JP3256774B2 - Tensioning method for overhead power transmission lines, tension insulator device for multiconductor and bolt type tension clamp used in this tensioning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensioning method for an overhead transmission line, a multiconductor tension insulator device and a tension clamp used in the tensioning method.

[0002]

2. Description of the Related Art In this type of conventional cable-tightening method, a cam-along is generally attached to a power transmission line to temporarily tighten the cable, and then, an electric wire near a tower is lifted from a cam-along mounting position, and the electric wire is attached to a conductor side of an insulator series. The wedge-shaped anchoring clamp was attached to an appropriate position based on the marking position, and the wedge-shaped anchoring clamp was connected to the conductor-side yoke.

[0003] In contrast to the above-described tensioning method, marking is performed on the position of the wire such that the mounting position of the wedge-shaped retaining clamp applies a predetermined tension to the wire when the wire is erected.
By attaching a wedge-shaped anchor at the king position,
A method of tightening an overhead transmission line that does not require the installation of the cam-along and its related work has been proposed (Japanese Patent Publication No. 57-5).
No. 8842).

[0005] In this tensioning method, as shown in FIGS. 15 and 16, after the extension is completed, a wedge 77 and a holding member 78 are attached to the electric wire 25 with a U bolt 79 and a nut 80 at a wedge-shaped retaining clamp mounting position P of the electric wire 25. When attached, the clamp body 81 is
7, a clamp body 81 is moved, a wedge 77 is inserted into the main body, and a wedge-shaped retaining clamp 82 is fixed to the electric wire 25 using a wedge mechanism.

[0005] The wedge-shaped retaining clamp 82 has a connecting plate 83.
Is connected to a snatch fishing wheel 85, and a snatch fishing wheel 88 attached to a steel tower 86 via a wire 87 and a wire 89 wound around the snatch fishing wheel 85 are one of the ones pulled out from the fishing wheel 85. Connect the wire 90 to the yoke 9
1 is connected to the connecting plate 83 and the yoke 91 of the anchoring clamp 82 by pulling the other wire 94 hanging from the fishing wheel 88 through the pulley 93 attached to the steel tower 86 downward. The connection accessory 96 is brought close to the connection.

[0006]

However, in this tensioning method, the distance between the two fishing wheels 85 and 88 is shortened by pulling the wire 94, and at the same time, the connecting plate 83 of the wedge-shaped anchoring clamp 82 is pulled.
And the construction hole 92 of the yoke 91 approach.
A snatch fishing wheel 85 is interposed between the hole 3 and the construction hole 92, and a connection fitting 96 is attached to the wedge-shaped clamp 82.
Is displaced in the left-right direction from the straight line connecting the center of the puller 84 and the construction hole 92 of the yoke 91, so that it is difficult to connect the connection fitting 96 and the wedge-shaped retention clamp 82 for work at a high place. was there.

[0007] The position P at which the wire 25 is attached
In order to attach the wedge-shaped holding clamp 82 to the wire, the worker moves to the holding clamp mounting position P while riding on the electric wire 25, removes the wedge 77 and the holding metal 78 from the brought wedge-shaped holding clamp 82, and removes the U bolt 79, When the nut 80 is tightened to the electric wire 25, the clamp body 8 is located slightly in front of the wedge 77.
Since the work of temporarily attaching 1 and moving it, inserting the wedge 77 into the clamp body and fixing it to the electric wire 25 using the wedge mechanism is performed in a state of riding on the electric wire, it is very troublesome and dangerous. Was something.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a method for tightening an overhead transmission line capable of easily performing the operation of tightening an overhead transmission line, and a multi-conductor tension insulator for use therein. It is an object to provide a device and a bolt-type tension clamp.

[0009]

According to a first method of tightening an overhead transmission line according to the present invention, a bolt type is provided at a tension clamp mounting position P marked on each of two extended right and left electric wires. The tension clamps 28, 62 are fixed on the jumper side, and are suspended on the support arm 24 of the power transmission tower, and the multi-conductor tension insulator devices 1, 38, 43 lacking the bolt type tension clamps 28, 62. And the two left and right electric wires extended,
Both ends of the conductor-side yokes 6, 40, 44 of the insulator series of the multi-conductor tension insulator devices 1, 38, 43 and the jumper-side ends of the bolt-type tension clamps 28, 28, 62, 62. The two tension-type pulleys 33, 33 connected to the tensioner are pulled up by shortening them, and the two tension-clamp connecting fittings 2 of the multi-conductor tension insulator devices 1, 38, 43 are attached to the two bolt-type tension clamps 28, 28.
1 and 21 are connected.

[0010] In the second tensioning method of the overhead transmission line according to the present invention, the span side clamp main body 65 is located at the tension clamp mounting position P marked on each of the two extended left and right electric wires. And the jumper-side clamp body 66 are detachably connected to each other, and only the span-side clamp body 65 of the bolt-type tension clamp 63 is fixed, and is suspended by the support arm of the power transmission tower and has the bolt-type resistance. The multi-conductor tension insulator devices 1, 38, 43 lacking the tension clamps 63 and the two extended left and right electric wires are connected to the conductor-side yaw of the insulator series of the multi-conductor tension insulator devices 1, 38, 43.金 6,40,44 and both spanning wheel wheels 33,33 connected to both span side clamp body portions 65,65 and the insulator side of the clamps are shortened,
The two tension-side clamp clamps 21, 22 of the multi-conductor tension insulator devices 1, 38, 43 are attached to both span side clamp body portions 65, 65.
1 are connected, and the jumper-side clamp main bodies 66, 66 are connected to the span-side clamp main bodies 65, 65.

In the multi-conductor tension insulator devices 1, 38, upper and lower horizontal yokes 10, 12 are connected to the conductor side yokes 6, 40 of the insulator series 2, 39 via the vertical yoke 8. Then, the bolt type tension clamps 28, 62, 63 are connected via the slack adjusting metal fittings 16 having tension wire wheel mounting holes 36 at both ends of each horizontal yoke and the tension clamp connecting metal fittings 21, respectively. The conductor-side yokes 6 and 40 of the insulator series are connected by a pair of tightening metal wheel mounting holes 22 and 22 at substantially conductor intervals, and a pair of fixing brackets 27 and 27 at the time of tightening to form an upper horizontal yoke. It is configured to provide a pair of fixing bracket mounting holes 23, 23 for connecting the unit 10 integrally. By connecting the upper horizontal yoke 10 and the conductor-side yokes 6 and 40 of the insulator series by a pair of fixing brackets 27 and 27 at the time of tightening, as shown in FIG. And the two yoke can be arranged in parallel.

Conductor side yoke 6, 40 of insulator series 2, 39
In the above, the upper and lower horizontal yokes 10, 12 are connected via the vertical yoke 8, but the vertical yoke 8 and the upper and lower horizontal yokes 10, 12 are integrated. The yoke (not shown) may be connected to the conductor-side yokes 6 and 40 via connection fittings. Further, an integral conductor-side yoke 44 (FIG. 8) in which the conductor-side yoke, the vertical yoke, and the upper and lower horizontal yoke are integrated may be used.

The yoke in which the vertical yoke and the upper and lower horizontal yoke are integrated and the integrated conductor side yoke 44 have a slackening wheel mounting hole 36 on each of the upper and lower sides thereof. The bolt-type tension clamps 28, 62 and 63 are connected via the adjustment bracket 16 and the tension clamp connection bracket 21, and the integral conductor side yoke 44 has an insulator connection hole at the same level as the insulator connection. A pair of tightening wire wheel attachment holes 22 are provided at substantially conductor intervals. In addition, the yoke in which the vertical yoke and the upper and lower horizontal yoke are integrated is provided with a fixing bracket mounting hole for integrally connecting the conductor side yoke of the insulator series with a pair of fixing brackets at the time of tightening. However, the fixing yoke mounting holes 23, 23 are not required for the integral conductor side yoke 44.

A multi-conductor tension insulator device is, for example, a 4-conductor 3
It is not limited to four conductors like the continuous balanced yoke type tension insulator device 1, four conductor two tension insulator device 38, 43, but it is a tension insulator device for even conductors having six or more conductors. Is also good.

The bolt type tension clamp 28 is provided with a tension clamp connection fitting mounting hole 71 at the insulator side end on the radial side of the clamp body 51, and is provided along the wire guide groove 50 on the jumper side of the clamp body 51. A predetermined number of presser fittings with tightening bolts including a presser fitting 54 for clamping the electric wire to the clamp body 51 and a bolt 56 with a nut 57 are provided, and a tightening wire wheel attaching portion 61 is protruded from the end on the jumper side. I have. The bolt-type tension clamp 62 includes a predetermined number of holding bolts with tightening bolts of the bolt-type tension clamp 28.
The clamp body 51 is separately provided on the span side and the jumper side of the clamp body 51.

In the bolt type tension clamp 63, a clamp body 64 is divided into a span side clamp body section 65 and a jumper side clamp body section 66, and both are detachably connected to each other. Is divided into two clamp main bodies 65 and 66, and a mounting bracket 72 having a tension clamp connecting metal fitting mounting hole 71 at the insulator side end of the span side clamp main body 65 via a connecting metal 69. Are rotatably connected, and a tightening wire wheel mounting bracket 76 is rotatably connected to the middle of the connecting bracket 69.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An overhead transmission line tightening method is shown in FIGS.
As shown in FIG. 6, a 4-conductor triple-balanced-yoke type tension insulator device 1, which is a multiconductor tension insulator device, is suspended from a supporting arm 24 of a power transmission tower. On the other hand, the worker has to use a two-bolt tension clamp 28, 28 removed from the four-conductor triple-balanced-yoke tension insulator device 1 for a wire-drawing wire pulley 34, which is suspended from the support arm 24. Temporarily assemble with the two electric wires 25, 25 in the vicinity, carry the two electric wires 25, 25 to the tension clamp mounting position P in a suspended state, and fix the jumper side of the bolt type tension clamps 28, 28 to the electric wires 25, 25. . Next, one end of each of the tensioning wheels 33, 33 is connected to a pair of tensioning wheel attachment holes 22 of the conductor side yoke 6 of the insulator row 2 of the four-conductor three-stroke balanced yoke type tension insulator device 1. , 22 and the other ends of the two bolt type tension clamps 28, 28 at the jumper side end thereof with the tensioning wheel mounting portions 61, 61 to connect the tensioning wheel wheels 33, 33.
, The four-conductor three-stroke balanced-yoke type tension insulator device 1 and the two electric wires 25 and 25 are pulled up.

Between the bolt-type tension clamp 28 pulled toward the insulator row 2 due to the shortening of the tension wire wheel 33 and the tension clamp connection fitting 21 at the tip of the four-conductor triple-balanced-yoke insulator device 1. As shown in FIG.
There are no other obstacles. For this reason, the bolt type tension clamp 28 and the tension clamp connection fitting 21 can be easily connected. The conductor-side yoke 6 in the 4-conductor triple-balanced-yoke type tension insulator device 1 is as follows.
The vertical yoke 8 is connected to the vertical yoke 8 via the right angle clevis 9, 9 via the right angle clevis 9, 9.
Because of the configuration in which the upper and lower conductors 12 are connected, the upper horizontal yoke 10 and the conductor-side yoke 6 are integrally connected by a pair of fixing brackets 27, 27 in order to specify the positional relationship between the upper and lower conductors.

When the connection between the bolt-type tension clamp 28 and the tension clamp connection fitting 21 is completed, the tensioning wheels 33, 33 are extended to reduce the wire tension to the tension clamp connection fitting 21.
Side, and release the connection with the bolt type tension clamps 28, 28, and tighten the tensioning wheel mounting hole 3 of the slackness adjusting brackets 16, 16.
When the connection is changed to 6, 36 (FIG. 3), the length is reduced again, the sag adjustment is performed by changing the length of the sag adjusting brackets 16, 16, and when it is finished, the sag adjusting brackets 16, 16 are extended to form the same. Remove from the yoke 6 on the conductor side. When the upper two lines are completed, the lower two lines are similarly tightened to adjust the conductor sag.

The bolt-type tension clamps 28 and 62 shown in FIGS. 9 to 12 are connected to the jumper-side presser fitting 54 and the tightening bolt 56 at a predetermined clamp mounting position P of the extended left and right electric wires 25 and 25. 25, the tension clamp mounting work on the electric wire 25 is simpler than that of the wedge-shaped retaining clamp. In the bolt-type tension clamp 62, since a predetermined number of presser fittings 54 with tightening bolts 56 are separately provided on the span side and the jumper side, only bolts on the jumper side are provided at the tension clamp mounting position P of the wire having poor scaffolding. After the bolt type tension clamp 62 is connected to the insulator string 39 side, the span side is bolted to the electric wire, thereby shortening the clamping work time of the tension clamp.

A bolt-type tension clamp 63 shown in FIGS. 13 and 14 forms a clamp main body 64 by detachably connecting a span side clamp main body 65 and a jumper side clamp main body 66 to form a clamp main body 64. Only the span side clamp body 65 is attached to the tension clamp attachment position P, and the jumper side clamp body 66 is attached to the span side clamp body 65 after tightening.
Are connected to each other, and the electric wire is clamped by the holding metal fitting 54 and the tightening bolt 56. Therefore, the weight of the bolt-type tension clamp carried to the tension clamp mounting position P can be reduced.

The tension clamp mounting position P marked on the electric wire 25 is determined in consideration of the actual wire length calculated by a calculation method determined in a factory or a site. For this reason, compared with the case where a cam-along is used, the sag adjustment range can be smaller, and it is not necessary to change the electric wire by the tension clamp for adjusting the sag.

[0023]

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. FIG. 1 to FIG. 6 are illustrations of a tensioning method for a four-conductor triple-balanced-yoke type tension insulator device 1.

The four-conductor three-balanced-yoke type tension insulator device 1 comprises a pair of triangular yokes 3 for connecting the conductor side of a three-conductor insulator 2 directly connected to a support arm 24 of a power transmission tower. 3 and a central yoke 5 connected to the apex of each triangular yoke 3 via links 4 and 4 to form a triple balance yoke on the conductor side of the insulator series 2.
An L-shaped vertical yoke 8 is connected to the central yoke 5 of the triple balance yoke 6 via a right-angle clevis 7, and the vertical yoke 8 has a right-angled upper portion. An upper horizontal yoke 10 is attached via a clevis 9 and a lower horizontal yoke 12 is attached below a long rectangular clevis 11 with a long length. A tension clamp connection fitting 21 is attached via the right-angle clevis link 15, the sag adjustment bracket 16, the right-angle clevis 17, and the right-angle clevis links 18, 19, and 20, and a bolt-type tension clamp (not shown) is connected to the end thereof. are doing. still,
The tension adjusting fitting 16 including the triangular link 37 and the pair of adjusting pieces 49 is provided with a tightening wire wheel mounting hole 36 at the middle apex of the triangular link 37, as shown in FIG. The adjusting bracket 16 is positioned so that the tightening wire wheel mounting hole 36 faces downward.
The lower sag adjusting bracket 16 is arranged such that the tensioning wheel attaching hole 36 is located upward.

The four conductor triple balanced yoke type tension insulator device 1 comprises a pair of triangular yokes 3, 3 of a triple balanced yoke 6.
A pair of tensioning wheel mounting holes 2 slightly wider than the wire spacing
2,22 are drilled. The central yoke 5 and the upper horizontal yoke 10 are connected to a pair of fixing fittings 27,
In order to be integrated at 27, a pair of fixing bracket mounting holes 23, 23 are respectively formed.

The tension wire wheel 33 is connected to the semi-wheel 30 connected to the triangular yoke 3 of the conductor side yoke 6 and the bolt type tension clamp 28 via a ring 97, a wire 99, and a U clevis 98. And a wire 35 wound around the semi-wheels 31 and 31 and pulled out from the semi-wheel 31 close to the bolt-type tension clamp 28 is provided on the support arm 24. Through a pulley 26 and wound around a winch (not shown).

The multi-conductor tensile insulator devices shown in FIGS. 7 and 8 are four-conductor two-unit tensile insulator devices 38 and 43. In the four-conductor two-piece tension insulator device 38 shown in FIG. 7, the conductor-side yoke of the insulator series is a conductor-side yoke 40 connecting the double-insulator series 39, and is perpendicular to the conductor-side yoke 40. An L-shaped vertical yoke 8 is connected via a clevis 41, an upper horizontal yoke 10 is connected to an upper portion of the vertical yoke 8 via a right angle clevis 9, and a lower portion of the vertical yoke 8 is provided. Has a long right angle clevis 1
1, a lower horizontal yoke 12 is connected to both ends of the upper and lower horizontal yokes 10, 12, like the tension insulator device 1 shown in FIG. Right Angle Clevis 17, Right Angle Clevis Link 18, 19, 2
0. The bolt type tension clamp 28 is connected via the tension clamp connection fitting 21. The conductor-side yoke 40 is provided with a pair of wire-tightening wheel mounting holes 22, 22, and both the conductor-side yoke 40 and the upper horizontal yoke 10 are connected to each other when the wire is tightened. In order to be integrated by the pair of fixing fittings 27, 27, a pair of fixing fitting mounting holes 23, 23 are respectively formed.

In the four-conductor double tension apparatus shown in FIG. 7, a vertical yoke 8 and upper and lower horizontal yokes 10, 12 are connected to each other.
Instead of connecting with the right-angle clevis 9 and the right-angle clevis 11, an integral yoke may be used. Also in this case, the conductor-side yoke 40 and the integral yoke are connected by a pair of fixing brackets at the time of tightening.

A four-conductor two-piece tension insulator device 43 shown in FIG.
The yoke on the conductor side of the double insulator series 39 is an integrated yoke 44.
This is different from the conductor-side yokes 6 and 40 of the multiconductor tensile insulator devices 1 and 38 shown in FIGS. 1 and 7. This integrated yoke 44 is composed of three horizontal yoke parts 45, 4
6 and 47 are integrated by a pair of vertical yoke portions 48, 48. In addition to connecting the double insulator string 39 to the middle horizontal yoke portion 46, a pair of tightening wires slightly wider than the conductor interval are provided. The vehicle wheel attachment holes 22 and 22 are formed. Right-angle clevis links 1 are provided at both ends of the upper and lower horizontal yoke portions 45 and 47, respectively.
5, sag adjustment bracket 16, right angle clevis 17, right angle clevis link 18, 19, 20, tension clamp connecting metal 21
The bolt-type tension clamp 28 is connected via the. However, in the lower horizontal yoke portion 47, the lower bolt-type tension clamp 28 projects by connecting the slack adjusting bracket 16 through the right-angle clevis link 15 longer than the upper right-angle clevis link 15. Is larger than the bolt-type tension clamp 28 at the top. The integrated yoke 44
In addition to the above-described configuration, a known integrated yoke can be applied.

The multi-conductor tension insulator device is not limited to the 4-conductor tension insulator device, but may be an even-number conductor or more conductor 6-conductor tension insulator device.

The bolt-type tension clamp 28 shown in FIG. 9 and FIG.
1 along both sides of the wire guide groove 52 on the jumper side.
3 and 53 are arranged side by side, and the holding metal
Is rotatably mounted, and the base of a tightening bolt 56 with a nut 57 that can be inserted into and removed from the forked portion 55 at the distal end of each presser fitting 54 is rotatably mounted on a support shaft. A base of a link 59 having a tension clamp connecting fitting mounting hole 71 at the tip is rotatably mounted on a mounting shaft 60 on the opposite side of the electric wire inlet 58, and further, on both sides of a jumper side end of the clamp body 51. Tension wire wheel attachment 6
1, 61 are protrudingly provided. As shown in FIGS. 1 and 2, a U clevis 97 is attached to the tensioning wheel & pinion mounting portion 61. It is connected to the clevis 98 via a wire 99.

The bolt-type tension clamp 62 shown in FIGS. 11 and 12 divides a predetermined number of presser fittings 54 and a tightening bolt 56 with a nut 57 each having the same configuration as that of the bolt-type tension clamp 28 into two parts. 9 and 10 in that the clamp body 51 is separately provided on the span side and the jumper side.

The bolt-type tension clamp 63 shown in FIGS. 13 and 14 divides the clamp body 64 into a span-side clamp body 65 and a jumper-side clamp body 66, and attaches and detaches the two with a plurality of bolts 67 and nuts 68. The base of a connecting metal fitting 69 consisting of a pair of mounting pieces is rotatably supported by the support shafts 70 at both ends of the forked portion 42 protruding from the insulator side end of the span side clamp body 65 at the point where it is freely connected. Mounting,
A parallel clevis 72 having a tension clamp connecting metal fitting mounting hole 71 is connected to a free end of the connecting metal fitting 69 with a support shaft 75, and a tightening wire wheel mounting metal fitting 76 is provided between the connecting metal fitting 69 with a support shaft 74. 11 and FIG.
2 is different from the bolt-type tension clamp 62 shown in FIG. It should be noted that the tensioning wire wheel mounting bracket 76 is shaped so as not to interfere with the tip of the connecting bracket 69.

The bolt type tension clamp 63 is
First, only the span side clamp main body 65 is fixed to the tension clamp mounting position P of the electric wire 25, and the tension wire wheel mounting bracket 7 is attached.
6 through a wire 99 and U clevis 98
When the semi-rotating wheel 31 is connected, the tension wire wheel 33 is shortened to connect the tension clamp connecting fitting 21 to the parallel clevis 72, and then the tension wire wheel 33 is extended to extend the tension clamp. When the wire tension is transferred to the connection fitting 21 side, the jumper-side clamp body 66 is connected to the span-side clamp body 65 with the bolt 67 and the nut 68, and the holding metal 54 and the bolt 5 are connected thereto.
6. The jumper wire is clamped by the nut 57.

The bolt type tension clamps 28, 62, 6
The holding member 54 of the third embodiment is formed by a known means other than a hinge type as shown in the embodiment by using a clamp body 51 and a clamp body 6.
5, 66.

[0036]

As described above, according to the present invention, the jumper-side end or span clamp of the double bolt type tension clamp clamped at the tension clamp mounting position of the two extended right and left electric wires. Since the tensioning wheel is operated by operating the tensioning wheel interposed between the insulator side end of the main body and both sides of the conductor side yoke of the insulator series, the tension insulator for multiconductor is used. When connecting the tension clamp connection fitting of the device to the bolt type tension clamp or the span side clamp body, there is no obstacle between them, so that both can be easily connected.

Further, the looseness adjustment after the connection of the bolt type tension clamp can be promptly performed by changing one end of the tensioning wheel from the bolt type tension clamp to the looseness adjusting bracket and shortening it.

Since the bolt-type tension clamp is clamped at the tension-clamp mounting position of the extended electric wire, it can be clamped easily and quickly as compared with the conventional wedge-type tension clamp. In addition, with a bolt-type tension clamp in which a predetermined number of clamps with tightening bolts are separately provided on the jumper side and span side of the clamp body, the clamping work time at the tension clamp position for wires with poor scaffolding can be shortened. , Work efficiency is improved. In the case of a bolt-type tension clamp in which the clamp body is divided into a span-side clamp body and a jumper-side clamp body, and each has a holding bracket and a tightening bolt, the bolt-type tension at the tension clamp position of the wire Since the clamp need only be attached to the span side clamp main body, the tension clamp can be easily transported in a suspended state.

[Brief description of the drawings]

FIG. 1 is a view for explaining a partially cut-off tightening method according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the tensioning method when FIG. 1 is viewed from the side.

FIG. 3 is a diagram for explaining conductor sag adjustment in a partially cutout according to the embodiment of the present invention.

FIG. 4 is a side view in which a multi-conductor tension insulator device before tensioning and a bolt-type tension clamp attached to an electric wire are connected by a tension wire wheel.

FIG. 5 is a side view showing a state in which the tensioning wheel is shortened to stretch the multi-conductor tension insulator device and the electric wire.

FIG. 6 is a side view of the tension insulator connecting device of the multiconductor tension insulator device and a bolt-type tension clamp connected to each other.

FIG. 7 is a partially cutaway plan view of the four-conductor two-piece tension insulator device during the tightening work.

FIG. 8 is a partially cutaway plan view of another four-conductor double-strength insulator device during a tightening work.

FIG. 9 is a side view of the bolt-type tension clamp according to the embodiment of the present invention.

FIG. 10 is a view as viewed in the direction of arrow A in FIG. 9;

FIG. 11 is a side view of a bolt-type tension clamp according to another embodiment of the present invention.

FIG. 12 is a partially cutaway plan view of the bolt-type tension clamp of FIG. 11;

FIG. 13 is a side view of a bolt-type tension clamp according to another embodiment of the present invention.

FIG. 14 is a partially cutaway plan view of the bolt-type tension clamp of FIG. 13;

FIG. 15 is a view for explaining a wedge-shaped retaining clamp mounting method in a conventional tensioning method.

FIG. 16 is a view for explaining a conventional tensioning method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 4 conductor triple-balanced-yoke type tension insulator device 6 Conductor side yoke 8 Vertical yoke 10 Horizontal yoke 12 Horizontal yoke 16 Sagging adjustment fitting 21 Tensile clamp connection fitting 22 Tension metal Car mounting hole 23 Fixing bracket mounting hole 24 Support arm 25 Electric wire 27 Fixing bracket 28 Bolt-type tension clamp 33 Tightening wire wheel 36 Tightening wire wheel mounting hole 38 4 Conductor 2 stations tension insulator device 39 Insulator link REFERENCE SIGNS LIST 40 conductor-side yoke 43 four-conductor double-strength insulator device 44 conductor-side yoke 45 horizontal yoke part 46 horizontal yoke part 47 horizontal yoke part 48 vertical yoke part 50 electric wire guide groove 51 Clamp body 52 Electric wire guide groove 54 Presser fitting 56 Tightening bolt 61 Tension wire wheel attaching part 62 Bolt type tension clamp 63 Bolt type tension clamp 64 Clamp body 65 Diameter side clamp body part 66 Jumper side clamp Body portion 69 connecting fitting 71 tension clamp connecting metal mounting holes 72 mounting bracket 76 緊線 mold wheel mounting bracket

Continuation of the front page (56) References JP-A-55-100009 (JP, A) JP-A-4-289711 (JP, A) JP-A-64-39205 (JP, A) JP-A-4-56016 (JP, A) JP-A-7-177627 (JP, A) JP-A-4-71314 (JP, A) JP-A-2-193510 (JP, A) JP-A-4-306516 (JP, A) 63-66015 (JP, U) Real opening 57-138222 (JP, U) Real opening 47-25192 (JP, U) Real opening Hei 3-80626 (JP, U) Real opening 61-141713 (JP, U U) Jikken 46-28116 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 1/04 H02G 7/02

Claims (12)

(57) [Claims] 1. A bolt-type tension clamp (28, 62) is fixed to a tension clamp mounting position (P) marked on each of two extended left and right electric wires (25) on its jumper side. A multi-conductor tension insulator device (1, 38, suspended in a support arm (24) of a transmission tower and lacking bolt type tension clamps (28, 62)).
43) and the left and right two electric wires (25) are connected to the conductor side yoke (6, 40, 44) of the insulator series of the multiconductor tension insulator device (1, 38, 43).
Of both tension type clamps (28, 28, 62, 62) and the jumper end of the both bolt type tension clamps (28, 28, 62, 62). Tension clamp
(28,28,62,62) to which the tension clamp connection fittings (21,21) of the multiconductor tension insulator device (1,38,43) are connected. Construction method. 2. A span-side clamp body (65) and a jumper-side clamp body (66) are provided at tension-clamp mounting positions (P) marked on each of the two extended left and right electric wires (25). ) Is detachably connected to only the span side clamp body (65) of the bolt type tension clamp (63), which is suspended from the supporting arm (24) of the power transmission tower and has a bolt type. Tension clamp (6
3) The multi-conductor tensile insulator device (1,38,43) and the extended left and right electric wires are connected to the multi-conductor tensile insulator device (1,38,4).
(3) The double-sided pulling wheels (33, 33) connected to both sides of the conductor side yoke (6, 40, 44) of the insulator series and the insulator side of the both span side clamp body (65, 65). 33) and shortened the length of the clamp body (65, 65) on both span side clamp bodies.
(1,38,43), and the jumper-side clamp body (66,66) is connected to the span-side clamp body (65,65). A method of tightening overhead power transmission lines. 3. An upper and lower horizontal yoke (10, 12) is connected to a conductor side yoke (6, 40) of an insulator series (2, 39) via a vertical yoke (8). At each end of the horizontal yoke, sag adjustment brackets (16),
The bolt type tension clamps (28, 62, 63) are connected via the tension clamp connection fittings (21), and the conductor side yoke (6, 4
(0) is a pair of tensioning wheel mounting holes (2
2,22) and a pair of fixing bracket mounting holes (23,23) for connecting the upper horizontal yoke (10) integrally with the pair of fixing brackets (27,27) when tightening. A tension insulator device for multiconductors characterized by the following. 4. An integrated yoke comprising upper and lower horizontal yoke portions and a pair of vertical yoke portions is connected to the conductor side yoke (6, 40) of the insulator series (2, 39). Bolt-type tension clamps (28, 62, 63) are connected to the upper and lower sides of this integrated yoke via a sag adjustment bracket (16) and a tension clamp connecting bracket (21), respectively, and the conductor-side yoke is connected. The yoke (6, 40) is provided with a pair of tightening wire wheel mounting holes (22, 22) at approximately conductor intervals, and the conductor-side yoke (6, 40) and the integrated yoke are A tension insulator device for a multiconductor, comprising: fixing metal fitting holes (23, 23) for integrally connecting with a pair of fixing metal fittings (27, 27) at the time of tightening. 5. A conductor-side yoke of an insulator string (39) in which three horizontal yoke portions (45, 46, 47) are integrated by a plurality of vertical yoke portions (48). A body yoke (44) with an intermediate horizontal yoke (4
6) A pair of tensioning wheel mounting holes (22,
22) and an insulator continuous mounting hole, and both upper and lower horizontal yoke parts (45,
47) bolt-type tension clamps (28, 62, 63) on both sides of each through a sag adjustment bracket (16) and tension clamp connection bracket (21)
A tension insulator device for multiconductors, characterized in that they are connected to each other. 6. A tensioning wheel mounting hole (3) in the sag adjusting bracket (16).
The tension insulator device for a multiconductor according to claim 3, wherein the device (6) is provided. 7. The bolt type tension clamp (28) according to claim 1, 3 or 4 is provided at the end of the clamp body (51) on the insulator side on the radial side of the clamp body (51). ), And a clamp (54) that clamps the electric wire to the clamp body (51) along the wire guide groove (50) on the jumper side of the clamp body (51) and a tightening bolt consisting of a tightening bolt (56) A predetermined number of presser fittings are provided, and a tightening wire wheel attaching part is provided at the end on the jumper side.
Bolt type tension clamp provided with (61). 8. The bolt-type tension clamp according to claim 7, wherein a predetermined number of presser fittings with tightening bolts are divided into two parts, and the bolt-type tension clamp is provided on the span side and the jumper side of the clamp body (51). Tension clamp. 9. The bolt-type tension clamp (63) according to claim 2, 3 or 4, detachably connects the span side clamp body (65) and the jumper side clamp body (66). A mounting bracket (72) having a tension clamp connecting bracket mounting hole (71) via a connecting bracket (69) at the insulator side end of the span side clamp body (65) of the clamp body (64) formed It is rotatably connected, and a tension wire wheel attachment (76) is provided in the middle of the connection fitting (69).
A bolt-type anti-bolt, which is rotatably connected and further divided into two parts, a clamp body with a predetermined number of tightening bolts and a clamp body (65) on the span side and a clamp body (66) on the jumper side. Tension clamp. 10. The multiconductor tensile insulator device according to claim 1, 2 or 3, wherein the multiconductor tensile insulator device is a four-conductor triple-balanced-yoke type tensile insulator device. 11. The multi-conductor tension insulator device according to claim 1, wherein the multi-conductor tension insulator device is a four-conductor two-unit tension insulator device. 12. A multiconductor tension insulator device according to claim 1 or 2, wherein the multiconductor of the multiconductor tension insulator device is an even number of conductors of 6 or more.