JPH0739053A - Jumper device for overhead power transmission line having horizontal angle - Google Patents

Abstract

PURPOSE:To make it possible to retain a plurality of rigid jumper conductors in a horizontal state at the same height position. CONSTITUTION:A jumper line 10B is suspended by V-suspension method from a steel tower arm through an insulator string 13 and suspension fittings 14B. A rigid jumper conductor 11 is retained by rigid jumper conductor retaining fittings 15B. One end of a flexible jumper conductor is connected to the main line of power transmission line, and the other end of the flexible jumper conductor is connected to both the ends of the rigid jumper conductor 11. The rigid jumper conductor retaining fittings 15B is coupled with an angle attached to suspending fittings 14B so as to allow rotation as one united body in right-left direction. Component of a tensile force in the flexible jumper conductor acts in such a manner that a slant of the rigid jumper conductor 11 at the side close to the steel tower arm tip will lower said conductor 11 downward and the suspension fittings 14B is slanted. Since the rigid jumper conductor retaining fittings 15B is slanted relative to the suspension fittings 14B, a plurality of rigid jumper conductors 11 in this state are held in a horizontal state at the same height position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper device for an overhead transmission line having a horizontal angle.

[0002]

7 to 9 show an outline of a jumper device for an overhead transmission line having a horizontal angle, which is common to the prior art and the present invention.
In these drawings, reference numeral 1 is a tension-resistant steel tower, reference numeral 2 is its tower body, reference numeral 3 is a steel tower arm, and reference numeral 4 is a transmission line main line. The transmission line main line 4 is retained near the tip end side of the steel tower arm 3 via the yokes 6, 7 and the tensile strength link 8 and the like. The jumper wire 10 includes two rigid jumper conductors 11 made of an aluminum pipe or the like extending substantially horizontally below the steel tower arm 3, and a power transmission line main line 4 connecting an end of the rigid jumper conductor 11 and the power transmission line main line 4. As shown in FIG. 9, the two rigid jumper conductors 11 are composed of a flexible jumper conductor 12 formed of a stranded wire similar to the above, and the two rigid jumper conductors 11 are V-shaped from two positions apart in the arm longitudinal direction of the steel tower arm 3. Rigid jumper conductor holding metal fittings 15 suspended on the metal fittings 14 connected to the lower ends of the two Gaishi reams 13 suspended on the
The steel tower arms are held at intervals in the longitudinal direction.

The jumper device 10 shown in the figure is provided on the steel tower arm 3 outside the horizontal angle of the steel tower arms extending from the tower body 2 to the left and right (up and down direction in FIG. 5). Therefore, the flexible jumper conductor 12 connected to the transmission line main line 4
In order to prevent the rigid jumper conductor 11 from being attracted to the tower body 2 side due to the component force of the tension, the suspension is suspended by the V suspension system by the Gaishi ream 13 as shown in the figure. Further, the tension tower 1 in the illustrated example is a transmission tower of 1 million volt class, and its tower arm 3 is a large one whose arm length extends up to, for example, about 20 m, and the arm is required to have sufficient rigidity. It has a structure called a box arm having a box shape over the entire length in the longitudinal direction.

The hanging metal fitting 14 in the above jumper device
FIG. 10 shows a conventional configuration of the rigid jumper conductor holding metal fitting 15 portion. It should be noted that the conventional jumper wire is designated by reference numeral 10.
A, the hanging metal fitting is shown by reference numeral 14A, and the rigid jumper conductor holding metal fitting is shown by reference numeral 15A. In FIG. 10, the hanging metal fitting 14A
Is a connecting plate 20 to which the lower ends of the left and right insulators 13 are connected.
The frame body 22 having a groove shape when viewed from the front is fixed to the bracket 21 fixed to the connecting plate 20 with the bolt 23,
A counterweight 24 is housed in the frame 22, and a pin 26 is attached to a plate-like joint 25 fixed to the lower surface of the frame 22.
The U-shaped connecting member 27 is connected via the, and a plate-like joint 28 is fixed to the lower surface of the connecting member 27.

On the other hand, a rigid jumper conductor holding metal fitting 15A
The upper member 30 and the lower member 31 have a two-part structure in which two rigid jumper conductors 11 are sandwiched in the longitudinal direction of the steel tower arm 3 with a space therebetween, and a bolt 32 tightens both members 30, 31. The rigid jumper conductor 11 is fixedly held and the plate-like joint 33, which is a suspended portion, is vertically fixed at the central position of the upper surface of the upper member 30, and the connecting member is connected to the joint 33 via the pin 34. 35 are connected. Then, the joint 28 of the connecting member 27 on the hanging metal fitting 14A side and the connecting member 35 on the rigid jumper conductor holding metal fitting 15A side are connected by a pin 39. The axial direction of the pin 39 is the same as the longitudinal direction of the rigid jumper conductor 11, and therefore the rigid jumper conductor holding fitting 15A is
It is rotatable left and right around the pin 39.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
By the rigid jumper conductor 11 in the jumper wire 10A
The mechanism for suspending is a link structure for connecting a pin-connected connecting member 27 on the hanging metal fitting 14A side and a similar pin-connected connecting member 35 on the rigid jumper conductor holding metal fitting 15A side via a pin 39, It has a single-point suspension structure, which is a rigid jumper conductor 11 when cross winds act.
This is intended to prevent the stress concentration from occurring by swinging around the pin 39. However, in such a configuration, when the horizontal angle is large, the rigid jumper conductor 11 is moved to the tip end side of the steel tower arm (see FIG. 10) due to the component of the tension of the flexible jumper conductor 12 connected to the transmission line main line 4. A problem occurs that the left side in FIG. 10 is inclined so that it is lowered. And
In this case, since the left and right rigid jumper conductors 11 have different height positions, it is difficult to match the DIP (drooping degree) of each flexible jumper conductor 12 and workability is deteriorated. It was Further, if a difference in height occurs between the left and right rigid jumper conductors 11, electric charges are likely to be collected in the rigid jumper conductors 11 (the left one in FIG. 10) closer to the ground side, which causes a problem that corona characteristics are deteriorated. It will be. In addition, the appearance is unstable, which is unfavorable in terms of aesthetics.

The present invention has been made to solve the above-mentioned conventional drawbacks, and is a novel jumper device for an overhead transmission line having a horizontal angle, which can prevent the rigid jumper conductor from tilting and keep it horizontal. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a rigid jumper conductor holding metal fitting for holding a plurality of rigid jumper conductors at intervals in the tower tower arm longitudinal direction. In a jumper device for an overhead transmission line with a horizontal angle, which is hung from two positions separated from each other in a V shape by hanging fittings connected to the lower ends of two Gaishi reams, the hanging fittings And the rigid jumper conductor holding bracket so that they rotate together at least on a vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor, and the width direction central axis M of the jumper conductor holding bracket is the width of the hanging bracket. It is characterized in that they are connected so as to be inclined with respect to the direction central axis L.

[0009]

In the above structure, the component component of the tension of the flexible jumper conductor connected to the main line of the power transmission line acts on the rigid jumper conductor suspended by the V suspension method on the steel tower arm via the suspension fitting. This component force acts to lower down one of the rigid jumper conductors on the tip side of the tower arm among the plurality of rigid jumper conductors held at intervals in the longitudinal direction of the tower arm by the rigid jumper conductor holding metal fittings. Here, since the rigid jumper conductor holding metal fitting is connected to the hanging metal fitting so as to rotate integrally with at least a vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor, the rigid metal jumper conductor rotates together with the hanging metal fitting and the hanging metal fitting tilts. To do. However, since the rigid jumper conductor holding metal fittings are connected to the hanging metal fittings at an angle, the hanging metal fittings are inclined and the rigid jumper conductor holding metal fittings are kept horizontal, that is, the left and right rigid jumper material. The conductors are kept horizontal at the same height without tilting.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above with reference to FIGS. 7 to 9, the jumper device of the present invention is applied to a jumper wire 10 having a horizontal angle, and a plurality of rigid jumper conductors 11 are attached to the tower arm length. Rigid jumper conductor holding metal fittings 15, which are held at intervals in the direction, are connected to the lower ends of two Gaishi reams 13 suspended in a V shape from two positions apart from each other in the longitudinal direction of the tower arm 3. It is configured to be suspended by the suspended metal fittings 14. A detailed description thereof will be omitted. 1 to 4 show an embodiment of a jumper device for an overhead transmission line having a horizontal angle according to the present invention. In addition, the jumper wire in the jumper device of one embodiment of the present invention is denoted by reference numeral 10.
Reference numeral 14B denotes a hanging metal fitting, and reference numeral 15B denotes a rigid jumper conductor holding metal fitting.

The hanging metal fittings 14B are the left and right members 1
3 has a connecting plate 20 for connecting the lower ends of the
A frame body 22 having a groove shape when viewed from the front of FIG. 1 is fixed to a bracket 21 fixed to the housing with a bolt 23, and a counterweight 24 is accommodated in the frame body 22. The plate-like joints 25 fixed at two positions in the horizontal direction (left and right in FIG. 1) are respectively connected with the connecting members 47 via the pins 26, and the plate-like joints 48 are connected to both the connecting members 47.
Both ends of are fixed with bolts 49.

On the other hand, the rigid jumper conductor holding fitting 15B
Is a two-part structure in which the upper member 30 and the lower member 31 sandwich two rigid jumper conductors 11 made of an aluminum pipe or the like at intervals in the longitudinal direction of the tower arm 3, and the bolts 32 are used to mount both members 30, 31 is clamped and fixed to firmly hold the two rigid jumper conductors 11, and the plate-like joint 53 is vertically fixed to the upper surface of the upper member 30.

The joint 4 on the side of the hanging metal fitting 14B
The central portion of 8 and the joint 53 on the side of the rigid jumper conductor holding fitting 15B are overlapped with each other, and by the first connecting pin 54 and the second connecting pin 55 that are spaced in the longitudinal direction of the tower arm (left and right in FIG. 1). The joints 48 and 53 are integrally joined, and thus the hanging metal fitting 14B and the rigid jumper conductor holding metal fitting 15B are rotated together in a vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor 11.
In addition, the width direction central axis M of the jumper conductor holding bracket 15B
Are connected so as to be inclined with respect to the widthwise central axis L of the hanging metal fitting 14B. The details of this joint will be described with reference to FIGS. 3 and 4.
Each of the joints 48 has one connecting hole 48a and 53a through which the second connecting pin 54 passes, but one joint 48 has two connecting holes with a slight gap in the longitudinal direction of the tower arm. The joint 53 has holes 48b and 48c, and the other joint 53 has a position corresponding to the connecting hole 48b (a position on the same circumference with the connecting hole 53a as the center and the distance between the two connecting holes 48a and 48b as a radius). Connection hole 53b,
53c and connecting holes 53d and 53e at positions corresponding to the connecting hole 48c, and the connecting hole 53b is in the horizontal direction passing through the connecting hole 53a, and the other connecting hole 53
c, 53d, and 53e are in the direction in which the inclination is sequentially changed by the angle α. In addition, in order to provide a plurality of connection holes with different angles in a narrow space, the above-mentioned opening method is used. In addition, the selection of the connection holes 53b, 53c, 53d, and 53e through which the second connection pin 55 of the joint 53 is passed, that is, the inclination angle between the joint 48 on the hanging metal fitting 14B side and the joint 53 on the rigid jumper conductor holding metal fitting 15B side is set. Is performed so that the plurality of rigid jumpers 11 are actually horizontal in consideration of various conditions.

Further, as shown in FIGS. 5 and 6, a stopper mechanism 40 which is a stopper block is provided on the connecting plate 20 of the hanging fitting 14B. The stopper block 40 has a connecting hole 20 to which a connecting metal fitting 41 at the lower end of the Gaishi ream 13 on the side close to the tip of the steel tower arm 3 (left side in FIGS. 1 and 5) is connected.
It is fixed by welding in the vicinity of a, and the suspension metal fitting 14B is shown in FIGS.
When it is rotated counterclockwise by a certain angle, the connecting bracket 4
The hanging metal fitting 14B is regulated so as not to rotate any more when it hits 1.

In the jumper device having the above-mentioned structure, the rigid jumper conductor 11 is hung from the steel tower arm 3 by the V-suspension method via the two Gaishi stations 13 and the hanging metal fittings 14B.
Is a flexible jumper conductor 1 connected to the transmission line main line 4.
A component of tension of 2 acts. This component force is generated by the rigid jumper conductor holding metal fittings 15B with a distance in the longitudinal direction of the tower arm (left and right direction in FIG. 1) and is held at the tip end side of the steel tower arm (left side in FIG. 1) of the two rigid jumper conductors 11. )
The ones close to will work downward. Here, since the rigid jumper conductor holding fitting 15B is connected to the hanging fitting 14B so as to rotate integrally with at least the vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor 11, the hanging fitting 1
4B, the hanging metal fitting 14B is inclined toward the tower body 2 side (right side in FIG. 1) (the lower portion is inclined toward the tower body 2 side) as shown in FIG. However, since the rigid jumper conductor holding fitting 15B is connected to the hanging fitting 14B at an angle, the rigid jumper conductor holding fitting 15B is horizontal when the hanging fitting 14B is inclined. That is, the two right and left rigid jumper conductors 11 are aligned in the height position and kept in the horizontal state.

The stopper mechanism (block) 4
0 prevents the hanging metal fitting 14B from being pulled by the component of the tension of the flexible jumper conductor 12 and tilting beyond the allowable limit. Therefore, even if the set inclination angle of the rigid jumper conductor holding fitting 15B with respect to the hanging fitting 14B is not so accurate in terms of force balance, the two rigid jumper conductors 11 are reliably kept horizontal at the same height position. be able to.

The plurality of connecting holes provided in the joint for enabling the angle adjustment are the connecting holes 53b, 53 of the embodiment.
It is not limited to the case where the rigid jumper conductor holding metal fitting 15B side joint 53 like c, 53d and 53e is used, and the rigid jumper conductor holding metal fitting 15B side joint 48 can be opened. Further, the connecting structure of the joint 48 on the hanging metal fitting 14B side and the joint 53 on the rigid jumper conductor holding metal fitting 15B side is limited to the two-point hanging connecting structure by the first and second connecting pins 54, 55 as in the embodiment. Not done. Further, the tilt angle may not necessarily be adjustable. In short, the hanging metal fitting 14B and the rigid jumper conductor holding metal fitting 15B are rotated at least on the vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor 11 and the center of the rigid jumper conductor holding metal fitting 15B in the width direction. It suffices that the axis M is connected so as to incline at a predetermined angle with respect to the widthwise central axis L of the hanging fitting 14B.

[0018]

According to the present invention, the hanging metal fitting 14B and the rigid jumper conductor holding metal fitting 15B are rotated integrally with each other at least on a vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor 11. Since the rigid jumper conductor holding fitting 15B is connected so that the width-direction central axis M of the rigid jumper conductor holding fitting 15B is inclined with respect to the width-direction central axis L of the hanging fitting 14B, the hanging fitting is made by the component force of the tension of the flexible jumper conductor 12. Rigid jumper conductor holding bracket 15 when 14B is tilted
Since B is horizontal, it has become possible to align a plurality of rigid jumper conductors 11 at the same height position and keep them horizontal. This facilitates the work of aligning the DIP (drooping degree) of the flexible jumper conductors 12 when the jumper device is installed, and the workability is improved. Furthermore, the corona characteristics are improved by aligning the height positions of the plurality of rigid jumper conductors 11.

Further, the appearance is stable and the appearance is improved.
Further, since the plurality of rigid jumper conductors 11 are kept horizontal at the same height position, the wind-receiving area for crosswind is reduced, and the lateral shake motion is suppressed accordingly.

According to the second or third aspect, the rigid jumper conductor holding fitting 15B is connected to the hanging fitting 14B by a two-point hanging structure.
It is easy to adjust the inclination angle of B with respect to the hanging fitting 14B.

According to the fourth aspect, since the stopper mechanism 40 for restricting the relative rotation between the connecting fitting 41 at the lower end of the insulator 13 and the hanging fitting 14B is provided, the hanging fitting 14B is provided.
Is prevented from tilting beyond the allowable limit, and the rigid jumper conductor 11 can be reliably held in the horizontal position at the same height position.

[Brief description of drawings]

FIG. 1 is a front view showing a suspension metal fitting and a rigid jumper conductor holding metal fitting part in a jumper device for an overhead transmission line having a horizontal angle according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a front view showing two joints 48 and 53 in FIG. 1 separated from each other.

FIG. 4 is a sectional view taken along line CC in FIG.

5 is a partially enlarged view of the hanging metal fitting in FIG. 1. FIG.

6 is a sectional view taken along line BB in FIG.

FIG. 7 is a plan view showing a general outline of a jumper device for an overhead transmission line having a horizontal angle, which is a view common to the conventional art and the present invention.

FIG. 8 is a side view taken along arrow A in FIG.

FIG. 9 is a right front view with a part omitted in FIG. 7.

FIG. 10 is a front view corresponding to FIG. 1, showing a suspending metal fitting and a rigid jumper conductor holding metal fitting portion in a conventional jumper device for an overhead transmission line having a horizontal angle.

[Explanation of symbols]

 1 tension-resistant steel tower 2 tower body 3 steel tower arm 4 transmission line main line 10,10B jumper wire 11 rigid jumper conductor 12 flexible jumper conductor 13 GUISHI link 14,14B suspension metal fitting 15,15B rigid jumper conductor holding metal fitting 20 connecting plate 22 frame Body 40 Stopper mechanism (stopper block) 41 Coupling metal fitting 47 Coupling member 48 Plate joint 48a Coupling hole 48b, 48c Coupling hole 53 Plate joint 53a Coupling hole 53b, 53c, 53d, 53e Coupling hole 54 First coupling pin 55 Second connection pin L Width center axis of hanging metal fitting M Width center axis of jumper conductor holding metal fitting

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[Procedure amendment]

[Submission date] August 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

The jumper wire 10 shown in the figure is provided on the steel tower arm 3 outside the horizontal angle of the steel tower arms extending from the tower body 2 to the left and right (up and down direction in FIG. 7). Therefore, the flexible jumper conductor 12 connected to the transmission line main line 4
In order to prevent the rigid jumper conductor 11 from being attracted to the tower body 2 side due to the component force of the tension, the suspension is suspended by the V suspension system by the Gaishi ream 13 as shown in the figure. Further, the tension tower 1 in the illustrated example is a transmission tower of 1 million volt class, and its tower arm 3 is a large one whose arm length extends up to, for example, about 20 m, and the arm is required to have sufficient rigidity. It has a structure called a box arm having a box shape over the entire length in the longitudinal direction.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

Claims (4)

[Claims] 1. A rigid jumper conductor holding fitting (15B), which holds a plurality of rigid jumper conductors (11) at intervals in the lengthwise direction of the steel tower arm, is separated in the longitudinal direction of the steel tower arm (3). A jumper device for an overhead power transmission line with a horizontal angle, which is suspended by hanging metal fittings (14B) connected to the lower ends of two Gaishi reams (13) suspended from two positions in a V-shape, The hanging metal fitting (14B) and the rigid jumper conductor holding metal fitting (15B) are rotated together at least on a vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor.
In addition, the jumper conductor holding fitting (15B) is connected so that the width direction central axis line M is inclined with respect to the width direction central axis line L of the hanging fitting (14B). Jumper device. 2. The hanging metal fitting (14B) and the rigid jumper conductor holding metal fitting (15B) are connected by two points having an interval in the longitudinal direction of the tower arm.
Jumper device for overhead power lines with horizontal angles as described. 3. The lower portion of the hanging metal fitting (14B) and at least a rigid jumper conductor (1)
1) A plate-like joint (48) adapted to rotate integrally with the hanging metal fitting (14B) on the vertical plane orthogonal to the longitudinal direction of 1), and the rigid jumper conductor holding metal fitting (15B).
A plate-like joint (53) that is provided on the upper part of the rigid jumper conductor (11) and is connected so as to rotate integrally with the rigid jumper conductor retaining bracket (15B) at least on a vertical plane orthogonal to the longitudinal direction of the rigid jumper conductor (11). ) Are partially overlapped with each other, and the two joints (48), (53) are connected to each other by a first connecting pin (5) having a space in the longitudinal direction of the tower arm.
4) and the second connecting pin (55) are joined to each other, and at least one of the two joints (48) and (53) is provided with a connecting hole through which the second connecting pin (55) is inserted. A plurality of connecting holes (5) each having a different angle with respect to the horizontal line passing through the first connecting pin (54).
3b), (53c), (53d), (53e) are provided, The jumper apparatus of the overhead transmission line with a horizontal angle of Claim 2 characterized by the above-mentioned. 4. A stopper mechanism (4) for restricting relative rotation between a connecting fitting (41) at the lower end of each of said insulators (13) and said hanging fitting (14B) to which this connecting fitting (41) is connected. 40) The jumper device for an overhead power transmission line with a horizontal angle according to claim 1, wherein the jumper device has a horizontal angle.