Air environmental pollution detection and sampling system

Abstract

The present invention discloses an air pollution detection and sampling system, which relates to the field of environmental detection and includes a sampling tray, a lifting rod, a base, a power box, a collection pipe and an air supply mechanism. The interior of the sampling tray is a hollow structure, and the bottom center of the sampling tray is fixedly connected to the top of the lifting rod. The bottom of the lifting rod is fixedly mounted on the surface of the base. An exhaust pipe is fixedly provided near the middle of the interior of the sampling tray. The exhaust pipes are arranged in an equidistant annular pattern inside the sampling tray, and both ends of the exhaust pipe are sealed structures. In the present invention, several groups of fixed exhaust pipes are provided, and the several groups of fixed exhaust pipes are arranged in an equidistant linear pattern at the top edge of the sampling tray. When sampling, the fixed exhaust pipes can extract air from different directions in an area, and the gas enters the interior of the disc-shaped mixing chamber for mixing. Finally, the mixed air enters the interior of the collection pipe for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results.

Description

Technical Field

[0001] The present invention relates to the field of environmental detection, and in particular to an air environment pollution detection and sampling system. Background Art

[0002] Environmental monitoring involves determining environmental quality (or pollution levels) and its changing trends by measuring representative values of factors that influence it. The primary means of environmental monitoring include physical, chemical, and biological methods. Environmental monitoring tracks changes in environmental quality and determines its level by measuring the levels and emissions of various substances that impact humans and the environment. This provides a foundation and guarantee for environmental management and pollution control efforts.

[0003] In the prior art, when conducting indoor environmental testing, in order to detect the concentrations of free formaldehyde, radon, ammonia, etc. in the room, it is necessary to collect indoor air. In order to ensure the accuracy of the experimental results, it is usually necessary to randomly select points in a closed room, and the sampling points are dispersed to make the measurement results representative. However, the sampler in the prior art only uses one sampling tube when sampling, and the air extracted at a sampling point is only the air in a smaller range, which is less representative. After sampling at a sampling point, the sampling bottle needs to be replaced, which is more troublesome.

[0004] Therefore, it is necessary to invent an air environment pollution detection sampling system to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an air environment pollution detection and sampling system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an air pollution detection sampling system, comprising a sampling tray, a lifting rod, a base, a power box, a collecting tube and an air supply mechanism, the interior of the sampling tray is a hollow structure, and the bottom center of the sampling tray is fixedly connected to the top of the lifting rod, the bottom of the lifting rod is fixedly installed on the surface of the base, an exhaust pipe is fixedly provided near the middle of the interior of the sampling tray, the exhaust pipes are arranged in an equidistant ring shape inside the sampling tray, and both ends of the exhaust pipe are sealing structures, a first piston plate is slidingly provided inside the exhaust pipe, a horizontal moving rod is fixedly provided on the outer side surface of the first piston plate, a threaded groove is provided on the inner side surface of the first piston plate, and a threaded rod is provided inside the threaded groove, the inner end of the threaded rod extends out of the inner end edge of the exhaust pipe and is fixedly connected to the passive bevel gear, the passive bevel gear and the active bevel gear are meshed with each other for transmission, and the rotating shaft of the active bevel gear is connected to the driving motor for transmission, the driving motor is positioned The top end of the air filter presses on the top of the air filter press, and the bottom end of the air filter presses on the top of the air filter press, and the bottom end of the air filter press is screwed onto the top of the air filter press, and the top end of the air filter press is screwed onto the top of the air filter press.

[0007] During operation, the device is placed at a sampling point in the room, and then the driving motor is started. The driving motor will drive the active bevel gear to rotate, and the active bevel gear will drive the rotation of the threaded rod through the meshing transmission with the passive bevel gear, and the threaded rod will drive the first piston plate to move inside the exhaust pipe through the threaded connection with the threaded groove. The driving motor drives the active bevel gear to rotate back and forth repeatedly in the horizontal plane, thereby controlling the back and forth movement of the first piston plate inside the exhaust pipe. When the first piston plate moves toward the outer end of the exhaust pipe, the indoor air will enter the interior of the exhaust pipe through the fixed exhaust pipe for storage, and when the threaded rod drives the first piston plate to move toward the inner end of the exhaust pipe again, the air inside the exhaust pipe will enter the interior of the disc-shaped mixing chamber through the air outlet at the bottom of the exhaust pipe, and then enter the external threaded tube through the vent at the bottom of the disc-shaped mixing chamber, and finally enter the interior of the collection tube for collection. Since the internal threaded tube and the external threaded tube at the top of the collection tube are screwed together, the collection tube can be removed after sampling and taken back to the laboratory for testing.

[0008] In the present invention, a plurality of fixed exhaust pipes are provided, and the plurality of fixed exhaust pipes are arranged linearly and equidistantly at the top edge of the sampling disk. When sampling, the fixed exhaust pipes can extract air from different directions in an area, and the gas enters the interior of the disc-shaped mixing chamber for mixing. Finally, the mixed air enters the interior of the collection tube for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results.

[0009] The disc-shaped mixing chamber in the present invention is provided with an opening and closing mechanism for controlling the opening and closing of the vent holes. The disc-shaped mixing chamber can open the vent holes, thereby allowing the mixed air inside the disc-shaped mixing chamber to enter the interior of the collection tube through the external threaded tube for collection. After the collection is completed, the corresponding vent holes can be closed, thereby sealing the collection tube.

[0010] Preferably, the elastic sealing mechanism includes a rubber stopper and a push rod, the push rod is inserted into the inside of the collecting port at the top of the collecting tube, the bottom of the push rod is fixedly connected to the top of the rubber stopper, and the bottom of the rubber stopper is fixedly connected to the upper surface of the support plate fixedly connected to the inner wall of the collecting tube through a spring. The rubber stopper is a truncated cone structure, and the top surface diameter of the rubber stopper is smaller than the bottom surface diameter of the rubber stopper, and the diameter of the push rod is larger than the inner tube diameter of the external threaded tube. When the internal threaded tube at the top of the collecting tube and the bottom end of the external threaded tube are screwed together, the collecting port is in an open state.

[0011] During operation, the internal threaded tube at the top of the collecting tube and the bottom end of the external threaded tube are screwed together. At this time, the bottom end of the external threaded tube will squeeze the top end of the push rod, and then the bottom end of the push rod will squeeze the rubber plug, so that there is a gap between the rubber plug and the collecting port. At this time, the top of the collecting tube is in an open state, and the gas inside the disc-shaped mixing chamber can enter the interior of the collecting tube.

[0012] Preferably, the opening and closing mechanism includes an arc-shaped sealing plate and a driving mechanism, the arc-shaped sealing plate is an arc-shaped structure, and the radial width of the arc-shaped sealing plate is greater than the diameter of the vent hole, and when the arc-shaped sealing plate is located at the bottom of the disc-shaped mixing chamber, only one group of vent holes is not covered, and the inside of the power box is provided with a driving mechanism for controlling the rotation of the arc-shaped sealing plate inside the disc-shaped mixing chamber.

[0013] During operation, the driving mechanism controls the arc-shaped sealing plate to rotate at the bottom of the disc-shaped mixing chamber. When the arc-shaped sealing plate is located at the bottom of the disc-shaped mixing chamber, only one group of vent holes is uncovered, and thus one group of vent holes at the bottom of the disc-shaped mixing chamber is always in an open state. Thus, the air inside the disc-shaped mixing chamber can pass through the vent holes into the interior of the externally threaded tube, and finally enter the interior of the collecting tube to be collected. When all the gas is collected in the collecting tube, the arc-shaped sealing plate closes the vent holes corresponding to the group of collecting tubes. At the same time, the other group of vent holes is opened, and the mixed gas inside the disc-shaped mixing chamber enters the interior of the other group of collecting tubes to be collected.

[0014] The present invention opens the vent holes in sequence, and only one group of vent holes is opened each time, so that mixed air can be injected into the interior of several groups of collecting tubes in sequence. The interior of each collecting tube is respectively equipped with air from different sampling points. During the sampling process, there is no need to remove the collecting tube for replacement. The collecting tube can be removed after the sampling is completed, which can greatly save sampling time and greatly improve sampling efficiency.

[0015] Preferably, an arc-shaped limiting plate is fixedly provided on the top of the arc-shaped sealing plate, an annular slide rail is provided on the top of the disc-shaped gas mixing chamber, and the annular slide rail and the arc-shaped limiting plate are slidably connected to each other.

[0016] During operation, the annular slide rail and the arc-shaped limiting plate are slidably connected to each other to guide the arc-shaped sealing plate, so that the rotation of the arc-shaped sealing plate is more stable.

[0017] Preferably, the driving mechanism includes a movable plate, a circular gear ring, a rotating column and a driving rod. The rotating column is movably mounted on the bottom of the power box, the rotating column is vertically arranged, the rotating column is located at the central axis of the sampling disk, and the edge of the rotating column is fixedly provided with a circular gear ring. A movable plate is provided inside the power box, and a mounting groove is provided on the surface of the movable plate facing the circular gear ring. A hinge plate is movably hinged to the inside of the mounting groove through a torsion spring, and the tip of the hinge plate is tilted toward the right. A stop block is fixedly provided on the right side of the hinge plate inside the mounting groove. A driving rod is fixedly provided on the top edge of the rotating column. The free end of the driving rod is made of ferromagnetic material, and a magnet is provided inside the arc-shaped sealing plate. The movable plate is pushed back and forth in the horizontal plane by a push rod mechanism.

[0018] When working, the push rod mechanism will drive the movable plate to move back and forth in the horizontal direction. When the movable plate moves to the right, the hinged plate inside the mounting groove on the surface of the movable plate will move the teeth on the circular gear ring, thereby driving the circular gear ring and the rotating column to rotate in the horizontal plane, thereby driving the driving rod to rotate in the horizontal plane, so that the driving rod will attract the magnet inside the arc-shaped sealing plate and drive the arc-shaped sealing plate to rotate a certain angle inside the disc-shaped mixing chamber. When the push rod mechanism controls the movable plate to move to the left, the hinged plate inside the mounting groove will bypass the surface of the circular gear ring and be stored inside the mounting groove, and will not drive the rotation of the circular gear ring, and thus the position of the arc-shaped sealing plate will not change.

[0019] Preferably, the push rod mechanism includes an L-shaped tube, a movable plug and a push rod, the top end of the L-shaped tube is fixedly connected to the bottom of the sampling tray, the bottom end of the L-shaped tube is fixedly connected to the side edge of the power box, a fixed rod is fixed inside the horizontal tube of the L-shaped tube, the right side of the fixed rod is fixedly connected to the movable plug through a spring, the right side of the movable plug is fixedly connected to one end of the push rod, the other end of the push rod extends into the interior of the power box and is fixedly connected to one end of the movable plate, and the interior of the sampling tray is provided with an air supply mechanism for intermittently supplying air to the interior of the L-shaped tube.

[0020] During operation, when the air supply mechanism supplies air to the top of the L-shaped tube, the gas will push the movable plug to move toward the movable plate, and then the push rod fixedly connected to the movable plug will drive the movable plate to move to the right. After the air supply mechanism stops supplying air to the inside of the L-shaped tube, the gas inside the L-shaped tube gradually loses, and then the movable plug will move toward the fixed rod under the action of the spring fixed to it, and then the push rod drives the movable plate to move to the left. At this time, the arc-shaped sealing plate will not rotate inside the disc-shaped mixing chamber.

[0021] Preferably, the air supply mechanism includes an air supply pipe and a second piston plate, the air supply pipe is fixedly connected to the inside of the sampling plate near the outer edge, and the outer end of the horizontally movable rod passes through the outer end of the exhaust pipe and extends into the interior of the second piston plate and is fixedly connected to the second piston plate, and the outer end of the air supply pipe is connected to the top end of the L-shaped tube.

[0022] When the first piston plate moves toward the inner end of the air extraction pipe, the indoor air will enter the interior of the air extraction pipe through the fixed air extraction pipe for storage, and at the same time, the horizontal moving rod will drive the second piston plate to move toward the outer end of the air supply pipe. At this time, the air inside the air supply pipe will enter the interior of the L-shaped tube through the squeezing of the second piston plate, driving the movable plate to move right, and driving the arc sealing plate to rotate a certain angle to open a group of vents. Conversely, when the first piston plate moves toward the inner end of the air extraction pipe, the horizontal moving rod will drive the second piston plate to move toward the inner end of the air supply pipe, thereby extracting the air inside the L-shaped tube, and the movable plug will drive the push rod to move in the direction close to the movable plug, thereby causing the movable plate to move to the left. At this time, the arc sealing plate will not rotate, and at the same time, the first piston plate will squeeze the air inside the air extraction pipe into the interior of the disc-shaped mixing chamber for mixing and entering the interior of the collection pipe through the vent holes for collection, and so on and so forth until the air is collected in all the collection pipes;

[0023] In the present invention, when indoor air enters the interior of the exhaust pipe, the air vent at the bottom of the disc-shaped mixing chamber will be opened. Then, when the first piston plate squeezes the gas inside the exhaust pipe into the interior of the disc-shaped mixing chamber, the air can directly enter the interior of the collection pipe through the air vent to be collected, thereby realizing the collection of air in the bottom collection pipe in sequence, without the need to manually unscrew the collection pipe frequently and replace it with a new collection pipe to hold the air, thereby saving time and improving work efficiency.

[0024] Preferably, a magnet is provided inside the second piston plate near the top edge, a sliding cavity is opened inside the top plate of the sampling disk, a magnet ring is provided for sliding inside the sliding cavity, a limiting ring is provided for sliding inside the horizontal tube of the fixed exhaust pipe, the outer end of the limiting ring is fixedly connected to a movable exhaust pipe, the movable exhaust pipe extends out of the outer port of the fixed exhaust pipe, and an iron block that attracts the magnet ring is fixedly provided on the outer end edge of the movable exhaust pipe.

[0025] During operation, when the first piston plate moves toward the outer end of the exhaust pipe, the horizontal moving rod will drive the second piston plate to move toward a position close to the edge of the sampling disk. At this time, the magnet on the second piston plate will drive the magnet ring to move toward the edge of the sampling disk. The magnet ring will attract the iron block at the end of the movable exhaust pipe and drive the movable exhaust pipe to gradually be drawn out from the inside of the fixed exhaust pipe, so that the movable exhaust pipe can extract air at different positions in the horizontal plane, expand the sampling area, and make the extracted air more representative.

[0026] Preferably, the magnet ring is sleeved on the wave rod inside the sliding cavity, the wave rod is arranged horizontally, and the movable exhaust pipe and the limiting ring are fixedly connected by a rubber tube, and the inside of the movable exhaust pipe and the limiting ring are fixed with fixed rods, and the two groups of fixed rods are fixedly connected by springs.

[0027] During operation, when the magnet ring moves with the magnet on the second piston plate, the magnet ring will jump up and down on the wave rod, causing the outer end of the movable exhaust pipe to shake up and down in the vertical plane, thereby expanding the sampling area of the movable exhaust pipe in the vertical plane, making the sample more representative.

[0028] Preferably, rollers are movably provided on the outer edge of the arc-shaped sealing plate, and the rollers are arranged in an equidistant ring at the edge of the disc-shaped gas mixing chamber, and the central axis of the rollers is perpendicular to the bottom of the disc-shaped gas mixing chamber.

[0029] When working, the roller can convert the sliding friction between the arc-shaped sealing plate and the side wall of the disc-shaped mixing chamber into rolling friction between the roller and the inner wall of the disc-shaped mixing chamber, thereby greatly reducing the friction resistance and making the rotation of the arc-shaped sealing plate inside the disc-shaped mixing chamber smoother.

[0030] The technical effects and advantages of the present invention are as follows:

[0031] The driving motor in the present invention drives the active bevel gear to rotate back and forth repeatedly in the horizontal plane, thereby controlling the back and forth movement of the first piston plate inside the exhaust pipe. When the first piston plate moves toward the outer end of the exhaust pipe, the indoor air will enter the interior of the exhaust pipe through the fixed exhaust pipe for storage. When the threaded rod drives the first piston plate to move in the direction close to the inner end of the exhaust pipe again, the air inside the exhaust pipe will enter the interior of the disc-shaped mixing chamber through the air outlet at the bottom of the exhaust pipe, and then enter the external threaded tube through the vent hole at the bottom of the disc-shaped mixing chamber, and finally enter the interior of the collection tube for collection. Since the internal threaded tube and the external threaded tube at the top of the collection tube are screwed together, the collection tube can be removed after sampling and taken back to the laboratory for testing.

[0032] Several groups of fixed exhaust pipes are arranged linearly and equidistantly on the top edge of the sampling disk. When sampling, the fixed exhaust pipes can extract air from different directions in an area and pass the gas into the disc-shaped mixing chamber for mixing. Finally, the mixed air enters the collection tube for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results.

[0033] The present invention opens the vent holes in sequence, and only one group of vent holes is opened each time, so that mixed air can be injected into the interior of several groups of collecting tubes in sequence. The interior of each collecting tube is respectively equipped with air from different sampling points. During the sampling process, there is no need to remove the collecting tube for replacement. The collecting tube can be removed after the sampling is completed, which can greatly save sampling time and greatly improve sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the present invention.

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0036] Figure 3 Schematic diagram of the internal structure of the sampling tray.

[0037] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0038] Figure 5 for Figure 3 Enlarged view of point C in the middle.

[0039] Figure 6 for Figure 3 Enlarged view of point D in the middle.

[0040] Figure 7Schematic diagram of the internal structure of the arc-shaped sealing plate in the disc-shaped mixing chamber.

[0041] Figure 8 for Figure 7 Enlarged view of point E in the middle.

[0042] Figure 9 It is a structural diagram of the movable plate.

[0043] In the figure: sampling plate 1, lifting rod 2, base 3, L-shaped tube 4, power box 5, collecting tube 6, fixed exhaust tube 7, movable exhaust tube 9, iron block 10, passive bevel gear 11, active bevel gear 12, storage chamber 13, wave rod 14, air supply pipe 15, first piston plate 16, movable plate 17, horizontal moving rod 18, threaded groove 19, threaded rod 20, external threaded tube 21, rubber plug 22, push rod 23, fixed rod 24, movable plug 25, push rod 26, circular gear ring 27, rotating column 28, limit ring 29, rubber tube 30, magnet ring 31, sliding chamber 32, magnet 33, exhaust tube 34, disc-shaped mixing chamber 35, annular slide rail 36, drive rod 37, arc-shaped sealing plate 38, arc-shaped limit plate 39, vent 40, stopper 41, hinged plate 42, second piston plate 43, exhaust port 44, collecting port 45. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] The present invention provides Figure 1-9The air pollution detection sampling system shown in the figure includes a sampling tray 1, a lifting rod 2, a base 3, a power box 5, a collection tube 6 and an air supply mechanism. The interior of the sampling tray 1 is a hollow structure, and the bottom center of the sampling tray 1 is fixedly connected to the top of the lifting rod 2. The bottom of the lifting rod 2 is fixedly mounted on the surface of the base 3. An exhaust pipe 34 is fixed near the middle of the interior of the sampling tray 1. The exhaust pipes 34 are arranged in an equidistant ring inside the sampling tray 1. The two ends of the exhaust pipe 34 are sealed structures. The interior of the exhaust pipe 34 is provided with a sliding The first piston plate 16 has a horizontal moving rod 18 fixedly provided on its outer side surface. A threaded groove 19 extending into the interior of the horizontal moving rod 18 is provided on the inner side surface of the first piston plate 16. A threaded rod 20 is provided inside the threaded groove 19. The inner end of the threaded rod 20 extends out of the inner end edge of the exhaust pipe 34 and is fixedly connected to the passive bevel gear 11. The passive bevel gear 11 and the active bevel gear 12 are meshed with each other for transmission, and the rotating shaft of the active bevel gear 12 is connected to the driving motor for transmission. The driving motor is located inside the collecting tube 1. In the cavity 13, an air extraction port 44 is provided at the top of the inner end of the air extraction pipe 34, and the upper end of the air extraction port 44 extends out of the top edge of the sampling tray 1, and the air extraction port 44 is connected to the bottom end of the fixed air extraction pipe 7 provided on the upper surface of the sampling tray 1. A disc-shaped air mixing chamber 35 is provided in the bottom wall of the sampling tray 1. The disc-shaped air mixing chamber 35 is connected to the inside of the air extraction pipe 34 through the air outlet at the bottom of the inner end of the air extraction pipe 34. Ventilation holes 40 are evenly provided on the bottom edge of the disc-shaped air mixing chamber 35. The power box 5 is fixedly connected to the sampling tray 1. The bottom of the sampling tray 1 is fixed with an external threaded tube 21 which is interconnected with the vent hole 40. The bottom end of the external threaded tube 21 extends out of the bottom edge of the power box 5 and is screwed to the internal threaded tube at the top of the collecting tube 6. The top of the collecting tube 6 is provided with an elastic sealing mechanism. The vent holes 40 are provided in several groups, and the several groups of vent holes 40 are arranged in an equidistant ring at the bottom of the disc-shaped mixing chamber 35. The inside of the disc-shaped mixing chamber 35 is provided with an opening and closing mechanism for controlling the opening and closing of the vent holes 40, and the inside of the air extraction port 44 and the air outlet are both provided with a one-way valve.

[0046] When working, the device is placed at the sampling point in the room, and then the driving motor is started. The driving motor will drive the active bevel gear 12 to rotate, and the active bevel gear 12 will drive the rotation of the threaded rod 20 through the meshing transmission with the passive bevel gear 11. The threaded rod 20 will drive the first piston plate 16 to move inside the exhaust pipe 34 through the threaded connection with the thread groove 19. The driving motor drives the active bevel gear 12 to rotate back and forth repeatedly in the horizontal plane, thereby controlling the back and forth movement of the first piston plate 16 inside the exhaust pipe 34. When the first piston plate 16 moves toward the outer end of the exhaust pipe 34, the indoor The air will enter the interior of the exhaust pipe 34 through the fixed exhaust pipe 7 for storage. When the threaded rod 20 drives the first piston plate 16 to move toward the inner end of the exhaust pipe 34 again, the air inside the exhaust pipe 34 will enter the interior of the disc-shaped mixing chamber 35 through the air outlet at the bottom of the exhaust pipe 34, and then enter the external threaded pipe 21 through the air vent 40 at the bottom of the disc-shaped mixing chamber 35, and finally enter the interior of the collection pipe 6 for collection. Since the internal threaded pipe and the external threaded pipe 21 at the top of the collection pipe 6 are screwed together, the collection pipe 6 can be removed after sampling and taken back to the laboratory for testing.

[0047] In the present invention, a plurality of fixed exhaust pipes 7 are provided, and the plurality of fixed exhaust pipes 7 are arranged linearly and equidistantly at the top edge of the sampling plate 1. Thus, during sampling, the fixed exhaust pipes 7 can extract air from different directions within an area and introduce the gas into the disc-shaped mixing chamber 35 for mixing. Finally, the mixed air enters the collection tube 6 for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results.

[0048] The disc-shaped mixing chamber 35 of the present invention is provided with an opening and closing mechanism for controlling the opening and closing of the vent holes 40. The disc-shaped mixing chamber 35 can open the vent holes 40, thereby allowing the mixed air inside the disc-shaped mixing chamber 35 to enter the interior of the collecting tube 6 through the external threaded tube 21 for collection. After the collection is completed, the corresponding vent holes 40 can be closed, thereby sealing the collecting tube 6.

[0049] The elastic sealing mechanism includes a rubber stopper 22 and a push rod 23. The push rod 23 is inserted into the inside of the collecting port 45 at the top of the collecting tube 6. The bottom of the push rod 23 is fixedly connected to the top of the rubber stopper 22. The bottom of the rubber stopper 22 is fixedly connected to the upper surface of the support plate fixedly connected to the inner wall of the collecting tube 6 through a spring. The rubber stopper 22 is a truncated cone structure, and the top surface diameter of the rubber stopper 22 is smaller than the bottom surface diameter of the rubber stopper 22, and the diameter of the push rod 23 is larger than the inner tube diameter of the external threaded tube 21. When the internal threaded tube at the top of the collecting tube 6 and the bottom end of the external threaded tube 21 are screwed together, the collecting port 45 is in an open state.

[0050] During operation, the internal threaded tube at the top of the collecting tube 6 and the bottom end of the external threaded tube 21 are screwed together. At this time, the bottom end of the external threaded tube 21 will squeeze the top end of the push rod 23, and then the bottom end of the push rod 23 will squeeze the rubber plug 22, so that there is a gap between the rubber plug 22 and the collecting port 45. At this time, the top of the collecting tube 6 is in an open state, and the gas inside the disc-shaped mixing chamber 35 can enter the interior of the collecting tube 6.

[0051] The opening and closing mechanism includes an arc-shaped sealing plate 38 and a driving mechanism. The arc-shaped sealing plate 38 is an arc-shaped structure, and the radial width of the arc-shaped sealing plate 38 is greater than the diameter of the vent holes 40. When the arc-shaped sealing plate 38 is located at the bottom of the disc-shaped mixing chamber 35, only one group of vent holes 40 is not covered. The power box 5 is provided with a driving mechanism inside to control the rotation of the arc-shaped sealing plate 38 inside the disc-shaped mixing chamber 35.

[0052] During operation, the driving mechanism controls the arc-shaped sealing plate 38 to rotate at the bottom of the disc-shaped mixing chamber 35. When the arc-shaped sealing plate 38 is located at the bottom of the disc-shaped mixing chamber 35, only one group of vent holes 40 is uncovered. Thus, there is always one group of vent holes 40 at the bottom of the disc-shaped mixing chamber 35 in an open state. Thus, the air inside the disc-shaped mixing chamber 35 can pass through the vent holes 40 and enter the interior of the external threaded tube 21, and finally enter the interior of the collecting pipe 6 to be collected. When the interior of the collecting pipe 6 has collected all the gas, the arc-shaped sealing plate 38 closes the vent holes 40 corresponding to the group of collecting pipes 6. At the same time, the other group of vent holes 40 will be opened. Then, the mixed gas inside the disc-shaped mixing chamber 35 will enter the interior of the other group of collecting pipes 6 to be collected.

[0053] The present invention opens the vent holes 40 in sequence, and only one group of vent holes 40 is opened each time, so that mixed air can be injected into the interior of several groups of collecting tubes 6 in sequence. The interior of each collecting tube 6 is respectively equipped with air from different sampling points. During the sampling process, there is no need to remove the collecting tube 6 for replacement. The collecting tube 6 can be removed after the sampling is completed, which can greatly save sampling time and greatly improve sampling efficiency.

[0054] An arc-shaped limiting plate 39 is fixedly provided on the top of the arc-shaped sealing plate 38 , and an annular slide rail 36 is provided on the top of the disc-shaped gas mixing chamber 35 . The annular slide rail 36 and the arc-shaped limiting plate 39 are slidably connected to each other.

[0055] During operation, the annular slide rail 36 and the arc-shaped limiting plate 39 are slidably connected to each other to guide the arc-shaped sealing plate 38, so that the rotation of the arc-shaped sealing plate 38 is more stable.

[0056] The driving mechanism includes a movable plate 17, a circular gear ring 27, a rotating column 28 and a driving rod 37. The rotating column 28 is movably installed at the bottom of the power box 5. The rotating column 28 is vertically arranged. The rotating column 28 is located at the central axis of the sampling disk 1, and the edge of the rotating column 28 is fixed with a circular gear ring 27. A movable plate 17 is provided inside the power box 5. The surface of the movable plate 17 facing the circular gear ring 27 is provided with a mounting groove. The interior of the mounting groove is movably hinged with a hinge plate 42 through a torsion spring. The tip of the hinge plate 42 is tilted toward the right. A stopper 41 is fixed on the right side of the hinge plate 42 inside the mounting groove. A driving rod 37 is fixed on the top edge of the rotating column 28. The free end of the driving rod 37 is made of ferromagnetic material, and a magnet 33 is provided inside the arc-shaped sealing plate 38. The movable plate 17 is pushed back and forth in the horizontal plane by a push rod mechanism.

[0057] When working, the push rod mechanism will drive the movable plate 17 to move back and forth in the horizontal direction. When the movable plate 17 moves to the right, the hinged plate 42 inside the mounting groove on the surface of the movable plate 17 will move the teeth on the circular gear ring 27, thereby driving the circular gear ring 27 and the rotating column 28 to rotate in the horizontal plane, thereby driving the driving rod 37 to rotate in the horizontal plane, so that the driving rod 37 will attract the magnet 33 inside the arc-shaped sealing plate 38 and drive the arc-shaped sealing plate 38 to rotate a certain angle inside the disc-shaped mixing chamber 35. When the push rod mechanism controls the movable plate 17 to move to the left, the hinged plate 42 inside the mounting groove will bypass the surface of the circular gear ring 27 and be stored inside the mounting groove, and will not drive the rotation of the circular gear ring 27, and thus the position of the arc-shaped sealing plate 38 will not change.

[0058] The push rod mechanism includes an L-shaped tube 4, a movable plug 25 and a push rod 26. The top of the L-shaped tube 4 is fixedly connected to the bottom of the sampling tray 1, and the bottom end of the L-shaped tube 4 is fixedly connected to the side edge of the power box 5. A fixed rod 24 is fixed inside the horizontal tube of the L-shaped tube 4. The right side of the fixed rod 24 is fixedly connected to the movable plug 25 through a spring. The right side of the movable plug 25 is fixedly connected to one end of the push rod 26. The other end of the push rod 26 extends into the interior of the power box 5 and is fixedly connected to one end of the movable plate 17. The interior of the sampling tray 1 is provided with an air supply mechanism for intermittently supplying air to the interior of the L-shaped tube 4.

[0059] During operation, when the air supply mechanism supplies air to the top of the L-shaped tube 4, the gas will push the movable plug 25 to move toward the movable plate 17, and then the push rod 26 fixedly connected to the movable plug 25 will drive the movable plate 17 to move to the right. After the air supply mechanism stops supplying air to the inside of the L-shaped tube 4, the gas inside the L-shaped tube 4 gradually loses, and then the movable plug 25 will move toward the fixed rod 24 under the action of the spring fixed thereto, and then the push rod 26 drives the movable plate 17 to move to the left. At this time, the arc-shaped sealing plate 38 will not rotate inside the disc-shaped mixing chamber 35.

[0060] The air supply mechanism includes an air supply pipe 15 and a second piston plate 43. The air supply pipe 15 is fixedly connected to the inside of the sampling disk 1 near the outer edge, and the outer end of the horizontal moving rod 18 passes through the outer end of the exhaust pipe 34 and extends into the interior of the second piston plate 43 and is fixedly connected to the second piston plate 43. The outer end of the air supply pipe 15 is connected to the top end of the L-shaped tube 4.

[0061] During operation, when the first piston plate 16 moves toward the outer end of the exhaust pipe 34, the indoor air will enter the interior of the exhaust pipe 34 through the fixed exhaust pipe 7 for storage. At the same time, the horizontal moving rod 18 will drive the second piston plate 43 to move toward the outer end of the air supply pipe 15. At this time, the air inside the air supply pipe 15 will enter the interior of the L-shaped tube 4 through the squeezing of the second piston plate 43, driving the movable plate 17 to move to the right, and driving the arc-shaped sealing plate 38 to rotate a certain angle to open a group of vents 40. Conversely, when the first piston plate 16 moves toward the inner end near the exhaust pipe 34, the air inside the air supply pipe 15 will enter the interior of the L-shaped tube 4 through the squeezing of the second piston plate 43. When moving to the left, the horizontal moving rod 18 will drive the second piston plate 43 to move toward the inner end of the air supply pipe 15, thereby extracting the air inside the L-shaped tube 4. The movable plug 25 will drive the push rod 26 to move toward the movable plug 25, thereby causing the movable plate 17 to move to the left. At this time, the arc-shaped sealing plate 38 will not rotate. At the same time, the first piston plate 16 will squeeze the air inside the exhaust pipe 34 into the inside of the disc-shaped mixing chamber 35 for mixing and then enter the inside of the collection pipe 6 through the vent hole 40 for collection. This cycle repeats until all the air in the collection pipes 6 is collected.

[0062] In the present invention, when indoor air enters the interior of the exhaust pipe 34, the air vent 40 at the bottom of the disc-shaped mixing chamber 35 will be opened. Then, when the first piston plate 16 squeezes the gas inside the exhaust pipe 34 into the interior of the disc-shaped mixing chamber 35, the air can directly enter the interior of the collecting pipe 6 through the air vent 40 for collection, thereby realizing the collection of air in the bottom collecting pipe 6 in sequence, without the need to manually unscrew the collecting pipe 6 frequently and replace it with a new collecting pipe 6 to hold the air, thereby saving time and improving work efficiency.

[0063] A magnet 33 is provided inside the second piston plate 43 near the top edge, a sliding cavity 32 is opened inside the top plate of the sampling disk 1, a magnet ring 31 is provided for sliding inside the sliding cavity 32, a limiting ring 29 is provided for sliding inside the horizontal tube of the fixed exhaust pipe 7, the outer end of the limiting ring 29 is fixedly connected to a movable exhaust pipe 9, the movable exhaust pipe 9 extends out of the outer port of the fixed exhaust pipe 7, and an iron block 10 that attracts the magnet ring 31 is fixed on the outer end edge of the movable exhaust pipe 9.

[0064] During operation, when the first piston plate 16 moves toward the outer end of the exhaust pipe 34, the horizontal moving rod 18 will drive the second piston plate 43 to move to a position close to the edge of the sampling disk 1. At this time, the magnet 33 on the second piston plate 43 will drive the magnet ring 31 to move toward the edge of the sampling disk 1. The magnet ring 31 will attract the iron block 10 at the end of the movable exhaust pipe 9 and drive the movable exhaust pipe 9 to gradually be drawn out from the inside of the fixed exhaust pipe 7, so that the movable exhaust pipe 9 can extract air at different positions in the horizontal plane, expand the sampling area, and make the extracted air more representative.

[0065] The magnet ring 31 is sleeved on the wave rod 14 inside the sliding cavity 32. The wave rod 14 is arranged horizontally, and the movable exhaust pipe 9 and the limit ring 29 are fixedly connected by a rubber tube 30. The inside of the movable exhaust pipe 9 and the limit ring 29 are fixed with fixed rods 24, and the two groups of fixed rods 24 are fixedly connected by springs.

[0066] During operation, when the magnet ring 31 moves along with the magnet 33 on the second piston plate 43, the magnet ring 31 will jump up and down on the wave rod 14, thereby causing the outer end of the movable exhaust pipe 9 to shake up and down in the vertical plane, thereby expanding the sampling area of the movable exhaust pipe 9 in the vertical plane, making the sample more representative.

[0067] Rollers are movably provided on the outer edge of the arc-shaped sealing plate 38 . The rollers are arranged in an equidistant ring shape at the edge of the disc-shaped mixing chamber 35 , and the central axis of the rollers is perpendicular to the bottom of the disc-shaped mixing chamber 35 .

[0068] During operation, the roller can convert the sliding friction between the arc-shaped sealing plate 38 and the side wall of the disc-shaped mixing chamber 35 into rolling friction between the roller and the inner wall of the disc-shaped mixing chamber 35, thereby greatly reducing the friction resistance and making the rotation of the arc-shaped sealing plate 38 inside the disc-shaped mixing chamber 35 smoother.

[0069] Working principle: When working, the device is placed at the sampling point in the room, and then the driving motor is started. The driving motor will drive the active bevel gear 12 to rotate, and the active bevel gear 12 will drive the rotation of the threaded rod 20 through the meshing transmission with the passive bevel gear 11. The threaded rod 20 will drive the first piston plate 16 to move inside the exhaust pipe 34 through the threaded connection with the thread groove 19. The driving motor drives the active bevel gear 12 to rotate back and forth repeatedly in the horizontal plane, thereby controlling the back and forth movement of the first piston plate 16 inside the exhaust pipe 34. When the first piston plate 16 moves toward the outer end of the exhaust pipe 34, the room is closed. The air inside will enter the interior of the exhaust pipe 34 through the fixed exhaust pipe 7 for storage, and when the threaded rod 20 drives the first piston plate 16 to move toward the inner end of the exhaust pipe 34 again, the air inside the exhaust pipe 34 will enter the interior of the disc-shaped mixing chamber 35 through the air outlet at the bottom of the exhaust pipe 34, and then enter the external threaded pipe 21 through the air vent 40 at the bottom of the disc-shaped mixing chamber 35, and finally enter the interior of the collection pipe 6 for collection. Since the internal threaded pipe and the external threaded pipe 21 at the top of the collection pipe 6 are screwed together, the collection pipe 6 can be removed after sampling and taken back to the laboratory for testing.

[0070] In the present invention, a plurality of fixed exhaust pipes 7 are provided, and the plurality of fixed exhaust pipes 7 are arranged linearly and equidistantly at the top edge of the sampling plate 1. Thus, during sampling, the fixed exhaust pipes 7 can extract air from different directions within an area and introduce the gas into the disc-shaped mixing chamber 35 for mixing. Finally, the mixed air enters the collection tube 6 for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results.

[0071] The disc-shaped mixing chamber 35 of the present invention is provided with an opening and closing mechanism for controlling the opening and closing of the vent holes 40. The disc-shaped mixing chamber 35 can open the vent holes 40, thereby allowing the mixed air inside the disc-shaped mixing chamber 35 to enter the interior of the collecting tube 6 through the external threaded tube 21 for collection. After the collection is completed, the corresponding vent holes 40 can be closed, thereby sealing the collecting tube 6.

Claims

1. An air pollution detection and sampling system, comprising a sampling plate (1), a lifting rod (2), a base (3), a power box (5), a collection tube (6) and an air supply mechanism, characterized in that: The interior of the sampling tray (1) is a hollow structure, and the bottom center of the sampling tray (1) is fixedly connected to the top of the lifting rod (2). The bottom of the lifting rod (2) is fixedly mounted on the surface of the base (3). An air extraction pipe (34) is fixedly provided near the middle of the interior of the sampling tray (1). The air extraction pipes (34) are arranged in an equidistant annular pattern inside the sampling tray (1). Both ends of the air extraction pipes (34) are sealed structures. A first piston plate (16) is provided inside the air extraction pipe (34) for sliding. A horizontal piston is fixedly provided on the outer side of the first piston plate (16). The moving rod (18) and the inner side surface of the first piston plate (16) are provided with a thread groove (19) which penetrates into the interior of the horizontal moving rod (18). The thread groove (19) is provided with a threaded rod (20). The inner end of the threaded rod (20) extends out of the inner end edge of the exhaust pipe (34) and is fixedly connected to the passive bevel gear (11). The passive bevel gear (11) and the active bevel gear (12) are meshed with each other for transmission, and the rotating shaft of the active bevel gear (12) is connected to the driving motor for transmission. The driving motor is located in the receiving chamber (13) inside the sampling plate (1); An air extraction port (44) is provided at the top of the inner end of the air extraction pipe (34), and the upper end of the air extraction port (44) extends out of the top edge of the sampling plate (1), and the air extraction port (44) is communicated with the bottom end of a fixed air extraction pipe (7) provided on the upper surface of the sampling plate (1). A disc-shaped air mixing chamber (35) is provided in the bottom wall of the sampling plate (1), and the disc-shaped air mixing chamber (35) is communicated with the inside of the air extraction pipe (34) through the air outlet at the bottom of the inner end of the air extraction pipe (34). Ventilation holes (40) are evenly provided on the bottom edge of the disc-shaped air mixing chamber (35). The power box (5) is fixedly connected to the bottom of the sampling plate (1). The bottom of the sampling disc (1) is fixed with an external threaded tube (21) that is interconnected with the vent hole (40), the bottom end of the external threaded tube (21) extends out of the bottom edge of the power box (5) and is screwed to the internal threaded tube at the top of the collection tube (6), and the top of the collection tube (6) is provided with an elastic sealing mechanism, the vent holes (40) are provided in a plurality of groups, and the plurality of groups of vent holes (40) are arranged in an equidistant annular pattern at the bottom of the disc-shaped mixing chamber (35), and an opening and closing mechanism for controlling the opening and closing of the vent holes (40) is provided inside the disc-shaped mixing chamber (35), and a one-way valve is provided inside the air extraction port (44) and the air outlet; The air supply mechanism includes an air supply pipe (15) and a second piston plate (43), wherein the air supply pipe (15) is fixedly connected to a position near the outer edge of the inner portion of the sampling plate (1), and the outer end of the horizontal moving rod (18) passes through the outer end of the air extraction pipe (34) and extends into the inner portion of the second piston plate (43) and is fixedly connected to the second piston plate (43), and the outer end of the air supply pipe (15) is communicated with the top end of the L-shaped tube (4); A magnet (33) is provided near the top edge of the interior of the second piston plate (43); a sliding cavity (32) is provided inside the top plate of the sampling disc (1); a magnet ring (31) is provided inside the sliding cavity (32); a limit ring (29) is provided inside the horizontal tube of the fixed air extraction tube (7); a movable air extraction tube (9) is fixedly connected to the outer end of the limit ring (29); the movable air extraction tube (9) extends out of the outer end of the fixed air extraction tube (7); and an iron block (10) that attracts the magnet ring (31) is fixedly provided on the outer end edge of the movable air extraction tube (9); The magnet ring (31) is sleeved on the wave rod (14) inside the sliding cavity (32), the wave rod (14) is arranged horizontally, and the movable air extraction pipe (9) and the limiting ring (29) are fixedly connected by a rubber tube (30), and the inside of the movable air extraction pipe (9) and the limiting ring (29) are fixedly provided with a fixing rod (24), and the two sets of fixing rods (24) are fixedly connected by a spring.

2. The air pollution detection and sampling system according to claim 1, characterized in that: The elastic sealing mechanism comprises a rubber plug (22) and a push rod (23), the push rod (23) being inserted into the interior of the collecting port (45) at the top of the collecting tube (6), the bottom of the push rod (23) being fixedly connected to the top of the rubber plug (22), the bottom of the rubber plug (22) being fixedly connected to the upper surface of a support plate fixedly connected to the inner wall of the collecting tube (6) via a spring, the rubber plug (22) being a truncated cone structure, the top surface diameter of the rubber plug (22) being smaller than the bottom surface diameter of the rubber plug (22), and the diameter of the push rod (23) being larger than the inner tube diameter of the externally threaded tube (21), and when the inner threaded tube at the top of the collecting tube (6) and the bottom end of the externally threaded tube (21) are screwed together, the collecting port (45) is in an open state.

3. The air pollution detection and sampling system according to claim 2, characterized in that: The opening and closing mechanism comprises an arc-shaped sealing plate (38) and a driving mechanism. The arc-shaped sealing plate (38) is an arc-shaped structure, and the radial width of the arc-shaped sealing plate (38) is greater than the diameter of the vent holes (40). When the arc-shaped sealing plate (38) is located at the bottom of the disc-shaped mixing chamber (35), only one group of vent holes (40) is not covered. The driving mechanism for controlling the arc-shaped sealing plate (38) to rotate inside the disc-shaped mixing chamber (35) is provided inside the power box (5); an arc-shaped limiting plate (39) is fixedly provided on the top of the arc-shaped sealing plate (38), and an annular slide rail (36) is provided on the top of the disc-shaped mixing chamber (35). The annular slide rail (36) and the arc-shaped limiting plate (39) are slidably connected to each other.

4. The air pollution detection and sampling system according to claim 3, characterized in that: The driving mechanism comprises a movable plate (17), a circular gear ring (27), a rotating column (28) and a driving rod (37), wherein the rotating column (28) is movably mounted on the bottom of the power box (5), the rotating column (28) is arranged vertically, the rotating column (28) is located at the central axis of the sampling plate (1), and the circular gear ring (27) is fixedly provided on the edge of the rotating column (28), the interior of the power box (5) is provided with a movable plate (17), and the surface of the movable plate (17) facing the circular gear ring (27) is provided with a A mounting groove is provided, wherein a hinge plate (42) is movably hinged inside the mounting groove through a torsion spring, the tip of the hinge plate (42) is tilted toward the right, a stopper (41) is fixedly provided inside the mounting groove on the right side of the hinge plate (42), a driving rod (37) is fixedly provided on the top edge of the rotating column (28), the free end of the driving rod (37) is made of ferromagnetic material, and a magnet (33) is provided inside the arc-shaped sealing plate (38), and the movable plate (17) is pushed by a push rod mechanism to move back and forth in a horizontal plane.

5. The air pollution detection and sampling system according to claim 4, characterized in that: The push rod mechanism comprises an L-shaped tube (4), a movable plug (25) and a push rod (26), the top end of the L-shaped tube (4) is fixedly connected to the bottom of the sampling tray (1), the bottom end of the L-shaped tube (4) is fixedly connected to the side edge of the power box (5), a fixed rod (24) is fixedly provided inside the horizontal tube of the L-shaped tube (4), the right side of the fixed rod (24) is fixedly connected to the movable plug (25) through a spring, the right side of the movable plug (25) is fixedly connected to one end of the push rod (26), the other end of the push rod (26) extends into the interior of the power box (5) and is fixedly connected to one end of the movable plate (17), and an air supply mechanism for intermittently supplying air to the interior of the L-shaped tube (4) is provided inside the sampling tray (1).

6. The air pollution detection and sampling system according to claim 3, characterized in that: Rollers are movably provided on the outer edge of the arc-shaped sealing plate (38), and the rollers are arranged in an equidistant ring shape at the edge of the disc-shaped gas mixing chamber (35), and the central axis of the rollers is perpendicular to the bottom of the disc-shaped gas mixing chamber (35).

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