Aluminum powder particle size detection mechanism

Abstract

The utility model provides a kind of aluminium powder particle size detection mechanism, it is characterized in that, for being connected with aluminium powder ball mill, aluminium powder particle size detection mechanism includes: sampling part, including being opened in the first sampling pipeline of discharge cover, first sampling pipeline is inclined towards the center of discharge cover, one end of first sampling pipeline is opened in first side, other end is opened in second side, and it is located in the center of discharge cover.Sampling part further includes being opened in the second sampling pipeline of shell, first sampling pipeline is communicated with second sampling pipeline simultaneously in the center of discharge cover, dynamic sealing device is arranged between discharge cover and shell, first sampling pipeline and second sampling pipeline are communicated by dynamic sealing device.Particle size detection part, including negative pressure sampling component, with second sampling tube communication, for extracting aluminium powder in aluminium powder ball mill.The aluminium powder particle size detection mechanism provided in the present application can realize continuous sampling and particle size detection without stopping.

Description

Technical Field

[0001] This application relates to the industrial production of aluminum powder, and more specifically, to an aluminum powder particle size detection mechanism. Background Technology

[0002] In the ball milling process of aluminum powder production, the fineness of aluminum powder particles can only be indirectly inferred from empirical parameters (such as ball milling time, rotation speed, and ball-to-powder ratio), making it impossible to grasp the actual particle size distribution of aluminum powder inside the mill in real time. The traditional approach is to first open the discharge cover of the ball mill after ball milling to release all the aluminum powder, then manually sample and package it, and send it to a laboratory for offline testing using a laser particle size analyzer or sieve analyzer. This process is not only time-consuming and labor-intensive, but the ball mill must also be stopped during sampling, transportation, and waiting for test results, leading to a significant decrease in production efficiency. If the test results show that the particle size still does not meet the requirements, the material must be refilled and ball milling continued, resulting in a waste of energy and materials. Furthermore, the process of opening the cover for sampling easily introduces moisture and impurities, along with aluminum powder dust, increasing safety risks and affecting product quality. Utility Model Content

[0003] This application provides an aluminum powder particle size detection mechanism that enables continuous sampling and particle size detection without stopping the machine.

[0004] Specifically, this application is implemented through the following technical solution:

[0005] One aspect of this application provides an aluminum powder particle size detection mechanism for connection to an aluminum powder ball mill. The aluminum powder ball mill includes a detachable discharge cover and a housing. The discharge cover is rotatable at high speed relative to the housing. The side of the discharge cover facing the interior of the aluminum powder ball mill is a first side, and the side facing away from the aluminum powder ball mill is a second side. The aluminum powder particle size detection mechanism includes:

[0006] The sampling section includes a first sampling pipe opened on the discharge cover. The first sampling pipe is inclined toward the center of the discharge cover. One end of the first sampling pipe is opened on the first side, and the other end is opened on the second side and located at the center of the discharge cover.

[0007] The sampling section further includes a second sampling pipeline opened in the housing. The first sampling pipeline is simultaneously connected to the second sampling pipeline at the center of the unloading cover. A dynamic sealing device is provided between the unloading cover and the housing. The first sampling pipeline and the second sampling pipeline are connected through the dynamic sealing device.

[0008] The particle size detection unit includes a negative pressure sampling component, which is connected to the second sampling pipeline and is used to extract aluminum powder from the aluminum powder ball mill.

[0009] Optionally, the sampling section includes at least three first sampling lines, one end of each of the three first sampling lines is opened on the first side, the other end of each of the three first sampling lines is opened on the second side, and they are located at the center of the unloading cover. The three first sampling lines are centrally symmetrically distributed on the unloading cover.

[0010] Optionally, the dynamic sealing device includes a rotor end and a stator end, wherein the rotor end is fixedly connected to the discharge cover and can rotate relative to the stator end together with the discharge cover;

[0011] The rotor end has an internal channel that communicates with the first sampling pipeline;

[0012] The stator end is fixedly connected to the housing and has an internal channel communicating with the second sampling pipeline. A sealing pair is provided between the stator end and the rotor end. The sealing pair is configured to remain airtight when the rotor end rotates, so that the first sampling pipeline and the second sampling pipeline are sealed and connected.

[0013] Optionally, the particle size detection unit is disposed on the side of the housing facing away from the discharge cover, the negative pressure sampling assembly includes a first negative pressure pump and a second negative pressure pump, and the particle size detection unit includes:

[0014] The sampling chamber is connected to the first negative pressure pump and the sampling chamber is connected to the second sampling pipeline. The first negative pressure pump is used to draw aluminum powder from the aluminum powder ball mill into the sampling chamber through the second sampling pipeline and the first sampling pipeline.

[0015] The sample cell is enclosed by a transparent partition. The sample cell is connected to the sampling chamber through an air extraction pipe. The side of the sample cell away from the air extraction pipe is connected to the second negative pressure pump. The second negative pressure pump is used to extract aluminum powder from the sampling chamber into the sample cell for particle size detection.

[0016] A laser emitter is positioned directly opposite the sample cell and is used to emit parallel light rays toward the sample cell;

[0017] A photodetector is disposed on the side of the sample cell opposite to the laser emitter, for receiving light passing through aluminum powder particles and emitting electrical signals.

[0018] Optionally, the sample cell includes a first dispersion partition and a second dispersion partition. The first dispersion partition and the side wall of the sample cell near the suction pipe form a first dispersion area, which is connected to the suction pipe. The second dispersion partition and the side wall of the sample cell near the second negative pressure pump form a second dispersion area, which is connected to the second negative pressure pump.

[0019] Both the first and second dispersion partitions have air holes arranged in an array.

[0020] Optionally, the laser emitter includes a plurality of optical components arranged in a straight line, the optical components including a laser and a collimating lens, for forming parallel light from the beam of laser emitted by the laser through the collimating lens.

[0021] Optionally, the photodetector includes multiple photosensitive units, which are arranged in an array on the side of the sample cell facing away from the laser emitter.

[0022] This application provides an aluminum powder particle size detection mechanism. It establishes a continuous negative pressure sampling path under the continuous high-speed rotation of a ball mill. The first sampling pipeline is inclined centripetally towards the center of the discharge cover. When the negative pressure sampling component is not in operation, the aluminum powder adheres to the outer periphery of the tank under centrifugal force and gravity. The powder in the narrow-diameter, inclined first sampling pipeline remains stationary, with virtually no leakage. When the negative pressure sampling component is triggered, the instantaneous negative pressure overcomes the centrifugal force, sequentially introducing the aluminum powder from the tank through the first sampling pipeline, the dynamic sealing device, and the second sampling pipeline into the particle size detection unit, achieving continuous sampling without stopping the mill. The sampling volume and frequency can be precisely controlled by adjusting the start / stop duration and power of the negative pressure sampling component. This eliminates the need to open the cover, interrupt the ball milling process, or require manual intervention, thus achieving real-time particle size monitoring while ensuring system sealing. Particle size data is fed back to the operator in real time, allowing them to adjust the ball milling time, speed, or feeding strategy based on preset particle size thresholds, significantly reducing the probability of over-milling or under-milling and improving aluminum powder quality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an aluminum powder detection mechanism shown in an exemplary embodiment of this application;

[0024] Figure 2 This is a front view of the unloading cover shown in an exemplary embodiment of this application;

[0025] Figure 3 This is a partial schematic diagram of the sampling section shown in an exemplary embodiment of this application;

[0026] Figure 4 This is a schematic diagram of a particle size detection unit shown in an exemplary embodiment of this application;

[0027] Figure 5 This is a partial schematic diagram of a particle size detection unit shown in an exemplary embodiment of this application;

[0028] Figure 6 This is a front view of the dispersion partition shown in an exemplary embodiment of this application;

[0029] Figure 7This is a schematic diagram of a laser emitter shown in an exemplary embodiment of this application.

[0030] Wherein: A, unloading cover; A1, first side; A2, second side; B, shell; 100, sampling section; 110, first sampling pipeline; 120, second sampling pipeline; 130, dynamic sealing device; 131, rotor end; 132, stator end; 133, sealing pair; 200, particle size detection section; 210, negative pressure sampling assembly; 211, first negative pressure pump; 212, second negative pressure pump; 220, sampling chamber; 230, sample cell; 231, first dispersion partition; 232, second dispersion partition; 230a, first dispersion zone; 230b, second dispersion zone; 240, laser emitter; 241, laser; 242, collimating lens; 250, photodetector; 260, exhaust pipe. Detailed Implementation

[0031] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3This application provides an aluminum powder particle size detection mechanism for connection to an aluminum powder ball mill. The aluminum powder ball mill includes a detachable discharge cover A and a housing B. The discharge cover A can rotate at high speed relative to the housing B. Here, the discharge cover A serves as the cover of the grinding jar of the aluminum powder ball mill. As the grinding jar rotates at high speed, the cover also rotates synchronously at high speed relative to the housing B. The side of the discharge cover A facing the interior of the aluminum powder ball mill is designated as the first side A1, and the side facing away from the aluminum powder ball mill is designated as the second side A2. The aluminum powder particle size detection mechanism includes a sampling section 100 and a particle size detection section 200. The sampling section 100 includes a first sampling pipe 110 opened in the discharge cover A. The first sampling pipe 110 is inclined towards the center of the discharge cover A. One end of the first sampling pipe 110 is opened in the first side A1, and the other end is opened in the second side A2, located at the center of the discharge cover A. The sampling unit 100 also includes a second sampling pipe 120 opened in the housing B. The first sampling pipe 110 is connected to the second sampling pipe 120 at the center of the discharge cover A. A dynamic sealing device 130 is provided between the discharge cover A and the housing B. The first sampling pipe 110 and the second sampling pipe 120 are connected through the dynamic sealing device 130. The particle size detection unit 200 includes a negative pressure sampling component 210, which is connected to the second sampling pipe and is used to extract aluminum powder from the aluminum powder ball mill.

[0034] This application utilizes the aforementioned structure to create a continuous negative pressure sampling path under conditions of continuous high-speed rotation of the ball mill. The first sampling pipe 110 is inclined centripetally towards the center of the discharge cover A. When the negative pressure sampling component 210 is not in operation, the aluminum powder adheres to the outer periphery of the tank under the action of centrifugal force and gravity. The powder inside the narrow-diameter and inclined first sampling pipe 110 remains stationary, with virtually no leakage. When the negative pressure sampling component 210 is triggered, the instantaneous negative pressure overcomes the centrifugal force, sequentially introducing the aluminum powder from the tank through the first sampling pipe 110, the dynamic sealing device 130, and the second sampling pipe 120 into the particle size detection unit 200, achieving continuous sampling without stopping the machine. The sampling volume and sampling frequency can be precisely controlled by adjusting the start-stop duration and power of the negative pressure sampling component 210, without opening the cover, interrupting the ball milling process, or requiring manual intervention, thereby achieving real-time particle size monitoring while ensuring system sealing. Particle size data is fed back to staff in real time, allowing them to adjust ball milling time, speed, or feeding strategy based on preset particle size thresholds, significantly reducing the probability of over-milling or under-milling and improving aluminum powder quality.

[0035] Combination Figure 2In one embodiment, the sampling unit 100 includes at least three first sampling pipelines 110. One end of each of the three first sampling pipelines 110 is located on a first side A1, meaning that the inlet ends of each pipeline are distributed at different radial positions within the ball mill chamber. The other end of each pipeline is located on a second side A2 and coincides at the center of the discharge cover A, meaning that the outlet ends converge at the center of the discharge cover A and connect with the dynamic sealing device 130. The three first sampling pipelines 110 are centrally symmetrically distributed on the discharge cover A. During negative pressure extraction, aluminum powder from multiple radial positions can be collected simultaneously, significantly reducing sampling deviations caused by local concentration gradients and centrifugal force separation. After the multi-point samples converge, a more representative average particle size signal is formed, reducing the repeatability error of particle size detection results and improving accuracy.

[0036] Combination Figure 3 In one embodiment, the dynamic sealing device 130 includes a rotor end 131 and a stator end 132. The rotor end 131 is fixedly connected to the discharge cover A and can rotate relative to the stator end 132 along with the discharge cover A. The rotor end 131 has an internal channel communicating with the first sampling pipeline 110. The stator end 132 is fixedly connected to the housing B and has an internal channel communicating with the second sampling pipeline 120. A sealing pair 133 is provided between the stator end 132 and the rotor end 131. The sealing pair 133 is configured to remain airtight when the rotor end 131 rotates, so that the first sampling pipeline 110 and the second sampling pipeline 120 are sealed and connected. That is, the rotor end 131 rotates at high speed with the discharge cover A, and the stator end 132 is fixed on the housing B. The two are surrounded by the mechanical sealing pair 133 and can also be supported by a bearing to achieve continuous airtight communication between the first and second sampling pipelines 120 during rotation.

[0037] Combination Figure 4 In one embodiment, the particle size detection unit 200 is disposed on the side of the housing B facing away from the unloading cover A. The negative pressure sampling assembly 210 includes a first negative pressure pump 211 and a second negative pressure pump 212. The particle size detection unit 200 includes a sampling chamber, a sample cell 230, a laser emitter 240, and a photodetector 250.

[0038] The first negative pressure pump 211 is connected to the sampling chamber 220, which is connected to the second sampling pipeline 120. The first negative pressure pump 211 is used to draw a quantitative amount of aluminum powder from the aluminum powder ball mill into the sampling chamber through the second sampling pipeline and the first sampling pipeline. The sample cell 230, enclosed by a transparent partition, is connected to the sampling chamber 220 via an extraction pipe. The side of the sample cell 230 away from the extraction pipe is connected to the second negative pressure pump 212, which is used to extract the aluminum powder from the sampling chamber 220 into the sample cell 230 for particle size detection. The aluminum powder is dispersed in the sample cell 230 under secondary negative pressure. The laser emitter 240 is positioned facing the sample cell 230 and is used to emit collimated parallel light towards the sample cell 230. The photodetector 250 is positioned on the side of the sample cell 230 away from the laser emitter 240 and is used to receive the light passing through the aluminum powder particles and emit an electrical signal. The parallel laser emitted by laser emitter 240 passes through the transparent partition of sample cell 230 and illuminates the surface of aluminum powder particles dispersed in sample cell 230. The aluminum powder particles diffract and scatter the incident parallel light at multiple angles. The angular distribution of the diffracted and scattered light is determined by the size, shape, and refractive index of the aluminum powder particles. The light after diffraction and scattering by the aluminum powder particles is then received by photodetector 250. Here, the light received by photodetector 250 can be scattered light focused by a Fourier lens, forming a light intensity distribution in photodetector 250; then, it is transmitted to external equipment via an electrical signal, which can be analyzed to detect the particle size of the aluminum powder.

[0039] Combination Figure 5 and Figure 6 In one embodiment, the sample cell 230 includes a first dispersion partition 231 and a second dispersion partition. The first dispersion partition 231 and the side wall of the sample cell 230 near the suction pipe 260 form a first dispersion region 230a, which is connected to the suction pipe 260. The second dispersion partition and the side wall of the sample cell 230 near the second negative pressure pump 212 form a second dispersion region 230b, which is connected to the second negative pressure pump 212. Both the first dispersion partition 231 and the second dispersion partition have arrayed air holes. Inside the sample cell 230, the second negative pressure pump 212 first forms a uniform negative pressure field in the second dispersion region 230b. The negative pressure is divided by the array of air holes in the second dispersion partition, and the suction force changes from concentrated to multi-point dispersion. Subsequently, aluminum powder enters the first dispersion region 230a with the airflow and is sheared and homogenized by the array of air holes in the first dispersion partition 231. The dual dispersion effect keeps the aluminum powder in relatively uniform suspension inside the sample cell 230, avoiding agglomeration or concentration gradients, thus ensuring stable laser scattering signal and more accurate particle size measurement results.

[0040] refer to Figure 7In one embodiment, the laser emitter 240 includes multiple optical components arranged in a straight line. Each optical component includes a laser 241 and a collimating lens 242, used to collimate the beam of laser light emitted by the laser 241 into parallel light through the collimating lens 242. By arranging several lasers 241 and corresponding collimating lenses 242 in a straight-line array, the parallel beams output by each component are spatially spliced ​​together to form a linear parallel light source with scalable length and uniform energy distribution, thereby covering the entire effective cross-section of the sample cell 230 in one operation.

[0041] In one embodiment, the photodetector 250 includes multiple photosensitive units (not shown in the figure), which are arranged in an array on the side of the sample cell 230 facing away from the laser emitter 240. This array can be a concentric ring array. The photodetector 250 uses a concentric ring photosensitive unit array, with each ring independently receiving light intensities at different angles after being scattered by the aluminum powder. The electrical signal output by the array is converted from analog to digital and then sent to the control center in real time for analysis to obtain the particle size distribution results.

[0042] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An aluminum powder particle size detection mechanism, characterized in that, For connection with an aluminum powder ball mill, the aluminum powder ball mill includes a detachable discharge cover (A) and a housing (B). The discharge cover (A) can rotate at high speed relative to the housing (B). The side of the discharge cover (A) facing the interior of the aluminum powder ball mill is designated as a first side (A1), and the side facing away from the aluminum powder ball mill is designated as a second side (A2). The aluminum powder particle size detection mechanism includes: The sampling unit (100) includes a first sampling pipe (110) opened on the discharge cover (A), the first sampling pipe (110) is inclined toward the center of the discharge cover (A), one end of the first sampling pipe (110) is opened on the first side (A1), the other end is opened on the second side (A2), and it is located at the center of the discharge cover (A); The sampling unit (100) further includes a second sampling pipeline (120) opened in the housing (B). The first sampling pipeline (110) is connected to the second sampling pipeline (120) at the center of the discharge cover (A). A dynamic sealing device (130) is provided between the discharge cover (A) and the housing (B). The first sampling pipeline (110) and the second sampling pipeline (120) are connected through the dynamic sealing device (130). The particle size detection unit (200) includes a negative pressure sampling component (210) connected to the second sampling pipeline (120) for extracting aluminum powder from the aluminum powder ball mill.

2. The aluminum powder particle size detection mechanism according to claim 1, wherein The sampling section (100) includes at least three first sampling pipelines (110), one end of each of the three first sampling pipelines (110) is opened on the first side (A1), the other end of each of the three first sampling pipelines (110) is opened on the second side (A2), and they are located at the center of the unloading cover (A). The three first sampling pipelines (110) are centrally symmetrically distributed on the unloading cover (A).

3. The aluminum powder particle size detection mechanism according to claim 1, wherein The dynamic sealing device (130) includes a rotor end (131) and a stator end (132). The rotor end (131) is fixedly connected to the discharge cover (A) and can rotate relative to the stator end (132) together with the discharge cover (A). The rotor end (131) is provided with a channel that communicates with the first sampling pipeline (110); The stator end (132) is fixedly connected to the housing (B) and has an internal channel communicating with the second sampling pipeline (120). A sealing pair (133) is provided between the stator end (132) and the rotor end (131). The sealing pair (133) is configured to remain airtight when the rotor end (131) rotates, so that the first sampling pipeline (110) and the second sampling pipeline (120) are sealed and connected.

4. The aluminum powder particle size detection mechanism according to any one of claims 1 to 3, characterized by, The particle size detection unit (200) is disposed on the side of the housing (B) facing away from the discharge cover (A). The negative pressure sampling assembly (210) includes a first negative pressure pump (211) and a second negative pressure pump (212). The particle size detection unit (200) includes: The sampling chamber (220) is connected to the first negative pressure pump (211), and the sampling chamber (220) is connected to the second sampling pipeline (120). The first negative pressure pump (211) is used to draw aluminum powder from the aluminum powder ball mill into the sampling chamber through the second sampling pipeline (120) and the first sampling pipeline (110). The sample cell (230) is surrounded by a transparent partition. The sample cell (230) is connected to the sampling chamber (220) through a suction pipe (260). The side of the sample cell (230) away from the suction pipe (260) is connected to the second negative pressure pump (212). The second negative pressure pump (212) is used to extract aluminum powder from the sampling chamber (220) into the sample cell (230) for particle size detection. A laser emitter (240) is positioned facing the sample cell (230) to emit parallel light toward the sample cell (230); A photodetector (250) is disposed on the side of the sample cell (230) opposite to the laser emitter (240) for receiving light passing through aluminum powder particles and emitting electrical signals.

5. The aluminum powder particle size detection mechanism according to claim 4, wherein The sample cell (230) includes a first dispersion partition (231) and a second dispersion partition. The first dispersion partition (231) and the side wall of the sample cell (230) near the exhaust pipe (260) form a first dispersion area (230a), which is connected to the exhaust pipe (260). The second dispersion partition and the side wall of the sample cell (230) near the second negative pressure pump (212) form a second dispersion area (230b), which is connected to the second negative pressure pump (212). Both the first dispersion partition (231) and the second dispersion partition have air holes arranged in an array.

6. The aluminum powder particle size detection mechanism according to claim 4, wherein The laser emitter (240) includes a plurality of optical components arranged in a straight line, the optical components including a laser (241) and a collimating lens (242) for forming parallel light from the beam of laser emitted by the laser (241) through the collimating lens (242).

7. The aluminum powder particle size detecting mechanism according to claim 4, wherein The photodetector (250) includes multiple photosensitive units, which are arranged in an array on the side of the sample cell (230) facing away from the laser emitter (240).

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