JPH03253010A - Oil gas extractor - Google Patents

Abstract

PURPOSE:To make the title oil gas extractor relatively easy to carry while enabling a transformer to be easily fitted with a transmission film by a method wherein a single or multiple pipe type gas transmission film is contained in a vessel while the transmission film and an insulating oil pot are structured into one body. CONSTITUTION:When a drain valve 14, the other valves 6, 7 are opened to drive a pump 13, the insulating oil 3 in a transformer is circulated backward from insulating hoses 11b, 11a passing through a vessel 1. By the continuous circulation of the insulating oil 3, the contact time between a transmission film 2 and new oil 3 is elongated thereby stagnating the oil gas in the film 2 while the other valve 9 is opened after the lapse of specific time so that the gas in the film 2 may be led out either by a sensor or a chromatograph for the constituent analysis. Due to the one body structure of the film 2 and a pot of oil 3, the piping for communicating the oil 3 with transformer main body or the connection of oil 3 with the main body by hoses will suffice for the circulation. Furthermore, the title oil gas extractor can be isolated from the transformer main body so that the temperature in the gas extractor may be specified while the change in the gas extraction ratio of the film 2 due to the change in temperature may be easily minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a gas-in-oil extraction device for automatic monitoring or diagnosis of transformers.

(Prior Art) One of the methods for extracting gas in oil is a method in which insulating oil containing gas is brought into contact with an organic matter permeable membrane, and only the gas in oil is extracted through the permeable membrane. The permeable membrane may be sheet-shaped or pipe-shaped. In the case of a pipe-shaped permeable membrane, the outside of the pipe comes into contact with the insulating oil, and gas permeates inside and is extracted.

To bring the permeable membrane into contact with insulating oil, in the case of a pipe, attach a flange to a single or bundled membrane and attach it to an appropriate position on the transformer, or attach it to a pot that leads insulating oil from the transformer. I can think of something.

In the case of a sheet-shaped permeable membrane, it is conceivable to attach the permeable membrane to the flange to the side wall of the transformer, or to a pot containing insulating oil. Furthermore, the method of directly attaching to a transformer cannot be applied to a transformer that is already in operation, and a new pot containing insulating oil must be manufactured and installed there. When introducing insulating oil to the pot, it is conceivable to use a drain valve for piping.

In the case of a newly installed transformer, either method can be used.

(Problem to be solved by the invention) However, when installing it on a transformer, it is necessary to design a transformer with a permeable membrane mounting hole, and when installing it on a pot, it is necessary to design a pot with piping and permeable membrane mounting holes. It's quite complicated. Therefore, it has been desired to more easily attach a permeable membrane for extracting gas in oil to a transformer system.

The present invention has been made to achieve the above-mentioned needs, and its purpose is to provide a gas-in-oil extraction device containing a permeable membrane that is relatively easy to carry and can be easily installed within a transformer system. be.

[Structure of the Invention (Means and Effects for Solving the Problems) In order to achieve the above object, the gas-in-oil extraction device of the present invention has insulating oil inlets and outlets at a plurality of locations, and has a single pipe or a plurality of pipes. The present invention is characterized in that it is comprised of a container that houses a gas-permeable membrane and has two sampling ports from which the permeated gas in oil can be taken out.

According to the gas-in-oil extraction device of the present invention, the distance between the gas-permeable membrane and the transformer can be freely selected, the permeable membrane can be easily arranged within the area of the transformer, and gas-in-oil can be extracted.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of an embodiment of the present invention.
is a container in which a single or plural pipe-shaped gas permeable membranes 2 are housed. Insulating oil 3 enters from nozzle 5 and passes through nozzle 4.
Since the liquid is configured to exit from the container l, it stays in the container l for a short time. Note that the insulating oil 3 may be configured to enter through the nozzle 4 and exit through the nozzle 5. 6 and 7 are valves that stop the movement of the insulating oil as necessary, and 9 and 10 are valves that seal the gas accumulated in the permeable membrane 2. 8 is a nozzle that guides the gas to the analyzer.

FIG. 2 is a circuit diagram showing connections when introducing insulating oil to the gas-in-oil extractor shown in FIG. 1.

As shown in the figure, one end of the insulating hose Ila is inserted into the nozzle 5 to a desired length, and the other end is inserted into the nozzle 12a of the oil pump 13. Furthermore, one end of an insulating hose Ilb of arbitrary length is inserted into the other nozzle +2b of the pump 13, and the other end is inserted into the flanged nozzle 16. This flange 15a is the transformer insulating oil drain valve 1.
4. Connect to the flange 15b of No.4. An insulating hose (not shown) is inserted into the other nozzle 4 of the extraction device and connected to an outlet of another valve of the transformer (not shown) with an appropriate length.

Next, the operation of the above embodiment will be explained.

In FIGS. 1 and 2, drain valve I4 and valve 6.7 are opened and pump 13 is operated.

The insulating oil of the transformer passes through the container 1 from the insulating hoses Ilb and Ila and returns to the transformer. By continuing to circulate this insulating oil, the time during which the permeable membrane 2 and new insulating oil are in contact becomes longer, and the gas in the oil accumulates in the permeable membrane 2. After a certain period of time has elapsed, the valve 9 is opened, and the gas inside the permeable membrane 2 is drawn out and its components are analyzed using a sensor or gas chromatography.

[Effects of the Invention] As explained above, according to the present invention, the permeable membrane and the insulating oil pot are integrated, so that the transformation can be carried out using piping or hoses for circulating oil between the transformer body and the insulating oil pot. All you have to do is connect it to the main body. In addition, the gas extraction part can be separated from the transformer body, and the temperature of the extraction part no longer depends on the temperature of the transformer. It is possible to reduce the change in gas extraction rate with a simple temperature control device.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram for explaining how the extraction device of FIG. 1 is connected to oil-immersed equipment. 1... Container 2... Pipe-shaped permeable membrane 3.
...Insulating oil 4, 5. 8. 12a, 12b --- nozzle 6, 7. 9.10...Valve 11a, Ilb...Connectivity hose 13...Oil pump 14...Drain valve 15a, 15
b...Flange 16...Flanged nozzle (8733) Agent: Patent attorney Yoshiaki Inomata (and others)
1 person)

Claims (1)

[Claims] (1) Constructed of a container that has multiple insulating oil inlets and outlets, houses a single or multiple pipe-shaped gas permeable membrane, and has two sampling ports from which the permeated gas in the oil can be taken out. A gas-in-oil extraction device featuring: