JPS6022406A - Method of installing wire and hanging warehouse for installing same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) This invention is a transmission line (C transmission line) for transporting and supplying electric power.
This invention relates to a method for constructing a steel tower between steel towers and a hanging wheel used to carry out this construction method, and is primarily used in the field of power transportation equipment industry.

(Conventional related technology and its problems) In order to newly install electric wires between each steel tower, it is usually necessary to carry out wire extension and wire tensioning work. That is, as shown in Fig. 1, overhead wire wheels 2, . It is necessary to carry out a wire stretching operation in which the towing rope is wound up using an en-sink inch 5, and a wire tensioning operation in which the stretched electric wire is stretched to a predetermined tension. In addition, in order to avoid the harmful effects of Fi, the traction rope 3 and the electric wire 4 coming into contact with the obstruction 6 below during the wire extension work, it is necessary to maintain a required distance 7 between the electric wire 4, etc. and the obstruction 6. There is. For this reason,
The electric wire 4' pulled out from the electric wire drum 8 is temporarily transferred to the wire rolling car 9.
At the same time, the wire stretching work is performed while controlling the tension of the electric wire 4 by operating the rotational brake of the wire rolling car. That is, in order to maintain the above-mentioned separation 7, it is necessary to increase the tension T of the electric wire 4, etc. and reduce its slackness d. At this time, W is the weight per unit length of the electric wire, and S is the span length. (distance between the steel towers 1), the above-mentioned sag d is expressed by the following formula.

However, if the above-mentioned wire drawing tension T is increased, the following problems will occur.

(1) Ensink inch 5, track extension car 9 and tow rope 3
Large and robust overhead line work tools are required.

(2) The return torque of the electric wire 4 increases, and therefore,
It is necessary to attach a capacitor 1o having a large resistance force to the connection portion between the electric wire 4 and the traction rope 3 to prevent the electric wire from twisting back.

(3) It becomes difficult for the connection part 11 between the ends of the electric wire 4 to pass through the metal wheel 2, and the connection part requires a special protector to prevent the connection part from bending and deforming.

(4) The contact pressure between the electric wire 4 and the metal wheel 2 increases, which adversely affects the electric wire. That is, as shown in FIGS. 2 and 3, the electric wire 4 is constructed by twisting strands of wire, and the directions of the twist are opposite to each other for each layer, and the electric wire 4 has a length of 40 units. The contact pressure P is expressed as, but when this contact pressure P increases, aluminum strands made of a relatively soft material, such as aluminum strands, will tuck into local dents in the aluminum elements constituting each layer. Occur. Even when the dent caused by this Nisoking is relatively small, the layer core diameter (D+'Dt) becomes small, and the electric current m4 is elongated.

If this exceeds a predetermined value, the mechanical strength of the electric wire 4 will be reduced. Therefore, in order to reduce this elongation, it is necessary to reduce the contact pressure P between the electric wire 4 and the metal wheel 2, and reducing the tension T is an extremely effective means for this purpose.

Recently, the ``prefabricated overhead wire method'' has been adopted for the purpose of facilitating line tensioning work after line extension and reducing the amount of work at high places such as on towers. This method is.

The distance between the wire support points of the steel tower is precisely determined by a total of 1flJ, and the length of the wire to be installed with a predetermined slack between the support points is calculated, and the wire is measured to this predetermined length in advance. ,
This measured electric wire is then installed between the towers.

Even in this prefabricated overhead wire method, the wires are passed through the metal wheel, and when the wire passes through the metal wheel during wire extension, the wire inevitably stretches due to the above-mentioned knocking. The wire length is set by estimating the amount. However, when the tension in the wire is high, the contact pressure with the metal wheel also increases, and the absolute amount of elongation increases, resulting in greater variation. When it is necessary to strictly equalize the slack and tension of each elementary conductor in one phase, as in the case of Not only does it not meet the original purpose of the method, but it is also considered to be the biggest reason why this method is difficult to adopt for long-distance line extension work in mountainous areas.

There is also a ``overhead wire method using a hanging wheel'' that performs wire extension work with low tension while maintaining distance between the wires and obstacles below them. In this method, as shown in FIG. 4, a supporting rope 13 of a hanging wheel 12 is installed in advance between steel towers with a slackness d, and a required plurality of hanging wheels 12...
12 are arranged at a required interval (1), and the electric wires 4 are hung and passed through the upper surfaces of the main wheels 14 of these hanging wheels. In this case, if the weight per unit length of the wire is W1, the span length (distance between the main wheels 14) is 11, and the horizontal tension of the wire is n, then the sag of the wire 4, ds, is expressed by the following formula: .

Therefore, even if the horizontal tension TL of the wire is sufficiently reduced, if the span length l is small, the wire sag ds will also be small, and the total wire sag d' (in Fig. 4, d'# d 10ds0Ad-Ah) can be made much smaller than the sag dl+ when the tension is TL in the case where the hanging wheels 12...12 are not used. In other words, this method has the effect of preventing the wire from sagging and reducing the wire tension, and is therefore an excellent method for installing wires. However, in actual wire installation work, the following There are many problems.

That is, as shown in the fourth section, each of the hanging wheels 12...12 is arranged at a predetermined interval (-/) position via a distance maintaining rope 15 installed between the steel towers. In order to remove the wire 4 from each hanging wheel 12...12 after the wire work is completed, the wire must be tensioned (tensioned) to a position where the slack is approximately equal to the slack of the support rope 13. ,
Either pull each of the hanging wheels 12...12 toward the steel tower via the distance maintaining rope 15, and remove the electric wire 4 from each of the hanging wheels 12...12 at the tower position, or pull the supporting rope 13 The operator has to stand in the air and remove each electric wire 4, and furthermore, in the case of installing a large number of electric wires, the above-mentioned work has to be repeated, making the installation work extremely inefficient.

c) Purpose of the present invention) The present invention makes use of the above-mentioned low-tension wire drawing using the hanging wheel, and achieves this more efficiently. In addition, by automatically (naturally) removing the wire from the hanging wheel after the wire has been laid, it is possible to improve the overall efficiency of the wire erection work and to reduce the risk of work during the work. The purpose is to eliminate the

(c) Method and structure of the present invention) The method of installing electric wires of the present invention is to install a support rope for a hanging wheel of an electric wire between towers while maintaining a required slack, and to install the electric wire at a plurality of locations on the overhead support rope. Hanging wheels with the upper part of the main wheel, through which the electric wires are hung, are open, are suspended so that they can move freely, and each of the hanging wheels is moved to a required spacing position via a distance maintaining rope installed between the towers. Next, wires are extended by passing them through the upper surface of the metal wheel mounted on each tower side and the upper surface of the main metal wheel of each hanging wheel. The electric wire is tensioned to a position where a predetermined slackness is smaller than the slackness of the support rope, and the electric wire is automatically separated from each of the hanging wheels when the wire is tightened. That is.

In addition, the hanging wheel for installing electric wires used to carry out this method includes an arm body, a hanging wheel for suspending an aerial support rope attached to the upper part of the arm body, and a lower part of the arm body. a main metal wheel for passing the electric wire hook through the wire hook mounted on a shaft at a position; an engagement/disengagement mechanism between the suspension metal wheel and the above-mentioned aerial support rope provided at a position close to the shafting portion of the suspension metal wheel; The electric wire hanger is comprised of a locking and disengaging mechanism between the arm body and the spacing rope provided at a predetermined position on the arm body, and the wire hook is configured to be open above the main wheel for threading. It is.

(Example) Hereinafter, the present invention will be explained based on the example diagrams shown in FIGS. 5 to 11.

FIGS. 5 and 6 show a hanging wheel 20 for installing electric wires. 221C The suspension metal wheels 23, 23 mounted on the shafts, the main metal wheel 25 for passing the electric wire hooks mounted on the horizontal shaft 24 installed between the lower positions of the above-mentioned arm bodies, and the above-mentioned suspension metal wheels The engagement and disengagement mechanisms 28, 28 between the suspension metal wheels and the support ropes 26, 26 are provided at positions close to the axle parts of the cars 23, 23, and the respective arm bodies 21, 21 are located at the required positions [provided]. It consists of an arm main body and an engagement/disengagement mechanism 30/30 between the spacing maintaining ropes 29/29. In addition, hinge parts 31 are provided at the center of each of the arm bodies 21, 21 for adjusting the rotation of the upper part of the arm in the left-right direction. Even if there is a wide/narrow difference between the ropes, it is possible to suspend the left and right suspension wheels 23, 23 on the ropes, respectively. Also, - Heki King's Golden Chariot 2
5 is one in which one or more wires are installed, but multiple wires 3
2...32 are installed on a plurality of shafts for the purpose of extending wires at the same time.

That is, in the illustrated example, three main wheels 25...25 are mounted on the shaft, and the electric wires 32, 32 are connected to the main wheels 25, 25 on both the left and right sides, and the main wheels 25, 25 in the middle are connected to the electric wires 32, 32, and 25 is provided so that a towing rope 33, which will be described later, and a towing rope 33', which will be used in the next work process, are respectively passed through. Further, an engagement/disengagement mechanism 28 between the suspension metal wheel 23 and the support rope 26 is provided on the outer surface of the arm body 21, and the mechanism includes an opening/closing plate 28a provided below the metal wheel 23, It consists of a hook 28b for locking the opening/closing plate,
When the opening/closing plate 28a is rotated laterally about its pivot 28c, a required passage 34 is constructed. Therefore, when the passage 34 is constructed, the support rope 26 is passed through the passage. It is provided so that it is possible to engage the lower surface side of the metal wheel 23 and to take out the engaged support rope 26 to the outside of the arm body 21. In this case, when the opening/closing plate 28a is locked via the hook 28b, the passage 34 is closed, so that when the metal wheel 23 is suspended on the support rope 26, the metal wheel 23 is not supported. Even when the rope 26 becomes detached, it is possible to eliminate operational dangers such as the hanging wheel falling.

Further, an engagement/disengagement mechanism 30 between the arm body 21 and the distance maintaining rope 29 is provided at an outer surface position of the arm body 21, and the mechanism is provided to protrude laterally at a position below the hinge portion 31. The installation bolt 30a! :.

A fixing nut 30b1 screwed onto the gilt, and a locking plate 30d whose one end is pivotally supported via a pivot 30c and whose other end is formed to engage with the planting bolt 30aVc.
The spacing maintaining rope 29 is comprised of the above-mentioned planted pole l-
It is held between the locking plate 30d engaged with the locking plate 30a and the arm body 21, and is also clamped by the nut 30b and locked to the arm body.

Further, the upper parts of the main metal wheels 25...25 are configured to be open, so that the electric wires 32...3
2 can be freely floated up from the upper surface of the main wheel 25 through between the left and right support ropes 26 during the tensioning work.

Left and right arm bodies 21 shown in the above embodiments
21d is installed vertically, but as in the second embodiment shown in FIG. You may try to improve it.

In addition, as in the third embodiment shown in FIG.
12 may be provided only on either the left or right side, but in this case, when the metal wheel 232 is suspended on the support rope 26□, the horizontal shaft 24□ that pivotally supports the main metal wheel 252...252. must be set horizontally.

As shown in the fourth embodiment shown in FIG.
Furthermore, as shown in the same embodiment drawing, an auxiliary arm main body 21 may be provided at the intermediate part of the left and right arm main bodies 213. The second to fourth embodiments shown in FIG. 9 are different from those of the first embodiment shown in FIGS. Since they are different in terms of the number of metal wheels 25, etc., constituent members that are substantially the same as those in the first embodiment drawings are given the same reference numerals.

Next, a case will be described in which electric wires are installed using a hanging wheel having the above configuration.

First, the following work is required as preparatory work for wire extension during the wire installation work. That is, Figures 5, 6, and 1
As shown in Figure 10, two support ropes 26, 26 are installed between each steel tower 35, 35 to support the hanging wheel 20, and the slackness of the support ropes is shown by the chain line in Figure 10. The slackness of the electric wires 32゛...32゛ after tensioning shown in is set to be slightly larger than that shown in .

Next, a required plurality of hanging wheels 20 are suspended on the support ropes 26, 26, respectively, with a required interval maintained therebetween.

To suspend the hanging wheel, remove the hooks 28b, 28b in the locking/disengaging mechanisms 28, 28, and open/close the opening/closing plates 28a, 28a.
As shown by the chain lines in FIG. 6, the support ropes 26, 26 are engaged with the lower surfaces of the suspension wheels 23, 23 through their constituent passages 34, 34, and the VC, the opening/closing plate 2
8a, 28a may be locked again with the hooks 28b, 28b. In addition, to maintain the spacing between the hanging wheels, each hanging wheel 20...
As described above, this is done by engaging each other via the engaging and disengaging mechanisms 30, 30. Therefore, the above-mentioned support ropes 26 and 26 are attached with another rope C (not shown) in advance, and each of the hanging wheels 20...20 is attached to the support ropes 26 and 26 on the steel tower 35 on one side. The distance maintaining ropes 2 are suspended and attached to each hanging wheel.
9 and 29 to the other steel tower 35 side via the above-mentioned another rope, each hanging wheel 20...20
Interval maintaining rope 29, 2 installed between steel towers 35, 35
9 at desired spacing positions.

In addition, ordinary metal wheels 36 for wire extension are respectively mounted on respective positions of the steel towers 35, 35, which are above the ball position of the main metal wheel 25 in the above-mentioned hanging metal wheel.

In the above state, the main metal wheel 25...25 on the hanging wheel
On the upper surface of the wire rolling wheels 36, 36 on the steel tower, two electric wires 32, 32, a temporary traction rope 33° to be used in the next work process, and a running board as shown in Fig. 11 are installed. Tow ropes 33 for towing are respectively hung and passed through the wires 37 to carry out the wire extension. In addition.

The above running board 37ha electric! 32, 32 and Herobe 33° and the traction rope 33 are connected.
As shown in (II) and (III) of FIG. 11, the running board has a U-shaped cross section.
is installed vertically, and this
, the traction rope 33 (33°) has a structure that allows it to bend and deform freely in the longitudinal direction and not bend and deform in the circumferential direction perpendicular to the longitudinal direction.
Even if a pulling tension is applied to the (loaf 33°), the weight of the E counter cut 38 prevents the running board 37 from rotating in the circumferential direction based on the return torque of the electric wire 32 (rope 33"). The main wheel 2
When passing 5...25 and the gold car, the (I) of the same figure
As shown in ll), there is no bending and deformation while engaging in the circumferential groove, and the passage of the groove is not obstructed, and
This rope 33° is engaged with the inside of the cross section (U-shaped groove) of the tight rope 38 to prevent it from falling off. In addition, when installing the traction rope 33 between the steel towers 35 and 35 during the first line extension work,
Each hanging wheel 20 to the above-mentioned support ropes 26, 26...
During the suspension arrangement work of 20, the main wheel 25 of the hanging wheel
...The 25VrC towing rope 33 can be passed through the hook.

After the above-mentioned line extension work, tension work will be carried out between the tension towers in the line extension section. At this time, when tension is applied to the wires 32 and 32, which are passed through the hanging wheels 25...25, as the tension increases, the wires are lifted one by one and automatically detached from the main wheel, leaving the tower 35.・It will be supported only by the gold wheels 36 and 36 of 35. Therefore, in this state, it is only necessary to tension the support ropes 26 to a position where the slackness is smaller than the slackness of the support ropes 26. In addition, in the above-mentioned "prefabricated overhead wire method", it is sufficient to clamp the electric wire at a predetermined length and place the electric wire at a support point to be placed at the time of erection.

When the first wire stretching and tensioning work described above is completed, the towing rope 33' used for the next work is on the metal wheel 36, so the next wire extension can be started 1" immediately, and the overall This will significantly improve work efficiency.

c) Effects of the present invention) This is because the method of the present invention uses a hanging wheel.

This makes it possible to reliably eliminate the adverse effects of high-tension wire drawing as described above. In particular, since it has very little adverse effect on the surface shape of the electric wire, it is the most suitable method for constructing wires, for example, when the surface of the electric wire is shaped to improve aerodynamic characteristics.

In addition to the above-mentioned effects, the method of the present invention has the following effects. That is, the electric wire is extended with the hook passing through the main metal wheel of the hanging wheel and the top surface of the metal wheel on the tower side, and
Since the wire automatically detaches from the VC from the hanging wheel when the wire is strained, it is possible to omit the work of pulling the famous metal wheel to the tower side, or the work of the worker riding in the air, compared to such conventional work. As a result, it is possible to save labor and increase the efficiency of the overall electric wire installation work, and to eliminate the dangers associated with the work.

Furthermore, since the hanging wheel of the present invention has a simple configuration, it is easy to manufacture and can be provided at low cost, and since it is easy to handle, the overall erection work can be simplified. It has excellent practical effects.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of the wire installation work, Figure 2 is an explanatory diagram of the contact pressure applied to the wire, Figure 3 is an end view showing the layer core diameter of the wire, and Figure 4 is a diagram showing the use of a hanging wheel. 5 and 6 are side views and front views showing the first embodiment of the hanging wheel of the present invention, and FIGS. Front views showing the second, third and fourth embodiments, FIG. 10 is a schematic explanatory diagram of the electric wire erection work by the method of the present invention, and ) is an explanatory diagram of the action of running boards and kakunkukueto used during wire extension work. 20... Hanging wheel, 21. Arm body, 23. Suspension wheel, 25. Main wheel, 26. Support rope, 28.
- Engagement/disengagement mechanism, 29... Spacing maintaining rope, (9)... Engagement/disengagement mechanism, 32/32゛... Electric wire, 35... Tower,
36...Golden car. Patent applicant Kyoei Densetsu Co., Ltd. Figure 1 Figure 4 Figure 2 Figure 3 Figure 2o Figure 8

Claims (2)

[Claims] (1) A support rope for the wire suspension wheel is installed between the towers with the required slack, and the upper part of the main wheel through which the wires are hung is opened at multiple points on the aerial support rope. Each of the hanging wheels is suspended so that it can travel freely, and each of the hanging wheels is placed at a required spacing position via a distance maintaining rope installed between the towers. An electric wire is passed through the upper surface of the metal wheel equipped with the wire and the upper surface of the main metal wheel of each hanging wheel, and the wire is then extended with a slackness smaller than that of the support rope. A method for constructing an electric wire, characterized in that the electric wire is tightened to a position where a predetermined slackness is achieved, and the electric wire is automatically detached from each of the hanging wheels when the electric wire is tightened. (2) The arm body, a metal wheel for suspending the aerial support rope attached to the upper part of the arm body, and a main metal wheel for passing the wires attached to the lower part of the arm body. , an engagement/disengagement mechanism between the suspension metal wheel and the aerial support rope provided at a position close to the shafting portion of the suspension metal wheel; and a spacing maintaining rope between the arm body and the above arm body provided at a predetermined position on the arm body. 1. A hanging wheel for installing electric wires, characterized in that the electric wire hook is configured to be open above the main wheel for passing through.