even explosion protection, ie engine sparks cannot ignite external gas.
  • connection device With simple construction, assembly and disassembly, the detached cable ends are not changed when the cable is loosened, in particular during a repair, so that a new connection can be carried out easily.
  • the device has the same parts on both sides of the transverse wall, so that only a few parts can be produced. Modifications to the motor housing are not necessary since additional holes, bores and fastenings, in particular flanges, are not required. It is particularly advantageous that the connection device according to the invention uses the same parts for connections with required explosion protection as well as without this requirement, so that no two different constructions are required. There is a multiple function, since in particular the connection housing represents the receiving body for the connector and simultaneously connects the motor housing and bearing bracket.
  • the dry motor interior In the case of submersible motors, the dry motor interior must be checked for leaks once the cable has been disconnected. When the cable is reconnected, leaks can occur which lead to leakage and destruction of the motor.
  • the interior of the engine In the type of construction according to the invention, the interior of the engine is not touched. It remains watertight, even if the engine were immersed in water without a cable. Checking the engine for leaks is called "pressing". This impression is a special step and is time-consuming. You submerge the engine into a filled water basin and pressurize it with compressed air of approximately 1.5 bar on the inside via a pressure nipple. Then you observe those places that could be leaking. At these points, air comes out in the form of pearls that rise in the water. In the construction according to the invention, this test procedure is omitted if a cable was subsequently detached.
  • the cable entry is often potted with resin. It is therefore necessary to either carry out the potting again in a further connection or to use a so-called prefabricated cable, the end of which already carries the potting compound. In this case, it is a cable that the customer must obtain from the supplier. If the motors and pumps are explosion-proof, the customer cannot change the cables anyway, but must obtain the explosion-protected components (they can be cast resin parts). In the design according to the invention, the functions of longitudinal water tightness and explosion protection are separated from the cable and housed separately in the motor.
  • a particularly simple and tight construction against creeping longitudinal water and against pressurized water is given when the transverse wall is surrounded by a coaxial sleeve, into which the transverse wall is cast and which is fastened watertight to the inner wall of the connection housing.
  • the tightness is further improved if there is a sealing washer on one side of the transverse wall, which is penetrated by the pins.
  • a constructional simplicity and easy assembly is achieved if the bushings on both sides of the Insert the transverse wall in a two-part bearing part (plug-in part), which forms a guide channel for each bushing sleeve.
  • one half of the bearing part can be latched with a central, coaxial, projection-forming projection in a central opening of the other half.
  • the bearing part forms a plug-in part together with the inserted sleeve sleeves into which the cable wires (wires) lead on one side and which can be plugged onto the pins with its other end.
  • an identical plug-in part can be plugged onto the pins on both sides of the transverse wall.
  • an axially parallel or coaxial guide pin which protrudes on both sides, is cast in the transverse wall and lies in each case in a bore in the bearing part.
  • an easy-to-assemble construction with a secure hold is created if a threaded sleeve is screwed into the outside of the connection housing, which with its external thread lies in an internal thread of the connection housing, through which the connection cable including the cable jacket is guided and which is closed on the outside by a ring nut.
  • the housing 1 of a pump motor in particular a submersible pump with a canned tube, has a bore 2 which merges into a coaxial threaded bore 3 in the bearing bracket 4 of the electric motor.
  • a connector housing 5 with its external thread is screwed into the threaded bore 3.
  • the tubular connection housing 5 is thus partly inserted into the motor or the bearing bracket 4 and has an outer ring or outer flange 6 with which the motor housing wall 7 is overlapped, so that when the connection housing 5 is screwed in, the motor wall is screwed to the bearing bracket is, between the parts 4 and 7, a sealing ring 8 is inserted, which creates a tightness between the connector housing, motor housing and bearing bracket.
  • connection housing 5 there is a sleeve 9 coaxially on the inside, which is fastened, in particular cast, to the inner wall of the connection housing 5.
  • a transverse wall 10 made of synthetic resin is cast into the sleeve 9, in which a plurality of metal conductive pins 11 are cast in the direction parallel to the axis of the housing 12. The pins project with one end on either side of the transverse wall 10.
  • a guide pin 13 is cast in the transverse wall, which also protrudes on both sides of the transverse wall 10 and has a larger diameter than the pins 11.
  • the sleeve 9 forms, together with the transverse wall 10 and the pins 11, 13, a double-sided double socket, into which plug-in parts 14 are inserted on both sides, which have an identical design.
  • Each plug-in part has a two-part bearing part 15, of which the first bearing part half 16, which is closer to the transverse wall 10, has guide bores 17 all around, into which several Socket sleeves 18 are inserted.
  • the bushing sleeves protrude beyond the first bearing part half 16 into bores 19 of a second bearing part half 20.
  • the first bearing part half 16 has a central coaxial projection 21 with a plurality of tongues 22 which are inserted into a central opening 23 of the second bearing part halves 20 and engage behind them in a latching manner.
  • wires or wires 24 of the connecting cable 25 or the wires / wires 26 of the motor connecting wires 27 are fastened in the sockets 18, so that the respective plug-in part 14 is fastened to the connecting cable 25 or to the motor connecting wires 27 on both sides of the transverse wall 10.
  • a rubber washer 28 which is penetrated by the pins 11 and 13 and represents an additional improvement in the seal against longitudinal water.
  • This rubber washer can also be arranged on both sides of the transverse wall 10.
  • the connecting cable 25 is inserted on the side of the connecting device facing the motor through a threaded sleeve 29, which is screwed with its external thread into an internal thread 30 of the connection housing 5.
  • the threaded sleeve 29 consists of an elastomer and can be compressed all around in radial directions at the end facing away from the motor by means of an externally screwed-on ring nut 30. By screwing this ring nut 30, the outer jacket of the connecting cable 25 is tightened by the threaded sleeve 29.

Claims (9)

  1. Dispositif pour la fixation et de raccordement d'un câble électrique multifilaire (25) à une paroi extérieure d'un appareil (1), en particulier du moteur d'une pompe à moteur submersible, un boîtier de raccordement tubulaire (5) du dispositif étant fixé, en particulier vissé, dans une ouverture ouverte vers l'extérieur dans l'appareil (1) et présentant intérieurement une paroi transversale (10) étanche à l'eau disposée transversalement à l'axe longitudinal du boîtier de raccordement (5), paroi dans laquelle font corps des broches conductrices (11) qui font saillie parallèlement à l'axe des deux côtés de la paroi transversale (10) et sur lesquelles des douilles (18) sont montées respectivement des deux côtés, lesquelles sont reliées à des conducteurs (26) de l'appareil du côté appareil et à des conducteurs (24) d'un câble de raccordement (25) du côté extérieur,
    caractérisé en ce que la paroi transversale (10) étanche à l'eau est en une résine synthétique,
    que la paroi transversale (10) fait corps dans une douille (9) entourant coaxialement la paroi transversale (10) et que la douille (9) est fixée de manière étanche à l'eau à la paroi intérieure du boîtier de raccordement (5).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que la douille (9) forme avec la paroi transversale (10) et les broches (11,13) une douille double des deux côtés.
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que, sur un côté de la paroi transversale (10) ou les deux est en appui un disque d'étanchéité (28) qui est traversé par les broches (11, 13).
  4. Dispositif selon l'une des revendications précédentes,
    caractérisé en ce que les douilles (18) sont logées des deux côtés de la paroi transversale (10), respectivement, dans une pièce d'appui (15) en deux parties qui forme pour chaque manchon de douille (18) un canal de guidage (17, 19).
  5. Dispositif selon la revendication 4,
    caractérisé en ce qu'une moitié (16) de la pièce d'appui (15) est fixée à encliquetage, par une saillie (21) formant des languettes d'encliquetage (22) centrales coaxiales, dans une ouverture centrale (23) de l'autre moitié (20).
  6. Dispositif selon la revendication 4 ou 5,
    caractérisé en ce que la pièce d'appui (15) forme, avec les manchons de douilles (18) logés dedans, une pièce enfichable (14) dans laquelle, d'un côté, les fils de câble (conducteurs) (24, 26) sont guidés vers l'intérieur et qui, par son autre extrémité, peut être enfichée sur les broches (11, 13).
  7. Dispositif selon la revendication 6,
    caractérisé en ce qu'une pièce enfichable (14) de même construction peut être enfichée sur les broches (11) des deux côtés de la paroi transversale (10).
  8. Dispositif selon l'une des revendications précédentes,
    caractérisé en ce qu'une broche de guidage (13) parallèle à l'axe ou coaxiale, en saillie des deux côtés, fait corps dans la paroi transversale (10) et est logée dans respectivement un alésage de la pièce enfichable (14).
  9. Dispositif selon l'une des revendications précédentes,
    caractérisé en ce que, dans le boîtier de raccordement (5), est vissée extérieurement une douille filetée (29), qui est logée par son filetage dans un taraudage du boîtier de raccordement (5), par laquelle le câble de raccordement (25), y compris la gaine de câble, est guidé et qui est fermée extérieurement par un écrou à anneaux (30).
EP93109349A 1992-09-09 1993-06-11 Dispositif pour la fixation de câble pour pompe Expired - Lifetime EP0586799B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4230138 1992-09-09
DE4230138A DE4230138A1 (de) 1992-09-09 1992-09-09 Kabelbefestigungsvorrichtung für eine Pumpe

Publications (2)

Publication Number Publication Date
EP0586799A1 EP0586799A1 (fr) 1994-03-16
EP0586799B1 true EP0586799B1 (fr) 1996-05-08

Family

ID=6467592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109349A Expired - Lifetime EP0586799B1 (fr) 1992-09-09 1993-06-11 Dispositif pour la fixation de câble pour pompe

Country Status (3)

Country Link
US (1) US5362258A (fr)
EP (1) EP0586799B1 (fr)
DE (2) DE4230138A1 (fr)

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Also Published As

Publication number Publication date
EP0586799A1 (fr) 1994-03-16
DE59302500D1 (de) 1996-06-13
DE4230138A1 (de) 1994-03-10
US5362258A (en) 1994-11-08

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