JPH0237232Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jumper device suitable for tension towers with large horizontal angles.

BACKGROUND ART In recent years, as power transmission capacity has increased, the transmission voltage has become increasingly high and the number of conductors has increased, and as a result, insulator devices have become larger.

Furthermore, due to geographical conditions, land acquisition issues, and other reasons, it is unavoidable that the power transmission line route bends, so it is inevitable that tension towers will be frequently used as transmission line support towers. The jumpers are also getting larger.

The functions of this jumper include ensuring a sufficient ground insulation gap, suppressing the amount of lateral vibration, and moldability or workability of the jumper itself. A jumper device has been proposed.

Also, the two Vs attached to the tower arm
Although the device for suspending the jumper using an insulator device has excellent functionality, it has the problem of requiring a large number of insulator chains. In particular, ultra-high voltage insulator equipment is
There was a problem in that the number of insulators in the series was large, and the work of attaching the insulator series to the steel tower was extremely time-consuming.

The present invention was developed to solve the above-mentioned problems. It reduces the number of expensive insulator chains used, effectively suppresses vibration of the device, stabilizes the support function, and simplifies installation work. The object of the present invention is to provide a jumper device that can reduce labor.

In other words, in the present invention, the three mounting positions for attaching the three sets of insulator chains to the steel tower arm are arranged in a substantially triangular shape on a plane, and the insulator chains are suspended from each of the mounting positions. This is a jumper device in which a long columnar rigid weight is connected to the lower end by a bridge, and a jumper is attached to the rigid weight.

Embodiments of the present invention will be described below with reference to the drawings.
In the figure, 1 is a steel tower, 2 is a steel tower arm, 3 is a tension-resistant insulator chain with one end connected to this arm 2, 4 is a power transmission line stretched at the other end of this insulator chain 3, and 5 is a link between these power lines 4. Jumper wires 6 connecting these jumper wires 5 are jumper spacers interposed between these jumper wires 5.

In the present invention, as shown in FIGS. 1 to 5, the upper end portions of the insulator chains 8 are attached to both sides of the tip of the tower arm 2 via ground metal fittings 7, and the tower body of the tower arm 2 is Attach the upper end of the insulator chain 8 through the base metal fittings 7 approximately in the center of the base of the insulator 1, and attach these three attachment positions A, B, and C in a planar manner as shown in Fig. 3. Arrange in approximately triangular shape. The lower ends of the three sets of insulator chains 8 are connected to a long column-shaped rigid weight 10 via the jumper side connecting fittings 9, and the rigid weight 1 is connected to each other.
0 is horizontally bridged below the steel tower arm 2. In other words, the insulator chain 8 attached to the approximate center of the base of the tower arm 2 with the tower body 1 is the rigid weight 1.
0 by an inclination angle β as shown in FIG. With respect to the longitudinal direction of the rigid weight 10, the legs are opened by an inclination angle γ as shown in FIG. 2, and the jumper side connecting fittings 9 and the rigid weight 10 are shown in FIGS. 4 and 5. A joint fitting 1 protruding from a rigid weight 10 as shown in FIG.
1 to allow slight rotation in the lateral direction (direction of moving toward and away from the tower body side) and the longitudinal direction (direction of lateral movement substantially parallel to the tower body side). This helps alleviate internal stress generated in the insulator chain 8 and the like.

Incidentally, the inclination angles α, β, and γ are set so that a substantially equal load is applied to the insulator chain 8 under normal conditions.

Further, as shown in detail in FIGS. 4 and 5, clamp support plates 12 are fixed to both sides of the rigid weight 10, and jumper clamps 13 formed at both ends of the clamp support plates 12 provide resistance. The jumper wire 6 hanging down from the tensioned insulator device 3 is grasped.

The rigid weight 10 has an outer shell made of a rectangular steel pipe 10a, and is filled with concrete 10b and hardened during construction on site.

In the figure, 14 is a shield ring provided on the insulator chain 8, 15 is a jumper horn provided on the rigid weight 10, and 16 is a ground side horn provided on the tower arm 2.

Furthermore, in the above embodiment, in order to suppress the vertical vibration of the jumper device, the insulator chains 8, 8 attached to both sides of the tip of the steel tower arm 2 are spread apart at an appropriate inclination angle γ with respect to the longitudinal direction of the rigid weight 10. In addition, the vertical swing of the jumper device can be suppressed by closing the legs at an appropriate inclination angle γ. Note that if it is not necessary to suppress vertical vibration of the jumper device, it may be installed vertically.

FIG. 6 shows another embodiment of the present invention, in which one set of insulators 8 is attached to the tip of the tower arm 2, and two sets of insulators are attached on both sides of the base of the tower arm 2 to the tower body 1. The insulator chain 8 is attached, and each attachment position is arranged in a substantially triangular shape in plan view, and the other configuration is the same as that of the previous embodiment. In the figure, the same reference numerals as those mentioned above indicate equivalent parts.

7 and 8 show still another embodiment of the present invention, in which the same reference numerals as those described above indicate equivalent parts. This uses a pipe jumper 17, and this pipe jumper 17 is
It is clamped by a pipe clamp 19 rotatably connected via a hinge joint 18 attached to a rigid weight 10.

Note that the crossover wire 20 in FIG. 7 provides electrical connection between the pipe jumper 17 and the power transmission line 4.

The present invention uses a rigid weight 1 configured as described above.
Since the jumper is attached to the 0, horizontal vibration of the jumper can be effectively prevented by the gravitational effect of the rigid weight 10. In addition, the three mounting positions for attaching the insulator chains to the tower arm are arranged in a substantially triangular shape on a plane, and each insulator chain is suspended from the mounting portion at an appropriate angle. Since a long column-shaped rigid weight is bridged and connected to the lower end of the , the vibration of the rigid weight is suppressed and the support function is stabilized. Therefore, the device of the present invention not only has the function of a device for suspending a jumper using two conventional V-suspended insulators, but also has the effect that the number of insulator chains used is small and the work of attaching the insulator chains to the steel tower is simple and easy. Therefore, the present invention has the effect of contributing to the development of industry.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the jumper device of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a composite view taken from the X and Y arrows of Fig. 3, and Fig. 5 is a FIG. 6 is a perspective view showing another embodiment of the present invention, FIG. 7 is also a perspective view showing another embodiment, and FIG. 8 is a main part thereof. It is a diagram. 1... Steel tower, 2... Steel tower arm, 3... Tensile insulator chain, 4... Power transmission line, 5... Jumper wire, 6...
...Jumper spacer, 7... Bottom metal fittings, 8...
...Insulator chain, 9...Jumper side connection fittings, 10
... Rigid weight, 11 ... Joint fitting, 12 ... Clamp support plate, 13 ... Jumper clamp, 14
... Shield ring, 15 ... Jumper horn, 16 ... Earth side horn, 17 ... Pipe jumper, 18 ... Hinge joint, 19 ... Pipe clamp, 20 ... Crossing wire.

Claims (1)

[Scope of utility model registration request] The three mounting positions for attaching the three sets of insulators to the steel tower arm are arranged in a planar approximately triangular shape,
This jumper device comprises a series of insulators suspended from each mounting position, a rigid weight in the form of a long column being bridged to connect the lower end of each series of insulators, and a jumper attached to the rigid mass.