JP2013020916A - Transposition insulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transposition insulator that can absorb variations in an angle of intersection of overhead transmission lines intersecting in three dimensions.SOLUTION: A transposition insulator 10 includes a pair of support insulators 1 and 1, and an intermediate insulator 2. The pair of support insulators 1 and 1 support a pair of overhead transmission lines w1 and w2 intersecting in three dimensions. The intermediate insulator 2 coaxially connects the pair of support insulators 1 and 1 to each other. The intermediate insulator 2 has a pair of first bolt members 21 and 21 at both ends thereof, respectively. A head 21a of each of the first bolt members 21 is held unseparatably in a direction of a central axis, and is held rotatably in a circumferential direction. The first bolt members 21 and 21 are configured to dispose a pair of male screw parts 21b and 21b in opposite directions. Each of the support insulators 1 has a cylinder-like connecting member 12 that protrudes from one end thereof. The connecting member 12 has around the central axis a first female screw part 12a engaged with the first male screw part 21b.

Description

  The present invention relates to a crossed insulator. In particular, the present invention relates to a structure of a cross insulator that can maintain a constant distance between overhead transmission lines that intersect three-dimensionally and can absorb fluctuations in the intersection angle of a pair of overhead transmission lines.

  The overhead power transmission line is installed on a steel tower or a power pole. In this case, a short circuit accident of the overhead power transmission line can be suppressed by keeping the distance between the plurality of overhead power transmission lines arranged in parallel. A device that keeps the distance between the overhead power transmission lines constant is called a so-called interphase spacer. In many cases, the interphase spacer holds an overhead power transmission line at both ends of the insulating rod to ensure a predetermined interphase distance.

  As such an interphase spacer, when the overhead power transmission lines are buckled by approaching each other, they can bend well (buckled and deformed). An interphase spacer for an overhead power transmission line that can suppress a so-called “galloping phenomenon” that swings greatly is disclosed (for example, see Patent Document 1).

  The interphase spacer according to Patent Document 1 is an interphase spacer for an overhead power transmission line interposed between opposing overhead power transmission lines, and includes a first polymer insulator connected to one overhead power transmission line and the other overhead power transmission line. And a second plate insulator connected to the first polymer insulator and a second plate insulator connecting the second polymer insulator to the second polymer insulator, and the connection member is formed to be deformable.

  In addition, as such an interphase spacer, there is disclosed an interphase spacer that can adjust the distance between a plurality of overhead power transmission lines arranged in parallel and can be easily installed in the field (for example, see Patent Document 2).

  The interphase spacer according to Patent Document 2 is a spacer body in which columnar or cylindrical connection portions are formed on end fittings of upper and lower insulators that support an overhead power transmission line, and the length of the connection portion can be adjusted in a cylindrical or rod shape. Is fitted.

JP 2003-224924 A Japanese Utility Model Laid-Open No. 1-174726

  For example, at an intersection in an urban area, an overhead power transmission line erected on a utility pole may cross three-dimensionally. In this case, the upper overhead transmission line and the lower overhead transmission line are connected with a cross insulator to prevent a short circuit between the upper overhead transmission line and the lower overhead transmission line.

  The existing cross insulator wraps and holds the upper end portion and the upper overhead power transmission line with the bind line, and also winds and holds the lower end portion and the lower overhead power transmission line with the bind line. However, if the crossing angle of the upper and lower overhead power transmission lines fluctuates violently due to strong winds or the like, the winding strength of the bind line is reduced, and there is a concern that the crossing insulator will fall off due to this.

  The interphase spacer according to Patent Document 1 can easily absorb the vibration of a pair of overhead power transmission lines that swing in the vertical direction, but it is difficult to absorb the fluctuation of the crossing angle between the upper and lower overhead power transmission lines. There is a problem.

  The interphase spacer according to Patent Document 2 can change the distance between the upper and lower overhead power transmission lines, but it is configured to change the interphase distance step by step, and a cross insulator configured to continuously change the interphase distance is desired. It is rare.

  The present invention has been made in view of such a problem, and is a crossing insulator that maintains a constant distance between overhead transmission lines that are three-dimensionally crossed and absorbs fluctuations in the intersection angle of a set of overhead transmission lines. An object of the present invention is to provide a cross insulator that is capable of continuously changing the interphase distance.

  The inventor forms a cross insulator with a pair of support insulators that support a pair of overhead transmission lines that are three-dimensionally crossed and a central insulator that coaxially connects these end insulators, and ends of the support insulator and the central insulator. The part is considered to be able to solve these problems by connecting with a bolt member so as to be rotatable and the axial distance is variable, and based on this, the following new insulator is invented. It came to.

  (1) A cross insulator according to the present invention includes a pair of support insulators that support a pair of overhead transmission lines that are three-dimensionally crossed, and a central insulator that coaxially connects these support insulators, The head has a pair of first bolt members at both ends that are held in the central axis direction so as to be difficult to be detached and that are rotatably held in the circumferential direction and the first male screw portions are arranged in opposite directions. The support insulator has a columnar connecting member that protrudes from one end portion and has a first female threaded portion that engages with the first male threaded portion on the central axis.

  (2) It is preferable that the said connection member has a hexagonal column-shaped rotation part in a base end part so that it can rotate with a tool.

  (3) An end insulator that is coaxially fastened with the support insulator is further provided on the side opposite to the central insulator, and the support insulator includes a columnar power transmission line holding portion that protrudes from the other end of the support insulator. The power transmission line holding portion further includes a notch groove through which the overhead power transmission line can be inserted from an outer peripheral direction, and a second female screw portion screwed on an inner wall of the notch groove, The part lever has a second bolt member projecting from one end of a second male threaded portion that is screwed into the second female threaded portion, and the aerial surface is formed between the bottom surface of the notch groove and the front end surface of the second bolt member. It is preferable to sandwich the power transmission line.

  (4) The notch groove has a first anti-slip member that increases friction with the outer periphery of the overhead power transmission line on the bottom surface, and the second bolt member increases friction with the outer periphery of the overhead power transmission line. It is preferable to have the 2nd anti-slip member to do in a front end surface.

  The cross insulator according to the present invention is composed of a pair of support insulators that support a pair of overhead transmission lines that are three-dimensionally crossed, and a central insulator that coaxially connects these support insulators, and the end portions of the support insulator and the central insulator are Because it is connected by the first bolt member so that it can rotate and the axial distance is variable, it can absorb the fluctuation of the crossing angle of a set of overhead power transmission lines and continuously change the interphase distance it can.

It is a front view which shows the structure of the crossing insulator by one Embodiment of this invention, and has shown the principal part with the longitudinal cross-section. It is a perspective view which shows the structure of the crossing insulator by the said embodiment. It is a front view of the crossing insulator by the said embodiment, and is the state figure which varied the distance between a set of overhead power transmission lines from the state of FIG. It is a front view of the crossing insulator by the said embodiment, and is a state figure which made a pair of edge part insulator separate from the state of FIG. It is a top view which shows the example of application of the crossing insulator by the said embodiment, and is a state figure which the three-phase overhead power transmission line crossed three-dimensionally.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Composition of crossed lions]
Initially, the structure of the crossing insulator by one Embodiment of this invention is demonstrated.

  FIG. 1 is a front view showing a configuration of a crossed insulator according to an embodiment of the present invention, and shows a main part in a longitudinal section. FIG. 2 is a perspective view showing the configuration of the crossing insulator according to the embodiment. FIG. 3 is a front view of the cross insulator according to the embodiment, and is a state diagram in which the distance between a pair of overhead power transmission lines is changed from the state of FIG. FIG. 4 is a front view of the cross insulator according to the embodiment, and is a state diagram in which a pair of end insulators are separated from the state of FIG. 1.

  Referring to FIG. 1 or FIG. 2, a cross insulator 10 according to an embodiment of the present invention includes a pair of support insulators 1 and 1 and a central insulator 2. One support insulator 1 supports an upper overhead power transmission line (hereinafter abbreviated as an electric wire) w1. The other supporting insulator 1 supports the lower electric wire w2. The central insulator 2 connects a pair of support insulators 1 and 1 coaxially.

  Referring to FIGS. 1 to 4, the central insulator 2 has a main body 20 made of porcelain. The main body 20 extends a plurality of umbrella-shaped collar portions 2a in the outer peripheral direction. The central insulator 2 holds a pair of first bolt members 21 and 21 at both ends of the main body 20.

  Referring to FIG. 1 or FIG. 3 and FIG. 4, the first bolt member 21 includes a head portion 21a and a first male screw portion 21b. The head portion 21 a is held in the central axis direction of the main body 20 so as not to be detached. Further, the head 21 a is held so as to be rotatable in the circumferential direction of the main body 20. And with respect to the main body 20, a pair of 1st male thread part 21b * 21b is arrange | positioned in the opposite direction.

  Referring to FIG. 1 or FIG. 3 and FIG. 4, the support insulator 1 has a main body 11 made of porcelain. Further, the support insulator 1 projects a columnar connecting member 12 from one end of the main body 11. And the connection member 12 is provided with the 1st internal thread part 12a screwed together in the 1st external thread part 21b in the center axis | shaft.

  Referring to FIG. 1 or FIG. 3 and FIG. 4, the connecting member 12 is provided with a hexagonal column-shaped turning portion 12 b at the base end portion. When a tool such as a spanner (not shown) is inserted into the gap between the support lever 1 and the center lever 2 and is turned around the turning portion 12b, the first female screw portion 12a can be screwed into the first male screw portion 21b. The distance in the height direction of the pair of electric wires w1 and w2 can be continuously changed.

  1 to 4, the cross insulator 10 further includes a pair of end insulators 3 and 3. The end insulator 3 includes the main body 30 made of porcelain. The end insulator 3 has a second bolt member 31. The second bolt member 31 includes a head portion 31a and a second male screw portion 31b. The head portion 31 a is embedded in the main body 30. The second male screw portion 31 b protrudes from one end portion of the main body 30.

  With reference to FIG. 1 or FIG. 3 and FIG. 4, the support insulator 1 further includes a cylindrical power transmission line holding portion 13 protruding at the other end. The power transmission line holding part 13 has a notch groove 13a and a second female screw part 13b (see FIG. 4). The electric wire w1 or the electric wire w2 can be inserted in the notch groove 13a from those outer peripheral directions. The second female screw portion 13b is screwed on the inner wall of the notch groove 13a.

  Referring to FIG. 1 or FIG. 3 and FIG. 4, the second male screw portion 31b can be screwed into the second female screw portion 13b. When the second male screw portion 31b is fastened to the second female screw portion 13b in a state where the electric wire w1 or the electric wire w2 is inserted into the notch groove 13a, the electric wire w1 or the electric wire w1 or the tip end surface of the second bolt member 31 is fastened. The electric wire w2 can be clamped.

  Referring to FIG. 1 or FIG. 3 and FIG. 4, the notch groove 13a adheres the first anti-slip member 131 such as a rubber plate to the bottom surface. On the other hand, the second bolt member 31 has a second anti-slip member 132 such as a rubber plate adhered to the tip surface.

  Referring to FIG. 1, FIG. 3, and FIG. 4, when the second male screw portion 31 b is fastened to the second female screw portion 13 b with the electric wire w <b> 1 or the electric wire w <b> 2 inserted into the notch groove 13 a, the first anti-slip member 131 and The second anti-slip member 132 can increase the friction with the outer periphery of the electric wire w1 or the electric wire w2, and the electric wire w1 or the electric wire w2 can be reliably supported by the support insulator 1.

[Action of crossing insulators]
Next, the operation and effect of the cross insulator 10 will be described while explaining an application example of the cross insulator 10 according to the embodiment. FIG. 5 is a plan view showing an application example of the cross insulator according to the embodiment, and is a state diagram in which three-phase overhead power transmission lines are three-dimensionally crossed.

  As shown in FIG. 5, at an intersection in an urban area or the like, the three-phase electric wire w <b> 1 and the electric wire w <b> 2 installed on the utility pole cross three-dimensionally so as to be orthogonal to each other. Referring to FIGS. 1 to 5, the upper electric wire w <b> 1 and the lower electric wire w <b> 2 are connected by the cross insulator 10 to prevent a short circuit between the upper electric wire w <b> 1 and the lower electric wire w <b> 2.

  Referring to FIGS. 1 to 4, the cross insulator 10 according to the embodiment includes a pair of support insulators 1 and 1 supporting a pair of three-dimensionally intersecting electric wires w1 and w2 and a pair of support insulators 1 and 1 coaxially. A pair of supporting insulators 1 is constituted by the central insulator 2 to be connected, and the end portions of the supporting insulator 1 and the central insulator 2 are connected by the first bolt member 21 so as to be rotatable and the axial distance is variable. The insulators 1 and 1 can rotate independently of each other, and can absorb the fluctuation of the crossing angle of the pair of electric wires w1 and w2.

  Referring to FIGS. 1 to 4, the support insulator 1 includes a connecting member 12 that can be screwed into the first bolt member 21. Referring to FIG. 1, when the turning portion 12 b is rotated in one direction with a tool (not shown) such as a spanner, the pair of support insulators 1 and 1 can be moved in a direction away from each other. The distance between w1 and w2 can be enlarged (see FIG. 3).

  On the other hand, referring to FIG. 3, when the turning portion 12b is rotated in the other direction with a tool (not shown) such as a spanner, the pair of support insulators 1 and 1 can be moved in a relatively approaching direction. The distance between the wires w1 and w2 can be reduced (see FIG. 1). For example, a hole (not shown) into which the pin is inserted is preferably opened in the central insulator 2 in order to hold the head 21a with a pin (not shown) so that the head 21a does not rotate. The connecting member 12 can be screwed together without the member 21 rotating. Thus, the cross insulator 10 according to the embodiment can continuously change the interphase distance.

  With reference to FIGS. 1 to 4, the cross insulator 10 according to the embodiment can be conveniently assembled by inserting the electric wire w <b> 1 or the electric wire w <b> 2 into the notch groove 13 a provided in the support insulator 1.

  Referring to FIG. 1 or FIG. 3 and FIG. 4, when the second male screw portion 31b is fastened to the second female screw portion 13b in a state where the electric wire w1 or the electric wire w2 is inserted into the cutout groove 13a, a rubber plate or the like is formed. The first anti-slip member 131 and the second anti-slip member 132 can increase the friction with the outer periphery of the electric wire w1 or the electric wire w2, and the electric wire w1 or the electric wire w2 can be reliably supported by the support insulator 1.

  Although the crossing insulator according to the present invention has disclosed an embodiment in which the distance between the overhead transmission lines crossing the horizontal plane is kept constant, the crossing insulator according to the present invention determines the distance between the overhead transmission lines crossing the vertical plane. It can also be held constant.

1.1 Pair of support insulators 2 Central insulator 10 Cross insulator 12 Connecting member 12a First female screw portion 21 First bolt member 21a Head portion 21b First male screw portion w1 and w2 One set of electric wires (aerial transmission line)

Claims (4)

A pair of support insulators for supporting a pair of overhead transmission lines
A central insulator for connecting these supporting insulators on the same axis, and
The central insulator has a pair of first bolt members whose heads are held in the central axis direction so as to be difficult to be detached and are rotatably held in the circumferential direction, and in which the first male screw portions are arranged in opposite directions. At both ends,
The support lever protrudes from one end portion and has a columnar connecting member having a first female screw portion that engages with the first male screw portion as a central axis.   The crossing insulator according to claim 1, wherein the connecting member has a hexagonal column-shaped turning portion at a base end portion so that the connecting member can be rotated by a tool. Further comprising an end insulator that is coaxially fastened with the support insulator on the opposite side of the central insulator,
The support insulator further includes a cylindrical power transmission line holding portion protruding from the other end of the support insulator,
The power transmission line holding unit is
A notch groove through which the overhead power transmission line can be inserted from the outer circumferential direction;
A second female thread portion screwed on the inner wall of the notch groove,
The end lever has a second bolt member projecting from one end portion of a second male screw portion that is screwed into the second female screw portion,
The cross insulator of Claim 1 or 2 which clamps the said overhead power transmission line with the bottom face of the said notch groove, and the front end surface of a 2nd bolt member. The notch groove has a first anti-slip member on the bottom surface that increases friction with the outer periphery of the overhead power transmission line,
4. The cross insulator according to claim 3, wherein the second bolt member has a second anti-slip member that increases friction with an outer periphery of the overhead power transmission line on a tip surface.

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