Atmospheric pollution detection particulate matter collecting device

Abstract

The utility model discloses an atmospheric pollution detection particulate matter collecting device which comprises a box body, a collecting pipe is installed at the upper end of the box body, a collecting cover is installed at the upper end of the collecting pipe, and a detection cavity is formed below an inner cavity of the box body; the movable mounting frame is arranged above the inner cavity of the box body, at least four filter materials are mounted in the movable mounting frame, the filter materials are connected with the movable mounting frame in a clamping manner, grooves are formed in the middle positions of the two sides of the movable mounting frame, eccentric wheels are mounted in the grooves, and the eccentric wheels are connected with the movable mounting frame in a clamping manner. A second motor is mounted in the middle of one side of the box body, and an output shaft of the second motor is fixed to an eccentric wheel; the adsorption covers are arranged behind the cavity above the filter material, the adsorption covers are connected through an adsorption pipe, a dust removal fan is installed at the lower end of the outer portion of the adsorption pipe, and the problem that particles are attached to the inner filter material and difficult to clean along with long-time use of the collecting device is solved.

Description

Technical Field

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

[0002] Air pollution detection particle collection devices are usually composed of sampling heads, filtration systems, collectors, and auxiliary equipment. The sampling heads are responsible for capturing particles in the air, the filtration systems are used to remove unwanted gas components, and the collectors are used to store and preserve particle samples. They can be used not only for particle monitoring at environmental monitoring sites, but also for industrial emission control, traffic pollution research, and air quality improvement projects.

[0003] For example, the Chinese authorized patent "An Atmospheric Particle Sampler" with announcement number CN214096810U includes a box body, two collecting boxes are installed on the top of the box body, a mounting frame is inserted into the inside of the collecting box, a filter membrane is installed inside the mounting frame, a pull rod is fixedly connected to the top of the mounting frame, and the top of the pull rod extends to the outside of the collection box. A fan casing is installed on one side of the box body. When it is necessary to collect and sample particulate matter, the pull rod is pushed down, and the pull rod moves downward to push the mounting frame and the filter membrane to the inside of the box. After the filter membrane is placed in the box, the particulate matter in the airflow passing through the box is collected and sampled.

[0004] Although the above-mentioned existing technology can monitor particulate matter in the air, with long-term use, the particulate matter will adhere to the internal filter material, which on the one hand may easily cause errors in subsequent detection, and on the other hand is more troublesome to clean up. Therefore, it does not meet the existing needs. In this regard, we propose an atmospheric pollution detection particulate matter collection device. Utility Model Content

[0005] The utility model aims to provide an atmospheric pollution detection particle collection device to solve the problem in the background art that particles adhere to the internal filter material and are difficult to clean after the collection device is used for a long time.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an atmospheric pollution detection particle collection device, comprising a box body, a collection pipe is installed at the upper end of the box body, a collection cover is installed at the upper end of the collection pipe, and a detection cavity is arranged below the inner cavity of the box body; and further comprising:

[0007] A movable mounting frame is arranged above the inner cavity of the box body, a filter material is installed inside the movable mounting frame, at least four filter materials are arranged, and the filter material is clamped with the movable mounting frame, a groove is arranged at the middle position of both sides of the movable mounting frame, an eccentric wheel is installed inside the groove, a second motor is installed at the middle position of one side of the box body, and the output shaft of the second motor is fixed to the eccentric wheel;

[0008] The adsorption hood is arranged at the rear of the cavity above the filter material, and the adsorption hood is fixed to the box body. The adsorption hoods are connected by adsorption tubes, and a dust removal fan is installed at the lower end of the outer part of the adsorption tube.

[0009] Preferably, mounting blocks are provided at the upper and lower ends of both sides of the movable mounting frame, and the mounting blocks extend into the mounting cavities of the inner wall of the box body, and support springs are installed between the mounting blocks and the mounting cavities of the inner wall of the box body.

[0010] Preferably, a driven gear is fixedly provided at the lower end of the outside of the collecting tube, a first motor is installed on one side of the upper end surface of the box body, a driving gear is installed on the output shaft of the first motor, and the driving gear is meshingly connected with the driven gear.

[0011] Preferably, support legs are fixedly installed at the lower ends of the four sides of the box body, a rotating wheel is rotatably installed on the upper ends of the support legs, a telescopic column is installed inside the support legs, and the telescopic column and the support legs are slidably limited, a universal wheel is installed at the bottom of the telescopic column, a tooth groove is provided on one side of the telescopic column, a transmission gear meshing with the tooth groove is installed on one side of the tooth groove, and the transmission gear is rotatably connected to the support leg, a worm wheel is fixedly provided on the shaft at one end of the transmission gear, a worm screw matched with the worm screw is installed on one side of the worm wheel, and the upper end of the worm screw is fixed to the rotating wheel.

[0012] Preferably, a detection tube is provided inside the detection cavity, and one end of the detection tube is connected to the upper end of the inner cavity of the box, an exhaust pipe is provided at the other end of the detection tube, and the exhaust pipe extends to the outside of the box, a flow meter is installed outside the detection tube, and a sampling pump is installed on one side of the flow meter.

[0013] Preferably, the two eccentric wheels are fixed via a connecting shaft.

[0014] Preferably, solenoid valves are installed at positions of the adsorption tubes corresponding to the adsorption covers.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model is provided with a self-cleaning mechanism inside the box body. Whenever the collecting device is used up, the second motor is turned on, and its output shaft drives the eccentric wheel to rotate at high speed. When one end of the eccentric wheel rotates to the upper side, it will come into contact with the upper side of the groove, driving the movable mounting frame to move upward, and when it rotates to the lower side, it will come into contact with the lower side of the groove, driving the movable mounting frame to move downward. In this cycle, in conjunction with the supporting spring, high-frequency vibration of the movable mounting frame is formed. During the vibration, particulate matter and impurities inside the filter material can be shaken out to form dust. At this time, the dust removal fan is turned on, and under the action of negative pressure, the dust above the filter material is sent from the adsorption cover to the adsorption tube, and then discharged from the outside of the box by the adsorption tube, so as to clean the filter material. The self-cleaning mechanism can ensure that the internal filter material remains clean after each use, thereby providing a guarantee for the accuracy of subsequent collection and detection.

[0017] 2. The utility model is provided with a convenient moving mechanism. Under normal circumstances, the support legs are used to support the box, thereby improving the stability of the collection work. When the box needs to be moved, the worm is driven to rotate by rotating the rotary wheel, and the worm wheel is driven to rotate due to the friction between the external thread of the worm and the external thread of the worm wheel, thereby driving the transmission gear to rotate, and the transmission gear and the tooth groove drive the telescopic column to extend downward under the meshing action, so that the universal wheel extends from the inside of the support leg, replacing the support leg to form contact with the ground. At this time, the staff can move the box conveniently, which effectively improves the flexibility of use of the collection device.

[0018] 3. The utility model adopts a rotational drive for the collection tube. In the collection condition, by turning on the first motor, its output shaft drives the driving gear to rotate, and drives the collection tube to rotate slowly under the meshing with the driven gear, and then drives the collection cover to perform orbital motion. Air is adsorbed during the revolution, thereby avoiding the problem of too concentrated distribution of samples and further improving the accuracy of air detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the support leg and the telescopic column of the utility model;

[0022] Figure 4 For the utility model Figure 2 A partial enlarged view of the middle A area;

[0023] Figure 5 It is a schematic diagram of the internal structure of the groove of the utility model.

[0024] In the figure: 1. box body; 2. collecting tube; 3. collecting cover; 4. first motor; 5. adsorption cover; 6. adsorption tube; 7. dust removal fan; 8. second motor; 9. exhaust pipe; 10. supporting leg; 11. rotary wheel; 12. universal wheel; 13. movable mounting frame; 14. filter material; 15. mounting block; 16. supporting spring; 17. groove; 18. eccentric wheel; 19. connecting shaft; 20. driven gear; 21. driving gear; 22. detection chamber; 23. detection tube; 24. flow meter; 25. sampling pump; 26. telescopic column; 27. worm wheel; 28. worm; 29. ​​transmission gear; 30. tooth groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-5 The utility model provides an embodiment: an atmospheric pollution detection particle collection device, comprising a box body 1, a collection pipe 2 is installed at the upper end of the box body 1, a collection cover 3 is installed at the upper end of the collection pipe 2, and a detection cavity 22 is arranged below the inner cavity of the box body 1; and further comprising:

[0027] A movable mounting frame 13 is arranged above the inner cavity of the housing 1, a filter material 14 is installed inside the movable mounting frame 13, at least four filter materials 14 are arranged, and the filter materials 14 are clamped with the movable mounting frame 13, a groove 17 is arranged at the middle position of both sides of the movable mounting frame 13, an eccentric wheel 18 is installed inside the groove 17, a second motor 8 is installed at the middle position of one side of the housing 1, and the output shaft of the second motor 8 is fixed to the eccentric wheel 18;

[0028] The adsorption hood 5 is arranged at the rear of the cavity above the filter material 14 , and the adsorption hood 5 is fixed to the box body 1 , and the adsorption hoods 5 are connected through adsorption tubes 6 , and a dust removal fan 7 is installed at the lower end of the outer part of the adsorption tubes 6 .

[0029] When in use, every time the collecting device is used up, the second motor 8 is turned on, and its output shaft drives the eccentric wheel 18 to rotate at high speed. When the eccentric end rotates to the upper side, it will come into contact with the upper side of the groove 17, driving the movable mounting frame 13 to move upward, and when it rotates to the lower side, it will come into contact with the lower side of the groove 17, driving the movable mounting frame 13 to move downward, and this cycle is carried out. In conjunction with the support spring 16, high-frequency vibration of the movable mounting frame 13 is formed. During the vibration process, particulate impurities inside the filter material 14 can be shaken out to form dust. At this time, the dust removal fan 7 is turned on, and under the action of negative pressure, the dust above the filter material 14 is sent from the adsorption hood 5 to the adsorption tube 6, and then discharged from the outside of the box by the adsorption tube 6, thereby cleaning the filter material 14.

[0030] See also Figure 2 Mounting blocks 15 are provided at the upper and lower ends of both sides of the movable mounting frame 13, and the mounting blocks 15 extend into the mounting cavity of the inner wall of the box body 1, and support springs 16 are installed between the mounting blocks 15 and the mounting cavity of the inner wall of the box body 1. The support springs 16 can keep the mounting blocks 15 in the middle position of the mounting cavity of the inner wall of the box body 1, providing a prerequisite for the upward and downward movement of the movable mounting frame 13.

[0031] See also Figure 2 A driven gear 20 is fixedly provided at the lower end of the outside of the collection tube 2, and a first motor 4 is installed on one side of the upper end surface of the box body 1. A driving gear 21 is installed on the output shaft of the first motor 4, and the driving gear 21 is meshed and connected with the driven gear 20 to avoid the problem of excessive concentration of sample distribution and further improve the accuracy of air detection.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The lower ends of the four sides of the box body 1 are fixedly installed with support legs 10, and the upper ends of the support legs 10 are rotatably installed with a rotating wheel 11. A telescopic column 26 is installed inside the support leg 10, and the telescopic column 26 and the support leg 10 are slidably limited. A universal wheel 12 is installed at the bottom of the telescopic column 26, and a tooth groove 30 is provided on one side of the telescopic column 26. A transmission gear 29 meshing with the tooth groove 30 is installed on one side of the tooth groove 30, and the transmission gear 29 is rotatably connected with the support leg 10. A worm wheel 27 is fixedly provided on the shaft at one end of the transmission gear 29, and a worm 28 matched with the worm wheel 27 is installed on one side of the worm wheel 27, and the upper end of the worm 28 is fixed to the rotating wheel 11. The staff can move the box body 1 conveniently, which effectively improves the use flexibility of the collection device.

[0033] See also Figure 2 A detection tube 23 is arranged inside the detection chamber 22, and one end of the detection tube 23 is connected to the upper end of the inner cavity of the box 1, and an exhaust pipe 9 is arranged at the other end of the detection tube 23, and the exhaust pipe 9 extends to the outside of the box 1. A flow meter 24 is installed outside the detection tube 23, and a sampling pump 25 is installed on one side of the flow meter 24. Under the action of the sampling pump 25, air passes through the box 1 from top to bottom. When the air passes through the filter material 14, the particles are captured, and the flow meter 24 measures the air flow passing through. The microprocessor calculates the concentration of the particles according to the flow rate and sampling time.

[0034] See also Figure 2 The two eccentric wheels 18 are fixed via a connecting shaft 19 .

[0035] Furthermore, solenoid valves are installed at positions of the adsorption tubes 6 corresponding to the adsorption covers 5 to ensure the sealing of the inner cavity of the box body 1 during the collection process.

[0036] Working principle: when the box 1 is moved, the worm 28 is driven to rotate by rotating the rotary wheel 11, and the worm wheel 27 is driven to rotate due to the friction between the external threads of the worm 28 and the external threads of the worm wheel 27, thereby driving the transmission gear 29 to rotate, and the telescopic column 26 is driven to extend downward under the meshing action of the transmission gear 29 and the tooth groove 30, so that the universal wheel 12 extends from the inside of the support leg 10, replacing the support leg 10 to form contact with the ground. In the collection condition, by turning on the first motor 4, its output shaft drives the driving gear 21 to rotate, and drives the collection tube 2 to rotate slowly under the meshing with the driven gear 20, thereby driving the collection cover 3 to perform orbital motion, and air is adsorbed during the revolution, thereby avoiding the problem of excessive concentration of sample distribution.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A particle collection device for air pollution detection, comprising a housing (1), a collection tube (2) being mounted on the upper end of the housing (1), a collection cover (3) being mounted on the upper end of the collection tube (2), and a detection cavity (22) being arranged below the inner cavity of the housing (1); Features: Also includes: A movable mounting frame (13) is arranged above the inner cavity of the housing (1), a filter material (14) is installed inside the movable mounting frame (13), at least four filter materials (14) are provided, and the filter material (14) is snap-connected with the movable mounting frame (13), grooves (17) are provided at the middle positions of both sides of the movable mounting frame (13), an eccentric wheel (18) is installed inside the groove (17), a second motor (8) is installed at the middle position of one side of the housing (1), and the output shaft of the second motor (8) is fixed to the eccentric wheel (18); An adsorption hood (5) is arranged at the rear of the cavity above the filter material (14), and the adsorption hood (5) is fixed to the box body (1). The adsorption hoods (5) are connected via an adsorption tube (6), and a dust removal fan (7) is installed at the lower end of the outside of the adsorption tube (6).

2. The device for collecting particulate matter for air pollution detection according to claim 1, characterized in that: The upper and lower ends of both sides of the movable mounting frame (13) are provided with mounting blocks (15), and the mounting blocks (15) extend into the mounting cavity of the inner wall of the box body (1), and support springs (16) are installed between the mounting blocks (15) and the mounting cavity of the inner wall of the box body (1).

3. The device for collecting particulate matter for air pollution detection according to claim 1, characterized in that: A driven gear (20) is fixedly disposed at the lower end of the outside of the collecting pipe (2), a first motor (4) is mounted on one side of the upper end surface of the housing (1), a driving gear (21) is mounted on the output shaft of the first motor (4), and the driving gear (21) is meshedly connected with the driven gear (20).

4. The device for collecting particulate matter for air pollution detection according to claim 1, characterized in that: The lower ends of the four sides of the box body (1) are fixedly mounted with support legs (10), the upper ends of the support legs (10) are rotatably mounted with a rotating wheel (11), a telescopic column (26) is mounted inside the support leg (10), and the telescopic column (26) and the support leg (10) are slidably limited, a universal wheel (12) is mounted at the bottom of the telescopic column (26), a tooth groove (30) is arranged on one side of the telescopic column (26), a transmission gear (29) meshing with the tooth groove (30) is mounted on one side of the tooth groove (30), and the transmission gear (29) is rotatably connected with the support leg (10), a worm wheel (27) is fixedly mounted on the shaft at one end of the transmission gear (29), a worm (28) matched with the worm wheel (27) is mounted on one side of the worm wheel (27), and the upper end of the worm (28) is fixed to the rotating wheel (11).

5. The device for collecting particulate matter for air pollution detection according to claim 1, characterized in that: A detection tube (23) is arranged inside the detection cavity (22), and one end of the detection tube (23) is connected to the upper end of the inner cavity of the box (1); an exhaust pipe (9) is arranged at the other end of the detection tube (23), and the exhaust pipe (9) extends to the outside of the box (1); a flow meter (24) is installed outside the detection tube (23), and a sampling pump (25) is installed on one side of the flow meter (24).

6. The device for collecting particulate matter for air pollution detection according to claim 1, characterized in that: The two eccentric wheels (18) are fixed to each other via a connecting shaft (19).

7. The device for collecting particulate matter for air pollution detection according to claim 1, characterized in that: A solenoid valve is installed at the position of the adsorption tube (6) corresponding to the adsorption cover (5).

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