JP2988568B2 - Multi-conductor transmission line interphase spacer mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching an interphase spacer to a multiconductor power transmission line.

[0002]

2. Description of the Related Art In order to prevent an interphase short-circuit accident in which conductors of each phase of an overhead power transmission line cause galloping vibration and contact with each other, conductor gripping clamps are provided on upper and lower ends of an insulating rod made of a long trunk-shaped insulator or a polymer insulator. The interphase spacer provided with
Each phase conductor is attached between the upper and lower phase conductors to prevent contact between them.However, in the case of a multi-conductor power transmission line, the individual behavior of each element conductor is not necessarily the same, and each element conductor moves in the longitudinal direction. Then, an excessive stress is applied to each of the conductor holding clamps. Therefore, a conductor holding clamp adapted to respond to the longitudinal movement of the conductor is used.

[0003] For example, a plurality of clamps for gripping element conductors of each phase above and below a multiconductor power transmission line are attached to a conductor focusing yoke, and the conductor focusing yokes are attached to both upper and lower ends of a rod insulator made of insulator only in the line direction. 52-14, which is movably attached to the main body to cope with the longitudinal movement of each elementary conductor.
No. 9295 is known a multiconductor interphase spacer.

Further, a damper cable or damper rod having a predetermined length connected to an end of an insulating spacer rod made of synthetic resin or porcelain is attached to a multiconductor power transmission line to suppress galloping vibration.
An inter-phase spacer for overhead power transmission lines of -120393 is known.

[0005] In addition, a conductor space for maintaining the spacing between the in-phase conductors.
Clamps are attached to both ends of the
The center of gravity of the upper and lower conductor spacers on both sides of the rod-shaped insulator.
Connect the pins to the ends and move the conductor spacer movably in the vertical plane.
In addition, galloping vibration occurs in one-phase conductor group
Vibration due to interference by conductors of other phases
Of Japanese Utility Model Application No. 51-121797
Interphase spacers for conductors are known.

Further , an inclined surface is formed on the parallel piece of the forked portion.
Between the parallel pieces of the clamp body,
Insert and pivot with a screw pin, connecting rod
So that the end of the
And the connecting rod configured as above
Swing into the holes in the mounting plate at the vertices of the four corners of the main frame.
Spacer for overhead wire of Japanese Utility Model Publication No. 59-18525
Is known.

[0007]

In a configuration in which the conductor holding clamp is movable only in the line direction, as in the multi-conductor interphase spacer disclosed in the above-mentioned utility model application, the multi-conductor in the upper phase or the lower phase is not provided. When the movement of the left and right element conductors in the line direction is in opposite phase, the opposite phase line direction stress is applied between the conductor gripping clamps provided on each conductor converging yoke at both ends of the insulator rod insulator, and the interphase spacer is applied. However, there is a problem that the rod-shaped insulator is destroyed due to a torsional moment, and in particular, it cannot follow the horizontal rotation movement that occurs frequently during subspan galloping.

Also, the interphase spacer for an overhead transmission line disclosed in the above-mentioned patent application is twisted on the insulating spacer rod when the conductors of the upper and lower phases move in opposite phases in the line direction.
In the case of a conductor power line, there is a problem that the twisting force is large and the insulating spacer rod is easily damaged.In addition, if the insulating spacer rod is bent in an arc shape by three jumps, etc., the insulating spacer rod collides with the electric wire. In addition to the risk of damaging the damper cable or the damper cable or the fatigue of the damper rod, the insulating spacer rod may come off, and the connection between the damper cable or damper rod and the insulating spacer rod is complicated, resulting in poor workability. There is a point.

Further , the multiconductor phase disclosed in the above-mentioned utility model application is disclosed.
The space spacer and the overhead wire spacer are movable in the wire direction.
Can't rotate in a horizontal plane
When the line direction movement of the left and right conductors of the multiconductor is in opposite phase
Indicates that a torsional moment is applied to the interphase spacer, causing it to break.
There is a problem.

In order to cope with the torsion that the interphase spacer receives when the directions of the electric wire clamps attached to the upper and lower ends of the polymer insulator of the interphase spacer do not match, the applicant of the present invention has described the following. Japanese Patent Laid-Open No. Hei 6-1 wherein a rotatable joint is provided on a single conductor transmission line so that the wire clamps at both upper and lower ends are rotatable relative to each other.
No. 13435 has developed an interphase spacer, which requires a complicated configuration of a connecting portion between a support of a plurality of wire clamps and a rotatable joint, in order to mount the spacer on a multiconductor power transmission line. In order to construct an interphase spacer with a length that matches the conductor spacing between the upper and lower phases, the length of the charging portion is increased by the amount of the rotatable joint, and the length of the polymer insulator is increased by that amount. As a result, a sufficient length of the polymer insulator cannot be obtained for the distance between the wire clamps at the upper and lower ends.

[0011] The present invention solves the above-mentioned problems, and prevents the polymer insulator insulating rod from being twisted even when the elementary conductors of each phase of the multiconductor transmission line move in opposite phases in the line direction. It is an object of the present invention to provide an inter-phase spacer mounting device for electric wires.

[0012]

In order to achieve the above-mentioned object, an inter-spacer mounting apparatus for a multi-conductor power transmission line according to the present invention is provided. 4 and 5 are provided at both ends of the inter-phase insulating spacer rod 7, and the water at each end of the cable conductor spacer frame is provided.
In the inside 11 of the clamp holding cylinder part in the plane rotation connection part 30
Connect eyebolts 20 that support the lower end of the wire gripping clamp.
By being elastically supported by the tie spring 21, the electric wire is held.
The clamp 10 is connected rotatably downward in a horizontal plane,
One, the wire direction rotation at the upper end of the eyebolt 20
The electric wire gripping clamp 10 is moved in the electric wire direction by the connecting portion 40.
And rotatably connected to the main body .

[0013]

The electric wire holding clamp 10 grips each element conductor of each phase above and below the multi-conductor transmission line, and the inter-element spacer frames 1, 2, 4, and 5 determine the spacing between each element conductor of the same phase. Is maintained at a predetermined interval corresponding to the length. The inter-phase insulating spacer rod 7 holds the upper phase multiconductor and the lower phase multiconductor at a predetermined interval corresponding to the length of the insulating spacer rod 7 so that the upper phase and the lower phase during galloping vibration are maintained. Prevents phase conductors from contacting each other.

Even if the individual elementary conductors move individually in the line direction, each wire gripping clamp 10 is rotatably connected to the spacer frame between the elementary conductors in the wire direction by the wire direction rotating connecting portion 40. Therefore, it is possible to individually rotate and follow the direction of the electric wire, and no unreasonable stress is applied to the interphase insulating spacer rod 7 of the polymer insulator.

The electric wire gripping clamp 10 is a
In the inside 11 of the clamp holding cylinder part in the dynamic connection part 30
An eyebolt 20 supporting the lower end of the wire gripping clamp
The gap between the element conductors is elastically supported by the connection spring 21.
Pivotally connected to the pacer frame in a horizontal plane
Therefore, even if the line movement of each element conductor in the line direction is in opposite phase and a torsional moment is applied to the interphase spacer,
Take place in the horizontal direction rotated lagged when subspan galloping, individual wires gripping clamp 10 which grips the respective element conductors, respectively water to the conductor between the spacer frame
It rotates freely in a plane and follows freely, and the spring of the connecting spring 21
It can follow elastically with force, and turn in the track direction
Clamping due to the expansion and contraction of the connecting spring 21 against dynamic movement
Since various vibration stresses acting on the portion are relieved , no unreasonable torsional stress is applied to the interphase insulating spacer rod 7 of the polymer insulator.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for mounting a spacer between phases of a multiconductor power transmission line according to the present invention. FIGS. 1, 3 and 4 show an embodiment in which the present invention is applied to a 275 KV-class four-conductor power transmission line. A1, A2, A3, and A4 denote a four-conductor A (reference numeral) on the upper side of the four-conductor power transmission line. A is each elementary conductor of FIG. 3), and B1, B2, B3, and B4 are each elementary conductor of four conductors B (reference number B is FIG. 3) on the lower side.

Reference numeral 1 denotes four element conductors A1, A of the upper phase.
2, an upper inter-conductor spacer frame for maintaining a horizontal interval between upper two conductors A1, A2 at a predetermined interval among A3, A4, and 2 is a horizontal interval between lower two conductors A3, A4. Is a lower inter-element-spacer spacer frame that holds a predetermined distance. The upper and lower spacer frames 1 and 2 are attached to the upper and lower ends of a vertically-spaced connecting rod 3 using a cylindrical flange.

4 is a lower phase element conductor B1, B2, B
3 and B4, an upper inter-element spacer frame for maintaining a horizontal interval between upper two conductors B1 and B2 at a predetermined interval, and 5 for maintaining a horizontal interval between lower two conductors B3 and B4 at a predetermined interval. It is a lower inter-conductor spacer frame. The upper and lower inter-element spacer frames 4 and 5 are also attached to the upper and lower ends of a vertically-spaced connecting rod 6 using a cylindrical flange.

The upper inter-conductor spacer frame 1 and the lower inter-conductor spacer frame 2 of the upper phase conductor A,
The upper inter-conductor spacer frame 4 and the lower inter-conductor spacer frame 5 of the lower phase conductor B are connected to the upper and lower ends of the upper and lower spacing conductors 3 of the upper phase conductor A and the upper and lower ends of the lower phase conductor B, respectively. It is attached to the upper and lower ends of the spacing maintaining connecting rod 6 so as to be in the same vertical plane. However, in order to improve workability and the like, the attachment angle can be selected in the range of 0 ° ≦ θ ≦ 45 °.

The spacer frames 1 and 2 of the upper-phase conductor A and the spacer frames 4 and 5 of the lower-phase conductor B are formed of the interphase insulating spacer rod 7 made of a long trunk-like polymer insulator. Attach to both upper and lower ends. At both ends of the polymer insulator interphase insulating spacer rod 7, shield rings 8 are provided to alleviate the electric field and prevent the polymer insulator from being deteriorated by erosion or tracking. Reference numeral 9 denotes a flange adapter, which is attached to adjust the length to a predetermined length when the inter-phase distance is different from each other. The flange adapter 9 is interposed between the inter-phase insulating spacer rod 7 and the inter-conductor spacer frame 4 to form a frame. Attach with bolts 91.

The element conductors are respectively held at both ends of the spacer frames 1 and 2 of the upper-phase conductor A and the spacer frames 4 and 5 of the lower-phase conductor B. The electric wire holding clamp 10 to be mounted is attached. As shown in FIG. 2, the electric wire gripping clamp 10 has a cylindrical casing type clamp holding tube portion 11 provided by welding or the like at each end of each inter-conductor spacer frame 1, 2, 4, 5. The lower end 25 of the clamp portion 31 is rotatably held. The clamp holding cylinder 11 has an opening 12 at the lower end of the cylinder, and a center hole 14 is provided in a locking ring 13 on the inner periphery of the upper end of the cylinder.

An eyebolt 20 is rotatably supported inside the clamp holding tube portion 11. The eyebolt 20 has a flange 15 at an intermediate portion, a bolt portion 17 at a lower end of a lower half 16, and a lateral hole 19 at an upper end of an upper half 18. The lower half 16 of the eyebolt 20 is inserted into the holding cylinder 11 from the center hole 14 at the upper end of the clamp holding cylinder 11, and the lower half 16 of the eyebolt in the clamp holding cylinder 11 is inserted into the lower half 16 of the clamp holding cylinder 11. A connecting spring 21 is inserted from the lower end opening 12, a washer 22 is fitted to a bolt portion 17 at the lower end of the eyebolt protruding from the lower end opening 12, a grooved nut 23 is screwed into the bolt portion 17, and the connecting spring 21 is prevented from coming off by a split pin 24. Of the eyebolt lower half 16 by holding down the lower end of the eyebolt and tightening the connecting spring 21 between the locking ring 13 at the upper end of the clamp holding cylinder 11.
Resiliently hold within. Thus, the clamp holding cylinder 1
Eyebolt 20 with lower half 16 elastically held within 1
Is rotatable in a horizontal plane, which is a plane parallel to the electric wire direction, with the eyebolt axis as a vertical axis in the clamp holding tube portion 11.

A clamp portion 31 of the wire gripping clamp 10 is attached to the upper end of the eyebolt 20 so as to be movable in the wire direction. This attachment is performed by attaching the lower end 2 of the clamp 31 to the upper end of the upper half 18 of the eyebolt 20.
5, a connecting horizontal bolt 28 is inserted into a horizontal hole 27 of the lower end 25 of the clamp portion and a horizontal hole 19 of the upper half portion 18 of the eyebolt.
8 is interposed between the head of the bolt and the side of the upper half 18 of the eyebolt in the enlarged lateral hole 27 in the half of the lower end 25 of the clamp part, and fastened to the tip of the connecting lateral bolt 28. The lower end 25 of the clamp portion 31 is attached to the upper end of the eyebolt 20 by screwing the attached nut 29 and stopping it with the split pin 29 ′.

As described above, the wire gripping clamp 10 is
Clamp holding tube part 1 at the end of spacer frame between element conductors
The structure of the connecting part which is rotatably connected in a horizontal plane parallel to the electric wire direction with the eyebolt 20 elastically supported by the connecting spring 21 in the vertical direction as a vertical axis in the spacer frame 1, 2, 4, Wire gripping clamp 1 for 5
The horizontal plane rotation connection part 30 of 0 is comprised. The flange portion 15, lower half portion 16, bolt portion 17, and washer 22, grooved nut 23, split pin 24, and the like of the eyebolt 20 constitute details of the horizontal rotation connecting portion 30.

The clamp 31 having the clamp lower end 25 attached to the upper end of the eyebolt 20 is rotatable in a vertical plane with the connecting lateral bolt 28 as a horizontal axis, that is, rotatable in the electric wire direction. As described above, the connection between the upper half portion 18 of the eyebolt 20 and the lower end portion 25 of the clamp portion, in which the wire gripping clamp 10 is rotatably connected in the wire direction in the vertical plane, is formed by the spacer frames 1, 2, The electric wire gripping clamp 10 with respect to 4 and 5 constitutes the electric wire direction rotating connecting portion 40. Eyebolt upper half 18
The horizontal hole 19, the intermediate groove 26 of the clamp lower end 25, the horizontal hole 27, the tightening nut 29 of the connecting horizontal bolt 28, the split pin 29 ', the soundproof spring 32, etc.
Make up the details.

As shown in FIG. 2, the clamp portion 31 of the electric wire gripping clamp 10 is connected to an upper half portion 33 of the electric wire holding portion 35 by a hinge pin 34 so as to be openable and closable. A T-bolt 36 is inserted into the upper half 33 from the part, a tightening spring 41 is fitted from the tip of the T-bolt 36, a flat washer 37 and a cam 38 are fitted to the T-bolt tip and fixed with rivets 39. Thereby, the electric wire is gripped between the electric wire gripping concave portion 42 inside the upper half portion 33 of the clamp portion 31 and the electric wire gripping concave portion 43 inside the electric wire pressing portion 35. FIG. 2 shows a state in which the outer periphery around which the armor rod D is wound around the electric wire C is clamped between the electric wire holding concave portions 42 and 43.

The electric wire gripping clamp 1 configured as described above
Numeral 0 denotes a frame between the upper-phase conductor A and the lower-phase conductor B provided at both ends of the long trunk-shaped polymer insulator interphase insulating spacer rod 7 as shown in FIG. Attached to the clamp holding cylinders 11 provided at both ends of each of the inter-conductor spacer frames 4 and 5 so as to be rotatable in a horizontal plane parallel to the wire direction as described above, and to be rotatable in the wire direction. By coupling, the inter-phase spacer mounting device of the multi-conductor power transmission line of the present invention is configured. Each of the element conductors A1, A of the upper phase of the four-conductor power transmission line is clamped by the electric wire gripping clamps 10 of the element conductor spacer frames at the upper and lower ends of the interphase spacer.
2, A3, A4 and each elementary conductor B1, B2, B of the lower phase
3. Hold B4. FIG. 3 shows a state in which the interphase spacer of the present invention is installed between the element conductors of the upper phase and the element conductors of the lower phase of the four-conductor power transmission line as viewed at right angles to the line direction. , D are preformed armor rods wound around each element conductor, and each element conductor is gripped by the wire gripping clamp 10 from the outer periphery of the armor rod D.

As described above, the interphase spacer according to the present invention mounted on the multiconductor power transmission line is such that the electric wire gripping clamp 10 can be moved with respect to the interelement conductor spacer frame even if each elementary conductor moves individually in the line direction. The wire-direction rotating connection part 40 can individually follow and rotate in the wire direction.
Also, even if each of the element conductors moves in the line direction in opposite phases and a torsional moment is applied to the interphase spacer, or even if a horizontal rotational movement occurs at the time of subspan galloping,
Since the individual electric wire gripping clamps 10 gripping the respective element conductors are rotatably connected to the spacer frame between the element conductors in the horizontal plane by the horizontal plane rotation connecting portions 30, respectively, the polymer insulator interphase insulating spacer rods. 7 can be freely followed without being twisted.

Connection in the horizontal plane rotation connection part 30
The spring 21 is a conductor held by the wire holding clamp 10.
Of the connecting spring 21 when a galloping vibration occurs
Each part elastically follows by force. In addition, rotating movement in the track direction
To the clamp due to the expansion and contraction of the connecting spring 21
Various acting vibration stresses are reduced.

As described above, when the spacing between the element conductors to which the inter-phase spacers are attached is narrow, it is not easy to attach the electric wire gripping clamps 10 at both ends of the inter-element spacer frame, and therefore, as shown in the plan view of FIG. 4 and the schematic view of FIG. Then, the inter-element spacer frames of the inter-phase spacer are crossed in an X shape at a crossing angle θ and attached to a four-conductor power transmission line. In a normal case in which the element conductors have a sufficient distance, they are mounted orthogonally between adjacent element conductors, for example, A1 and A2 in a horizontal plane without intersecting in this manner.

The embodiment shown in FIG. 6 is a second embodiment of the present invention, and the same reference numerals as those in FIGS. 1 to 3 indicate the same parts.
FIG. 6 shows only the upper half of the interphase spacer of the component holding the four conductors A (A in FIGS. 1 and 3) of the upper phase, and the lower half of the symmetrical shape is not shown. is there. In the second embodiment, the electric wire gripping clamps 10-1 and 10-2 for gripping the upper two conductors A1 and A2 of the upper phase element conductors A1, A2, A3 and A4 are formed by the upper element conductor spacers. An electric wire gripping clamp 10-that attaches the clamp portion 31 downward to both ends of the frame 1 and grips the lower two conductors A3 and A4.
3 and 10-4, wire clamps 10-1 and 10- at both ends of the upper inter-conductor spacer frame 1 by attaching the clamp portions 31 upward to both ends of the lower inter-conductor spacer frame 2. 2 each clamp part 31-
1 and 31-2 and each of the clamp portions 31-3 and 31-4 of the wire gripping clamps 10-3 and 10-4 at both ends of the lower inter-conductor spacer frame 2 have four conductors A1 and A, respectively.
It is attached so as to face the center between 2, A3 and A4.

Each of the electric wire gripping clamps 10-1 and 10-1
2, 10-3, and 10-4, the wire gripping clamp 10 is moved in the wire direction with respect to the spacer frame between the element conductors by the horizontal rotating connection portion 30 having the same structure as that shown in FIG. A wire-direction rotating connecting portion 4 rotatably connected in a parallel horizontal plane and having the same configuration as that shown in FIG.
By 0, it connects so that rotation is possible in the direction of an electric wire. Each wire gripping clamp for gripping the lower phase conductor B (B in FIGS. 1 and 3) of the lower half of the interphase spacer (not shown) is configured in the same manner as described above.

In the second embodiment in which the electric wire gripping clamps 10 are attached to the upper inter-element spacer frame 1 and the lower inter-element spacer frame 2 as described above,
In the event of an interphase short-circuit accident, the wire gripping clamps 10-1, 10-2, 10-3, and 10-4 pull in the tensile direction against the impact force caused by the application of the compressive load P in the centripetal direction indicated by the chain line. , And an uneven load is not received unlike the arrangement shown in FIG. 1, so that the clamp design can be simplified. Although the embodiment shown in FIG. 6 shows the case of a four-conductor power transmission line, the present invention is not limited to this and can be applied to other multi-conductor power lines such as a six-conductor power line.

Each of the above embodiments is an embodiment in which the interphase spacer mounting device of the present invention is applied to a four-conductor power transmission line. The multiphase power transmission line interphase spacer mounting device of the present invention is applied to the four-conductor power transmission line. The present invention is not limited to this, and can be applied to other multiconductor transmission lines.

[0035]

As described above, the inter-phase spacer mounting apparatus for a multi-conductor power transmission line according to the present invention connects a wire holding clamp to the end of the inter-conductor spacer frame so as to be rotatable in the direction of the wire, and in a horizontal plane. Pivotably connected , and
In the clamp holding cylinder at the horizontal plane rotation connection
If you connect the eyebolt that supports the lower end of the wire gripping clamp,
Because of the elastic support of the wire, the wire gripping clamp can follow the line movement of each element conductor in the line direction, and the line movement of each element conductor is twisted by the interphase spacer in the opposite phase. It can follow freely even when a turning moment is applied , and it can follow elastically with the elasticity of the connecting spring.
And the extension of the connecting spring against the rotational movement in the track direction.
Various vibration stresses acting on the clamp due to compression
Therefore, unreasonable torsional stress is not applied to the interphase insulating spacer rod.

[Brief description of the drawings]

FIG. 1 is a view of a mounting state of one embodiment of the present invention as viewed in a line direction.

FIG. 2 is a view showing an electric wire gripping clamp according to one embodiment of the present invention.

FIG. 3 is a diagram showing a mounting state of one embodiment of the present invention as viewed in a direction perpendicular to a track.

FIG. 4 is a plan view of an example of a mounted state according to an embodiment of the present invention.

FIG. 5 is a schematic view of an example of a mounted state according to an embodiment of the present invention.

FIG. 6 is a diagram showing a second embodiment of the present invention.

[Explanation of symbols]

1, 2, 4, 5: Spacer frame between elementary conductors 7: Interphase insulating spacer rod 10: Electric wire gripping clamp 20: Eye bolt 21: Connection spring 30: Horizontal plane rotation connection part 31: Clamp part 40: Electric wire direction rotation connection part A1, A2, A3, A4, B1, B2, B3, B4: elementary conductor

Continued on the front page (72) Inventor Takeo Munakata 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (72) Inventor Nozomi Fukuda 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. In-house (56) References JP-A 51-121797 (JP, U) JP-A 6-44331 (JP, U) JP-A 59-18525 (JP, U) JP-A 58-100427 (JP, U) ) Tokiko Sho 45-7899 (JP, B1) Tokuji Sho 41-20690 (JP, Y1) Tokuji Sho 43-29898 (JP, Y1) Tokuji Sho 42-4276 (JP, Y1) (58) Field (Int.Cl. ⁶ , DB name) H02G 7/00-7/22

Claims (1)

(57) [Claims] 1. A provided containing between conductors spacer frame to hold the element conductor spacing of the multi-conductor transmission line at both ends of the interphase insulating spacer rods, horizontal at each end of the element conductor between the spacer frame
An electric wire is gripped inside the clamp holding tube at the surface rotation connection.
Press the eyebolt supporting the lower end of the clamp
By forcefully supporting the wire grip clamp
The eyebolt is connected rotatably in a plane, and
The wire grip at the upper end of the wire
An inter- phase spacer mounting device for a multi-conductor power transmission line, characterized in that a holding clamp is rotatably connected in the direction of the electric wire .