Verification platform and detection method of hydrogen online monitoring device

Abstract

The invention discloses a verification platform of a hydrogen online monitoring device. The verification platform comprises a single hydrogen test device, a circulating pump, an oil inlet pipe and an oil outlet pipe, the single hydrogen test device comprises a plurality of oil inlet assemblies, the end portion of each oil inlet assembly comprises a detection installation part, each detection installation part comprises three connecting ends, one connecting end is connected with the single hydrogen test device and is the same as the single hydrogen test device, one connecting end is connected with an oil inlet pipe, and one connecting end is used for being connected with a hydrogen sensor. The detection end of the hydrogen sensor goes deep into the detection mounting piece; the bottom of the single hydrogen testing device is connected with a circulating pump through an oil outlet pipe, and the circulating pump is connected with a detection mounting piece of the single hydrogen testing device through an oil inlet pipe to form circulation; and transformer oil is stored in the single hydrogen test device. The device has the beneficial effects that the accuracy of data monitored by the hydrogen sensor is greatly improved, and the verification work of the hydrogen sensor is realized.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, in particular to a detection method for a calibration platform of a hydrogen online monitoring device. Background Art

[0002] The transformer is one of the most core power equipment in the power transmission system. Whether the transformer can work normally affects the stability and reliability of the power transmission network. When the transformer fails, the transformer oil will produce characteristic dissolved gas. At present, the content of dissolved gas in power transformer oil is an important indicator for judging the working status of the transformer. Gas detection in transformer oil is mainly divided into multi-gas detection and single gas detection, and the preferred gas for single gas detection is hydrogen, so the detection of hydrogen concentration in transformer oil is of great significance. However, during the use of hydrogen sensors, due to long use time and other reasons, they will fail or be inaccurate. It is necessary to quickly and accurately calibrate the hydrogen sensors to ensure their normal operation. The calibration of hydrogen sensors is to ensure the accuracy of their detection results and prevent safety accidents caused by hydrogen sensor failures.

[0003] The detection accuracy of a hydrogen sensor is critical to its performance. Under different operating environments, the sensitivity of the sensor may change, which requires regular calibration to ensure that it can still accurately measure the concentration of hydrogen. The calibration process usually involves placing the sensor in an environment with a known concentration of hydrogen and comparing the difference between its reading and the actual concentration.

[0004] Ensure safety: Hydrogen is a flammable and explosive gas. If the reading of the hydrogen sensor is inaccurate, it may cause a safety accident. Through regular calibration, the failure or drift of the sensor can be discovered in time, and repaired or replaced, so as to ensure safety during use.

[0005] Avoid error accumulation: During long-term use, hydrogen sensors may degrade in performance due to contamination, wear or other factors. If not calibrated regularly, such errors will gradually accumulate and eventually affect the accuracy of the measurement results. The calibration process can help clear these accumulated errors and keep the sensor in optimal working condition. Improve monitoring efficiency: Calibrated hydrogen sensors can provide more accurate data, thereby improving monitoring efficiency and decision-making quality. In application scenarios such as the energy industry, food industry, and medical field, accurate hydrogen concentration information is crucial to preventing accidents and optimizing operating processes.

[0006] Especially on the high-voltage bushing riser on the grid side of the converter transformer, especially the M-type or H-type bushing riser is higher than the main box cover, the transformer oil in the riser is less exchanged with the main body, and it is far away from the online monitoring sampling point, and a "dead oil zone" will be formed locally. When the outgoing line devices, bushings, etc. in this area have potential defects or developing faults, it will take at least 3 hours for the chromatogram to diffuse to the main body and be detected by the online oil chromatography. The oil chromatography online monitoring device installed on the converter transformer body is not conducive to early warning of the riser area.

[0007] Therefore, rapid and sensitive single-component or multi-component chromatographic online detection has become a research direction for early warning of casing failure.

[0008] At present, there are rapid hydrogen monitoring devices based on palladium-nickel alloy hydrogen physical adsorption in China, which can be directly immersed in transformer oil to measure dissolved hydrogen without oil-gas separation. The rapid hydrogen monitoring device has a palladium alloy microchip sensor with a proprietary protective coating inside. The palladium catalyzes the conversion of hydrogen molecules dissolved in the transformer oil into hydrogen atoms. The hydrogen atoms diffuse into the palladium alloy lattice, causing expansion and phase change inside the lattice, causing changes in the electrical properties of the metal film, and the hydrogen concentration is measured by monitoring the rate of change of the electrical properties. However, this method is complicated and time-consuming.

[0009] Therefore, if the rapid hydrogen monitoring device can meet the accuracy and speed requirements of real-time online monitoring, it can serve as a beneficial supplement to the multi-component monitoring technology of dissolved gas in the transformer body oil, and improve the early fault warning capability in the converter transformer bushing riser area. Therefore, it is particularly necessary to carry out necessity and feasibility analysis of installing rapid hydrogen monitoring devices on the converter transformer bushing riser.

[0010] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art known to a person skilled in the art. Summary of the invention

[0011] The technical problem to be solved by the present invention is: how to solve the problem that the current hydrogen sensor calibration accuracy is not accurate enough and the calibration speed is slow.

[0012] The present invention solves the above technical problems through the following technical means:

[0013] A calibration platform for a hydrogen online monitoring device, comprising a single hydrogen test device, a circulation pump, an oil inlet pipe, and an oil outlet pipe;

[0014] The single hydrogen test device includes a plurality of oil inlet assemblies, the ends of the oil inlet assemblies include detection mounting parts, the detection mounting parts include three connection ends, one of which is connected to and identical to the single hydrogen test device, one of which is connected to the oil inlet pipe, one of which is used to connect to a hydrogen sensor, and the detection end of the hydrogen sensor is deeply inside the detection mounting part;

[0015] The bottom of the single hydrogen test device is connected to a circulation pump through an oil outlet pipe, and the circulation pump is connected to the detection installation part of the single hydrogen test device through an oil inlet pipe to form a circulation;

[0016] Transformer oil is stored in the single hydrogen test device.

[0017] The single hydrogen test device of the present invention stores standard transformer oil, and the transformer oil in the single hydrogen test device is drawn out from the oil outlet pipe through a circulation pump and then returned to the single hydrogen test device. In this process, the oil flows under the action of the circulation pump, which plays a good stirring role, avoids dead corners, and makes the hydrogen content in the transformer oil uniform. At the same time, the detection end of the hydrogen sensor goes deep into the detection installation part to measure the flowing transformer oil. The transformer oil is in full contact with the detection part of the hydrogen sensor, which greatly improves the accuracy of the detection data of the hydrogen sensor and realizes the calibration of the hydrogen sensor.

[0018] Preferably, the single hydrogen test device comprises an oil pillow and a tank body; the oil pillow is connected to the tank body and communicated with the tank body; the oil inlet assembly is connected to the tank body, and the oil outlet pipe is connected to the tank body.

[0019] Preferably, the oil pillow includes an oil pillow cylinder, a liquid level gauge, a breather, and a second ball valve. The oil pillow cylinder is connected to the top surface of the tank body through a bracket, the end of the oil pillow cylinder is connected to the liquid level gauge, the breather is connected to the top of the oil pillow cylinder through a bent pipe, and the second ball valve is connected to the bottom oil outlet of the oil pillow cylinder.

[0020] The present invention is provided with an oil pillow, which can discharge the gas in the tank of the test device, and can improve the accuracy of the detection data of the hydrogen sensor.

[0021] Preferably, the oil inlet assembly includes an oil inlet flange and a first ball valve, the oil inlet flange is connected to the tank body, one end of the first ball valve is connected to the oil inlet flange, and the other end of the first ball valve is connected to the detection mounting component.

[0022] Preferably, a heating plate is connected to the outside of the tank body, and a temperature sensor is connected to the top of the tank body.

[0023] Preferably, a buffer tank is further included, the bottom of which is connected to the circulating pump, the buffer tank includes a plurality of outlets, and the oil inlet pipe is connected to the outlet of the buffer tank.

[0024] Preferably, it further comprises a movable chassis, and the single hydrogen test device and the circulation pump are installed on the movable chassis.

[0025] The movable chassis makes it easy to move the calibration platform to the site of the equipment to be tested for calibration.

[0026] Preferably, the device further comprises a controller, wherein the controller is connected to the circulation pump and the hydrogen sensor.

[0027] The present invention also discloses a calibration method for a hydrogen online monitoring device, which uses the calibration platform of the hydrogen online monitoring device, and comprises the following steps:

[0028] Move the calibration platform of the hydrogen online monitoring device to the place where the equipment to be tested is used, remove the hydrogen sensor of the equipment to be tested and connect it to the connecting end of the detection mounting piece;

[0029] The single hydrogen test device is filled with transformer oil, and the circulation pump is started. The transformer oil enters the circulation pump through the oil outlet pipe, then enters the detection installation through the oil inlet pipe, and finally circulates into the single hydrogen test device. When the transformer oil passes through the detection installation, it fully contacts the hydrogen sensor installed on the detection installation to calibrate the hydrogen sensor.

[0030] Preferably, the single hydrogen test device includes an oil pillow and a tank body, the outer wall of the tank body is connected to a heating plate, the heating plate is connected to a controller, the oil temperature in the tank body is controlled by the heating plate, and the hydrogen content is detected at different oil temperatures.

[0031] The advantages of the present invention are:

[0032] The single hydrogen test device of the present invention stores standard transformer oil, and the transformer oil in the single hydrogen test device is drawn out from the oil outlet pipe through a circulation pump and then returned to the single hydrogen test device. In this process, the oil flows under the action of the circulation pump, which plays a good stirring role, avoids dead corners, and makes the hydrogen content in the transformer oil uniform. At the same time, the detection end of the hydrogen sensor goes deep into the detection installation part to measure the flowing transformer oil. The transformer oil is in full contact with the detection part of the hydrogen sensor, which greatly improves the accuracy of the detection data of the hydrogen sensor and realizes the calibration of the hydrogen sensor.

[0033] The present invention is provided with an oil pillow, which can discharge the gas in the tank of the test device, and can improve the accuracy of the detection data of the hydrogen sensor.

[0034] The movable chassis makes it easy to move the calibration platform to the site of the equipment to be tested for calibration.

[0035] When used in UHV stations, such mobile calibration devices can be used to monitor the operating status of equipment in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 2 is a schematic diagram of the structure of a calibration platform of a hydrogen online monitoring device according to an embodiment of the present invention;

[0037] Figure 2 2 is a schematic diagram of the structure of a calibration platform of a hydrogen online monitoring device according to an embodiment of the present invention;

[0038] Figure 3 2 is a schematic diagram of the structure of an oil pillow according to an embodiment of the present invention;

[0039] Figure 4 Schematic diagram of the installation of a hydrogen sensor according to an embodiment of the present invention;

[0040] Numbers in the figure:

[0041] 1. Single hydrogen test device; 11. Oil pillow; 111. Oil pillow cylinder; 112. Liquid level gauge; 113. Respirator; 114. Second ball valve; 12. Tank; 13. Oil inlet flange; 14. First ball valve; 15. Detection mounting; 16. Temperature sensor; 17. Heating plate;

[0042] 2. Circulation pump; 3. Buffer tank; 4. Oil inlet pipe; 41. Adapter flange; 5. Oil outlet pipe; 6. Controller; 7. Movable chassis;

[0043] 8. Hydrogen sensor; 81. Mounting flange. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are 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.

[0045] Embodiment 1:

[0046] like Figure 1 As shown, a calibration platform for a hydrogen online monitoring device includes a single hydrogen test device 1, a circulating pump 2, a buffer tank 3, an oil inlet pipe 4, and an oil outlet pipe 5; the bottom of the single hydrogen test device 1 is connected to the oil outlet pipe 5, and the other end of the oil outlet pipe 5 is connected to the circulating pump 2, and the circulating pump 2 is connected to the bottom of the buffer tank 3, wherein the buffer tank 3 includes a plurality of outlets, and each outlet is connected to the single hydrogen test device 1 again through the oil inlet pipe 4.

[0047] The single hydrogen test device 1 stores standard transformer oil or standard oil without acetylene. Of course, in this embodiment, the standard oil of the single hydrogen sensor does not contain acetylene, which is also detected.

[0048] The single hydrogen test device 1 includes an oil pillow 11, a tank body 12, and a plurality of oil inlet assemblies; the oil pillow 11 is connected to the tank body 12 and communicates with the tank body 12; the oil inlet assembly is connected to the tank body 12, and the oil inlet assembly is along the outside of the tank body 12, and the oil inlet assembly can be evenly arranged at the top and bottom of the tank body 12. The oil inlet assembly includes an oil inlet flange 13, a first ball valve 14, and a detection mounting member 15. The oil inlet flange 13 is connected to the tank body 12, one end of the first ball valve 14 is connected to the oil inlet flange 13, and the other end of the first ball valve 14 is connected to the detection mounting member 15. The detection mounting member 15 includes three connecting ends, one of which is connected to and identical to the first ball valve 14, the bottom connecting end is connected to the oil inlet pipe 4, and the end connecting end is used to connect the hydrogen sensor 8. The detection end of the hydrogen sensor 8 is deeply inside the detection mounting member 15, and can obtain the hydrogen value in the standard transformer oil.

[0049] The function of the oil pillow 11 is to discharge the gas in the tank body 12 to avoid internal gas accumulation and affect the hydrogen detection data. The two ends of the oil pillow 11 are connected to the tank body 12 through brackets, and the middle position of the bottom of the oil pillow 11 is connected to the tank body 12 through a valve and a stainless steel bellows. The valve is used to connect and disconnect the two, and the stainless steel bellows can be used for shock absorption.

[0050] like Figure 3 As shown, the oil pillow 11 includes an oil pillow tube 111, a liquid level gauge 112, a respirator 113, and a second ball valve 114. The oil pillow tube 111 is connected to the top surface of the tank body 12 through a bracket. The end of the oil pillow tube 111 is connected to the liquid level gauge 112, and the internal liquid level height can be observed by observing the liquid level gauge 112. The respirator 113 is connected to the top of the oil pillow tube 111 through a bend pipe, and a desiccant is installed inside and communicated with the atmosphere. The second ball valve 114 is fixed to the bottom oil outlet of the oil pillow tube 111 by bolts M12x55, flat washers φ12, spring washers φ12, and nuts M12, and is sealed by a polytetrafluoroethylene gasket. The second ball valve 114 is used for the discharge of oil.

[0051] This embodiment is provided with an oil pillow 11, which can fully discharge the gas in the tank of the test device, and can improve the accuracy of the detection data of the hydrogen sensor 8. An air bag is provided in the oil pillow 11, and the air bag is connected to the respirator 113, and the respirator 113 is connected to the atmosphere. When the oil in the tank 12 is full and the liquid level of the liquid level gauge 112 of the oil pillow 11 reaches a certain position, the gas in the tank 12 is discharged from the oil pillow 11 through the respirator 113. The gas in the tank 12 can be discharged in real time to avoid internal gas accumulation and affect the hydrogen detection data.

[0052] The tank body 12 is a cylindrical structure filled with oil. The tank body 12 can be formed by sealing the tank barrel and the top cover plate by bolts, and the top cover plate is provided with a lifting lug for easy lifting. The top of the tank body 12 is connected to a temperature sensor 16, and the temperature sensor 16 is used to measure the temperature change inside the tank body 12. The top of the tank body 12 can also be provided with an oil filling port.

[0053] The oil inlet flange 13 is sealed and connected to the first ball valve 14, and the first ball valve 14 is sealed and connected to the detection installation part 15. Specifically, the first ball valve 14 (a total of thirteen) is installed on the DN25 oil inlet flange 13 on the tank body 12 through bolts M12x55, flat washers φ12, spring washers φ12, and nuts M12, and is sealed through polytetrafluoroethylene gaskets. The first ball valve 14 and the detection installation part 15 are installed through bolts M12x55, flat washers φ12, spring washers φ12, and nuts M12, and are sealed through polytetrafluoroethylene gaskets.

[0054] like Figure 4 As shown, the detection mounting member 15 is substantially a three-way structure, the left end of which is connected to the first ball valve 14 via a flange, the right end of which is connected to the mounting flange 81, and the mounting flange 81 is connected to the hydrogen sensor 8. The bottom end of the detection mounting member 15 is connected to the adapter flange 41.

[0055] It should be noted that: when it is necessary to detect the hydrogen sensor 8, the hydrogen sensor 8 is connected to the mounting flange 81, and then the mounting flange 81 is sealed and connected to the right end flange of the detection mounting member 15; if the detection mounting member 15 is not needed, there are multiple detection mounting members 15 in this embodiment, and multiple hydrogen sensors 8 can be detected at the same time according to actual needs, but not all detection mounting members 15 must be used. For example, if only three hydrogen sensors 8 are detected in a certain detection, then only three detection mounting members 15 are needed, and the remaining unused detection mounting members 15 can be closed by closing the detection mounting members 15 through the closed mounting flange 81, and the first ball valve 14 connected thereto is closed at the same time.

[0056] The mounting flange 81 is divided into a type capable of mounting the hydrogen sensor 8 and a closed type. The mounting flange 81 capable of mounting the hydrogen sensor 8 has a through mounting opening, and the hydrogen sensor 8 is sealed and connected to the mounting opening. The closed mounting flange 81 is a flat plate structure and cannot be used to mount the hydrogen sensor 8. When in use, the closed mounting flange 81 can be replaced with the mounting flange 81 on which the hydrogen sensor 8 is mounted.

[0057] This embodiment only provides one installation form of the mounting flange 81 , and as long as it can meet the detection requirements of the hydrogen sensor 8 , it can be installed on the detection mounting member 15 .

[0058] The mounting flange 81 is fixed by bolts M12x55, flat washers φ12, spring washers φ12, and nuts M12, and is connected to the right end of the mounting detection component by means of a fluororubber sealing ring in the middle.

[0059] In actual use, 1 to 10 hydrogen sensors 8 may be installed according to the actual number of hydrogen sensors 8 used.

[0060] The adapter flange 41 at the bottom end of the detection mounting member 15 is mainly used to connect the oil inlet pipe 4 .

[0061] The buffer tank 3 is installed on the DN25 flange of the circulation pump 2 by bolts M12x55, flat washers φ12, spring washers φ12, and nuts M12, and is sealed by polytetrafluoroethylene gaskets. The oil outlet pipe 5 is fixed to the DN32 flange of the tank body 12 by bolts M14x55, flat washers φ14, spring washers φ14, and nuts M14, and is sealed by polytetrafluoroethylene gaskets. The oil inlet pipe 4 connects the buffer tank 3 with the tank body 12.

[0062] In this embodiment, the buffer tank 3 includes a plurality of outlets, one end of the oil inlet pipe 4 is connected to the outlet of the buffer tank 3 , and the other end of the oil inlet pipe 4 is connected to the adapter flange 41 .

[0063] In this embodiment, transformer oil is stored in the single hydrogen test device 1. The transformer oil in the single hydrogen test device 1 is drawn out from the oil outlet pipe 5 through the circulation pump 2 and enters the buffer tank 3. The oil in the buffer tank 3 is then returned to the single hydrogen test device 1 through the oil inlet pipe 4. In this process, the oil flows under the action of the circulation pump 2, which plays a good stirring role, avoids dead corners, and makes the hydrogen content in the transformer oil uniform. At the same time, the detection end of the hydrogen sensor 8 penetrates into the detection mounting part 15 to measure the flowing transformer oil. The transformer oil is fully in contact with the detection part of the hydrogen sensor 8, which greatly improves the accuracy of the detection data of the hydrogen sensor and realizes the calibration of the hydrogen sensor 8.

[0064] This embodiment completely solves the problem of dead zones by providing the detection mounting member 15 and oil circulation, improves the detection accuracy, and can provide early warning of high-seat areas more accurately.

[0065] Embodiment 2:

[0066] like Figure 1 As shown, in this embodiment, based on the first embodiment, the tank body 12 is externally connected to a heating plate 17 , and the top of the tank body is connected to a temperature sensor 16 .

[0067] The present embodiment further includes a controller 6, and a heating plate 17 is connected to the controller 6. The heating plate 17 may be a built-in electric heating wire or other forms of heating, and the heating temperature may be controlled by the controller 6. At the same time, a temperature sensor 16 is connected to the controller 6, and may be used to detect the oil temperature in the tank 12 in real time.

[0068] The controller 6 may also be connected to the hydrogen sensor 8 to record detection process data.

[0069] Specifically, the heating plate 17 is connected to the outside of the tank body 12 through a plurality of tension springs. In this embodiment, the heating plate 17 is a cylindrical structure. This embodiment is not limited to the installation method of the heating plate 17, nor is it limited to the specific shape of the heating plate 17. A heating wire may be wound around the outside of the tank body 12, or heating may be achieved through other heat exchange media, such as water.

[0070] In this embodiment, a heating plate 17 is provided on the outer wall of the tank body 12, which can control the oil temperature in the tank body 12 and monitor the hydrogen content at different oil temperatures.

[0071] Embodiment three:

[0072] like Figure 1 , Figure 2 As shown, this embodiment, based on the above-mentioned embodiment one or two, further includes a movable chassis 7, and the single hydrogen test device 1 and the circulation pump 2 are installed on the movable chassis 7.

[0073] The movable chassis 7 and the tank 12 are fixed by bolts M14x30, flat washers φ14, spring washers φ14, and nuts M14, and the circulating pump 2 is fixed to the movable chassis 7 by bolts M8x20, flat washers φ8, and spring washers φ8. The controller 6 is connected to the movable chassis 7 by bolts or welding.

[0074] The bottom of the movable chassis 7 is connected to universal wheels, which can be easily moved.

[0075] The movable chassis 7 can realize the integration of the monitoring platform, facilitate the overall transportation, and facilitate the movement of the verification platform to the site of the equipment to be monitored for verification.

[0076] Embodiment 4:

[0077] This embodiment discloses a calibration method for a hydrogen online monitoring device, using the calibration platform for the hydrogen online monitoring device in the above embodiment, including the following steps:

[0078] Move the calibration platform of the hydrogen online monitoring device to the place where the equipment to be monitored is used, remove the hydrogen sensor 8 of the equipment to be monitored and connect it to the connecting end of the detection mounting member 15;

[0079] The single hydrogen test device 1 is filled with transformer oil, and the circulating pump 2 is started. The transformer oil enters the circulating pump 2 through the oil outlet pipe 5. The circulating pump 2 pumps the oil into the buffer tank. The oil in the buffer tank then enters the detection installation 15 through the oil inlet pipe 4 and circulates to the single hydrogen test device 1. When the transformer oil passes through the detection installation 15, it fully contacts the hydrogen sensor 8 installed on the detection installation 15, and the hydrogen sensor 8 is calibrated.

[0080] In this embodiment, the first ball valve is connected to the hydrogen sensor 8 through the detection mounting member 15. The oil enters through the bottom end of the detection mounting member 15 and fully contacts the detection part of the hydrogen sensor 8. Under the action of the circulation pump 2, the oil in the tank body 12 flows, which plays a good stirring role and greatly improves the accuracy of the detection data of the hydrogen sensor 8. In this embodiment, an oil pillow 11 is provided to discharge the excess in the tank body 12, which greatly improves the accuracy of the detection data of the hydrogen sensor 8 and ensures the accuracy of the detection data of the hydrogen sensor 8.

[0081] The outer wall of the tank body 12 is connected to a heating plate 17 , and the heating plate 17 is connected to a controller 6 . The oil temperature in the tank body 12 is controlled by the heating plate 17 , and the hydrogen content is monitored at different oil temperatures.

[0082] If the reading displayed by the hydrogen sensor 8 is inconsistent with the known concentration parameter in the transformer oil, it means that the hydrogen sensor 8 is inaccurate or malfunctioning, and needs to be repaired or replaced. On the contrary, if it is consistent or the error is very small, it means that the hydrogen sensor 8 can still be used.

[0083] 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 calibration platform for a hydrogen online monitoring device, characterized in that: It includes single hydrogen test device, circulation pump, oil inlet pipe and oil outlet pipe; The single hydrogen test device includes a plurality of oil inlet assemblies, the ends of the oil inlet assemblies include detection mounting parts, the detection mounting parts include three connection ends, one of which is connected to and identical to the single hydrogen test device, one of which is connected to the oil inlet pipe, one of which is used to connect to a hydrogen sensor, and the detection end of the hydrogen sensor is deeply inside the detection mounting part; The bottom of the single hydrogen test device is connected to a circulation pump through an oil outlet pipe, and the circulation pump is connected to the detection installation part of the single hydrogen test device through an oil inlet pipe to form a circulation; Transformer oil is stored in the single hydrogen test device.

2. The calibration platform of a hydrogen online monitoring device according to claim 1, characterized in that: The single hydrogen test device comprises an oil pillow and a tank body; the oil pillow is connected to the tank body and communicated with the tank body; the oil inlet assembly is connected to the tank body, and the oil outlet pipe is connected to the tank body.

3. The calibration platform of a hydrogen online monitoring device according to claim 2, characterized in that: The oil pillow includes an oil pillow tube, a liquid level gauge, a breather, and a second ball valve. The oil pillow tube is connected to the top surface of the tank body through a bracket, the end of the oil pillow tube is connected to the liquid level gauge, the breather is connected to the top of the oil pillow tube through a bent pipe, and the second ball valve is connected to the bottom oil outlet of the oil pillow tube.

4. The calibration platform of a hydrogen online monitoring device according to claim 2, characterized in that: The oil inlet assembly comprises an oil inlet flange and a first ball valve. The oil inlet flange is connected to the tank body. One end of the first ball valve is connected to the oil inlet flange, and the other end of the first ball valve is connected to the detection mounting component.

5. The calibration platform of a hydrogen online monitoring device according to claim 2, characterized in that: The outside of the tank body is connected to a heating plate, and the top of the tank body is connected to a temperature sensor.

6. The calibration platform of a hydrogen online monitoring device according to claim 1, characterized in that: It also includes a buffer tank, the bottom of which is connected to the circulating pump, the buffer tank includes a plurality of outlets, and the oil inlet pipe is connected to the outlet of the buffer tank.

7. The calibration platform of a hydrogen online monitoring device according to claim 1, characterized in that: It also includes a movable chassis, and the single hydrogen test device and the circulation pump are installed on the movable chassis.

8. The calibration platform of a hydrogen online monitoring device according to claim 1, characterized in that: The device also includes a controller, which is connected to the circulation pump and the hydrogen sensor.

9. A method for calibrating a hydrogen online monitoring device, characterized in that: A verification platform for a hydrogen online monitoring device according to any one of claims 1 to 8 comprises the following steps: Move the calibration platform of the hydrogen online monitoring device to the place where the equipment to be tested is used, remove the hydrogen sensor of the equipment to be tested and connect it to the connecting end of the detection mounting piece; The single hydrogen test device is filled with transformer oil, and the circulation pump is started. The transformer oil enters the circulation pump through the oil outlet pipe, then enters the detection installation through the oil inlet pipe, and finally circulates into the single hydrogen test device. When the transformer oil passes through the detection installation, it fully contacts the hydrogen sensor installed on the detection installation to calibrate the hydrogen sensor.

10. A method for calibrating a hydrogen online monitoring device, characterized in that: The single hydrogen test device comprises an oil pillow and a tank body. The outer wall of the tank body is connected to a heating plate, and the heating plate is connected to a controller. The oil temperature in the tank body is controlled by the heating plate, and the hydrogen content is detected at different oil temperatures.

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