JPH03297115A - Assembly method of transformer to be transported in disassembled state - Google Patents

Abstract

PURPOSE:To reduce an installation space, to sharply shorten an assembly period and to enhance an assembly quality by a method wherein a terminal-connecting conductor is supported by a conductor-supporting member at the inner sidewall of a tank which houses a main transformer content and the main transformer content is sealed so as to be moistureproof and dustaproof and is transported. CONSTITUTION:A terminal-connecting conductor 14 is constituted so as to be supported by a conductor-supporting member 15 at the inner sidewall of a tank 2 which houses a transformer content 1. When the tank 2 is transported, the conductor 14 is kept supported separately from an iron core 11 and a winding 12 which constitute the transformer content 1. Thereby, the height of the inner core 11 and the outside diameter of the winding 12, which constitute the content 1, can be scaled up to the limit of the height and the width of a transportation size limit. As a result, a high voltage and a large capacity can be realized, and the number of divisions of the content 1 by the transportation size limit can be reduced to a minimum. Consequently, a transformer installation space can be reduced sharply. Since the conductor 14 is sealed so as to be moistureproof and dustproof and is transported in a state that it is supported at the inner sidewall of the tank 2, an assembly period can be shortened sharply, a drying process can be shortened sharply and a quality can be enhanced.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Field of Industrial Application) The present invention relates to a method for assembling a transformer for disassembly and transportation, and particularly for facilitating the transportation of large transformers such as ultra-high voltage transformers. This invention relates to a method for assembling a disassembled and transported transformer that significantly shortens the assembly period.

(Prior Art) When transporting a large-capacity transformer to a power plant located in the mountains or to a power plant or substation located underground, there are often restrictions on transport dimensions and transport weight.

Conventionally, for transformers installed in such places, a system has been adopted in which a multi-phase transformer is divided into a plurality of single-phase transformers, as shown in FIG. In this method, multiple single-phase transformers, each containing the contents of the transformer stored in a tank, and an on-load tap changer tank are connected and assembled into a multi-phase transformer by connecting ducts that house internal connection conductors. It is something to do.

Furthermore, although not shown, there is a disassembly transport method in which a transformer assembled at a factory is carefully disassembled into cores, coils, divided tanks, etc., and then reassembled on site.

(Problems to be Solved by the Invention) A method in which a large-capacity multiphase transformer is divided into single-phase transformers and multiple units are assembled on-site requires a large installation space and is uneconomical. On the other hand, in the segmented, disassembled, transported and assembled method, it takes a long time to reassemble the disassembled parts on site, so the insulator absorbs moisture and requires a long drying process.

The purpose of the present invention is to reduce the installation space, significantly shorten the assembly period, and improve the assembly quality by strictly observing the transportation size and transportation weight restrictions in large capacity transformers and by minimizing the division and disassembly parts. The purpose of this study is to obtain a method for assembling a disassembled and transported transformer.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a structure in which a terminal connection conductor is supported on the inner wall of a tank that accommodates the contents of the main transformer, and the tank that accommodates the contents of the main transformer is
Separately from the iron core and windings that make up the contents of the transformer, the terminal connection conductors are supported on the inner wall of the tank, sealed moisture-proof and dust-proof, and transported to the planned installation site. After the transformer is housed in the transformer, the moisture-proof and dust-proof seal member is removed, and then the terminal connection conductor is connected to the transformer winding outlet and the tank penetration terminal.

(Function) The transformer configured as described above can increase the height of the core and the outer diameter of the winding that make up the inside of the transformer to the limit of the height and width of the transport size restrictions, making it possible to achieve high voltage and large capacity. At the same time, the number of divisions can be minimized. In addition, since the terminal connection conductor is transported while being supported on the inside wall of the tank, the connection work can be completed at the site by simply pulling out the winding and connecting it to the tank penetration terminal, which can significantly shorten the assembly time. Since the product is transported under moisture-proof and dust-proof seals, the drying process is greatly shortened and quality can be improved.

(Example) An example of the present invention will be specifically described below based on the drawings.

FIG. 1 is a front view of the transformer of the present invention, and FIG. 2 is a sectional view of FIG. 1.

The transformer contents 1 is composed of an iron core 11 and a winding 12. The transportation dimension limit is the width W as shown by the two-dot chain line in Figure 2.
The O2 height is Ho, and the outer diameter of the winding 12 and the height of the iron core 11 are within the limits.

The terminal connection conductor 14 is disposed with a required electrical insulation distance from the winding 12, the content support member 13, and the inner wall of the tank 2, and is supported from the tank inner wall by a conductor support member 15.

The width Wl of the tank 2 that stores the contents 1 of this transformer naturally exceeds the transportation dimension limit width, but as shown in Figure 1, the length Ll of the tank 2 is divided into multiple parts, and each of the divided parts is Since the length L2 of the tank is within the transportation size restriction width Wo, transportation is possible. Also, the terminal connection conductor 14
In this case, a connecting portion 16 is provided near the dividing portion of the tank 2.

When transporting the tank 2, the connection part 16 provided on the terminal connection conductor 14 is disassembled, and the terminal connection conductor 14 is sealed moisture-proof and dust-proof while being supported on the tank 2 and sent to the site. At the site, when assembling the tank 2, the connection part 16
Reassembly completes the connection work.

The operation of this embodiment having the above configuration is as follows.

That is, the terminal connection conductor 14 is supported by a conductor support member 15 on the inner wall of the tank 2 that houses the transformer contents 1, and when the tank 2 is transported, the iron core 11 and the windings 12 that make up the transformer contents 1 are Since the terminal connection conductor 14 is supported separately, the iron core 1 constituting the transformer contents 1 is
1 and the outer diameter of the winding 12 can be expanded to the limit of the height and width of the transport size restrictions, making it possible to achieve high voltage and large capacity, and minimizing the number of divisions of the transformer contents 1 due to transport size restrictions. can do. Therefore, the space for installing the transformer can also be significantly reduced.

In addition, since the terminal connection conductor 14 is transported with a moisture-proof and dust-proof seal while being supported on the inner wall of the tank 2, at the site, the moisture-proof and dust-proof seal member is installed after the transformer contents 1, which were sent separately, are stored in the tank 2. The connection work can be completed by removing the winding and connecting it to the tank penetration terminal, which greatly shortens the assembly time.Since the transport is sealed moisture-proof and dust-proof, the drying process is also greatly shortened, and the quality is high. I can measure the improvement.

Note that the transformer of the present invention is not limited to the embodiments described above, and other embodiments such as those shown in FIGS. 3 and 4 may also be used.

FIG. 3 and FIG. 4 show an example in which there is a margin for transportation dimensions, but there are severe restrictions on transportation weight.

Transport weight restrictions are particularly strict in power plants in mountainous areas and underground substations in urban areas, and as shown in Figure 4, the transport dimensions are limited to width Wo, height Ho, product width W1, and height Hl. Then W. >Wl, Ho>Hl, but the total weight of the transformer contents 1 and the weight of the tank 2 that stores the transformer contents 1 may exceed the weight limit during transportation. Therefore, it is unavoidable that a means of transporting the transformer contents 1 and the tank 2 separately must be taken. Similar to the above embodiment, the transformer contents 1 are as follows:
It is separated at the connection part 16 with the terminal connection conductor 14 and transported with a moisture-proof and dust-proof seal. On the other hand, the tank 2 is transported with the terminal connection conductor 14 supported separately from the transformer contents 1 under a moisture-proof and dust-proof seal. According to the configuration described above, it becomes possible to transport even when transport weight restrictions are strict, and the assembly time at the site can be significantly shortened as in the above embodiment.

Furthermore, even if transport weight restrictions are severe, the same effect can be obtained by dividing the transformer contents 1 into multiple unit transformer contents and configuring the tank as shown in Fig. 1 or Fig. 3 (not shown). It will be done.

Furthermore, the tank structure shown in FIG. 1 or 3 may be used for carefully disassembling and transporting the contents of the transformer.

Further, the tank shape is not limited to a rectangular shape, and the same effect can be obtained even if the tank shape is cylindrical.

[Effects of the Invention] As described above, according to the present invention, the terminal connection conductor is supported on the inner wall of the tank that houses the contents of the transformer, and the tank during transportation is connected to the core and windings that make up the contents of the transformer. By separately supporting the terminal connection conductor on the inner wall of the tank, the number of divisions of the transformer contents due to transportation restrictions can be minimized. Therefore, the installation space can be significantly reduced. In addition, since the terminal connection conductor is transported with a moisture-proof and dust-proof seal while being supported on the inner wall of the tank, at the site, after storing the contents of the transformer separately in the tank, the moisture-proof and dust-proof seal member is removed. The connection work is completed by connecting the terminal connection conductor to the transformer winding outlet and the tank penetration terminal, so that the assembly time can be significantly shortened, the drying process can also be greatly shortened, and quality can be improved.

[Brief explanation of drawings]

Fig. 1 is a plan view of this embodiment, Fig. 2 is a side view thereof, and Fig. 3 is a plan view of this embodiment.
FIG. 4 is a plan view and a side view of another embodiment. 11...Iron core 13...Inner support member 15...Conductor support member 12...Winding 14...Terminal connection conductor 16...Connection part/j Fig. 1 Fig. 2

Claims (1)

[Claims] The terminal connection conductor that connects the transformer winding outlet and the tank penetration terminal is supported by the inner wall of the tank that houses the transformer contents, and the tank that houses the transformer contents is connected to the core and windings that make up the transformer contents. Separately, the terminal connection conductor is supported on the inner wall of the tank, sealed with a moisture-proof and dust-proof seal, and transported to the planned installation site. After storing the contents of the transformer separately in the tank, the moisture-proof and dust-proof sealing member is sealed. A method for assembling a disassembled and transported transformer, comprising: removing the terminal connecting conductor, connecting the transformer winding outlet and the tank penetrating terminal, and then injecting an insulating medium into the main tank.