A dust environment simulation device

Abstract

The present invention discloses a dust environment simulation device, comprising: a simulation chamber, a grading component, a storage component, a fan-shaped nozzle and a moving mechanism. A dust concentration detector is installed in the simulation chamber, the grading component is installed outside the simulation chamber, the grading component is suitable for screening dust according to particle size, the storage component is located in the simulation chamber, the storage component includes a plurality of storage boxes, and the plurality of storage boxes are suitable for storing dust of different particle sizes after screening. The grading component is connected to the storage box so as to be suitable for inputting the classified dust into the storage box, an air intake pipe is provided on the storage box, the air intake pipe is suitable for an external blower, the fan-shaped nozzle is docked with a separate storage box so as to be suitable for spraying the dust in the corresponding storage box into the simulation chamber, the dust is screened and stored separately according to particle size, and the required particle size is selected according to actual needs and discharged separately to accurately adjust the dust concentration.

Description

Technical Field

[0001] The present invention relates to the technical field of dust environment simulation, and in particular to a dust environment simulation device. Background Art

[0002] At present, accurate detection and control of dust concentration is of great significance in many fields such as modern industry and environmental monitoring. It is related to occupational health, product quality and safety in industries such as mining and building materials processing, and helps to assess air quality and policy formulation in environmental monitoring. The calibration of dust concentration detectors requires the use of dust environment simulation devices, so the control of dust concentration in the environment is particularly important. The existing dust environment simulation devices are not convenient for adjusting the dust concentration, so it is difficult to detect the test results of dust concentration detectors in environments with different dust concentrations.

[0003] After searching, it was found that the patent with announcement number CN221405282U discloses a dust environment simulation device, which includes a dust simulation bin, etc., and the material is fed through the guide bin, and the powder enters the feed pipe through the inclined surface of the inner wall of the guide bin. The external control device can also be used to control the electric telescopic rod to drive the leakage adjustment plate to move up and down to adjust the dust concentration. It has the characteristics of strong practicality and adjustable dust concentration; however, in this scheme, the feeding rate is controlled by moving the leakage adjustment plate up and down to achieve the effect of adjusting the dust concentration in the environment, but the effect of adjusting the concentration in this way is not good. Similarly, in the prior art, there is also a method of controlling the dust concentration by moving the leakage adjustment plate up and down. The dust concentration in the environment can be adjusted by changing the airflow. However, these methods have fundamental problems. The same batch of dust may have different particle sizes. Different particles have different physical properties such as sedimentation velocity and suspension time, and their distribution and movement states in the air after mixing are different. Even if uniform spraying or uniform feeding is adopted, it is difficult to accurately control and predict the actual distribution and concentration changes of dust due to differences in particle characteristics, resulting in the inability to accurately adjust the dust concentration in the simulated environment. The calibration error of the dust concentration detector is large and the accuracy is low, affecting the reliability and effectiveness of the detector in actual applications. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects in the prior art and provide a dust environment simulation device that screens the dust, stores it separately according to particle size, and selects the required particle size for separate discharge according to actual needs to accurately adjust the dust concentration.

[0005] In order to solve the above technical problems, the technical solution of the present invention is a dust environment simulation device, comprising:

[0006] A simulation room, wherein a dust concentration detector is installed in the simulation room;

[0007] A classification component, the classification component is installed outside the simulation chamber, and the classification component is suitable for screening dust according to particle size;

[0008] A storage assembly is located in the simulation chamber and includes a plurality of storage boxes, each of which is suitable for storing dust of different particle sizes after screening. The grading assembly is connected to the storage boxes to input the classified dust into the storage boxes. The storage boxes are provided with air intake pipes, which are suitable for connecting to an external blower.

[0009] a fan-shaped nozzle, the fan-shaped nozzle being docked with the individual storage boxes so as to be suitable for spraying the dust in the corresponding storage box into the simulation chamber;

[0010] A moving mechanism is connected to the fan-shaped nozzle to drive the fan-shaped nozzle to dock with any of the storage boxes, and then cooperates with the blower to spray dust of a specified particle size, thereby adjusting the dust concentration in the simulation chamber.

[0011] Furthermore, the hierarchical component includes:

[0012] A coaxially arranged grading cylinder and a centrifugal cylinder, wherein the grading cylinder is mounted on the simulation chamber and the centrifugal cylinder is rotatably mounted in the grading cylinder;

[0013] a rotation drive mechanism, the rotation drive mechanism being mounted on the classifying cylinder and connected to the centrifugal cylinder to drive the centrifugal cylinder to rotate;

[0014] A plurality of annular screens are arranged at intervals in the centrifugal cylinder, wherein the plurality of annular screens divide the inner space of the grading cylinder into a plurality of concentric annular screening chambers;

[0015] A plurality of conical receiving boxes corresponding to the screening cavities, the conical receiving boxes being connected to the bottom of the grading cylinder, the grading cylinder being provided with through slots corresponding to the screening cavities and running through the grading cylinder, the through slots being communicated with the corresponding screening cavities and the inner spaces of the conical receiving boxes respectively;

[0016] The mesh sizes of the plurality of screens gradually decrease outward from the center of the centrifugal drum, and the centrifugal drum is suitable for being driven to rotate so as to drive the dust to pass through the corresponding screens according to the particle size, and then enter the corresponding conical storage box;

[0017] The conical storage boxes are arranged radially from outside to inside, and the storage boxes are arranged in layers vertically from bottom to top. The outermost conical storage box corresponds to the storage box at the bottom, and adjacent conical storage boxes correspond to adjacent storage boxes. A conveying pipe is provided between the conical storage box and the corresponding storage box.

[0018] Furthermore, the rotation drive mechanism includes a first drive motor, a first driving gear, and a first driven gear, wherein the first drive motor is mounted on the classifying cylinder, the first driven gear is fixedly sleeved on the centrifugal cylinder, the first driving gear is rotatably mounted on the classifying cylinder, the first driven gear is meshed with the first driving gear, and the first drive motor is connected to the first driving gear to drive the first driving gear to rotate;

[0019] The moving mechanism includes a second drive motor, a bracket, and a threaded rod, the bracket being connected to the storage box, the second drive motor being mounted on the bracket, the threaded rod being rotatably mounted on the bracket, the fan-shaped nozzle being mounted on the outside of the threaded rod, and the second drive motor being connected to the threaded rod to drive the threaded rod to rotate, thereby driving the fan-shaped nozzle to move along the axis of the threaded rod;

[0020] A chute is provided on the storage box, and a slider is provided on the fan-shaped nozzle. The slider is slidably arranged in the chute.

[0021] Furthermore, a plurality of the screening cavities are respectively provided with a fixing ring, the fixing ring being fixedly connected to the grading cylinder, and a plurality of vibration mechanisms arranged at intervals are provided in the fixing ring, the vibration mechanisms being suitable for vibrating the corresponding screens;

[0022] The vibration mechanism includes a rotating rod, a first cam, and a first spring. The rotating rod is rotatably mounted in the fixing ring. The first cam is fixedly sleeved on the outer circumference of the rotating rod. The first spring is sleeved on the outside of the rotating rod. One end of the first spring is connected to the grading cylinder, and the other end of the first spring is connected to the first cam.

[0023] A contact portion is provided on the first cam, and the contact portion contacts the corresponding screen. The screen is suitable for generating a thrust on the contact portion when driven to rotate, thereby driving the first cam to produce an angular offset. The first cam is suitable for being reset by the first spring after the angular offset to hit the corresponding screen to generate vibration.

[0024] Furthermore, the storage box is provided with a feed port and a discharge port, the feed port is suitable for passing dust into the storage box, an outer roller is fixedly provided at the discharge port, an inner roller is rotatably installed at the discharge port, the inner roller is located inside the outer roller, and both the inner roller and the outer roller are provided with a matching groove running through them;

[0025] The inner roller is provided with a support rod, and the support rod passes through the outer roller and the storage box to the outside of the storage box, and a second spring is sleeved on the part of the support rod located outside the storage box, one end of the second spring is connected to the storage box, and the other end of the second spring is connected to the support rod, and the support rod is connected to a connecting rod through a one-way bearing, and the connecting rod is connected to a driving gear, and a rack is provided on the fan-shaped nozzle, and the rack is suitable for following the fan nozzle to move from bottom to top toward the storage box, so that the rack is engaged with the corresponding driving gear, thereby driving the driving gear, the connecting rod, the support rod and the inner roller to rotate, and aligning the matching groove of the outer roller with the inner roller to open the discharge port;

[0026] A rotating shaft is rotatably mounted on the storage box, a switch plate corresponding to the feed port is fixedly sleeved on the rotating shaft, a synchronous belt is sleeved between the rotating shaft and the support rod via a synchronous wheel, and when the inner roller is driven to deflect the angle to open the discharge port, the rotating shaft follows the support rod through the synchronous belt to rotate to the switch plate to close the corresponding feed port;

[0027] When the rack is disengaged from the driving gear, the support rod is reset by the second spring, thereby driving the inner roller to reset to close the discharge port, and driving the switch plate to reset to open the feed port;

[0028] When the rack moves from top to bottom following the fan-shaped nozzle, it engages with the driving gear and cannot drive the support rod to rotate.

[0029] Furthermore, the connecting rod is hollow, and an extension rod is connected to the support rod. The extension rod passes through the one-way shaft and the inside of the connecting rod to the outside of the connecting rod. A first installation box is connected to the protruding part of the extension rod, and an infrared receiver is installed on the first installation box. A controller is provided in the first installation box. A second installation box is provided on the storage box, and an infrared transmitter is installed on the second installation box. The infrared receiver is connected to the controller, and the controller is connected to an external blower. The first installation box is suitable for rotating with the inner roller. When the inner roller is driven to rotate to open the discharge port, the infrared receiver is aligned with the infrared transmitter. The infrared receiver is suitable for feeding back the received signal to the controller, and the controller is suitable for starting the blower after receiving the signal.

[0030] Furthermore, an inclined plate is movably provided in the storage box, the upper end of the inclined plate is located at the feed port, the lower end of the inclined plate is located at the discharge port, and a plurality of third springs are spaced apart on both sides of the inclined plate, and the two ends of the third spring are respectively connected to the inclined plate and the storage box;

[0031] The bottom of the centrifugal cylinder is connected to a rotating rod, which passes through the grading cylinder and all the storage boxes. A plurality of second cams corresponding to the storage boxes are fixedly sleeved on the rotating rod. A matching block is provided at the high end of the inclined plate. The second cam is adapted to be driven to rotate and intermittently squeeze the matching block to drive the corresponding inclined plate to vibrate.

[0032] A baffle is provided in the storage box, and the baffle is adjacent to the discharge port. A guide portion is provided on the baffle, and the guide portion is in contact with the matching groove of the outer roller. A straight groove is provided on the baffle that runs through itself, and the straight groove is suitable for guiding dust to the guide portion, thereby allowing the dust to enter the matching groove of the outer roller.

[0033] Furthermore, the internal space of the fan-shaped nozzle includes a high-speed area, two medium-speed areas, and two low-speed areas. A spoiler is fixedly provided at the high-speed area. The spoiler is hollow and has a diversion groove running through it. The diversion groove is suitable for diverting part of the dust and airflow passing through the high-speed area into the medium-speed area. The diversion groove is provided with an arc-shaped diversion portion.

[0034] An adjustment plate is provided between the adjacent medium-speed area and the low-speed area, a docking rod is provided on one end of the adjustment plate close to the storage box, the other end of the adjustment plate is a swing end, the docking rod is rotatably mounted on the fan-shaped nozzle, and a swing adjustment mechanism is provided on the adjustment plate, the swing adjustment mechanism is suitable for driving the swing end of the adjustment plate to produce an angular deviation, thereby changing the flow rate of dust and airflow passing through the low-speed area;

[0035] A plurality of wind-powered impellers arranged at intervals are rotatably mounted at the outlet of the fan-shaped nozzle, and the wind-powered impellers are suitable for pulling part of the airflow and dust passing through the fan-shaped nozzle upward.

[0036] Furthermore, the swing adjustment mechanism is a balancing block, which is connected to the swing end of the adjustment plate. The airflow passing through the medium-speed area and the low-speed area is suitable for contacting the balancing block, thereby driving the adjustment plate to swing to balance the flow rate of the airflow passing through the medium-speed area and the low-speed area.

[0037] Furthermore, the swing adjustment mechanism includes a third drive motor, a second driving gear, and a second driven gear, the third drive motor is mounted on the fan-shaped nozzle, the second driving gear and the second driven gear are both rotatably mounted on the fan-shaped nozzle, the second driving gear is meshed with the second driven gear, the third drive motor is connected to the second driving gear, and is suitable for driving the second driving gear and the second driven gear to rotate in opposite directions, the second driving gear is provided with a spacer block, the spacer block is provided with a first toggle plate, the second driven gear is provided with a second toggle plate, and the first toggle plate and the second toggle plate do not contact when the second driving gear and the second driven gear rotate in opposite directions;

[0038] Both of the docking rods pass through the fan-shaped nozzle and extend to the outside of the fan-shaped nozzle. A fourth spring is sleeved on the extended part of the docking rod. The two ends of the fourth spring are respectively connected to the docking rod and the fan-shaped nozzle. A first force plate is fixedly sleeved on the docking rod adjacent to the second driving gear, and a second force plate is fixedly sleeved on the docking rod adjacent to the second driven gear. The first toggle plate is suitable for being driven to rotate and thereby squeeze the first force plate, thereby forcing the adjustment plate corresponding to the first force plate to deviate toward the adjacent low-speed area. The second toggle plate is suitable for being driven to rotate and thereby squeeze the second force plate, thereby forcing the adjustment plate corresponding to the second force plate to deviate toward the adjacent low-speed area.

[0039] By adopting the above technical solution, the present invention has the following beneficial effects:

[0040] 1. Through the setting of structures such as grading cylinder, centrifugal cylinder and multi-layer screen, the incoming dust is screened according to particle size by centrifugal force through the rotation of centrifugal cylinder and multi-layer screen. After screening, it enters the designated storage box through the corresponding conical storage box for separate storage. When in use, the fan-shaped nozzle is driven by the moving mechanism to move to the required storage box, and the dust of uniform particle size in the storage box is discharged. Since the dust discharged each time is of uniform particle size, the dust concentration in the environment is more convenient and accurate to adjust, and the storage boxes are distributed vertically. The smaller the dust particles are, the lower the position is. The small dust particles discharged are at the bottom and the large particles are at the top, so as to avoid the large dust particles from settling too quickly.

[0041] 2. By setting up structures such as the driving gear, rack, synchronous belt and the second spring, when the storage box corresponding to the dust to be discharged is selected, the fan-shaped nozzle is moved to the storage box. During the movement, the meshing of the rack and the driving gear drives the rotation of the inner roller to open the channel between the storage box and the fan-shaped nozzle. At the same time, the synchronous belt is driven to rotate the switch plate to close the feed port. The infrared receiver is then driven to rotate so that the infrared receiver is aligned with the infrared transmitter and the blower is driven to work, ensuring that while blowing the dust in the storage box, the airflow is prevented from flowing back into the conical storage box and the screening cavity. After the spraying is completed, the driving gear is disconnected from the rack, and the discharge port and the blower are automatically closed by the second spring. The feed port is automatically opened to fill the storage box again, reducing excessive manual intervention.

[0042] 3. Through the arrangement of structures such as spoilers, adjustment plates and wind-powered impellers, the diversion grooves and arc-shaped diversion parts of the spoilers disperse the high-speed airflow to the medium-speed area, reduce the local flow velocity differences, and improve the uniformity of dust suspension. The wind-powered impeller is driven by airflow to rotate, pulling part of the dust upward, prolonging the suspension time, and more realistically simulating the dust diffusion scene in open spaces. The swing end of the adjustment plate is dynamically adjusted in angle through a balance block or a third motor to balance the flow velocity of the airflow passing through the medium-speed area and the low-speed area, avoiding the low flow velocity in the low-speed area resulting in uneven dust spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 Schematic diagram of the positional relationship between the dust removal device and the simulation chamber of the present invention;

[0045] Figure 3 Schematic diagram of the overall structure of the dust removal device of the present invention;

[0046] Figure 4 This is a schematic diagram of the internal structure of the grading cylinder of the present invention;

[0047] Figure 5 Schematic diagram of the internal structure of the centrifuge cylinder of the present invention;

[0048] Figure 6 It is a planar cross-sectional view of the grading drum of the present invention;

[0049] Figure 7 This is a schematic diagram of the bottom structure of the centrifuge cylinder of the present invention;

[0050] Figure 8 It is a schematic structural diagram of the vibration mechanism of the present invention;

[0051] Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle;

[0052] Figure 10 It is a schematic diagram of the storage component structure of the present invention;

[0053] Figure 11 Schematic diagram of the internal structure of a single storage box of the present invention Figure 1 ;

[0054] Figure 12 Schematic diagram of the internal structure of a single storage box of the present invention Figure 2 ;

[0055] Figure 13 For the present invention Figure 12 Enlarged view of point B in the middle;

[0056] Figure 14 This is a schematic diagram of the internal structure of the fan-shaped nozzle of the present invention;

[0057] Figure 15 This is a schematic diagram of the bottom structure of the fan-shaped nozzle of the present invention;

[0058] In the picture: 1. Simulation room; 2. Dust concentration detector;

[0059] 3. Classifying assembly; 31. Classifying cylinder; 32. Centrifugal cylinder; 33. First drive motor; 34. First driving gear; 35. First driven gear; 36. Screen; 37. Screening chamber; 38. Conical storage box; 39. Delivery tube; 310. Fixing ring; 311. Rotating rod; 312. First cam; 313. Contact portion; 314. First spring;

[0060] 4. Storage assembly; 41. Storage box; 43. Feed port; 44. Air inlet pipe; 45. Discharge port; 46. Fan-shaped nozzle; 47. Second drive motor; 48. Bracket; 49. Threaded rod; 410. Rack; 411. Drive gear; 412. Connecting rod; 413. Support rod; 414. Inner roller; 415. Outer roller; 416. First installation box; 417. Second installation box; 418. Infrared receiver; 419. Infrared transmitter; 420. Second spring; 421. Synchronous belt; 422. Rotating shaft; 423. Switch plate; 424. Tilt plate; 425. Third spring; 426. Rotating rod; 427. Second cam; 428. Matching block; 429. Baffle; 430. Guide;

[0061] 51. High-speed area; 52. Medium-speed area; 53. Low-speed area; 54. Spoiler; 55. Diverter groove; 56. Arc-shaped diverter; 57. Adjustment plate; 58. Balance block; 59. Docking rod; 510. Second force plate; 511. Fourth spring; 512. Third drive motor; 513. Second driving gear; 514. Second driven gear; 515. Second toggle plate; 516. First toggle plate; 517. First force plate; 518. Wind-powered impeller. DETAILED DESCRIPTION

[0062] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0063] Example 1: Figure 1-3 As shown, a dust environment simulation device includes:

[0064] A simulation room 1, wherein a dust concentration detector 2 is installed in the simulation room 1;

[0065] The grading component 3 is installed outside the simulation chamber 1 and is suitable for screening the dust according to particle size;

[0066] The storage assembly 4 is located in the simulation chamber 1 and includes a plurality of storage boxes 41. The plurality of storage boxes 41 are suitable for storing dust of different particle sizes after screening. The classification assembly 3 is connected to the storage boxes 41 to be suitable for inputting the classified dust into the storage boxes 41. The storage boxes 41 are provided with air inlet pipes 44, which are suitable for connecting to an external blower.

[0067] a fan-shaped nozzle 46 , the fan-shaped nozzle 46 being docked with a separate storage box 41 so as to be suitable for spraying the dust in the corresponding storage box 41 into the simulation chamber 1 ;

[0068] The moving mechanism is connected to the fan-shaped nozzle 46 to drive the fan-shaped nozzle 46 to dock with any storage box 41, and then cooperate with the blower to spray dust of specified particle size, thereby adjusting the dust concentration in the simulation chamber 1.

[0069] like Figure 4-7 As shown, the hierarchical component 3 includes:

[0070] The classifying cylinder 31 and the centrifugal cylinder 32 are coaxially arranged, the classifying cylinder 31 is installed on the simulation chamber 1, and the centrifugal cylinder 32 is rotatably installed in the classifying cylinder 31;

[0071] A rotary drive mechanism is mounted on the classifying cylinder 31 and is connected to the centrifugal cylinder 32 to drive the centrifugal cylinder 32 to rotate;

[0072] A plurality of annular screens 36 are arranged at intervals in the centrifugal cylinder 32, and the plurality of screens 36 divide the internal space of the grading cylinder 31 into a plurality of concentric annular screening chambers 37;

[0073] A plurality of conical receiving boxes 38 corresponding to the screening cavities 37 are connected to the bottom of the grading cylinder 31. The grading cylinder 31 is provided with through slots corresponding to the screening cavities 37 and running through the grading cylinder 31. The through slots are respectively communicated with the corresponding screening cavities 37 and the inner spaces of the conical receiving boxes 38;

[0074] The mesh sizes of the plurality of screens 36 gradually decrease outward from the center of the centrifugal drum 32. The centrifugal drum 32 is adapted to be driven to rotate so as to drive the dust to pass through the corresponding screens 36 according to the particle size and then enter the corresponding conical receiving box 38.

[0075] The conical storage boxes 38 are arranged in sequence from outside to inside in the radial direction, and the storage boxes 41 are arranged in layers from bottom to top in the vertical direction. The outermost conical storage box 38 corresponds to the bottommost storage box 41, and the adjacent conical storage boxes 38 correspond to the adjacent storage boxes 41. A conveying pipe 39 is provided between the conical storage box 38 and the corresponding storage box 41.

[0076] like Figure 3-4 As shown, the rotation drive mechanism includes a first drive motor 33, a first driving gear 34 and a first driven gear 35. The first drive motor 33 is mounted on the classifying cylinder 31, the first driven gear 35 is fixedly sleeved on the centrifugal cylinder 32, the first driving gear 34 is rotatably mounted on the classifying cylinder 31, the first driven gear 35 is engaged with the first driving gear 34, and the first drive motor 33 is connected to the first driving gear 34 to drive the first driving gear 34 to rotate;

[0077] The moving mechanism includes a second drive motor 47, a bracket 48, and a threaded rod 49. The bracket 48 is connected to the storage box 41. The second drive motor 47 is mounted on the bracket 48. The threaded rod 49 is rotatably mounted on the bracket 48. The fan-shaped nozzle 46 is assembled on the outside of the threaded rod 49. The second drive motor 47 is connected to the threaded rod 49 to drive the threaded rod 49 to rotate, thereby driving the fan-shaped nozzle 46 to move along the axis of the threaded rod 49.

[0078] A chute is provided on the storage box 41 , and a slider is provided on the fan-shaped nozzle 46 , which is slidably arranged in the chute.

[0079] like Figure 8-9 As shown, a plurality of screening chambers 37 are respectively provided with a fixing ring 310, the fixing ring 310 is fixedly connected to the grading cylinder 31, and a plurality of vibration mechanisms arranged at intervals are provided in the fixing ring 310, and the vibration mechanisms are suitable for generating vibrations on the corresponding screens 36;

[0080] The vibration mechanism includes a rotating rod 311, a first cam 312, and a first spring 314. The rotating rod 311 is rotatably mounted within the fixing ring 310. The first cam 312 is fixedly sleeved on the outer circumference of the rotating rod 311. The first spring 314 is sleeved on the outside of the rotating rod 311. One end of the first spring 314 is connected to the grading cylinder 31, and the other end of the first spring 314 is connected to the first cam 312.

[0081] A contact portion 313 is provided on the first cam 312, and the contact portion 313 contacts the corresponding screen 36. The screen 36 is suitable for generating a thrust on the contact portion 313 when being driven to rotate, thereby driving the first cam 312 to generate an angular offset. The first cam 312 is suitable for being reset by the first spring 314 after the angular offset to hit the corresponding screen 36 to generate vibration.

[0082] The working principle of this embodiment is as follows:

[0083] When in use, after the dust is put into the classification cylinder 31, the dust is screened by the classification cylinder 31. The screened dust is separated by particle size and stored separately in the corresponding storage box 41. Then the fan-shaped nozzle 46 is moved to the required storage box 41, and the air flow is introduced through the air inlet pipe 44 corresponding to the storage box 41 to spray the dust with uniform particle size screened in the storage box 41 into the simulation chamber 1 through the fan-shaped nozzle 46. According to actual needs, the fan-shaped nozzle 46 can be moved to multiple storage boxes 41 and these storage boxes can be stored separately. The dust in the box 41 is ejected. Since the dust in each storage box 41 is of uniform particle size, the concentration of the dust is easier to control and adjust when it is ejected into the simulation chamber 1. A dust concentration detector 2 is provided in the simulation chamber 1. When the dust concentration is easily adjusted, the calibration of the dust concentration detector 2 is more accurate and convenient. The airflow is generated by a blower connected to the air inlet pipe 44. The blower is not shown in the figure. The structure and working principle of the blower are all existing technologies and will not be described in detail here.

[0084] When the dust is put into the grading cylinder 31, it will enter the centrifugal cylinder 32. At this time, the first driving motor 33 is started to drive the first driving gear 34 to rotate. The engagement of the first driving gear 34 and the first driven gear 35 realizes the rotation of the centrifugal cylinder 32, thereby generating centrifugal force on the dust in the centrifugal cylinder 32, and then prompting the dust to pass through the screen 36. With the centrifugal cylinder 32 as the center, the sieve holes of each annular screen 36 gradually become smaller from the inside to the outside. When the dust passes through the screen 36, it determines how many layers of screen 36 it passes through according to its own particle size. When it cannot pass through the subsequent screen 36, it will fall into the corresponding conical storage box 38 in the screening cavity 37 at the screen 36, and enter the designated storage box 41 through the corresponding conveying pipe 39 for storage. Under this setting, the same batch of dust can be divided into multiple parts according to particle size. The more dust passes through the screens 36, the smaller its particles are, that is, the dust particles passing through the outermost screen 36 are the smallest, and the storage box 41 corresponding to the outermost screening chamber 37 is located at the bottom. The final effect is that the dust particles stored in the storage box 41 at the bottom are the smallest, and the higher the number of layers of the storage box 41, the larger the dust particles stored therein. When the dust is subsequently blown out by the airflow, the small dust particles at the bottom are suspended for a longer time, and the large dust particles at the top are suspended for a shorter time, thereby avoiding the phenomenon of obvious stratification of large and small dust particles caused by rapid sedimentation of large particles, which makes the calibration of the dust concentration detector 2 inaccurate. At the same time, small dust particles can continue to be sprayed after the large particles are sprayed. During the sedimentation process, the large particles are entrained by the airflow of the small particles sprayed subsequently, thereby slowing down the sedimentation speed.

[0085] The movement of the fan-shaped nozzle 46 adopts an electronic control method. When the fan-shaped nozzle 46 needs to move, the second drive motor 47 is started to drive the threaded rod 49 to rotate, thereby driving the fan-shaped nozzle 46 assembled on the threaded rod 49 to move along the axial direction of the threaded rod 49. The movement direction of the fan-shaped nozzle 46 is changed by the forward and reverse rotation of the threaded rod 49. The threaded rod 49 and the fan-shaped nozzle 46 can be assembled through a ball nut. The specific working principle of the threaded rod 49 to achieve linear movement with the assembled parts by rotation is the existing technology and will not be described in detail here. In order to prevent the fan-shaped nozzle 46 from rotating under the drive of the threaded rod 49, a slider is provided on the fan-shaped nozzle 46. When the fan-shaped nozzle 46 moves, the slider will move in the slide groove of the storage box 41, while also improving the stability of the movement.

[0086] In order to prevent each screen 36 from being blocked during the dust screening process, a fixing ring 310 is provided in the screening cavity 37 formed by each screen 36. A plurality of vibration mechanisms are provided at intervals in the fixing ring 310. The vibration mechanisms can vibrate the corresponding screen 36 to prevent the screen 36 from being blocked. It should be noted that the fixing ring 310 is fixedly provided in the classifying cylinder 31 and does not rotate with the centrifugal cylinder 32 and the screen 36.

[0087] The working principle of the vibration mechanism is that when the screen 36 is in a rotating state following the centrifugal cylinder 32, the edge of the screen 36 or the part protruding relative to the screen hole periodically contacts the contact part 313 of the first cam 312, and a tangential thrust is applied to the contact part 313. The thrust forces the first cam 312 to produce an angular offset, driving the rotating rod 311 to deviate synchronously, and twisting the first spring 314 in the process. When the screen 36 continues to rotate until it disengages from the contact part 313, the first spring 314 releases energy and resets, and at the same time drives the first cam 312 and the rotating rod 311 to reset together, that is, reverse rotation. During the reset process, the first cam 312 generates an instantaneous impact force on the surface of the screen 36, causing the screen 36 to vibrate at a high frequency to prevent the screen 36 from being blocked.

[0088] Example 2: Figure 10-13 As shown, this embodiment further includes the following structure on the basis of the first embodiment: a feeding port 43 and a discharging port 45 are provided on the storage box 41, the feeding port 43 is suitable for passing dust into the storage box 41, an outer roller 415 is fixedly provided at the discharging port 45, and an inner roller 414 is rotatably installed at the discharging port 45, the inner roller 414 is located inside the outer roller 415, and both the inner roller 414 and the outer roller 415 are provided with a matching groove running through them;

[0089] The inner roller 414 is provided with a support rod 413, which passes through the outer roller 415 and the storage box 41 to the outside of the storage box 41. The part of the support rod 413 located outside the storage box 41 is sleeved with a second spring 420. One end of the second spring 420 is connected to the storage box 41, and the other end of the second spring 420 is connected to the support rod 413. The support rod 413 is connected to the connecting rod 412 through a one-way bearing. The connecting rod 412 is connected to the driving gear 411. A rack 410 is provided on the fan-shaped nozzle 46. The rack 410 is suitable for following the fan-shaped nozzle 46 to move from bottom to top toward the storage box 41, so that the rack 410 is engaged with the corresponding driving gear 411, thereby driving the driving gear 411, the connecting rod 412, the support rod 413 and the inner roller 414 to rotate, aligning the matching grooves of the outer roller 415 and the inner roller 414 to open the discharge port 45;

[0090] A rotating shaft 422 is rotatably mounted on the storage box 41. A switch plate 423 corresponding to the feed port 43 is fixedly sleeved on the rotating shaft 422. A synchronous belt 421 is sleeved between the rotating shaft 422 and the support rod 413 via a synchronous wheel. When the inner roller 414 is driven to an angle offset to open the discharge port 45, the rotating shaft 422 rotates along the support rod 413 via the synchronous belt 421 to the switch plate 423 to close the corresponding feed port 43.

[0091] When the rack 410 is disengaged from the driving gear 411, the support rod 413 is reset by the second spring 420, thereby driving the inner roller 414 to reset to close the discharge port 45, and driving the switch plate 423 to reset to open the feed port 43;

[0092] When the rack 410 moves from top to bottom following the fan-shaped nozzle 46 , it engages with the driving gear 411 and cannot drive the support rod 413 to rotate.

[0093] like Figure 13 As shown, the connecting rod 412 is hollow, and an extension rod is connected to the support rod 413. The extension rod passes through the one-way shaft and the inside of the connecting rod 412 to the outside of the connecting rod 412. The protruding part of the extension rod is connected to a first installation box 416, and an infrared receiver 418 is installed on the first installation box 416. A controller is provided in the first installation box 416. A second installation box 417 is provided on the storage box 41, and an infrared transmitter 419 is installed on the second installation box 417. The infrared receiver 418 is connected to the controller, and the controller is connected to an external blower. The first installation box 416 is suitable for rotating with the inner roller 414. When the inner roller 414 is driven to rotate to open the discharge port 45, the infrared receiver 418 is aligned with the infrared transmitter 419. The infrared receiver 418 is suitable for feeding back the received signal to the controller, and the controller is suitable for starting the blower after receiving the signal.

[0094] like Figure 12 As shown, an inclined plate 424 is movably provided in the storage box 41. The upper end of the inclined plate 424 is located at the feed port 43, and the lower end of the inclined plate 424 is located at the discharge port 45. A plurality of third springs 425 are spaced apart on both sides of the inclined plate 424. The two ends of the third spring 425 are respectively connected to the inclined plate 424 and the storage box 41.

[0095] A rotating rod 426 is connected to the bottom of the centrifugal cylinder 32. The rotating rod 426 passes through the grading cylinder 31 and all the storage boxes 41. A plurality of second cams 427 corresponding to the storage boxes 41 are fixedly sleeved on the rotating rod 426. A matching block 428 is provided at the high end of the inclined placement plate 424. The second cam 427 is adapted to be driven to rotate and intermittently squeeze the matching block 428, thereby driving the corresponding inclined placement plate 424 to vibrate.

[0096] A baffle 429 is provided in the storage box 41, and the baffle 429 is adjacent to the discharge port 45. A guide portion 430 is provided on the baffle 429, and the guide portion 430 is in contact with the matching groove of the outer roller 415. A straight groove is opened on the baffle 429 and passes through itself. The straight groove is suitable for guiding dust to the guide portion 430, and then allowing the dust to enter the matching groove of the outer roller 415.

[0097] The working principle of this embodiment is as follows:

[0098] When in use, the fan-shaped nozzle 46 only docks with one storage box 41 at a time and sprays out the dust inside it, and the other storage boxes 41 are idle. In order to prevent the dust in the idle storage box 41 from leaking, and to ensure that the discharge port 45 can be opened in time when the storage box 41 is docked with the fan-shaped nozzle 46, an outer roller 415 is fixedly provided at the discharge port 45, and a rotatable inner roller 414 is provided inside the outer roller 415. The outer roller 415 and the inner roller 414 are both provided with matching grooves running through themselves, and the alignment state of the two matching grooves is changed by rotating the inner roller 414, thereby changing the on / off state of the discharge port 45.

[0099] When the fan-shaped nozzle 46 is driven to move from bottom to top toward the designated storage box 41, the rack 410 on the fan-shaped nozzle 46 engages with the driving gear 411 on the storage box 41, thereby driving the driving gear 411 to rotate, and the driving gear 411 then drives the connecting rod 412 and the support rod 413 to rotate synchronously. The support rod 413 is connected to the inner roller 414, so it can drive the inner roller 414 to rotate. After the inner roller 414 rotates, it aligns the originally staggered matching grooves and opens the feed port 43. When the fan-shaped nozzle 46 is completely docked with the storage box 41, When the discharge port 45 is fully opened, the dust in the storage box 41 can be ejected in conjunction with the blower. During this process, the second spring 420 outside the support rod 413 is twisted. When the fan-shaped nozzle 46 continues to move upward and docks with other storage boxes 41, the rack 410 is disconnected from the previous drive gear 411. The support rod 413, which has lost the support of the meshing force of the rack 410, is reset by the second spring 420, and at the same time drives the inner roller 414 to reset. The reset of the inner roller 414 causes the matching grooves to stagger again, thereby closing the feed port 43.

[0100] The fan-shaped nozzle 46 moves from the storage box 41 at the bottom to the top, and after docking with the storage box 41 at each layer, that is, all dust particles of all sizes are evenly sprayed once, the dust in the simulation chamber 1 is in a relatively evenly distributed state. When it is necessary to further increase the dust concentration in the simulation chamber 1, the fan-shaped nozzle 46 moves in the reverse direction. When the fan-shaped nozzle 46 moves in the reverse direction, the rack 410 of the fan-shaped nozzle 46 will mesh with the driving gear 411 again and drive the driving gear 411 to rotate, but due to the one-way bearing between the support rod 413 and the connecting rod 412 The setting only allows the rack 410 to transmit torque when it moves upward. When the rack 410 meshes with the driving gear 411 from top to bottom and drives the driving gear 411 to rotate, it does not drive the support rod 413 to rotate, and therefore the discharge port 45 will not be opened. This setting prevents the fan-shaped nozzle 46 from accidentally spraying out the dust of each layer again when it moves in the opposite direction, resulting in uncontrollable dust concentration. When the fan-shaped nozzle 46 moves in the opposite direction to the bottom of the storage box 41 that needs to be opened again, it moves upward again. The method of moving upward to open the storage box 41 is consistent with the above principle. Setting the lower fan-shaped nozzle 46 can realize repeated opening and spraying of a single layer, and can also move in the reverse direction to the specified layer and then continue to move upward to open and spray all the storage boxes 41 of the specified layer and above again. This setting can flexibly open the storage boxes 41 of each layer to meet the needs of adjusting the dust concentration. However, it should be noted that when the fan-shaped nozzle 46 moves from top to bottom, any layer of storage box 41 can be selected to open, without following the order of layer by layer. However, when it moves from bottom to top, the storage box 41 connected to it will be opened layer by layer. The specific usage method can be adjusted according to the actual concentration needs. Adaptive adjustment operation: the meshing and disengagement of the rack 410 with the corresponding drive gear 411 of a single layer are completed within the range of the layer, without affecting the drive gears 411 of other layers. That is, when the rack 410 is engaged with the drive gear 411 of a certain layer from bottom to top and then continuously moves to disengage the drive gear 411, when it is completely disengaged, there is still a distance between the rack 410 and the drive gear 411 of the adjacent layer, and further movement is required to achieve meshing of the rack 410 with the drive gear 411 of the adjacent layer.

[0101] In order to prevent the discharge port 45 of the storage box 41 from partially flowing back into the interior of the conveying pipe 39 during the process of opening the ventilation to spray out the dust, thereby affecting the dust in the screening chamber 37, the support rod 413 is driven to rotate to open the discharge port 45. The synchronous belt 421 drives the rotating shaft 422 to rotate, and the rotating shaft 422 drives the switch plate 423 to rotate under the rotation. After the rotation, the switch plate 423 closes the corresponding feed port 43 to prevent the air flow from flowing back into the conveying pipe 39 through the feed port 43. When the support rod 413 is reset by the second spring 420 to automatically close the feed port 43, the switch plate 423 is also reset. At this time, the feed port 43 is opened again, and the storage box 41 that has just been emptied is filled with dust.

[0102] In order to improve the degree of automation of the blower startup, an extension rod is added to the support rod 413. The extension rod passes through the one-way bearing and the hollow part of the connecting rod 412 and is connected to the first installation box 416. An infrared receiver 418 is provided on the first installation box 416. Electrical components such as a power supply of a controller and the infrared receiver 418 are provided inside the first installation box 416. A second installation box 417 is provided on the storage box 41. An infrared transmitter 419 is provided on the second installation box 417. Electrical components such as a power supply of the infrared transmitter 419 are provided in the second installation box 417. When the support rod 413 is driven to rotate to open the discharge port 45, the extension rod and the first installation box 416 are driven to rotate to The infrared receiver 418 is aligned with the infrared transmitter 419. At this time, the infrared receiver 418 receives the signal and feeds it back to the controller. After receiving the signal, the controller starts the blower. Driven by the second spring 420, the support rod 413 is reset. When the discharge port 45 is closed, the first installation box 416 is also reset. The infrared receiver 418 cannot receive the signal from the infrared transmitter 419, so the controller controls the blower to shut down. The whole process is that the discharge port 45 is opened and the feed port 43 is closed, and the blower starts to work. After the discharge port 45 is opened, dust is replenished in the storage box 41, and the discharge port 45 is closed. At the same time, the blower stops working. The whole process is automated control, which improves and reduces manual operation.

[0103] In order to prevent the dust from being unevenly distributed and accumulating when entering the storage box 41 through the conveying pipe 39 and the feed port 43, thereby generating agglomerates and affecting the subsequent dust removal work, a movable inclined placement plate 424 is provided in the storage box 41. After passing through the feed port 43, the dust falls to the high point of the inclined placement plate 424 and flows toward the low point along the inclination angle of the inclined placement plate 424 to avoid accumulation at the feed port 43. At the same time, a rotating rod 426 extends from the centrifugal cylinder 32 and extends into the storage box 41 to drive the second cam 427 to rotate. The second cam 427 rotates During the movement, the matching block 428 is intermittently squeezed. After being squeezed, the matching block 428 drives the tilted plate 424 to vibrate as a whole. The tilted plate 424 squeezes the third spring 425 during the vibration process. When the second cam 427 is no longer in contact with the matching block 428, the third spring 425 drives the tilted plate 424 to reset. The whole process is repeated to achieve the overall vibration of the tilted plate 424. The vibration of the tilted plate 424 can accelerate the flow of dust to the lower point on the tilted plate 424, and further avoid the problem of dust agglomeration.

[0104] A baffle 429 is provided in the storage box 41, and a straight groove is opened on the baffle 429. The height of the straight groove is less than the height of the internal space of the storage box 41. When the blower blows the dust out, the dust will not all flow into the discharge port 45 due to the restriction of the straight groove, but will pass through the straight groove in layers. The dust at the bottom will first pass through the straight groove, and then enter the discharge port 45 along the guide part 430 after passing through the straight groove. This setting avoids the discharge of too much dust at one time, resulting in uncontrollable uniformity.

[0105] Example 3: Figure 14-15 As shown, this embodiment further includes the following structure on the basis of the first embodiment: the internal space of the fan-shaped nozzle 46 includes a high-speed area 51, two medium-speed areas 52 and two low-speed areas 53. A spoiler 54 is fixedly provided at the high-speed area 51. The spoiler 54 is hollow and has a diverter groove 55 running through it. The diverter groove 55 is suitable for diverting part of the dust and airflow passing through the high-speed area 51 into the medium-speed area 52. The diverter groove 55 is provided with an arc-shaped diverter portion 56.

[0106] An adjustment plate 57 is provided between the adjacent medium-speed region 52 and the low-speed region 53. A docking rod 59 is provided on one end of the adjustment plate 57 close to the storage box 41. The other end of the adjustment plate 57 is a swing end. The docking rod 59 is rotatably mounted on the fan-shaped nozzle 46. The adjustment plate 57 is provided with a swing adjustment mechanism. The swing adjustment mechanism is suitable for driving the swing end of the adjustment plate 57 to produce an angular deviation, thereby changing the flow rate of the dust and airflow passing through the low-speed region 53.

[0107] A plurality of wind-powered impellers 518 arranged at intervals are rotatably mounted at the outlet of the fan-shaped nozzle 46 . The wind-powered impellers 518 are suitable for pulling part of the airflow and dust passing through the fan-shaped nozzle 46 upward.

[0108] like Figure 14 As shown, the swing adjustment mechanism is a balance block 58, which is connected to the swing end of the adjustment plate 57. The airflow passing through the medium-speed area 52 and the low-speed area 53 is suitable for contacting the balance block 58, thereby driving the adjustment plate 57 to swing to balance the flow rate of the airflow passing through the medium-speed area 52 and the low-speed area 53.

[0109] like Figure 15As shown, the swing adjustment mechanism includes a third drive motor 512, a second driving gear 513 and a second driven gear 514. The third drive motor 512 is mounted on the fan-shaped nozzle 46. The second driving gear 513 and the second driven gear 514 are both rotatably mounted on the fan-shaped nozzle 46. The second driving gear 513 is meshed with the second driven gear 514. The third drive motor 512 is connected to the second driving gear 513 to drive the second driving gear 513 and the second driven gear 514 to rotate in opposite directions. A spacer is provided on the second driving gear 513, and a first toggle plate 516 is provided on the spacer. The second driven gear 514 is provided with a second toggle plate 515. When the second driving gear 513 and the second driven gear 514 rotate in opposite directions, the first toggle plate 516 and the second toggle plate 515 do not contact each other.

[0110] Both docking rods 59 pass through the fan-shaped nozzle 46 and extend to the outside of the fan-shaped nozzle 46. A fourth spring 511 is sleeved on the extended part of the docking rod 59. The two ends of the fourth spring 511 are respectively connected to the docking rod 59 and the fan-shaped nozzle 46. A first force plate 517 is fixedly sleeved on the docking rod 59 adjacent to the second driving gear 513, and a second force plate 510 is fixedly sleeved on the docking rod 59 adjacent to the second driven gear 514. The first toggle plate 516 is suitable for being driven to rotate and thereby squeeze the first force plate 517, thereby forcing the adjustment plate 57 corresponding to the first force plate 517 to deviate toward the adjacent low-speed area 53. The second toggle plate 515 is suitable for being driven to rotate and thereby squeeze the second force plate 510, thereby forcing the adjustment plate 57 corresponding to the second force plate 510 to deviate toward the adjacent low-speed area 53.

[0111] The working principle of this embodiment is as follows:

[0112] When the dust enters the fan-shaped nozzle 46 through the discharge port 45 and is discharged into the simulation chamber 1, the setting of the fan-shaped nozzle 46 expands the discharge range of the dust and makes the distribution more uniform, and divides the internal space of the fan-shaped nozzle 46 into a high-speed area 51, a medium-speed area 52 and a low-speed area 53. A hollow spoiler 54 is provided in the high-speed area 51. When the airflow and dust are discharged through the spoiler 54, part of the airflow and dust will enter the medium-speed area 52 along the diversion groove 55 to achieve a diversion effect, thereby avoiding excessively high flow velocity in the high-speed area 51. In order to further improve the diversion effect, an arc-shaped diversion portion 56 is further provided in the diversion groove 55. When the airflow and dust pass through the spoiler 54, part of them come into contact with the arc-shaped diversion portion 56 and are guided into the medium-speed area 52 along the outer contour of the arc-shaped diversion portion 56. Under this setting, the problem that the flow velocity in the high-speed area 51 is significantly higher than that in the medium-speed area 52 is improved.

[0113] A swingable adjustment plate 57 is provided between the medium-speed region 52 and the low-speed region 53. The end of the adjustment plate 57 close to the storage box 41 is the swing origin. This end is rotatably mounted on the fan-shaped nozzle 46 via a docking rod 59. The other end is the swing end. By swinging the swing end, the cross-sectional size of the channel in the medium-speed region 52 and the low-speed region 53 is changed to achieve the problem of balancing the gas flow rate in the medium-speed region 52 and the low-speed region 53. The smaller the channel cross-section, the faster the flow rate, and vice versa.

[0114] In this embodiment, a balancing block 58 is provided at the swinging end of the regulating plate 57. The balancing block 58 automatically compensates for flow velocity differences through passive adjustment. The balancing block 58 is affected by the impact of the airflow in both the medium-speed region 52 and the low-speed region 53. When the flow velocity in a certain region is too high, the thrust of the airflow in that region on the balancing block 58 increases, forcing the regulating plate 57 to swing in the opposite direction, thereby achieving the effect of automatically compensating for the flow velocity difference.

[0115] In another embodiment, an active swing method is adopted to change the flow rate in the low-speed area 53. The third driving motor 512 is started to drive the second driving gear 513 to rotate. The second driving gear 513 is meshed with the second driven gear 514, thereby realizing the rotation of the second driven gear 514. The second driving gear 513 and the second driven gear 514 rotate in opposite directions due to the meshing relationship. The docking rod 59 that provides the adjustment plate 57 with the ability to rotate the origin extends out of the fan-shaped nozzle 46. The extended part and the fan-shaped nozzle 46 are commonly connected with a fourth spring 511. The fourth spring 511 When the adjustment plate 57 is in the initial state, it is located at the center of the low-speed area 53 and the medium-speed area 52. The first force-bearing plate 517 is connected to the docking rod 59 corresponding to the second driving gear 513, and the second force-bearing plate 510 is connected to the docking rod 59 corresponding to the second driven gear 514. The second driving gear 513 rotates and drives the first toggle plate 516 connected thereto to squeeze the first force-bearing plate 517. The squeezed first force-bearing plate 517 drives the corresponding docking rod 59 to rotate. At this time, the adjustment plate 57 corresponding to the docking rod 59 deviates to the low-speed area 53. The channel cross-section of area 53 is reduced and the flow rate is increased, while the channel of medium-speed area 52 releases more space due to the offset of the adjustment plate 57, the cross-section is relatively increased, and the flow rate is correspondingly reduced, so as to balance the flow rate between the low-speed area 53 and the medium-speed area 52. This part needs to control the rotation direction of the main shaft of the third drive motor 512 to make the second driving gear 513 and the second driven gear 514 rotate to control the first toggle plate 516 to contact the side of the first force plate 517 close to the second force plate 510 under rotation, and at the same time control the second toggle plate 515 to contact the second force plate 517 under rotation. The side of the force-bearing plate 510 close to the first force-bearing plate 517 is in contact with the second force-bearing plate 510. The cooperation principle between the second force-bearing plate 510 and the second toggle plate 515 is the same as the cooperation principle between the first force-bearing plate 517 and the first toggle plate 516. The difference is that the first toggle plate 516 and the second driving gear 513 are connected by a spacer, while the second toggle plate 515 is connected to the second driven gear 514. This arrangement prevents the first toggle plate 516 and the second toggle plate 515 from contacting each other during the simultaneous rotation of the second driving gear 513 and the second driven gear 514, thereby preventing interference.

[0116] In order to increase the speed of slowing down the settling of dust of all particle sizes after being ejected, a plurality of wind-driven impellers 518 are provided at the outlet of the fan-shaped nozzle 46. The wind-driven impellers 518 are driven to rotate by airflow, thereby pulling part of the dust upward, prolonging the suspension time, and more realistically simulating the dust diffusion scene in an open space.

[0117] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust environment simulation device, characterized in that: include: A simulation chamber (1), wherein a dust concentration detector (2) is installed in the simulation chamber (1); A grading component (3), the grading component (3) being installed outside the simulation chamber (1), and the grading component (3) being suitable for screening dust according to particle size; A storage assembly (4), the storage assembly (4) being located in the simulation chamber (1), the storage assembly (4) comprising a plurality of storage boxes (41), the plurality of storage boxes (41) being suitable for storing dust of different particle sizes after screening, the classification assembly (3) being connected to the storage boxes (41) so as to be suitable for inputting the classified dust into the storage boxes (41), the storage boxes (41) being provided with an air intake pipe (44), the air intake pipe (44) being suitable for being connected to an external blower; a fan-shaped nozzle (46), the fan-shaped nozzle (46) docking with a separate storage box (41) to be suitable for spraying the dust in the corresponding storage box (41) into the simulation chamber (1); a moving mechanism connected to the fan-shaped nozzle (46) to drive the fan-shaped nozzle (46) to dock with any of the storage boxes (41), thereby cooperating with the blower to spray dust of a specified particle size, thereby adjusting the dust concentration in the simulation chamber (1); The plurality of storage boxes (41) are vertically distributed, and the dust particles stored in the storage box (41) at the bottom are the smallest. The higher the number of layers of the storage box (41), the larger the dust particles stored therein, so that the dust particles discharged by the fan-shaped nozzle (46) are small at the bottom and large at the top.

2. The dust environment simulation device according to claim 1, characterized in that: The grading component (3) comprises: A coaxially arranged classification cylinder (31) and a centrifugal cylinder (32), wherein the classification cylinder (31) is mounted on the simulation chamber (1), and the centrifugal cylinder (32) is rotatably mounted inside the classification cylinder (31); a rotary drive mechanism, the rotary drive mechanism being mounted on the classifying cylinder (31), the rotary drive mechanism being connected to the centrifugal cylinder (32) so as to be suitable for driving the centrifugal cylinder (32) to rotate; a plurality of annular screens (36) arranged at intervals in the centrifugal cylinder (32), wherein the plurality of screens (36) divide the internal space of the grading cylinder (31) into a plurality of concentric annular screening chambers (37); a plurality of conical receiving boxes (38) corresponding to the screening cavities (37), the conical receiving boxes (38) being connected to the bottom of the grading cylinder (31), the grading cylinder (31) being provided with through slots corresponding to the screening cavities (37) and penetrating the grading cylinder (31), the through slots being in communication with the corresponding screening cavities (37) and the internal spaces of the conical receiving boxes (38); The mesh sizes of the plurality of screens (36) gradually decrease outwards from the center of the centrifugal cylinder (32), and the centrifugal cylinder (32) is adapted to be driven to rotate so as to drive dust to pass through the corresponding screens (36) according to particle size and then enter the corresponding conical storage box (38); The conical receiving boxes (38) are arranged radially from outside to inside, and the storage boxes (41) are arranged in layers from bottom to top in the vertical direction. The outermost conical receiving boxes (38) correspond to the storage boxes (41) at the bottom, and adjacent conical receiving boxes (38) correspond to adjacent storage boxes (41). A delivery pipe (39) is provided between the conical receiving boxes (38) and the corresponding storage boxes (41).

3. The dust environment simulation device according to claim 2, characterized in that: The rotary drive mechanism comprises a first drive motor (33), a first driving gear (34) and a first driven gear (35), wherein the first drive motor (33) is mounted on the classification cylinder (31), the first driven gear (35) is fixedly sleeved on the centrifugal cylinder (32), the first driving gear (34) is rotatably mounted on the classification cylinder (31), the first driven gear (35) is meshed with the first driving gear (34), and the first drive motor (33) is connected to the first driving gear (34) to drive the first driving gear (34) to rotate; The moving mechanism includes a second driving motor (47), a bracket (48) and a threaded rod (49), wherein the bracket (48) is connected to the storage box (41), the second driving motor (47) is mounted on the bracket (48), the threaded rod (49) is rotatably mounted on the bracket (48), the fan-shaped nozzle (46) is assembled outside the threaded rod (49), and the second driving motor (47) is connected to the threaded rod (49) to drive the threaded rod (49) to rotate, thereby driving the fan-shaped nozzle (46) to move along the axial direction of the threaded rod (49); The storage box (41) is provided with a chute, and the fan-shaped nozzle (46) is provided with a slider, which is slidably arranged in the chute.

4. The dust environment simulation device according to claim 2, characterized in that: A plurality of the screening cavities (37) are respectively provided with a fixing ring (310), the fixing ring (310) being fixedly connected to the grading cylinder (31), and a plurality of vibration mechanisms arranged at intervals are provided in the fixing ring (310), the vibration mechanisms being suitable for generating vibrations on the corresponding screens (36); The vibration mechanism includes a rotating rod (311), a first cam (312), and a first spring (314); the rotating rod (311) is rotatably mounted in the fixing ring (310); the first cam (312) is fixedly sleeved on the outer peripheral surface of the rotating rod (311); the first spring (314) is sleeved on the outside of the rotating rod (311); one end of the first spring (314) is connected to the grading cylinder (31); and the other end of the first spring (314) is connected to the first cam (312); A contact portion (313) is provided on the first cam (312), and the contact portion (313) contacts the corresponding screen (36). The screen (36) is adapted to generate a thrust on the contact portion (313) when driven to rotate, thereby driving the first cam (312) to generate an angular offset. The first cam (312) is adapted to be reset by the first spring (314) after the angular offset to impact the corresponding screen (36) to generate vibration.

5. The dust environment simulation device according to claim 2, characterized in that: The storage box (41) is provided with a feed port (43) and a discharge port (45), the feed port (43) is suitable for passing dust into the storage box (41), an outer roller (415) is fixedly provided at the discharge port (45), an inner roller (414) is rotatably installed at the discharge port (45), the inner roller (414) is located inside the outer roller (415), and both the inner roller (414) and the outer roller (415) are provided with a matching groove penetrating therethrough; A support rod (413) is provided on the inner roller (414), and the support rod (413) passes through the outer roller (415) and the storage box (41) to the outside of the storage box (41). A second spring (420) is sleeved on the portion of the support rod (413) located outside the storage box (41), one end of the second spring (420) is connected to the storage box (41), and the other end of the second spring (420) is connected to the support rod (413). The support rod (413) is connected to a connecting rod (412) via a one-way bearing. The connecting rod (412) 12) is connected to a driving gear (411), and a rack (410) is provided on the fan-shaped nozzle (46), and the rack (410) is suitable for following the fan-shaped nozzle (46) to move from bottom to top toward the storage box (41), so that the rack (410) is engaged with the corresponding driving gear (411), thereby driving the driving gear (411), the connecting rod (412), the supporting rod (413) and the inner roller (414) to rotate, and aligning the matching grooves of the outer roller (415) and the inner roller (414) to open the discharge port (45); A rotating shaft (422) is rotatably mounted on the storage box (41), a switch plate (423) corresponding to the feed port (43) is fixedly sleeved on the rotating shaft (422), a synchronous belt (421) is sleeved between the rotating shaft (422) and the support rod (413) via a synchronous wheel, and when the inner roller (414) is driven to shift the angle to open the discharge port (45), the rotating shaft (422) follows the support rod (413) through the synchronous belt (421) and rotates to the switch plate (423) to close the corresponding feed port (43); When the rack (410) is disengaged from the driving gear (411), the support rod (413) is reset by the second spring (420), thereby driving the inner roller (414) to reset to close the discharge port (45), and driving the switch plate (423) to reset to open the feed port (43); When the rack (410) moves from top to bottom following the fan-shaped nozzle (46) and engages with the driving gear (411), it cannot drive the support rod (413) to rotate.

6. The dust environment simulation device according to claim 5, characterized in that: The connecting rod (412) is hollow, and an extension rod is connected to the support rod (413). The extension rod passes through the one-way shaft and the interior of the connecting rod (412) to the outside of the connecting rod (412). A first installation box (416) is connected to the protruding portion of the extension rod, and an infrared receiver (418) is installed on the first installation box (416). A controller is installed in the first installation box (416). A second installation box (417) is installed on the storage box (41). There is an infrared transmitter (419), the infrared receiver (418) is connected to the controller, the controller is connected to an external blower, the first installation box (416) is suitable for following the rotation of the inner roller (414), when the inner roller (414) is driven to rotate to open the discharge port (45), the infrared receiver (418) is aligned with the infrared transmitter (419), the infrared receiver (418) is suitable for feeding back the received signal to the controller, and the controller is suitable for starting the blower after receiving the signal.

7. The dust environment simulation device according to claim 5 or 6, characterized in that: An inclined plate (424) is movably provided in the storage box (41), the upper end of the inclined plate (424) is located at the feed port (43), and the lower end of the inclined plate (424) is located at the discharge port (45). A plurality of third springs (425) are spaced apart on both sides of the inclined plate (424), and the two ends of the third springs (425) are respectively connected to the inclined plate (424) and the storage box (41); The bottom of the centrifugal cylinder (32) is connected to a rotating rod (426), the rotating rod (426) passes through the grading cylinder (31) and all the storage boxes (41), a plurality of second cams (427) corresponding to the storage boxes (41) are fixedly sleeved on the rotating rod (426), and a matching block (428) is provided at the high end of the inclined placement plate (424), and the second cam (427) is suitable for being driven to rotate and intermittently squeeze the matching block (428) to drive the corresponding inclined placement plate (424) to vibrate; A baffle (429) is provided in the storage box (41), and the baffle (429) is adjacent to the discharge port (45). A guide portion (430) is provided on the baffle (429), and the guide portion (430) is in contact with the matching groove of the outer roller (415). A straight groove is provided on the baffle (429) that runs through the baffle, and the straight groove is suitable for guiding dust to the guide portion (430), thereby allowing the dust to enter the matching groove of the outer roller (415).

8. The dust environment simulation device according to claim 2 or 6, characterized in that: The internal space of the fan-shaped nozzle (46) includes a high-speed area (51), two medium-speed areas (52) and two low-speed areas (53), a spoiler (54) is fixedly provided at the high-speed area (51), the spoiler (54) is hollow, and a diversion groove (55) is provided on the spoiler (54) running through the spoiler, the diversion groove (55) is suitable for diverting part of the dust and airflow passing through the high-speed area (51) into the medium-speed area (52), and an arc-shaped diversion portion (56) is provided on the diversion groove (55); An adjusting plate (57) is provided between the adjacent medium-speed region (52) and the low-speed region (53); a docking rod (59) is provided on one end of the adjusting plate (57) close to the storage box (41); the other end of the adjusting plate (57) is a swing end; the docking rod (59) is rotatably mounted on the fan-shaped nozzle (46); a swing adjusting mechanism is provided on the adjusting plate (57); the swing adjusting mechanism is suitable for driving the swing end of the adjusting plate (57) to produce an angular deviation, thereby changing the flow rate of the dust and airflow passing through the low-speed region (53); A plurality of wind-powered impellers (518) arranged at intervals are rotatably mounted at the outlet of the fan-shaped nozzle (46), and the wind-powered impellers (518) are suitable for pulling part of the airflow and dust passing through the fan-shaped nozzle (46) upward.

9. The dust environment simulation device according to claim 8, characterized in that: The swing adjustment mechanism is a balancing block (58), which is connected to the swing end of the adjustment plate (57). The airflow passing through the medium-speed area (52) and the low-speed area (53) is suitable for contacting the balancing block (58), thereby driving the adjustment plate (57) to swing to balance the flow rate of the airflow passing through the medium-speed area (52) and the low-speed area (53).

10. The dust environment simulation device according to claim 8, characterized in that: The swing adjustment mechanism includes a third drive motor (512), a second driving gear (513) and a second driven gear (514), wherein the third drive motor (512) is mounted on the fan-shaped nozzle (46), the second driving gear (513) and the second driven gear (514) are both rotatably mounted on the fan-shaped nozzle (46), the second driving gear (513) is meshed with the second driven gear (514), and the third drive motor (512) is connected to the second driving gear (513) to drive the second driving gear (513) and the second driven gear (514) to rotate in opposite directions, a pad is provided on the second driving gear (513), a first toggle plate (516) is provided on the pad, and a second toggle plate (515) is provided on the second driven gear (514), and when the second driving gear (513) and the second driven gear (514) rotate in opposite directions, the first toggle plate (516) and the second toggle plate (515) do not contact each other; The two docking rods (59) both pass through the fan-shaped nozzle (46) and extend to the outside of the fan-shaped nozzle (46). A fourth spring (511) is sleeved on the extended portion of the docking rod (59). The two ends of the fourth spring (511) are respectively connected to the docking rod (59) and the fan-shaped nozzle (46). The docking rod (59) adjacent to the second driving gear (513) is fixedly sleeved with a first force plate (517). The docking rod (59) adjacent to the second driven gear (514) is fixedly sleeved with a second force plate (517). The second force-bearing plate (510), the first shifting plate (516) is suitable for being driven to rotate and thereby causing compression on the first force-bearing plate (517), thereby forcing the adjustment plate (57) corresponding to the first force-bearing plate (517) to deviate toward the adjacent low-speed area (53), and the second shifting plate (515) is suitable for being driven to rotate and thereby causing compression on the second force-bearing plate (510), thereby forcing the adjustment plate (57) corresponding to the second force-bearing plate (510) to deviate toward the adjacent low-speed area (53).

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