JP3013731B2 - Oil-filled transformer with oil extraction means - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-filled transformer with oil-collecting means having a structure capable of extracting oil for aging diagnosis.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show an example of a conventional oil-immersed transformer with oil-collecting means as a kind of conventional oil-immersed transformer with oil-sampling means. The instrument oil-filled transformer with oil-collecting means includes a container 1, a transformer main body 2 is installed in the container 1, and the transformer main body 2 is insulated by insulating oil 3 contained in the container 1. I have. An oil amount adjusting device 5 is connected to an upper portion of the container 1 via an oil guide pipe 4. In the oil amount adjusting device 5, an oil guiding pipe 7 is connected to a tip of an oil guiding pipe 4 via a connector 6, and a bellows type oil amount adjusting container 8 having a plurality of cells is branched and connected to the oil guiding pipe 7. I have. A connector 9 is connected to a tip of the oil guide pipe 7. The connector 6, the oil guide pipe 7, the oil amount adjusting container 8, and the connector 9 are housed in a cover 10. The cover 10 is supported by a support base 11 provided horizontally on the upper part of the container 1. A connector 13 is provided at an upper portion of the container 1 via an oil guide pipe 12 adjacent to the oil amount adjusting device 5.

[0003] A valve 15 is connected to the lower part of the container 1 via an oil guide pipe 14. The valve 15 is connected to an adapter 17 which is a part of the oil collecting means 16.
The adapter 17 has a structure including valves 18 and 19 and a flange 20 with a lid.

[0004] Oil is collected in such an instrument oil-filled transformer with oil collecting means by connecting a vacuum pump to a valve 18, an oil collecting container to a flange 20 via a valve (not shown), and connecting the valve 18 in this state. Is opened, the vacuum pump is operated to evacuate the adapter 17, the valve 18 is closed, the operation of the vacuum pump is stopped, the valve 15 is opened, and a part of the insulating oil 3 is sampled by the internal pressure in the container 1. The container is moved into the container, and then the valve of the container is closed, the valve 15 is closed, and the container is disconnected from the flange 20. Flange 2
0 is covered with a lid.

[0005] After the oil is collected, a refueling operation is performed to supply the insulating oil corresponding to the oil collected. In this lubrication operation, a vacuum pump is connected to the valve 19 (not shown), a degassing insulating oil tank containing degassing insulating oil is connected to the flange 20 via a valve, and a valve is connected to the degassing insulating oil tank. The N2 gas tank is connected through the valve, and in this state, the valve 19 is opened and the vacuum pump is operated to evacuate the inside of the adapter 17 and the valve of the degassing insulating oil tank. Stop the operation, open the valve of the N2 gas tank, pressurize the oil level in the degassing insulating oil tank with N2 gas, and then open the valve of the degassing insulating oil tank.
5 is opened to supply the deaerated insulating oil in the deaerated insulating oil tank into the container 1. After refueling, the valve 15 is closed and the adapter 17 is removed.

[0006] Next, a method of extracting oil when the valve 15 is not provided in the lower portion of the container 1 will be described.

In this case, a one-cell oil amount adjusting container (not shown) is connected to the connector 13, and in this state, the oil amount adjusting device 5 is detached from the connector 6 and a new oil amount adjusting device 5 is connected instead. Then, oil was taken from the removed oil amount adjusting device 5.

[0008]

However, such a conventional oil-immersed transformer with oil collecting means has the following problems.

(1) In an oil-immersed transformer with oil collecting means installed at a high place, it is necessary to prepare a large tow truck for oil collecting work and to raise and lower the oil collecting equipment.

(2) When collecting oil, it is necessary to connect an adapter 17 to the valve 15 and prepare a vacuum pump, a degassing insulating oil tank, an N2 gas tank, and the like.

(3) When replacing the oil amount adjusting device 5, it is necessary to prepare another new oil amount adjusting device.
In addition, technology is required for oil overflow and the like, and it is difficult to connect a new oil amount adjusting device.

(4) A special tool or jig is required for connecting the adapter 17 and removing the cover 10 of the oil amount adjusting device 5.

(5) The insulating oil 3 leaks during the operation. Also,
It is difficult to measure oil yield.

An object of the present invention is to provide an oil-immersed transformer with oil collecting means that can easily perform oil collecting.

[0015]

SUMMARY OF THE INVENTION According to the present invention, a transformer main body is installed in a container, the transformer main body is insulated with insulating oil contained in the container, and the container is provided with the insulating oil. The present invention is directed to an oil-immersed transformer equipped with an oil extracting means provided with an oil extracting means.

In the oil-filled transformer with oil collecting means according to the present invention, the oil collecting means includes a connector with an automatic opening and closing valve provided in the container, and a connector with an automatic opening and closing valve connected to the connector with the automatic opening and closing valve. And an attached cassette oil tank.

In this case, the oil collecting means branches and connects the connector with the automatic opening and closing valve to an oil guide pipe in the oil amount adjusting device provided in the container, and connects the connector with the automatic opening and closing valve to the cassette oil tank. A structure in which the connector with the automatic opening and closing valve is connected can be provided.

In the cassette oil tank, the connector with the automatic opening and closing valve is provided at one end of a cassette oil tank main body for storing insulating oil, and an opening is provided at the other end of the cassette oil tank main body. The structure can be closed with a sealing cap.

[0019]

In this manner, the oil collecting means is provided with a connector having an automatic opening and closing valve provided in a container for accommodating the transformer body together with the insulating oil, and a cassette oil tank in which the connector with the automatic opening and closing valve is connected to the connector with the automatic opening and closing valve. With this configuration, at the time of oil collection, the cassette oil tank is removed from the connector with the automatic opening / closing valve provided on the container, and another cassette oil tank containing deaerated insulating oil is connected.

[0020] In this case, oil can be easily collected and supplied by attaching and detaching the cassette oil tank.

In this case, since the attachment / detachment of the cassette oil tank is performed using the connector with the automatic opening / closing valve, oil can be collected and supplied without leaking the insulating oil.

When a cassette oil tank is used, oil can be collected without having to measure the amount of oil collected.

Further, since the cassette oil tank is small, it is easy to carry.

Further, oil can be collected and supplied without using any tools or jigs.

In this case, the oil sampling means is connected to an oil guide pipe in the oil amount adjusting device provided in the container by branching a connector with an automatic opening and closing valve, and the automatic oil opening and closing valve of the cassette oil tank is connected to the connector with the automatic opening and closing valve. When the connector with the connector is connected, components such as the cover of the oil amount adjusting device can be shared and the oil collecting means can be provided in the same installation place.

The cassette oil tank is provided with a connector with an automatic opening / closing valve at one end of the cassette oil tank main body for storing the insulating oil, an opening at the other end of the cassette oil tank main body, and a closed cap. In this structure, the insulating cap can be easily opened to take out the insulating oil from the cassette oil tank main body or to fill the cassette oil tank main body with the deaerated insulating oil.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an oil-immersed transformer for an instrument with oil-collecting means will be described in detail with reference to FIGS. Parts corresponding to those in FIG. 3 and FIG. 4 described above are denoted by the same reference numerals and described.

In the oil-introducing transformer for an instrument with oil collecting means of the present embodiment, the oil collecting means 16 is connected to the oil guide pipe 4 in the oil amount adjusting device 5 provided in the container 1 via the oil guide pipe 4. Connector with socket type automatic opening and closing valve at the tip of
1 is branched and connected to the connector 21 with the automatic opening / closing valve.
And a connector 23 with a plug-type automatic opening / closing valve of the cassette oil tank 22. The cassette oil tank 22 is provided with a connector 23 with an automatic opening / closing valve at the lower end of a cassette oil tank main body 24 containing insulating oil, and a small-diameter opening 25 at the upper end of the cassette oil tank main body 24. Are closed by a sealing cap 26. The branch connection portion of the connector 21 with an automatic opening and closing valve is supported on the support base 11 via a branch block 27.

As described above, the oil collecting means 16 is connected to the transformer main body 2.
A connector 21 with an automatic opening and closing valve provided in the container 1 containing the insulating oil 3 and a cassette oil tank 22 to which a connector 23 with an automatic opening and closing valve is connected and attached to the connector 21 with the automatic opening and closing valve. The cassette oil tank 22 is removed from the connector 21 with the automatic opening / closing valve provided on the container 1, and another cassette oil tank containing deaerated insulating oil is connected.

By doing so, the cassette oil tank 22
The oil can be easily collected and refueled by attaching and detaching the oil.

In this case, since the attachment / detachment of the cassette oil tank 22 is performed using the connectors 21 and 23 with automatic opening / closing valves, oil can be collected and supplied without leaking the insulating oil 3.

When the cassette oil tank 22 is used,
Oil can be collected without having to measure the amount of oil collected.

Since the cassette oil tank 22 is small,
Easy to carry.

In addition, oil can be collected and supplied without using any tools or jigs.

In this case, in particular, as in the present embodiment, the oil sampling means 16 is connected to the oil guide pipe 4 in the oil amount adjusting device 5 provided in the container 1 by branching the connector 21 with an automatic opening and closing valve. When the connector 23 with the automatic opening / closing valve of the cassette oil tank 22 is connected to the connector 21 with the automatic opening / closing valve, parts such as the cover 10 of the oil amount adjusting device 5 are shared, and the installation location is the same, so that the oil sampling means 16 is used. Can be provided.

The cassette oil tank 22 is provided with a connector 23 having an automatic open / close valve at one end of a cassette oil tank main body 24 for storing insulating oil, and an opening 25 at the other end of the cassette oil tank main body 24. When the opening 25 is closed by the sealing cap 26, the sealing cap 26
By opening the opening, it is possible to easily take out the insulating oil from the cassette oil tank main body 24 or fill the cassette oil tank main body 24 with the deaerated insulating oil.

The connector 21 with an automatic opening / closing valve
Is not limited to being provided in the oil amount adjusting device 5, and separately from the oil amount adjusting device 5, for example, in FIG.
It can also be provided on the upper part of the device.

In the above embodiment, the case where the present invention is applied to an oil-immersed transformer for an instrument with oil-collecting means has been described. However, the present invention is applied not only to an oil-immersed transformer for an instrument but also to a normal oil-immersed transformer. Can be similarly applied. The oil-immersed transformer includes both an oil-immersed transformer and an oil-immersed current transformer.

[0039]

According to the oil-immersed transformer with oil collecting means of the present invention, the following excellent effects can be obtained.

In the present invention, the oil collecting means is provided with a connector having an automatic opening and closing valve provided in a container accommodating the transformer main body together with the insulating oil, and a cassette oil for connecting and attaching the connector with the automatic opening and closing valve to the connector with the automatic opening and closing valve. The tank is configured with a tank, so at the time of oil collection, the cassette oil tank is removed from the connector with the automatic opening and closing valve provided on the container, and another cassette oil tank containing deaerated insulating oil is connected, so that the cassette oil tank can be easily attached and detached. Oil can be collected and refueled.

In this case, since the attachment and detachment of the cassette oil tank is performed using the connector with the automatic opening / closing valve, oil can be collected and supplied without leaking the insulating oil.

When a cassette oil tank is used, oil can be collected without measuring the amount of oil to be collected.

Further, since the cassette oil tank is small, it is easy to carry.

Further, oil can be collected and supplied without using any tools or jigs.

In addition, a connector with an automatic opening and closing valve is branched and connected to an oil collecting means, particularly an oil guide pipe in an oil amount adjusting device provided in the container, and the automatic opening and closing of the cassette oil tank is connected to the connector with the automatic opening and closing valve. When the structure is such that a connector with a valve is connected, parts such as a cover of the oil amount adjusting device can be shared, and the oil collecting means can be provided in the same installation place.

The cassette oil tank is provided with a connector with an automatic opening / closing valve at one end of the cassette oil tank main body for storing the insulating oil, an opening at the other end of the cassette oil tank main body, and a cap for sealing. In this structure, the insulating cap can be easily opened to take out the insulating oil from the cassette oil tank main body or to fill the cassette oil tank main body with the deaerated insulating oil.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of an instrument oil-immersed transformer with oil sampling means to which the present invention is applied.

FIGS. 2A and 2B are a plan view and a partial vertical sectional exploded view of a cassette oil tank used in this embodiment.

FIG. 3 is a vertical sectional view of a conventional oil-filled transformer for an instrument with oil-collecting means.

FIG. 4 is a vertical sectional view of a main part of a conventional oil-filled transformer for an instrument with oil collecting means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Transformer main body 3 Insulating oil 4 Oil guide pipe 5 Oil amount adjusting device 6 Connector 7 Oil guide pipe 8 Oil amount adjusting container 9 Connector 10 Cover 11 Supporting stand 12 Oil guide pipe 13 Connector 14 Oil guide pipe 15 Valve 16 Oil sampling Means 17 Adapter 18, 19 Valve 20 Lid with lid 21 Connector with automatic opening and closing valve 22 Cassette oil tank 23 Connector with automatic opening and closing valve 24 Cassette oil tank body 25 Opening 26 Sealing cap 27 Branch block

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01F 27/00 H01F 27/12

Claims (3)

(57) [Claims] 1. A transformer main body is installed in a container, and the transformer main body is insulated by insulating oil contained in the container,
An oil-immersed transformer with an oil sampling means provided with oil sampling means for sampling the insulating oil in the container, wherein the oil sampling means includes a connector with an automatic opening and closing valve provided in the container, and a connector with the automatic opening and closing valve. And a cassette oil tank connected to and attached to a connector having an automatic opening and closing valve. 2. The oil collecting means according to claim 1, wherein said connector with an automatic opening and closing valve is provided by branching connection to an oil guide pipe in an oil amount adjusting device provided in said container, and said cassette with said connector with automatic opening and closing valve is provided. The oil-immersed transformer with oil sampling means according to claim 1, wherein the oil tank has a structure to which the connector with the automatic opening and closing valve is connected. 3. The cassette oil tank, wherein the connector with the automatic opening and closing valve is provided at one end of a cassette oil tank main body for storing insulating oil, and an opening is provided at the other end of the cassette oil tank main body. The oil-immersed transformer with oil collecting means according to claim 1 or 2, wherein the portion has a structure closed by a sealing cap.