Bubble dissolution test device for transformer insulating oil and use method of bubble dissolution test device

Abstract

The invention discloses a bubble dissolution test device for transformer insulating oil and a use method, and relates to the technical field of transformer state analysis, the device comprises a rectangular box body, a plurality of first ball valves, a gas collection mechanism, a gas injection mechanism, a bubble filtering mechanism and a gas vacuum pump; the first ball valves are arranged on the side face of the rectangular box body at equal intervals and used for collecting insulating oil samples in the rectangular box body. One end of the gas injection mechanism is in threaded connection with the gas vacuum pump; the gas injection mechanism is arranged in the center of the bottom of the rectangular box body and is used for injecting preset characteristic gas into the rectangular box body; the bubble filtering mechanism is arranged in the rectangular box body and is used for filtering bubbles in the rectangular box body to obtain target bubbles; the gas collecting mechanism is fixedly installed in the center of the top of the rectangular box and used for collecting characteristic gas. The technical problem that the operation reliability of a transformer is reduced due to the fact that the dissolution process of gas generated in oil is not considered in the existing research of gas diffusion in oil is solved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer state analysis, and in particular to a novel roof structure of a prefabricated cabin transformer substation. Background Art

[0002] When an oil-immersed transformer is in operation, when an overheating or discharge fault occurs inside it, the transformer insulating oil around the fault point will be thermally cracked due to overheating or arcing, producing low molecular hydrocarbons: methane, ethane, ethylene, acetylene, as well as seven gases such as hydrogen, carbon monoxide, and carbon dioxide, referred to as characteristic gases. The content, composition, and gas production rate of the dissolved gas in the oil depend on the severity of the fault and the release form of energy at the fault point. Therefore, the results of gas chromatography analysis can be used to determine whether the transformer has internal faults, diagnose its fault type, and infer the severity and development trend of the fault. However, with the introduction of digital design and operation and maintenance requirements for power equipment, higher requirements are placed on the ability to deduce the occurrence and development process of faults. For "black box" equipment such as transformers, the use of digital computing methods to achieve "virtual sensing" inside the transformer is of great engineering significance, so higher requirements are placed on the accuracy of digital computing.

[0003] At present, in the digital calculation research on gas diffusion in oil, most of them only consider the diffusion of dissolved gas, but ignore the dissolution process of gas after it is generated in oil. The relevant parameters of the physical model involved in the dissolution of different components of gas in transformer oil lack corresponding experimental data support, resulting in low accuracy of digital calculation and reduced reliability of transformer operation. Summary of the invention

[0004] The present invention provides a bubble dissolution test device for transformer insulating oil, which solves the technical problems that in the existing digital calculation research on gas diffusion in oil, most of the diffusion of dissolved gas is only considered, while the dissolution process of gas after it is generated in oil is ignored, and the physical model related parameters involved in the dissolution of different component gases in transformer oil lack corresponding test data support, resulting in low accuracy of digital calculation and reduced reliability of transformer operation.

[0005] A first aspect of the present invention provides a bubble dissolution test device for transformer insulating oil, comprising a rectangular box, a plurality of first ball valves, a gas collection mechanism, a gas injection mechanism, a bubble filtering mechanism and a gas vacuum pump;

[0006] The first ball valves are arranged at equal intervals on the side of the rectangular box body, and are used to collect insulating oil samples in the rectangular box body;

[0007] One end of the gas injection mechanism is threadedly connected to the gas vacuum pump;

[0008] The gas injection mechanism is arranged at the bottom center of the rectangular box, and is used to inject a preset characteristic gas into the rectangular box;

[0009] The bubble filtering mechanism is disposed in the rectangular box and is used to filter the bubbles in the rectangular box to obtain target bubbles;

[0010] The gas collection mechanism is fixedly installed at the top center of the rectangular box and is used to collect the characteristic gas.

[0011] Optionally, the rectangular box includes a shell, a top cover plate and a bottom cover plate;

[0012] The top cover is fixedly mounted on the top of the shell, and the top cover is provided with a gas collecting groove;

[0013] A baffle is provided at the bottom of the top cover plate, and the baffle is used to gather the target bubbles;

[0014] The open end of the gas collection groove is arranged downward, and the horizontal cross section of the gas collection groove gradually decreases from bottom to top;

[0015] The bottom cover is fixedly mounted on the bottom of the housing;

[0016] A sealing ring is provided between the top cover plate, the bottom cover plate and the shell.

[0017] Optionally, the gas collection mechanism includes an oil pillow, an air bag, a second ball valve and a third ball valve;

[0018] The first end of the second ball valve is threadedly connected to the top cover plate and communicated with the gas collection tank;

[0019] The second end of the second ball valve is connected to the oil pillow through the third ball valve;

[0020] The third end of the second ball valve is connected to the gas vacuum pump and the air bag respectively through an exhaust pipeline.

[0021] Optionally, the gas injection mechanism includes a fourth ball valve and a syringe pump;

[0022] One end of the fourth ball valve is threadedly connected to the middle portion of the bottom cover plate, and the other end of the fourth ball valve is connected to the injection pump through an output device pipeline.

[0023] Optionally, the shell is made of acrylic material.

[0024] Optionally, the first ball valve is a three-way ball valve.

[0025] Optionally, it also includes an oil valve;

[0026] The oil valve is threadedly connected to the bottom cover plate.

[0027] Optionally, an observation mechanism and a processing mechanism are also included;

[0028] The processing mechanism is electrically connected to the observation mechanism, and the observation mechanism is used to obtain the size parameters of the target bubble in real time.

[0029] Optionally, a plurality of tripods are also included;

[0030] Each of the tripods is fixedly installed on the bottom of the rectangular box.

[0031] A second aspect of the present invention provides a method for using the bubble dissolution test device for transformer insulating oil, comprising:

[0032] The through hole size of the bubble filter mechanism is adjusted according to the preset observed size value to obtain the target filter mechanism;

[0033] The preset characteristic gas is injected into the rectangular box through the gas injection mechanism to obtain bubbles;

[0034] The target filtering mechanism is used to filter the bubbles to obtain target bubbles and obtain insulating oil samples in the rectangular box through each first ball valve according to a preset sampling time;

[0035] Acquiring the size change parameter of the target bubble through an observation mechanism;

[0036] According to the dimensional change parameter and the insulating oil sample, corresponding bubble dissolution test parameters are obtained.

[0037] It can be seen from the above technical solutions that the present invention has the following advantages:

[0038] The through-hole size of the bubble filter mechanism is adjusted by a preset observed size value to obtain a target filter mechanism, and a preset characteristic gas is injected into the interior of a rectangular box through a gas injection mechanism to obtain bubbles. After filtering by the target filter mechanism, an insulating oil sample and a size change parameter are obtained, and then the corresponding bubble dissolution test parameters are obtained according to the size change parameter and the insulating oil sample. This overcomes the technical problem that the existing digital calculation research on gas diffusion in oil does not consider the dissolution process of gas after it is generated in oil, and the physical model-related parameters involved in the dissolution of different component gases in transformer oil lack corresponding experimental data support, which reduces the reliability of transformer operation. Compared with the traditional transformer oil dissolution test device, the present invention performs a filtering operation on the bubble size inside the injection device through a target filtering mechanism, so that technicians can obtain accurate size change parameters, provide accurate experimental data support for the physical model involved in transformer oil dissolution, and improve the reliability of transformer operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 A schematic diagram of the overall structure of a bubble dissolution test device for transformer insulating oil provided in the first embodiment of the present invention;

[0041] Figure 2 A top view of a bubble dissolution test device for transformer insulating oil provided in Embodiment 1 of the present invention;

[0042] Figure 3 A bottom view of a bubble dissolution test device for transformer insulating oil provided in Embodiment 1 of the present invention;

[0043] Figure 4 A schematic diagram showing the variation of the average concentration of dissolved gas over time provided in Example 1 of the present invention;

[0044] Figure 5 A flowchart of the steps of using a bubble dissolution test device for transformer insulating oil provided in the second embodiment of the present invention;

[0045] The meanings of the reference numerals are as follows:

[0046] 1. First ball valve; 2. Oil pillow; 3. Sealing ring; 4. Third ball valve; 5. Top cover plate; 6. Shell; 7. Observation mechanism; 8. Oil valve; 9. Bubble filter mechanism; 10. Baffle; 11. Second ball valve; 12. Fourth ball valve; 13. Tripod. DETAILED DESCRIPTION

[0047] The embodiment of the present invention provides a bubble dissolution test device for transformer insulating oil, which is used to solve the technical problem that most of the existing digital calculation studies on gas diffusion in oil only consider the diffusion of dissolved gas, while ignoring the dissolution process of gas after it is generated in oil, and the physical model related parameters involved in the dissolution of different component gases in transformer oil lack corresponding experimental data support, resulting in low accuracy of digital calculation and reduced reliability of transformer operation.

[0048] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] For easier understanding, see Figures 1 to 4 The present invention provides a bubble dissolution test device for transformer insulating oil, comprising a rectangular box, a plurality of first ball valves 1, a gas collection mechanism, a gas injection mechanism, a bubble filtering mechanism 9 and a gas vacuum pump;

[0050] Each first ball valve 1 is arranged at equal intervals on the side of the rectangular box body, and is used to collect insulating oil samples in the rectangular box body;

[0051] One end of the gas injection mechanism is threadedly connected to the gas vacuum pump;

[0052] The gas injection mechanism is arranged at the bottom center of the rectangular box, and is used to inject the preset characteristic gas into the rectangular box;

[0053] The bubble filtering mechanism 9 is arranged in the rectangular box, and is used to filter the bubbles in the rectangular box to obtain the target bubbles;

[0054] The gas collection mechanism is fixedly installed at the top center of the rectangular box to collect characteristic gases.

[0055] In an embodiment of the present invention, a bubble dissolution test device for transformer insulating oil includes a rectangular box, a plurality of first ball valves 1, a gas collection mechanism, a gas injection mechanism, a bubble filtering mechanism 9 and a gas vacuum pump. Four first ball valves 1 are arranged at equal intervals on the side of the rectangular box, and a 100ml glass syringe is connected to the outside of the first ball valve 1 for extracting insulating oil samples in the rectangular box. One end of the gas injection mechanism is threadedly connected to the gas vacuum pump, and the preset insulating oil sample is passed into the rectangular box through the gas vacuum pump and the oil valve 8 at the bottom of the rectangular box. The gas injection mechanism is arranged at the bottom center of the rectangular box, and is used to inject the preset characteristic gas into the rectangular box when receiving a bubble dissolution test instruction. The bubble filtering mechanism 9 is arranged in the rectangular box and is located below each first ball valve 1, and is used to filter the bubbles in the rectangular box to obtain target bubbles. The gas collection mechanism is fixedly installed at the center of the top of the rectangular box, and is used to collect the characteristic gas in the device.

[0056] See also Figures 1 to 3 As shown, the rectangular box includes a shell 6, a top cover plate 5 and a bottom cover plate;

[0057] The top cover plate 5 is fixedly mounted on the top of the shell 6, and the top cover plate 5 is provided with a gas collecting groove;

[0058] A baffle 10 is provided at the bottom of the top cover plate 5, and the baffle 10 is used to gather target bubbles;

[0059] The opening end of the gas collecting tank is arranged downward, and the horizontal cross section of the gas collecting tank gradually decreases from bottom to top;

[0060] The bottom cover is fixedly mounted on the bottom of the housing 6;

[0061] A sealing ring 3 is provided between the top cover plate 5 , the bottom cover plate and the housing 6 .

[0062] In an embodiment of the present invention, the rectangular box includes a shell 6, a top cover plate 5 and a bottom cover plate. The top cover plate 5 is fixedly installed on the top of the shell 6 by screws or glue, and a gas collection groove is provided at the central position of the bottom of the top cover plate 5. The gas collection groove is arranged under the groove of the opening end, and the horizontal cross section of the gas collection groove gradually decreases from bottom to top. When the gas enters the gas collection groove, it can effectively prevent the gas from dispersing, making it easier to collect the gas in a concentrated manner, and the opening end is downward and the horizontal cross section gradually decreases, so that the center of gravity of the collection groove is relatively low, and the gas can be guided to flow upward, thereby improving the stability of the gas collection groove. A baffle 10 is provided at the bottom of the top cover plate 5 for gathering target bubbles. The bottom cover plate is fixedly installed at the bottom of the shell 6 by screws or glue, and a sealing ring 3 is provided between the top cover plate 5 and the shell 6, and a sealing ring 3 is sandwiched between the bottom cover plate and the shell 6 to ensure the airtightness between the cover plate and the shell 6.

[0063] It is worth mentioning that the baffle 10 is a frosted glass baffle 10, and the fine grooves of the frosted glass are conducive to the gathering of bubbles, so that the position of the bubbles is relatively stable, which is convenient for using the observation mechanism 7 to observe the size of the bubbles.

[0064] It is worth mentioning that the gas collection tank can be a funnel-shaped structure.

[0065] See also Figure 1 to Figure 2 As shown, the gas collection mechanism includes an oil pillow 2, an air bag, a second ball valve 11 and a third ball valve 4; the first end of the second ball valve 11 is threadedly connected to the top cover plate 5 and is connected to the gas collection tank; the second end of the second ball valve 11 is connected to the oil pillow 2 through the third ball valve 4; the third end of the second ball valve 11 is connected to the gas vacuum pump and the air bag respectively through the exhaust pipeline.

[0066] In the embodiment of the present invention, the gas collection mechanism includes an oil pillow 2, an air bag, a second ball valve 11 and a third ball valve 4. The upper port and the lower port of the second ball valve 11 are respectively threadedly connected to one end of the third ball valve 4 and the top cover plate 5, and the side port of the second ball valve 11 is respectively connected to the gas vacuum pump and the air bag through the exhaust pipeline. The other end of the third ball valve 4 is connected to the oil pillow 2. When the insulating oil sample in the device is collected through the first ball valve 1, the oil can be replenished inside the device through the oil pillow 2, without the need to replenish oil from the bottom of the device, thereby avoiding the occurrence of disturbing the gas distribution in the oil when replenishing oil from the bottom of the device.

[0067] It is worth mentioning that the second ball valve 11 is a three-way ball valve and the third ball valve 4 is a two-way ball valve.

[0068] See also Figure 1 and Figure 3 As shown, the gas injection mechanism includes a fourth ball valve 12 and an injection pump; one end of the fourth ball valve 12 is threadedly connected to the middle of the bottom cover plate, and the other end of the fourth ball valve 12 is connected to the injection pump through an output pipe.

[0069] In the embodiment of the present invention, the gas injection mechanism includes a fourth ball valve 12 and an injection pump. The center of the bottom cover plate is threadedly connected to one end of the fourth ball valve 12, and the other end of the fourth ball valve 12 is connected to the injection pump through an output pipe for gas injection.

[0070] It is worth mentioning that the injection pump can deliver gas at a very precise flow rate. It can inject gas into the device according to preset volume or flow parameters through the internal mechanical structure (such as piston movement, etc.). At the same time, the flow resistance of the gas can be adjusted by adjusting the opening and closing degree of the fourth ball valve 12, thereby further fine-tuning the gas flow rate. When the injection pump outputs gas at a basic flow rate, by slightly adjusting the opening of the ball valve, the final amount of gas injected can be more finely corrected.

[0071] It should be noted that the shell 6 is made of acrylic material.

[0072] In the embodiment of the present invention, the shell 6 is made of acrylic material with extremely high transparency, which is convenient for observing the process of bubble dissolution inside the device. It also has a certain toughness and is not easy to be brittle.

[0073] It should be noted that the first ball valve 1 is a three-way ball valve.

[0074] In the embodiment of the present invention, the first ball valve 1 is a three-way ball valve capable of switching three different flow directions. Compared with an ordinary two-way ball valve, it can guide fluid from one inlet to any one of two different outlets, or guide fluids from two different inlets to the same outlet on one valve.

[0075] See also Figure 1 and Figure 3 As shown, an oil valve 8 is also included; the oil valve 8 is threadedly connected to the bottom cover plate.

[0076] In the embodiment of the present invention, an oil valve 8 with a threaded through hole is provided on the bottom cover plate for discharging and introducing insulating oil in the box.

[0077] See also Figure 1 As shown, it also includes an observation mechanism 7 and a processing mechanism;

[0078] The processing mechanism is electrically connected to the observation mechanism 7, and the observation mechanism 7 is used to obtain the size parameters of the target bubble in real time.

[0079] In the embodiment of the present invention, the device further comprises an observation mechanism 7 and a processing mechanism. The processing mechanism is electrically connected to the observation mechanism 7. The observation mechanism 7 is used to obtain the size of the target bubble in real time.

[0080] In another embodiment, the observation mechanism 7 may be a microscope.

[0081] See also Figure 1 and Figure 3 As shown, a plurality of tripods 13 are also included; each tripod 13 is fixedly installed at the bottom of the rectangular box.

[0082] In the embodiment of the present invention, stands 13 are fixedly installed at the four corners of the bottom of the rectangular box to support the device and to elevate the device for easy gas injection.

[0083] In another embodiment, the device further comprises a plurality of legs 13, each of which is adhesively connected to the bottom of the rectangular box.

[0084] It is worth mentioning that during the oil filling stage of the bubble dissolution test device for transformer insulating oil: after the device has been dried and degassed for 24 hours and cooled in vacuum for 4 hours, the oil valve 8 at the bottom of the device is connected to the pipeline, and the other end of the pipeline is placed in a preset insulating oil sample. The first ball valve 1 on the side of the device is closed, and the second ball valve 11 in the gas collection mechanism is adjusted. The first port and the third port of the second ball valve 11 are connected, and the air vacuum pump is turned on. The insulating oil sample is drawn into the device through the pressure difference between the inside and outside of the device. When the liquid level in the rectangular box reaches the specified position, the bottom oil filling valve is closed to complete the box oil filling operation.

[0085] It is worth mentioning that the specific operation of removing bubbles from the insulating oil sample in the device is as follows: adjust the second ball valve 11 in the gas collection mechanism, connect the first port and the third port of the second ball valve 11, turn on the air vacuum pump, observe the pressure display, and when the pressure reaches the specified position, adjust the second ball valve 11 to connect with the air bag. The tiny bubbles in the oil and the air on the top of the oil surface are discharged by vacuuming to prevent interference with the test results.

[0086] It is worth mentioning that the specific steps for obtaining the dissolution rate of a single bubble through the device are as follows: close the first port of the second ball valve 11 of the device, use a glass sampler to take out a certain volume of high-purity single characteristic gas from the gas cylinder, and load the characteristic gas into the syringe. Install the syringe on the micro-injection pump, connect it to the fourth ball valve 12 through the gas pipeline, open both ends of the fourth ball valve 12, set the flow rate and flow rate of the micro-injection pump, and adjust the injection rate of the injection pump to make the bubble size meet the test requirements. After the bubble is injected, it passes through the bubble filtering mechanism 9, and bubbles of a specific size float up and gather at the top frosted glass baffle 10. Use a microscope to continuously observe the bubble size until the bubble dissolves.

[0087] From the law of conservation of mass we know that:

[0088]

[0089]

[0090] in, For time, is the density of the mixed gas in the bubble, is the gas mass, R is the radius of the bubble, j is the gas diffusion flux of the gas-liquid sister, M is the gas molar mass, C is the gas concentration, r is the radial distance, and D is the gas mass diffusion coefficient.

[0091] It should be noted that the bubble filtering mechanism 9 may be a sieve, and the size of the bubbles may be adjusted by adjusting the mesh size of the sieve.

[0092] It is worth mentioning that the average gas dissolution rate is obtained by the device as follows: after injecting characteristic gas into the device through the step of obtaining the single bubble dissolution rate, oil samples are extracted from the four first ball valve 1 oil extraction ports on the side of the box at fixed intervals, and the dissolved gas concentration in each oil sample is obtained by gas chromatograph analysis, and the gas concentration information in the four oil layers at different heights of the device at each sampling moment is obtained, thereby obtaining the average gas concentration in the oil tank at each moment.

[0093] It should be noted that the average gas concentration expression is:

[0094]

[0095] in, is the average gas concentration, is the gas concentration of the first oil layer, is the gas concentration of the second oil layer, is the gas concentration of the third oil layer, is the gas concentration of the fourth oil layer.

[0096] The gas concentration does not increase after 200 minutes, so it can be considered that dissolution mainly occurs in the first 200 minutes. The concentration change rate can be fitted based on the change in the average concentration of dissolved gas over time. Figure 4 As shown, the concentration change rate is 0.801μL / L / min. According to m=ρ*V, V=C*V oil , where V is the gas volume, V oil The volume of oil in the tank can be used to obtain the average dissolution rate of gas in the tank.

[0097] It should be noted that the oil sample extraction operation is specifically as follows: the syringe and the rectangular box are connected through the first ball valve 1 to flush the syringe, and then the first ball valve 1 is adjusted to connect the syringe with the side valve port to empty the oil sample in the syringe, and then the syringe is connected with the rectangular box to take out 40 ml of oil sample.

[0098] In an embodiment of the present invention, the through-hole size of the bubble filter mechanism 9 is adjusted by a preset observed size value to obtain a target filter mechanism, and a preset characteristic gas is injected into the interior of a rectangular box through a gas injection mechanism to obtain bubbles. After filtering operation by the target filter mechanism, an insulating oil sample and a size change parameter are obtained, and then corresponding bubble dissolution test parameters are obtained according to the size change parameter and the insulating oil sample. This overcomes the technical problem that the dissolution process of gas after it is generated in oil is not considered in the existing digital calculation research on gas diffusion in oil, and the physical model related parameters involved in the dissolution of different component gases in transformer oil lack corresponding experimental data support, which reduces the reliability of transformer operation. Compared with the traditional transformer oil dissolution test device, the present invention performs a filtering operation on the bubble size inside the injection device through a target filtering mechanism, so that technicians can obtain accurate size change parameters, provide accurate experimental data support for the physical model involved in transformer oil dissolution, and improve the reliability of transformer operation.

[0099] See also Figure 5 , Figure 5 A flow chart of the steps of a bubble dissolution test device method for transformer insulating oil provided in Embodiment 2 of the present invention.

[0100] The present invention provides a method for using a bubble dissolution test device for transformer insulating oil, comprising:

[0101] Step 101, adjusting the through hole size of the bubble filter mechanism according to a preset observed size value to obtain a target filter mechanism;

[0102] Step 102, injecting a preset characteristic gas into the interior of the rectangular box through a gas injection mechanism to obtain bubbles;

[0103] Step 103, using a target filtering mechanism to filter the bubbles, obtain target bubbles and obtain insulating oil samples in the rectangular box through each first ball valve according to a preset sampling time;

[0104] Step 104, obtaining the size change parameters of the target bubble through an observation mechanism;

[0105] Step 105: Obtain corresponding bubble dissolution test parameters according to the size change parameters and the insulating oil sample.

[0106] In an embodiment of the present invention, the through-hole size of the bubble filtering mechanism is adjusted by a preset observed size value to obtain a target filtering mechanism, and a preset characteristic gas is injected into the interior of a rectangular box through a gas injection mechanism to obtain bubbles. After filtering operation by the target filtering mechanism, an insulating oil sample and a size change parameter are obtained, and then corresponding bubble dissolution test parameters are obtained based on the size change parameter and the insulating oil sample. This overcomes the technical problem that the dissolution process of gas after it is generated in oil is not considered in the existing digital calculation research on gas diffusion in oil, and the physical model related parameters involved in the dissolution of different component gases in transformer oil lack corresponding experimental data support, which reduces the reliability of transformer operation. Compared with the traditional transformer oil dissolution test device, the present invention performs a filtering operation on the bubble size inside the injection device through a target filtering mechanism, so that technicians can obtain accurate size change parameters, provide accurate experimental data support for the physical model involved in transformer oil dissolution, and improve the reliability of transformer operation.

[0107] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0108] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0109] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bubble dissolution test device for transformer insulating oil, characterized in that: It includes a rectangular box, a plurality of first ball valves, a gas collection mechanism, a gas injection mechanism, a bubble filtering mechanism and a gas vacuum pump; The first ball valves are arranged at equal intervals on the side of the rectangular box body, and are used to collect insulating oil samples in the rectangular box body; One end of the gas injection mechanism is threadedly connected to the gas vacuum pump; The gas injection mechanism is arranged at the bottom center of the rectangular box, and is used to inject a preset characteristic gas into the rectangular box; The bubble filtering mechanism is disposed in the rectangular box and is used to filter the bubbles in the rectangular box to obtain target bubbles; The gas collection mechanism is fixedly installed at the top center of the rectangular box and is used to collect the characteristic gas.

2. The bubble dissolution test device for transformer insulating oil according to claim 1, characterized in that: The rectangular box includes a shell, a top cover plate and a bottom cover plate; The top cover is fixedly mounted on the top of the shell, and the top cover is provided with a gas collecting groove; A baffle is provided at the bottom of the top cover plate, and the baffle is used to gather the target bubbles; The open end of the gas collection groove is arranged downward, and the horizontal cross section of the gas collection groove gradually decreases from bottom to top; The bottom cover is fixedly mounted on the bottom of the housing; A sealing ring is provided between the top cover plate, the bottom cover plate and the shell.

3. The bubble dissolution test device for transformer insulating oil according to claim 2, characterized in that: The gas collection mechanism includes an oil pillow, an air bag, a second ball valve and a third ball valve; The first end of the second ball valve is threadedly connected to the top cover plate and communicated with the gas collection tank; The second end of the second ball valve is connected to the oil pillow through the third ball valve; The third end of the second ball valve is connected to the gas vacuum pump and the air bag respectively through an exhaust pipeline.

4. The bubble dissolution test device for transformer insulating oil according to claim 2, characterized in that: The gas injection mechanism includes a fourth ball valve and a syringe pump; One end of the fourth ball valve is threadedly connected to the middle portion of the bottom cover plate, and the other end of the fourth ball valve is connected to the injection pump through an output device pipeline.

5. The bubble dissolution test device for transformer insulating oil according to claim 2, characterized in that: The shell is made of acrylic material.

6. The bubble dissolution test device for transformer insulating oil according to claim 1, characterized in that: The first ball valve is a three-way ball valve.

7. The bubble dissolution test device for transformer insulating oil according to claim 2, characterized in that: Also includes an oil-passing valve; The oil valve is threadedly connected to the bottom cover plate.

8. The bubble dissolution test device for transformer insulating oil according to claim 1, characterized in that: It also includes observation agencies and processing agencies; The processing mechanism is electrically connected to the observation mechanism, and the observation mechanism is used to obtain the size parameters of the target bubble in real time.

9. The bubble dissolution test device for transformer insulating oil according to claim 1, characterized in that: Also included are multiple tripods; Each of the tripods is fixedly installed on the bottom of the rectangular box.

10. A method for using the bubble dissolution test device for transformer insulating oil according to any one of claims 1 to 9, characterized in that: include: The through hole size of the bubble filter mechanism is adjusted according to the preset observed size value to obtain the target filter mechanism; The preset characteristic gas is injected into the rectangular box through the gas injection mechanism to obtain bubbles; The target filtering mechanism is used to filter the bubbles to obtain target bubbles and obtain insulating oil samples in the rectangular box through each first ball valve according to a preset sampling time; Acquiring the size change parameter of the target bubble through an observation mechanism; According to the dimensional change parameter and the insulating oil sample, corresponding bubble dissolution test parameters are obtained.

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