JPH0534326A - Device for measuring gas within oil - Google Patents

Abstract

PURPOSE:To obtain a device can measure a mixed gas accurately in a short time without increasing the size of an accessory device by extracting a dissolved mixed gas within an insulation oil. CONSTITUTION:The title item is provided with an extraction equipment 3 which extracts a multi-component gas which is dissolved into an insulation oil sampled by an oil-filled electrical equipment, a separation column 15 which separates the extracted multi-component gas into blocks each including a single component or plural components, a feed pump 1 which feeds the multi-component gas from the extraction equipment 3 to the separation column 15, and a plurality of gas sensors 6a, 6b, and 6c with different output characteristics for each gas component concentration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring gas in oil, and more specifically, for early detection of abnormalities such as local overheating and partial discharge occurring inside oil-filled electrical equipment such as transformers. The present invention relates to an in-oil gas measuring device for measuring the concentration of multi-component gas dissolved in oil and the total gas concentration.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional gas-in-oil measuring device,
3 is an extractor for extracting multi-component gas dissolved in oil from insulating oil,
Reference numeral 4 is a measuring pipe for measuring a part of the extracted mixed gas contained in the extractor 3, 1 is an air pump for feeding air for zero adjustment of the gas sensor or multi-component gas in the measuring pipe 4 from the outside of the device to the separation column, 5 Is a separation column that separates the extracted multi-component gas into individual component gases, 6 is a single gas sensor that detects each of the separated component gases and has a similar sensitivity to each component, and 7 is a gas sensor 6 A signal processing unit that processes electric signal output, 8 is a display unit that displays the measurement result processed by the signal processing unit 7, and 9 is a valve that switches the air flow path from the air pump 1. The gas-in-oil measuring device 10 is composed of the above-mentioned elements.

FIG. 4 shows an electric signal output when the sensor 6 detects each component gas after the gas is separated by the extractor 3 and separated by the separation column 5.

Next, the operation will be described. In FIG. 3, air for adjusting the gas sensor zero is sent from the outside of the apparatus by an air pump 1 through a pipe 2 to a separation column 5 having a long length. Similarly, the mixed gas dissolved in oil is extracted in the extractor 3, and is metered to a fixed amount by the metering pipe 4 included in the extractor 3. The measured mixed gas is sent to the separation column 5 together with air, which is the carrying gas sucked by the air pump 1 from the outside of the apparatus by switching the flow path of the valve 9, and is separated into each gas component alone. For each gas component,
The gas sensor 6 detects each of the separated gas components and outputs an electric signal (FIG. 4) proportional to the gas concentration to the signal processing unit 7. The signal processing unit 7 calculates and converts the multi-component gas concentration in oil and the total gas concentration, and the measurement result is displayed on the display unit 8.

[0005]

The conventional device for measuring gas in oil is constructed as described above, and separates the mixed gas into a single component gas and detects each gas component by a single gas sensor. It was necessary to lengthen the length of 5. In addition, when the separation gas is a multi-component gas, it is necessary to connect and use a plurality of columns in parallel or in series, which complicates the flow channel structure and requires a long time for measurement. Furthermore, the length of the separation column 5 increases the flow path resistance, requires a pump with a large discharge pressure for the air pump 1, requires a large column temperature adjusting oven, and the like. There was a problem that was difficult to apply to.

The present invention has been made in order to solve the above-mentioned problems, the flow passage structure is simple, the measurement can be performed in a short time, and a large-sized air pump or column temperature adjusting oven is unnecessary. The object is to obtain a gas-in-oil measuring device that is easy to apply to portable equipment.

[0007]

The gas-in-oil measuring apparatus according to the present invention has an output characteristic for each gas component instead of a separation column for separating a gas component into a single gas component and a single gas sensor. A plurality of different gas sensors and a separation column.

[0008]

According to the present invention, the multi-component gas is separated into a single component gas or a block containing several kinds of gas components by using a separation column and a plurality of sensors having different output characteristics.

[0009]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 5 is a separation column having a short length, 6a
6c show a plurality of gas sensors having different output characteristics for each gas component. In addition, the same reference numerals as in FIG. 3 indicate the same parts.

In FIG. 2, a, b and c are separation columns 5.
The gas separated by the plurality of gas sensors 6a, 6b, 6
The electric signal output when detected by c is shown.

Next, the operation will be described. In FIG. 1, the operation until the multi-component gas is sent to the separation column 15 is the same as that of the conventional apparatus. Separation column 1 for multi-component gas
After passing through 5, the component gas is separated or divided into blocks containing several kinds of gas components. Gas sensors 6a, 6b, 6
c is a sensor having different output characteristics with respect to the gas component.
Generally, a gas sensor does not show sensitivity to only a single component, but shows a high sensitivity to a specific component as compared with other components. In the example of FIG. 2, the gas sensor 6a mainly shows sensitivity to a specific component and outputs an electric signal a proportional to the gas concentration to the signal processing unit 7. As is apparent from the electric signal output a, the sensor 6a has a characteristic of being particularly sensitive to the gas component of the first peak output. Similarly, gas sensor 6
b and 6c also show sensitivity mainly to other gas components, and output electric output signals b and c to the signal processing unit 7, respectively. The signal processing unit 7 calculates the gas component concentration in oil and the total gas concentration by performing an arithmetic processing unit in consideration of the fact that some gas sensors output a large value for a specific gas, and displays the result. It is displayed on the part 8.

[0012]

As described above, according to the present invention, since the separation column and the plurality of sensors having different output characteristics with respect to each gas component are provided, the flow channel structure is simplified and the measurement can be performed in a short time. effective.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a first embodiment of the present invention.

FIG. 2 is an electric signal output characteristic diagram of that of FIG.

FIG. 3 is a circuit diagram of a conventional gas-in-oil measuring device.

4 is an electric signal output characteristic diagram of that of FIG. 3. FIG.

[Explanation of symbols]

 1 Air Pump 3 Extractor 6a-6c Gas Sensor 7 Signal Processor 8 Display 15 Separation Column

Claims (1)

Claim: What is claimed is: 1. An extractor forcibly extracting a multi-component gas dissolved in insulating oil collected from an oil-filled electrical device, and a single component of the extracted multi-component gas and several types of components. A separation column for separating into any of the blocks containing a gas component, a pump for sending the multi-component gas from the extractor to the separation column, a plurality of gas sensors having different output characteristics for each gas component concentration, and these Gas measuring device in oil, comprising a signal processing unit for processing an electric signal output of the gas sensor of 1. and a display unit for displaying a result of the signal processing.