JP2952395B2 - Y suspension suspension insulator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension insulator device having a long suspension insulator sequence, and more particularly to a suspension insulator device installed at a place where the suspension insulator sequence is long and swings largely.

[0002]

2. Description of the Related Art The number of insulators in a series of insulators increases remarkably as the transmission voltage becomes extremely high. However, the number of insulators increases even when the insulators are installed in a salt damage area in order to increase the leakage distance of the insulators.
In areas with severe levels of pollution, the length of the insulator series becomes longer.

[0003] If the length of the insulator series becomes longer, the hanging length of the I-suspended insulator device becomes extremely long, so that the height of the steel tower becomes extremely high. Because of the need to increase the length of the arm, it is inevitable to increase the size of the tower. For this reason, conventionally, a V-suspended insulator device that requires a shorter suspension length than an I-suspended insulator device and that is less susceptible to lateral wind pressure is used.

Further, similarly to the V-suspended insulator device, the suspension length of the suspended device is shorter than that of the I-suspended insulator device, as shown in FIG. 10 (Japanese Patent Publication No. 38-25596).
Has also been proposed. In this embodiment, a quadruple insulator string 53 is formed by crossing a four-arm insulator 53 with the upper half V-shaped part 51 and the lower half inverted V-shaped part 52 twisted at right angles from the X-shaped crossing point as a base point.
4, the upper end of the upper half V-shaped part 51 is connected to a tower arm 55, and the electric wire 12 is suspended at the lower end of the lower half inverted V-shaped part 53 via a suspension clamp 56. It is.

[0005]

However, for example, FIG.
The one-sided insulator run length is 13.015 m at a V angle of 90 °,
In the case of a V-suspension insulator device having 62 insulators, the droop length of the suspension insulator device can be greatly reduced as compared with the I-suspension insulator device having the same number of insulators. .9 m, which is the required minimum distance 1.5 m between the installation point 3 for the arm of the steel tower and the installation point 5 for the suspension on the tower side of the arm.
Is added, the arm length becomes as large as 20.4 m. Therefore, even in the case of the V-suspension insulator device, it is unavoidable to increase the size of the tower, which increases the tower construction cost and increases the distance between the horizontal lines of the tower, that is, the width under the line, and the land compensation cost under the line increases. there were.

A twisted X-type insulator device shown in FIG.
No. 8-25596) is similar to the V-suspension insulator device.
The number of insulators is about twice as large as that of the I-suspended insulator device, and the structure is more complicated than that of the V-suspended insulator device and the I-suspended insulator device.

Further, when the V angle of the lower half inverted V-shaped portion 52 is set to be as large as, for example, 120 °, or the catenary angle between the younger one (power station side) and the older one (substation side) of the span is smaller. Where the insulator string tilts in the line direction due to the difference, the V angle of the lower half inverted V-shaped portion 52 is restricted, so that it is necessary to increase the device droop length.

That is, when the V angle is, for example, 120 °, the included angle of the base of the triangle formed by the lower half inverted V-shaped portion 52 and the electric wire 13 is as small as 30 °, and the catenary between the younger and the older is formed.
Since the insulator string is inclined in the line direction due to the difference in angle, considering the wire catenary angle and the angle (vibration angle) at the time of wire swing, the force line of the load acting on the suspension clamp 56 has a diagonal γ of the base included angle.
(FIG. 10), the insulator string 53 is loosened when it is removed upward, and the electric wire is compressed when it is removed downward. For this reason,
The V angle of the lower half inverted V-shaped portion 52 is reduced so that the line of force of the load acting on the suspension clamp 56 does not easily deviate from the diagonal γ, so that the device droop length becomes longer, which is a characteristic of the twisted X-type insulator device. The advantage that the device droop length is short is lost.

Further, in the twisted X-type insulator device, when the insulator device flows in the line direction due to uneven snow accumulation or a three-slit jump, the electric wire is connected to the leading insulator line of the lower half inverted V-shaped portion 52. Tension is applied, and the trailing insulator string becomes slack in a state where the tension is released (see FIG. 10). If such a slack occurs, radio interference will occur, and if the slack further increases, contact between the insulator and the wire, breakage of the insulator or flash accident will occur,
There is a risk that power transmission will be interrupted.

[0010] Therefore, the twisted X-type insulator device has problems in terms of manufacturing cost, device hanging length, power transmission supply, and the like, as compared with the V-suspended insulator device.

As a conventional device, in addition to the above-described suspension insulator device, there has been proposed a Y suspension suspension insulator device having a Y-shape when viewed from the line direction and an I-shape when viewed from the direction perpendicular to the line. However, this device has a V-angle of about 90 °, and has a longer droop length than the 90 ° V suspension insulator device, and is liable to sway, and furthermore, the upper half V-shaped portion which sags during the sway. Has not yet been put into practical use, for example, because the insulator may be damaged due to contact between the leeward insulator series and the insulator series of the lower half I-shaped part. Therefore, a jumper wire Y suspension device is provided at the lower end of the lower half I-shaped portion of the Y-shaped insulator series to prevent the lateral swing of the jumper wire (Japanese Utility Model Application No. 43-954).
No. 62) has been proposed. Also, when viewed from the track direction,
A jumper wire support device in which the lower ends of both insulator strings are connected by a connecting member so that the two sets of Y-shaped insulator strings having a V-shape are formed in an inverted V-shape when viewed from the direction perpendicular to the line (Japanese Patent Publication No. 49-21868).
No.) has also been proposed.

However, the Y-suspension insulator device and the jumper wire support device having the above-mentioned weight device have a complicated structure as compared with the V-suspension device, and the former has the same structure as the weight suspension device. Further, the height of the tower must be increased, and in the latter case, the same problem as in the twisted X-type insulator device occurs due to uneven snow deposition, a slip jump between one diameter and the like.

The present invention has been made in view of the above circumstances, and the number of insulators obtained by subtracting the number of insulators of one side of a V-shaped portion from the length and the total number of insulators of the present invention and the total number of insulators are different from those of the present invention. A 90 ° V suspension insulator device (hereinafter, referred to as a predetermined 90 ° V) having the same minimum required interval between the attachment point of the arm of the tower of the transmission tower and the attachment point of the suspension device on the base of the arm.
° V suspension insulator device) is shorter than the device droop length,
Moreover, it is an object of the present invention to provide a Y-suspended insulator device capable of reducing the total length of the arm and the distance between horizontal lines, that is, the width under the line, of a power transmission tower on which a predetermined 90 ° V suspended insulator device is vertically installed. Further, the device droop length is somewhat longer than the predetermined 90 ° V hanging length of the suspension insulator device, but the predetermined 90 ° V
An object of the present invention is to provide a Y-suspended insulator device capable of greatly reducing the overall arm length and the distance between horizontal lines of a transmission tower on which the suspended insulator device is vertically installed.

[0014]

In the Y-suspension device according to the present invention, the suspension device installed on a suspension tower or a jumper arm of a tension tower has a Y-shape when viewed from the line direction. The Y-suspension insulator device is I-shaped when viewed from a direction perpendicular to the track, and the interval between the attachment point of the suspension insulator device at the tip of the arm and the arm-attachment point of the tower body is limited to the applicable lateral vibration angle. θ
_The distance between the attachment point of the suspension insulator device at the tip of the arm and the attachment point of the arm of the tower when a predetermined abnormal insulation interval d ₁ is taken between the Y-suspension insulator device and the tower which takes ₁ is L _1. them if necessary minimum distance d ₂ of the arm-Y hanging suspension insulator apparatus length plus the attachment point interval d ₃ between the suspension insulator apparatus attachment point of arm-attachment point of the tower body and the cross-arm proximal and L Nitrile with the distance L ₁ less is ₂ is smaller than the distance L _1, said length L ₂ is the distance L ₁ or more and is characterized in that to take the length L _2.

Here, the applicable limit lateral vibration angle θ ₁ is generally the maximum lateral vibration angle at a wind speed of 40 m / s under high-temperature season design conditions, and is usually 70 °.

The Y-suspended insulator device according to the present invention has
The V angle of the upper half-V shaped portion of the suspended insulator string, taking the angle of the length L ₂ and the distance L ₁ is equal, hanging length is slightly higher than hanging length of the predetermined 90 ° V hanging suspension insulator apparatus It will be longer,
The overall length of the arm and the distance between the horizontal lines of the power transmission tower on which the predetermined 90 ° V suspension insulator device is suspended can be greatly reduced.

Further, the V angle of the upper half V-shaped portion of the Y hanging insulator string and the length L ₂ and the distance L ₁ is gradually increased from the angle equal, suspension insulator apparatus hanging length gradually shortened Therefore, the distance between the horizontal lines of the transmission tower and the total length of the arms are gradually increased, but as described above, the length L ₂ and the distance L
_At an angle where ₁ is equal to, the length of the device is slightly longer than the predetermined 90 ° V suspension insulator device, and the overall arm length and the distance between the horizontal lines are significantly shorter. Before the horizontal line distance and arm length of the power transmission tower on which the predetermined 90 ° V suspension insulator device is suspended are substantially the same as the horizontal line distance and arm length of the power transmission tower, the hanging length of the Y suspension insulator device. Becomes shorter than the predetermined hanging length of the 90 ° V suspension insulator device.

That is, the Y-suspension insulator device according to the present invention comprises:
The V-angle of the upper half V-shaped portion of the Y-suspension unit is determined from the angle at which the droop length of the Y-suspension device becomes equal to the predetermined droop length of the 90-degree V-suspension device. If the total length of the arm or the distance between the horizontal lines of the tower is set to be within a range of an angle equal to the total length of the arm or the distance between the horizontal lines of the transmission tower on which the predetermined 90 ° V suspension insulator device is installed, a predetermined 90 is possible. In comparison with the ° V suspension insulator device and the power transmission tower on which the device is suspended, any of the hanging length, the arm length, and the distance between the horizontal lines of the suspension insulator device can be shortened, and the power transmission tower can be downsized.

[0019] Conversely, the V angle of the upper half V-shaped portion of the Y hanging insulator string and the length L ₂ and the distance L ₁ is gradually reduced from an angle equal, Y hanging suspension insulator cross-arm Although the device mounting point interval becomes shorter, the arm length is at least as long as the aforementioned distance L.
Since the taken ₁ unchanged its length, will longer only the distance between suspension insulator apparatus hanging length and towers horizon. For this reason, the lower limit of the V angle of the Y-suspension insulator device is such that the ratio of the horizontal load to the vertical load is substantially 1 and a predetermined 90
It is desirable that the angle be around 90 °, at which the distance between horizontal lines can be shortened as compared with the ° V suspension insulator device.

The yoke portion connecting the upper half V-shaped portion and the lower half I-shaped portion of the Y-suspension insulator unit of the Y-suspended insulator device has an insulator connection on the upper half V-shaped portion on the tower side. Since the protrusion at the lower end of the insulator restricts the downward rotation of the insulator, even if the insulator string on the tower side is largely slackened, contact with the insulator string of the lower half I-shaped part can be avoided.

When the Y-suspension insulator device according to the present invention flows in the direction of the line, as shown in FIG. 9, the wire tension acts on the entire insulator string which is I-shaped when viewed from the direction perpendicular to the line. Therefore, the state is not such that the tension is released as in the case of the trailing insulator series of the twisted X-type insulator device shown in FIG.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a tower of a power transmission tower, 2 denotes an arm of the power transmission tower, and a Y suspension insulator device 6 having 62 insulators is vertically installed. In arm 2, 3 is tower 1
4 is a mounting point of the suspension insulator device at the tip of the arm bar (hereinafter referred to as a mounting point of the tip of the arm bar), and 5 is a mounting point of the suspension insulator device on the base side of the arm bar. required minimum distance d ₂ between the cross-arm attachment point 3 of the tower body 1 is 1.5 m.

The Y-suspension insulator device 6 comprises a suspension clamp 11 and an upper-half V-shaped part 7 attached to the lower end of an upper half V-shaped part 7, a lower half I-shaped part 8, and a lower half I-shaped part 8 of a Y-suspension insulator series 9. And lower half I-shaped part 8
And an inverted triangular yoke portion 10 for connecting the upper half V
The shape part 7 is attached to the arm metal 2 with a suspension device mounting bracket.

The upper half V-shaped part 7 has 42 insulators on one side and a length of 8190 mm on one side, and the lower half I-shaped part 8 has
The number of insulators is 20 and the insulator run length is 3900 mm (Fig. 3-
The length of the insulator string of the upper half V-shaped part and the lower half I-shaped part shown in FIG. 6 and the number of insulators are the same as those shown in FIG. 2). The yoke portion 10 shown in FIGS. 1 to 6 has an upper end width of 500 mm, and the attachment point of the lower half I-shaped portion 8 is set at the intersection of the extension lines of both insulator series of the upper half V-shaped portion 7. For this reason, the height of the yoke portion 10 is 175 mm in FIGS. 1 and 2, 144 mm in FIG. 3, and 117 m in FIG.
m, 210 mm in FIG. 5 and 250 mm in FIG.

As shown in FIG. 8, the insulator 16 at the lower end of the insulator row 15 on the tower body side of the upper half V-shaped portion 7 is attached to the yoke portion 10 shown in FIGS. , 1
The right-angle clevis 19, one-piece link 18,
In order to limit the downward rotation of the insulator 16 via the right-angle socket clevis 17, a protrusion 21 is provided to engage with the lower end of the groove bottom of the right-angle clevis 19 (note that the opposite end of the tower body). 20 'also has a projection 21'). This eliminates the contact between the insulator string 23 of the lower half I-shaped portion 8 and the leeward insulator string 15 which are aligned with the insulator string 22 on the windward side and have an applicable limit lateral vibration angle of 70 °. The protrusion 2
1 may be configured to engage with the downward side surface of the right angle clevis 19, for example. Further, the projection 21 may be separate from the yoke 10.

The Y at a V angle of 110 ° shown in FIGS. 1 and 2
The suspension insulator device 6 has an attachment point interval of 1550 to the arm 2.
0 mm, the suspension length of the suspension insulator device is 11370 mm, and the upper half of the suspension arm device mounting point 5 at the base side of the arm 2 is set at the required minimum distance 1500 mm from the arm mounting point 3 of the tower 1. When the upwind insulator string of the V-shaped section 7 and the insulator string of the lower half I-shaped section 8 are in a straight line and have an applicable limit lateral vibration angle of 70 °, insulation between the tower body 1 and at least a predetermined abnormality is obtained. Interval 1
350mm is secured. Therefore, the length of the arm 2 is Y
The distance can be set to 17000 mm, which is obtained by adding the required minimum interval of 1500 mm to the interval of the mounting points of the suspension insulator device.

Compared with the predetermined 90 ° V suspension insulator device shown in FIG. 7, the arm length is shorter by 8 m and the suspension length of the suspension device is longer by 0.73 m. Therefore, the overall length of the arm can be greatly reduced as compared with the increase in the suspension length of the suspension insulator device.
Further, since the distance between the horizontal lines is reduced by 4.6 m, the width under the line can be significantly reduced.

FIG. 3 shows a Y-suspension insulator device having a V angle of 120 °. In this embodiment, the spacing between the attachment points of the Y-suspension insulator device of the arm 2 is 16300 mm, and the length of the windward device when the applicable limit lateral swing angle is 70 ° is 16 mm shorter than that of the V angle 110 ° shown in FIG. 15359 mm.
For this reason, the arm length is 16 intervals between the attachment points of the Y-suspension insulator device.
17800 which added the necessary minimum interval 1500mm to 300mm
mm. This embodiment is shown in FIG.
Compared with the V-suspension device, the suspension length of the suspension device is 0.07 m longer, but the total length of the arm is 6 m and the distance between horizontal lines is 3.4 m shorter.

FIG. 4 shows a Y-suspension insulator device having a V angle of 130 °. In this embodiment, the spacing between the attachment points of the Y-suspension insulator device of the arm member 2 is 17000 mm, and the arm arm length is 18 mm.
500mm, the suspension length of the suspension insulator device is 10,000mm,
Compared to the predetermined 90 ° V suspension insulator device shown in FIG.
The overall length of the arm is 4.4m shorter, the distance between the horizontal lines is shorter by 2.5m, and the hanging length of the suspension insulator device is shorter by 0.64m.

FIG. 5 shows a Y-suspension insulator device having a V angle of 100 °. In this embodiment, the suspension length of the suspension insulator device is 12065 mm, and the distance between the attachment points of the Y suspension suspension device is 1 unit.
In comparison with the predetermined 90 ° V suspension insulator device shown in FIG. 7, the suspension length of the suspension insulator device is about 1.425 m longer than that of the predetermined 90 ° V suspension insulator device shown in FIG.
However, if the mounting point 5 of the suspension insulator device on the arm base is set to a position at a required minimum interval of 1500 mm from the arm mounting point 3,
Applicable limit Insulation distance d at the time of a predetermined abnormality between the windward device (device length 15396 mm) and the tower 1 when the lateral oscillating angle is 70 °
_{Since 1} cannot be taken, the arm length in this embodiment is set to 17000 mm which is the same as that shown in FIG.

FIG. 6 shows a Y-suspension insulator device having a V angle of 90 °. In this embodiment, the suspension length of the suspension insulator device is 12725 mm, and the distance between the attachment points of the Y suspension suspension insulator is 13
At 400 mm, the suspension length of the suspension insulator device is 2.085 m longer than that of the predetermined 90 ° V suspension insulator device shown in FIG. 7, but is 5.5 m shorter at the Y suspension suspension insulator attachment point interval. However, this also has the same arm length 1700 as that shown in FIG. 2 for the same reason as the one with a V angle of 100 ° (FIG. 5).
0mm.

Here, in the first embodiment described above (the number of insulators is 62, the number of insulators is 42 for the upper half V-shaped side, 20 for the lower half I-shaped side, and the V angle is 90 °, 100 °, 110
°, 120 °, 130 °) and the predetermined 90 ° shown in FIG.
Attachment interval of suspension insulator device to V suspension suspension insulator device (the number of insulators in one-sided insulators is 62), suspension length of suspension device, horizontal line distance (distance between shafts of both left and right suspension devices), and arm arm length (left and right) Table 1 shows the results of a comparative study of the length between the tips of both arms.

A comparison of the distance between the attachment points of the suspension insulator, the length of the suspension of the suspension, the distance between the horizontal lines, and the total length of the arm bar between another embodiment of the present invention and the corresponding 90 ° V suspension insulator. The examination results are shown in Tables 2, 3 and 4.

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

[0037]

[Table 4]

However, Table 2 shows the results of the second embodiment (when the number of insulators is 5).
7 pieces, the number of insulators is 39 pieces in the upper half of the V type, and the lower half I
Table 3 shows the third embodiment (52 insulators, the number of insulators is higher) in the case of the 18-shaped side and the predetermined 90 ° V suspension insulator device (the number of insulators in one-sided insulator series is 57). In the case of the half V-shaped side 36 pieces and the lower half I-shaped side 16 pieces) and the predetermined 90 ° V suspension insulator device (the number of insulators in one side of the insulator series is 52), Table 4
Is the same as the fourth embodiment (the number of insulators is 43, the number of insulators is 31 for the upper half V-shaped side, 12 for the lower half I-shaped side) and the predetermined 9
0 ° V suspension insulator device (the number of insulators on one side is 43
).

In Tables 1 to 4, the V angle 120
In each of the embodiments, the suspension length of the suspension device is longer by 0.06 m to 0.1 m, but the distance between the horizontal lines is 1.68, as compared with the corresponding 90 ° V suspension suspension device.
m to 3.4 m shorter and the total arm length is 2.6 m to 6 m shorter. In addition, in each of the embodiments having a V angle of 130 °, the suspension length of the suspension insulator device is shorter by 0.52 m to 0.64 m, and the distance between the horizontal lines is 0, compared to the corresponding predetermined 90 ° V suspension insulator device. 0.7m to 2.5m shorter, total arm length 1.2m
~ 4.4m shorter. In each of the embodiments of 120 ° and 130 °, the predetermined 90 ° V suspension insulator device has the suspension length of the suspension insulator, the distance between the horizontal lines, and the shortening ratio with respect to the total arm length, the horizontal line distance of the fourth embodiment. And the length is almost the same except for the arm length, and the shortened length increases as the number of insulators increases, that is,
The longer the insulator run length, the larger.

The total length of the arm bar is the shortest in each embodiment in which the V angle is 90 ° to 110 °. Comparing this with a predetermined 90 ° V suspension insulator device, the first embodiment in which the number of insulators is the maximum is 8 m, and the fourth embodiment in which the number of insulators is the minimum is 4.
2m shorter. In the first to fourth embodiments in which the V angle is 110 °, the distance between the horizontal lines can be reduced by 2.4 m to 4.6 m compared to the predetermined 90 ° V suspension insulator device, and the suspension length of the suspension insulator device is Conversely, it is 0.64 m to 0.77 m longer. Then, the predetermined 90 ° V suspension insulator device has a hanging length of the suspension insulator device, a distance between horizontal lines, and 90 ° relative to the total arm length.
The reduction ratio of each of the embodiments of ° and 110 ° is almost the same in the first to third embodiments, whereas the apparatus droop length in the fourth embodiment is almost the same as that of the first to third embodiments. However, the distance between the horizontal lines and the overall length of the arm are slightly worse.

[0041]

As described above, according to the present invention, according to the third aspect of the present invention, the suspension length of the suspension insulator device is slightly or somewhat longer than that of the predetermined 90 ° V suspension insulator device. Since the total length and the distance between the horizontal lines, especially the total length of the arm bar, can be greatly reduced, the size of the DC power transmission tower having a single-stage arm bar for hanging the suspension insulator device can be achieved. In addition, according to the configuration of the fourth aspect, the hanging length of the suspension insulator device, the total length of the arm bar, and the distance between the horizontal lines can be set to a predetermined value.
Since the length of the suspension insulator device can be further shortened as compared with the 0 ° V suspension insulator device, it is possible to reduce the size of the AC power transmission tower in which the arms for vertically suspending the suspension insulator device are multistage vertically. Therefore, it is an invention which has a great economic effect when implemented in a transmission tower in an ultra-high voltage transmission area where the number of insulators is increased, a salt damage area is severe, etc., which can reduce a tower construction cost, a land compensation cost under a line, etc. .

[Brief description of the drawings]

FIG. 1 is a view for explaining attachment to an arm of an embodiment of the present invention.

FIG. 2 is a view for explaining attachment to a ferrule of an embodiment in which a V angle of a Y-suspension insulator series is 110 °.

FIG. 3 is a view for explaining attachment to the arm in the embodiment in which the V angle of the Y-suspension insulator is 120 °.

FIG. 4 is a view for explaining attachment to the arm in the embodiment in which the V angle of the Y-suspension insulator is 130 °.

FIG. 5 is a view for explaining attachment to the arm in the embodiment in which the V angle of the Y suspension insulator is 100 °.

FIG. 6 is a view for explaining attachment to the arm in the embodiment in which the V angle of the Y-suspension insulator is 90 °.

FIG. 7 is a diagram for explaining attachment of a conventional 90 ° V suspension insulator device to a arm.

FIG. 8 is a view for explaining a function of preventing a leeward side insulator from hanging down by a yoke part of the embodiment.

FIG. 9 is a side view of the embodiment inclined in the line direction.

FIG. 10 is a side view of the twisted X-shaped insulator device inclined in the line direction.

[Description of sign]

DESCRIPTION OF SYMBOLS 1 Tower body 2 Arm 3 Arm attachment point of tower 4 Attachment point of suspension insulator device at arm tip 5 Attachment point of suspension insulator device at arm base 6 Y Suspension insulator device 7 Upper half V-shaped part 8 Lower half I-unit 9 Y suspended insulator string 10 Yo - click portion 21 protrusion theta ₁ A limitation horizontal oscillation angle d ₁ predetermined abnormal insulation gap d ₂ required minimum distance d ₃ Y hanging suspension insulator apparatus attachment point interval

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Shikata 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Co., Inc. (72) Inventor Toru Sakai 3-2-23 Nakanoshima, Kita-ku, Osaka Kansai Electric Power Inside (72) Inventor Yoshihisa Maeda 13-1, Isojima Minamicho, Hirakata City, Osaka Prefecture Inside Nippon Katani Co., Ltd. (72) Inventor Akihiro Katayama 13-1, Isojima Minamimachi, Hirakata City, Osaka Prefecture Nippon Katan Co., Ltd. ( 72) Inventor Hiroki Sakamoto 13-1 Isojima Minamicho, Hirakata City, Osaka Prefecture Nippon Katan Co., Ltd. (56) References JP-A-5-282946 (JP, A) Japanese Patent Publication No. 38-25596 (JP, B1) ( 58) Field surveyed (Int. Cl. ⁶ , DB name) H01B 17/00-17/54

Claims (5)

(57) [Claims] 1. A suspension insulator device suspended from an arm (2) of a power transmission tower, the suspension insulator device having a Y-shape when viewed from the track direction and an I-shape when viewed from a direction perpendicular to the track. The mounting point of the suspension insulator at the tip of the arm (4) and the mounting point of the arm (3) on the tower (1).
The spacing, predetermined abnormal insulation gap between the take applicable limit lateral oscillation angle (theta ₁₎ Y hanging suspension insulator apparatus and tower body ₍₁₎ (d 1)
If the distance between the suspension insulator mounting point (4) at the tip of the arm and the arm (3) of the tower (1) is (L ₁ ),
At the minimum distance (d ₂ ) between the arm attachment point (3) of the tower (1) and the suspension insulator attachment point (5) on the base of the arm, the Y-suspension insulator of the arm (2) Length (L ₃ ) including the attachment point interval (d ₃ )
₂ ) is smaller than the distance (L ₁ ) and is at least the distance (L ₁ ), and the length (L ₂ ) is equal to the distance (L ₁ ).
In the above, the length (L ₂ ) is set to the length (L ₂ ). 2. An insulator at a lower end of an insulator string on the tower side of the upper half V-shaped part, on the tower side of the yoke part connecting the upper half V-shaped part and the lower half I-shaped part of the Y suspension insulator series. 2. The Y-suspended insulator device according to claim 1, further comprising a projection for restricting downward rotation. 3. The V-angle of the upper half V-shaped portion of the Y-suspension insulator is set to 90.
3. The Y-suspended insulator device according to claim ₁ , wherein the angle (L ₂ ) and the interval (L ₁ ) are set to be equal to each other from around °. 4. The V angle of the upper half V-shaped portion of the Y suspension insulator
From the angle at which the hanging length of the suspended insulator device is equal to the predetermined 90 ° V hanging length of the suspended insulator device, a 90 ° V suspended insulator device having a predetermined length of the arm of the power transmission tower or the predetermined distance between the horizontal lines is provided. The Y according to claim 1 or 2, wherein the angle is set within an angle equal to the total length of the arm of the transmission tower or the distance between the horizontal lines.
Suspension insulator device. 5. The Y-suspended insulator device according to claim 1, wherein the transmission tower is a suspension tower or a jumper part of a tension tower.