JPH09252513A - Method for attaching spacer for multiple conductors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for attaching a spacer for multiple conductors which requires no correction by a worker on board a pendent cage after the attachment. SOLUTION: When intending to attach a spacer onto multiple electric wires 10 stringed with a space to a vertical direction, the computed value of the catenary angle θ0 of the electric wires at attaching positions of each spacer is obtained based on a slackness calculating formula. When the spacer is attached onto the electric wires with a pendent cage 7, the actual catenary angle θ of the electric wires at attaching positions of the spacer is measured. Then, the spacer is attached onto each electric wire by shifting the attaching position P13 on the bottom wire 13a by a corrected amount R (to an attaching position Pb) obtained by a calculating formula R = Dtan (θ-θ0 (where D is the space from the top to bottom wires) against the right angle attaching position to the top wire 11a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting method for attaching a spacer to a plurality of electric wires (conductors) which are vertically extended and spaced between supporting points of a steel tower or the like, such as a power transmission line.

[0002]

2. Description of the Related Art Generally, power transmission lines between a power station and a primary substation, and between primary substations, include a skyline 11, 11, a midline 12, 12 and a ground line 1, as shown in FIGS.
In many cases, it is composed of 6 electric wires (6 conductors) 10 composed of 3 and 13, and in this case, the spacers 2 for holding the intervals between the electric wires are attached at a predetermined distance (for example, 30 to 50 m). This spacer 2 is usually attached to the electric wire 10
It is performed by a worker who rides on the airborne vehicle 7 traveling above, and the airborne vehicle usually has a large weight of about 500 kg, and the weights and spacer weights of 3 to 4 workers who ride on this are also added. Therefore, when mounting the spacer, a fairly large concentrated load is applied near the mounting position.

For this reason, the spacers, which are mounted at right angles to the electric wires at the time of mounting, become tilted and deviate from the right angles when the airborne vehicle is lowered from above the electric wires. This is not preferable because it is necessary to move on top of the vehicle without doing anything, which is troublesome and dangerous.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and aims to provide a method for mounting a multi-conductor spacer that does not require a correction work after mounting by an airborne vehicle. is there.

[0005]

A method for mounting a spacer for multiconductor according to the first invention of the present application, in mounting the spacer on a plurality of electric wires which are vertically wired with a space therebetween,
Calculate the calculated catenary angle θ ₀ of the wire at the mounting position of each spacer using the sag calculation formula, and then measure the catenary angle of the wire at the mounting position of the spacer when the spacer is mounted on the wire using the airborne machine. When θ is measured and the correction amount R calculated by the following formula is positive with respect to the mounting position perpendicular to the skyline, the mounting position on the ground line is shifted by the distance R in the traveling direction of the airborne vehicle. When the amount R is negative, the spacer is attached to each electric wire in a state where the attachment position on the ground line is shifted by a distance | R | in a direction opposite to the traveling direction of the airborne vehicle. R = Dtan (θ−θ ₀ ), where D is the distance between the top line and the ground line.

The method of mounting the spacer for multiple conductors according to the second invention of this application is such that, when the spacers are mounted on a plurality of electric wires that are vertically spaced at intervals, a mounting position of each spacer is calculated by a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the wire in the above and measure the catenary angle measurement value θ of the wire at the spacer mounting position when mounting the spacer to the wire using the airborne machine, and mount it at a right angle to the top line. With respect to the position, when the correction amount R according to the following calculation formula is positive, the mounting position on the ground line is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, it is on the ground line. The spacer is attached to each electric wire in a state where the attachment position is shifted by a distance | R | in a direction opposite to the traveling direction of the air vehicle. R = D [pi] ([theta]-[theta] ₀ ) / 180 where D: distance between top line and ground line. Angle unit: degree.

Further, according to a third aspect of the invention of this application, a method for mounting a spacer for a multi-conductor is such that, when the spacer is mounted on a plurality of electric wires which are vertically spaced from each other, a mounting position of each spacer is calculated by a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the wire in the above and measure the catenary angle measurement value θ of the wire at the spacer mounting position when mounting the spacer to the wire using the airborne machine, and mount it at a right angle to the top line. With respect to the position, when the correction amount R according to the following calculation formula is positive, the mounting position on the ground line is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, it is on the ground line. The spacer is attached to each electric wire in a state where the attachment position is shifted by a distance | R | in a direction opposite to the traveling direction of the air vehicle. R = 2Dsin [(θ−θ ₀ ) / 2] where D is the distance between the top line and the ground line.

The mounting method of the multiconductor spacer according to the fourth invention of this application is such that, when the spacers are mounted on a plurality of electric wires which are vertically spaced apart from each other, a mounting position of each spacer is calculated by a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the wire in the above and measure the catenary angle measurement value θ of the wire at the spacer mounting position when mounting the spacer to the wire using the airborne machine, and mount it at a right angle to the top line. With respect to the position, when the correction amount R according to the following calculation formula is positive, the mounting position on the ground line is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, it is on the ground line. The spacer is attached to each electric wire in a state where the attachment position is shifted by a distance | R | in a direction opposite to the traveling direction of the air vehicle. R = Dsin (θ−θ ₀ ), where D is the distance between the top line and the ground line.

The mounting method for a multiconductor spacer according to the fifth aspect of the present application is such that, when the spacers are mounted on a plurality of electric wires which are vertically spaced at intervals, a mounting position of each spacer is calculated by a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the electric wire in, and measure the catenary angle measurement value θ of the electric wire at the mounting position of the spacer at the time of attaching the spacer to the electric wire using the airborne machine. When the correction amount R calculated by the following formula is positive with respect to the mounting position, the mounting position on the skyline is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, on the skyline. The spacer is attached to each electric wire in a state in which the mounting position of is shifted by a distance | R | in a direction opposite to the traveling direction of the airborne vehicle. R = Dtan (θ ₀ −θ) where D: distance between the sky line and the ground line.

The mounting method of the multiconductor spacer according to the sixth invention of the present application is such that, when the spacers are mounted on a plurality of electric wires which are vertically spaced at intervals, a mounting position of each spacer is calculated by a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the electric wire in, and measure the catenary angle measurement value θ of the electric wire at the mounting position of the spacer at the time of attaching the spacer to the electric wire using the airborne machine. When the correction amount R calculated by the following formula is positive with respect to the mounting position, the mounting position on the skyline is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, on the skyline. The spacer is attached to each electric wire in a state in which the mounting position of is shifted by a distance | R | in a direction opposite to the traveling direction of the airborne vehicle. R = Dπ (θ ₀ −θ) / 180 where D is the distance between the sky line and the ground line. Angle unit: degree.

Further, according to the seventh aspect of the present invention, the spacer for multi-conductors is mounted by mounting the spacers on a plurality of electric wires which are vertically spaced apart from each other by using a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the electric wire in, and measure the catenary angle measurement value θ of the electric wire at the mounting position of the spacer at the time of attaching the spacer to the electric wire using the airborne machine. When the correction amount R calculated by the following formula is positive with respect to the mounting position, the mounting position on the skyline is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, on the skyline. The spacer is attached to each electric wire in a state in which the mounting position of is shifted by a distance | R | in a direction opposite to the traveling direction of the airborne vehicle. R = 2Dsin [(θ ₀ −θ) / 2] where D is the distance between the top line and the ground line.

Further, according to an eighth aspect of the present invention, the spacer for multi-conductors is mounted by mounting the spacers on a plurality of electric wires which are vertically spaced apart from each other by a sag calculation formula. Calculate the calculated catenary angle θ ₀ of the electric wire in, and measure the catenary angle measurement value θ of the electric wire at the mounting position of the spacer at the time of attaching the spacer to the electric wire using the airborne machine. When the correction amount R calculated by the following formula is positive with respect to the mounting position, the mounting position on the skyline is shifted by the distance R in the traveling direction of the airborne vehicle, and when the correction amount R is negative, on the skyline. The spacer is attached to each electric wire in a state in which the mounting position of is shifted by a distance | R | in a direction opposite to the traveling direction of the airborne vehicle. R = Dsin (θ ₀ −θ) where D is the distance between the top line and the ground line.

In the present invention, the catenary angle measured value θ and the catenary angle calculated value θ ₀ are angles on the airborne vehicle advancing direction side, and the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. .

In the first to fourth aspects, not only the mounting position on the ground line but also the mounting position on the center line is (d / D) | R | in the same direction as the shift direction of the mounting position on the ground line. (However, d: Space dimension in the side view of the top line to the center line.) If the spacers are mounted on the center line in the shifted state, the mounting positions of the spacer lines will surely be on the same plane. From the viewpoint, the spacer is not particularly folded, which is particularly preferable.

In the fifth to eighth inventions, not only the mounting position on the skyline but also the mounting position on the center line is (d / D) | R | in the same direction as the shift direction of the mounting position on the skyline. (However, d: distance between the ground line and the center line in the side view.) If the spacers are mounted on the center line in the shifted state, the mounting positions of the lines of the spacer are surely on the same plane. It is particularly preferable because the spacer is not folded in the center when viewed from the side.

In the present invention, it is preferable to add the weight of the spacer to the weight of the electric wire when calculating the calculated value of the catenary angle θ ₀ of the electric wire, since a highly accurate calculated value close to the actual spacer attachment state can be obtained. The weight of this spacer may be a concentrated load at each spacer mounting position, but if the total weight of the spacer is divided by the total wire length (distance between supporting points) and added to the wire's own weight, the above distributed load will be the wire's own weight. Since it is relatively small, a sufficiently high-precision calculated value can be obtained, and the calculation is easy, which is particularly preferable.

In the present invention, the calculated value of the catenary angle θ ₀ of the electric wire is calculated by using the catenary formula or the parabolic formula as an approximate formula (including the sag tension formula).
It is possible to perform the calculation by using a commonly-used electronic computer sag calculation program, and the calculation can be performed quickly and accurately. If the program for calculating the degree of sag does not include the program for calculating the catenary angle at any position on the wire (each spacer mounting position), calculate the lowest point of the wire between the spans and Based on the horizontal distance x to the spacer mounting point, the catenary angle θ ₀ at each spacer mounting point can be calculated by the following formula (a) when using the catenary system and by the following formula (b) when using the parabolic system. Good. An electronic calculator should be used for these calculations. tan θ ₀ = sinh (x / c) (a) tan θ ₀ = (W / T) · x (b) where c = T / WT T = horizontal tension W = unit weight of wire

[0018]

The reason why the spacer is attached at a substantially right angle to each electric wire after the spacecraft is lowered by shifting the correction amount R according to the following formula (1) in the first invention is shown in FIG. Will be described. R = Dtan (θ−θ ₀ ) ... (1)

FIG. 1 is a side view of a 6-conductor power transmission line with the middle line omitted, where 11 is a skyline in a free suspension state on which an airborne vehicle is not mounted, and 13 is a ground line in the same state. Also one
Reference numeral 1a denotes a skyline in a state where an air vehicle (not shown) is stopped near the mounting position Pn for mounting the spacer 2 at the mounting position Pn, and 13a denotes a ground line in the same state.

The catenary calculation value of the ceiling line 11 (and the ground line 13) in the state where the airborne vehicle is not mounted is θ ₀ , and the spacer 2 mounted at right angles to these electric wires is the spacing between the supporting points of the electric wires. Since the distance dimension D between the sky line and the ground line is sufficiently small compared to the above, the space liner is almost perpendicular to the position of the spacer 2b indicated by the chain line together with the sky line 11a (and the ground line 13a) whose actual catenary value was θ when the airborne vehicle got on. Down to
When the air vehicle is lowered, it will rise almost vertically to the position indicated by 2.

The angle α formed by the spacer 2a and the spacer 2b mounted at a right angle to the ceiling line 11a (and the ground line 13a) on which this airborne vehicle is mounted is defined by the spacer 2 and the spacer 2a.
Angle, i.e. equal to [theta-theta _0] (spacer 2
And 2b are parallel to each other), the triangle ΔPn ₁ Pn ₃ Pb is a right triangle, so from the mounting position Pn _{3 of} the spacer 2a with respect to the ground line 13a, Dtan (θ-θ ₀ ), that is, the equation (1) The spacer 2 is attached to the mounting position Pb shifted by the obtained correction amount R in the traveling direction of the air vehicle as indicated by the arrow X.
When the lower end of a is attached, the spacer in this attached state substantially coincides with the spacer 2b. Therefore, if the airborne vehicle is lowered, the position of the spacer 2, that is, the top line 11 (and the ground line 1).
The mounting state is almost perpendicular to 3).

The length of Pn ₁ Pb in FIG. 1 (point Pn ₁
Strictly speaking, the linear length between Pb and Pb is not equal to D. Therefore, when the lower end of the spacer 2a is mounted at the above shift position, the mounting position is slightly above the point Pb (see FIG. However, since the angle α is about 5 degrees at the maximum, the amount of displacement of the point Pb is negligible (sec 5 ° = 1.0038), and the above-mentioned FIG. It has almost no effect on the calculation of the correction amount of the basic equation (1).

Next, the following (2) in the second to fourth inventions is given.
With reference to FIG. 2, the reason why the spacers are attached at substantially right angles to the respective electric wires after the airborne vehicle is lowered by shifting the correction amount R according to the equations (4) will be described.
The unit of θ and θ _{0 in} the equation (2) is degree,
π (θ−θ ₀ ) / 180 is a conversion of (θ−θ ₀ ) to radians. R = Dπ (θ−θ ₀ ) / 180 (2) R = 2D sin [(θ−θ ₀ ) / 2] (3) R = D sin (θ−θ ₀ ) (4)

As described above, the angle α (= θ−θ ₀ ) is about 5 degrees at the maximum, but in FIG. 2, this angle α is shown to be larger than that in FIG. The same portions and the same dimensions as those of are denoted by the same reference numerals. In the figure, the length of Pn ₃ Pb is R of the formula (1) as described above.
And the arc length of an arc Pn ₃ Pc on a circle centered on Pn ₁ and having a radius D (illustrated by a broken line) is R in the equation (2), and the length of the chord of Pn ₃ Pc of the same circle. Is R, Pn ₃ P in the equation (3)
It is clear from the relationship between each triangle and the radian that the length of d corresponds to R in equation (4) (where α = θ−
θ ₀ ).

As described above, since the angle α is about 5 degrees at the maximum, the relationship of tan α = απ / 180 = 2 sin (α / 2) = sin α approximately holds within this angle range. By the way, tan5 °: 5π / 18
0: 2 sin 2.5 °: sin 5 ° = 1.0: 0.99
75: 0.9971: 0.9662, and the difference between the values, and hence the difference between R in the expressions (1) to (4) is the maximum (tan5
(Difference between ° and sin 5 °) is only 0.4%. Therefore,
Under the actual spacer mounting condition in which the angle α is about 5 degrees at the maximum, the first amount may be obtained by shifting the correction amount R by any of the expressions (2) to (4) instead of the expression (1). In the same manner as in the above invention, it is possible to obtain the mounting state of the spacers which are substantially perpendicular to each electric wire.

In the first aspect of the invention, the ceiling line 11a is maintained without changing the mounting position Pn ₃ on the ground line 13a in FIG.
If the mounting position Pn ₁ to the space is shifted by the same value as in the formula (1) in the direction opposite to the traveling direction of the airborne vehicle, when the airborne vehicle is lowered due to the same relationship as described above, the spacer 2a is placed on the skyline. 11 (and the ground wire 13) is almost perpendicular to the mounting state. Since this shift is opposite to the direction of the arrow X, the shift amount R is equal to the value obtained by adding a minus to the right side of the equation (1), and if this is transformed, [θ-θ ₀ ] is less than ± 90 degrees, so R =- Dtan (θ−θ ₀ ) = Dtan (θ ₀ −θ) (5), which is the shift amount calculation formula in the fifth aspect of the invention. After the shift, the spacer 2c shown by the broken line in FIG.
In this state, the spacer 2b is mounted parallel to the spacer 2b at a position | R | opposite to the traveling direction of the air vehicle.

Similarly, in the second to fourth inventions, the ceiling line 11 is not changed while the mounting position Pn ₃ to the ground line 13a is not changed.
Even if the mounting position Pn ₁ to a is shifted by the same value as in the formulas (2) to (4) in the direction opposite to the traveling direction of the airborne vehicle,
A spacer attachment state similar to that of the fifth invention is obtained,
As in the case of the equation (5), by adding a minus to the right side of the equations (2) to (4) and transforming, R = Dπ (θ ₀ −θ) / 180 (6) R = 2Dsin [(θ ₀ −θ) / 2] (7) R = Dsin (θ ₀ −θ) (8) The shift amount calculation formulas of the sixth to eighth inventions are obtained. Then, the spacer after the shift is attached at substantially the same position as the spacer 2c in FIG.

The above Figures 1 and 2 in the description of the shows the case wires before down toward the traveling direction of the air-ride machine, a positive downward on formulas, the angle theta and theta ₀ horizontal line h as the reference line Therefore, [θ-θ ₀ ] is positive, [θ _0- θ]
Is negative, and the correction amount R in the equations (1) to (4) is positive,
The correction amount R in the equations (5) to (8) becomes negative and coincides with each shift direction. Further, the case where the electric wire goes up in the traveling direction of the airborne vehicle corresponds to the case where the airborne vehicle traveling direction X and the horizontal line h are set to the right in FIG. By setting the direction opposite to that of the case, the same spacer attachment state as in each of the above cases can be obtained. Then, in the mathematical expression, the angles θ and θ ₀ are negative with the horizontal line h as a reference line, and therefore, in the case of the previous upward movement, [θ−θ ₀ ] is negative and [θ ₀ −θ] is positive, The correction amount R in equations (1) to (4) is negative, and (5) to
The correction amount R in the equation (8) becomes positive and coincides with the shift direction (the opposite direction to the case of the forward downhill).

In the above description of the operation, the description of the middle wire is omitted. However, if the spacer has a high rigidity, if the attachment position of the top line and the ground line is determined and the spacer is attached at that position, the middle line is attached. Since the position of the attachment clamp 22 (see FIG. 6) is automatically determined, the attachment to the center line may be performed as it is after the top line and the ground line. Further, the rigidity of the spacer is relatively small and the clamp tool 22 in the open state is used.
When the sliding frictional force with respect to the electric wire is large, it is preferable to shift the mounting position of the ground wire or the top wire according to the above equations as well as the mounting position of the middle wire. The correction amount (shift amount) of the middle line at this time is that the middle line mounting position is also on the straight lines 2a to 2c in FIGS. 1 and 2,
The line spacing in the side view from the top line (in the case of claims 1 to 4) or the ground line (in the case of claims 5 to 8) to the center line that does not shift the mounting position is d (in the case of 6 conductors, refer to FIG. 4). ), A value in which d is used instead of D in the above equations, that is, (d / D) × R. Therefore, with respect to the mounting position perpendicular to the top line or the ground line, the spacer with the mounting position on the midline shifted by (d / D) | R | in the same direction as the shift position of the mounting position on the ground line or the top line. If is attached to the center line, the top line, middle line, and ground line of one spacer are aligned on a straight line when viewed from the side, so the spacer does not fold and a good mounting appearance can be obtained. Of.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of the first invention will be described below with reference to FIGS. In this specific example, the six electric wires 10 shown in FIG. 5 supported between the steel towers 3 and 4 in FIG. 2 (however, the electric wire is shown as a single wire) showing a part of the power transmission line, that is, two heaven lines 11 each, On line 12 and ground line 13,
Attach the seven spacers 2. P _{1 to} P ₇ are the first
~ Shows the mounting position of the seventh spacer. The unit weight of each wire is 2.614 Kg / m, and the space dimension D between the top wire 11 and the ground wire 13
Is 1386 mm, and the electric wire 10 has a span length S = 337.45 m and a supporting point height difference H = 1 as shown in FIG.
An overhead wire is installed between the 2.54 m steel towers 3 and 4, and the connection with the steel tower is a tension insulator device 5 (length 8.935 m, weight 2083 K).
g). 6 is a jumper.

Spacer spacing along the wires of the _first to seventh spacers (mounting positions P _{1 to} P ₇ ) that are sequentially mounted from the steel tower 3 side (however, the first spacer is the distance from the tip of the insulator)
Is as shown in Table 1, and the calculation result of the calculated catenary angle θ ₀ at each spacer position is as shown in the same table. The calculation of the calculated value of the catenary angle θ ₀ was performed by an electronic calculator using a sag calculation program based on the catenary formula. At this time, the weight of the spacer 2 (32 kg × 7 pieces) was calculated as the span length × the number of electric wires. The calculation was performed by dividing by (6) and adding 0.111 Kg / m to the wire weight. In Table 1, the unit of the spacer interval is m, the unit of the catenary angle is degree, and the value of the catenary angle θ ₀ is rounded off to two decimal places.

[0032]

[Table 1]

Further, in this specific example, the calculation by the above equation (1) was used by preparing a numerical table in which the correction amount R can be directly read from the actual catenary angle measurement value θ for each spacer number (position). This table is as shown in Tables 2 and 3. First, the angle is set to 0.5 in consideration of the accuracy of the angle measurement and the shift amount (correction amount) measurement by the worker on the air vehicle.
The degree and shift amount are 1 cm as the minimum unit, and the calculated value of the catenary angle θ ₀ rounded in units of 0.5 degree is used as the reference angle of the correction amount of 0 cm, and each catenary angle of 0.5 degree step before and after this reference angle. The measured value θ is calculated according to the equation (1) (for example, R = Dtan1 ° = 24 mm), rounded for every 1 cm (for example, 2.4 → 2 cm), and tabulated.

[0034]

[Table 2]

[0035]

[Table 3]

Next, an actual spacer 2 using the above numerical table and the like
4 will be described by taking the first spacer as an example. The airborne machine 7 placed on the electric wire 10 and operated by an operator (not shown) operates the airborne machine 7, and when the mounting position P ₁ of the first spacer 2 is reached, the airborne machine 7 is stopped. In this specific example, this positioning is performed by measuring the distance from the clamp tip of the middle wire 12a (the wire gripping portion of the tension insulator device 5) with a rotating roller type distance measuring device that engages with the one middle wire 12a. It was done. Then, at this mounting position, first, using a right-angled ruler 8, each electric wire is marked with mounting positions P ₁₂ and P ₁₃ that are perpendicular to the ceiling wire 11a.

Next, when the actual measurement angle θ of the catenary with respect to the horizontal line h at the first spacer mounting position P ₁ was measured by the angle measuring device (inclinometer) 9 on the center line 12a, it was 9 degrees. The correction amount R = 10 cm is read from 2 and the mounting position on the ground wire 13a is read from the position P ₁₃ to R = 10.
The mounting position Pb shifted by cm in the air travel direction (arrow X direction) is marked, and the distance d between the top line 11a and the center line 12a in the side view (FIG. 4) is 1/2 of the above D. The mounting position of the wire 12a is 1/2 of the above R
The position Pe shifted by (5 cm) was marked, and the spacer 2 was clamped to the wires at the mounting positions P ₁ , Pe and Pb, respectively, to complete the mounting of the first spacer.

Similarly, the attachment of spacers at other positions can be performed quickly and easily by using Tables 2 and 3.
Specifically, the mounting positions P _{2 to} P _{7 of the second to} seventh spacers
Since the actually measured catenary angle θ (degree) in Table 1 was as shown in Table 1, the spacers were sequentially attached using Tables 2 and 3 in the same procedure as the first spacer. The underlined numerical values in the table are the catenary angle measured values θ of the spacers of this embodiment, and the shift was performed according to the value of the correction amount R in the upper column corresponding thereto. After mounting all the spacers, the airborne aircraft 7 was lowered and observed from the ground.
As shown in FIG. 5 showing an example of the first spacers, the angle formed by each spacer 2 and the electric wire 10 was substantially a right angle.

Next, in the above concrete example, the above formulas (2) to (4) of the second to fourth inventions are used in place of the formula (1), and the other conditions are the same as those of the above concrete examples (steel tower, electric wire, spacer). The specifications and mounting positions) of the above example were used to prepare a numerical table in which the correction amount R similar to the above specific example can be directly read, and the same numerical tables as those in Tables 2 and 3 were obtained. Therefore, also in the concrete examples of the second to fourth inventions, the spacer mounting work having the same contents as in the concrete example is carried out using Tables 2 and 3 described above.

In the above specific example, the mounting position of the top wire 11 is not shifted, but the mounting position of the ground wire 13 is shifted.
In the fifth to eighth inventions, instead of shifting the mounting position of the ground wire 13, the mounting position of the skyline 11 may be shifted in the opposite direction. When a numerical table that can directly read the correction amount R similar to the above-mentioned specific example is used under the same conditions as in the above-mentioned specific example, the signs of the correction amount R in the uppermost columns of the above-mentioned Tables 2 and 3 are reversed (in the table). 2: -10 cm to 0 cm, Table 3: 0 cm to 1
0 cm), the other values in the table will be exactly the same.

The present invention is not limited to the above specific example, and for example, the calculated value of the correction amount R may be represented by a numerical table in a format other than the above numerical table. If the spacer 2 has a large rigidity, etc., (1
The marking of the shift amount of / 2) R may be omitted.
The units of the catenary angle calculation value θ ₀ and the actual measurement value θ in the formulas (1) to (8) other than the formulas (2) and (6) are radians instead of the degrees. Can be used (especially in the case of actual measurement, which is not common and difficult to adopt). When radians are used as the units of θ ₀ and θ in the second and sixth inventions, the following formula (2 ′) is replaced by the formula (6) instead of the formula (2).
The following formula (6 ') may be used instead of the formula. R = D (θ−θ ₀ ) ... (2 ′) R = D (θ ₀ −θ) ...... (6 ′)

The present invention can also be applied to a method of mounting a multi-conductor spacer other than 6 conductors, for example, in the case of 8 conductors.

[0043]

As described above, according to the present invention,
When the spacer is attached to the wire by the airborne machine, the spacer can be attached to the wire with the airborne machine down by a simple work of shifting (shifting) the mounting position of the spacer on the ground line or the top line. The resulting installation state is almost right angle, and the subsequent repair work by bare riding is not necessary, and the work period for overhead line construction is shortened with no manual labor, contributing to improved safety.

[Brief description of drawings]

FIG. 1 is a side view showing the positions of electric wires and spacers that change depending on the presence or absence of an air vehicle in the present invention.

FIG. 2 is a side view of the electric wire and the spacer when the airborne structure is provided, showing the relationship of the correction amount R by each calculation formula in the present invention.

FIG. 3 is a support line diagram of an electric wire showing an example of the present invention.

FIG. 4 is a side view showing a method of mounting the first spacer in FIG.

5 is a side view after mounting the spacer in FIG. 4. FIG.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

[Explanation of symbols]

2 ... spacer, 2a ... spacer, 2b ... spacer, 3 ...
Steel tower, 4 ... Steel tower, 7 ... Aircraft, 10 ... Electric wire, 11 ... Skyline, 11a ... Skyline, 12 ... Midline, 12a ... Midline, 13 ...
Ground line, 13a ... Ground line.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinichi Watanabe, Inventor Shinichi 3-chome, 1-32 Minato-ku, Nagoya City Toenec Main Store Annex Building (72) Inventor Junji Ohori 3-chome, 1-3-2 Minato-ku, Nagoya Toeneck head office annex in stock company

Claims (11)

[Claims] 1. When mounting a spacer on a plurality of electric wires that are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at the mounting position of each spacer is calculated by a sag calculation formula, When the spacer is attached to the electric wire using a rider, the actual measurement value θ of the electric wire's catenary angle at the spacer installation position is measured, and the correction amount R calculated by the following formula is positive with respect to the installation position perpendicular to the top line. Is a state in which the mounting position on the ground line is shifted in the traveling direction by the distance R, and when the correction amount R is negative, the mounting position on the ground line is opposite by the distance | R | A method for mounting a multi-conductor spacer, characterized in that the spacer is mounted on each electric wire while being shifted in the direction of. R = Dtan (θ−θ ₀ ), where D is the distance between the top line and the ground line. θ, θ ₀ : Angles on the traveling direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 2. When mounting a spacer on a plurality of electric wires that are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at each spacer mounting position is calculated by a sag calculation formula, When the spacer is attached to the electric wire using a rider, the actual measurement value θ of the electric wire's catenary angle at the spacer installation position is measured, and the correction amount R calculated by the following formula is positive with respect to the installation position perpendicular to the top line. Is a state in which the mounting position on the ground line is shifted in the traveling direction by the distance R, and when the correction amount R is negative, the mounting position on the ground line is opposite by the distance | R | A method for mounting a multi-conductor spacer, characterized in that the spacer is mounted on each electric wire while being shifted in the direction of. R = D [pi] ([theta]-[theta] ₀ ) / 180 where D: distance between top line and ground line. θ, θ ₀ : Angles (unit: degrees) on the advancing direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 3. When mounting a spacer on a plurality of electric wires that are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at the mounting position of each spacer is calculated by a sag calculation formula, and the space is calculated. When the spacer is attached to the electric wire using a rider, the actual measurement value θ of the electric wire's catenary angle at the spacer installation position is measured, and the correction amount R calculated by the following formula is positive with respect to the installation position perpendicular to the top line. Is a state in which the mounting position on the ground line is shifted in the traveling direction by the distance R, and when the correction amount R is negative, the mounting position on the ground line is opposite by the distance | R | A method for mounting a multi-conductor spacer, characterized in that the spacer is mounted on each electric wire while being shifted in the direction of. R = 2Dsin [(θ−θ ₀ ) / 2] where D is the distance between the top line and the ground line. θ, θ ₀ : Angles on the traveling direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 4. When attaching a spacer to a plurality of electric wires which are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at the mounting position of each spacer is calculated according to a sag calculation formula, and the space is calculated in advance. When the spacer is attached to the electric wire using a rider, the actual measurement value θ of the electric wire's catenary angle at the spacer installation position is measured, and the correction amount R calculated by the following formula is positive with respect to the installation position perpendicular to the top line. Is a state in which the mounting position on the ground line is shifted in the traveling direction by the distance R, and when the correction amount R is negative, the mounting position on the ground line is opposite by the distance | R | A method for mounting a multi-conductor spacer, characterized in that the spacer is mounted on each electric wire while being shifted in the direction of. R = Dsin (θ−θ ₀ ), where D is the distance between the top line and the ground line. θ, θ ₀ : Angles on the traveling direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 5. When attaching a spacer to a plurality of electric wires that are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at each spacer attachment position is calculated by a looseness calculation formula, When mounting the spacer to the electric wire using a rider, measure the actual measured value of the catenary angle θ of the electric wire at the mounting position of the spacer, and for the mounting position perpendicular to the ground line, the correction amount R calculated by the following formula is positive. When the installation position on the skyline is shifted by the distance R in the traveling direction of the air vehicle, when the correction amount R is negative, the installation position on the skyline is the distance | R | A method for mounting a spacer for multiple conductors, characterized in that the spacer is mounted on each electric wire while being shifted in the opposite direction. R = Dtan (θ ₀ −θ) where D: distance between the sky line and the ground line. θ, θ ₀ : Angles on the traveling direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 6. When a spacer is attached to a plurality of electric wires that are vertically suspended at intervals, the calculated catenary angle θ ₀ of the electric wire at the mounting position of each spacer is calculated using a sag calculation formula, and the space is calculated. When mounting the spacer to the electric wire using a rider, measure the actual measured value of the catenary angle θ of the electric wire at the mounting position of the spacer, and for the mounting position perpendicular to the ground line, the correction amount R calculated by the following formula is positive. When the installation position on the skyline is shifted by the distance R in the traveling direction of the air vehicle, when the correction amount R is negative, the installation position on the skyline is the distance | R | A method for mounting a spacer for multiple conductors, characterized in that the spacer is mounted on each electric wire while being shifted in the opposite direction. R = Dπ (θ ₀ −θ) / 180 where D is the distance between the sky line and the ground line. θ, θ ₀ : Angles (unit: degrees) on the advancing direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 7. When attaching a spacer to a plurality of electric wires that are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at the mounting position of each spacer is calculated by a sag calculation formula, and the space is calculated. When mounting the spacer to the electric wire using a rider, measure the actual measured value of the catenary angle θ of the electric wire at the mounting position of the spacer, and for the mounting position perpendicular to the ground line, the correction amount R calculated by the following formula is positive. When the installation position on the skyline is shifted by the distance R in the traveling direction of the air vehicle, when the correction amount R is negative, the installation position on the skyline is the distance | R | A method for mounting a spacer for multiple conductors, characterized in that the spacer is mounted on each electric wire while being shifted in the opposite direction. R = 2Dsin [(θ ₀ −θ) / 2] where D is the distance between the top line and the ground line. θ, θ ₀ : Angles on the traveling direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 8. When mounting a spacer on a plurality of electric wires that are vertically suspended at intervals, a calculated catenary angle θ ₀ of the electric wire at the mounting position of each spacer is calculated by a sag calculation formula, When mounting the spacer to the electric wire using a rider, measure the actual measured value of the catenary angle θ of the electric wire at the mounting position of the spacer, and for the mounting position perpendicular to the ground line, the correction amount R calculated by the following formula is positive. When the installation position on the skyline is shifted by the distance R in the traveling direction of the air vehicle, when the correction amount R is negative, the installation position on the skyline is the distance | R | A method for mounting a spacer for multiple conductors, characterized in that the spacer is mounted on each electric wire while being shifted in the opposite direction. R = Dsin (θ ₀ −θ) where D is the distance between the top line and the ground line. θ, θ ₀ : Angles on the traveling direction of the airborne vehicle, where the downward angle is positive and the upward angle is negative with the horizontal line as the reference line. 9. A mounting position perpendicular to the top line,
The spacer is attached to the center line in a state where the attachment position on the center line is shifted by (d / D) | R | in the same direction as the shift position of the attachment position on the ground line. How to install the multi-conductor spacer. However, d: space dimension in the side view from the top line to the middle line. 10. A state in which the mounting position on the center line is shifted by (d / D) | R | in the same direction as the shifting position of the mounting position on the top line with respect to the mounting position perpendicular to the ground line. 9. The method for mounting a multi-conductor spacer according to claim 5, 6 or 7 or 8, wherein the spacer is mounted on the center wire. However, d: the space dimension in the side view of the ground line to the center line. 11. The method according to claim 1, wherein the weight of the spacer is added to the weight of the electric wire to calculate a calculated value of the catenary angle θ ₀ of the electric wire. How to install the multi-conductor spacer.