JP2015043666A - Opening/closing-type conductor vibration prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing-type conductor vibration prevention device that is attached to an overhead conductor to restrain the overhead conductor from generating vibrations due to a breeze.SOLUTION: An opening/closing-type conductor vibration prevention device 1 for suppressing vibrations of an overhead conductor includes: a pair of first and second semi-cylindrical weight parts 21 and 22 for holding the overhead conductor; a hinge part 3 for openably/closably connecting the pair of first and second weight parts 21 and 22; a pair of extension parts 41 and 42 that are provided on the other side of the hinge part 3 in the pair of first and second weight parts 21 and 22 and that are extended like a plate outward from the pair of first and second weight parts 21 and 22; and a plurality of shear bolts 5 for fastening the pair of extension parts 41 and 42.

Description

  TECHNICAL FIELD The present invention relates to an open / close type electric wire vibration preventing device that is attached to an overhead electric wire in order to suppress vibration generated by the wind from the overhead electric wire.

  Conventionally, a slight wind vibration constantly generated in an overhead electric wire by a relatively gentle and uniformly blowing wind causes fatigue fracture of the overhead electric wire, wear and breakage of metal fittings, and the like. Therefore, a technique has been proposed in which a wire vibration preventing device called a damper is attached to an overhead electric wire to suppress slight wind vibration. For example, a wire vibration prevention device called a double torsional damper has a structure in which a steel stranded wire attached to an overhead electric wire and extending in the horizontal direction is provided, and a pair of eccentric weights are fixed to both ends of the steel stranded wire. I have. FIG. 6 is a perspective view showing such a double torsional damper.

  As shown in FIG. 6A, the double torsional damper 100 includes an electric wire gripping portion 110, a steel stranded wire 120, and a weight 130. Here, the electric wire gripping part 110 is attached so as to sandwich the overhead electric wire 140 from both sides, and is attached to the overhead electric wire 140 by fastening the bolt 111. In addition, the electric wire gripping part 110 holds a steel stranded wire 120 extending in parallel with a predetermined interval at the lower part in the vertical direction of the overhead electric wire 140. The steel stranded wire 120 has a pair of weights 130 each formed in a spherical shape fixed to both ends.

  In the double torsional damper 100 formed in this way, when a slight wind vibration occurs in the overhead wire 140, the weights 130 provided at both ends of the steel stranded wire 120 with the wire gripping portion 110 as the center are connected to the overhead wire 140. The steel stranded wire 120 is bent by operating in the vertical direction. Thus, the double torsional damper 100 converts the vibration of the overhead electric wire 140 into the friction energy between the strands of the steel stranded wire 120 and dissipates it.

  The double torsional damper 100A shown in FIG. 6 (B) has the same configuration as the double torsional damper 100 shown in FIG. 6 (A), but the position for supporting the steel stranded wire 120 of the wire gripping part 110A is also the same. The difference is that the overhead electric wire 140 is attached so as to be supported at a position inclined at a predetermined angle with respect to the vertical direction of the overhead electric wire 140. Further, the weights 130A provided at both ends of the steel stranded wire 120 are formed in a substantially spherical shape, and holes for inserting the both ends of the steel stranded wire 120 into predetermined positions eccentric from the center of the substantially spherical shape. Another difference is that 131A is formed. The weight 130A is attached to both ends of the steel stranded wire 120 in different directions (the left-right direction shown in FIG. 6B), and fixed so as to apply a twisting moment to the steel stranded wire 120. Has been.

  In the double torsional damper 100A formed in this way, when a slight wind vibration occurs in the overhead electric wire 140, the torsional moment to the overhead electric wire 140 by the electric wire gripping portion 110A and the steel twisted wire 120 by the weight 130A are also applied. Each torsional moment was applied, and the slight wind vibration of the overhead electric wire 140 was converted into frictional energy and dissipated.

JP 2001-309534 A

  In the conventional double torsional damper having such a configuration, the following problems have been pointed out. That is, the overhead electric wire 140 may be disconnected in the vicinity of the joint portion with the wire gripping portions 110 and 110A due to secular change due to slight wind vibration. In addition, when there is a gap between the overhead wire 140 and the wire gripper 110, 110A in the wire gripping portions 110, 110A, it is sometimes observed during maintenance that the overhead wire 140 may be worn away by a slight wind vibration and disconnected. It had been. Further, the joints 131 and 131A of the pair of weights 130 and 130A attached to both sides of the steel stranded wire 120 are damaged due to vibration, or the stranded corrosion of the steel stranded wire 120 is broken, and the weights 130 and 130A are dropped. There was also a bug that occurred.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an electric wire vibration preventing apparatus capable of suppressing light wind vibration with a simpler structure.

  The present invention is an open / close type electric wire vibration preventing device that suppresses vibration of an overhead electric wire, and a pair of semi-cylindrical weight portions that grip the overhead electric wire, and a hinge portion that connects the pair of weight portions so as to be openable and closable. And a pair of extending portions provided on the opposite side of the pair of weight portions to the hinge portion and extending outwardly in a plate shape from the pair of weight portions, and the pair of extending portions are fastened The present invention relates to an open / close type electric wire vibration preventing device including a plurality of shear bolts.

  According to the present invention, the open / close type electric wire vibration preventing device includes a pair of weight portions that hold the overhead electric wire, a hinge portion that connects the pair of weight portions so as to be opened and closed, and a hinge portion in the pair of weight portions. And a plurality of shear bolts for fastening the pair of extension portions. Accordingly, the overhead wire is held by a pair of weight portions connected by a hinge portion, and the pair of weight portions are fastened with a shear bolt at the pair of extension portions, thereby easily preventing the wire vibration preventing device. It is attached to an overhead electric wire and can suppress slight wind vibration. Therefore, it is possible to suppress light wind vibration with a simpler structure.

  Moreover, in this invention, it is preferable that a pair of said extension part is comprised heavier than the said hinge part.

  According to the present invention, by configuring the pair of extending portions to be heavier than the hinge portion, the mass balance of the open / close type electric wire vibration preventing device can be varied. Therefore, the effect of suppressing the slight wind vibration by the open / close type electric wire vibration preventing device can be improved.

  Moreover, in this invention, it is preferable that the length of the width direction of a pair of said extension part is longer than the length of the width direction of the said hinge part.

  According to the present invention, by making the length in the width direction of the pair of extending portions longer than the length in the width direction of the hinge portion, the mass of the extending portion can be increased more than the mass of the hinge portion. Therefore, since the mass balance of the open / close type electric wire vibration preventing device can be varied, the effect of suppressing the slight wind vibration by the open / close type electric wire vibration preventing device can be improved.

  In the present invention, it is preferable that the pair of weight portions include a first weight portion and a second weight portion heavier than the first weight portion.

  According to this invention, the first weight portion and the second weight portion having different masses are arranged in the vertical direction, and a difference occurs in the mass balance in the vertical direction. Thereby, since the mass balance of the open / close type electric wire vibration preventing device can be varied in the vertical direction, the effect of suppressing the slight wind vibration can be further improved.

  According to the open / close type electric wire vibration preventing apparatus of the present invention, it is possible to suppress light wind vibration with a simpler structure.

1 is a perspective view showing an open / close type electric wire vibration preventing apparatus according to a first embodiment of the present invention. It is sectional drawing of the width direction of the switching type electric wire vibration prevention apparatus which concerns on 1st Embodiment, and is the XX sectional view taken on the line of FIG. It is a top view which shows the open / close type electric wire vibration prevention apparatus which concerns on 1st Embodiment, FIG. 3 (A) shows the top view of FIG. 1, FIG.3 (B) shows the bottom view of FIG. It is a figure which shows the attachment method to the overhead electric wire of the switching type electric wire vibration prevention apparatus which concerns on 1st Embodiment. It is sectional drawing which shows the switching type electric wire vibration prevention apparatus which concerns on 2nd Embodiment, and is a figure corresponding to FIG. It is a perspective view which shows the conventional double torsional damper.

Hereinafter, preferred embodiments of the open / close type electric wire vibration preventing apparatus of the present invention will be described.
[Configuration of open-circuit type wire vibration prevention device]
First, the configuration of the open / close type electric wire vibration preventing apparatus 1 according to the first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the open / close type electric wire vibration preventing apparatus 1 according to the first embodiment includes a pair of first weight portions 21, a second weight portion 22, a hinge portion 3, and a pair of extending portions 41. , 42 and a plurality of shear bolts 5.

  As shown in FIGS. 1 and 2, the pair of first weight portion 21 and second weight portion 22 are formed in a semi-cylindrical shape having substantially the same shape and the same size. A pair of 1st weight part 21 and 2nd weight part 22 are comprised with a metal whose specific gravity is heavier than the metal which comprises an overhead electric wire, such as lead alloy. In the first embodiment, the pair of first weight parts 21 and second weight parts 22 are configured to have substantially the same mass.

  The hinge part 3 connects a pair of 1st weight part 21 and 2nd weight part 22 so that opening and closing is possible, as shown in FIG.1 and FIG.2. More specifically, the hinge part 3 is a pair of first weights in a state where the pair of first weight parts 21 and the second weight part 22 face each other so that the semicylindrical concave parts face each other. One side of the part 21 and the second weight part 22 are connected to each other.

  As shown in FIGS. 2 and 3, the hinge part 3 includes a hinge part main body 31 and a shaft part 32. The hinge part main body 31 is a flat hinge having a rectangular shape in plan view and having through holes extending along the longitudinal direction of the first weight part 21 and the second weight part 22. A plurality of hinge part main bodies 31 are provided at predetermined intervals in the longitudinal direction in each of the pair of first weight part 21 and second weight part 22. Moreover, the hinge part main body 31 provided in each of the pair of first weight part 21 and the second weight part 22 is in a state where the pair of first weight part 21 and the second weight part 22 face each other. It is arranged at a position that does not overlap. The shaft portion 32 is formed of a mandrel or an elongated pin, and is inserted into the through hole of the hinge portion main body 31.

As shown in FIGS. 2 and 3, the pair of extending portions 41 and 42 are formed to extend outward from the pair of first weight portion 21 and second weight portion 22 in a plate shape. More specifically, the pair of extending portions 41 and 42 are the other side portions of the pair of first weight portion 21 and second weight portion 22 (the side portions on the side where the hinge portion 3 is not provided). ) To the outside. The pair of extending portions 41 and 42 extend in the overlapping direction with the pair of first weight portions 21 and second weight portions 22 closed. The extension length of the pair of extension portions 41 and 42 is substantially equal to the width of the hinge portion 3.
A plurality of bolt holes 43 are formed in the pair of extending portions 41 and 42 at predetermined intervals in the longitudinal direction. As shown in FIG. 2, the plurality of bolt holes 43 are formed by screw holes that pass through one extending portion 42 and extend to the middle of the other extending portion 41.
The pair of extending portions 41 and 42 is formed integrally with the pair of first weight portion 21 and second weight portion 22, respectively.

  The plurality of shear bolts 5 are fastened to each of the plurality of bolt holes 43. The shear bolt 5 includes a bolt head 51 and a female screw portion 52.

[Attachment method of open / close type wire vibration prevention device to overhead wire]
Next, the attachment method to an overhead electric wire using the open / close type electric wire vibration preventing apparatus 1 according to the first embodiment of the present invention will be described with reference to FIG.

  First, as shown in FIG. 4A, the open / close type electric wire vibration preventing apparatus 1 is in a state in which the pair of first weight portions 21 and second weight portions 22 are closed. Next, as shown in FIG. 4 (B), the end of one extending portion 42 of the open / close type electric wire vibration preventing apparatus 1 is lifted, and one second weight portion 22 is opened upward. In this state, the overhead electric wire 6 is approached and inserted so that the overhead electric wire 6 is brought into close contact with the concave portion of the other first weight portion 21 which is the lower side of the open / close type electric wire vibration preventing device 1.

  Next, as shown in FIG. 4C, in the state where the overhead electric wire 6 is inserted into the concave portion of the other first weight part 21, as shown in FIG. 22 is closed. Then, the shear bolt 5 is inserted into the plurality of bolt holes 43 and fastened. The shear bolt 5 is formed so that the bolt head 51 is cut when a specified bolt axial force is generated, and the bolt is not loosened in a state where only the female screw portion 52 is inserted into the bolt hole 43. The pair of extending portions 41 and 42 are firmly fastened by the shear bolt 5. Accordingly, the open / close type electric wire vibration preventing device 1 is attached to the overhead electric wire 6.

[Effect of open / close type wire vibration prevention device]
The open / close type electric wire vibration preventing apparatus 1 according to the first embodiment described above has the following effects.

  (1) The open / close type electric wire vibration preventing device 1 includes a pair of first weight portions 21 and second weight portions 22 that hold the overhead electric wire 6, and a pair of these first weight portions 21 and second weight portions. A pair of first weight portions 21, a pair of extending portions 41, 42 provided on the opposite side of the hinge portion 3 in the second weight portion 22, And a plurality of shear bolts 5 that fasten the extending portions 41 and 42. As a result, the overhead electric wire 6 is gripped by the pair of first weight portions 21 and second weight portions 22 connected by the hinge portion 3, and the pair of first weight portions 21 and second weight portions 22. Is fastened with the shear bolt 5 at the pair of extending portions 41, 42, so that the wire vibration preventing device 1 can be easily attached to the overhead wire 6. Therefore, it is possible to suppress light wind vibration with a simpler structure.

[Open / close type electric wire vibration preventing apparatus according to the second embodiment]
Next, the configuration of the open / close type electric wire vibration preventing apparatus 1A according to the second embodiment of the present invention will be described with reference to FIG.
The open / close type electric wire vibration preventing apparatus 1A according to the second embodiment is different from the first embodiment mainly in the configuration of the pair of extending portions 41A and 42A. In the description of the second embodiment, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  In the second embodiment, the extension length (length in the width direction) of the pair of extension portions 41 </ b> A and 42 </ b> A is configured to be longer than the length in the width direction of the hinge portion 3. In the second embodiment, the bolt holes 43A are formed in two rows in the width direction. Thereby, in 2nd Embodiment, a pair of extension part 41A, 42A is comprised more heavily than the hinge part 3. As shown in FIG.

[Attachment method of the open / close type electric wire vibration preventing apparatus according to the second embodiment to an overhead electric wire]
Next, an attachment method to an overhead electric wire using the open / close type electric wire vibration preventing apparatus 1A according to the second embodiment of the present invention will be described with reference to FIGS.

The method of attaching to the overhead wire using the open / close type electric wire vibration preventing apparatus 1A according to the second embodiment is basically the same as the method of the open / close type electric wire vibration preventing apparatus 1 according to the first embodiment.
Here, the open / close type electric wire vibration preventing device 1A according to the second embodiment is configured such that the extension length of the pair of extension portions 41A and 42A is longer than the length of the hinge portion 3 in the width direction. The pair of extending portions 41 </ b> A and 42 </ b> A is heavier than the hinge portion 3. Accordingly, as shown in FIG. 5B, the open / close type electric wire vibration preventing device 1A is attached in a state where the pair of extending portions 41A and 42A are positioned below.

[Effect of the open / close type electric wire vibration preventing device according to the second embodiment]
According to the open / close type electric wire vibration preventing apparatus 1A of the second embodiment described above, in addition to the above-described effect (1), the following effect can be obtained.

  (2) By configuring the pair of extending portions 41A and 42A to be heavier than the hinge portion 3, the mass balance of the open / close type electric wire vibration preventing device 1A can be varied. Therefore, the effect of suppressing the slight wind vibration by the open / close type electric wire vibration preventing device can be improved.

  (3) By making the length in the width direction of the pair of extending portions 41 </ b> A and 42 </ b> A longer than the length in the width direction of the hinge portion 3, the mass of the pair of extending portions 41 </ b> A and 42 </ b> A is greater than the mass of the hinge portion 3. Is also increased. Therefore, since the mass balance of the open / close type electric wire vibration preventing apparatus 1A can be varied, the effect of suppressing the slight wind vibration by the open / close type electric wire vibration preventing apparatus 1A can be improved.

As mentioned above, although preferable embodiment of the opening-and-closing type electric wire vibration prevention apparatus of this invention was described, this invention is not restrict | limited to embodiment mentioned above and can change suitably.
For example, in the first embodiment and the second embodiment, the weights of the pair of first weight portions 21 and second weight portions 22 are configured to be the same mass, but the present invention is not limited thereto. That is, the pair of weight parts may be configured by a first weight part having a predetermined mass and a second weight part heavier than the first weight part. In this case, the first weight portion and the second weight portion having different masses are arranged in the vertical direction, and a difference occurs in the mass balance in the vertical direction. Thereby, since the mass balance of the open / close type electric wire vibration preventing device can be varied in the vertical direction, the effect of suppressing the slight wind vibration can be further improved.

  In the second embodiment, the pair of extending portions 41A, 42A is made longer than the length of the hinge portion 3 in the width direction of the pair of extending portions 41A, 42A. Although heavier than that, it is not limited to this. That is, the pair of extending portions may be configured to be heavier than the hinge portion by increasing the thickness of the pair of extending portions.

  Moreover, in 2nd Embodiment, although a pair of extension part 41A, 42A comprised heavier than the hinge part 3, it is not restricted to this. That is, the hinge part may be configured to be heavier than the pair of extending parts.

  In the present invention, the wind pressure load received by the open / close type electric wire vibration preventing device can be reduced by attaching the open / close type electric wire vibration preventing device so that the hinge part and the pair of extending parts are oriented in the horizontal direction. Moreover, the vibration suppression effect by a shearing force can be improved by attaching the open / close type electric wire vibration preventing device so that the hinge portion and the pair of extending portions are directed in the vertical direction.

DESCRIPTION OF SYMBOLS 1, 1A Opening-and-closing type electric wire vibration prevention apparatus 21 1st weight part 22 2nd weight part 3 Hinge part 41, 41A Extension part 42, 42A Extension part 5 Shear bolt 6 Overhead electric wire

Claims (4)

An open / close type wire vibration prevention device that suppresses vibration of overhead wires,
A pair of semi-cylindrical weights for holding the overhead electric wire;
A hinge portion that connects the pair of weight portions so as to be openable and closable;
A pair of extending portions provided on the opposite side of the hinge portion in the pair of weight portions, and extending outwardly in a plate shape from the pair of weight portions;
An open / close type electric wire vibration preventing device comprising: a plurality of shear bolts that fasten the pair of extending portions.   The open / close type electric wire vibration preventing device according to claim 1, wherein the pair of extending portions is configured to be heavier than the hinge portion.   The length of the width direction of a pair of said extension part is an open / close type electric wire vibration prevention apparatus of Claim 2 comprised longer than the length of the width direction of the said hinge part. The pair of weight parts includes a first weight part and a second weight part heavier than the first weight part. .

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