JPS5823421A - Carrying method for oil in radiator in oil-immersed electric apparatus - Google Patents

Abstract

PURPOSE:To unnecessitate the preparation of a conserving tank for the oil which is so extracted that the oil in a faulty radiator is carried and contrive the labor saving and efficiency for the work of extracting an oil, by pressing an inert gas into the radiator. CONSTITUTION:The upper valves of valves 5, 5 and closed, the lower valves are opened, and a nitrogen gas bomb 6 is connected to the upper part of the radiator 2 via a connection tube 7. Thereafter a nitrogen gas is pressed into the radiator 2, and the oil in the radiator 2 is carried into a tank 4 equipped with a conservator 18 by the pressure of the nitrogen gas. Thereafter, the valves 5, 5 are closed, the faulty radiator 2 is removedm a normal radiator is installed instead thereof, the connection tube 7 is removed, the valves 5, 5 are opened, and thus the oil is replaced. Thereby, the work for replacement of the faulty radiator 2 is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for transferring oil within a radiator in an oil-filled electrical appliance such as an oil-filled transformer.

Generally, when a failure occurs in the radiator of an oil-filled electrical appliance such as an oil-filled transformer, the failed radiator must be removed and replaced with a normal radiator. If the radiator of the oil-immersed transformer α) fails, remove the oil from the oil-immersed transformer (1), remove the malfunctioning radiator ■, and install a normal radiator. Re-inject the removed oil and complete the radiator replacement work.In addition, (2a)
)ld The heatsink is not malfunctioning.

In the above case, since the entire amount of oil in the transformer (1) is taken out and put in, an oil storage tank that can store the entire amount is required. is necessary. In order to reduce the capacity of such oil storage tanks and the time it takes to take oil in and out, the radiator (21) and transformer tank (4), which have failed in Fig.
) By closing the pulp Tit+fi+ provided between the radiator (2) and draining only the oil in the radiator (2), the capacity of the oil storage tank or the time required to take oil in and out can be reduced to a considerable extent. However, it has the disadvantage that at least a small capacity oil storage tank must be prepared.

This invention was made in view of the above drawbacks.

A method for transferring oil within a radiator that does not require an oil storage tank is provided.

An embodiment of the present invention will be described below with reference to FIG. 2, taking as an example the work of replacing a failed radiator in a transformer. In the same figure, (υ~(5) is the same as the conventional one above, and in order to remove the failed radiator (2), pulp f51 fi
Close the upper pulp of l, open the lower pulp, connect the nitrogen gas cylinder (6) to the upper part of the radiator via the connecting pipe (), and then inject nitrogen gas into the radiator (2). The oil in the radiator 0) is transferred to the tank (4) equipped with the conservator brocade by the pressure of nitrogen gas, and then,
Close the pulp f151 flit, remove the malfunctioning radiator (p), install a normal radiator in its place, and connect the connecting pipe (
]), open the pulp (5) + Itl and return the oil to its original position, completing the replacement work for the failed radiator e).

According to the method described above, the oil body tube tank as in the conventional example described above is not required, and therefore the work of refilling the extracted oil is also not required. still.

In the above embodiment, the upper and lower parts of the radiator Q) are the transformer tank (4).
Although the case where the radiator is connected to the transformer tank is shown, it can also be used when only the lower part of the radiator is connected to the transformer tank.

As explained above, according to the method of the present invention, in a device for transferring oil in a radiator provided in an oil-filled electrical equipment tank equipped with a conservator, the oil in the radiator is transferred to the oil-filled electrical equipment tank. Since there is no need to prepare a storage tank for the extracted oil as in the conventional example, the work of removing oil from the radiator can be labor-saving and efficient.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing how oil is removed and injected into a conventional transformer, and FIG. 2 is a schematic diagram showing how nitrogen gas is injected into a radiator of a transformer according to an embodiment of the present invention. In Figure 6, (1) is the transformer, (2) is the radiator, (3) is the oil,
(4) is a transformer tank, (5) is a pulp, and (8) is a conservator. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Makoto Kuzuno

Claims (1)

[Claims] At least a lower part of a radiator is connected to an oil-filled electric tank equipped with a conservator, and the oil in the radiator is transferred into the tank by pressurizing an inert gas into the radiator. A method for transferring oil in a radiator in an oil-filled electrical appliance.