JPS5923380Y2 - Cooling equipment for electrical equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improved structure of a cooling device that is placed separately from the main body of an electrical device.

Conventionally, there has been a so-called separate cooling device of this type, as shown schematically in FIGS. 1 and 2.

In the figure, 1 is an electrical device such as a transformer, 2 is an oil pipe,
3 is a gate valve, 4 is a plurality of coolers connected to the oil feed pipe 2, 5 is an oil expansion chamber, and 6 is a frame for fixing the cooler 4 and the oil expansion chamber 5.

However, the configuration of such a conventional device requires a large installation area, which increases the cost of foundation work, requires a large number of parts, and has the disadvantage that on-site assembly requires a lot of time and labor costs.

This invention was made in view of the above points, and one embodiment of this invention will be explained with reference to FIGS. 3 to 6.

Figures 3 and 4 show cross-sections of the cooling device of this invention in plan and side views, where 6 is a cylindrical outer tube, 7 is a cylindrical inner tube, and these two tubes are concentrically arranged. The lower ends of both tubes are closed with a bottom plate 8.

Reference numeral 9 denotes an upper plate having a gas sealing port 10, which closes the upper end of the outer tube 6 and opens the upper end of the inner tube 7 with a gap between it and the upper plate 9.

11 is a partition plate that vertically divides the space between the outer tube 6 and the inner tube 7 into three chambers, 12 is a communication hole provided in the center of the inner tube 7, and 13 is a radial partition around the outer tube 6. The upper and lower portions of the coolers are arranged in the upper and lower chambers and communicate with the upper and lower chambers formed between the outer tube 6 and the inner tube 7, respectively.

Cooling oil 14 is filled in the upper and lower chambers, and nitrogen gas 15 is filled in the inside of the inner tube 7 and the central chamber, and this gas also fills the cooling oil in the upper chamber.

16 is an oil level indicator.

The cooling device having such a configuration is connected to a transformer 1 by an oil pipe 2, as shown in FIGS. 5 and 6.

17 is a pressure gauge, and 18 is a connecting pipe. In the cooling device of this invention having the above-described structure, the portion consisting of the outer tube 6 and the inner tube 7 serves as a fixed frame for the cooler 13, so there is no need to install a separate frame, and the installation area is limited to the bottom plate 8. The cost of foundation work can also be reduced because the area is sufficient.

In addition, nitrogen gas 15 for preventing deterioration of the cooling insulating oil 14 is provided inside the inner tube 7 and between the inner and outer tubes communicating with the inner tube 7 through the communication hole 12.
However, since this part functions as an oil expansion chamber, the overall structure can be made compact.

As mentioned above, this invention can make the overall structure more compact than the conventional one, reducing the costs required for installation, assembly, etc., and making transportation easier, eliminating the drawbacks of the conventional one. This is Shiruchino.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a conventional cooling device in line, Fig. 2 is a side view thereof, Fig. 3 is a plan sectional view showing an embodiment of this invention, Fig. 4 is a side sectional view, and Fig. 5 is a plan view showing a conventional cooling device. The figure is a plan view showing how the device is used, and FIG. 6 is a side view thereof. In the figure, 1 is the transformer, 2 is the oil pipe, 6 is the outer pipe, and 7
1 is an inner tube, 8 is a bottom plate, 9 is an upper plate, 11 is a partition plate, 13 is a cooler, 14 is cooling oil, and 15 is nitrogen gas. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] The lower ends of the outer and inner tubes arranged concentrically are closed with a bottom plate, the upper end of the inner tube is an open end, the upper end of the outer tube is closed with a top plate, and the outer and inner tubes are separated into upper and lower parts by a partition plate. A liquid refrigerant is stored in these upper and lower chambers, and gas is sealed in the upper part of the upper chamber and inside the inner tube, and a plurality of coolers are arranged radially around the outer tube. A cooling device for electrical equipment, characterized in that the upper and lower parts of the cooler are connected to the upper and lower chambers, and a liquid refrigerant passage is provided between the upper and lower chambers and the electrical equipment to be cooled.