Air gas environment detection device

Abstract

The application relates to the technical field of gas detection, in particular to an air gas environment detection device. In view of the cross contamination of existing equipment when sampling air at different height sections, the air gas environment detection device comprises a base, a bottom support seat and a lifting platform, the lifting platform is provided with a sampling mechanism and a time delay mechanism, the sampling mechanism comprises a collecting cylinder, the collecting cylinder is provided with piston plates, the lifting platform and the collecting cylinder can move upwards synchronously when the lifting device rises, the corresponding piston plates can move forwards at the specified height section and the collecting cylinder can collect air at different height sections when the lifting device rises by cooperating with the time delay mechanism, the collecting cylinder can move downwards to the specified position when the lifting device descends, and the collected air can be injected into a gas detector, the traditional pipe type air collection can be replaced, cross contamination can be avoided, and the detection accuracy is improved.

Description

An air gas environment detection device Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to an air gas environment detection device. Background Technology

[0002] Air gas environment monitoring refers to the periodic detection and analysis of gaseous components in the air using various instruments and technologies. It is an important part of environmental monitoring and is widely used in air quality monitoring, industrial emission monitoring, environmental protection, and climate change research. Volatile organic compounds (VOCs) such as alkanes, alkenes, alcohols, and aldehydes in local air not only affect air quality but also pose a threat to human health, thus requiring regular monitoring and treatment. Existing technology, with publication number CN113433240A and titled "An Automatic Sampling and Monitoring System for Volatile Organic Compounds in the Atmosphere," while capable of sampling and collecting air at different altitudes, still has certain drawbacks. For example, when collecting samples from different altitudes, the long tubes can easily lead to cross-contamination, resulting in inaccurate test results. Furthermore, the collection process relies on an air pump, and the high-speed rotation of the turbine generates heat, which may cause VOCs to decompose at high temperatures, resulting in samples that no longer accurately represent the true atmospheric conditions. Therefore, an air gas environment monitoring device is designed to address the aforementioned problems. Summary of the Invention

[0003] This invention addresses the issue of cross-contamination in existing equipment when sampling air at different altitudes. It provides an air gas environment detection device that can replace traditional tubular air extraction collection when collecting gas samples at different altitudes, avoiding cross-contamination, improving detection accuracy, and effectively solving the problems mentioned in the background art.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows:

[0005] An air gas environment detection device includes a base and a base support. A lifting platform is provided at the upper end of the base support, and a lifting device cooperating with the lifting platform is also provided on the base support. Multiple sampling mechanisms are provided at the lower end of the lifting platform, and multiple delay mechanisms corresponding to the sampling mechanisms are also provided at the lower end of the lifting platform. Each sampling mechanism includes a collection cylinder, and each collection cylinder has a piston plate inside. When the lifting device rises, it enables the lifting platform and collection cylinder to move upward synchronously. When the lifting device rises, in cooperation with the delay mechanisms, the corresponding piston plate moves forward at a specified height, allowing the collection cylinder to collect air at different heights. Multiple gas detectors corresponding to the sampling mechanisms are provided at the upper end of the base. When the lifting device descends, it enables the lifting platform and collection cylinder to move downward synchronously, and when the collection cylinder moves downward to a specified position, it injects the collected air into the gas detector.

[0006] The collection cylinder is provided with an air inlet bend and an exhaust bend, and the air inlet bend is provided with a detachable filter, and the exhaust bend is provided with a conical opening; the filter includes a protective cover, and the upper and lower ends of the protective cover are provided with an outer filter plate and an inner filter plate, respectively. The outer filter plate is provided with a brush that can rotate and move up and down.

[0007] The lifting device includes a rotatable long threaded rod, with a first drive plate slidably connected to the bottom support on the outer surface of the long threaded rod, and a second drive plate slidably connected to the upper end of the lifting platform. The lifting device also includes a scissor telescopic frame that cooperates with the first drive plate and the second drive plate. When the long threaded rod rotates, it can form a structure in which the scissor telescopic frame unfolds upward, the lifting platform moves upward, and the second drive plate moves forward.

[0008] The piston plates are slidably connected to the inner walls of the corresponding collection cylinders. A four-jaw bracket is fixed to the front side of the inner wall of the collection cylinder. A first threaded cylinder is slidably connected to the inner wall of the center of the four-jaw bracket. The piston plates are fixed to one end face of the corresponding first threaded cylinder. The delay mechanism includes a rotatable first threaded rod. The first threaded rod is threaded to the inner wall of the corresponding first threaded cylinder. A long key plate that can move back and forth is rotatably connected to the outer surface of the first threaded rod.

[0009] The inner walls of the left and right ends of the four-claw frame are slidably connected to limit cylinders, and the left and right sides of the rear end surface of the long key plate are fixedly connected to limit rods, which are slidably connected to the inner walls of the corresponding limit cylinders.

[0010] The second drive plate is provided with a plurality of extension rods at its lower end, and a second square box is provided at the lower end of each extension rod. A first square box is provided on the long key plate. A second wedge block that cooperates with the first square box is provided on the inner wall of each second square box. A second spring that cooperates with the second wedge block is provided on the inner wall of the bottom end of each second square box.

[0011] The inner wall of the first square box is provided with a first wedge block, and the inside of the first square box is also provided with a first spring that cooperates with the first wedge block. The lower surface of the lifting platform is provided with a plurality of support seats, and the left and right ends of the support seats are respectively fixed with L-shaped hanging plates that cooperate with the first wedge block.

[0012] The second wedge block is provided with an extension pin at its upper end, and the outer end faces of the two L-shaped hanging plates are provided with V-shaped plates that cooperate with the extension pins. The outer surface of the first threaded cylinder is fitted with a third spring that cooperates with the piston plate.

[0013] A square rod is fixedly connected to the middle part of the lower surface of the long key plate. A square tube that can move up and down is fitted onto the lower end of the outer surface of the square rod. A pry bar is hinged to the left and right sides of the lower end of the long key plate. A first short pin is fixedly connected to the front and rear end surfaces of the square tube. A first keyway that mates with the first short pin is opened on the inner side of the two pry bars. A pull rod is fixedly connected to the lower surface of the first wedge block. A second short pin is fixedly connected to the lower end of the pull rod. A second keyway that mates with the second short pin is opened on the outer side of the two pry bars.

[0014] Multiple vertical plates are fixedly connected to the lower surface of the lifting platform. Each vertical plate has a drive pulley rotatably connected to its lower inner wall and a driven pulley rotatably connected to its upper inner wall. The drive pulley and the driven pulley are connected by a belt. Each support base is slidably connected to the lower surface of the lifting platform. Each driven pulley has a second threaded rod that is threadedly connected to the support base at its rear end. Each drive pulley has a long rotating shaft that is slidably connected to the first threaded rod on its inner wall.

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

[0016] In use, when the first motor is started to move the lifting platform upward, it drives the sampling mechanism and collection cylinder to move upward synchronously. As the lifting device rises, the lifting platform and collection cylinder move upward simultaneously. With the cooperation of the lifting device and the delay mechanism, the corresponding piston plate moves forward at a specified height. The forward movement of the piston plate causes the corresponding collection cylinder to sample and collect air at different heights, thus collecting air at different heights separately, replacing traditional tubular extraction and collection, preventing cross-contamination, and improving detection accuracy. When the collection cylinder moves downward to a specified position, i.e., when the air inlet bend is inserted into the corresponding air inlet, the piston plate can move backward, injecting the collected gas into the corresponding gas detector. This device allows for the separate detection of gas samples at different altitudes during gas detector operation, improving detection accuracy. Since volatile organic compounds (VOCs) have low boiling points and are significantly affected by temperature, their suspended altitude in the air varies with temperature. This device can collect and detect air at different altitudes separately, replacing traditional tubular suction collection to avoid cross-contamination and improve detection accuracy. Furthermore, the device operates without a pump. Pumps generate heat during high-speed turbine rotation, which can cause VOCs to decompose, resulting in samples that no longer accurately represent the atmospheric conditions. Pump-free operation further enhances detection accuracy and ensures data precision. Attached Figure Description

[0017] Figure 1 is a first isometric view of an air gas environment detection device according to the present invention.

[0018] Figure 2 is a second isometric view of an air gas environment detection device according to the present invention.

[0019] Figure 3 is a cross-sectional view of the protective cover of an air gas environment detection device according to the present invention.

[0020] Figure 4 is an external axial sectional view of an air gas environment detection device according to the present invention.

[0021] Figure 5 is a schematic diagram of the installation of the collection cylinder of an air gas environment detection device according to the present invention.

[0022] Figure 6 is a schematic diagram of the installation of a scissor-type telescopic frame for an air and gas environment detection device according to the present invention.

[0023] Figure 7 is a schematic diagram of the installation of the second drive board of an air gas environment detection device according to the present invention.

[0024] Figure 8 is a cross-sectional view of the lifting platform of an air and gas environment detection device according to the present invention.

[0025] Figure 9 is a cross-sectional view of the collection cylinder of an air gas environment detection device according to the present invention.

[0026] Figure 10 is a schematic diagram of the installation of the long rotating shaft of an air gas environment detection device according to the present invention.

[0027] Figure 11 is a schematic diagram of the first box installation of an air gas environment detection device according to the present invention.

[0028] Figure 12 is a schematic diagram of the installation of the L-shaped mounting plate of an air gas environment detection device according to the present invention.

[0029] Figure 13 is a first box cross-sectional view of an air gas environment detection device according to the present invention.

[0030] Figure 14 is a cross-sectional view of the second box of an air gas environment detection device according to the present invention.

[0031] Numbered components in the diagram: 1-Base, 2-Drive wheel, 3-Filter, 4-Bottom support, 5-First motor, 6-Support column, 7-Long threaded rod, 8-First drive plate, 9-Scissor telescopic frame, 10-Second drive plate, 11-Lifting platform, 12-Collection cylinder, 13-Piston plate, 14-Inlet bend, 15-Exhaust bend, 16-Limit cylinder, 17-Third spring, 18-First threaded cylinder, 19-Four-jaw bracket, 20-Limit rod, 21-Long key plate, 22-First threaded rod, 23-First square box, 24-First wedge block, 25-Pull rod, 26-First spring, 27-Square cylinder, 28-Square rod, 29-First short pin, 30-Pry bar, 3 1-First keyway, 32-Second short pin, 33-Second keyway, 34-Ball, 35-Extension rod, 36-Second square box, 37-Second wedge block, 38-Second spring, 39-Extension pin, 40-L-shaped hanging plate, 41-V-shaped plate, 42-Long rotating shaft, 43-First handle, 44-Upright plate, 45-Driving pulley, 46-Splined cylinder, 47-Driven pulley, 48-Second threaded rod, 49-Support seat, 50-Detector, 51-Air inlet, 52-Outer filter plate, 53-Protective cover, 54-Inner filter plate, 55-Fan blade, 56-Outer shaft, 57-Inner shaft, 58-Tension spring, 59-Brush, 60-Extension pin, 61-Protruding ring. Detailed Implementation

[0032] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] As shown in Figures 1-14, the present invention provides an air gas environment detection device, including a base 1 and a base support 4. The base support 4 is provided with a lifting platform 11 at its upper end, and a lifting device that cooperates with the lifting platform 11 is also provided on the base support 4. The lower end of the lifting platform 11 is provided with multiple sampling mechanisms, and the lower end of the lifting platform 11 is also provided with multiple delay mechanisms corresponding to the sampling mechanisms. Each sampling mechanism includes a collection cylinder 12, and a piston plate 13 is provided inside the collection cylinder 12. When the lifting device rises, the lifting platform 11 and the collection cylinder 12 can move upward synchronously. When the lifting device rises, it can cooperate with the delay mechanism to make the corresponding piston plate 13 move forward at a specified height, and the collection cylinder 12 can collect air at different heights. The upper end of the base 1 is provided with multiple gas detectors 50 corresponding to the sampling mechanisms. When the lifting device falls, the lifting platform 11 and the collection cylinder 12 can move downward synchronously, and when the collection cylinder 12 moves downward to a specified position, it can inject the collected air into the gas detector 50.

[0034] As shown in Figures 1-10, the base 1 supports the entire device. Multiple drive wheels 2 are located at the lower end of the base 1, enabling the device to reach a designated position. The drive wheels 2 are existing technology and will not be described further. The bottom support 4 is used to mount the lifting platform 11. The sampling mechanism is mounted on the lifting platform 11. The lifting device can drive the lifting platform 11 to move up and down. When the lifting platform 11 moves up and down, it can drive the sampling mechanism and the collection cylinder 12 to move up and down. Through the piston plate 13, when the piston plate 13 moves forward, it can draw in outside air. Inside the collection cylinder 12, when the lifting device rises, the lifting platform 11 and the collection cylinder 12 move upward synchronously. With the cooperation of the lifting device and the delay mechanism, the corresponding piston plate 13 can move forward at a specified height. As the piston plate 13 moves forward, the corresponding collection cylinder 12 samples and collects air from different heights, thus collecting air from different heights separately, replacing the traditional tubular extraction method, preventing cross-contamination, and improving detection accuracy. The gas detector 50 is correspondingly set up with the sampling mechanism, and the gas detector 50 is equipped with an air inlet. 51. When the lifting platform 11 moves downward, it drives the sampling mechanism and the collection cylinder 12 to move downward. When the collection cylinder 12 moves downward to the designated position, that is, when the air inlet bend 14 is inserted into the corresponding air inlet 51, the piston plate 13 can move backward to inject the collected gas into the corresponding gas detector 50. Thus, when the gas detector 50 is working, gas samples at different heights are detected separately, improving the detection accuracy. The gas detector 50 is existing technology and will not be described in detail. Since volatile organic compounds have low boiling points, temperature has a significant impact on them. The height at which volatile organic compounds are suspended in the air will also change with different temperatures. This device can collect and detect air at different heights separately, and replaces the traditional tubular air extraction collection to avoid cross-contamination and improve detection accuracy. This device also operates without an air pump. Since the turbine generates a certain amount of heat when the air pump is working, volatile organic compounds may decompose at high temperatures, causing the collected samples to no longer represent the true atmospheric state. The pump-free operation can further improve detection accuracy and ensure the accuracy of the data.

[0035] The collection cylinder 12 is provided with an air inlet bend 14 and an exhaust bend 15 respectively. The air inlet bend 14 is provided with a detachable filter 3 respectively, and the exhaust bend 15 is provided with a conical opening. The filter 3 includes a protective cover 53. The upper and lower ends of the protective cover 53 are provided with an outer filter plate 52 and an inner filter plate 54 respectively. The outer filter plate 52 is provided with a brush 59 that can rotate and move up and down.

[0036] As shown in Figures 2-4, the filter 3 can filter impurities in the air, such as willow catkins and broken fibers. The filter 3 is connected to the air inlet bend 14 by threads, allowing for disassembly, regular cleaning, or replacement. The tapered opening facilitates the insertion of the exhaust bend 15 into the corresponding air inlet 51 when it moves downwards to a designated position. Rubber rings are provided on the inner walls of the air inlets 51; when the exhaust port is inserted into the air inlet 51, the rubber rings improve the sealing effect and reduce gas leakage. One-way valves are provided on the inner walls of both the air inlet bend 14 and the exhaust bend 15, ensuring that even if the air inlet bend 14 only allows air to enter... The air intake bend 15 can only discharge air. When the piston plate 13 moves backward, the one-way valve in the intake bend 14 opens, allowing outside air to enter the collection cylinder 12. When the piston plate 13 moves backward, the one-way valve in the exhaust bend 15 opens, allowing the air in the collection cylinder 12 to exit through the exhaust bend 15. The one-way valve is existing technology and will not be described further. The external filter plate 52 and internal filter plate 54 provide dual filtration of the air, preventing external impurities from entering the equipment. The protective cover 53 also contains a rotating fan blade 55, which is driven to rotate by the flowing air during extraction. The outer shaft 56 can be driven by a motor instead of the fan blade 55, depending on the requirements. The upper end of the fan blade 55 is fixed to the outer shaft 56, which is rotatably connected to the outer filter plate 52. The inner shaft 57 is slidably connected to the inner wall of the outer shaft 56. The inner shaft 57 and the outer shaft 56 are splined. When the outer shaft 56 rotates, it can drive the inner shaft 57 to rotate, and the inner shaft 57 can slide up and down on the inner wall of the outer shaft 56. A tension spring 58 is fixed to the inner wall of the bottom end of the outer shaft 56. The upper end of the tension spring 58 is fixed to the lower surface of the inner shaft 57. The tension spring 58 always exerts a downward pulling force on the inner shaft 57, so that the inner shaft 57 and the brush 56 rotate. 9. Under normal conditions, the brush 59 is fixed to the upper surface of the inner shaft 57. Two long pins 60 are fixed to the lower surface of the brush 59. A convex ring 61 that cooperates with the long pins 60 is fixed to the middle of the outer filter plate 52. Under the tension of the tension spring 58, the long pins 60 can always be in contact with the convex ring 61. When the fan blade 55, outer shaft 56, inner shaft 57 and brush 59 rotate, the long pins 60 and convex ring 61 can make the brush 59 rotate and move up and down, thereby timely removing impurities on the upper end of the outer filter plate 52, preventing filter hole blockage and improving filtration efficiency.

[0037] The lifting device includes a rotatable long threaded rod 7, with a first drive plate 8 threadedly connected to the outer surface of the long threaded rod 7 and slidably connected to the base support 4. A second drive plate 10 is slidably connected to the upper end of the lifting platform 11. The lifting device also includes a scissor telescopic frame 9 that cooperates with the first drive plate 8 and the second drive plate 10. When the long threaded rod 7 rotates, it can form a structure in which the scissor telescopic frame 9 unfolds upward, the lifting platform 11 moves upward, and the second drive plate 10 moves forward.

[0038] As shown in Figures 1-2 and 5-6, a first motor 5 is fixedly connected to the lower end of the base support 4, and a long threaded rod 7 is fixedly connected to the output end of the first motor 5. The function of the first motor 5 is to provide rotational power for the long threaded rod 7. The motor is existing technology and will not be described in detail. A bearing seat is rotatably connected to the outer surface of the long threaded rod 7. The bottom end of the bearing seat is fixedly connected to the lower end surface of the base support 4, limiting the long threaded rod 7 to rotate only at the lower end of the base support 4. Support columns 6 are fixedly connected to the four corners of the lower end surface of the base support 4, and the support columns 6 are fixedly connected to the upper end surface of the base 1, which is equivalent to the base support 4 being fixed to the upper end of the base 1. The first drive plate 8 can move forward... The sliding connection is located on the lower surface of the base support 4, which limits the first drive plate 8 to move back and forth on the base support 4. When the long threaded rod 7 rotates, the first drive plate 8 can move forward or backward through the threaded connection with it. The second drive plate 10 is slidably connected to the upper surface of the lifting platform 11, which limits the second drive plate 10 to move back and forth on the lifting platform 11. The installation and shape of the scissor telescopic frame 9, the first drive plate 8, and the second drive plate 10 are shown in Figure 5 or Figure 6. The two scissor telescopic frames 9 are respectively set on both sides of the base support 4, and the lower front side of the scissor telescopic frame 9 is... The scissor-type telescopic frame 9 is hinged to the base support 4. The rear lower end of the scissor-type telescopic frame 9 is hinged to the first drive plate 8, the front upper end of the scissor-type telescopic frame 9 is hinged to the lifting platform 11, and the rear upper end of the scissor-type telescopic frame 9 is hinged to the second drive plate 10. When the first drive plate 8 moves forward, it drives the scissor-type telescopic frame 9 to move upward and unfold. When the scissor-type telescopic frame 9 unfolds upward, it drives the lifting platform 11 to move upward, and the upward unfolding of the scissor-type telescopic frame 9 also drives the second drive plate 10 to move forward. Similarly, when the first drive plate 8 moves backward, it drives the scissor-type telescopic frame 9 to retract downward and the lifting platform 11 to retract downward. The first motor 5 moves forward, and the second drive plate 10 moves backward. Therefore, when the first motor 5 is started, it can drive the corresponding long threaded rod 7 to rotate. When the long threaded rod 7 rotates, it can drive the first drive plate 8 to move forward or backward, that is, the lifting platform 11 moves up or down and the second drive plate 10 moves forward or backward. This controls the lifting platform 11 and the collecting cylinder 12 to move up or down to a designated position. Furthermore, the long threaded rod 7 has a self-locking function under the threaded connection with the first drive plate 8. That is, when the long threaded rod 7 does not rotate, the corresponding position of the lifting platform 11 is fixed and can be stably positioned at the designated position.

[0039] The piston plates 13 are slidably connected to the inner walls of the corresponding collection cylinders 12. A four-jaw bracket 19 is fixedly connected to the front side of the inner wall of the collection cylinder 12. A first threaded cylinder 18 is slidably connected to the inner wall of the center of the four-jaw bracket 19. The piston plates 13 are fixedly connected to one end face of the corresponding first threaded cylinder 18. The delay mechanism includes a first threaded rod 22 that can rotate. The first threaded rod 22 is threadedly connected to the inner wall of the corresponding first threaded cylinder 18. A long key plate 21 that can move back and forth is rotatably connected to the outer surface of the first threaded rod 22.

[0040] As shown in Figures 8-10, the collection cylinder 12 is fixedly connected to the lower surface of the lifting platform 11. The first threaded cylinder 18 is slidably connected to the inner wall of the four-jaw bracket 19. The first threaded cylinder 18 and the four-jaw bracket 19 are splined, so that the first threaded cylinder 18 can only slide back and forth on the inner wall of the four-jaw bracket 19 and cannot rotate. The first threaded rod 22 is threadedly connected to the first threaded cylinder 18 and has a self-locking function. That is, when the first threaded rod 22 does not rotate, the total length of the first threaded cylinder 18 and the first threaded rod 22 is fixed, which can lock the initial position of the long key plate 21. When the long key plate 21 moves back and forth, it can drive the first threaded rod 22, the first threaded cylinder 18, the piston plate 13, etc. to move back and forth, thereby controlling the collection cylinder 12 to perform air extraction or exhaust. When the first threaded rod 22 rotates, through the threaded connection with the long threaded cylinder, the first threaded rod 22 and the long key plate 21 can move forward or backward, which can change the initial position of the long key plate 21, that is, it can change the height at which the collection cylinder 12 performs air sampling.

[0041] The four-claw frame 19 has slidably connected to the inner walls of the left and right ends of the four-claw frame 19, and the long key plate 21 has slidably connected to the left and right sides of the rear end surface, and the slidably connected to the inner walls of the corresponding slidably connected to the slidably connected to the inner walls of the slidably connected to ...

[0042] As shown in Figure 9 or Figure 10, the rear end surface of the limiting cylinder 16 is fixed to the piston plate 13. The limiting cylinder 16 can slide back and forth on the inner wall of the four-jaw bracket 19. The limiting cylinder 16 can improve the stability of the piston plate 13. The limiting rod 20 can slide back and forth on the inner wall of the limiting cylinder 16. The two limiting rods 20 can limit the long key plate 21 to move back and forth but not rotate.

[0043] The second drive plate 10 is provided with a plurality of extension rods 35 at its lower end, and a second square box 36 is provided at the lower end of each extension rod 35. A first square box 23 is provided on the long key plate 21. A second wedge block 37 that cooperates with the first square box 23 is provided on the inner wall of the second square box 36. A second spring 38 that cooperates with the second wedge block 37 is provided on the inner wall of the bottom end of the second square box 36.

[0044] As shown in Figures 7, 12, and 14, the extension rod 35 is fixed to the lower surface of the drive plate, and the second square box 36 is fixed to the inner end face of the lower end of the extension rod 35. When the second drive plate 10 moves back and forth, it can drive the extension rod 35 and the second square box 36 to move back and forth. There are multiple sets of extension rods 35, each set of extension rods 35 corresponding to a corresponding delay mechanism. There are two extension rods 35 in each set, used to install and drive the second square box 36 and the second wedge block 37 to move forward or backward. The first square box 23 is fixed to the left and right sides of the upper surface of the key plate 21. When the first square box 23 moves back and forth, it can drive the key plate 21 to move back and forth. As shown in Figure 14, the second wedge block 37 can slide left and right to connect to the second square box. The second spring 38 always exerts an inward driving force on the second wedge block 37 on the inner wall of 36, so that the second wedge block 37 is in the state of extending its innermost end under normal conditions. The second wedge block 37 is arranged in a corresponding manner with the first square box 23. When the second drive plate 10 moves forward, it can drive the extension rod 35, the second square box 36, the second wedge block 37, etc. to move forward synchronously. When the second wedge block 37 moves forward to the designated position, the straight surface of the second wedge block 37 can contact the rear end surface of the first square box 23. When the second wedge block 37 continues to move forward, it can drive the first square box 23 and the first wedge block 24 to move forward, thereby driving the first square box 23, the long key plate 21, and the first wedge block 24 to move forward to the designated position.

[0045] The inner wall of the first square box 23 is provided with a first wedge block 24, and the inside of the first square box 23 is also provided with a first spring 26 that cooperates with the first wedge block 24. The lower surface of the lifting platform 11 is provided with a plurality of support seats 49, and the left and right ends of the support seats 49 are respectively fixed with L-shaped hanging plates 40 that cooperate with the first wedge block 24.

[0046] As shown in Figures 11-13, the first square box 23 is fixed to the left and right sides of the upper surface of the long key plate 21. The first square box 23 is used to support and install the first wedge block 24. The first wedge block 24 can slide up and down to connect to the inner wall of the first square box 23. The function of the first spring 26 is to lift the first wedge block 24 with an upward driving force, so that the first wedge block 24 is in the extended position at the top under normal conditions. The support base 49 is used to support and fix the L-shaped hanging plate. 40. The L-shaped hanging plate 40 is aligned with the first wedge block 24. When the long key plate 21, the first square box 23, and the first wedge block 24 move from back to front, the inclined surface of the first wedge block 24 can meet the L-shaped hanging plate 40. After the inclined surface of the first wedge block 24 contacts the L-shaped hanging plate 40, when the long key plate 21, the first square box 23, and the first wedge block 24 continue to move forward, the inclined surface of the first wedge block 24 can be aligned with the L-shaped hanging plate. Under the contact engagement of 40, the first wedge 24 can move downward, that is, the first wedge 24 enters the inner wall of the first square box 23 and compresses the first spring 26. When the long key plate 21, the first wedge 24, etc. continue to move forward to the designated position, that is, when the first wedge 24 moves forward to the rear end position of the L-shaped hanging plate 40, the first wedge 24 disengages from the L-shaped hanging plate 40, and the first wedge 24 will then be spring-loaded by the first spring 26. When the L-shaped plate 40 moves upward to reset, it can prevent the first wedge block 24 from resetting backward. That is, when the long key plate 21, the first wedge block 24, etc. move from front to back at the front end of the L-shaped plate 40, the straight surface of the first wedge block 24 can meet the L-shaped plate 40, that is, the L-shaped plate 40 can prevent the first wedge block 24 from resetting backward; the L-shaped plate 40 is used to prevent the long key plate 21 from resetting backward.

[0047] The second wedge block 37 is provided with an extension pin 39 at its upper end. The outer end faces of the two L-shaped hanging plates 40 are provided with V-shaped plates 41 that cooperate with the extension pins 39. The outer surface of the first threaded cylinder 18 is fitted with a third spring 17 that cooperates with the piston plate 13.

[0048] As shown in Figures 10, 12, and 14, the extension pins 39 are respectively fixed to the upper surface of the corresponding second wedge blocks 37. Keyways are respectively provided on the upper surface of the second square box 36, and the extension pins 39 are respectively installed on the inner wall of the keyways, allowing the extension pins 39 to move left and right on the inner wall of the second square box 36. When the extension pins 39 move left and right, they can drive the second wedge blocks 37 to move left and right. The front end of the third spring 17 is fixed to the four-jaw bracket 19, and the rear end of the third spring 17 is fixed to the piston plate 13. The third spring 17 always exerts a backward pushing force on the piston plate 13, so that the piston plate 13 is in the bottommost position of the collecting cylinder 12 under normal conditions. Extension pins 39 and V-shaped plates... As shown in Figure 12, the V-shaped plate 41 is fixed to the two end faces of the L-shaped hanging plate 40. When the extension rod 35, the second square box 36, the second wedge block 37, and the extension pin 39 move forward, the second wedge block 37 can push the first square box 23 forward. When the second wedge block 37 and the extension pin 39 move forward to the designated position, that is, when the first square box 23 and the first wedge block 24 are pushed to the front end position of the L-shaped hanging plate 40, the extension pin 39 can meet the V-shaped plate 41. When the extension pin 39 contacts and engages with the inclined surface of the V-shaped plate 41 and continues to move forward, the extension pin 39 can move outward while moving forward, that is, the corresponding second wedge block 37. It can move forward and outward simultaneously. When the second wedge 37 moves outward and enters the inner wall of the second square box 36, it no longer contacts the first square box 23, meaning it disengages from the first square box 23 and no longer drives the first square box 23 forward. At this time, the first wedge 24 has a backward driving force under the elastic force of the third spring 17. The first wedge 24 can stably contact the L-shaped hanging plate 40. When the extension rod 35, the second wedge 37, the extension pin 39, etc. continue to move forward, they can move away from the corresponding first square box 23, L-shaped hanging plate 40, and V-shaped plate 41. After the extension pin 39 disengages from the V-shaped plate 41, the second wedge 37 can be pushed by the elastic force of the second spring 38. When the extension rod 35, the second square box 36, and the second wedge block 37 move forward to the top position and then move backward to reset, that is, when the extension rod 35, the second square box 36, and the second wedge block 37 move backward from the front end, the second wedge block 37 can make its inclined surface contact the first square box 23. Under the contact between the inclined surface of the second wedge block 37 and the first square box 23, the second wedge block 37 can move outward and re-enter the inner wall of the second square box 36. When the second wedge block 37 moves backward and disengages from the first square box 23, the second wedge block 37 can move inward again and pop out under the elastic force of the second spring 38.That is, through the cooperation of the first wedge 24, the first square box 23, the second wedge 37, the second square box 36, the extension pin 39, and the L-shaped hanging plate 40, when the lifting platform 11 moves upward, the corresponding second drive plate 10, extension rod 35, and second wedge 37 move from back to front. When the lifting platform 11 and the collecting cylinder 12 reach the designated height, the second drive plate 10, extension rod 35, and second wedge 37 can move forward to contact the corresponding... When the lifting platform 11 continues to rise, the second wedge block 37 can continue to move forward, pushing the corresponding first box 23, first wedge block 24, long key plate 21, etc., forward. That is, the corresponding piston plate 13 can move forward, allowing gas sampling and collection in the designated height area. When the lifting platform 11 continues to move upward to the designated position, the second wedge block 37 pushes the first box 23 and first wedge block 24 to the lower end of the corresponding L-shaped hanging plate 40. At this time, the piston plate 13 moves backward to the designated position, that is, the collection cylinder 12 completes the sampling of air in the designated height area. When the second drive plate 10, second wedge block 37, etc., continue to move forward, the second wedge block 37 can move outward under the contact engagement of the extension pin 39 and the V-shaped plate 41, that is, no longer driving the first box 23 to move forward. When the lifting platform 11 continues to move upward, the next sampling mechanism can work again, thereby completing the sampling of different... Air samples are taken sequentially from the height zone. After sampling, when the lifting platform 11 moves downward from the top, the second drive plate 10, the second square box 36, and the second wedge block 37 can move backward from their frontmost positions to reset. When the second wedge block 37 moves backward to reset, its inclined surface contacts the first square box 23, preventing the first square box 23 from moving backward. The second wedge block 37 can then move unidirectionally from back to front to reset to its initial position.

[0049] A square rod 28 is fixedly connected to the middle part of the lower surface of the long key plate 21. A square tube 27 that can move up and down is fitted onto the lower end of the outer surface of the square rod 28. A pry bar 30 is hinged to the left and right sides of the lower end of the long key plate 21. A first short pin 29 is fixedly connected to the front and rear ends of the square tube 27. A first keyway 31 that mates with the first short pin 29 is opened on the inner end of the two pry bars 30. A pull rod 25 is fixedly connected to the lower surface of the first wedge block 24. A second short pin 32 is fixedly connected to the lower end of the pull rod 25. A second keyway 33 that mates with the second short pin 32 is opened on the outer end of the two pry bars 30.

[0050] As shown in Figure 13, the square rod 28 penetrates the long key plate 21 and is slidably connected to the inner wall of the long key plate 21. The square tube 27 is slidably connected to the outer surface of the square rod 28, and the square rod 28 can limit the square tube 27 to move only up and down. The installation and shape of the square rod 28, square tube 27, pry bar 30, first short pin 29, and second short pin 32 are shown in Figure 13. Support plates are fixed to the left and right sides of the lower end surface of the long key plate 21, and the pry bar 30 is hinged to the support plates, which means that the pry bar 30 is hinged to the lower end of the long key plate 21. When the square tube 27 moves upward, it can drive the two first short pins 29 to move upward. When the first short pins 29 move upward, they can drive the two first short pins 29 to move upward through engagement with the first keyway 31. The pry bar 30 flips upward, and when it flips upward, it engages with the second short pin 32, driving the pull rod 25 downward. The pull rod 25 then drives the first wedge block 24 downward. When the L-shaped hanging plate 40 contacts and engages with the first wedge block 24, the downward movement of the first wedge block 24 disengages the L-shaped hanging plate 40. At this point, the first wedge block 24 can move forward and reset under the force of the third spring 17. When the lifting platform 11 moves upward, the sampling mechanisms work sequentially to collect air from different height zones. When the lifting platform 11 reaches the top, after all sampling mechanisms have completed sampling, the first wedge block 24 is positioned on the corresponding L-shaped hanging plate 40. At the front end position, when the lifting platform 11 moves downward to reset, it enables the sampling mechanism, namely the collection cylinder 12, the long key plate 21, and the square cylinder 27, to move downward synchronously. When the lifting platform 11 moves downward to the point where the exhaust bend 15 is inserted into the corresponding air inlet 51, the square cylinder 27 can move downward to contact the upper surface of the bottom support 4, and the square cylinder 27 stops moving downward under the obstruction of the bottom support 4. When the lifting platform 11 and the sampling mechanism continue to move downward, the two pry bars 30 can flip upward to move the first wedge block 24 downward into the inner wall of the first square box 23. When the first wedge block 24 moves downward, it can disengage from the L-shaped hanging plate 40, and the piston plate 13, the first wedge block 24, the long key plate 21, etc., can then... The cylinder 27 will move backward and reset under the elastic force of the third spring 17. When the piston plate 13 moves backward, it can push the gas in the collection cylinder 12, thereby injecting the gas into the corresponding gas detector 50. The lower end of the square cylinder 27 is rotatably connected to the ball bearing 34. Through the ball bearing 34, the friction between the square cylinder 27 and the bottom support 4 can be reduced when the square cylinder 27 moves backward and resets with the long key plate 21. When the lifting platform 11 moves upward again, the square cylinder 27 can disengage from the bottom support 4, and the square cylinder 27, the first wedge block 24, etc. can move upward and reset to the initial state under the elastic force of the first spring 26. That is, the first wedge block 24 can cooperate with the L-shaped hanging plate 40 again, that is, the device can be used repeatedly in a cycle.

[0051] Multiple vertical plates 44 are fixedly connected to the lower surface of the lifting platform 11. The lower inner wall of each vertical plate 44 is rotatably connected to a drive pulley 45, and the upper inner wall of each vertical plate 44 is rotatably connected to a driven pulley 47. The drive pulley 45 and the driven pulley 47 are connected by a belt. The support base 49 is slidably connected to the lower surface of the lifting platform 11. The rear end of each driven pulley 47 is fixedly connected to a second threaded rod 48 that is threaded to the support base 49. The inner wall of each drive pulley 45 is slidably connected to a long rotating shaft 42 that is fixedly connected to a first threaded rod 22.

[0052] As shown in Figures 10 and 11, the upright plate 44 is used to support and install the driving pulley 45, driven pulley 47, etc. Bearing seats are rotatably connected to the outer surface of the second threaded rod 48. The bottom end of the bearing seat is fixed to the lower surface of the lifting platform 11, limiting the second threaded rod 48 to rotate stably only at the lower end of the lifting platform 11. The support seat 49 is slidably connected to the lower surface of the lifting platform 11. When the second threaded rod 48 rotates, it can drive the support seat 49 to move forward or backward, thus adjusting the position of the L-shaped hanging plate 40. Furthermore, the threaded connection between the second threaded rod 48 and the support seat 49 provides self-adjustment. The locking function ensures that the positions of the corresponding support base 49 and L-shaped hanging plate 40 are fixed when the second threaded rod 48 is not rotating. Splined cylinders 46 are fixedly connected to the rear end surface of the drive pulley 45, and the splined cylinders 46 are rotatably connected to the corresponding upright plates 44, which is equivalent to the drive pulley 45 being rotatably connected to the upright plates 44. The long rotating shaft 42 and the splined cylinders 46 are splinedly connected, allowing the long rotating shaft 42 to slide back and forth on the inner wall of the splined cylinders 46. When the long rotating shaft 42 rotates, it can drive the splined cylinders 46 and the drive pulley 45 to rotate synchronously. The rear end of the long rotating shaft 42 is fixedly connected to the first threaded rod 22. When the long rotating shaft 42 rotates... When in motion, it can drive the first threaded rod 22 to rotate. A first handle 43 is fixed to the front end surface of the long rotating shaft 42. The function of the first handle 43 is to facilitate the rotation of the long rotating shaft 42. The pitch and direction of the first threaded rod 22 and the pitch and direction of the second threaded rod 48 are the same. That is, when the first threaded rod 22 and the second threaded rod 48 rotate synchronously, they can drive the long key plate 21, the first wedge block 24, the support base 49, the L-shaped hanging plate 40, etc. to move forward or backward synchronously. This ensures that the distance between the first wedge block 24 and the L-shaped hanging plate 40 is always maintained at a specified length in the initial position, which means that the piston plate 13 can be moved synchronously. The collection cylinder 12 can collect a specified amount of air by moving a specified distance. When the first handle 43 is rotated, it can drive the long rotating shaft 42, the first threaded rod 22, the driving pulley 45, the driven pulley 47, and the second threaded rod 48 to rotate synchronously. When the first threaded rod 22 and the second threaded rod 48 rotate synchronously, they can drive the long key plate 21, the first wedge block 24, the L-shaped hanging plate 40, etc. to move forward or backward synchronously. When the long key plate 21 and the first wedge block 24 move forward or backward, they can change their initial position, that is, they can change the working height of the sampling mechanism, and can sample air in different height areas according to needs.

[0053] In use, when the first motor 5 is started to move the lifting platform 11 upward, it drives the sampling mechanism and the collection cylinder 12 to move upward synchronously. When the lifting device rises, the lifting platform 11 and the collection cylinder 12 move upward synchronously. With the cooperation of the lifting device and the delay mechanism, the corresponding piston plate 13 can move forward at a specified height. When the piston plate 13 moves forward, it causes the corresponding collection cylinder 12 to sample and collect air at different heights, thereby collecting air at different heights separately, replacing the traditional tubular extraction and collection, preventing cross-contamination, and improving detection accuracy. When the collection cylinder 12 moves downward to a specified position, that is, when the air inlet bend 14 is inserted into the corresponding air inlet 51, the piston plate 13 can move backward to inject the collected gas. The gas is fed into the corresponding gas detector 50, allowing for separate detection of gas samples at different altitudes while the gas detector 50 is operating. This improves detection accuracy. Since volatile organic compounds (VOCs) have low boiling points, temperature has a significant impact on them, and the height at which VOCs remain suspended in the air varies with different temperatures. This device can collect and detect air at different altitudes separately, replacing traditional tubular suction collection to avoid cross-contamination and improve detection accuracy. Furthermore, the device operates without a pump. When a pump operates, the high-speed rotation of the turbine generates heat, which may cause VOCs to decompose at high temperatures, resulting in the collected samples no longer representing the true atmospheric conditions. Pump-free operation further improves detection accuracy and ensures data accuracy.

Claims

1. An air gas environment detection device, comprising a base (1) and a base support (4), characterized in that: The upper end of the base support (4) is provided with a lifting platform (11), and the base support (4) is also provided with a lifting device that cooperates with the lifting platform (11). The lower end of the lifting platform (11) is provided with multiple sampling mechanisms, and the lower end of the lifting platform (11) is also provided with multiple delay mechanisms corresponding to the sampling mechanisms. The sampling mechanisms include collection cylinders (12), and piston plates (13) are provided inside the collection cylinders (12). When the lifting device rises, the lifting platform (11) and the collection cylinders (12) can move upward synchronously. When the lifting device rises, it can cooperate with the delay mechanisms. The mechanism enables the corresponding piston plate (13) to move forward at a specified height and the collection cylinder (12) to collect air at different heights; the upper end of the base (1) is equipped with multiple gas detectors (50) corresponding to the sampling mechanism. When the lifting device descends, the lifting platform (11) and the collection cylinder (12) can move downward synchronously, and when the collection cylinder (12) moves downward to a specified position, it can inject the collected air into the gas detector (50); the lifting device includes a rotatable long threaded rod (7), and the long threaded rod... The outer surface of the threaded rod (7) is threaded with a first drive plate (8) that is slidably connected to the bottom support (4). The upper end of the lifting platform (11) is slidably connected with a second drive plate (10). The lifting device also includes a scissor telescopic frame (9) that cooperates with the first drive plate (8) and the second drive plate (10). When the long threaded rod (7) rotates, it can form a structure in which the scissor telescopic frame (9) unfolds upward, the lifting platform (11) moves upward, and the second drive plate (10) moves forward. The piston plates (13) are slidably connected to the corresponding collection cylinders (14). 2) Inner wall, a four-jaw bracket (19) is fixedly connected to the front side of the inner wall of the collecting cylinder (12). A first threaded cylinder (18) is slidably connected to the inner wall of the center of the four-jaw bracket (19). The piston plate (13) is fixedly connected to one end face of the corresponding first threaded cylinder (18). The delay mechanism includes a first threaded rod (22) that can rotate. The first threaded rod (22) is threadedly connected to the inner wall of the corresponding first threaded cylinder (18). A long key plate (21) that can move back and forth is rotatably connected to the outer surface of the first threaded rod (22).

2. The air gas environment detection device as described in claim 1, characterized in that: The collection cylinder (12) is provided with an air inlet bend (14) and an exhaust bend (15). The air inlet bend (14) is provided with a detachable filter (3), and the exhaust bend (15) is provided with a conical opening. The filter (3) includes a protective cover (53). The upper and lower ends of the protective cover (53) are provided with an outer filter plate (52) and an inner filter plate (54). The outer filter plate (52) is provided with a brush (59) that can rotate and move up and down.

3. The air gas environment detection device as described in claim 1, characterized in that: The four-claw frame (19) has a limit cylinder (16) slidably connected to the inner walls of its left and right ends respectively. The long key plate (21) has a limit rod (20) fixedly connected to the left and right sides of its rear end surface respectively. The limit rod (20) is slidably connected to the inner wall of the corresponding limit cylinder (16).

4. The air gas environment detection device as described in claim 1, characterized in that: The second drive plate (10) is provided with a plurality of extension rods (35) at its lower end. The extension rods (35) are provided with a second square box (36) at their lower ends. The long key plate (21) is provided with a first square box (23). The inner wall of the second square box (36) is provided with a second wedge block (37) that cooperates with the first square box (23). The inner wall of the bottom end of the second square box (36) is provided with a second spring (38) that cooperates with the second wedge block (37).

5. An air gas environment detection device as described in claim 4, characterized in that: The inner wall of the first square box (23) is provided with a first wedge block (24), and the inside of the first square box (23) is also provided with a first spring (26) that cooperates with the first wedge block (24). The lower surface of the lifting platform (11) is provided with a plurality of support seats (49), and the left and right ends of the support seats (49) are respectively fixed with L-shaped hanging plates (40) that cooperate with the first wedge block (24).

6. The air gas environment detection device as described in claim 5, characterized in that: The second wedge block (37) is provided with an extension pin (39) at its upper end. The outer end faces of the two L-shaped hanging plates (40) are provided with V-shaped plates (41) that cooperate with the extension pin (39). The outer surface of the first threaded cylinder (18) is fitted with a third spring (17) that cooperates with the piston plate (13).

7. An air gas environment detection device as described in claim 5, characterized in that: The lower end surface of the long key plate (21) is fixedly connected to a square rod (28). The lower end of the outer surface of the square rod (28) is fitted with a square tube (27) that can move up and down. The left and right sides of the lower end of the long key plate (21) are respectively hinged to pry bars (30). The front and rear ends of the square tube (27) are respectively fixedly connected to a first short pin (29). The inner ends of the two pry bars (30) are respectively provided with a first keyway (31) that cooperates with the first short pin (29). The lower end surface of the first wedge block (24) is respectively fixedly connected to a pull rod (25). The lower end of the pull rod (25) is respectively fixedly connected to a second short pin (32). The outer ends of the two pry bars (30) are respectively provided with a second keyway (33) that cooperates with the second short pin (32).

8. An air gas environment detection device as described in claim 5, characterized in that: The lower surface of the lifting platform (11) is fixed with multiple vertical plates (44), and the inner wall of the lower end of the vertical plates (44) is rotatably connected with driving pulleys (45), and the inner wall of the upper end of the vertical plates (44) is rotatably connected with driven pulleys (47). The driving pulleys (45) and driven pulleys (47) are connected by belts. The support bases (49) are slidably connected to the lower surface of the lifting platform (11), and the rear end of the driven pulleys (47) is fixed with second threaded rods (48) that are threadedly connected to the support bases (49). The inner wall of the driving pulleys (45) is slidably connected with long rotating shafts (42) that are fixed to the first threaded rods (22).

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