Sample introduction mechanism of laser particle analyzer

Abstract

The utility model discloses a laser particle analyzer sample introduction mechanism, which comprises a sample introduction hopper, a feed inlet, a dispersion bin and a nozzle, the feed inlet is arranged at one end of the top of the sample introduction hopper, the dispersion bin is arranged at the bottom end of the sample introduction hopper, and second rotating shafts are arranged on two sides in the dispersion bin through supports. A blowing pipe is arranged on the second rotating shaft, nozzles are uniformly distributed on one side of the blowing pipe, a driving box is arranged on one side of each support, a second driving motor is arranged in each driving box, a driving gear is arranged at the output end of each second driving motor, one end of each second rotating shaft extends into the corresponding driving box, and the other end of each second rotating shaft extends into the corresponding driving box. And a driven gear engaged with the driving gear is arranged at one end of the second rotating shaft. The sample feeding hopper, the dispersion bin, the bracket, the second rotating shaft, the blowing pipe, the nozzle and the driving box are arranged, so that auxiliary airflow in different directions can be provided according to different samples, and the dispersion effect of the samples is optimized in a targeted manner.

Description

Technical Field

[0001] This utility model relates to the field of sample introduction mechanism technology, specifically a sample introduction mechanism for a laser particle size analyzer. Background Technology

[0002] A laser particle size analyzer is a precision instrument that uses the principle of laser scattering or diffraction to quickly measure the size distribution of particles. It is widely used in materials science, chemical engineering, medicine, food, geology and other fields. The sample feeding mechanism of the laser particle size analyzer is an important component. Its main function is to uniformly and stably transport the sample to the measurement area to ensure the accuracy and reliability of the measurement results.

[0003] Depending on the specifications of the laser particle size analyzer, there are different types of sample feeding mechanisms. Taking the funnel-type sample feeding mechanism as an example, this type of sample feeding mechanism mainly introduces dry powder samples. The dry powder samples are stored in the sample feeding mechanism and fall under the action of gravity. They are then transported to the measurement area of ​​the laser particle size analyzer through the pipes or channels. In order to improve the feeding efficiency, compressed air is usually introduced from the side to form a high-speed airflow, which blows the sample to the laser measurement area. However, the nozzle angle is generally fixed, while different samples require airflow from different directions to assist in dispersion. A fixed-angle airflow cannot specifically optimize the dispersion effect, resulting in some samples not being completely dispersed, which affects the accuracy of the measurement. Utility Model Content

[0004] The purpose of this invention is to provide a laser particle size analyzer sample feeding mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a laser particle size analyzer sample feeding mechanism, comprising a sample feeding hopper, a feed inlet, a dispersion chamber, and nozzles. The feed inlet is located at one end of the top of the sample feeding hopper, and the dispersion chamber is located at the bottom of the sample feeding hopper. The top of the dispersion chamber is connected to the sample feeding hopper via a connecting pipe, and the bottom of the dispersion chamber is located at a discharge outlet. Second rotating shafts are mounted on both sides of the dispersion chamber via supports, and blowing pipes are mounted on the second rotating shafts. Nozzles are evenly distributed on one side of each blowing pipe. A drive box is mounted on one side of each support, and a second drive motor is mounted inside each drive box. A drive gear is mounted at the output end of each second drive motor. One end of each second rotating shaft extends into the drive box, and a driven gear meshing with the drive gear is mounted at one end of each second rotating shaft.

[0006] Preferably, a first rotating shaft is provided at the center of the inside of the sample inlet, and spiral blades are evenly distributed at the center of the first rotating shaft.

[0007] Preferably, a first drive motor is fixed to the top of the sample feeding hopper, and the output end of the first drive motor is connected to the first rotating shaft.

[0008] Preferably, scrapers are evenly provided on both sides of the first rotating shaft via connecting rods, and the scrapers are all in contact with the inner wall of the sample feeding hopper.

[0009] Preferably, a third rotating shaft is provided at the bottom of the sample inlet, and partitions are evenly distributed on the outer side of the third rotating shaft.

[0010] Preferably, there are 6 sets of partitions, and each of the sample inlets between the partitions forms a receiving cavity.

[0011] Preferably, a third drive motor is fixed to the bottom end of one side of the sample feeding hopper, and the output end of the third drive motor is connected to the third rotating shaft.

[0012] Preferably, air pumps are provided at both ends of the top of the dispersion chamber, and the air pumps are connected to the blowing pipe and the air compressor respectively through air guide pipes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The laser particle size analyzer sample feeding mechanism is equipped with a sample feeding hopper, a dispersion chamber, a support, a second rotating shaft, a blower pipe, a nozzle, a drive box, a drive gear, a driven gear, and a second drive motor. The powder sample is stored in the sample feeding hopper. The bottom of the dispersion chamber is connected to the measurement channel of the laser particle size analyzer through the discharge port. After the powder sample enters the dispersion chamber, the obliquely set blower head forms a cross airflow, which enhances the particle collision and dispersion effect. The material is driven through the discharge port into the measurement area of ​​the laser particle size analyzer. The second drive motor can drive the drive gear to rotate, which in turn drives the driven gear and the second rotating shaft to rotate, thereby adjusting the angle of the blower pipe and the nozzle. Different directions of auxiliary airflow can be provided according to different samples, which can be used to optimize the dispersion effect of the sample and improve the accuracy of subsequent measurements. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a frontal cross-sectional view of the present invention.

[0016] Figure 2 This is a top view sectional structural diagram of the bracket of this utility model;

[0017] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a side view sectional view of the partition structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the first rotating shaft structure of this utility model.

[0020] In the diagram: 1. Feed hopper; 2. Feed inlet; 3. First rotating shaft; 4. First drive motor; 5. Receiving cavity; 6. Baffle plate; 7. Dispersion chamber; 8. Support; 9. Blowing pipe; 10. Air guide pipe; 11. Air pump; 12. Discharge port; 13. Nozzle; 14. Second rotating shaft; 15. Drive box; 16. Second drive motor; 17. Drive gear; 18. Driven gear; 19. Third drive motor; 20. Third rotating shaft; 21. Scraper; 22. Spiral blade. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5 An embodiment of this utility model is provided: a laser particle size analyzer feeding mechanism, including a feeding hopper 1, a feed inlet 2, a dispersion chamber 7 and a nozzle 13. The feed inlet 2 is provided at one end of the top of the feeding hopper 1, and a first rotating shaft 3 is provided at the center of the inside of the feeding hopper 1, and spiral blades 22 are evenly distributed at the center of the first rotating shaft 3.

[0023] The top of the sample feeding hopper 1 is fixed with a first drive motor 4, and the output end of the first drive motor 4 is connected to the first rotating shaft 3;

[0024] Scrapers 21 are evenly provided on both sides of the first rotating shaft 3 via connecting rods, and the scrapers 21 are all in contact with the inner wall of the sample feeding hopper 1.

[0025] The powder sample is poured into the sample hopper 1 through the feed inlet 2. The first drive motor 4 drives the first rotating shaft 3 to rotate. The spiral blade 22 continuously stirs the sample upward to prevent the sample from sticking. At the same time, the scraper 21 rotates against the inner wall of the sample hopper 1 to prevent the sample from sticking and remaining.

[0026] A third rotating shaft 20 is provided at the bottom of the sample inlet 1, and partitions 6 are evenly distributed on the outer side of the third rotating shaft 20; there are 6 sets of partitions 6, and each of the sample inlets 1 between the partitions 6 forms a receiving cavity 5.

[0027] The bottom of the sample inlet 1 is provided with a dispersion chamber 7, and the top of the dispersion chamber 7 is connected to the sample inlet 1 through a connecting pipe.

[0028] After the sample is introduced, it falls into the receiving cavity 5, which is divided by partition 6. There are a total of 6 partitions, forming multiple independent storage spaces.

[0029] A third drive motor 19 is fixed at the bottom of one side of the sample inlet 1, and the output end of the third drive motor 19 is connected to the third rotating shaft 20.

[0030] When the sample is introduced for measurement, the third drive motor 19 drives the third rotating shaft 20 to rotate, and the partition 6 rotates accordingly, pushing the sample in the receiving cavity 5 to the bottom outlet of the sample feeding hopper 1 one by one, so as to realize quantitative and intermittent feeding.

[0031] The two sides inside the dispersion chamber 7 are equipped with second rotating shafts 14 via brackets 8, and the second rotating shafts 14 are equipped with blowing pipes 9, with nozzles 13 evenly distributed on one side of the blowing pipes 9.

[0032] Air pumps 11 are installed at both ends of the top of the dispersion chamber 7, and the air pumps 11 are connected to the blowing pipe 9 and the air compressor respectively through the air guide pipe 10.

[0033] The bottom end of the dispersion chamber 7 is provided with a discharge port 12, which is connected to the measurement channel of the laser particle size analyzer. The bottom outlet of the sample feed hopper 1 is connected to the top of the dispersion chamber 7 through a connecting pipe.

[0034] After quantification, the sample falls into the dispersion chamber 7 through the connecting tube. At the same time, the air pump 11 delivers compressed air to the blowing pipe 9 through the air guide pipe 10. The airflow is ejected at high speed from the nozzle 13, forming a cross airflow in the dispersion chamber 7. The shearing force and impact force generated by the high-speed airflow break up the sample agglomerates and drive the material to move towards the discharge port 12 at the bottom of the dispersion chamber 7.

[0035] A drive box 15 is provided on one side of the bracket 8, and a second drive motor 16 is provided inside the drive box 15. A drive gear 17 is provided at the output end of the second drive motor 16. One end of the second rotating shaft 14 extends into the drive box 15, and a driven gear 18 that meshes with the drive gear 17 is provided at one end of the second rotating shaft 14.

[0036] By starting the second drive motor 16, the drive gear 17 is driven to rotate, and the driven gear 18 is engaged to make the second rotating shaft 14 rotate, thereby adjusting the tilt angle of the blowing pipe 9 and the nozzle 13. The airflow direction can be dynamically changed according to the characteristics of the sample. For example, upward oblique blowing is used for viscous materials, and horizontal or downward oblique blowing is used for large particles.

[0037] Finally, the single particles or small agglomerates, after being fully dispersed by the airflow, enter the measurement channel of the laser particle size analyzer through the discharge port 12.

[0038] The specific models and specifications of the first drive motor 4, the second drive motor 16, the third drive motor 19, and the air pump 11 need to be determined based on the specifications and parameters of the device. The selection and calculation method is existing technology, so it will not be described in detail here.

[0039] Working Principle: In this embodiment, the powder sample is poured into the sample hopper 1 through the feed inlet 2. The sample falls into the receiving cavity 5, which is divided by partitions 6. There are 6 sets of partitions, forming multiple independent storage spaces. The first drive motor 4 drives the first rotating shaft 3 to rotate, and the spiral blades 22 continuously stir the sample upward to prevent it from sticking. At the same time, the scraper 21 rotates against the inner wall of the sample hopper 1 to prevent the sample from sticking and remaining. Then, the third drive motor 19 drives the third rotating shaft 20 to rotate, and the partitions 6 rotate accordingly, pushing the samples in the receiving cavities 5 one by one to the bottom outlet of the sample hopper 1, realizing quantitative and intermittent feeding. The bottom outlet of the sample hopper 1 is connected to the top of the dispersion chamber 7 through a connecting pipe. The quantitatively fed sample falls into the dispersion chamber 7 through the connecting pipe. Meanwhile, the air pump 11 delivers compressed air to the blowing pipe 9 through the air guide pipe 10. The airflow is ejected at high speed from the nozzle 13, forming a cross airflow in the dispersion chamber 7. The shearing and impact forces generated by the high-speed airflow break up the sample agglomerates and move the material towards the discharge port 12 at the bottom of the dispersion chamber 7. By starting the second drive motor 16, the drive gear 17 is rotated, meshing with the driven gear 18 to rotate the second rotating shaft 14, thereby adjusting the tilt angle of the blowing pipe 9 and the nozzle 13. The airflow direction can be dynamically changed according to the characteristics of the sample. For example, upward oblique blowing is used for viscous materials, and horizontal or downward oblique blowing is used for large particles. After being fully dispersed by the airflow, the single particles or small agglomerates enter the measurement channel of the laser particle size analyzer through the discharge port 12.

[0040] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sample feeding mechanism for a laser particle size analyzer, characterized in that, The system includes a sample inlet (1), a feed port (2), a dispersion chamber (7), and a nozzle (13). The sample inlet (2) is located at one end of the top of the sample inlet (1), and the dispersion chamber (7) is located at the bottom of the sample inlet (1). The top of the dispersion chamber (7) is connected to the sample inlet (1) via a connecting pipe, and the bottom of the dispersion chamber (7) has a discharge port (12). Second rotating shafts (14) are mounted on both sides of the dispersion chamber (7) via brackets (8), and the second rotating shafts (14) are equipped with… The blowing pipe (9) has nozzles (13) evenly distributed on one side. The support (8) has a drive box (15) on one side. The drive box (15) has a second drive motor (16) inside. The output end of the second drive motor (16) has a drive gear (17). One end of the second shaft (14) extends into the drive box (15). One end of the second shaft (14) has a driven gear (18) meshing with the drive gear (17).

2. The laser particle size analyzer sample feeding mechanism according to claim 1, characterized in that: A first rotating shaft (3) is provided at the center of the sample inlet (1), and spiral blades (22) are evenly distributed at the center of the first rotating shaft (3).

3. The laser particle size analyzer sample feeding mechanism according to claim 2, characterized in that: The top of the feed hopper (1) is fixed with a first drive motor (4), and the output end of the first drive motor (4) is connected to the first rotating shaft (3).

4. The laser particle size analyzer sample feeding mechanism according to claim 2, characterized in that: Scrapers (21) are evenly provided on both sides of the first rotating shaft (3) via connecting rods, and the scrapers (21) are all in contact with the inner wall of the sample feeding hopper (1).

5. The laser particle size analyzer sample feeding mechanism according to claim 1, characterized in that: The bottom end of the feed hopper (1) is provided with a third rotating shaft (20), and partitions (6) are evenly distributed on the outer side of the third rotating shaft (20).

6. The laser particle size analyzer sample feeding mechanism according to claim 5, characterized in that: The partition (6) is provided in 6 sets, and each sample inlet (1) between the partitions (6) forms a receiving cavity (5).

7. The laser particle size analyzer sample feeding mechanism according to claim 5, characterized in that: A third drive motor (19) is fixed at the bottom of one side of the sample inlet (1), and the output end of the third drive motor (19) is connected to the third rotating shaft (20).

8. The laser particle size analyzer sample feeding mechanism according to claim 1, characterized in that: Air pumps (11) are installed at both ends of the top of the dispersion chamber (7), and the air pumps (11) are connected to the blowing pipe (9) and the air compressor through the air guide pipe (10).

Images