FI95423B - Device and method for installation of a conductor, such as an electrical conductor - Google Patents

Description

, 95423

APPARATUS AND METHOD FOR INSTALLING A CABLE SUCH AS A POWER CORD

The invention relates to a device as defined in claim 1 as a traction sheave, for accelerating the tying and as a bracket for power lines, and to a method for installing a line as defined in claim 5. By means of the invention, the separate traction wheels of the lines are eliminated, as are the so-called manual tying with tools is eliminated.

In practice, the tying of the power line usually takes place in such a way that (assumed to be tied 400 kV steel pipe pole, 9 + 2 power and earth lines) professionals in the field, 3-4 wire installers, arrive at the pole site by car or track vehicle with accessories, depending on the terrain. The two lead fitters ascend to the pole along the ladder bolts, taking the haul rope with them. The Haali rope is a twine-length rope with a folding wheel that pulls the supplies up to the column.

1-2 wire fitters will be left down to handle the lifting of the supplies up to the pole. At the top of the pole perch, the two wire installers move along the ort to the insulator units hanging along the perch and climb along the insulators to the conductors, which in this case are three pieces. The wires are routed from one column to another through conductor wheels attached to the ends of the insulator units by means of a spacer. The cables are routed to the installation tension.

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The cable installers below lift the chain hoist with their aids up to the cable installers. Installers at the top install the pulley with aids between the perch and the wires. The pulley is tightened until the wires rise off the top of the guide wheel. The wheels are removed from the insulator spacer and lowered with a safety rope. The cable is tied in such a way that the installers below lift up the necessary accessories. A protective tape to prevent mechanical damage is wrapped around the wire and a U-shaped iron is dropped into the wire, which is fastened with a bolt and a double loop to the spacer at the end of the insulator. A U-shaped 2 95423 bolt is installed around the conductor through a hole passing through the U-shaped wrought iron. A wedge is installed between the conductor and the u-bolt and tightened with a u-bolt spacer and nuts. In this way, the wire is tied one by one, passing through the perch from one circuit to another. Finally, the ground ropes are tied at the very top. The raised tools are lowered and the installers descend from the column.

The main disadvantages of the current power line tying practice are the slowness / high cost of the work (eg eg 1 pole / day / 3-4 installers) and poor occupational safety when working from above. When raising the column leg and moving from the column leg to the perch and from the perch to the insulator unit, the seat belt cannot be used continuously engaged. In winter, places are very slippery. The occupational safety of downstream installers is also threatened in the form of possible falling objects. In addition, the point of attachment of the jumper is affected by the stresses caused by the vibrations of the conductor and the point load of the U-bolt and the wedge of the conductor attachment, which causes the wire strands to break. To remove these, the so-called a protective winding that protects the wire from mechanical stress at the attachment point and dampens wire vibration.

The device according to the invention provides a decisive improvement in the above-mentioned drawbacks. To achieve this, the device according to the invention is characterized by what is stated in the characterizing parts of the appended claims 1 to 4, and in particular in the characterizing part of claim 1. The method according to the invention is characterized in particular by what is set forth in the characterizing parts of claims 5 to 9 and in particular in the characterizing part of claim 5.

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The most important advantages of the invention are that this so-called the manual tying work step is completely eliminated and the time spent on the work is reduced to a fraction of the original, and the occupational safety risk is substantially improved because there is no need to climb the pole during this work step. The cable drive wheel is not needed separately, because the cable carrier and the drive wheel are combined in the invention.

3 95423

In the following embodiment, the invention will be explained in detail with reference to the accompanying drawing.

Figure 1 shows a device according to the invention, partly in section, in the initial position.

Figure 2 shows the device according to the invention seen from the end in the initial position.

Figure 3 shows the device according to the invention in a partially sectioned side view in the final position.

Figure 4 shows the device according to the invention seen from the end in the end position.

Figures 1 and 2 show the device according to the invention in the initial position tuned for wiring. Figures 3 and 4 show the device according to the invention in the final position when it has been fired from the ground by a trigger rope (1).

The device according to the invention is made of a steel plate which is bent into a u-shaped tie iron (2), which is shaped at its lower part into a semicircular shape (3) according to the cross-section of the wire.

The guide drive wheels (4) are fastened with steel plates (5) to the U-tie iron (2) by bolts (6) passing through the iron and to the guide drive wheel (4) by a shaft (4a) bearing two bearings (4b).

Inside the tray there are two locking tongues (7) to which the locking latches (8) are attached. The release bolt (9) is connected to the release mechanism (11) by a rod (10). The trigger mechanism consists of a part of a tooth (12) and a gear (13) on the arc of a circle and a mechanism (14) into which the trigger rope (1) is rotated a few turns.

The use and operation of the device according to the invention in its entirety is as follows: 4 95423

The device according to the invention is tuned to the standby position (Fig. 1) before installation in the insulator unit. The device according to the invention is in the tuning state when the locking tongues (7) are in the upper position and the guide drive wheels (4) are at the ends of the U-tie iron (2). A tripping rope (1) is installed in the tripping mechanism, and an auxiliary cord is pulled over the guide wheels (4) before lifting the insulator or column.

In connection with the wire drawing, the auxiliary rope pulls the actual wire-pull rope over the guide wheels (4), thereby pulling the actual conductor (k) over the guide wheels (4). When the cable is tightened to the mounting tension, the device according to the invention is triggered by pulling the release rope (1) until the gear wheel (13) has rotated along the gear (12) to the lower position, whereby the rod (10) turns the release bolt to the lower position. (7) turn down over the wire (k). At the same time, the traction wheels of the wire fall down (Fig. 3), whereby the wire falls into the bottom groove (3) of the U-bonding iron (2). The cable is locked to the cable by means of locking tabs (7) and locking latches (8), preventing the cable from sliding parallel to the cable.

In a later step, the intermediate ties are laid on the intermediate tie trolley, whereby the guide wheels (4,5) and the release mechanism (10, 11, 12, 13, 14) are removed by removing the bolts (6) from the U-tie iron (2). Check that the locking latches (8) are in place.

In particular, it should be noted that the device according to the invention is. . . intended as a traction sheave and support holder for straight line and small angle wires.

The device according to the invention can be used with small changes at large conductor angles, whereby one wheel is added to the center and the position of the end wheels is changed, without, however, substantially changing the original operation of the device according to the invention.

Claims (9)

5 95423 Apparatus for installing a wire (K), such as an electric wire or the like, comprising a tie iron (2) suitably provided with a wire receiving groove (3) and means for locking the wire, characterized in that the means for locking the wire comprise at least one a locking tab (7) adapted to be movable, preferably pivotable towards the line, the locking tab having at least two operating positions such that in the first operating position the cable (K) is movable relative to the tie iron (2) and the locking tab is shaped and constructed in a second function in the position to tighten against the wire (K) by pulling the wire through the tie iron (2) to press the wire with the locking tab (7) towards the groove (3) of the tie iron (2) and prevent the wire (K) from moving relative to the groove (3) of the tie iron (2), and further comprises an opening mechanism (li) for retaining the locking tab (7) first acetic said operating position and for triggering the second operating position, and latch means (8) of the locking tongue (7) for locking the cable (K) binding to the operating position. Device according to Claim 1, characterized in that the release mechanism (11) of the locking means of the cable (K) is adapted to be operated remotely. Device according to claim 2, characterized in that said remote control is adapted to be implemented. by means of a release rope (1) connected to the release mechanism (11). Device according to one of Claims 1 to 3, characterized in that the device further comprises at least one guide pulley (4) which is mounted on the tie iron (2) by means of support means (5) and which is adapted to support the cable, which is preferably adapted to be detachable. wrought iron. A method of installing a conduit (K), the method comprising the steps of placing a tie rod means (2) on a conductor column, tightening the lead to a predetermined tension supported by at least one lead traction means (4) connected to the tie rod means, characterized in that it further comprises interlocking preferably releasing the locking tabs (7) from the non-wire-free free position to the wire-binding operating position, where the movable locking means tighten against the wire by the pulling of the wire and thus bind the wire to the wire receiving groove (3). A method according to claim 5, characterized in that it comprises the remote release of the locking means from the free position to the wire-binding operating position. A method according to claim 5, characterized in that it further comprises retaining the locking tab (7) included in the locking means and remotely releasing it by means of suitable triggering means (11) arranged in the tying iron means (2). Method according to Claim 7, characterized in that the triggering takes place by means of a string means (1) or the like. through. Method according to any one of claims 5 to 8, characterized in that it further comprises the step of removing said at least one traction sheave means (4) from the connection of the wrought iron means after the tying step has been completed. n 95423