Rapid measuring device for concentration of atmospheric particulates

Abstract

The utility model belongs to the technical field of air detection, and discloses an atmospheric particulate concentration rapid determination device which comprises a detection box, a detection mechanism and a filter paper mechanism are arranged in the detection box, a sampling mechanism is arranged at the top of the detection box, and a protective cover covers the top of the detection box. Inserting blocks are symmetrically arranged at the two ends of the bottom of the protection cover, limiting seats are symmetrically arranged at the end, close to the protection cover, of the detection box, and inserting grooves corresponding to the inserting blocks are formed in the middle positions in the limiting seats; the storage cavity for placing the absorbent cotton layer is arranged in the sampling pipe, and the storage cavity is communicated with the interior of the sampling pipe through the through hole, so that the absorbent cotton layer is placed in the storage cavity and can absorb moisture in air entering the sampling pipe, and meanwhile, one end of the storage cavity is in an opening state; therefore, the saturated absorbent cotton layer can be replaced to ensure that water in air is continuously absorbed.

Description

Technical Field

[0001] The utility model belongs to the technical field of air detection, and in particular relates to a device for quickly measuring the concentration of atmospheric particulate matter. Background Art

[0002] The device for measuring the concentration of atmospheric particulate matter based on the beta-ray method uses the principle of beta-ray attenuation. Ambient air is sucked into the sampling tube by a sampling pump and discharged after passing through the filter membrane. The particulate matter is deposited on the filter membrane. When the beta rays pass through the filter membrane where the particulate matter is deposited, the energy of the beta rays decays. The concentration of the particulate matter can be calculated by measuring the attenuation amount.

[0003] A Chinese patent with application number CN202110059866.X mentions a device for detecting atmospheric particulate matter concentration and a detection method thereof. The detection device is provided with a water-absorbing layer in the sampling tube to absorb moisture in the air to prevent water vapor from affecting the detection accuracy. However, the water-absorbing layer provided in the sampling tube of the above-mentioned detection device cannot be replaced, thereby failing to ensure the continuous water absorption of the water-absorbing layer. Once the water-absorbing layer reaches saturation, it will no longer have water absorption properties and will not be able to continuously absorb moisture from the air. Secondly, the above-mentioned detection devices are mostly placed outdoors for use, and their sampling tubes and particle cutters are exposed to the outside. When not in use, dust in the air will fall on the surface of the particle cutter for a long time, which may easily cause the filter of the particle cutter to be clogged, affecting the air intake effect and detection accuracy during subsequent use. Utility Model Content

[0004] The purpose of the present utility model is to provide a device for quickly measuring the concentration of atmospheric particulate matter, so as to solve the problems raised in the above-mentioned background technology that the water absorption layer cannot be replaced and cannot continuously absorb water, and dust easily clogs the filter of the exposed particulate matter cutter, thereby affecting the air intake effect and detection accuracy during use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for rapid determination of atmospheric particulate matter concentration, comprising a detection box, a detection mechanism and a filter paper mechanism provided inside the detection box, and a sampling mechanism provided on the top of the detection box, a protective cover provided on the top cover of the detection box, plug blocks symmetrically provided at both ends of the bottom of the protective cover, a limit seat symmetrically provided at one end of the detection box close to the protective cover, a slot corresponding to the plug block provided at the middle position inside the limit seat, and bead grooves connected to the slots provided at both sides of the limit seat close to the slot, a spring connected to the inside of the bead groove, and a limit bead connected to the other end of the spring.

[0006] Preferably, the sampling mechanism includes a particle cutter, a sampling tube, a lifting connecting tube and a sampling pump. The particle cutter is connected to the sampling tube, and the end of the sampling tube away from the particle cutter is inserted into the detection box. The sampling pump is connected to one end of the lifting connecting tube, and the other end of the lifting connecting tube is arranged opposite to the bottom of the sampling tube, and a lifting cylinder is fixed to the bottom of the lifting connecting tube. A first flow meter is provided in the sampling tube, and a second flow meter is provided in the lifting connecting tube. The first flow meter and the second flow meter are both connected to the controller.

[0007] Preferably, a storage cavity is provided inside the sampling tube, and a water-absorbing cotton layer is provided inside the storage cavity. A through hole communicating with the storage cavity is provided on the inner wall of the sampling tube.

[0008] Preferably, the detection mechanism includes a detector and a radiation source, and a detection gap is provided between the detector and the radiation source.

[0009] Preferably, the filter paper mechanism includes a paper tray, a support roller, a paper collection roller and a filter paper belt. The filter paper belt passes between the lifting connecting pipe and the sampling tube, and the filter paper belt is wound around the paper tray, the support roller and the paper collection roller once.

[0010] Preferably, the particle cutter is threadedly connected to the sampling tube, and the outer wall of the sampling tube is provided with a thread groove.

[0011] Preferably, the cross section of the insert block is an isosceles trapezoidal structure, and the insert block is located between two limiting beads.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] (1) The utility model provides a storage cavity for placing a water-absorbing cotton layer inside the sampling tube, and the storage cavity is connected to the interior of the sampling tube through a through hole, so that the water-absorbing cotton layer placed in the storage cavity can absorb moisture in the air entering the sampling tube. At the same time, one end of the storage cavity is in an open state, so that the saturated water-absorbing cotton layer can be replaced to ensure continuous absorption of moisture in the air, thereby preventing water vapor from affecting the detection accuracy.

[0014] (2) The utility model provides a protective cover on the top of the detection box. The protective cover is provided on the detection box to protect the particle cutter and the sampling tube, preventing dust in the air from falling on the surface of the particle cutter and causing the filter of the particle cutter to be blocked, thereby ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a top view of the sampling tube of the utility model;

[0019] Figure 5 This is a cross-sectional view of the sampling tube of the present invention;

[0020] In the figure: 1. Detection box; 2. Protective cover; 3. Insert; 4. Limit seat; 5. Slot; 6. Bead groove; 7. Spring; 8. Limit bead; 9. Particle cutter; 10. Sampling tube; 11. Lifting connecting tube; 12. Sampling pump; 13. Storage chamber; 14. Absorbent cotton layer; 15. Detector; 16. Radioactive source; 17. Paper tray; 18. Support roller; 19. Paper collection roller; 20. Filter paper belt. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-Figure 5 As shown, the utility model provides a technical solution: a rapid determination device for atmospheric particulate matter concentration, comprising a detection box 1, a detection mechanism and a filter paper mechanism are provided inside the detection box 1, and a sampling mechanism is provided on the top of the detection box 1, a protective cover 2 is provided on the top cover of the detection box 1, plug blocks 3 are symmetrically provided at both ends of the bottom of the protective cover 2, a limit seat 4 is symmetrically provided at one end of the detection box 1 close to the protective cover 2, a slot 5 corresponding to the plug block 3 is provided at the middle position inside the limit seat 4, and bead grooves 6 connected to the slot 5 are provided at both sides of the limit seat 4 close to the slot 5, a spring 7 is connected to the inside of the bead groove 6, and a limit bead 8 is connected to the other end of the spring 7;

[0023] The cross section of the insert block 3 is an isosceles trapezoidal structure, and the insert block 3 is located between the two limiting beads 8 .

[0024] When the cam 3 is in the open position, the two stoppers 8 are pressed against the top of the cam 3 and the stoppers 8 are pressed against the bottom of the cam 3. When the cam 3 is in the open position, the two stoppers 8 are pressed against the top of the cam 3 and the stoppers 8 are pressed against the bottom of the cam 3. When the cam 3 is in the open position, the two stoppers 8 are pressed against the top of the cam 3 and the stoppers 8 are pressed against the bottom of the cam 3. When the cam 3 is in the open position, the two stoppers 8 are pressed against the top of the cam 3 and the stoppers 8 are pressed against the bottom of the cam 3.

[0025] like Figure 2 、 4 5, the sampling mechanism includes a particle cutter 9, a sampling tube 10, a lifting connecting tube 11 and a sampling pump 12. The particle cutter 9 is connected to the sampling tube 10, and the end of the sampling tube 10 away from the particle cutter 9 is inserted into the detection box 1. The sampling pump 12 is connected to one end of the lifting connecting tube 11, and the other end of the lifting connecting tube 11 is arranged opposite to the bottom of the sampling tube 10, and a lifting cylinder is fixed to the bottom of the lifting connecting tube 11. A first flow meter is provided in the sampling tube 10, and a second flow meter is provided in the lifting connecting tube 11. The first flow meter and the second flow meter are both connected to the controller;

[0026] Furthermore, a storage cavity 13 is provided inside the sampling tube 10, and a water-absorbing cotton layer 14 is provided inside the storage cavity 13. A through hole communicating with the storage cavity 13 is provided on the inner wall of the sampling tube 10;

[0027] Furthermore, the particle cutter 9 is threadedly connected to the sampling tube 10 , and a thread groove is provided on the outer wall of the sampling tube 10 .

[0028] In the above technical solution, the moisture in the air entering the sampling tube 10 is absorbed by placing the absorbent cotton layer 14 into the storage cavity 13, thereby preventing water vapor from affecting the detection accuracy. When the absorbent cotton layer 14 is saturated, the particle cutter 9 is rotated and removed, and the saturated absorbent cotton layer 14 can be taken out of the storage cavity 13 and replaced with a new absorbent cotton layer 14, thereby ensuring that the moisture in the air is continuously absorbed.

[0029] like Figure 2 As shown, the detection mechanism includes a detector 15 and a radiation source 16, and a detection gap is provided between the detector 15 and the radiation source 16;

[0030] The filter paper mechanism includes a paper placing tray 17, a support roller 18, a paper receiving roller 19 and a filter paper belt 20. The filter paper belt 20 passes between the lifting connecting pipe 11 and the sampling tube 10. The filter paper belt 20 is wound around the paper placing tray 17, the support roller 18 and the paper receiving roller 19 once.

[0031] The unused filter paper is moved to the bottom of the sampling tube 10 through the filter paper mechanism, the lifting cylinder is started to drive the lifting connecting tube 11 to rise and contact the sampling tube 10, and the sampling pump 12 is started. The flow rate is detected by the first flow meter and the second flow meter, and then the filter paper is moved to the bottom of the detector 15 through the filter paper mechanism for detection, and the detection result is sent to the controller to calculate the concentration.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid determination device for atmospheric particulate matter concentration, comprising a detection box (1), wherein a detection mechanism and a filter paper mechanism are provided inside the detection box (1), and a sampling mechanism is provided on the top of the detection box (1), a top cover of the detection box (1) is provided with a protective cover (2), and plug blocks (3) are symmetrically provided at both ends of the bottom of the protective cover (2), a limit seat (4) is symmetrically provided at one end of the detection box (1) close to the protective cover (2), a slot (5) corresponding to the plug block (3) is provided at the middle position inside the limit seat (4), and bead grooves (6) connected to the slot (5) are provided at both sides of the limit seat (4), the bead groove (6) is connected to the inside of the spring (7), and the other end of the spring (7) is connected to the limit bead (8).

2. The device for rapidly measuring atmospheric particulate matter concentration according to claim 1, characterized in that: The sampling mechanism comprises a particle cutter (9), a sampling tube (10), a lifting connecting tube (11) and a sampling pump (12); the particle cutter (9) is connected to the sampling tube (10), and one end of the sampling tube (10) away from the particle cutter (9) is inserted into the detection box (1); the sampling pump (12) is connected to one end of the lifting connecting tube (11), and the other end of the lifting connecting tube (11) is arranged opposite to the bottom of the sampling tube (10); and a lifting cylinder is fixed to the bottom of the lifting connecting tube (11); a first flow meter is provided in the sampling tube (10), and a second flow meter is provided in the lifting connecting tube (11); and both the first flow meter and the second flow meter are connected to a controller.

3. The device for rapidly measuring atmospheric particulate matter concentration according to claim 2, characterized in that: A storage cavity (13) is provided inside the sampling tube (10), and a water-absorbing cotton layer (14) is provided inside the storage cavity (13). A through hole communicating with the storage cavity (13) is provided on the inner wall of the sampling tube (10).

4. The device for rapidly measuring atmospheric particulate matter concentration according to claim 1, characterized in that: The detection mechanism comprises a detector (15) and a radiation source (16), and a detection gap is provided between the detector (15) and the radiation source (16).

5. The device for rapidly measuring atmospheric particulate matter concentration according to claim 2, characterized in that: The filter paper mechanism comprises a paper placing tray (17), a supporting roller (18), a paper receiving roller (19) and a filter paper belt (20). The filter paper belt (20) passes between the lifting connecting pipe (11) and the sampling tube (10). The filter paper belt (20) is wound around the paper placing tray (17), the supporting roller (18) and the paper receiving roller (19) once.

6. The device for rapidly measuring atmospheric particulate matter concentration according to claim 2, characterized in that: The particle cutter (9) is threadedly connected to the sampling tube (10), and the outer wall of the sampling tube (10) is provided with a thread groove.

7. The device for rapidly measuring atmospheric particulate matter concentration according to claim 1, characterized in that: The cross section of the insert block (3) is an isosceles trapezoidal structure, and the insert block (3) is located between two limiting beads (8).

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