An online particle size analyzer

Abstract

This utility model relates to the field of particle size detection technology, specifically to an online particle size analyzer. This online particle size analyzer is used to detect ferromagnetic particles and includes: a detection shell; and a magnetic distribution detection mechanism. The magnetic distribution detection mechanism includes an electromagnetic plate fixedly connected to the inner wall of the detection shell, which attracts ferromagnetic particles. The magnetic distribution detection mechanism detects the magnetic distribution of particles by observing the different attraction forces of the electromagnetic plate on particles of different sizes. It utilizes a recording and dynamic adjustment device, and can also separate particles of different sizes for subsequent particle size detection, providing a precise basis for subsequent particle size analysis. Furthermore, the feeding mechanism allows for slow particle feeding, preventing inaccurate detection due to excessive particle size at once.

Description

Technical Field

[0001] This utility model relates to the field of particle size detection technology, specifically to an online particle size detector. Background Technology

[0002] A particle size analyzer is an instrument used to measure particle size and distribution. It is widely used in the testing of toners, pharmaceuticals, food, cement, minerals, powder coatings, carbon, emulsions, pigments, and metal powders. Its purpose is to ensure product quality, optimize production processes, predict material properties, and comply with regulations. It helps control product consistency, improve production efficiency, meet industry standards, and guide the research and development of new materials and products.

[0003] Existing particle size analyzers use laser scattering, but all materials (including ferromagnetic minerals or metal powders) interfere with light propagation, leading to inaccurate results. When detecting ferromagnetic particles, traditional methods are still the only option. Factors such as large particle size variations, uneven dispersion, optical system limitations, and irregular particle shapes can cause occlusion and overlap during detection, resulting in inaccurate particle size measurements. Therefore, a particle size detection method that utilizes the ferromagnetism of materials cannot overcome the shortcomings of laser scattering. Current technology lacks a particle size detection method that leverages the ferromagnetism of materials. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an online particle size analyzer, which can effectively solve the problem that the existing technology cannot detect ferromagnetic minerals and metal powders based on ferromagnetism.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides an online particle size analyzer for detecting ferromagnetic particles, comprising: Detection shell; A magnetic distribution detection mechanism includes an electromagnetic plate fixedly connected to the inner wall of a detection shell, which is used to attract ferromagnetic particles. A first imaging plate for photographing and recording the distribution of ferromagnetic particles is fixedly connected to the top of the detection shell. The first imaging plate is electrically connected to an image processing system. The magnetic distribution detection mechanism also includes a collection component disposed inside the detection shell.

[0006] Preferably, the collecting component includes multiple baffles fixed in a linear array on the inner wall of the detection shell, and each baffle is fixedly connected to a first triangular material dividing block. The multiple baffles divide the detection shell into multiple converging areas. The inner walls on both sides of the converging areas are symmetrically fixed with material dropping inner arc blocks and form a material outlet. The lower ends of the two material dropping inner arc blocks in each converging area are symmetrically provided with an adjustable distance structure about the material outlet.

[0007] Preferably, the adjustable structure includes a support plate and an adjusting plate, with the adjusting plate positioned close to the discharge port. An electromagnetic block and a permanent magnet block with magnetic repulsion are fixed to opposite sides of the support plate and the adjusting plate, respectively. A spring made of non-ferromagnetic material is fixed to opposite sides of the electromagnetic block and the permanent magnet block. A magnetic shielding layer is arranged around the electromagnetic block and the permanent magnet block.

[0008] Preferably, a first threaded rod is rotatably connected to the inner wall of the detection shell, a first limiting rod is fixedly connected to the inner wall of the detection shell, and the first threaded rod and the first limiting rod are arranged parallel to each other. A first motor that drives the first threaded rod is fixedly connected to the outer wall of the detection shell. A connecting plate is threadedly connected to the outer wall of the first threaded rod. The other end of the connecting plate is slidably connected to the first limiting rod. Multiple cleaning plates are fixedly connected to the top of the connecting plate at the corresponding position of the discharge port.

[0009] Preferably, it also includes a particle size detection mechanism, which includes a barrier plate fixed to the bottom wall of the detection shell and corresponding to the position of each baffle plate. The multiple barrier plates divide the detection shell into multiple detection spaces. A second imaging plate and a direct light plate are fixed to the inner walls on both sides of the detection space, and the second imaging plate, the direct light plate and the barrier plate are parallel. The second imaging plate is electrically connected to the image processing system.

[0010] Preferably, the inner wall of the detection shell has two symmetrical sliding grooves. The inner wall of one of the sliding grooves is rotatably connected to a second threaded rod, and the outer wall of the detection shell is fixedly connected to a second motor for driving the second threaded rod. The inner wall of the other sliding groove is fixedly connected to a second limiting rod. The outer wall of the second threaded rod is threadedly connected to a horizontal plate. The other end of the horizontal plate is slidably connected to the second limiting rod. The outer walls on both sides of the horizontal plate are respectively fixedly connected to pusher plates that are fixedly slidably in contact with the bottom of the detection shell. The top of the horizontal plate and the top of the two pusher plates are fixedly connected to a second triangular material dividing block.

[0011] Preferably, it also includes a feeding mechanism, which includes a material discharge port opened at the top of the detection shell, a feeding frame fixedly connected to the top of the detection shell, an irregularly shaped material discharge plate fixedly connected to the inner wall of the feeding frame above the material discharge port, two symmetrical electric telescopic rods fixedly connected to the inner wall of the feeding frame, a feeding plate fixedly connected to the telescopic end of the electric telescopic rod, a telescopic plate fixedly connected to the top of the feeding plate, and a baffle plate elastically hinged to the bottom end of the irregularly shaped material discharge plate.

[0012] Preferably, the outer walls on both sides of the detection shell are provided with discharge grooves parallel to the pusher plate, and the discharge grooves are elastically hinged with barrier doors. The electromagnetic block image processing system is electrically connected to a PLC controller.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art: The magnetic distribution of particles is detected by the electromagnetic plate in the magnetic distribution detection mechanism, which attracts particles of different sizes differently. The magnetic distribution is recorded by photography and dynamically adjusted. Furthermore, particles of different sizes can be detected separately in subsequent particle size detection, providing a reliable data basis for subsequent particle size detection. The feeding mechanism allows the particles to be fed slowly, preventing inaccurate detection caused by feeding too many particles at once. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the present invention. Figure 1 ; Figure 3 This is a three-dimensional cross-sectional structural diagram of the feeding mechanism of this utility model; Figure 4 This is a schematic diagram of part of the internal structure of this utility model; Figure 5 This is an exploded view of the collection component of this utility model; Figure 6 This is a cross-sectional three-dimensional structural diagram of the present invention; Figure 7 This is a schematic diagram of the three-dimensional cross-section of part of the present invention. Figure 2 ; Figure 8 This is a partial three-dimensional structural diagram of the particle size detection mechanism of this utility model.

[0016] Reference numerals: 1. Detection shell; 2. Magnetic distribution detection mechanism; 21. Electromagnetic plate; 22. First shooting plate; 23. Collection assembly; 231. Permanent magnet block; 232. Dividing plate; 233. First triangular material dividing block; 234. Material dropping inner arc block; 235. Material outlet; 236. Support plate; 237. Electromagnetic block; 238. Spring; 239. Adjusting plate; 24. First threaded rod; 25. First limiting rod; 26. First motor; 27. Connecting plate; 28. Cleaning plate; 3. Particle size detection mechanism; 31. Barrier plate; 32. Second shooting plate; 33. Direct light plate; 34. Slide groove; 35. Second threaded rod; 36. Second motor; 37. Second limit rod; 38. Horizontal plate; 39. Pushing plate; 310. Second triangular material dividing block; 4. Feeding mechanism; 41. Drop port; 42. Feeding frame; 43. Irregularly shaped drop plate; 44. Electric telescopic rod; 45. Feeding plate; 46. Telescopic plate; 47. Baffle plate; 5. Discharge chute; 6. Barrier gate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example: Refer to Figures 1 to 8 An online particle size analyzer for detecting ferromagnetic particles, comprising a detection shell 1; To detect the distribution of magnetically-detected particles, the following specific structure is used, refer to... Figure 2 The magnetic distribution detection mechanism 2 includes an electromagnetic plate 21 fixedly connected to the inner wall of the detection shell 1. The electromagnetic plate 21 is used to attract ferromagnetic particles. A first imaging plate 22 is fixedly connected to the top of the detection shell 1 for recording the distribution of ferromagnetic particles. The first imaging plate 22 is electrically connected to an image processing system. The magnetic distribution detection mechanism 2 also includes a collection component 23 disposed inside the detection shell 1.

[0020] To separately collect ferromagnetic particles, the following specific structure is used, see reference. Figure 2 , Figure 4 , Figure 5 The collecting component 23 includes multiple baffles 232 linearly arrayed and fixed to the inner wall of the detection shell 1. Each baffle 232 has a first triangular material distribution block 233 fixedly connected to its upper end. The multiple baffles 232 divide the detection shell 1 into multiple converging areas. The inner walls on both sides of the converging areas are symmetrically fixed with material dropping inner arc blocks 234 and form a discharge port 235. The lower ends of the two material dropping inner arc blocks 234 in each converging area are symmetrically provided with an adjustment structure about the discharge port 235. The first triangular material distribution block 233 can prevent particles from falling onto the material dropping inner arc block 234.

[0021] The adjustable gap structure includes a support plate 236 and an adjusting plate 239, with the adjusting plate 239 positioned near the discharge port 235. On opposite sides of the support plate 236 and the adjusting plate 239, an electromagnetic block 237 and a permanent magnet block 231 with magnetic repulsion are respectively fixed. On opposite sides of the electromagnetic block 237 and the permanent magnet block 231, a spring 238 made of non-ferromagnetic material is fixed. Magnetic shielding layers are arranged around the electromagnetic block 237 and the permanent magnet block 231, and the electromagnetic block 237 and the permanent magnet block 231 have weak magnetism and will not affect the particles.

[0022] To prevent particles from clogging the discharge port 41, the following structure is used, see reference. Figure 4 , Figure 5 The inner wall of the detection shell 1 is rotatably connected to a first threaded rod 24, and the inner wall of the detection shell 1 is fixedly connected to a first limiting rod 25. The first threaded rod 24 and the first limiting rod 25 are arranged parallel to each other. The outer wall of the detection shell 1 is fixedly connected to a first motor 26 that drives the first threaded rod 24. The outer wall of the first threaded rod 24 is threadedly connected to a connecting plate 27. The other end of the connecting plate 27 is slidably connected to the first limiting rod 25. Multiple cleaning plates 28 are fixedly connected to the top of the connecting plate 27 and at the corresponding position of the discharge port 235. The first motor 26 drives the first threaded rod 24 to rotate, and the first limiting rod 25 limits the movement of the connecting plate 27 on the first threaded rod 24. The first motor 26 will automatically reverse the drive at regular intervals (the time is the time it takes for the first threaded rod 24 to move the connecting plate 27 from one end of the first threaded rod 24 to the other end). The movement of the connecting plate 27 can drive the cleaning plate 28 to move back and forth in the discharge port 41 to prevent particles from clogging.

[0023] To detect particle size, the following structure is used, refer to... Figure 6It also includes a particle size detection mechanism 3, which includes a barrier plate 31 fixed to the bottom wall of the detection shell 1 and corresponding to the positions of each baffle 232. Multiple barrier plates 31 divide the detection shell 1 into multiple detection spaces. The inner walls on both sides of the detection space are respectively fixed with a second imaging plate 32 and a direct light plate 33, and the second imaging plate 32, the direct light plate 33 and the barrier plate 31 are parallel. The second imaging plate 32 is electrically connected to the image processing system.

[0024] To remove the detected particles, the following structure is used, refer to... Figure 7 , Figure 8 The inner wall of the detection shell 1 has two symmetrical sliding grooves 34. The inner wall of one of the sliding grooves 34 is rotatably connected to a second threaded rod 35. The outer wall of the detection shell 1 is fixedly connected to a second motor 36 for driving the second threaded rod 35. The inner wall of the other sliding groove 34 is fixedly connected to a second limiting rod 37. The outer wall of the second threaded rod 35 is threadedly connected to a horizontal plate 38. The other end of the horizontal plate 38 is slidably connected to the second limiting rod 37. The outer walls of both sides of the horizontal plate 38 are respectively fixedly connected to push plates 39 that are fixedly slidably in contact with the bottom of the detection shell 1. The top of the horizontal plate 38 and the top of the two push plates 39 are fixedly connected to a second triangular dividing block 310. The second motor 36 drives the second threaded rod 35 to rotate, and then the second limiting rod 37 limits the horizontal plate 38, so that the horizontal plate 38 can move on the surface of the second threaded rod 35. The second motor 36 will also automatically reverse the drive at regular intervals (the time is the time when the second threaded rod 35 drives the horizontal plate 38 from one end of the second threaded rod 35 to the other end). The movement of the horizontal plate 38 can drive the pusher plate 39 to move synchronously, and the pusher plate 39 pushes the particles that fall at the bottom of the detection shell 1 out through the discharge chute.

[0025] To prevent excessive material feeding at once, slow, batch feeding is implemented using the following settings. The specific structure is as follows (see reference). Figure 3 It also includes a feeding mechanism 4, which includes a discharge port 41 at the top of the detection shell 1. A feeding frame 42 is fixedly connected to the top of the detection shell 1. A shaped discharge plate 43 above the discharge port 41 is fixedly connected to the inner wall of the feeding frame 42. Two symmetrical electric telescopic rods 44 are fixedly connected to the inner wall of the feeding frame 42. A feeding plate 45 is fixedly connected to the telescopic end of the electric telescopic rod 44. A telescopic plate 46 is fixedly connected to the top of the feeding plate 45. A baffle plate 47 is elastically hinged to the bottom end of the shaped discharge plate 43. The electric telescopic rod 44 is activated and then reset at a predetermined interval. This interval is preset according to the detection time of different ferromagnetic materials. The telescopic plate 46 prevents particles from falling on the electric telescopic rod when the feeding plate 45 moves forward, thus affecting the contraction of the electric telescopic rod.

[0026] The outer walls on both sides of the detection shell 1 are provided with discharge grooves 5 parallel to the pusher plate 39. A barrier door 6 is elastically hinged inside the discharge groove 5. The electromagnetic block 237 image processing system is electrically connected to a PLC controller.

[0027] The working principle of this utility model is as follows: First, the ferromagnetic particles to be tested are placed into the feeding frame 42. Then, the electric telescopic rod 44 is activated, which drives the feeding plate 45 to move forward. The ferromagnetic particles (hereinafter referred to as particles) are pushed through the baffle plate 47 and then pushed into the detection shell 1 through the discharge port 41. Simultaneously with the feeding of particles, the electromagnetic plate 21 is activated. The pre-controlled magnetic force of the electromagnetic plate (obtained through pre-testing of the electromagnetic plate 21's attraction to particles, requiring it to attract particles but not adsorb them onto its surface) attracts the particles as they fall from the discharge port 41. Particle size affects the size of the magnetic domains and the thickness of the domain walls. Larger particles, due to their larger volume, have a greater total magnetic moment, resulting in a stronger magnetic response in the magnetic field. Larger particles typically form a clear magnetic alignment, exhibiting a strong attraction. Therefore, larger particles are attracted closer to the electromagnetic plate 21 by its magnetic attraction, while smaller particles, with weaker magnetization, are farther away. This allows for simple differentiation and distribution of particle sizes. The magnetization intensity is proportional to the distance generated by magnetic attraction, greatly reducing errors. During particle distribution, the first imaging plate 22 above records the particle distribution, and the image processing system analyzes and detects the captured images. Particles within a certain particle size range will enter the same area, and then slide down to the discharge port 235 through the inner arc block 234. After falling through the discharge port 235, they fall directly through the two adjusting plates 239. The distance between the adjusting plates 239 can be adjusted according to the real-time detected particle size. The specific adjustment method is as follows: the approximate particle size detected by the image processing system is transmitted to the PLC controller. Then, the PLC controller controls the current supplied to the electromagnetic block 237 to control the distance between the two adjusting plates 239. The distance is larger than the largest particle size to allow the largest particle size to pass through, preventing overlap due to a large distance, which may cause detection errors, and jamming due to a small distance. As the particles fall to the bottom of the detection shell 1, they are illuminated by a direct light plate 33 onto the surface of the particles, creating a shadow on the other side. The shadow is then captured by a second imaging plate 32 and transmitted to an image processing system for processing and analysis of the particle size.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An online particle size analyzer, used for detecting ferromagnetic particles, characterized in that, include: Detection shell (1); The magnetic distribution detection mechanism (2) includes an electromagnetic plate (21) fixedly connected to the inner wall of the detection shell (1). The electromagnetic plate (21) is used to attract ferromagnetic particles. A first imaging plate (22) for photographing and recording the distribution of ferromagnetic particles is fixedly connected to the top of the detection shell (1). The first imaging plate (22) is electrically connected to an image processing system. The magnetic distribution detection mechanism (2) also includes a collection component (23) disposed inside the detection shell (1).

2. The on-line particle size detector according to claim 1, wherein The collecting component (23) includes multiple baffles (232) linearly arrayed and fixed to the inner wall of the detection shell (1), and each baffle (232) is fixedly connected to a first triangular material dividing block (233). The multiple baffles (232) divide the detection shell (1) into multiple converging areas. The inner walls on both sides of the converging area are symmetrically fixed with material dropping inner arc blocks (234) and form a material outlet (235). The lower ends of the two material dropping inner arc blocks (234) in each converging area are symmetrically provided with an adjustment structure about the material outlet (235).

3. The on-line particle size detector according to claim 2, wherein The adjustable structure includes a support plate (236) and an adjusting plate (239), with the adjusting plate (239) positioned near the discharge port (235). On opposite sides of the support plate (236) and the adjusting plate (239), an electromagnetic block (237) and a permanent magnet block (231) with magnetic repulsion are fixed respectively. On opposite sides of the electromagnetic block (237) and the permanent magnet block (231), a spring (238) made of non-ferromagnetic material is fixed. Magnetic shielding layers are arranged around the electromagnetic block (237) and the permanent magnet block (231).

4. The on-line particle size detector according to claim 3, wherein The inner wall of the detection shell (1) is rotatably connected to a first threaded rod (24), and the inner wall of the detection shell (1) is fixedly connected to a first limiting rod (25). The first threaded rod (24) and the first limiting rod (25) are arranged parallel to each other. The outer wall of the detection shell (1) is fixedly connected to a first motor (26) that drives the first threaded rod (24). The outer wall of the first threaded rod (24) is threadedly connected to a connecting plate (27). The other end of the connecting plate (27) is slidably connected to the first limiting rod (25). The top of the connecting plate (27) and the corresponding position at the discharge port (235) are fixedly connected to multiple cleaning plates (28).

5. The on-line particle size detector of claim 4, wherein It also includes a particle size detection mechanism (3), which includes a barrier plate (31) fixed to the bottom wall of the detection shell (1) and corresponding to the position of each baffle (232). The multiple barrier plates (31) divide the detection shell (1) into multiple detection spaces. The inner walls on both sides of the detection space are respectively fixed with a second imaging plate (32) and a direct light plate (33), and the second imaging plate (32), the direct light plate (33) and the barrier plate (31) are parallel. The second imaging plate (32) is electrically connected to the image processing system.

6. The on-line particle size detector of claim 5, wherein The inner wall of the detection shell (1) has two symmetrical sliding grooves (34). The inner wall of one of the sliding grooves (34) is rotatably connected to a second threaded rod (35). The outer wall of the detection shell (1) is fixedly connected to a second motor (36) for driving the second threaded rod (35). The inner wall of the other sliding groove (34) is fixedly connected to a second limiting rod (37). The outer wall of the second threaded rod (35) is threadedly connected to a horizontal plate (38). The other end of the horizontal plate (38) is slidably connected to the second limiting rod (37). The outer walls of the two sides of the horizontal plate (38) are respectively fixedly connected to pusher plates (39) that are fixedly slidably in contact with the bottom of the detection shell (1). The top of the horizontal plate (38) and the top of the two pusher plates (39) are fixedly connected to a second triangular dividing block (310).

7. The on-line particle size detector of claim 6, wherein It also includes a feeding mechanism (4), which includes a discharge port (41) opened at the top of the detection shell (1). A feeding frame (42) is fixedly connected to the top of the detection shell (1). A shaped discharge plate (43) above the discharge port (41) is fixedly connected to the inner wall of the feeding frame (42). Two symmetrical electric telescopic rods (44) are fixedly connected to the inner wall of the feeding frame (42). A feeding plate (45) is fixedly connected to the telescopic end of the electric telescopic rod (44). A telescopic plate (46) is fixedly connected to the top of the feeding plate (45). A baffle plate (47) is elastically hinged to the bottom end of the shaped discharge plate (43).

8. The on-line particle size detector of claim 7, wherein, The outer walls on both sides of the detection shell (1) are provided with discharge grooves (5) parallel to the pusher plate (39). A barrier door (6) is elastically hinged inside the discharge groove (5). The electromagnetic block (237) and the image processing system are electrically connected to a PLC controller.

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