Air environment pollution detection sampling system

Abstract

The invention discloses an air environmental pollution detection sampling system, and relates to the field of environmental detection.The air environmental pollution detection sampling system comprises a sampling disc, a lifting rod, a base, a power box and a collecting pipe, the interior of the sampling disc is of a hollow structure, the center of the bottom of the sampling disc is fixedly connected with the top of the lifting rod, and the bottom of the lifting rod is fixedly installed on the surface of the base; exhaust pipes are fixedly arranged at the position, close to the middle, in the sampling disc, the exhaust pipes are annularly arranged in the sampling disc at equal intervals, and the two ends of each exhaust pipe are of a sealed structure. According to the invention, a plurality of groups of fixed exhaust pipes are arranged, and the plurality of groups of fixed exhaust pipes are linearly arranged at the top edge of the sampling disc at equal intervals, so that during sampling, the fixed exhaust pipes can extract air in different directions in one area, and the air enters the disc-shaped gas mixing cavity to be mixed; and finally, the mixed air enters a collecting pipe to be collected, so that accidental errors can be eliminated, and the accuracy of an experimental result is improved.

Description

Technical Field

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

[0002] Environmental monitoring refers to determining environmental quality (or pollution level) and its changing trends by measuring the representative values ​​of factors that affect environmental quality. The main means of environmental monitoring include physical means, chemical means, and biological means. Environmental monitoring is to track changes in environmental quality and determine the level of environmental quality by detecting the content and emissions of various substances that have an impact on humans and the environment, providing a basis and guarantee for environmental management, pollution control and other work.

[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, and 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 one sampling point is only the air in a small range, which is less representative; and 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 environment pollution detection sampling system, comprising a sampling tray, a lifting rod, a base, a power box and a collecting tube, 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 arranged 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 the two ends of the exhaust pipe are sealing structures, a first piston plate is slidingly arranged inside the exhaust pipe, a horizontal moving rod is fixedly arranged on the outer side surface of the first piston plate, a threaded groove is opened on the inner side surface of the first piston plate, which penetrates into the interior of the horizontal moving rod, a threaded rod is arranged inside the threaded groove, the inner side 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 with the driving motor for transmission, and the driving motor is located at the sampling tray. The top end of the outer cover is provided with a cover for the inflatable bag, and the cover has a sealing effect on the inflation tube, and the top end of the cover is provided with a cam which is provided at the bottom of the cover.

[0007] 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 to rotate, and the active bevel gear will drive the threaded rod to rotate through the meshing transmission with the passive bevel gear. The threaded rod will drive the first piston plate to move inside the exhaust pipe through the threaded connection with the thread groove. The driving motor drives the active bevel gear to rotate back and forth repeatedly in the horizontal plane, so as to control 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 air in the room will enter the exhaust pipe through the fixed exhaust pipe for storage. 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 disc-shaped mixing chamber through the air outlet at the bottom of the exhaust pipe, and then enter the external threaded tube through the air vent at the bottom of the disc-shaped mixing chamber, and finally enter 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 brought back to the laboratory for testing. In the present invention, a plurality of fixed air extraction pipes are provided, and the plurality of fixed air extraction pipes are arranged linearly and equidistantly at the top edge of the sampling plate, so that when sampling, the fixed air extraction pipes can extract air from different directions in an area, and the gas enters the inside of the disc-shaped mixing chamber for mixing, and finally the mixed air enters the inside of the collection pipe for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results; 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, so that the mixed air inside the disc-shaped mixing chamber enters the interior of the collecting tube through the external threaded tube for collection. After the collection is completed, the corresponding vent holes can be closed, and the collecting tube can be sealed.

[0008] Preferably, the elastic sealing mechanism includes a rubber plug 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 plug, and the bottom of the rubber plug is fixedly connected to the upper surface of a support plate fixedly connected to the inner wall of the collecting tube through a spring. The rubber plug is a truncated cone structure, and the top surface diameter of the rubber plug is smaller than the bottom surface diameter of the rubber plug, 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 threadedly connected to each other, the collecting port is in an open state.

[0009] 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.

[0010] 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 holes, 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 a driving mechanism for controlling the rotation of the arc-shaped sealing plate inside the disc-shaped mixing chamber is provided inside the power box.

[0011] When working, the driving mechanism will control the arc-shaped sealing plate to rotate at the bottom of the disc-shaped mixing chamber, 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 then there is always a group of vent holes at the bottom of the disc-shaped mixing chamber in an open state, and then the air inside the disc-shaped mixing chamber can pass through the vent holes into the inside of the external threaded tube, and finally enter the inside of the collecting tube to be collected, and when the inside of the collecting tube has collected all the gas, the arc-shaped sealing plate just closes the vent holes corresponding to the group of collecting tubes, and at the same time, another group of vent holes will be opened, and then the mixed gas inside the disc-shaped mixing chamber will enter the inside of another group of collecting tubes for collection; The present invention opens the vents in sequence, with only one group of vents opened each time, thereby injecting mixed air 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, and the collecting tube can be removed after the sampling is completed, thereby greatly saving sampling time and greatly improving sampling efficiency.

[0012] Preferably, an arc-shaped limiting plate is fixedly provided on the top of the arc-shaped sealing plate, and 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.

[0013] 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.

[0014] 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 a circular gear ring is fixedly provided on the edge of the rotating column, a movable plate is provided inside the power box, a mounting groove is provided on the surface of the movable plate facing the circular gear ring, a hinged plate is movably hinged inside the mounting groove through a torsion spring, the tip of the hinged plate is inclined toward the right, a stopper is fixedly provided inside the mounting groove on the right side of the hinged plate, 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, and the movable plate is pushed back and forth in the horizontal plane by a push rod mechanism.

[0015] 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 circular gear ring to rotate, and thus the position of the arc-shaped sealing plate will not change.

[0016] 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 fixing rod is fixedly provided inside the horizontal tube of the L-shaped tube, the right side of the fixing rod is fixedly connected to the movable plug through a spring, the right side surface 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 an air supply mechanism is provided inside the sampling tray for intermittently supplying air to the interior of the L-shaped tube.

[0017] 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 fixedly connected 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.

[0018] 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 disk near the outer edge, and the outer end of the horizontally movable rod passes through the outer end of the vacuum 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.

[0019] During operation, 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 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 extrusion of the second piston plate, driving the movable plate to move to the right, and driving the arc-shaped 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 exhaust 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 toward the direction close to the movable plug, thereby causing the movable plate to move to the left. At this time, the arc-shaped sealing plate will not rotate, and at the same time, the first piston plate will squeeze the air inside the exhaust pipe into the disc-shaped mixing chamber for mixing and enter the collection pipe through the vents for collection, and so on and so forth until all the collection pipes have collected the air; 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, and 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 collecting pipe through the air vent to be collected, thereby realizing the collection of air in the bottom collecting pipe in sequence, without the need to manually unscrew the collecting pipe frequently and replace it with a new collecting pipe to hold the air, thereby saving time and improving work efficiency.

[0020] 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 slidably provided inside the sliding cavity, a limiting ring is slidably provided 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.

[0021] 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 drive the movable exhaust pipe to be gradually drawn out from the inside of the fixed exhaust pipe by attracting the iron block at the end of the movable exhaust pipe, so that the movable exhaust pipe can extract air at different positions in the horizontal plane, thereby expanding the sampling area and making the extracted air more representative.

[0022] Preferably, the magnet ring is sleeved on the wave rod inside the sliding cavity, the wave rod is horizontally arranged, and the movable air extraction pipe and the limiting ring are fixedly connected by a rubber tube, the movable air extraction pipe and the limiting ring are fixedly provided with fixing rods inside, and the two sets of fixing rods are fixedly connected by springs.

[0023] 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 air extraction pipe to shake up and down in the vertical plane, thereby expanding the sampling area of ​​the movable air extraction pipe in the vertical plane, making the sample more representative.

[0024] 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 mixing chamber, and the central axis of the rollers is perpendicular to the bottom of the disc-shaped mixing chamber.

[0025] 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 arc-shaped sealing plate rotate more smoothly inside the disc-shaped mixing chamber.

[0026] Technical effects and advantages of the present invention: 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 air in the room will enter the exhaust pipe through the fixed exhaust pipe for storage. 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 disc-shaped mixing chamber through the air outlet at the bottom of the exhaust pipe, and then enter the external threaded tube through the air vent at the bottom of the disc-shaped mixing chamber, and finally enter 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 brought back to the laboratory for testing. Several groups of fixed air extraction pipes are arranged linearly at equal distances on the top edge of the sampling plate. When sampling, the fixed air extraction pipes can extract air from different directions in an area, and the gas enters the inside of the disc-shaped mixing chamber for mixing. Finally, the mixed air enters the inside of the collection tube for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results. The present invention opens the vents in sequence, with only one group of vents opened each time, thereby injecting mixed air 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, and the collecting tube can be removed after the sampling is completed, thereby greatly saving sampling time and greatly improving sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention.

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0029] Figure 3 Schematic diagram of the internal structure of the sampling tray.

[0030] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0031] Figure 5 for Figure 3 Enlarged view of point C in the middle.

[0032] Figure 6 for Figure 3 Enlarged view of point D in the middle.

[0033] Figure 7 Schematic diagram of the internal structure of the arc-shaped sealing plate in the disc-shaped mixing chamber.

[0034] Figure 8 for Figure 7 Enlarged view of point E in the middle.

[0035] Fig. 9 It is a structural schematic diagram of the movable plate.

[0036] 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 sealing plate 38, arc limit plate 39, vent 40, stopper 41, hinged plate 42, second piston plate 43, exhaust port 44, collecting port 45. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention provides Figure 1-9The air environment pollution detection sampling system shown in the figure includes a sampling tray 1, a lifting rod 2, a base 3, a power box 5 and a collection tube 6. 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 installed on the surface of the base 3. An exhaust pipe 34 is fixedly arranged 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 slidably provided with a first movable The plug plate 16, the outer side surface of the first piston plate 16 is fixedly provided with a horizontal moving rod 18, the inner side surface of the first piston plate 16 is provided with a thread groove 19 that penetrates into the interior of the horizontal moving rod 18, and the interior of the thread groove 19 is provided with a threaded rod 20, the inner side end of the threaded rod 20 extends out of the inner side 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 and transmitted with each other, and the rotating shaft of the active bevel gear 12 is connected with the driving motor, and the driving motor is located in the storage cavity inside the sampling tray 1 13, an air suction port 44 is provided at the top of the inner end of the air suction pipe 34, the upper end of the air suction port 44 extends out of the top edge of the sampling tray 1, and the air suction port 44 is connected to the bottom end of the fixed air suction pipe 7 provided on the upper surface of the sampling tray 1, and a disc-shaped mixing chamber 35 is provided in the bottom wall of the sampling tray 1, and the disc-shaped mixing chamber 35 is connected to the inside of the air suction pipe 34 through the air outlet at the bottom of the inner end of the air suction pipe 34, and the bottom edge of the disc-shaped mixing chamber 35 is evenly provided with air vents 40, and the power box 5 is fixedly connected to the sampling tray 1. The bottom of the sampling disk 1 is fixedly provided with an external threaded tube 21 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 threadedly connected with the internal threaded tube at the top of the collecting tube 6, and the top of the collecting tube 6 is provided with an elastic sealing mechanism, and the vent holes 40 are provided with a plurality of groups, and the plurality of groups of vent holes 40 are arranged in an equidistant ring 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 suction port 44 and the air outlet.

[0039] When working, 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 12 to rotate, and the active bevel gear 12 will drive the threaded rod 20 to rotate 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 air in the room is The air will enter the interior of the air extraction pipe 34 through the fixed air extraction pipe 7 for storage, and when the threaded rod 20 drives the first piston plate 16 to move toward the inner end of the air extraction pipe 34 again, the air inside the air extraction pipe 34 will enter the interior of the disc-shaped mixing chamber 35 through the air outlet at the bottom of the air extraction 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 at the top of the collection pipe 6 is threadedly connected to the external threaded pipe 21, the collection pipe 6 can be removed after sampling and brought back to the laboratory for testing. In the present invention, a plurality of fixed air extraction pipes 7 are provided, and the plurality of fixed air extraction pipes 7 are arranged linearly and equidistantly at the top edge of the sampling plate 1. When sampling, the fixed air extraction pipes 7 can extract air from different directions in an area, and the gas enters the inside of the disc-shaped mixing chamber 35 for mixing. Finally, the mixed air enters the inside of the collecting pipe 6 for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results. 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, so that the mixed air inside the disc-shaped mixing chamber 35 enters the collection tube 6 through the external threaded tube 21 for collection. After the collection is completed, the corresponding vent holes 40 can be closed, and the collection tube 6 can be sealed.

[0040] The elastic sealing mechanism includes a rubber plug 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 plug 22. The bottom of the rubber plug 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 plug 22 is a truncated cone structure, and the top surface diameter of the rubber plug 22 is smaller than the bottom surface diameter of the rubber plug 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.

[0041] 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 threadedly connected to each other. 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.

[0042] 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. A 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.

[0043] When working, the driving mechanism will control the arc-shaped sealing plate 38 to rotate at the bottom of the disc-shaped mixing chamber 35, and 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, and then there is always a group of vent holes 40 at the bottom of the disc-shaped mixing chamber 35 in an open state, and then the air inside the disc-shaped mixing chamber 35 can pass through the vent holes 40 to enter the inside of the external threaded tube 21, and finally enter the inside of the collecting tube 6 to be collected, and when the inside of the collecting tube 6 has collected all the gas, the arc-shaped sealing plate 38 will just close the vent holes 40 corresponding to the group of collecting tubes 6, and at the same time, the other group of vent holes 40 will be opened, and then the mixed gas inside the disc-shaped mixing chamber 35 will enter the inside of another group of collecting tubes 6 to be collected; The present invention opens the air holes 40 in sequence, with only one group of air holes 40 opened each time, thereby injecting mixed air 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, and there is no need to remove the collecting tube 6 for replacement during the sampling process. The collecting tube 6 can be removed after the sampling is completed, thereby greatly saving the sampling time and greatly improving the sampling efficiency.

[0044] 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.

[0045] 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.

[0046] 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 circular gear ring 27 is fixedly arranged on the edge of the rotating column 28. A movable plate 17 is arranged inside the power box 5. A mounting groove is provided on the surface of the movable plate 17 facing the circular gear ring 27. A hinge plate 42 is movably hinged inside the mounting groove through a torsion spring. The tip of the hinge plate 42 is inclined to the right. A stopper 41 is fixedly arranged inside the mounting groove on the right side of the hinge plate 42. A driving rod 37 is fixedly arranged 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 arranged 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.

[0047] During operation, 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 circular gear ring 27 to rotate, and thus the position of the arc-shaped sealing plate 38 will not change.

[0048] The push rod mechanism includes 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, and 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 surface 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.

[0049] 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 fixedly connected to it, 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.

[0050] 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.

[0051] During operation, when the first piston plate 16 moves toward the outer end of the exhaust pipe 34, the indoor air will enter the exhaust pipe 34 through the fixed exhaust pipe 7 for storage, and 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 rightward, 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 of 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, driving the movable plate 17 to move rightward, and driving the arc-shaped sealing plate 38 to rotate a certain angle to open a group of vents 40. 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, and the movable plug 25 will drive the push rod 26 to move toward the direction close to the movable plug 25, so that the movable plate 17 moves 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 disc-shaped mixing chamber 35 for mixing and enter the collection pipe 6 through the vent hole 40 for collection, and so on and so forth until all the collection pipes 6 have collected all the air; 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, and 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 for containing air, thereby saving time and improving work efficiency.

[0052] 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 slidably provided inside the sliding cavity 32, a limiting ring 29 is slidably provided 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 fixedly provided on the outer end edge of the movable exhaust pipe 9.

[0053] 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 drive the movable exhaust pipe 9 to be gradually drawn out from the inside of the fixed exhaust pipe 7 by attracting the iron block 10 at the end of the movable exhaust pipe 9, so that the movable exhaust pipe 9 can extract air at different positions in the horizontal plane, thereby expanding the sampling area and making the extracted air more representative.

[0054] 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. The movable air extraction pipe 9 and the limiting ring 29 are fixedly provided with fixing rods 24 inside, and the two sets of fixing rods 24 are fixedly connected by springs.

[0055] During operation, when the magnet ring 31 moves 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.

[0056] 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 gas mixing chamber 35 , and the central axis of the rollers is perpendicular to the bottom of the disc-shaped gas mixing chamber 35 .

[0057] When working, 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 arc-shaped sealing plate 38 rotate more smoothly inside the disc-shaped mixing chamber 35.

[0058] 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 threaded rod 20 to rotate 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 The air inside will enter the interior of the air extraction pipe 34 through the fixed air extraction pipe 7 for storage, and when the threaded rod 20 drives the first piston plate 16 to move toward the inner end of the air extraction pipe 34 again, the air inside the air extraction pipe 34 will enter the interior of the disc-shaped mixing chamber 35 through the air outlet at the bottom of the air extraction 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 brought back to the laboratory for testing. In the present invention, a plurality of fixed air extraction pipes 7 are provided, and the plurality of fixed air extraction pipes 7 are arranged linearly and equidistantly at the top edge of the sampling plate 1. When sampling, the fixed air extraction pipes 7 can extract air from different directions in an area, and the gas enters the inside of the disc-shaped mixing chamber 35 for mixing. Finally, the mixed air enters the inside of the collecting pipe 6 for collection, thereby eliminating accidental errors and improving the accuracy of the experimental results. 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, so that the mixed air inside the disc-shaped mixing chamber 35 enters the collection tube 6 through the external threaded tube 21 for collection. After the collection is completed, the corresponding vent holes 40 can be closed, and the collection tube 6 can be sealed.

[0059] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or is the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0060] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. An air pollution detection sampling system, comprising a sampling plate (1), a lifting rod (2), a base (3), a power box (5) and a collection tube (6), 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 exhaust pipe (34) is fixedly provided 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). Both ends of the exhaust pipe (34) are sealed structures. A first piston plate (16) is slidably provided inside the exhaust pipe (34). 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). A threaded rod (20) is provided inside the thread 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 and transmitted with each other, and the rotating shaft of the active bevel gear (12) is connected with the driving motor in a transmission manner. The driving motor is located in the storage chamber (13) inside the sampling plate (1).

2. The air environment pollution detection sampling system according to claim 1 is characterized in that: An air suction port (44) is provided at the top of the inner end of the air suction pipe (34), the upper end of the air suction port (44) extends out of the top edge of the sampling plate (1), and the air suction port (44) is connected to the bottom end of a fixed air suction 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), the disc-shaped air mixing chamber (35) is connected to the inside of the air suction pipe (34) through the air outlet at the bottom of the inner end of the air suction pipe (34), and air vents (40) are evenly provided at the bottom edge of the disc-shaped air mixing chamber (35), and the power box (5) is fixedly connected to the sampling plate (1). The bottom of the sampling disk (1) is fixedly provided with an external threaded tube (21) 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 threadedly connected 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 a plurality of groups, the plurality of groups of vent holes (40) are arranged in an equidistant annular pattern at the bottom of the disk-shaped mixing chamber (35), an opening and closing mechanism for controlling the opening and closing of the vent holes (40) is provided inside the disk-shaped mixing chamber (35), and a one-way valve is provided inside the air suction port (44) and the air outlet.

3. The air environment pollution detection sampling system according to claim 2 is characterized in that: The elastic sealing mechanism comprises a rubber plug (22) and a push rod (23); the push rod (23) is inserted into the interior of a 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 plug (22); the bottom of the rubber plug (22) is 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) is a truncated cone structure; the top surface diameter of the rubber plug (22) is smaller than the bottom surface diameter of the rubber plug (22); the diameter of the push rod (23) is larger than the inner tube diameter of the externally threaded tube (21); when the internally 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.

4. The air environment pollution detection sampling system according to claim 3 is 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 gas mixing chamber (35), only one group of vent holes (40) is not covered. The power box (5) is provided with a driving mechanism for controlling the arc-shaped sealing plate (38) to rotate inside the disc-shaped gas mixing chamber (35). An arc-shaped limiting plate (39) is fixedly provided on the top of the arc-shaped sealing plate (38). 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.

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

6. The air environment pollution detection sampling system according to claim 5 is 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) via a spring; the right side surface 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).

7. The air environment pollution detection sampling system according to claim 6 is characterized in that: The air supply mechanism comprises an air supply pipe (15) and a second piston plate (43); the air supply pipe (15) is fixedly connected to a position inside the sampling plate (1) near the outer edge; the outer end of the horizontal moving rod (18) passes through the outer end of the air extraction pipe (34) and extends into the interior of the second piston plate (43) to be fixedly connected to the second piston plate (43); the outer end of the air supply pipe (15) is in communication with the top end of the L-shaped tube (4).

8. The air environment pollution detection and sampling system according to claim 7 is characterized in that: A magnet (33) is provided at a position near the top edge of the second piston plate (43); a sliding cavity (32) is provided inside the top plate of the sampling plate (1); a magnet ring (31) is slidably provided inside the sliding cavity (32); a limit ring (29) is slidably 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 port of the fixed air extraction tube (7); and an iron block (10) that attracts the magnet ring (31) is fixedly provided at the outer end edge of the movable air extraction tube (9).

9. The air environment pollution detection and sampling system according to claim 8, characterized in that: The magnet ring (31) is sleeved on a wave rod (14) inside the sliding cavity (32); the wave rod (14) is arranged horizontally, and the movable air extraction pipe (9) and the limit ring (29) are fixedly connected via a rubber tube (30); fixed rods (24) are fixedly provided inside the movable air extraction pipe (9) and the limit ring (29); and the two sets of fixed rods (24) are fixedly connected via a spring.

10. The air environment pollution detection and sampling system according to claim 4, 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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