JP2008180524A - Oil-in-gas analyzer for oil-filled equipment - Google Patents

Abstract

A membrane permeation type gas analyzer in oil has a problem that it takes time to collect gas as compared with other methods such as a bubbling method.
A gas reservoir chamber formed by a gas permeable membrane and a grooved flange has an elongated shape with a predetermined volume. At the time of gas collection, the gas is diffused to the gas reservoir chamber side through the gas permeable membrane. At the time of gas measurement, the carrier gas is supplied from the end of the gas reservoir chamber, the gas reservoir chamber is replaced with the carrier gas, and a predetermined amount of sample gas is sent out from the other end and supplied to the gas measuring device. The calibration tube can be omitted by calibrating the sample gas in the gas reservoir. In addition, by forming the shape of an elongated groove, the shear stress applied to the gas permeable membrane can be reduced, and the thickness of the gas permeable membrane can be reduced. Thereby, the time required for gas collection can be shortened.
[Selection] Figure 1

Description

  The present invention relates to an in-oil gas analyzer for analyzing a gas dissolved in oil of a device containing oil such as an oil-filled transformer, and in particular, a dissolved gas in oil using a gas permeable membrane. The present invention relates to an in-oil gas analyzer for oil-filled equipment that performs gas analysis by extracting gas.

  If the insulating oil deteriorates due to electric discharge, overheating, or aging in the oil-filled transformer, the insulating oil is decomposed to generate gases such as hydrogen, carbon monoxide, carbon dioxide, methane, ethane, ethylene, and acetylene (hereinafter referred to as decomposition products). (Referred to as gas). The generation amount of decomposition product gas and the generation pattern of decomposition product gas differ depending on the type of abnormality in the transformer. Therefore, by measuring the decomposition gas concentration in the insulating oil (hereinafter referred to as oil gas analysis), investigating the generation amount and generation pattern of the decomposition gas, and referring to past cases, It is possible to determine the degree.

  In oil-in-gas analysis, insulating oil is collected from a transformer, and decomposition product gas is collected from the collected insulating oil and used for gas analysis. As a method of collecting the cracked product gas, a bubbling method in which gas is foamed in the collected insulating oil and the cracked product gas is extracted to the gas in an equilibrium manner, or a gas permeation that does not permeate the insulating oil but permeates the cracked product gas. There is a membrane permeation system in which decomposition product gas is collected in a container through which a gas permeates (hereinafter referred to as a gas reservoir chamber).

  Among these, with respect to the membrane permeation method, a gas reservoir chamber is provided so as to be in contact with the gas permeable membrane, and an air supply port and an air discharge port are provided in the gas reservoir chamber, and are stored in the gas reservoir chamber by supplying air. There is known one in which a gas is sent to the outside and analyzed by a gas analyzer (for example, see Patent Document 1).

JP-A-56-162049

  In the gas analysis by the membrane permeation method, the sample gas is used for gas analysis when the concentration of the decomposition product gas in the gas reservoir chamber reaches equilibrium. Since the membrane permeation method only waits for the decomposition product gas to diffuse into the gas reservoir chamber, the sample gas sampling operation is easy, but compared with other methods such as the bubbling method, There is a problem that it takes time to collect gas. Patent document 1 aims at detecting the gas component in insulating oil, without extracting insulating oil from an oil-filled apparatus, and does not consider until shortening the time which gas collection requires.

  An object of the present invention is to reduce the time required for gas collection in a membrane permeation type in-oil gas analyzer.

  The present invention provides a gas permeable membrane at an oil drain port of an oil-filled device, and a gas reservoir chamber is provided in contact with the gas permeable membrane so that gas that has permeated the gas permeable membrane is stored. Are provided with a carrier gas supply port and a carrier gas discharge port so that the analysis gas is discharged from the gas reservoir chamber by supplying the carrier gas, and the analysis gas discharged from the gas reservoir chamber is supplied to the gas measuring device. In the oil-in-gas analyzer for an oil-filled device to be supplied and analyzed, the shape of the gas reservoir chamber is a groove shape.

  In the present invention, it is preferable that a groove-like passage connecting the carrier gas supply port and the carrier gas discharge port is a gas reservoir chamber.

  In the present invention, it is preferable that the cross-sectional area of the groove of the gas reservoir chamber having the groove shape is the same as or smaller than the cross-sectional area of the carrier gas supply port.

  In addition, it is desirable to provide an oil flow means that stirs or vibrates the oil in the vicinity of the gas permeable membrane to give the oil a flow.

  In addition, it is desirable that the volume of the gas reservoir chamber be the same as the volume of the sample gas necessary for gas measurement with the gas measuring device. In a gas measuring device including a gas analysis column and a gas detection element, it is necessary to supply a specified amount of sample gas to the gas measuring device. By making the volume of the gas reservoir chamber the same as the volume of the sample gas required for gas measurement with the gas measuring instrument, it is possible to perform calibration in the gas reservoir chamber and to provide a specified amount of sample gas without a separate calibration tube. Can supply.

  In the permeable membrane type gas-in-oil analyzer, since the gas reservoir chamber is formed in a groove shape, the volume of the gas reservoir chamber can be reduced, and the thickness of the gas permeable membrane can be reduced. Thereby, the time until the concentration of the decomposition product gas in the gas reservoir chamber reaches the equilibrium state can be shortened, and the time required for collecting the decomposition product gas can be shortened. According to the present invention, the time interval of the oil-in-gas analyzer can be shortened, and transformer abnormality diagnosis in real time is possible.

  In the membrane permeation type oil-in-gas analyzer, the time t when the concentration of the decomposition product gas in the gas reservoir chamber reaches an equilibrium state is the volume of the gas reservoir chamber V, the thickness of the permeable membrane d, and the area of the permeable membrane. As A, it can represent with the following formula 1. P is a transmission coefficient and C is a constant.

  According to Equation 1, the time t until reaching the equilibrium can be reduced by reducing the thickness d of the gas permeable membrane and the volume V of the gas reservoir chamber and increasing the area A of the gas permeable membrane.

  In order to reduce the time t until reaching the equilibrium, it is desirable to reduce the thickness d of the permeable membrane. However, the gas permeable membrane is often attached to the oil discharge port of the oil-filled transformer, and a pressure of about 0.2 MPa is applied to the attachment position by the insulating oil. For this reason, it will be damaged if the thickness of the gas permeable membrane is made too small.

  When a gas permeable membrane having a thickness d1 is used for a groove-like gas reservoir chamber having an outer radius R1 + r and a hollow inner radius R1-r, the pressure applied to the gas permeable membrane is expressed as p. The shear stress τ1 applied to the periphery of the gas permeable membrane can be expressed by the following equation 2.

  When the pressure p applied to the gas permeable membrane is 0.2 MPa and the allowable shear stress is τ, the relationship between the groove width 2r and the thickness d of the gas permeable membrane is determined by the following equation (3).

  From the above, in the present invention, the groove shape is such that the relationship between the allowable maximum shear stress τ [MPa] of the material of the gas permeable membrane, the groove width 2r, and the thickness d of the gas permeable membrane is expressed by Equation 3. It is preferable to reduce the thickness of the gas permeable membrane by defining the width of the gas reservoir chamber.

  In order to improve the accuracy of gas measurement, it is desirable that the sample gas for analysis stored in the gas reservoir chamber can be supplied to the gas measuring instrument without being diluted with the carrier gas. To this end, the present invention proposes that the cross-sectional area of the groove of the gas reservoir chamber be the same as or smaller than the cross-sectional area of the carrier gas inlet. Thereby, it is possible to prevent the gas in the gas reservoir chamber from being diluted by the carrier gas.

  When the gas measuring device is composed of a gas analysis column and a gas detection element, it is required to supply a specified amount of sample gas to the gas measuring device. By making the volume of the groove, which is the gas reservoir chamber, the same as the volume of the sample gas required for gas measurement with the gas meter, it is possible to perform gas calibration in the gas reservoir chamber and provide a calibration tube. Even if it is not, a specified amount of gas can always be supplied to the gas meter. In this case, it is desirable that the carrier gas supply port and the carrier gas discharge port be provided at the end of the groove-like gas reservoir chamber so that a specified amount of sample gas can be supplied. In Patent Document 1 shown in the prior art, gas calibration is performed with a calibration tube attached to the outside. For this purpose, piping and a switching valve connected to the calibration tube are required. Further, the volume of the gas reservoir chamber is increased due to the volume of these facilities and the calibration tube itself.

  In the gas-in-oil analyzer of the present invention, it is preferable to provide an oil flow means for imparting a flow by stirring or shaking the oil. When the cracked gas contained in the oil permeates to the gas reservoir chamber side, the concentration of the cracked gas contained in the oil is locally reduced in the vicinity of the gas permeable membrane, and the gas permeation efficiency is lowered. The oil is stirred or oscillated to give a flow, so that the concentration of the decomposition product gas in the oil can be made uniform and the gas permeation efficiency can be increased. Thereby, the time t until reaching the equilibrium can be reduced.

  As the material of the gas permeable membrane, a polymer organic compound membrane or a polymer organic compound porous membrane can be used. In addition, a polymer organic compound film or a polymer organic compound porous film integrated with a porous plate, a perforated plate or a wire mesh as a reinforcing material can be used. In addition, as the gas measuring device, various sensor methods, gas chromatography methods, acoustic methods, and the like can be applied. As an application of the present invention, there is an oil-filled apparatus equipped with an in-oil gas analyzer.

  In this embodiment, an oil-in-gas analyzer for an oil-filled transformer will be described. FIG. 1 shows the structure of a gas sampling unit in an in-oil gas analyzer. The gas sampling unit 100 includes a grooved flange 101, a gas permeable membrane 102, a grooved gas reservoir chamber 103, a carrier gas supply port 104, a carrier gas discharge port 105, a valve 106a, and a valve 106b.

  The oil discharge port 201 is provided on the oil-filled transformer side together with the oil discharge valve 202. The oil discharge port 201 and the oil discharge valve 202 are originally used as discharge ports for unnecessary insulating oil, but in the present invention, they are used as attachment portions for the gas sampling unit 100. At the time of gas collection, the oil drain valve 202 is open, and the gas permeable membrane 102 is in close contact with the insulating oil 203.

  The grooved flange 101 is fastened to the oil discharge port 201 to equip the oil-filled transformer 200 with the gas sampling unit 100 and support the gas permeable membrane 102 by sandwiching it from the surroundings.

  The gas permeable membrane 102 seals the insulating oil 203 in the oil-filled transformer or the outer container of the oil-filled transformer, and allows the decomposition product gas to permeate the groove-like gas reservoir chamber 103 side. As the material of the gas permeable membrane 102, a 0.1 mm thick ethylene tetrafluoride / perfluoroalkyl vinyl ether copolymer membrane was used. Suitable materials for the gas permeable membrane 102 include a tetrafluoride copolymer film, an organic polymer compound film such as polyethylene and fluororubber, a porous organic polymer compound film, and a porous plate coated with an organic polymer compound. And a combination of an organic polymer compound film and a reinforcing material such as a perforated plate or a wire mesh.

  The groove-like gas reservoir chamber 103 is a space formed by the groove-like depression formed in the grooved flange 101 and the gas permeable film 102, and collects and stores a sample gas. The groove-like gas reservoir chamber 103 serves as a carrier gas flow path when the sample gas is supplied.

  The carrier gas supply port 104 communicates with one end of the groove-like gas reservoir chamber 103 and is an inlet through which the carrier gas flows into the groove-like gas reservoir chamber 103.

  The area of the cross section perpendicular to the streamline direction of the carrier gas in the groove-like gas reservoir chamber 103 is made smaller than the area of the cross section perpendicular to the streamline direction of the carrier gas at the carrier gas supply port 104.

  The carrier gas discharge port 105 communicates with the other end of the groove-like gas reservoir chamber 103, and is an outlet for the sample gas collected and stored and the carrier gas flowing in from the carrier gas supply port 104.

  The valves 106a and 106b are closed when sample gas is collected and stored, and are opened when the gas reservoir chamber is replaced with the carrier gas.

  The packing 107 is inserted into the fastening portion between the grooved flange 101 and the gas permeable membrane 102 and the fastening portion between the oil discharge port 201 and the gas permeable membrane 102 to seal the insulating oil in the oil-filled transformer or its outer container. To contribute to.

  FIG. 2 shows the structure of the grooved flange in the oil-in-gas analyzer. Here, the groove-like gas reservoir chamber 103 has a linear groove shape. In order to prevent the flow of the carrier gas from being disturbed when the carrier gas is supplied, or to prevent the sample gas and the carrier gas from being mixed, the cross-sectional area of the cross section perpendicular to the flow direction of the carrier gas in the grooved gas reservoir chamber 103 Is preferably equal to or smaller than the cross-sectional area of the carrier gas supply port.

  FIG. 3 shows the configuration of an in-oil gas analyzer according to the present invention. The carrier gas supply port of the gas sampling unit 100 attached to the oil discharge port of the oil-filled transformer 200 communicates with the carrier gas supply unit 300 via the pipe 501. Further, the carrier gas discharge port of the gas sampling unit 100 communicates with the gas measurement unit 400 via the pipe 502. The pipe 501 and the pipe 502 are connected to the pipe 503, and the carrier gas is directly supplied to the gas measuring unit 400 when the valve 106c is opened. The carrier gas from the carrier gas supply unit 300 is supplied to the gas measurement unit 400 or the gas sampling unit 100.

  The gas measuring unit 400 measures the type and concentration of gas contained in the sample gas. A gas chromatography method is suitable for the measurement by the gas measurement unit 400. A gas measurement unit using a gas chromatography system includes a gas chromatographic column for gas analysis and a gas detection element. The gas chromatographic column is cylindrical, and once the sample gas passes through the gas chromatographic column, the gas is once adsorbed and released. The timing of adsorption and release differs depending on the type of gas, and the sample gas is separated for each gas component. The gas detection element detects the decomposition product gas separated for each component. A semiconductor gas sensor is suitable as the gas detection element, but a solid electrolyte sensor, an electrochemical sensor, or the like may be used.

  Further, as the gas measuring unit 400, several types of sensors having different reaction characteristics depending on the type of gas may be used. In this case, the type and concentration of the gas are obtained from the difference in gas reaction characteristics.

  FIG. 4 is a diagram showing the procedure of gas analysis in oil. The operation of gas analysis in oil includes preparation for sample gas collection, sample gas collection and storage, preparation for measurement, sample gas supply, and sample gas measurement.

  First, as preparation for collecting the sample gas, the groove-like gas reservoir chamber 103 is replaced with a carrier gas. With the valve 106c closed and the valves 106a and 106b opened, the carrier gas is supplied from the carrier gas supply unit 300.

  Next, sample gas is collected and stored. If the inside of the groove-like gas reservoir chamber 103 is replaced with the carrier gas, the valves 106a and 106b are closed. The decomposition product gas dissolved in the insulating oil permeates the gas permeable membrane 102 and diffuses into the groove-like gas reservoir chamber 103. Wait until the gas concentration in the groove-like gas reservoir chamber 103 and the concentration of the decomposition product gas in the insulating oil reach equilibrium.

  The time until the gas concentration reaches equilibrium is known in advance by performing a measurement test. In addition, if the constant C is known in Equation 1, the time to reach equilibrium may be estimated from Equation 1.

  Next, preparation for measurement is performed. Leave valves 106a and 106b closed and open valve 106c.

  A carrier gas is supplied from the carrier gas supply unit 300 to the gas measurement unit 400 to stabilize the state of the gas chromatography column and the output of the gas detection element.

  Subsequently, sample gas is supplied. The valve 106 c is closed, the valves 106 a and 106 b are opened, and the carrier gas is supplied from the carrier gas supply unit 300 to the gas measurement unit 400 via the gas sampling unit 100.

  By replacing the inside of the groove-like gas reservoir chamber 103 with a carrier gas, the sample gas in the groove-like gas reservoir chamber 103 is supplied to the gas measuring device 400, and the gas measuring unit 400 measures the type and concentration of the gas. To do.

  In the present embodiment, a case where sample gas is sampled / stored, calibrated, and supplied in the grooved gas reservoir chamber 103 will be described with reference to FIGS. 2, 3, and 4. By calibrating the sample gas in the grooved gas reservoir chamber 103, it is not necessary to separately provide a calibration tube, and the volume of the piping up to the calibration tube itself and the calibration tube can be saved. As a result, the volume V of the gas reservoir chamber in Formula 1 can be reduced, and the time t until reaching equilibrium can be shortened.

  In FIG. 3, when gas is separated by a gas analysis column or the like as a gas measurement unit 400 and gas is detected by a gas detection element, it is necessary to supply a specified amount of sample gas for gas measurement.

  In FIG. 2, the carrier gas supply port 104 has a cylindrical shape with a radius r. The groove-like gas reservoir chamber 103 has a rectangular parallelepiped shape with a length L, a width 2r, and a groove depth h, and further has a semi-cylindrical shape with both ends having a radius r and a depth h. Therefore, the volume of the groove-like gas reservoir chamber 103 is 2rLh + πr2h.

  The volume of the groove-like gas reservoir chamber 103 is the volume of the supplied sample gas. Therefore, the volume of the groove-like gas reservoir chamber 103 is made equal to the volume of the sample gas necessary for measurement.

  The gas measuring unit 400 required 1000 mm 3 sample gas. Therefore, the groove-like gas reservoir chamber 103 has a length L = 96 mm, a width 2r = 5 mm, and a groove depth h = 2 mm, and a sample gas of about 1000 mm 3 is supplied to the gas measurement unit 400.

  The cross-sectional area 2 rh perpendicular to the carrier gas streamline direction in the groove-like gas reservoir chamber 103 is 10 mm 2, which is smaller than 19.6 mm 2 of the cross-sectional area πr 2 of the carrier gas supply port 104.

  As a procedure for analyzing the gas in oil, according to FIG. 4, first, the groove-like gas reservoir chamber 103 was replaced with a carrier gas as a preparation for gas sampling. The carrier gas was supplied from the carrier gas supply unit 300 with the valve 106c closed and the valves 106a and 106b opened.

  Next, sample gas was collected and stored. When the inside of the groove-like gas reservoir chamber 103 is replaced with the carrier gas, the valve 106a and the valve 106b are closed and held. The decomposition product gas dissolved in the insulating oil permeates the gas permeable membrane 102 and diffuses into the groove-like gas reservoir chamber 103. It waited until the gas concentration in the grooved gas reservoir chamber 103 reached equilibrium.

  The time required for the gas concentration to reach equilibrium was determined in advance by carrying out a measurement test and was set to 70 [h].

  When a calibration tube not provided according to the present invention was separately provided, the time until the gas concentration reached equilibrium was 138 [h].

  Therefore, according to the present invention, the time required for gas collection can be reduced to about one half.

  Subsequently, after the gas concentration reached equilibrium, preparations for measurement were made. Valve 106a and valve 106b were kept closed and valve 106c was opened.

  The carrier gas was supplied from the carrier gas supply unit 300 to the gas measurement unit 400 to stabilize the state of the gas analysis column and the output of the gas detection element.

  Subsequently, sample gas was supplied. The valve 106c was closed and the valves 106a and 106b were opened, and the carrier gas was supplied from the carrier gas supply unit 300 to the gas measurement unit 400 via the gas sampling unit 100.

  By replacing the inside of the groove-like gas reservoir chamber 103 with the carrier gas, the sample gas in the groove-like gas reservoir chamber 103 was supplied to the gas measuring device 400.

  In this embodiment, a case where the thickness of the gas permeable membrane is reduced by adjusting the width of the groove-like gas reservoir chamber 103 will be described. FIG. 5 shows the structure of a grooved flange in which the gas reservoir chamber has an arc shape. As an example of the present invention, the groove-like gas reservoir chamber 103 has a cylindrical shape with an outer diameter R1 + r, an inner diameter R1-r, and a height h, and a case where a gas permeable film 102 with a thickness d1 is used, and an example of the conventional method. A case where the gas reservoir chamber has a columnar shape with a radius R2 and a height h and a gas permeable membrane 102 with a thickness d2 is used will be compared.

  In the case of the present invention, assuming that the shear stress applied to the periphery of the gas permeable membrane 102 is uniform, the shear stress τ1 applied to the periphery of the gas permeable membrane 102 is obtained by Equation 2 as described above.

  When the allowable shear stress is τ, the thickness d1 of the gas permeable membrane 102 is determined by Equation 4.

  On the other hand, in the case of the conventional method, the shear stress τ 2 applied around the gas permeable membrane 102 is determined by Equation 5.

  When the allowable shear stress is τ, the thickness d2 of the gas permeable membrane 102 is determined by Equation 6.

  The film thickness ratio d1 / d2 is as shown in Equation 7, and is determined by r and R2, regardless of R1.

  Further, since V = A · h, Expression 1 can be expressed by Expression 8 below.

  The time t1 to reach equilibrium according to the present invention is as shown in Equation 9.

  Further, the time t2 until reaching the equilibrium according to the conventional method is as shown in Expression 10.

  Therefore, the ratio t1 / t2 of the time to reach equilibrium is as shown in Expression 11 by Expression 7, Expression 9, and Expression 10, and is determined by r and R2.

  When the area of the gas permeable membrane 102 is the same between the present invention and the conventional method, for example, even when R1 is 50 mm, r is 2 mm, and R2 is 20 mm, the time t1 to reach the equilibrium according to the present invention is The time to reach equilibrium by the method can be reduced to one fifth of the time t2.

  FIG. 6 is a view showing the structure of the grooved flange when the groove-shaped gas reservoir chamber has a zigzag shape.

  FIG. 7 is a view showing the structure of the grooved flange when the groove-shaped gas reservoir chamber has a spiral shape.

  Instead of the grooved flange in which the shape of the grooved gas reservoir chamber shown in FIG. 5 is an arcuate shape, a zigzag or spiral grooved flange may be used.

  In this embodiment, a case where oil flowing means is provided and insulating oil in the vicinity of the gas permeable membrane 102 is flowed will be described. By causing the insulating oil to flow, a decrease in the concentration of the decomposition product gas in the vicinity of the gas permeable membrane 102 can be suppressed.

  FIG. 8 is a diagram showing the configuration of the in-oil gas analyzer according to the present invention provided with an oil flow means. In FIG. 8, the gas sampling unit 100 includes a stirrer 601 as oil flow means. The stirrer 601 has propeller blades, and the oil in the vicinity of the gas permeable membrane 102 is caused to flow by rotating. Oil is allowed to flow during sample gas collection and storage operations. Moreover, you may use the ultrasonic oscillator 602 instead of the stirrer 601 as an oil flow means.

The figure which shows the structure of the gas sampling part of the gas analyzer in oil by this invention. The figure which shows the structure of the grooved flange by this invention. The figure which shows the structure of the gas analyzer in oil by this invention. The figure which shows the procedure of the gas analysis in oil. The figure which shows the grooved flange whose shape of the grooved gas reservoir chamber by this invention is circular arc shape. The figure which shows the structure of a grooved flange in case the shape of the groove-shaped gas reservoir chamber by this invention is a zigzag shape. The figure which shows the structure of a grooved flange in case the shape of the groove-shaped gas reservoir chamber by this invention is a spiral shape. The figure which shows the structure of the gas analyzer in oil provided with the oil flow means.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Gas-in-oil analyzer, 100 ... Gas sampling part, 101 ... Flange with flange, 101, 102 ... Gas permeable membrane, 103 ... Groove-shaped gas reservoir chamber, 104 ... Carrier gas supply port, 105 ... Carrier gas discharge port, 106a, 106b, 106c ... valve, 107 ... packing, 200 ... oil-filled transformer, 201 ... oil discharge port, 202 ... oil discharge valve, 203 ... insulating oil, 300 ... carrier gas supply unit, 400 ... gas measurement unit, 501 ... Piping, 502 ... Piping, 503 ... Piping.

Claims (12)

  An apparatus for analyzing a gas dissolved in oil in an oil-filled device, wherein a gas permeable film is provided at an oil drain port of the oil-filled device, a gas reservoir chamber is provided in contact with the gas permeable film, and A carrier gas supply port and a carrier gas discharge port for sending the gas stored in the gas reservoir chamber to the outside are provided in the gas reservoir chamber so that the gas that has permeated the gas permeable membrane is stored. In-oil gas analyzer equipped with a gas measuring device for analyzing the gas sent out by the supply of the gas, the gas reservoir chamber in the shape of a groove, the oil-in-gas analysis of oil-filled equipment apparatus.   2. The in-oil gas analyzer for oil-filled equipment according to claim 1, wherein a groove-like passage connecting the carrier gas supply port and the carrier gas discharge port serves as the gas reservoir chamber.   The in-oil gas analyzer for oil-filled equipment according to claim 1, wherein a cross-sectional area of the groove of the gas reservoir chamber having a groove shape is the same as or smaller than a cross-sectional area of the carrier gas supply port.   2. The in-oil gas analyzer for oil-filled equipment according to claim 1, wherein the volume of the gas reservoir chamber is the same as the volume of the sample gas required for gas measurement by the gas measuring device.   5. The in-oil gas analyzer for oil-filled equipment according to claim 4, wherein the gas measuring device comprises a gas analysis column and a gas detection element.   2. An in-oil gas analyzer for oil-filled equipment according to claim 1, further comprising oil flow means for stirring and shaking oil in the vicinity of the gas permeable membrane to impart flow.   The sample gas sent from the carrier gas discharge port is supplied to the gas measurement device according to claim 1, wherein a pipe that communicates the carrier gas discharge port provided in the gas storage chamber and the gas measurement device is provided. An oil-in-gas analyzer for oil-filled equipment, characterized by being made to do so.   8. The groove of the gas reservoir chamber according to claim 7, wherein the groove shape is any one of a linear shape, an arc shape, a zigzag shape, and a spiral shape, the carrier gas supply port is provided at one end of the groove, and the other end. An oil-in-gas analyzer for oil-filled equipment, characterized in that the carrier gas outlet is provided in the part.   2. The relationship between the allowable maximum shear stress τ [MPa] of the material of the gas permeable membrane, the groove width 2r and the thickness d of the permeable membrane is r ≦ 5τ · d. Gas analyzer for oil in equipment containing oil.   2. The gas permeable membrane according to claim 1, wherein the gas permeable membrane is a polymer organic compound membrane, a polymer organic compound porous membrane, a porous plate, or a perforated plate integrated with a polymer organic compound membrane. An oil-in-gas analyzer for oil-filled equipment.   2. The in-oil gas analyzer for oil-filled equipment according to claim 1, wherein the gas measuring device is a multi-sensor type, gas chromatography type or acoustic type gas measuring device.   An oil-filled device equipped with the in-oil gas analyzer according to claim 1.

Images