JPS61251010A - Electromagnetic induction device - Google Patents

Abstract

PURPOSE:To contrive improvement in reliability of the titled device as well as to increase in its cooling efficiency by a method wherein a branching device, with which the oil contained in a cooler is discharged through a pump, is provided at the coupled part which is used to couple the cooler and a tank. CONSTITUTION:A branching device, having a large-calibered coupling pipe 71 arranged between a tank 3 and a cooler 4 and a small-calibered pipe 72 with which the oil fed from a pump 5 through a hole provided on the coupling pipe 71, are provided. The oil fed from the pump 5 is delivered from the delivery pipe 72 of the branching device as shown by the solid line arrow in the diagram when the pump 5 is in operation. Then, when the pump 5 is in a non-operated state, the oil runs between the outer circumference of the delivery pipe 72 and the coupling pipe 71 in the direction as shown by the dotted line arrow in the diagram. As a check valve device is not used as above-mentioned, the wasteful space in height direction can be removed, the height of the cooler 4 can be increased, and the trouble of a transformer caused by an unsatisfactory valve device can be eliminated, thereby enabling to improve the reliability of the transformer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling device for an electromagnetic induction device, particularly an oil-fed transformer having a self-cooling capacity.

[Conventional technology]

Figure 2 shows a conventional electromagnetic induction device of this type, especially an oil-fed transformer with self-cooling capacity.
) is the iron core, (2) is the coil wound around the iron core (1), (3) is the tank that contains the cooling oil together with the iron core (l) and the fill (2), and [4] is the tank ( 3) is connected to the cooler to cool the oil, and (5) is the tank (3) and the cooler (43).
(62 is a check valve device that is placed between the tank (37) and the cooler (4) and has a valve body.

In the conventional device configured in this way, when the pump (6) is not in operation, the valve body of the check valve device (6) is in the position shown in the figure due to its own weight, and the oil flows in the direction shown by the dotted arrow. Next, when the pump (5) is operated, the check valve device (6)
The pressure inside becomes noble, the valve body closes, and the oil flows in the direction shown by the solid arrow.

[Problem that the invention seeks to solve]

In this conventional type, the valve body of the check valve device (6) uses a type that falls under its own weight, so the height is large, so the height of the cooler (4) must be reduced accordingly. If the check valve device malfunctions and does not close while the pump (5) is in operation, the oil flow will be diverted from the check valve device (6) without passing through the cooler (4ν). Pump (5)
This creates a short circuit through the transformer, making it impossible to cool the transformer, resulting in an extremely dangerous situation.

This invention was made to eliminate the drawbacks of the conventional ones.In addition to increasing the height of the cooler, it does not use moving parts such as valves, so it does not break down and is safe. It is an object of the present invention to provide an electromagnetic induction device having a shunt device that can cool the current.

[Means to solve the problem]

The electromagnetic induction device according to the present invention has a cooler coupled to a tank that stores the main body of the electromagnetic induction device together with oil. A flow dividing device having a section is provided.

[Effect]

Since the flow dividing device according to the present invention has no moving parts, it does not break down and not only improves reliability, but also reduces the dimension in the height direction, so the height of the cooler can be increased.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, (7) is a large diameter connecting pipe (2) placed between the tank IJ and the cooler 141, and this connecting pipe (
2) It is a flow dividing device having a small diameter delivery pipe which opens inside and sends out the oil supplied from the pump (5). The rest of the configuration is the same as the conventional one shown in FIG. 2, so the explanation will be omitted.

With this structure, when the pump (5) is in operation, the oil supplied from the pump (5) is sent out from the delivery pipe of the flow dividing device (7) as shown by the solid line arrow.

Next, when the pump (5) is stopped, oil flows between the outer periphery of the delivery pipe and the connecting pipe (2) in the direction shown by the dotted arrow.

With this configuration, since no check valve device is used, wasted space in the height direction can be omitted, and the cooler (
4) The height of the transformer can be increased, and there is no fear of transformer accidents due to failure of the valve device, and the reliability of the transformer is improved. - In this embodiment, the flow dividing device (
7) has a small diameter delivery pipe (2) in the center of the large diameter connecting pipe (2).
), but the delivery pipe (2) is the connecting pipe (2).
It may be placed at any position within. A delivery pipe with a small cross-sectional area may be arranged around a connecting pipe with a large cross-sectional area to create a double pipe structure, and the oil supplied from the pump may be sent to the outside of the double pipe. .

〔Effect of the invention〕

As mentioned above, the electromagnetic induction device according to the present invention uses both the self-cooling type and the oil feeding type using the flow dividing device.
The reliability of the device is improved and the cooling capacity can be increased by increasing the height of the cooler.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view of main parts showing one embodiment of the present invention;
The figure is a sectional side view of a main part of a conventional electromagnetic induction device of this type. In the figure, (1) is the iron core, (2) is the fill, (3) is the tank, [4J is the cooler, (5) is the pump, (6) is the check valve device, and (7] is the flow dividing device. .

Claims (3)

[Claims] (1) A tank that stores the main body of the electromagnetic induction device together with oil, a cooler connected to this tank to cool the oil, a connecting part that connects this cooler and the tank, and the oil in the cooler sent out by a pump. An electromagnetic induction device comprising a flow dividing device having a sending section. (2) The electromagnetic induction device according to claim 1, wherein the sending section of the flow dividing device is disposed within the connecting section. (3) The electromagnetic induction device according to claim 1, wherein the sending portion of the flow dividing device is arranged on the outer periphery of the connecting portion.