Abstract:
a. A cable joint sealing by using normal cure composite tape seal has an insulated wire joint enveloped by insulation tape and the edges are sealed by non curable polysulphide mix. (poly paste-A) b. the said joint is covered with polyester film, the edges of the film are fixed with poly paste-A, followed by winding tightly with insulation tape, then two sides of cable surfaces are cleaned and activated by etching with xylene solvent. End seals are made around cable surface by using curable polysulphide mix. (poly paste-B) and enclosing the entire seal by winding with elastomer tape. Poly gel of curable polysulphide mix. (may or may not) coated on the entire surface and then covered by winding a flexible normal cure composite (NCCS) tape made of glass fibre impregnated with polysulphide mix having polyethylene peel off film. c. The assembly being covered either by winding with elastomer tape followed by insulation tape, and the two terminal ends are tightened by nylon tags or fibre reinforced polyester shells containing the poly paste can be fixed and tightened with nylon tags. d. The above said seal prevents water seepage, termite attacks to the cable joint under ground or under water and resists to mechanical damages.
Abstract:
A reinforcement member (1) for a cable splice is stiff yet resilient so as to attain a position of rest in which it has a substantially C-shaped cross-section leaving a longitudinal opening (2). Two such reinforcement members can be bent around the splice such that one reinforcement member closes off the opening of the other reinforcement member, thus completely surrounding the cable splice.
Abstract:
An olefinic resin composition for power cables comprising an olefinic resin and m-(t-butylperoxyisopropyl)isopropylbenzene and/or p-(t-butylperoxyisopropyl)isopropylbenzene. This composition gives a cross-linked product which is suitable for use in at least one of a semiconductive layer and an insulator layer formed around an outer periphery of a conductor of a power cable or a junction thereof to improve various high-temperature characteristics of the power cable.
Abstract:
The present invention is directed to a weather-proofing solution for protecting a cable that includes a new weather proofing sheet, a new applicator tool and a new method of installing the weather proofing material over a cable connection to provide environmental protection to the cable connection. The weather-proofing material is a preformed sheet having a body portion and two spaced apart tail portions extending longitudinally from one end of the body portion wherein the preformed sheet has a variable elongation along its length when wrapped around the cable connection under a constant force.
Abstract:
A tape (1) for enclosing and sealing an object (20), such as a cable splice, comprises both a gel layer (3) and a rubber layer (2). Due to the elastic properties of the rubber layer (2), the gel can be put under compression, resulting in an excellent sealing action. Advantageously the rubber layer (2) is wider than the gel layer (3) allowing adhesive strips (4) to be accommodated adjacent the gel so as to facilitate the application of the tape and to further improve its sealing action.
Abstract:
An insulating waterproof member for insulating and waterproofing a connector of a cable, the insulating waterproof member including: a sealing material for covering the connector, and a protective sheet for covering the connecting portion with the sealing material interposed therebetween, the protective sheet having an adhesive layer on a surface on a sealing material side, wherein the protective sheet includes a body portion for covering the connector and an extending portion that extends in a first direction from the body portion, and the extending portion allows pressure to be imparted to the sealing material and the body portion that cover the connector in a first region at a first end side of the body portion in a second direction that intersects the first direction, in a second region at a second end side of the body portion, and in a third region between the first region and the second region.
Abstract:
A reinforcement member (1) for a cable splice is stiff yet resilient so as to attain a position of rest in which it has a substantially C-shaped cross-section leaving a longitudinal opening (2). Two such reinforcement members can be bent around the splice such that one reinforcement member closes off the opening of the other reinforcement member, thus completely surrounding the cable splice.
Abstract:
A cable splice closure (10) includes an elongated strip (12) of flexible material having opposed edges (12a, 12b). The strip (12) is helically wound so that one of the opposed edges (12a) contacts the other opposed edge (12b) in interlocking engagement. The helically wound interlocked strip (12) is conformable to various shapes upon twisting of the strip (12). In addition to the mechanical interlock of the edges, provision is made to seal the edges (12a, 12b) by fusion bonding. The mechanical interlock is carried out by a tongue (22) and a groove (24) arrangement in which a tongue (22) is engaged in an oversized groove (24). As a result, space is available in the groove (24) for a bonding material to fuse the edges (12a, 12b) of the strip (12) and form a sealed enclosure (10).
Abstract:
A forced encapsulation system that can be advantageously used to encapsulate cable splices, e.g., multiconductor communications cables. Containment means are formed around a substrate comprising part of at least one cable, and secured to the cable, thereby forming an enclosure into which liquid encapsulant can be introduced and in which the encapsulant can be pressurized and maintained at pressure above ambient pressure. In a preferred embodiment, the containment means comprise a containment bag formed in situ from an elastomer sheet and sealed to the cable sheaths, with a reenforcing outer enclosure surrounding the containment bag. Pressurizing the liquid encapsulant leads to thorough penetration of the encapsulant into the splice work and cable ends and to intimate contact between the cured encapsulant and the surfaces within the enclosure, including surfaces with which the encapsulant does not form an adhesive bond, resulting in improved gasketing around conductors, thereby reducing the possibility of water-caused splice damage.