Slime water granularity online detection device based on optical detection

Abstract

The invention belongs to the technical field of coal slime water granularity detection, and particularly relates to an optical detection-based coal slime water granularity online detection device, which comprises a granularity detection box body, and a detection unit and a sample preparation unit which are fixedly connected in the granularity detection box body, the top and the bottom of the side wall of the granularity detection box body are respectively connected with a sample inlet pipe group and a sample outlet pipe group in a penetrating manner; the on-line particle size detection device has the advantages that coal slime water in a main process pipeline is introduced into the on-line particle size detection device through a branch arranged beside the main process pipeline, production is guaranteed to be uninterrupted on the basis of control of a sampling valve and a sample outlet valve, meanwhile, the coal slime water is homogenized and irradiated by exciting light, and the particle size of the coal slime water is detected on the basis of receiving and processing scattered signals. According to the method, sedimentation and concentration gradient are eliminated based on homogenization, so that the result is more accurate and more stable, the measurement result can truly reflect the average particle size distribution of the slime water within a period of time, and the method is of great significance to process optimization needing to be accurately controlled.

Description

Technical Field

[0001] This invention belongs to the field of coal slurry particle size detection technology, specifically an online coal slurry particle size detection device based on optical detection. Background Technology

[0002] Coal slurry flotation is a physical separation method. Its core objective is to separate useful clean coal from useless gangue or tailings in coal slurry. In the coal slurry treatment process, if coarse coal or gangue particles that are too large and do not meet the process requirements are mistakenly entered into subsequent stages where they should not be present, they will not be able to float due to their large mass and inability to be carried by air bubbles. Instead, they will be directly lost into the tailings, resulting in a decrease in clean coal yield.

[0003] The online particle size analyzer monitors the particle size distribution of the coal slime entering the flotation machine in real time, ensuring that it remains within the optimal particle size range. If a deviation in particle size is detected, the upstream grading equipment (such as hydrocyclones and screening machines) can be adjusted in a timely manner to provide the flotation machine with qualified coal slime particle size, thereby maximizing the recovery rate and quality of clean coal.

[0004] In existing technologies, online detection of coal slurry particle size mainly relies on two methods. One method uses online particle size sensors to directly measure the raw, uncertain state of the coal slurry in the pipeline. The results are heavily dependent on changes in instantaneous flow rate, concentration gradient, and particle settling conditions, making the accuracy susceptible to interference from process fluctuations. The other method uses image capture and recognition, which involves capturing particle images with a camera and then performing image segmentation and morphological analysis. However, due to the limited number of particles in a single frame, statistical differences are too large, resulting in good accuracy only at the base concentration and susceptibility to contamination. Furthermore, the image method requires that the particles be sparsely distributed and not overlapping, otherwise they cannot be identified, while coal slurry is a typical high-concentration slurry.

[0005] Therefore, the present invention provides an online particle size detection device for coal slurry water based on optical detection. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the online particle size detection device for coal slurry water based on optical detection, as described in the present invention, includes a particle size detection box and a detection unit and a sample preparation unit fixed in the particle size detection box; The top and bottom of the side wall of the particle size detection chamber are respectively connected to the sample inlet tube group and the sample outlet tube group; the sample inlet tube group is used to guide the coal slurry into the sample preparation unit, and then the detection unit detects the particle size of the coal slurry in the sample preparation unit; the sample outlet tube group is used to discharge the coal slurry after the test is completed. The detection unit is arranged adjacent to the sample preparation unit, and the detection unit generates a scattering signal based on the contact between the emitted excitation light and the particle molecules. The scattering signal is then received, processed, and analyzed to obtain the particle size of the coal slurry.

[0008] Preferably, the sample preparation unit includes a sample preparation tank, a second motor, and stirring blades. The sample preparation tank is fixedly connected to the middle of the particle size detection box. The second motor is located at the top of the sample preparation tank, and an output shaft is fixedly connected to the output end of the second motor. The stirring blades are fixedly connected to the output shaft. When coal slurry water enters the sample preparation tank through the sample inlet pipe group, the output of the second motor drives the stirring blades to rotate, thereby homogenizing the coal slurry water in the sample preparation tank. An optical window is provided on the side wall of the sample preparation cell relative to the detection unit. When the detection unit emits excitation light, the excitation light passes through the optical window and comes into contact with the particle molecules.

[0009] Preferably, the sample preparation unit further includes a sealing module, which is disposed at the top of the sample preparation pool. The sealing module includes a sealing cover; two sealing covers are provided, and the two sealing covers are closed together to seal the top opening of the sample preparation pool. A torsion arm is fixedly connected to the outer edge of the sealing cover, and the bottom of the torsion arm is hinged to the side wall of the sample preparation pool. Based on the hinge between the torsion arm and the side wall of the sample preparation pool, when the torsion arm is rotated, the two sealing covers rotate to expose the top opening of the sample preparation pool.

[0010] Preferably, the sealing module further includes a slider, a connecting arm, a limiting rod, and a first spring. A slide rail is fixedly connected to the side wall of the sample preparation pool. One end of the connecting arm is hinged to the middle of the torsion arm, and the other end is hinged to the slider. The other ends of the two connecting arms are coaxially hinged to the slider, and the slider is slidably connected in the slide rail. The limiting rod is fixedly connected to the bottom of the slider, and the slider passes through the end wall of the slide rail. The first spring is sleeved on the limiting rod, and the two ends of the first spring are respectively fixedly connected to the end wall of the slide rail and the slider.

[0011] Preferably, the particle size detection chamber is further slidably connected to a top cover, and the output shaft passes through the top cover; a straight rod is fixedly connected to the top cover, a fixing plate is provided on the top of the top cover, and the straight rod passes through the fixing plate; a second spring is sleeved on the straight rod, and the two ends of the second spring are respectively fixedly connected to the fixing plate and the top cover; the second motor is fixedly connected to the fixing plate.

[0012] Preferably, an mounting plate and an extrusion plate are also fixedly connected to the inner wall of the particle size detection box. A first motor is fixedly connected to the mounting plate, and the output end of the first motor is fixedly connected to one end of the extrusion plate. The other end of the extrusion plate is used to extrude a fixing plate.

[0013] Preferably, a mounting bracket is fixedly connected to the middle of the particle size detection box, and the sample preparation pool and the detection unit are both fixedly connected to the mounting bracket, and a fixing bracket is also fixedly connected to the mounting bracket; A connecting rod is fixedly connected to the bottom of the top cover. The connecting rod passes through the top of the fixed bracket. A third spring is sleeved on the connecting rod, and the two ends of the third spring are respectively fixed to the top cover and the fixed bracket.

[0014] Preferably, the bottom of the top cover is also fixed with symmetrically arranged extrusion rods, and when the extrusion rods move radially with the top cover, the extrusion slider slides radially downward in the slide rail, driving the sealing cover to rotate and exposing the top opening of the sample preparation pool.

[0015] Preferably, a water inlet pipe is also connected through the top of the side wall of the particle size detection chamber. The water inlet pipe is connected to the top side wall of the sample preparation tank. The sample inlet tube group includes multiple sampling tubes, and the multiple sampling tubes are connected to the main sample inlet tube via a tee. The main sample inlet tube is connected to the top side wall of the sample preparation tank. The top two sides of the sample preparation pool are also connected to overflow pipes. The sample outlet pipe group includes a discharge pipe and a discharge main pipe. The top of the discharge pipe is connected to the bottom of the sample preparation pool, and the bottom of the discharge pipe is connected to the discharge main pipe. The bottoms of the two overflow pipes are connected to the discharge main pipe.

[0016] Preferably, the extrusion rod has a relief groove in the middle, and the straight rod passes through the relief groove.

[0017] The beneficial effects of this invention are as follows: 1. The online particle size detection device for coal slurry water based on optical detection described in this invention introduces coal slurry water from the main process pipeline into the online particle size detection device in this embodiment through a branch line set beside the main process pipeline. Based on the control of sampling valves and discharge valves, the flow of coal slurry water in the main process pipeline is not affected, ensuring uninterrupted production. Simultaneously, after homogenization, the coal slurry water entering the online particle size detection device is irradiated with excitation light. Based on the received scattered signal and the processing of the scattered signal, the particle size of the coal slurry water can be obtained. Homogenization eliminates sedimentation and concentration gradients, and measurement is performed in this stable and uniform environment, making the results more accurate and stable. The measurement results can truly reflect the average particle size distribution of coal slurry water over a period of time, rather than instantaneous results affected by flow field interference. This is of great significance for process optimization requiring precise control.

[0018] 2. The online particle size detection device for coal slurry water based on optical detection described in this invention, through a sealing cover, can prevent coal slurry water from splashing outside the sample preparation tank when the sample enters the tank. After the sealing cover is opened, the stirring blades enter the sample preparation tank from top to bottom. It can be inferred that the stirring blades and the sample preparation tank are separated when the coal slurry water sample is introduced. When the coal slurry water sample in the sample preparation tank reaches a certain volume, the top cover drives the second motor and the stirring blades connected to the second motor into the sample preparation tank. Therefore, the top cover can slide in the particle size detection chamber and is opposite to the sample preparation tank. When the top cover slides to the low position, it can re-close the top opening of the sample preparation tank and drive the stirring blades into the lower part of the sample preparation tank to homogenize the coal slurry water sample. This can prevent the kinetic energy of the coal slurry water sample from impacting the stirring blades, thereby avoiding impact wear on the stirring blades and extending the service life of the stirring blades. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a front view of the present invention; Figure 2 This is a perspective view of the detection unit and sample preparation unit in this invention; Figure 3 This is a side view of the detection unit and the sample preparation unit in this invention; Figure 4 This is a front view of the detection unit and the sample preparation unit in this invention; Figure 5 This is a perspective view of the sample preparation unit in this invention; Figure 6 This is a perspective view of the sample preparation tank and sealing module in this invention; Figure 7 This is a diagram showing the open state of the sealing cap in the sample preparation unit of this invention; Figure 8 This is a top view of the sample preparation unit and top cover in this invention; Figure 9 yes Figure 8 Sectional view at point AA; Figure 10 This is a schematic diagram of the state after the extrusion plate drives the top cover in this invention; In the diagram: 1. Particle size detection chamber; 11. Mounting bracket; 2. Detection unit; 3. Sample preparation tank; 31. Sealing cover; 32. Slide rail; 33. Slider; 34. Connecting arm; 35. Limiting rod; 36. First spring; 37. Optical window; 41. Water inlet pipe; 42. Sampling pipe; 43. Overflow pipe; 44. Discharge pipe; 45. Main discharge pipe; 5. Mounting plate; 51. First motor; 52. Extrusion plate; 53. Relief groove; 6. Fixing plate; 7. Second motor; 71. Output shaft; 72. Stirring blade; 73. Connecting frame; 8. Top cover; 81. Straight rod; 82. Second spring; 83. Connecting rod; 84. Extrusion rod; 9. Fixing bracket. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 10 As shown in the figure, the online particle size detection device for coal slurry water based on optical detection according to the embodiment of the present invention includes a particle size detection box 1 and a detection unit 2 and a sample preparation unit fixed in the particle size detection box 1. The top and bottom of the side wall of the particle size detection chamber 1 are respectively connected to the sample inlet tube group and the sample outlet tube group; the sample inlet tube group is used to guide the coal slurry into the sample preparation unit, and then the detection unit 2 detects the particle size of the coal slurry in the sample preparation unit; the sample outlet tube group is used to discharge the coal slurry after the test is completed. The detection unit 2 is arranged adjacent to the sample preparation unit. The detection unit 2 generates a scattering signal based on the contact between the emitted excitation light and the particle molecules. The scattering signal is then received, processed, and analyzed to obtain the particle size of the coal slurry.

[0023] In existing technologies, coal slurry particle size detection is based on online particle size sensors or directly using image capture and recognition. However, online particle size sensors are easily affected by changes in factors such as the instantaneous flow rate, concentration gradient, and particle settling conditions of the coal slurry in the pipeline, which makes their accuracy susceptible to interference from process fluctuations. Image capture and recognition is limited to low flow rates and sparsely distributed particles that cannot overlap, and has a large error for high-concentration coal slurry. Based on the above, in one embodiment of the present invention, a branch line is provided beside the main process pipeline, and the branch line is connected to the sampling pipe group. When the sampling valve on the sampling pipe group is opened, most of the coal slurry water still flows at high speed along the main process pipeline to ensure uninterrupted production. A small portion of the coal slurry water is drawn in by the sampling pump and introduced into the sample preparation unit in this embodiment for testing through the opened sampling valve. Before the coal slurry water enters the sample preparation unit, the outlet valve at the bottom of the sample preparation unit remains closed. After the coal slurry water in the sample preparation unit reaches a certain volume, the sampling valve is closed. Subsequently, the coal slurry water in the sample preparation unit is homogenized and then... The excitation light emitted from detection unit 2 contacts the particles in the coal slurry water within the sample preparation unit, generating a scattered signal. This scattered signal is then received and processed to calculate the coal slurry water particle size. The discharge valve is then opened, allowing the coal slurry water to be discharged through the discharge pipe assembly. Based on this, in this invention, a branch line located beside the main process pipeline introduces the coal slurry water from the main process pipeline into the online particle size detection device of this embodiment. Furthermore, the control of the sampling valve and discharge valve ensures that the flow of coal slurry water in the main process pipeline is not affected, guaranteeing uninterrupted production. Simultaneously, the flow of coal slurry water entering the online particle size detection device is controlled. After homogenization, coal slurry is irradiated with excitation light. Based on the received and processed scattered signals, the particle size of the coal slurry can be obtained. Homogenization eliminates sedimentation and concentration gradients. Measurements are then performed in this stable and uniform environment, resulting in more accurate and stable results. The measurement results accurately reflect the average particle size distribution of the coal slurry over a period of time, rather than instantaneous results affected by flow field interference. This is of great significance for process optimization requiring precise control. Furthermore, compared to image capture and recognition, the contact between the emitted excitation light and the homogenized coal slurry particles, through the principle of light scattering and optical models, allows for instantaneous particle size determination. The signal from high-concentration samples has a smaller statistical error than that of image capture and recognition, and the speed based on light signals improves the detection speed of coal slurry particle size. Based on the above, the online detection of coal slurry particles, based on the high sensitivity and intelligent features of weak light molecular detection technology, achieves accurate and rapid detection of coal slurry particle size. It achieves a high degree of integration and automation in sample collection, signal detection, data analysis and control communication, and has the advantages of strong real-time performance, high accuracy and high reliability. Combined with big data and deep learning algorithms, it realizes the transformation from "monitoring" to "prediction", providing strong support for the intelligent upgrading of coal preparation plants.

[0024] Specifically, the online detection process for coal slurry water includes: Sample collection: Coal slurry water samples are extracted from the main process pipeline. The sampling port is equipped with an anti-clogging mechanism to ensure that solid particles in the fluid do not settle. Based on the side branch setting, it is ensured that the main process pipeline can still operate normally during equipment maintenance and calibration, reducing the risk of production interruption. Sample preparation and mixing: The coal slurry water sample is introduced into the sample preparation tank 3 in the sample preparation unit. Equipped with a stirring mechanism, the coal slurry water sample in the sample preparation tank 3 is homogenized to avoid local aggregation or retention. Optical detection: After homogenization, the light source control unit in detection unit 2 preheats and stabilizes the laser diode or high-brightness LED to ensure that the light intensity fluctuation is less than 0.1%. The wavelength of the light source is selected according to the absorption spectrum of coal slurry particles to optimize the excitation efficiency and the quality of the scattering signal. The output mode of the light source can be switched between continuous and pulsed to achieve high-sensitivity detection of particles of different sizes. The light source forms a stable light spot through a collimating lens and enters the sample cell to generate weak light molecular scattering with the particles, thereby achieving high-precision signal acquisition.

[0025] Signal processing: The digital signal undergoes bandpass filtering and wavelet denoising algorithms to eliminate high-frequency interference and low-frequency drift. Baseline correction and amplitude normalization are then performed to maximize the recovery of the original optical signal characteristics. Using the Mie scattering model, signal intensities at different angles are fitted to extract parameters such as particle size and concentration. Overlapping signals are eliminated using deconvolution algorithms, reconstructing the distribution characteristics of the particle population. A machine learning-based recognition algorithm classifies the detected data to determine the type of coal slime particles (organic matter, minerals, fine mud, etc.). Classification accuracy is continuously optimized using a training set of samples, achieving self-learning capabilities.

[0026] Data analysis: Multi-channel signals are fused and processed in the DSP to output real-time particle size distribution curves and concentration change trends; the system software also has data fitting and anomaly detection functions, and can automatically adjust parameters when operating conditions change.

[0027] This embodiment also includes a control layer, and the logical structure of the control layer is that the system control layer adopts a PLC + edge server collaborative working mode.

[0028] PLC (Programmable Logic Controller): Responsible for the execution level control of equipment, such as pumps, valves, light source start / stop, cleaning pumps, and sensor data acquisition control. PLC adopts a high-speed ring network structure, which can realize real-time coordinated control of various execution units and ensure that the action response time is less than 50ms.

[0029] Edge server: Responsible for algorithm computation, status monitoring, data processing, anomaly detection, and communication management. The CPU runs multi-threaded control programs, which can simultaneously handle signal acquisition, data analysis, and alarm strategies.

[0030] The two exchange data in real time via a high-speed bus (EtherCAT or Modbus TCP) to ensure that control commands and detection status are synchronized and to avoid delays or conflicts.

[0031] like Figures 2 to 7As shown, the sample preparation unit includes a sample preparation tank 3, a second motor 7, and a stirring blade 72. The sample preparation tank 3 is fixedly connected to the middle of the particle size detection box 1. The second motor 7 is located at the top of the sample preparation tank 3, and an output shaft 71 is fixedly connected to the output end of the second motor 7. The stirring blade 72 is fixedly connected to the output shaft 71. When the coal slurry water enters the sample preparation tank 3 through the sample inlet pipe group, the output of the second motor 7 drives the stirring blade 72 to rotate, thereby homogenizing the coal slurry water in the sample preparation tank 3. The sample preparation cell 3 has an optical window 37 on its side wall relative to the detection unit 2. When the detection unit 2 emits excitation light, the excitation light passes through the optical window 37 and comes into contact with the particle molecules.

[0032] In existing technologies, the particle size of coal slurry is detected in the main process pipeline using online particle size sensors. However, the accuracy of these sensors is easily affected by variations in instantaneous flow rate, concentration gradient, and particle settling conditions within the pipeline, leading to interference from process fluctuations. In this embodiment, a small portion of the coal slurry sample is drawn from the main process pipeline via a side branch and introduced into the sample preparation unit of the online particle size detection device. Specifically, the introduced coal slurry sample enters the sample preparation tank 3 through an opened sampling valve. After the coal slurry sample reaches a certain volume, the stirring blades 72 are rotated by the second motor 7, and the stirring blades 72 are used to sift the coal slurry sample. Homogenization ensures a uniform particle distribution in the coal slurry sample within the sample preparation tank 3. Excitation light then passes through optical window 37 and contacts the uniformly distributed particles. When the excitation light contacts the particles, it generates scattered light, which is received by detection unit 2. Based on the reception and processing of the scattered light, and in conjunction with machine learning recognition algorithms, the detection data is classified to determine the particle size distribution of the coal slurry. This allows for accurate detection of the particle size in the coal slurry sample, characterizing the particle size of the coal slurry in the main process pipeline during this period. This enables timely detection of coarse particles in the system when the coal slurry particle size is too large, reducing the incorporation of oversized coarse particles into the coal slurry sorting system, ensuring the sorting effect of the coal slurry system, and improving the efficiency of coarse particle detection.

[0033] like Figures 5 to 7 As shown, the sample preparation unit also includes a sealing module, which is disposed on the top of the sample preparation pool 3. The sealing module includes a sealing cover 31. Two sealing covers 31 are provided, and the two sealing covers 31 are closed together to seal the top opening of the sample preparation pool 3. A torsion arm is fixed to the outer edge of the sealing cover 31. The bottom of the torsion arm is hinged to the side wall of the sample preparation pool 3. Based on the hinge between the torsion arm and the side wall of the sample preparation pool 3, when the torsion arm is rotated, the two sealing covers 31 rotate to expose the top opening of the sample preparation pool 3.

[0034] When the coal slurry sample enters the sample preparation tank 3 through the sampling valve and inlet tube assembly, it may splash out. In this embodiment, the sealing module can reduce or avoid splashing of the coal slurry sample when it enters the sample preparation tank 3. It is understood that the coal slurry sample has a complex composition, and if it splashes out, it may drip onto other parts of the device, causing contamination. Therefore, it is necessary to develop an additional cleaning process for the outside of the sample preparation tank 3. Moreover, coal slurry exposed to air will dry and form scale quickly. If it is not cleaned in time, it may be difficult to clean. In this embodiment, a sealing cover 31 is used to seal the sample preparation tank 3. The top opening is sealed so that when the coal slurry water enters the sample preparation tank 3 through the sample inlet tube assembly, the splashed coal slurry water is blocked by the sealing cover 31 and will not splash out of the sample preparation tank 3, thus preventing other parts of the device from being contaminated by the coal slurry water. It should also be noted that in this embodiment, the two sealing covers 31, when combined, can completely seal the top opening of the sample preparation tank 3. After the coal slurry water sample in the sample preparation tank 3 reaches a certain volume, it needs to be homogenized using the stirring blades 72. Therefore, in this embodiment, the sealing cover 31 can rotate based on the hinge between the torsion arm and the side wall of the sample preparation tank 3. Figure 5 As shown, when the two sealing caps 31 rotate outward synchronously, the top opening of the sample preparation tank 3 is exposed. At this time, the stirring blade 72 moves downward radially into the sample preparation tank 3. Based on the second motor 7 driving the stirring blade 72 to rotate, the coal slurry water sample in the sample preparation tank 3 can be homogenized, so that the particles in the coal slurry water sample are evenly distributed, which facilitates the subsequent particle size detection of the coal slurry water sample and improves the accuracy of particle size detection.

[0035] like Figures 5 to 7 As shown, the sealing module further includes a slider 33, a connecting arm 34, a limiting rod 35, and a first spring 36. A slide rail 32 is fixedly connected to the side wall of the sample preparation pool 3. One end of the connecting arm 34 is hinged to the middle of the torsion arm, and the other end is hinged to the slider 33. The other ends of the two connecting arms 34 are coaxially hinged to the slider 33, and the slider 33 is slidably connected in the slide rail 32. The limiting rod 35 is fixedly connected to the bottom of the slider 33, and the slider 33 passes through the end wall of the slide rail 32. The first spring 36 is sleeved on the limiting rod 35, and the two ends of the first spring 36 are respectively fixedly connected to the end wall of the slide rail 32 and the slider 33.

[0036] Based on the above, the sealing cover 31, driven by the torsion arm, can expose the top opening of the sample preparation cell 3 and close the top opening of the sample preparation cell 3. In this embodiment, in the initial state, driven by the elastic force of the first spring 36, the slider 33 is located at the top of the slide rail 32. Based on the hinged state of the slider 33 and the connecting arm 34, the two sealing covers 31 can rotate synchronously under the drive of the connecting arm 34, thereby closing the top opening of the sample preparation cell 3. When the slider 33 is subjected to radial downward pressure, the slider 33 slides downward in the slide rail 32, and at the same time changes the included angle of the two connecting arms 34. It can be understood that in the initial state, since the slider 33 drives the two connecting arms 34 to be located at the top of the slide rail 32, and the torsion arm is hinged to the side wall of the sample preparation cell 3, the included angle of the two connecting arms 34 is an acute angle. When the slider 33 is subjected to radial outward pressure, it will also synchronously drive the two connecting arms 34 to move. In conjunction with the hinged state of the connecting arm 34 and the torsion arm, the included angle of the two connecting arms 34 is a flat angle. Figures 5 to 6 As shown, at this time, the two sealing caps 31 rotate under the action of the connecting arm 34 and the torsion arm, exposing the top opening of the sample preparation pool 3. At this time, the stirring blade 72 can pass through the top opening of the sample preparation pool 3 from top to bottom and move to the lower part of the sample preparation pool 3 to homogenize the coal slurry water sample in the sample preparation pool 3. In addition, as mentioned above, in this embodiment, the sealing cap 31 can prevent the coal slurry water sample from splashing to the outside of the sample preparation pool 3 when it enters the sample preparation pool 3. After the sealing cap 31 is opened, the stirring blade 72 enters the sample preparation pool 3 from top to bottom. It can be inferred that when the coal slurry water sample is introduced, the stirring blade 72 is separated from the sample preparation pool 3. This can prevent the coal slurry water sample with kinetic energy from impacting the stirring blade 72, thereby preventing the stirring blade 72 from being worn by impact and extending the service life of the stirring blade 72. The bottom of the slider 33 is fixedly or threadedly connected to the limiting rod 35, and the limiting rod 35 passes through the end wall of the slide rail 32. It can be understood that the sliding cooperation between the slider 33 and the slide rail 32 is limited by the limiting rod 35 to radially limit the slider 33, ensuring the connection state between the slider 33 and the slide rail 32. In addition, the limiting rod 35 is also used to load the first spring 36.

[0037] like Figures 2 to 5 As shown, a top cover 8 is slidably connected inside the particle size detection box 1, and the output shaft 71 passes through the top cover 8; a straight rod 81 is fixedly connected to the top cover 8, and a fixing plate 6 is provided on the top of the top cover 8, and the straight rod 81 passes through the fixing plate 6; a second spring 82 is sleeved on the straight rod 81, and the two ends of the second spring 82 are respectively fixedly connected to the fixing plate 6 and the top cover 8; the second motor 7 is fixedly connected to the fixing plate 6.

[0038] It is understood that in this embodiment, the stirring blade 72 is independent of the sample preparation tank 3 when the coal slurry sample is introduced into the sample preparation tank 3. That is, when the stirring blade 72 is introduced into the sample preparation tank 3, it is located outside the sample preparation tank 3. Only when the coal slurry sample in the sample preparation tank 3 reaches a certain volume does the stirring blade 72 enter the sample preparation tank 3 and stir and homogenize the coal slurry sample. Therefore, in this embodiment, the second motor 7 is fixed on the fixing plate 6. When the coal slurry sample in the sample preparation tank 3 reaches a certain volume, it is activated by the top cover 8. The second motor 7 and the stirring blade 72 connected to the second motor 7 are driven into the sample preparation tank 3. Therefore, the top cover 8 can slide in the particle size detection box 1 and is opposite to the sample preparation tank 3. When the top cover 8 slides to the low position, it can re-close the top opening of the sample preparation tank 3. At the same time, it drives the stirring blade 72 into the lower part of the sample preparation tank 3 to homogenize the coal slurry water sample. When the top cover 8 slides to the high position, the stirring blade 72 moves out of the sample preparation tank 3, and the sealing cover 31 can rotate and close the top opening of the sample preparation tank 3. Understandably, when the coal slurry water sample enters the sample preparation tank 3 through the sample inlet tube assembly, the sealing cover 31 closes and seals the top opening of the sample preparation tank 3 under the action of the torsion arm. At this time, the top cover 8 is located at the top of the sample preparation tank 3. Since the second motor 7 is fixedly connected to the top cover 8, the stirring blade 72 connected to the output end of the second motor 7 is also located at the top of the sample preparation tank 3. When the coal slurry water sample in the sample preparation tank 3 reaches a certain volume, the top cover 8 is controlled to move downward radially based on the control layer. During this process, the torsion arm drives the sealing cover 31 to rotate synchronously to expose the top opening of the sample preparation tank 3. Subsequently, driven by the top cover 8, the stirring blade 72 passes through the top opening of the sample preparation tank 3 and moves to the middle and lower part of the sample preparation tank 3, thereby homogenizing the coal slurry water sample. When the stirring blade 72 is located in the middle and lower part of the sample preparation tank 3, the top cover 8 is in a low position and re-closes the top opening of the sample preparation tank 3 to prevent the coal slurry water sample from splashing out from the top opening of the sample preparation tank 3 during the stirring process.

[0039] like Figures 2 to 10 As shown, an installation plate 5 and an extrusion plate 52 are also fixedly connected to the inner wall of the particle size detection box 1. A first motor 51 is fixedly connected to the installation plate 5. The output end of the first motor 51 is fixedly connected to one end of the extrusion plate 52. The other end of the extrusion plate 52 is used to extrude the fixing plate 6.

[0040] like Figures 2 to 10 As shown, a mounting bracket 11 is fixedly connected to the middle of the particle size detection box 1, and the sample preparation pool 3 and the detection unit 2 are both fixedly connected to the mounting bracket 11. A fixing bracket 9 is also fixedly connected to the mounting bracket 11. A connecting rod 83 is fixedly connected to the bottom of the top cover 8. The connecting rod 83 passes through the top of the fixed bracket 9. A third spring is sleeved on the connecting rod 83, and the two ends of the third spring are respectively fixed to the top cover 8 and the fixed bracket 9.

[0041] It is understandable that, since the top cover 8 needs to slide within the particle size detection chamber 1, and needs to ensure that the stirring blades 72 and the top cover 8 separate from the sample preparation tank 3 when the coal slurry water sample enters the sample preparation tank 3, and that the gap between the top cover 8 and the top of the sample preparation tank 3 allows the sealing cover 31 to move dynamically when it rotates, and furthermore, when the sealing cover 31 rotates to expose the top opening of the sample preparation tank 3, the top cover 8 can be radially displaced to close the top opening of the sample preparation tank 3, while allowing the stirring blades 72 to enter the lower middle part of the sample preparation tank 3, in this embodiment, when the sealing cover 31 rotates to expose the top opening of the sample preparation tank 3, the control layer drives the first motor 51 to start, the first motor 51 drives the extrusion plate 52 to rotate, and the extrusion plate 5... After rotation, pressure is applied to the fixed plate 6 at its end, causing the fixed plate 6 to move downwards. It is worth noting that since the elastic force of the second spring 82 is greater than that of the third spring, when the fixed plate 6 is subjected to downward pressure, the third spring will compress before the second spring 82. At this time, the connecting rod 83 passes through the mounting bracket 11. After the top cover 8 re-closes the top opening of the sample preparation cell 3, due to the top limit of the sample preparation cell 3, the top cover 8 cannot continue to move downwards, and the third spring is fully compressed. With the continuous pressure of the extrusion plate 52, the second spring 82 then begins to compress. At the same time, the fixed plate 6 and the top cover 8 gradually approach each other, and the second spring 82 sleeved on the straight rod 81 will compress (and the output shaft 71 will also be compressed). A second spring 82 is fitted to balance the forces at both ends of the fixed plate 6 during displacement. The output shaft 71 at the bottom of the second motor 7 passes through the top cover 8 and drives the stirring blade 72 to extend into the lower middle part of the sample preparation tank 3, thereby homogenizing the coal slurry sample. It is worth noting that in this embodiment, the action of the top cover 8 abutting against the top opening of the sample preparation tank 3 and the action of the stirring blade 72 extending into the lower middle part of the sample preparation tank 3 are carried out in steps. First, the top cover 8 is indirectly driven to abut against the top of the sample preparation tank 3 based on the extrusion plate 52. At this time, the stirring blade 72 is at the top of the sample preparation tank 3 and has not reached the predetermined position. If the volume of the coal slurry sample in the sample preparation tank 3 is too small, it is impossible to homogenize the coal slurry sample. Then, the extrusion plate 52 directly drives the fixed plate. 6. The second motor 7 drives the stirring blade 72 to continue moving downward radially, thereby reaching the predetermined position to homogenize the coal slurry water sample. Based on the above, in this embodiment, the pressing plate 52 applies pressure to the fixing plate 6, and with the top cover 8 and the mounting bracket 11, as well as the second spring 82 and the third spring arranged therein, the stirring blade 72 is separated from the sample preparation tank 3 when the coal slurry water is injected, so as to avoid additional wear caused by the impact of the coal slurry water and affect the service life of the stirring blade 72. When it is necessary to homogenize the coal slurry water sample, the top cover 8 can be connected to the top opening of the sample preparation tank 3 in sequence to achieve resealing, and then the stirring blade 72 can be extended into the middle and lower part of the sample preparation tank 3 to achieve homogenization of the coal slurry water sample.

[0042] like Figures 2 to 10As shown, the bottom of the top cover 8 is also fixed with symmetrically arranged extrusion rods 84, and when the extrusion rods 84 move radially with the top cover 8, the extrusion slider 33 slides radially downward in the slide rail 32, driving the sealing cover 31 to rotate and exposing the top opening of the sample preparation pool 3.

[0043] When homogenization of the coal slurry sample in the sample preparation tank 3 is required, since the top opening of the sample preparation tank 3 is sealed by the sealing cap 31 when the coal slurry sample is injected, it is necessary to ensure that the sealing cap 31 opens to expose the top opening of the sample preparation tank 3 when the top cover 8 and the stirring blade 72 move downward radially. Otherwise, the stirring blade 72 will collide with the sealing cap 31 as the top cover 8 moves downward, causing the stirring blade 72 to fail to fall accurately and in time into the lower part of the sample preparation tank 3, thus making it impossible to homogenize the coal slurry sample in the sample preparation tank 3. In this embodiment, when the extrusion plate 52 is fixed... After the plate 6 applies pressure, it causes the top cover 8 to move downward and first abut against the top of the sample preparation tank 3. During this process, the extrusion rod 84 set at the lower part of the top cover 8 will contact the slider 33 first before the stirring blade 72, so that the slider 33 is subjected to vertical downward pressure and then slides downward in the slide rail 32. With the help of the connecting arm 34 and the first spring 36, the two sealing covers 31 are rotated and opened, exposing the top opening of the sample preparation tank 3. At this time, the stirring blade 72 will no longer be blocked by the sealing cover 31, so it can enter the middle and lower part of the sample preparation tank 3 along with the top cover 8 and the output shaft 71 and perform homogenization treatment on the coal slurry water. It is worth noting that during the process of the extrusion rod 84 pressing the slider 33 downward, since the rotation and opening of the sealing cover 31 are related to the position of the slider 33, the opening angle of the sealing cover 31 gradually increases as the extrusion rod 84 applies pressure to the slider 33 and causes the slider 33 to slide downward. It needs to be determined that when the sealing cover 31 is opened to a certain angle, the bottom of the stirring blade 72 and the top of the sample preparation tank 3 are at the same level, and at this time the gap between the two sealing covers 31 is sufficient to allow the stirring blade 72 to pass through the two sealing covers 31 without obstructing the stirring blade 72.

[0044] like Figures 1 to 10 As shown, a water inlet pipe 41 is also connected through the top of the side wall of the particle size detection chamber 1. The water inlet pipe 41 is connected to the top side wall of the sample preparation tank 3. The sample inlet pipe group includes multiple sampling pipes 42, and the multiple sampling pipes 42 are connected to the main sample inlet pipe via a tee. The main sample inlet pipe is connected to the top side wall of the sample preparation tank 3. The top two sides of the sample preparation pool 3 are also connected to overflow pipes 43. The sample outlet pipe group includes a discharge pipe 44 and a discharge main pipe 45. The top of the discharge pipe 44 is connected to the bottom of the sample preparation pool 3, and the bottom of the discharge pipe 44 is connected to the discharge main pipe 45. The bottoms of the two overflow pipes 43 are connected to the discharge main pipe 45.

[0045] Because coal slurry is a high-concentration fluid with a complex composition including particles of various sizes and shapes, the sample preparation tank 3 needs to be cleaned after particle size analysis of a batch of coal slurry samples. This is to prevent residual particles from contaminating subsequent batches of coal slurry samples and to prevent residual particles from adhering to the inner wall of the sample preparation tank 3 for an extended period. In this embodiment, after particle size analysis of the coal slurry sample in the sample preparation tank 3 is completed, the discharge valve is opened by the control layer. At this time, the coal slurry sample in the sample preparation tank 3 is discharged through the discharge pipe 44 to the main discharge pipe 45. Then, the sample outlet valve is closed and the inlet valve is opened, and clean water is discharged from the inlet pipe 41 into the sample preparation tank 3 to rinse the residual coal slurry and particles in the sample preparation tank 3. After rinsing, the sample outlet valve is opened again, so that the rinsing waste liquid is also discharged into the discharge main pipe 45 through the discharge pipe 44. At this point, the particle size detection of a batch of coal slurry samples is completed. Generally speaking, after the detection cycle is over, the automatic cleaning stage begins. The cleaning liquid is automatically drained after circulating 3-5 times. After that, the light source is turned off, the sampling pump stops running, and the device saves the operation log and archives the detection data.

[0046] It is worth noting that since the stirring blades 72 and the output shaft 71 will also be covered with coal slurry and particles in the sample preparation tank 3, the stirring blades 72 and the output shaft 71 will still be in the sample preparation tank 3 when the sample preparation tank 3 is rinsed. When clean water enters the sample preparation tank 3, the clean water will also clean the stirring blades 72 and the output shaft 71. After the cleaning is completed, the extrusion plate 52 is reset based on the control layer. Under the action of the second spring 82 and the third spring, the top cover 8 and the fixing plate 6 are reset. At the same time, the second motor 7, the output shaft 71 and the stirring blades 72 will also be reset along with the fixing plate 6 and the top cover 8.

[0047] like Figures 2 to 3 As shown, a relief groove 53 is provided in the middle of the extrusion rod 84, and the straight rod 81 passes through the relief groove 53.

[0048] Working Principle: Based on the branch line set on the side of the main process pipeline, the branch line is connected to the sampling pipe group. When the sampling valve on the sampling pipe group is opened, most of the coal slurry water still flows at high speed along the main process pipeline to ensure uninterrupted production. A small portion of the coal slurry water is drawn in by the sampling pump and introduced into the sample preparation unit in this embodiment for detection through the opened sampling valve. Before the coal slurry water enters the sample preparation unit, the outlet valve at the bottom of the sample preparation unit remains closed. After the coal slurry water in the sample preparation unit reaches a certain volume, the sampling valve is closed. Subsequently, the coal slurry water in the sample preparation unit is homogenized and then injected by the detection unit 2. The emitted excitation light contacts the particles in the coal slurry water within the sample preparation unit, generating a scattered signal. This scattered signal is then received and processed to calculate the coal slurry water particle size. The discharge valve is then opened, allowing the coal slurry water to be discharged through the discharge pipe assembly. A branch line located beside the main process pipeline introduces the coal slurry water from the main process pipeline into the online particle size detection device in this embodiment. The control of the sampling and discharge valves ensures that the flow of coal slurry water in the main process pipeline is not affected, guaranteeing uninterrupted production. Furthermore, the coal slurry water entering the online particle size detection device is homogenized and then... By irradiating the coal slurry with excitation light and processing the received scattered signals, the particle size can be obtained. Homogenization eliminates sedimentation and concentration gradients, and measurements are then taken in this stable and uniform environment, resulting in more accurate and stable results. The measurements accurately reflect the average particle size distribution of the coal slurry over a period of time, rather than instantaneous results affected by flow field interference. This is significant for process optimization requiring precise control. Furthermore, compared to image capture and recognition, the contact between the emitted excitation light and the homogenized coal slurry particles, through light scattering principles and optical models, allows for the instantaneous processing of high-concentration samples. The signal has a statistical error smaller than that of image capture and recognition, and the speed of light signals improves the detection speed of coal slurry particle size. Based on the above, the online detection of coal slurry particles, based on the high sensitivity and intelligent features of weak light molecular detection technology, achieves accurate and rapid detection of coal slurry particle size. It has achieved a high degree of integration and automation in sample collection, signal detection, data analysis and control communication, and has the advantages of strong real-time performance, high accuracy and high reliability. Combined with big data and deep learning algorithms, it realizes the transformation from "monitoring" to "prediction", providing strong support for the intelligent upgrading of coal preparation plants.A small portion of coal slurry sample is drawn from the main process pipeline via a side branch and introduced into the sample preparation unit of the online particle size analysis device. Specifically, the introduced coal slurry sample enters the sample preparation tank 3 through an opened sampling valve. After the coal slurry sample reaches a certain volume, the stirring blades 72 are driven by the second motor 7 to rotate, homogenizing the coal slurry sample and ensuring a uniform particle distribution within the sample preparation tank 3. Subsequently, excitation light passes through the optical window 37 and contacts the uniformly distributed particles. When the excitation light comes into contact with the particles, it generates scattered light, which is then received by detection unit 2. Based on the reception and processing of the scattered light, and in conjunction with machine learning recognition algorithms, the detection data is classified to determine the particle size distribution of the coal slime. This allows for accurate detection of the particle size in the coal slime water sample, characterizing the particle size of the coal slime water in the main process pipeline during this period. This enables timely detection of coarse particle issues when the coal slime water particle size is too large, reducing the amount of oversized coarse particles mixed into the coal slime sorting system feed, ensuring the sorting effect of the coal slime system, and improving the efficiency of coarse particle detection.

[0049] Based on the sealing module's ability to reduce or prevent coal slurry water sample splashing when entering the sample preparation tank 3, it is understood that the coal slurry water sample has a complex composition, and if splashed, it may drip onto other parts of the device, causing contamination. This necessitates an additional cleaning process for the exterior of the sample preparation tank 3. Furthermore, coal slurry water exposed to air dries quickly and forms scale, which may be difficult to clean if not cleaned promptly. In this embodiment, a sealing cap 31 is used to seal the top opening of the sample preparation tank 3. When the coal slurry water enters the sample preparation tank 3 through the sample inlet pipe assembly, the splashed coal slurry water is blocked by the sealing cap 31 and will not splash out of the sample preparation tank 3, thus preventing contamination of other parts of the device by the coal slurry water. It should also be noted that in this embodiment... After the two sealing caps 31 are combined, they can completely seal the top opening of the sample preparation tank 3. After the coal slurry water sample in the sample preparation tank 3 reaches a certain volume, it needs to be homogenized based on the stirring blade 72. The sealing caps 31 can rotate based on the hinge between the torsion arm and the side wall of the sample preparation tank 3. When the two sealing caps 31 rotate outward synchronously, the top opening of the sample preparation tank 3 is exposed. At this time, the stirring blade 72 moves downward radially into the sample preparation tank 3. Based on the second motor 7 driving the stirring blade 72 to rotate, the coal slurry water sample in the sample preparation tank 3 can be homogenized, so that the particles in the coal slurry water sample are evenly distributed, which facilitates the subsequent particle size detection of the coal slurry water sample and improves the accuracy of particle size detection.

[0050] In the initial state, driven by the elastic force of the first spring 36, the slider 33 is located at the top of the slide rail 32. Based on the hinged state of the slider 33 and the connecting arm 34, the two sealing covers 31 can rotate synchronously under the drive of the connecting arm 34, thereby closing the top opening of the sample preparation cell 3. When the slider 33 is subjected to radially downward pressure, the slider 33 slides downward in the slide rail 32, simultaneously changing the included angle of the two connecting arms 34. It can be understood that in the initial state, since the slider 33 drives the two connecting arms 34 to be located at the top of the slide rail 32, and the torsion arm is hinged to the side wall of the sample preparation cell 3, the included angle of the two connecting arms 34 is an acute angle. When the slider 33 is subjected to radially outward pressure, it will also synchronously drive the two connecting arms 34 to move. Combined with the hinged state of the connecting arm 34 and the torsion arm, the two sealing covers 31 can rotate synchronously under the drive of the connecting arm 34, thereby closing the top opening of the sample preparation cell 3. The included angle of the connecting arm 34 is a flat angle. At this time, the two sealing covers 31 rotate under the action of the connecting arm 34 and the torsion arm, and expose the top opening of the sample preparation pool 3. At this time, the stirring blade 72 can pass through the top opening of the sample preparation pool 3 from top to bottom and move to the lower part of the sample preparation pool 3 to homogenize the coal slurry water sample in the sample preparation pool 3. In addition, the sealing cover 31 can prevent the coal slurry water sample from splashing to the outside of the sample preparation pool 3 when it enters the sample preparation pool 3. After the sealing cover 31 is opened, the stirring blade 72 enters the sample preparation pool 3 from top to bottom. It can be inferred that the stirring blade 72 is separated from the sample preparation pool 3 when the coal slurry water sample is injected. This can prevent the coal slurry water sample with kinetic energy from impacting the stirring blade 72, thereby preventing the stirring blade 72 from impact wear and extending the service life of the stirring blade 72. The second motor 7 is fixed on the fixed plate 6. When the coal slurry water sample in the sample preparation tank 3 reaches a certain volume, the top cover 8 drives the second motor 7 and the stirring blade 72 connected to the second motor 7 into the sample preparation tank 3. Therefore, the top cover 8 can slide in the particle size detection box 1 and is opposite to the sample preparation tank 3. When the top cover 8 slides to the low position, it can re-close the top opening of the sample preparation tank 3 and drive the stirring blade 72 into the lower part of the sample preparation tank 3 to homogenize the coal slurry water sample. When the top cover 8 slides to the high position, the stirring blade 72 moves out of the sample preparation tank 3, and the sealing cover 31 can rotate and close the top opening of the sample preparation tank 3. Understandably, when the coal slurry water sample enters the sample preparation tank 3 through the sample inlet tube assembly, the sealing cover 31 closes and seals the top opening of the sample preparation tank 3 under the action of the torsion arm. At this time, the top cover 8 is located at the top of the sample preparation tank 3. Since the second motor 7 is fixedly connected to the top cover 8, the stirring blade 72 connected to the output end of the second motor 7 is also located at the top of the sample preparation tank 3. When the coal slurry water sample in the sample preparation tank 3 reaches a certain volume, the top cover 8 is controlled to move downward radially based on the control layer. During this process, the torsion arm drives the sealing cover 31 to rotate synchronously to expose the top opening of the sample preparation tank 3. Subsequently, driven by the top cover 8, the stirring blade 72 passes through the top opening of the sample preparation tank 3 and moves to the middle and lower part of the sample preparation tank 3, thereby homogenizing the coal slurry water sample. When the stirring blade 72 is located in the middle and lower part of the sample preparation tank 3, the top cover 8 is in a low position and re-closes the top opening of the sample preparation tank 3 to prevent the coal slurry water sample from splashing out from the top opening of the sample preparation tank 3 during the stirring process.

[0051] When the sealing cover 31 rotates to expose the top opening of the sample preparation cell 3, the control layer drives the first motor 51 to start. The first motor 51 drives the extrusion plate 52 to rotate. After the extrusion plate 52 rotates, its end applies pressure to the fixing plate 6, causing the fixing plate 6 to move downward. It is worth noting that since the elastic force of the second spring 82 is greater than that of the third spring, when the fixing plate 6 is subjected to downward pressure, the third spring will compress before the second spring 82. At this time, the connecting rod 83 passes through the mounting bracket 11. When the top cover 8 re-closes the top opening of the sample preparation cell 3, due to the pressure from the sample preparation cell 3... The top limit is reached, at which point the top cover 8 can no longer move downwards, and the third spring is fully compressed. With the continuous pressure from the extrusion plate 52, the second spring 82 then begins to compress. Simultaneously, the fixing plate 6 and the top cover 8 gradually approach each other, and the second spring 82, sleeved on the straight rod 81, will compress (a second spring 82 is also sleeved on the output shaft 71, balancing the forces on both ends of the fixing plate 6 during displacement). The output shaft 71 at the bottom of the second motor 7 penetrates the top cover 8 and drives the stirring blades 72 to extend into the lower middle part of the sample preparation tank 3, thereby homogenizing the coal slurry water sample. It is worth noting that this... In this embodiment, the action of the top cover 8 abutting against the top opening of the sample preparation tank 3 and the action of the stirring blade 72 extending into the lower part of the sample preparation tank 3 are performed in steps. First, the top cover 8 is indirectly driven by the extrusion plate 52 to abut against the top of the sample preparation tank 3. At this time, the stirring blade 72 is at the top of the sample preparation tank 3 and has not reached the predetermined position. If the volume of the coal slurry water sample in the sample preparation tank 3 is too small, it is impossible to homogenize the coal slurry water sample. Then, the extrusion plate 52 directly drives the fixed plate 6 to move radially downward, and the second motor 7 drives the stirring blade 72 to continue to move downward, thereby reaching the predetermined position and homogenizing the coal slurry water sample. Based on the above, in this embodiment, the pressing plate 52 applies pressure to the fixing plate 6, in conjunction with the top cover 8 and the mounting bracket 11, as well as the second spring 82 and the third spring arranged therein, so that the stirring blade 72 is separated from the sample preparation tank 3 when the coal slurry water is injected, avoiding additional wear caused by the impact of the coal slurry water and affecting the service life of the stirring blade 72. When it is necessary to homogenize the coal slurry water sample, the top cover 8 can be made to abut against the top opening of the sample preparation tank 3 in sequence to achieve resealing, and then the stirring blade 72 can be made to extend into the middle and lower part of the sample preparation tank 3 to achieve homogenization of the coal slurry water sample.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online particle size detection device for coal slime water based on optical detection, characterized in that: It includes a particle size detection chamber (1) and a detection unit (2) and a sample preparation unit fixed in the particle size detection chamber (1); The top and bottom of the side wall of the particle size detection chamber (1) are respectively connected to the sample inlet tube group and the sample outlet tube group; the sample inlet tube group is used to guide the coal slurry into the sample preparation unit, and then the detection unit (2) detects the particle size of the coal slurry in the sample preparation unit; the sample outlet tube group is used to discharge the coal slurry after the detection is completed. The detection unit (2) is arranged adjacent to the sample preparation unit. The detection unit (2) generates a scattering signal based on the contact between the emitted excitation light and the particle molecules. The scattering signal is then received, processed, and analyzed to obtain the particle size of the coal slurry.

2. The online particle size detection device for coal slime water based on optical detection according to claim 1, characterized in that: The sample preparation unit includes a sample preparation tank (3), a second motor (7), and a stirring blade (72). The sample preparation tank (3) is fixedly connected to the middle of the particle size detection box (1). The second motor (7) is set on the top of the sample preparation tank (3), and the output end of the second motor (7) is fixedly connected to an output shaft (71). The stirring blade (72) is fixedly connected to the output shaft (71). When the coal slurry water enters the sample preparation tank (3) through the sample inlet pipe group, the output of the second motor (7) drives the stirring blade (72) to rotate, and homogenizes the coal slurry water in the sample preparation tank (3). The sample preparation cell (3) has an optical window (37) on its side wall relative to the detection unit (2). When the detection unit (2) emits excitation light, the excitation light passes through the optical window (37) and comes into contact with the particle molecules.

3. The online particle size detection device for coal slime water based on optical detection according to claim 2, characterized in that: The sample preparation unit also includes a sealing module, which is set on the top of the sample preparation pool (3). The sealing module includes a sealing cover (31). Two sealing covers (31) are provided, and the two sealing covers (31) are closed together to seal the top opening of the sample preparation pool (3). A torsion arm is fixed to the outer edge of the sealing cover (31). The bottom of the torsion arm is hinged to the side wall of the sample preparation pool (3). Based on the hinge between the torsion arm and the side wall of the sample preparation pool (3), when the torsion arm rotates, the two sealing covers (31) rotate to expose the top opening of the sample preparation pool (3).

4. The online particle size detection device for coal slurry water based on optical detection according to claim 3, characterized in that: The sealing module also includes a slider (33), a connecting arm (34), a limiting rod (35), and a first spring (36). A slide rail (32) is fixedly connected to the side wall of the sample preparation pool (3). One end of the connecting arm (34) is hinged to the middle of the torsion arm, and the other end is hinged to the slider (33). The other ends of the two connecting arms (34) are coaxially hinged to the slider (33), and the slider (33) is slidably connected in the slide rail (32). The limiting rod (35) is fixedly connected to the bottom of the slider (33), and the slider (33) passes through the end wall of the slide rail (32). The first spring (36) is sleeved on the limiting rod (35), and the two ends of the first spring (36) are respectively fixedly connected to the end wall of the slide rail (32) and the slider (33).

5. The online particle size detection device for coal slime water based on optical detection according to claim 4, characterized in that: The particle size detection box (1) is also slidably connected to a top cover (8), and the output shaft (71) passes through the top cover (8); a straight rod (81) is fixedly connected to the top cover (8), a fixing plate (6) is provided on the top of the top cover (8), and the straight rod (81) passes through the fixing plate (6). A second spring (82) is sleeved on the straight rod (81), and the two ends of the second spring (82) are fixedly connected to the fixing plate (6) and the top cover (8) respectively; the second motor (7) is fixedly connected to the fixing plate (6).

6. The online particle size detection device for coal slurry water based on optical detection according to claim 5, characterized in that: The inner wall of the particle size detection box (1) is also fixed with an installation plate (5) and an extrusion plate (52). A first motor (51) is fixed on the installation plate (5). The output end of the first motor (51) is fixed to one end of the extrusion plate (52). The other end of the extrusion plate (52) is used to extrude the fixing plate (6).

7. The online particle size detection device for coal slurry water based on optical detection according to claim 6, characterized in that: The particle size detection box (1) is fixedly connected to the middle of the mounting bracket (11), and the sample preparation pool (3) and the detection unit (2) are both fixedly connected to the mounting bracket (11). The mounting bracket (11) is also fixedly connected to the fixing bracket (9). A connecting rod (83) is fixedly connected to the bottom of the top cover (8). The connecting rod (83) passes through the top of the fixed bracket (9). A third spring is sleeved on the connecting rod (83), and the two ends of the third spring are fixedly connected to the top cover (8) and the fixed bracket (9) respectively.

8. The online particle size detection device for coal slurry water based on optical detection according to claim 7, characterized in that: The bottom of the top cover (8) is also fixed with symmetrically arranged extrusion rods (84), and when the extrusion rods (84) move radially with the top cover (8), the extrusion slider (33) slides radially downward in the slide rail (32), driving the sealing cover (31) to rotate and exposing the top opening of the sample preparation pool (3).

9. The online particle size detection device for coal slime water based on optical detection according to claim 8, characterized in that: The top of the side wall of the particle size detection box (1) is also connected to a water inlet pipe (41), which is connected to the top side wall of the sample preparation tank (3). The sample inlet pipe group includes multiple sampling pipes (42), and the multiple sampling pipes (42) are connected to the main sample inlet pipe via a tee. The main sample inlet pipe is connected to the top side wall of the sample preparation tank (3). The top two sides of the sample preparation pool (3) are also connected to overflow pipes (43). The sample outlet pipe group includes a discharge pipe (44) and a discharge main pipe (45). The top of the discharge pipe (44) is connected to the bottom of the sample preparation pool (3), and the bottom of the discharge pipe (44) is connected to the discharge main pipe (45). The bottoms of the two overflow pipes (43) are connected to the discharge main pipe (45).

10. The online particle size detection device for coal slurry water based on optical detection according to claim 9, characterized in that: The compression rod (84) has a relief groove (53) in the middle, and the straight rod (81) passes through the relief groove (53).

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