JPH0529156A - Gas insulated eletric equipment - Google Patents

Abstract

PURPOSE:To gassify refrigerant of incompressible liquid imporegnated in an equipment main body for recollection in a short time in a gas insulated electric equipment device which houses the equipment main body with insulation gas in a container and uses incompressible liquid as a cooling medium. CONSTITUTION:The air which circulates through a pipeline 7 by a fan 8 is heated with a heater 9. A coil group 2b is heated with the heated air so as to increase its temperature. The refrigerant of incompressible liquid impregnated in the coil group 2b is gasified by raising the temperature of the heated air so as to take out. The gas is cooled with a heat exchanger 10 and liquefied with a trap 11 and collected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated electric equipment device, such as an SF ₆ gas-insulated transformer, which houses an equipment body together with an insulating gas in a container and uses an incompressible liquid as a cooling medium. .

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing a schematic structure of a conventional SF ₆ gas insulated transformer of this type. In the figure, 1 is a container, 2
Is a transformer as the main body of the equipment housed in the container 1, which is composed of an iron core 2a, a coil group 2b and a lead 2c. A bushing 3 has one end connected to the transformer 2 via the lead 2c and the other end arranged outside the container 1.
Is filled in the container 1, for example, perfluorocarbon (C ₈ F
A gas of an incompressible refrigerant such as ₁₆₀ ), 5 is a blower connected to the pipe 5a communicating with the inside of the container 1, and 6 is a vacuum pump connected to the pipe 6a communicating with the inside of the container 1.

The conventional SF ₆ gas-insulated transformer configured as described above collects the SF ₆ gas and the liquid incompressible refrigerant accumulated at the bottom of the container 1 after the factory test and before shipping the container 1 For the purpose of ensuring safety during assembly part dismantling work such as detaching work of the lead 2c and the bushing 3 performed in the interior of the work, the vacuum pump 5 is operated for a long time and vacuumed by this work, The gas 4 of the incompressible refrigerant having vapor pressure at atmospheric pressure, which is impregnated in the coil group 2b, is removed to the outside of the container 1, and fresh air is blown into the container 1 by the blower 5 during the work.

[0004]

Since the conventional SF ₆ gas-insulated transformer is configured as described above and the dismantling work after the factory test is performed as described above, the uncompressed coil group 2b is impregnated. It takes about 1 to 2 weeks to vaporize the organic refrigerant by evacuation to gasify it.
Further, there is a problem that it is uneconomical because an extremely expensive non-compressible refrigerant must be released into the atmosphere.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas-insulated electric equipment device capable of gasifying and recovering an incompressible refrigerant in a short time. To do.

[0006]

Means for Solving the Problems A gas-insulated electric equipment device according to the present invention comprises heating means for heating the equipment body after recovering insulating gas and raising the temperature, and a gas of an incompressible refrigerant gasified by the temperature rise. And a refrigerant recovery means for liquefying and recovering by cooling.

[0007]

The heating means of the gas-insulated electric equipment according to the present invention heats the body of the equipment after recovering the insulating gas from the container to raise the temperature, and the refrigerant recovery means is gasified by the temperature rise by the heating of the heating means. It is liquefied by cooling the gas of the incompressible refrigerant.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of an SF ₆ gas insulation transformer according to an embodiment of the present invention. In the figure, container 1, transformer 2, iron core 2a, coil group 2b, lead 2c,
The bushing 3 and the gas 4 of the incompressible refrigerant are the same as those of the conventional one in FIG. 7 is a pipe that connects one end and the other end of the container 1, 8 is a blower that is connected to the pipe 7 and generates a circulating flow of air in the container 1 and the pipe 7, and 9 is connected to the pipe 7 and circulates inside A heater for heating the air to be heated, 10 is a heat exchanger for cooling the insulating gas heated by the heater, 11 is a trap connected to the heat exchanger 10,
The heat exchanger 10 and the trap 11 constitute a refrigerant recovery device 20.

In the SF ₆ gas-insulated transformer according to the embodiment of the present invention configured as described above, the SF ₆ gas and the bottom portion of the container 7 are collected during the dismantling work of the assembly parts before the shipment after the factory test. After recovering the liquid incompressible refrigerant as in the conventional case, first, the blower 8 is operated to draw the air in the pipe 7 into the container 1 from one end side, and the air in the container 1 from the other end side. Is introduced to generate a circulating flow. Next, when the heater 9 is operated to heat the air circulating in the pipe 7,
Gradually, the transformer 2 in the container 1 is heated and the temperature rises, the temperature of the coil group 2b becomes high, and the incompressible refrigerant impregnated inside also becomes high temperature and is gasified. Then, this gasified incompressible refrigerant together with the circulation flow by the blower 9 is connected to the pipe 7
It is introduced into the inside and circulated, cooled by the heat exchanger 10 and trapped.
Recovered as a liquid at 11.

FIG. 2 shows an incompressible refrigerant (perfluorocarbon) used in a gas insulation transformer as an incompressible refrigerant.
As shown in the figure, the vapor pressure rises as the temperature rises. Therefore, by heating the coil group 2b to a high temperature, the evaporation of the incompressible refrigerant impregnated inside the coil group 2b is promoted and the recovery efficiency is improved. It gets shorter. Further, since almost all of the incompressible refrigerant impregnated in the coil group 2b can be collected by the trap 11, the disassembly work of the assembled parts after the factory test of the transformer before shipping can be performed safely and economically, and It can be carried out in a short time.

In the above embodiment, the heater 9 for heating the coil group 2b of the transformer 2 is described as the heater 9 for heating the air circulating in the pipe 7.
It may be copper loss supply by heat run of the transformer 2,
Further, if the heat exchanger 10 is equipped with a refrigerator, it is possible to recover the incompressible refrigerant more efficiently. Further, in the above-mentioned one embodiment, the SF ₆ gas insulation transformer was explained as the gas insulation electric equipment device, but if it uses an incompressible liquid as a cooling medium, a gas insulation reactor, a gas insulation capacitor, and a gas insulation busbar. The same effect can be obtained even when applied to any gas-insulated electric device.

[0012]

As described above, according to the present invention, by heating the device body after recovering the insulating gas to raise the temperature, and cooling the gas of the incompressible refrigerant gasified by the temperature rise. Since it has a refrigerant recovery means for liquefying and recovering,
It is possible to provide a gas-insulated electric device device capable of gasifying and recovering a refrigerant of an incompressible liquid in a short time.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an SF ₆ gas insulation transformer according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing a relationship between temperature and vapor pressure of perfluorocarbon used in a gas insulation transformer as an incompressible refrigerant.

FIG. 3 is a diagram showing a schematic configuration of a conventional SF ₆ gas insulation transformer.

[Explanation of symbols]

1 container 2 transformer 2b coil group 4 Incompressible refrigerant gas 8 blower 9 heater 10 heat exchanger

Claims (2)

[Claims] 1. A gas-insulated electrical equipment device in which a device body is housed in a container together with an insulating gas and an incompressible liquid is used as a cooling medium. A gas-insulated electric device apparatus comprising: a means and a refrigerant recovery means for liquefying and recovering the gas of the non-compressible refrigerant gasified by the temperature rise. 2. The heating means and the refrigerant recovery means each are provided in a pipe communicating from one end to the other end of the container, and a fan for circulating air in the pipe through the container, and a circulation in the pipe. 2. A heater for heating air, and a heat exchanger for liquefying and recovering the incompressible refrigerant gas flowing together with the circulating air in the pipe by cooling the incompressible refrigerant gas. Gas insulated electrical equipment equipment.