FR2809530A1 - DEVICE FOR PASSING A CABLE - Google Patents

Abstract

A device for passing a cable protected by a sheath, towards the inside of a transformer tank (30), comprises a tubular body (4) adapted to the passage of the sheath, the internal surface (4a) of the tubular body (4) comprising locking means (5, 6) of the sheath (2) in the tubular body (4). Use in particular for mounting cables in a transformer tank supplying an illuminated sign.

Description

"Cable passage device" The present invention relates to a

  device for passing a cable, in particular to allow the connection of cables in a tank

Electric transformer.

  The present invention relates in particular to the field of electrical transformers used for the connection of signs.

  bright, especially outside.

  Such electrical transformers generally have both high voltage cables and low voltage cables which are connected inside the transformer and make it possible to supply the signboards with electric current.

bright.

  The high and low voltage electrical cables, intended for use outside, are protected by a sheath which provides good protection

  mechanical cables and guarantees watertightness.

  The object of the present invention is to propose a device for passing cables providing simple and watertight mounting thereof through a tank.

of an electric transformer.

  According to the invention, the device for passing a cable protected by a sheath comprises a tubular body suitable for the passage of the sheath, an internal surface of the tubular body comprising means for blocking the

sheath in the tubular body.

  Thanks to the locking means in the tubular body of the

  cable passage, the sheath is held in position after assembly.

  According to a preferred characteristic of the invention, the blocking means comprise projecting elements adapted to block the sheath in the body

tubular.

  Thus, the sheath can be blocked by simple cooperation of the

  elements projecting from the outer surface of the sheath.

  In a particularly advantageous manner, these blocking means comprise a series of projecting teeth arranged in a transverse plane of the

tubular body.

  The arrangement of a series of teeth on the same crown of the tubular body is particularly advantageous for obtaining the cooperation of these

  teeth with a circular groove in the sheath.

  This arrangement is particularly suitable for corrugated ducts.

  According to another preferred characteristic of the invention, the locking means comprise at least two series of projecting teeth, of different heights. These two or more sets of teeth allow you to adapt to different

sheath diameters.

  According to another preferred characteristic of the invention, the tubular body is inclined downward in the direction of the outlet of the cables from the transformer tank. This arrangement towards the bottom facilitates the flow of water which could be introduced inside the device for passing a cable, in particular

in case of rain.

  Preferably, the tubular body includes a slot.

  This slot also facilitates the evacuation of water, and

  especially water from condensation on the sheath surrounding the cable.

  According to another preferred characteristic of the invention, the tubular body is integral with a mounting plate adapted to be mounted so

  removable on the tank of a transformer.

  The cable passage device can thus be mounted or removed from

tank.

  This characteristic makes it possible in particular to mount the cable and the sheath inside the device for passing a cable before mounting it on the tank. Conversely, the cable passage device can be dismantled, without removing the cable and the sheath blocked in the passage device, in the event of

  intervention on the transformer.

  According to a particularly advantageous characteristic, the mounting plate is fixed to a second plate, a peripheral groove being formed between the two plates, the peripheral groove being adapted to fit onto the

  edges of a notch in the transformer tank.

  The mounting of the passage device is thus easily carried out by

  nesting on a side of the transformer tank.

  Preferably, a plate of flexible material is inserted between the plate

mounting plate and the second plate.

  This plate made of flexible material makes it possible to guarantee sealing at the level of the mounting of the device for passing a cable according to the invention on

transformer tank.

  Other features and advantages of the invention will become apparent

in the description below.

  In the accompanying drawings, given by way of nonlimiting examples: - Figure 1 is a front view of the cable passage device according to the invention; - Figure 2 is a top view of the cable passage device of Figure 1, in which a cable is mounted; - Figure 3 is a cross-sectional view along line III-III in Figure 1, of the cable passage device before mounting on the tank of a transformer; - Figure 4 is a cross-sectional view of the device of a cable along the line IV-IV of Figure 1; and - Figure 5 is an enlarged view of detail A of Figure 3, illustrating a

  mounting portion of the device on the tank of a transformer.

  We will describe, firstly with reference to Figures 1 and 2, a cable passage device which allows to mount this cable inside a transformer tank. It may in particular be a transformer tank used to supply high-voltage current to a luminescent tube intended to equip a

neon sign.

  This type of transformer is generally used outdoors and it is necessary that the passage of cables through the tank of the transformer

  is made in a perfectly waterproof manner.

  These cables themselves, connected to the primary or secondary circuit of the transformer can be protected at the outlet of the transformer tank by

a sheath.

  Such a type of cable is illustrated for example in FIG. 2. In this example, and in no way limiting, the cable 1 is protected by a sheath

2 of corrugated structure.

  The passage device 3 comprises a tubular body 4 which allows the passage of the sheath 2 of the cable. In this example, the passage device comprises two identical tubular bodies 4, arranged parallel to one another in order to allow the

  parallel mounting of two cables in the transformer.

  These two tubular bodies 4 are integral with a mounting plate which makes it possible to fix the passage device 3 on a transformer tank

  as will be explained later in the description.

  As best illustrated in Figures 3 and 4, the tubular body 4 has on an internal surface 4a locking means 5, 6 which allow to maintain

  the sheath 2 in place in the tubular body.

  Here, the locking means 5, 6 form projecting elements on the internal surface 4a of the tubular body 4. We thus observe in FIG. 3, two series of teeth 5, 6 each arranged in a transverse plane of the tubular body. These two sets of teeth 5, 6 have different heights for their

  allow adaptation to different sheath diameters 2 surrounding the cables 1.

  It can be seen in FIG. 3 that the tubular body 4 has a first end 7, integral with a mounting plate 10 and intended to open out inside a transformer tank, and a second end 8 opening out at

  opposite to the outside of this tank.

  The assembly thus formed of the two tubular bodies 4 and of the mounting plate 10 can be made of a hard plastic material, molded in one

single piece.

  A first series of teeth 5, of small height, is disposed near the second end 8 of the tubular body 4 while a second series of teeth 6, of greater height, is disposed near the first

end 7 of the tubular body 4.

  The teeth of each of the two series 5, 6 are arranged in a

  crown of the internal surface 4a of the tubular body 4.

  These teeth thus consist of a projecting rib extending over

  a portion of an arc of a circle of the internal surface 4a of the tubular body 4.

  Preferably, each series of teeth 5, 6 has three teeth distributed

  regularly on the internal surface 4a of the tubular body 4.

  In addition, the first series of teeth 5 is preferably arranged in

  staggered with the second set of teeth 6.

  Furthermore, the internal surface 4a of the tubular body 4 comprises, from the second series of teeth 6 and in the direction of its first end 7, portions in excess thickness 9 extending between each tooth of the second series 6 and

  the first end 7 of the tubular body 4.

  On the other hand, the tubular body 4 has an inclined central axis X and not

  perpendicular to the plane formed by the mounting plate 10.

  The tubular body 4 is thus truncated transversely by the mounting plate 10 forming an inclined plane with respect to the central axis X. This tubular body 4 finally comprises a slot 11, disposed in a portion of the tubular body located in the lower part when the passage device

  a cable 3 is mounted on the tank of a transformer.

  The first end 7 of the tubular body 4, adapted to open into the transformer tank, is closed by a sealing part 12 or cover

  formed from a flexible deformable plastic.

  This sealing part 12 comprises a tubular part 13 intended to come into extension of the tubular body 4, along the central axis X. This sealing part 12 is truncated transversely by a plane inclined relative to this central axis X so to connect to the body

  tubular 4 also inclined relative to the mounting plate 10.

  As well illustrated in Figures 1 and 2, the tubular part 13 has a closed end 14 adapted to open into the tank, only an opening 15 being provided substantially in the center of this closed end 14 of the part

sealing 12.

  This opening 15 is adapted to the passage of the cable 1 as illustrated in the

figure 2.

  Preferably, this opening 15 is bordered, at its periphery, by a flexible annular lip 16 which comes into contact with the cable 1 emerging from the

passage device 3.

  As illustrated in FIG. 4, when only one of the tubular bodies 4 is used for the passage of a cable 1, the other tubular body 4 comprises a part

  seal 12 whose opening 15 is closed by a stud 17.

  This stud 17 protrudes towards the inside of the transformer tank.

  The sealing piece 12 comprises, in addition to the tubular portion 13 and the closed end 14, a plate made of flexible material 18 secured to the portion

  tubular 13 of the sealing part 12.

  All of this sealing part 12 can be produced by molding

  in one piece in flexible plastic.

  This flexible material plate 18 has dimensions substantially

  identical to mounting plate 10.

  This flexible material plate 18 is inserted between the mounting plate

and a second plate 19.

  The mounting plate 10 and the second plate 19 are thus fixed to each other so as to keep pinched between them the plate of flexible material 18 and thus ensure the mounting of the sealing element 12 in the extension

  of the tubular body 4 of the passage device 3.

  In this exemplary embodiment, and in a nonlimiting manner, the fixing of the second plate 19 on the mounting plate 10 is carried out, first of all by means of hooks 20 integral with the second plate 19 and adapted to come to fit together in notches of complementary shape made in the

mounting plate 10.

  On the other hand, lugs 21 integral with the second plate 19 are adapted to be clipped into corresponding openings of the plate

mounting 10.

  To this end, the flexible material plate 18 comprises openings 22

  allowing respectively the passage of the lugs 21.

  This plate 18 is thus compressed in sandwich between the plate

mounting 10 and the second plate 19.

  A peripheral groove 23 is formed between the mounting plate 10 and the second plate 19. This peripheral groove 23, as well illustrated in the figure

  1, here extends on three sides of the passage device 3.

  As illustrated in FIG. 5, in order to produce this groove, the second plate 19 comprises a peripheral shoulder 24, adapted to come opposite

  the mounting plate 10 and the flexible material plate 18.

  On the lower side of the passage device 3, that is to say intended to be disposed downwards when the passage device is mounted on the transformer tank, the lower edges of the plate of flexible material 18a and of the second plate 19a are bevelled towards the inside of the groove 23, so that

  that it has a flared shape towards the outside of the passage device 3.

  We will now describe the mounting of this passage device on a

  transformer tank and mounting cables inside this device.

  As well illustrated in FIG. 3, the tank of a transformer 30 comprises a notch 31, here of rectangular shape with dimensions substantially smaller than the dimensions of the mounting plate 10 of the

cable passage device.

  Thanks to the peripheral groove 23, the passage device 3 can

  fit on the edges of the notch 31 of the transformer tank 30.

  The installation of the passage device 3 on this notch 31 is facilitated in particular by the flaring of the groove 23 located in the part

  passage 3.

  Preferably, before the actual mounting of the device on the transformer tank 30, it is possible to carry out the wiring, that is to say the mounting of the

  cables in the passage device 3 according to the invention.

  In practice, the cable 1, as illustrated in FIG. 2, is inserted through the

  tubular body 4 and the opening 15 formed in the sealing element 12.

  The cable 1 thus emerges from the passage device 3 from this opening 15, the sealing at this level being perfectly achieved thanks to the lip

  seal 16 conforming to the external surface of the cable 1.

  The protective sheath 2 of the cable 1 is also introduced inside the tubular body and locked inside of it, by force, thanks to the teeth 5, 6 which come to cooperate here with a groove in the corrugated structure the

sheath 2.

  In the case of a large sheath, the first series of teeth of low height is inserted inside a groove in the sheath 2. If the sheath 2 has a smaller diameter, the other set of teeth 6, high

  upper, then cooperates with a groove in the sheath 2.

  The sheath 2 is thus blocked in the passage device, the latter

  can be easily handled once the cables are pre-assembled inside.

  When the passage device is mounted as described above on the transformer tank 30, the plate made of flexible material 18, in contact with the edge of the notch 31 of the tank forms a perfect seal for the

  mounting the passage device on this tank of the transformer 30.

  Finally, the inclined arrangement of the tubular body 4 facilitates the flow of water, and in particular the condensed water present on and

in the sheath 2.

  The outlet of the water from the tubular body 4 is further facilitated by the presence of the slot 11 located in the lower part of the tubular body 4 a

  times the passage device mounted on the transformer tank 30.

  A passage device is thus obtained allowing the cables to be mounted in a perfectly sealed manner and providing great freedom of wiring. In particular, the wiring can be carried out either before or after

  mounting of the passage device on the transformer tank 30.

  Of course, many changes could be made to

  The exemplary embodiment described above.

  In particular, the two tubular bodies 4 could be used for the

  mounting of two cables in parallel.

  In this case, the stud 17 sealing the sealing element 12 can be cut, for example using a cutting pliers, to allow passage

and mounting a cable 1.

  In addition, a stud 17 could exist on all the sealing elements 12 and be cut according to the needs of mounting the cables in the transformer. In addition, the cable passage device could comprise a single tubular body 4 associated with a mounting plate 10, the transformer tank comprising as many notches 31 as necessary to

  allow cable mounting thanks to these unitary passage devices.

Claims (9)

  1- Device for passing a cable (1) protected by a sheath (2), towards the inside of a transformer tank (30), characterized in that it comprises a tubular body (4) suitable for passage of the sheath (2), an internal surface (4a) of the tubular body (4) comprising locking means (5, 6) of the sheath (2) in the tubular body (4). 2- A device for passing a cable according to claim 1, characterized in that the locking means (5, 6) comprise elements in   projection adapted to block the sheath (2) in the tubular body (4).   3- A device for passing a cable according to one of claims 1   or 2, characterized in that the locking means comprise a series of   projecting teeth (5, 6) arranged in a transverse plane of the tubular body (4).   4- A cable passage device according to claim 3, characterized in that it comprises at least two series of projecting teeth, different heights.   5- A device for passing a cable according to one of claims 1   to 4, characterized in that the tubular body is inclined downward in the direction   from the output of the cables from the transformer tank.   6- A device for passing a cable according to one of claims 1   to 5, characterized in that the tubular body (4) comprises a slot (11).   7- A device for passing a cable according to one of claims 1   6, characterized in that the tubular body (4) is integral with a mounting plate (10) adapted to be removably mounted on the tank of a transformer (30).   8- A device for passing a cable according to claim 7, characterized in that the mounting plate (10) is fixed to a second plate (19), a peripheral groove (23) being formed between the two plates (10 , 19), the peripheral groove (23) being adapted to fit onto the edges of a   notch (31) of the transformer tank (30).   9- A device for passing a cable according to one of claims 1   8, characterized in that one end (7) of the tubular body (4), adapted to open into the transformer tank (30), is closed by a sealing part (12) comprising an opening (15) for the passage of the cable (1), said opening (15) comprising at its periphery a flexible annular lip (16)   adapted to come into contact with the cable (1).   - Device for passing a cable in accordance with claims 8 and 9,   characterized in that the sealing piece (12) comprises a plate of flexible material (18) inserted between the mounting plate (10) and the second plate (19).   11- A device for passing a cable according to one of claims   1 to 10, characterized in that it comprises two identical tubular bodies (4) arranged in parallel.