EP0763872A1 - Kabelmuffe - Google Patents

Kabelmuffe Download PDF

Info

Publication number
EP0763872A1
EP0763872A1 EP96202571A EP96202571A EP0763872A1 EP 0763872 A1 EP0763872 A1 EP 0763872A1 EP 96202571 A EP96202571 A EP 96202571A EP 96202571 A EP96202571 A EP 96202571A EP 0763872 A1 EP0763872 A1 EP 0763872A1
Authority
EP
European Patent Office
Prior art keywords
coupling device
mass
block
housing
core
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
EP96202571A
Other languages
English (en)
French (fr)
Other versions
EP0763872B1 (de
Inventor
Bernard Louis Brus
Jan Simon Van Den Hout
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.)
Lovink-Terborg BV
Original Assignee
Lovink-Terborg BV
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 Lovink-Terborg BV filed Critical Lovink-Terborg BV
Publication of EP0763872A1 publication Critical patent/EP0763872A1/de
Application granted granted Critical
Publication of EP0763872B1 publication Critical patent/EP0763872B1/de
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
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/031—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for multiphase cables, e.g. with contact members penetrating insulation of a plurality of conductors

Definitions

  • a cable sleeve is known in diverse embodiments. It serves to connect a branch cable with a plurality of cores to a for instance continuous main cable with a corresponding plurality of cores or to mutually connect two main cables.
  • the invention generally provides a coupling device for mutually connecting for electrical conduction at least two cores, each forming part of an electricity cable, which device comprises an electrically conducting block with sharp protrusions such that, by exerting a force on the insulating sheath extending round a first core with these protrusions by means of clamping means forming part of the device, this sheath is perforated and the block comes into and remains in conducting contact with the core; coupling means for electrically connecting a second core to that block; and
  • a preferred embodiment has the special feature that the block forms part of a first clamping jaw, which can co-act clampingly with a second clamping jaw by means of operating means.
  • a specific embodiment has the further special feature that the coupling means comprise a second electrically conducting block to which a second core can be coupled for electrical conduction, which second block is coupled to the first block for electrical conduction.
  • a preferred embodiment has the characteristic that the housing comprises two shells and at least one of the blocks is fixedly coupled to one of the shells.
  • This embodiment has the advantage that the number of individual components is limited, which facilitates assembly. It is noted in this respect that it is generally recommended to couple only one of the blocks fixedly to the shells. In this manner the two blocks can be placed in advance into clamping operative position by the clamping means. The second shell is subsequently placed over the first shell and held in this position by screwing means, clamping means or the like. Closing of the housing is thus fully independent of the action of the clamping means which is after all essential for a good electrical contact.
  • a particular variant has the special feature that the housing consists of metal, for instance cast iron or cast aluminium, and the or each conducting block is arranged in electrically insulating manner relative to the housing.
  • the housing consists of an electrically insulating material, for instance plastic optionally reinforced with fibres, such as polyurethane, ABS, polystyrene.
  • the coupling device according to the invention can be embodied such that after assembly it is filled with an insulating filling mass.
  • This filling mass can for instance consist of polyurethane. It is of importance that the filling mass adheres well to the parts arranged in the housing. This adhesion can be made worse in that during mounting of the device dirt and grease is transferred to the various components via the hands of the fitter. Grease in particular prevents a good adhesion.
  • the relevant surfaces in any case remain clean and the filling mass can adhere well thereto.
  • the cable cores are physically separated from each other by insulating partitions in the region of the blocks.
  • These partitions can form part of a jaw in which the blocks are arranged and, insofar as a physical separation between the cores in different jaws is desired, can be separated by a separate partition.
  • a specific embodiment comprises an electrically insulating mass arranged in one of the shells.
  • This variant can advantageously be embodied such that the said mass is integrated with the shell or forms a whole therewith.
  • the coupling device has the special feature that the said mass is thermoplastic.
  • This latter embodiment can be embodied such that the said mass is a foam mass with closed skin.
  • PE polyethylene
  • thermosetter Yet another embodiment has the special feature that the said mass is a thermosetter.
  • reaction injection moulding is a technique in which two mutually co-acting chemical components are mixed in an injection moulding machine prior to injection. Curing takes place in the mould cavity of a mould for a time interval of for instance 2-10 minutes. This technique is directed particularly at the use of thermocuring materials for the said components.
  • a particular embodiment of the coupling device has the special feature that the protrusions extend in rows extending in longitudinal direction.
  • the number of rows can in principle be chosen as desired. The best results up to the present time have been realized with an embodiment in which the number of rows amounts to two.
  • the protrusions must comply with the requirements relating to conductance, low transfer resistance, hardness and resistance to wear.
  • a particular embodiment has the feature that the protrusions consist of brass with a coating of tin.
  • a preferred embodiment has the characteristic that the clamping means comprise a plastically deformable first element.
  • the use of such a plastically deformable element has the advantage that after the perforation of the insulating sheath round said first core the pressure force remains substantially constant after a yield threshold of the plastically deformable first element has been exceeded, while the clamping means can nevertheless still undergo a further continuous displacement.
  • Use is preferably made however of a combination of said plastically deformable first element with an embodiment in which the clamping means comprise an elastically deformable second element.
  • This elastically deformable second element must effect the desired normal pressure force. Also when creep occurs, i.e. continuous deformation at constant load, the desired pressure force by the clamping means is always assured in this manner.
  • a practical embodiment has the special feature that the second element comprises a package of cup springs. It is noted that other compression springs can also be considered suitable.
  • a package of cup springs has the advantage of a small axial dimension.
  • a specific embodiment has the special feature that the first element comprises a tube structure which can yield in longitudinal direction under pressure.
  • a tube has a relatively great strength in the case of pressure load in longitudinal direction.
  • the tube structure must therefore be adapted such that it yields at a desired pressure in longitudinal direction.
  • the tube structure can for instance have a plurality of peripheral grooves.
  • the tube structure can be provided on at least one of its ends with a beaded edge which can co-act for instance with a corresponding shaping surface. In said cases a plastic deformation takes place when a certain axial force is exceeded.
  • the first element comprises a deformable mass, for instance a paste arranged in an encapsulation, or a yieldable mass, for instance consisting of plastic or lead.
  • a deformable mass for instance a paste arranged in an encapsulation
  • a yieldable mass for instance consisting of plastic or lead.
  • the drawback to thermoplastic plastics in particular is that yielding already takes place at very slight pressure.
  • the coupling device serves to connect for electrical conduction main cores 2, 3, 4, 5 of a main cable 6 to respective branch cores 7, 8, 9, 10 of a branch cable 11.
  • main cable 6 and branch cable 11 the insulating sheath construction which encases the respective insulating cores 2, 3, 4, 5 and 7, 8, 9, 10, is omitted for the sake of clarity.
  • the coupling device comprises a lower clamping jaw 12 and an upper clamping jaw 13.
  • these clamping jaws are received respective stainless steel blocks 14, 15 and 16, 17. These blocks have sharp protrusions with which they can perforate the insulating sheaths of cores 2-5.
  • the clamping jaws 12, 13 can be urged with force toward each other by means of screws 18, 19.
  • the lower clamping jaw 12 comprises four connecting blocks 20, 21, 22, 23 for electrical connecting thereto of branch cores 7, 8, 9, 10 by means of screws (not shown). These blocks 20-23 can also be manufactured from any suitable electrically conducting material, for instance copper, aluminium, stainless steel. Connecting blocks 20-23 are each connected by means of electrical conductors 24, 25, 26, 27 to a corresponding block 14-17. The conductors 24 and 27 mutually connect the clamping jaws 12 and 13 and therefore protrude, particularly in the situation shown in figure 3, outside the structure of clamping jaws 12, 13.
  • connecting blocks 20-23 can also be dispensed with.
  • Use can be made here of clamping or screwing provisions which are arranged directly on the blocks 14, 15, 16, 17, using which provisions the branch cores 7-10 can be coupled directly to blocks 14-17 instead of via conductors 24-27 and connecting blocks 20-23.
  • the blocks 14 and 15 respectively the blocks 16 and 17 are directed with sharp protrusions 28 toward a cavity, generally designated with 29, in which the four main cores 2-5 fit, mutually separated by vertical partitions 30, 31 which form part of the respective jaws 12 and 13 and a separate horizontal partition 32 consisting for instance of foam material.
  • the clamping jaws 12, 13 are carried toward each other and definitive fixation takes place by tightening the screws 18, 19. Due to this action the protrusions 28 penetrate into the conductive centre of the cores 2-5, whereby the blocks 14-17 and therewith blocks 20-23 come into conductive contact with these cores 2-5.
  • the branch cores 7-10 are connected for electrical conduction to these blocks 20-23 by screwing means generally designated with 33.
  • the lower clamping jaw 12 is received as according to figure 1 in a lower shell 34.
  • an upper shell 35 is coupled sealingly to lower shell 34 after electrical assembly as described above.
  • screwing means By means of screwing means (not shown) the shells are permanently connected to one another.
  • a filling opening 37 which can be closed off by means of a screw 36, the cavity in housing 34, 35 can be filled with an insulating mass 38.
  • FIG. 5 shows a cable sleeve or coupling device 51 according to the invention.
  • This comprises a housing, comprising a lower shell 52 and an upper shell 53. These shells are substantially mutually symmetrical.
  • the upper shell 53 comprises a filling opening closable by a screw cap 54 for filling the closed housing 52, 53 with an insulating mass.
  • Figure 6 shows the internal parts of cable sleeve 51. These internal parts comprise a lower clamping jaw 55 and an upper clamping jaw 56.
  • the lower clamping jaw 55 comprises blocks 14' and 15'; the upper clamping jaw 56 comprises blocks 16', 17'. These correspond functionally with blocks 14, 15, 16, 17 in coupling device 1, but differ therefrom in the sense that the protrusions 28 of each block are ordered in two instead of four rows extending in longitudinal direction.
  • the clamping screws 18, 19, which serve to urge clamping jaws 55, 56 toward each other, are not shown.
  • Blocks 14' and 15' are positioned fixedly relative to lower clamping jaw 55.
  • Blocks 16' and 17' are coupled to upper clamping jaw 56 via respective deformable elements 57, 58. These elements 57, 58 are shown in figure 9 which will be discussed hereinbelow.
  • the four cable cores 2, 3, 4, 5 are mutually separated by a cross-shaped separation structure 58.
  • the device 1 is embodied such that the lower clamping jaw comprises the four connecting blocks 20, 21, 22, 23 for coupling of the branch cores 7, 8, 9, 10.
  • the device 51 is embodied such that each clamping jaw 55, 56 can be coupled directly to the respective branch cores. Since it will be apparent after studying the coupling device 1 in which manner the desired coupling can be effected, this coupling is not shown in detail in figures 5 and 6.
  • Figures 7, 8, 9, 10 show deformable structures, which comprise an elastically deformable element as well as a plastically deformable element.
  • Use is made in all cases of a package of cup springs 59 as elastically deformable element, wherein the number of springs determines the spring constant. This latter is ultimately decisive for the pressure force with which the protrusions 28 press into a cable core.
  • the package of cup springs 59 co-acts in all four cases with a relatively easily yielding structure.
  • a housing 60 in which is situated a paste 61.
  • the embodiment according to figure 8 has a generally tubular structure 62 having a rotation-symmetrical form with a plurality of ribs. When a pressure force 63 is exerted the tube structure 62 will display a deformation pattern schematically designated with arrows 64.
  • the embodiment of figure 9 is likewise provided with a tubular structure 65 having on its ends respective beaded edges 66, 67. These co-act with a shaping block respectively 68, 69 with respective annular grooves. As the pressure force 63 is exerted when the clamping screws 18, 19 (not shown) are tightened, deformation will take place as symbolically designated with arrows 70, 71. This deformation is of a plastic nature and ensures that the pressure force with which the tin-coated brass protrusions 28 press into a cable core remains substantially constant.
  • the embodiment according to figure 10 comprises a plastically deformable element in the form of a mass 72, consisting of thermoplastic plastic or lead.

Landscapes

  • Flexible Shafts (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Cable Accessories (AREA)
  • Multi-Conductor Connections (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
EP96202571A 1995-09-14 1996-09-16 Kabelmuffe Expired - Lifetime EP0763872B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1001192 1995-09-14
NL1001192A NL1001192C2 (nl) 1995-09-14 1995-09-14 Kabelmof.

Publications (2)

Publication Number Publication Date
EP0763872A1 true EP0763872A1 (de) 1997-03-19
EP0763872B1 EP0763872B1 (de) 2002-02-13

Family

ID=19761572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96202571A Expired - Lifetime EP0763872B1 (de) 1995-09-14 1996-09-16 Kabelmuffe

Country Status (5)

Country Link
EP (1) EP0763872B1 (de)
AT (1) ATE213362T1 (de)
DE (1) DE69619178T2 (de)
ES (1) ES2172630T3 (de)
NL (1) NL1001192C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856568B4 (de) * 1998-02-17 2008-11-20 Nexans Verbindungselement für eine Verzweigung von elektrischen Kabeln

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2228273A1 (de) * 1972-06-09 1973-12-20 Schiffmann Gmbh Alois Kabelmuffe
EP0292414A1 (de) * 1987-05-20 1988-11-23 Societe Industrielle De Materiel Electrique Simel Verbindungsvorrichtung zum Anschliessen von Abzweigleitern an im Erdreich verlegten Hauptkabeln
FR2645683A1 (fr) * 1989-04-10 1990-10-12 Mars Actel Boite de raccordement pour branchement de cables de derivation sur un cable principal
EP0405539A1 (de) * 1989-06-30 1991-01-02 Cableries De Lens Wasserdichtes Abzweigungsgehäuse für Niederspannungsleistungskabel
EP0512923A1 (de) * 1991-05-10 1992-11-11 S I C A M E Societe Industrielle De Construction D'appareils Et De Materiel Electrique Auf einem abzuzweigenden Kabel anzubringende Abzweigdose, insbesondere für ein unterirdisches Netz

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2228273A1 (de) * 1972-06-09 1973-12-20 Schiffmann Gmbh Alois Kabelmuffe
EP0292414A1 (de) * 1987-05-20 1988-11-23 Societe Industrielle De Materiel Electrique Simel Verbindungsvorrichtung zum Anschliessen von Abzweigleitern an im Erdreich verlegten Hauptkabeln
FR2645683A1 (fr) * 1989-04-10 1990-10-12 Mars Actel Boite de raccordement pour branchement de cables de derivation sur un cable principal
EP0405539A1 (de) * 1989-06-30 1991-01-02 Cableries De Lens Wasserdichtes Abzweigungsgehäuse für Niederspannungsleistungskabel
EP0512923A1 (de) * 1991-05-10 1992-11-11 S I C A M E Societe Industrielle De Construction D'appareils Et De Materiel Electrique Auf einem abzuzweigenden Kabel anzubringende Abzweigdose, insbesondere für ein unterirdisches Netz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856568B4 (de) * 1998-02-17 2008-11-20 Nexans Verbindungselement für eine Verzweigung von elektrischen Kabeln

Also Published As

Publication number Publication date
DE69619178D1 (de) 2002-03-21
DE69619178T2 (de) 2002-10-31
EP0763872B1 (de) 2002-02-13
ATE213362T1 (de) 2002-02-15
NL1001192C2 (nl) 1997-03-20
ES2172630T3 (es) 2002-10-01

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