Air pollution particulate matter collecting device

Abstract

The utility model discloses an air pollution particulate matter collecting device which comprises a sampling box, a first through hole and a second through hole are formed in the bottom of the sampling box, and the first through hole is connected with an air inlet pipe; a cylinder is arranged at the top of the sampling box, the output end of the cylinder extends into the sampling box and is connected with a piston, and a first touch switch and a second touch switch are respectively arranged on the upper end surface and the lower end surface of the piston; a sealing plate is rotatably arranged at the inner bottom of the sampling box, a third through hole is formed in the sealing plate, the third through hole corresponds to the first through hole in position and has the same diameter as the first through hole, a motor is arranged at the bottom of the sampling box, and the output end of the motor extends into the sampling box to be connected with the sealing plate; a filtering mechanism is arranged at the bottom of the sampling box and is communicated with the sampling box through a second through hole. According to the utility model, the air cylinder drives the piston to suck air into the sampling box, and then the air in the sampling box is pushed into the filtering mechanism at a constant speed, so that the problem that particles are not completely adsorbed by the filter screen and are discharged during filtering due to too high air flow speed is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas sampling equipment, and in particular relates to an air pollution particle collection device. Background Art

[0002] Particulate matter, also known as aerosols, is a type of atmospheric pollutant with two sources: natural and anthropogenic. Natural sources include dust from the ground (blown by strong winds or other natural processes); ash from volcanic eruptions, earthquakes, and forest fires; spray and sea salt from ocean waves; meteorite dust from cosmic sources; and biological particles such as pollen and spores. Anthropogenic sources primarily arise from production, construction, and transportation processes, as well as fuel combustion. These include solid particles emitted from various industrial processes, commonly known as dust; solid particulate matter generated from fuel combustion, such as soot and fly ash; particulate matter formed by the condensation of lead halides from automobile exhaust; and secondary particulate matter such as sulfate particles, which are formed when anthropogenically emitted SO2 is converted under certain conditions. Particles with a diameter of less than 10 microns are called inhalable particulate matter (PM10), particles with a diameter of less than 2.5 microns are called fine particles (PM2.5), and particles with a diameter of less than 100 microns are called TSP, or total suspended particulate matter.

[0003] Particulate matter pollution is one of the important environmental problems currently facing the world. It is necessary to establish a complete environmental monitoring network to monitor atmospheric particulate matter pollution in real time. Therefore, it is necessary to collect atmospheric fine particulate matter for a certain period of time and process and analyze it. The collection method usually adopted is active collection, that is, using a pump to absorb and adsorb atmospheric fine particulate matter on a medium. When the existing particulate matter collection device extracts gas from the atmosphere into the particle collection net, it is easy to be discharged due to excessive air pressure before it can be adsorbed by the collection net. In the process of discharge, some particles will also escape, resulting in reduced collection efficiency and ultimately affecting the test results. In addition, the existing collection device often has only one layer of filter net, which cannot adsorb particles of different diameters in layers, and the adsorption efficiency is low. Utility Model Content

[0004] Based on the above background, the purpose of the present invention is to provide an air pollution particle collection device.

[0005] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0006] An air pollution particle collection device includes a sampling box, a first through hole and a second through hole are formed on the bottom of the sampling box, and the first through hole is connected to an air inlet pipe;

[0007] A cylinder is provided on the top of the sampling box, the output end of the cylinder extends into the sampling box and is connected to a piston, and the upper end surface and the lower end surface of the piston are respectively provided with a first touch switch and a second touch switch;

[0008] A sealing plate is rotatably provided at the bottom of the sampling box, a third through hole is provided on the sealing plate, the third through hole corresponds to the first through hole in position and has the same diameter as the first through hole, a motor is provided at the bottom of the sampling box, and the output end of the motor extends into the sampling box and is connected to the sealing plate;

[0009] The bottom of the sampling box is provided with a filtering mechanism, which includes a filtering box, the filtering box is connected to the bottom of the sampling box, a partition plate is provided in the filtering box, a filtering tube is connected to the partition plate, and a plurality of filtering screens are provided in the filtering tube along the axial direction of the filtering tube, and the filter holes of the filtering screens have a gradually decreasing aperture from top to bottom;

[0010] The filter box is connected to the sampling box through a second through hole;

[0011] An electric control box is provided on the sampling box, and the electric control box is electrically connected to the cylinder, the motor, the first touch switch and the second touch switch.

[0012] Preferably, two mounting grooves are provided on the inner side wall of the filter tube, and the mounting grooves are symmetrically distributed with the axis of the filter tube as the center. A mounting rod is slidably engaged in the mounting groove, and the mounting rod is evenly provided with concave mounting blocks along the axial direction of the filter tube. The mounting blocks are engaged with the filter screen. After the filtration is completed, the filter tube is removed from the partition plate, the mounting rod is slid out along the mounting groove, and the filter screen stuck between the mounting blocks is removed. The particles on the filter screens with different apertures are counted by the equipment to obtain the test results.

[0013] Preferably, a gas one-way valve is provided at the lower end of the filter tube to prevent air from entering the filter tube from the bottom, interfering with the adsorption of particles on the filter paper, and affecting the final detection results.

[0014] Preferably, the first through hole and the second through hole are symmetrically distributed with the axis of the sampling box as the center and have the same diameter.

[0015] Preferably, there are a plurality of filter tubes evenly distributed on the partition plate.

[0016] Preferably, the filter tube is threadedly connected to the partition plate, and the upper end surface of the filter tube is flush with the upper end surface of the partition plate.

[0017] Preferably, the end of the mounting rod away from the sampling box is fixedly connected with a connecting ring, which makes the installation of the filter more convenient.

[0018] Preferably, a first slide groove is provided on the inner wall of the filter box, and a first slider is provided on the partition plate. The first slider is slidably connected to the first slide groove. After all sampling is completed, the partition plate is pressed to slide up along the inner wall of the filter box until it contacts the lower end surface of the sampling box. The air in the partition plate and the sampling box space can be filtered out, thereby ensuring that there is no error in the volume of filtered air.

[0019] Preferably, an annular groove is provided on the inner wall of the sampling box, and a silicone ring is provided on the side of the sealing plate, and the silicone ring is rotatably embedded in the annular groove.

[0020] The utility model has the following beneficial effects:

[0021] 1. The utility model uses a cylinder to drive a piston to suck gas into the sampling box, and then pushes the gas in the sampling box into the filter mechanism at a uniform speed to be filtered through filter screens of different apertures. This not only ensures the filtering effect, but also avoids the problem that particles are not completely adsorbed by the filter screen and discharged during filtration due to excessive air flow rate, thereby improving the accuracy of the final detection.

[0022] 2. The utility model controls the volume of the sampled air by sampling first and then filtering, and provides multiple sets of filter tubes, making it easier to calculate the number of particles per unit volume and making the collection results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0027] Figure 4 This is a schematic diagram of the split three-dimensional structure of the sealing plate and the sampling box of the utility model;

[0028] Figure 5 This is a schematic diagram of the split three-dimensional structure of the partition plate and the filter box of the utility model;

[0029] Figure 6 This is a schematic diagram of the internal structure of the filter tube of the present invention;

[0030] Figure 7 This is a schematic diagram of the split three-dimensional structure of the filter tube and the mounting rod of the utility model.

[0031] Wherein: 1. Sampling box; 11. First through hole; 12. Second through hole; 13. Cylinder; 14. Piston; 15. First touch switch; 16. Second touch switch; 17. Annular groove;

[0032] 2. Intake pipe;

[0033] 3. Sealing plate; 31. Third through hole; 32. Motor; 33. Silicone ring;

[0034] 4. Filter mechanism; 41. Filter box; 42. Partition plate; 43. Filter tube; 44. Filter screen; 45. First chute; 46. First slider; 47. Gas check valve; 48. Mounting slot; 49. Mounting rod; 410. Mounting block; 411. Connecting ring;

[0035] 5.Electrical control box. DETAILED DESCRIPTION

[0036] 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 embodiments described 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.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0039] like Figure 1-7As shown, an air pollution particle collection device includes a sampling box 1, a first through hole 11 and a second through hole 12 are opened at the bottom of the sampling box 1, and the first through hole 11 is connected to the air intake pipe 2;

[0040] A cylinder 13 is provided on the top of the sampling box 1. The output end of the cylinder 13 extends into the sampling box 1 and is connected to a piston 14. The upper and lower end surfaces of the piston 14 are respectively provided with a first touch switch 15 and a second touch switch 16.

[0041] A sealing plate 3 is rotatably provided at the bottom of the sampling box 1, and a third through hole 31 is provided on the sealing plate 3. The third through hole 31 corresponds to the first through hole 11 in position and has the same diameter. A motor 32 is provided at the bottom of the sampling box 1, and the output end of the motor 32 extends into the sampling box 1 and is connected to the sealing plate 3.

[0042] The bottom of the sampling box 1 is provided with a filtering mechanism 4, and the filtering mechanism 4 includes a filtering box 41, and the filtering box 41 is connected to the bottom of the sampling box 1. A partition plate 42 is provided in the filtering box 41, and a filtering tube 43 is connected to the partition plate 42. A plurality of filtering screens 44 are provided in the filtering tube 43 along the axial direction of the filtering tube 43, and the aperture of the filtering holes of the filtering screen 44 decreases step by step from top to bottom;

[0043] The filter box 41 is connected to the sampling box 1 through the second through hole 12;

[0044] The sampling box 1 is provided with an electric control box 5 , which is electrically connected to the cylinder 13 , the motor 32 , the first touch switch 15 and the second touch switch 16 .

[0045] After the electric control box 5 sets the speed of the cylinder 13, the cylinder 13 drives the piston 14 to move upward at a uniform speed. Because of the negative pressure, the air enters the sampling box 1 from the air inlet pipe 2, the third through hole 31 and the first through hole 11. When the sampling is completed, the piston 14 moves to the top of the sampling box 1, and the first touch switch 15 on the upper end face of the piston 14 contacts the sampling box 1. The electric control box 5 controls the motor 32 to drive the sealing plate 3 to rotate. After the third through hole 31 is aligned with the second through hole 12, the cylinder 13 pushes the piston 14 downward, and the air is pushed to the through hole 31 and the second through hole 12 at a uniform speed. The air is filtered through the filter mechanism 4 and through multiple layers of filtration in the filter tube 43, and finally the air is discharged. After the second touch switch 16 on the lower end face of the piston 14 contacts the sealing plate 3, the motor 32 drives the sealing plate 3 to rotate again to collect air. The sampling and filtration are repeated many times. By collecting the air first and then passing the air through the filter mechanism 4 at a uniform speed, the problem of imperfect filtration due to different air flow rates and inaccurate final test results is avoided. By collecting air through the sampling box 1, the volume of the sampled air can be determined, thereby determining the particulate matter content per unit air volume, making the test results more accurate.

[0046] Preferably, two mounting grooves 48 are provided on the inner wall of the filter tube 43, and the mounting grooves 48 are symmetrically distributed with the axis of the filter tube 43 as the center. A mounting rod 49 is slidably engaged in the mounting groove 48, and the mounting rod 49 is evenly provided with concave mounting blocks 410 along the axial direction of the filter tube 44. The mounting blocks 410 are engaged with the filter screen 44. After the filtration is completed, the filter tube 43 is removed from the partition plate 42, and the mounting rod 49 is slid out along the mounting groove 48, and the filter screen 44 stuck between the mounting blocks 410 is removed. The particles on the filter screens 44 with different apertures are counted by the equipment to obtain the test results.

[0047] Preferably, a gas one-way valve 47 is provided at the lower end of the filter tube 43 to prevent air from entering the filter tube from the bottom, interfering with the adsorption of particles on the filter paper, and affecting the final detection results.

[0048] Preferably, the first through hole 11 and the second through hole 12 are symmetrically distributed with the axis of the sampling box 1 as the center and have the same diameter.

[0049] Preferably, a plurality of filter tubes 43 are provided and evenly distributed on the partition plate 42 .

[0050] Preferably, the filter tube 43 is threadedly connected to the partition plate 42 , and the upper end surface of the filter tube 43 is flush with the upper end surface of the partition plate 42 .

[0051] By providing a plurality of filter tubes 43 , the same sample can be sampled and filtered multiple times simultaneously, thereby ensuring the accuracy of the test results.

[0052] Preferably, the end of the mounting rod 49 away from the sampling box 1 is fixedly connected with a connecting ring 411, which makes the installation of the filter 44 more convenient.

[0053] Preferably, a first slide groove 45 is provided on the inner wall of the filter box 41, and a first slider 46 is provided on the partition plate 42. The first slider 46 is slidably connected to the first slide groove 45. After all sampling is completed, the partition plate 42 is pressed to slide up along the inner wall of the filter box 41 until it contacts the lower end surface of the sampling box 1. The air in the space between the partition plate 42 and the sampling box 1 can be filtered out, thereby ensuring that there is no error in the volume of filtered air.

[0054] Preferably, an annular groove 17 is provided on the inner wall of the sampling box 1 , and a silicone ring 33 is provided on the side of the sealing plate 3 , and the silicone ring 33 is rotatably engaged in the annular groove 17 .

[0055] The working principle of the present invention is as follows: after placing the collecting device at the location where sampling is required, the electric control box 5 sets the operating speed of the cylinder 13, and aligns the third through hole 31 with the first through hole 11. The cylinder 13 drives the piston 14 upward at a uniform speed. Because of the negative pressure, air enters the sampling box 1 from the air inlet pipe 2, and the piston 14 moves to the top of the sampling box 1. The first touch switch 15 on the upper end face of the piston 14 contacts the sampling box 1. The electric control box 5 controls the motor 32 to drive the sealing plate 3 to rotate. After aligning the third through hole 31 with the second through hole 12, the cylinder 13 pushes the piston 14 downward, and the air is pushed into the filter mechanism 4 at a uniform speed through the third through hole 31 and the second through hole 12. The air passes through different holes in turn. The filter screen 44 has a diameter. Large particles in the air are adsorbed by the upper filter screen 44, and slightly smaller particles are adsorbed by the middle filter screen 44. In this way, particles of different sizes in the air are adsorbed into the filter screen 44 in turn and finally discharged from the gas one-way valve 47 in the filter tube 43. When the second touch switch 16 on the lower end face of the piston 14 contacts the sealing plate 3, the motor 32 drives the sealing plate 3 to rotate again to collect air. This sampling and filtering is repeated many times. After completing the specified number of times, any filter tube 43 is pushed to drive the partition plate 42 to move upward, filtering the air in the space between the partition plate 42 and the sampling box 1, thereby ensuring that there is no error in the filtered air volume and ensuring the accuracy of the final test results. After the filtration is completed, the filter tube 43 is removed from the partition plate 42, the mounting rod 49 is slid out along the mounting groove 48, and the filter screen 44 stuck between the mounting blocks 410 is removed. The particles on the filter screens 44 of different apertures are counted by the equipment to obtain the test results.

[0056] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An air pollution particle collection device, characterized in that: The sampling box comprises a first through hole and a second through hole formed on the bottom of the sampling box, wherein the first through hole is connected to an air inlet pipe; A cylinder is provided on the top of the sampling box, the output end of the cylinder extends into the sampling box and is connected to a piston, and the upper end surface and the lower end surface of the piston are respectively provided with a first touch switch and a second touch switch; A sealing plate is rotatably provided at the bottom of the sampling box, a third through hole is provided on the sealing plate, the third through hole corresponds to the first through hole in position and has the same diameter as the first through hole, a motor is provided at the bottom of the sampling box, and the output end of the motor extends into the sampling box and is connected to the sealing plate; The bottom of the sampling box is provided with a filtering mechanism, which includes a filtering box, the filtering box is connected to the bottom of the sampling box, a partition plate is provided in the filtering box, a filtering tube is connected to the partition plate, and a plurality of filtering screens are provided in the filtering tube along the axial direction of the filtering tube, and the filter holes of the filtering screens have a gradually decreasing aperture from top to bottom; The filter box is connected to the sampling box through a second through hole; An electric control box is provided on the sampling box, and the electric control box is electrically connected to the cylinder, the motor, the first touch switch and the second touch switch.

2. The air pollution particle collection device according to claim 1, characterized in that: Two mounting grooves are provided on the inner side wall of the filter tube, and the mounting grooves are symmetrically distributed with the axis of the filter tube as the center. A mounting rod is slidably engaged in the mounting groove, and the mounting rod is evenly provided with concave mounting blocks along the axial direction of the filter tube, and the mounting blocks are engaged with the filter screen.

3. The air pollution particle collection device according to claim 2, characterized in that: A gas one-way valve is provided at the lower end of the filter tube.

4. The air pollution particle collection device according to claim 1, characterized in that: The first through hole and the second through hole are symmetrically distributed with the axis of the sampling box as the center and have the same diameter.

5. The air pollution particle collection device according to claim 3, characterized in that: There are a plurality of filter tubes evenly distributed on the partition plate.

6. The air pollution particle collection device according to claim 5, characterized in that: The filter tube is threadedly connected to the partition plate, and the upper end surface of the filter tube is flush with the upper end surface of the partition plate.

7. The air pollution particle collection device according to claim 2, characterized in that: One end of the mounting rod away from the sampling box is fixedly connected with a connecting ring.

8. The air pollution particle collection device according to claim 1, characterized in that: A first sliding groove is provided on the inner side wall of the filter box, and a first sliding block is provided on the partition plate. The first sliding block is slidably connected to the first sliding groove.

9. The air pollution particle collection device according to any one of claims 1 to 8, characterized in that: An annular groove is provided on the inner wall of the sampling box, and a silicone ring is provided on the side of the sealing plate. The silicone ring is rotatably embedded in the annular groove.

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