An air sampling device for environmental monitoring

Abstract

The present invention relates to the technical field of environmental monitoring, and discloses an air sampling device for environmental monitoring, comprising a placement box and a fixed box, wherein the fixed box is fixedly connected to the outer wall of the placement box, a support plate is fixedly connected to the interior of the placement box, and a multi-mode sampling component for sampling air in multiple ways is arranged inside the placement box; the telescopic shafts of two micro electric gas rods are simultaneously started to move two worms to a meshing state with a worm gear, and two air samples at the same position are synchronously collected, so that the sample error caused by time difference or other factors can be reduced, and the real situation of the air at the position can be more accurately reflected, so as to provide more reliable data for environmental monitoring and analysis, and the air at the same position is simultaneously drawn into two sampling tubes, and the two samples obtained can be compared and analyzed, and the distribution and change of pollutants in the air can be better understood by comparing the difference between the two samples.

Description

Technical Field

[0001] The invention relates to the technical field of environmental monitoring, and in particular to an air sampling device for environmental monitoring. Background Art

[0002] Environmental monitoring is to determine the environmental quality (or pollution level) and its changing trend by measuring the representative values ​​of factors affecting environmental quality. With the development of industrialization and urbanization, air pollution is becoming increasingly serious, posing a huge threat to human health and the ecological environment. Therefore, accurate monitoring and evaluation of air quality has become an urgent need. Air sampling devices can analyze the concentration of pollutants in air samples by collecting them, providing a scientific basis for environmental management and pollution control.

[0003] However, there are some problems in the air sampling process of existing air sampling devices. Usually, existing air sampling devices use containers to directly collect air containing pollutants for testing, or use the same air sampling device to sample the air again after the pollutants are filtered out. However, when sampling air containing pollutants in this way, the pollutants are very likely to remain inside the sampling device, and when sampling the air after the pollutants are filtered out again, the remaining pollutants will cause the air after the pollutants are filtered out to be polluted, thereby causing errors in the comparison results of the air containing pollutants and the air after the pollutants are filtered out at the same position, affecting the accuracy of air monitoring. Therefore, it is necessary to provide an air sampling device for environmental monitoring to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide an air sampling device for environmental monitoring, which can effectively solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an air sampling device for environmental monitoring, comprising a placement box and a fixed box, the fixed box is fixedly connected to the outer wall of the placement box, the interior of the placement box is fixedly connected to a support plate, the interior of the placement box is provided with a multi-mode sampling component for sampling air in multiple ways, the multi-mode sampling component is provided with a filtering and removing component for filtering the sampled air and removing pollutants remaining on the inner wall of the sampling pipeline, and the interior of the placement box is symmetrically fixedly connected with an exhaust pipe.

[0006] As a further improvement of the above scheme, the multi-mode sampling assembly includes a sampling cylinder symmetrically fixedly connected to the inside of the support plate, a through groove is opened at the connection between the placement box and the fixed box, a sampling main pipe is fixedly connected to the inside of the fixed box, the sampling cylinder close to the fixed box is fixedly connected to sampling tube 1 and sampling tube 2 respectively, the ends of sampling tube 1 and sampling tube 2 away from the sampling cylinder are fixedly connected to the sampling main pipe, the interior of the sampling cylinder is slidably connected to a piston pad, the outer wall of the piston pad is fixedly connected to a piston rod, the end of the piston rod away from the piston pad passes through the interior of the sampling cylinder, and the end of the piston rod away from the piston pad is fixedly connected to a movable plate.

[0007] As a further improvement of the above scheme, the multi-mode sampling component also includes an adjusting screw symmetrically rotatably connected to the outer wall of the support plate, the movable plates are all threadedly connected to the outer wall of the adjusting screw, the inner wall of the placement box is fixedly connected to a driving motor, the output shaft of the driving motor is fixedly connected to a rotating rod, the inner wall of the placement box is symmetrically fixedly connected to a micro-electric pneumatic rod 1, the telescopic shaft of the micro-electric pneumatic rod 1 is fixedly connected to a connecting plate, the outer wall of the connecting plate is rotatably connected to a worm, the worm and the connecting plate are both slidably connected to the outer wall of the rotating rod, the outer wall of the adjusting screw is fixedly connected to a worm wheel, the inner wall of the placement box is symmetrically fixedly connected to a limiting rod, and the movable plates are slidably connected to the outer wall of the limiting rod.

[0008] As a further improvement of the above scheme, the filtering and cleaning component includes a rotating screw that is rotatably connected to the inside of a support plate, a sealing ring is fixedly connected to the side of the sampling main pipe close to the sampling tube, a movable screw sleeve is threadedly connected to the outer wall of the rotating screw, an end of the movable screw sleeve away from the support plate passes through the interior of the sampling main pipe and the sealing ring, a cleaning scraper is fixedly connected to the end of the movable screw sleeve away from the support plate, a threaded hole is provided at the end of the movable screw sleeve away from the support plate, a screw is threadedly connected to the inner part of the threaded hole, a mounting rod is fixedly connected to the outer wall of the screw, an activated carbon filter is fixedly connected to the end of the mounting rod away from the screw, the cleaning scraper and the activated carbon filter are both slidably connected to the interior of the sampling main pipe, the outer wall of the sampling main pipe is fixedly connected to the fixing rod, the outer wall of the movable screw sleeve is fixedly connected to the limiting plate, and the limiting plate is slidably connected to the outer wall of the fixing rod.

[0009] As a further improvement of the above scheme, the filtering and removing assembly also includes a rotating shaft rotatably connected to the outer wall of the support plate, the outer wall of the support plate is fixedly connected to a second micro-electric pneumatic rod, the telescopic shaft of the second micro-electric pneumatic rod is fixedly connected to a slide plate, the outer wall of the slide plate is rotatably connected to a second bevel gear, the slide plate and the second bevel gear are both slidably connected to the outer wall of the rotating shaft, the outer wall of the rotating rod is fixedly connected to a first bevel gear, and the rotating screw and the rotating shaft are connected by a belt drive.

[0010] As a further improvement of the above solution, the interiors of the second bevel gear and the worm are provided with limiting sliding grooves, and the outer walls of the rotating rod and the rotating shaft are fixedly connected with limiting convex strips.

[0011] As a further improvement of the above solution, the limiting sliding groove and the limiting convex strip are both in a cross shape.

[0012] As a further improvement of the above solution, the activated carbon filter and the cleaning scraper are both circular in shape, and the outer walls of the activated carbon filter and the cleaning scraper are in contact with the inner wall of the sampling main pipe.

[0013] As a further improvement of the above solution, solenoid valves are installed inside the sampling tube 1, the sampling tube 2 and the air outlet pipe, and the bottom ends of the air outlet pipes are fixedly connected to the sampling barrel.

[0014] As a further improvement of the above scheme, a built-in power supply is arranged inside the placement box, and a controller is arranged on the upper surface of the placement box. The built-in power supply and the controller are electrically controlled to switch on and off power, and the controller is electrically connected to the solenoid valve, the drive motor, the micro electric pneumatic rod 1 and the micro electric pneumatic rod 2.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the telescopic shafts of two micro electric gas rods are simultaneously started to move the two worms to the meshing state with the worm gear, the two adjusting screws can be rotated synchronously, and the moving plate, the piston rod and the piston pad can be moved and sucked by adjusting the thread of the screw. The piston pads inside the two sampling tubes can be synchronously moved and sucked to simultaneously sample two portions of air. By synchronously collecting two air samples at the same position, the two samples obtained can be compared and analyzed. By comparing the difference between the two samples, the sample error caused by time difference or other factors can be reduced, and the real situation of the air at the position can be more accurately reflected, providing more reliable data for environmental monitoring and analysis. When the activated carbon filter is installed in the sampling main pipe, the sampled air can be filtered and adsorbed by the installation of the activated carbon filter to remove pollutants in the air sample. After sampling the unfiltered air sample, the filtered air sample can also be sampled. By sampling air samples in different states, better comparative analysis can be performed, and by comparing the filtered air sample with the unfiltered air sample, the severity of air pollution can be more effectively compared. and the concentration of pollutants. Compared with a single direct sampling of the air, it can improve the diversity and flexibility of sample collection, and the removal scraper and the activated carbon filter are moved synchronously by moving the screw sleeve. Through the edge of the activated carbon filter and the sampling main pipe, the dust particles and pollutant particles remaining on the inner wall of the sampling main pipe due to sampling can be initially scraped out from the inside to the outside through the friction between the activated carbon filter and the sampling main pipe. The cross-section of the edge of the removal scraper is conical. When the edge of the removal scraper is in contact with the sampling main pipe, the edge of the removal scraper can scrape out the dust particles and pollutant particles remaining on the inner wall of the sampling main pipe due to sampling from the inside to the outside for a second time during the movement of the removal scraper, further improving the clean state of the inside of the sampling main pipe. By scraping out the dust particles and pollutant particles inside the sampling main pipe, the pollutant particles can be effectively prevented from polluting the filtered air sample when the filtered air sample is collected, so that the collected filtered air sample always remains in a filtered state, avoiding errors caused by pollutant contamination of the sample when the two samples are compared, and improving the accurate comparison effect of the two air sample detections;

[0017] 2. By starting the telescopic shafts of the two micro electric gas rods respectively, the two worms and worm wheels can be placed in two states of engagement and separation respectively, and the sampling cylinder corresponding to the meshing position of the worm and the worm wheel samples and draws air, while the sampling cylinder corresponding to the separation of the worm and the worm wheel is in a stationary state, so that one sampling cylinder can be in a state of air suction sampling and the other sampling cylinder can be in a stationary state, so that automatic separation and adjustment can be performed according to sampling needs. When one sampling cylinder is sampling air, the other sampling cylinder is in a stopped state, so that uninterrupted air sampling can be achieved, ensuring that air samples can be obtained at different time periods, thereby improving the continuity and integrity of sampling. After sampling the unfiltered air sample inside one of the sampling cylinders, the filtered air sample can be sampled inside the other outer sampling cylinder through the activated carbon filter installed in the sampling main pipe. When taking the filtered air sample, the solenoid valve inside the sampling tube 2 is automatically closed, while the solenoid valve inside the sampling tube 1 is automatically opened, and the air sample filtered by the activated carbon filter directly enters the sampling tube corresponding to the sampling tube 1. Therefore, the two sampling tubes can be used alternately as needed, so that the air at the same position can be sampled separately as unfiltered air samples and filtered air samples as needed, which is more convenient for detecting and comparing the air samples in two different states, and can further improve the accuracy of air detection and analysis by the staff.

[0018] 3. The telescopic shaft of the second micro-electric gas rod can be started to transmit the rotating screw. The power can be automatically transmitted to the rotating screw by starting the second micro-electric gas rod. Therefore, the movement of the cleaning scraper can be realized under the power transmission of the rotating screw. The movement of the cleaning scraper can scrape out the dust particles and pollutant particles remaining in the inner wall of the sampling main pipe, so as to maintain the cleanliness of the inside of the sampling main pipe and prevent the air sample after filtering from being polluted when it is collected. The rotation of the rotating screw can facilitate the removal of the cleaning scraper and the activated carbon filter from the sampling main pipe. The movement of the activated carbon filter from the sampling main pipe makes it easier to disassemble and replace the activated carbon filter. The installation of the activated carbon filter facilitates the collection of filtered air samples, and the disassembly of the activated carbon filter facilitates the collection of unfiltered air samples. Two different air samples can be collected according to whether the activated carbon filter is installed or disassembled, which effectively improves the air The convenience and flexibility of sample sampling. When it is necessary to continuously sample the filtered air samples, in order to ensure that the filtering effect of the air samples remains consistent, the activated carbon filter can be replaced regularly to effectively maintain the filtering effect when collecting the filtered air samples. The replacement of the activated carbon filter can better ensure the accuracy of the filtered air samples. When the activated carbon filter and the cleaning scraper are removed from the sampling main pipe, the edges of the activated carbon filter and the cleaning scraper conflict with the inner wall of the sampling main pipe, so that the edges of the activated carbon filter and the cleaning scraper can double scrape the residual pollutant particles on the inner wall of the sampling main pipe. The dust particles and pollutant particles inside the sampling main pipe can be scraped off, which can effectively prevent the residual pollutant particles from polluting the filtered air samples. The cleaning scraper and the activated carbon filter repeatedly scrape the inner wall of the sampling main pipe, which effectively improves the cleaning effect of the inner wall of the sampling main pipe, and further ensures the cleanliness of the filtered air samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the placement box of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the sampling tube of the present invention;

[0023] Figure 4It is a cross-sectional view of the internal structure of the placement box of the present invention;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle;

[0025] Figure 6 It is a schematic diagram of the structure of the sampling main pipe of the present invention;

[0026] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at B in the middle;

[0027] Figure 8 It is a schematic diagram of the structure of the filtering and removing component of the present invention;

[0028] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structure at C in the middle;

[0029] Fig.10 For the present invention Figure 8 A magnified schematic diagram of the structure at D in the middle;

[0030] Fig.11 It is a schematic diagram of the structure of the multi-mode sampling component of the present invention;

[0031] Fig.12 The present invention Fig.11 Enlarged schematic diagram of the structure at point E in the middle.

[0032] In the figure: 1. Placement box; 2. Fixing box; 3. Support plate;

[0033] 4. The multi-mode sampling assembly includes: 401, sampling tube; 402, sampling tube 1; 403, sampling tube 2; 404, sampling main tube; 405, piston pad; 406, piston rod; 407, moving plate; 408, adjusting screw rod; 409, driving motor; 410, rotating rod; 411, micro electric gas rod 1; 412, connecting plate; 413, worm; 414, worm wheel; 415, limit rod;

[0034] 5. The filtering and cleaning components include: 501, sealing ring; 502, rotating screw; 503, movable screw sleeve; 504, cleaning scraper; 505, mounting rod; 506, activated carbon filter; 507, fixing rod; 508, limiting plate; 509, rotating shaft; 510, bevel gear one; 511, micro electric gas rod two; 512, slide plate; 513, bevel gear two; 6, exhaust pipe; 7, limiting slide groove; 8, limiting convex strip. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 12 As shown, the present invention provides an embodiment: an air sampling device for environmental monitoring, comprising a placement box 1 and a fixed box 2, wherein the fixed box 2 is fixedly connected to the outer wall of the placement box 1, a support plate 3 is fixedly connected to the interior of the placement box 1, a multi-mode sampling component 4 for sampling air in multiple ways is arranged inside the placement box 1, a filtering and removing component 5 for filtering the sampled air and removing pollutants remaining on the inner wall of the sampling pipeline is arranged in the multi-mode sampling component 4, and an air outlet pipe 6 is symmetrically fixedly connected to the interior of the placement box 1;

[0037] The multi-mode sampling assembly 4 includes a sampling cylinder 401 symmetrically fixedly connected to the inside of the support plate 3, a through groove is provided at the connection between the placement box 1 and the fixed box 2, a sampling main pipe 404 is fixedly connected to the inside of the fixed box 2, and one end of the sampling cylinder 401 close to the fixed box 2 is fixedly connected to a sampling tube 1 402 and a sampling tube 2 403, respectively, and the ends of the sampling tube 1 402 and the sampling tube 2 403 away from the sampling cylinder 401 are fixedly connected to the sampling main pipe 404, the inside of the sampling cylinder 401 is slidably connected to a piston pad 405, the outer wall of the piston pad 405 is fixedly connected to a piston rod 406, the end of the piston rod 406 away from the piston pad 405 passes through the inside of the sampling cylinder 401, and the end of the piston rod 406 away from the piston pad 405 is fixedly connected to a movable plate 407;

[0038] The multi-mode sampling component 4 also includes an adjusting screw 408 symmetrically rotatably connected to the outer wall of the support plate 3, the movable plate 407 is threadedly connected to the outer wall of the adjusting screw 408, the inner wall of the placement box 1 is fixedly connected to a driving motor 409, the output shaft of the driving motor 409 is fixedly connected to a rotating rod 410, the inner wall of the placement box 1 is symmetrically fixedly connected to a micro-electric gas rod 411, the telescopic shaft of the micro-electric gas rod 411 is fixedly connected to a connecting plate 412, the outer wall of the connecting plate 412 is rotatably connected to a worm 413, the worm 413 and the connecting plate 412 are slidably connected to the outer wall of the rotating rod 410, the outer wall of the adjusting screw 408 is fixedly connected to a worm wheel 414, the inner wall of the placement box 1 is symmetrically fixedly connected to a limiting rod 415, and the movable plate 407 is slidably connected to the outer wall of the limiting rod 415;

[0039] Specifically, the air at the same position is simultaneously drawn into two sampling tubes 401 through the multi-mode sampling component 4, and the two samples obtained can be compared and analyzed. By comparing the differences between the two samples, the distribution and changes of pollutants in the air can be better understood, which helps to discover potential problems and anomalies. By collecting two samples at the same time, the data can be verified against each other. If the results of the two samples are similar, the reliability of the data will be enhanced. If there are differences between the two samples, the reasons can be further analyzed to find possible interference factors or sampling errors. Synchronous sampling can reduce sampling time and workload, and avoid repeated operations and errors that may be caused by multiple sampling.

[0040] The filtering and removing component 5 includes a rotating screw 502 rotatably connected to the inside of the support plate 3, a sealing ring 501 is fixedly connected to the side of the sampling main pipe 404 close to the sampling tube 401, a movable screw sleeve 503 is threadedly connected to the outer wall of the rotating screw 502, and the end of the movable screw sleeve 503 away from the support plate 3 passes through the inside of the sampling main pipe 404 and the sealing ring 501, and the end of the movable screw sleeve 503 away from the support plate 3 is fixedly connected to a removing scraper 504, and a threaded hole is provided at the end of the movable screw sleeve 503 away from the support plate 3, and a screw is threadedly connected to the inner part of the threaded hole, and a mounting rod 505 is fixedly connected to the outer wall end of the screw, and an activated carbon filter screen 506 is fixedly connected to the end of the mounting rod 505 away from the screw, and the removing scraper 504 and the activated carbon filter screen 506 are both slidably connected to the inside of the sampling main pipe 404, and a fixing rod 507 is fixedly connected to the outer wall of the sampling main pipe 404, and a limiting plate 508 is fixedly connected to the outer wall of the movable screw sleeve 503, and the limiting plate 508 is slidably connected to the outer wall of the fixing rod 507;

[0041] The filter cleaning component 5 also includes a rotating shaft 509 rotatably connected to the outer wall of the support plate 3, the outer wall of the support plate 3 is fixedly connected to a second micro-electric gas rod 511, the telescopic shaft of the second micro-electric gas rod 511 is fixedly connected to a slide plate 512, the outer wall of the slide plate 512 is rotatably connected to a second bevel gear 513, the slide plate 512 and the second bevel gear 513 are both slidably connected to the outer wall of the rotating shaft 509, the outer wall of the rotating rod 410 is fixedly connected to a first bevel gear 510, and the rotating screw 502 and the rotating shaft 509 are connected by a belt drive;

[0042] Specifically, the installation of the activated carbon filter 506 by the filtering and removing component 5 can be used to sample the air into two different samples, one of which is an unfiltered sample, and the other is an air sample after the pollutants in the air are adsorbed and removed. By collecting air samples with pollutants and air samples without pollutants respectively, the air quality status can be more comprehensively understood. For the analysis of air samples with pollutants, the type, concentration and source of pollutants can be determined, providing a basis for pollution control, while the analysis of air samples without pollutants can be used as a background value for comparison, so as to more accurately evaluate the quality of the air. The pollution degree and treatment effect are determined by the activated carbon filter 506 which moves synchronously with the cleaning scraper 504 and can scrape the inner wall of the sampling main pipe 404 again on the basis of the scraping of the cleaning scraper 504. The cleaning scraper 504 and the activated carbon filter 506 can effectively scrape the inner wall of the sampling main pipe 404 twice, and the pollutants remaining on the inner wall of the sampling main pipe 404 can be scraped off, which can reduce the interference of pollutants on subsequent sampling, thereby improving the accuracy of sampling, ensuring that the samples taken each time can more truly reflect the air conditions at that time, and providing more reliable data for environmental monitoring.

[0043] A built-in power supply is provided inside the placement box 1, and a controller is provided on the upper surface of the placement box 1. The built-in power supply and the controller are electrically connected and disconnected through electrical control, and the controller is electrically connected to the solenoid valve, the drive motor 409, the micro electric gas rod 1 411 and the micro electric gas rod 2 511;

[0044] Reference Figure 3 , Figure 8 , Fig.10 , Fig.11 and Fig.12 As shown, the interior of the bevel gear 513 and the worm 413 are provided with a limiting sliding groove 7, and the outer wall of the rotating rod 410 and the rotating shaft 509 are fixedly connected with the limiting convex strip 8;

[0045] The limiting slide groove 7 and the limiting convex strip 8 are both in the shape of a cross;

[0046] Reference Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the activated carbon filter 506 and the cleaning scraper 504 are both circular in shape, and the outer walls of the activated carbon filter 506 and the cleaning scraper 504 are in contact with the inner wall of the sampling main pipe 404;

[0047] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, solenoid valves are installed inside the sampling tube 1 402, the sampling tube 2 403 and the air outlet pipe 6, and the bottom end of the air outlet pipe 6 is fixedly connected to the sampling cylinder 401;

[0048] In combination with the above preferred embodiments, the working principle of the present invention is as follows:

[0049] In the initial state, the solenoid valves inside sampling tube 1 402 and sampling tube 2 403 are in a closed state, the piston pad 405 is close to the sampling main tube 404, the telescopic shaft of the micro electric pneumatic rod 1 411 is in a retracted state, the worm 413 and the worm gear 414 are in a separated state, the telescopic shaft of the micro electric pneumatic rod 2 511 is in a retracted state, the bevel gear 2 513 and the bevel gear 1 510 are in a separated state, and the activated carbon filter 506 is not installed.

[0050] When working:

[0051] The staff electrically controls the telescopic shaft of the two micro electric gas rods 411 through the controller to extend and drive the connecting plate 412 fixedly connected thereto to move. The movement of the connecting plate 412 drives the worm 413 rotatably connected thereto to move to a meshing state with the worm wheel 414. Then, the driving motor 409 is started to drive the rotating rod 410 fixedly connected thereto to rotate. The rotating rod 410 drives the limiting convex strip 8 fixedly connected thereto to rotate. The blocking force generated by the cross shape of the limiting slide groove 7 and the limiting convex strip 8 drives the worm 413 to rotate synchronously. The rotation of the worm 413 drives the worm wheel 414 meshing therewith to rotate. The rotation of the worm wheel 414 drives the adjusting screw 408 fixedly connected thereto to rotate synchronously. When the adjusting screw 408 rotates, the movable plate 407 can slide through the thread on the surface. The sliding of the movable plate 407 drives the piston rod 406 fixedly connected thereto to move. The movement of 06 drives the piston pad 405 fixedly connected thereto to move inside the sampling cylinder 401, and the movement of the piston pad 405 can generate negative pressure suction inside the sampling cylinder 401, and the suction simultaneously draws the external air to be sampled into the interior of the sampling cylinder 401 through the sampling tube 1 402, the sampling tube 2 403 and the sampling main tube 404, and draws the air at the same position into the two sampling cylinders 401 at the same time, and the obtained two samples can be compared and analyzed. By comparing the difference between the two samples, the distribution and changes of pollutants in the air can be better understood, which is helpful to find potential problems and abnormalities. By collecting two samples at the same time, the data can be mutually verified. If the results of the two samples are similar, the reliability of the data will be enhanced. If there are differences between the two samples, the reasons can be further analyzed to find possible interference factors or sampling errors.

[0052] When it is necessary to draw a sample from one of the sampling tubes 401, one of the micro-electric air rods 411 can be controlled to start up, so that one of the two groups of worms 413 and worm wheels 414 is in a meshing state and the other is in a separated state. Therefore, it is possible to collect an air sample from one of the sampling tubes 401 separately. The air can be drawn simultaneously or separately by the two sampling tubes 401, which increases the overall sampling speed. Compared with a single sampling tube 401, more air samples can be collected in the same time, thereby improving work efficiency. By using two sampling tubes 401 to draw air separately, two independent groups of samples can be obtained. By comparing and analyzing the two groups of samples, the characteristics of the air and the presence of pollutants can be more accurately understood. Distribution, for example, the difference in air quality at different locations, at different times or under different environmental conditions can be compared. According to specific monitoring needs, the working modes of the two sampling cylinders 401 can be flexibly arranged. For example, one sampling cylinder 401 can be used for routine monitoring, and the other sampling cylinder 401 can be used for monitoring specific pollutants or special situations, or one sampling cylinder 401 can be used for sampling at one location, and the other sampling cylinder 401 can be used for sampling at another location at the same time, so as to realize multi-point synchronous monitoring. When one of the sampling cylinders 401 has a problem, it can be inspected and repaired separately without affecting the normal operation of the other sampling cylinder 401, which can reduce sampling interruptions caused by equipment failures and ensure the continuity of monitoring work;

[0053] By rotating the activated carbon filter 506, the mounting rod 505 fixedly connected thereto is driven to rotate synchronously, and the mounting rod 505 drives the screw fixedly connected thereto to be threadedly connected inside the screw hole, so that the activated carbon filter 506 can be quickly installed and replaced. The installation of the activated carbon filter 506 can be used to sample the air into two different samples, one of which is an unfiltered sample, and the other is an air sample after the pollutants in the air are adsorbed and removed. By collecting air samples with pollutants and air samples without pollutants respectively, the quality of the air can be more comprehensively understood. For the analysis of air samples with pollutants, the type, concentration and source of pollutants can be determined to provide a basis for pollution control. For the analysis of air samples without pollutants, it can be used as a background value for comparison to more accurately evaluate the degree of pollution and the control effect. By comparing air samples with pollutants and air samples without pollutants, the source of pollutants can be more accurately analyzed, so that the installation and non-installation of the activated carbon filter 506 can achieve the effect of sampling two different air at the same position.

[0054] The telescopic shaft of the micro-electric gas rod 2 511 is electrically controlled by the controller to start the slide plate 512 fixedly connected thereto to move, and the movement of the slide plate 512 drives the bevel gear 2 513 connected thereto to move and engage with the bevel gear 1 510, and the rotation of the rotating rod 410 drives the bevel gear 1 510 fixedly connected thereto to rotate, and the bevel gear 1 510 drives the bevel gear 2 513 engaged therewith to rotate, and the rotation of the bevel gear 2 513 drives the bevel gear 1 510 to rotate synchronously through the blocking force generated by the cross-shaped limiting slide groove 7 and the limiting convex strip 8, and the rotation of the bevel gear 1 510 drives the rotating screw rod 502 to rotate synchronously through the belt, and the rotation of the rotating screw rod 502 causes the moving screw sleeve 503 to move through the thread, and when the rotating screw rod 502 rotates, it slides on the fixed rod 5 through the limiting plate 508 The outer wall of 07 can limit the movable screw sleeve 503 and keep the movable screw sleeve 503 sliding horizontally, and the movement of the movable screw sleeve 503 drives the cleaning scraper 504 fixedly connected thereto to move synchronously inside the sampling main pipe 404, and the movement of the cleaning scraper 504 drives the mounting rod 505 and the activated carbon filter 506 to move synchronously in the sampling main pipe 404, and the outer wall of the cleaning scraper 504 conflicts with the inner wall of the sampling main pipe 404, so that when the cleaning scraper 504 moves, the pollutants remaining on the inner wall of the sampling main pipe 404 can be scraped off, and the scraped pollutants are pushed out of the sampling main pipe 404 by the cleaning scraper 504, so that the pollutants can be prevented from remaining on the inner wall of the sampling main pipe 404, and the effect of effectively preventing the filtered air sample from being contaminated by the pollutants when sampling is performed;

[0055] The activated carbon filter 506 moves synchronously with the cleaning scraper 504, and can scrape the inner wall of the sampling main pipe 404 again on the basis of the scraping of the cleaning scraper 504. The cleaning scraper 504 and the activated carbon filter 506 can effectively scrape the inner wall of the sampling main pipe 404 twice, and the pollutants remaining on the inner wall of the sampling main pipe 404 can be scraped off, which can reduce the interference of pollutants on subsequent sampling, thereby improving the accuracy of sampling, ensuring that each sample can more truly reflect the air conditions at that time, and providing more reliable data for environmental monitoring. Timely removal of pollutants on the inner wall of the sampling main pipe 404 can reduce these pollution. At the same time, it also helps to maintain the good operating condition of the equipment and reduce the possibility of failure. It can more conveniently replace the activated carbon filter 506, which means that the failed or blocked activated carbon filter 506 can be replaced in time to ensure the normal operation of the air sampling device. This can avoid the reduction of sampling efficiency or data errors caused by problems with the activated carbon filter 506, thereby reducing the maintenance cost of the equipment, effectively removing pollutants in the sampling main pipe 404, and avoiding the possible secondary release and diffusion of these pollutants, which has positive significance for environmental protection.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air sampling device for environmental monitoring, comprising a placement box (1) and a fixing box (2), wherein the fixing box (2) is fixedly connected to the outer wall of the placement box (1), characterized in that: The interior of the placement box (1) is fixedly connected to a support plate (3), the interior of the placement box (1) is provided with a multi-mode sampling assembly (4) for sampling air in multiple ways, the multi-mode sampling assembly (4) is provided with a filtering and removing assembly (5) for filtering the sampled air and removing pollutants remaining on the inner wall of the sampling pipeline at the same time, and the interior of the placement box (1) is symmetrically fixedly connected to an air outlet pipe (6); The multi-mode sampling assembly (4) comprises a sampling cylinder (401) symmetrically fixedly connected to the inside of the support plate (3); a through groove is provided at the connection between the placement box (1) and the fixed box (2); a sampling main pipe (404) is fixedly connected to the inside of the fixed box (2); one end of the sampling cylinder (401) close to the fixed box (2) is fixedly connected to a sampling tube 1 (402) and a sampling tube 2 (403), respectively; one end of the sampling tube 1 (402) and the sampling tube 2 (403) away from the sampling cylinder (401) is fixedly connected to the sampling main pipe (404); the inside of the sampling cylinder (401) is slidably connected to a piston pad (405); the outer wall of the piston pad (405) is fixedly connected to a piston rod (406); the end of the piston rod (406) away from the piston pad (405) passes through the inside of the sampling cylinder (401); and the end of the piston rod (406) away from the piston pad (405) is fixedly connected to a movable plate (407); The filtering and cleaning component (5) comprises a rotating screw (502) rotatably connected to the inside of the support plate (3); a sealing ring (501) is fixedly connected to the side of the sampling main pipe (404) close to the sampling tube (401); a movable screw sleeve (503) is threadedly connected to the outer wall of the rotating screw (502); an end of the movable screw sleeve (503) away from the support plate (3) penetrates the inside of the sampling main pipe (404) and the sealing ring (501); an end of the movable screw sleeve (503) away from the support plate (3) is fixedly connected to a cleaning scraper (504); and the movable screw sleeve (503) away from the support plate ( 3) is provided with a threaded hole at one end, a screw is connected to the inner thread of the threaded hole, a mounting rod (505) is fixedly connected to the outer wall of the screw, an activated carbon filter (506) is fixedly connected to the end of the mounting rod (505) away from the screw, the cleaning scraper (504) and the activated carbon filter (506) are both slidably connected to the inside of the sampling main pipe (404), a fixing rod (507) is fixedly connected to the outer wall of the sampling main pipe (404), and a limiting plate (508) is fixedly connected to the outer wall of the movable screw sleeve (503), and the limiting plate (508) is slidably connected to the outer wall of the fixing rod (507).

2. An air sampling device for environmental monitoring according to claim 1, characterized in that: The multi-mode sampling assembly (4) further comprises an adjusting screw (408) symmetrically rotatably connected to the outer wall of the support plate (3); the movable plate (407) is threadedly connected to the outer wall of the adjusting screw (408); the inner wall of the placement box (1) is fixedly connected to a driving motor (409); the output shaft of the driving motor (409) is fixedly connected to a rotating rod (410); the inner wall of the placement box (1) is symmetrically fixedly connected to a micro electric gas rod (411); the micro electric gas rod (411) is fixedly connected to the inner wall of the placement box (1); The telescopic shafts of the mounting plate (411) are fixedly connected to a connecting plate (412), the outer wall of the connecting plate (412) is rotatably connected to a worm (413), the worm (413) and the connecting plate (412) are slidably connected to the outer wall of the rotating rod (410), the outer wall of the adjusting screw (408) is fixedly connected to a worm wheel (414), the inner wall of the placement box (1) is symmetrically fixedly connected to a limit rod (415), and the movable plate (407) is slidably connected to the outer wall of the limit rod (415).

3. An air sampling device for environmental monitoring according to claim 2, characterized in that: The filtering and removing component (5) further comprises a rotating shaft (509) rotatably connected to the outer wall of the support plate (3); the outer wall of the support plate (3) is fixedly connected to a second micro-electric pneumatic rod (511); the telescopic shaft of the second micro-electric pneumatic rod (511) is fixedly connected to a slide plate (512); the outer wall of the slide plate (512) is rotatably connected to a second bevel gear (513); the slide plate (512) and the second bevel gear (513) are both slidably connected to the outer wall of the rotating shaft (509); the outer wall of the rotating rod (410) is fixedly connected to a first bevel gear (510); and the rotating screw (502) and the rotating shaft (509) are connected via a belt drive.

4. An air sampling device for environmental monitoring according to claim 3, characterized in that: The interiors of the second bevel gear (513) and the worm gear (413) are both provided with limit sliding grooves (7), and the outer walls of the rotating rod (410) and the rotating shaft (509) are both fixedly connected with limit convex strips (8).

5. An air sampling device for environmental monitoring according to claim 4, characterized in that: The limiting sliding groove (7) and the limiting convex strip (8) are both in the shape of a cross.

6. The air sampling device for environmental monitoring according to claim 1, characterized in that: The activated carbon filter (506) and the cleaning scraper (504) are both circular in shape, and the outer walls of the activated carbon filter (506) and the cleaning scraper (504) are in contact with the inner wall of the sampling main pipe (404).

7. The air sampling device for environmental monitoring according to claim 1, characterized in that: Solenoid valves are installed inside the sampling tube 1 (402), the sampling tube 2 (403) and the air outlet pipe (6), and the bottom end of the air outlet pipe (6) is fixedly connected to the sampling cylinder (401).

8. An air sampling device for environmental monitoring according to claim 4, characterized in that: The placement box (1) is provided with a built-in power supply inside, and a controller is provided on the upper surface of the placement box (1). The built-in power supply and the controller are electrically connected and disconnected through electrical control, and the controller is electrically connected to the solenoid valve, the drive motor (409), the first micro electric pneumatic rod (411), and the second micro electric pneumatic rod (511).

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