Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
  • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
  • H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G7/00—Overhead installations of electric lines or cables
  • H02G7/05—Suspension arrangements or devices for electric cables or lines

Definitions

• the present invention concerns a device for combined deployment, securing and deloading of airborne li ⁇ nes/wires, especially lines/cables leading electrical current.
• the device according to the present invention infra called “clamp”, is however not limited to such lines/cables but may also be used comprehensively for lines where a combined deployment/securing function is wanted in the clamp, e.g. when mounting/deploying cables for ski-lifts, fence wires, cables for masts etc.
• Fig. 1 shows a securing device according to conventional prior art
• Fig. 2 shows a deployment device according to con ⁇ ventional prior art
• Fig. 3 shows a combined deployment/tightening/deloading device according to the present invention
• Fig. 4 shows a cross-section of the device according to the invention in a cut parallel to the rotational axis
• Fig. 5 shows a cross-section perpendicularly to the rotational axis
• Fig. 6 shows a cross-section of an alternate embodiment of the device according to the invention
• Fig. 7 shows a second cross-section of the alternative embodiment shown in fig. 6,
• Fig. 8 shows a cross-section of a third embodiment of the device according to the invention wherein the device is used for deployment of a cable
• Fig. 9 shows in cross-section a third embodiment of the device according to the invention being suited for a de- loading fastening for a line with an uni-directional movement/wedging of the line
• Figs. 10 and 11 show a wedging device which may be used to prevent the guiding wheel in the device from rotating after the line/wire/cable has been mounted in its gui ⁇ dance track, and
• Fig. 12 shows a securing device for the line/wire/ca ⁇ ble/rope when the device according to the invention is used as a deloading device for the line/wire/cable/rope.
• Fig. 13 shows an embodiment of the device according to the invention with a multiple choice possibility for positioning the device on top of a pole.
• a con ⁇ ventional clamp type e.g. as shown in fig. 1 wherein a line (not shown) , after having been drawn between a num- ber of poles, is placed i a stationary clamping device.
• the clamping device comprises an isolation fork 1 which at its one end is secured to the pole (not shown) and is in its other end widened to two legs 2,3 between which legs 2,3 the clamp 4 for the line/cable is mounted.
• the mounting of the clamp 4 is conventionally performed by bolting the clamp 4 to the legs 2,3 by using a bolt 5.
• a groove wherein the line/cable rests after succ ⁇ essful deployment .
• the clamp 4 is equipped with an over-clamp 7 which is secured to the clamp 4 by using bolts and/or nuts 8.
• a deployment tool as shown in fig. 2 is to avoid the line/cable being chafed and possibly breaking as a consequence of wear at the deployment over the line/cable clamp as shown in fig. 1.
• the pressure against the edges of the cable clamp during deployment of the line/cable may at times become relatively large, and accordingly a tool is required which may be placed over the groove in the clamp and which has rollers over which the line/cable may be guided to avoid excessive strain.
• the deployment tool being shown in fig. 2 is a jointed box 20 wherein the end parts 21,22 of the box may pivot about the middle section 23 of the box via pivoting/se ⁇ curing bolts 24.
• Each of the end parts 21,22 of the box 20 is also equipped with rollers 25 which may be rotated to give access to the internal parts of the box, and the rollers 25 may be secured with locking devices, e.g. plinths 26 so that a line/cable may be placed inside the box by using the rollers 25 after it having been led into the box by removing the rollers 25 and subsequent re ⁇ mounting and locking them when the line has been placed in the box 20.
• locking devices e.g. plinths 26
• the device may be mounted by using a tightening device 27 which hooks the end parts 21,22 of the box to the middle part 23 of the box 20 by using a handle 28.
• the entire deployment tool according to the prior art may be secured to the top clamp 4 via the bolt holes 9 by using winged bolts 29 (see fig. 1) .
• the device according to the invention may, as shown, be placed on an isolator fork 1 on the top of a pole (not shown) .
• the device according to the invention comprises a wheel 30 which may rotate about an axis 31 running through the isolator fork 1 and the wheel 30.
• the wheel 30 is equipped with at least one groove 32 about its own circum erence and which is suited for leading a line/cable.
• a securable clamp 33 for se ⁇ curing the line/cable in the groove 32 on the wheel 30.
• the clamp 33 may be equipped with a similar groove 34 on its one side, and with an extension 35 on its other side.
• the clamp 33 By placing the clamp with the groove 34 turned towards the running groove 32 in the wheel 30, there will between the clamp 33 and the wheel 30 be created an opening through which the line/cable may run.
• the wheel 30 When feeding out the line/cable the wheel 30 will rotate about the axis 31 and provide a minimal resistance against the deployment of the line/cable.
• the clamp 33 may simply be turned so that the extension/knob 35 now faces the groove 32.
• the cable will now be securely locked inside the groove 32 of the wheel 30. This is also shown in fig. 7.
• the groove 32 not necessarily is the only groove existing in the wheel 30, or there may alterna ⁇ tively be placed a number of wheels in the fork 1.
• One way to design the device according to the invention to avoid the above mentioned problem with liquidization of the cable metal in the securing area between the wheel 30 and the clamp 33, is to equip the wheel with pene ⁇ trating grooves 40,41 wherein the line/cable may rest. If such an alternative is used, the wheel 30 may be par- titioned into a number of sections 37,38,39.
• grooves 40,41 may have a diameter being designed for the diameter of the relevant cable, so that the grooves/holes 40,41 may have different sizes. This is also shown in fig. 6.
• the wheel 30 When securing a cable with such a partitional running wheel 30, the wheel 30 may at the tightening be complete, i.e. it is not split up, and the line/cable/wire may run in the peripherical groove 32 when rotating the wheel 30 about the rotational axis 31.
• the lead- ing wheel 30 may be split at alternative weakening lines 43,44 or be split in any other manner, to expose the grooves 40,41.
• the line/cable wire may be placed inside this groove and the clamp 33 may then be tightened with its knob 35 facing the li ⁇ ne/wire/cable. In this way there will be created a sig ⁇ nificantly larger securing area between the line/ca ⁇ ble/wire and the clamp 33, and the above mentioned pro- blem with liquidization of the cable metal will thus be avoided.
• the temporarily removed part 37 of the running wheel 30 is again secured in its original posi- tion on the wheel so that the cable/line/wire/rope is running through its respective designed hole 40,41 and the clamp 33 may be tightened onto the wheel part 37 which then locks the line/cable/wire/rope in the groove 40 (or 41) .
• the penetrating grooves 40,41 in the wheel 30 may also be given the cross-sectional form of a half-moon since it alternatively only is the lower part of the groove which is used as a socket for the line/wi- re/cable, but on account of its simplicity in the produc ⁇ tion as well as for performing the securing operation in the preferred embodiment where the line runs through the holes 40,41, it is preferred that the grooves 40,41 are designed as penetrating circular holes .
• the number of penetrating holes 40,41 in the wheel 30 may also vary and it is not limited to two. Preferably the number of penetrating holes, if they are present, will be between 1 and 8, even if a random number of holes will be possible.
• the wheel 30 may be equipped with lines of weakness 43,44 easing the splitting of the wheel 30.
• the lines of weak- ness 43,44 will run mainly along the diameter of the penetrating holes 41,42.
• the wheel 30 may be partitioned with clamps or other securing devices (not shown) along its sides for keeping the wheel 30 together during the mounting of the line/cable/wire/rope.
• the clamp 33 may also comprise two separate parts whereof one part, shown in figs. 6 and 7, is used when drawing the line/cable.
• the clamp with only one groove, which also may be termed the tool part, is screwed to the fork part 1 so that there is created a penetrating hole between the tool part and the groove 32 of the wheel 30.
• the groove in the clamp part will align the line/cable so that it runs in the groove 32 of the wheel 30.
• the clamp part may in this embodiment be exchanged with another clamping part as shown in figs 6 and 7, or it may be turned and used as a clamp part directly if it is designed as shown in the embodiment according to figs. 3 and 4.
• the wheel 30 is split by the weakness lines described supra in such a way that the line/cable 43 thus may be led in one of the grooves 40,41.
• a tool comprising a bevelled surface 45, preferably with a groove wherein the line/cable 42 may run, the following function may be achieved:
• the bevelled surface/groove 45 is located in such a way that the line of weakness 44 runs mainly parallel to the bevelled surface 45. Thereby the line/cable 42 may slide freely (the wheel being mainly locked, but with a little possibility for tilting about the axis 31) in the groove being created between the removed part at the line of weakness 44 and the groove in the bevelled surface 45. By drawing the line/cable in the direction of the arrow, the cable 42 may slide unprevented in one direction.
• the line/cable 42 may be locked and prevented from movement in the opposite direction (contrary to the arrow) since the wheel 30 then will tilt about the axis 31 and wedge the line/cable 42 in the groove in the be- veiled surface 45.
• the line may be mounted without using special tools such as jacks etc., and the wheel 30 may furthermore be used for securing the line 42 to the wheel 30 in the fork 1 as disclosed supra.
• the groove in the running wheel 30 and/or in the bevelled surface 45 may be adjusted to fit the diameter of the line 42 running in the groove.
• the device according to the invention should, when it is used as a mounting/clamping part, be able to withstand loads of at least 500 kg uni-lateral pull on the cable 42, even if this is not critical or any significant number concerning the device according to the invention.
• the device according to the invention is used as a deloading securing point, such a point should be able to withstand a load of at least 4,5 tons, even if this is not any critical load value, and other values may equally well be used without departing from the idea behind the present device.
• the device should at any time and for any form of line/cable/wire/rope be able to with ⁇ stand a load being at least 90% of the breaking strength of the relevant line/cable/wire/rope which is being moun- ted.
• the device according to the invention may be equipped with a wedging device which may be placed between the fork part 1 and the running wheel 30 and/or between the clamping part 33 and the running wheel 30.
• a wedging device which may be placed between the fork part 1 and the running wheel 30 and/or between the clamping part 33 and the running wheel 30.
• the shown wedge device comprises in this embodiment two halves 51,52 which may be wedged between the clamp part 33 and the wheel 30 and/or between the fork 1 and the wheel 30.
• these may be equipped with reciprocating securing parts.
• An example of such a securing part is shown in fig. 11, wherein the securing part is shown as a bolt 53, even if other de- vices such as securing strips, clamps, screws etc. also may be used.
• the wedge may be made of one piece of material and be squeezed between the wheel 30 and the clamp 33 when mounting the clamp via the bolts 36.
• the wedge may also be given a form so that it fits the curvature of the running wheel 30 to give a larger securing area between the wedge and the running wheel.
• FIG. 12 it is shown an alternative embodiment of a splittable deloading wedge for deloading the line/ca ⁇ ble/wire/rope by mounting this between the extreme poles in the area where the line/cable is mounted.
• This wedg ⁇ ing device is partitioned into two halves 61,62 with a groove between them wherein the line/wire/cable/rope 42 may run.
• this may be wedged securely in the groove between the two halves 61,62 and optionally between the groove 32 in the running wheel 30 and one of the halves 61,62 for thus forming a S-shaped passage in the groove between the halves.
• This will, when joining the two halves 61,62, e.g. by using a clamp 63, vegde the line/wire/cable 42 securely so that it cannot slip in the groove.
• the device according to the invention has been disclosed in connection with such an embodiment wherein there is shown one wheel running between the two legs 2,3 of the isolator fork 1, but it is obvious that several adjacent running wheels also may be used without departing from the idea behind the invention.
• the fork of the isolator may be equipped with suit ⁇ able threaded holes 70,71,72 making it possible to mount the isolator fork 1 at different angles to the longitudi ⁇ nal axis of the pole onto which the fork is mounted.
• Examples of possible angles will be 90°, 45°, and 60° relatively to the longitudinal axis of the pole, although any angle will be possible depending on the angle of the mounting holes 70,71,72.
• An embodiment of such a mul ⁇ tiple choice for the isolator fork device 1 is depicted in fig. 13.

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• Electric Cable Installation (AREA)
• Clamps And Clips (AREA)
• Pulleys (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19899157

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (1)

Citations (7)

• 1996
  • 1996-03-14 NO NO961043A patent/NO301679B1/no not_active IP Right Cessation
• 1997
  • 1997-02-20 AU AU25227/97A patent/AU2522797A/en not_active Abandoned
  • 1997-02-20 WO PCT/NO1997/000055 patent/WO1997034350A1/en active Application Filing
• 1998
  • 1998-09-09 FI FI981933A patent/FI981933A/fi not_active IP Right Cessation
  • 1998-09-10 SE SE9803071A patent/SE510580C2/sv not_active IP Right Cessation

Patent Citations (7)

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