Dust emission simulation device

Abstract

The application provides a dust emission simulation device, which comprises a dust mixing device, a first dust mixing assembly and a second dust mixing assembly, a dust filling cavity, a first mixing cavity and a second mixing cavity which are sequentially connected, the first dust mixing assembly and the second dust mixing assembly are respectively used for stirring dust in the first mixing cavity and / or promoting dust flow, a shunt hole plate is arranged in the second mixing cavity and divides the second mixing cavity into a placing cavity and a communication cavity, the communication cavity is communicated with the first mixing cavity and has a dust injection port at an end away from the placing cavity, the second dust mixing assembly is communicated with the placing cavity and blows air towards the communication cavity, and the shunt hole plate has a plurality of ventilation strip holes with gradually increased flow areas in the direction from the first mixing cavity to the second mixing cavity, so as to shunt the air flow of the second dust mixing assembly. The dust emission simulation device provided by the application can solve the dust emission effect of the prior art.

Description

Technical Field

[0001] This invention relates to the field of experimental simulation technology for coal mine dust environment, and more specifically, to a dust generation simulation device. Background Technology

[0002] In recent years, coal mining has become more intelligent and automated, but serious dust pollution still exists in the coal mining process, endangering the life, health and safety of coal miners (such as pneumoconiosis). Moreover, when the concentration of dust in the mine reaches a certain level, it has strong combustibility and explosiveness, which can easily cause dust explosion accidents and damage some mechanical equipment.

[0003] To reduce the hazards of coal mine dust, existing technologies and equipment often require laboratory environment testing to assess dust suppression effectiveness and study optimal dust suppression parameters. However, in current dust-related experimental systems, the dust emitted by dust generation simulation devices is difficult to meet the needs of on-site simulation environments. In particular, the dust sources formed by dust generation simulation devices are not uniform or stable enough, have a small dust capacity, and cannot continuously generate dust, resulting in inaccurate experimental results. Summary of the Invention

[0004] The present invention provides a dust generation simulation device to improve the dust generation effect of existing dust generation simulation devices.

[0005] To address the aforementioned problems, the present invention provides a dust generation simulation device, comprising: a dust mixing device having a dust filling chamber, a first mixing chamber, and a second mixing chamber connected in sequence; a first dust mixing component and a second dust mixing component, the first dust mixing component and the second dust mixing component being used to agitate the dust in the first mixing chamber and the second mixing chamber and / or promote dust flow; a flow divider plate disposed within the second mixing chamber and dividing the second mixing chamber into a placement chamber and a connecting chamber, the connecting chamber being connected to the first mixing chamber and having a dust injection port at one end away from the placement chamber; the second dust mixing component being connected to the placement chamber and blowing air toward the connecting chamber; and the flow divider plate having multiple ventilation slots with gradually increasing flow areas in the direction from the first mixing chamber toward the second mixing chamber, to divert the airflow from the second dust mixing component.

[0006] Furthermore, the first mixing chamber includes a mixing chamber segment communicating with the connecting chamber. The extending direction of the mixing chamber segment and the extending direction of the second mixing chamber are perpendicular to each other. The diverting orifice plate is an arc-shaped plate with arc-shaped protrusions facing the second dust mixing assembly. The distance between the arc-shaped plate and the second dust mixing assembly gradually increases in the direction of the mixing chamber segment toward the second mixing chamber, so as to guide the fluid entering the connecting chamber from the mixing chamber segment.

[0007] Furthermore, the first mixing chamber includes a dust conveying chamber section and a mixing chamber section connected to each other, with an included angle between the dust conveying chamber section and the mixing chamber section. The first dust mixing assembly includes a dust conveying assembly and an agitation assembly. The dust conveying assembly is rotatably disposed in the dust conveying chamber section to guide the dust in the dust conveying chamber section to the mixing chamber section. The agitation assembly is disposed in the mixing chamber section to agitate the flowing dust.

[0008] Furthermore, the dust conveying assembly includes a first driving member and a dust conveying rotor. The dust conveying rotor is rotatably disposed in the first mixing chamber. The dust conveying rotor includes a plurality of rotor plates with coincident rotation axes. The shape of the rotor plates is adapted to the shape of the dust conveying chamber section and is limited to the inner wall of the dust conveying chamber section. The first driving member and the dust conveying rotor are drivenly connected.

[0009] Furthermore, the agitation assembly includes a rotating assembly and an airflow assembly. The rotating assembly is located at the communication position between the dust feeding chamber section and the mixing chamber section. The rotating assembly includes a second driving member and a rotating dust mixing blade connected to each other. The rotating dust mixing blade is rotatably arranged. The airflow assembly is located in the mixing chamber section, and the jet direction of the airflow assembly is arranged towards the rotating assembly.

[0010] Furthermore, there are at least two airflow assemblies, which are distributed circumferentially along the mixing chamber section. Each airflow assembly includes an airflow nozzle, a fan, and a flow meter. The fan and the airflow nozzle are connected to provide jet airflow to the airflow nozzle, and the flow meter is used to monitor the airflow rate.

[0011] Furthermore, the second dust mixing assembly includes a compressor, which is disposed at an opening on the side of the placement chamber opposite to the connecting chamber and is in communication with the placement chamber.

[0012] Furthermore, the dust mixing device includes a propulsion component and a dust mixing shell. The propulsion component has a dust filling chamber, and the dust mixing shell has a first mixing chamber and a second mixing chamber. The propulsion component fills the dust mixing shell with dust, and the propulsion component is connected to the dust mixing shell through an electromagnetic component.

[0013] Furthermore, the electromagnetic assembly includes an electromagnet, an electromagnetic controller, and a flexible gasket. The electromagnetic controller controls the electromagnet to connect or separate the propulsion component and the dust collection shell, and the flexible gasket is disposed between the propulsion component and the dust collection shell to achieve a sealed connection between the propulsion component and the dust collection shell.

[0014] Furthermore, the dust generation simulation device includes a primary rectifier and a secondary rectifier, which are respectively located at the openings of the placement chamber and the connecting chamber that are opposite to each other.

[0015] The present invention provides a dust generation simulation device, comprising: a dust mixing device having a dust filling chamber, a first mixing chamber, and a second mixing chamber connected in sequence; a first dust mixing component and a second dust mixing component, the first dust mixing component and the second dust mixing component being used to agitate the dust in the first mixing chamber and the second mixing chamber and / or promote dust flow; a flow divider plate disposed in the second mixing chamber and dividing the second mixing chamber into a placement chamber and a connecting chamber, the connecting chamber being connected to the first mixing chamber and having a dust injection port at one end away from the placement chamber; the second dust mixing component being connected to the placement chamber and blowing air toward the connecting chamber; and the flow divider plate having a plurality of ventilation slots with gradually increasing flow areas in the direction from the first mixing chamber toward the second mixing chamber, so as to divide the blowing airflow of the second dust mixing component. This scheme involves inputting dust into the dust mixing device through a dust filling chamber. The dust flows through a first mixing chamber and a second mixing chamber, and is evenly distributed by the agitation of the first and second dust mixing components, forming a uniform dust flow. The dust is then ejected from the dust injection nozzle under the pushing force of the first and / or second dust mixing components, thus simulating a dusty environment. This scheme achieves stratification of the blower airflow from the second dust mixing component through a flow-dividing plate with multiple ventilation slots. The flow area of ​​the multiple ventilation slots gradually increases, causing the velocity and flow rate of the stratified airflows to gradually increase from the first mixing chamber towards the second mixing chamber. This avoids the situation in existing technologies where, when the second dust mixing component directly blows air onto the dust flow falling into the second mixing chamber, most of the dust falling into the second mixing chamber is blown away by the airflow closer to the first mixing chamber, resulting in a dust flow ejected from the dust injection nozzle where the upper layer of dust density is significantly higher than the lower layer, and the uniformity of the dust flow distribution deteriorates. Furthermore, as the speed of the multiple airflows gradually increases in the direction from the first mixing chamber to the second mixing chamber, when the dust flow in the first mixing chamber enters the connecting chamber, it is easy to merge with the airflow generated by the second dust mixing component to generate eddies, further agitating the dust flow and further improving the uniformity and stability of the dust generation simulation device. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the dust generation simulation device provided in an embodiment of the present invention is shown;

[0018] Figure 2 It shows Figure 1 A top view of the dust-feeding rotor in a dust-generating simulation device;

[0019] Figure 3 It shows Figure 1 A schematic diagram of the airflow in a dust generation simulation device;

[0020] Figure 4 It shows Figure 1 A front view of the flow divider plate in the dust generation simulation device.

[0021] The above figures include the following reference numerals:

[0022] 101. Dust filling chamber; 102. First mixing chamber; 1021. Mixing chamber section; 1022. Dust conveying chamber section; 103. Second mixing chamber; 1031. Placement chamber; 1032. Connecting chamber; 104. Dust injection nozzle; 11. Propulsion component; 12. Dust mixing shell; 13. Electromagnetic assembly; 131. Electromagnet; 132. Electromagnetic controller; 133. Flexible washer;

[0023] 20. First dust mixing assembly; 21. Dust conveying assembly; 211. First driving component; 212. Dust conveying rotor; 2121. Rotor plate; 22. Rotating assembly; 221. Second driving component; 222. Rotating dust mixing blades; 23. Airflow assembly; 231. Airflow nozzle; 232. Fan; 233. Flow meter;

[0024] 30. Second dust mixing assembly; 31. Air compressor;

[0025] 40. Diverter plate; 41. Ventilation strip holes;

[0026] 51. First-stage rectifier; 52. Second-stage rectifier. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 4As shown, an embodiment of the present invention provides a dust generation simulation device, comprising: a dust mixing device having a dust filling chamber 101, a first mixing chamber 102, and a second mixing chamber 103 connected in sequence; a first dust mixing component 20 and a second dust mixing component 30, the first dust mixing component 20 and the second dust mixing component 30 being used to agitate the dust in the first mixing chamber 102 and the second mixing chamber 103 and / or promote dust flow; a flow diversion plate 40 disposed in the second mixing chamber 103 and dividing the second mixing chamber 103 into a placement chamber 1031 and a connecting chamber 1032, the connecting chamber 1032 being connected to the first mixing chamber 102 and having a dust injection port 104 at one end away from the placement chamber 1031; the second dust mixing component 30 being connected to the placement chamber 1031 and blowing air toward the connecting chamber 1032; in the direction from the first mixing chamber 102 toward the second mixing chamber 103, the flow diversion plate 40 having a plurality of ventilation slots 41 with gradually increasing flow areas to divert the blowing airflow of the second dust mixing component 30.

[0029] In this embodiment, dust is input into the dust mixing device through the dust filling chamber 101. The dust flows through the first mixing chamber 102 and the second mixing chamber 103 and is evenly distributed by the stirring of the first dust mixing component 20 and the second dust mixing component 30 to form a uniform dust flow. Under the push of the first dust mixing component 20 and / or the second dust mixing component 30, it is ejected from the dust injection port 104 to simulate the dust environment. In this embodiment, the blower airflow of the second dust mixing component 30 is stratified by a flow-dividing plate 40 with multiple ventilation slots 41. The flow area of ​​the multiple ventilation slots 41 gradually increases, so that the velocity and flow rate of the multiple airflows after stratification gradually increase in the direction from the first mixing chamber 102 to the second mixing chamber 103. This avoids the situation in the prior art where, when the second dust mixing component 30 blows air directly onto the dust flow falling into the second mixing chamber 103, most of the dust flow falling into the second mixing chamber 103 is blown away by the airflow on the side closer to the first mixing chamber 102, resulting in the dust flow ejected from the dust injection port 104 having a significantly higher upper dust density than the lower dust density and poorer uniformity of dust flow distribution. Furthermore, as the speed of the multiple airflows gradually increases in the direction from the first mixing chamber 102 toward the second mixing chamber 103, when the dust flow in the first mixing chamber 102 enters the connecting chamber 1032, it is easy to merge with the airflow generated by the second dust mixing component 30 to generate eddies, further agitating the dust flow and further improving the uniformity and stability of the dust generation simulation device.

[0030] It is understandable that the dust flow is the airflow carrying dust. The first dust mixing component 20, the second dust mixing component 30, and the flow divider plate 40 are all used to ensure the uniformity and stability of the dust distribution in the airflow, so as to improve the dust generation effect of the dust generation simulation device (including dust generation quality, dust generation stability, and dust generation uniformity).

[0031] like Figure 1 and Figure 3 As shown, the first mixing chamber 102 includes a mixing chamber section 1021 communicating with the connecting chamber 1032. The extending direction of the mixing chamber section 1021 is perpendicular to the extending direction of the second mixing chamber 103. The flow divider plate 40 is an arc-shaped plate, with its arc-shaped protrusion facing the second dust mixing assembly 30. The distance between the arc-shaped plate and the second dust mixing assembly 30 gradually increases in the direction of the mixing chamber section 1021 towards the second mixing chamber 103, thereby guiding the fluid entering the connecting chamber 1032 from the mixing chamber section 1021. This arrangement is beneficial for the arc-shaped plate to guide the dust flow towards the dust injection port 104, and also helps to generate vortices when the dust flow merges with the airflow generated by the second dust mixing assembly 30 when it enters the connecting chamber 1032, ensuring the guiding and agitation effect of the dust flow and ensuring the uniformity of the dust flow. Specifically, the extension direction of the mixing chamber 1021 and the extension direction of the second mixing chamber 103 are perpendicular to each other, which is conducive to the flow of dust in the mixing chamber 1021 into the second connecting chamber 1032.

[0032] Specifically, the first mixing chamber 102 includes a dust conveying chamber section 1022 and a mixing chamber section 1021 connected to each other, with an included angle between the dust conveying chamber section 1022 and the mixing chamber section 1021. The first dust mixing assembly 20 includes a dust conveying assembly 21 and an agitation assembly. The dust conveying assembly 21 is rotatably disposed in the dust conveying chamber section 1022 to guide the dust in the dust conveying chamber section 1022 to the mixing chamber section 1021. The agitation assembly is disposed in the mixing chamber section 1021 to agitate the flowing dust.

[0033] In this embodiment, the extension direction of the dust conveying chamber 1022 is perpendicular to the extension direction of the mixing chamber 1021 and parallel to the extension direction of the second mixing chamber 103. The dust conveying assembly 21 conveys the dust within the dust conveying chamber 1022, and the stirring assembly causes the dust to form a uniform dust flow within the mixing chamber 1021. This arrangement helps ensure the shaping and conveying effect of the dust flow, guaranteeing the reliability of the dust generation simulation device. Furthermore, the angle between the dust conveying chamber 1022 and the mixing chamber 1021 prevents the dust from falling too quickly or failing to form a uniform dust flow before entering the second mixing chamber 103, which would occur if the first mixing chamber 102 were a direct-flow chamber. It is understood that the angle between the dust conveying chamber 1022 and the mixing chamber 1021 can be adjusted according to actual conditions.

[0034] like Figure 1 and Figure 2As shown, the dust conveying assembly 21 includes a first driving member 211 and a dust conveying rotor 212. The dust conveying rotor 212 is rotatably disposed in the first mixing chamber 102. The dust conveying rotor 212 includes a plurality of rotor plates 2121 with coincident rotation axes. The shape of the rotor plates 2121 is adapted to the shape of the dust conveying chamber section 1022 and is limited to the inner wall of the dust conveying chamber section 1022. The first driving member 211 and the dust conveying rotor 212 are drivenly connected.

[0035] In this embodiment, the dust is drawn from the dust filling chamber 101 into the dust conveying chamber section 1022 by the rotation of the dust conveying rotor 212, and the dust moves towards the mixing chamber section 1021 to ensure the dust conveying effect. Specifically, the dust conveying rotor 212 is composed of 6 to 10 semi-circular rotor plates 2121 to ensure the uniformity of dust conveying. The first driving member 211 is used to drive the dust conveying rotor 212 to rotate at a uniform speed, which is generally 60 to 200 r / min. The uniformity of dust conveying is determined by the rotation speed of the dust conveying rotor 212 and the number of rotor plates 2121. Increasing the rotation speed and increasing the number of rotor plates 2121 can improve the uniform and continuous conveying effect of dust.

[0036] Furthermore, the agitation assembly includes a rotating assembly 22 and an airflow assembly 23. The rotating assembly 22 is located at the communication position between the dust conveying chamber section 1022 and the mixing chamber section 1021. The rotating assembly 22 includes a second driving member 221 and a rotating dust mixing blade 222 connected to each other. The rotating dust mixing blade 222 is rotatably arranged. The airflow assembly 23 is located in the mixing chamber section 1021, and the jet direction of the airflow assembly 23 is set towards the rotating assembly 22.

[0037] In this embodiment, the dust is agitated and propelled by the rotating dust mixing blades 222. The airflow assembly 23 is positioned towards the rotating assembly 22 and can spray air to further improve the dust mixing effect and form a uniform dust flow, ensuring the uniformity of dust generation. Specifically, the rotating dust mixing blades 222 consist of 3 to 5 blades. The dust entering the mixing chamber 1021 collides with the rotating dust mixing blades 222 and is quickly dispersed under the collision and agitation of the rotating dust mixing blades 222. This avoids the dust from becoming highly viscous due to compression and accumulation in the dust filling chamber 101, which would otherwise cause the dust entering the mixing chamber 1021 to easily agglomerate and clump, affecting the dust generation effect. Furthermore, the airflow assembly 23 can blow away or return some of the dust that has not been completely dispersed to the rotating dust mixing blades 222 for secondary dispersion. At the same time, the airflow ejected by the airflow assembly 23 can also form a vortex with the airflow generated by the rotating assembly 22, which further improves the uniformity of dust density in the dust flow and improves the uniformity of dust generation.

[0038] There are at least two airflow components 23, which are distributed circumferentially along the mixing chamber section 1021. Each airflow component 23 includes an airflow nozzle 231, a fan 232, and a flow meter 233. The fan 232 is connected to the airflow nozzle 231 to provide jet airflow to the airflow nozzle 231, and the flow meter 233 is used to monitor the airflow rate.

[0039] In this embodiment, there are four airflow components 23, which are distributed at the same height along the circumference of the mixing chamber 1021. All four airflow components 23 are located on the side of the mixing chamber 1021 near the connecting chamber 1032. The airflow nozzle 231 is a high-speed nozzle with an effective nozzle diameter of 5mm to 20mm. The fan 232 can drive the airflow to flow to the airflow nozzle 231 and discharge it from the airflow nozzle 231. The jet direction of the airflow nozzle 231 is inclined relative to the extension direction of the mixing chamber 1021 and faces the rotating component 22. The uniform airflow ejected by multiple airflows at the same time achieves a secondary impact on the falling dust. Since the airflow direction formed by the rotating dust mixing blade 222 is opposite to the airflow formed by the airflow nozzle 231, the two airflows will generate turbulent vortices when they converge. The turbulent vortices will continuously stir and mix the dust in the mixing chamber 1021, which is conducive to forming a dust flow with a high concentration consistency. After the multiple airflows and dust are fully mixed, they gradually overflow into the connecting chamber 1032. The flow meter 233 can monitor the gas flow rate in the pipeline connecting the fan 232 and the airflow nozzle 231, making it convenient for operators to adjust the pumping volume of the fan 232 according to the actual situation.

[0040] Specifically, the second dust mixing assembly 30 includes a blower 31, which is located at the opening of the placement chamber 1031 on the side opposite to the connecting chamber 1032 and is connected to the placement chamber 1031. This arrangement facilitates the selection and placement of the second dust mixing assembly 30, while ensuring the blowing effect of the second dust mixing assembly 30 on the dust in the second mixing chamber 103.

[0041] In this embodiment, the dust mixing device includes a propulsion component 11 and a dust mixing shell 12. The propulsion component 11 has a dust filling chamber 101, and the dust mixing shell 12 has a first mixing chamber 102 and a second mixing chamber 103. The propulsion component 11 fills the dust mixing shell 12 with dust, and the propulsion component 11 is connected to the dust mixing shell 12 via an electromagnetic component 13. The propulsion component 11 is a device such as an injection pump capable of pushing dust, and it is detachably mounted to facilitate dust replenishment by the operator. The connection between the dust mixing shell 12 and the propulsion component 11 via the electromagnetic component 13 facilitates quick assembly and disassembly of the propulsion component 11. Furthermore, the dust delivery flow rate of the dust delivery component 21 is determined by the propulsion speed of the dust pushed into the dust delivery chamber section 1022 by the injection pump.

[0042] like Figure 1As shown, the electromagnetic assembly 13 includes an electromagnet 131, an electromagnetic controller 132, and a flexible gasket 133. The electromagnetic controller 132 controls the electromagnet 131 to connect or separate the propulsion component 11 and the dust collection shell 12. The flexible gasket 133 is disposed between the propulsion component 11 and the dust collection shell 12 to achieve a sealed connection between the propulsion component 11 and the dust collection shell 12.

[0043] In this embodiment, an electromagnet 131 is disposed inside the dust filling chamber 101, and an electromagnetic controller 132 is electrically connected to the electromagnet 131 to control the magnetic flux of the electromagnet 131. When the pusher 11 needs to be installed for dust injection, the operator can control the electromagnetic controller 132 to energize the electromagnet 131, and then align the pusher 11 with the dust mixing shell 12, achieving adsorption connection between the two through the electromagnet 131. When the dust injection of the pusher 11 is completed or when dust needs to be replenished, the operator can use the electromagnetic controller 132 to de-energize the electromagnet 131, causing it to lose its magnetic force. The adsorption effect of the electromagnet 131 on the dust mixing shell 12 will fail, and the operator can then disassemble and reassemble the pusher 11 to replenish dust. A flexible gasket 133 is disposed on the side of the electromagnet 131 facing the dust mixing shell 12 and located at the opening edge of the dust filling chamber 101 to ensure a seal between the dust filling chamber 101 and the first mixing chamber 102, while also facilitating the disassembly and reassembly of the pusher 11.

[0044] like Figure 1 As shown, the dust generation simulation device includes a primary rectifier 51 and a secondary rectifier 52, which are respectively disposed at the openings of the placement cavity 1031 and the connecting cavity 1032, facing away from each other. In this embodiment, the primary rectifier 51 is located between the flow divider plate 40 and the blower 31, and the secondary rectifier 52 is disposed between the dust injection port 104 and the flow divider plate 40. When the blower starts, it generates airflow. After passing through the primary rectifier 51, the swirling of the airflow is reduced, which is conducive to forming a uniform forward airflow. The effect of the secondary rectifier 52 is similar to that of the primary rectifier 51. The secondary rectifier 52 is mainly used to reduce the turbulence characteristics of the dust-laden airflow, so that the dust reaching the dust injection port 104 is evenly and continuously distributed, providing a continuous and stable dust for the experimental environment.

[0045] In summary, this invention provides a large-capacity uniform dust generation simulation device. Its specific working principle is as follows: dust is added via the propulsion component 11 (injection pump). After dust addition, the dust is pushed into the first mixing chamber 102 via the dust delivery component 21. Within the first mixing chamber 102, the dust is dispersed by the rotating component 22 to prevent clumping. Then, the airflow component 23 fully mixes the dust and airflow to form a dust flow. Once the dust flow accumulates to a certain extent, it overflows from the first mixing chamber 102 into the second mixing chamber 103. Through the compressor 31, the primary rectifier 51, and the flow divider plate 40, a dust vortex is formed, further enhancing the agitation effect on the dust flow entering the second mixing chamber 103. Finally, the fully mixed and uniform dust flow is ejected from the dust injection port 104, simulating a dust environment.

[0046] To highlight the features of this invention, a comparison is made between traditional dust-generating equipment and the dust-generating simulation device provided by this invention, as shown in Table 1. In traditional dust-generating equipment, the aerosol generator often fails to meet the dust generation requirements for simulating coal mine environments; the dust concentration in the experimental environment is often below 50 mg / m³. 3 Traditional manual dust generation or fan-based dust generation methods can raise dust, but they cannot guarantee the stability of the raised dust's quality, resulting in significant fluctuations in the concentration of the dust in the experimental environment. Traditional dust generation simulation equipment does not consider the adhesion that can occur when dust accumulates, leading to substantial variations in the particle size of the ejected dust.

[0047] The method of this invention uses a large-capacity syringe pump for servo control, resulting in sufficient dust generation; the dust concentration in the experimental environment can exceed 1000 mg / m³. 3 After the dust flows through the first mixing chamber 102 and the second mixing chamber 103 and is fully mixed with the airflow, the dust emission mass at the dust injection port 104 is relatively stable, and the concentration fluctuation of the experimental environment is small. The device is equipped with rotating dust mixing blades 222, (high-speed) airflow nozzles 231, and flow divider plates 40, etc., so that the dust is fully dispersed and the adhesion phenomenon is avoided.

[0048] Table 1:

[0049]

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dust generation simulation device, characterized in that, include: The dust mixing device has a dust filling chamber (101), a first mixing chamber (102), and a second mixing chamber (103) connected in sequence; The first dust mixing component (20) and the second dust mixing component (30) are respectively used to agitate the dust in the first mixing chamber (102) and the second mixing chamber (103) and / or promote the flow of dust; A flow divider plate (40) is disposed in the second mixing chamber (103) and divides the second mixing chamber (103) into a placement chamber (1031) and a connecting chamber (1032). The connecting chamber (1032) is connected to the first mixing chamber (102) and has a dust injection port (104) at one end away from the placement chamber (1031). The second dust mixing assembly (30) is connected to the placement chamber (1031) and blows air toward the connecting chamber (1032). In the direction from the first mixing chamber (102) toward the second mixing chamber (103), the flow divider plate (40) has a plurality of ventilation strip holes (41) with gradually increasing flow area to divide the blower airflow of the second dust mixing assembly (30).

2. The dust generation simulation device according to claim 1, characterized in that, The first mixing chamber (102) includes a mixing chamber segment (1021) communicating with the connecting chamber (1032). The extending direction of the mixing chamber segment (1021) is perpendicular to the extending direction of the second mixing chamber (103). The diverting orifice plate (40) is an arc-shaped plate with an arc-shaped protrusion facing the second dust mixing assembly (30). The distance between the arc-shaped plate and the second dust mixing assembly (30) gradually increases in the direction of the mixing chamber segment (1021) toward the second mixing chamber (103) to guide the fluid entering the connecting chamber (1032) from the mixing chamber segment (1021).

3. The dust generation simulation device according to claim 1, characterized in that, The first mixing chamber (102) includes a dust conveying chamber section (1022) and a mixing chamber section (1021) connected to each other, with an included angle between the dust conveying chamber section (1022) and the mixing chamber section (1021). The first dust mixing assembly (20) includes a dust conveying assembly (21) and an agitation assembly. The dust conveying assembly (21) is rotatably disposed in the dust conveying chamber section (1022) to guide the dust in the dust conveying chamber section (1022) to the mixing chamber section (1021). The agitation assembly is disposed in the mixing chamber section (1021) to agitate the flowing dust.

4. The dust generation simulation device according to claim 3, characterized in that, The dust conveying assembly (21) includes a first driving member (211) and a dust conveying rotor (212). The dust conveying rotor (212) is rotatably disposed in the first mixing chamber (102). The dust conveying rotor (212) includes a plurality of rotor plates (2121) with coincident rotation axes. The shape of the rotor plates (2121) is adapted to the shape of the dust conveying chamber section (1022) and is limited to the inner wall of the dust conveying chamber section (1022). The first driving member (211) and the dust conveying rotor (212) are drivenly connected.

5. The dust generation simulation device according to claim 3, characterized in that, The agitation assembly includes a rotating assembly (22) and an airflow assembly (23). The rotating assembly (22) is disposed at the communication position between the dust delivery chamber section (1022) and the mixing chamber section (1021). The rotating assembly (22) includes a second driving member (221) and a rotating dust mixing blade (222) connected to each other. The rotating dust mixing blade (222) is rotatably disposed. The airflow assembly (23) is disposed in the mixing chamber section (1021), and the jet direction of the airflow assembly (23) is directed toward the rotating assembly (22).

6. The dust generation simulation device according to claim 5, characterized in that, The airflow assembly (23) is at least two, and the at least two airflow assemblies (23) are distributed circumferentially along the mixing chamber section (1021). The airflow assembly (23) includes an airflow nozzle (231), a fan (232) and a flow meter (233). The fan (232) is connected to the airflow nozzle (231) to provide jet airflow to the airflow nozzle (231). The flow meter (233) is used to monitor the airflow rate.

7. The dust generation simulation device according to claim 1, characterized in that, The second dust mixing assembly (30) includes a compressor (31), which is disposed at the opening of the placement cavity (1031) on the side opposite to the communicating cavity (1032) and communicates with the placement cavity (1031).

8. The dust generation simulation device according to claim 1, characterized in that, The dust mixing device includes a propulsion component (11) and a dust mixing shell (12). The propulsion component (11) has the dust filling chamber (101), and the dust mixing shell (12) has the first mixing chamber (102) and the second mixing chamber (103). The propulsion component (11) fills the dust mixing shell (12) with dust, and the propulsion component (11) is connected to the dust mixing shell (12) through an electromagnetic component (13).

9. The dust generation simulation device according to claim 8, characterized in that, The electromagnetic assembly (13) includes an electromagnet (131), an electromagnetic controller (132), and a flexible gasket (133). The electromagnetic controller (132) controls the electromagnet (131) to connect or separate the propulsion member (11) and the dust collection shell (12). The flexible gasket (133) is disposed between the propulsion member (11) and the dust collection shell (12) to achieve a sealed connection between the propulsion member (11) and the dust collection shell (12).

10. The dust generation simulation device according to claim 1, characterized in that, The dust generation simulation device includes a primary rectifier (51) and a secondary rectifier (52), which are respectively disposed at the openings of the placement cavity (1031) and the connecting cavity (1032) that are opposite to each other.

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