A particle size analyzer

Abstract

The utility model relates to the technical field of particle size analysis, especially to a particle size analyzer, aims at solving the problem that the existing particle size analyzer cannot keep samples. The particle size analyzer provided by the utility model includes stirring mechanism, sample inlet mechanism and sample holding cylinder, the stirring mechanism includes sampling pipeline, stirring subassembly, blanking subassembly and distributor, one end of sampling pipeline communicates with technological pipeline, and the other end is connected with stirring subassembly, blanking subassembly is set below stirring subassembly, distributor is set below blanking subassembly, material passes sampling pipeline, stirring subassembly, blanking subassembly in proper order from technological pipeline, and falls to distributor from blanking subassembly, the lower end of distributor is provided with first sampling port and second sampling port. The particle size analyzer provided by the utility model keeps manual sampling port, namely second sampling port, through setting classifier, and then realizes automatic analysis while being capable of keeping samples, provides support for data review.

Description

Technical Field

[0001] This utility model relates to the field of particle size analysis technology, and in particular to a particle size analyzer. Background Technology

[0002] The particle size distribution of cement directly affects its hydration activity, strength gain, and durability, serving as a crucial indicator in cement quality control. The cement industry relies heavily on two key indicators—the residue value on a 45μm square-hole sieve and the Blaine surface area—for quality control. With technological advancements, particle size analyzers have gradually replaced traditional manual measurement methods, significantly improving the standardization and accuracy of measurements. The development of automation technology has transformed particle size analyzers from manual operation and sampling to automated processes including sampling, sample return, measurement, data acquisition, and analysis. They can also process data in real time and provide rapid results, greatly enhancing analytical accuracy and work efficiency.

[0003] The online laser particle size analyzer developed by Optec Systems, a UK-based company, is a high-precision particle size monitoring system designed specifically for industrial environments. Utilizing laser diffraction technology and full Mie scattering theory, it conforms to the ISO 13320 international standard and can measure particle distribution in the range of 0.1–3000 μm in real time. The system achieves high efficiency through an intelligent, fully automated sampling process: first, a Venturi sampler automatically collects powder samples from the process pipeline; after being dispersed by a high-pressure airflow to form a uniform particle stream, the sample enters the laser measurement area, where a high-precision optical system scans and collects the scattered light signal in real time; an advanced Mie algorithm completes data processing and generates a complete particle size distribution report within seconds; after measurement, a pulse cleaning program is automatically initiated to ensure no residue remains on optical components and pipelines; finally, the measurement results are integrated with a PLC / DCS system via OPC communication, enabling 24-hour continuous monitoring and closed-loop control. However, fully automated particle size analyzers generally adopt a real-time automatic "sampling-returning" mode. In pursuit of miniaturization and ease of operation, they sacrifice the sample retention function and cannot perform a quality control closed loop of "detection-verification". This makes the experimental data untraceable and seriously affects the reliability and authority of the test results. Utility Model Content

[0004] The purpose of this invention is to provide a particle size analyzer to solve the problem that existing particle size analyzers cannot retain samples.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A particle size analyzer includes a stirring mechanism, a sample injection mechanism, and a sample retention cylinder;

[0007] The mixing mechanism includes a sampling pipe, a mixing assembly, a feeding assembly, and a distributor;

[0008] One end of the sampling pipe is connected to the process pipe, and the other end is connected to the stirring assembly;

[0009] The feeding assembly is located below the mixing assembly, and the distributor is located below the feeding assembly. The material passes through the sampling pipeline, the mixing assembly, and the feeding assembly in sequence from the process pipeline, and falls from the feeding assembly to the distributor.

[0010] The lower end of the distributor is provided with a first sampling port and a second sampling port; the material can enter the sampling mechanism through the first sampling port and the material can enter the sample retention cylinder through the second sampling port.

[0011] Furthermore, the distributor is provided with a first sampling channel and a second sampling channel;

[0012] One end of the first sampling channel is connected to the feeding component, and the other end is the first sampling port; one end of the second sampling channel is connected to the feeding component, and the other end is the second sampling port.

[0013] Furthermore, the feeder is provided with an elongated hole, which extends along the arrangement direction of the entrance of the first sampling channel and the entrance of the second sampling channel; the screw passes through the elongated hole and is inserted into the feeding assembly and threadedly connected to the feeding assembly.

[0014] Furthermore, the stirring assembly includes a sampling box and stirring blades;

[0015] The sampling box is connected to the sampling pipe; the stirring blade is rotatably mounted on the sampling box and configured to rotate around its own axis to stir the material entering the sampling box.

[0016] The feeding assembly includes a feeding box and a feeding roller. The feeding roller is rotatably mounted on the feeding box. The surface of the feeding roller has multiple feeding grooves arranged around its own axis. The lower end of the feeding box has a discharge port.

[0017] The feeding roller is configured to rotate about its own axis to deliver the material in the feeding trough to the discharge port and fall into the distributor.

[0018] Furthermore, the sample feeding mechanism includes a feeding component and a feeding assembly, with the feeding component disposed above the feeding assembly;

[0019] The feeding assembly includes a material tray, a storage bin, and a detection pipe, with the material tray positioned above the storage bin;

[0020] The material passes sequentially from the first sampling port through the feeding assembly, the material tray, the storage bin, and the detection pipe, and then enters the laser detection mechanism through the detection pipe.

[0021] Furthermore, the feeding assembly includes a sample inlet pipe, a feeding box, a feeding roller, a first return pipe, and an air blowing pipe;

[0022] The sampling pipe is connected to the feeding box, and the material enters the feeding box from the first sampling port through the sampling pipe; the surface of the feeding roller is provided with a plurality of feeding grooves arranged around its own axis; the feeding roller is rotatably mounted on the feeding box and configured to rotate around its own axis to feed the material in the feeding grooves out and fall into the material tray;

[0023] One end of the first return pipe is connected to the feeding box, and the other end is connected to the process pipe; one end of the air blowing pipe is connected to the feeding box.

[0024] The air blowing pipe is used to blow air into the feeding box to blow the material out of the feeding box and back to the process pipeline via the first return pipe.

[0025] Furthermore, the feeding assembly also includes a pneumatic vibrator, which is installed in the feeding box.

[0026] Furthermore, the feeding assembly also includes a second return pipe, a cleaning pipe, a mounting plate, and a linear vibrator;

[0027] One end of the second return pipe is connected to the material tray, and the other end is connected to the process pipe, used to suck up the material in the material tray; one end of the cleaning pipe is connected to the material tray, used to blow the material tray; the material tray, the storage bin, and the linear vibrator are all mounted on the mounting plate;

[0028] The linear vibrator is used to generate vibrations in the horizontal direction.

[0029] Furthermore, the feeding assembly also includes an auxiliary vibrating plate and a base plate;

[0030] One end of each of the two auxiliary vibrating plates is connected to the mounting plate, and the other end is connected to the base plate;

[0031] The mounting plate and the base plate are set horizontally.

[0032] Furthermore, the sample feeding mechanism also includes a mounting frame, on which the feeding assembly and the infeed assembly are respectively mounted.

[0033] Based on the above technical solutions, the technical effects achieved by this utility model are as follows:

[0034] The particle size analyzer provided by this utility model includes a stirring mechanism, a sample feeding mechanism, and a sample retention cylinder. The stirring mechanism includes a sampling pipe, a stirring assembly, a feeding assembly, and a distributor. One end of the sampling pipe is connected to the process pipeline, and the other end is connected to the stirring assembly. The feeding assembly is located below the stirring assembly, and the distributor is located below the feeding assembly. The material passes through the sampling pipe, the stirring assembly, and the feeding assembly sequentially from the process pipeline, and falls from the feeding assembly to the distributor. The lower end of the distributor is provided with a first sampling port and a second sampling port. The material can enter the sample feeding mechanism through the first sampling port, and the material can enter the sample retention cylinder through the second sampling port.

[0035] The particle size analyzer provided by this utility model has a reserved manual sampling port, i.e., a second sampling port, in the classifier, thereby enabling automatic analysis while retaining samples, which provides support for data verification. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the stirring mechanism;

[0038] Figure 2 This is a cross-sectional view of the distributor;

[0039] Figure 3 This is a schematic diagram of the material distributor.

[0040] Figure 4 This is a schematic diagram of the feeding roller structure;

[0041] Figure 5 This is a schematic diagram of the material feeding box.

[0042] Figure 6 This is a schematic diagram of the sample introduction mechanism;

[0043] Figure 7 This is the front view of the sample introduction mechanism.

[0044] Icons: 110, Sampling pipe; 140, Distributor; 121, Sampling box; 122, Agitator motor; 131, Feeding box; 132, Feeding roller; 133, Feeding motor; 141, First sampling port; 142, Second sampling port; 143, First sampling channel; 144, Second sampling channel; 145, Elongated hole; 101, Feeding trough;

[0045] 210. Feeding assembly; 220. Feeding component; 230. Mounting bracket; 240. Shock-absorbing pad; 211. Sample inlet pipe; 212. Feeding box; 213. First sample return pipe; 214. Air blowing pipe; 215. Pneumatic vibrator; 216. Feeding motor; 217. Connecting plate; 221. Material tray; 222. Storage bin; 223. Detection pipe; 224. Second sample return pipe; 225. Cleaning pipe; 226. Mounting plate; 227. Linear vibrator; 228. Auxiliary vibrating plate; 229. Base plate. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] Fully automated particle size analyzers generally adopt a real-time automatic "sampling-returning" mode. In pursuit of miniaturization and ease of operation, the sample retention function is sacrificed, making it impossible to perform a closed-loop quality control of "detection-verification". This results in the loss of traceability of experimental data and seriously affects the reliability and authority of the test results.

[0050] In view of this, the present invention provides a particle size analyzer, including a stirring mechanism, a sample feeding mechanism, and a sample retention cylinder; the stirring mechanism includes a sampling pipe 110, a stirring assembly, a feeding assembly, and a distributor 140; one end of the sampling pipe 110 is connected to a process pipeline, and the other end is connected to the stirring assembly; the feeding assembly is located below the stirring assembly, and the distributor 140 is located below the feeding assembly; the material passes through the sampling pipe 110, the stirring assembly, and the feeding assembly sequentially from the process pipeline, and falls from the feeding assembly to the distributor 140; the lower end of the distributor 140 is provided with a first sampling port 141 and a second sampling port 142; the material can enter the sample feeding mechanism through the first sampling port 141, and the material can enter the sample retention cylinder through the second sampling port 142.

[0051] The particle size analyzer provided by this utility model can achieve automatic analysis and sample retention at the same time by setting a reserved manual sampling port in the classifier, namely the second sampling port 142, thus providing support for data verification.

[0052] The following combination Figures 1-7 The structure and shape of the particle size analyzer provided in this embodiment are described in detail below:

[0053] A sampling mechanism is provided between the sampling pipe 110 and the process pipe to extract the material in the process pipe and send it into the sampling pipe. The sampling mechanism is an existing structure and will not be described in detail here. Please refer to the patent with publication number CN204374036U.

[0054] In this embodiment, the feeder 140 is provided with a first sampling channel 143 and a second sampling channel 144; one end of the first sampling channel 143 is connected to the feeding component, and the other end is the first sampling port 141; one end of the second sampling channel 144 is connected to the feeding component, and the other end is the second sampling port 142.

[0055] Furthermore, the distributor 140 is provided with an elongated hole 145, such as... Figure 3 As shown, the elongated hole 145 extends along the arrangement direction of the inlet of the first sampling channel 143 and the inlet of the second sampling channel 144; the screw passes through the elongated hole 145 and is inserted into the feeding assembly and threadedly connected to the feeding assembly. The position of the distributor 140 in the horizontal direction can be adjusted through the elongated hole 145, thereby changing the ratio of material entering the first sampling channel 143 and the second sampling channel 144, so that the material flow rate meets the requirements.

[0056] In this embodiment, the stirring assembly includes a sampling box 121 and a stirring blade; the upper end of the sampling box 121 is connected to the sampling pipe 110; the stirring blade is rotatably mounted on the sampling box 121 and configured to rotate around its own axis to stir the material entering the sampling box 121. The stirring assembly also includes a stirring motor 122, which drives the stirring blade to rotate, thereby fully homogenizing the material sampled multiple times to form a representative composite sample.

[0057] In this embodiment, the feeding assembly includes a feeding box 131 and a feeding roller 132. The feeding roller 132 is rotatably mounted on the feeding box 131. The surface of the feeding roller 132 has multiple feeding grooves 101 arranged around its own axis, such as... Figure 4 As shown, the lower end of the feeding box 131 has a discharge port; the feeding roller 132 is configured to rotate around its own axis to deliver the material in the feeding trough 101 to the discharge port and fall into the distributor 140. The feeding assembly also includes a feeding motor 133, which drives the feeding roller 132 to rotate.

[0058] When the mixing mechanism is working, it takes multiple samples from the process pipeline to allow the material to enter the sampling box 121 through the sampling pipeline 110. Then, the mixing assembly is started to homogenize the material to complete the preparation. The material in the sampling box 121 enters the feeding box 131 under the action of gravity. Then, the feeding motor 133 drives the feeding roller 132 to rotate. As the feeding roller 132 rotates, the feeding trough 101 located above rotates to the discharge port, and the material collected therein falls into the distributor 140.

[0059] In this embodiment, the sample feeding mechanism includes a feeding assembly 210 and a feeding assembly 220, such as... Figure 6 , Figure 7 As shown, the feeding component 210 is positioned above the feeding component 220; the feeding component 220 includes a material tray 221, a storage bin 222, and a detection pipe 223, with the material tray 221 positioned above the storage bin 222; the material passes sequentially through the feeding component 210, the material tray 221, the storage bin 222, and the detection pipe 223 from the first sampling port 141, and enters the laser detection mechanism through the detection pipe 223.

[0060] In this embodiment, the feeding assembly 210 includes a sample inlet pipe 211, a feeding box 212, a feeding roller, a first return sample pipe 213, and an air blowing pipe 214. The sample inlet pipe 211 is connected to the feeding box 212, and the material enters the feeding box 212 through the sample inlet pipe 211 from the first sampling port 141 under the action of gravity. The surface of the feeding roller is provided with a plurality of feeding grooves arranged around its own axis. The feeding roller is rotatably mounted on the feeding box 212 and configured to rotate around its own axis to feed the material in the feeding grooves out and fall into the material tray 221.

[0061] One end of the first return sampling pipe 213 is connected to the feeding box 212, and the other end is connected to the process pipeline. One end of the air blowing pipe 214 is connected to the feeding box 212. The air blowing pipe 214 is used to blow air into the feeding box 212 to blow the material out of the feeding box 212 and back to the process pipeline via the first return sampling pipe 213. Specifically, the first return sampling pipe 213 is connected to a fan. Under the action of the fan, the first return sampling pipe 213 generates negative pressure, thereby extracting the material from the feeding box 212. The air blowing pipe 214 is used to replenish air into the feeding box 212.

[0062] In this embodiment, the feeding assembly 210 also includes a feeding motor 216, which is used to drive the feeding roller to rotate. The feeding roller has the same structure as the unloading roller 132.

[0063] In this embodiment, the feeding assembly 210 further includes a pneumatic vibrator 215, which is installed in the feeding box 212 and is used to generate vibration to ensure that the material does not stick or block inside the pipe and the feeding box 212.

[0064] In this embodiment, the feeding assembly 220 further includes a second return pipe 224, a cleaning pipe 225, a mounting plate 226, and a linear vibrator 227. One end of the second return pipe 224 is connected to the material tray 221, and the other end is connected to the process pipeline, used to suck up the material in the material tray 221. One end of the cleaning pipe 225 is connected to the material tray 221 and used to blow air into the material tray 221. Similarly, the second return pipe 224 is connected to a fan, which is used to suck up any remaining material in the material tray 221; the cleaning pipe 225 blows air into the material tray 221 for further cleaning to prevent material residue. The material tray 221, the storage bin 222, and the linear vibrator 227 are all mounted on the mounting plate 226. The linear vibrator 227 is used to generate horizontal vibration to prevent material adhesion and drive the material from the material tray 221 into the storage bin 222.

[0065] Specifically, the top opening of the tray 221 is used to receive the material output from the feeding assembly 210, and the bottom wall of the tray 221 is inclined so that the material flows out of the tray 221 and falls into the storage bin 222 under the action of gravity and vibration. Furthermore, the side wall opening of the tray 221 serves as the material outlet.

[0066] In this embodiment, the feeding assembly 220 also includes auxiliary vibrating plates 228 and a base plate 229; one end of the two auxiliary vibrating plates 228 is connected to the mounting plate 226, and the other end is connected to the base plate 229; the mounting plate 226 and the base plate 229 are horizontally arranged, so that the two auxiliary vibrating plates 228, the mounting plate 226 and the base plate 229 form a parallelogram structure, which is beneficial for the mounting plate 226 to vibrate in the horizontal direction under the action of the linear vibrator 227, that is, to amplify the vibration effect of the linear vibrator 227, so that the material on the material tray 221 is quickly dispersed and falls into the storage bin 222, and then a uniform particle flow is formed by pneumatic dispersion. The material enters the laser detection mechanism through the detection pipe 223 to complete automatic detection.

[0067] In this embodiment, the sample injection mechanism further includes a mounting frame 230, on which the feeding assembly 210 and the feeding assembly 220 are respectively mounted. Specifically, the connecting plate 217 and the base plate 229 are respectively connected to the mounting frame 230, which can be done by bolts. Furthermore, to mitigate the impact of vibration on equipment stability, the sample injection mechanism also includes a shock-absorbing pad 240. A shock-absorbing pad 240 is provided between the connecting plate 217 and the mounting frame 230, and between the base plate 229 and the mounting frame 230. The shock-absorbing pad 240 can be made of rubber, and to improve the shock absorption effect, the shock-absorbing pad 240 has through holes extending horizontally to form a hollow structure.

[0068] After the measurement is completed, the equipment immediately performs a cleaning operation to clean the feed box 212 and the material tray 221 to ensure that there is no material residue inside the equipment, so as to facilitate the next test.

[0069] When manually adding samples offline, the fully homogenized material sample can be manually added to the material tray 221 at an appropriate weight to replace the automatic operation of the feeding component 210.

[0070] The lack of offline sampling and testing functionality means that when there are significant discrepancies between the equipment test results and laboratory test data for multiple cement varieties, it is impossible to simultaneously debug and calibrate all cement varieties due to cement production plan limitations. The lack of material homogenization functionality means that a single sample may not reflect the overall quality and performance of the batch of material. The particle size analyzer provided in this embodiment combines a stirring assembly, a distributor 140, and a sampling mechanism to improve the detection accuracy and reliability of the laser particle size analyzer. The stirring assembly homogenizes samples from multiple samplings, while the dispensing assembly controls the dispensing of the homogenized material. The distributor 140 has two sampling ports, further optimizing the sampling process. The feeding assembly 210 precisely controls the amount of material falling into the material tray 221 by adjusting the rotation speed of the feeding rollers. The material source for the material tray 221 can be either automatically conveyed by the feeding motor 216 or manually added.

[0071] Employing a dual-mode configuration of "online + offline," it enables real-time continuous monitoring while allowing for immediate switching to manual sampling and verification, ensuring the timeliness and high reliability of the data. Furthermore, thorough sample mixing effectively reduces errors caused by uneven material flow or particle segregation, resulting in test results that more closely approximate the true particle size distribution.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A particle size analyzer, characterized in that, Includes a stirring mechanism, a sample injection mechanism, and a sample retention tube; The stirring mechanism includes a sampling pipe (110), a stirring assembly, a feeding assembly, and a distributor (140). One end of the sampling pipe (110) is connected to the process pipe, and the other end is connected to the stirring assembly; The feeding assembly is located below the mixing assembly, and the distributor (140) is located below the feeding assembly. The material passes through the sampling pipeline (110), the mixing assembly, and the feeding assembly in sequence from the process pipeline, and falls from the feeding assembly to the distributor (140). The lower end of the distributor (140) is provided with a first sampling port (141) and a second sampling port (142); the material can enter the sampling mechanism through the first sampling port (141) and the material can enter the sample retention cylinder through the second sampling port (142).

2. The particle size analyzer according to claim 1, characterized in that, The distributor (140) is provided with a first sampling channel (143) and a second sampling channel (144). The first sampling channel (143) is connected to the feeding component at one end and to the first sampling port (141) at the other end; the second sampling channel (144) is connected to the feeding component at one end and to the second sampling port (142) at the other end.

3. The particle size analyzer according to claim 2, characterized in that, The feeder (140) is provided with an elongated hole (145), which extends along the arrangement direction of the entrance of the first sampling channel (143) and the entrance of the second sampling channel (144); the screw passes through the elongated hole (145) and is inserted into the feeding assembly and threadedly connected to the feeding assembly.

4. The particle size analyzer according to claim 1, characterized in that, The stirring assembly includes a sampling box (121) and stirring blades; The sampling box (121) is connected to the sampling pipe (110); the stirring blade is rotatably installed in the sampling box (121) and configured to rotate around its own axis to stir the material entering the sampling box (121); The feeding assembly includes a feeding box (131) and a feeding roller (132). The feeding roller (132) is rotatably mounted on the feeding box (131). The surface of the feeding roller (132) is provided with a plurality of feeding grooves (101) arranged around its own axis. The lower end of the feeding box (131) is provided with a discharge port. The feed roller (132) is configured to rotate about its own axis to deliver the material in the feed trough (101) to the discharge port and fall into the distributor (140).

5. The particle size analyzer according to claim 1, characterized in that, The sample feeding mechanism includes a feeding assembly (210) and a feeding assembly (220), wherein the feeding assembly (210) is disposed above the feeding assembly (220); The feeding assembly (220) includes a material tray (221), a storage bin (222), and a detection pipe (223), wherein the material tray (221) is disposed above the storage bin (222); The material passes through the feeding assembly (210), the material tray (221), the storage bin (222) and the detection pipe (223) sequentially from the first sampling port (141), and then enters the laser detection mechanism through the detection pipe (223).

6. The particle size analyzer according to claim 5, characterized in that, The feeding assembly (210) includes a sample inlet pipe (211), a feeding box (212), a feeding roller, a first return pipe (213), and an air blowing pipe (214). The inlet pipe (211) is connected to the feeding box (212), and the material enters the feeding box (212) through the inlet pipe (211) from the first sampling port (141); the surface of the feeding roller is provided with a plurality of feeding grooves arranged around its own axis; the feeding roller is rotatably mounted on the feeding box (212) and configured to rotate around its own axis to feed the material in the feeding grooves out and fall into the material tray (221). One end of the first return pipe (213) is connected to the feeding box (212), and the other end is connected to the process pipe. One end of the air blowing pipe (214) is connected to the feeding box (212). The air blowing pipe (214) is used to blow air into the feed box (212) to blow the material out of the feed box (212) and back to the process pipeline via the first return pipe (213).

7. The particle size analyzer according to claim 6, characterized in that, The feeding assembly (210) also includes a pneumatic vibrator (215), which is mounted on the feeding box (212).

8. The particle size analyzer according to claim 5, characterized in that, The feeding assembly (220) also includes a second return pipe (224), a cleaning pipe (225), a mounting plate (226), and a linear vibrator (227). The second return pipe (224) is connected at one end to the material tray (221) and at the other end to the process pipe, and is used to suck up the material in the material tray (221); the cleaning pipe (225) is connected at one end to the material tray (221) and is used to spray the material tray (221); the material tray (221), the storage bin (222), and the linear vibrator (227) are all installed on the mounting plate (226). The linear vibrator (227) is used to generate vibration in the horizontal direction.

9. The particle size analyzer according to claim 8, characterized in that, The feeding assembly (220) also includes an auxiliary vibrating plate (228) and a base plate (229). One end of each of the two auxiliary vibrating plates (228) is connected to the mounting plate (226), and the other end is connected to the base plate (229); The mounting plate (226) and the base plate (229) are horizontally arranged.

10. The particle size analyzer according to claim 5, characterized in that, The sample feeding mechanism also includes a mounting frame (230), on which the feeding assembly (210) and the feeding assembly (220) are respectively mounted.

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