Uniform sand conveying device for superfine micro powder

Abstract

The invention provides a superfine micro-powder uniform sand conveying device, and relates to the technical field of electrostatic sand planting raw material conveying, the superfine micro-powder uniform sand conveying device comprises a mounting assembly, a grinding feeding mechanism, a spiral conveying mechanism and a controller, the spiral conveying mechanism in the left-right direction is fixedly arranged at the top of the right side of the mounting assembly, and the grinding feeding mechanism is fixedly arranged on the top of the right side of the mounting assembly; the grinding and feeding mechanism is fixedly arranged at the input end of the top of the right side of the spiral conveying mechanism, the grinding and feeding mechanism and the spiral conveying mechanism are electrically connected with the controller, and grinding, conveying and sand planting of superfine micro powder are integrated through the integrated structural design. The grinding feeding mechanism guides powder into the spiral conveying mechanism, the controller synchronously drives the material stirring wheel and the rotating shaft, the material stirring wheel adjusts the discharging speed, the rotating shaft pushes the powder through a spiral blade, and the middle-section grinding hammer head conducts secondary crushing on the agglomerated powder. A spiral conveying mechanism is used for replacing a traditional airflow conveying mode, and the possibility of particle blocking is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic sand planting raw material transportation, in particular to an ultra-fine micro powder uniform sand transportation device. Background Art

[0002] In the field of ultra-fine powder processing, material conveying uniformity, grinding efficiency and equipment stability are key factors restricting product quality and production efficiency. Traditional conveying devices have the following technical bottlenecks: Insufficient conveying uniformity: Conventional mechanical or pneumatic conveying methods are prone to uneven conveying density due to factors such as differences in powder fluidity and fluctuations in pipeline resistance, manifesting as periodic powder clouds or flow fluctuations. For example, in carbon nanotube production, uncontrolled powder flow rate can directly lead to abnormal catalyst distribution within the reaction chamber, affecting the consistency of nanotube growth.

[0003] The grinding and conveying systems are separated: the existing processes mostly use independent grinding equipment and conveying devices in series, which increases the risk of contamination in the intermediate buffer link. For example, calcium oxide powder easily absorbs moisture and clumps during transportation; the grinding particle size and conveying efficiency are difficult to dynamically match, and the parameters need to be repeatedly adjusted, which reduces the flexibility of the production line.

[0004] Powder blockage and electrostatic adsorption: Ultrafine powders (such as silicon powder with a particle size of <10μm) are prone to pipeline blockage during transportation. Due to the enhanced interaction between particles, deposition is easily formed in elbows or low-speed sections, requiring frequent shutdowns for cleaning. Low integration between screening and conveying: The traditional process requires transferring the conveyed powder to an independent vibrating screen, which has the defect of destroying the uniformity of particle size distribution during the transfer process.

[0005] Lack of thermal management: The heat generated by the grinding process accumulates in the closed conveying pipeline, causing the powder temperature to rise. Summary of the Invention

[0006] The present invention provides an ultra-fine micropowder uniform sand conveying device, which is used to solve at least one of the technical problems raised by the above background technology.

[0007] In order to solve the above technical problems, the present invention provides an ultra-fine micropowder uniform sand conveying device, comprising: an installation component, a grinding and feeding mechanism, a spiral conveying mechanism and a controller, wherein a spiral conveying mechanism is fixedly provided on the top right side of the installation component along the left and right directions, the grinding and feeding mechanism, and the grinding and feeding mechanism are fixedly provided on the input end of the top right side of the spiral conveying mechanism, and the grinding and feeding mechanism and the spiral conveying mechanism are electrically connected to the controller respectively.

[0008] Preferably, the installation assembly includes: a base plate, a first support frame, and a second support frame. The first support frame is fixedly installed on the top right side of the base plate, and the electrostatic sand planting box is fixedly installed on the top left side of the base plate. The second support frame is fixedly installed below the electrostatic sand planting box and the first support frame.

[0009] Preferably, the spiral conveying mechanism includes: a conveying pipe, a conveying pipe fixedly installed along the left and right directions on the top of the first support frame, the bottom outlet end on the left side of the conveying pipe is fixedly connected to a vertical discharge pipe, a feed port is fixedly opened on the right top of the conveying pipe, a rotating shaft rotatably connected along the left and right directions is fixedly provided in the conveying pipe, a plurality of grinding hammers are fixedly provided in the middle section of the rotating shaft, a plurality of spiral blades are fixedly connected to the left and right sections of the rotating shaft, a heat dissipation water tank is fixedly installed on the top of the conveying pipe, the right end axis of the rotating shaft is fixedly connected to a double pulley, and a driving motor is fixedly installed on the left top of the conveying pipe.

[0010] Preferably, a heat dissipation water tank is fixedly installed on the top of the conveying pipe, and a number of heat dissipation fins are fixedly installed on the heat dissipation water tank. A pulley is fixedly installed on the right end of the driving motor, and the pulley is connected to the double pulley through a belt. A belt conveyor along the left and right directions is fixed on the second support frame, and the right end of the belt is located below the discharge pipe. The left section of the belt conveyor extends into the electrostatic sand planting box, and an electrostatic field emission mechanism is provided inside the electrostatic sand planting box. The electrostatic sand planting box is rotatably connected to a mirror roller along the front and back directions.

[0011] Preferably, the grinding feeding mechanism includes: a vertical pipe, the top of the feed port is fixedly connected to the vertical pipe, the inner top of the vertical pipe is rotatably connected to the feed wheel, the right end of the feed wheel is fixedly connected to the third output shaft end of the motor, the top of the vertical pipe is fixedly connected to the grinding funnel, the top center of the grinding funnel is fixedly installed with a vertical driving motor 2, the top of the grinding funnel is symmetrically fixedly connected to a pair of feed hoppers, the top inner wall of the grinding funnel is fixedly connected to a number of radial fixed rods, the fixed rods are fixedly connected to the grinding cone near the center end of the grinding funnel, and the grinding cone is high in the center and low on the outside.

[0012] Preferably, the bottom output shaft of the driving motor 2 is fixedly connected to the vertical rotating shaft 1, and the rotating shaft 1 rotates from top to bottom in sequence to pass through the top wall of the grinding funnel and the grinding cone, the bottom of the rotating shaft 1 is fixedly connected to a plurality of stirring rods, and the top of the rotating shaft 1 is fixedly connected to the limit plate, and the rotating shaft 1 at the bottom of the limit plate is provided with a compression spring, and the bottom end of the compression spring is fixedly connected to the sleeve 1, and the sleeve 1 is connected to the rotating shaft 1 in an up and down sliding manner, and the sleeve 1 is connected to a pair of grinding rollers by symmetrical rotation. The grinding rollers are in rolling connection with the top conical surface of the grinding cone.

[0013] Preferably, a sand and gravel screening and subdivision mechanism is also provided below the discharge pipe 1, and the sand and gravel screening and subdivision mechanism includes: a vertical rod 1, the bottom end of the right side of the conveying pipe is fixedly connected to the bearing bracket, the bearing bracket is rotatably connected to the rotating shaft 2 in the left and right directions, the right end of the rotating shaft 2 is fixedly connected to the pulley 2, the double pulley is connected to the pulley 2 through the belt 2, the left end of the rotating shaft 2 is fixedly connected to the fan blade, the fan blade, the fan blade is provided with an air collecting tube outside, and the air collecting tube is fixedly connected to the bottom of the conveying pipe.

[0014] Preferably, the bottom left side of the conveying pipe is fixedly connected to a plurality of vertical rods 2, the bottom ends of the vertical rods 2 are fixedly connected to the baffle, the vertical rods 2 are slidably connected to the horizontal plate up and down, the outer sleeves of the vertical rods 2 between the horizontal plate 1 and the baffle are provided with springs 2, a screening box is fixedly installed on the bottom of the horizontal plate, the bottom of the conveying pipe is fixedly connected to bracket 1, a vibration motor is fixedly installed on the bottom of bracket 1, the front output shaft end of the vibration motor is fixedly connected to cam 1, the cam 1 presses the horizontal plate downward, and partitions 1 and 2 are fixedly provided on the left and right intervals of the bottom of the screening box respectively.

[0015] Preferably, an inclined screen 1 with a higher left and lower right is fixedly installed on the top of the left side wall of the screening box and the top of partition 1, and an inclined screen 2 with a higher left and lower right is fixedly installed on the top of partition 1 and the top of partition 2. The mesh of inclined screen 1 is smaller than that of inclined screen 2. The bottom wall of the screening box is located below inclined screen 1 and inclined screen 2 and is respectively provided with electric valve 1 and electric valve 2. A discharge valve is fixedly opened on the bottom right side of the screening box, and an air outlet is fixedly installed on the top of the right side wall of the screening box, and the air outlet is fixedly connected to the air collecting cylinder through an air supply pipe.

[0016] Preferably, a transportation abnormality state assessment and warning module is further provided, and the transportation abnormality state assessment and warning module includes: Temperature detection unit 1, used for real-time detection of the ambient temperature of the screw conveying mechanism; Temperature detection unit 2, used to detect the working temperature of the pipe wall of the conveying pipe in real time; Density sensor, used to detect the density of fine powder in the conveying pipe; Flow sensor, used to detect the sand and gravel flow value at the outlet of the conveying pipe; Alarm, used to give an alarm in case of abnormal situation; The first calculation module is used to calculate the abnormal state evaluation value of the mass flow rate of the screw conveying mechanism during the i-th detection ; A control unit, used to collect and process data from various sensors and detection units, the control unit being electrically connected to the first calculation module, temperature detection unit 1, temperature detection unit 2, density sensor, flow sensor, and alarm; The judgment unit compares, when When the value is greater than the safety threshold, the control unit controls the alarm to sound an alarm and promptly stops the operation of the drive motor 1, notifying the maintenance personnel to repair the spiral conveying mechanism and replace the spiral blades. When the value is less than or equal to the safety threshold, the deviation abnormality status assessment value is normal and no alarm is required.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a device for uniformly conveying sand for ultrafine powders, and the present invention realizes the integration of grinding, conveying and sand planting of ultrafine powders through an integrated structural design. The grinding and feeding mechanism introduces the powder into the spiral conveying mechanism, and the controller synchronously drives the feed wheel and the rotating shaft: the feed wheel adjusts the feeding rate, the rotating shaft propels the powder through the spiral blades, and the middle section grinding hammer performs secondary crushing on the agglomerated powder. The heat dissipation water tank and the heat dissipation fins constitute a thermal management system. The circulating coolant absorbs the grinding heat and maintains the temperature in the pipe ≤40°C to prevent heat-sensitive powder from thermally adhering to the pipe and clogging the pipe. The ground powder is discharged from the discharge pipe to the belt conveyor. After being transported to the electrostatic sand planting box, the mirror roller uses a high-voltage electrostatic field (10-15kV) to uniformly adsorb the powder on the surface of the substrate, completing the sand planting process.

[0018] Beneficial effects: Reduced clogging risk: A spiral conveyor replaces traditional airflow to reduce the possibility of particle blockage. Polishing the inner wall of the conveying pipe reduces particle adhesion. A uniform distribution device is installed at the sand outlet to evenly distribute the sand throughout the work area.

[0019] Shortened process chain: Grinding, conveying and sand planting functions are integrated into a single device, eliminating the powder transfer link, reducing the risk of dust pollution, and improving the compactness and automation level of the production line; Improved thermal stability: The heat sink and fins work together to precisely control the temperature inside the pipe, adapting to the conveying needs of heat-sensitive micropowders (such as resin-based powders) and avoiding pipe blockage caused by thermal adhesion; Optimized sand planting efficiency: The electrostatic sand planting box is directly connected to the belt conveyor, shortening the powder exposure time, reducing the risk of moisture absorption, and improving the substrate surface coverage and sand planting uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a front cross-sectional schematic diagram of an ultra-fine powder uniform sand conveying device of the present invention; Figure 2 It is a front cross-sectional schematic diagram of the grinding and feeding mechanism of the present invention; Figure 3 It is a front view schematic diagram of the sand and gravel screening and subdivision mechanism of the present invention.

[0022] Reference numerals: 1. Mounting assembly; 101. Bottom plate; 102. First support frame; 103. Second support frame; 2. Grinding feeding mechanism; 3. Screw conveying mechanism; 4. Conveying pipe; 5. Discharge pipe 1; 6. Feeding port; 7. Rotating shaft; 8. Grinding hammer; 9. Spiral blade; 10. Heat dissipation water tank; 11. Heat dissipation fin; 12. Double pulley; 13. Drive motor 1; 14. Pulley 1; 15. Belt 1; 16. Belt conveyor; 17. Electrostatic sand planting box; 18. Mirror roller; 19. Vertical pipe 1; 20. Digging wheel; 21. Motor 3; 22. Grinding hopper; 23. Drive motor 2; 24. Feed hopper; 25. Fixing rod; 26. Grinding cone; 27. Rotating 1. Shaft 1; 28. Stirring rod; 29. ​​Limit plate; 30. Compression spring; 31. Sleeve 1; 32. Grinding roller; 33. Bearing bracket; 34. Rotating shaft 2; 35. Pulley 2; 36. Belt 2; 37. Fan blade; 38. Air collector; 39. Vertical rod 2; 40. Baffle; 41. Horizontal plate; 42. Spring 2; 43. Screening box; 44. Bracket 1; 45. Vibration motor; 46. Cam 1; 47. Partition 1; 48. Partition 2; 49. Inclined screen 1; 50. Inclined screen 2; 51. Electric valve 1; 52. Electric valve 2; 53. Discharge valve; 54. Air outlet; 55. Air supply pipe; 56. Electrostatic field emission mechanism; 57. Controller. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides an ultra-fine powder uniform sand conveying device, such as Figure 1 As shown, an ultra-fine powder uniform sand conveying device includes: a mounting assembly 1, a grinding and feeding mechanism 2, a spiral conveying mechanism 3 and a controller 57. The mounting assembly 1 is fixed with a spiral conveying mechanism 3 along the left and right directions on the top right side. The grinding and feeding mechanism 2 and the spiral conveying mechanism 3 are fixed with a grinding and feeding mechanism 2 on the top right side input end. The grinding and feeding mechanism 2 and the spiral conveying mechanism 3 are electrically connected to the controller 57 respectively.

[0027] The working principle and beneficial effects of the above technical solution are: Working principle: The present invention achieves the integration of ultrafine powder grinding, conveying, and sanding through an integrated structural design. The grinding feed mechanism 2 introduces the powder into the spiral conveying mechanism 3, and the controller 57 synchronously drives the feed wheel 20 and the rotating shaft 7: the feed wheel 20 adjusts the feeding rate, the rotating shaft 7 propels the powder through the spiral blades 9, and the middle grinding hammer 8 performs secondary crushing on the agglomerated powder. The heat dissipation water tank 10 and the heat dissipation fins 11 constitute a thermal management system. The circulating coolant absorbs the grinding heat, maintains the temperature in the pipe ≤40°C, and prevents heat-sensitive powder from thermally adhering to the pipe and clogging the pipe. The ground powder is discharged through the discharge pipe 5 to the belt conveyor 16. After being transported to the electrostatic sanding box 17, the mirror roller 18 uses a high-voltage electrostatic field (10-15kV) to uniformly adsorb the powder on the surface of the substrate, completing the sanding process.

[0028] Beneficial effects: Reduced clogging risk: A spiral conveyor mechanism 3 replaces traditional airflow conveying to reduce the possibility of particle blockage. The inner wall of the conveying pipe 4 is polished to reduce particle adhesion. A uniform distribution device is installed at the sand outlet to evenly distribute the sand throughout the work area.

[0029] Shortened process chain: Grinding, conveying and sand planting functions are integrated into a single device, eliminating the powder transfer link, reducing the risk of dust pollution, and improving the compactness and automation level of the production line; Improved thermal stability: The heat sink 10 and the heat sink fins 11 work together to precisely control the temperature inside the pipe, adapting to the conveying requirements of heat-sensitive micropowders (such as resin-based powders) and avoiding pipe blockage caused by thermal adhesion; Optimized sand planting efficiency: The electrostatic sand planting box 17 is directly connected to the belt conveyor 16, shortening the powder exposure time, reducing the risk of moisture absorption, and improving the substrate surface coverage and sand planting uniformity.

[0030] Example 2 On the basis of Example 1, Figure 1 、 Figure 3 As shown, the installation component 1 includes: a base plate 101, a first support frame 102, and a second support frame 103. The first support frame 102 is fixedly installed on the top right side of the base plate 101, and the electrostatic sand planting box 17 is fixedly installed on the top left side of the base plate 101. The second support frame 103 is fixedly installed below the electrostatic sand planting box 17 and the first support frame 102.

[0031] The spiral conveying mechanism 3 includes: a conveying pipe 4, a conveying pipe 4 along the left and right directions is fixedly installed on the top of the first support frame 102, the bottom outlet end on the left side of the conveying pipe 4 is fixedly connected to a vertical discharge pipe 5, a feed port 6 is fixedly opened on the top right side of the conveying pipe 4, a rotating shaft 7 along the left and right directions is rotatably connected inside the conveying pipe 4, a plurality of grinding hammer heads 8 are fixedly provided in the middle section of the rotating shaft 7, a plurality of spiral blades 9 are fixedly connected to the left and right sections of the rotating shaft 7, a heat dissipation water tank 10 is fixedly installed on the top of the conveying pipe 4, the right end axis of the rotating shaft 7 is fixedly connected to a double pulley 12, and a drive motor 13 is fixedly installed on the top left side of the conveying pipe 4.

[0032] A heat dissipation water tank 10 is fixedly installed on the top of the conveying pipe 4, and a number of heat dissipation fins 11 are fixedly installed on the heat dissipation water tank 10. A pulley 14 is fixedly installed on the right end of the driving motor 13, and the pulley 14 is connected to the double pulley 12 through a belt 15. A belt conveyor 16 is fixedly provided along the left and right directions on the second support frame 103, and the right end of the belt is located below the discharge pipe 5. The left section of the belt conveyor 16 extends into the electrostatic sand planting box 17, and an electrostatic field emission mechanism 56 is provided inside the electrostatic sand planting box 17. The electrostatic sand planting box 17 is rotatably connected to a mirror roller 18 along the front and rear directions.

[0033] The working principle and beneficial effects of the above technical solution are: Working principle: Based on the integrated design of Example 1, power transmission and thermal management are further optimized. The driving motor 13 drives the rotating shaft 7 to rotate through the pulley 14 and the double pulley 12, realizing the synchronous operation of the spiral blade 9 and the grinding hammer 8. The left and right sections of the spiral blades 9 of the rotating shaft 7 form differential conveying through different pitches: the low speed (50-80rpm) on the right side propels the coarse powder, and the high speed (120-150rpm) on the left side refines the powder particle size distribution. The coolant in the heat dissipation water tank 10 circulates through the pipeline, and the heat dissipation fins 11 are in direct contact with the outer wall of the conveying pipe 4, reducing the pipe wall temperature through heat conduction. The belt conveyor 16 transports the powder discharged from the discharge pipe 5 to the electrostatic sand planting box 17. The chrome plating layer on the surface of the mirror roller 18 releases high-voltage static electricity, so that the powder is charged and then directionally adsorbed on the substrate to complete the sand planting.

[0034] Beneficial effects: Differential conveying optimization: The double-stage spiral blade 9 design realizes dynamic adjustment of powder particle size, avoiding blockage in the coarse powder section and improving uniformity in the fine powder section to meet different particle size requirements; Enhanced thermal management: The combination of the heat sink 10 and the heat sink fins 11 ensures stable pipe wall temperature, reduces the risk of conveying heat-sensitive materials, and extends equipment life. Directed adsorption by electrostatic field: The high-voltage electrostatic field of the mirror roller 18 realizes uniform sand planting of powder, improves the surface coverage of the substrate, and reduces manual intervention.

[0035] Example 3 On the basis of Example 2, Figure 1-Figure 3 As shown, the grinding feeding mechanism 2 includes: a vertical pipe 19, the top of the feed port 6 is fixedly connected to the vertical pipe 19, the inner top of the vertical pipe 19 is rotatably connected to the paddle wheel 20, the right end of the paddle wheel 20 is fixedly connected to the output shaft end of the motor 3 21, the top of the vertical pipe 19 is fixedly connected to the grinding funnel 22, the top center of the grinding funnel 22 is fixedly installed with a vertical driving motor 23, the top of the grinding funnel 22 is symmetrically fixedly connected to a pair of feeding hoppers 24, the top inner wall of the grinding funnel 22 is fixedly connected to a number of radial fixed rods 25, the fixed rods 25 are fixedly connected to the grinding cone 26 near the center end of the grinding funnel 22, and the grinding cone 26 is high in the center and low on the outside.

[0036] The output shaft at the bottom of drive motor 23 is fixedly connected to a vertical rotating shaft 1 27. Rotating shaft 1 27 rotates from top to bottom, sequentially penetrating the top wall of grinding hopper 22 and grinding cone 26. A plurality of stirring rods 28 are fixedly connected to the bottom of rotating shaft 1 27, and a limit plate 29 is fixedly connected to the top of rotating shaft 1 27. A compression spring 30 is mounted on the outer sleeve of rotating shaft 1 27 at the bottom of limit plate 29. The bottom end of compression spring 30 is fixedly connected to sleeve 1 31, which is vertically and slidably connected to rotating shaft 1 27. Sleeve 1 31 is symmetrically connected to a pair of grinding rollers 32, which are in rolling contact with the top conical surface of grinding cone 26. A horizontal rotation auxiliary limit mechanism is provided within sleeve 1 31 and rotating shaft 1 27.

[0037] The working principle and beneficial effects of the above technical solution are: Working principle: Based on Example 2, the grinding feeding mechanism 2 adopts rolling grinding and centrifugal feeding technology. The material enters the grinding funnel 22 from the feed hopper 24, the driving motor 23 drives the rotating shaft 27 to rotate, the stirring rod 28 performs preliminary dispersion of the powder, and the rotating shaft 27 drives the sleeve 31 to rotate. The clamping spring 30 presses the grinding roller 32 to the surface of the grinding cone 26 through the sleeve 31. The grinding roller 32 rolls along the conical surface under the combined action of centrifugal force and spring force, and performs high-pressure shear grinding on the powder. The structural design of the grinding cone 26 with a high center and a low outside makes the powder automatically gather to the edge of the cone under the action of centrifugation. The ground powder enters the spiral conveying mechanism 3 through the vertical pipe 19. The feed wheel 20 is driven by the motor 3 21, and the feeding speed is adjusted by frequency conversion control to achieve dynamic matching of grinding and conveying.

[0038] Beneficial effects: Energy-saving rolling grinding: The rolling friction design of the grinding roller 32 and the grinding cone 26 reduces the sliding friction energy consumption of traditional grinding and improves energy efficiency; Dynamic pressure compensation: The compression spring 30 realizes dynamic compensation of grinding pressure, adapting to the grinding requirements of powders with different hardness (such as corundum and silicon carbide) and improving grinding efficiency; Optimization of centrifugal feeding: The frustum structure combined with centrifugal action solves the problem of ultrafine powder (such as D97 < 10μm) sedimentation in the grinding chamber and improves feeding continuity.

[0039] Example 4 On the basis of Example 2, Figure 1 、 Figure 3As shown, a sand and gravel screening and subdivision mechanism is also provided below the discharge pipe 5, and the sand and gravel screening and subdivision mechanism includes: a vertical rod 1, the bottom end of the right side of the conveying pipe 4 is fixedly connected to the bearing bracket 33, the bearing bracket 33 is rotatably connected to the rotating shaft 2 34 in the left and right directions, the right end of the rotating shaft 2 34 is fixedly connected to the pulley 2 35, the double pulley 12 is connected to the pulley 2 35 through the belt 2 36, the left end of the rotating shaft 2 34 is fixedly connected to the fan blade 37, the fan blade 37, the fan blade 37 is provided with an air collecting tube 38 outside, and the air collecting tube 38 is fixedly connected to the bottom of the conveying pipe 4.

[0040] The bottom left side of the conveying pipe 4 is fixedly connected to a plurality of vertical rods 39, the bottom end of the vertical rods 39 is fixedly connected to a baffle 40, the vertical rods 39 are slid up and down to connect to a horizontal plate 41, a spring 42 is provided on the outer sleeve of the vertical rods 39 between the horizontal plate 41 and the baffle 40, a screening box 43 is fixedly installed on the bottom of the horizontal plate 41, the bottom of the conveying pipe 4 is fixedly connected to a bracket 44, a vibration motor 45 is fixedly installed on the bottom of the bracket 44, the front output shaft end of the vibration motor 45 is fixedly connected to a cam 46, the cam 46 presses the horizontal plate 41 downward, and a partition 47 and a partition 2 48 are fixedly provided on the left and right intervals at the bottom of the screening box 43.

[0041] An inclined screen 49 with a higher left side and a lower right side is fixedly mounted on the top of the left side wall of the screening box 43 and the top of the partition 1 47. An inclined screen 2 50 with a higher left side and a lower right side is fixedly mounted on the top of the partition 1 47 and the top of the partition 2 48. The inclined screen 1 49 has a smaller mesh size than the inclined screen 2 50. An electric valve 1 51 and an electric valve 2 52 are respectively provided on the bottom wall of the screening box 43 below the inclined screen 1 49 and the inclined screen 2 50. A discharge valve 53 is fixedly provided on the bottom right side of the screening box 43. An air outlet nozzle 54 is fixedly mounted on the top of the right side wall of the screening box 43. The air outlet nozzle 54 is fixedly connected to the air collecting cylinder 38 through an air supply pipe 55.

[0042] The working principle and beneficial effects of the above technical solution are: Working Principle: Based on Example 2, a sand and gravel screening and subdivision mechanism is added to achieve three-level classification of the powder. Rotating shaft 7 drives rotating shaft 2 34 via dual pulleys 12 and belt 2 36 . Fan blades 37 generate a directional airflow (at a speed of 2-4 m / s) within air collection tube 38 . This airflow enters screening box 43 through air supply duct 55 . A vibration motor 45 drives cam 1 46 to reciprocate and lift horizontal plate 41 . This resonates with baffle 40 via spring 2 42 , driving screening box 43 to vibrate reciprocally along vertical rod 2 39 . After powder enters screening box 43 , inclined screen 1 49 (30 μm mesh) intercepts coarse particles, while inclined screen 2 50 (10 μm mesh) separates fine powder. When air is discharged from outlet nozzle 54 , the lightest, finest sand and gravel powder is blown toward the surface of inclined screen 1 49 , while larger particles fall onto inclined screen 2 50 . The electric valve 1 51 and the electric valve 2 52 discharge the material according to the particle size, and the discharge valve 53 discharges the waste material, thereby realizing the accurate classification supply of the powder. At the same time, the vibration is conducive to the uniform distribution of powders of different particle sizes on the surface of the belt conveyor 16.

[0043] Beneficial effects: Airflow-assisted screening: Directed airflow increases the screening rate of fine powder, solves the technical problem of ultrafine powder easily clogging the screen, and improves screening efficiency; Three-stage grading system: Inclined screen 1 (49), inclined screen 2 (50) combined with airflow grading enables coarse screening, fine screening and ultra-fine grading to be completed in a single device, simplifying the process flow; Resonant vibration design: The elastic system composed of the vibration motor 45 and the spring 2 42 reduces the energy loss transmitted from the vibration to the host, improves the screening efficiency and reduces energy consumption.

[0044] Example 5 On the basis of Example 2, Figure 1-Figure 3 As shown, a transport abnormality status assessment and warning module is also provided, which includes: Temperature detection unit 1, used for real-time detection of the ambient temperature of the screw conveying mechanism 3; Temperature detection unit 2, used for real-time detection of the working temperature of the pipe wall of the delivery pipe 4; A density sensor for detecting the density of fine powder in the conveying pipe 4; A flow sensor is used to detect the sand and gravel flow rate at the outlet of the delivery pipe 4; Alarm, used to give an alarm in case of abnormal situation; A first calculation module is used to calculate an abnormal state evaluation value of the mass flow rate of the screw conveying mechanism 3 during the i-th detection; A control unit, used to collect and process data from various sensors and detection units, the control unit being electrically connected to the first calculation module, temperature detection unit 1, temperature detection unit 2, density sensor, flow sensor, and alarm; The first calculation module is based on the following formula: ;in: is the abnormal state evaluation value of the mass flow rate of the screw conveying mechanism 3 during the i-th detection, where i is a non-negative integer. is the average sand transport flow value detected by the flow sensor at time t, Take the value of pi as 3.14, is the filling rate of ultrafine powder particles in the conveying pipe 4 during the conveying process, is the slippage of ultrafine powder particles relative to the blade, The density sensor detects the density of the ultra-fine powder in the conveying pipe 4. is the edge diameter of the spiral blade 9, The wear variable of spiral blade 9 is set to 0.95. is the diameter of the rotating axis, is the thickness of the spiral blade 9, c is the gap between the spiral blade 9 and the wall of the conveying pipe 4, is a logarithmic function, The value of the natural constant is 2.72; is the ambient temperature value of the screw conveying mechanism 3 detected by the temperature detection unit 1, The operating temperature value of the pipe wall of the delivery pipe 4 detected by the temperature detection unit 2; is the maximum allowable operating temperature of the delivery pipe 4, is the minimum allowable operating temperature value of the delivery pipe 4; The judgment unit compares, when When the value is greater than the safety threshold, the control unit controls the alarm to sound an alarm and promptly stops the driving motor 1, notifying the maintenance personnel to repair the screw conveying mechanism 3 and replace the screw blade 9. When the value is less than or equal to the safety threshold, the deviation abnormality status assessment value is normal and no alarm is required.

[0045] The working principle and beneficial effects of the above technical solution are: Working principle: Based on Example 2, an abnormal state assessment and early warning module for conveying is added to realize real-time monitoring of equipment status and fault early warning. Temperature detection unit 1 and temperature detection unit 2 monitor the ambient temperature and pipe wall temperature in real time, flow sensor detects instantaneous flow, and density sensor obtains powder bulk density. The first calculation module calculates the mass flow rate abnormality assessment value through the formula. When the safety threshold is exceeded, the control unit triggers an alarm and shuts down the machine.

[0046] Beneficial effects: Dynamic monitoring and early warning: Real-time monitoring of temperature, flow, and density parameters, early warning of spiral blade wear 15-30 minutes in advance, reducing unplanned downtime; Accurate fault diagnosis: The exponential function introduces a temperature correction term to accurately distinguish between normal thermal expansion and flow rate fluctuations caused by abnormal wear, reducing false alarm rates; Closed-loop control protection: Faulty equipment is automatically isolated, reducing unplanned downtime and improving production line stability and safety.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An ultra-fine powder uniform sand conveying device, characterized in that: include: An installation component (1), a grinding and feeding mechanism (2), a spiral conveying mechanism (3) and a controller (57) are provided. The spiral conveying mechanism (3) is fixedly provided on the top right side of the installation component (1) along the left and right directions. The grinding and feeding mechanism (2) and the input end of the top right side of the spiral conveying mechanism (3) are fixedly provided. The grinding and feeding mechanism (2) and the spiral conveying mechanism (3) are electrically connected to the controller (57) respectively.

2. The ultra-fine powder uniform sand conveying device according to claim 1, characterized in that: The mounting assembly (1) comprises: a base plate (101), a first support frame (102), and a second support frame (103); the first support frame (102) is fixedly mounted on the top right side of the base plate (101); an electrostatic sand planting box (17) is fixedly mounted on the top left side of the base plate (101); and the second support frame (103) is fixedly mounted below the electrostatic sand planting box (17) and the first support frame (102).

3. The ultra-fine powder uniform sand conveying device according to claim 2, characterized in that: The screw conveying mechanism (3) comprises: a conveying pipe (4); a conveying pipe (4) along the left and right directions is fixedly installed on the top of the first support frame (102); the bottom outlet end on the left side of the conveying pipe (4) is fixedly connected to a vertical discharge pipe (5); a feed port (6) is fixedly opened on the top right side of the conveying pipe (4); a rotating shaft (7) along the left and right directions is rotatably connected inside the conveying pipe (4); a plurality of grinding hammer heads (8) are fixedly provided on the middle section of the rotating shaft (7); a plurality of spiral blades (9) are fixedly connected to the left and right sections of the rotating shaft (7); a heat dissipation water tank (10) is fixedly installed on the top of the conveying pipe (4); the right end axis of the rotating shaft (7) is fixedly connected to a double pulley (12); and a driving motor (13) is fixedly installed on the top left side of the conveying pipe (4).

4. The ultra-fine powder uniform sand conveying device according to claim 3, characterized in that: A heat dissipation water tank (10) is fixedly installed on the top of the conveying pipe (4), and a plurality of heat dissipation fins (11) are fixedly installed on the heat dissipation water tank (10). A pulley (14) is fixedly installed on the right end of the driving motor (13), and the pulley (14) is connected to the double pulley (12) through a belt (15). A belt conveyor (16) is fixedly provided on the second support frame (103) along the left and right directions, and the right end of the belt is located below the discharge pipe (5). The left section of the belt conveyor (16) extends into the electrostatic sand planting box (17), and an electrostatic field emission mechanism (56) is provided inside the electrostatic sand planting box (17). A mirror roller (18) is rotatably connected inside the electrostatic sand planting box (17) along the front and rear directions.

5. The ultra-fine powder uniform sand conveying device according to claim 4, characterized in that: The grinding feeding mechanism (2) comprises: a vertical pipe (19), the top of the feed port (6) is fixedly connected to the vertical pipe (19), the inner top of the vertical pipe (19) is rotatably connected to the feeding wheel (20), the right end of the feeding wheel (20) is fixedly connected to the output shaft end of the motor (21), the top of the vertical pipe (19) is fixedly connected to the grinding funnel (22), the top center of the grinding funnel (22) is fixedly installed with a vertical driving motor (23), the top of the grinding funnel (22) is symmetrically fixedly connected to a pair of feeding hoppers (24), the inner wall of the top of the grinding funnel (22) is fixedly connected to a plurality of radial fixed rods (25), the fixed rods (25) are fixedly connected to the grinding cone (26) near the center end of the grinding funnel (22), and the grinding cone (26) is high in the center and low on the outside.

6. The ultra-fine powder uniform sand conveying device according to claim 5, characterized in that: The output shaft at the bottom of the driving motor 2 (23) is fixedly connected to the vertical rotating shaft 1 (27). The rotating shaft 1 (27) rotates from top to bottom and passes through the top wall of the grinding funnel (22) and the grinding cone (26). The bottom of the rotating shaft 1 (27) is fixedly connected to a plurality of stirring rods (28). The top of the rotating shaft 1 (27) is fixedly connected to a limit plate (29). The rotating shaft 1 (27) at the bottom of the limit plate (29) is provided with a compression spring (30). The bottom end of the compression spring (30) is fixedly connected to a sleeve 1 (31). The sleeve 1 (31) is connected to the rotating shaft 1 (27) in an upward and downward sliding manner. The sleeve 1 (31) is symmetrically rotated left and right to connect a pair of grinding rollers (32). The grinding rollers (32) are in rolling connection with the top conical surface of the grinding cone (26).

7. The ultra-fine powder uniform sand conveying device according to claim 3, characterized in that: A sand and gravel screening and subdivision mechanism is also provided below the discharge pipe (5), and the sand and gravel screening and subdivision mechanism comprises: a vertical rod (1), the bottom right end of the conveying pipe (4) is fixedly connected to a bearing bracket (33), the bearing bracket (33) is rotatably connected to a rotating shaft (34) in the left and right directions, the right end of the rotating shaft (34) is fixedly connected to a pulley (35), the double pulley (12) and the pulley (35) are connected via a belt (36), the left end of the rotating shaft (34) is fixedly connected to a fan blade (37), the fan blade (37), an air collecting tube (38) is provided on the outer surface of the fan blade (37), and the air collecting tube (38) is fixedly connected to the bottom of the conveying pipe (4).

8. The ultra-fine powder uniform sand conveying device according to claim 7, characterized in that: The bottom of the left side of the conveying pipe (4) is fixedly connected to a plurality of vertical rods (39), the bottom ends of the vertical rods (39) are fixedly connected to a baffle (40), the vertical rods (39) are slidably connected to a horizontal plate (41) up and down, the outer sleeve of the vertical rods (39) between the horizontal plate (41) and the baffle (40) is provided with a spring (42), the bottom of the horizontal plate (41) is fixedly installed with a screening box (43), the bottom of the conveying pipe (4) is fixedly connected to a bracket (44), the bottom of the bracket (44) is fixedly installed with a vibration motor (45), the front output shaft end of the vibration motor (45) is fixedly connected to a cam (46), the cam (46) presses the horizontal plate (41) downward, and the bottom of the screening box (43) is fixedly provided with a partition (47) and a partition (48) at intervals on the left and right.

9. The ultra-fine powder uniform sand conveying device according to claim 8, characterized in that: An inclined screen mesh 1 (49) with a higher left side and a lower right side is fixedly installed on the top of the left side wall of the screening box (43) and the top of the partition 1 (47). An inclined screen mesh 2 (50) with a higher left side and a lower right side is fixedly installed on the top of the partition 1 (47) and the top of the partition 2 (48). The mesh of the inclined screen mesh 1 (49) is smaller than that of the inclined screen mesh 2 (50). An electric valve 1 (51) and an electric valve 2 (52) are respectively provided on the bottom wall of the screening box (43) below the inclined screen mesh 1 (49) and the inclined screen mesh 2 (50). A discharge valve (53) is fixedly opened on the bottom right side of the screening box (43). An air outlet nozzle (54) is fixedly installed on the top of the right side wall of the screening box (43). The air outlet nozzle (54) is fixedly connected to the air collecting tube (38) through the air supply pipe (55).

10. The ultra-fine powder uniform sand conveying device according to claim 9, characterized in that: There is also a transportation abnormality status assessment and warning module, which includes: A temperature detection unit 1, for detecting the ambient temperature of the screw conveying mechanism (3) in real time; The second temperature detection unit is used to detect the working temperature of the pipe wall of the delivery pipe (4) in real time; A density sensor for detecting the density of fine powder in the conveying pipe (4); A flow sensor is used to detect the sand and gravel flow rate at the outlet of the delivery pipe (4); Alarm, used to give an alarm in case of abnormal situation; The first calculation module is used to calculate the abnormal state evaluation value of the mass flow rate of the screw conveying mechanism (3) at the i-th detection ; A control unit, used to collect and process data from various sensors and detection units, the control unit being electrically connected to the first calculation module, temperature detection unit 1, temperature detection unit 2, density sensor, flow sensor, and alarm; The judgment unit compares, when When the value is greater than the safety threshold, the control unit controls the alarm to sound an alarm and promptly stops the operation of the drive motor 1, notifying the maintenance personnel to repair the spiral conveying mechanism (3) and replace the spiral blade (9). When the value is less than or equal to the safety threshold, the deviation abnormality status assessment value is normal and no alarm is required.

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