An atmospheric aerosol fractionation sampler

Abstract

The present invention discloses an atmospheric aerosol classification sampler, which relates to the technical field of atmospheric aerosol sampling. It includes a base, a protective bracket, a slide table cylinder, a collection component, and a classification component. Among them, a driving wheel is fixed at each of the four corner positions on the lower end surface of the base for driving the device to move. A control panel is fixed on one side of the base for controlling the start and stop of the device. A protective bracket is fixed on the upper end surface of the base, and a classification component is fixed inside the protective bracket. An air inlet is fixed on the upper end surface of the classification component, and the air inlet extends out of the protective bracket. Collection components are arranged on the left and right sides of the classification component, and at least two slide table cylinders are symmetrically arranged on the front and back sides of the classification component for accelerating the precipitation speed of atmospheric aerosols. Through the cooperation of the classification component and the slide table cylinder, the present invention can accelerate the precipitation speed of atmospheric aerosols, quickly classify them, and separately recover the classified aerosols through the collection component, improving the sampling efficiency and classification accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric aerosol sampling, and specifically to an atmospheric aerosol classification sampler. Background Art

[0002] Atmospheric aerosol is a multiphase system composed of solid and / or liquid particles suspended in a gas and a gas carrier. The collection methods of atmospheric aerosol include natural sedimentation method, electrostatic deposition method, cryogenic condensation method, etc. The natural sedimentation method is generally used for classifying atmospheric aerosol.

[0003] The existing atmospheric aerosol classification samplers have low efficiency during classification sampling. Generally, the natural sedimentation method is used to make the atmospheric aerosol fall on the corresponding classification meshes and then collect them. As a result, some atmospheric aerosol will adhere to the classification meshes, thus affecting the sampling efficiency. Moreover, during collection, due to the lack of a separate collection tank, the classified aerosol is likely to be mixed, thus affecting the accuracy of classification.

[0004] In view of the above problems, the present invention provides an atmospheric aerosol classification sampler to solve the above problems. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: An atmospheric aerosol classification sampler, comprising a base, a protective bracket, a slide table cylinder, a collection component, and a classification component. Four corners of the lower end surface of the base are respectively fixed with a driving wheel for driving the device to move. One side of the base is fixed with a control panel for controlling the start and stop of the device;

[0006] The upper end surface of the base is fixed with a protective bracket. The classification component is fixed inside the protective bracket. The upper end surface of the classification component is fixed with an air inlet, and the air inlet extends out of the protective bracket. At least three sets of collection components are arranged on the left and right sides of the classification component. At least two slide table cylinders are symmetrically arranged on the front and back sides of the classification component for accelerating the precipitation speed of atmospheric aerosol.

[0007] Further, preferably, the classification component includes a classification barrel, a fan, a classification mesh, an auxiliary classification ring, and a slide table. Among them, a fan is rotatably arranged at the top end inside the classification barrel for preliminarily collecting atmospheric aerosol. At least one auxiliary classification ring is slidably arranged on the classification barrel. At least three classification meshes are arranged inside the classification barrel. And the classification mesh located in the middle position is fixed on the auxiliary classification ring;

[0008] Slides are symmetrically fixed on the outer wall of the auxiliary classification ring. The slides are fixed on the output ends of the slide table cylinders. The slide table cylinders can drive the auxiliary classification ring to slide up and down;

[0009] Further, preferably, a back-blowing fan is rotatably arranged at the inner bottom end of the classification barrel, and the back-blowing fan can prevent atmospheric aerosol from adhering to the classification net.

[0010] Further, preferably, the classification net is inclined, and the inclination angle of the classification net is 6°-20°, and the inclination directions of adjacent classification nets are opposite, and the filtration grades of the classification nets gradually increase from top to bottom.

[0011] Further, preferably, a collection component is correspondingly arranged at the lower position of each classification net, the collection component is fixedly corresponding to the outer walls of the classification barrel and the auxiliary classification ring, and the collection component is communicated with the inside of the classification barrel.

[0012] Further, preferably, a sliding wall corresponding to the auxiliary classification ring is opened on the classification barrel, limiting platforms are symmetrically arranged on both the upper and lower sides of the sliding wall, and the diameter of the limiting platform is larger than the diameter of the sliding wall;

[0013] At least two limiting grooves are circumferentially opened on the sliding wall, and the limiting grooves are located at the middle position of the sliding wall.

[0014] Further, preferably, an auxiliary classification ring is slidably arranged on the sliding wall, at least two sliding grooves are opened in the auxiliary classification ring, and a connecting block is fixed between the sliding grooves, the connecting block corresponds to the limiting groove opened on the sliding wall, and a sealing ring is arranged between the sliding groove and the sliding wall to prevent aerosol leakage;

[0015] A collection port is opened on the connecting block close to the collection component for communicating the classification barrel with the collection component.

[0016] Further, preferably, the connecting block and the limiting groove have the same width to limit the rotation of the auxiliary classification ring, and the length of the limiting groove is greater than the length of the connecting block to enable the auxiliary classification ring to slide up and down.

[0017] Further, preferably, the collection component includes a condensation chamber, a U-shaped tube, a collection fan and a collection tank. Among them, a U-shaped tube is fixed inside the condensation chamber, one end of the U-shaped tube is communicated with the inside of the classification component, the other end of the U-shaped tube is communicated with the collection fan, the collection fan is rotatably arranged on the side of the condensation chamber away from the classification component, the bottom of the condensation chamber is detachably provided with a collection tank, and the top of the collection tank is connected with the U-shaped tube through a pipeline.

[0018] Further, preferably, a refrigerant is filled inside the condensation chamber, the refrigerant completely wraps the U-shaped tube, filter screens are fixed at the ends of the U-shaped tube close to the collection fan, and the pore diameter of the filter screen is the same as the pore diameter of the classification net it is close to.

[0019] Compared with the prior art, the present invention provides an atmospheric aerosol grading sampler, which has the following beneficial effects:

[0020] In the present invention, a sliding table cylinder is arranged on the outer wall of the grading bucket. The sliding table cylinder can drive the auxiliary grading ring to slide up and down, so that the grading net slides up and down, thereby accelerating the air flow velocity inside the grading bucket, accelerating the sedimentation velocity of atmospheric aerosol, and thus improving the grading efficiency. Moreover, the upward sliding rate of the sliding table cylinder is less than the downward sliding rate, so as to accelerate the downward flow rate of atmospheric aerosol. And through the inclined grading net, the atmospheric aerosol can settle along its inclined direction, making it close to the collection component, accelerating the collection efficiency, and preventing the atmospheric aerosol from adhering to the grading net. An anti-blowing fan is also arranged at the bottom of the grading bucket. The anti-blowing fan can rotate intermittently, so that the atmospheric aerosol on the grading net is more likely to detach, improving the collection amount of aerosol. And the collection component can perform low-temperature condensation on the graded atmospheric aerosol, so that it is converted into liquid state, preventing the atmospheric aerosol from flowing out during collection. Description of the Drawings

[0021] Figure 1 It is an overall schematic diagram of an atmospheric aerosol grading sampler;

[0022] Figure 2 It is a schematic diagram of the grading component of an atmospheric aerosol grading sampler;

[0023] Figure 3 It is a schematic diagram of the grading bucket of an atmospheric aerosol grading sampler;

[0024] Figure 4 It is a schematic diagram of the auxiliary grading ring of an atmospheric aerosol grading sampler;

[0025] Figure 5 It is a schematic diagram of the collection component of an atmospheric aerosol grading sampler;

[0026] In the figure: 1, base; 2, control panel; 3, protective bracket; 4, sliding table cylinder; 5, collection component; 51, condensation chamber; 52, U-shaped tube; 53, collection fan; 54, collection tank; 55, filter screen; 6, grading component; 61, grading bucket; 611, sliding wall; 612, limiting platform; 613, limiting groove; 62, fan; 63, grading net; 64, auxiliary grading ring; 641, connecting block; 642, sliding groove; 643, collection port; 65, sliding table; 66, anti-blowing fan; 7, air inlet. Detailed Embodiments

[0027] Refer to Figure 1, the present invention provides a technical solution: an atmospheric aerosol hierarchical sampler, which includes a base 1, a protective bracket 3, a slide table cylinder 4, a collection component 5, and a classification component 6. At the four corner positions of the lower end surface of the base 1, a driving wheel is respectively fixed to drive the device to move. On one side of the base 1, a control panel 2 is fixed to control the start and stop of the device;

[0028] On the upper end surface of the base 1, a protective bracket 3 is fixed. Inside the protective bracket 3, a classification component 6 is fixed. On the upper end surface of the classification component 6, an air inlet 7 is fixed, and the air inlet 7 extends out of the protective bracket 3. On the left and right sides of the classification component 6, at least three collection components 5 are arranged. On the front and back sides of the classification component 5, at least two slide table cylinders 4 are symmetrically arranged to accelerate the precipitation speed of atmospheric aerosol.

[0029] Refer to Figures 2 - 4 , in this embodiment, the classification component 6 includes a classification barrel 61, a fan 62, a classification net 63, an auxiliary classification ring 64, and a slide table 65. Among them, at the top end inside the classification barrel 61, a fan 62 is rotatably arranged to preliminarily collect atmospheric aerosol. On the classification barrel 61, at least one auxiliary classification ring 64 is slidably arranged. Inside the classification barrel 61, at least three classification nets 63 are arranged, and among them, the classification net 63 located in the middle position is fixed on the auxiliary classification ring 64. It should be noted that the total number of the classification nets 63 is an odd number greater than or equal to three;

[0030] On the outer wall of the auxiliary classification ring 64, slide tables 65 are symmetrically fixed. The slide tables 65 are fixed on the output ends of the slide table cylinders 4. The slide table cylinders 4 can drive the auxiliary classification ring 64 to slide up and down. It should be noted that the upward sliding rate of the slide table cylinder 4 is less than the downward sliding rate, which can accelerate the downward flow rate of atmospheric aerosol, thereby improving the classification rate of atmospheric aerosol;

[0031] As a preferred embodiment, at the bottom end inside the classification barrel 61, a back-blowing fan 66 is rotatably arranged to prevent atmospheric aerosol from adhering to the classification net 63. It should be noted that the working mode of the back-blowing fan 66 is intermittent rotation, so as to back-blow the classification net 63 while not hindering the settlement of atmospheric aerosol.

[0032] As a preferred embodiment, the grading net 63 is inclined, and the inclination angle of the grading net 63 is 6° to 20°. It should be noted that when the inclination angle of the grading net 63 is 15°, the sedimentation rate is optimal, and the inclination directions of adjacent grading nets 63 are opposite, and the filtering grade of the grading net 63 gradually increases from top to bottom. That is to say, the inclined grading net 63 can make the atmospheric aerosol settle along its inclined direction, thereby improving the grading degree, and at the same time, it can also make the atmospheric aerosol move towards the collection assembly 5, improving the collection efficiency.

[0033] As a preferred embodiment, a collection assembly 5 is correspondingly arranged at the lower position of each grading net 63. The collection assembly 5 is fixedly arranged on the outer walls of the grading barrel 61 and the auxiliary grading ring 64, and the collection assembly 5 is in communication with the inside of the grading barrel 61.

[0034] As a preferred embodiment, the grading barrel 61 is provided with a sliding wall 611 corresponding to the auxiliary grading ring 64. Limiting platforms 612 are symmetrically arranged on both the upper and lower sides of the sliding wall 611, and the diameter of the limiting platform 612 is larger than the diameter of the sliding wall 611;

[0035] At least two limiting grooves 613 are circumferentially arranged on the sliding wall 611, and the limiting grooves 613 are located at the middle position of the sliding wall 611.

[0036] As a preferred embodiment, an auxiliary grading ring 64 is slidably arranged on the sliding wall 611. At least two sliding grooves 642 are arranged in the auxiliary grading ring 64, and a connecting block 641 is fixed between the sliding grooves 642. The connecting block 641 corresponds to the limiting groove 613 arranged on the sliding wall 611. A sealing ring is arranged between the sliding groove 642 and the sliding wall 611 to prevent aerosol leakage;

[0037] A collection port 643 is arranged on the connecting block 641 close to the collection assembly 5 for communicating the grading barrel 61 with the collection assembly 5.

[0038] As a preferred embodiment, the connecting block 641 has the same width as the limiting groove 613 to limit the rotation of the auxiliary grading ring 64, and the length of the limiting groove 613 is greater than the length of the connecting block 641, so that the auxiliary grading ring 64 can slide up and down. That is to say, the auxiliary grading ring 64 can only slide up and down.

[0039] Refer to Figure 5, in this embodiment, the collection assembly 5 includes a condensation chamber 51, a U-shaped tube 52, a collection fan 53, and a collection tank 54. Among them, a U-shaped tube 52 is fixed inside the condensation chamber 51. One end of the U-shaped tube 52 is connected to the inside of the classification assembly 6, and the other end of the U-shaped tube 52 is connected to the collection fan 53. The collection fan 53 is rotatably arranged on the side of the condensation chamber 51 away from the classification assembly 6. The collection tank 54 is detachably installed at the bottom of the condensation chamber 51, and the top of the collection tank 54 is connected to the U-shaped tube 52 through a pipeline.

[0040] As a preferred embodiment, the inside of the condensation chamber 51 is filled with a refrigerant, and the refrigerant completely wraps the U-shaped tube 52. A filter screen 55 is fixed at one end of the U-shaped tube 52 close to the collection fan 53, and the aperture of the filter screen 55 is the same as the aperture of the classification screen 63 it is close to. That is to say, the filter screen 55 can prevent atmospheric aerosol from entering the collection fan 53, thereby increasing the collection volume.

[0041] Specifically, first, the device is moved to the sampling area through the driving wheel. The collection time is set through the control panel 2, and the fan 62 is turned on to allow the atmospheric aerosol to enter the classification barrel 61 from the air inlet 7. The sliding table cylinder 4 drives the auxiliary classification ring 64 to slide up and down, so that the classification screen 63 fixed on the auxiliary classification ring 64 slides up and down. It should be noted that the upward sliding speed of the sliding table cylinder 4 is less than the downward sliding speed, which can accelerate the downward flow rate of the atmospheric aerosol, thereby increasing the classification rate of the atmospheric aerosol. The atmospheric aerosol blocked by the classification screen 63 flows along the classification screen 63 towards the collection assembly 5 and then enters the U-shaped tube 52 in the collection assembly 5. The refrigerant in the collection assembly 5 cools and condenses the atmospheric aerosol in the U-shaped tube 52 to convert it into a liquid state, and then enters the collection tank 54 to complete the classified sampling. During the classification process, the back-blowing fan 66 rotatably arranged at the bottom of the classification barrel 61 rotates intermittently, so that the classification screen 63 can be back-blown while not hindering the settlement of the atmospheric aerosol, further reducing the situation of the atmospheric aerosol adhering to the classification screen 63.

[0042] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An atmospheric aerosol fractional sampler, comprising a base (1), a protective bracket (3), a sliding table cylinder (4), a collection assembly (5) and a fractional assembly (6), characterized in that: At the four corners of the lower end face of the base (1), a driving wheel is respectively fixed for driving the device to move. On one side of the base (1), a control panel (2) is fixed for controlling the start and stop of the device; On the upper end face of the base (1), a protective bracket (3) is fixed. Inside the protective bracket (3), a grading component (6) is fixed. On the upper end face of the grading component (6), an air inlet (7) is fixed, and the air inlet (7) extends out of the protective bracket (3). At least three sets of collection components (5) are arranged on the left and right sides of the grading component (6). At least two slide cylinder (4) are symmetrically arranged on the front and back sides of the grading component (6) for accelerating the precipitation speed of atmospheric aerosol; The grading component (6) includes a grading barrel (61), a fan (62), a grading mesh (63), an auxiliary grading ring (64) and a slide (65). Among them, a fan (62) is rotatably arranged at the top end inside the grading barrel (61) for preliminarily collecting atmospheric aerosol. At least one auxiliary grading ring (64) is slidably arranged on the grading barrel (61). At least three grading meshes (63) are arranged inside the grading barrel (61), and among them, the grading mesh (63) located in the middle position is fixed on the auxiliary grading ring (64); Slides (65) are symmetrically fixed on the outer wall of the auxiliary grading ring (64). The slides (65) are fixed on the output end of the slide cylinder (4), and the slide cylinder (4) can drive the auxiliary grading ring (64) to slide up and down; On the grading barrel (61), a sliding wall (611) corresponding to the auxiliary grading ring (64) is opened. Limiting platforms (612) are symmetrically arranged on the upper and lower sides of the sliding wall (611), and the diameter of the limiting platform (612) is larger than the diameter of the sliding wall (611); At least two limiting grooves (613) are circumferentially opened on the sliding wall (611), and the limiting grooves (613) are located in the middle position of the sliding wall (611); An auxiliary grading ring (64) is slidably arranged on the sliding wall (611). At least two sliding grooves (642) are opened inside the auxiliary grading ring (64), and a connecting block (641) is fixed between the sliding grooves (642). The connecting block (641) corresponds to the limiting groove (613) opened on the sliding wall (611). A sealing ring is arranged between the sliding groove (642) and the sliding wall (611) to prevent aerosol leakage; A collection port (643) is opened on the connecting block (641) close to the collection component (5) for communicating the grading barrel (61) with the collection component (5).

2. The atmospheric aerosol fractionation sampler according to claim 1, wherein: An air blowing fan (66) is rotatably arranged at the bottom end inside the grading barrel (61), and the air blowing fan (66) can prevent atmospheric aerosol from adhering to the grading mesh (63).

3. The atmospheric aerosol fractionation sampler according to claim 1, characterized in that: The grading mesh (63) is inclined, and the inclination angle of the grading mesh (63) is 6° - 20°. The inclination directions of adjacent grading meshes (63) are opposite, and the filtering grade of the grading mesh (63) gradually increases from top to bottom.

4. The atmospheric aerosol fractional sampler according to claim 1, wherein: The width of the connecting block (641) is the same as that of the limiting groove (613), which restricts the rotation of the auxiliary grading ring (64). The length of the limiting groove (613) is greater than the length of the connecting block (641), enabling the auxiliary grading ring (64) to slide up and down.

5. The atmospheric aerosol fractionation sampler according to claim 1, characterized in that: A collection assembly (5) is correspondingly arranged at the lower position of each grading mesh (63). The collection assembly (5) is fixedly corresponding to the outer walls of the grading barrel (61) and the auxiliary grading ring (64), and the collection assembly (5) is internally connected to the grading barrel (61).

6. The atmospheric aerosol fractionation sampler according to claim 1, characterized in that: The collection assembly (5) includes a condensation chamber (51), a U-shaped tube (52), a collection fan (53), and a collection tank (54). Among them, the U-shaped tube (52) is fixedly arranged inside the condensation chamber (51). One end of the U-shaped tube (52) is internally connected to the grading assembly (6), and the other end of the U-shaped tube (52) is connected to the collection fan (53). The collection fan (53) is rotatably arranged on the side of the condensation chamber (51) away from the grading assembly (6). The bottom of the condensation chamber (51) is detachably installed with the collection tank (54), and the top of the collection tank (54) is connected to the U-shaped tube (52) through a pipeline.

7. An atmospheric aerosol fractionation sampler according to claim 6, characterized in that: The condensation chamber (51) is filled with a refrigerant, and the refrigerant completely wraps the U-shaped tube (52). A filter screen (55) is fixed at one end of the U-shaped tube (52) close to the collection fan (53), and the aperture of the filter screen (55) is the same as the aperture of the grading mesh (63) it is close to.

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