A low-concentration dust generation device

Abstract

This invention discloses a low-concentration dust generating device, including a mounting base. A dust-generating conical chamber, wider at the bottom and narrower at the top, is fixed on the mounting base. The upper end of the conical chamber is a dust outlet connected to a dust outlet pipe, which has several dust outlet nozzles. A dust-driving port connected to a compressed air source is located at the bottom of the conical chamber. An infusion tube is fixed to the bottom of the conical chamber, and its lower part is connected to the outlet of a syringe needle of an injection pump. The syringe needle contains a solution containing dust particles. The upper end of the infusion tube is an outlet extending vertically into the conical chamber. An ultrasonic atomizer is installed inside the conical chamber, with its atomizing head facing upwards and connected to the outlet of the infusion tube. This dust generating device can emit a lower concentration of dust airflow, making it suitable for simulating lower concentration dust environments.

Description

Technical Field

[0001] This invention relates to a low-concentration dust generation device, belonging to the field of dust environment simulation technology. Background Technology

[0002] Environmental simulation technology is a new interdisciplinary field, primarily researching the artificial reproduction of various natural environments and the testing techniques for products under simulated conditions. Dust environment simulation devices can be used to simulate dusty environments by placing standard dust meters and those to be calibrated in this environment, and then comparing the test results of the two meters to complete calibration and verification. Dust environment simulation equipment requires a dust-generating device. The invention disclosed in patent publication number CN211800089U describes a low-concentration dust-generating device, whose dust-generating principle involves lifting a carbon rod with a lead screw and then scraping carbon powder off the upper surface of the carbon brush with a brush. However, the dust concentration generated by this device is still relatively high, making it difficult to simulate dust environments with lower concentrations. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a low-concentration dust generating device that can emit a lower concentration of dust airflow, which is suitable for simulating a lower concentration of dust environment.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a low-concentration dust generating device, including a mounting base, on which a dust generating conical chamber, smaller at the top and larger at the bottom, is fixed. The upper end of the dust generating conical chamber is a dust outlet, which is connected to a dust outlet pipe. The dust outlet pipe is provided with several dust outlet nozzles. The bottom of the dust generating conical chamber is provided with a dust outlet drive port connected to a compressed air source. An infusion pipe is fixed at the bottom of the dust generating conical chamber. The lower part of the infusion pipe is connected to the outlet of the injection needle tube of an injection pump. The injection needle tube contains a solution containing dust particles. The upper end of the infusion pipe is an outlet and extends vertically into the dust generating conical chamber. An ultrasonic atomizer is provided inside the dust generating conical chamber. The atomizing head of the ultrasonic atomizer is arranged facing upward and is connected and cooperated with the outlet of the infusion pipe.

[0005] As a preferred embodiment, the dust-generating conical chamber includes a bottom plate, an outer conical cylinder, and an upper flange plate. The bottom plate is fixed on a mounting base, and an infusion pipe fixing structure is provided on the bottom plate. The infusion pipe passes through the infusion pipe fixing structure. An inner support is also fixed inside the bottom plate, and the ultrasonic atomizer is fixed on the inner support.

[0006] As a preferred embodiment, the outer conical cylinder is further provided with an auxiliary air inlet, which is connected to a bypass air supply pipe, and a control valve is provided on the bypass air supply pipe.

[0007] As a preferred embodiment, the center lines of the dust outlet, atomizing head, and infusion tube are arranged coaxially.

[0008] As a preferred embodiment, the mounting base includes a mounting plate, the side of which is provided with mounting lugs, and the bottom plate of the storage compartment is detachably fixed to the mounting plate.

[0009] As a preferred embodiment, the infusion tube fixing structure includes a fixing block fixed to the bottom of the chamber bottom plate, the fixing block having a through hole, the infusion tube being inserted into the through hole and extending into the dust-generating conical chamber, and the fixing block having a locking element for locking the infusion tube on its side.

[0010] As a preferred embodiment, the fixing block is fixed to the bottom plate of the bin by bolts, and the side of the fixing block is provided with a locking screw hole, and the locking element is installed in the internal thread of the locking screw hole.

[0011] As a preferred embodiment, the inner support includes several supporting columns, which are fixed to the bottom plate of the chamber. An upper fixing plate is fixed to the upper end of each supporting column. An installation notch is provided on the upper fixing plate. Supporting side strips are provided on both sides of the ultrasonic atomizer. The ultrasonic atomizer is placed in the installation notch and the supporting side strips are placed at the edge of the installation notch. A clamping plate is also provided on the upper fixing plate to press the ultrasonic atomizer tightly.

[0012] As a preferred embodiment, the dust outlet pipe is horizontally positioned, and the dust outlet nozzle is positioned downwards.

[0013] After adopting the above technical solution, the effect of the present invention is as follows: A low-concentration dust generating device includes a mounting base on which a dust-generating conical chamber (smaller at the top and larger at the bottom) is fixed. The upper end of the dust-generating conical chamber is a dust outlet, which is connected to a dust outlet pipe. Several dust outlet nozzles are provided on the dust outlet pipe. A dust outlet drive port connected to a compressed air source is provided at the bottom of the dust-generating conical chamber. An infusion pipe is fixed at the bottom of the dust-generating conical chamber. The lower part of the infusion pipe is connected to the outlet of the injection needle tube of an injection pump. The injection needle tube contains a solution containing dust particles. The upper end of the infusion pipe is an outlet and extends vertically into the dust-generating conical chamber. An ultrasonic atomizer is installed inside the dust-generating conical chamber. The atomizing head of the acoustic atomizer is positioned upwards and connected to the outlet of the infusion tube. Therefore, the aforementioned low-concentration dust generating device can emit dust with even lower concentrations. During use, an injection pump is used to squeeze the aerosol in the injection needle tube upwards. As it flows upwards, it forms droplet protrusions at the upper opening of the infusion tube. Because the infusion tube is positioned upwards, the droplet protrusions also need to overcome the gravity of the liquid itself, resulting in lower droplet protrusion heights. At this point, the atomizing head can atomize the droplet protrusions. The lower droplet protrusions allow for smaller aerosol atomization amounts, thus resulting in lower dust concentrations. This eliminates the need to increase the size of the dust simulation chamber during low-concentration testing to simulate lower dust concentration environments. The dust-laden gas after dust generation will be compressed through the dust-generating conical chamber, which is smaller at the top and larger at the bottom. At this time, the airflow compression will also overcome the settling state of the particles themselves, thereby further disturbing the dust-laden gas. Finally, the uniform dust-laden gas will flow out from the dust outlet nozzle on the dust outlet pipe. The dust outlet pipe is set inside the dust simulation chamber, and the dust flowing out of the dust outlet nozzle will be evenly dispersed in the chamber, thus completing the dust simulation.

[0014] Furthermore, since the outer conical cylinder is also equipped with an auxiliary air inlet, which is connected to a bypass air supply pipe and equipped with a control valve, the bypass air supply pipe can introduce gas from the dust simulation chamber. Therefore, in some constant temperature and humidity dust simulation environments, the temperature and humidity of the gas in the dust environment simulation chamber have been regulated. In this way, after the gas in the chamber is introduced into the outer conical cylinder, the amount of compressed air entering from the dust exhaust drive port can be reduced, thereby reducing the temperature and humidity fluctuations of the dust environment in the dust environment simulation chamber.

[0015] Furthermore, since the infusion tube fixing structure includes a fixing block fixed to the bottom of the chamber bottom plate, and the fixing block is provided with a through hole, the infusion tube is inserted into the through hole and extends into the dust-generating cone chamber, and the side of the fixing block is provided with a locking member to lock the infusion tube, the fixing of the infusion tube is very convenient, and the side locking member can better lock the infusion tube.

[0016] Furthermore, the internal support includes several supporting columns, which are fixed to the bottom plate of the chamber. An upper fixing plate is fixed to the upper end of each supporting column, and an installation notch is provided on the upper fixing plate. Supporting side strips are provided on both sides of the ultrasonic nebulizer. The ultrasonic nebulizer is placed within the installation notch, and the supporting side strips are positioned at the edge of the installation notch. A clamping plate is also provided on the upper fixing plate to press the ultrasonic nebulizer firmly. This internal support has a simple structure. After the ultrasonic nebulizer is fixed to the upper fixing plate by the supporting side strips, it is then pressed and fixed by the clamping plate. At this time, the height of the nebulizing head is constant, and the infusion tube can be directly inserted into the through hole. The height of the upper end of the infusion tube can be adjusted before locking. In this way, the relative height between the infusion tube and the nebulizing head can be adjusted to ensure the nebulization effect. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional structural view of an embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional structural view of the dust-generating conical chamber according to an embodiment of the present invention;

[0020] Figure 3 It is a 3D view that hides the outer conical cylinder;

[0021] Figure 4 It is a cross-sectional view of the dust-generating conical hopper and its interior;

[0022] Figure 5 This is a three-dimensional structural diagram of an ultrasonic atomizer;

[0023] In the attached diagram: 1. Dust generating device; 2. Mounting plate; 3. Mounting lug; 4. Dust outlet pipe; 5. Dust outlet nozzle; 11. Dust generating cone; 111. Silo bottom plate; 112. Outer conical cylinder; 113. Upper flange; 114. Dust outlet; 12. Fixing element; 121. Locking element; 13. Dust outlet drive port; 14. Inner bracket; 141. Support column; 142. Upper fixing plate; 143. Pressure plate; 15. Ultrasonic atomizer; 151. Support side strip; 16. Infusion pipe; 17. Atomizing head; 18. Auxiliary air inlet. Detailed Implementation

[0024] The present invention will be further described in detail below through specific embodiments.

[0025] like Figures 1 to 5As shown, a low-concentration dust generating device 1 includes a mounting base on which a dust-generating conical chamber 11, smaller at the top and larger at the bottom, is fixed. The mounting base includes a mounting plate 2, and mounting lugs 3 are provided on the side of the mounting plate 2. These mounting lugs 3 facilitate the suspension and fixation of the entire low-concentration dust generating device 1.

[0026] In this embodiment, the upper end of the dust-generating conical chamber 11 is a dust outlet 114, which is connected to the dust outlet pipe 4. The dust outlet pipe 4 is provided with a plurality of dust outlet nozzles 5. The dust outlet pipe 4 is horizontally arranged, and the dust outlet nozzles 5 are arranged downwards and at equal intervals.

[0027] The bottom of the dust-generating conical chamber 11 is provided with a dust discharge drive port 13 that is connected to a compressed air source, which can be a compressed air cylinder or other fan.

[0028] The bottom of the dust-generating conical chamber 11 is fixed with an infusion tube 16. The lower part of the infusion tube 16 is connected to the outlet of the injection needle tube of the injection pump. The injection needle tube contains a solution containing dust particles. The upper end of the infusion tube 16 is the outlet and extends vertically into the dust-generating conical chamber 11. An ultrasonic atomizer 15 is installed inside the dust-generating conical chamber 11. The atomizing head 17 of the ultrasonic atomizer 15 is arranged facing upward and is connected to the outlet of the infusion tube 16.

[0029] The syringe pump is an existing structure that can be purchased.

[0030] During use, the aerosol in the syringe is slowly squeezed by the syringe pump, causing the aerosol to flow upward along the infusion tube 16 and form a droplet protrusion at the upper opening of the infusion tube 16. Since the infusion tube 16 is set upward, the droplet protrusion also needs to overcome the gravity of the liquid itself. Therefore, under the same squeezing force of the syringe, the height of the droplet protrusion is lower. The droplet protrusion contacts the atomizing head 17, and the vibration of the atomizing head 17 can atomize the droplet protrusion. In this way, the lower height of the droplet protrusion can control the amount of aerosol atomization to be smaller, and the dust concentration emitted is lower.

[0031] The dust-laden gas after dust generation will be compressed through the dust-generating conical chamber 11, which is smaller at the top and larger at the bottom. At this time, the airflow contraction will also overcome the settling state of the particles themselves, thereby further gathering the dust-laden gas and causing the dust to flow in the opposite direction against gravity. The dust will be better gathered, and finally the uniform dust-laden gas will flow out from the dust outlet 5. The dust-laden gas flowing out from the dust outlet 5 will enter the dust environment simulation chamber. Due to the sudden increase in space, a more uniform low-concentration dust environment can be obtained in the dust simulation chamber.

[0032] like Figures 2 to 4As shown, the dust-generating conical chamber 11 includes a bottom plate 111, an outer conical cylinder 112, and an upper flange plate 113. The bottom plate 111 is fixed to the mounting base by bolts. A liquid infusion tube 16 fixing structure is provided on the bottom plate 111, and the liquid infusion tube 16 passes through the liquid infusion tube 16 fixing structure. An inner support 14 is also fixed inside the bottom plate 111, and the ultrasonic atomizer 15 is fixed on the inner support 14. The bottom plate 111 is detachably fixed to the mounting plate 2.

[0033] The outer conical cylinder 112 is also provided with an auxiliary air inlet 18, which is connected to a bypass air supply pipe. The bypass air supply pipe is equipped with a control valve. In actual use, the dust outlet pipe 4 is placed into the dust environment simulation chamber, and the bypass air supply pipe can utilize the gas in the dust environment simulation chamber.

[0034] The dust environment simulation chamber is equipped with an exhaust duct that is connected to an exhaust fan and a dust filter. Therefore, the air supply duct can be connected to the exhaust duct, so that the filtered gas does not remain inside the outer cone 112, which reduces the amount of compressed air and thus reduces the fluctuations in temperature and humidity of the simulated environment.

[0035] like Figure 4 As shown, the center lines of the dust outlet 114, the atomizing head 17, and the infusion tube 16 are coaxially arranged. The infusion tube 16 fixing structure includes a fixing block 12 fixed to the bottom of the chamber bottom plate 111. The fixing block 12 is provided with a through hole. The infusion tube 16 is inserted into the through hole and extends into the dust-generating conical chamber 11. The side of the fixing block 12 is provided with a locking member 121 for locking the infusion tube 16.

[0036] The fixing block 12 is fixed to the bottom plate 111 of the silo by bolts. The side of the fixing block 12 is provided with a locking screw hole, and the locking member 121 is installed in the internal thread of the locking screw hole.

[0037] like Figure 5 As shown, the inner support 14 includes several support columns 141, which are fixed to the bottom plate 111. An upper fixing plate 1422 is fixed to the upper end of the support column 141. An installation notch is provided on the upper fixing plate 1422. Support side strips 151 are provided on both sides of the ultrasonic atomizer 15. The ultrasonic atomizer 15 is set in the installation notch and the support side strips 151 are placed at the edge of the installation notch. A clamping plate 143 is also provided on the upper fixing plate 1422 to press the ultrasonic atomizer 15.

[0038] In this embodiment, the low-concentration dust generation device 1 uses an injection pump to squeeze the liquid in the injection needle upwards, and then the liquid is atomized by the vibration of the atomizing head 17 of the ultrasonic atomizer 15. Dust particles are distributed in the solution in the injection needle, and the atomized liquid atomizes the dust particles to form a low-concentration aerosol, thereby completing the low-concentration dust generation.

[0039] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and alterations made to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A low-concentration dust generating device, comprising a mounting base, characterized in that: The mounting base is fixed with a dust-generating conical chamber that is smaller at the top and larger at the bottom. The upper end of the dust-generating conical chamber is a dust outlet, which is connected to a dust outlet pipe. The dust outlet pipe is provided with several dust outlet nozzles. The bottom of the dust-generating conical chamber is provided with a dust outlet drive port that is connected to a compressed air source. An infusion pipe is fixed at the bottom of the dust-generating conical chamber. The lower part of the infusion pipe is connected to the liquid outlet of the injection needle tube of the injection pump. The injection needle tube contains a solution containing dust particles. The upper end of the infusion pipe is an outlet that extends vertically into the dust-generating conical chamber. An ultrasonic atomizer is provided inside the dust-generating conical chamber. The atomizing head of the ultrasonic atomizer is set upward and is connected and matched with the liquid outlet of the infusion pipe.

2. The low-concentration dust generating device as described in claim 1, characterized in that: The dust-generating conical chamber includes a bottom plate, an outer conical cylinder, and an upper flange plate. The bottom plate is fixed on a mounting base. An infusion pipe fixing structure is provided on the bottom plate. The infusion pipe passes through the infusion pipe fixing structure. An inner support is also fixed inside the bottom plate. The ultrasonic atomizer is fixed on the inner support.

3. The low-concentration dust generating device as described in claim 2, characterized in that: The outer conical cylinder is also provided with an auxiliary air inlet, which is connected to a bypass air supply pipe, and a control valve is provided on the bypass air supply pipe.

4. The low-concentration dust generating device as described in claim 3, characterized in that: The dust outlet, atomizing head, and infusion tube are arranged coaxially.

5. The low-concentration dust generating device as described in claim 4, characterized in that: The mounting base includes a mounting plate, and the side of the mounting plate is provided with mounting lugs. The bottom plate of the silo can be detachably fixed to the mounting plate.

6. The low-concentration dust generating device as described in claim 5, characterized in that: The infusion tube fixing structure includes a fixing block fixed to the bottom of the chamber bottom plate. The fixing block is provided with a through hole. The infusion tube is inserted into the through hole and extends into the dust-generating cone chamber. The side of the fixing block is provided with a locking element to lock the infusion tube.

7. A low-concentration dust generating device as described in claim 6, characterized in that: The fixing block is fixed to the bottom plate of the bin by bolts. The side of the fixing block is provided with a locking screw hole, and the locking element is installed in the internal thread of the locking screw hole.

8. The low-concentration dust generating device as described in claim 7, characterized in that: The inner support includes several support columns, which are fixed to the bottom plate of the chamber. An upper fixing plate is fixed to the upper end of the support column. An installation notch is provided on the upper fixing plate. Support side strips are provided on both sides of the ultrasonic atomizer. The ultrasonic atomizer is placed in the installation notch and the support side strips are placed at the edge of the installation notch. A clamping plate is also provided on the upper fixing plate to press the ultrasonic atomizer tightly.

9. A low-concentration dust generating device as described in claim 1, characterized in that: The dust outlet pipe is set horizontally, and the dust outlet nozzle is set downwards.

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