FI95423C - Device and method of installing a conduit, such as an electrical conduit - 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.

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 guide wheel. The wheels are removed from the spacer 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 work 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 triggered 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 as a whole is as follows:

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)

An apparatus for installing a line (K) such as an electrical line or the like, comprising a connecting iron (2) suitably provided with a latch (3) receiving the line and means for reading the line, characterized in the means for reading the conduit comprises at least one read-on lug (7) which is arranged to be movable against the conduit, advantageously being pivotable to the conduit, which read-notch has at least two functional positions on it, that the conduit (K) in a first operating position can be moved in relation to the binding iron (2) and the reading lug to its shape and structure is arranged so that in a second operating position it is clamped against the wire (K) as the wire is pulled through the binding iron (2) so that with the reading lug (7) pressing the conduit against the barrier (3) of the binding iron (2) and preventing the conduit (K) from moving in relation to the barrier (3) of the binding iron (2), and The apparatus further comprises a release mechanism (11) for retaining the reading bell (7) in the first operating position and for triggering the said second operating position, and blocking means (8) for reading the reading bell (7) in a operating position which binds the conduit (K). . Device according to claim 1, characterized in that the triggering mechanism (11) for the reading means of the line (K) is arranged for remote use. Device according to claim 2, characterized in that said remote control is arranged so that it is carried out by means of a release line (1) which is connected to the triggering mechanism (11). Device according to any one of claims 1 to 3, characterized in that the device further comprises at least one guiding pull wheel which, by means of support means (5), is pivotally mounted on the bonding iron (2) and which is arranged to movably carry the line, which wheels are advantageously arranged to be detachable from the bonding iron. A method of installing a conduit (K), comprising the steps of placing a bonding iron means (2) in a conduit post, tensioning the conduit supported by at least one conduit traction means (to a predetermined voltage) 4) arranged in conjunction with the binding iron means, characterized in that it further comprises the steps of triggering movable reading means, which are advantageously read bells (7), from a free position where they do not bind the lead to a lead binding mode, in which position the The movable reading means are tensioned against the conduit by the conduction pull of the conduit and in this way the conduit in the binding iron means s (2) latches (3) which receives the conduit. Method according to claim 5, characterized in that it comprises remotely controlled tripping of the reading means from the free position to the functional position where the line is bound. Method according to claim 5, characterized in that it further comprises retaining and remotely controlled release of a reading bell (7) included in the reading means, by means of suitable release means (11) arranged in the binding iron means (2). Method according to claim 7, characterized in that the release is effected by means of a lacing means (1) or the like. Method according to any one of claims 5 to 8, characterized in that it further comprises the step of removing said at least one guide pull wheel means (4) from contact with the binding iron means after the binding step has been performed. ϋ