Electricity: conductors and insulators – Conduits – cables or conductors – Combined
Patent
1993-03-09
1995-03-21
Nimmo, Morris H.
Electricity: conductors and insulators
Conduits, cables or conductors
Combined
174 38, 174 39, 174 77R, 174 92, H02G 1510
Patent
active
053998111
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a device for sealing cables entering a cable coupling sleeve, and in particular to such a device comprising a multi-element sealing plate which contains openings for insertion of cables, and which also provides a seal between the openings and the cables.
The shape of a cable coupling sleeve depends on the type of cable joint to be enclosed. Where the joint is a simple in-line joint between two wires or cables, a sleeve or tubular device may be used. Where a main cable is to be divided into many smaller cables a dome shaped housing may be used. Such a dome-shaped housing typically has a base through which a loop of an uncut main cable is inserted and through which a plurality of smaller wires or cables leave, the smaller wires or cables being spliced in the housing to the main cable.
EP 0094848 describes a dome shaped housing with a base as described above. The base comprises heat shrinkable outlets extending into or out of the housing which can be shrunk onto the cables to seal them.
DE 2427677 describes a base which can form part of a cable coupling sleeve, which base, as in the present invention, comprises a multi element, mechanical sealing plate. The device disclosed therein consists substantially of three plate elements, which fit together to provide three circular openings between adjacent pairs of plates, which openings act as feedthrough regions for entering cables. The three plate elements of the device have such a shape that each feedthrough opening is divided centrally that is half of its periphery is provided by one plate, and half by another plate. The plates are tightened towards one another by screw connections. In order to produce the cable feedthrough openings in the plates, they may be cut or drilled in.
While the known mechanical sealing arrangement described in DE 2427677 has a number of advantages, because of the nature of its construction it also has a considerable disadvantage, in that there is a limit to the number of openings that can be produced between abutting parts of adjacent plates. Also the number of openings are limited if an uncut main cable is to be introduced. Furthermore it is not possible to vary the sealing tightness on the individual inserted cables since tightening of the plates acts on all the cables.
GB 1603626 describes an assembly for protecting a splice between cables comprising a longitudinally split tube in the form of half shells and two blocks positioned on either side of the splice, within the longitudinally split tube, each block containing channels for receiving cables. Sealant damming means biased to act outwardly against the channels may be included, and individual cables may be wrapped with adhesive tape before insertion into the channels
An object of the present invention is to provide a solution whereby a plurality of cables can be introduced in the cut or uncut state into a cable coupling sleeve. Another object of the invention is to provide a solution so that the number of incoming and outgoing cables to the cable coupling sleeve can be altered, subsequent to the initial installation, without any problems.
The present invention provides a device for sealing a cable joint, comprising: regions into which cables can be laid; opening regions in the inner element to enhance the seal between the opening regions in the element and the cables led therethrough; and element and which can be moved towards the inner element to form divided cable openings containing within them the cable and the sealing means and which can be moved away from the inner element to allow insertion or removal of the cables, the outer circuit elements being tightenable towards each other by a tightening device, to seal the cables between the inner element and the outer circuit elements is formed between the sealing plate and the cable coupling housing.
The cables can be inserted in use into the sealing means that is positioned in the device. As an alternative, the cables can be contained within the sealing material as it is positioned in the openings in th
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Fremgen Dieter
Papenheim Friedbert
Burkard Herbert C.
Nimmo Morris H.
Walter Rose GmbH & Co. KG
Zahrt II William D.
Zavell A. Stephen
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