JPS60249033A - Monitor device of dissolved gas in oil - Google Patents

Abstract

PURPOSE:To prevent adverse influences caused by a dissolved gas by providing a space generating means and a vibrator on a gas extracting chamber, and communicating a gas detecting chamber having a gas detecting element with this gas extracting chamber. CONSTITUTION:A bellows 10 is moved upward by operating a bellows driving part 11, and a gas extracting chamber 3, an oil feed-in pipe 5, and an oil feed-out pipe is filled with an insulating oil 2. Subsequently, opening and closing valves 6, 7 are opened, and the insulating oil 2 in the gas extracting chamber 3 is circulated between the gas extracting chamber 3 and a tank 1 by a pump 8. Thereafter, the pump 8 is stopped, the bellows driving part 11 is driven in a state that the opening and closing valves 6, 7 are closed, a space A under a reduced pressure is generated in the upper part of the inside of the gas extracting chamber 3, and a dissolved gas in oil is extracted to the space A by a vibrator 12. Subsequently, the vibration of the vibrator 12 is stopped, a clean air is made to flow into the space A by opening valves 15, 16 and 18, the valve 18 is closed and the valve 17 is opened, the insulating oil 2 in the tank 1 is made to flow into the gas extracting chamber 3 by opening the valve 6, a mixed gas of the dissolved gas in oil and air is fed to a detecting chamber 9, and the components are measured by a gas detecting element 20.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a monitoring device for dissolved gas in oil, and in particular, to a device for preventing dissolved gas in insulating oil used for the measurement from mixing into a tank of an oil-filled electrical equipment. It is related to.

[Prior art]

Conventionally, as a monitoring device for gas dissolved in oil to monitor gases caused by internal abnormal phenomena in oil-filled electrical equipment and detect internal abnormal phenomena at an early stage, for example, the
The one described in the No. Publication is known. This dissolved gas in oil monitoring device is equipped with a gas detection chamber for detecting dissolved gas in oil in the middle of a dissolved oil circulation passage whose both ends are connected to an oil-filled electrical equipment tank. The gas component dissolved in the oil in the upper space is measured using a gas detection element. In the case of this dissolved gas monitoring device in oil, the upper space within the gas detection chamber was attached to an insulating oil circulation passage. This occurs under reduced pressure by adjusting the throttle valve, pump for insulating oil circulation, etc., and the dissolved gas in the oil that bubbles in the upper space passes through the insulating oil circulation passage and enters the oil-filled electrical equipment tank. This has the disadvantage that special anti-foaming measures must be taken because the foam can enter and have a negative impact on oil-filled electrical equipment.

[Summary of the invention]

This invention was made for the purpose of eliminating the above-mentioned drawbacks, and includes a gas extraction chamber in which insulating oil containing dissolved gas remains, a space generating means for creating a space inside the gas extraction chamber, and a space generating means for creating a space inside the gas extraction chamber; Equipped with a vibrator that forcibly extracts dissolved gas in the insulating oil.

In addition, by communicating with this extraction chamber a gas detection chamber having a gas detection element for measuring the components of dissolved gas, the internal volume of the gas extraction chamber is increased and a space under reduced pressure is created within the gas extraction chamber. The gas dissolved in oil accompanied by foaming can be extracted into this space and the gas dissolved in oil can be sent to the gas detection chamber, so that the foamed gas dissolved in oil will not enter the oil-filled electrical equipment tank. An object of the present invention is to provide a monitoring device for gas dissolved in oil that does not adversely affect oil-filled electrical equipment.

[Embodiments of the invention]

Hereinafter, the dissolved gas in oil monitoring device of this invention (hereinafter referred to as “dissolved gas monitoring device in oil”) will be described.

It is abbreviated as a monitoring device. ) will be described with reference to the drawings. The figure is a structural explanatory diagram showing one embodiment of the present invention, and shows an oil-filled electrical equipment tank (hereinafter abbreviated as tank) l.
Electrical equipment (not shown) is housed in an insulating oil tank. In the vicinity of the tank 1, there are provided a gas extraction chamber 3 in which insulating oil is retained, and a gas detection chamber 3 communicating with the gas extraction chamber 3. An insulating oil circulation passageway is formed between the gas extraction chamber 3 and the tank/tank, through which the insulating oil circulates. This insulating oil circulation passage is the oil delivery pipe Hiroshi and the oil delivery pipe! It is made up of.

An on-off valve 6.7 is installed in the middle of the oil delivery pipe V and the oil delivery pipe J, respectively. Furthermore, an insulated oil circulation pump S is installed between the on-off valve 7 of the oil delivery piping and the gas extraction chamber 3. And with this pump t,
The insulated oil tank is circulated between the tank / and the gas extraction chamber J,
The insulating oil tank in the gas extraction chamber 3 is extracted from the homogenized insulating oil tank in the tank l.

At the bottom of the gas extraction chamber J, there are provided a bellows 10 that changes the internal volume of the gas extraction chamber 3, and a bellows drive unit /l that reciprocates the bellows IO. and,
When the bellows lθ is moved downward by the operation of the bellows drive unit/I, a space under reduced pressure is created in the upper part of the gas extraction chamber 3. In this way, the bellows IO and the bellows drive section // constitute a space generating means.

In addition, a vibrator/J is provided in the gas extraction chamber 3, and this vibrator/J is vibrated to forcibly remove the dissolved gas in the insulating oil λ (hereinafter referred to as dissolved gas in oil). It is designed to extract to.

The gas extraction chamber 3 and the gas detection chamber 9 are connected by a gas pipe 13. This gas pipe/? An air pipe /f is connected in the middle. Air is introduced into the gas extraction chamber 3 through the air pipe/U. Gas piping/3. There is an on-off valve in the middle of the air piping/G+! ,
/A, /l, /l are installed respectively. An oil level detector is installed between the on-off valve/j and 74 to detect the oil level height.
9 is installed. When this oil level detector /9 detects the oil level, the valve opens and closes, /! ;, /1. ．． /7 can be closed.

The gas dissolved in the oil in the gas extraction chamber 3 is fed into the gas detection chamber at a temperature of 0.degree. It dissolves in this oil. First, the bellows drive unit l/ is operated to move the °C bellows io upward, and the gas extraction chamber 3. Fill the oil carrier pipe and the inside of the oil delivery pipe V with insulating oil λ. Next, the on-off valve 6.7 is opened and the insulating oil is pumped between the gas extraction chamber 3 and the tank 1 using the pump g so that the insulating oil λ in the gas extraction chamber 3 becomes the insulating oil 3 representative of the tank l. circulate. After that, the pump t is stopped, and with the on-off valves 6 and 7 closed, the tongue is operated manually to create a space A under reduced pressure in the upper part of the gas extraction chamber J. . Next, it is shaken to allow the dissolved gas to reach equilibrium in the space and insulating oil in a short time. Next, the vibration of the vibrator 12 is stopped, and the on-off valve /! r,
Open /A and /l and let clean air flow into space A from air pipe /41.

Next, the on-off valve tg is closed, the on-off valve /7 is opened, and the on-off valve 6 is opened to allow the insulated oil tank in the tank to flow into the gas extraction chamber 3, so that the dissolved gas in the oil in the space A is The mixed gas of air and air is measured by gas detection. Then, when the liquid level detector 19 detects the liquid level, the on-off valve /! ,/
6. /'/, 4 is closed, and the component measurement of dissolved gas in oil is completed.

Note that the means for feeding the mixed gas of melt-in-oil gas and air into the gas detection chamber 9 does not feed into the insulated oil gas extraction N3 as in the above embodiment, but instead uses a bellows IO.
may be moved up.

Further, in the above embodiment, the bellows l is used as the space generating means.
θ, bellows drive unit/l, etc. have been described, but the configuration is not limited to this. For example, by driving a piston-shaped member into a cylindrical gas extraction chamber, a space under reduced pressure may be created in the gas extraction chamber. may be caused.

〔Effect of the invention〕

As explained above, according to the dissolution in oil gas monitoring device of the present invention, the gas extraction chamber is provided with a space generating means and a vibrator,
In addition, by communicating a gas detection chamber having a gas detection element with this gas extraction chamber, the internal volume of the gas extraction chamber is increased, creating a space under reduced pressure within the gas extraction chamber, and bubbling occurs in this space. The gas dissolved in the oil can be extracted and the dissolved gas in the oil can be sent to the gas detection chamber, where the components of the dissolved gas in the oil can be measured. Penetrates into electrical equipment tanks,
It will not have any adverse effect on oil-filled electrical equipment.

[Brief explanation of drawings]

The figure is a structural explanatory diagram showing an embodiment of the dissolved gas in oil monitoring device of the present invention. L...Oil-filled electrical equipment tank, K...Insulating oil, 3...Gas extraction pipe, Hiroshi...Oil delivery piping (insulating oil circulation passage), 3...
Oil carrier hair tube (insulated oil circulation passage). ri...Gas detection chamber, io...Bellows (space generation means)
, //・War bellows drive unit (space generating means). /λ... vibrator, λ0... gas detection element, A... space.

Claims (1)

[Claims] (1) Both ends are connected to the oil-filled electrical equipment tank, and an insulating oil circulation passage is provided in the middle of the insulating oil circulation passage, which serves as a path for circulating the insulating oil in the oil-filled electrical equipment tank. and a gas extraction chamber where it stays. The gas extraction chamber is provided with a gas detection chamber communicating with the gas extraction chamber and having a gas detection element for measuring the components of dissolved gas in the oil in the gas extraction chamber. What is claimed is: 1. A dissolved gas in oil monitoring device, comprising: a space generating means for creating a space inside the device; and a vibrator for forcibly extracting gas dissolved in the oil into the space. (λ) The space generating means is constituted by a reciprocating bellows provided in the gas extraction chamber, and a bellows driving section that reciprocates the bellows. The dissolved gas monitoring device in oil according to item 1.