JPH05135955A - Method for transportation of disassemble transportation transformer - Google Patents

Abstract

PURPOSE:To enable a non-voltage tap selector to be easily transported and reassembled by making it easier to decomposition transportation of a large- capacitance, large-sized transformer. CONSTITUTION:A method for transporting a title transformer where a transformer is disassembled into the content and upper, lower tanks, transported to the site, and reassembled on site: a non-voltage tap selector 5, tap leads 6 fixed by a lead fixing board, lead supports 7, and the like are stored into an upper tank 3, further, the lower flange 3d of the upper tank 3 is provided with a centering guide 3c to transport.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting a disassembled transport transformer in which a transformer is disassembled into contents and a tank, transported to the site, and reassembled at the site.

[0002]

2. Description of the Related Art In recent years, power transmission systems have become
In addition to higher voltage such as 500KV power transmission, the transformer used for power transmission and transformation is also increasing in capacity. In addition, the transmission distance has been lengthened, and the transformer is often installed in a mountainous area where the transportation conditions are more severe, and it is necessary to greatly reduce the transportation size and weight.

Conventionally, in the case of a transformer installed in such a place, for example, in the case of a three-phase transformer, it is constructed as three single-phase transformers and disassembled and transported. There is a disassembling transportation transformer configured as a three-phase transformer by connecting and coupling each single-phase transformer by a duct to perform three-phase wiring.

Further, the transformer assembled in the factory is divided into the contents and a split tank, and further, it is subdivided into parts such as an iron core leg, an iron core upper and lower yoke, a winding and a split tank, and these are reassembled on site. There is a disassembled transport transformer system.

[0005]

When a transformer of 300 MVA class is configured by the split transportation transformer method, a unit transformer of up to 3 divisions is generally used because of the local installation space and the economical efficiency of the transformer. Is limited to about 60 tons. Therefore, for the transportation of local trailers after transportation by rail or ship, there is a problem that road reinforcement work including reinforcement of large bridges is required and enormous transportation costs are required.

On the other hand, the subdivision transport transformer can be transported from the factory to the site without a road reinforcement by a general trailer.
It is necessary to reassemble as in the case of factory assembly, it takes a long time to reassemble disassembled parts, and the insulation such as connecting leads and lead supports absorbs moisture and a re-drying process is required. There were drawbacks such as an increase in construction period.

The object of the present invention is not only to achieve a significant reduction in transportation cost by allowing the general trailer to directly transport the transportation size and weight of a partial unit which is disassembled and transported in a large-capacity, large-sized transformer from the factory to the site. In particular, the non-voltage tap changer, the tap lead fixed by the lead fixing plate, the lead support, etc. are stored in the disassembled upper tank, and the centering guide is attached to the flange at the bottom of the upper tank for transportation. By doing so, it is possible to reduce the number of reassembling parts, prevent deformation of the tap lead, simplify the on-site assembly, and significantly shorten the assembly period, and provide an economical disassembling transportation transformer transportation method.

[0008]

In order to achieve the above object, according to the present invention, a non-voltage tap changer, a tap lead fixed by a lead fixing plate, a lead support, etc. in a disassembled upper tank. And a centering guide is provided on the lower flange of the upper tank for transportation.

[0009]

With this structure, the upper tank is provided with a non-voltage tap changer and a bushing as long as the transport limit allows, but at least the inner leads and the lead support should be supported from the inner wall of the upper tank. As a result, it can be assembled and transported together with the upper tank without disassembling. Further, by providing a centering guide on the lower flange of the upper tank, it becomes easier to position the lower tank and the upper tank at the site, which simplifies the on-site content assembly and shortens the construction period.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show the disassembled upper tank in a transported state, in which the iron core 1 and the winding 2 are disassembled and separately sent. A non-voltage tap changer 5 is provided in the upper tank 3.
A tap lead 6 which is built in and is separated from the winding in the vicinity of the winding 2 is fixed at several places by a lead support 7 supported from the inner wall of the upper tank 3 and connected to the non-voltage tap changer 5. FIG. 3 shows details of the tap lead 6 fixing portion. The tap lead 6 is fixed not only by the lead support 7 but also at several places by the lead fixing cord 7b to the lead fixing plate 7a mounted between the lead supports 7, In order to secure a necessary distance for insulation, the lead support 7 is kept away from the tank wall, and the tap leads between the lead supports 7 are prevented from being deformed during transportation. FIG. 4 shows the mounting state of the centering guide 3c. The lower flange 3d of the upper tank 3 is aligned with the tank transport cover 3b.
Is fixed in several places all around.

FIG. 5 and FIG. 6 show the final assembled state at the site, but the lower tank 4 sent separately is set on the foundation surface,
Further, the iron core 1 and the winding 2 which are separately sent are assembled. After that, the tank transport cover 3b is removed from the upper tank 3 and the contents are covered with it. In that case, alignment with the lower tank 4 can be easily performed by the centering guide 3c. The tap lead 6 and the winding 2 are connected from the tank opening 3a, and the bushing 8
Is attached, the insulating oil 10 is sealed, and the work is completed.

With the above structure, the non-voltage tap changer and the tap lead fixed by the lead fixing plate and the lead support are housed in the upper tank disassembled,
Further, since a centering guide is provided on the lower flange of the upper tank for transportation, the reassembly portion can be reduced and deformation of the tap lead can be prevented, which simplifies on-site assembly and shortens the assembly period.

[0014]

As described above, according to the present invention,
The non-voltage tap changer and the tap lead and lead support fixed by the lead fixing plate are stored in the disassembled upper tank, and a centering guide is provided on the lower flange of the upper tank to transport the reassembled part. It is possible to provide an economical transport method for disassembling and transporting transformers by reducing deformation, preventing tap lead deformation, simplifying on-site assembly, and significantly shortening assembly time.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a tap lead fixing portion.

FIG. 4 is a cross-sectional view showing attachment of a centering guide.

FIG. 5 is a plan view showing a final assembled state.

FIG. 6 is a front view showing a final assembled state.

[Explanation of symbols]

 1 ... Iron core 2 ... Winding 3 ... Upper tank 3b ... Tank transport cover 3c ... Centering guide 3d ... Lower flange 4 ... Lower tank 5 ... Non-voltage tap changer 6 ... Tap lead 7 ... Lead support 7a ... Lead fixing plate

Claims (1)

[Claims] 1. A method of transporting a disassembling and transporting transformer, in which contents and a tank are disassembled and transported, and then reassembled on site, in the upper tank, a non-voltage tap changer and a tap lead fixed to a lead fixing plate. The method of transporting a disassembling and transporting transformer, characterized in that the disassembling and transporting transformer is characterized in that it is housed and further provided with a centering guide on the lower flange portion of the upper tank.