Sample introduction device of on-line laser particle analyzer

Abstract

The utility model discloses a sample introduction device of an on-line laser particle size analyzer, which belongs to the technical field of laser particle size analyzers and comprises a conveying mechanism, the conveying mechanism comprises a first mixing cavity, a first feeding cavity, a first air inlet cavity and a first discharging cavity, compressed air enters the first mixing cavity through the first air inlet cavity, and the first mixing cavity is communicated with the first feeding cavity through the first discharging cavity. The sample is output through the first discharging cavity; the dispersing mechanism comprises a second mixing cavity, a second feeding cavity, a second air inlet cavity and a second discharging cavity, compressed air enters the second mixing cavity through the second air inlet cavity, and a sample is output into the dry-method laser scattering measurement mechanism through the second discharging cavity; the first air inlet cavity, the first mixing cavity and the first discharging cavity are coaxially arranged, and the second air inlet cavity, the second mixing cavity and the second discharging cavity are coaxially arranged. The device can shorten the tube distance of particle dispersion and avoid re-adhesion of dispersed samples, so that the measurement quality and efficiency are improved, and the accuracy of measurement data is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of laser particle size analyzers, in particular to a sample feeding device of an online laser particle size analyzer. Background Art

[0002] The online laser particle size analyzer is an instrument that uses optical principles to analyze the particle size of particles in a sample. By using the laser scattering effect to analyze the particles, the particle size distribution of the sample can be finally obtained. It is widely used in various industrial online detection fields such as cement, slag, stone powder, and coal powder.

[0003] The online laser particle size analyzer system consists of a sampling device, a reduction device, a dry laser scattering measurement device, a sample return device, and a display and control assembly. The position of the traditional sampling device is determined according to the sampling point at the industrial site, which results in a long distance between the laser measurement devices in the sampling device and requires the use of a long connecting tube. The longer the connecting tube, the easier it is for the dispersed sample to stick together again, affecting the measurement result. At the same time, because the connecting tube is long, a higher air pressure is required to transfer the sample to the measurement window. The sample under high pressure is easy to break, resulting in a large deviation in the measurement result. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a sample introduction device for an online laser particle size analyzer, which can prevent sample particles from sticking together, improve test efficiency, and thus ensure data accuracy.

[0005] According to the sample introduction device of the online laser particle size analyzer of the embodiment of the utility model, the transmission mechanism includes a first mixing chamber, a first feeding chamber, a first air inlet chamber and a first discharge chamber, the output end of the first feeding chamber is connected to the first mixing chamber, the output end of the first air inlet chamber is connected to the first mixing chamber, the input end of the first discharge chamber is connected to the output end of the first mixing chamber, the sample enters the first mixing chamber through the first feeding chamber, the compressed air enters the first mixing chamber through the first air inlet chamber, and the sample is output through the first discharge chamber; the dispersion mechanism includes a second mixing chamber, a second feeding chamber, a second air inlet chamber and a first discharge chamber. Two discharge chambers, the input end of the second feed chamber is connected to the output end of the first discharge chamber, the output end of the second feed chamber is connected to the second mixing chamber, the output end of the second air inlet chamber is connected to the second mixing chamber, the input end of the second discharge chamber is connected to the output end of the second mixing chamber, the output end of the second discharge chamber is connected to the input end of the dry laser scattering measurement mechanism, compressed air enters the second mixing chamber through the second air inlet chamber, and outputs the sample to the dry laser scattering measurement mechanism through the second discharge chamber; the first air inlet chamber, the first mixing chamber and the first discharge chamber are coaxially arranged, and the second air inlet chamber, the second mixing chamber and the second discharge chamber are coaxially arranged.

[0006] The sample introduction device of the online laser particle size analyzer according to the embodiment of the utility model has at least the following beneficial effects: a transmission mechanism, a dispersion mechanism and a dry laser scattering measurement mechanism are sequentially arranged and connected, connecting tubes of different lengths are selected between the transmission mechanism and the dispersion mechanism as needed, and the dispersion mechanism is arranged near the dry laser scattering measurement mechanism to shorten the tube distance passed during the particle dispersion process, avoid re-adhesion of the dispersed sample, improve the practicability of the device, thereby improving the quality and efficiency of the measurement and ensuring the accuracy of the measurement data.

[0007] According to some embodiments of the present utility model, the output end of the second discharge cavity is connected to the input end of the dry laser scattering measurement mechanism through an antistatic tube.

[0008] According to some embodiments of the utility model, the first feed chamber includes: a first bucket chamber; a first guide chamber, the first guide chamber is coaxially arranged with the first bucket chamber, the input end of the first guide chamber is connected with the output end of the first bucket chamber, the output end of the first guide chamber is connected with the first mixing chamber, the first guide chamber is in a vertically arranged cylindrical shape, and the axial height of the first bucket chamber is greater than the axial height of the first guide chamber.

[0009] According to some embodiments of the utility model, the first air inlet chamber includes: a first air channel, which is a horizontally arranged cylindrical shape; a first air nozzle, which is coaxially arranged with the first air channel, the input end of the first air nozzle is connected with the output end of the first air channel, the output end of the first air nozzle is connected with the first mixing chamber, and the axial cross-sectional area of ​​the first air nozzle gradually decreases in the direction away from the first air channel.

[0010] According to some embodiments of the utility model, the first discharge chamber includes: a first contraction chamber, the input end of the first contraction chamber is connected to the output end of the first mixing chamber, and the axial cross-sectional area of ​​the first contraction chamber gradually decreases in the direction away from the first mixing chamber; a first expansion chamber, the input end of the first expansion chamber is connected to the output end of the first contraction chamber, and the axial cross-sectional area of ​​the first expansion chamber gradually increases in the direction away from the first contraction chamber.

[0011] According to some embodiments of the utility model, the second feed chamber includes: a second bucket chamber; a second guide chamber, the second guide chamber is coaxially arranged with the second bucket chamber, the input end of the second guide chamber is connected with the output end of the second bucket chamber, the output end of the second guide chamber is connected with the second mixing chamber, the second guide chamber is in a vertically arranged cylindrical shape, and the axial height of the second bucket chamber is smaller than the axial height of the second guide chamber.

[0012] According to some embodiments of the utility model, the second air inlet chamber includes: a second air channel, which is a horizontally arranged cylindrical shape; a second air nozzle, which is coaxially arranged with the second air channel, the input end of the second air nozzle is connected with the output end of the second air channel, the output end of the second air nozzle is connected with the second mixing chamber, and the axial cross-sectional area of ​​the second air nozzle gradually decreases in the direction away from the second air channel.

[0013] According to some embodiments of the utility model, the second discharge chamber includes: a second contraction chamber, the input end of the second contraction chamber is connected with the output end of the second mixing chamber, and the axial cross-sectional area of ​​the second contraction chamber gradually decreases in the direction away from the first mixing chamber; a throat chamber, the input end of the throat chamber is connected with the output end of the second contraction chamber, and the throat chamber is a horizontally arranged cylindrical shape; a second expansion chamber, the input end of the second expansion chamber is connected with the output end of the throat chamber, and the axial cross-sectional area of ​​the second expansion chamber gradually increases in the direction away from the throat chamber.

[0014] According to some embodiments of the present invention, the axial cross-sectional area of ​​the first mixing chamber gradually increases in a direction approaching the first contraction chamber, and the axial cross-sectional area of ​​the output end of the first mixing chamber is smaller than the axial cross-sectional area of ​​the input end of the first contraction chamber.

[0015] According to some embodiments of the present invention, the axial cross-sectional area of ​​the second mixing chamber gradually increases in a direction approaching the second contraction chamber, and the axial cross-sectional area of ​​the output end of the second mixing chamber corresponds to the axial cross-sectional area of ​​the input end of the second contraction chamber.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a structural schematic diagram of a sample introduction device of an online laser particle size analyzer according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Cross-sectional view in

[0020] Figure 3 for Figure 2 Cross-sectional view of the transmission mechanism.

[0021] Figure 4 for Figure 2 Cross-sectional view of the dispersion mechanism.

[0022] Reference numerals:

[0023] Conveying mechanism 100, first mixing chamber 110, first feeding chamber 120, first bucket chamber 121, first guiding chamber 122, first air inlet chamber 130, first air channel 131, first air nozzle 132, first discharging chamber 140, first contraction chamber 141, first expansion chamber 142, connecting pipe 150;

[0024] Dispersing mechanism 200, second mixing chamber 210, second feeding chamber 220, second bucket chamber 221, second guiding chamber 222, second air inlet chamber 230, second air channel 231, second air nozzle 232, second discharging chamber 240, second contraction chamber 241, throat chamber 242, second expansion chamber 243, antistatic tube 250;

[0025] Dry laser scattering measurement mechanism 10. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a first or second description, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] refer to Figures 1 to 4 The sample introduction device of the online laser particle size analyzer according to the embodiment of the utility model is described.

[0031] like Figures 1 to 4As shown, the sample introduction device of the online laser particle size analyzer includes a conveying mechanism 100, which includes a first mixing chamber 110, a first feeding chamber 120, a first air inlet chamber 130 and a first discharge chamber 140. The output end of the first feeding chamber 120 is connected to the first mixing chamber 110, the output end of the first air inlet chamber 130 is connected to the first mixing chamber 110, and the input end of the first discharge chamber 140 is connected to the output end of the first mixing chamber 110. The sample enters the first mixing chamber 110 through the first feeding chamber 120, and the compressed air enters the first mixing chamber 110 through the first air inlet chamber 130, and the sample is output through the first discharge chamber 140; a dispersion mechanism 200, which includes a second mixing chamber 210, a second feeding chamber 220, a second air inlet chamber 230 and a second discharge chamber 140. The feed chamber 240, the input end of the second feed chamber 220 is connected to the output end of the first discharge chamber 140, the output end of the second feed chamber 220 is connected to the second mixing chamber 210, the output end of the second air inlet chamber 230 is connected to the second mixing chamber 210, the input end of the second discharge chamber 240 is connected to the output end of the second mixing chamber 210, the output end of the second discharge chamber 240 is connected to the input end of the dry laser scattering measurement mechanism 10, the compressed air enters the second mixing chamber 210 through the second air inlet chamber 230, and the sample is output to the dry laser scattering measurement mechanism 10 through the second discharge chamber 240; the first air inlet chamber 130, the first mixing chamber 110 and the first discharge chamber 140 are coaxially arranged, and the second air inlet chamber 230, the second mixing chamber 210 and the second discharge chamber 240 are coaxially arranged.

[0032] like Figure 1 and Figure 2 As shown, the output end of the transmission mechanism 100 is connected to the input end of the dispersion mechanism 200, and the output end of the dispersion mechanism 200 is connected to the dry laser scattering measurement mechanism 10. Specifically, as Figure 3 As shown, the upper end of the first mixing chamber 110 is connected to the first feeding chamber 120, the left end is connected to the first air inlet chamber 130, and the right end is connected to the first discharging chamber 140. The first air inlet chamber 130, the first mixing chamber 110 and the first discharging chamber 140 are coaxially arranged in sequence along the left-right direction; Figure 2 and Figure 4As shown, the second feed chamber 220 is connected to the first discharge chamber 140 by a connecting pipe, the upper end of the second mixing chamber 210 is connected to the second feed chamber 220, the left end is connected to the second air inlet chamber 230, and the right end is connected to the second discharge chamber 240. The second air inlet chamber 230, the second mixing chamber 210 and the second discharge chamber 240 are coaxially arranged in sequence along the left and right directions. Thus, the conveying mechanism 100, the dispersing mechanism 200 and the dry laser scattering measuring mechanism 10 are sequentially arranged and connected, and connecting pipes 150 of different lengths are selected between the conveying mechanism 100 and the dispersing mechanism 200 as needed. The dispersing mechanism 200 is arranged near the dry laser scattering measuring mechanism 10 to shorten the pipe distance passed during the particle dispersion process, avoid the dispersed sample from adhering again, improve the practicability of the device, thereby improving the quality and efficiency of the measurement and ensuring the accuracy of the measurement data.

[0033] In some specific embodiments of the present invention, the output end of the second discharge chamber 240 is connected to the input end of the dry laser scattering measurement mechanism 10 through an antistatic tube 250 to eliminate the static electricity generated by sample friction to adsorb particles in the sample, ensuring that all sample particles can reach the dry laser scattering measurement mechanism 10, thereby further improving the accuracy of the measurement data.

[0034] In some specific embodiments of the present invention, the first feed chamber 120 includes: a first bucket chamber 121; a first guide chamber 122, the first guide chamber 122 is coaxially arranged with the first bucket chamber 121, the input end of the first guide chamber 122 is connected with the output end of the first bucket chamber 121, the output end of the first guide chamber 122 is connected with the first mixing chamber 110, the first guide chamber 122 is a vertically arranged cylindrical shape, and the axial height of the first bucket chamber 121 is greater than the axial height of the first guide chamber 122.

[0035] like Figure 3 As shown, the first feed chamber 120 includes a first bucket chamber 121 and a first guide chamber 122. The first bucket chamber 121 is located at the upper end of the first guide chamber 122. The first bucket chamber 121 and the first guide chamber 122 are coaxially arranged along the axis of the vertical direction and are connected to each other. Specifically, the axial cross-sectional area of ​​the first bucket chamber 121 gradually decreases from top to bottom. The first guide chamber 122 is vertically arranged in a uniform cylindrical shape, and its inner diameter corresponds to the inner diameter of the output end of the first bucket chamber 121, and its axial height is greater than the axial height of the first guide chamber 122. As a result, the free-falling sample enters the large-diameter first bucket chamber 121, ensuring that all sample particles can enter the first mixing chamber 110 under the guidance of the first guide chamber 122.

[0036] In some specific embodiments of the present invention, the first air inlet chamber 130 includes: a first air channel 131, which is a horizontally arranged cylindrical shape; a first air nozzle 132, which is coaxially arranged with the first air channel 131, the input end of the first air nozzle 132 is connected with the output end of the first air channel 131, the output end of the first air nozzle 132 is connected with the first mixing chamber 110, and the axial cross-sectional area of ​​the first air nozzle 132 gradually decreases in the direction away from the first air channel 131.

[0037] like Figure 3 As shown, the first air inlet chamber 130 includes a first air channel 131 and a first air nozzle 132. The first air channel 131 is located at the left end of the first air nozzle 132. The first air channel 131 and the first air nozzle 132 are coaxially arranged along the axis of the left-right direction and are interconnected. Specifically, the first air channel 131 is arranged horizontally in a uniform cylindrical shape, the axial cross-sectional area of ​​the first air nozzle 132 gradually decreases from left to right, and a first air port is arranged between the first air channel 131 and the first air nozzle 132. The inner diameter of the first air port is smaller than the inner diameter of the first air channel 131 and the inner diameter of the input end of the first air nozzle 132. Thus, the compressed air enters from the first air channel 131, and the compressed air passing through the first air port changes diameter and speeds up before entering the first mixing chamber 110, so as to blow the free-falling sample into the first discharge chamber 140.

[0038] In some specific embodiments of the present invention, the first discharge chamber 140 includes: a first contraction chamber 141, the input end of the first contraction chamber 141 is connected to the output end of the first mixing chamber 110, and the axial cross-sectional area of ​​the first contraction chamber 141 gradually decreases in the direction away from the first mixing chamber 110; a first expansion chamber 142, the input end of the first expansion chamber 142 is connected to the output end of the first contraction chamber 141, and the axial cross-sectional area of ​​the first expansion chamber 142 gradually increases in the direction away from the first contraction chamber 141.

[0039] like Figure 3As shown, the first discharge chamber 140 includes a first contraction chamber 141 and a first expansion chamber 142. The first contraction chamber 141 is located between the first expansion chamber 142 and the first mixing chamber 110. The first contraction chamber 141 and the first expansion chamber 142 are coaxially arranged along the axis in the left-right direction and are interconnected. Specifically, the axial cross-sectional area of ​​the first contraction chamber 141 gradually decreases from left to right, and the cross-sectional area of ​​the first expansion chamber 142 gradually increases from left to right, and the inner diameter of the output end of the first contraction chamber 141 corresponds to the inner diameter of the input end of the first expansion chamber 142. Furthermore, the axial cross-sectional area of ​​the first mixing chamber 110 gradually increases from left to right, and the axial cross-sectional area of ​​the output end of the first mixing chamber 110 is smaller than the axial cross-sectional area of ​​the input end of the first contraction chamber 141. When high-pressure air enters the first contraction chamber 141 from the first mixing chamber 110, the pressure of the compressed air decreases as the inner diameter of the first contraction chamber 141 suddenly increases. When the sample enters the first expansion chamber 142 from the first contraction chamber 141, the sample will diffuse along the inner wall of the first expansion chamber 142, thereby avoiding the sample from being broken by the high-pressure gas while ensuring that the particles in the sample will not stick together, so that all sample particles are output in a complete state, thereby ensuring the accuracy of the measurement data.

[0040] In some specific embodiments of the present invention, the second feed chamber 220 includes: a second bucket chamber 221; a second guide chamber 222, the second guide chamber 222 is coaxially arranged with the second bucket chamber 221, the input end of the second guide chamber 222 is connected with the output end of the second bucket chamber 221, the output end of the second guide chamber 222 is connected with the second mixing chamber 210, the second guide chamber 222 is a vertically arranged cylindrical shape, and the axial height of the second bucket chamber 221 is smaller than the axial height of the second guide chamber 222.

[0041] like Figure 4 As shown, the second feed chamber 220 includes a second bucket chamber 221 and a second guide chamber 222. The second bucket chamber 221 is located at the upper end of the second guide chamber 222. The second bucket chamber 221 and the second guide chamber 222 are coaxially arranged along the axis of the vertical direction and are interconnected. Specifically, the axial cross-sectional area of ​​the second bucket chamber 221 gradually decreases from top to bottom. The second guide chamber 222 is vertically arranged in a uniform cylindrical shape, and its inner diameter corresponds to the inner diameter of the output end of the second bucket chamber 221. Its axial height is greater than the axial height of the second guide chamber 222. The sample output by the first discharge chamber 140 enters the second bucket chamber 221, and after the second guide chamber 222 changes diameter and speeds up, it oscillates back and forth in the narrow second guide chamber 222. After the sample fully collides and rubs against the tube wall, it achieves a preliminary dispersion effect and falls into the first mixing chamber 110.

[0042] In some specific embodiments of the present invention, the second air inlet chamber 230 includes: a second air channel 231, which is a horizontally arranged cylindrical shape; a second air nozzle 232, which is coaxially arranged with the second air channel 231, the input end of the second air nozzle 232 is connected with the output end of the second air channel 231, the output end of the second air nozzle 232 is connected with the second mixing chamber 210, and the axial cross-sectional area of ​​the second air nozzle 232 gradually decreases in the direction away from the second air channel 231.

[0043] like Figure 4 As shown, the second air inlet chamber 230 includes a second air channel 231 and a second air nozzle 232. The second air channel 231 is located at the left end of the second air nozzle 232. The second air channel 231 and the second air nozzle 232 are coaxially arranged along the axis of the left-right direction and are interconnected. Specifically, the second air channel 231 is arranged horizontally in a uniform cylindrical shape, the axial cross-sectional area of ​​the second air nozzle 232 gradually decreases from left to right, and a second air port is arranged between the second air channel 231 and the second air nozzle 232. The inner diameter of the second air port is smaller than the inner diameter of the second air channel 231 and the inner diameter of the input end of the second air nozzle 232. Thus, the compressed air enters from the second air channel 231, and the compressed air passing through the second air port changes diameter and speeds up before entering the second mixing chamber 210, and blows the preliminarily dispersed sample particles into the second discharge chamber 240.

[0044] In some specific embodiments of the present invention, the second discharge chamber 240 includes: a second contraction chamber 241, the input end of the second contraction chamber 241 is connected to the output end of the second mixing chamber 210, and the axial cross-sectional area of ​​the second contraction chamber 241 gradually decreases in the direction away from the first mixing chamber 110; a throat chamber 242, the input end of the throat chamber 242 is connected to the output end of the second contraction chamber 241, and the throat chamber 242 is a horizontally arranged cylindrical shape; a second expansion chamber 243, the input end of the second expansion chamber 243 is connected to the output end of the throat chamber 242, and the axial cross-sectional area of ​​the second expansion chamber 243 gradually increases in the direction away from the throat chamber 242.

[0045] like Figure 4As shown, the second discharge chamber 240 includes a second contraction chamber 241, a throat chamber 242 and a second expansion chamber 243. The second contraction chamber 241 is located between the throat chamber 242 and the second mixing chamber 210. The second contraction chamber 241, the throat chamber 242 and the second expansion chamber 243 are coaxially arranged along the axis in the left-right direction and are interconnected. Specifically, the axial cross-sectional area of ​​the second contraction chamber 241 gradually decreases from left to right, the throat chamber 242 is arranged horizontally in a uniform cylindrical shape, the cross-sectional area of ​​the second expansion chamber 243 gradually increases from left to right, and the inner diameter of the output end of the second contraction chamber 241, the inner diameter of the throat chamber 242 and the inner diameter of the input end of the second expansion chamber 243 correspond. Furthermore, the axial cross-sectional area of ​​the second mixing chamber 210 gradually increases from left to right, and the axial cross-sectional area of ​​the output end of the second mixing chamber 210 corresponds to the axial cross-sectional area of ​​the input end of the second contraction chamber 241. When high-pressure air enters the second contraction chamber 241 from the second mixing chamber 210, the pressure of the compressed air decreases as the inner diameter of the first contraction chamber 141 suddenly increases. When the sample enters the first expansion chamber 142 from the first contraction chamber 141, the sample will diffuse along the inner wall of the first expansion chamber 142, thereby avoiding the sample from being broken by the high-pressure gas while ensuring that the particles in the sample will not stick together, so that all sample particles are output in a complete state, thereby ensuring the accuracy of the measurement data.

[0046] The sample after preliminary dispersion falls into the second mixing chamber 210 and flows into the second contraction chamber 241 together with the compressed air. The high-speed airflow oscillates back and forth in the narrow throat chamber 242 after contraction and diameter change and acceleration. The sample fully collides and rubs against the tube wall to achieve the final dispersion effect. When the dispersed sample passes through the second diffusion chamber, it will diffuse along the inner wall of the second diffusion chamber according to the wall attachment principle, thereby preventing the sample from sticking again.

[0047] In some specific embodiments of the utility model, a conveying mechanism 100 and a dispersing mechanism 200 are sequentially arranged, and a connecting pipe 150 of any length is arranged according to the on-site environment to connect the two, so that the distance between the conveying mechanism 100 and the dispersing mechanism 200 will not affect the transportation of the sample, and at the same time, it can also prevent the sample from being broken by high-pressure gas due to long-distance transportation. Then, the dispersing mechanism 200 is further arranged at the front end of the dry laser scattering measurement mechanism 10 through an anti-static tube 250. On the one hand, the pipe distance that the sample particles need to pass through after dispersion is shortened, and on the other hand, the influence of static electricity generated by particle friction on sample measurement is eliminated, so that the dispersed sample will not stick again, ensuring that sample particles of all particle sizes can be output for measurement, thereby improving the quality of measurement.

[0048] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A sample introduction device for an online laser particle size analyzer, characterized in that: include: A conveying mechanism (100), the conveying mechanism (100) comprising a first mixing chamber (110), a first feeding chamber (120), a first air inlet chamber (130) and a first discharge chamber (140), the output end of the first feeding chamber (120) being in communication with the first mixing chamber (110), the output end of the first air inlet chamber (130) being in communication with the first mixing chamber (110), the input end of the first discharge chamber (140) being in communication with the output end of the first mixing chamber (110), the sample entering the first mixing chamber (110) through the first feeding chamber (120), the compressed air entering the first mixing chamber (110) through the first air inlet chamber (130), and the sample being output through the first discharge chamber (140); A dispersion mechanism (200), the dispersion mechanism (200) comprising a second mixing chamber (210), a second feed chamber (220), a second air inlet chamber (230) and a second discharge chamber (240), the input end of the second feed chamber (220) being in communication with the output end of the first discharge chamber (140), the output end of the second feed chamber (220) being in communication with the second mixing chamber (210), the output end of the second air inlet chamber (230) being in communication with the second mixing chamber (210), the input end of the second discharge chamber (240) being in communication with the output end of the second mixing chamber (210), the output end of the second discharge chamber (240) being in communication with the input end of the dry laser scattering measurement mechanism (10), compressed air entering the second mixing chamber (210) through the second air inlet chamber (230), and outputting the sample to the dry laser scattering measurement mechanism (10) through the second discharge chamber (240); The first air inlet chamber (130), the first mixing chamber (110) and the first discharge chamber (140) are coaxially arranged, and the second air inlet chamber (230), the second mixing chamber (210) and the second discharge chamber (240) are coaxially arranged.

2. The sample introduction device of the online laser particle size analyzer according to claim 1, characterized in that: The output end of the second discharge chamber (240) is connected to the input end of the dry laser scattering measurement mechanism (10) via an antistatic tube (250).

3. The sample introduction device of the online laser particle size analyzer according to claim 1, characterized in that: The first feeding chamber (120) comprises: A first bucket cavity (121); A first guide chamber (122), wherein the first guide chamber (122) is coaxially arranged with the first bucket chamber (121), the input end of the first guide chamber (122) is connected with the output end of the first bucket chamber (121), the output end of the first guide chamber (122) is connected with the first mixing chamber (110), the first guide chamber (122) is in the shape of a vertically arranged cylinder, and the axial height of the first bucket chamber (121) is greater than the axial height of the first guide chamber (122).

4. The sample introduction device of the online laser particle size analyzer according to claim 1, characterized in that: The first air inlet cavity (130) comprises: A first air channel (131), wherein the first air channel (131) is in the shape of a horizontally arranged cylinder; A first gas nozzle (132), the first gas nozzle (132) is coaxially arranged with the first gas channel (131), the input end of the first gas nozzle (132) is connected with the output end of the first gas channel (131), the output end of the first gas nozzle (132) is connected with the first mixing chamber (110), and the axial cross-sectional area of ​​the first gas nozzle (132) gradually decreases in a direction away from the first gas channel (131).

5. The sample introduction device of the online laser particle size analyzer according to claim 1, characterized in that: The first discharge chamber (140) comprises: a first contraction chamber (141), wherein an input end of the first contraction chamber (141) is connected to an output end of the first mixing chamber (110), and an axial cross-sectional area of ​​the first contraction chamber (141) gradually decreases in a direction away from the first mixing chamber (110); A first expansion chamber (142), wherein the input end of the first expansion chamber (142) is connected to the output end of the first contraction chamber (141), and the axial cross-sectional area of ​​the first expansion chamber (142) gradually increases in a direction away from the first contraction chamber (141).

6. The sample introduction device of the online laser particle size analyzer according to claim 2, characterized in that: The second feeding chamber (220) comprises: A second bucket chamber (221); A second guide chamber (222), wherein the second guide chamber (222) is coaxially arranged with the second bucket chamber (221), the input end of the second guide chamber (222) is connected with the output end of the second bucket chamber (221), the output end of the second guide chamber (222) is connected with the second mixing chamber (210), the second guide chamber (222) is in the shape of a vertically arranged cylinder, and the axial height of the second bucket chamber (221) is smaller than the axial height of the second guide chamber (222).

7. The sample introduction device of the online laser particle size analyzer according to claim 2, characterized in that: The second air inlet cavity (230) comprises: A second air channel (231), wherein the second air channel (231) is in the shape of a horizontally arranged cylinder; A second gas nozzle (232), the second gas nozzle (232) is coaxially arranged with the second gas channel (231), the input end of the second gas nozzle (232) is connected with the output end of the second gas channel (231), the output end of the second gas nozzle (232) is connected with the second mixing chamber (210), and the axial cross-sectional area of ​​the second gas nozzle (232) gradually decreases in a direction away from the second gas channel (231).

8. The sample introduction device of the online laser particle size analyzer according to claim 2, characterized in that: The second discharge chamber (240) comprises: a second contraction chamber (241), wherein an input end of the second contraction chamber (241) is connected to an output end of the second mixing chamber (210), and an axial cross-sectional area of ​​the second contraction chamber (241) gradually decreases in a direction away from the first mixing chamber (110); A laryngeal cavity (242), wherein the input end of the laryngeal cavity (242) is connected to the output end of the second contraction cavity (241), and the laryngeal cavity (242) is in a horizontally arranged cylindrical shape; A second expansion cavity (243), wherein the input end of the second expansion cavity (243) is connected to the output end of the throat cavity (242), and the axial cross-sectional area of ​​the second expansion cavity (243) gradually increases in a direction away from the throat cavity (242).

9. The sample introduction device of the online laser particle size analyzer according to claim 5, characterized in that: The axial cross-sectional area of ​​the first mixing chamber (110) gradually increases in a direction approaching the first contraction chamber (141), and the axial cross-sectional area of ​​the output end of the first mixing chamber (110) is smaller than the axial cross-sectional area of ​​the input end of the first contraction chamber (141).

10. The sample introduction device of the online laser particle size analyzer according to claim 8, characterized in that: The axial cross-sectional area of ​​the second mixing chamber (210) gradually increases in a direction approaching the second contraction chamber (241), and the axial cross-sectional area of ​​the output end of the second mixing chamber (210) corresponds to the axial cross-sectional area of ​​the input end of the second contraction chamber (241).

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