JPH0623149Y2 - Contact prevention spacer for jumper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a contact prevention spacer used for a jumper device in a high-voltage power transmission line.

[Conventional technology]

In the multi-conductor jumper device for an extra-high voltage power transmission line, the detention clamp of the power line is connected to the yoke fitting of the insulator series via the rod connected to the power line, and the jumper wire is pulled out downward from the detention clamp. In this case, the jumper wire pulled out from the upper power line retention clamp is
Pass near the bottom rod. Therefore, conventionally, a contact prevention spacer is interposed between the jumper wire and the rod to prevent the contact between them.

As shown in FIG. 9, a conventional contact prevention spacer includes a rod clamp 2 attached to a rod 21 of a tension clamp, and a jumper wire clamp attached to a jumper wire 26 drawn out from a tension clamp of an upper wire or a middle upper wire. 4 and both are connected by a connecting plate 5. Connection plate 5
Is made of an L-shaped metal plate having an upper piece portion 6 and a lower piece portion 7, and is provided with one bent portion 8 in which the lower piece portion 7 is bent at 90 degrees along a vertical bending line. The tip of the upper piece portion 6 of the connecting plate 5 is inserted between a pair of opposing connecting pieces 10 provided on the receiving member 9 of the rod clamp 2, and is a first connecting body that is orthogonal to the rod 21 and is inserted in the horizontal direction. It is flexibly connected by a pin 11. Further, a pressing member 13 is attached to the receiving member 9 by a pin 12 parallel to the rod 21 and holds the rod 21 between them.

On the other hand, the tip of the lower piece portion 7 of the connecting plate 5 is inserted between the pair of facing connecting pieces 15 provided on the receiving member 14 of the jumper wire clamp 4, and is inserted perpendicularly to the jumper wire 26 and in the horizontal direction. It is flexibly connected by the second connecting pin 16. Further, a pressing member 18 is attached to the receiving member 14 by a pin 17 parallel to the jumper wire 26, and holds the jumper wire 26 between them.

The contact-preventing spacer having the above structure keeps the distance between the rod 21 and the jumper wire 26 constant and prevents the contact.
Further, the relative rotation around the first connecting pin 11 causes the inclination of the jumper wire 26 with respect to the rod 21 to follow, and the relative rotation around the second connecting pin 16 causes the inclination of the jumper wire 26 to change to the jumper wire clamp 4 Is designed to follow.

[Problems to be solved by the device]

When the vibration due to the inter-galloping of the transmission line is transmitted to the jumper device provided with the spacer as described above, the jumper wire clamp 4 for the jumper wire and the jumper wire 26 at each mouth of the upper wire retention clamp 22 (see tenth) are greatly affected. There is a problem that stress is generated and the strand breaks.

This problem will be described in detail based on the schematic diagrams of FIGS. 10 and 11.

In FIG. 10, 19 is a series of insulators, 20 is a yoke fitting, 2
Reference numeral 1 is a rod, 22 is a detention clamp, 23 is a main wire, 26 is a jumper wire, and 27 is a contact prevention spacer shown in FIG.

FIG. 11 is a further simplification of the above-mentioned configuration. The mounting position of the upper wire rod 21 to the yoke fitting 20 is a, the jumper wire 26 is pulled out position b, and the lower wire rod 2 is shown.
The mounting position of No. 1 with respect to the yoke fitting 20 is shown by c, and the position of the contact spacer 27 is shown by d. Further, the pull-down angle of the jumper wire 26 with respect to the rod 21 is indicated by θ. The solid line in this figure indicates upward vibration when vertical vibration occurs on the main line 23, and the dashed-dotted line indicates downward vibration. Reference numerals b'and d'represent the positions of b and d during downward vibration.

In this case, the pull-down angle θ of the jumper wire 26 is constant regardless of the vertical vibration due to the structure of the pull clamp 22. Therefore, assuming that the contact prevention spacer 27 does not exist and the jumper wire 26 is not restrained by the underwire rod 21 at all, the jumper wire 26 and the underwire rod 21 are oscillated during downward vibration.
The point where and intersect is at the position of d ″ in the figure as shown by the dotted line, and the pulling-down angle holds θ. However, in practice, the contact prevention spacer 27 causes the jumper wire 16 and the rod 21 to move.
Since and are constrained by d ′, the pull-down angle of the jumper wire 26 becomes an angle θ ′ larger than θ.

Since the pull-down angle of the jumper wire 26 is constant due to the structure, the fact that the pull-down angle is an angle θ ′ larger than θ means that excessive stress is generated in the jumper wire 26 at the mouth of the jumper wire clamp 4. Means that.

In order to prevent the above-mentioned stress from acting on the jumper wire 26, the jumper wire clamp 4 of the contact prevention spacer 27 moves to the position of d ″ at the time of downward vibration, and the clamp 4 moves with the movement. It may be rotated with respect to the jumper wire 26.

In the conventional contact prevention spacer, the connecting plate 5 can rotate around the first connecting pin 11 by a required angle, but the second connecting pin 16 is inserted in the direction orthogonal to the jumper wire 3.
As a result, since the rotation surface around the first connecting pin 11 and the rotation surface around the second connecting pin 16 are orthogonal to each other, the jumper wire clamp 4 cannot be smoothly moved to the position of d ″. .

Therefore, in this invention, the bent shape of the connecting plate is modified so that the directions of the first connecting pin and the second connecting pin are aligned with each other so that the jumper wire clamp can be smoothly moved to the position of d ″. The purpose is to reduce the excessive stress acting on the jumper wire due to the effect of galloping vibration.

[Means for Solving the Problems]

To achieve the above object, the present invention provides a rod clamp and a jumper wire in a contact preventive spacer for a jumper device interposed between a rod of a draw clamp and a jumper wire drawn downward from the draw clamp. The connecting plate interposed between the work clamp and the clamp is formed by an L-shaped metal plate including an upper piece and a lower piece, and a bent portion bent at 90 degrees along the vertical bending line is formed on the lower piece. The upper end of the connecting plate is connected to the clamp for the rod flexibly by a first connecting pin which is orthogonal to the rod and is inserted in the horizontal direction, and the lower end of the connecting plate is connected to the first connecting pin. The configuration is such that the jumper wire clamp is flexibly connected by the second parallel connecting pin.

[Action]

When the jumper device vibrates vertically due to the occurrence of spanning gear roping, the connecting plate swings around the first connecting pin, and the jumper wire clamp is clamped to the connecting plate in a plane parallel to the swinging surface. Swings. As a result, the jumper wire clamp moves to the eleventh position d ″.

〔Example〕

FIG. 1 is an example of a jumper device, and the same parts as those described above with reference to FIG. 10 are designated by the same reference numerals. That is, 19 is an insulator string, 20 is a yoke fitting, 21 is a rod, 2
2 is a detention clamp, 23 is a main line, 26 is a jumper line, 2
Reference numerals 8 and 29 are contact prevention spacers according to the embodiment.

FIG. 2 shows the usage state of the contact prevention spacer 28 for the jumper wire for the middle upper line, and FIG. 3 shows the details thereof. This contact prevention spacer 28 has a structure in which the rod clamp 2 and the jumper wire clamp 4 are connected to each other by a connecting plate 5 as in the conventional case.

Since the rod clamp 2 and the jumper wire clamp 4 are the same as in the conventional case described above (see FIG. 9), the same parts are designated by the same reference numerals and the description thereof will be omitted.

The difference from the conventional case is that the connecting piece 15 of the jumper wire clamp 4 is parallel to the connecting piece 10 of the rod clan 2 and is configured to open vertically and laterally. And the insertion direction of the second connecting pin 16.

That is, the connecting plate 5 is formed of an L-shaped metal plate including the upper piece portion 6 and the lower piece portion 7, but the lower plate portion 7 is formed in the same direction by 90 °.
Bending is performed twice at a time, and bending portions 8 having vertical bending lines are provided at two locations. Therefore, the upper piece 6
Is parallel to the tip of the lower piece 7. Upper piece 6
Similar to the conventional case, the upper end of the is connected to the rod clamp 2 by a first connecting pin 11 which is orthogonal to the rod 21 and inserted in the horizontal direction so as to be bendable. The tip of the lower piece portion 7 is inserted into the above-mentioned open portion formed by the connecting piece 15 of the jumper wire clamp 4, and the first connecting pin 11 is inserted.
It is flexibly connected by a second connecting pin 16 (see FIG. 4) which is parallel to.

Next, FIG. 5 shows the usage state of the contact spacer 29 of the jumper wire for the upper wire, and FIG. 6 shows the details thereof.

In this case, the 90-degree bent portions 8, 8 formed at the two places of the lower piece portion 7 of the connecting plate 5 are bent in the opposite directions, and the tips thereof are formed by the second connecting pin 16 in the same direction as in the case described above. It is connected to the connecting piece 15 of the jumper wire clamp 4. Also, the upper piece 6
At the upper end of the first connecting pin 1 parallel to the second connecting pin 16
The link plate 30 is connected by 1 and the upper end of the link plate 30 is connected to the connecting piece 10 of the rod clamp 2 by the third connecting pin 31 parallel to the first connecting pin 11.

By using the link plate 30 and the third connecting pin 31,
The flexibility of bending is further increased.

FIG. 7 shows another embodiment of the contact prevention spacer 29 for the upper jumper wire, in this case, the upper piece 6 of the connecting plate 5.
The middle of the link plate 32 connected to
Bend to 0 degrees and make the tip of the third connecting pin 33 in the vertical direction.
It is connected to the rod clamp 2 by (see FIG. 8). Also in this case, the degree of freedom of bending is increased by the third connecting pin 33.

In any of the above-mentioned embodiments, when the jumper device vibrates in the vertical direction due to the occurrence of spanning galloping, the connecting plate 5 swings about the first connecting pin 11, and within a plane parallel to the swinging surface. The jumper wire clamp 4 swings around the second connecting pin 16. As a result, the jumper wire clamp 4 moves to the position of d ″ in FIG.

Although the second connecting pin 16 is inserted in a direction orthogonal to the first connecting pin 11 in order to follow the inclination of the jumper wire 26 (see FIG. 9), in the case of the present invention, the connecting in this direction is performed. There are no pins. Therefore, with respect to the inclination of the jumper wire 26, the first connection pin 11 and the second connection pin 16 or the third connection pin 16
The connection pins 31 and 33 are absorbed within the range of backlash.

[Effect of device]

As described above, according to the present invention, two 90-degree bent portions are provided in the lower piece of the L-shaped connecting plate, and both ends of the connecting plate are parallel to the rod clamp and the jumper wire clamp, respectively. Since it is flexibly connected by the connecting pin and the second connecting pin, it can reasonably follow the vertical vibration when span gear roping occurs, and can generate excessive stress on the jumper wire. Can be prevented.

[Brief description of drawings]

1 is a front view of a jumper device, FIG. 2 is an enlarged cross-sectional view of a middle-upper jumper wire portion of the same, FIG. 3 is a perspective view of a contact prevention spacer in the case of FIG. 2, and FIG. 4 is FIG. 5 is a plan view of a clamp portion for a jumper wire of FIG. 5, FIG. 5 is an enlarged sectional view of an upper jumper wire portion, FIG. 6 is a perspective view of a contact preventing spacer in the case of FIG. 5, and FIG. 7 is a case of FIG. FIG. 8 is a perspective view of another contact-preventing spacer, FIG. 8 is a front view of the rod clamp portion in the case of FIG. 7, FIG. 9 is a perspective view of a conventional contact-preventing spacer, and FIGS. It is a schematic diagram for explaining a problem. 2 ... Rod clamp, 4 ... Jumper wire clamp, 5 ... Connecting plate, 6 ... Upper piece, 7 ... Lower piece, 8 ... Bend, 10 ... Connecting piece, 11 ... 1st connection pin, 16 ... 2nd connection pin, 21 ... Rod, 26 ... Jumper wire.

Claims (1)

[Scope of utility model registration request] 1. A contact preventive spacer for a jumper device interposed between a rod of a tension clamp and a jumper wire drawn downward from the tension clamp, wherein the spacer is interposed between the rod clamp and the jumper wire clamp. The connecting plate is formed of an L-shaped metal plate composed of an upper piece and a lower piece, and the lower piece has two bent portions bent at 90 degrees along the vertical bending line. The tip of the upper piece is connected to the rod clamp flexibly by the first connecting pin which is orthogonal to the rod and is inserted in the horizontal direction, and the tip of the lower piece of the connecting plate is connected by the second connecting pin parallel to the first connecting pin. A contact prevention spacer for a jumper device, which is flexibly connected to a jumper wire clamp.