JPH0244239A - Automatically measuring apparatus for gas in oil - Google Patents

Abstract

PURPOSE:To enable automatic measurement at a high accuracy along with a continuous and quick detecting operation by circulating an extraction dissolved gas through a gas extraction container and a gas detection chamber by way of a piping to measure a density of a combustible gas. CONSTITUTION:First, a solenoid valve 15 is closed and three-way solenoid valves 9 and 13 are closed while solenoid valves 4 and 11 are opened to introduce a sample oil 2 to a gas extraction container 3 from an oil filled equipment 1 through a piping 5. When a liquid level detector 6 rises up to a specified position, the valves 4 and 11 are closed. Then, with the valves 9 and 13 open, a gas pump 12 is started to introduce air into the sample oil 2 in the container 3 and a bubbling is performed to extract a dissolved gas. The gas is circulated with a pump 12 through the container 3 and a gas detection chamber 8 by way of pipings 10 and 14 to measure a density of a combustible gas with a gas detector 7. At the end of the measurement, with the valves 9 and 13 closed, a cleaning of air in the detector 7 is performed and the valves 11 and 15 are opened to discharge the sample oil 2' to an exhaust tank 16'. At the end of the detection, the valves 11 and 15 are closed to stop the pump 12.

Description

[Detailed Description of the Invention] A. Industrial Application Field The present invention is a method for automatically measuring the concentration of flammable gases in dissolved gas in oil of oil-filled equipment filled with insulating oil, such as transformers, rectifiers, and capacitors. This invention relates to an automatic measuring device for measuring gas in oil.

B3 Summary of the Invention The present invention provides a gas extraction container that accommodates sample oil collected from oil-filled equipment, a gas detection chamber that accommodates a gas detector that measures combustible gas concentration, and the gas extraction container and the gas detection chamber. At the same time, air was introduced and dissolved gas in the sample oil was extracted and circulated by a gas pump to measure the concentration of flammable gas in the dissolved gas, and then the sample oil was discharged into a drain oil tank. This is an automatic gas-in-oil measurement device that performs gas detection operations continuously and quickly, and eliminates the need for oil treatment.

C0 Prior Art Conventionally, when measuring the concentration of flammable gas in dissolved gas in the oil of oil-filled equipment, as shown in FIG. Oil collection container 2
3, and took it home for analysis using a gas chromatograph.

Problems to be solved by the D0 invention In such conventional measurement methods, most of the work from collecting the sample oil to measuring the flammable gas concentration is done manually, and the measurement takes too much time. There were issues such as:

The present invention was made in order to solve the problems of the conventional technology, and an object of the present invention is to provide an automatic gas-in-oil measuring device that performs gas detection operations continuously and quickly and eliminates the need for oil treatment. shall be.

E8 Means for Solving Problems In order to achieve the above object, the automatic gas-in-oil measurement device of the present invention includes a gas extraction container that accommodates sample oil collected from oil-immersed equipment, and a gas extraction container that measures the concentration of combustible gas. A gas detection chamber housing a gas detector to be measured is communicated with the gas extraction container and the gas detection chamber, and air is introduced, and the dissolved gas in the sample oil is extracted and circulated by a gas pump to remove combustible gas in the dissolved gas. The concentration of toxic gases is measured, and then the sample oil is discharged into an oil drain tank.

The sample oil collected from the F0 working oil-filled equipment is stored in a gas extraction container,
Air is introduced using a gas pump to perform bubbling and extract dissolved gas. The extracted dissolved gas is circulated between the gas extraction container and the gas detection chamber using a gas pump, and the concentration of combustible gas is measured using a gas detector. After the measurement is completed, the sample oil is discharged into the drain tank, and gas detection operations are performed continuously and quickly.

G Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment of the automatic gas-in-oil measurement device according to the present invention. In FIG. It is connected to oil-filled equipment via a first pipe 5 provided with.

The gas extraction vessel 3 is provided with a curved surface detector 6 .

One side of the gas detection chamber 8 housing the gas detector 7 is communicated with the upper part of the gas detection container 3 via a first three-way electromagnetic valve 9 and a second pipe 10 . A second solenoid valve 11 is provided between the first three-way solenoid valve 9 and the gas extraction container 3, and the opening and closing of the second solenoid valve +1 opens and closes the second pipe IO with the outside. The other side of the gas detection chamber 8 is communicated with the upper part of the gas extraction container 3 through a third pipe 14 via a gas pump 12 and a second three-way solenoid valve 13 .

A third electromagnetic valve 15 is provided at the bottom of the gas extraction container 3,
By opening the third solenoid valve 15, the sample oil 2 is discharged from the gas extraction container 3 into the drain oil tank 16. The input/output device I7 is a device that operates each electromagnetic valve, the gas pump 12, etc., and outputs the measured value of the concentration of combustible gas from the gas detector 7.

FIG. 2(A) shows the closed state of the three-way solenoid valves 9 and 13, with the gas extraction container 3 side in the closed state and the atmosphere side and the gas detection chamber 8 side in communication.

Further, FIG. 2(B) shows an open state, in which the atmosphere side is open and the gas extraction container 3 side and the gas detection chamber 8 side are in communication.

Next, the operation of this automatic gas-in-oil measuring device will be explained.

Close the third solenoid valve I5, close the first three-way solenoid valve 9 and second three-way solenoid valve 13 as shown in FIG. 2(A), and open the first solenoid valve 4 and second solenoid valve II. Then, the sample oil 2 is transferred from the oil-filled device I through the first pipe 5 to the gas extraction container 3.
to be introduced. Then, when the oil level detector 6 rises to a predetermined position, the first solenoid valve 4 and the second solenoid valve 11 are closed.

Next, the first three-way solenoid valve 9 and the second three-way solenoid valve 13 are opened as shown in FIG. 2(B), and the gas pump 12 is opened.
is activated to introduce air into the sample oil 2 in the gas extraction container 3 and perform bubbling to extract dissolved gas. The extracted dissolved gas is circulated between the gas extraction container 3 and the gas detection chamber 8 via the second pipe IO and the third pipe 14 by the gas pump I2, and the concentration of the combustible gas is measured by the gas detector 7.

When the measurement is finished, the first three-way solenoid valve 9 and the second three-way solenoid valve 13 are closed as shown in FIG. Valve II and third electromagnetic valve I5 are opened to discharge sample oil 2 into drain oil tank 16.

When the end of discharge is detected, the second solenoid valve 11 and the third solenoid valve I5 are closed, and the gas pump 12 is stopped.

H1 Effects of the invention As described above, the present invention extracts a sample oil, stores it in an extraction container, introduces gas into the extraction container, and extracts dissolved gas by bubbling with a gas pump. The dissolved gas is circulated through the gas extraction container and gas detection chamber by a gas pump, and the concentration of combustible gas in the dissolved gas is measured by a gas detector.After the measurement, the sample oil is transferred to the drain tank. This system allows detection operations to be performed continuously and quickly without the need for oil treatment, and has the advantage of being able to automatically measure with high sensitivity even when the amount of gas in the oil is small. It will be done.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing an embodiment of this automatic gas-in-oil measurement device, Figure 2 is a state diagram showing the operation of the three-way solenoid valve in the open and closed states, and Figure 3 is a diagram showing the state of dissolved gas in conventional oil-immersed equipment. FIG. 3 is a diagram showing a method of collecting sample oil for measuring gas. I...Oil filled equipment, 2...Sample oil, 3...Gas extraction container, 4...First solenoid valve, 5...First piping, 6...
Oil level detector, 7... Gas detector, 8... Gas detection chamber, 9... First three-way solenoid valve, 10... Second piping, 1
1...Second solenoid valve, I2...Gas pump, 13...
・Second three-way solenoid valve, 14...Third piping, 15...
Third solenoid valve, 16... drain oil tank, 17... input/output device. 1 Fig. 1 Oil-filled equipment 2 Sample oil 3 Gas extraction container 4 First solenoid valve 5 First pipe 6 Curved surface detector 7 Gas detector 8, Kaz detection chamber 9, first three-way solenoid valve] b 0 Second pipe Third solenoid valve 2 Gas pop 3 Second three-way solenoid valve 4 Third piping 5 Third solenoid valve 6 Drain oil tank 7 Input/output device Figure 2, Figure 3

Claims (1)

[Claims] (1) A gas extraction container that stores sample oil collected from oil-filled equipment, a gas detection chamber that stores a gas detector that measures the concentration of combustible gas, and a communication between the gas extraction container and the gas detection chamber; An automatic gas-in-oil measuring device comprising: a gas pump that introduces air to extract and circulate dissolved gas in the sample oil; and an oil drain tank that discharges the sample oil after measurement from the gas extraction container. .