An atmospheric volatile organic compound sampling device for ecological environment monitoring

Abstract

The present invention provides an atmospheric volatile organic compound sampling device for ecological environment monitoring, which relates to the technical field of environmental monitoring. It comprises a mounting base, the top of which is fixedly connected with a collecting shell, the collecting shells are vertically arranged in three groups, which are respectively the first collecting shell, the second collecting shell and the third collecting shell from bottom to top, and two adjacent collecting shells are fixedly connected, the collecting shells are connected with a sampler through a hose, the sampler is fixedly connected to the mounting base, a servo motor is fixedly connected in the mounting base, and a threaded rod is fixedly connected to the output shaft of the servo motor. The present invention can not only collect air samples at different heights when conducting ecological environment monitoring by arranging a collecting shell, a threaded rod and an extraction component, but also keep the sample pure in the process of collecting the sample, avoid the sample from being contaminated in the process of collecting, and make the detection result of the sample more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of environmental monitoring, and in particular to an atmospheric volatile organic matter sampling device for ecological environment monitoring. Background Art

[0002] Atmospheric volatile organic compounds are a class of organic compounds that have high saturated vapor pressure, low boiling point, small molecular weight, and are easy to volatilize at room temperature. They are one of the main pollutants in the atmosphere and have important impacts on the environment and human health. Therefore, when conducting ecological environment monitoring, it is necessary to detect atmospheric volatile organic compounds in the air.

[0003] When conducting ecological environment monitoring, it is necessary to collect a certain volume of air samples and analyze the atmospheric volatile organic compounds in the samples in order to estimate the proportion of atmospheric volatile organic compounds in the air. When collecting air samples, it is inconvenient for operators to collect air samples at different heights, and the operation is cumbersome, which delays the efficiency of sample collection. In addition, when collecting air samples at different heights, it is easy for the air at different heights to mix, resulting in cross-fusion of the collected samples, making the detection results inaccurate. Therefore, the present application provides an atmospheric volatile organic compound sampling device for ecological environment monitoring to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an atmospheric volatile organic compound sampling device for ecological environment monitoring to solve the problems of complicated operation, time delay and easy mixing of gases collected at different heights during the existing air collection process for operators.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] An atmospheric volatile organic compound sampling device for ecological environment monitoring comprises a mounting base, a collecting shell is fixedly connected to the top of the mounting base, three groups of collecting shells are vertically arranged, namely, a first collecting shell, a second collecting shell and a third collecting shell from bottom to top, two adjacent collecting shells are fixedly connected, the collecting shells are connected to a sampler through a hose, the sampler is fixedly connected to the mounting base, a servo motor is fixedly connected in the mounting base, a threaded rod is fixedly connected to the output shaft of the servo motor, the threaded rod is rotatably connected to the three groups of collecting shells, an extraction component is slidably connected in the collecting shell, the extraction component is used to cooperate with the collecting shell to extract air samples in the corresponding area, the sampler is used to process the air samples in the collecting shells, and the mounting base is detachably connected to a transport vehicle through fixing plates on both sides.

[0007] Optionally, a one-way valve air inlet is fixedly connected to one side of the top of the collecting shell, an air outlet is provided on the other side of the top of the collecting shell, the air outlet is connected to the air inlet on the sampler through a hose, and a support tube is fixedly connected to the bottom of the collecting shell.

[0008] Optionally, the interior of the collecting shell is a hollow structure, a circular array of slide rails is arranged on the inner wall of the hollow cavity in the collecting shell, an exhaust hole is opened at the bottom of the hollow cavity in the collecting shell, and a vertically arranged rotating groove is opened on the collecting shell, and the diameter of the rotating groove is the same as the aperture of the supporting tube.

[0009] Optionally, two adjacent collection shells are fixedly connected via a support tube, the central axes of the three support tubes coincide, and the tops of the hollow cavities of the two collection shells located in the middle and the bottom are provided with first magnets in an annular array.

[0010] Optionally, a second spiral pattern is provided on the threaded rod, a third spiral pattern is provided above the second spiral pattern, and a first spiral pattern is provided below the second spiral pattern. The bottom end of the threaded rod is fixedly connected to a first gear. The first spiral pattern, the second spiral pattern and the third spiral pattern are respectively rotatably connected in the cavities of three groups of collecting shells. The bottom of the first spiral pattern is flush with the bottom of the first collecting shell cavity, the height of the top of the first spiral pattern is lower than the height of the top of the first collecting shell cavity, the position of the second spiral pattern is located in the middle of the second collecting shell cavity, the top of the third spiral pattern is flush with the top of the third collecting shell cavity, and the position of the bottom of the third spiral pattern is higher than the position of the bottom of the third collecting shell cavity.

[0011] Optionally, a detection chamber is provided in the sampler, and a sensor is provided on the side wall of the detection chamber of the sampler, and the sensor is used to detect atmospheric volatile organic compounds in the air. The bottom of the sampler is rotatably connected to a second gear, and the top of the second gear is connected to a cleaning head through a fixed rod. The second gear is meshed with a small gear at the bottom of the gear shaft through a chain, and the large gear at the top of the gear shaft is meshed with the first gear through a chain, and the diameter of the second gear is larger than the diameter of the first gear.

[0012] Optionally, the extraction assembly includes an extraction plate and a threaded sleeve, the threaded sleeve is fixedly connected to the middle position of the extraction plate, the height of the threaded sleeve is greater than the thickness of the extraction plate, the extraction plate is located in the middle position of the threaded sleeve, and the extraction plate and the threaded sleeve are both provided in three groups.

[0013] Optionally, a circular array of sliding grooves is provided around the extraction plate, the upper surfaces of the two extraction plates located in the middle and the bottom are fixedly connected with the second magnets in the circular array, and the two threaded sleeves located in the middle and the bottom are fixedly connected with the trigger tube.

[0014] Optionally, the extraction plate and the collection shell are slidably connected via a slide groove and a slide rail, the position and quantity of the second magnet correspond one-to-one to the first magnet, the trigger cylinder is slidably connected in the support cylinder, a threaded rod is rotatably connected in the trigger cylinder, and the length of the trigger cylinder is greater than the length of the support cylinder.

[0015] Optionally, the threaded sleeve located at the top is threadedly connected to the third spiral pattern, and the distance between the third spiral pattern and the bottom of the third collecting shell cavity is the same as the height of the threaded sleeve; the threaded sleeve located at the bottom is threadedly connected to the first spiral pattern, and the distance between the first spiral pattern and the top of the first collecting shell cavity is the same as the height of the threaded sleeve; the threaded sleeve located in the middle is threadedly connected to the second spiral pattern, and the distances between the second spiral pattern and the top and bottom of the second collecting shell cavity are the same as the height of the threaded sleeve.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting up multiple groups of collection shells arranged vertically up and down, air samples at different heights can be collected during ecological environment monitoring. At the same time, during the sampling process, large-scale operations are avoided, so that the air can be more stable, and the mixing of air at different heights is avoided, making the sample detection process more accurate.

[0018] By setting up threaded rods and extraction components, when conducting ecological environment monitoring, collection shells at different heights can collect air samples at different times, and before collection, the gas in the collection shell can be discharged to make the gas collected by the collection shell purer, avoiding the situation where the air in the collection shell affects the sample.

[0019] By setting up a collection shell and an extraction component, after the collection shell collects the sample, the sample in each collection shell can automatically enter the sampler at different times, so that the sampler can detect and analyze the air sample in each collection shell at different times, thereby avoiding the mixing of the collected gas in the sampler and cross contamination. Furthermore, by setting a cleaning head in the sampler, the detection head of the sensor can be kept clean, avoiding dust and other substances in the air from adhering to the detection head, keeping the sensor clean, and making the detection result of the sampler more accurate.

[0020] By setting up a collection shell, a threaded rod and an extraction component, when conducting ecological environment monitoring, not only can air samples at different heights be collected, but the purity of the samples can also be maintained during the sample collection process to avoid the samples being contaminated during the collection process, making the sample detection results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of an atmospheric volatile organic compound sampling device for ecological environment monitoring;

[0023] Figure 2 It is a partial structural schematic diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the three groups of collecting shells connected in the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the collection shell of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the connection between the collecting shell and the threaded rod of the present invention;

[0027] Figure 6 It is a schematic diagram of the threaded rod structure of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the connection between the threaded rod and the extraction assembly of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the extraction component of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the connection between the extraction component and the collection shell of the present invention;

[0031] Fig.10 A bottom view of the present invention;

[0032] Fig.11 It is a structural schematic diagram of the sampling machine of the present invention;

[0033] Fig.12 It is a schematic diagram of the internal structure of the sampling machine of the present invention;

[0034] Fig.13 It is a schematic structural diagram of the second gear of the present invention.

[0035] Reference numerals:

[0036] 1. Mounting base; 2. Sampler; 21. Second gear; 211. Fixing rod; 212. Cleaning head; 22. Gear shaft; 23. Sensor; 3. Collecting shell; 31. One-way valve air inlet; 311. Slide rail; 312. Rotating groove; 313. Exhaust hole; 314. First magnet; 32. Air outlet; 33. Support cylinder; 4. Servo motor; 41. Threaded rod; 411. First spiral pattern; 412. Second spiral pattern; 413. Third spiral pattern; 42. First gear; 5. Extraction assembly; 51. Extraction plate; 511. Slide groove; 512. Second magnet; 52. Threaded sleeve; 521. Trigger cylinder.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The following is a detailed description of an atmospheric volatile organic compound sampling device for ecological environment monitoring provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0039] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0042] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0043] like Figures 1 to 5 As shown, an embodiment of the present invention provides an atmospheric volatile organic compound sampling device for ecological environment monitoring, including a mounting base 1, a collecting shell 3 is fixedly connected to the top of the mounting base 1, and the collecting shell 3 is vertically arranged in three groups, which are respectively the first collecting shell, the second collecting shell and the third collecting shell from bottom to top. Two adjacent collecting shells 3 are fixedly connected, and the collecting shells 3 are connected to a sampler 2 through a hose. The sampler 2 is fixedly connected to the mounting base 1, and a servo motor 4 is fixedly connected in the mounting base 1. A threaded rod 41 is fixedly connected to the output shaft of the servo motor 4, and the threaded rod 41 is rotatably connected to the three groups of collecting shells 3. An extraction component 5 is slidably connected in the collecting shell 3, and the extraction component 5 is used to cooperate with the collecting shell 3 to extract air samples in the corresponding area. The sampler 2 is used to process the air samples in the collecting shell 3, and the mounting base 1 is detachably connected to the mounting base 1 through the fixing plates on both sides. On the transport vehicle, when in use, the operator needs to first fix the mounting base 1 to the transport vehicle with bolts, and move the transport vehicle to the sampling area, and then the operator controls the rotation of the servo motor 4 to rotate the threaded rod 41. When the threaded rod 41 rotates, the extraction component 5 moves downward in the collection shell 3. During the movement of the extraction component 5, part of the air at the corresponding height will be sucked into the collection shell 3. After the corresponding volume of air sample is collected in the collection shell 3, the operator controls the servo motor 4 to rotate in the opposite direction. At this time, the extraction component 5 will move in the opposite direction in the collection shell 3, and at the same time, the air sample in the collection shell 3 will be discharged into the sampler 2 through the hose. The air samples in different collection shells 3 are collected and detected separately by the sampler 2. Finally, the operator only needs to observe the data analysis on the display screen of the sampler 2.

[0044] As an implementation method in this embodiment, Figures 1 to 7 As shown, one side of the top of the collecting shell 3 is fixedly connected with a one-way valve air inlet 31, and the other side of the top of the collecting shell 3 is provided with an air outlet 32, and the air outlet 32 ​​is connected to the air inlet on the sampler 2 through a hose, and the bottom of the collecting shell 3 is fixedly connected with a support tube 33, and the interior of the collecting shell 3 is a cavity structure, and a circular array of slide rails 311 are provided on the inner wall of the cavity in the collecting shell 3, and an exhaust hole 313 is provided at the bottom of the cavity in the collecting shell 3, and a vertically arranged rotating groove 312 is provided on the collecting shell 3, and the diameter of the rotating groove 312 is the same as the aperture of the supporting tube 33, and a second The spiral pattern 412, the third spiral pattern 413 is arranged above the second spiral pattern 412, and the first spiral pattern 411 is arranged below the second spiral pattern 412. The extraction component 5 includes an extraction plate 51 and a threaded sleeve 52. The threaded sleeve 52 is fixedly connected to the middle position of the extraction plate 51. The height of the threaded sleeve 52 is greater than the thickness of the extraction plate 51. The extraction plate 51 is located in the middle position of the threaded sleeve 52. The extraction plate 51 and the threaded sleeve 52 are both provided with three groups. The extraction plate 51 is provided with a circular array of slide grooves 511 around it. The extraction plate 51 and the collection shell 3 slide through the slide grooves 511 and the slide rails 311. The threaded sleeve 52 at the top is threadedly connected to the third spiral pattern 413, the threaded sleeve 52 at the bottom is threadedly connected to the first spiral pattern 411, and the threaded sleeve 52 at the middle is threadedly connected to the second spiral pattern 412. When the servo motor 4 rotates, the threaded rod 41 is driven to rotate through the output shaft. When the threaded rod 41 rotates, the extraction plate 51 threadedly connected to the first spiral pattern 411, the second spiral pattern 412 and the third spiral pattern 413 will gradually descend in the collection shell 3 under the action of the slide rail 311. When the extraction plate 51 descends, the extraction plate 51 As the distance between the extraction plate 51 and the top of the cavity in the collecting shell 3 gradually increases, part of the air at the height of the collecting shell 3 will enter the collecting shell 3 through the one-way valve air inlet 31. When the extraction plate 51 reaches the bottom of the cavity of the collecting shell 3, the operator controls the servo motor 4 to rotate in the opposite direction. At this time, the threaded rod 41 will rotate in the opposite direction under the action of the servo motor 4, and make the extraction plate 51 gradually rise in the collecting shell 3. At this time, the extraction plate 51 will squeeze the air in the cavity of the collecting shell 3, and discharge the air in the cavity of the collecting shell 3 into the sampler 2 through the air outlet 32, and the air will be collected and detected by the sampler 2.

[0045] In this embodiment, if Figures 1 to 7As shown, during the use of the one-way valve air inlet 31, when the extraction plate 51 moves downward in the collecting shell 3, the outside air can enter the collecting shell 3 through the one-way valve air inlet 31, and when the extraction plate 51 moves upward in the collecting shell 3, the air inside the collecting shell 3 cannot enter the outside through the one-way valve air inlet 31. At this time, the air inside the collecting shell 3 will be discharged from the air outlet 32 ​​and enter the sampler 2 through the hose. At this time, the sampler 2 will perform separate detection and analysis on the air in different hoses.

[0046] As an implementation method in this embodiment, Figures 4 to 9As shown, two adjacent collecting shells 3 are fixedly connected by a supporting tube 33, and the central axes of the three supporting tubes 33 coincide with each other. The tops of the hollow cavities of the two collecting shells 3 located in the middle and the bottom are provided with first magnets 314 of an annular array. The first spiral pattern 411, the second spiral pattern 412 and the third spiral pattern 413 are rotatably connected in the cavities of the three groups of collecting shells 3 respectively. The bottom of the first spiral pattern 411 is flush with the bottom of the first collecting shell cavity, and the height of the top of the first spiral pattern 411 is lower than the height of the top of the first collecting shell cavity. The second spiral pattern 412 is located in the middle of the second collecting shell cavity, and the top of the third spiral pattern 413 is flush with the top of the third collecting shell cavity. The position of the bottom of the third spiral pattern 413 At a position higher than the bottom of the third collection shell cavity, the upper surfaces of the two extraction plates 51 located in the middle and the bottom are fixedly connected with the second magnets 512 of the annular array, and the two threaded sleeves 52 located in the middle and the bottom are fixedly connected with the trigger tube 521, the positions and quantities of the second magnets 512 and the first magnets 314 correspond to each other, the trigger tube 521 is slidably connected to the support tube 33, and the threaded rod 41 is rotatably connected to the trigger tube 521, the length of the trigger tube 521 is greater than the length of the support tube 33, the distance between the third spiral pattern 413 and the bottom of the collection shell 3 cavity is the same as the height of the threaded sleeve 52, the distance between the first spiral pattern 411 and the top of the collection shell 3 cavity is the same as the height of the threaded sleeve 52, and the second spiral pattern 413 is the same as the height of the threaded sleeve 52. The distances between the spiral pattern 412 and the top and bottom of the cavity of the collecting shell 3 are the same as the height of the threaded sleeve 52. When the servo motor 4 rotates, at this time, since the extraction plates 51 in the middle and at the bottom are adsorbed on the collecting shell 3, the threaded sleeves 52 in the middle and at the bottom are separated from the second spiral pattern 412 and the first spiral pattern 411. When the threaded rod 41 rotates, only the threaded sleeve 52 at the top is threadedly connected with the third spiral pattern 413. Therefore, the extraction plate 51 at the top will move downward in the collecting shell 3 and suck the air in the air into the collecting shell 3 at the top. When the extraction plate 51 at the top moves to the bottom of the cavity of the collecting shell 3, the threaded sleeve 52 in the middle of the extraction plate 51 will be squeezed on the threaded sleeve 52 in the middle The trigger tube 521 at the top of the threaded sleeve 52 is threadedly connected to the second spiral pattern 412 when the trigger tube 521 moves downward. At this time, since the threaded rod 41 is still rotating, the extraction plate 51 located in the middle part moves downward in the middle collecting shell 3 and sucks part of the air in the area where the middle collecting shell 3 is located into the collecting shell 3. As the middle extraction plate 51 moves downward, when the middle extraction plate 51 moves to the bottom of the cavity of the collecting shell 3, it pushes the trigger tube 521 below, so that the threaded sleeve 52 located below is threadedly connected to the first spiral pattern 411, and the extraction plate 51 below moves in the collecting shell 3 below.

[0047] When the extraction plate 51 below moves to the bottom of the cavity of the collecting shell 3, the volume of the air sample in the three collecting shells 3 is the largest. At this time, the operator controls the servo motor 4 to rotate in the opposite direction. When the threaded rod 41 rotates in the opposite direction, since the threaded sleeves 52 located at the top and the middle are separated from the third spiral pattern 413 and the second spiral pattern 412 respectively, the threaded sleeve 52 located at the bottom is still threadedly connected to the first spiral pattern 411, and the extraction plate 51 located below will move upward in the collecting shell 3. When the extraction plate 51 located at the bottom moves to the top of the cavity of the collecting shell 3, the trigger tube 521 will press against the bottom of the threaded sleeve 52 located in the middle, and thread the threaded sleeve 52 with the second spiral pattern 412, so that the extraction plate 51 located in the middle can move upward in the collecting shell 3. At the same time, when the threaded sleeve 52 located at the bottom moves to the top of the first spiral pattern 411, the extraction plate 51 will Under the action of the first magnet 314 and the second magnet 512, it is adsorbed on the top of the cavity of the collecting shell 3 and separated from the first spiral pattern 411. When the middle extraction plate 51 moves to the top of the second spiral pattern 412, the trigger tube 521 will abut against the upper threaded sleeve 52 and push the upper extraction plate 51, so that the upper threaded sleeve 52 is threadedly connected with the third spiral pattern 413, and the upper extraction plate 51 can move upward in the collecting shell 3. When the middle threaded sleeve 52 moves to the end of the second spiral pattern 412, the middle extraction plate 51 will be adsorbed in the collecting shell 3 under the action of the first magnet 314 and the second magnet 512. When the upper extraction plate 51 moves to the top of the cavity of the upper collecting shell 3, the air in the three cavities of the collecting shell 3 has been detected and analyzed by the sampler 2, and the detection results have been displayed on the display screen.

[0048] In this embodiment, if Figures 4 to 9 As shown, the first magnet 314 and the second magnet 512 attract each other. When the distance between the extraction plate 51 and the top of the cavity of the collection shell 3 is close, the first magnet 314 attracts the second magnet 512, so that the extraction plate 51 can move upward and be adsorbed in the collection shell 3.

[0049] As an implementation method in this embodiment, Figure 2 , Figure 6 and Figures 10 to 13As shown, the bottom end of the threaded rod 41 is fixedly connected with a first gear 42, a detection chamber is provided in the sampler 2, and a sensor 23 is provided on the side wall of the detection chamber of the sampler 2. The sensor 23 is used to detect atmospheric volatile organic compounds in the air. The bottom of the sampler 2 is rotatably connected with a second gear 21, and the top of the second gear 21 is connected with a cleaning head 212 through a fixed rod 211. The second gear 21 is meshed with a small gear at the lower part of the gear shaft 22 through a chain, and the large gear at the upper part of the gear shaft 22 is meshed with the first gear 42 through a chain. The diameter of the second gear 21 is larger than the diameter of the first gear 42. When the servo motor 4 rotates, it will drive the first gear 42 to rotate. When the first gear 42 rotates, it will drive the gear shaft 22 to rotate through the chain. The rotation of the gear shaft 22 will drive the second gear 21 to rotate through the chain, and finally the cleaning head 212 is in the detection chamber of the sampler 2. During the rotation of the cleaning head 212, it will contact the detection head of the sensor 23 and clean the stains on the detection head to keep the detection head clean and prevent the stains in the air from adhering to the detection head of the sensor 23, which will cause errors in the detection results. When the air collected in the collection shell 3 below enters the detection chamber of the sampler 2, the sensor 23 will detect the atmospheric volatile organic compounds in the air and display the results on the display screen of the sampler 2. When the sensor 23 finishes detecting the air collected in the collection shell 3 below, the sampler 2 will discharge the air in the detection chamber through the exhaust pump, and then the servo motor 4 will continue to rotate to squeeze the air in the middle collection shell 3 into the sampler 2 for detection. When the air in the middle collection shell 3 is detected, the servo motor 4 will continue to rotate and discharge the air in the upper collection shell 3 into the sampler 2 for detection.

[0050] In this embodiment, if Figure 2 , Figure 6 and Figures 10 to 13 As shown, the diameter of the second gear 21 is larger than the diameter of the small gear below the gear shaft 22, the diameter of the large gear above the gear shaft 22 is larger than the diameter of the small gear below the gear shaft 22, and the diameter of the large gear above the gear shaft 22 is larger than the diameter of the first gear 42. Therefore, when the first gear 42 rotates, the cleaning head 212 can rotate slowly in the sampler 2 through the deceleration of the gear shaft 22 and the second gear 21, so that the sensor 23 in the sampler 2 will not be frequently cleaned during operation, so that the error of the sensor 23 is smaller when it is working.

[0051] The working principle of the technical solution provided by the present invention is as follows:

[0052] When in use, the operator needs to first fix the mounting base 1 on the transport vehicle with bolts and move the transport vehicle to the sampling area. Then the operator controls the rotation of the servo motor 4 to rotate the threaded rod 41. When the threaded rod 41 rotates, the extraction component 5 moves downward in the collecting shell 3. During the movement of the extraction component 5, part of the air at the corresponding height will be sucked into the collecting shell 3. After the corresponding volume of air sample is collected in the collecting shell 3, the operator controls the servo motor 4 to rotate in the opposite direction. At this time, the extraction component 5 will move in the opposite direction in the collecting shell 3, and at the same time, the air sample in the collecting shell 3 will be discharged into the sampler 2 through the hose.

[0053] The air samples in different collection shells 3 are collected and tested separately by the sampler 2. Finally, the operator only needs to observe the data analysis on the display screen of the sampler 2. When the servo motor 4 rotates, the threaded rod 41 is driven to rotate through the output shaft. When the threaded rod 41 rotates, the extraction plate 51 threadedly connected to the first spiral pattern 411, the second spiral pattern 412 and the third spiral pattern 413 will gradually descend in the collection shell 3 under the action of the slide rail 311. When the extraction plate 51 descends, the extraction plate 51 and the top of the cavity in the collection shell 3 are in contact with each other. The distance between them gradually increases. At this time, part of the air at the height of the collecting shell 3 will enter the collecting shell 3 through the one-way valve air inlet 31. When the extraction plate 51 reaches the bottom of the cavity of the collecting shell 3, the operator controls the servo motor 4 to rotate in the opposite direction. At this time, the threaded rod 41 will rotate in the opposite direction under the action of the servo motor 4, and make the extraction plate 51 gradually rise in the collecting shell 3. At this time, the extraction plate 51 will squeeze the air in the cavity of the collecting shell 3, and discharge the air in the cavity of the collecting shell 3 into the sampler 2 through the air outlet 32, and the air will be collected and detected by the sampler 2.

[0054] During the use of the one-way valve air inlet 31, when the extraction plate 51 moves downward in the collecting shell 3, the outside air can enter the collecting shell 3 through the one-way valve air inlet 31, and when the extraction plate 51 moves upward in the collecting shell 3, the air inside the collecting shell 3 cannot enter the outside through the one-way valve air inlet 31. At this time, the air inside the collecting shell 3 will be discharged from the air outlet 32 ​​and enter the sampler 2 through the hose. At this time, the sampler 2 will perform separate detection and analysis on the air in different hoses. When the servo motor 4 rotates, at this time, since the middle and bottom extraction plates 51 are adsorbed on the collecting shell 3, the threaded sleeves 52 located in the middle and bottom are separated from the second spiral pattern 412 and the first spiral pattern 411. When the threaded rod 41 rotates, only There is a threaded sleeve 52 located at the top and the third spiral pattern 413 threadedly connected, so the extraction plate 51 located at the top will move downward in the collecting shell 3 and suck the air in the air into the collecting shell 3 located at the top. When the extraction plate 51 located at the top moves to the bottom of the cavity of the collecting shell 3, the threaded sleeve 52 in the middle of the extraction plate 51 will be squeezed on the trigger tube 521 located at the top of the middle threaded sleeve 52, and the trigger tube 521 will move downward. When the trigger tube 521 moves downward, the middle threaded sleeve 52 will be threadedly connected with the second spiral pattern 412. At this time, since the threaded rod 41 is still rotating, the extraction plate 51 located in the middle part will move downward in the middle collecting shell 3 and suck part of the air in the area where the middle collecting shell 3 is located into the collecting shell 3.

[0055] As the middle extraction plate 51 moves downward, when the middle extraction plate 51 moves to the bottom of the cavity of the collection shell 3, it pushes the trigger tube 521 below, so that the threaded sleeve 52 located below is threadedly connected with the first spiral pattern 411, and the lower extraction plate 51 moves in the lower collection shell 3. When the lower extraction plate 51 moves to the bottom of the cavity of the collection shell 3, the volume of the air sample in the three collection shells 3 is the largest. At this time, the operator controls the servo motor 4 to rotate in the reverse direction. When the threaded rod 41 rotates in the reverse direction, the threaded sleeves 52 located above and in the middle are separated from the third spiral pattern 413 and the second spiral pattern 412 respectively. At this time, the lower extraction plate 51 is moved to the bottom of the cavity of the collection shell 3. The threaded sleeve 52 is still threadedly connected to the first spiral pattern 411, and the extraction plate 51 located below will move upward in the collecting shell 3. When the extraction plate 51 located below moves to the top of the cavity of the collecting shell 3, the trigger tube 521 will press against the bottom of the threaded sleeve 52 located in the middle, and thread the threaded sleeve 52 with the second spiral pattern 412, so that the extraction plate 51 located in the middle can move upward in the collecting shell 3. At the same time, when the threaded sleeve 52 below moves to the top of the first spiral pattern 411, the extraction plate 51 will be adsorbed on the top of the cavity of the collecting shell 3 under the action of the first magnet 314 and the second magnet 512, and separated from the first spiral pattern 411.

[0056] When the middle extraction plate 51 moves to the top of the second spiral pattern 412, the trigger tube 521 will abut against the upper threaded sleeve 52 and push the upper extraction plate 51, so that the upper threaded sleeve 52 is threadedly connected with the third spiral pattern 413, and the upper extraction plate 51 can move upward in the collection shell 3. When the middle threaded sleeve 52 moves to the end of the second spiral pattern 412, the middle extraction plate 51 will be adsorbed in the collection shell 3 under the action of the first magnet 314 and the second magnet 512. When the upper extraction plate 51 moves to the top of the cavity of the upper collection shell 3, the air in the cavities of the three collection shells 3 has been detected and analyzed by the sampler 2, and the detection results have been displayed on the display screen. The first magnet 314 and the second magnet 512 attract each other. When the distance between the extraction plate 51 and the top of the cavity of the collection shell 3 is close, the first magnet 314 will attract the second magnet 512, so that the extraction plate 51 can move upward and be adsorbed in the collection shell 3. When the servo motor 4 rotates, it will drive the first gear 42 to rotate. When the first gear 42 rotates, it will drive the gear shaft 22 to rotate through the chain. The rotation of the gear shaft 22 will drive the second gear 21 to rotate through the chain, and finally the cleaning head 212 will rotate in the detection chamber of the sampler 2. During the rotation of the cleaning head 212, it will contact the detection head of the sensor 23 and clean the stains on the detection head to keep the detection head clean, and avoid the stains in the air adhering to the detection head of the sensor 23, which will cause errors in the detection results. When the air collected in the collection shell 3 below enters the detection chamber of the sampler 2, the sensor 23 will detect the atmospheric volatile organic compounds in the air and display the results on the display screen of the sampler 2. When the sensor 23 finishes detecting the air collected in the collection shell 3 below, the sampler 2 will discharge the air in the detection chamber through the exhaust pump, and then the servo motor 4 will continue to rotate to squeeze the air in the middle collection shell 3 into the sampler 2 for detection.

[0057] When the air in the collection shell 3 in the middle is detected, the servo motor 4 will continue to rotate and discharge the air in the collection shell 3 above into the sampler 2 for detection. The diameter of the second gear 21 is larger than the diameter of the small gear below the gear shaft 22, the diameter of the large gear above the gear shaft 22 is larger than the diameter of the small gear below the gear shaft 22, and the diameter of the large gear above the gear shaft 22 is larger than the diameter of the first gear 42. Therefore, when the first gear 42 rotates, the cleaning head 212 can rotate slowly in the sampler 2 through the deceleration of the gear shaft 22 and the second gear 21, so that the sensor 23 in the sampler 2 will not be frequently cleaned during operation, so that the error of the sensor 23 is smaller when it works.

[0058] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An atmospheric volatile organic compound sampling device for ecological environment monitoring, characterized in that: It includes a mounting base, the top of which is fixedly connected to a collecting shell, the collecting shells are vertically arranged in three groups, namely, a first collecting shell, a second collecting shell and a third collecting shell from bottom to top, two adjacent collecting shells are fixedly connected, and the collecting shells are connected to a sampler through a hose; The sampler is fixedly connected to a mounting base, a servo motor is fixedly connected to the mounting base, a threaded rod is fixedly connected to the output shaft of the servo motor, and the threaded rod is rotatably connected to three sets of collection shells; An extraction component is slidably connected in the collection shell, and the extraction component is used to cooperate with the collection shell to extract air samples in the corresponding area. The sampler is used to process the air samples in the collection shell, and the mounting base is detachably connected to the transport vehicle through fixing plates on both sides; A one-way valve air inlet is fixedly connected to one side of the top of the collection shell, an air outlet is arranged on the other side of the top of the collection shell, the air outlet is connected to the air inlet on the sampler through a hose, and a support cylinder is fixedly connected to the bottom of the collection shell; The interior of the collection shell is a cavity structure, a circular array of slide rails is arranged on the inner wall of the cavity in the collection shell, an exhaust hole is opened at the bottom of the cavity in the collection shell, and a vertically arranged rotation groove is opened on the collection shell, and the diameter of the rotation groove is the same as the aperture of the support tube; Two adjacent collection shells are fixedly connected by a support tube, the central axes of the three support tubes coincide, and the tops of the hollow cavities of the two collection shells located in the middle and the bottom are provided with a first magnet in an annular array; The threaded rod is provided with a second spiral pattern, a third spiral pattern is provided above the second spiral pattern, and a first spiral pattern is provided below the second spiral pattern. The bottom end of the threaded rod is fixedly connected to a first gear, and the first spiral pattern, the second spiral pattern and the third spiral pattern are respectively rotatably connected in the cavities of the three groups of collecting shells, the bottom of the first spiral pattern is flush with the bottom of the first collecting shell cavity, the height of the top of the first spiral pattern is lower than the height of the top of the first collecting shell cavity, the position of the second spiral pattern is located in the middle of the second collecting shell cavity, the top of the third spiral pattern is flush with the top of the third collecting shell cavity, and the position of the bottom of the third spiral pattern is higher than the position of the bottom of the third collecting shell cavity; The sampler is provided with a detection chamber, and a sensor is provided on the side wall of the detection chamber of the sampler, and the sensor is used to detect atmospheric volatile organic compounds in the air. The bottom of the sampler is rotatably connected to a second gear, and the top of the second gear is connected to a cleaning head through a fixed rod. The second gear is meshed with a small gear at the lower part of the gear shaft through a chain, and the large gear at the upper part of the gear shaft is meshed with the first gear through a chain, and the diameter of the second gear is greater than the diameter of the first gear; The extraction assembly includes an extraction plate and a threaded sleeve, the threaded sleeve is fixedly connected to the middle position of the extraction plate, the height of the threaded sleeve is greater than the thickness of the extraction plate, the extraction plate is located in the middle position of the threaded sleeve, and the extraction plate and the threaded sleeve are both provided with three groups; The extraction plate is provided with a circular array of sliding grooves around its periphery, the upper surfaces of the two extraction plates located in the middle and the lower part are fixedly connected with the second magnets in the circular array, and the two threaded sleeves located in the middle and the lower part are fixedly connected with the trigger cylinder; The extraction plate and the collection shell are slidably connected via a slide groove and a slide rail, the positions and quantities of the second magnets correspond to the first magnets one by one, the trigger cylinder is slidably connected in the support cylinder, a threaded rod is rotatably connected in the trigger cylinder, and the length of the trigger cylinder is greater than the length of the support cylinder; The threaded sleeve located at the top is threadedly connected to the third spiral pattern, and the distance between the third spiral pattern and the bottom of the third collecting shell cavity is the same as the height of the threaded sleeve. The threaded sleeve located at the bottom is threadedly connected to the first spiral pattern, and the distance between the first spiral pattern and the top of the first collecting shell cavity is the same as the height of the threaded sleeve. The threaded sleeve located in the middle is threadedly connected to the second spiral pattern, and the distances between the second spiral pattern and the top and bottom of the second collecting shell cavity are the same as the height of the threaded sleeve.

Images