JPS5870508A - Supporting method of content of oil-filled electric apparatus - Google Patents

Abstract

PURPOSE:To easily and positively support the contents even when the contents being accommodated are plural ones or the like by a method wherein the sides of the contents are composed to mount on the internal wall of a case. CONSTITUTION:A pin 22 is faced upward and is previously projected and provided at the bumper 21 of an iron core fastening metal fitting fixed to the sides of the contents 20 of a transformer. Next, after accommodating the contents 20 of the transformer in the case 23 of the transformer, a hole 24 considered errors in outside diameter plus dimension of the pin 22 and a steady rest 26 having a mounting hole 25 for fixed bolt are inserted in the outside circumference of the pin 22 of the bumper 21 and the steady rest 26 is fixed to a seat 27 provided at the internal wall of the case 23 of the transformer by using a fixed bolt 28. Then, after applying drilling process for fixing bolt to a fixing plate 29, the fixing plate 29 is mounted on the pin 22 and is fixed to the steady rest 26 by a fixing bolt 30. This can easily and positively support the contents even when the contents being accommodated are plural ones or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a method for supporting the contents of oil-filled electrical equipment such as transformers.

(2) Prior Art -1- The contents of oil-filled electrical equipment, such as a transformer, must be supported against the transformer outer box so that it can withstand shocks during local transportation of the transformer and vibrations during operation. However, in that case, it is important how to absorb the dimensional errors between the transformer contents, the support, and the transformer outer box in the -E downward direction and in the horizontal direction.

For this reason, the following methods have been used to support the contents of the transformer.

First, as shown in Fig. 1, after storing the transformer contents 1 in the transformer outer box 2, the mounting holes provided on the surface of the L-shaped steady rest 3 in contact with the outer box 2 are made into vertical elliptical holes. It has a structure that can absorb dimensional errors in the vertical direction, and the steady rest 3 is installed with the screw hole of the seat 4 provided on the inner wall of the transformer outer box aligned with the oval hole.
Temporarily place it on Bamba 5. In addition, by copying the position of the steady rest mounting hole of the bumper 5 to the steady rest 3, horizontal dimensional errors can be absorbed, and after drilling the copied hole part of the steady rest 3, the steady rest can be adjusted again. By fixing the stopper 3 to the bumper 5 and the seat 4 on the inner wall of the transformer outer box with fixing bolts 6, the transformer contents 1 are supported from the transformer outer case 2 via the steady rest 2-. Ta.

Furthermore, as another method, a method as shown in FIG. 2 has been known in the past. That is, first, a metal fitting 10 is provided on the top cover 9 of the transformer, facing the bottle 8 that protrudes from the core fastening metal glue O base 7 provided above the iron core of the transformer 1; , a hole 11 that takes into account the outer diameter plus dimensional error of the bottle 8, and a screw hole 12 for the fixing bolt 6 are provided.

Then, the pin 8 protruding from the crossbar 7 of the iron core tightening fitting is inserted into the hole of the metal fitting 10, and then the pin 8 is inserted in advance.
The fixing plate 13 with a hole 14 that matches the outer diameter of the hole 1
4, the pin 8 is inserted into the bracket 10, and in this state, the position of the screw hole 12 of the fixing bolt 6 provided in the bracket 10 is copied onto the fixing plate 13. Fixed plate 1
After removing the receiver 3 from the metal fitting 10 and drilling a hole at the position of the copy hole, the fixing plate 13 is attached to the bone metal fitting 10 again and tightened with the fixing bolt 6. In this way, the vertical dimensional error between the transformer contents 1 and the transformer outer box 7 is corrected by the bin 8 and the receiver by the metal fitting 9, and the horizontal dimension error is corrected by the fixing plate 13 at the receiver by the metal fitting 9. I tried to absorb the problem by installing it and copying the fixing bolt position.

(3) Problems with the prior art However, when the number of transformer contents 1 stored in the outer box 2 of the transformer is plural as shown in FIG. 3, the conventional method shown in FIG. Drilling holes will increase the number of valves inside the transformer. This is because, with the method shown in Figure 1, the transformer top cover 9 cannot be attached to the transformer tank 2 until the steady rest 3 is installed, so the dry contents 1 of the transformer remain dry for a long time until the steady rest 3 is installed. exposed to the outside air.

As a result, the amount of moisture absorbed by the transformer contents and the chance of foreign matter getting into the transformer outer box increase, and furthermore, the installation of the LTCl 5 attached to the transformer top cover 9 is delayed, and the connection work of the transformer contents is delayed. This results in disadvantages such as:

In addition, according to the method shown in Fig. 2, when the heights of the contents of the transformer are different, the length of the metal fitting 10 or the bottle 8 of the lower transformer contents is longer than that of the higher transformer contents. Since it has to be extended and supported, the bending moment applied to the bracket 10 and the bin 8 becomes large when an earthquake occurs while the transformer is being transported to the site or during operation. Moreover, there is a drawback that manufacturing man-hours and materials are increased in order to manufacture an outer box strong enough to withstand this. In addition, when placing connection leads and bars on the top of the transformer,
There was also a risk that the lead and bar would collide with the bracket 10 and the bottle 8. Furthermore, even if it is impossible to attach the bracket 10 to the transformer top cover 9 due to the structure of the transformer, the method shown in FIG. 2 cannot be adopted.

(4) Purpose of the Invention The purpose of the present invention is to easily and reliably check the contents of oil-filled electrical equipment such as transformers, even when there are multiple contents stored in the outer box or when the contents are different. An object of the present invention is to provide a method for supporting the contents of oil-filled electrical equipment that can support the contents of oil-filled electrical equipment.

(5) Structure of the Invention Hereinafter, the structure of the present invention will be explained with reference to the embodiment shown in FIGS. 4 and 5.

First, the transformer was fixed to the side of the transformer contents 20 in advance.
- A bin 22 is provided to protrude upward from the bumper 21 of the iron core fastening fitting. Next, the transformer contents 20 are placed in the transformer outer box 2.
3, the bin 22 is placed on the outer periphery of the bin 22 of the bumper 21.
A steady rest 26 having a hole 24 and a mounting hole 25 for a fixing bolt is inserted, and this steady rest 26 is attached to a seat 27 provided on the inner wall of the transformer outer box 23.
Fix it using the fixing bolt 28. After that, attach the fixing plate 29, which has a hole that matches the outer diameter of the bottle 22 in advance, to the bottle 22.
The fixing plate 29 is inserted into the outer periphery of the bottle 22 , the positions of the fixing bolt mounting holes 25 for the steady rest 26 are copied into the fixing plate 29 , and the fixing plate 29 is pulled out from the bin 22 . And this fixed plate 29
After drilling holes for the bolts, the bolts are reattached to the bin 22, and the fixing plate 29 is fixed to the steady rest 26 with fixing bolts 30.

(6) Effect of the Invention By doing this, the difference in dimension W4 in the vertical direction is determined between the bottle 22 and the hole 24 of the steady rest 26, and the dimensional error in the horizontal direction is determined by the difference in dimension W4 between the bolt 30 of the steady rest 26 on the fixed plate 29. This can be absorbed by copying the mounting hole positions.

(7) Modification Note that the present invention is not limited to supporting the contents of a transformer, but can be widely applied to other oil-filled electrical equipment in which the contents are housed in an outer box.

(8) Effects of the Invention As described above, the content support method of the present invention attaches the side surface of the content to the inner wall of the outer box, so even if the height of the content of oil-filled electrical equipment such as a transformer is low, There is no need to increase the length of the bottle unlike the conventional type in which the contents are supported by the top cover of oil-filled electrical equipment, and there is no risk of excessive force being applied to the outer box during vibration. In addition, since the fixing plate 29 is on the side of the oil-filled electrical equipment, after temporarily attaching the steady rest 26 to the seat 27 and bottle 22 on the inner surface of the outer box of the oil-filled electrical equipment, the top cover of the oil-filled electrical equipment is attached. After the fixing plate 29 is drilled, the fixing plate 29 can be attached to the steady rest 26 by entering the tank of the oil-filled electrical equipment through a manhole in the upper cover of the oil-filled electrical equipment. This is extremely effective in preventing the absorption of moisture from the contents of dry oil-filled electrical equipment and also on protectors, and has the advantage that connection work is not interrupted. Furthermore, even when connecting leads and bars are arranged on the upper part of the oil-filled electrical equipment, or when it is structurally impossible to attach a metal fitting to the top cover of the oil-filled electrical equipment, the present invention can be used as a steady rest, etc. Since it is located on the side of the oil-filled electrical equipment, it is possible to support the contents of the oil-filled electrical equipment.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an example of a conventional content support method;
The figure is a sectional view showing another conventional example, FIG. 3 is a plan view illustrating the drawbacks of the conventional type, FIG. 4 is a plan view showing an example of the method of supporting the contents of the present invention, and FIG. - It is a sectional view of the A line. 20...Contents of transformer, 21...Bamba, 22...
Bin, 23...Transformer outer box, 26...Sway rest, 2
7...Seat, 28.30...Fixing bolt, 29...
Fixed plate. 7317 Representative Patent Attorney Kensuke Norichika (and 1 other person) -8- Figure 1 Figure 2 Figure 3 Figure 4 DoV

Claims (1)

[Claims] A bottle is protruded from a bumper fixed to the inside of the oil-filled electrical equipment, and a steady rest with a hole for the outer diameter of the bottle plus a dimensional error and a screw hole for a fixing bolt is attached to the bottle of the bumper. After attaching the steady rest to the seat of the outer box of the electrical equipment, insert a fixing plate with holes that match the outside diameter of the bottle into the bottle, and mark the screw hole positions for the steady rest fixing bolts on this fixing plate. A method for supporting the contents of oil-filled electrical equipment, characterized in that after making a copy hole and drilling holes in a fixing plate removed from a bottle, the fixing plate is reattached to the bottle and fixed to a steady rest with fixing bolts.