A detection device for regulating the particle size distribution of superfine high-purity spherical silicon powder

Abstract

The application discloses a kind of superfine high-purity spherical silicon micro-powder particle size distribution regulation and detection device, belongs to laser particle size instrument technical field.A kind of superfine high-purity spherical silicon micro-powder particle size distribution regulation and detection device, including base, the side of base upper end is provided with detection box, first detection frame and second detection frame are sequentially arranged in the middle position of detection box longitudinally.The application solves the problem that the existing laser particle size instrument cannot adjust the flow rate according to the weight of the sample when measuring and using wet measurement, which causes an additional step of measuring the weight of the sample and adjusting the weight of the sample before measuring and feeding the sample, resulting in a decrease in the efficiency of the device use and detection.The application adjusts the connection aperture of the entire flow trajectory by rotating the first connecting pipe and the second connecting pipe after measuring the weight of the detection object, adjusts the flow rate of the liquid and the particles by adjusting the aperture, and adapts to the amount of input material.

Description

Technical Field

[0001] This invention relates to the field of laser particle size analyzer technology, specifically to a detection device for controlling the particle size distribution of ultrafine, high-purity spherical silicon micropowder. Background Technology

[0002] The detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder is essentially a laser particle size analyzer. It measures the particle size distribution by means of laser scattering. It uses a laser beam to irradiate the sample, and the light signal scattered by the particles is received by the detector. The particle size distribution data is then processed by a computer. This device is suitable for controlling the particle size of ultrafine high-purity spherical silicon micropowder, ensuring uniform particle size of the product and meeting the needs of high-end applications.

[0003] When using a laser particle size analyzer for wet measurement, the sample is dispersed in a liquid. Each time a sample is added into the device, the weight of the sample must be strictly measured. The device itself cannot adjust the flow rate according to the weight of the sample, which requires an additional step of measuring and adjusting the sample weight before measurement and sample addition, thus reducing the efficiency of the device in use and testing. Summary of the Invention

[0004] The purpose of this invention is to provide a detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder. After measuring the weight of the sample, the diameter of the connection port to the entire flow trajectory can be adjusted by rotating the first and second connecting pipes. The flow rate of the liquid and particles can be adjusted by adjusting the diameter to adapt to the amount of material input, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder, comprising a base, a detection box disposed on one side of the upper end of the base, a first detection frame and a second detection frame longitudinally arranged in the middle of the detection box, an input pipe disposed at one end of the first detection frame, an output pipe disposed at one end of the second detection frame, three first connecting pipes with sequentially increasing liquid flow diameters disposed around the input pipe and the first detection frame, three second connecting pipes with sequentially increasing liquid flow diameters disposed at the other end between the first and second detection frames, a stirring tank and a support disposed in sequence on one side of the front end of the detection box, an electronic scale and a fixing frame disposed in sequence on the upper end of the support, by adjusting the first connecting pipes and the second connecting pipes, the input pipes of corresponding diameters are connected to the first and second detection frames, the flow rate is adjusted for silicon micropowder of different weights, and different detection requirements are met.

[0006] Preferably, the three first connecting pipes are fixedly connected to each other by a first connecting block, and the three second connecting pipes are fixedly connected to each other by a second connecting block. The connection of the first connecting block and the second connecting block facilitates the adjustment of the positions of the first connecting pipes and the second connecting pipes.

[0007] Preferably, a stepping motor is provided at one end of both the second connecting block and the first connecting block, and a sliding rail is provided at the upper end of the inside of the detection box. The outer wall of the stepping motor slides and is embedded in the sliding rail. A first hydraulic rod is provided at one end of the second connecting block and the first connecting block corresponding to the stepping motor. The stepping motor and the first connecting pipe and the second connecting pipe connected to the stepping motor can be adjusted laterally by the extension and retraction of the first hydraulic rod.

[0008] Preferably, a second hydraulic rod is provided on one side of the connection position between the input tube and the first connecting tube, and the two ends of the second hydraulic rod are respectively fixedly connected to the outside of the detection box and the input tube. The input tube can be pulled out independently through the second hydraulic rod to avoid the input tube affecting the adjustment of the first connecting tube.

[0009] Preferably, the first connecting block includes a central shaft and three connectors. Each connector includes a sleeve and a connecting part. The sleeve is provided with two openable arc-shaped plates. The interior of the connecting part is provided with two sets of drive components that control the opening and closing of the two arc-shaped plates respectively. Each drive component includes a micro motor, a drive shaft, and two connecting rods. The drive shaft is rotatably connected to the micro motor. Both ends of the drive shaft are provided with drive disks. One end of each connecting rod is rotatably connected to the drive disk, and the other end of each drive rod is rotatably connected to the corresponding arc-shaped plate.

[0010] Preferably, the mixing tank is equipped with a stirrer inside, one side of which is embedded in the outer wall of the mixing tank and slidably connected to the outer wall of the mixing tank. The longitudinal sliding of the stirrer can expose the upper end of the mixing tank, which facilitates the addition of the test material.

[0011] Preferably, clamping blocks are provided at both ends inside the fixed frame, and second threaded rods are provided through both sides inside the clamping blocks. The outer side of the second threaded rods is threadedly engaged with the through position of the clamping block. The container can be clamped and fixed by the relative movement of a pair of clamping blocks.

[0012] Preferably, one side of the fixed frame is rotatably connected to the upper end of the support, and the container held by the rotation is used to pour the object to be tested into the mixing tank.

[0013] Preferably, a collection box is provided at the lower end of the detection box, and a discharge port is provided on the side of the collection box facing the detection box, which penetrates the lower end of the detection box. The wastewater discharged after subsequent cleaning can be discharged directly after the first connecting pipe is separated from the first detection frame, so that the wastewater falls into the collection box.

[0014] Preferably, the front end of the detection box is provided with a touch terminal, which has a built-in detection system consisting of a reset module, a weight extraction module, a calculation module, an adjustment module, and a detection module, which is used to assist in the detection of particle size distribution of ultrafine high-purity spherical silicon micropowder.

[0015] The weight extraction module is used to extract the weight of the detected silicon micropowder;

[0016] The calculation module is used to determine the number of clockwise rotation steps of the motor at one end of the second connecting block and the first connecting block by using the formula calculation and the data extracted by the weight extraction module.

[0017] The calculation formula in the above calculation module is as follows:

[0018]

[0019] In the above formula, H(x) is the unit step function:

[0020]

[0021] In the above calculation formula, W is the weight of the material to be tested extracted by the weight extraction module, in g; W1 is the dividing threshold between the weight of the material to be tested corresponding to the large-diameter first and second connecting pipes and the medium-diameter first and second connecting pipes, in g; W2 is the dividing threshold between the weight of the material to be tested corresponding to the medium-diameter first and second connecting pipes and the small-diameter first and second connecting pipes, in g.

[0022] θ1 is the angle between the large-diameter first and second connecting pipes and the corresponding stepping motor, in degrees; θ2 is the angle between the medium-diameter first and second connecting pipes and the corresponding stepping motor, in degrees; θ3 is the angle between the small-diameter first and second connecting pipes and the corresponding stepping motor, in degrees.

[0023] α is the step angle of the stepper motor, in degrees per step;

[0024] N is the number of pulses required by the drive motor, in steps. The calculated N can be used to give the adjustment module a start signal to adjust the angle of the first connecting pipe and the second connecting pipe so that the diameter of the first connecting pipe and the second connecting pipe corresponds to the weight of the material being transmitted.

[0025] The adjustment module is used to rotate and adjust the first connecting block and the second connecting pipe based on the data calculated by the calculation module, and to give start signals to the second hydraulic rod, the two first hydraulic rods, the second connecting block and the upper step motor of the first connecting block;

[0026] The detection module is used to capture images and extract data of the liquid flowing at the second detection frame position and the particles in the liquid, and to characterize and detect the liquid flowing at the first detection frame position and the particles in the liquid through the first detection frame.

[0027] The reset module is used to restore the first connecting pipe and the first connecting block to their original state before adjustment after the detection is completed and the internal cleaning of the device is finished.

[0028] Preferably, based on the weight extraction module, calculation module, and adjustment module, the target liquid flow orifice diameter is determined using the following steps, and the stepper motor is controlled to rotate, driving the first hydraulic rod (26) to rotate the first connecting block (15) to the first connecting pipe (16) corresponding to the target liquid flow orifice diameter:

[0029] The liquid flow ports of the three first connecting pipes (16) are preset to be a first diameter, a second diameter, and a third diameter, respectively;

[0030] The weight extraction module performs the following steps:

[0031] Based on the current weight value of the silicon powder weighed by the electronic scale (7), the silicon powder is put into the mixing tank (5) and stirred to form a flowing liquid. A preset flow time is set for the entire flow process from the input pipe (14) through the first connecting pipe (16), the first detection box (18), the second connecting pipe (17), the second detection box (19) and then out of the output pipe (20).

[0032] The calculation module performs the following steps:

[0033] Based on the length of the flowing liquid throughout the entire flow process and the preset flow time, the estimated flow velocity of the flowing liquid is calculated.

[0034] Based on the current weight and density of the silica powder and the preset flow time, the flow rate of the liquid is calculated. The formula for calculating the flow rate of the liquid is as follows:

[0035] Wherein, represents the flow rate of the moving liquid, in cubic meters per second; m represents the current weight of the silicon powder, in kilograms; represents the density of the silicon powder; and t represents time, in seconds.

[0036] The estimated cross-sectional area of ​​the first connecting pipe (16) is calculated based on the flow rate and estimated velocity of the flowing liquid.

[0037] The estimated target diameter of the first connecting pipe (16) is calculated based on the estimated cross-sectional area of ​​the pipe, and the liquid flow diameter closest to the estimated target diameter of the first connecting pipe (16) is selected as the target liquid flow diameter.

[0038] The adjustment module performs the following steps: after obtaining the target liquid flow diameter of the first connecting pipe (16), the adjustment module controls the stepper motor to move and drives the first hydraulic rod (26) to rotate the first connecting block (15) to the first connecting pipe (16) corresponding to the target liquid flow diameter.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. In this invention, when the liquid carries the silicon micropowder to be tested through the pipes in the detection box, the first and second connecting pipes of different diameters are adjusted according to the amount of silicon micropowder added to the stirring tank. By reducing the diameter of the first and second connecting pipes, the flow speed of the material in the first and second detection frames is increased when more silicon micropowder is added. Conversely, by increasing the diameter of the first and second connecting pipes, the flow speed in the first and second detection frames is reduced when less silicon micropowder is added. The faster passage of more particles can prevent particle accumulation, while the slower passage of less material avoids the inability to fully perform the required silicon micropowder particle size distribution control detection due to slow speed. This eliminates the need to frequently adjust the power of the electromagnetic circulation pump to adapt to different amounts of material added.

[0041] 2. This invention features an electronic scale supported by a bracket mounted on one side of a mixing tank. A container is pre-placed on top of the electronic scale. After the spherical silicon micropowder particles to be added to the mixing tank are poured into the container on top of the electronic scale, the electronic scale can be activated to measure the weight of the material in the container. After measurement, the powder material in the container can be actively poured out by clamping blocks and rotating on the bracket. The user only needs to place the container on top of the electronic scale, turn on the electronic scale, and add the material to be measured into the container, reducing the difficulty of operation and making it convenient for the user. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0043] Figure 2 This is a schematic diagram showing the positional relationship of the electromagnetic circulation pump of the present invention;

[0044] Figure 3 This is a schematic diagram of the internal structure of the detection box of the present invention;

[0045] Figure 4 This is a cross-sectional view of the internal structure of the first connecting pipe of the present invention;

[0046] Figure 5 This is a cross-sectional view showing the positional relationship of the collection box in this invention;

[0047] Figure 6 This is a schematic diagram of the external structure of the first connecting pipe of the present invention;

[0048] Figure 7 This is a schematic diagram of the interior of the first connecting block of the present invention;

[0049] Figure 8 Cross-sectional view of the internal structure of the second connecting pipe;

[0050] Figure 9 This is a schematic diagram of the first threaded rod transmission structure of the present invention;

[0051] Figure 10 This is a cross-sectional view of the clamping block transmission structure of the present invention;

[0052] Figure 11 This is a schematic diagram of the detection system of the present invention.

[0053] In the diagram: 1. Base; 2. Touch terminal; 3. Detection box; 4. Collection box; 5. Mixing tank; 6. Support; 7. Electronic scale; 8. Fixing frame; 10. Stirrer; 11. Electromagnetic circulation pump; 12. Digital camera; 13. Monochrome laser source; 14. Input pipe; 15. First connecting block; 151. Central shaft; 152. Connector; 1521. Sleeve; 1522. Connecting part; 1523. Arc plate; 1524. Support block; 16. First connecting pipe; 17. Second connecting pipe; 18. First detection frame; 19. Second detection frame; 20. Output pipe; 21. Discharge port; 24. Second connecting block; 26. First hydraulic rod; 27. First threaded rod; 28. Outer pipe; 29. ​​Second threaded rod; 30. Clamping block; 31. Second hydraulic rod; 32. Sliding rail; 40. Drive assembly; 41. Micro motor; 42. Drive shaft; 43. Connecting rod. Detailed Implementation

[0054] The present invention will be further described below with reference to specific embodiments.

[0055] like Figure 1 and Figure 2 As shown, the detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder in this embodiment includes a base 1, and a detection box 3 is provided on one side of the upper end of the base 1. The powder to be detected is put into the stirring tank 5 and mixed in the liquid. It is then drawn by the electromagnetic circulation pump 11 and sent into the detection box 3 for detection.

[0056] Among them, such as Figure 2 and Figure 5As shown, a pair of digital cameras 12 are installed on one side inside the detection box 3. The two digital cameras 12 have magnification of 0.5x and 10x respectively, which improves the reliability of particle detection and the ability to measure small particles. This makes the images of the detected particles clear, sharp and realistic. The accuracy of the images improves the accuracy of the device in obtaining parameters such as aspect ratio and roundness. A second detection frame 19 is set in the middle of the detection box 3. When the liquid carries the particles through the second detection frame 19, they are photographed and detected by the pair of digital cameras 12.

[0057] A monochromatic laser source 13 is provided at the top of the digital camera 12, and a first detection frame 18 is provided at the top of the second detection frame 19. The monochromatic laser source 13 is aligned with the position of the first detection frame 18 for detection. Two obliquely incident lenses are provided on both sides inside the first detection frame 18. The monochromatic laser source 13 can emit a scattering spectrum with consistent and continuous wavelength towards the lenses, ensuring that even nanoparticles can be effectively characterized.

[0058] To facilitate the transfer and discharge of liquid, an input pipe 14 is provided at one end of the first detection frame 18, and an output pipe 20 is provided at one end of the second detection frame 19. Liquid and particles enter the detection box 3 from the input pipe 14 and are discharged from the output pipe 20 after entering. After being discharged, they flow back into the mixing tank 5.

[0059] In order to adjust the flow rate of liquid and particles in the first detection frame 18 and the second detection frame 19 without changing the power and model of the electromagnetic circulation pump 11, so that the flow rate matches the amount of silicon powder added, such as... Figure 4 , Figure 6 and Figure 8 As shown, three first connecting pipes 16 are arranged around the input pipe 14 and the first detection frame 18, and three second connecting pipes 17 are arranged around the other end between the first detection frame 18 and the second detection frame 19. The three first connecting pipes 16 and the three second connecting pipes 17 are evenly distributed around each other, and the included angle between two adjacent first connecting pipes 16 and two adjacent second connecting pipes 17 is 120°. The two ends of the first connecting pipe 16 are respectively connected to the input pipe 14 and the first detection frame 18 through slots, and the second connecting pipes 17 are connected to the first detection frame 18 and the second detection frame 19 through slots. Through the splicing of the first connecting pipes 16 and the second connecting pipes 17, the liquid can flow and be detected in the detection box 3 according to the trajectory of the input pipe 14, the first connecting pipe 16, the first detection frame 18, the second connecting pipe 17, the second detection frame 19 and the output pipe 20.

[0060] In addition, the liquid flow diameters inside the three first connecting pipes 16 and the three second connecting pipes 17 increase sequentially. By adjusting the liquid flow diameters inside the first connecting pipes 16 and the second connecting pipes 17, the speed of the liquid entering the first detection frame 18 and the second detection frame 19 can be adjusted so that the flow speed matches the weight of the added silicon micro powder. The three first connecting pipes 16 are fixedly connected by the first connecting block 15, and the three second connecting pipes 17 are fixedly connected by the second connecting block 24. Subsequently, the motor drives and moves the center position of the first connecting block 15 and the second connecting block 24 to adjust the first connecting pipes 16 and the second connecting pipes 17.

[0061] To facilitate adjustment of the first connecting pipe 16 and the second connecting pipe 17, and to prevent adjustments from affecting the normal operation of the flow trajectory inside the detection box 3, such as... Figure 3 As shown, a stepping motor is provided at one end of the second connecting block 24 and the first connecting block 15. A recessed sliding rail 32 is provided laterally at the upper end of the inside of the detection box 3. The outer wall of the stepping motor extends toward the sliding rail 32 and slides into the sliding rail 32. A first hydraulic rod 26 is provided at one end of the second connecting block 24 and the first connecting block 15 corresponding to the stepping motor. The extension and retraction of the first hydraulic rod 26 can push the stepping motor and the connected first connecting pipe 16 and second connecting pipe 17 to slide laterally along the sliding rail 32. The lateral sliding causes the first connecting pipe 16 and the second connecting pipe 17 to separate from the corresponding connected first detection frame 18 and second detection frame 19 before adjustment. The first hydraulic rod 26 is stored inside the sliding rail 32.

[0062] To facilitate the disassembly and replacement of the first connecting tube 16, and to allow for the replacement of first connecting tubes 16 with different diameters to meet testing requirements (since the required diameter of the first connecting tube 16 varies considerably depending on the weight of the test particles, the diameter of the first connecting tube 16 can be made in different ranges for installation and replacement as needed), and also to facilitate the handling of residual liquid inside the first connecting tube 16, such as... Figure 7As shown, the first connecting block 15 includes a central shaft 151 and three connectors 152. The central shaft 151 is connected to a stepper motor drive. A single first connecting tube 16 is respectively installed on the three connectors 152. The connector 152 includes a sleeve 1521 and a connecting part 1522. The sleeve 1521 is fixed to the side wall of the central shaft 151 through the connecting part 1522. The first connecting tube 16 is clamped in the sleeve. The sleeve is semi-circular. Both ends of the arc of the sleeve 1521 are slidably provided with openable arc plates 1523. The sliding directions of the two arc plates 1523 are opposite. One end of the two arc plates 1523 is slidably disposed in the sleeve 1521, and the other end is fixedly provided with a support block 1524. The inner side wall of the support block 1524 is concentric with the inner side wall of the sleeve 1521 and has the same diameter. The connecting part 152... The interior of component 2 is mirror-shaped, containing two sets of drive assemblies 40 for controlling the opening and closing of the arc-shaped plates 1523. Each drive assembly 40 includes a micro-motor 41, a drive shaft 42, and two connecting rods 43. The two connecting rods 43 are respectively located at both ends of the drive shaft 42. The micro-motor 41 is a dual-axis motor to simultaneously drive both sets of connecting rods 43. The drive shaft 42 is rotatably connected to the micro-motor 41, and drive discs are located at both ends of the drive shaft 42. One end of each connecting rod 43 is rotatably connected to a drive disc, and the other end is rotatably connected to a corresponding arc-shaped plate 1523. The two micro-motors 41 rotate in opposite directions, causing the two connecting rods 43 to drive the two arc-shaped plates 1523 to slide in opposite directions, thereby controlling the opening and closing of the two arc-shaped plates 1523. This technical solution has a high degree of intelligence and a wider range of applications.

[0063] In order to prevent the input pipe 14 from affecting the rotation and replacement of the first connecting pipe 16, a second hydraulic rod 31 is provided on one side of the connection position between the input pipe 14 and the first connecting pipe 16. The two ends of the second hydraulic rod 31 are fixedly connected to the external parts of the detection box 3 and the input pipe 14, respectively. The input pipe 14 and the first connecting pipe 16 can be separated by the contraction of the input pipe 14. The extension distance of the first hydraulic rod 26 is less than the extension distance of the second hydraulic rod 31. After the second hydraulic rod 31 and the first hydraulic rod 26 contract at the same time, it is possible to prevent objects from colliding with the first connecting pipe 16 and the second connecting pipe 17 and affecting the rotation of the first connecting pipe 16 and the second connecting pipe 17.

[0064] To prevent liquid remaining inside the first connecting pipe 16 and the second connecting pipe 17 from spilling out during replacement and becoming difficult to collect, a collection box 4 is provided at the lower end of the detection box 3. The side of the collection box 4 facing the detection box 3 has a discharge port 21 that penetrates the lower end of the detection box 3. Liquid remaining inside the first connecting pipe 16 and the second connecting pipe 17 will drip through the discharge port 21 and fall into the collection box 4.

[0065] To facilitate material delivery, a stirring tank 5 is provided on one side of the front end of the detection box 3. A stirrer 10 is provided inside the stirring tank 5. The stirrer 10 can stir the liquid and add the silicon micro powder inside, which facilitates the delivery of materials. The stirring tank 5 is sealed to the output pipe 20. The input pipe 14 is sealed to the stirring tank 5 through an electromagnetic circulation pump 11. By starting the electromagnetic circulation pump 11, the liquid can be drawn from the stirring tank 5, detected in the detection box 3, and then flowed back into the stirring tank 5.

[0066] Among them, such as Figure 9 As shown, one side of the stirrer 10 is embedded in the outer wall of the mixing tank 5 and is slidably connected to the outer wall of the mixing tank 5. A first threaded rod 27 is provided through the middle of the sliding position of the stirrer 10 and the mixing tank 5, and the outside of the first threaded rod 27 is threadedly engaged with the through position of the stirrer 10. When silicon powder is added, the stirrer 10 is exposed at the upper end of the mixing tank 5 after the first threaded rod 27 rotates and is pushed vertically upward, which facilitates the addition of materials.

[0067] In addition, a support 6 is provided on one side of the mixing tank 5, a fixed frame 8 is provided at the upper end of the support 6, and an electronic scale 7 is provided on the side of the support 6 facing the fixed frame 8. The weight of the material placed inside the fixed frame 8 can be measured by the electronic scale 7.

[0068] like Figure 10 As shown, in order to fix the container outside the silicon powder inside the fixing frame 8 and the upper end of the electronic scale 7, clamping blocks 30 are provided at both ends inside the fixing frame 8. Second threaded rods 29 are provided through both sides inside the clamping blocks 30, and the outside of the second threaded rods 29 are threadedly engaged with the through position of the clamping blocks 30. After the weight of the container and the contents inside the container is measured by the electronic scale 7, the second threaded rods 29 are driven to rotate. The rotation of the second threaded rods 29 can cause the pair of clamping blocks 30 to move relative to each other and clamp the outer wall of the container. The second threaded rods 29 are bidirectional threaded rods.

[0069] One side of the fixed frame 8 is rotatably connected to the upper end of the support 6. By rotating, the fixed frame 8 can be flipped over and the container held inside can be tilted, so that the container pours the silicon powder inside into the mixing tank 5 for stirring.

[0070] To facilitate cleaning of the mixing tank 5, the input pipe 14, the first connecting pipe 16, the first detection frame 18, the second connecting pipe 17, the second detection frame 19, and the output pipe 20 after measurement, the external cleaning liquid can be sent into the mixing tank 5 through the connecting pipe 28. The liquid in the mixing tank 5 and the material transferred during the previous test are discharged into the collection box 4 through the discharge port 21 after the input pipe 14 and the first connecting pipe 16 are separated.

[0071] like Figure 1 , Figure 2 and Figure 11 As shown, the front end of the detection box 3 is equipped with a touch terminal 2. The touch terminal 2 has a built-in detection system for assisting in the detection of particle size distribution control of ultrafine high-purity spherical silicon micropowder. The detection system includes a reset module, a weight extraction module, a calculation module, an adjustment module, and a detection module. Among them, the weight extraction module is used to extract the weight of silicon micropowder detected by the electronic scale 7. When the container is placed on the surface of the electronic scale 7 alone, it does not need to be detected by the electronic scale 7. However, after the container is placed on the surface of the electronic scale 7, when the user manually puts the silicon micropowder into the container placed on the top of the electronic scale 7, the change in weight is detected by the electronic scale 7. The change in weight is the weight of the silicon micropowder.

[0072] The calculation module is used to determine the type of first connecting pipe 16 and second connecting pipe 17 to use by calculating with the formula and using the data extracted by the weight extraction module. It also determines the number of clockwise rotation steps of the motor at one end of the second connecting block 24 and the first connecting block 15, and adjusts the position of the first connecting pipe 16 and second connecting pipe 17 based on the calculation results. The adjustment of the diameter of the connection between the first connecting pipe 16 and second connecting pipe 17 and the input pipe 14, the first detection frame 18 and the second detection frame 19 directly adjusts the flow speed, avoiding the material flow speed being too slow to detect when a large amount of material is added, and also avoiding the material flow speed being too fast to detect when a small amount of material is added.

[0073] The calculation formula in the above calculation module is as follows:

[0074]

[0075] In the above formula, Hx is the unit step function:

[0076]

[0077] In the above calculation formula, W is the weight of the material to be tested extracted by the weight extraction module, in g; W1 is the boundary threshold between the weight of the material to be tested corresponding to the large-diameter first connecting pipe 16 and the second connecting pipe 17 and the medium-diameter first connecting pipe 16 and the second connecting pipe 17, in g; W2 is the boundary threshold between the weight of the material to be tested corresponding to the medium-diameter first connecting pipe 16 and the second connecting pipe 17 and the small-diameter first connecting pipe 16 and the second connecting pipe 17, in g.

[0078] θ1 is the angle of the large-diameter first connecting pipe 16 and the second connecting pipe 17 corresponding to the stepping motor, in degrees; θ2 is the angle of the medium-diameter first connecting pipe 16 and the second connecting pipe 17 corresponding to the stepping motor, in degrees; θ3 is the angle of the small-diameter first connecting pipe 16 and the second connecting pipe 17 corresponding to the stepping motor, in degrees.

[0079] α is the step angle of the stepper motor, in degrees per step;

[0080] N is the number of pulses required to drive the motor, in steps. The calculated N can be used to give the adjustment module a start signal to adjust the angle of the first connecting pipe 16 and the second connecting pipe 17 so that the diameter of the first connecting pipe 16 and the second connecting pipe 17 corresponds to the weight of the material being transmitted.

[0081] For example, when the weight of silicon powder in the measuring container is 30g, the dividing threshold between the large-diameter and medium-diameter connecting pipes corresponding to the weight of the material to be measured is 50g, the dividing threshold between the medium-diameter and small-diameter connecting pipes corresponding to the weight of the material to be measured is 100g, the angle of the stepping motor corresponding to the large-diameter connecting pipe is 0°, the angle of the stepping motor corresponding to the medium-diameter connecting pipe is 120°, and the angle of the stepping motor corresponding to the small-diameter connecting pipe is 240°; when the step angle of the stepping motor corresponding to the first connecting block 15 and the second connecting block 24 is 1.8 degrees / step;

[0082] The symbols in the formula correspond to the following data: W = 30; W1 = 50; W2 = 100; θ1 = 0; θ2 = 120; θ3 = 240; α = 1.8;

[0083] Substituting the numerical values ​​corresponding to the symbols into the formula, the calculation results are as follows:

[0084]

[0085] The results of further calculations based on the unit step function H(x) are as follows:

[0086]

[0087] Calculations show that when the weight of silicon powder added is 30g, the number of pulses required by the advancing motor is 0.

[0088] For example, when the weight of silicon powder in the measuring container is 80g, the dividing threshold between the large-diameter and medium-diameter connecting pipes and the weight of the material to be measured is 50g, the dividing threshold between the medium-diameter and small-diameter connecting pipes and the weight of the material to be measured is 100g, the angle of the stepping motor corresponding to the large-diameter connecting pipe is 0°, the angle of the stepping motor corresponding to the medium-diameter connecting pipe is 120°, and the angle of the stepping motor corresponding to the small-diameter connecting pipe is 240°; when the step angle of the stepping motor corresponding to the first connecting block 15 and the second connecting block 24 is 1.8 degrees / step;

[0089] The symbols in the formula correspond to the following data: W = 80; W1 = 50; W2 = 100; θ1 = 0; θ2 = 120; θ3 = 240; α = 1.8;

[0090] Substituting the numerical values ​​corresponding to the symbols into the formula, the calculation results are as follows:

[0091]

[0092] The results of further calculations based on the unit step function H(x) are as follows:

[0093]

[0094] Calculations show that when the weight of silicon powder added is 80g, the number of pulses required by the stepping motor is 67.

[0095] The adjustment module is used to rotate and adjust the first connecting block 15 and the second connecting pipe 17 based on the data calculated by the calculation module. Before adjustment, a contraction signal is given to the second hydraulic rod 31 to separate the input pipe 14 from the first connecting pipe 16. Then, the two first hydraulic rods 26 are activated simultaneously to separate the first connecting pipe 16 from the first detection frame 18 and the second connecting pipe 17 from the first detection frame 18 and the second detection frame 19. After separation, the pulse steps of the upper stepping motor of the second connecting block 24 and the first connecting block 15 are calculated by the calculation module, and a start signal for the corresponding pulse steps is given to the stepping motor. After rotating and adjusting the angle of the second connecting pipe 17 and the first connecting pipe 16, the pulse motor fixes the second connecting pipe 17 and the first connecting pipe 16 at the adjusted angle. Then, an extension signal is given to the first hydraulic rod 26 and the second hydraulic rod 31 to push and restore the connection between the input pipe 14, the first connecting pipe 16, the first detection frame 18, the second connecting pipe 17 and the second detection frame 19.

[0096] The detection module is used to activate the digital camera 12 to capture and extract data of the liquid flowing at the second detection frame 19 and the particles in the liquid. At the same time, it is used to activate the monochromatic laser source 13 to characterize and detect the liquid flowing at the first detection frame 18 and the particles in the liquid through the first detection frame 18. The detection at both positions completes the detection of the particle size distribution regulation of silicon micropowder.

[0097] The reset module is used to rotate the adjusted first connecting pipe 16 and first connecting block 15 in the opposite direction of the adjustment steps of the adjustment module after the detection is completed and the internal cleaning of the device is completed, so as to restore them to the state before adjustment. This makes it convenient for subsequent reuse and adjustment of the corresponding diameter of the first connecting pipe 16 and first connecting block 15 according to the amount of material subsequently added.

[0098] To facilitate the rapid and intelligent selection of the matching first connecting pipe 16 after the weight of the silicon powder is detected at position 7 of the electronic scale, this invention, based on a weight extraction module, a calculation module, and an adjustment module, employs the following steps to determine the target liquid flow orifice diameter and controls the stepper motor to rotate, thereby driving the first hydraulic rod 26 to rotate the first connecting block 15 to the first connecting pipe 16 corresponding to the target liquid flow orifice diameter:

[0099] The liquid flow ports of the three pre-set first connecting pipes 16 are respectively the first diameter, the second diameter, and the third diameter;

[0100] The weight extraction module performs the following steps:

[0101] Based on the current weight of the silicon powder weighed by the electronic scale 7, the silicon powder is put into the mixing tank 5 and stirred to form a flowing liquid. A preset flow time is set for the entire flow process from the input pipe 14 through the first connecting pipe 16, the first detection box 18, the second connecting pipe 17, the second detection box 19 and then out of the output pipe 20.

[0102] The computing module performs the following steps:

[0103] Based on the length of the flowing liquid throughout the entire flow process and the preset flow time, the estimated flow velocity of the flowing liquid is calculated.

[0104] Based on the current weight and density of the silica powder and the preset flow time, the flow rate of the liquid is calculated. The formula for calculating the flow rate of the liquid is as follows:

[0105]

[0106] Where Q represents the flow rate of the moving liquid in cubic meters per second, m represents the current weight of the silicon powder in kilograms, ρ represents the density of the silicon powder, and t represents time in seconds.

[0107] The estimated cross-sectional area of ​​the first connecting pipe 16 is calculated based on the flow rate and estimated velocity of the flowing liquid.

[0108] The estimated target diameter of the first connecting pipe 16 is calculated based on the estimated cross-sectional area of ​​the pipe. The liquid flow diameter closest to the estimated target diameter of the first connecting pipe (16) is selected as the target liquid flow diameter.

[0109] The adjustment module performs the following steps: After obtaining the target liquid flow diameter of the first connecting pipe 16, the adjustment module controls the stepper motor to move and drives the first hydraulic rod 26 to rotate the first connecting block 15 to the first connecting pipe 16 corresponding to the target liquid flow diameter, and then connects the two ends of the first connecting pipe 16 with the corresponding diameter to the input pipe 14 and the slot of the first detection frame 18 respectively.

[0110] In the above technical solution, the estimated flow velocity is calculated by dividing the length of the flowing liquid throughout the entire flow process by the preset flow time, and then converting the length of the entire flow process into a straight line length for calculation.

[0111] In the above technical solution, the estimated cross-sectional area of ​​the first connecting pipe 16 can be calculated by dividing the flow rate of the flowing liquid by the estimated flow velocity.

[0112] In the above technical solution, the estimated target diameter of the first connecting pipe 16 can be calculated according to the following formula: Where d is the target diameter value and A is the estimated pipe cross-sectional area value;

[0113] The principle and effect of the above technical solution are as follows: Since the weight of silicon micropowder varies during the testing process, different diameter first connecting pipes 16 need to be selected for different weights of silicon micropowder each time. Relying on manual judgment would introduce errors and affect the efficiency of the process. This invention uses a weight extraction module to receive the weight value from the electronic scale 7 in real time. A calculation module then determines the target liquid flow diameter according to calculation steps. The target liquid flow diameter value is variable and irregular. During the selection process, an adjustment module stores the pre-set values ​​of the first, second, and third diameters in its storage and compares them with the obtained target liquid flow diameter value. The first connecting pipe 16 with the diameter closest to the target liquid flow diameter value is selected. Simultaneously, the adjustment module controls the stepper motor to rotate, causing the first hydraulic rod 26 to rotate the first connecting block 15 to the first connecting pipe 16 corresponding to the target liquid flow diameter. This technical solution improves intelligence and accuracy, and increases work efficiency.

[0114] The working principle of this invention is as follows: When using the device to detect the particle size distribution of silicon micropowder, a container is placed inside the fixed frame 8 and above the electronic scale 7. The electronic scale 7 is started, and the material to be tested is placed in the container. The weight of the material is measured by the electronic scale 7. Based on the weight, the required pipe diameter is determined. Two first connecting blocks 15 are activated, which respectively drive the corresponding first connecting block 15 and second connecting pipe 17 to rotate. The rotation is adjusted to the required angle. After adjusting the angle, the first hydraulic rod 26 is activated. The extension of the first hydraulic rod 26 can push the first connecting block 15 to connect with the first detection frame 18, while the pushing of the second connecting pipe 17 connects with the first detection frame 18 and the second detection frame 19. The second hydraulic rod 31 is activated, which pushes the input pipe 1. 4 is connected to the first connecting pipe 16. The rotation of the first threaded rod 27 causes the stirrer 10 to move longitudinally and expose the upper end of the mixing tank 5. The rotation of the second threaded rod 29 causes the clamping block 30 to clamp the container. The fixing frame 8 flips over towards the mixing tank 5 at the upper end of the support 6 and pours out the silicon powder. The stirrer 10 resets and stirs the liquid and silicon powder inside the mixing tank 5. The material and liquid inside the mixing tank 5 are drawn out by the electromagnetic circulation pump 11 and sent to the input pipe 14. The liquid inside the input pipe 14 is transmitted along the first connecting pipe 16, the first detection frame 18, the second connecting pipe 17, the second detection frame 19 and the output pipe 20 and finally flows back to the mixing tank 5. When the particles and liquid flow to the positions of the first detection frame 18 and the second detection frame 19, they are photographed and detected by the monochrome laser source 13 and the digital camera 12, respectively.

[0115] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0116] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder, comprising a base (1), wherein a detection box (3) is disposed on one side of the upper end of the base (1), characterized in that, The detection box (3) has a first detection frame (18) and a second detection frame (19) arranged longitudinally in the middle. One end of the first detection frame (18) has an input pipe (14), and one end of the second detection frame (19) has an output pipe (20). Three first connecting pipes (16) with progressively increasing liquid flow diameters are arranged around the input pipe (14) and the first detection frame (18). Three second connecting pipes (17) with progressively increasing liquid flow diameters are arranged at the other end between the first detection frame (18) and the second detection frame (19). The front of the detection box (3)... A mixing tank (5) and a support (6) are arranged sequentially on one side of the end. An electronic scale (7) and a fixing frame (8) are arranged sequentially on the upper end of the support (6). The three first connecting pipes (16) are fixedly connected by a first connecting block (15), and the three second connecting pipes (17) are fixedly connected by a second connecting block (24). A stepping motor is provided at one end of both the second connecting block (24) and the first connecting block (15). A sliding rail (32) is provided at the upper end of the inside of the detection box (3). The outer wall of the stepping motor slides and is embedded in the sliding rail (32). The second connecting block ( 24) A first hydraulic rod (26) is provided at one end of the first connecting block (15) corresponding to the progress motor. A second hydraulic rod (31) is provided on one side of the connection position between the input pipe (14) and the first connecting pipe (16). The two ends of the second hydraulic rod (31) are fixedly connected to the outside of the detection box (3) and the input pipe (14), respectively. The first connecting block (15) includes a central shaft (151) and three connectors (152). The connector (152) includes a sleeve (1521) and a connecting part (1522). The sleeve (1521) is provided with two openable arcs. The connecting part (1522) of the shaped plate (1523) has two sets of drive components (40) that control the opening and closing of the two shaped plates (1523) respectively. The drive components (40) include a micro motor (41), a drive shaft (42) and two connecting rods (43). The drive shaft (42) is rotatably connected to the micro motor (41). The two ends of the drive shaft (42) are provided with drive disks. One end of the connecting rod (43) is rotatably connected to the drive disk, and the other end of the connecting rod (43) is rotatably connected to the corresponding shaped plate (1523).

2. The detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder according to claim 1, characterized in that, The mixing tank (5) is equipped with a stirrer (10) inside. One side of the stirrer (10) is embedded in the outer wall of the mixing tank (5) and is slidably connected to the outer wall of the mixing tank (5).

3. The detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder according to claim 1, characterized in that, Both ends of the fixed frame (8) are provided with clamping blocks (30), and the two sides of the clamping blocks (30) are provided with second threaded rods (29), and the outside of the second threaded rods (29) is threadedly engaged with the through position of the clamping blocks (30).

4. The detection device for controlling the particle size distribution of ultrafine high-purity spherical silica powder according to claim 3, characterized in that, One side of the fixed frame (8) is rotatably connected to the upper end inside the bracket (6).

5. The detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder according to claim 1, characterized in that, The lower end of the detection box (3) is provided with a collection box (4), and the side of the collection box (4) facing the detection box (3) is provided with a material discharge port (21) that penetrates the lower end of the interior of the detection box (3).

6. The detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder according to claim 5, characterized in that, The front end of the detection box (3) is provided with a touch terminal (2). The touch terminal (2) has a built-in detection system for assisting in the detection of particle size distribution regulation of ultrafine high-purity spherical silicon micropowder, and is composed of a reset module, a weight extraction module, a calculation module, an adjustment module, and a detection module. The weight extraction module is used to extract the weight of silicon powder detected by the electronic scale (7); The calculation module is used to calculate the number of clockwise rotation steps of the motor at one end of the second connecting block (24) and the first connecting block (15) by combining the data extracted by the weight extraction module with the formula calculation. The adjustment module is used to rotate and adjust the first connecting block (15) and the second connecting pipe (17) based on the data calculated by the calculation module, and to give the second hydraulic rod (31), the two first hydraulic rods (26), the second connecting block (24) and the upper step motor of the first connecting block (15) a start signal; The detection module is used to capture images and extract data of the liquid flowing at the position of the second detection box (19) and the particles in the liquid, and to characterize and detect the liquid flowing at the position of the first detection box (18) and the particles in the liquid through the first detection box (18). The reset module is used to restore the first connecting pipe (16) and the first connecting block (15) to their original state after the detection is completed and the internal cleaning of the device is finished.

7. The detection device for controlling the particle size distribution of ultrafine high-purity spherical silicon micropowder according to claim 6, characterized in that, Based on the weight extraction module, calculation module, and adjustment module, the target liquid flow orifice diameter is determined using the following steps, and the stepper motor is controlled to rotate, driving the first hydraulic rod (26) to rotate the first connecting block (15) to the first connecting pipe (16) corresponding to the target liquid flow orifice diameter: The liquid flow ports of the three first connecting pipes (16) are preset to be a first diameter, a second diameter, and a third diameter, respectively; The weight extraction module performs the following steps: Based on the current weight value of the silicon powder weighed by the electronic scale (7), the silicon powder is put into the mixing tank (5) and stirred to form a flowing liquid. A preset flow time is set for the entire flow process from the input pipe (14) through the first connecting pipe (16), the first detection box (18), the second connecting pipe (17), the second detection box (19) and then out of the output pipe (20). The computing module performs the following steps: Based on the length of the flowing liquid throughout the entire flow process and the preset flow time, the estimated flow velocity of the flowing liquid is calculated. Based on the current weight and density of the silica powder and the preset flow time, the flow rate of the liquid is calculated. The formula for calculating the flow rate of the liquid is as follows: in, The flow rate of the moving liquid is expressed in cubic meters per second (m), and the current weight of the silica powder is expressed in kilograms (kg). The value represents the density of the silicon micropowder, and t represents time in seconds. The estimated cross-sectional area of ​​the first connecting pipe (16) is calculated based on the flow rate and estimated velocity of the flowing liquid. The estimated target diameter of the first connecting pipe (16) is calculated based on the estimated cross-sectional area of ​​the pipe, and the liquid flow diameter closest to the estimated target diameter of the first connecting pipe (16) is selected as the target liquid flow diameter. The adjustment module performs the following steps: after obtaining the target liquid flow diameter of the first connecting pipe (16), the adjustment module controls the stepper motor to move and drives the first hydraulic rod (26) to rotate the first connecting block (15) to the first connecting pipe (16) corresponding to the target liquid flow diameter.

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