Self-mixing gas explosion limit testing device

Abstract

This invention discloses a self-mixing gas explosion limit testing device, belonging to the technical field of gas explosion limit testing devices. The self-mixing gas explosion limit testing device includes a base, a mounting frame mounted on the base, an explosion chamber mounted on the mounting frame, an exhaust component mounted on the explosion chamber, an igniter mounted on the explosion chamber, an inlet component and a stirring component inside the explosion chamber, and an exhaust component below the base. The exhaust component includes a transmission component and an energy storage component. Simultaneously with the input of gas, the stirring component mixes the gas, improving mixing uniformity and speed. This stirring method achieves rapid gas homogenization without compromising sealing, improving mixing effect while preventing gas leakage and ensuring testing effectiveness. By combining the exhaust component and the energy storage component, the high-pressure gas generated during the explosion test is utilized to clean the explosion chamber, further improving testing effectiveness and resource utilization.

Description

Technical Field

[0001] This invention relates to the technical field of gas explosion limit testing devices, specifically a self-mixing gas explosion limit testing device. Background Technology

[0002] The gas explosion limit test device is a specialized explosion-proof testing equipment for determining the upper and lower explosion limits of mixtures of combustible gases, vapors, and air. During the test, the explosion chamber is first evacuated, and then the test medium and air are filled in according to the ratio. After stirring evenly, it is ignited. The pressure change determines whether an explosion occurs. By gradually adjusting the medium concentration, the upper and lower explosion limit thresholds for the corresponding operating conditions can be obtained. It is widely used in the fields of chemical industry, coal mining, and hydrogen energy for explosion risk assessment, process safety design, and explosion-proof equipment selection. It is the core testing carrier for the safe application of combustible media.

[0003] Under current technology, blade agitation may cause disturbances or sealing problems, which may lead to gas leakage and thus affect the quality of testing. After an explosion test, high-pressure gas often accumulates in the device. In addition to setting up pressure reducing devices to slowly discharge the high-pressure exhaust gas after the explosion, the cost of use is increased and the energy carried by the high-pressure gas itself is wasted. Summary of the Invention

[0004] The purpose of this invention is to provide a self-mixing gas explosion limit testing device to solve the problems of poor sealing, high cost of exhaust gas discharge, and energy waste in existing stirring devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: the self-mixing gas explosion limit testing device includes a base, a mounting frame is mounted on the base, an explosion chamber is mounted on the mounting frame, an exhaust component is mounted on the explosion chamber, an igniter is mounted on the explosion chamber, an air inlet component and a stirring component are provided inside the explosion chamber, and an exhaust component is provided below the base, the exhaust component including a transmission component and an energy storage component; The stirring component includes a mounting plate, a drive motor, mounting holes, a sealing plate, a driving rotor, a driven rotor, and a cage-shaped rotating component; A mounting plate is installed on the base, and a drive motor is mounted on the mounting plate. The explosion chamber has mounting holes, and a sealing plate is installed on the mounting holes. A driven rotor is installed on the mounting holes, and the driven rotor is located on the side of the sealing plate closer to the inside of the explosion chamber. An active rotor is installed at the output end of the drive motor, and the active rotor is located on the outside of the explosion chamber. The active rotor and the driven rotor are coaxially mounted. A cage-shaped rotating component is installed on the driven rotor, and the cage-shaped rotating component cooperates with the air intake component to mix the gas while it is being introduced.

[0006] This testing device is connected to an external control terminal during use to control its operation. The vacuum pump, drive motor, and igniter are all electrically connected to the control terminal. When an explosion limit test is required, the control terminal first controls the vacuum pump to evacuate the explosion chamber. Then, the control terminal's air intake device inputs mixed gas into the explosion chamber. At the same time as the gas is input, the control terminal starts the drive motor. The drive motor drives the active rotor to rotate. The active rotor and the driven rotor are magnetically coupled and have matched pole numbers. When the active rotor rotates, the alternating magnetic field generated by the sealing plate drives the driven rotor to rotate synchronously. The torque is transmitted entirely through magnetic force. When the driven rotor rotates, it drives the stirring device to mix the gas, improving the mixing uniformity and mixing speed. Through this stirring method, rapid homogenization of the gas can be achieved without damaging the seal, improving the mixing effect while avoiding gas leakage and ensuring the detection effect. By combining exhaust and energy storage components, the high-pressure gas generated during the explosion test is utilized to clean the explosion chamber, thereby improving both the test results and resource utilization.

[0007] As a preferred technical solution, the air intake component includes an air inlet, an air intake sleeve, a jet nozzle, a first air passage, a connecting ring, and a second air passage; The explosion chamber is provided with an air inlet, an air inlet sleeve is installed on the air inlet, a jet nozzle is nested inside the air inlet sleeve, a first air passage is provided inside the air inlet sleeve, a connecting ring is rotatably installed at the end of the air inlet sleeve, the connecting ring is located inside the explosion chamber, a second air passage is provided on the connecting ring, the first air passage and the second air passage are connected, and the connecting ring is connected to a cage-shaped rotating component.

[0008] As a preferred technical solution, the cage-shaped rotating component includes an arc plate, an inner air passage, and an inner nozzle; The driven rotor and the connecting ring are coaxially arranged inside the explosion chamber. The driven rotor and the connecting ring are connected by multiple arc plates. The multiple arc plates are evenly arranged in a circle on the driven rotor and the connecting ring. An internal air passage is opened inside the arc plate. Multiple internal nozzles are installed on the side of the arc plate near the inside of the explosion chamber. The second air passage is connected to the internal nozzles through the internal air passage.

[0009] As a preferred technical solution, the transmission component includes an exhaust port, a sealing seat, a main control valve, an exhaust pipe, a bottom chamber, an annular groove, a slide cylinder, an elastic element, an internal pressure relief hole, an external pressure relief hole, an intermittent valve, a first blocking sensor, a second blocking sensor, a slide rod, a screw, a drive bevel gear, a transmission bevel gear, and a transmission chain; The explosion chamber is equipped with an exhaust port, a sealing seat is installed at the exhaust port, and a master control valve and an exhaust pipe are installed on the sealing seat. A bottom chamber and an annular groove are installed below the base. The annular groove is located inside the bottom chamber. A slide cylinder is slidably installed on the annular groove. The slide cylinder is connected to the base by an elastic element. An internal pressure relief hole and an external pressure relief hole are provided on the annular groove. An intermittent valve is installed on the internal pressure relief hole. A first shielding sensor and a second shielding sensor are installed on the annular groove. The second shielding sensor is farther away from the base than the first shielding sensor. A slide rod is installed on the slide cylinder. A screw is rotatably installed on the bottom chamber. The screw is threadedly engaged with the slide rod. A drive bevel gear is provided on the screw. A transmission bevel gear is installed on the mounting plate. The drive bevel gear meshes with the transmission bevel gear. The transmission bevel gear is connected to the drive rotor through a transmission chain.

[0010] As a preferred technical solution, the transmission component further includes a clutch chamber, a driving friction plate, a driven friction plate, and an electric telescopic rod; The base has a clutch chamber, the screw passes through the clutch chamber, an electric telescopic rod is installed on the screw, a driving friction plate is installed on the electric telescopic rod, a driven friction plate is installed on the driving bevel gear, and the driving bevel gear, the screw and the driving friction plate are coaxially mounted.

[0011] As a preferred technical solution, the energy storage device includes a buffer airbag, an air supply pipe, a pressure airbag, a cleaning pipe, and a cleaning valve; The side of the slide cylinder away from the elastic element is connected to the bottom chamber via a buffer airbag. A pressure airbag is installed inside the bottom chamber. The pressure airbag and the buffer airbag are connected via an air supply pipe. A cleaning pipe is installed on the pressure airbag, and a cleaning valve is installed on the cleaning pipe.

[0012] As a preferred technical solution, an air outlet is provided on the bottom compartment, and a filter is installed on the air outlet.

[0013] As a preferred technical solution, a pressure sensor and a low-pressure valve are installed on the exhaust pipe, and the pressure sensor controls the opening and closing of the low-pressure valve.

[0014] As a preferred technical solution, an angle sensor is installed on the driven rotor, and the angle sensor controls the operation of the drive motor.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The alternating magnetic field generated by the active rotor during rotation drives the driven permanent magnet to rotate synchronously. This stirring method can achieve rapid homogenization of gas without damaging the seal, improving the mixing effect while avoiding gas leakage and ensuring the detection effect.

[0016] 2. The second gas mixes with the first gas simultaneously from multiple directions, and as the arc plate rotates, it generates shear force on the mixed gas, producing eddies and enhancing the mixing effect.

[0017] 3. The transmission components discharge exhaust gas in stages during exhaust. By breaking down the scale of single energy release and controlling the pressure impact rate, the damage caused by shock waves, overpressure, or high-speed airflow resulting from the concentrated release of instantaneous energy is avoided. At the same time, the energy of the exhaust is used to reduce exhaust gas residue and enhance the exhaust cleaning effect on the explosion chamber.

[0018] 4. By storing and utilizing the energy of high-pressure exhaust gas through energy storage components, the resource utilization rate can be improved and the cost reduced. At the same time, if the slide moves down too quickly, the gas in the buffer bag may not be discharged in time, which can also buffer the slide, reduce damage to the slide, and improve the service life of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main view structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 For the present invention Figure 2 Enlarged structural diagram at point C; Figure 6 This is a schematic diagram of the first partial structure of the present invention; Figure 7 This is a schematic diagram of the second partial structure of the present invention; Figure 8 This is a cross-sectional structural diagram of the third part of the present invention.

[0020] In the diagram: 1. Base; 2. Mounting bracket; 3. Explosion chamber; 4. Igniter; 5. Extractor; 6. Mounting plate; 7. Drive motor; 8. Mounting hole; 9. Sealing plate; 10. Active rotor; 11. Driven rotor; 12. Air inlet; 13. Air inlet sleeve; 14. Jet nozzle; 15. First air passage; 16. Connecting ring; 17. Second air passage; 18. Arc plate; 19. Inner air passage; 20. Inner nozzle; 21. Exhaust port; 22. Sealing seat; 23. Master control valve; 24. Exhaust pipe; 25. Bottom chamber; 26. Annular groove; 27. Slide cylinder; 28. Elastic element; 29. Internal pressure relief hole; 30. External pressure relief hole; 31. Intermittent valve; 32. First blocking sensor; 33. Second blocking sensor; 34. Sliding rod; 35. Screw; 36. Drive bevel gear; 37. Transmission bevel gear; 38. Transmission chain; 39. Clutch chamber; 40. Drive friction plate; 41. Driven friction plate; 42. Buffer airbag; 43. Air supply pipe; 44. Pressure airbag; 45. Cleaning pipe; 46. Cleaning valve; 47. Air outlet; 48. Filter element; 49. Pressure sensor; 50. Low-pressure valve; 51. Angle sensor; 52. Electric telescopic rod. Detailed Implementation

[0021] 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.

[0022] Example: Figures 1-8 As shown, the present invention provides a technical solution for a self-mixing gas explosion limit testing device. The self-mixing gas explosion limit testing device includes a base 1, a mounting frame 2 installed on the base 1, an explosion chamber 3 installed on the mounting frame 2, an exhaust component 5 installed on the explosion chamber 3, an igniter 4 installed on the explosion chamber 3, an air inlet component and a stirring component are provided inside the explosion chamber 3, and an exhaust component is provided below the base 1. The exhaust component includes a transmission component and an energy storage component. The mixing components include a mounting plate 6, a drive motor 7, mounting holes 8, a sealing plate 9, a driving rotor 10, a driven rotor 11, and a cage-shaped rotating component; A mounting plate 6 is installed on the base 1, and a drive motor 7 is installed on the mounting plate 6. An installation hole 8 is opened on the explosion chamber 3, and a sealing plate 9 is installed on the installation hole 8. A driven rotor 11 is installed on the installation hole 8. The driven rotor 11 is located on the side of the sealing plate 9 closer to the inside of the explosion chamber 3. An active rotor 10 is installed at the output end of the drive motor 7. The active rotor 10 is located on the outside of the explosion chamber 3. The active rotor 10 and the driven rotor 11 are coaxially installed. A cage-shaped rotating component is installed on the driven rotor 11. The cage-shaped rotating component cooperates with the air intake component to mix the gas while the air is being intaked.

[0023] This testing device is connected to an external control terminal during use to control its operation. The vacuum pump 5, drive motor 7, and igniter are all electrically connected to the control terminal. When an explosion limit test is required, the control terminal first controls the vacuum pump 5 to evacuate the explosion chamber 3. Then, the control terminal's air intake device inputs mixed gas into the explosion chamber 3. At the same time as the gas is input, the control terminal starts the drive motor 7. The drive motor 7 drives the active rotor 10 to rotate. The active rotor 10 and the driven rotor 11 are magnetically coupled and have matched pole numbers. When the active rotor 10 rotates, the alternating magnetic field generated by the sealing plate 9 drives the driven rotor 11 to rotate synchronously. The torque is transmitted entirely through magnetic force. When the driven rotor 11 rotates, it drives the stirring device to mix the gas, improving the mixing uniformity and mixing speed. Through this stirring method, the gas can be rapidly homogenized without damaging the sealing performance, improving the mixing effect while avoiding gas leakage and ensuring the detection effect. By combining exhaust and energy storage components, the high-pressure gas generated during the explosion test is utilized to clean the explosion chamber 3, thereby improving the test results and increasing resource utilization.

[0024] The air intake component includes an air inlet 12, an air inlet sleeve 13, a jet nozzle 14, a first air passage 15, a connecting ring 16, and a second air passage 17; An air inlet 12 is provided on the explosion chamber 3. An air inlet sleeve 13 is installed on the air inlet 12. A jet nozzle 14 is nested inside the air inlet sleeve 13. A first air passage 15 is provided inside the air inlet sleeve 13. A connecting ring 16 is rotatably installed at the end of the air inlet sleeve 13. The connecting ring 16 is located inside the explosion chamber 3. A second air passage 17 is provided on the connecting ring 16. The first air passage 15 and the second air passage 17 are connected. The connecting ring 16 is connected to the cage-shaped rotating component.

[0025] The cage-shaped rotating component includes an arc plate 18, an inner air passage 19, and an inner nozzle 20; The driven rotor 11 and the connecting ring 16 are coaxially arranged inside the explosion chamber 3. The driven rotor 11 and the connecting ring 16 are connected by multiple arc plates 18. The multiple arc plates 18 are evenly arranged in a circle on the driven rotor 11 and the connecting ring 16. An internal air passage 19 is opened inside the arc plate 18. Multiple internal nozzles 20 are installed on the side of the arc plate 18 near the inside of the explosion chamber 3. The second air passage 17 is connected to the internal nozzles 20 through the internal air passage 19.

[0026] When gas is input, the jet nozzle 14 is connected to the first gas and the air inlet sleeve 13 is connected to the second gas. The first gas is injected into the explosion chamber 3 through the jet nozzle 14. The second gas enters the inner air passage 19 through the first air passage 15 and the second air passage 17, and is injected into the explosion chamber 3 through the inner nozzle 20. At this time, the rotation of the driven rotor 11 will drive the arc plate 18 and the inner nozzle 20 to rotate. The jet nozzle 14 sprays towards the center of the explosion chamber 3, and the spray of the inner nozzle 20 is perpendicular to the central axis of the first gas injection path. Therefore, the second gas mixes with the first gas from multiple directions at the same time, and the rotation of the arc plate 18 generates shear force on the mixed gas, generating vortices and enhancing the mixing effect. The rotation of the arc plate 18 drives the rotation of the gas to mix the gas. The arc plate 18 is close to the explosion chamber 3 for stirring, which can ensure rapid mixing while reducing the damage of the explosion to the stirring components and extending the service life of the device.

[0027] The transmission components include an exhaust port 21, a sealing seat 22, a main control valve 23, an exhaust pipe 24, a bottom chamber 25, an annular groove 26, a slide cylinder 27, an elastic element 28, an internal pressure relief hole 29, an external pressure relief hole 30, an intermittent valve 31, a first blocking sensor 32, a second blocking sensor 33, a slide rod 34, a screw 35, a drive bevel gear 36, a transmission bevel gear 37, and a transmission chain 38; The explosion chamber 3 is equipped with an exhaust port 21, and a sealing seat 22 is installed at the exhaust port 21. A main control valve 23 and an exhaust pipe 24 are installed on the sealing seat 22. A bottom chamber 25 and an annular groove 26 are installed below the base 1. The annular groove 26 is located inside the bottom chamber 25. A slide cylinder 27 is slidably installed on the annular groove 26. The slide cylinder 27 is connected to the base 1 by an elastic element 28. An internal pressure relief hole 29 and an external pressure relief hole 30 are provided on the annular groove 26. An intermittent valve 31 is installed on the internal pressure relief hole 29. An external pressure relief hole 30 is installed on the annular groove 26. There is a first occlusion sensor 32 and a second occlusion sensor 33. The second occlusion sensor 33 is far away from the base 1 relative to the first occlusion sensor 32. A slide rod 34 is installed on the slide cylinder 27. A screw 35 is rotatably installed on the bottom chamber 25. The screw 35 is threadedly engaged with the slide rod 34. A drive bevel gear 36 is provided on the screw 35. A transmission bevel gear 37 is installed on the mounting plate 6. The drive bevel gear 36 and the transmission bevel gear 37 mesh. The transmission bevel gear 37 is connected to the drive rotor 10 through a transmission chain 38.

[0028] The main control valve 23 is electrically connected to the control terminal. The first blocking sensor 32 controls the closing of the intermittent valve 31, and the second blocking sensor 33 controls the opening of the intermittent valve 31. Initially, the intermittent valve 31 is in the closed state. During the test, the main control valve 23 is closed. After the explosion test, the main control valve 23 is opened via the control terminal, and high-pressure gas is discharged into the slide cylinder 27 through the exhaust pipe 24. This generates a downward impact force on the slide cylinder 27 and increases the gas pressure between the slide cylinder 27 and the base 1, pushing the slide cylinder 27 downward. When the slide cylinder 27 passes the first shielding sensor 32, the intermittent valve 31 is still closed. After the slide cylinder 27 passes the second shielding sensor 33, the intermittent valve 31 opens, and the gas inside the slide cylinder 27 is quickly discharged through the inner pressure relief hole 29 and the outer pressure relief hole 30. As the gas is discharged, the gas pressure decreases, and the slide cylinder 27 moves upward. When the slide cylinder 27 contacts the first shielding sensor 32... When the intermittent valve 31 closes, the air pressure inside the slide cylinder 27 increases again, and the slide cylinder 27 is pushed downward. This cycle repeats, and the slide cylinder 27 slides up and down, causing the slide rod 34 to slide synchronously along the screw 35. The slide rod 34 drives the screw 35 to rotate through its cooperation with the screw 35. The rotation of the screw 35 causes the drive bevel gear 36 to drive the transmission bevel gear 37 to rotate through gear meshing. The transmission bevel gear 37 drives the active rotor 10 to rotate through the transmission rod chain. The rotation of the active rotor 10 drives the cage-shaped rotating component to rotate through the driven rotor 11. During exhaust, the rotation of the cage-shaped rotating component disturbs the airflow in the explosion chamber 3, preventing the waste gas from remaining in the dead zone and improving the waste gas discharge effect. The transmission component discharges exhaust gas in stages during exhaust. By breaking down the scale of single energy release and controlling the pressure impact rate, it avoids damage caused by shock waves, overpressure, or high-speed airflow resulting from concentrated release of instantaneous energy. At the same time, it utilizes the energy of exhaust to reduce exhaust gas residue and enhances the exhaust cleaning effect on the explosion chamber 3.

[0029] The transmission components also include a clutch chamber 39, a driving friction plate 40, a driven friction plate 41, and an electric telescopic rod; A clutch chamber 39 is provided on the base 1, and a screw 35 passes through the clutch chamber 39. An electric telescopic rod is installed on the screw 35, and a driving friction plate 40 is installed on the electric telescopic rod. A driven friction plate 41 is installed on the driving bevel gear 36. The driving bevel gear 36, the screw 35 and the driving friction plate 40 are coaxially installed.

[0030] When the electric telescopic rod is electrically connected to the control end, it is in the extended state during exhaust. The active friction plate and the driven friction plate 41 come into contact to achieve transmission. In the working state other than exhaust, the electric telescopic rod is in the retracted state to avoid the rotation of the active rotor 10 driving the slide 27 to move uselessly, reduce unnecessary transmission, reduce wear, and extend the service life of the device.

[0031] The energy storage device includes a buffer airbag 42, an air supply pipe 43, a pressure airbag 44, a cleaning pipe 45, and a cleaning valve 46; The side of the slide cylinder 27 away from the elastic element 28 is connected to the bottom chamber 25 through the buffer airbag 42. The bottom chamber 25 is equipped with a pressure airbag 44. The pressure airbag 44 and the buffer airbag 42 are connected through an air supply pipe 43. A cleaning pipe 45 is installed on the pressure airbag 44. A cleaning valve 46 is installed on the cleaning pipe 45. The air supply pipe 43 is a one-way air pipe. When the slide cylinder 27 moves down, the slide cylinder 27 squeezes the buffer airbag 42. The gas in the buffer airbag 42 is squeezed into the pressure airbag 44 through the air supply pipe 43 for energy storage. The buffer airbag 42 is equipped with an air inlet pipe connected to the bottom chamber 25 for replenishing air. The cleaning valve 46 is electrically connected to the control terminal. When cleaning is required after exhaust, the cleaning pipe 45 is connected to the inlet of the air inlet sleeve 13 or the inlet of the jet nozzle 14. The cleaning valve 46 is opened at the control end, and the gas in the pressure bladder 44 enters the explosion chamber 3 to exchange and clean with the exhaust gas. The energy of the high-pressure exhaust gas is stored and utilized through the energy storage device to improve resource utilization and reduce costs. At the same time, if the slide 27 moves down too fast, the gas in the buffer bladder 42 can also buffer the slide 27 if it is not discharged in time, reducing the damage to the slide 27 and improving the service life of the device.

[0032] An air outlet 47 is provided on the bottom compartment 25, and a filter element 48 is installed on the air outlet 47.

[0033] After the exhaust gas is discharged from the slide 27, it needs to be discharged from the bottom chamber 25. The exhaust gas may contain pollutants, so it is filtered by the filter element 48 before being discharged to avoid environmental pollution and harm to the test personnel.

[0034] A pressure sensor 49 and a low-pressure valve 50 are installed on the exhaust pipe 24. The pressure sensor 49 controls the opening and closing of the low-pressure valve 50.

[0035] Pressure sensor 49 is electrically connected to the control terminal. When pressure sensor 49 detects a decrease in air pressure and the gas in slide 27 and explosion chamber 3 is insufficient to open intermittent valve 31, pressure sensor 49 controls low-pressure valve 50 to open, which facilitates subsequent cleaning of explosion chamber 3 and discharge of residual small amount of exhaust gas.

[0036] An angle sensor 51 is installed on the driven rotor 11, and the angle sensor 51 controls the operation of the drive motor 7.

[0037] During vacuuming, the arc plate 18 may block the normal flow of gas. At this time, the angle sensor 51 will control the drive motor 7 to drive the arc plate 18 for fine adjustment to avoid affecting the normal flow of gas and ensure the normal operation of the device and the quality of the test.

[0038] Working principle of the invention: This testing device is connected to an external control terminal during use to control its operation. The vacuum pump 5, drive motor 7, and igniter are all electrically connected to the control terminal. When an explosion limit test is required, the control terminal first controls the vacuum pump 5 to evacuate the explosion chamber 3. Then, the control terminal's air intake device inputs mixed gas into the explosion chamber 3. At the same time as the gas is input, the control terminal starts the drive motor 7. The drive motor 7 drives the copper rotor to rotate. The pole numbers of the active rotor 10 and the driven rotor 11 are matched. When the active rotor 10 rotates, the alternating magnetic field generated by the sealing plate 9 drives the driven permanent magnet to rotate synchronously. The torque is transmitted entirely through magnetic force. When the driven rotor 11 rotates, it drives the stirring device to mix the gas, improving the mixing uniformity and mixing speed. Through this stirring method, the gas can be rapidly homogenized without damaging the sealing performance, improving the mixing effect while avoiding gas leakage and ensuring the detection effect. By combining exhaust and energy storage components, the high-pressure gas generated during the explosion test is utilized to clean the explosion chamber 3, thereby improving the test results and increasing resource utilization.

[0039] When gas is input, the jet nozzle 14 is connected to the first gas and the air inlet sleeve 13 is connected to the second gas. The first gas is injected into the explosion chamber 3 through the jet nozzle 14. The second gas enters the inner air passage 19 through the first air passage 15 and the second air passage 17, and is injected into the explosion chamber 3 through the inner nozzle 20. At this time, the rotation of the driven rotor 11 will drive the arc plate 18 and the inner nozzle 20 to rotate. The jet nozzle 14 sprays towards the center of the explosion chamber 3, and the spray of the inner nozzle 20 is perpendicular to the central axis of the first gas injection path. Therefore, the second gas mixes with the first gas from multiple directions at the same time, and the rotation of the arc plate 18 generates shear force on the mixed gas, generating vortices and enhancing the mixing effect. The rotation of the arc plate 18 drives the rotation of the gas to mix the gas. The arc plate 18 is close to the explosion chamber 3 for stirring, which can ensure rapid mixing while reducing the damage of the explosion to the stirring components and extending the service life of the device.

[0040] The main control valve 23 is electrically connected to the control terminal. The first blocking sensor 32 controls the closing of the intermittent valve 31, and the second blocking sensor 33 controls the opening of the intermittent valve 31. Initially, the intermittent valve 31 is in the closed state. During the test, the main control valve 23 is closed. After the explosion test, the main control valve 23 is opened via the control terminal, and high-pressure gas is discharged into the slide cylinder 27 through the exhaust pipe 24. This generates a downward impact force on the slide cylinder 27 and increases the gas pressure between the slide cylinder 27 and the base 1, pushing the slide cylinder 27 downward. When the slide cylinder 27 passes the first shielding sensor 32, the intermittent valve 31 is still closed. After the slide cylinder 27 passes the second shielding sensor 33, the intermittent valve 31 opens, and the gas inside the slide cylinder 27 is quickly discharged through the inner pressure relief hole 29 and the outer pressure relief hole 30. As the gas is discharged, the gas pressure decreases, and the slide cylinder 27 moves upward. When the slide cylinder 27 contacts the first shielding sensor 32... When the intermittent valve 31 closes, the air pressure inside the slide cylinder 27 increases again, and the slide cylinder 27 is pushed downward. This cycle repeats, and the slide cylinder 27 slides up and down, causing the slide rod 34 to slide synchronously along the screw 35. The slide rod 34 drives the screw 35 to rotate through its cooperation with the screw 35. The rotation of the screw 35 causes the drive bevel gear 36 to drive the transmission bevel gear 37 to rotate through gear meshing. The transmission bevel gear 37 drives the active rotor 10 to rotate through the transmission rod chain. The rotation of the active rotor 10 drives the cage-shaped rotating component to rotate through the driven rotor 11. During exhaust, the rotation of the cage-shaped rotating component disturbs the airflow in the explosion chamber 3, preventing the waste gas from remaining in the dead zone and improving the waste gas discharge effect. The transmission component discharges exhaust gas in stages during exhaust. By breaking down the scale of single energy release and controlling the pressure impact rate, it avoids damage caused by shock waves, overpressure, or high-speed airflow resulting from concentrated release of instantaneous energy. At the same time, it utilizes the energy of exhaust to reduce exhaust gas residue and enhances the exhaust cleaning effect on the explosion chamber 3.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A self-mixing gas explosion limit testing device, characterized in that: The self-mixing gas explosion limit test device includes a base (1), a mounting frame (2) is installed on the base (1), an explosion chamber (3) is installed on the mounting frame (2), an exhaust component (5) is installed on the explosion chamber (3), an igniter (4) is installed on the explosion chamber (3), an air inlet component and a stirring component are provided inside the explosion chamber (3), and an exhaust component is provided below the base (1). The exhaust component includes a transmission component and an energy storage component. The stirring component includes a mounting plate (6), a drive motor (7), a mounting hole (8), a sealing plate (9), a driving rotor (10), a driven rotor (11), and a cage-shaped rotating component; An mounting plate (6) is installed on the base (1), a drive motor (7) is installed on the mounting plate (6), an installation hole (8) is opened on the explosion chamber (3), a sealing plate (9) is installed on the installation hole (8), a driven rotor (11) is installed on the installation hole (8), the driven rotor (11) is located on the side of the sealing plate (9) closer to the inside of the explosion chamber (3), an active rotor (10) is installed at the output end of the drive motor (7), the active rotor (10) is located on the outside of the explosion chamber (3), the active rotor (10) and the driven rotor (11) are coaxially installed, a cage-shaped rotating component is installed on the driven rotor (11), the cage-shaped rotating component cooperates with the air intake component to mix the gas while the air is being introduced.

2. The self-mixing gas explosion limit testing device according to claim 1, characterized in that: The air intake component includes an air inlet (12), an air inlet sleeve (13), a jet nozzle (14), a first air passage (15), a connecting ring (16), and a second air passage (17); The explosion chamber (3) is provided with an air inlet (12), an air inlet sleeve (13) is installed on the air inlet (12), a jet nozzle (14) is nested inside the air inlet sleeve (13), a first air passage (15) is provided inside the air inlet sleeve (13), a connecting ring (16) is rotatably installed at the end of the air inlet sleeve (13), the connecting ring (16) is located inside the explosion chamber (3), a second air passage (17) is provided on the connecting ring (16), the first air passage (15) and the second air passage (17) are connected, and the connecting ring (16) is connected to the cage-shaped rotating component.

3. The self-mixing gas explosion limit testing device according to claim 2, characterized in that: The cage-shaped rotating component includes an arc plate (18), an inner air passage (19), and an inner nozzle (20). The driven rotor (11) and the connecting ring (16) are coaxially arranged inside the explosion chamber (3). The driven rotor (11) and the connecting ring (16) are connected by multiple arc plates (18). The multiple arc plates (18) are evenly arranged in a circle on the driven rotor (11) and the connecting ring (16). An internal air passage (19) is opened inside the arc plate (18). Multiple internal nozzles (20) are installed on the side of the arc plate (18) near the inside of the explosion chamber (3). The second air passage (17) is connected to the internal nozzles (20) through the internal air passage (19).

4. The self-mixing gas explosion limit testing device according to claim 1, characterized in that: The transmission components include an exhaust port (21), a sealing seat (22), a main control valve (23), an exhaust pipe (24), a bottom chamber (25), an annular groove (26), a slide cylinder (27), an elastic element (28), an inner pressure relief hole (29), an outer pressure relief hole (30), an intermittent valve (31), a first blocking sensor (32), a second blocking sensor (33), a slide rod (34), a screw (35), a drive bevel gear (36), a transmission bevel gear (37), and a transmission chain (38). The explosion chamber (3) is provided with an exhaust port (21), and a sealing seat (22) is installed at the exhaust port (21). A master control valve (23) and an exhaust pipe (24) are installed on the sealing seat (22). A bottom chamber (25) and an annular groove (26) are installed below the base (1). The annular groove (26) is located inside the bottom chamber (25). A slide cylinder (27) is slidably installed on the annular groove (26). The slide cylinder (27) is connected to the base (1) through an elastic element (28). An internal pressure relief hole (29) and an external pressure relief hole (30) are provided on the annular groove (26). An intermittent valve (31) is installed on the internal pressure relief hole (29). 26) A first occlusion sensor (32) and a second occlusion sensor are installed on the base (1). The second occlusion sensor (33) is far away from the base (1) relative to the first occlusion sensor (32). A slide rod (34) is installed on the slide cylinder (27). A screw (35) is rotatably installed on the bottom chamber (25). The screw (35) is threadedly engaged with the slide rod (34). A drive bevel gear (36) is provided on the screw (35). A transmission bevel gear (37) is installed on the mounting plate (6). The drive bevel gear (36) meshes with the transmission bevel gear (37). The transmission bevel gear (37) is connected to the active rotor (10) through a transmission chain (38).

5. The self-mixing gas explosion limit testing device according to claim 4, characterized in that: The transmission component also includes a clutch chamber (39), a driving friction plate (40), a driven friction plate (41), and an electric telescopic rod; The base (1) has a clutch chamber (39) and the screw (35) passes through the clutch chamber (39). An electric telescopic rod is installed on the screw (35) and a driving friction plate (40) is installed on the electric telescopic rod. A driven friction plate (41) is installed on the driving bevel gear (36). The driving bevel gear (36), the screw (35) and the driving friction plate (40) are coaxially installed.

6. The self-mixing gas explosion limit testing device according to claim 4, characterized in that: The energy storage device includes a buffer airbag (42), an air supply pipe (43), a pressure airbag (44), a cleaning pipe (45), and a cleaning valve (46). The side of the slide (27) away from the elastic element (28) is connected to the bottom chamber (25) through a buffer airbag (42). A pressure airbag (44) is installed in the bottom chamber (25). The pressure airbag (44) is connected to the buffer airbag (42) through an air supply pipe (43). A cleaning pipe (45) is installed on the pressure airbag (44), and a cleaning valve (46) is installed on the cleaning pipe (45).

7. The self-mixing gas explosion limit testing device according to claim 4, characterized in that: An air outlet (47) is provided on the bottom compartment (25), and a filter element (48) is installed on the air outlet (47).

8. The self-mixing gas explosion limit testing device according to claim 4, characterized in that: A pressure sensor (49) and a low-pressure valve (50) are installed on the exhaust pipe (24), and the pressure sensor (49) controls the opening and closing of the low-pressure valve (50).

9. The self-mixing gas explosion limit testing device according to claim 1, characterized in that: An angle sensor (51) is installed on the driven rotor (11), and the angle sensor (51) controls the operation of the drive motor (7).

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