JPH04116807A - Transportation and assembling process of separated transportation type gas-insulated transformer - Google Patents

Abstract

PURPOSE:To enable the assembling operations at a site to be easily performed within a short time by a method wherein the opening of a cooling piping of a cooling device is sealed up with a film and the title transformer is transported to a site with an insulating gas contained therein as it is and after connecting the cooling device to a butterfly valve at the site, the butterfly valve is opened to break down the film by a partition plate so that the cooling device and a tank may be communicated with each other. CONSTITUTION:The main body containing a transformer itself 2 and a cooling device 3 are separated by a butterfly valve 8 provided in the cooling piping 9b of a tank 1 for separated transportation while the opening of the cooling piping 9a of the cooling device 3 is sealed up with a film 10 avoiding the permeation of an insulating gas. At a site, the cooling pipings 9a, 9b are assembled into one body with the tank 1 on the transported main side and the cooling device 3 left as they are. Later, the butterfly valve 8 of the cooling piping 9b on the tank 1 side is opened to break down the film 10 fitted to the opening of the cooling piping 9a of the cooling device 3 with the partition plate 12 of the valve 9 so that SF6 gas 6 in the tank 1 and the cooling device 3 may be communicated with each other.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to transportation and assembly of a gas-insulated transformer of a split transport type in which the tank and cooling device of the transformer body are separated and transported to the site. Regarding the method.

(Prior art) Various improvements have been made to power transmission and substation equipment in recent substations, especially underground substations, etc., in order to make the equipment more compact and lightweight, as well as to make effective use of installation space and prevent fires. has been done. One of them is transformers,
In place of conventional oil-immersed transformers, gas insulated transformers using SF or gas as an insulating medium are increasingly being adopted. As shown in Fig. 4, this gas insulated transformer is constructed by storing the transformer contents 2 in a tank 1 of the transformer body, attaching a cooling device W3 to the outside of the tank 1, and filling the inside with insulating gas. has been done. This cooling device 3 is equipped with a cooling fan and a gas blower, and is connected to a butterfly valve 8 provided in a cooling pipe 9b on the tank 1 side via upper and lower cooling pipes 9a. is now circulating.

When transporting a gas insulated transformer constructed in this way to the installation site is severely restricted, it is divided at the factory into the main body, which consists of a tank 1 and the transformer contents 2, and a cooling device 3, as shown in Figure 5. The cooling pipe 9b on the main body side is partitioned off with a butterfly valve 8, and the opening of the cooling pipe 9a on the cooling device 3 side is closed with a transportation lid 14 made of a steel plate for transportation. Then, at the site, the transportation lid 14 on the side of the cooling device 3 is removed, and the lid 14 on the side of the cooling device 3 is connected to the cover 8 on the main body side and assembled together. This type of split transportation system has come to dominate as gas-insulated transformers have been installed in urban substations. Therefore, it is desired to further simplify transportation methods and on-site assembly methods.

(Problem to be Solved by the Invention) However, in the conventional gas insulated transformer shown in FIG. 5, the tank on the main body side can be separated from the position of the butterfly valve 8 and transported with SF gas sealed therein. However, the cooling device 3 side is not equipped with a butterfly valve 8 and is only closed with a temporary transportation lid 14. Therefore, it is not possible to transport the SF gas 6 with it sealed, and the Remove the transport lid 14 of the cooling device 3 and remove the cooling pipe 9b on the main body side.
After that, the inside of the cooling device 3 is connected to the SF valve 8.
The on-site construction work is prolonged due to evacuation work, SF, gas injection work, etc. in order to replace with gas, and there is also a drawback that a means and space for carrying in these vacuum evacuation devices and the like are required.

An object of the present invention is to transport a gas insulated transformer that can be transported in parts, which allows for easy on-site assembly of a cooling device and a tank on the main body side that have been transported in parts, in a short period of time, and which does not require any extra assembly equipment. The purpose is to obtain an assembly method.

[Structure of the Invention] (Means and Effects for Solving the Problems) In the present invention, the opening of the cooling pipe of the cooling device that is separated and transported from the tank on the main body side is sealed with a film, and the inside of the cooling device is sealed. Transported to the site with insulating gas still sealed.

Then, at the site, connect the opening to the butterfly valve of the cooling piping of the tank on the main body side with the opening sealed with a film, and then open the gate valve of the butterfly valve (by rotating the partition plate and tearing the film, The inside of the cooling device is communicated with the inside of the cooling device so that an insulating gas circulates therebetween.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, the same parts as in FIGS. 4 and 5 are given the same reference numerals, and the explanation thereof will be omitted. In Fig. 1, after the assembly test of the gas insulated transformer was completed at the factory, the main body containing the transformer contents 2 in the tank 1 and the cooling device 3 were installed in the cooling pipe 9b of the tank 1 for separate transportation. The SF @ gas 6 is separated in the tank 1 by separating it with a butterfly valve 8, and the SF and gas 6 in the cooling device 3 are recovered by a recovery device, and the opening of the cooling pipe 9a of the cooling device 3 is separated. As shown in FIG. 2, it is sealed with a film 10 that does not allow insulating gas to pass through. Thereafter, SF and gas 6 are again sealed inside the cooling device 3, and the tank 1 and the cooling device 3 are transported to the site separately. The inside of the tank 1 is also closed with a butterfly valve 8, and the SF and gas 6 are transported while being sealed therein.

At the site, the tank 1 and cooling device 3 on the main body side that were transported are left as they are and the cooling piping 9a is installed.

Combine 9b together. After that, by opening the butterfly valve 8 of the cooling pipe 9b on the tank 1 side, as shown in FIG. 3(a).
As shown in (b), the partition plate 12 of the butterfly valve 8 breaks the film 10 attached to the opening of the cooling pipe 9a of the cooling device 3, and the S F s between the tank 1 and the cooling device 3 is broken.
Gas 6 is communicated.

In this way, it becomes possible to transport the cooling device 3 with SF and gas 6 sealed in it and assemble it on site, and it is possible to omit the work of evacuation of the cooling device 3 and the work of filling SF and gas at the site. This eliminates the need for extra assembly of vacuum pumping devices, etc., and for transporting manufacturing equipment to the site, which ultimately shortens the on-site assembly period.

[Effects of the Invention] As described above, according to the present invention, the tank containing the contents of the transformer and the cooling device are separated and transported to the site, and the cooling piping of the cooling device is installed on the cooling piping of the tank at the site. In the transportation and assembly method for a split-transport type gas insulated transformer that is connected to a butterfly-shaped valve and assembled, the opening of the cooling piping of the cooling device is sealed with a film, and the insulating gas is stored inside when transported to the site. After connecting the cooling piping to the butterfly valve at the site, we opened the butterfly valve and broke the film using the partition plate to allow communication between the inside of the cooling system and the inside of the tank. It is possible to obtain a method for transporting and assembling a gas insulated transformer of a split transport type, which allows on-site assembly work with a side tank to be easily performed within a short time and does not require any extra assembly equipment.

[Brief explanation of drawings]

FIG. 1 is a front view showing a gas insulated transformer according to an embodiment of the present invention, FIG. 2 is an enlarged view of its main parts, and FIGS.
b) is a side view and front view showing the on-site assembly method, Figure 4 is a front view showing a conventional gas insulated transformer, and Figure 5 is a front view showing the same conventional transportation and assembly method. . 1... Tank, 2... Transformer contents, 3... Cooling device, 6... Insulating gas, 8... Butterfly valve, 9a, 9
b...Cooling pipe, 10...Film, 12...Partition plate. Figure 3

Claims (1)

[Claims] A separate transport type in which the tank containing the contents of the transformer and the cooling system are separated and transported to the site, and then assembled at the site by connecting the cooling piping of the cooling system to the butterfly valve installed in the cooling piping of the tank. In the transportation and assembly method of gas insulated transformers,
The opening of the cooling piping of the cooling system is sealed with a film, and the insulating gas is stored inside and transported to the site.After connecting the cooling piping to the butterfly valve at the site, the butterfly valve is opened and the film is broken with a partition plate. A method for transporting and assembling a gas insulated transformer of a split transport type, characterized in that the inside of a cooling device and the inside of a tank are communicated with each other.