TRANSITION, PREFERABLY FOR ELECTRIC CABLES, AND METHOD FOR THE ASSEMBLY OF SUCH A TRANSITION

Abstract: A transit, preferably for electric cables, comprising a plurality of cable transit elements (8, 12,13, 16, 17) which are included in a cable transit frame (7a), and which are so adapted that they embrace a plurality of cables (9, 14) extending through the cable transit, or plugs (10, 15) which define temporary closing of cable openings. In order to arrive at a transit comprising fewer components for thereby giving a more stable construction, a simpler mounting, a simpler remounting and fewer sealing surfaces, it is according to the invention suggested that the cable transit elements comprise a combination of uniterrupted plates (8, 13, 17) having recesses (8a, 13a, 17a) for the through-going of cables, as well as individual elements (12, 16) adapted to the respective recesses (8a, 13a, 17a) in the plate or plates (8, 13, 17). The alteration between the uniterrupted plates and the individual elements is preferably made such that the cables ''rest'' on the plates, whereas the individual elements embrace the cable and/or plugs at the upper side thereof. Such a cable transit renders a favourable method for the pulling of cables (9, 14), especially when most of or all of the uniterrupted plates (8, 13, 17) are put in position at first and thereby define guidings for the pulling, which thereby is not bound by a special sequence.

Description: Transition,preferably for electric cables,and method for the assembly of such a transition The present invention relates to a transit, preferably for electric cables, comprising a plurality of cable transit elements which are included in a cable transit frame, and which are so shaped that they embrace a plura¬ lity of cables extending througt the cable transit, or plugs which define a temporary closure of cable openings. The invention also relates to a method for assembling such cable transi-t. There are previously known cable transits which comprise a plurality of cable transit elements, see for example Norwegian Patent Application 85.3167. According to this known technique there is during the assembly of the cable transit, firstly mounted a plurality of various cable transit elements at the bottom of the frame which em- brases the cable transit. On this plurality of cable transit elements there are mounted lower halves of furt¬ her cable transit elements which are to embrace the cables or plugs which thereafter are put into position in the transit. After the first row of cables has been put in position on the further elements, corresponding halves are put into position on top on the cables, whereafter side sections and another row of individual halves are put into position for the next row of cables and/or plugs . In other words there are according this technique used a large number of individual elements for putting together such transits, which includes much preliminary work as regards the preparation of the individual elements for the fitting thereof to each other and to the plugs or cables which are to be put into the transit. From SE publication 366614 there is described a cable transit comprising filling-in elements, but these have a Aπi S MM A'S 10000 03.87 limited extention and is positioned uppermost and lower¬ most in the cable transit. Further, it is in this Patent publication discussed a vertical guiding means, but this is composed of a series of elements. SE Patent publication 414439 refers to transversally extending supporting elements having a width correspond¬ ing to the width of a cable transit, the supporting ele¬ ments being adapted to be pressed against end flanges of pipe-shaped electric cable embrasing elements for the implementation of a gas tight transit. From DE Patentpublication 3219-775 there is known a pack¬ ing element having a plurality of rececces , there being between the rececces provided cuttings which uppermost merge into hinges in the form of short webs which easily can be cut through for the forming of individual ele¬ ments . The object of the present invention is to give instruc¬ tions for a new cable transit which reduces the number of individual elements of which previously known cable tran¬ sits are composed. The invention is also aiming for pro¬ viding a cable transit which renders a more stable con¬ struction, which is simpler to mount, simpler to dis¬ mount, and which render fewer sealing surfaces for the finished composed transit. According to the invention the above problem is solved in conntection with a transit of the type mentioned in the preamble, by the fact that the cable transit elements comprise a combination of uninterrupted plates having rececces for cable transition, as well as individual ele¬ ments adapted to the individual rececces in the plate. Preferably, the uninterrupted plates might extend from the one side edge of the cable transit frame to the other side edge. Amβ S. wK A/S 10000 0387 Thereby is achieved a transit including few individual elements, including the advantages as indicated above, and at the same time there is achieved a simple exchange of cables and/or plugs by means of few individual ele¬ ments. Thus in a preferred embodiment of the transit according to the invention there is achieved a combination of uninterrupted plates and individual elements alternating in the upward direction of the frame, there being arr¬ anged a first uninterrupted plate at the bottom of the frame, whereas above the plate there is provided a first set of individual elements which are adapted to the plate below and together therewith defining transitions for a first horisontal row of cables and/or plugs, and that above the first set of individual elements there is posi¬ tioned another uninterrupted plate, and on top of the latter another set of individual elements which define transitions for another horisontal row of cables and/or plugs, etc . By this combination of uninterrupted plates and individ¬ ual elements it might be appropriate to apply the techni¬ que which is discussed in Norwegian Patent Application 85.3167, i.e. in that the uninterrupted plates as well as the individual elements comprise a narrow portion of resilient materiale which upon clamping of the plates and the elements in the frame will expand in the frame plane for sealing against cable and/or plugs and adjacent cable transit elements. This technique is especially favourable for the acheive- ment of a gas tight and water tight cable transit based on a minimum number of transit elements included in the transit. A method for assembling a transit, preferably a cable transit comprising a plurality of cable transit elements which are included in a cable transit frame, will thus in ArπeS M»_A/S 1000003.87 accordanse with the present invention comprise the following steps: a) that in the bottom of the frame there is placed a first uninterrupted plate with rececces for the mounting of cables and/or plugs, b) that thereafter there is pulled a first row of cables which are put into position in individual rececces in the plate and/or there are put into position one or more plugs in a respective rececc, c) that above the first row of cables and/or plugs there is mounted a first set of individual elements adapted to the individual rececces and the contents thereof, d) that above the first set of individual elements there is placed another uninterrupted plate which is adapted to the first set of individual elements, and which is provided with rececces for the mounting of cables and/or plugs, e) that thereafter there is pulled another row of cables which are put into position in respective rececces in the second uninterrupted plate and/or there are put into position one or more plugs in respective rececces, f) that above the second row of cables and/or plugs there is placed another set of individual elements which are adapted to the individual rececces and the contents thereof, g) and that the prosess is possibly repeated until the frame is full, the frame at the top being terminated preferably by means of a whole plate which is adapted to the below arranged set of individual elements and the upper edge of the frame. Alternatively, the method might be executed by first of all putting in position most of the uninterrupted plates or the total number thereof, and by so doing there is established guidings for the cables which at a latest stage are to be pulled through the cable transit. It will then be possible to pull the cables in a substan- tiley independent sequence, which renders great flexi- bility and better adaption of the individual cables. It is accordingly possible to spread the pulling at several levels, and at the same time there is achieved an excell¬ ent guiding for the pulling of the individual cables independently of a given pulling sequence. Further features and advantages of the present invention will appear from the following description which is to be red in connection with the appended drawings. Fig. 1 comprising Fig. la - If, illustrate diagramaticly various embodiments of known cable transit elements which are included in a cable transit frame housing a known cable transit. Fig. 2 illustrates the elements of Fig. 1 mounted in a frame. Fig. 3 illustrates diagramaticly a cut out of a cable transit implemented in accordance with the teachings of the present invention. In Fig. la - le there are illustrated various embodiments of known cable transit elements which are included in a cable transit frame, as well as a clamping means If. The individual elements can be implemented in a manner as known per se, or as discussed in connection with Norwegian Patent Application 85.3167 conserning the provition of a gas tight and water tight transit. In Fig. 2 there are illustrated the various elements according to Fig. 1 mounted in a frame which is generally designated by 7. The first thing which is done in connection with the cable transit according to Fig. 2, is that a first grid s put into the frame, i.e. at both sides thereof. There¬ after, the cable transit elements illustrated in Fig. la and lb, are mounted into the frame, i.e. the elements A Arnβ S M»_ A/S 10000 0387 and Al, as well as the elements B and Bl. Thereafter, there are put into position further individual elements, i.e. the lower halves illustrated in Fig. lc, i.e. the elements C and Cl, possibly as one piece which is composed of the element C and the element Cl, as this is discussed in the above mentioned Patent Application. After this, a first row of cables are pulled and put into position in the elements C - Cl. Thereafter, the upper halves of the elements C - Cl are put into position above the cables, and then the side sections which are illu¬ strated in Fig. Id, namely the sections D and Dl and another row of lower halfs C - Cl, are put in position for the next cable row. Thereafter, cable row number two is put into position in the available row of cable transit elements C - Cl, and the upper halves of the cable elements are in position above the cables. This procedure is repeated until the complete frame is full, whereafter possible openings are closed by means of the massive profiles or the plugs illustrated in Fig. le. When all the cables have been pulled and the frame is completely closed, the grid walls on the one side is put under monderate preasure by means of screw connections in the outer flange of the frame. As appearing from the above discussed cable transit and the assembly thereof, the cable transit comprises a series of individual elements which require much pre¬ liminary work as regards their preparation and mutual adaption. Besides, such a great number of individual elements will involve many sealing surefaces which must be sealed during the final mounting of the transit, a fact which includes a larger risk for leakage in case the finished assembled transit is to be gas tight and water tight. Arnβ S Mark A/S 10000 03.87 In the new embodiment for a cable transit, as this app¬ ears from Fig. 3, there is provided an alteration between uninterrupted plates on which the cable is to "rest", and individual elements embracing either the plugs or the cables. Such a construction of cable transits including alternating plates and individual elements entail fewer components, a more stable construction, a simpler mount¬ ing, a simpler dismounting and fewer sealing surfaces and accordingly a more reliable transit as regards tightness in connection with gas and water. In the cable transit according to Fig. 3 which illu¬ strates a non-limiting embodiment of the transit acc¬ ording to the invention, the assembly thereof can be provided in several various manners. A first manner is to the fact that in the bottom of the frame 7a, there is mounted a first uninterrupted plate 8 having rececces 8a for the mounting of cables and/or plugs 10. Because there is used an uninterrupted plate 8, it is avoided to use all the individual elements which are discused above in connection with prior art technique according to Fig. 2. After a first row of cables 9 have been pulled through and brought into position in respective rececces 8a, or there have been put into position one or more plugs 10 in the individual rececces , there are above the first row of cables and/or plugs mounted a first set of individual elements 12 which are adapted to the individual rececces 8a in the bottom plate 8 and to the contents 9 and/or 10 in said rececces. Above the first set of individual elements 12 there is thereafter mounted a second uninterrupted plate 13 which Arnβ S M»rk A/S 10000 03.87 is adapted to the first set of individual elements 12, and which is provided with rececces 13a for the mounting of a second row of cables and/or plugs, here illustrated by means reference number 14 and 15, respectively. Above the second row of cables and/or plugs 14, 15 there are placed another set of individual elements 16 which are adapted to the idividual recesses 13a in the whole uninterrupted plate 13 arranged therebelow. Above this second set of idividual elements 16 there is thereafter mounted a third uninterrupted plate 17 which possibly can be provided with rececces 17a, or which at the top can be terminated with a plane surface which fits to the upper edge of the frame. Possibly, the above mentioned technique can be repeated with several alternations between idividual elements and uninterrupted plates, the finished transit at the top being terminated preferably with a whole plate adapted to a subarranged set of idividual elements and the upper edge of the frame. Another manner of putting togheter a cable transit resides in firstly putting in position most of or all of the uninterrupted plates 8, 13, 17, said plates at the endedges resting on each other and comprising a plurality of rececces 8a, 13a, 17a which define guidings for a later pulling of cables 9, 14. Such an assembly of the cable transit includes that the pulling of cables can be spread to several levels without being limited to any special sequence. After having pulled the cables in position and after possible plugs have been put in position in unoccupied rececces, the individual elements 12, 16 are finaly put in position. Ame S Merit A/S 10000 0387 In a later exchange of cables and/or plugs it is then only necessary to remove one or more individual elements 12, 16 for one or more cables or plugs which are to be exchanged, and this will in connection with the present cable transit include a relatively simple and time saving operation. It is be to understood that the idividual elements and the plates can comprise a small portion of resilient material which upon clamping of the plates and the ele¬ ments in the frame expand in the frame plane for sealing against cable and/or plugs and adjacent cable transit elements . This technique is especially favourable for achieving a gas tight and water tight cable transit based on a minimum number of transit elements included therein. Further, it is to be understood that the individual elements and the plates can comprise halves, which poss¬ ibly are put togheter individually in the frame, which can be of interest if a compleately gas tight or water tight transit is not required. Finally, it is to be understood that the expression indi¬ vidual elements covers elements which preferably are adapted to one cable transit or a plug transtit, but which also can be adapted to several cable transits or plug transits. As regards the plates these will prefer¬ ably extend from the one side of the frame to the other. Besides, the alteration between plates and individual elements can possibly be executed in arbitrary direction relative to the edges of the frame. In the present cable transit, and especially in the cases where the uninterrupted plates are put in positon for the pulling of cables, it will more easily be achieved a favourable cable guiding at an early stage of the pulling operation. By providing a predetermined positioning of Ame S Merit A. S 10000 0387 the individual cables in the transit, it is thus achieved an immediate correct cable geometry. Without the guiding provided for by the present cable transit, the cables will in the beginning take a slanted position relative to the cable transit, which in connection with a later lining up and final mounting of the cables can give to tense cables with unwanted stresses. Ame S. Merit A/S 10.000 03.87

Claims: P a t e n t c l a i m s 1. Transit, preferably for electric cables, comprising a plurality of cable transits which are included in a cable transit frame, and which are so shaped that they embrace a plurality of cables extending throught the cable transit, or plugs which define a temporary closure of cable openings , c h a r a c t e r i z e d i n that the cable transit elements comprise a combination of uninterrupted plates (8, 13, 17) having recesses (8a, 13a, 17a) for cable transition, as well as individual elements (12,16) adapted to the individual recesses in the plates (8, 13, 17). 2. Transit as stated in claim 1, characterized in that the uninterrupted plates (8, 13, 17) extend from the one side edge of the cable transit frame (7a) to the other side edge . 3. Transit as stated in claim 1 or 2, characterized m that the combination of uninterrupted plates (8, 13, 17) and the individual elements (12, 16) alternates in the upward direction of the frame, there being arranged a first uninterrupted plate (8) at the bottom of the frame, whereas above the first plate (8) there is arranged a first set of individual elements (12) which are adapted to the plate (8) below and togheter therewith defining transits (8a) for a first horisontal row of cables (9) and/or plugs (10) , and that above the first set of indi¬ vidual elements (12) there is arranged a second uninter¬ rupted plate (13) having on its top arranged a second set of individual elements (16) which define transits for a second horisontal row of cables (14) and/or plugs (15), etc. 4. Transit as stated in any of claims 1 - 3, character¬ ized in that the uninterrupted plates (8, 13, 17) as well as the individual elements (12, 16) comprise a narrow portion of resilient material, which upon clamping of the Ame S Merit A/S 10000 0387 plates and the elements in the frame expend in the frame plane for sealing against cable and/or plugs and adjacent cable transit elements. 5. Transit as stated in any of the claims 1 - 4, characterized in that the plates and the individual ele¬ ments comprise pairs of assembled part elements which at the one ende is provided with a narrow portion of resilient material. 6. Method for the assembly of a transit, preferalby a cable transit comprising a plurality of cable transit elements included in a cable transit frame, characterized in that the method comprises the following steps: a) that in the bottom of frame (7a) there is arranged a first uninterrupted plate (8) having recesses (8a) for the mounting of cables (9) and/or plugs (10), b) that a first row of cables (9) is thereafter pulled and put into position in respective recess (8a) in the plate (8) and/or there is put in position one or more plugs (10) in each recess (8a) , c) that above the first row of cables (9) and/or plugs (10) there is mounted a first set of individual elements (12) adapted to the respective recesses and the contents thereof, d) that above the first set of individual elements (12) there is mounted a second uninterrupted plate (13) which is adapted to a first set of individual elements (12), and which is provided with recesses (13a) for the mounting of cables and/or plugs, e) that thereafter there is pulled a second row of cables (14) which is put into position in respective recess (13a) in the plate (13) and/or there are put in position one or more plugs (15) in each recess (13a), f) that above the second row of cables (14) and/or plugs (15) there is mounted a second set of individual elements (16) adapted to the individual recesses (13a) and the contents thereof, g) and that the process is possibly repeated until the A e S. Merit A/S 10000 0387 frame is full, the frame at the top preferably being terminated by means of a hole plate adapted to a sub- arranged set of individual elements and the upper edge of the frame. 7. Method for the assembly of a transit, preferably a cable transit comprising a plurality of cable transit elements included in a cable transit frame, characterized in that the method comprises the following steps: a) that in the frame there are mounted a plurality of un¬ interrupted plates (8, 13, 17, respectively) having recesses (8a, 13a, 17a, respectively) for the mounting of cables (9, 14, respectively) and/or plugs (10, 15, respectively) in each recess, b) that cables (9, 14, respectively) are pulled or plugs (10, 15, respectively) are mounted in an arbitrary sequence at various hight or side positions in the transit, and c) that above the pulled cables (9, 14, respectively) and/or the mounted plugs (10, 15, respectively) there are mounted individual elements (12, 16, respectively) adap¬ ted to the respective recesses (13a, 17a, respectively). 8. Method as stated in claims 6 or 7, characterized in that there are used plates and individ¬ ual elements comprising a narrow portion of resilient material which upon clamping of the plates and the ele¬ ments in the frame expand in the frame plane for sealing against cables and/or plugs and adjacent cable transit elements . 9. Method as claimed in 8, characterized in that there are used plates and individ¬ ual elements comprising pairs of assembled part elements which at each one ende is provided with a narrow portion of a resilient material. Ame S Merit A/S 10000 03.87

Inventors: JACOBSEN CLAS TORE, JACOBSEN, CLAS, TORE
Applicants: NORSK KABELFABRIK AS
Application year: 1987
Main classification: H02G3
IPC codes: H02G3