JP3705480B2 - Pipe-type jumper device for overhead power transmission lines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe-type jumper device for an overhead power transmission line, and particularly has a feature in that a weight (weight) is added to a jumper pipe portion in order to suppress a lateral vibration of the jumper device due to wind.
[0002]
[Prior art]
In an overhead power transmission line, a jumper pipe made of aluminum pipes, etc., is arranged in a substantially horizontal state below the tower arm as a jumper device that electrically connects the transmission line main lines on both sides of the tower, which are held by the tension tower. 2. Description of the Related Art Pipe-type jumper devices are widely used in which both ends of a pipe and main transmission lines on both sides of a steel tower are connected by jumper stranded wires. In this type of pipe-type jumper device, it is considered that a weight (weight) is added to the jumper pipe portion as one of means for suppressing lateral vibration due to wind of the jumper device. In this case, as the weight adding means, (1) increasing the thickness of the jumper pipe itself, (2) inserting a steel rod or the like into the jumper pipe, etc. can be considered.
[0003]
[Problems to be solved by the invention]
In the method (1) of increasing the pipe wall thickness, the jumper pipe is usually manufactured by extrusion using a mold. Therefore, it is usually necessary to make a new mold corresponding to the pipe wall thickness that matches the required weight addition. There is a problem, and it cannot be easily dealt with and the cost increases. Moreover, it is extremely difficult to set an arbitrary weight weight .
The method (2) of inserting the steel rod into the pipe needs to be fixed by welding or the like so that the steel rod does not move. However, the welding operation is complicated and the manufacturing cost is high, and welding is fixed inside the pipe. Therefore, there is a drawback that maintenance is difficult.
[0004]
The present invention has been made in view of the above points. It is possible to easily add a weight at a low cost, and it is easy to set a weight of any weight , and it is easy to maintain an aerial transport. An object of the present invention is to provide a pipe-type jumper device for electric wires.
[0005]
[Means for Solving the Problems]
The pipe-type jumper device for an overhead power transmission line of the present invention that solves the above-described problem is a two-way jumper pipe in which a plurality of stacked flat plate weights are arranged in parallel with each other and in a substantially horizontal state. Between the two spacers in the longitudinal direction of the pipe that maintain the distance between the two jumper pipes on the left and right sides, a Z-shaped weight mounting bracket is disposed between the spacers. The center part is a recess, and the Z-shaped upper flange of the weight mounting bracket is fixed to the recess of the spacer, and the end of the flat plate weight is placed and fixed to the Z-shaped lower flange. The flat weight and the weight fitting are both provided so as not to protrude from the upper and lower surfaces of the jumper pipe.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 shows a standard pipe-type jumper device 1, and FIG. 2 shows only a jumper pipe portion in FIG. The transmission line main line 2 on both sides of the tower is held by a tension retention clamp 3 and is held by a tower arm 6 (the portion shown in the drawing is its tension plate) via a yoke 4, a tension insulator series 5, and the like. A jumper pipe 7 made of an aluminum pipe arranged in a substantially horizontal state below the steel tower arm 6 is suspended at both ends by support rods 8 having upper ends connected to the yoke 4. The jumper stranded wire 9 has a jumper socket 9a compression-connected at one end thereof connected to an electrical connection portion of the tension clamp 3, and a connection socket 9b compression-connected to the other end connected to a battledore terminal 7a at the end of the jumper pipe 7. The main transmission line 2 and the jumper pipe 7 are electrically connected to each other. Reference numeral 10 denotes a jumper spacer for maintaining a distance between the jumper stranded wires 9.
[0010]
In the present invention, as shown in FIG. 2 (b) and the like, a plate-like weight (weight) 11 is disposed between two left and right jumper pipes 7 arranged parallel to each other and in a substantially horizontal state, and The jumper pipe 7 is disposed between the jumper pipes 7 so as not to protrude from the upper and lower surfaces. Further, in the present invention, two plate-like weights 11 are arranged at two positions on both sides in the longitudinal direction between the two jumper pipes 7, both of which are 2 in the longitudinal direction of the pipe for holding the left and right jumper pipes 7 at a predetermined interval. It attaches between the spacers 12 of the location. As shown in detail in FIG. 4, the spacer 12 includes an upper member 13 having arcuate portions 13a on both sides and a lower member 14 having arcuate portions 14a on both sides, and the arcuate portions 13a on both sides. The left and right jumper pipes 7 are clamped and fixed with bolts 15 at 14a.
As shown in FIG. 5, the weight mounting bracket 16 has a Z-shaped cross section, the upper flange 16a is fixed to the upper surface of the spacer 12 with bolts 17, and the end of the flat weight 11 is fixed to the Z-shaped lower flange 16b. And is fixed with bolts 18 penetrating holes formed in the flat weight 11. On the upper surface of the spacer 12 on the end side of the jumper pipe 7, the base plate portion 19 a of the hanging bracket 19 that connects the lower end portion of the support rod 8 and the weight mounting bracket 16 are attached in an overlapping manner. In the present invention, a plurality of flat plate weights 11 are stacked (stacked).
[0011]
In the pipe-type jumper device 1 described above, the flat plate-like weight 11 increases the weight of the jumper pipe 7 and functions to suppress the lateral vibration caused by the wind of the jumper pipe 7. In this case, since the weight to be added to the jumper pipe 7 can be adjusted by adjusting the number of stacked plate weights 11, the clearance characteristic with the steel tower body when the jumper pipe 7 swings is taken into consideration. The added weight can be easily adjusted, and a rational design is possible. Further, the weight to be added to the jumper pipe 7 can be adjusted by adjusting the dimensions such as the length, width, and plate thickness of the flat weight 11.
Further, since the flat weight 11 is between the two jumper pipes 7 on the left and right sides and does not protrude from the upper and lower surfaces of the jumper pipe 7, it does not increase the potential gradient due to the protrusion and deteriorates the corona characteristics. There is no fear.
Further, since the flat weight 11 does not protrude from the upper and lower surfaces of the jumper pipe 7 and is shielded by the jumper pipe 7, the wind pressure load against the side wind does not increase, and therefore, the problem that acts disadvantageously in suppressing the side shake of the entire jumper device. Does not occur.
Moreover, it is very easy to fix the flat weight 11 to the weight mounting bracket 16 attached to the spacer 12 with the bolts 18 and the workability is good. Moreover, weight addition can be performed at low cost.
In addition, in the case of the lever type pipe-type jumper devices 1A, 1B, and 1C as shown in FIGS. 6, 7, and 8, the vertical load component is always applied to the insulators 20, 21, and 22 by adding the flat plate weight 11. In addition, there is no risk of pulse noise occurring at all times or during jumper oscillation.
[0012]
The pipe-type jumper device to which the present invention can be applied is not limited to the standard-type pipe-type jumper device 1 described above, but a single point unit in which the center of the jumper pipe 7 is suspended by a suspended insulator 20 as shown in FIG. The present invention can also be applied to a suspended pipe type jumper device 1A.
Further, as shown in FIG. 7, the present invention can also be applied to a two-point single suspension pipe type jumper device 1 </ b> B in which two portions near the center of the jumper pipe 7 are suspended by a suspended insulator series 21. Further, as shown in FIG. 8, an inverted V-type two-point single-hanging pipe-type jumper device that supports both end portions of the jumper pipe 7 at the lower end portions of the two insulator series 22 whose upper ends are connected to the steel tower arm 6. It can also be applied to 1C. In short, the support system of the jumper pipe 7 is arbitrary. 6, 7, and 8, the positions where the flat weights 11 are disposed and the structure of the portions other than the jumper pipe 7 support structure are the same as those in the embodiment of FIGS. 1 to 5.
[0013]
In the embodiments, the flat weight 11 is disposed at two locations in the longitudinal direction on both sides of the jumper pipe 7, Ru can be disposed in the intermediate portion.
[0015]
【The invention's effect】
According to the pipe type jumper device for an overhead power transmission line of the present invention, a plurality of stacked flat plate weights are used to maintain the distance between the left and right jumper pipes between the left and right jumper pipes. Between the two spacers in the direction, a Z-shaped weight mounting bracket is disposed, and the spacer has a recess in the center in the left-right direction on the upper surface. By fixing the upper flange of the flat plate in the recess of the spacer and mounting and fixing the end of the flat plate weight on the Z-shaped lower flange, both the flat plate weight and the weight mounting bracket are attached to the jumper pipe. Since it is the structure provided so that it may not protrude from a lower surface, there exist the following various effects.
(1) Placing a plate-like weight between two jumper pipes is extremely easy and cheaper than the method of increasing the pipe wall thickness or the method of inserting and fixing a steel rod in the pipe. Addition can be made, and the intended purpose for preventing the jumper device from sideways can be achieved without the difficulty of maintenance as in the case of inserting and fixing the steel rod in the pipe. .
(2) Since the flat plate weight is between the two jumper pipes on the left and right sides and does not protrude from the upper and lower surfaces of the jumper pipe, there is no possibility of deteriorating the corona characteristics.
(3) Since the flat weight does not protrude from the upper and lower surfaces of the jumper pipe and is shielded by the jumper pipe, it does not increase the wind pressure load against the side wind, and thus has a disadvantageous effect on the suppression of the side shake of the entire jumper device. Does not occur.
(4) In the case of an insulator-suspended pipe-type jumper device, since a vertical load component is always applied to the insulator by adding a flat plate weight, there is no possibility of generating pulse noise at all times or when the jumper is shaken.
[0016]
(5) Furthermore, since the flat plate weight is made up of a plurality of laminated plates, the weight to be added to the jumper pipe can be easily adjusted by adjusting the number of stacked flat plate weights. It is easy to adjust the additional weight in consideration of the clearance characteristic with the steel tower body at the time of horizontal swing, and rational design is possible. Also, the weight to be added can be easily adjusted by adjusting dimensions such as the length, width, and thickness of the flat plate weight.
[0017]
(6) Furthermore, since the flat plate weight is disposed between the two jumper pipes using the spacer, the flat plate weight can be disposed between the jumper pipes more easily and inexpensively.
[0018]
(7) Further, since the flat plate weight is arranged between the two jumper pipes in a form that is placed on the Z-shaped weight mounting bracket attached to the spacer, the flat plate weight is further easily and inexpensively arranged between the jumper pipes. It can be arranged.
[Brief description of the drawings]
FIG. 1 is a front view showing a pipe-type jumper device for an overhead power transmission line according to an embodiment of the present invention.
2A is an enlarged front view showing only a jumper pipe portion in FIG. 1, and FIG. 2B is a plan view of FIG.
FIG. 3 is an enlarged view of a part A in FIG. 2;
4 is a cross-sectional view taken along the line CC of FIG. 3;
5A is an enlarged cross-sectional front view taken along the line BB in FIG. 2, and FIG. 5B is a perspective view showing only the weight mounting bracket in FIG.
FIG. 6 shows another example of a pipe type jumper device to which the present invention can be applied, and is a front view of a single point suspended pipe type jumper device.
FIG. 7 shows still another example of a pipe-type jumper device to which the present invention can be applied, and is a front view of a two-point single suspension pipe-type jumper device.
[Figure 8] shows still another example of applicable pipe type jumper apparatus of the present invention, Ru front view der inverted V-shaped two-dot single hanging pipe type jumper device.
[Description of marks Nos.]
DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C Pipe type jumper device 2 Transmission line main line 3 Drain clamp 4 Yoke 5 Tensile insulator series 6 Steel tower arm 7 Jumper pipe 8 Support rod 9 Jumper twisted wire 11 Flat weight 12 Spacer 13 Upper member 14 Lower side Members 15, 17, and 18 Bolt 16 Weight mounting bracket 19 Suspension bracket 19a Suspension bracket base plate 20 and 21 Suspended insulator series 22 Insulator series

Claims (1)

A plurality of laminated plate-like weights are arranged in a longitudinal direction of the pipe that holds the distance between the two left and right jumper pipes between the two left and right jumper pipes arranged parallel to each other and in a substantially horizontal state . It is arranged between two spacers via a Z-shaped weight mounting bracket, and the spacer has a recess in the center in the left-right direction on the top surface, and the upper side of the weight mounting bracket on the Z-shape. By fixing the flange to the recess of the spacer and mounting and fixing the end of the flat plate weight to the Z-shaped lower flange, both the flat plate weight and the weight mounting bracket can be attached from the upper and lower surfaces of the jumper pipe. A pipe-type jumper device for an overhead power transmission line, which is provided so as not to protrude.

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