JPS6273612A - Transformer - Google Patents

Abstract

PURPOSE:To maintain the assembly dimensions of a transformer and to facilitate the assembly at the site by providing at least more than two pins and pin con nection holes to be embedded each other in the strengthening beam of each unit transformer placed between connecting ducts facing each other. CONSTITUTION:At least two pins 7 and holes 6 connected with the pins are provided in the strengthning beams 3A and 3B, on whose side are connecting ducts 5A and 5B facing each other of each unit transformer 1A and 1B. In this case, the mounting dimensions for the connecting part of the unit transformers 1A and 1B at the site is arranged under the consideration of the mounting dimensions in the factory, and the hole 6 to be connected to the pin 7 is vertically oval-shped under the consideration of the assembly at the site so that the lower position matches to the position of the pins at the time of the regular assembly. Thus, it is made possible to assemble the transformer, without any difference in the mounting dimensions of the unit transformers 1A and 1B at the site with the mounting dimensions within the factory, accurately controlling the assembly of ducts at the site.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a high-voltage, large-capacity transformer divided into a plurality of unit transformers.

[Technical background of the invention and its problems]

In recent years, with the increase in electricity demand, the number of substation equipment has increased to 8, and 500Kv class transformers are currently being manufactured and operated.
Large-capacity, high-voltage equipment is also planned. Five large-capacity transformers like this have relatively few restrictions when installed in coastal areas such as power plants, but when installed in mountainous areas or underground substations in urban areas, there are transportation restrictions. single phase 6
This single-phase transformer is divided into units and further divided into smaller transportation units.

In such a case, it is necessary to house each divided unit transformer through a duct, connect the high voltage leads to each other, and draw them out using external couplings for connection. In such a case 5
Because class 00 high voltage leads have a complex insulation structure, it is important to accurately position and assemble the connecting duct on-site to ensure the quality of the transformer. However, on-site fitting work such as welding not only cannot completely reproduce the test conditions in the factory, but also makes it difficult to ensure dielectric strength unless the welded parts are completely repaired.

From this point of view, in order to ensure the mutual positional dimensions of the unit transformers, pins are arranged on a common anchor base to maintain the mutual position during on-site assembly, as disclosed in, for example, Japanese Patent Application Laid-Open No. 55-120113. I need a method.

However, even with the above method, the connecting duct is usually attached to the side or top of the transformer, so perfect positioning is difficult.

[Purpose of the invention]

Therefore, it is an object of the present invention to eliminate the above-mentioned drawbacks, ensure dimensions for mutual assembly of the divided transformers, and provide a transformer that facilitates on-site assembly.

[Summary of the invention]

The present invention relates to a transformer constructed by arranging a plurality of unit transformers in parallel on a common base beam and connecting each unit transformer with a pocket duct. The present invention is characterized in that at least two or more pins and pin fitting holes are provided on the reinforcing beam to fit into each other.

[Embodiments of the invention]

The present invention will be explained below based on the drawings.

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a top view thereof, and FIG. 3 is a view showing a fixing device according to the present invention.

Unit transformers xA and xB are arranged on a common base 4 and mechanically coupled through ducts 5A and 5B, respectively. Contents of each
The high voltage lead 8 connecting the ducts 5A, 5
The interior of B is further insulated with an insulation barrier or the like.

In the present invention, each unit transformer 51A, IB's opposing joint ducts) 5A, 5B are provided with side reinforcement beams 3A.

3B As shown in FIG. 3, at least two pins 7 and holes 6 to fit the pins are provided on the top. According to such a structure, the unit transformer 61A, xB at the site
Considering the assembly dimensions of the joint in the factory and the hole 6 that fits into the pin 7 for on-site assembly, it is an oval shape with the longitudinal direction at the top and bottom as shown in Figure 4. The shape is such that the position matches the pin position during normal assembly. At the site, final assembly and assembly will be carried out using rollers and cranes. Therefore, after the transformer IB having the pin hole 6 is installed in advance, the transformer IA with the pin 7 attached is installed while making contact with the backing plate using the pin 7 as a guide.

In this way, the unit transformer IA at the site.

Since the IB assembly dimensions can be assembled without any discrepancy from the assembly dimensions in the factory, the assembly of the duct parts on site can be controlled with precision. Furthermore, since the main fitting part is provided in the reinforced part of the tank, it is less likely to be deformed during on-site direct air pumping, so there is no reduction in assembly accuracy.

Generally speaking, as shown in FIG. 5, this fitting portion is firmly connected by bolting or welding.

〔Effect of the invention〕

With this structure, the unit transformers are firmly connected to each other, so no excessive force is applied to the ducts during an earthquake, which has the advantage of preventing damage to the ducts and improving vibration resistance.

Furthermore, since the transformer main body is integrated in this way, there are effects such as miniaturization of the fixture for preventing the transformer from falling over.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a top view thereof, and FIGS. 3, 4, and 5 are enlarged views showing a transformer fixing device. IA, IB...Unit transformer 2A, 2B...Contents of unit transformer 3A, 3B, ..., Contents of unit transformer 4...
・Common base 5A, 5B...Connection duct 6
...Pin fitting hole 7...Pin 8.
・・Connecting lead 9 ・・Connecting bolt agent Noriyuki Chika Patent attorney Attorney Hiroshi Mitsumata Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] (1) In a transformer configured by installing multiple unit transformers in parallel on a common base beam and connecting each unit transformer with a pocket duct, each unit transformer between the opposing connecting ducts A transformer characterized in that at least two or more pins and pin fitting holes are provided on a reinforcing beam to fit into each other.