SF6 / n2 mixed gas intelligent on-line monitoring device

Abstract

The utility model provides a kind of SF6 / N2 mixed gas intelligent on-line monitoring device, it is related to gas monitoring technical field, including processing box, infrared spectrum sensor is fixedly installed in the inside one side of processing box, information processing module for processing information is fixedly installed in the inside one side of processing box, ultrasonic sensor is fixedly installed in the inside one side of processing box, pressure temperature sensor is fixedly installed in the inside one side of processing box, the top surface of processing box is fixedly installed with several alarm lamps, filter screen one, driving motor, cam, connecting roller, gyro wheel, gyro wheel, mounting rod, spring and filter screen one are cooperated with each other by being set, it can prevent dust from contacting multiple sensors such as pressure temperature sensor, ultrasonic sensor and infrared spectrum sensor while preventing air intake fluctuation from affecting mixed gas detection, reach the filtering effect to dust, improve the monitoring effect to SF / N mixed gas.

Description

Technical Field

[0001] This utility model relates to the field of gas monitoring technology, and in particular to an intelligent online monitoring device for SF6 / N2 mixed gas. Background Technology

[0002] Sulfur hexafluoride (SF6) is widely used in high-voltage electrical equipment (such as gas-insulated switchgear and circuit breakers) due to its excellent insulation and arc-quenching properties. However, SF6 is a potent greenhouse gas, with a global warming potential (GWP) 23,500 times that of CO2. To reduce SF6 emissions, the power industry is gradually adopting SF6 / N2 mixtures as an alternative, with SF6 typically comprising 20%–50% and N2 acting as a buffer gas to reduce environmental impact. In practical applications, monitoring of both SF6 and N2 is necessary.

[0003] Research revealed problems with existing technologies for monitoring mixed gases. Traditional monitoring techniques suffer from issues such as relying on pressure / temperature to convert density, failing to distinguish between changes in the mixture ratio and leaks. SF6 leaks and N2 leaks exhibit similar characteristics, resulting in poor monitoring effectiveness for mixed gases. Therefore, it is necessary to provide a new intelligent online monitoring device for SF6 / N2 mixed gases to address these technical problems. Utility Model Content

[0004] The technical problem solved by this utility model is to provide an intelligent online monitoring device for SF6 / N2 mixed gas.

[0005] To solve the above-mentioned technical problems, this utility model provides an intelligent online monitoring device for SF6 / N2 mixed gas, comprising: a processing box, wherein an infrared spectral sensor is fixedly installed on one side of the processing box, an information processing module for processing information is fixedly installed on one side of the processing box, an ultrasonic sensor is fixedly installed on one side of the processing box, a pressure-temperature sensor is fixedly installed on one side of the processing box, and a plurality of alarm lights are fixedly installed on the top surface of the processing box; and a dust filtration mechanism, wherein the dust filtration mechanism is disposed inside the processing box for filtering dust in the mixed gas.

[0006] Preferably, a simulated dial is fixedly installed on the top surface of the processing box, and a display screen is fixedly installed on the top surface of the processing box.

[0007] Preferably, the dust filtration structure includes a filter screen, which is slidably connected inside the processing box. Two cams are disposed inside the processing box, and a connecting roller is fixedly installed between the two cams. A drive motor for driving the cams to rotate is installed on the top surface of the processing box. Connecting blocks are fixedly installed on both the top and bottom surfaces inside the processing box. An mounting rod is slidably connected to the connecting block. One end of the mounting rod passes through the connecting block and is fixedly connected to one side of the filter screen. A support frame is fixedly installed on the other end of the mounting rod. A roller is rotatably connected inside the support frame, and a spring is sleeved on the outer circular wall of the mounting rod.

[0008] Preferably, the processing box has support grooves on both sides, the filter screen has sliding blocks fixedly installed on both sides, the support groove has a support rod fixedly installed inside, and the support rod and the sliding block are slidably connected.

[0009] Preferably, a support plate is fixedly installed inside the processing box, an air intake fan for air intake is rotatably connected to one side of the support plate, and a filter screen is fixedly installed on one side of the processing box.

[0010] Preferably, two fixing blocks are fixedly installed on both sides of the processing box, the top surface of the fixing blocks is provided with mounting holes, and a handle is fixedly installed on the top surface of the processing box.

[0011] Compared with related technologies, the intelligent online monitoring device for SF6 / N2 mixed gas provided by this utility model has the following beneficial effects: When the mixed gas enters the processing chamber, the filter screen can filter the dust in the mixed gas, reducing the contact between dust and the sensors. Through the cooperation of the filter screen, drive motor, cam, connecting roller, roller, mounting rod, spring, and filter screen, multiple sensors such as the pressure-temperature sensor, ultrasonic sensor, and infrared spectroscopy sensor are prevented from being contacted by dust, while also preventing fluctuations in the intake volume from affecting the mixed gas detection. This achieves a dust filtration effect and improves the monitoring effect of SF6 / N2 mixed gas. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the connection structure between the support plate and the intake fan of this utility model.

[0014] Figure 3 This is a schematic diagram of the connection structure between the filter screen and the treatment box of this utility model.

[0015] Figure 4 for Figure 3 A magnified schematic diagram of a portion of the structure of A in the diagram;

[0016] Figure 5 This is a schematic diagram of the connection structure between the filter screen and the treatment box of this utility model.

[0017] The diagram is labeled as follows: 1. Processing box; 2. Filter 1; 3. Simulation dial; 4. Display screen; 5. Handle; 6. Alarm light; 7. Fixing block; 8. Mounting hole; 9. Dust filtration mechanism; 10. Support groove; 11. Support rod; 12. Sliding block; 13. Drive motor; 14. Cam; 15. Support plate; 16. Intake fan; 17. Filter 2; 18. Pressure and temperature sensor; 19. Ultrasonic sensor; 20. Connecting block; 21. Mounting rod; 22. Spring; 23. Support frame; 24. Roller; 25. Connecting roller; 26. Infrared spectral sensor; 27. Information processing module. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please refer to the following: Figures 1-5 ,in, Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the support plate and the intake fan of this utility model. Figure 3 This is a schematic diagram of the connection structure between the filter screen and the treatment box of this utility model. Figure 4 for Figure 3 A magnified schematic diagram of a portion of the structure of A in the diagram; Figure 5 This is a schematic diagram of the connection structure between the filter screen 2 and the processing box of this utility model. An intelligent online monitoring device for SF6 / N2 mixed gas includes a processing box 1. An infrared spectral sensor 26 is fixedly installed on one side of the interior of the processing box 1. The infrared spectral sensor 26 analyzes the SF6 concentration by emitting infrared light of a specific wavelength and analyzing the absorption spectrum. An information processing module 27 for processing information is fixedly installed on one side of the interior of the processing box 1. An ultrasonic sensor 19 is fixedly installed on one side of the interior of the processing box 1. The significant difference in sound velocity between SF6 and N2 allows the ultrasonic sensor 19 to measure the sound velocity and infer the mixing ratio. A pressure-temperature sensor 18 is fixedly installed on one side of the interior of the processing box 1. The pressure-temperature sensor 18 is used for real-time density calculation compensation. Several alarm lights 6 are fixedly installed on the top surface of the processing box 1. The alarm lights 6 correspond to the pressure-temperature sensor 18, the ultrasonic sensor 19, and the infrared spectral sensor 26, respectively. The alarm lights 6, mounting holes 8, ultrasonic sensors 19, and infrared spectral sensors 26 are all electrically connected to the information processing module 27. A dust filtration mechanism 9 is located inside the processing box 1 and is used to filter dust in the mixed gas.

[0020] In the above method, the infrared spectral sensor 26 emits multi-wavelength infrared light to detect the characteristic absorption peak of SF6 at 10.6μm and the non-absorption band of the N2 reference channel. Next, the ultrasonic sensor 19 emits ultrasonic pulses to measure the speed of sound. At the same time, the pressure-temperature sensor 18 directly reads the pressure P and temperature T of the mixed gas. After obtaining the data, it will be transmitted to the information processing module 27. The information processing module 27 can analyze the information. At this time, temperature compensation needs to be paid attention to.

[0021] Temperature compensation: Sound velocity correction formula: c=√(γRT / M), where γ is the adiabatic index and M is the molar mass;

[0022] Specifically, this includes the following situations:

[0023] During normal monitoring, infrared measurement showed SF6 = 50% ΔA = ±0.3%, and ultrasonic measurement showed SF6 = 49% ΔB = ±0.8% → weighted output SF6 = 49.7%, density verification passed ρ_calc≈ρ_meas;

[0024] During rapid leakage: the density ρ continues to decrease, but the mixing ratio x remains stable → this is judged as a pure leakage rather than a proportional leakage, triggering a "density decrease alarm" to achieve intelligent online monitoring of SF6 / N2 mixed gas.

[0025] A simulation dial 3 is fixedly installed on the top surface of the processing box 1, and a display screen 4 is fixedly installed on the top surface of the processing box 1. Both the simulation dial 3 and the display screen 4 are electrically connected to the information processing module 27. The simulation dial 3 is used for traditional mechanical density / pressure display, and the display screen 4 is used for digital display of mixing ratio, density, temperature and alarm status.

[0026] In this method, the density / pressure of the gas inside the processing chamber 1 is displayed by a mechanical pointer on the simulation dial 3, which is suitable for the habitual observation of the staff. The display screen 4 can digitally display the mixing ratio, density, temperature and alarm status, which is more intuitive and clear.

[0027] The dust filtration mechanism 9 includes a filter screen 2, which is slidably connected inside the processing chamber 1. The filter screen 2 can filter dust in the gas. Two cams 14 are provided inside the processing chamber 1, and a connecting roller 25 is fixedly installed between the two cams 14. The lower cam 14 is rotatably connected to the bottom surface of the processing chamber 1 via a bearing. A drive motor 13 for driving the cam 14 to rotate is installed on the top surface of the processing chamber 1. The drive shaft of the drive motor 13 passes through the processing chamber 1 and is fixedly connected to the top surface of the upper cam 14. Both the inner bottom and the inner bottom are fixedly installed with connecting blocks 20. A mounting rod 21 is slidably connected to the connecting block 20. One end of the mounting rod 21 passes through the connecting block 20 and is fixedly connected to one side of the filter screen 2. A support frame 23 is fixedly installed at the other end of the mounting rod 21. A roller 24 is rotatably connected inside the support frame 23 through a rotating shaft. A spring 22 is sleeved on the outer circular wall of the mounting rod 21. The spring 22 can provide a restoring force for the support frame 23. One end of the spring 22 is fixedly connected to one side of the connecting block 20, and the other end of the spring 22 is fixedly connected to one side of the support frame 23.

[0028] Among them, filter screen 2 can filter dust in the gas. After long-term use, filter screen 2 may be clogged with dust, resulting in a reduction in the gas intake. At this time, drive motor 13 drives cam 14 to rotate. The rotation of cam 14, through the cooperation of support frame 23, spring 22, roller 24 and mounting rod 21, makes filter screen 2 swing back and forth, cleaning the dust on filter screen 2, preventing dust from affecting pressure and temperature sensor 18, ultrasonic sensor 19 and infrared spectral sensor 26, and improving the monitoring accuracy of mixed gas.

[0029] In this method, when the mixed gas enters the processing box 1, the filter screen 2 can filter the dust in the mixed gas, reducing the contact between the dust and the sensor. After long-term use, the staff can start the drive motor 13. The drive shaft of the drive motor 13 rotates, which drives the cam 14 to rotate. The rotation of the cam 14 will also drive another cam 14 to rotate through the connecting roller 25.

[0030] When the tip of cam 14 rotates to contact roller 24, roller 24 and mounting rod 21 on support frame 23 move outward, simultaneously compressing spring 22. Mounting rod 21 moves outward on connecting block 20, causing filter screen 2 to move outward. When the round end of cam 14 rotates to contact roller 24, the force of spring 22 causes mounting rod 21 to move filter screen 2 inward. This causes filter screen 2 to move back and forth, causing dust on filter screen 2 to fall off, preventing dust on filter screen 2 from affecting the intake of mixed gas and reducing changes in the intake volume of mixed gas. While preventing dust from contacting multiple sensors such as pressure and temperature sensor 18, ultrasonic sensor 19, and infrared spectroscopy sensor 26, it also prevents fluctuations in intake volume from affecting the detection of mixed gas, achieving a dust filtration effect and improving the monitoring effect of SF6 / N2 mixed gas.

[0031] The processing box 1 has support grooves 10 on both sides inside, and sliding blocks 12 are fixedly installed on both sides of the filter screen 2. Support rods 11 are fixedly installed inside the support grooves 10. The support rods 11 and sliding blocks 12 are slidably connected. The support grooves 10, support rods 11 and sliding blocks 12 cooperate with each other to restrict the movement of the filter screen 2.

[0032] In this method, the filter screen 2 is set up. The movement of the filter screen 2 will drive the sliding block 12 to move along the support rod 11 inside the support groove 10 inside the processing box 1. The support groove 10, the support rod 11 and the sliding block 12 can restrict the movement of the filter screen 2 and improve the stability of the filter screen 2 when it moves.

[0033] A support plate 15 is fixedly installed inside the processing box 1. An air intake fan 16 for air intake is rotatably connected to one side of the support plate 15. The air intake fan 16 is electrically connected to the information processing module 27. The mixed gas can be allowed to enter the interior of the processing box 1 by rotating the air intake fan 16. A filter screen 17 is fixedly installed on one side of the processing box 1.

[0034] In this method, the intake fan 16 is set up so that the mixed gas enters the interior of the processing box 1 through the filter screen 2 and is discharged through the filter screen 17, thereby achieving the intake effect of the processing box 1.

[0035] Two fixing blocks 7 are fixedly installed on both sides of the processing box 1. The top surface of the fixing block 7 is provided with mounting holes 8, and a handle 5 is fixedly installed on the top surface of the processing box 1.

[0036] In this method, by using the fixed block 7, the operator inserts bolts into the mounting holes 8 on the fixed block 7, thereby fixing the processing box 1 in the appropriate position.

[0037] The working principle of the intelligent online monitoring device for SF6 / N2 mixed gas provided by this utility model is as follows: The mixed gas enters the processing box 1 through the intake fan 16. The intake fan 16 is controlled by the information processing module 27 to ensure that the gas can smoothly enter the processing box 1. The gas first enters the filter screen 2, which filters the dust in the gas, reducing the contact between dust and the sensor and preventing dust from affecting the normal operation of the sensor.

[0038] After long-term use, filter screen 2 may be clogged with dust, resulting in a reduction in gas intake. At this time, start drive motor 13. The drive shaft of drive motor 13 rotates, which drives cam 14 to rotate. The rotation of cam 14 causes filter screen 2 to move back and forth, causing the dust on filter screen 2 to fall off, preventing the dust on filter screen 2 from affecting the intake of mixed gas and reducing the impact of intake fluctuations on mixed gas detection.

[0039] Infrared spectroscopy sensor 26 emits multi-wavelength infrared light to detect the characteristic absorption peak of SF6 (10.6 μm) and the non-absorption band of the N2 reference channel. The SF6 concentration is analyzed through absorption spectroscopy. Ultrasonic sensor 19 emits ultrasonic pulses to measure the velocity of sound. Since the velocity of sound differs significantly between SF6 and N2, the mixing ratio can be inferred by measuring the velocity of sound. Pressure-temperature sensor 18 directly reads the pressure P and temperature T of the mixed gas, providing real-time compensation for density calculation. Data detected by infrared spectroscopy sensor 26, ultrasonic sensor 19, and pressure-temperature sensor 18 are transmitted to information processing module 27.

[0040] The information processing module 27 analyzes the data and calculates the concentration and mixing ratio of SF6;

[0041] The simulation dial 3 is used for traditional mechanical density / pressure display, adapting to the habitual observation of the staff. The mixing ratio, density, temperature and alarm status are displayed on the display screen 4.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An intelligent online monitoring device for SF6 / N2 mixed gas, characterized in that, include: The processing box (1) has an infrared spectral sensor (26) fixedly installed on one side inside the processing box (1), an information processing module (27) for processing information fixedly installed on one side inside the processing box (1), an ultrasonic sensor (19) fixedly installed on one side inside the processing box (1), a pressure and temperature sensor (18) fixedly installed on one side inside the processing box (1), and several alarm lights (6) fixedly installed on the top surface of the processing box (1). A dust filtration mechanism (9) is disposed inside the processing box (1) and is used to filter dust in the mixed gas.

2. The intelligent online monitoring device for SF6 / N2 mixed gas according to claim 1, characterized in that, The top surface of the processing box (1) is fixedly equipped with a simulated dial (3) and a display screen (4).

3. The intelligent online monitoring device for SF6 / N2 mixed gas according to claim 2, characterized in that, The dust filtration mechanism (9) includes a filter screen (2), which is slidably connected inside the processing box (1). The processing box (1) has two cams (14) inside, and a connecting roller (25) is fixedly installed between the two cams (14). A drive motor (13) for driving the cams (14) to rotate is installed on the top surface of the processing box (1). A connecting block (20) is fixedly installed on both the top and bottom surfaces inside the processing box (1). An installation rod (21) is slidably connected to the connecting block (20). One end of the installation rod (21) passes through the connecting block (20) and is fixedly connected to one side of the filter screen (2). A support frame (23) is fixedly installed on the other end of the installation rod (21). A roller (24) is rotatably connected inside the support frame (23). A spring (22) is sleeved on the outer circular wall of the installation rod (21).

4. The intelligent online monitoring device for SF6 / N2 mixed gas according to claim 3, characterized in that, The processing box (1) has support grooves (10) on both sides inside. The filter screen (2) has sliding blocks (12) fixedly installed on both sides. The support rod (11) is fixedly installed inside the support groove (10). The support rod (11) and the sliding block (12) are slidably connected.

5. The intelligent online monitoring device for SF6 / N2 mixed gas according to claim 1, characterized in that, A support plate (15) is fixedly installed inside the processing box (1). An air intake fan (16) for air intake is rotatably connected to one side of the support plate (15). A filter screen (17) is fixedly installed on one side of the processing box (1).

6. The intelligent online monitoring device for SF6 / N2 mixed gas according to claim 1, characterized in that, Two fixing blocks (7) are fixedly installed on both sides of the processing box (1). The top surface of the fixing block (7) is provided with a mounting hole (8). A handle (5) is fixedly installed on the top surface of the processing box (1).

Images