JPS60234407A - Gas recovering device for gas insulated equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a gas insulating device used to recover gas in a container of gas insulated equipment such as a gas insulated switchgear installed in an electrical station such as a substation. This invention relates to a gas recovery device for equipment.

[Prior Art] When performing maintenance, inspection, or repair on gas-insulated equipment, such as gas-insulated equipment installed in electric stations such as power plants and substations, it is necessary to remove the gas in the container of the gas-insulated equipment. Once the gas is collected, the equipment container is refilled with the recovered gas after the equipment has been repaired or inspected. Figure 2 schematically shows the configuration of a conventional gas recovery device used in such cases. In the figure, 1 is a metal high-pressure gas container;
performs a gas recovery operation of recovering the insulating gas in the container 3 of the gas insulated equipment into the gas container 1, and a recharging operation of refilling the gas in the gas container into the container 3 of the gas insulated equipment] 4 is a vacuum pump that evacuates the inside of the container 3 when it is filled with gas; 5 to 10 are stop valves.

This gas recovery device is installed near a container 3 of a gas insulated device during maintenance and inspection of the device, and its device connection port 11 is connected to a gas charging/exhausting port 13 of the container 3 via a hose 12. Next, with the stop valves 5, 8 and 9 closed, the stop valve 6,
7 and 10 are opened to operate the compressor 2, and the gas in the container 3 is sucked and collected into the gas container 1. After gas recovery is completed, stop valves 6, 7, and 5 are closed. After maintenance, inspection, and repair of gas insulated equipment is completed, with stop valves 9 and 10 closed, stop valves 6, 7, and 8 are opened, vacuum pump 4 is operated, and the air inside container 3 is exhausted and the container is removed. Make negative pressure inside 3. Next, the stop valve 8 is closed, and the stop valve 9 is opened to allow the insulating gas in the gas container 1 to flow into the container 3. Also, if necessary, the stop valves 7, 8, and 10 are closed, the stop valves 6, 5, and 9 are closed, and the gas remaining in the container 1 is recovered and compressed using the compressor 2, and the container 3 is filled with air. . After filling the container 3 with gas, the stop valves 5, 6, and 7 are closed, and the boss 12 is removed.

In the above gas recovery device, the insulating gas in the container 3 is compressed by the combrella 4 and collected into the metal gas container 1, so it is necessary to use a high-pressure container that is subject to legal regulations as the gas container 1. However, the disadvantage was that the equipment was expensive. Further, when the container 3 of the gas insulated equipment is large, the gas container 1 is also large, which has the disadvantage that it becomes difficult to transport and handle the device.

[Object of the Invention] An object of the present invention is to provide a gas recovery device for gas insulated equipment that can reduce the cost of gas containers and also allows easy transportation and handling of the device. It is in.

[Structure of the Invention] The present invention is a gas recovery device for gas insulated equipment, which includes a gas container and a compressor that sucks insulating gas in the gas insulated equipment and fills the gas container. , the gas container is made of a flexible and airtight material such as plastic or rubber so as to be foldable; Set it to a size that is as large as possible, or larger.

The gas container may be composed of, for example, a single balloon or bag, or a plurality of balloons or bags.

[Operation of the Invention] In the recovery device described above, when recovering gas from a gas insulated device, the gas inside the gas container is expelled to leave the gas container in a state in which substantially no gas exists. Then, the compressor is connected to the gas insulating equipment, and the compressor sucks the insulating gas inside the gas insulating equipment and sends it into the waste container.

The gas container expands as the amount of gas recovered increases, but the capacity of the gas container is set to be large enough to store gas at near atmospheric pressure, so high pressure acts on the gas container. The gas container will not be damaged. The gas container is not subject to legal regulations for high-pressure gas containers, so it can be manufactured at low cost.After the recovered insulating gas is returned to the container of gas-insulated equipment, the gas container can be folded and easily removed. Can be stored.

[Example] The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 2 shows an embodiment of the present invention, and in the figure, parts equivalent to those of the conventional example shown in FIG. 2 are given the same reference numerals. In FIG. 1, reference numeral 20 denotes a frame of the recovery device, and wheels 21 are attached to this frame. A compressor 2 and a vacuum pump 4 are mounted on the pedestal 20 along with valves for controlling the gas system, a safety device, a control panel, and the like. More specifically, the gas suction port 2a of the compressor 2 is connected to the pipe 22. It is connected to the device connection port 11 via the stop valve 7 and the pipe 23. One end of a pipe 24 is connected to the pipe 22, and the other end of the pipe 24 is connected to the vacuum pump 4 via a stop valve 8, and to a gas outlet 26 via a stop valve 9 and a pipe 25. There is. The outlet 2b of the compressor 2 is connected to the gas outlet 26 via the pipe 27 and the stop valve 10.
It is connected to the. Further, one end of a pipe 30 is connected to the middle of the pipe 27, and the other end of the pipe 30 is connected to the device connection port 11 via the stop valve 5 and the pipe 32. Also disposed on the pedestal 20 is a control panel 33 equipped with safety equipment for the vacuum pump and compressor, equipment for controlling the operation of the compressor and vacuum pump, and monitoring instruments. A gas container 40 is connected to the gas outlet 26 . The gas container 40 is a balloon made of a flexible sheet material or film material such as synthetic resin such as polyethylene or rubber.
It consists of a container or a bag that can be folded and stored after use. It is preferable to provide a place on the pedestal 20 to store the folded gas container 40. The capacity of the gas container 40 is set to be large enough to store gas at a pressure close to atmospheric pressure, so that high pressure is not applied to the gas container 40. -For example, 1
Approximately 6 Krt of SF6 gas can be stored in a gas container of 1.5 m".

A cap 41 is attached to the gas container 40, and the cap 41 is detachably connected to the gas outlet 26.

Note that the gas container 40 may be composed of a single balloon or bag, or may be composed of a plurality of balloons or bags. When the volume of the container 3 of the gas insulated equipment is large, it is advantageous to configure the gas container 40 with a plurality of balloons or bags.

The device connection port 11 is connected via a hose 12 to a gas charging/discharging port 13 of a container 3 of the gas insulated device. This gas-insulated equipment is, for example, a gas-insulated switchgear in which equipment necessary to configure a switching circuit, such as a circuit breaker, a disconnector, a grounding device, and a separate transformer, is housed in a container 3. is science fiction
6 gases are filled at near atmospheric pressure.

When recovering the gas in the container 3 using the gas recovery device described above, the gas container 40 from which the internal gas has been expelled is connected to the gas outlet 26, and the equipment connection port 11 is connected to the hose 12.
It is connected to the gas charging/exhausting port 13 of the container 3 of the gas insulated equipment via. Next, with stop valve 8° 9 and 5 closed, stop valve 6 is closed.
．． 7 and 10, operate compressor 2 and remove container 3.
The insulating gas inside is collected into the gas container 40. In this case, the gas container 40 expands as the amount of gas to be recovered increases, but since the capacity of the gas container 40 is set sufficiently large, the pressure inside the gas container 4o is maintained at approximately atmospheric pressure.
High pressure is not applied to the gas container 40. After gas recovery is completed, the stop valves 5, 6 and 7 are closed, and if necessary, the hose 12 is removed.

When refilling the container 3 with the recovered gas, first,
With the stop valves 9 and 10 closed, the stop valves 6, 7 and 8 are opened, and the vacuum pump 4 is operated to evacuate the inside of the container 3 and exhaust the air inside the container 3''. 3. After the vacuum inside the container 3 is completed, the stop valve 8 is closed and the stop valve 9 is opened. At this time, the negative pressure inside the container 3 causes the gas in the gas container 40 to The gas flows into the container 3 and fills the container 3 with gas.If you want to further pressurize the container 3, close the stop valves 10 and 7, open the stop valves 9 and 5, and operate the compressor 2. , the container 3 is pressurized and filled with gas. After the container 3 has been refilled with gas, the stop valves 6, 7, and 5 are closed, and the hose 12 is removed.

Note that gas recovery equipment is often equipped with safety valves, check valves, etc. to ensure safety within the gas system.
Since these are not directly related to the gist of the present invention, their description has been omitted in the above description.

[Effects of the Invention] As described above, according to the present invention, the gas container is made of a flexible and airtight material so as to be foldable, and the capacity of the gas container is at least as large as the gas in the gas insulated equipment. Since the size is set so that gas can be stored at a pressure close to atmospheric pressure, high pressure does not act on the gas container. Therefore, the gas container can be manufactured at low cost, and the cost of the device can be reduced. Furthermore, since the gas container can be folded, transportation and handling of the device can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing an embodiment of the present invention, and FIG. 2 is a block diagram schematically showing the structure of a conventional gas recovery device for gas insulated equipment. 2... Compressor, 3... Gas insulated equipment container,
4... Vacuum pump, 5, 6, 7, 8.9 and 10...
・Stop valve, 40...Gas container. Figure 1 @ Figure 2

Claims (3)

[Claims] (1) In a gas recovery device for gas insulated equipment comprising a gas container and a compressor etc. that collects insulating gas in the gas insulated equipment and fills the gas container, the gas container is made of flexible material such as plastic or rubber. The gas container is configured to be foldable and made of a material having an airtight property, and the capacity of the gas container is set to be large enough to store at least the insulating gas in the gas insulated equipment at a pressure near atmospheric pressure. Gas recovery equipment for gas insulated equipment. (2) The gas recovery device for gas insulated equipment according to claim 1, wherein the gas container is composed of a single balloon or a bag. (3) The gas recovery device for gas insulated equipment according to claim 1, wherein the gas container is composed of a plurality of balloons or bags.