A multi-component SF6 decomposition product measuring device and method based on adaptive oxygen supplement

Abstract

The present application belongs to the technical field of decomposition product measurement, and discloses a multi-component SF6 decomposition product measuring device and method based on adaptive oxygen supplement, which comprises an SF6 decomposition product gas tank, the top end of the SF6 decomposition product gas tank is communicated with an SF6 decomposition product conveying pipe, and the output end of the corrugated pipe is communicated with a measurer. The present application also provides a multi-component SF6 decomposition product measuring method based on adaptive oxygen supplement, which comprises the following steps: S1, system power-on, the pressure value inside the filter box is monitored in real time through a pressure sensor. The present application cooperates the structures of the filter box, the gas conveying groove and the flow guide plate, so that the device can sufficiently filter and pretreat the gas during the SF6 decomposition product detection process. The whole filtering process realizes the seamless connection of gas pretreatment and detection, removes the interference of impurities and moisture on the electrochemical sensor, guarantees the accuracy of the detection data and the long-term stability of the sensor, and finally achieves the effects of improving the SF6 decomposition product detection precision and prolonging the service life of the sensor.

Description

Technical Field

[0001] This invention belongs to the field of decomposition product measurement technology, specifically a multi-component SF6 decomposition product measurement device and method based on adaptive oxygen supplementation. Background Technology

[0002] Sulfur hexafluoride (SF6) gas is widely used in high-voltage electrical equipment due to its excellent insulation and arc-quenching properties. When partial discharge or overheating faults occur during equipment operation, SF6 decomposes to produce decomposition products such as SO2, H2S, and CO. Detecting the composition and content of these products is a key means to diagnose equipment hazards and ensure the safe operation of the power system. Currently, the detection of SF6 decomposition products mainly adopts the electrochemical sensor method. This method utilizes the electrolyte inside the electrochemical sensor to react chemically with the gas being measured, converting the gas concentration into an electrical signal to achieve quantitative detection of decomposition products. It has the advantages of simple operation, short detection cycle, and high sensitivity, and is suitable for convenient on-site detection and long-term online monitoring.

[0003] Publication No. CN105259212B discloses a method for eliminating cross-interference in the detection of SF6 decomposition products, comprising the following steps: Step 1, constructing an SF6 decomposition product detection system architecture; Step 2, establishing an interference model of H2 gas on CO and SO2 sensors, introducing H2 samples with different H2 concentrations and SF6 as the base gas into the detection gas path, and solving for the interference function; Step 3, establishing a relationship model between the CO concentration value NCO and the voltage value VCO measured by the CO sensor, introducing CO samples with different CO concentrations and SF6 as the base gas into the detection gas path, and calculating the actual concentration N'CO; Step 4, establishing a relationship model between the SO2 concentration value NSO2 and the voltage value VSO2 measured by the SO2 sensor, introducing SO2 samples with different SO2 concentrations and SF6 as the base gas into the detection gas path, and calculating the actual concentration N'SO2. This invention can calculate and detect the most accurate CO and SO2 concentration values ​​when detecting samples of SF6 electrical equipment at the testing site.

[0004] This device can calculate the most accurate CO and SO2 concentration values ​​by establishing a cross-interference elimination model, thus solving the signal crosstalk problem between different sensors. However, it cannot solve the core problem of the continuous consumption of trace oxygen in the electrolyte during long-term operation of electrochemical sensors, which leads to the disruption of reaction equilibrium, increased measurement deviation, and shortened sensor life. Therefore, a multi-component SF6 decomposition product measurement device and method based on adaptive oxygen supplementation is proposed. This device can continuously supplement oxygen during the detection process to maintain the reaction equilibrium of the electrochemical sensor, ensuring long-term measurement stability. Furthermore, the gear and rope structure enables rapid replacement of filter components, reducing maintenance costs. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a multi-component SF6 decomposition product measurement device and method based on adaptive oxygen supplementation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation, comprising an SF6 decomposition product gas cylinder, an SF6 decomposition product delivery pipe connected to the top of the SF6 decomposition product gas cylinder, a first compressor connected to the input end of the SF6 decomposition product delivery pipe, a three-way connector connected to the output end of the SF6 decomposition product delivery pipe, an oxygen delivery pipe connected to one end of the three-way connector, an oxygen cylinder connected to one end of the oxygen delivery pipe, a second compressor connected to the input end of the oxygen delivery pipe, a filter mechanism connected to one end of the three-way connector, a replacement mechanism installed inside the filter mechanism, a bellows provided at one end of the filter mechanism, and a measuring device connected to the output end of the bellows.

[0007] The filtration mechanism includes a filter box, an air delivery channel, and a guide plate. The filter box is fixed to the output end of the three-way connector, the air delivery channel is opened inside the filter box, and the guide plate is fixed inside the air delivery channel.

[0008] The replacement mechanism includes a filter block, a filter screen, and a sealing ring. The filter block is slidably connected to one end of the filter box, the filter screen is fixed inside the filter block, and the sealing ring is fixed outside the filter block.

[0009] Preferably, a heating ring is fixed to the outside of the filter box, a pressure sensor is fixed to one end of the filter box, and an air outlet is fixed to one end of the filter box.

[0010] Preferably, the input end of the gas delivery channel is connected to the tee connector, the output end of the gas delivery channel is connected to the gas outlet, and several groups of guide plates are provided, which are distributed in an array.

[0011] Preferably, the filter box is door-shaped, four sets of pressure sensors are provided, the pressure sensors are symmetrically distributed, and two sets of heating rings are provided.

[0012] Preferably, one end of the filter block is fixed with an insert block, a pressure block is slidably connected inside the filter block, a drive rod is fixed to one end of the pressure block, a transmission gear is rotatably connected inside the filter block, a transmission rod is fixed to one end of the transmission gear, a pull rope is wound around the outside of the transmission rod, a first limiting block is fixed to one end of the pull rope, a second limiting block is fixed to the other end of the pull rope, and a return spring is fixed to the bottom end of the first limiting block.

[0013] Preferably, the filter blocks are provided in two sets, and the filter blocks are symmetrically distributed about the central axis of the filter box. The filter screen is in an array honeycomb pattern, and the sealing rings are provided in three sets, and the sealing rings are in an array.

[0014] Preferably, the inserts are provided in two sets, and the inserts are symmetrically distributed about the central axis of the filter block, and the inserts are inserted into the filter box.

[0015] Preferably, the drive rod and the transmission gear are meshed together, the transmission rod is rotatably connected inside the insert block, the first limiting block and the filter box are inserted into each other, and the first limiting block and the insert block are slidably connected.

[0016] Preferably, the first limiting block and the second limiting block are symmetrically distributed about the central axis of the transmission rod, and two sets of the return spring are provided. The bottom end of the return spring is fixedly connected to the second limiting block, and the return spring is used to press the first limiting block and the second limiting block.

[0017] This invention also provides a method for measuring multi-component SF6 decomposition products based on adaptive oxygen supplementation, comprising the following steps:

[0018] S1. When the system is powered on, the pressure sensor monitors the pressure inside the filter box in real time. When the pressure is lower than the preset lower pressure threshold, the second compressor is started to compress outside air and inject it into the oxygen tank. When the pressure reaches the preset upper pressure threshold, the second compressor stops automatically, so that the oxygen tank is filled with sufficient constant pressure oxygen reference gas, and the system enters the quasi-measurement state.

[0019] S2. Start the first compressor to deliver the gas in the SF6 decomposition product tank to the three-way connector through the SF6 decomposition product delivery pipe. At the same time, the second compressor drives the gas in the oxygen tank to be delivered to the three-way connector through the oxygen delivery pipe according to the preset ratio. The two gases merge at the three-way connector to form a mixed gas. During this process, the pressure sensor continuously monitors the pressure value. When the pressure is lower than the threshold, the second compressor automatically starts to replenish the pressure to ensure the stable and continuous delivery of the mixed gas.

[0020] S3. After the mixed gas enters the filter box through the three-way connector, it is transported through the gas delivery channel. At this time, the guide plate can guide the mixed gas and prolong its stay in the filter box. At the same time, the heating ring is activated to heat the mixed gas and keep it at the optimal test temperature. When the mixed gas moves in the gas delivery channel, it passes through two filter screens for double filtration. The filtered mixed gas is transported through the gas outlet to the inside of the bellows and then enters the measuring instrument for detection.

[0021] S4. After the measuring instrument completes the detection, it outputs the apparent concentration value and simultaneously acquires the total flow rate and reference gas flow rate in real time. It calculates the true concentration value of the decomposition products in the original gas according to the back-calculation formula and outputs and displays it. The back-calculation formula is: True concentration value = Apparent concentration value × Total flow rate / (Total flow rate - Reference gas flow rate).

[0022] S5. When the device needs maintenance, press the two sets of pressure blocks to make the pressure blocks move down, which in turn moves the drive rod down and drives the transmission gear to rotate. After the transmission gear drives the transmission rod to rotate, the transmission rod winds up the pull rope, thereby pulling the first limit block and the second limit block inward to disengage them from the filter box. At this time, the filter block can be pulled out to clean or replace the filter block and filter screen.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] This invention, through the coordinated design of a filter box, gas delivery channel, and guide plate, enables the device to fully filter and pre-treat the gas during SF6 decomposition product detection. The mixed gas to be tested enters the filter box via the gas delivery channel, and the guide plate guides the airflow evenly through the filter structure, effectively intercepting moisture and impurities in the gas. A heating ring heats the gas inside the filter box, reducing humidity and preventing water vapor condensation on the sensor surface, which could cause measurement errors. A pressure sensor continuously monitors changes in the internal pressure of the filter box, issuing a timely warning signal when the filter structure becomes clogged, causing an abnormal increase in pressure. The filtered clean gas is discharged from the outlet and delivered to the measuring instrument for component analysis. The entire filtration process achieves seamless integration of gas pre-treatment and detection, removing interference from impurities and moisture on the electrochemical sensor, ensuring the accuracy of the detection data and the long-term stability of the sensor, ultimately improving the accuracy of SF6 decomposition product detection and extending the sensor's lifespan.

[0025] This invention, through the coordinated structure of filter blocks, filter screens, and sealing rings, enables the rapid disassembly and replacement of filter blocks when the filter screen becomes clogged or reaches the end of its service life. Replacement is achieved simply by pressing the pressure block, causing the drive rod to move downwards. The drive rod, via a transmission gear, rotates the transmission rod, which then retracts the pull rope, causing the first and second limit blocks to retract towards the center against the spring force of the return spring. At this point, the insert block disengages from the slot in the filter box, the sealing ring breaks its seal, and the filter block, along with the internal filter screen, can be pulled out for replacement. After replacement, releasing the pressure block causes the return spring to push the first and second limit blocks back into their slots. The entire replacement process requires no tools and can be completed with just one hand, reducing on-site maintenance difficulty, shortening maintenance time, and ultimately achieving the effects of reducing operating costs and improving equipment availability. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall rear view structure of the present invention;

[0028] Figure 3 This is a schematic cross-sectional view of the filtration mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged cross-sectional view of point A in the middle section;

[0030] Figure 5 This is a schematic diagram of the replacement mechanism structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the replacement mechanism of the present invention in its disassembly and assembly states;

[0032] Figure 7 This is a schematic cross-sectional view of the replacement mechanism of the present invention;

[0033] Figure 8 For the present invention Figure 7 Enlarged cross-sectional view of section B in the middle.

[0034] In the diagram: 1. SF6 decomposed product gas cylinder; 2. SF6 decomposed product delivery pipe; 3. First compressor; 4. T-joint; 5. Oxygen delivery pipe; 6. Oxygen cylinder; 7. Second compressor; 8. Filtration mechanism; 801. Filter box; 802. Gas delivery trough; 803. Guide plate; 804. Heating ring; 805. Pressure sensor; 806. Gas outlet; 9. Replacement mechanism; 901. Filter block; 902. Filter screen; 903. Sealing ring; 904. Insert block; 905. Pressure block; 906. Drive rod; 907. Transmission gear; 908. Transmission rod; 909. Pull rope; 910. First limit block; 911. Return spring; 912. Second limit block; 10. Bellows; 11. Measuring device. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 8As shown, the present invention provides a multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation, including an SF6 decomposition product gas tank 1, an SF6 decomposition product delivery pipe 2 connected to the top of the SF6 decomposition product gas tank 1, a first compressor 3 connected to the input end of the SF6 decomposition product delivery pipe 2, a three-way connector 4 connected to the output end of the SF6 decomposition product delivery pipe 2, an oxygen delivery pipe 5 connected to one end of the three-way connector 4, an oxygen tank 6 connected to one end of the oxygen delivery pipe 5, a second compressor 7 connected to the input end of the oxygen delivery pipe 5, a filter mechanism 8 connected to one end of the three-way connector 4, a replacement mechanism 9 installed inside the filter mechanism 8, a bellows 10 provided at one end of the filter mechanism 8, and a measuring device 11 connected to the output end of the bellows 10.

[0037] like Figures 1 to 6 As shown, the filtration mechanism 8 includes a filter box 801, an air supply channel 802, and a guide plate 803. The filter box 801 is fixed to the output end of the three-way connector 4. The air supply channel 802 is opened inside the filter box 801. The guide plate 803 is fixed inside the air supply channel 802. A heating ring 804 is fixed to the outside of the filter box 801. A pressure sensor 805 is fixed to one end of the filter box 801. An air outlet 806 is fixed to one end of the filter box 801. The input end of the air supply channel 802 is connected to the three-way connector 4. The output end of the air supply channel 802 is connected to the air outlet 806. Several sets of guide plates 803 are arranged in an array. The filter box 801 is door-shaped. Four sets of pressure sensors 805 are arranged symmetrically. Two sets of heating rings 804 are arranged.

[0038] The above scheme employs the following method: By designing the filter box 801 as a door-shaped structure, the mixed gas can flow fully through the internal filtration area along the door-frame shaped path. The gas delivery channel 802 is located inside the filter box 801, with its inlet end connected to the three-way connector 4 and its outlet end connected to the outlet 806. This allows the mixed gas to enter through the three-way connector 4 and move along the channel of the gas delivery channel 802 towards the outlet 806. Multiple sets of guide plates 803 are arranged in an array inside the gas delivery channel 802. When the mixed gas flows within the gas delivery channel 802, the guide plates 803 repeatedly deflect and guide the airflow, extending the residence time of the gas inside the filter box 801, ensuring that impurities and moisture in the gas fully contact the filtration structure. Two sets of heating rings 804 are provided and fixed to the outside of the filter box 801. During gas flow... During the process, the inside of the filter box 801 is uniformly heated to reduce gas humidity and maintain the gas within the optimal detection temperature range. Four pressure sensors 805 are set and symmetrically distributed at one end of the filter box 801 to monitor the gas pressure at different locations inside the filter box 801. When a local blockage occurs in the filter structure, the pressure sensor 805 in the corresponding area can promptly report abnormal pressure changes. The mixed gas after filtration and heating is output from the outlet 806 and enters the bellows 10, and is finally delivered to the measuring instrument 11 for component detection. The entire filtration process achieves thorough removal of impurities and moisture from the gas, avoiding the interference of impurity deposition on the sensor surface and moisture condensation on the measurement accuracy, ensuring the accuracy of the detection data and the long-term stable operation of the electrochemical sensor.

[0039] like Figures 1 to 8As shown, the replacement mechanism 9 includes a filter block 901, a filter screen 902, and a sealing ring 903. The filter block 901 is slidably connected to one end of the filter box 801. The filter screen 902 is fixed inside the filter block 901. The sealing ring 903 is fixed to the outside of the filter block 901. An insert block 904 is fixed to one end of the filter block 901. A pressure block 905 is slidably connected inside the filter block 901. A drive rod 906 is fixed to one end of the pressure block 905. A transmission gear 907 is rotatably connected inside the filter block 901. A transmission rod 908 is fixed to one end of the transmission gear 907. A pull rope 909 is wound around the outside of the transmission rod 908. A first limit block 910 is fixed to one end of the pull rope 909. A second limit block 912 is fixed to the other end of the pull rope 909. A return spring 911 is fixed to the bottom end of the first limit block 910. Two sets of filter blocks 901 are provided. The filter blocks 901 are symmetrically distributed about the central axis of the filter box 801. The filter screen 902 is in an array honeycomb pattern. Three sets of sealing rings 903 are arranged in an array. Two sets of insert blocks 904 are arranged. The insert blocks 904 are symmetrically distributed about the central axis of the filter block 901. The insert blocks 904 are inserted into the filter box 801. The drive rod 906 and the transmission gear 907 are meshed and connected. The transmission rod 908 is rotatably connected inside the insert block 904. The first limiting block 910 is inserted into the filter box 801. The first limiting block 910 and the insert block 904 are slidably connected. The first limiting block 910 and the second limiting block 912 are symmetrically distributed about the central axis of the transmission rod 908. Two sets of return springs 911 are arranged. The bottom end of the return spring 911 is fixedly connected to the second limiting block 912. The return spring 911 is used to press the first limiting block 910 and the second limiting block 912.

[0040] The above scheme employs the following method: two sets of filter blocks 901 are symmetrically distributed about the central axis of the filter box 801 and slidably connected to one end of the filter box 801, allowing both sets of filter blocks 901 to simultaneously perform gas filtration. The filter screen 902 is an array of honeycomb and fixed inside the filter blocks 901, increasing the contact area between the gas and the filter material and improving filtration efficiency. Three sets of sealing rings 903 are arranged in an array and fixed to the outside of the filter blocks 901 to ensure the sealing of the connection between the filter blocks 901 and the filter box 801. Two sets of insert blocks 904 are provided. The filter blocks 901 are symmetrically distributed about their central axis. Insert blocks 904 are inserted into the filter box 801, achieving a positioning connection between the filter blocks 901 and the filter box 801. When the filter screen 902 needs to be replaced, press the pressure block 905 to make it slide downwards inside the filter block 901. The pressure block 905 drives the drive rod 906 to move downwards synchronously. The drive rod 906 engages with the transmission gear 907. The downward movement of the drive rod 906 drives the transmission gear 907 to rotate, which in turn drives the transmission rod 908 to rotate. The transmission rod 908 then retracts the external pull rope 909. The pull rope 909 has a first limiting block 910 and a second limiting block 912 fixed at both ends. The first limiting block 910 and the second limiting block 912 are symmetrically distributed about the central axis of the transmission rod 908. The winding of the pull rope 909 pulls the first limiting block 910 and the second limiting block 912 inward, so that they overcome the elastic force of the return spring 911 and disengage from the plug-in connection with the filter box 801. At this time, the constraint of the filter block 901 is released, and the filter block 901 can be pulled out of the filter box 801 by pulling it outward, so that the internal filter screen 902 can be cleaned or replaced. After replacement, push the filter block 901 back into the filter box 801, align the insert block 904 with the slot of the filter box 801 and insert it into place. Release the pressure block 905, and the reset spring 911 will restore its deformation, pushing the first limit block 910 and the second limit block 912 outward and reinserting them into the limit hole of the filter box 801, thus achieving automatic locking of the filter block 901. The entire replacement process does not require external tools; the locking and unlocking can be switched by pressing the pressure block 905. The operation is convenient and the positioning is accurate, effectively shortening the on-site maintenance time.

[0041] This invention also provides a method for measuring multi-component SF6 decomposition products based on adaptive oxygen supplementation, comprising the following steps:

[0042] S1. When the system is powered on, the pressure sensor 805 monitors the pressure value inside the filter box 801 in real time. When the pressure value is lower than the preset lower pressure threshold, the second compressor 7 is started to compress outside air and inject it into the oxygen tank 6. When the pressure value reaches the preset upper pressure threshold, the second compressor 7 automatically stops, so that the oxygen tank 6 stores sufficient constant pressure oxygen reference gas, and the system enters the quasi-measurement state.

[0043] S2. Start the first compressor 3 to transport the gas in the SF6 decomposition product tank 1 to the three-way connector 4 through the SF6 decomposition product delivery pipe 2. At the same time, the second compressor 7 drives the gas in the oxygen tank 6 to be delivered to the three-way connector 4 through the oxygen delivery pipe 5 according to the preset ratio. The two gases merge at the three-way connector 4 to form a mixed gas. During this process, the pressure sensor 805 continuously monitors the pressure value. When the pressure is lower than the threshold, the second compressor 7 automatically starts to replenish the pressure to ensure the stable and continuous delivery of the mixed gas.

[0044] S3. After the mixed gas enters the filter box 801 through the three-way connector 4, it is transported through the gas delivery channel 802. At this time, the guide plate 803 can guide the mixed gas and prolong its time in the filter box 801. At the same time, the heating ring 804 is activated to heat the mixed gas and keep it at the optimal test temperature. When the mixed gas moves in the gas delivery channel 802, it passes through the filter screen 902 twice for double filtration. The filtered mixed gas is transported to the bellows 10 through the gas outlet 806 and then enters the measuring instrument 11 for detection.

[0045] S4. After the measuring instrument 11 completes the detection, it outputs the apparent concentration value and simultaneously acquires the total flow rate value and the reference gas flow rate value in real time. It calculates the true concentration value of the decomposition products in the original gas according to the back-calculation formula and outputs and displays it. The back-calculation formula is: True concentration value = Apparent concentration value × Total flow rate value / (Total flow rate value - Reference gas flow rate value).

[0046] S5. When the device needs maintenance, by pressing the two sets of pressure blocks 905, the pressure blocks 905 move down, causing the drive rod 906 to move down, which in turn drives the transmission gear 907 to rotate. The transmission gear 907 drives the transmission rod 908 to rotate, and the transmission rod 908 winds up the pull rope 909, thereby pulling the first limit block 910 and the second limit block 912 inward, so that they are disconnected from the filter box 801. At this time, the filter block 901 can be pulled out to clean or replace the filter block 901 and the filter screen 902.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation, comprising an SF6 decomposition product gas tank (1), characterized in that: The top of the SF6 decomposed gas tank (1) is connected to an SF6 decomposed gas delivery pipe (2). The input end of the SF6 decomposed gas delivery pipe (2) is connected to a first compressor (3). The output end of the SF6 decomposed gas delivery pipe (2) is connected to a three-way connector (4). One end of the three-way connector (4) is connected to an oxygen delivery pipe (5). One end of the oxygen delivery pipe (5) is connected to an oxygen tank (6). The input end of the oxygen delivery pipe (5) is connected to a second compressor (7). One end of the three-way connector (4) is connected to a filter mechanism (8). A replacement mechanism (9) is installed inside the filter mechanism (8). A bellows (10) is provided at one end of the filter mechanism (8). The output end of the bellows (10) is connected to a measuring device (11). The filtration mechanism (8) includes a filter box (801), an air delivery channel (802), and a guide plate (803). The filter box (801) is fixed at the output end of the three-way connector (4). The air delivery channel (802) is opened inside the filter box (801). The guide plate (803) is fixed inside the air delivery channel (802). The replacement mechanism (9) includes a filter block (901), a filter screen (902), and a sealing ring (903). The filter block (901) is slidably connected to one end of the filter box (801), the filter screen (902) is fixed inside the filter block (901), and the sealing ring (903) is fixed outside the filter block (901).

2. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 1, characterized in that: A heating ring (804) is fixed to the outside of the filter box (801), a pressure sensor (805) is fixed to one end of the filter box (801), and an air outlet (806) is fixed to one end of the filter box (801).

3. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 2, characterized in that: The input end of the gas delivery channel (802) is connected to the three-way connector (4), the output end of the gas delivery channel (802) is connected to the air outlet (806), and several groups of guide plates (803) are provided, and the guide plates (803) are distributed in an array.

4. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 2, characterized in that: The filter box (801) is door-shaped, and there are four sets of pressure sensors (805) which are symmetrically distributed. There are two sets of heating rings (804).

5. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 1, characterized in that: One end of the filter block (901) is fixed with an insert block (904), and a pressure block (905) is slidably connected inside the filter block (901). One end of the pressure block (905) is fixed with a drive rod (906), and a transmission gear (907) is rotatably connected inside the filter block (901). One end of the transmission gear (907) is fixed with a transmission rod (908), and a pull rope (909) is wound around the outside of the transmission rod (908). One end of the pull rope (909) is fixed with a first limiting block (910), and the other end of the pull rope (909) is fixed with a second limiting block (912). A return spring (911) is fixed at the bottom end of the first limiting block (910).

6. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 1, characterized in that: Two sets of filter blocks (901) are provided, and the filter blocks (901) are symmetrically distributed about the central axis of the filter box (801). The filter screen (902) is an array honeycomb pattern. Three sets of sealing rings (903) are provided, and the sealing rings (903) are in an array pattern.

7. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 5, characterized in that: Two sets of inserts (904) are provided. The inserts (904) are symmetrically distributed about the central axis of the filter block (901). The inserts (904) and the filter box (801) are inserted into each other.

8. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 5, characterized in that: The drive rod (906) and the transmission gear (907) are meshed and connected. The transmission rod (908) is rotatably connected inside the insert (904). The first limiting block (910) and the filter box (801) are inserted and connected. The first limiting block (910) and the insert (904) are slidably connected.

9. The multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation according to claim 5, characterized in that: The first limiting block (910) and the second limiting block (912) are symmetrically distributed about the central axis of the transmission rod (908). Two sets of return springs (911) are provided. The bottom end of the return spring (911) is fixedly connected to the second limiting block (912). The return spring (911) is used to press the first limiting block (910) and the second limiting block (912).

10. A method for measuring multi-component SF6 decomposition products based on adaptive oxygen supplementation, employing a multi-component SF6 decomposition product measuring device based on adaptive oxygen supplementation as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. When the system is powered on, the pressure value inside the filter box (801) is monitored in real time by the pressure sensor (805). When the pressure value is lower than the preset lower pressure threshold, the second compressor (7) is started to compress the outside air and inject it into the oxygen tank (6). When the pressure value reaches the preset upper pressure threshold, the second compressor (7) automatically stops, so that the oxygen tank (6) is filled with sufficient constant pressure oxygen reference gas, and the system enters the quasi-measurement state. S2. Start the first compressor (3) to transport the gas in the SF6 decomposition gas tank (1) to the three-way connector (4) through the SF6 decomposition gas delivery pipe (2). At the same time, the second compressor (7) drives the gas in the oxygen tank (6) to be transported to the three-way connector (4) through the oxygen delivery pipe (5) according to the preset ratio. The two gas streams merge at the three-way connector (4) to form a mixed gas. During this process, the pressure sensor (805) continuously monitors the pressure value. When the pressure is lower than the threshold, the second compressor (7) automatically starts to replenish the pressure to ensure the stable and continuous delivery of the mixed gas. S3. The mixed gas enters the filter box (801) through the three-way connector (4) and is then transported through the gas delivery channel (802). At this time, the guide plate (803) can guide the mixed gas and prolong its time in the filter box (801). At the same time, the heating ring (804) is activated to heat the mixed gas and keep it at the optimal test temperature. When the mixed gas moves in the gas delivery channel (802), it passes through two filter screens (902) for double filtration. The filtered mixed gas is then transported through the outlet (806) to the inside of the bellows (10) and then enters the measuring instrument (11) for detection. S4. After the measuring instrument (11) completes the detection, it outputs the apparent concentration value and simultaneously acquires the total flow rate and the reference gas flow rate in real time. It calculates the true concentration value of the decomposed products in the original gas according to the back-calculation formula and outputs and displays it. The back-calculation formula is: True concentration value = Apparent concentration value × Total flow rate / (Total flow rate - Reference gas flow rate). S5. When the device needs maintenance, by pressing the two sets of pressure blocks (905), the pressure blocks (905) move down, causing the drive rod (906) to move down, which in turn drives the transmission gear (907) to rotate. After the transmission gear (907) drives the transmission rod (908) to rotate, the transmission rod (908) winds up the pull rope (909), thereby pulling the first limit block (910) and the second limit block (912) inward, so that they are disconnected from the filter box (801). At this time, the filter block (901) can be pulled out to clean or replace the filter block (901) and the filter screen (902).

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