Air gas environment detection device

Abstract

The invention relates to the technical field of gas detection, in particular to an air and gas environment detection device, and provides the air and gas environment detection device aiming at the situation that cross contamination exists when existing equipment samples air at different height sections, the air and gas environment detection device comprises a base, a bottom supporting seat and a lifting table, and the lifting table is provided with a sampling mechanism and a time delay mechanism; the sampling mechanism comprises a collecting barrel, piston plates are arranged in the collecting barrel, the lifting platform and the collecting barrel can synchronously move upwards when the lifting device ascends, the corresponding piston plates can move forwards at the specified height section through cooperation with the time delay mechanism when the lifting device ascends, and the collecting barrel collects air at different height sections; when the lifting device descends, the collecting barrel can move downwards to a designated position, and collected air is injected into the gas detector; traditional tubular air exhaust collection can be replaced, cross contamination is avoided, and the detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to an air gas environment detection device. Background Art

[0002] Air gas environment detection refers to the regular detection and analysis of gas components in the air by using various instruments and technical means. It is an important part of environmental monitoring and is widely used in fields such as air quality monitoring, industrial emission detection, environmental protection, and climate change research. Volatile organic compounds such as alkanes, alkenes, alcohols, and aldehydes contained in local air not only affect air quality but also pose a threat to human health. Therefore, regular detection and treatment are required. In the prior art, the publication number is: CN113433240A, and the name is: An automatic sampling and monitoring system for volatile organic compounds in the atmosphere. Although this device can sample and collect air at different height segments, it still has certain defects. For example, during collection at different segments, due to the long pipes, there is an easy situation of cross-contamination, resulting in inaccurate detection results. Moreover, during collection, an air pump is still required. When the air pump works, a certain amount of heat is generated under the high-speed rotation of the turbine. Volatile organic compounds may decompose at high temperatures, resulting in the collected samples no longer representing the true atmospheric state. Therefore, an air gas environment detection device is designed to solve the problems mentioned above. Summary of the Invention

[0003] In view of the cross-contamination situation that exists when the existing equipment samples air at different height segments, the present invention provides an air gas environment detection device. When collecting gas samples at different heights, it can replace the traditional tube-type air extraction collection, avoid cross-contamination, improve the detection accuracy, and effectively solve the problems mentioned in the above background art.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows: An air gas environment detection device includes a base and a bottom support seat. An elevating platform is provided at the upper end of the bottom support seat, and an elevating device cooperating with the elevating platform is also provided on the bottom support seat. A plurality of sampling mechanisms are provided at the lower end of the elevating platform, and a plurality of delay mechanisms corresponding to the sampling mechanisms are also provided at the lower end of the elevating platform. Each sampling mechanism includes a collection cylinder, and a piston plate is respectively arranged inside the collection cylinder. When the elevating device rises, the elevating platform and the collection cylinder can move upward synchronously. When the elevating device rises, through cooperation with the delay mechanism, the corresponding piston plate can move forward at a specified height segment, and the collection cylinder can collect air at different height segments. A plurality of gas detectors corresponding to the sampling mechanisms are provided at the upper end of the base. When the elevating device descends, the elevating platform and the collection cylinder can move downward synchronously, and when the collection cylinder moves downward to a specified position, the collected air can be injected into the gas detector.

[0005] The collection cylinders are respectively provided with an intake elbow and an exhaust elbow. Removable filters are respectively provided on the intake elbows, and conical openings are respectively provided on the exhaust elbows; the filter includes a protective cover, with an outer filter plate and an inner filter plate respectively provided at the upper and lower ends of the protective cover, and a brush capable of rotating and moving up and down is provided on the outer filter plate.

[0006] The lifting device includes a rotatable long threaded rod. A first driving plate slidably connected to the bottom support base is threadedly connected to the outer surface of the long threaded rod. A second driving plate is slidably connected to the upper end of the lifting platform. The lifting device further includes a scissor expansion frame that cooperates with the first driving plate and the second driving plate. When the long threaded rod rotates, a structure can be formed in which the scissor expansion frame expands upward, the lifting platform moves upward, and the second driving plate moves forward.

[0007] The piston plates are respectively slidably connected to the inner walls of the corresponding collection cylinders. Four-claw brackets are respectively fixedly connected to the front sides of the inner walls of the collection cylinders. A first threaded cylinder is slidably connected to the inner wall at the center of the four-claw bracket. The piston plates are respectively fixedly connected to one end face of the corresponding first threaded cylinder. The delay mechanisms each include a rotatable first threaded rod, and the first threaded rods are respectively threadedly connected to the inner walls of the corresponding first threaded cylinders. A long key plate capable of moving back and forth is respectively rotatably connected to the outer surface of the first threaded rod.

[0008] Limit cylinders are respectively slidably connected to the inner walls at the left and right ends of the four-claw bracket. Limit rods are respectively fixedly connected to the left and right sides of the rear surface of the long key plate, and the limit rods are respectively slidably connected to the inner walls of the corresponding limit cylinders.

[0009] A plurality of extension rods are respectively provided at the lower ends of the second driving plates. Second square boxes are respectively provided at the lower ends of the extension rods. First square boxes are respectively provided on the long key plates. Second wedge-shaped blocks that cooperate with the first square boxes are respectively provided in the inner walls of the second square boxes. Second springs that cooperate with the second wedge-shaped blocks are respectively provided on the bottom inner walls of the second square boxes.

[0010] First wedge-shaped blocks are respectively provided in the inner walls of the first square boxes. First springs that cooperate with the first wedge-shaped blocks are respectively further provided inside the first square boxes. A plurality of support seats are respectively provided on the lower surface of the lifting platform. L-shaped hanging plates that cooperate with the first wedge-shaped blocks are respectively fixedly connected to the left and right end surfaces of the support seats.

[0011] Extension pins are respectively provided at the upper ends of the second wedge-shaped blocks. V-shaped plates that cooperate with the extension pins are respectively provided on the outer end faces of the two L-shaped hanging plates. Third springs that cooperate with the piston plates are respectively sleeved on the outer surfaces of the first threaded cylinders.

[0012] The middle parts of the lower surfaces of the long key plates are respectively fixedly connected with square rods. Square cylinders capable of moving up and down are respectively sleeved on the lower ends of the outer surfaces of the square rods. The left and right sides of the lower ends of the long key plates are respectively hinged with pry bars. The front and rear ends of the surfaces of the square cylinders are respectively fixedly connected with first short pins. First key grooves matched with the first short pins are respectively formed in the inner ends of the two pry bars. The lower ends of the first wedge-shaped blocks are respectively fixedly connected with pull rods. The lower ends of the pull rods are respectively fixedly connected with second short pins. Second key grooves matched with the second short pins are respectively formed in the outer ends of the two pry bars.

[0013] A plurality of vertical plates are fixedly connected to the lower surface of the lifting platform. The inner walls of the lower ends of the vertical plates are respectively rotatably connected with driving belt pulleys. The inner walls of the upper ends of the vertical plates are respectively rotatably connected with driven belt pulleys. The driving belt pulleys and the driven belt pulleys are connected by belts; the support seats are respectively slidably connected to the lower surface of the lifting platform. The rear ends of the driven belt pulleys are respectively fixedly connected with second threaded rods threadedly connected with the support seats. The inner walls of the driving belt pulleys are respectively slidably connected with long rotating shafts fixedly connected with the first threaded rods.

[0014] The present invention has the following advantages compared with the prior art: When the present invention is in use, when the first motor is started to make the lifting platform move upward, it can drive the sampling mechanism, the collection cylinder, etc. to move upward synchronously. When the lifting device rises, the lifting platform and the collection cylinder move upward synchronously. Under the cooperation of the lifting device and the delay mechanism, the corresponding piston plate can move forward at a specified height section. When the piston plate moves forward, it will cause the corresponding collection cylinder to sample and collect the air at different height sections, so as to separately collect the air at different height sections, replace the traditional tube extraction collection, prevent cross-contamination, and improve the detection accuracy; when the collection cylinder moves downward to a specified position, that is, when the air inlet elbow is inserted into the corresponding air inlet, at this time the piston plate can move backward and inject the collected gas into the corresponding gas detector, so as to separately detect the gas samples at different height sections when the gas detector works, and improve the detection accuracy. Since the boiling point of volatile organic compounds is relatively low and the temperature has a great influence on them, the height of volatile organic compounds suspended in the air will also change at different temperatures. This device can separately collect and detect the air at different height sections, and replace the traditional tube air extraction collection to avoid cross-contamination and improve the detection accuracy. This device is also free of air pumps throughout the process. Since a certain amount of heat will be generated when the turbine of the air pump rotates at high speed during operation, volatile organic compounds may decompose at high temperatures, resulting in the collected samples no longer representing the true atmospheric state. The operation without an air pump can further improve the detection accuracy and ensure the accuracy of the data. Description of the Drawings

[0015] Figure 1 It is the first axonometric drawing of an air gas environment detection device of the present invention.

[0016] Figure 2The second axonometric drawing of an air gas environment detection device of the present invention.

[0017] Figure 3 The cross-sectional view of the protective cover of an air gas environment detection device of the present invention.

[0018] Figure 4 The external shaft cross-sectional view of an air gas environment detection device of the present invention.

[0019] Figure 5 The installation schematic diagram of the collection cylinder of an air gas environment detection device of the present invention.

[0020] Figure 6 The installation schematic diagram of the scissor expansion frame of an air gas environment detection device of the present invention.

[0021] Figure 7 The installation schematic diagram of the second drive plate of an air gas environment detection device of the present invention.

[0022] Figure 8 The cross-sectional view of the lifting platform of an air gas environment detection device of the present invention.

[0023] Figure 9 The cross-sectional view of the collection cylinder of an air gas environment detection device of the present invention.

[0024] Figure 10 The installation schematic diagram of the long rotating shaft of an air gas environment detection device of the present invention.

[0025] Figure 11 The installation schematic diagram of the first square box of an air gas environment detection device of the present invention.

[0026] Figure 12 The installation schematic diagram of the L-shaped hanging plate of an air gas environment detection device of the present invention.

[0027] Figure 13 The cross-sectional view of the first square box of an air gas environment detection device of the present invention.

[0028] Figure 14 The cross-sectional view of the second square box of an air gas environment detection device of the present invention.

[0029] Reference Numerals in the Figures: 1 - Base, 2 - Driving Wheel, 3 - Filter, 4 - Bottom Support Base, 5 - First Motor, 6 - Support Column, 7 - Long Threaded Rod, 8 - First Driving Plate, 9 - Scissor Expansion Frame, 10 - Second Driving Plate, 11 - Lifting Platform, 12 - Collection Cylinder, 13 - Piston Plate, 14 - Intake Bend, 15 - Exhaust Bend, 16 - Limiting Cylinder, 17 - Third Spring, 18 - First Threaded Cylinder, 19 - Four-Claw Frame, 20 - Limiting 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 Tube, 28 - Square Rod, 29 - First Short Pin, 30 - Pry Bar, 31 - 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 - Vertical Plate, 45 - Driving Pulley, 46 - Spline Tube, 47 - Driven Pulley, 48 - Second Threaded Rod, 49 - Support Base, 50 - Detector, 51 - Intake Port, 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 - Convex Ring. Detailed Embodiment

[0030] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0031] As Figures 1-14 shown, the present invention provides an air gas environment detection device, including a base 1 and a bottom support base 4. An upper end of the bottom support base 4 is provided with a lifting platform 11, and a lifting device cooperating with the lifting platform 11 is further provided on the bottom support base 4. A lower end of the lifting platform 11 is provided with multiple sampling mechanisms, and a lower end of the lifting platform 11 is further provided with multiple delay mechanisms corresponding to the sampling mechanisms. The sampling mechanisms respectively include collection cylinders 12, and piston plates 13 are respectively arranged inside the collection cylinders 12. When the lifting device ascends, the lifting platform 11 and the collection cylinders 12 can move upward synchronously. When the lifting device ascends, by cooperating with the delay mechanisms, the corresponding piston plates 13 can move forward at a specified height section, and the collection cylinders 12 can collect air at different height sections. Multiple gas detectors 50 corresponding to the sampling mechanisms are provided at an upper end of the base 1. When the lifting device descends, the lifting platform 11 and the collection cylinders 12 can move downward synchronously, and when the collection cylinders 12 move downward to a specified position, the collected air can be injected into the gas detectors 50.

[0032] As Figures 1-10, the base 1 is used to support and install the entire device. A plurality of driving wheels 2 are provided at the lower end of the base 1. By means of the provided driving wheels 2, the device can reach the designated position. The driving wheels 2 are of the prior art and will not be elaborated here. The bottom support seat 4 is used to install the lifting platform 11, and the sampling mechanism is installed 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. By means of the provided piston plate 13, when the piston plate 13 moves forward, it can draw the outside air into the collection cylinder 12. When the lifting device rises, the lifting platform 11 and the collection cylinder 12 move up synchronously. Under the cooperation of the lifting device and the delay mechanism, the corresponding piston plate 13 can move forward at a specified height section. When the piston plate 13 moves forward, it will cause the corresponding collection cylinder 12 to sample and collect the air at different height sections, so as to separately collect the air at different height sections, replace the traditional tube extraction and collection, prevent cross-contamination, and improve the detection accuracy. The gas detector 50 is arranged corresponding to the sampling mechanism. An air inlet 51 is provided on the gas detector 50. When the lifting platform 11 moves downward, it can drive 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 intake elbow 14 is inserted into the corresponding air inlet 51, at this time the piston plate 13 can move backward and inject the collected gas into the corresponding gas detector 50, so as to separately detect the gas samples at different height sections when the gas detector 50 works, improve the detection accuracy. The gas detector 50 is of the prior art and will not be elaborated here. Since the boiling point of volatile organic compounds is relatively low, temperature has a great influence on them. When the temperature is different, the height at which volatile organic compounds are suspended in the air will also change. This device can separately collect and detect the air at different height sections, replace the traditional tube air extraction and collection to avoid cross-contamination, and improve the detection accuracy. And this device has no air pump involved in the whole process. Since a certain amount of heat will be generated when the turbine of the air pump rotates at high speed, volatile organic compounds may decompose at high temperature, resulting in the collected samples no longer representing the real atmospheric state. By operating without an air pump, the detection accuracy can be further improved to ensure the accuracy of the data.

[0033] The collection cylinder 12 is respectively provided with an intake elbow 14 and an exhaust elbow 15. Removable filters 3 are respectively provided on the intake elbow 14. Conical openings are respectively provided on the exhaust elbow 15. The filter 3 includes a protective cover 53. Outer filter plates 52 and inner filter plates 54 are respectively provided at the upper and lower ends of the protective cover 53. A brush 59 that can move up and down while rotating is provided on the outer filter plate 52.

[0034] As Figures 2-4As shown in the figure, the filter 3 can filter impurities in the air such as catkins and shredded silk. The filter 3 is connected to the intake elbow 14 by threads and can be disassembled regularly for cleaning or replacement; through the provided conical opening, it is convenient for the exhaust elbow 15 to move downward to the designated position and insert into the corresponding intake port 51. Rubber rings are respectively provided on the inner wall of the intake port 51. When the exhaust port is inserted into the intake port 51, the provided rubber rings can improve the sealing effect and reduce gas leakage; check valves are respectively provided on the inner walls of the intake elbow 14 and the exhaust elbow 15, that is, the intake elbow 14 can only intake air and the exhaust elbow 15 can only exhaust air. When the piston plate 13 moves backward, the check valve in the intake elbow 14 opens, and external gas enters the collection cylinder 12. When the piston plate 13 moves backward, the check valve in the exhaust elbow 15 opens, and the gas in the collection cylinder 12 is discharged from the exhaust elbow 15. The check valve belongs to the prior art and will not be elaborated here; through the provided outer filter plate 52 and inner filter plate 54, the gas can be filtered doubly, thereby preventing external impurities from entering the equipment interior; a rotatable fan blade 55 is also provided inside the protective cover 53. When pumping air, the flowing gas can drive the fan blade 55 to rotate, or a motor can be added instead of the fan blade 55 to drive the outer shaft 56 to rotate, which can be selected according to requirements. The upper end of the fan blade 55 is fixedly connected to the outer shaft 56. The outer shaft 56 is rotatably connected to the outer filter plate 52. The inner wall of the outer shaft 56 is slidably connected to the inner shaft 57. The inner shaft 57 and the outer shaft 56 are in spline connection. When the outer shaft 56 rotates, it can drive the inner shaft 57 to rotate, and the inner shaft 57 can also slide up and down on the inner wall of the outer shaft �8. The upper end of the outer shaft 56 is fixedly connected to the lower end surface of the inner shaft 57. The tension spring 58 always has a downward pulling force on the inner shaft 57, so that the inner shaft 57 and the brush body 59 can be in the lowest position under normal conditions. The brush body 59 is fixedly connected to the upper end surface of the inner shaft 57. Two long pin shafts 60 are fixedly connected to the lower end surface of the brush body 59. A convex ring 61 matching the long pin shafts 60 is fixedly connected to the middle of the outer filter plate 52. Under the pulling force of the tension spring

[0035] The lifting device includes a rotatable long threaded rod 7. A first driving plate 8 that is threadedly connected to the outer surface of the long threaded rod 7 and slidably connected to the bottom support seat 4. A second driving plate 10 is slidably connected to the upper end of the lifting platform 11. The lifting device also includes a scissor expansion frame 9 that cooperates with the first driving plate 8 and the second driving plate 10. When the long threaded rod 7 rotates, a structure in which the scissor expansion frame 9 unfolds upward, the lifting platform 11 moves upward, and the second driving plate 10 moves forward can be formed.

[0036] AsFigures 1-2 , Figures 5-6 As shown, a first motor 5 is fixedly connected to the lower end of the bottom support base 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 a rotational force for the long threaded rod 7. The motor is a prior art and will not be elaborated here. A bearing seat is rotatably connected to the outer surface of the long threaded rod 7, and the bottom end of the bearing seat is fixedly connected to the lower surface of the bottom support base 4, limiting the long threaded rod 7 to only rotate at the lower end of the bottom support base 4. Support columns 6 are respectively fixedly connected to the four corner positions of the lower surface of the bottom support base 4, and the support columns 6 are respectively fixedly connected to the upper surface of the base 1, which is equivalent to the bottom support base 4 being fixedly connected to the upper end of the base 1. The first driving plate 8 is slidably connected to the lower surface of the bottom support base 4 in the front-back direction, that is, limiting the first driving plate 8 to only move back and forth on the bottom support base 4. When the long threaded rod 7 rotates, under the threaded connection with the first driving plate 8, the first driving plate 8 can be driven to move forward or backward. The second driving plate 10 is slidably connected to the upper surface of the lifting platform 11 in the front-back direction, that is, limiting the second driving plate 10 to only move back and forth on the lifting platform 11. The installation and shape of the scissor expansion frame 9, the first driving plate 8, and the second driving plate 10 are as Figure 5 or Figure 6 shown. Two scissor expansion frames 9 are respectively arranged on both sides of the bottom support base 4. The front sides of the lower ends of the scissor expansion frames 9 are respectively hinged to the bottom support base 4, the rear sides of the lower ends of the scissor expansion frames 9 are respectively hinged to the first driving plate 8, the front sides of the upper ends of the scissor expansion frames 9 are respectively hinged to the lifting platform 11, and the rear sides of the upper ends of the scissor expansion frames 9 are respectively hinged to the second driving plate 10. When the first driving plate 8 moves forward, it can drive the scissor expansion frame 9 to move upward and expand. When the scissor expansion frame 9 expands upward, it can drive the lifting platform 11 to move upward, and when the scissor expansion frame 9 expands upward, it can also drive the second driving plate 10 to move forward. Similarly, when the first driving plate 8 moves backward, it can drive the scissor expansion frame 9 to move downward and fold, the lifting platform 11 to move downward, and the second driving plate 10 to move 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 driving plate 8 to move forward or backward, that is, the lifting platform 11 moves upward or downward, and the second driving plate 10 moves forward or backward, so as to control the lifting platform 11 and the collection cylinder 12 to move upward to a designated position or downward to a designated position. And under the threaded connection between the long threaded rod 7 and the first driving plate 8, it has a self-locking function, that is, when the long threaded rod 7 does not rotate, the position of the corresponding lifting platform 11 is in a fixed state and can be stably located at the designated position.

[0037] The piston plates 13 are respectively slidably connected to the inner walls of the corresponding collection cylinders 12. Four-claw brackets 19 are respectively fixedly connected to the front sides of the inner walls of the collection cylinders 12. The inner walls at the centers of the four-claw brackets 19 are respectively slidably connected to first threaded cylinders 18. The piston plates 13 are respectively fixedly connected to one side end faces of the corresponding first threaded cylinders 18. The delay mechanisms each include a rotatable first threaded rod 22. The first threaded rods 22 are respectively threadedly connected to the inner walls of the corresponding first threaded cylinders 18. Long key plates 21 that can move back and forth are respectively rotatably connected to the outer surfaces of the first threaded rods 22.

[0038] As Figures 8-10 shown, the collection cylinders 12 are respectively fixedly connected to the lower end surfaces of the lifting platforms 11. The first threaded cylinders 18 can slidably move back and forth in the inner walls of the four-claw brackets 19. The first threaded cylinders 18 and the four-claw brackets 19 are in spline connection, so that the first threaded cylinders 18 can only slide back and forth in the inner walls of the four-claw brackets 19 and cannot rotate. The first threaded rods 22 and the first threaded cylinders 18 are in threaded connection and have a self-locking function, that is, when the first threaded rods 22 do not rotate, the total lengths of the first threaded cylinders 18 and the first threaded rods 22 are in a fixed state, that is, the initial positions of the long key plates 21 can be locked. When the long key plates 21 move back and forth, they can drive the first threaded rods 22, the first threaded cylinders 18, the piston plates 13, etc. to move back and forth, so as to control the collection cylinders 12 to draw air or exhaust air. When the first threaded rods 22 rotate, under the threaded connection with the long threaded cylinders, the first threaded rods 22 and the long key plates 21 can move forward or backward, and the initial positions of the long key plates 21 can be changed, that is, the heights for the collection cylinders 12 to take air samples can be changed.

[0039] The inner walls at the left and right ends of the four-claw brackets 19 are respectively slidably connected to limit cylinders 16. The left and right sides of the rear end surfaces of the long key plates 21 are respectively fixedly connected to limit rods 20. The limit rods 20 are respectively slidably connected to the inner walls of the corresponding limit cylinders 16.

[0040] As Figure 9 or Figure 10 shown, the rear end surfaces of the limit cylinders 16 are respectively fixedly connected to the piston plates 13. The limit cylinders 16 can slidably move back and forth in the inner walls of the four-claw brackets 19. By providing the limit cylinders 16, the stability of the piston plates 13 can be improved. The limit rods 20 can slidably move back and forth in the inner walls of the limit cylinders 16. The long key plates 21 can be limited to only move back and forth and not rotate through the two limit rods 20.

[0041] A plurality of extension rods 35 are respectively provided at the lower ends of the second drive plates 10. Second square boxes 36 are respectively provided at the lower ends of the extension rods 35. First square boxes 23 are respectively provided on the long key plates 21. Second wedge-shaped blocks 37 that cooperate with the first square boxes 23 are respectively provided in the inner walls of the second square boxes 36. Second springs 38 that cooperate with the second wedge-shaped blocks 37 are respectively provided on the bottom inner walls of the second square boxes 36.

[0042] AsFigure 7 , Figure 12 and Figure 14 As shown in Figure 7 , Figure 12 and Figure 14 , the extension rod 35 is fixedly connected to the lower end surface of the driving plate. The second square box 36 is fixedly connected to the inner end surface of the lower end of the extension rod 35 respectively. When the second driving 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 groups of extension rods 35, and each group of extension rods 35 corresponds to the corresponding time-delay mechanism respectively. Each group of extension rods 35 has two, which are used to install and drive the second square box 36 and the second wedge-shaped block 37 to move forward or backward; the first square box 23 is fixedly connected to the left and right sides of the upper end surface of the long key plate 21. When the first square box 23 moves back and forth, it can drive the long key plate 21 to move back and forth; as Figure 14 shown in Figure 14 , the second wedge-shaped block 37 can be slidably connected to the inner wall of the second square box 36 left and right. The second spring 38 always has an inward driving force on the second wedge-shaped block 37, so that the second wedge-shaped block 37 is in the outermost state at the inner end in the normal state; the second wedge-shaped block 37 is arranged corresponding to the first square box 23 front and back. When the second driving plate 10 moves forward, it can drive the extension rod 35, the second square box 36, the second wedge-shaped block 37, etc. to move forward synchronously. When the second wedge-shaped block 37 moves forward to a specified position, the straight surface of the second wedge-shaped block 37 can contact the rear end surface of the first square box 23. When the second wedge-shaped block 37 continues to move forward, it can drive the first square box 23 and the first wedge-shaped block 24 to move forward, so as to drive the first square box 23, the long key plate 21 and the first wedge-shaped block 24 to move forward to a specified position.

[0043] The inner walls of the first square box 23 are respectively provided with the first wedge-shaped blocks 24. The first square box 23 is also respectively provided with first springs 26 that cooperate with the first wedge-shaped blocks 24 inside. The lower end surface of the lifting table 11 is respectively provided with a plurality of support seats 49. The left and right end surfaces of the support seats 49 are respectively fixedly connected with L-shaped hanging plates 40 that cooperate with the first wedge-shaped blocks 24.

[0044] As Figures 11-13As shown, 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 be slidably connected to the inner wall of the first square box 23 up and down. The function of the first spring 26 is to lift the first wedge block 24 and have an upward driving force so that the first wedge block 24 is in the topmost extended state under normal conditions; the support seat 49 is used to support and fix the L-shaped hanging plate 40. The L-shaped hanging plate The plate 40 is aligned with the first wedge-shaped block 24. When the long key plate 21, the first square box 23, the first wedge-shaped block 24, etc. move from back to front, the inclined surface of the first wedge-shaped block 24 can meet the L-shaped hanging plate 40. After the inclined surface of the first wedge-shaped block 24 contacts the L-shaped hanging plate 40, the long key plate 21, the first square box 23, the first wedge-shaped block 24, etc. continue to move forward, so that the inclined surface of the first wedge-shaped block 24 can meet the L-shaped hanging plate 40. When the first wedge block 24 is engaged, it can move downward, that is, the first wedge block 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 block 24, etc. continue to move forward to the specified position, that is, the first wedge block 24 moves forward to the rear end of the L-shaped hanging plate 40, at this time, the first wedge block 24 is out of contact with the L-shaped hanging plate 40, and the first wedge block 24 will be under the elastic force of the first spring 26. When the long key plate 21 and the first wedge block 24 are moved from front to back at the front end of the L-shaped hanging plate 40, the straight surface of the first wedge block 24 can meet the L-shaped hanging plate 40, that is, the L-shaped hanging plate 40 can prevent the first wedge block 24 from moving backward; the long key plate 21 is prevented from moving backward by the L-shaped hanging plate 40.

[0045] An extension pin 39 is provided on the upper end of each second wedge-shaped block 37, and a V-shaped plate 41 matching the extension pin 39 is provided on the outer end surface of each of the two L-shaped hanging plates 40. A third spring 17 matching the piston plate 13 is respectively sleeved on the outer surface of each of the first threaded cylinders 18.

[0046] like Figure 10 、 Figure 12 and Figure 14 As shown, the extension pins 39 are respectively fixed to the upper end surfaces of the corresponding second wedge blocks 37, and the upper end surfaces of the second square boxes 36 are respectively provided with key grooves. The extension pins 39 are respectively installed on the inner walls of the key grooves, so that the extension pins 39 can 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 ends of the third springs 17 are respectively fixed to the four-claw frames 19, and the rear ends of the third springs 17 are respectively fixed to the piston plates 13. The third springs 17 always have a backward thrust on the piston plate 13, so that the piston plate 13 is in the bottom end state of the collecting cylinder 12 under normal conditions; the settings of the extension pins 39 and the V-shaped plates 41 are as shown Figure 12As shown, the V-shaped plates 41 are respectively fixedly connected to both side end faces of the L-shaped hanging plate 40. When the extension rod 35, the second square box 36, the second wedge-shaped block 37, the extension pin 39, etc. move forward, the second wedge-shaped block 37 can push the first square box 23 forward. When the second wedge-shaped block 37, the extension pin 39, etc. move forward to a specified position, that is, when the first square box 23 and the first wedge-shaped block 24 are pushed to the front end position of the L-shaped hanging plate 40, at this time the extension pin 39 can meet the V-shaped plate 41. When the extension pin 39 continues to move forward after contacting and engaging with the inclined surface of the V-shaped plate 41, the extension pin 39 can move outward while moving forward, that is, the corresponding second wedge-shaped block 37 can move outward while moving forward. When the second wedge-shaped block 37 moves outward and enters the inner wall of the second square box 36, it no longer contacts the first square box 23, that is, it disengages from the first square box 23 and no longer drives the first square box 23 to move forward. At this time, the first wedge-shaped block 24 has a backward driving force under the elastic force of the third spring 17, and the straight surface of the first wedge-shaped block 24 can stably contact the L-shaped hanging plate 40. When the extension rod 35, the second wedge-shaped block 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-shaped block 37 can move inward again and pop out to reset under the elastic force of the second spring 38; when the extension rod 35, the second square box 36, the second wedge-shaped block 37, etc. move forward to the top position and then move backward to reset, that is, when the extension rod 35, the second square box 36, the second wedge-shaped block 37, etc. move backward from the front end, when the second wedge-shaped block 37 moves backward, its inclined surface can contact and meet the first square box 23. Under the contact between the inclined surface of the second wedge-shaped block 37 and the first square box, the second wedge-shaped block 37 can move outward again and enter the inner wall of the second square box 36. When the second wedge-shaped block 37 moves backward and disengages from the first square box 23, the second wedge-shaped block 37 can move inward again and pop out under the elastic force of the second spring 38;That is, through the mutual cooperation of the set first wedge block 24, first square box 23, second wedge block 37, second square box 36, extension pin 39 and L-shaped hanging plate 40, when the lifting platform 11 moves upward, that is, the corresponding second drive plate 10, extension rod 35, second wedge block 37, etc. move from back to front. When the lifting platform 11, collection cylinder 12, etc. reach the specified height, at this time, the second drive plate 10, extension rod 35, second wedge block 37 can move forward to contact the corresponding first square box 23. When the lifting platform 11 continues to rise, the second wedge block 37 can continue to move forward to push the corresponding first square box 23, first wedge block 24, long key plate 21, etc. forward, that is, the corresponding piston plate 13 can move forward. At this time, gas sampling and collection can be carried out in the specified height area. When the lifting platform 11 continues to move upward to the specified position, the second wedge block 37 pushes the first square box 23 and first wedge block 24 to the lower end position of the corresponding L-shaped hanging plate 40. At this time, the piston plate 13 moves backward to the specified position, that is, the collection cylinder 12 completes the sampling of the air in the specified 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 and engagement of the extension pin 39 and V-shaped plate 41, that is, it no longer drives the first square box 23 to move forward. When the lifting platform 11 continues to move upward, the next sampling mechanism can work again, so as to complete the sequential sampling of the air in different height areas; after the sampling is completed, when the lifting platform 11 moves downward from the top, at this time, the second drive plate 10, second square box 36, second wedge block 37, etc. can move backward and reset from the frontmost position. When the second wedge block 37 moves backward and resets, through the contact between the inclined surface of the second wedge block 37 and the first square box 23, at this time, it no longer drives the first square box 23 to move backward, and the second wedge block 37 can move forward from back to its initial position unidirectionally.;

[0047] In the middle of the lower end surface of the long key plate 21, square rods 28 are respectively fixedly connected. Square cylinders 27 that can move up and down are respectively sleeved on the outer surfaces of the lower ends of the square rods 28. Pry bars 30 are respectively hinged on the left and right sides of the lower end of the long key plate 21. First short pins 29 are respectively fixedly connected to the front and rear end surfaces of the square cylinder 27. First key grooves 31 that cooperate with the first short pins 29 are respectively opened at the inner ends of the two pry bars 30. Pulling rods 25 are respectively fixedly connected to the lower end surfaces of the first wedge blocks 24. Second short pins 32 are respectively fixedly connected to the lower ends of the pulling rods 25. Second key grooves 33 that cooperate with the second short pins 32 are respectively opened at the outer ends of the two pry bars 30.

[0048] As Figure 13As shown, the square rod 28 passes through the long key plate 21 and is slidably connected to the inner wall of the long key plate 21 up and down. The square tube 27 can be slidably connected to the outer surface of the square rod 28 up and down. 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, the square tube 27, the pry bar 30, the first short pin 29, and the second short pin 32 are as Figure 13 shown. Support plates are fixedly connected to the left and right sides of the lower surface of the long key plate 21 respectively. The pry bars 30 are respectively hinged to the support plates, which is equivalent to the pry bars 30 being 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, through the engagement with the first key groove 31, they can drive the two pry bars 30 to turn upward. When the pry bars 30 turn upward, through the engagement with the second short pins 32, they can drive the pull rod 25 to move downward. When the pull rod 25 moves downward, it can drive the first wedge-shaped block 24 to move downward. When the L-shaped hanging plate 40 comes into contact and engages with the first wedge-shaped block 24, the downward movement of the first wedge-shaped block 24 can cause it to disengage from the L-shaped hanging plate 40. At this time, the first wedge-shaped block 24 can move forward and reset under the elastic force of the third spring 17. When the lifting platform 11 moves upward, it can make the sampling mechanism work in sequence to collect air in different height areas. When the lifting platform 11 moves upward to the top, that is, after all the sampling mechanisms have completed sampling, at this time, the first wedge-shaped block 24 is at the front end position of the corresponding L-shaped hanging plate 40. When the lifting platform 11 moves downward to reset, it can make the sampling mechanism, that is, the collection cylinder 12, the long key plate 21, the square tube 27, etc. move downward synchronously. When the lifting platform 11 moves downward to make the exhaust elbow 15 insert into the corresponding air inlet 51, at this time, the square tube 27 can move downward to contact the upper end surface of the bottom support seat 4, and the square tube 27 stops moving downward under the block of the bottom support seat 4. When the lifting platform 11, the sampling mechanism, etc. continue to move downward, at this time, the two pry bars 30 can turn upward to make the first wedge-shaped block 24 move downward into the inner wall of the first square box 23. When the first wedge-shaped block 24 moves downward, it can disengage from the L-shaped hanging plate 40. The piston plate 13, the first wedge-shaped block 24, the long key plate 21, etc. 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, so as to inject the gas into the corresponding gas detector 50. The lower ends of the square tubes 27 are respectively rotatably connected with rolling balls 34. By setting the rolling balls 34, the friction with the bottom support seat 4 can be reduced when the square tube 27 moves backward with the long key plate 21 to reset. When the lifting platform 11 moves upward again, the square tube 27 can disengage from the bottom support seat 4, and the square tube 27, the first wedge-shaped 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-shaped block 24 can cooperate with the L-shaped hanging plate 40 again, that is, the device can be used cyclically for many times.

[0049] A plurality of vertical plates 44 are fixedly connected to the lower end surface of the lifting table 11. The inner walls of the lower ends of the vertical plates 44 are respectively rotatably connected with driving pulleys 45, and the inner walls of the upper ends of the vertical plates 44 are respectively rotatably connected with driven pulleys 47. The driving pulleys 45 and the driven pulleys 47 are connected by belts; the support seats 49 are respectively slidably connected to the lower end surface of the lifting table 11, and the rear ends of the driven pulleys 47 are respectively fixedly connected with second threaded rods 48 threadedly connected to the support seats 49, and the inner walls of the driving pulleys 45 are respectively slidably connected with long rotating shafts 42 fixedly connected to the first threaded rods 22.

[0050] As Figures 10-11As shown, the vertical plate 44 is used to support and install the driving pulley 45, driven pulley 47, etc. Bearing seats are respectively rotatably connected to the outer surface of the second threaded rod 48, and the bottom ends of the bearing seats are fixedly connected to the lower surface of the lifting platform 11. The second threaded rod 48 can only rotate stably at the lower end of the lifting platform 11 under the limitation of the bearing seats; the support seat 49 can be slidably connected to the lower surface of the lifting platform 11 in the front-back direction. When the second threaded rod 48 rotates, it can drive the support seat 49 to move forward or backward, that is, the position of the L-shaped hanging plate 40 can be adjusted, and there is a self-locking function under the threaded connection between the second threaded rod 48 and the support seat 49. When the second threaded rod 48 does not rotate, the positions of the corresponding support seat 49 and L-shaped hanging plate 40 are in a fixed state; Spline cylinders 46 are respectively fixedly connected to the rear end surfaces of the driving pulleys 45, and the spline cylinders 46 are respectively rotatably connected to the corresponding vertical plates 44. It is equivalent to that the driving pulley 45 is rotatably connected to the vertical plate 44. The long rotating shaft 42 and the spline cylinder 46 are in spline connection, so that the long rotating shaft 42 can slide back and forth on the inner wall of the spline cylinder 46, and when the long rotating shaft 42 rotates, it can drive the spline cylinder 46, driving pulley 45, etc. 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, it can drive the first threaded rod 22 to rotate. A first handle 43 is fixedly connected to the front end surface of the long rotating shaft 42. The function of the first handle 43 is to facilitate driving the long rotating shaft 42 to rotate; The pitch and rotation direction of the first threaded rod 22 are respectively the same as those of the second threaded rod 48. That is, when the first threaded rod 22 and the second threaded rod 48 rotate synchronously, they can drive the long key plate 21, first wedge-shaped block 24, support seat 49, L-shaped hanging plate 40, etc. to move forward or backward synchronously, so that the distance between the first wedge-shaped block 24 and the L-shaped hanging plate 40 always remains at a specified length at the initial position, that is, the piston plate 13 can move a specified distance and the collection cylinder 12 can collect a specified amount of air; When the first handle 43 rotates, it can drive the long rotating shaft 42, first threaded rod 22, driving pulley 45, driven pulley 47, 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, first wedge-shaped block 24, L-shaped hanging plate 40, etc. to move forward or backward synchronously. When the long key plate 21, first wedge-shaped block 24, etc. move forward or backward, the initial position can be changed, that is, the working height of the sampling mechanism can be changed, and air in different height areas can be sampled according to requirements.

[0051] When the present invention is in use, when starting the first motor 5 to move the lifting platform 11 upward, it can drive the sampling mechanism, the collection cylinder 12, etc. to move upward synchronously. When the lifting device ascends, 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 section. When the piston plate 13 moves forward, it will cause the corresponding collection cylinder 12 to sample and collect the air at different height sections, so as to separately collect the air at different height sections, replacing the traditional tube extraction and collection, preventing cross-contamination, and improving the detection accuracy; when the collection cylinder 12 moves downward to a specified position, that is, when the intake elbow 14 is inserted into the corresponding intake port 51, at this time the piston plate 13 can move backward, injecting the collected gas into the corresponding gas detector 50, so as to separately detect the gas samples at different height sections when the gas detector 50 is working, improving the detection accuracy. Since the boiling point of volatile organic compounds is relatively low and the temperature has a great influence on them, the height of volatile organic compounds suspended in the air will also change at different temperatures. This device can separately collect and detect the air at different height sections, and replace the traditional tube air extraction and collection to avoid cross-contamination and improve the detection accuracy. Moreover, this device works without a gas pump throughout the process. Since a certain amount of heat will be generated when the turbine rotates at high speed during the operation of the gas pump, volatile organic compounds may decompose at high temperatures, resulting in the collected samples no longer representing the true atmospheric state. By operating without a gas pump, the detection accuracy can be further improved to ensure the accuracy of the data.

Claims

1. An air gas environment detection device, comprising a base (1) and a bottom support base (4), characterized in that: The upper end of the bottom support base (4) is provided with a lifting platform (11). The bottom support base (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 groups of sampling mechanisms, and the lower end of the lifting platform (11) is also provided with multiple groups of delay mechanisms corresponding to the sampling mechanisms. Each sampling mechanism includes a collection cylinder (12), and a piston plate (13) is respectively arranged inside the collection cylinder (12). When the lifting device ascends, it can make the lifting platform (11) and the collection cylinder (12) move upward synchronously. When the lifting device ascends, through cooperation with the delay mechanism, the corresponding piston plate (13) can move forward at a specified height section, and the collection cylinder (12) can collect air at different height sections. The upper end of the base (1) is provided with multiple gas detectors (50) corresponding to the sampling mechanisms. When the lifting device descends, it can make the lifting platform (11) and the collection cylinder (12) 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).

2. The air gas environment detection device according to claim 1, characterized in that: The collection cylinder (12) is respectively provided with an intake elbow (14) and an exhaust elbow (15). A detachable filter (3) is respectively arranged on the intake elbow (14), and a tapered opening is respectively arranged on the exhaust elbow (15). The filter (3) includes a protective cover (53), and outer filter plates (52) and inner filter plates (54) are respectively arranged at the upper and lower ends of the protective cover (53). A brush (59) that can rotate and move up and down is arranged on the outer filter plate (52).

3. An air gas environment detection device according to claim 1, characterized in that: The lifting device includes a rotatable long threaded rod (7). A first driving plate (8) that is slidably connected to the bottom support base (4) is threadedly connected to the outer surface of the long threaded rod (7). A second driving plate (10) is slidably connected to the upper end of the lifting platform (11). The lifting device also includes a scissor expansion frame (9) that cooperates with the first driving plate (8) and the second driving plate (10). When the long threaded rod (7) rotates, a structure can be formed in which the scissor expansion frame (9) expands upward, the lifting platform (11) moves upward, and the second driving plate (10) moves forward.

4. An air gas environment detection device according to claim 3, characterized in that: The piston plates (13) are respectively slidably connected to the inner walls of the corresponding collection cylinders (12). Four-claw frames (19) are respectively fixedly connected to the front sides of the inner walls of the collection cylinders (12). A first threaded cylinder (18) is slidably connected to the inner wall at the center of the four-claw frame (19). The piston plates (13) are respectively fixedly connected to one side end faces of the corresponding first threaded cylinders (18). Each delay mechanism includes a rotatable first threaded rod (22). The first threaded rods (22) are respectively threadedly connected to the inner walls of the corresponding first threaded cylinders (18). Long key plates (21) that can move back and forth are respectively rotatably connected to the outer surfaces of the first threaded rods (22).

5. The air gas environment detection device according to claim 4, wherein: Limit cylinders (16) are respectively slidably connected to the inner walls of the left and right ends of the four-claw frame (19). Limit rods (20) are respectively fixedly connected to the left and right sides of the rear surface of the long key plate (21). The limit rods (20) are respectively slidably connected to the inner walls of the corresponding limit cylinders (16).

6. The air gas environment detection device according to claim 4, characterized in that: A plurality of extension rods (35) are respectively provided at the lower end of the second drive plate (10). Second square boxes (36) are respectively provided at the lower ends of the extension rods (35). First square boxes (23) are respectively provided on the long key plates (21). Second wedge-shaped blocks (37) that cooperate with the first square boxes (23) are respectively provided on the inner walls of the second square boxes (36). Second springs (38) that cooperate with the second wedge-shaped blocks (37) are respectively provided on the inner walls of the bottoms of the second square boxes (36).

7. The air gas environment detection device according to claim 6, characterized in that: First wedge-shaped blocks (24) are respectively provided on the inner walls of the first square boxes (23). First springs (26) that cooperate with the first wedge-shaped blocks (24) are respectively provided inside the first square boxes (23). A plurality of support seats (49) are respectively provided on the lower surface of the lifting platform (11). L-shaped hanging plates (40) that cooperate with the first wedge-shaped blocks (24) are fixedly connected to the left and right end surfaces of the support seats (49).

8. The air gas environment detection device according to claim 7, wherein: Extension pins (39) are respectively provided at the upper ends of the second wedge-shaped blocks (37). V-shaped plates (41) that cooperate with the extension pins (39) are respectively provided on the outer end faces of the two L-shaped hanging plates (40). Third springs (17) that cooperate with the piston plates (13) are respectively sleeved on the outer surfaces of the first threaded cylinders (18).

9. The air gas environment detection device according to claim 7, characterized in that: Square rods (28) are fixedly connected to the middle parts of the lower surfaces of the long key plates (21). Square cylinders (27) that can move up and down are respectively sleeved on the lower outer surfaces of the square rods (28). Pry bars (30) are respectively hinged to the left and right sides of the lower ends of the long key plates (21). First short pins (29) are fixedly connected to the front and rear end surfaces of the square cylinders (27). First key grooves (31) that cooperate with the first short pins (29) are respectively formed in the inner ends of the two pry bars (30). Pull rods (25) are fixedly connected to the lower surfaces of the first wedge-shaped blocks (24). Second short pins (32) are fixedly connected to the lower ends of the pull rods (25). Second key grooves (33) that cooperate with the second short pins (32) are respectively formed in the outer ends of the two pry bars (30).

10. An air gas environment detection device according to claim 7, characterized in that: A plurality of vertical plates (44) are fixedly connected to the lower surface of the lifting platform (11). Driving pulleys (45) are respectively rotatably connected to the inner walls of the lower ends of the vertical plates (44). Driven pulleys (47) are respectively rotatably connected to the inner walls of the upper ends of the vertical plates (44). The driving pulleys (45) and the driven pulleys (47) are connected by belts; the support seats (49) are respectively slidably connected to the lower surface of the lifting platform (11). Second threaded rods (48) that are threadedly connected to the support seats (49) are respectively fixedly connected to the rear ends of the driven pulleys (47). Long rotating shafts (42) fixedly connected to the first threaded rods (22) are respectively slidably connected to the inner walls of the driving pulleys (45).

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