Super-flow aerosol on-line sampling monitoring equipment

Abstract

This invention relates to the field of aerosol monitoring technology, and more particularly to an online sampling and monitoring device for ultra-high flow rates of aerosols. It includes a mounting frame on which mirror-distributed monitoring tubes are fixedly mounted. These mirror-distributed monitoring tubes are rotatably connected to a rotating ring. Several sampling tubes are fixedly mounted on the rotating ring, passing through it. These sampling tubes are collectively fixed to a fixed ring. A transfer shell is fixedly mounted on the mounting frame. A flow rate monitor is installed on one side of each monitoring tube. An air pump is fixedly mounted to the transfer shell via a mounting frame. This invention measures the air velocity using the flow rate monitor and controls the air pump power based on the air velocity, thereby adjusting the sampling volume per unit time. This ensures that each sampling and monitoring is conducted under the same sampling baseline, thus improving the spatiotemporal comparability of multiple sets of sampling data from different batches and ensuring the accuracy of aerosol pollution characteristic analysis.

Description

Technical Field

[0001] This invention relates to the field of aerosol monitoring technology, and in particular to an online sampling and monitoring device for ultra-high flow rate aerosols. Background Technology

[0002] Aerosols are dispersion systems formed by tiny particles suspended in a gas. The particle size is usually between 0.001 micrometers and 100 micrometers. These particles may contain harmful substances (such as PM2.5, PM10, viruses, bacteria, chemical pollutants, etc.). During the production of some emerging materials, the exhaust gas often contains the above-mentioned harmful substances. If the exhaust gas is not treated to meet the standards and is discharged into the atmosphere, it will cause pollution to the atmosphere. In atmospheric environmental monitoring, aerosol concentration and particle size distribution are important indicators.

[0003] Traditional aerosol sampling equipment has a low flow rate (e.g., 1-30 liters / minute), suitable for routine monitoring, but has limitations when rapid sampling or capturing high concentrations of particles is required. Ultra-high flow rate aerosol sampling equipment, by increasing the sampling flow rate (e.g., hundreds of liters / minute or even thousands of liters / minute), can capture more aerosol particles in a shorter time, improving detection sensitivity and efficiency.

[0004] It is worth noting that existing aerosol sampling systems generally have a critical technical blind spot in their engineering design: the current sampling process relies solely on a fixed flow rate mechanism of active extraction by an air pump, while ignoring the interference of external gas dynamic parameters such as ambient wind speed on the effective sampling volume (i.e., the total amount of data that flows through the sampling device without being pulled by an air pump during the sampling process). This flow rate mismatch sampling method will lead to dynamic fluctuations in the sample base, especially in open environments or scenarios with significant changes in air flow rate. This will seriously weaken the spatiotemporal comparability of multiple sets of sampling data, and ultimately affect the accuracy of aerosol pollution characteristic analysis. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings, the present invention provides an online sampling and monitoring device for ultra-high flow rate aerosols.

[0006] The technical implementation scheme of the present invention is as follows: an ultra-high flow rate aerosol online sampling and monitoring device, comprising a mounting frame, on which mirror-distributed monitoring tubes are fixedly connected, and the mirror-distributed monitoring tubes are rotatably connected to a rotating ring, wherein a plurality of sampling tubes are fixedly connected to the rotating ring, the sampling tubes passing through the rotating ring, and the plurality of sampling tubes are jointly fixedly connected to a fixed ring, wherein a transfer shell is fixedly connected to the mounting frame, the transfer shell is rotatably connected to the fixed ring, the sampling tubes are connected to the transfer shell, a flow rate monitor is provided on one side of the monitoring tubes, an air pump is fixedly connected to the transfer shell through a mounting frame, the transfer shell is connected to the air inlet of the air pump through a pipe, a sample storage shell is fixedly connected to the mounting frame, the sample storage shell is connected to the air outlet of the air pump through a pipe, the sample storage shell is provided with an exhaust hole, and a sealing mechanism is provided on the mounting frame for changing the sealing state of the sample storage shell according to the sampling situation.

[0007] Furthermore, a number of the sampling tubes are evenly distributed circumferentially on the fixed ring, and the mounting frame is equipped with a drive module for driving the rotating ring to rotate.

[0008] Furthermore, an electric rotating shaft is provided inside the sample storage shell, a heating plate is provided on the outer surface of the electric rotating shaft, and several guide blocks arranged in a spiral are fixed on the electric rotating shaft.

[0009] Furthermore, the sealing mechanism includes an electric push rod, which is fixedly connected to the mounting frame. The telescopic end of the electric push rod is fixedly connected to a first sliding shell via the mounting frame. A monitoring filter membrane is installed inside the first sliding shell. The first sliding shell is slidably connected to the sample storage shell. The first sliding shell is used to cover the vent hole on the sample storage shell. An outer air bladder and an inner air bladder are fixedly connected to the side of the first sliding shell near the sample storage shell.

[0010] Furthermore, the sealing mechanism also includes two air storage shells, both of which are fixedly connected to the first sliding shell. The two air storage shells are respectively connected to the outer air bladder and the inner air bladder. A piston is slidably connected inside each air storage shell, and a spring is provided between the piston and the adjacent air storage shell.

[0011] Furthermore, the sealing mechanism also includes a pointer rod, which is fixed to the piston in the air storage shell that communicates with the inner air bladder, and the pointer rod is provided with a scale.

[0012] Furthermore, it also includes a circulation mechanism disposed within the sample storage shell. The circulation mechanism includes a separator sleeve fixedly connected within the sample storage shell. The separator sleeve is made of a flexible material and allows only gas to pass through. A second sliding shell is slidably connected within the sample storage shell. The second sliding shell is used to compress the separator sleeve. The second sliding shell is provided with several nozzles and is connected to a first air inlet pipe. The first air inlet pipe is slidably and sealed to the sample storage shell.

[0013] Furthermore, the circulation mechanism also includes a fixed frame, which is fixedly connected to the second sliding shell and is slidably connected to the sample storage shell. A threaded rod is rotatably connected to the sample storage shell and is threadedly connected to the fixed frame.

[0014] Furthermore, a second air inlet pipe is fixedly connected to one side of the sampling tube, all the sampling tubes are connected by a common connecting pipe, and a solenoid valve is provided on the side of all the sampling tubes near the axis of the rotating ring.

[0015] Furthermore, an air baffle is fixedly connected to the lower side of the pipe connecting the transfer shell and the air pump. The diameter of the air baffle is larger than the diameter of the sampling tube, and it is used to block the sampling tube.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The present invention measures the air velocity by means of a flow rate monitor, controls the power of the air pump according to the air velocity, and then adjusts the sampling amount per unit time, so as to ensure that each sampling and monitoring is carried out under the condition of the same sampling base, thereby improving the spatiotemporal comparability of multiple sets of sampling data in different batches and ensuring the accuracy of aerosol pollution characteristic analysis.

[0017] 2. By cooperating with the piston, the sealing degree between the outer and inner air bladders and the sample storage shell is synchronously adjusted according to different pressure conditions (different air pump power), ensuring the sealing performance of this device during a single sampling and monitoring process, thereby preventing the external environment from affecting the monitoring results.

[0018] 3. By cooperating with the second sliding shell and the partition sleeve, aerosols are intercepted and pushed out, while all sampling tubes are sealed. This allows pure air to continuously circulate and impact within the flow channel of the device, reducing the amount of aerosols adhering to the inside of the device during a single sampling and monitoring process, thus affecting the accuracy of the monitoring data. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the internal structure of the monitoring tube of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the internal structure of the sample storage shell of the present invention;

[0022] Figure 4 This is a three-dimensional structural cross-sectional view of the sample storage shell and the separator sleeve of the present invention;

[0023] Figure 5 This is a three-dimensional cross-sectional view of the outer and inner airbags of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the piston and indicator rod of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the second sliding shell of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the nozzle and the first air inlet pipe of the present invention;

[0027] Figure 9 This is a three-dimensional structural diagram of the fixing frame and threaded rod of the present invention;

[0028] Figure 10 This is a three-dimensional structural diagram of the second air intake pipe and the connecting pipe of the present invention.

[0029] The attached figures are labeled as follows: 1: mounting frame, 2: monitoring tube, 3: rotating ring, 4: sampling tube, 5: fixing ring, 6: transfer shell, 7: flow rate monitor, 8: air pump, 9: sample storage shell, 10: electric rotating shaft, 11: electric push rod, 12: first sliding shell, 13: outer air bladder, 14: inner air bladder, 15: air storage shell, 16: piston, 17: indicator rod, 18: separator sleeve, 19: second sliding shell, 20: nozzle, 21: first air inlet pipe, 22: fixing frame, 23: threaded rod, 24: second air inlet pipe, 25: connecting pipe, 26: baffle plate. Detailed Implementation

[0030] 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.

[0031] Example 1: An online sampling and monitoring device for ultra-high flow rate aerosols, such as Figures 1-5As shown, the system includes a mounting frame 1, on which mirror-distributed monitoring tubes 2 are fixedly mounted. A rotating ring 3 connects the mirror-distributed monitoring tubes 2 rotatably. Several sampling tubes 4 are fixedly mounted on the rotating ring 3, passing through the rotating ring 3. A fixed ring 5 connects the sampling tubes 4 together to the fixed ring 5. A transfer shell 6 is fixedly mounted on the mounting frame 1 and rotatably connected to the fixed ring 5. The sampling tubes 4 communicate with the transfer shell 6. A flow rate monitor 7 is installed on one side of each monitoring tube 2. An air pump 8 is fixedly mounted on the transfer shell 6 via a mounting frame. The transfer shell 6 is connected to the air pump 8 via a pipe. The air inlet is connected, and the sample storage shell 9 is fixedly attached to the mounting frame 1. The sample storage shell 9 is connected to the air outlet of the air pump 8 through a pipe. The sample storage shell 9 is provided with an exhaust hole. The mounting frame 1 is provided with a sealing mechanism for changing the sealing state of the sample storage shell 9 according to the sampling situation. Several sampling tubes 4 are evenly distributed circumferentially on the fixing ring 5. The mounting frame 1 is provided with a drive module for driving the rotating ring 3 to rotate. An electric rotating shaft 10 is provided inside the sample storage shell 9. A heating plate is provided on the outer surface of the electric rotating shaft 10. Several guide blocks arranged in a spiral shape are fixedly attached to the electric rotating shaft 10.

[0032] In the above scheme, a control panel (not shown in the figure) is installed on the mounting frame 1, and the control panel on the mounting frame 1 is electrically connected to all electrical components of the device. The number of sampling tubes 4 can be set according to actual needs. In this scheme, there are four sampling tubes 4, and the flow area of ​​the monitoring tube 2 is greater than the sum of the connected areas of the four sampling tubes 4, so that the four sampling tubes 4 only affect the air velocity in the area near the two monitoring tubes 2. Each monitoring tube 2 is equipped with two flow velocity monitors 7, one inside and one outside, and both flow velocity monitors 7 are located outside the influence area of ​​the four sampling tubes 4. The four flow velocity monitors 7 work together to determine the flow velocity of the external environment. Intermittent monitoring is used to improve the accuracy of the flow rate monitor 7 in determining the external air flow rate. The exhaust port on the sample storage shell 9 is located on its left side. The electric heating plate on the electric rotating shaft 10 is only used to heat the air in its vicinity, causing the surrounding air to expand and decrease in density, thereby forming an upward airflow. At the same time, cooler air will be replenished from below, forming a convection circulation, causing aerosols in the cold air to tend to move towards the electric rotating shaft 10, resulting in local aerosol accumulation. When the electric rotating shaft 10 drives the spirally arranged guide plates on it to rotate, the guide plates will guide the nearby hot airflow to move to the left (towards the exhaust port of the sample storage shell 9), thereby preventing aerosol sedimentation and adhesion.

[0033] like Figure 1 and Figures 3-6As shown, the sealing mechanism includes an electric push rod 11, which is fixedly connected to the mounting frame 1. The telescopic end of the electric push rod 11 is fixedly connected to a first sliding shell 12 through the mounting frame. A monitoring filter membrane is installed inside the first sliding shell 12. The first sliding shell 12 is slidably connected to the sample storage shell 9. The first sliding shell 12 is used to cover the exhaust hole on the sample storage shell 9. An outer air bladder 13 and an inner air bladder 14 are fixedly connected to the side of the first sliding shell 12 near the sample storage shell 9.

[0034] like Figure 5 and Figure 6 As shown, the sealing mechanism also includes two air storage shells 15, both of which are fixedly connected to the first sliding shell 12. The two air storage shells 15 are respectively connected to the outer air bladder 13 and the inner air bladder 14. A piston 16 is slidably connected inside the air storage shell 15. A spring is provided between the piston 16 and the adjacent air storage shell 15. The sealing mechanism also includes a display rod 17, which is fixedly connected to the piston 16 in the air storage shell 15 connected to the inner air bladder 14. The display rod 17 is provided with a scale.

[0035] In the above scheme, the monitoring filter membrane on the first sliding shell 12 is used to intercept aerosols in the air. A removable cover is provided on the left side of the first sliding shell 12. The cover is part of the sliding shell 12. The cover is provided with a through hole, and a filter cloth that allows only air to pass through is provided in the through hole to prevent external air from contaminating the monitoring filter membrane on the first sliding shell 12. The area of ​​the first sliding shell 12 is larger than the area of ​​the exhaust hole on the sample storage shell 9. The distance between the outer airbag 13 and the sample storage shell 9 is smaller than the distance between the inner airbag 14 and the sample storage shell 9. The elastic coefficient of the spring in the air storage shell 15 connected to the outer airbag 13 is greater than the elastic coefficient of the spring in the air storage shell 15 connected to the inner airbag 14 to ensure sealing. The scale of the indicator rod 17 is not shown in the figure. The internal pressure of the inner airbag 14 when sealed is judged according to the degree of the indicator rod 17.

[0036] Specific workflow: When this device is needed to monitor aerosols in the air (hereinafter referred to as aerosols), the user first moves the device to the monitoring position, then installs a new monitoring filter membrane on the first sliding shell 12, and connects the rotating ring 3 to the drive module on the mounting frame 1. The user then controls the extension end of the electric push rod 11 to extend. The extension end of the electric push rod 11 drives the first sliding shell 12 to move to the right through the mounting frame. The first sliding shell 12 drives the outer airbag 13 and the inner airbag 14 to move to the right. The outer airbag 13 first contacts... Upon reaching the surface of the sample storage shell 9, as the outer airbag 13 continues to move to the right, compression occurs between the outer airbag 13 and the sample storage shell 9. The outer airbag 13 deforms, and the gas inside it enters the corresponding gas storage shell 15. Simultaneously, the compression piston 16 moves to the left. The compression process of the inner airbag 14 is similar. This continues until the first sliding shell 12 compresses the outer airbag 13 and the inner airbag 14 to their respective standard pressures (the pressure that matches the normal windless state). At this point, the user controls the extension end of the electric push rod 11 to stop moving, and the preparation of the device is complete.

[0037] Once the device is ready, the user starts sampling monitoring via the control panel. The control panel first calculates the sampling speed (i.e., the power of the air pump 8) based on the airflow velocity inside and outside the two monitoring tubes 2 via the four flow rate monitors 7. After calculation, the control panel starts the air pump 8 at the corresponding power. The air pump 8 simultaneously draws air from the four sampling tubes 4 through the transfer housing 6. Simultaneously, the control panel activates the drive module on the mounting frame 1, which drives the rotating ring 3 to rotate. The rotating ring 3 then drives the four sampling tubes 4 and the fixing ring 5 to rotate synchronously. This allows the four sampling tubes 4 to simultaneously extract aerosols from the air passing through the monitoring tubes 2 during rotation, improving sample representativeness. As the air pump 8 operates, it transports the aerosols through pipelines to the sample storage area. Inside the housing 9, the control panel activates the electric rotating shaft 10 and its heating plate. When air carrying aerosols moves into the sample storage housing 9, the aerosols are drawn together by the heated airflow near the electric rotating shaft 10 and gradually accumulate near it. At the same time, the aerosols move to the left under the push of the air and the guidance of the guide plate on the electric rotating shaft 10 until they reach the exhaust port on the left side of the sample storage housing 9. The aerosols then move through the exhaust port to the monitoring filter membrane on the first sliding housing 12. The monitoring filter membrane on the first sliding housing 12 intercepts the aerosols in the air, while the air flows to the outside through the monitoring filter membrane and the cap on the first sliding housing 12 until the sampling baseline is reached. Then, the control panel shuts off the air pump 8 and the drive module on the mounting frame 1, and the single aerosol sampling and monitoring is completed.

[0038] After a single aerosol sampling and monitoring is completed, the user controls the telescopic end of the electric push rod 11 to retract. The telescopic end of the electric push rod 11 drives the first sliding shell 12 and its parts to move to the left and reset. The user removes and stores the monitoring filter membrane on the first sliding shell 12. Then, the user installs a new monitoring filter membrane on the first sliding shell 12. After installation, the user repeats the above steps to control the telescopic end of the electric push rod 11 to extend again, thus completing the preparation of the device. The user then repeats the above steps several times to monitor aerosols in the air until the number of samples (i.e., the monitoring filter membrane after aerosol interception) is collected. After this, the device is used. The user tests and compares the sufficient amount of samples in sequence to obtain comparative data of multiple sets of sampling data at different times and spaces.

[0039] During the aforementioned single aerosol monitoring process, if the air velocity changes (taking an increase in air velocity as an example), the following operations are required: The control panel detects an increase in air velocity through four velocity monitors 7. Simultaneously, the control panel increases the power of the air pump 8 to accelerate air extraction, ensuring the same sampling volume. At the same time, due to the increased power of the air pump 8, the pressure inside the sample storage shell 9 increases. The control panel then controls the extension end of the electric push rod 11 to extend again. The extension end of the electric push rod 11 drives the first sliding shell 12 to move to the right, simultaneously compressing the outer airbag 13 and the inner airbag 14 again. Taking the inner airbag 14 as an example, the inner airbag... When the bladder 14 is compressed, the gas inside it gradually moves into the corresponding gas storage shell 15, thereby pushing the piston 16 inside the gas storage shell 15 to move to the left, compressing the spring between the gas storage shell 15 and the piston 16, increasing the gas pressure inside the inner bladder 14, thus ensuring the seal between the inner bladder 14 and the sample storage shell 9. At the same time, the user can read the gas pressure inside the inner bladder 14 according to the scale on the indicator bar 17, and judge the pressure inside the sample storage shell 9 based on the gas pressure inside the inner bladder 14. When the pressure inside the sample storage shell 9 is too high, manual intervention is performed (i.e., manually adjusting the power of the air pump 8) to prevent the monitoring filter membrane on the first sliding shell 12 from breaking due to excessive pressure inside the sample storage shell 9.

[0040] Example 2: Based on Example 1, such as Figure 3 , Figure 4 and Figures 7-9As shown, it also includes a circulation mechanism, which is disposed inside the sample storage shell 9. The circulation mechanism includes a separator sleeve 18, which is fixedly connected to the sample storage shell 9. The separator sleeve 18 is made of flexible material and only allows gas to pass through. A second sliding shell 19 is slidably connected inside the sample storage shell 9. The second sliding shell 19 is used to squeeze the separator sleeve 18. Several nozzles 20 are provided on the second sliding shell 19. The second sliding shell 19 is connected to a first air inlet pipe 21, which is slidably and sealed to the sample storage shell 9. The circulation mechanism also includes a fixing frame 22, which is fixedly connected to the second sliding shell 19 and is slidably and sealed to the sample storage shell 9. A threaded rod 23 is rotatably connected to the sample storage shell 9, and the threaded rod 23 is threadedly connected to the fixing frame 22.

[0041] In the above scheme, the separator sleeve 18 can intercept aerosols inside it, and the connection between the air pump 8 and the sample storage shell 9 is located inside the separator sleeve 18. Several nozzles 20 on the second sliding shell 19 are evenly distributed circumferentially, and the nozzles 20 never contact the separator sleeve 18 to ensure the impact force of the air sprayed by the nozzles 20 on the separator sleeve 18. The first air inlet pipe 21 is connected to the external air supply system, and the gas supplied by the external air supply system does not contain aerosols. For cost considerations, the air discharged from the first sliding shell 12 during the sampling and monitoring process can be transported through a pipeline and stored in the external air supply system. The threaded rod 23 is externally powered to drive the second sliding shell 19 to move back and forth through the fixed frame 22.

[0042] like Figure 2 and Figure 10 As shown, a second air inlet pipe 24 is fixedly connected to one side of the sampling tube 4, and all the sampling tubes 4 are connected by a connecting pipe 25. A solenoid valve is provided on the side of all the sampling tubes 4 near the axis of the rotating ring 3. An air baffle plate 26 is fixedly connected to the lower side of the pipe connecting the intermediate housing 6 and the air pump 8. The diameter of the air baffle plate 26 is larger than the diameter of the sampling tube 4, and it is used to block the sampling tube 4.

[0043] In the above scheme, there are four connecting tubes 25, and the four sampling tubes 4 and the four connecting tubes 25 are staggered (that is, the ports of the four sampling tubes 4 on the side closest to the axis of the rotating ring 3 are interconnected through the four connecting tubes 25 respectively), so as Figure 10 Taking the sampling tube 4 as an example, the solenoid valve inside the sampling tube 4 is located below the connection between the sampling tube 4 and the adjacent connecting pipe 25 (the solenoid valve is not shown in the figure). The second air inlet pipe 24 is also connected to the external air supply system. The baffle plate 26 is used to block the sampling tube 4. During the rotation of the four sampling tubes 4 with the rotating ring 3, it prevents the pipe connecting the transfer shell 6 and the air pump 8 from being directly opposite the sampling tube 4 (that is, the gas entering the pipe connecting the transfer shell 6 and the air pump 8 is all gas inside the transfer shell 6). The gas entering the transfer shell 6 through the sampling tube 4 first flows inside the transfer shell 6, thereby increasing the degree of gas disorder inside the transfer shell 6.

[0044] Specific workflow: In the preparation stage, the user first connects the external air supply system to the first air inlet pipe 21 and connects the threaded rod 23 to the external power source. During the above-mentioned single aerosol sampling and monitoring process, the aerosol flows through the pipeline to the separator sleeve 18 under the delivery of the air pump 8 until the air sampling baseline reaches the standard. Then, the user closes the solenoid valves on the four sampling pipes 4 and the air pump 8. At the same time, the user turns off the external power source of the rotating ring 3. Subsequently, the user connects the second air inlet pipe 24 to the external air supply system. The user starts the air pump 8, which works and delivers pure air from the external air supply system to the sampling pipes 4. Since the solenoid valves on the four sampling pipes 4 are closed at this time, the pure air replaces the residual external air in the four sampling pipes 4 through the four connecting pipes 25. The air pump 8 gradually pushes the residual air in the flow channel of this device to the detection filter membrane on the first sliding shell 12 through the pure air, thereby ensuring the accuracy of the data monitored by the detection filter membrane on the first sliding shell 12.

[0045] After the solenoid valves on the four sampling tubes 4 are closed, the user supplies pure air through the external air supply system via the first air inlet pipe 21 to the second sliding shell 19. The pure air entering the second sliding shell 19 impacts the separator sleeve 18 through the nozzle 20, and the external power of the threaded rod 23 drives it to rotate continuously. The threaded rod 23 drives the second sliding shell 19 to move back and forth left and right through the fixing frame 22. During the reciprocating movement of the second sliding shell 19, it squeezes the separator sleeve 18, causing it to deform. Combined with the impact of the pure air in the nozzle 20 on the separator sleeve 18, During the sampling and monitoring process, the aerosol adhering to the separator sleeve 18 is impacted and falls off. After the aerosol falls off, the airflow in the second sliding shell 19 drives the aerosol to move to the left until the aerosol comes into contact with and is intercepted by the detection filter membrane on the first sliding shell 12. This reduces the possibility of residual aerosol adhering to the device and improves the accuracy of the data monitored by the detection filter membrane on the first sliding shell 12. After a single sampling and monitoring is completed, the user drives the second sliding shell 19 to reset through the threaded rod 23. At this time, the use of the device is completed, and the user turns off the external power and external air supply system.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An online sampling and monitoring device for ultra-high flow rate aerosols, characterized by: The device includes a mounting frame (1), on which mirror-distributed monitoring tubes (2) are fixedly attached. A rotating ring (3) rotatably connects the mirror-distributed monitoring tubes (2). Several sampling tubes (4) are fixedly attached to the rotating ring (3), passing through the rotating ring (3). A fixing ring (5) fixes the several sampling tubes (4). A transfer shell (6) is fixedly attached to the mounting frame (1), rotatably connecting the transfer shell (6) to the fixing ring (5). The sampling tubes (4) are connected to the transfer shell. (6) Connected, a flow rate monitor (7) is provided on one side of the monitoring tube (2), an air pump (8) is fixedly connected to the transfer shell (6) through the mounting frame, the transfer shell (6) is connected to the air inlet of the air pump (8) through the pipe, a sample storage shell (9) is fixedly connected to the mounting frame (1), the sample storage shell (9) is connected to the air outlet of the air pump (8) through the pipe, an exhaust hole is provided on the sample storage shell (9), and a sealing mechanism is provided on the mounting frame (1) for changing the sealing state of the sample storage shell (9) according to the sampling situation; The sealing mechanism includes an electric push rod (11), which is fixed to the mounting frame (1). The telescopic end of the electric push rod (11) is fixed to a first sliding shell (12) through the mounting frame. A monitoring filter membrane is installed inside the first sliding shell (12). The first sliding shell (12) is slidably connected to the sample storage shell (9). The first sliding shell (12) is used to cover the exhaust hole on the sample storage shell (9). An outer air bladder (13) and an inner air bladder (14) are fixed to the side of the first sliding shell (12) near the sample storage shell (9). The sealing mechanism further includes two air storage shells (15), both of which are fixed to the first sliding shell (12). The two air storage shells (15) are respectively connected to the outer air bag (13) and the inner air bag (14). A piston (16) is slidably connected inside the air storage shell (15), and a spring is provided inside the air storage shell (15). The piston (16) is in contact with the spring inside the air storage shell (15). The distance between the outer airbag (13) and the sample storage shell (9) is less than the distance between the inner airbag (14) and the sample storage shell (9), and the elastic coefficient of the spring in the air storage shell (15) connected to the outer airbag (13) is greater than the elastic coefficient of the spring in the air storage shell (15) connected to the inner airbag (14).

2. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 1, characterized in that: Several sampling tubes (4) are evenly distributed circumferentially on the fixed ring (5), and the mounting frame (1) is provided with a drive module for driving the rotating ring (3) to rotate.

3. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 2, characterized in that: An electric rotating shaft (10) is provided inside the sample storage shell (9). A heating plate is provided on the outer surface of the electric rotating shaft (10). Several guide blocks arranged in a spiral shape are fixed on the electric rotating shaft (10).

4. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 3, characterized in that: The sealing mechanism also includes a pointer (17), which is fixed to the piston (16) in the air storage shell (15) that communicates with the inner air bladder (14), and the pointer (17) is provided with a scale.

5. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 4, characterized in that: It also includes a circulation mechanism, which is disposed inside the sample storage shell (9). The circulation mechanism includes a separator sleeve (18), which is fixed inside the sample storage shell (9). The separator sleeve (18) is made of flexible material and only allows gas to pass through. A second sliding shell (19) is slidably connected inside the sample storage shell (9). The second sliding shell (19) is used to squeeze the separator sleeve (18). A plurality of nozzles (20) are provided on the second sliding shell (19). The second sliding shell (19) is connected to a first air inlet pipe (21). The first air inlet pipe (21) is slidably and sealed to the sample storage shell (9).

6. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 5, characterized in that: The circulation mechanism also includes a fixed frame (22), which is fixedly connected to the second sliding shell (19). The fixed frame (22) is slidably connected to the sample storage shell (9). A threaded rod (23) is rotatably connected to the sample storage shell (9). The threaded rod (23) is threadedly connected to the fixed frame (22). The first air inlet pipe (21) is connected to the external air supply system. The gas supplied by the external air supply system does not contain aerosols. The air discharged from the first sliding shell (12) is connected to the external air supply system through a pipe.

7. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 6, characterized in that: A second air inlet pipe (24) is fixed to one side of the sampling tube (4), and all the sampling tubes (4) are connected by a connecting pipe (25). A solenoid valve is provided on the side of all the sampling tubes (4) near the axis of the rotating ring (3).

8. The ultra-high flow rate aerosol online sampling and monitoring device according to claim 7, characterized in that: A baffle plate (26) is fixed to the lower side of the pipe connecting the transfer shell (6) and the air pump (8). The diameter of the baffle plate (26) is larger than the diameter of the sampling tube (4) and is used to block the sampling tube (4).

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