A matrix type multi-particle size dust generator with adjustable humidity and spray speed

Abstract

The present invention discloses a matrix multi-particle size dust generator with adjustable humidity and spray speed in the technical field of mine electromechanical and mining safety related technology. The dust generator comprises a generator body, a dust making chamber and a matrix dust generator are arranged on the generator body, a dust proportioning chamber, a primary load-bearing plate, a wiring chamber, a heating chamber, a vibration chamber, a transmission chamber, and a secondary load-bearing plate are provided in the dust making chamber; a driving wheel, a transmission wheel, a swing wheel, a balance box, a main pulley and an anti-slip track are arranged in the transmission chamber. The actual use results of the present invention show that the mechanical structure design is reasonable, the electrical system layout is proper, the vibration frequency is high, the power is strong, the multi-particle size dust ratio is accurate, the mixing is uniform, the dust moisture content preparation precision is high, the uniformity is good, the matrix dust generator can realize point-line-surface spraying and the spray speed is adjustable, which can fully meet the scientific requirements of the dust transport simulation experiment for various experimental conditions, and is suitable for promotion and application.

Description

Technical Field

[0001] The invention relates to the technical field of mine electromechanical and mining safety, in particular to a matrix-type multi-particle-size dust generator with adjustable humidity and spray speed. Background Art

[0002] With the continuous increase in coal mine production, relying on the widespread use of automated coal mining machinery, the amount of dust in the coal mining face of coal mines has also increased accordingly. Coal mine dust is usually divided into coarse dust with a diameter greater than 40μm, fine dust with a diameter of 10-40μm, fine dust with a diameter of 0.25-10μm, and ultrafine dust with a diameter less than 0.25μm according to the particle size. When the dust diameter is less than 5μm, it is called respirable dust. A large amount of dust not only harms the health of the workers, but also causes pneumoconiosis when deposited in the lungs. In the production process of coal mine dust, coal mining machines, coal cutting, rack moving, coal breaking machines, transfer machines, and belt conveying will produce different degrees of dust, and will pollute the working face with the fresh air flow underground, affecting the working environment. At the same time, when the concentration of coal mine dust reaches certain conditions, it is also combustible and explosive, causing casualties and property losses. The safety hazards are huge, and the dust prevention and control problem is urgent.

[0003] In order to understand the migration and action mechanism of dust pollution in mines, it is necessary to conduct research and analysis with the help of relevant experiments. In this experimental process, in order to restore the real situation to the best effect of dust, reduce experimental errors, and make the results more accurate and reliable, it is necessary to design a dust generating device with reasonable structure, complete functions and intelligent operation, in order to achieve the real composition and dust generation mode of dust particles in mines. For this reason, we propose a matrix multi-particle size dust generator with adjustable humidity and spray speed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a matrix multi-particle size dust generator with adjustable humidity and spray speed to solve the problems raised in the above-mentioned background technology, so as to realize four major system functions of automatic proportioning of dust particle size, controllable dust moisture content, matrix structure point, line and surface spraying, and adjustable spray speed, as well as multi-dimensional and three-dimensional experimental effects, thereby improving the authenticity of dust production effects and the scientific nature of simulation experiments.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A matrix type multi-particle size dust generator with adjustable humidity and spray speed, the dust generator comprises a generator body, the generator body comprises a dust making chamber and a matrix type dust generator, a dust proportioning chamber is arranged in the dust making chamber, a first-level load-bearing plate is arranged below the dust proportioning chamber, a heating chamber is arranged below the first-level load-bearing plate, a wiring chamber is arranged on one side of the heating chamber, a second-level load-bearing plate is arranged on the other side of the heating chamber, a transmission chamber is arranged below the wiring chamber, and a vibration chamber is also arranged in the heating chamber.

[0007] Preferably, the dust-making chamber is provided with a box cover, a box door, a touch screen and a dust collection box;

[0008] The dust proportioning chamber is equipped with a No. 1 solenoid valve, a No. 2 solenoid valve, a No. 3 solenoid valve, a monomer box, a switch controller, a main controller and a water storage tank;

[0009] The wiring cavity is provided with a dust slide, a water pipeline, a vibration motor and a vibration controller;

[0010] The heating chamber is provided with a water mist motor, a water mist controller, a heating wire, a tension spring, a vibration reduction spring and a swing rubber pad;

[0011] The vibration cavity is provided with a dustproof cushion, a tight hoop and a No. 4 electromagnetic valve; the transmission cavity is provided with a driving wheel, a transmission wheel, a swing wheel, a bearing, a balance box, a main pulley, a sub-pulley and an anti-slip track;

[0012] The matrix dust generator is provided with a first dust generating motor, a second dust generating motor, a third dust generating motor, a fourth dust generating motor, a first dust generating controller, a second dust generating controller, a first-level particle nozzle, a second-level particle nozzle, a third-level particle nozzle and a point particle nozzle.

[0013] Preferably, the dust making chamber is designed in a cylindrical structure, and the top of the dust making chamber is rotatably connected to the box cover by a hinge. A connected box door is provided on one side of the dust making chamber, and the box door passes through the dust matching chamber and the wiring chamber. Handles are provided on the box door and the box cover. A touch screen is embedded on the other side of the dust making chamber and on the wall of the dust matching chamber, and the touch screen is electrically connected to the main controller.

[0014] Preferably, a main controller and a switch controller are installed on the first-level load-bearing plate, the core component inside the main controller adopts a DSP28335 control chip, and the core component inside the switch controller adopts an AT89C51 single-chip microcomputer.

[0015] Preferably, the inner bottom of the monomer box is respectively inlaid with a No. 1 solenoid valve, a No. 2 solenoid valve and a No. 3 solenoid valve, the control ports of the No. 1 solenoid valve, the No. 2 solenoid valve and the No. 3 solenoid valve are respectively electrically connected to the PWM port of the switch controller, and the bidirectional communication port of the switch controller is electrically connected to the bidirectional communication port of the main controller;

[0016] The bottom of the monomer box penetrates the first-level load-bearing plate and extends into the dust slide. The monomer box and the dust slide are both designed in an inverted funnel-shaped structure, and the bottom end of the dust slide extends into the vibration cavity;

[0017] The water storage tank is fixedly mounted on one side of the primary load-bearing plate, the center of the bottom end of the water storage tank is connected to the input end of the water mist motor through a water delivery pipe, the water mist motor is fixedly mounted on the heating cavity, the output end of the water mist motor is connected to the water mist nozzle, and the water mist nozzle extends into the vibration cavity;

[0018] The water mist motor adopts a micro stepping motor, which is electrically connected to the water mist controller through a second driving circuit. The two-way communication port of the water mist controller is electrically connected to the two-way communication port of the main controller. The core component in the water mist controller adopts an AT89C51 single-chip microcomputer.

[0019] Preferably, the heating cavity is designed in a cylindrical structure, and a heating wire is wound on the inner wall of the heating cavity, the heating wire is directly connected to the 220V AC power supply, the top of the inner side of the heating cavity is connected to the top of the vibration cavity through four tension springs, the right side of the inner side of the heating cavity is connected to one side of the vibration cavity through a vibration-damping spring, and the bottom of the inner side of the heating cavity is connected to the bottom of the vibration cavity through a swinging rubber pad.

[0020] Preferably, the vibration cavity is designed in an inverted funnel-shaped structure, a circle of dust-proof cushion is installed at the center of the top of the vibration cavity, the dust-proof cushion is tightly connected to the bottom of the dust slide, a No. 4 solenoid valve is inlaid at the bottom of the vibration cavity, the control port of the No. 4 solenoid valve is electrically connected to the PWM port of the switch controller, and a tightly fitted tight hoop is provided at the center of the outer side of the vibration cavity, and the side of the tight hoop is fixedly connected to one end of the balance box.

[0021] Preferably, the transmission cavity is fixedly nested in the secondary load-bearing plate, a vibration motor is installed above the transmission cavity, the vibration motor is electrically connected to the vibration controller through a driver, the bidirectional communication port of the vibration controller is electrically connected to the bidirectional communication port of the main controller, the core component in the vibration controller adopts a DSP28335 control chip, and the vibration motor adopts a brushless DC motor;

[0022] The output shaft of the vibration motor is fixedly connected to the center of the driving wheel, the bottom end of the output shaft is rotatably connected to the bottom surface of the transmission cavity through a bearing, the driving wheel is rotatably connected to the transmission wheel through teeth, the transmission wheel is fixedly mounted on the swing wheel and the two are not concentric, the transmission wheel and the swing wheel are rotatably connected to the upper and lower surfaces inside the transmission cavity through a connecting rod and a bearing, and the bearing is embedded in the transmission cavity;

[0023] The circumferential surface of the swing wheel is designed with a groove-shaped structure, the groove is rotatably connected to the main pulley, an anti-slip track is arranged around the swing wheel, the main pulley and the sub-pulley are respectively installed in the balance box, and the anti-slip track is rotatably connected to the sub-pulley.

[0024] Preferably, the power supply module of the main controller adopts a switching power supply, which can convert 220V AC power into two voltages of 3.3V and 5V, of which 3.3V is supplied to the DSP28335 control chip in the main controller and the vibration controller, and 5V is supplied to the AT89C51 microcontroller in the switch controller, water mist controller, dust generation controller one and dust generation controller two.

[0025] Preferably, the center of the bottom surface of the dust-making cavity is connected to the top of the dust collecting box, the dust collecting box is designed in a funnel-shaped structure, and four small holes are opened at the bottom of the dust collecting box, and the four small holes are respectively connected to the input ends of the first dust-generating motor, the second dust-generating motor, the third dust-generating motor and the fourth dust-generating motor;

[0026] The output end of the first dust generating motor is connected to three primary particle nozzles on one side of the matrix dust generator, and the three primary particle nozzles are installed in a straight line;

[0027] The output end of the second dust generating motor is connected to three secondary particle nozzles in the middle of the matrix dust generator, and the three secondary particle nozzles are installed in a straight line;

[0028] The output end of the No. 3 dust-generating motor is connected to two third-level particle nozzles on the other side of the matrix dust generator;

[0029] The output end of the fourth dust-generating motor is connected to the point-type particle nozzle, and the third-level particle nozzle and the point-type particle nozzle are installed on the same straight line;

[0030] The first-stage particle nozzle, the second-stage particle nozzle, the third-stage particle nozzle, and the point-type particle nozzle are not connected to each other;

[0031] The dust-generating motor No. 1, the dust-generating motor No. 2, the dust-generating motor No. 3 and the dust-generating motor No. 4 all adopt micro stepping motors; the dust-generating motor No. 1 and the dust-generating motor No. 2 are electrically connected to the PWM port of the dust-generating controller No. 1, respectively; the dust-generating motor No. 3 and the dust-generating motor No. 4 are electrically connected to the PWM port of the dust-generating controller No. 2, respectively; the dust-generating controller No. 1 and the dust-generating controller No. 2 both adopt AT89C51 single-chip microcomputers; the bidirectional communication ports of the dust-generating controller No. 1 and the dust-generating controller No. 2 are electrically connected to the bidirectional communication ports of the main controller No. 2.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention relies on the construction of a physical simulation platform for dust migration from multiple dust sources in confined underground spaces, combines the dust generation mechanism of mines and the requirements for simulation experiments on the law of dust migration, and adopts a reasonable mechanical structure design and a multi-motor intelligent control system to achieve four major system functions, including automatic dust particle size matching, controllable dust moisture content, matrix structure point-line-surface spraying, and adjustable spray speed, as well as multi-dimensional and three-dimensional experimental effects, thereby improving the authenticity of dust generation effects and the scientific nature of simulation experiments;

[0034] 2. The separate design of the dust proportioning chamber and the vibration chamber in the present invention enables the present invention to have the function of "automatic proportioning of dust particle size", which can achieve accurate proportioning and uniform mixing of three dusts with different particle sizes, and provide specific experimental conditions for simulation experiments;

[0035] The tight hoop is tightly fitted on the bottom of the vibration cavity, thus ensuring that the vibration amplitude of the lower part of the vibration cavity is much higher than that of the top during the vibration process;

[0036] The setting of dustproof cushion can not only prevent dust from overflowing, but also effectively reduce vibration and resonance of dust slideway;

[0037] The addition of the damping spring can effectively reduce the brake sliding displacement of the vibration cavity, and at the same time ensure that after the vibration motor is turned off, the vibration cavity will eventually stop in a vertical position after several residual vibrations;

[0038] The design of the swing rubber pad can not only serve as a dust sliding channel, but also prevent the heating cavity from generating resonance.

[0039] The slight resonance phenomenon driven by the vibrating cavity can ensure the smooth flow of dust;

[0040] 3. The present invention is equipped with a water mist motor and a heating wire, which can perform quantitative spraying on the mixed dust, realize the function of "controllable dust moisture content", improve the precision and uniformity of dust moisture content preparation, and meet the scientific requirements of simulation experiments for different dust moisture contents. The vibration frequency set by the present invention supports a dust moisture content of up to 1%;

[0041] Dust preparation, vibration and water mist spraying are carried out simultaneously to ensure the precision and uniformity of moisture content;

[0042] The water mist motor adopts a fixed-speed spray mode. The water mist volume signal set on the touch screen is transmitted to the water mist controller through the two-way communication port of the main controller. The water mist controller can calculate the spray duration according to the water mist volume and spray speed, and send the spray duration signal to the timer. After the timing is over, the water mist controller automatically turns off the water mist motor and stops spraying, thereby achieving an accurate ratio of dust and water, and improving the accuracy of artificially simulated dust moisture content;

[0043] After the experiment, the heating wire can heat and dry the vibration cavity to remove adhered dust and dry the cavity environment to prepare for the next experiment;

[0044] 4. The present invention designs a matrix dust generator, which can realize three dust spraying modes of point, line and surface, and the spraying speed is adjustable, which meets the specific conditions of the simulation experiment and truly restores the dust generation state and effect under different dust sources in the mine;

[0045] 5. The actual use results of the present invention show that the mechanical structure is reasonably designed, the electrical system is properly laid out, the vibration frequency is high, the power is strong, the multi-size dust ratio is accurate, the mixing is uniform, the dust moisture content is prepared with high precision and good uniformity, and the matrix dust generator can realize point, line and surface spraying with adjustable spray speed, which can fully meet the scientific requirements of the dust migration law simulation experiment for various experimental conditions and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 This is a simplified structural diagram of a matrix-type multi-particle-size dust generator with adjustable humidity and spray speed according to the present invention;

[0048] Figure 2 It is a schematic diagram of the transmission cavity structure of the present invention;

[0049] Figure 3 It is a schematic diagram of the structure of the matrix type dust generator of the present invention;

[0050] Figure 4 It is the electrical principle system block diagram of the present invention.

[0051] In the figure: 1-generator body; 2-dust chamber; 201-box cover; 202-first load-bearing plate; 203-second load-bearing plate; 204-box door; 205-dust collecting box; 3-matrix dust generator; 301-No. 1 dust generating motor; 302-No. 2 dust generating motor; 303-No. 3 dust generating motor; 304-No. 4 dust generating motor; 305-first particle nozzle; 306-second particle nozzle; 307-third particle nozzle; 308-point particle nozzle; 4-dust proportioning chamber; 401-No. 1 solenoid valve; 402-No. 2 solenoid valve; 403-No. 3 solenoid valve; 404-monobox; 405-switch controller; 5-wiring chamber; 6-main controller; 601 -touch screen; 7-heating cavity; 701-heating wire; 702-vibration damping spring; 703-swinging rubber pad; 8-vibration cavity; 801-tension spring; 802-dustproof cushion; 803-tightening ring; 804-No. 4 solenoid valve; 9-transmission cavity; 901-driving wheel; 902-transmission wheel; 903-swinging wheel; 904-bearing; 10-balance box; 11-main pulley; 12-sub-pulley; 13-anti-derailment track; 14-dust slide; 15-water mist motor; 16-water storage tank; 17-water pipeline; 18-water mist controller; 19-vibration controller; 20-dust controller one; 21-dust controller two; 22-vibration motor; 23-water mist nozzle. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] See also Figures 1 to 4 As shown, a matrix-type multi-particle size dust generator with adjustable humidity and spray speed, the dust generator comprises a generator body 1, the generator body 1 is provided with a dust making cavity 2 and a matrix-type dust generator 3, the dust making cavity 2 is provided with a dust proportioning cavity 4, a primary bearing plate 202, a wiring cavity 5, a heating cavity 7, a vibration cavity 8, a transmission cavity 9, and a secondary bearing plate 203;

[0055] The dust making chamber 2 is provided with a box cover 201, a box door 204, a touch screen 601 and a dust collecting box 205;

[0056] The dust proportioning chamber 4 is equipped with a first solenoid valve 401, a second solenoid valve 402, a third solenoid valve 403, a monomer box 404, a switch controller 405, a main controller 6 and a water storage tank 16;

[0057] The wiring cavity 5 is provided with a dust slide 14, a water pipe 17, a vibration motor 22 and a vibration controller 19;

[0058] The heating cavity 7 is provided with a water mist motor 15, a water mist controller 18, a heating wire 701, a tension spring 801, a damping spring 702 and a swing rubber pad 703;

[0059] The vibration cavity 8 is provided with a dustproof cushion 802, a tight hoop 803 and a fourth solenoid valve 804; the transmission cavity 9 is provided with a driving wheel 901, a transmission wheel 902, a swing wheel 903, a bearing 904, a balance box 10, a main pulley 11, a sub-pulley 12 and an anti-slip track 13;

[0060] The matrix dust generator 3 is provided with a dust generating motor No. 1 301, a dust generating motor No. 2 302, a dust generating motor No. 303, a dust generating motor No. 4 304, a dust generating controller No. 1 20, a dust generating controller No. 2 21, a primary particle nozzle 305, a secondary particle nozzle 306, a tertiary particle nozzle 307 and a point particle nozzle 308.

[0061] Furthermore, the dust making chamber 2 is designed to have a cylindrical structure, and the top of the dust making chamber 2 is rotatably connected to the box cover 201 through a hinge. A connected box door 204 is provided on one side of the dust making chamber 2, and the box door 204 passes through the dust proportioning chamber 4 and the wiring chamber 5. Handles are provided on the box door 204 and the box cover 201. A touch screen 601 is embedded on the other side of the dust making chamber 2 and on the wall of the dust proportioning chamber 4, and the touch screen 601 is electrically connected to the main controller 6.

[0062] Furthermore, a main controller 6 and a switch controller 405 are installed on the primary load-bearing plate 202. The core component inside the main controller 6 adopts a DSP28335 control chip, and the core component inside the switch controller 405 adopts an AT89C51 single-chip microcomputer.

[0063] Furthermore, the inner bottom of the three monomer boxes 404 are respectively inlaid with a first solenoid valve 401, a second solenoid valve 402 and a third solenoid valve 403, the control ports of the first solenoid valve 401, the second solenoid valve 402 and the third solenoid valve 403 are respectively electrically connected to the PWM port of the switch controller 405, and the bidirectional communication port of the switch controller 405 is electrically connected to the bidirectional communication port of the main controller 6;

[0064] The bottom of the monomer box 404 penetrates the primary load-bearing plate 202 and extends into the dust chute 14. The monomer box 404 and the dust chute 14 are both designed in an inverted funnel-shaped structure, and the bottom end of the dust chute 14 extends into the vibration cavity 8.

[0065] The water storage tank 16 is fixedly mounted on one side of the primary load-bearing plate 202. The center of the bottom end of the water storage tank 16 is connected to the input end of the water mist motor 15 through a water pipe 17. The water mist motor 15 is fixedly mounted on the heating cavity 7. The output end of the water mist motor 15 is connected to the water mist nozzle 23. The water mist nozzle 23 extends into the vibration cavity 8.

[0066] The water mist motor 15 adopts a micro stepping motor, and the water mist motor 15 is electrically connected to the water mist controller 18 through a second driving circuit. The bidirectional communication port of the water mist controller 18 is electrically connected to the bidirectional communication port of the main controller 6. The core component in the water mist controller 18 adopts an AT89C51 single chip microcomputer.

[0067] Furthermore, the heating cavity 7 is designed to be cylindrical in structure, and a heating wire 701 is wound on the inner wall of the heating cavity 7, and the heating wire 701 is directly connected to the 220V AC power supply. The top of the inner side of the heating cavity 7 is connected to the top of the vibration cavity 8 through four tension springs 801, and the right side of the inner side of the heating cavity 7 is connected to one side of the vibration cavity 8 through a damping spring 702, and the bottom of the inner side of the heating cavity 7 is connected to the bottom of the vibration cavity 8 through a swinging rubber pad 703.

[0068] Furthermore, the vibration cavity 8 is designed in an inverted funnel-shaped structure, and a circle of dustproof cushion 802 is installed at the center of the top of the vibration cavity 8. The dustproof cushion 802 is tightly connected to the bottom of the dust slide 14. A No. 4 solenoid valve 804 is inlaid at the bottom of the vibration cavity 8. The control port of the No. 4 solenoid valve 804 is electrically connected to the PWM port of the switch controller 405. A tightly fitted tight hoop 803 is provided at the center position of the outer side of the vibration cavity 8, and the side of the tight hoop 803 is fixedly connected to one end of the balance box 10.

[0069] Further, the transmission cavity 9 is fixedly nested in the secondary load-bearing plate 203, a vibration motor 22 is installed above the transmission cavity 9, the vibration motor 22 is electrically connected to the vibration controller 19 through a driver, the bidirectional communication port of the vibration controller 19 is electrically connected to the bidirectional communication port of the main controller 6, the core component in the vibration controller 19 adopts a DSP28335 control chip, and the vibration motor 22 adopts a brushless DC motor;

[0070] The output shaft of the vibration motor 22 is fixedly connected to the center of the driving wheel 901, and the bottom end of the output shaft is rotatably connected to the bottom surface of the transmission cavity 9 through a bearing 904. The driving wheel 901 is rotatably connected to the transmission wheel 902 through teeth. The transmission wheel 902 is fixedly mounted on the swing wheel 903 and the two are not concentric. The transmission wheel 902 and the swing wheel 903 are rotatably connected to the upper and lower surfaces inside the transmission cavity 9 through a connecting rod and a bearing 904. The bearing 904 is embedded in the transmission cavity 9.

[0071] The circumferential surface of the swing wheel 903 is designed with a groove-shaped structure, and the groove is rotatably connected to the main pulley 11. An anti-slip track 13 is arranged around the swing wheel 903. The main pulley 11 and the sub-pulley 12 are respectively installed in the balance box 10, and the anti-slip track 13 is rotatably connected to the sub-pulley 12.

[0072] Furthermore, the power supply module of the main controller 6 adopts a switching power supply, which can convert 220V AC power into two voltages of 3.3V and 5V, wherein 3.3V is supplied to the DSP28335 control chip in the main controller 6 and the vibration controller 19, and 5V is supplied to the AT89C51 microcontroller in the switch controller 405, the water mist controller 18, the dust generation controller 1 20 and the dust generation controller 2 21.

[0073] Furthermore, the center of the bottom surface of the dust-making chamber 2 is connected to the top of the dust collecting box 205. The dust collecting box 205 is designed in a funnel-shaped structure, and 4 small holes are opened at the bottom of the dust collecting box 205. The 4 small holes are respectively connected to the input ends of the first dust-generating motor 301, the second dust-generating motor 302, the third dust-generating motor 303 and the fourth dust-generating motor 304;

[0074] The output end of the first dust generating motor 301 is connected to three primary particle nozzles 305 on one side of the matrix dust generator 3, and the three primary particle nozzles 305 are installed in a straight line;

[0075] The output end of the second dust generating motor 302 is connected to the three secondary particle nozzles 306 in the middle of the matrix dust generator 3, and the three secondary particle nozzles 306 are installed in a straight line;

[0076] The output end of the third dust-generating motor 303 is connected to two third-level particle nozzles 307 on the other side of the matrix dust generator 3;

[0077] The output end of the fourth dust-generating motor 304 is connected to the point-type particle nozzle 308, and the third-level particle nozzle 307 and the point-type particle nozzle 308 are installed on the same straight line;

[0078] The first-level particle nozzle 305, the second-level particle nozzle 306, the third-level particle nozzle 307, and the point-type particle nozzle 308 are not connected to each other;

[0079] The dust-generating motor No. 1 301, the dust-generating motor No. 2 302, the dust-generating motor No. 303 and the dust-generating motor No. 4 304 all adopt micro stepping motors; the dust-generating motor No. 1 301 and the dust-generating motor No. 2 302 are respectively electrically connected to the PWM port of the dust-generating controller No. 1 20, the dust-generating motor No. 303 and the dust-generating motor No. 4 304 are respectively electrically connected to the PWM port of the dust-generating controller No. 2 21, the dust-generating controller No. 1 20 and the dust-generating controller No. 2 21 both adopt AT89C51 single-chip microcomputers, and the bidirectional communication ports of the dust-generating controller No. 1 20 and the dust-generating controller No. 2 21 are respectively electrically connected to the bidirectional communication ports of the main controller 6.

[0080] Working principle:

[0081] The present invention realizes four system functions of automatic dust particle size matching, controllable dust moisture content, matrix structure point, line and surface spraying, and adjustable spray speed, as well as multi-dimensional and three-dimensional experimental effects.

[0082] 1. Principle and steps of the "automatic dust particle size matching" function:

[0083] First, manually open the box cover 201, and selectively open three single boxes 404 according to the requirements of the dust particle size type in the experiment, and inject a certain amount of dust. The same single box 404 is only allowed to inject dust of one particle size;

[0084] Secondly, the main controller 6 is powered on, the vibration motor 22 is started through the touch screen 601, and the speed is adjusted as required. At this time, under the power output of the vibration motor 22 and its reduction box, the driving wheel 901 drives the transmission wheel 902 to rotate at the same speed, and the swing wheel 903, which is the same body but not concentric with the transmission wheel 902, rotates at the same angular velocity with it. Under the stabilizing effect of the balance box 10 composed of the main pulley 11, the branch pulley 12, and the anti-derailment track 13, the swing wheel 903 drives the tight hoop 803 at the bottom of the vibration cavity 8 to do reciprocating vibration in the horizontal line, and the vibration frequency is adjustable;

[0085] During the vibration process, the vibration amplitude of the lower part of the vibration cavity 8 is much higher than that of the top part; the dustproof cushion 802 can not only prevent dust from overflowing, but also effectively reduce vibration, and effectively reduce the resonance phenomenon of the dust slide 14; the damping spring 702 can effectively reduce the braking sliding displacement of the vibration cavity 8, and at the same time can ensure that after the vibration motor 22 is turned off, the vibration cavity 8 will eventually stop in a vertical position after several residual vibrations; the swing rubber pad 703 can not only serve as a dust sliding channel, but also prevent the heating cavity 7 from generating resonance;

[0086] Finally, the solenoid valve in the dust-containing monomer box 404 is started through the touch screen 601, and the switch amount of the corresponding solenoid valve is adjusted according to the experimental requirements for the ratio of dust with different particle sizes. The switch controller 405 calculates the dust flow rate during the switch time according to the switch amount, dust particle size and switch time, thereby achieving accurate ratio. Dust with different particle sizes enters the vibration cavity 8 through the dust chute 14. The slight resonance generated by the dust chute 14 can ensure that all dust slides smoothly into the vibration cavity 8. Under the vibration of the vibration cavity 8, the uniform mixing of dust with different particle sizes is achieved.

[0087] 2. The vibration frequency set by the present invention supports a dust moisture content of 1% at most. The implementation principle and steps of the "dust moisture content controllable" function:

[0088] First, manually open the box door 204, inject a proper amount of clean water into the water storage tank 16, and close the box door 204;

[0089] Then, the vibration motor 22 is turned on through the touch screen 601, and the speed is adjusted as required;

[0090] Furthermore, according to the experimental dust moisture content requirement, a quantitative single-particle size dust or multi-particle size dust is fed into the vibrating vibrating cavity 8 in accordance with the above-mentioned "automatic dust particle size matching" step;

[0091] Finally, according to the experimental dust moisture content requirement and the prepared dust amount, the required water mist amount is manually calculated, and the required water mist amount is set through the touch screen 601, and the water mist motor 15 is started at the same time; at this time, the water mist motor 15 draws water from the water tank 16 through the water pipe 17, forms water mist through the water mist nozzle 23, and then slowly sprays it into the vibration cavity 8; dust preparation, vibration, and water mist spraying are carried out in a trinity and synchronously, thereby ensuring the precision and uniformity of the moisture content.

[0092] The water mist motor 15 adopts a fixed-speed spraying mode. The water mist amount signal set on the touch screen 601 is transmitted to the water mist controller 18 through the two-way communication port of the main controller 6. The water mist controller 18 can calculate the spraying duration according to the water mist amount and the spraying speed, and send the spraying duration signal to the timer. After the timing is over, the water mist controller 18 automatically turns off the water mist motor 15 and stops spraying, thereby achieving an accurate ratio of dust and water, and improving the accuracy of artificially simulated dust moisture content.

[0093] After the experiment is finished, the heating wire 701 can be connected to the 220V mains to heat and dry the vibration cavity 8, remove the adhered dust, and dry the cavity environment to prepare for the next experiment.

[0094] 3. The principle and steps of realizing the “matrix structure point, line and surface spraying” and adjustable spray speed function:

[0095] Point spraying function:

[0096] First, the vibration is stopped through the touch screen 601, and the mixed dust formed by the vibration cavity 8 is called modulated dust; the fourth solenoid valve 804 is opened through the touch screen 601, and the modulated dust slides into the dust box 205 along the inner wall of the swing rubber pad 703;

[0097] Then, the spraying speed of the fourth dust-producing motor 304 is set through the touch screen 601, and the fourth dust-producing motor 304 is turned on at the same time (the other dust-producing motors are in the off state), and the dust is modulated to be sprayed out through the point particle nozzle 308, thereby realizing the point spraying function.

[0098] Line spraying function:

[0099] First, after the modulated dust enters the dust collecting box 205, the first dust generating motor 301 or the second dust generating motor 302 is manually selected through the touch screen 601. This description takes the selection of the first dust generating motor 301 as an example;

[0100] Secondly, the spraying speed of the No. 1 dust-producing motor 301 is set through the touch screen 601, and the No. 1 dust-producing motor 301 is turned on at the same time (the other dust-producing motors are in the off state). At this time, the modulated dust is sprayed out through the three primary particle nozzles 305, thereby realizing the linear spraying function.

[0101] Surface spraying function:

[0102] First, after the modulated dust enters the dust collecting box 205, the spraying speeds of the dust-producing motor No. 1 301, the dust-producing motor No. 2 302, the dust-producing motor No. 303 and the dust-producing motor No. 4 304 are set respectively through the touch screen 601, and then the four dust-producing motors are turned on at the same time. At this time, the modulated dust is sprayed out simultaneously through the primary particle nozzle 305, the secondary particle nozzle 306, the tertiary particle nozzle 307 and the point particle nozzle 308, thereby realizing the surface spraying function.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0104] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A matrix-type multi-particle size dust generator with adjustable humidity and spray speed, the dust generator comprising a generator body (1), characterized in that: The generator body (1) comprises a dust-making cavity (2) and a matrix dust generator (3); a dust proportioning cavity (4) is arranged in the dust-making cavity (2); a first-level bearing plate (202) is arranged below the dust proportioning cavity (4); a heating cavity (7) is arranged below the first-level bearing plate (202); a wiring cavity (5) is arranged on one side of the heating cavity (7); a second-level bearing plate (203) is arranged on the other side of the heating cavity (7); a transmission cavity (9) is arranged below the wiring cavity (5); and a vibration cavity (8) is also arranged in the heating cavity (7); The dust-making chamber (2) is provided with a box cover (201), a box door (204), a touch screen (601) and a dust collection box (205); The dust proportioning chamber (4) is equipped with a first solenoid valve (401), a second solenoid valve (402), a third solenoid valve (403), a monomer box (404), a switch controller (405), a main controller (6) and a water storage tank (16); The wiring cavity (5) is provided with a dust slide (14), a water pipeline (17), a vibration motor (22) and a vibration controller (19); The heating cavity (7) is provided with a water mist motor (15), a water mist controller (18), a heating wire (701), a tension spring (801), a vibration-damping spring (702) and a swinging rubber pad (703); The vibration cavity (8) is provided with a dustproof cushion (802), a tight hoop (803) and a No. 4 electromagnetic valve (804); the transmission cavity (9) is provided with a driving wheel (901), a transmission wheel (902), a swing wheel (903), a bearing (904), a balance box (10), a main pulley (11), a branch pulley (12) and an anti-derailment track (13); The matrix dust generator (3) is provided with a first dust generating motor (301), a second dust generating motor (302), a third dust generating motor (303), a fourth dust generating motor (304), a first dust generating controller (20), a second dust generating controller (21), a first-level particle nozzle (305), a second-level particle nozzle (306), a third-level particle nozzle (307) and a point-type particle nozzle (308); The inner bottom of the monomer box (404) is respectively inlaid with a first solenoid valve (401), a second solenoid valve (402) and a third solenoid valve (403); the control ports of the first solenoid valve (401), the second solenoid valve (402) and the third solenoid valve (403) are respectively electrically connected to the PWM port of the switch controller (405); and the bidirectional communication port of the switch controller (405) is electrically connected to the bidirectional communication port of the main controller (6); The bottom of the single box (404) penetrates the primary load-bearing plate (202) and extends into the dust chute (14); the single box (404) and the dust chute (14) are both designed as an inverted funnel-shaped structure, and the bottom end of the dust chute (14) extends into the vibration cavity (8); The water storage tank (16) is fixedly mounted on one side of the primary load-bearing plate (202); the center of the bottom end of the water storage tank (16) is connected to the input end of the water mist motor (15) through a water delivery pipe (17); the water mist motor (15) is fixedly mounted on the heating cavity (7); the output end of the water mist motor (15) is connected to the water mist nozzle (23); and the water mist nozzle (23) extends into the vibration cavity (8); The water mist motor (15) is a micro-stepping motor, the water mist motor (15) is electrically connected to the water mist controller (18) through a second driving circuit, the bidirectional communication port of the water mist controller (18) is electrically connected to the bidirectional communication port of the main controller (6), and the core component of the water mist controller (18) is an AT89C51 single-chip microcomputer; The heating cavity (7) is designed in a cylindrical structure. A heating wire (701) is wound on the inner wall of the heating cavity (7). The heating wire (701) is directly connected to the 220V mains electricity. The top of the inner side of the heating cavity (7) is connected to the top of the vibration cavity (8) via four tension springs (801). The right side of the inner side of the heating cavity (7) is connected to one side of the vibration cavity (8) via a damping spring (702). The bottom of the inner side of the heating cavity (7) is connected to the bottom of the vibration cavity (8) via a swing rubber pad (703). The center of the bottom surface of the dust-making cavity (2) is connected to the top of the dust collecting box (205); the dust collecting box (205) is designed in a funnel-shaped structure; four small holes are opened at the bottom of the dust collecting box (205); the four small holes are respectively connected to the input ends of the first dust-generating motor (301), the second dust-generating motor (302), the third dust-generating motor (303) and the fourth dust-generating motor (304); The output end of the first dust-generating motor (301) is connected to three primary particle nozzles (305) on one side of the matrix dust generator (3), and the three primary particle nozzles (305) are installed in a straight line; The output end of the second dust-generating motor (302) is connected to three secondary particle nozzles (306) in the middle of the matrix dust generator (3), and the three secondary particle nozzles (306) are installed in a straight line; The output end of the third dust-generating motor (303) is connected to two third-level particle nozzles (307) on the other side of the matrix dust generator (3); The output end of the fourth dust-generating motor (304) is connected to the point-type particle nozzle (308), and the third-level particle nozzle (307) and the point-type particle nozzle (308) are installed on the same straight line; The first-stage particle nozzle (305), the second-stage particle nozzle (306), the third-stage particle nozzle (307), and the point-type particle nozzle (308) are not connected to each other; The first dust-generating motor (301), the second dust-generating motor (302), the third dust-generating motor (303) and the fourth dust-generating motor (304) are all micro-stepping motors; the first dust-generating motor (301) and the second dust-generating motor (302) are respectively electrically connected to the PWM port of the first dust-generating controller (20); the third dust-generating motor (303) and the fourth dust-generating motor (304) are respectively electrically connected to the PWM port of the second dust-generating controller (21); the first dust-generating controller (20) and the second dust-generating controller (21) are both AT89C51 single-chip microcomputers; the bidirectional communication ports of the first dust-generating controller (20) and the second dust-generating controller (21) are respectively electrically connected to the bidirectional communication port of the main controller (6).

2. A matrix type multi-particle size dust generator with adjustable humidity and spray speed according to claim 1, characterized in that: The dust-making chamber (2) is designed to be cylindrical in structure. The top of the dust-making chamber (2) is rotatably connected to the box cover (201) via a hinge. A connected box door (204) is provided on one side of the dust-making chamber (2). The box door (204) passes through the dust proportioning chamber (4) and the wiring chamber (5). Both the box door (204) and the box cover (201) are provided with handles. A touch screen (601) is embedded on the other side of the dust-making chamber (2) and on the wall of the dust proportioning chamber (4). The touch screen (601) is electrically connected to the main controller (6).

3. The humidity and spray speed adjustable matrix multi-particle size dust generator according to claim 1, characterized in that: A main controller (6) and a switch controller (405) are installed on the primary load-bearing plate (202). The core component inside the main controller (6) adopts a DSP28335 control chip, and the core component inside the switch controller (405) adopts an AT89C51 single-chip microcomputer.

4. The humidity and spray speed adjustable matrix multi-particle size dust generator according to claim 1, characterized in that: The vibration cavity (8) is designed in an inverted funnel-shaped structure. A dustproof cushion (802) is installed at the center of the top of the vibration cavity (8). The dustproof cushion (802) is tightly connected to the bottom of the dust slideway (14). A fourth solenoid valve (804) is embedded at the bottom of the vibration cavity (8). The control port of the fourth solenoid valve (804) is electrically connected to the PWM port of the switch controller (405). A tightly sleeved tight ring (803) is provided at the center of the outer side of the vibration cavity (8). The side of the tight ring (803) is fixedly connected to one end of the balance box (10).

5. The humidity and spray speed adjustable matrix multi-particle size dust generator according to claim 1, characterized in that: The transmission cavity (9) is fixedly nested in the secondary load-bearing plate (203); a vibration motor (22) is installed above the transmission cavity (9); the vibration motor (22) is electrically connected to the vibration controller (19) through a driver; a bidirectional communication port of the vibration controller (19) is electrically connected to a bidirectional communication port of the main controller (6); a core component in the vibration controller (19) adopts a DSP28335 control chip; and the vibration motor (22) adopts a brushless DC motor; The output shaft of the vibration motor (22) is fixedly connected to the center of the driving wheel (901), the bottom end of the output shaft is rotatably connected to the bottom surface of the transmission cavity (9) through a bearing (904), the driving wheel (901) is rotatably connected to the transmission wheel (902) through teeth, the transmission wheel (902) is fixedly mounted on the swing wheel (903) and the two are not concentric, the transmission wheel (902) and the swing wheel (903) are rotatably connected to the upper and lower surfaces inside the transmission cavity (9) through a connecting rod and a bearing (904), and the bearing (904) is embedded in the transmission cavity (9); The circumferential surface of the swing wheel (903) is designed with a groove-shaped structure, the groove is rotationally connected to the main pulley (11), and the periphery of the swing wheel (903) is provided with an anti-slip track (13), the main pulley (11) and the branch pulley (12) are respectively installed in the balance box (10), and the anti-slip track (13) is rotationally connected to the branch pulley (12).

6. The humidity and spray speed adjustable matrix multi-particle size dust generator according to claim 3, characterized in that: The power supply module of the main controller (6) adopts a switching power supply, which can convert 220V mains electricity into two voltages of 3.3V and 5V, wherein 3.3V is supplied to the DSP28335 control chip in the main controller (6) and the vibration controller (19), and 5V is supplied to the AT89C51 single-chip microcomputer in the switch controller (405), the water mist controller (18), the dust generation controller 1 (20) and the dust generation controller 2 (21).

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