A dust aerosol generating device

Abstract

The present invention specifically relates to a dust aerosol generating device, which includes a storage device, a feeding device, a quantitative conveying device, and an aerosol generating device. The feeding device includes a feeder and a feeding driving mechanism. The feeding port of the feeder is located inside the storage device. The quantitative conveying device includes a quantitative material receiving mechanism and a material receiving driving mechanism. The feeding driving mechanism drives the feeder to feed materials to the quantitative material receiving mechanism, and the material receiving driving mechanism drives the quantitative material receiving mechanism to complete quantitative material receiving and feed materials to the aerosol generating device. The problem of dust agglomeration is solved; the aerosol generation process can proceed stably, and the stability is improved; when the concentration of the generated aerosol is low, a quantitative disk with a smaller dust carrying capacity can be used, and when a higher concentration of aerosol is generated, a quantitative belt with a larger dust carrying capacity can be used, and the position of the quantitative belt is adjustable, increasing the concentration range of aerosol generation and realizing the generation of aerosol in a wide concentration range.

Description

Technical Field

[0001] The present invention relates to the technical field of aerosol generators, and particularly to a dust aerosol generating device. Background Art

[0002] Ambient air particulate matter pollution remains one of the prominent problems of current environmental pollution and has attracted great attention from countries around the world. In order to accurately and real-time monitor the particulate matter pollution in ambient air, relevant detection technologies have also developed rapidly. Different from gaseous pollutants that can be traced back to standard gases, the value traceability of particulate matter detection equipment requires calibrating and tracing relevant detection equipment under the condition of simulating the generation of standard particulate matter aerosol with a certain concentration. This requires a reliable and stable aerosol generator to stably generate a certain amount of aerosol in real time. In addition, in the fields of chemical and chemical research and medical research, etc., it is often necessary to aerosolize fine particulate matter in powder form to facilitate the study of its relevant properties or conduct relevant scientific experiments. The concentration range of aerosol generation is usually relatively large, which poses higher requirements for aerosol generating equipment.

[0003] Currently, the methods for generating solid particulate matter aerosol mainly include wet method and dry method. The wet method means that first, solid particulate matter is evenly dispersed or dissolved in a liquid, then the liquid is atomized by spraying, and then the water is vaporized by heating and drying to form solid particulate matter aerosol. The dispersion degree of the aerosol solid particles generated by this method is relatively poor, and it is impossible to reach a high concentration. Moreover, this method is not applicable to solid particulate matter that is not suitable for dispersion in water. The dry method means that solid dust particles are quantitatively transferred to the gas phase through a specific device and dispersed with the airflow to form solid particulate matter aerosol. The aerosol formed by this method has good dispersion, but the problem is that the delivery amount of solid particulate matter is unstable, resulting in unstable concentration of particulate matter aerosol, and it is impossible to generate low-concentration aerosol. During the generation process, the particulate matter is prone to absorb moisture and agglomerate, and the aerosol stability is poor, unable to meet the use requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a dust aerosol generating device to solve the problems that in the existing dry dust aerosol generating device, the delivery amount of solid particulate matter is unstable, resulting in uneven concentration and poor stability of the formed aerosol.

[0005] The dust aerosol generating device provided by the present invention includes a storage device, a feeding device, a quantitative conveying device, and an aerosol generating device. The feeding device includes a feeder and a feeding driving mechanism. The feeding port of the feeder is located inside the storage device. The quantitative conveying device includes a quantitative material receiving mechanism and a material receiving driving mechanism. The feeding driving mechanism drives the feeder to feed materials to the quantitative material receiving mechanism, and the material receiving driving mechanism drives the quantitative material receiving mechanism to complete quantitative material receiving and convey the materials to the aerosol generating device.

[0006] Preferably, the feeder includes a dust spiral feeding assembly and a dust discharging guiding sleeve. The dust discharging guiding sleeve is sleeved outside the discharging port of the dust spiral feeding assembly. The quantitative material receiving mechanism is located below the dust discharging guiding sleeve and the aerosol generating device.

[0007] Preferably, the dust spiral feeding assembly includes a feeding rod, a spring sleeved outside the feeding rod, and a dust feeding guiding sleeve sleeved outside the spring. The top of the dust feeding guiding sleeve is provided with a discharging port.

[0008] Preferably, it further includes a main chassis. The storage device is located inside the main chassis. The feeding device, the quantitative conveying device, and the aerosol generating device are fixed on the main chassis.

[0009] Preferably, the feeding device further includes a bracket assembly. The bracket assembly is fixed on the main chassis. The feeder and the feeding driving mechanism are fixed on the bracket assembly.

[0010] Preferably, the feeding device further includes a height adjusting mechanism. The height adjusting mechanism includes an adjusting bolt and a connecting plate. The connecting plate is fixedly connected with the bracket assembly. The adjusting bolt is screwed on the main chassis.

[0011] Preferably, the quantitative material receiving mechanism adopts a quantitative disc. The material receiving driving mechanism is arranged at the bottom of the quantitative disc to drive the quantitative disc to rotate.

[0012] Preferably, the quantitative material receiving mechanism adopts a quantitative belt. The material receiving driving mechanism is connected with the quantitative belt.

[0013] Preferably, the storage device includes a storage hopper, a base, and a stirring device. The storage hopper is fixed on the base. The stirring device includes a stirring driving mechanism, a drying turntable, and stirring blades. One end of the stirring blades extends into the storage hopper, and the other end is fixed on the drying turntable. The drying turntable is arranged above the base and below the storage hopper. The stirring driving mechanism drives the drying turntable to rotate.

[0014] Preferably, it further includes a carrier gas purification device and a control system. Both the carrier gas purification device and the control system are fixed on the main chassis.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The drying turntable of the present invention heats the storage hopper to avoid agglomeration caused by dust moisture absorption; on the other hand, the spring used in the feeder can increase the friction between the dust and the inner wall of the dust feeding diversion sleeve, further solving the problem of dust agglomeration; after the dust falls on the metering belt or metering ring, the height of the dust is fixed by the dust discharging diversion sleeve, enabling the occurrence process to proceed stably and improving the stability; when the concentration of the generated aerosol is low, a metering disc with a smaller dust carrying capacity can be used, and when a higher concentration of aerosol is generated, a metering belt with a larger dust carrying capacity can be used, and the position of the metering belt is adjustable, increasing the concentration range of aerosol generation and realizing the generation of aerosol in a wide concentration range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the dust aerosol generating device in Embodiment 1;

[0018] Figure 2 It is a schematic diagram of the structure of the feeding device in Embodiment 1;

[0019] Figure 3 It is another schematic diagram of the structure of the feeding device in Embodiment 1;

[0020] Figure 4 It is a schematic diagram of the structure of the metering and conveying device in Embodiment 1;

[0021] Figure 5 It is a schematic diagram of the combined structure of the metering and conveying device and the feeding device in Embodiment 1;

[0022] Figure 6 It is a schematic diagram of the structure of the storage device in Embodiment 1;

[0023] Figure 7 It is a schematic diagram of the structure of the aerosol generating device in Embodiment 1;

[0024] Figure 8 It is a schematic diagram of the structure of the metering and conveying device in Embodiment 2;

[0025] Figure 9 It is a schematic diagram of the combined structure of the metering and conveying device and the feeding device in Embodiment 2.

[0026] Labels in the figure: feeding device 1, quantitative conveying device 2, storage device 3, aerosol generating device 4, main chassis 5, carrier gas purification device 6, control system 7, feeder 11, feeding drive mechanism 12, support assembly 13, height adjustment mechanism 14, dust feeding diversion sleeve 111, feeding rod 112, spring 113, discharge port 114, first sleeve 115, second sleeve 116, support 131, slider 132, guide rail 133, fixing plate 134, adjusting bolt 141, connecting plate 142, quantitative material receiving mechanism 21, material receiving drive mechanism 22, belt adjustment mechanism 23, base 231, adjusting block 232, groove 2310, adjustment hole 2321, storage hopper 31, base 32, stirring device 33, stirring drive mechanism 331, drying turntable 332, stirring blade 333, dust conveying pipe 41, ejector 42, ejection port 421, interface 422, height adjustment mechanism 43, slide rail 431, sliding block 432, support frame 433, adjustment knob 434. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1

[0029] Please refer to Figures 1-7 , the dust aerosol generating equipment provided in this embodiment includes a feeding device 1, a quantitative conveying device 2, a storage device 3, and an aerosol generating device 4. The feeding device 1 includes a feeder 11 and a feeding drive mechanism 12. The feeding port of the feeder 11 is located inside the storage device 3. The quantitative conveying device 2 includes a quantitative material receiving mechanism 21 and a material receiving drive mechanism 22. The feeding drive mechanism 12 drives the feeder 11 to feed materials to the quantitative material receiving mechanism 21, and the material receiving drive mechanism 22 drives the quantitative material receiving mechanism 21 to complete quantitative material receiving and feed materials to the aerosol generating device 4.

[0030] The feeder 11 includes a dust spiral feeding assembly and a dust feeding diversion sleeve 111. The dust feeding diversion sleeve 111 is sleeved outside the discharge port of the dust spiral feeding assembly. The quantitative material receiving mechanism 21 is located below the dust feeding diversion sleeve 111 and the aerosol generating device 4.

[0031] The dust spiral feeding assembly of this embodiment includes a feeding rod 112, a spring 113 sleeved outside the feeding rod 112, and a dust feeding diversion sleeve sleeved outside the spring 113. The dust feeding diversion sleeve of this embodiment includes a first sleeve 115 with a discharge port 114 and a second sleeve 116. The dust discharging diversion sleeve 111 is sleeved outside the discharge port 114 of the first sleeve 115. The discharge port 114 of this embodiment is a V-shaped discharge port. The feeding driving mechanism 12 of this embodiment uses a motor. The motor shaft is connected to the feeding rod 112 through a coupling. The motor drives the feeding rod 112 to rotate. The dust rotates through the spring 113 and moves upward along the feeding rod 112. When it moves to the discharge port 114, due to the centrifugal force of the rotation of the spring 113, the dust is continuously thrown out from the discharge port 114 and moves downward along the dust discharging diversion sleeve 111 under the action of gravity and falls onto the quantitative material receiving mechanism 21.

[0032] The quantitative material receiving mechanism 21 of this embodiment uses a quantitative belt. The quantitative belt of this embodiment does not only refer to the belt itself, but also includes components such as belt pulleys and a housing. The material receiving driving mechanism 22 is arranged on one side of the quantitative belt to drive the quantitative belt to move. As Figure 5 shown, the dust discharging diversion sleeve 111 of the feeding device 1 is located above the belt of the quantitative belt. The dust falling along the dust discharging diversion sleeve 111 falls onto the belt. The material receiving driving mechanism 22 uses a motor to drive the belt to move. The moving speed of the belt can be adjusted. As the belt moves, the dust is evenly scattered on the belt. Since the height of the dust discharging diversion sleeve 111 remains unchanged, the thickness of the dust scattered on the belt is consistent, realizing quantitative transportation.

[0033] The dust aerosol generating device of this embodiment further includes a main chassis 5. The storage device 3 is located inside the main chassis 5. The feeding device 1, the quantitative conveying device 2, and the aerosol generating device 4 are fixed on the main chassis 5.

[0034] The quantitative conveying device 2 of this embodiment further includes a belt adjusting mechanism 23. The belt adjusting mechanism 23 includes a base 231, an adjusting block 232, and an adjusting knob (not shown in the figure). The base 231 is fixed on the main chassis 5. There is a groove 2310 on the base 231. There are convex strips on the adjusting block 232. The convex strips are arranged in the groove 2310 and can move back and forth in the groove 2310. There is also an adjusting hole 2321 on the adjusting block 232. The adjusting knob is inserted into the adjusting hole 2321 to fix the adjusting block 232. The quantitative belt is fixedly connected to the adjusting block 232 through a U-shaped plate. By adjusting the position of the adjusting block 232 on the base 231, the relative position of the quantitative belt with respect to the dust discharging diversion sleeve 111 can be adjusted, and then the amount of dust falling onto the belt can be adjusted.

[0035] The feeding device 1 further includes a bracket assembly 13. The bracket assembly 13 includes a bracket 131, a slider 132, a guide rail 133, and a fixing plate 134. The fixing plate 134 is fixed on the main chassis 5. The guide rail 133 is fixed to the fixing plate 134. The slider 132 is arranged on the guide rail 133. The bracket 131 is fixedly connected to the slider 132. The first sleeve 115 of the feeding device 1 is fixed above the bracket 131, and the second sleeve 116 is fixed below the bracket 131. The feeding device 1 further includes a height adjusting mechanism 14. The height adjusting mechanism 14 includes an adjusting bolt 141 and a connecting plate 142. The connecting plate 142 is fixedly connected to the bracket 131. The adjusting bolt 141 is screwed onto the main chassis 5. By adjusting the depth of the adjusting bolt 141 screwed into the main chassis 5, the slider 132 can be driven to move up and down on the guide rail 133, thereby driving the feeder 11 to move up and down, and changing the distance between the dust feeding diversion sleeve 111 and the metering belt. The higher the height of the dust feeding diversion sleeve 111 is adjusted, the more dust falls onto the metering belt, and vice versa.

[0036] The storage device 3 includes a storage hopper 31, a base 32, and a stirring device 33. The storage hopper 31 is fixed on the base 32. The stirring device 33 includes a stirring drive mechanism 331, a drying turntable 332, and stirring blades 333. One end of the stirring blades 333 extends into the interior of the storage hopper 31, and the other end is fixed to the drying turntable 332. The drying turntable 332 is arranged above the base 32 and below the storage hopper 31. The stirring drive mechanism 331 uses a motor to drive the drying turntable to rotate. In this embodiment, the stirring drive mechanism 331 uses a motor to drive the drying turntable 332 to rotate, and the drying turntable 332 drives the stirring blades 333 to rotate, thereby stirring the dust inside the storage hopper 31. The storage hopper 31 is made of a metal material and has a good heat transfer effect. The drying turntable 32 heats the storage hopper 31 to prevent the dust from agglomerating due to moisture absorption.

[0037] The aerosol generating device 4 of this embodiment includes a dust conveying pipe 41 and an ejector 42. The dust conveying pipe 41 is fixed to the lower part of the ejector 42. The dust conveying pipe 41 is used to absorb dust from the metering belt. The ejector 42 has a jet outlet 421 and an interface 422. The interface 422 is used to connect to an external gas source. The negative pressure provided by the ejector 42 sucks the dust into the ejector 42, and the high-pressure gas in the ejector 42 atomizes the sucked dust and sprays it out through the jet outlet 421. The overall height of the aerosol generating device 4 is adjusted by a height adjusting mechanism 43. The height adjusting mechanism 43 includes a slide rail 431 connected beside a U-shaped plate connected to the metering belt, a sliding block 432 connected to the slide rail 431, a support frame 433 fixedly connected to the sliding block 432, and an adjusting knob 434 for locking the sliding block 432. The support frame 433 supports and fixes the ejector 42. By rotating the adjusting knob 434, the position of the sliding block 432 on the slide rail 431 can be finely adjusted, and thus the distance between the dust conveying pipe 41 on the ejector 42 and the metering belt can be adjusted.

[0038] The dust aerosol generating equipment of this embodiment further includes a carrier gas purification device 6 and a control system 7. The carrier gas purification device 6 and the control system 7 are both fixed on the main chassis 5. The carrier gas purification device 6 includes a water removal, oil removal, and particulate filtering device, which is used to reduce the influence of impurities in the carrier gas on the aerosol generating device. The control system 7 is used to store the rotational speed control of the stirring device 33 of the device 3, the feeding driving mechanism 12 of the feeding device 1, and the receiving driving mechanism 22 of the metering conveying device 2.

[0039] Before using the equipment, first add dust particles into the storage hopper 31, turn on the stirring device 33 and the drying turntable 332, and keep it running for 15 - 20 minutes to ensure that the dust particles are in a relatively dry state. Then turn on the feeding device 1. After the conveying process is stable, turn on the metering conveying device 2, the aerosol generating device 4, and the carrier gas purification device 6. During the operation, the generation concentration of the dust aerosol can be changed by adjusting the operating speeds of the feeding device 1 and the metering conveying device 2 and the height of the feeder 11. Increasing the operating speeds of the feeding device 1 and the metering conveying device 2 and increasing the height of the feeder 11 can increase the concentration of the dust aerosol, and vice versa, the concentration of the dust aerosol can be decreased.

[0040] Embodiment Two

[0041] Refer to Figures 8-9, the dust aerosol generating device provided in this embodiment also includes a feeding device 1, a quantitative conveying device 2, a storage device 3, an aerosol generating device 4, a main chassis 5, a carrier gas purification device 6, and a control system 7. The structures of the feeding device 1, the storage device 3, the aerosol generating device 4, the main chassis 5, and the carrier gas purification device 6 are exactly the same as those in the first embodiment. The difference lies in that the quantitative material receiving mechanism 21 in this embodiment uses a quantitative disk, and the dust falling along the dust feeding diversion sleeve 111 falls into the quantitative disk. The material receiving driving mechanism 22 uses a motor and is arranged at the bottom of the quantitative disk to drive the quantitative disk to rotate. The rotation speed of the quantitative disk can be adjusted. As the quantitative disk rotates, the dust is evenly scattered on the quantitative disk. Since the height of the dust feeding diversion sleeve 111 remains unchanged, the thickness of the dust scattered on the quantitative disk is consistent, realizing quantitative conveying.

[0042] During the operation of the dust aerosol generating device in this embodiment, the generation concentration of the dust aerosol can also be changed by adjusting the operating speeds of the feeding device 1 and the quantitative conveying device 2 and the height of the feeder 11. Increasing the operating speeds of the feeding device 1 and the quantitative conveying device 2 and increasing the height of the feeder 11 can increase the concentration of the dust aerosol, and vice versa can reduce the concentration of the dust aerosol. When a low-concentration aerosol needs to be generated, the quantitative conveying device 2 can use a quantitative disk, and when a high-concentration aerosol needs to be generated, the quantitative conveying device 2 uses a quantitative belt.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust aerosol generating device, characterized in that: It includes a storage device, a feeding device, a metering and conveying device, and an aerosol generating device. The feeding device includes a feeder and a feeding driving mechanism. The feeding port of the feeder is located inside the storage device. The metering and conveying device includes a metering and receiving mechanism and a receiving driving mechanism. The feeding driving mechanism drives the feeder to feed the metering and receiving mechanism, and the receiving driving mechanism drives the metering and receiving mechanism to complete metering and feeding to the aerosol generating device. The feeder includes a dust screw feeding assembly and a dust discharging and guiding sleeve. The dust discharging and guiding sleeve is sleeved outside the discharging port of the dust screw feeding assembly. The metering and receiving mechanism is located below the dust discharging and guiding sleeve and the aerosol generating device. The dust screw feeding assembly includes a feeding rod, a spring sleeved outside the feeding rod, and a dust feeding and guiding sleeve sleeved outside the spring. The top of the dust feeding and guiding sleeve is provided with a discharging port. The storage device includes a storage hopper, a base, and a stirring device. The storage hopper is fixed on the base. The stirring device includes a stirring driving mechanism, a drying turntable, and stirring blades. One end of the stirring blades extends into the storage hopper, and the other end is fixed on the drying turntable. The drying turntable is arranged above the base and below the storage hopper. The stirring driving mechanism drives the drying turntable to rotate.

2. The dust aerosol generating device according to claim 1, characterized in that: It further includes a main chassis. The storage device is located inside the main chassis. The feeding device, the metering and conveying device, and the aerosol generating device are fixed on the main chassis.

3. The dust aerosol generating device according to claim 2, characterized in that: The feeding device further includes a bracket assembly. The bracket assembly is fixed on the main chassis. The feeder and the feeding driving mechanism are fixed on the bracket assembly.

4. The dust aerosol generating device according to claim 3, wherein: The feeding device further includes a height adjusting mechanism. The height adjusting mechanism includes an adjusting bolt and a connecting plate. The connecting plate is fixedly connected with the bracket assembly. The adjusting bolt is screwed on the main chassis.

5. The dust aerosol generating device according to claim 1, characterized in that: The metering and receiving mechanism adopts a metering disc. The receiving driving mechanism is arranged at the bottom of the metering disc and drives the metering disc to rotate.

6. The dust aerosol generating device according to claim 1, wherein: The metering and receiving mechanism adopts a metering belt. The receiving driving mechanism is connected with the metering belt.

7. The dust aerosol generating device according to claim 2, wherein: It further includes a carrier gas purification device and a control system. Both the carrier gas purification device and the control system are fixed on the main chassis.

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