JP6018862B2 - Support structure for electric power equipment, plate plate replacement method, and support insulator replacement method - Google Patents

Description

The present invention relates to a support structure that supports a relatively large power device (see the following patent document) that must be supported through a plurality of insulators such as an air end box.

For example, an air termination box is generally used as an underground cable terminal treatment material when newly installing an underground transmission line (see Patent Documents 1 and 2 below). This air termination box is a relatively large power device weighing 300 kg and having a height of 1.5 m. The center box is spaced around the center so that it does not interfere with underground transmission lines. It is supported via a plurality of evenly arranged insulators. Conventionally, the supporting insulator is supported by the steel mounting plate with a hole underground transmission lines passes the center, the mounting plate, its periphery to a frame of steel or the like is supported.

JP-A-10-233133 JP-A-10-262323 JP 2009-026657 A

Under the structure, when the rust of the metal portion near the support insulator and the mounting plate progresses every time the service period is used, it is naturally necessary to replace the support insulator and the mounting plate.
However, in order to replace the support insulator and the mounting plate, all bolts for fixing the air end box must be loosened and the air end box must be lifted.

  For example, as a specific method for exchanging the support insulator, (1) all bolts for fixing the air end box are loosened. (2) Remove the cleat for fixing the underground cable. (3) The air termination box is floated in the air more than a dozen cm from the mounting plate. (4) Replacement of support insulators. (5) Replace the underground terminal box. (6) Connect the underground cable fixing cleat. (See FIG. 4).

  Thus, in order to exchange them, a comparatively large-scale operation | work which requires a comparatively large-scale tool is forced (for example, refer FIG. 5). In addition, if the air termination box is suspended in the air, an unreasonable load is applied to the underground cable (see FIGS. 4B and 4C), and the underground cable itself and the air terminal to which it is connected are connected. The box will be adversely affected. For this reason, the underground cable must be carefully lifted while maintaining a minimum bending radius.

The present invention has been made in view of the above circumstances, and does not undergo extensive work and does not adversely affect cables and the like connected to the power equipment, with relatively simple work. The object is to provide a support structure for electric power equipment having a structure in which the support insulator and the mounting plate can be exchanged.

A power device support structure according to the present invention made to solve the above-described problems includes a plurality of support insulators that support the power device to which the wiring is connected, and a mounting plate that supports the power device via the support insulator, mounting plate, which connects the pair of half-shaped plate pieces, as well as constitute a support base for fixing the plurality of support碍element in the peripheral portion, constitute the openings for passing the wire in the central portion In this case, one support insulator is fixed to one half-shaped plate piece .
The support base includes a hole through which each support insulator passes, and a support plate that seals the hole. The support plate includes a stage that fits into the hole, and a flange that extends from a lower peripheral portion of the plate and adheres to the back surface of the plate piece. The stage has a thickness substantially equal to that of the plate piece, and has a support hole for fastening a fixing bolt of a support insulator at the center thereof.

In order to solve the above-mentioned problems, the plate piece replacement method in the power equipment support structure according to the present invention relates to all the support insulators fixed to one plate piece of the pair of half plate pieces. A step of releasing the equipment connecting bolt of the supporting insulator to be replaced, a step of releasing the supporting plate from the one plate piece, a step of removing the supporting insulator through the hole, and a step of removing the one plate piece, A step of fixing a new plate piece at a place where the one plate piece is fixed, a step of loading a support insulator and a support plate extracted through the hole, and a step of fastening the support plate to the plate piece; The device connecting bolt of the loaded support insulator is connected to a power device. When exchanging both plate pieces, the same process is repeated for the other plate piece.

In order to solve the above-described problems, a method for replacing a support insulator in a support structure for a power device according to the present invention includes a step of releasing a device connection bolt of the support insulator to be replaced, and a support plate is released from the plate piece. A step of removing a support insulator to be replaced through the hole, a step of removing the support insulator to be replaced from the support plate, a step of fixing a new support insulator to the support plate, and a new support through the hole. A step of loading an insulator and a support plate, a step of fastening the support plate to the plate piece, and a step of connecting a device connection bolt of the new support insulator to a power device are characterized.

As described above, according to the support structure for a power device according to the present invention, the plate piece or support insulator replacement method according to the present invention can be implemented.
As a result, when replacing the plate pieces constituting the mounting plate or the supporting insulators that support the power equipment such as the air end box, the fixing bolts and nuts are loosened without floating the power equipment. Alternatively, since it can be performed only with a simple tool such as a tightening wrench, workability can be improved, work time can be shortened, and work cost can be reduced.
In addition, there is no need to float the power device, and since an excessive force is not applied to the accessory member such as the underground cable, there is an advantage that damage to them can be prevented.

Shows an example of a mounting plate of the support structure of the power apparatus according to the invention (A): a plan view, (B): a plan view of the support plate, A-A arrow view and B-B arrow view, (C): It is a top view of the example of an embodiment. It is explanatory drawing which shows an example of the replacement | exchange method of the plate piece or support insulator in the support structure of the electric power equipment by this invention. It is explanatory drawing which shows an example of the replacement | exchange operation | work of the support insulator in the support structure of the electric power apparatus by this invention. It is explanatory drawing which shows an example of the replacement | exchange method of the plate piece or support insulator in the support structure of the conventional electric power apparatus. It is explanatory drawing which shows an example of the replacement | exchange condition of the plate piece or support insulator in the support structure of the conventional electric power apparatus. It is a process table which compared an example of the exchange operation | work of the support insulator in the support structure of this invention and the conventional electric power equipment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a power device support structure according to the present invention and a plate piece or support insulator replacement method in the power device support structure will be described with reference to the drawings.

FIG. 1 is an example of a mounting plate for a power equipment support structure according to the present invention, and a pair of half-shaped plate pieces 1 are connected to constitute a mounting plate P for an air end box.
The mounting plate P constitutes a support base for fixing the plurality of support insulators 2 to the peripheral edge portion, and constitutes an opening 3 for passing wiring through the center portion.

  In this example, a substantially square mounting plate P is configured by fixing a pair of rectangular plate pieces 1 having a rectangular shape to a support frame (see FIG. 1C or FIG. 2) FL. At the center of the substantially square mounting plate P, a substantially circular opening 3 is formed in which semicircular cutouts 1a and 1a provided on the nearest long side of the pair of plate pieces 1 and 1 face each other. .

In the mounting plate P consisting of a pair of half-shaped plate pieces 1, 1 like this mounting plate, each plate piece 1 has a support platform of 180 degrees around the opening 3. Consists of phase difference.
The mounting plate P in the example includes a circular hole 4 through which the support insulator 2 passes at a position equidistant from the center of the opening 3 every 90 degrees around the opening 3 and a support for sealing the hole 4. A plate 5 is provided (the arrangement and form of the holes 4 are adjusted to the fixing positions of the supporting members of the power equipment to be supported). In addition, in each plate piece 1 in the said example, it becomes a position corresponding to 45 degree | times and 135 degree | times by the phase of the semicircle shape which the said notch part 1a forms.

The support plate 5 includes a circular stage 5 a that fits into the hole 4 that protrudes by a thickness substantially equal to that of the plate piece 1, and a flange 5 b that extends from the lower periphery of the plate 5 and is fixed to the back surface of the plate piece 1.
The stage 5a is provided with a recess 5c on the back side thereof to adjust the thickness to be substantially equal to that of the plate piece 1, and has a support hole 5d for fastening a fixing bolt of the support insulator 2 at the center thereof. By adopting this structure, it is possible to ensure the same load-bearing capacity as each plate piece set to the minimum thickness that can withstand the load of the power equipment to be supported there without increasing the weight. 2 can be securely fixed to the stage 5a with the length of the fixing bolt 2a.

The flange 5b has the same thickness as the stage 5a and is provided in a substantially square shape with the stage 5a as the center, and one of the four corners extends along a line connecting the midpoints of two adjacent sides. And has a shape that can ensure the area of the opening 3 reliably.
The back surface of the plate piece 1 and the flange 5b are fixed by three fixing holes 1b provided around the circular hole 4 and fixing holes 5e, 5e, 5e provided at three corners of the flange 5b. By connecting with bolts and nuts (see Fig. 3).

<Plate piece replacement method>
According to the support structure of the electric power device , it is possible to replace the plate piece 1 through the following steps. Here, the air end box T is provided with a support leg FT that is open in all directions at the lower end, and an individual support insulator 2 is interposed between each support leg FT and the mounting plate P, and It is assumed that the air end box T is supported and the underground wiring L is pulled out from the center of the support leg FT opened in four directions through the opening 3 of the mounting plate P (see FIG. 2).

That is, the exchange method of the plate piece 1 is about all the support insulators 2 fixed to one plate piece 1 of the pair of half-shaped plate pieces 1, 1.
(1) A step (see FIG. 3 (A)) of releasing the device connecting bolt 2b (bolt connecting to a power device such as the air termination box T) 2b of the supporting insulator 2 to be replaced by removing the nut N1;
(2) A step of releasing the support plate 5 from the one plate piece 1 by removing the bolts and nuts BN (see FIG. 3B);
(3) A step of extracting the support insulator 2 together with the support plate 5 through the hole 4 (see FIG. 3C) is performed.
By removing the two support insulators 2 through the above operations, the bolts and nuts (not shown) connecting the air end box T and the plate piece 1 without changing the air end box T and other attached members. The plate piece 1 can be removed from the air end box T by removing the (omitted)
(4) removing the one plate piece 1;
(5) The plate piece 1 can be freely removed from the support frame FL and exchanged through the process of fixing the new plate piece 1 to the place where the one plate piece 1 is fixed.

After replacing one plate piece 1 in this way,
(6) a step of loading the support insulator 2 and the support plate 5 extracted through the hole 4 (see FIG. 3B);
(7) A step of fastening the support plate 5 to the plate piece using a bolt / nut BN (see FIG. 3A);
(8) After the step of connecting the device connecting bolt 2b of the loaded support insulator 2 to the air end box T, the replacement operation of the one plate piece 1 is completed by mounting the support insulator 2 as it is. .
By exchanging the other plate piece 1 through a series of steps (steps (1) to (8)), the replacement work for the entire mounting plate P is completed.

<How to replace the support insulator>
According to the support structure of the power device, a method for replacing the support insulator 2 through the following steps is possible. Here, in the same way as the method for exchanging the plate piece 1 above, the air end box T is provided with support legs FT that are open in all directions at the lower end, and individual support legs FT and mounting plates P are individually provided between the support legs FT. The support box 2 is interposed to support the air termination box T on the mounting plate P, and the underground wiring L is pulled out from the center of the support leg FT opened in four directions through the opening 3 of the mounting plate P. And

That is, the method for exchanging the supporting insulator 2 is as follows.
(1) A step (see FIG. 3 (A)) in which the device connecting bolt 2b of the supporting insulator 2 to be replaced is released by removing the nut N1;
(2) The step of releasing the support plate 5 from the plate piece 1 by removing the bolts and nuts BN (see FIG. 3B);
(3) extracting the support insulator 2 to be replaced through the hole 4 (see FIG. 3C);
(4) removing the support insulator 2 to be replaced from the support plate 5 by removing the nut N2 from the bolt (see FIG. 3D);
(5) fixing a new support insulator 2 to the support plate 5 with a nut N2,
(6) loading a new support insulator 2 and support plate 5 through the hole 4;
(7) a step of fastening the support plate 5 to the original plate piece 1 using bolts and nuts BN;
(8) The replacement operation of the support insulator 2 from the plate piece 1 is completed through a step of connecting the equipment connection bolt 2b of the new support insulator 2 to the air end box T (see FIG. 2 or FIG. 6). ).

According to the method for exchanging the plate piece 1 and the support insulator 2 using the support structure of the power equipment, the plate piece 1 constituting the mounting plate P can be exchanged or the support insulator 2 for supporting the air end box T can be exchanged. When the work is performed, the air termination box T can be carried out without being lifted. Therefore, the air termination box is not damaged at the high place as shown in FIG. A large-scale tool for lifting T is not required, and the work can be performed with relatively safe and easy work, and the convenience of maintenance of the power equipment is also improved.

P mounting plate,
T air termination box, FT support leg, L underground wiring, FL support frame,
N1, N2 Nut, BN Bolt / Nut 1 Plate piece, 1a Notch, 1b Fixing hole,
2 support insulator, 2a fixing bolt, 2b equipment connecting bolt,
3 openings, 4 holes,
5 support plate,
5a stage, 5b flange, 5c recess, 5d support hole, 5e fixing hole,

Claims (3)

A plurality of support insulators for supporting the power equipment to which the wiring is connected, and a mounting plate for supporting the power equipment via the support insulators,
It said mounting plate, which connects the pair of half-shaped plate pieces, as well as constituting a supporting base for fixing a plurality of support insulators on the peripheral portion, constitute the openings for passing the wire in the central portion And one support insulator is fixed to one half-shaped plate piece,
The support base includes a hole through which each support insulator passes and a support plate that seals the hole.
The support plate includes a stage that fits into the hole, and a flange that extends from a lower portion of the periphery thereof and is fixed to the back surface of the plate piece,
The stage has a thickness approximately equal to the plate piece, the support structure of the power device, characterized in that it comprises a support hole for fastening the fixing bolts of the support insulator in the center. For all supporting insulators fixed to one plate piece of the pair of half plate pieces,
Releasing the device connecting bolt of the supporting insulator to be replaced;
Releasing the support plate from the one plate piece;
Extracting the support insulator through the hole;
Removing the one plate piece;
A step of fixing a new plate piece in a place where the one plate piece was fixed;
Loading a support insulator and support plate extracted through the hole;
Fastening the support plate to the plate piece;
The method of replacing plate pieces in a support structure for a power device according to claim 1, wherein the device connecting bolt of the loaded support insulator is connected to a power device. Releasing the device connecting bolt of the supporting insulator to be replaced;
Releasing the support plate from the plate piece;
Extracting the support insulator to be exchanged through the hole;
Removing the support insulator to be replaced from the support plate;
Fixing a new support insulator to the support plate;
Loading a new support insulator and support plate through the hole;
Fastening the support plate to the plate piece;
2. The method for replacing a support insulator in a support structure for a power device according to claim 1, wherein a step of connecting the device connection bolt of the new support insulator to a power device is performed.

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