JPH04313038A - Apparatus for detecting amount of leaking gas - Google Patents

Abstract

PURPOSE:To perform measurement accurately in a short time in a leaking-gas- quantity detecting apparatus for measuring the amount of the leaking gas of a sealed electric apparatus wherein compressing gas is sealed. CONSTITUTION:A container 9 for containing a sealed electric apparatus 1 is formed of a sheet 8 which is supported with a plurality of supporting posts 7. The supporting posts are uprightly provided on a stage plate 5. Gas passing holes 10 and 11 are formed in a ceiling part of the sheet 8 and a part of the stage plate 5. A gas concentration detector 4 is connected to the side of the gas passing hole 11 through a sucking part 4a for gas to be measured.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a gas leakage detection device for measuring the amount of gas leaking from a sealed electrical appliance filled with pressurized gas, such as a high-pressure load switch filled with SF6 gas. be.

0002

2. Description of the Related Art FIG. 4 is a diagram showing a schematic configuration of a conventional gas leak amount detection device of this type. In the figure, 1 is a sealed electrical device as a device to be measured, such as an SF6 gas-filled high-pressure load switch, placed on a pedestal 2, and 3 is a sheet that covers the sealed electrical device 1 and the pedestal 2. , for example, is made of a polymer film material with low gas permeability, such as polyethylene. 4 is, for example, ultraviolet ionized S
F6 A gas concentration detector using a gas leakage measuring device or the like, which communicates with the inside of the seat 3 via the gas suction part 4a to be measured.

As shown in the figure, the conventional gas leakage detection device configured as described above covers a sealed electrical device 1 placed on a pedestal 2 with a sheet 3, and then inhales the gas to be measured. The part 4a is inserted into the sheet 3, and the gas in the sheet 3 is guided to the gas concentration detector 4 to measure the concentration of SF6 gas contained in the gas.
6 Gas leakage amount is detected. Incidentally, the amount of SF6 gas leakage can be determined from the standing time (time for storage in the sheet 3), the volume of the sheet 3 filled with the gas to be measured, and the concentration of SF6 gas contained in the gas to be measured.

0004

[Problems to be Solved by the Invention] Since the conventional gas leak amount detection device is constructed as described above, when the amount of gas sucked into the gas concentration detector 4 from the gas suction portion 4a to be measured is relatively small. , since the measurement sensitivity is not so high, it is necessary to leave it for a long time, and if the shape of the sealed electrical device 1 is complicated because the sheet 3 is soft, the shape may change due to the movement of gas within the sheet 3. In order to suppress the movement of gas, it is necessary to consider the time it takes for the SF6 gas leaked from the sealed electrical equipment 1 to be homogenized in the gas inside the sheet 3, which requires a long time to measure. There was a problem.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a gas leakage detection device that can accurately detect the amount of gas leakage in a short period of time. .

[0006]

[Means for solving the problem] Claim 1 of this invention
The gas leakage detection device consists of a container in which a device to be measured is housed, a material that does not permeate the gas to be measured, and which can maintain a constant shape, and at least two containers each provided on the wall of the container. The gas leak detection device according to claim 2 includes a gas passage hole and a gas concentration detector connected to either one of the gas passage holes, and the gas leak detection device according to claim 1 is the gas leak detection device according to claim 1. Both gas passage holes are each provided with a valve, and when the valve provided in the gas passage hole on the side to which the gas concentration detector is connected opens, the other valve opens in conjunction.

[0007]

[Operation] The container of the gas leak detection device in this invention is
By maintaining a constant shape, the state of the gas is prevented from being disturbed by the outside air introduced into the container during suction, and by providing at least two gas passage holes, a constant volume of gas can be sucked. At the same time, gas equal to the amount of suction is introduced from the outside, and the leaked gas is easily homogenized in a short time.

[0008]

[Example] Example 1. Embodiment 1 FIG. 1 is a diagram showing a schematic configuration of a gas leak amount detection device in Example 1 of the present invention. In the figure, a sealed electric device 1 as a device to be measured, a gas concentration detector 4, and a gas suction part 4a to be measured are the same as those of the conventional device shown in FIG. Reference numeral 5 denotes a base plate having rigidity capable of withstanding the load of the sealed electrical equipment 1; 6, a pedestal protruding from the base plate 5 to support the sealed electrical equipment 1; and 7, the base plate 5.
Supports 8 are erected from multiple ends of the support support 7, and are sheets that form a container 9 for housing the sealed electrical equipment 1 on the base plate 5, similar to the seat 3 of the conventional device. Made of polyethylene polymer film material. 10,
Reference numeral 11 denotes gas passage holes formed in the ceiling of the sheet 8 and the base plate 5, and one of the gas passage holes 11 is connected to the gas suction section 4a to be measured.

Next, the operation of the gas leakage detection device according to the first embodiment of the present invention constructed as described above will be explained. First, the sealed electrical device 1 is placed on the pedestal 6 inside the container 9 and left for a predetermined period of time. Thereafter, the gas to be measured suction section 4a is connected to the gas passage hole 11, and the gas to be measured is introduced into the gas concentration detector 4 to measure the concentration of SF6 gas. While the gas to be measured is introduced into the gas concentration detector 4, the outside air is passed through the gas passage hole 1 to compensate for the pressure drop inside the container 9.
The container 9 is replenished from 0.

[0010] At this time, there is almost no temperature difference between the outside air and the gas to be measured in the container 9, and the amount of leakage of SF6 gas is usually very small, so there is no density difference. Since the sheet 8 forming the . By setting this, the SF6 gas leaking from the sealed electrical equipment 1 is homogenized in the measured gas in a short time without restricting the movement of gas, and the amount of gas leakage can be detected accurately in a short time. It becomes possible to do so.

Example 2. Although the container 9 in the first embodiment is formed of a sheet 8 supported by a plurality of support columns 7, the intended purpose can be achieved even if the container is configured as shown in FIG. In the figure, reference numeral 12 denotes a storage section that is open at the top and has a gas passage hole 12a at the bottom, and 13 is a lid section that partially has a gas passage hole 13a.
The container 15 is constructed by closing the opening of the container 2. Note that the storage section 12 and the lid section 13 are made of organic and inorganic glass or metal plates. In this way, the container 15 is made of a rigid storage part 1 such as a metal plate.
2 and the lid part 13, the container 15 can maintain a constant shape even more easily than the container 9 in the first embodiment.

Example 3. FIG. 3 is a sectional view showing the container part of the gas leakage detection device in Example 3 of the present invention,
It is almost the same as the container part of Example 2 in FIG. 2, but differs in that electromagnetic valves 16 and 17 are provided in the gas passage hole 12a of the storage part 12 and the gas passage hole 13a of the lid part 13, respectively. . The solenoid valve 16 is configured to open when the gas suction portion 4a to be measured is connected to the gas communication hole 12a, and to open the solenoid valve 17 in conjunction with the opening of the solenoid valve 16. In this way, both solenoid valves 1
6 and 17 are interlocked, the gas communication hole 13a side is opened and outside air is replenished only while the gas to be measured is being led to the gas concentration detector 4 from the gas communication hole 12a. Therefore, SF leaked from the sealed electrical equipment 1 into the container 15
6. It is possible to prevent the gas from further diffusing outside the container 15 through the gas communication hole 13a, and the measurement accuracy is further improved.

[0013]

As described above, according to claim 1 of the present invention, there is provided a container in which a device to be measured is housed, which is made of a material that does not allow the gas to be measured to pass through, and which can maintain a constant shape; At least two
According to claim 2, in claim 1, both gas passage holes each include a valve. When the valve installed in the gas passage hole on the side connected to the gas concentration detector opens, the other valve opens in conjunction with it, so the amount of gas leakage can be detected accurately in a short time. It is possible to provide a gas leakage detection device that can detect gas leakage.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a schematic configuration of a gas leakage detection device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of a container as a main part of a gas leakage detection device in Example 2 of the present invention.

FIG. 3 is a cross-sectional view showing the configuration of a container as a main part of a gas leakage detection device in Example 3 of the present invention.

FIG. 4 is a diagram showing a schematic configuration of a conventional gas leakage detection device.

[Explanation of symbols]

1 Sealed electrical equipment 4 as a device to be measured Gas concentration detectors 9, 15 Containers 10, 11, 12a, 13a Gas passage holes 16, 17
solenoid valve

Claims (2)

[Claims] Claim 1: A container in which a device to be measured is housed and which is made of a material that does not transmit a gas to be measured and can maintain a constant shape, and at least two gas passage holes provided in each wall of the container. and a gas concentration detector connected to either one of the gas passage holes. [Claim 2] Both gas passage holes are each provided with a valve, and when the valve provided in the gas passage hole on the side to which the gas concentration detector is connected opens, the other valve opens in conjunction with the opening. The gas leakage detection device according to claim 1, characterized in that it is configured as follows.