A measuring device for the flashover characteristics of materials considering the influence of humidity

Abstract

The present invention relates to the technical field of electrical insulation detection, and particularly relates to a measuring device for the flashover characteristics of materials considering the influence of humidity, which includes a moisture injection system, a sealed detection chamber, a humidity measurement system, a power supply system, a test specimen, and a temperature control module; the moisture injection system includes a micro-water injection chamber, a micro-water diffusion module, and a dry gas chamber; the humidity measurement system includes a moisture sampling chamber and a moisture sensing unit; the sealed detection chamber is provided with a moisture inlet channel, a moisture detection channel, and a gas discharge channel; the power supply system includes two conductive rods, a high-voltage electrode, a low-voltage electrode, and a high-voltage power supply; the test specimen is installed between the high-voltage electrode and the low-voltage electrode; the temperature control module covers the sealed detection chamber, the micro-water injection chamber, and the moisture sampling chamber; the present invention is used to overcome the problem of poor flexibility in gas humidity regulation in the prior art. The present invention can flexibly adjust the gas humidity, improve the detection efficiency, and further improve the accuracy of measuring the flashover characteristics of materials under different humidity conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical insulation detection, and particularly to a measuring device for the flashover characteristics of materials considering the influence of humidity. Background Art

[0002] UHV DC transmission is an important means for long-distance power transmission and grid interconnection in China, and is of great significance to the construction of China's energy pattern. However, in recent years, due to equipment sealing failures and lax assembly processes, solid insulating materials are often affected by moisture. After being affected by moisture, the surface insulation strength of solid insulating materials decreases, posing a significant safety hazard. Therefore, it is very important to study the influence of humidity on the flashover characteristics of materials.

[0003] Traditional detection methods involve filling calibration gases into the test chamber to create different humidity conditions, that is, conducting experiments using pre-configured insulating gases with different humidities from the manufacturer to detect the flashover characteristics of insulators under different humidity conditions. However, traditional methods require replacing calibration gases with corresponding moisture concentrations to change the gas humidity, which is cumbersome, inconvenient to operate, lacks flexibility in regulating gas humidity, and has low detection efficiency. At the same time, under high humidity conditions, moisture is likely to condense on the inner wall of the equipment, not only damaging the equipment but also affecting the measurement accuracy of the flashover characteristics of materials. Summary of the Invention

[0004] To overcome the above-mentioned defects in the prior art, the present invention provides a measuring device for the flashover characteristics of materials considering the influence of humidity, which can flexibly regulate gas humidity, is easy to operate, improves detection efficiency, and at the same time, avoids moisture condensation on the inner wall of the equipment, reduces damage to the equipment, and improves the measurement accuracy of the flashover characteristics of materials under different humidity conditions.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a measuring device for the flashover characteristics of materials considering the influence of humidity, including a sealed detection chamber in a vacuum state, a moisture injection system, a humidity measurement system, a power supply system, a test specimen, and a temperature control module;

[0006] The sealed detection chamber is provided with a moisture inlet channel, a moisture detection channel, and a gas discharge channel. A first valve is provided on the moisture inlet channel, a second valve is provided on the moisture detection channel, and the gas discharge channel is connected to a pumping device;

[0007] The moisture injection system includes a micro-water injection chamber, a micro-water diffusion module, and a dry gas chamber. The micro-water injection chamber is connected to the moisture inlet channel. The micro-water diffusion module is arranged in the micro-water injection chamber. The dry gas chamber is communicated with the micro-water injection chamber through a connecting pipe, and a third valve is provided on the connecting pipe;

[0008] The humidity measurement system includes a moisture sampling chamber and a moisture sensing unit. The moisture sampling chamber is connected to the moisture detection channel, and the moisture sensing unit is disposed in the moisture sampling chamber.

[0009] The power supply system includes two conductive rods, a high-voltage electrode, a low-voltage electrode, and a high-voltage power supply. The two conductive rods are respectively fixed on two opposite inner walls of the sealed detection chamber. The high-voltage electrode and the low-voltage electrode are respectively fixed at free ends of the two conductive rods. The high-voltage power supply is electrically connected to the conductive rod connected to the high-voltage electrode, and the conductive rod connected to the low-voltage electrode is grounded.

[0010] The test specimen to be detected is installed between the high-voltage electrode and the low-voltage electrode.

[0011] The temperature control module covers the sealed detection chamber, the micro-water injection chamber, and the moisture sampling chamber respectively.

[0012] Further, an insulating sheath is provided on the conductive rod.

[0013] Further, a protective resistor is provided between the high-voltage power supply and the conductive rod.

[0014] Further, the micro-water diffusion module is of a porous sponge structure.

[0015] Further, the moisture sensing unit is a moisture sensor, and the moisture sensor is electrically connected to a computer.

[0016] Further, the high-voltage power supply is a high-voltage DC generator, a high-voltage AC generator, or an impulse voltage generator.

[0017] Further, the temperature control module includes a heating device and a temperature controller. The heating device covers the sealed detection chamber, the micro-water injection chamber, and the moisture sampling chamber respectively, and the temperature controller is electrically connected to the heating device.

[0018] Further, the temperature adjustment range of the temperature controller is from 20 degrees to 90 degrees.

[0019] Further, the heating device is a silicone rubber heating plate.

[0020] Further, the humidity of the gas discharged by the moisture injection system is 50 - 35000 μL / L.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The present invention provides a measuring device for the flashover characteristics of a material considering the influence of humidity, comprising a sealed detection chamber in a vacuum state, a moisture injection system, a humidity measurement system, a power supply system, a test specimen, and a temperature control module; the sealed detection chamber is provided with a moisture inlet channel, a moisture detection channel, and a gas discharge channel, a first valve is arranged on the moisture inlet channel, a second valve is arranged on the moisture detection channel, and the gas discharge channel is connected to a pumping device; the moisture injection system comprises a micro-water injection chamber, a micro-water diffusion module, and a dry gas chamber, the micro-water injection chamber is connected to the moisture inlet channel, the micro-water diffusion module is arranged in the micro-water injection chamber, the dry gas chamber is communicated with the micro-water injection chamber through a connecting pipe, and a third valve is arranged on the connecting pipe; the humidity measurement system comprises a moisture sampling chamber and a moisture sensing unit, the moisture sampling chamber is connected to the moisture detection channel, and the moisture sensing unit is arranged in the moisture sampling chamber; the power supply system comprises two conductive rods, a high-voltage electrode, a low-voltage electrode, and a high-voltage power supply, the two conductive rods are respectively fixed on two opposite inner walls of the sealed detection chamber, the high-voltage electrode and the low-voltage electrode are respectively fixed at the free ends of the two conductive rods, the high-voltage power supply is electrically connected to the conductive rod connected to the high-voltage electrode, and the conductive rod connected to the low-voltage electrode is grounded; the test specimen is installed between the high-voltage electrode and the low-voltage electrode; the temperature control module respectively covers the sealed detection chamber, the micro-water injection chamber, and the moisture sampling chamber;

[0023] During use, start the temperature control module for preheating. According to the volume of the sealed detection chamber, calculate the volume of liquid water required for different gas humidities using the ideal gas state equation and other parameters, add the liquid water to the micro-water diffusion module in the micro-water injection chamber to make the liquid water fully diffuse in the micro-water injection chamber; use the pumping device to extract the gas in the inner cavity of the sealed detection chamber to make the inside of the sealed detection chamber in a vacuum state, slowly add dry insulating gas into the dry gas chamber, open the third valve to make the dry insulating gas slowly flow to the micro-water injection chamber, and the dry insulating gas fully mixes with the diffused liquid water in the micro-water injection chamber to form moisture with corresponding humidity. Open the first valve, and utilize the pressure difference to make the moisture flow along the moisture inlet channel to the inner cavity of the sealed detection chamber. Open the second valve to make the moisture introduced into the sealed detection chamber flow into the moisture sampling chamber, use the moisture sensing unit to detect the humidity of the moisture, and according to the displayed humidity data, adjust the volume of the liquid water and the amount of the dry insulating gas in real time, so as to obtain different humidity conditions in the sealed detection chamber, and detect the flashover voltage through the detection circuit composed of the high-voltage power supply, the conductive rod, the high-voltage electrode, the test specimen, and the low-voltage electrode, and measure the flashover characteristics of the test specimen under different humidity conditions;

[0024] The present invention separates the addition of liquid water and dry insulating gas by using a micro-water injection chamber and a dry gas chamber, and the humidity data is fed back in real time through a humidity sensing unit, so as to continuously adjust the addition amounts of liquid water and dry insulating gas, achieving dynamic and precise adjustment. There is no need to pre-configure different concentrations of moisture and repeatedly replace it, which simplifies the operation steps and improves the detection efficiency. At the same time, the present invention uses a temperature control device to cover the sealed detection chamber, the micro-water injection chamber and the moisture sampling chamber respectively, so that the temperature is stable when the moisture flows, which can not only promote the accelerated diffusion of liquid water by the micro-water diffusion module, but also avoid damage to the equipment caused by moisture condensation due to temperature difference, thereby affecting the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Appendix Figure 1 is a schematic structural diagram of the present invention.

[0026] Reference numerals: 1 - sealed detection chamber; 2 - micro-water injection chamber; 3 - dry gas chamber; 4 - first valve; 5 - third valve; 6 - moisture sampling chamber; 7 - moisture sensor; 8 - computer; 9 - conductive rod; 10 - high-voltage electrode; 11 - low-voltage electrode; 12 - high-voltage power supply; 13 - test specimen; 14 - insulating sheath; 15 - protection resistor; 16 - heating device; 17 - thermostat; 18 - air extraction device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The present invention will be described in one of the embodiments below in conjunction with the specific embodiments. Among them, the drawings are only for illustrative purposes and show only schematic diagrams, not physical diagrams, and should not be construed as a limitation of this patent; for better illustration of the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the actual size of the product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] Embodiment

[0029] As Figure 1 shown, this embodiment provides a material flashover characteristic measurement device considering the influence of humidity, including a sealed detection chamber 1 in a vacuum state, a moisture injection system, a humidity measurement system, a power supply system, a test specimen 13, and a temperature control module;

[0030] The sealed detection chamber 1 is provided with a moisture inlet channel, a moisture detection channel and a gas discharge channel. A first valve 4 is provided on the moisture inlet channel, a second valve is provided on the moisture detection channel, and the gas discharge channel is connected to the air extraction device 18;

[0031] The moisture injection system includes a micro-water injection chamber 2, a micro-water diffusion module, and a dry gas chamber 3. The micro-water injection chamber 2 is connected to a moisture inlet channel. The micro-water diffusion module is arranged inside the micro-water injection chamber 2. The dry gas chamber 3 is communicated with the micro-water injection chamber 2 through a connecting pipe, and a third valve 5 is provided on the connecting pipe;

[0032] The humidity measurement system includes a moisture sampling chamber 6 and a moisture sensing unit. The moisture sampling chamber 6 is connected to a moisture detection channel. The moisture sensing unit is arranged inside the moisture sampling chamber 6;

[0033] The power supply system includes two conductive rods 9, a high-voltage electrode 10, a low-voltage electrode 11, and a high-voltage power supply 12. The two conductive rods 9 are respectively fixed on two opposite inner walls of the sealed detection chamber 1. The high-voltage electrode 10 and the low-voltage electrode 11 are respectively fixed at the free ends of the two conductive rods 9. The high-voltage power supply 12 is electrically connected to the conductive rod 9 to which the high-voltage electrode 10 is connected, and the conductive rod 9 to which the low-voltage electrode 11 is connected is grounded;

[0034] The test specimen 13 is installed between the high-voltage electrode 10 and the low-voltage electrode 11;

[0035] The temperature control module respectively covers the sealed detection chamber 1, the micro-water injection chamber 2, and the moisture sampling chamber 6;

[0036] It should be noted that the sealed detection chamber 1 is used to provide a detection environment for the test specimen 13. When the first valve 4 and the second valve are closed, the inside of the sealed detection chamber 1 is in a sealed state. On the one hand, it is convenient for the air extraction device 18 to extract the gas in the cavity of the sealed detection chamber 1, so that the sealed detection chamber 1 reaches a vacuum state, which is convenient for introducing moisture into the sealed detection chamber 1 to form a humidity environment by using the pressure difference. On the other hand, it is used to discharge the interference of other impurity factors, such as foreign particles and other impurities, which affect the accuracy of the detection results;

[0037] The moisture injection system is used to dynamically adjust the ratio of liquid water to dry insulating gas, so as to adjust the humidity. Among them, the dry gas chamber 3 is used to store insulating dry gas. The micro-water diffusion module is used to adsorb liquid water, and atomize and diffuse the liquid water into the micro-water injection chamber 2 by using the temperature regulated by the temperature control module. The micro-water injection chamber 2 is used to store the micro-water diffusion module and provide a reaction place for the mixing of insulating dry gas and atomized liquid water to form moisture. The first valve 4 is used to control the on-off of the moisture inlet channel and the amount of gas entering the sealed detection chamber 1. The second valve is used to control the on-off of the moisture detection channel and the amount of gas entering the moisture sampling chamber 6. The third valve 5 is used to control the on-off of the connecting pipe connecting the dry gas chamber 3 and the micro-water injection chamber 2, and the amount of insulating dry gas entering the micro-water injection chamber 2;

[0038] The moisture detection system is used to monitor the humidity data in the sealed detection chamber 1, and feedback the volume of liquid water and the gas volume of the insulating dry gas required under different humidity conditions, so as to dynamically increase or decrease the liquid water and the insulating dry gas;

[0039] The power supply system is used to form a detection circuit with the high-voltage power supply 12, the conductive rod 9, the high-voltage electrode 10, the test specimen 13, and the low-voltage electrode 11, and detect the flashover voltage on the test specimen 13 under different humidity conditions, so as to detect the influence of humidity on the flashover characteristics of the material;

[0040] The temperature control module is used to preheat the device and adjust the temperature between regions, so that moisture does not condense when flowing, thus adhering to the device, damaging the device and affecting the measurement.

[0041] The present invention separately adds liquid water and dry insulating gas by using the micro-water injection chamber 2 and the dry gas chamber 3, and real-time feedbacks humidity data through the moisture sensing unit, so as to continuously adjust the addition amounts of liquid water and dry insulating gas, realizing dynamic and precise adjustment. There is no need to pre-configure different concentrations of moisture and repeatedly replace it, simplifying the operation steps and improving the detection efficiency. At the same time, the present invention uses a temperature control device to cover the sealed detection chamber 1, the micro-water injection chamber 2 and the moisture sampling chamber 6 respectively, so that the temperature of the flowing moisture is stable, which can not only promote the accelerated diffusion of liquid water by the micro-water diffusion module, but also avoid moisture condensation due to temperature difference, avoid damaging the device and affecting the moisture concentration, thereby improving the measurement accuracy of the flashover characteristics of the material.

[0042] Further, as Figure 1 shown, in order to prevent moisture-containing moisture from adhering to the conductive rod 9, an insulating sheath 14 is provided on the conductive rod 9.

[0043] It should be noted that the insulating sheath 14 is used to prevent moisture from condensing on the conductive rod 9 and prevent potential safety hazards at the same time.

[0044] Further, as Figure 1 shown, in order to prevent the detection circuit from being short-circuited and protect the safety of the device, a protection resistor 15 is provided between the high-voltage power supply 12 and the conductive rod 9.

[0045] It should be noted that for the convenience of connection, the protection resistor 15 is preferably arranged between the conductive rod 9 connected to the high-voltage electrode 10 and the high-voltage power supply 12.

[0046] Further, as Figure 1 shown, in order to facilitate the diffusion and storage of liquid water in the micro-water injection chamber 2, the micro-water diffusion module is a porous sponge structure.

[0047] It should be noted that, on the one hand, the porous sponge structure has a large water storage capacity, and adsorbs liquid water within the sponge structure, facilitating the storage of liquid water and preventing liquid water leakage. On the other hand, the porous sponge structure keeps the liquid water at a relatively large distance from each other, facilitating the diffusion and atomization of liquid water in a thermal environment, and at the same time having a relatively large contact area with the dry insulating gas, which is conducive to the formation of moisture.

[0048] Furthermore, as Figure 1 shown, in order to facilitate real-time feedback of humidity data, the moisture sensing unit is a moisture sensor 7, and the moisture sensor 7 is electrically connected to a computer 8.

[0049] It should be noted that the moisture sensor 7 can detect the humidity of the gas and measure the water content of the gas. The computer 8 can record and read the humidity data. Based on the recorded humidity data, the volume of liquid water and the amount of dry insulating gas at different humidities can be calculated in real time, so as to dynamically adjust the corresponding volume of liquid water and the amount of dry insulating gas to ensure the accuracy of the humidity in the sealed test chamber 1.

[0050] Furthermore, as Figure 1 shown, the high-voltage power supply 12 is a high-voltage DC generator, a high-voltage AC generator, or an impulse voltage generator.

[0051] It should be noted that flashover voltage tests of AC, DC, and impulse voltages can be realized in the sealed test chamber 1. At the same time, the high-voltage power supply 12 can also be a high-voltage generator with superposition of multiple types of voltages for flashover voltage tests of superposed voltages.

[0052] Furthermore, as Figure 1 shown, the temperature control module includes a heating device 16 and a thermostat 17. The heating device 16 covers the sealed test chamber 1, the micro-water injection chamber 2, and the moisture sampling chamber 6 respectively, and the thermostat 17 is electrically connected to the heating device 16.

[0053] It should be noted that the heating device 16 covers the sealed test chamber 1, the micro-water injection chamber 2, the moisture sampling chamber 6, and the moisture flow channel. The heating device 16 is used to maintain the temperature stability in each part of the area to prevent moisture condensation during the flow process. The thermostat 17 is used to adjust the heating temperature of the heating device 16, and the thermostat 17 and the heating device 16 can achieve zoned temperature adjustment. However, as the moisture flows towards the sealed test chamber 1, the temperature gradually increases to avoid moisture condensation due to temperature difference in the high-humidity gas.

[0054] Furthermore, in this embodiment, the temperature adjustment range of the thermostat 17 is preferably set to 20 degrees to 90 degrees for convenient experimental detection.

[0055] Furthermore, in order to facilitate the installation of the heating device 16 and control costs at the same time, in this embodiment, the heating device 16 is preferably set as a silicone rubber heating plate.

[0056] Furthermore, the humidity of the gas discharged by the moisture injection system is 50 - 35000 μL / L.

[0057] It should be noted that for the convenience of controlling the humidity of the gas, in this embodiment, the dynamic adjustment range of the moisture humidity is preferably set to 50 - 35000 μL / L. At the same time, during the dynamic adjustment process, only high-pressure dry insulating gas and liquid water are needed, and there is no need to use calibrated gas with different water contents. This can not only avoid frequent replacement of the calibrated gas and simplify the operation steps, but also avoid affecting the measurement accuracy due to unqualified calibrated gas.

[0058] Working principle:

[0059] During use, start the temperature control module for preheating. According to the volume of the sealed detection chamber 1, calculate the volume of liquid water required for different gas humidities using the ideal gas state equation and other parameters, and add the liquid water to the micro-water diffusion module in the micro-water injection chamber 2 to make the liquid water fully diffuse in the micro-water injection chamber 2; use the air extraction device 18 to extract the gas in the inner cavity of the sealed detection chamber 1 to make the inside of the sealed detection chamber 1 in a vacuum state. Slowly add dry insulating gas into the dry gas chamber 3, open the third valve 5 to make the dry insulating gas slowly flow to the micro-water injection chamber 2. The dry insulating gas fully mixes with the diffused liquid water in the micro-water injection chamber 2 to form moist gas with corresponding humidity. Open the first valve 4, and using the pressure difference, the moist gas flows along the moist gas inlet channel to the cavity of the sealed detection chamber 1. Open the second valve to make the moist gas injected into the sealed detection chamber 1 flow into the moist gas sampling chamber 6. Use the moist gas sensing unit to detect the humidity of the moist gas. According to the displayed humidity data, adjust the volume of liquid water and the amount of dry insulating gas in real time, so as to obtain different humidity conditions in the sealed detection chamber 1. Detect the flashover voltage through the detection circuit composed of the high-voltage power supply 12, the conductive rod 9, the high-voltage electrode 10, the test specimen 13, and the low-voltage electrode 11, and measure the flashover characteristics of the test specimen 13 under different humidity conditions.

[0060] In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. Additionally, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the meaning of "and / or" that appears throughout the text is that it includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously.

[0061] Obviously, the above embodiments of the present invention are merely examples given for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention, or directly / indirectly applied in other related technical fields, should be included within the protection scope of the claims of the present invention.

Claims

1. A measuring device for the flashover characteristics of a material considering the influence of humidity, characterized in that, It includes a sealed detection chamber in a vacuum state, a moisture injection system, a humidity measurement system, a power supply system, a test specimen, and a temperature control module; The sealed detection chamber is provided with a moisture inlet channel, a moisture detection channel, and a gas discharge channel. A first valve is provided on the moisture inlet channel, a second valve is provided on the moisture detection channel, and the gas discharge channel is connected to a pumping device; The moisture injection system includes a micro-water injection chamber, a micro-water diffusion module, and a dry gas chamber. The micro-water injection chamber is connected to the moisture inlet channel. The micro-water diffusion module is arranged in the micro-water injection chamber. The dry gas chamber is communicated with the micro-water injection chamber through a connecting pipe, and a third valve is provided on the connecting pipe; The humidity measurement system includes a moisture sampling chamber and a moisture sensing unit. The moisture sampling chamber is connected to the moisture detection channel, and the moisture sensing unit is arranged in the moisture sampling chamber; The power supply system includes two conductive rods, a high-voltage electrode, a low-voltage electrode, and a high-voltage power supply. The two conductive rods are respectively fixed on two opposite inner walls of the sealed detection chamber. The high-voltage electrode and the low-voltage electrode are respectively fixed at the free ends of the two conductive rods. The high-voltage power supply is electrically connected to the conductive rod connected to the high-voltage electrode, and the conductive rod connected to the low-voltage electrode is grounded; The test specimen is installed between the high-voltage electrode and the low-voltage electrode; The temperature control module respectively covers the sealed detection chamber, the micro-water injection chamber, and the moisture sampling chamber; the temperature control module includes a heating device and a temperature controller. The heating device respectively covers the sealed detection chamber, the micro-water injection chamber, and the moisture sampling chamber, and the temperature controller is electrically connected to the heating device; During use, start the temperature control device for preheating. Calculate the volume of liquid water required for different gas humidities according to the volume of the inner cavity of the high-voltage bushing. Add the liquid water to the water addition chamber, and use the temperature control device to regulate the temperature so that the liquid water vaporizes in the water addition chamber; use the suction device to pump out the gas in the inner cavity of the high-voltage bushing to make the inside of the high-voltage bushing in a vacuum state. Slowly add dry insulating gas to the gas addition chamber. Open the first valve to make the dry insulating gas slowly flow into the water addition chamber. The dry insulating gas fully mixes with the vaporized liquid water in the water addition chamber to form moisture with a corresponding humidity. Open the second valve. Using the pressure difference, the moisture flows into the high-voltage bushing from the air inlet on the bushing flange along the second channel. Open the third valve to make the moisture pumped into the high-voltage bushing flow into the moisture sampling chamber. Use the moisture sensing device to detect the humidity of the moisture. According to the displayed humidity data, adjust the volume of the liquid water and the content of the dry insulating gas in real time; The temperature adjustment range of the temperature controller is from 20 degrees to 90 degrees; The humidity of the gas discharged by the moisture injection system is 50 - 35000 μL / L.

2. The measuring device for the flashover characteristics of a material considering the influence of humidity according to claim 1, characterized in that, Insulating sheaths are provided on the conductive rods.

3. The measuring device for the flashover characteristics of a material considering the influence of humidity according to claim 2, characterized in that, A protective resistor is provided between the high-voltage power supply and the conductive rod.

4. The measuring device for the flashover characteristics of a material considering humidity influence according to claim 3, characterized in that, The micro-water diffusion module is of a porous sponge structure.

5. The measuring device for the flashover characteristics of a material considering humidity influence according to claim 4, characterized in that, The moisture sensing unit is a moisture sensor, and the moisture sensor is electrically connected to a computer.

6. The measuring device for the flashover characteristics of a material considering the influence of humidity according to claim 5, wherein, The high-voltage power supply is a high-voltage DC generator, a high-voltage AC generator, or an impulse voltage generator.

7. A measuring device for the flashover characteristics of a material considering humidity effects according to any one of claims 1-6, characterized in that, The heating device is a silicone rubber heating plate.

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