Laser particle size analyzer with inner pipeline anti-blocking function

Abstract

The present disclosure relates to the technical field of laser particle size analyzers, and one embodiment of the present disclosure provides an inner pipeline anti-blocking laser particle size analyzer, which comprises an analysis device, a shell, a sample processing mechanism, a secondary processing mechanism and a liquid changing mechanism. The sample processing mechanism is used for dilution and mixing treatment of a sample. The secondary processing mechanism is arranged below the sample processing mechanism and is used for secondary dilution and mixing treatment of the sample in the sample processing mechanism. The liquid changing mechanism is connected with the secondary processing mechanism. The liquid changing mechanism is connected with a sample cell mechanism. The liquid changing mechanism is used for conveying the sample in the secondary processing mechanism to the sample cell mechanism. The sample cell mechanism is used for guiding the sample into the analysis device for analysis. Through the above technical solution, the technical problem that the internal pipeline of the laser particle size analyzer in the related art / prior art may be blocked is solved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of laser particle size analyzers, and in particular, to a laser particle size analyzer with anti-blocking internal pipeline. Background Art

[0002] Laser particle size analyzer is an instrument used to measure particle size distribution. It is widely used in chemical, pharmaceutical, food, environmental protection and other fields. Its working principle is based on laser scattering technology. It can quickly and accurately analyze the size and distribution of particles. The laser particle size analyzer consists of analysis equipment and sample processing equipment. The analysis equipment is equipped with a laser source, sample cell, detector and other parts. The laser source scatters the sample in the sample cell, and the laser irradiates the particles in the sample and scatters. The detector collects and captures the scattered laser and converts it into an electrical signal, and then analyzes the particle size distribution diagram, average particle size, particle size distribution width and other results in the sample. Laser particle size analyzer is widely used in chemical, pharmaceutical, food and other industries.

[0003] When a laser particle size analyzer analyzes a liquid sample, it is usually necessary to use a sample processing device to disperse the sample, add a solvent to dilute it and adjust the ratio, and then pass the sample into the sample cell in the analyzer. The laser source in the analyzer irradiates the liquid sample through the lens on the sample cell to analyze the liquid sample and obtain the result. In actual use, due to the different number, diameter and viscosity of particles in the sample, it is very likely that blockage will occur in the internal pipeline of the analyzer. The blockage of the internal pipeline will make it difficult for the liquid sample to flow. If it is not completely blocked, it will affect the test results of the sample. However, if it is completely blocked, the sample cannot flow and the internal pipeline needs to be repaired, which affects the efficiency of sample analysis. Summary of the Invention

[0004] To overcome the above-mentioned defects, the embodiments of the present disclosure provide a laser particle size analyzer with anti-clogging internal pipelines, which solves the technical problem in the prior art that the internal pipelines in laser particle size analyzers are likely to be clogged.

[0005] According to one aspect, at least one embodiment of the present disclosure provides a laser particle size analyzer with anti-blocking internal pipelines, comprising an analysis device, a shell, a sample processing mechanism, a secondary processing mechanism and a liquid exchange mechanism, wherein the shell is fixedly connected to the side of the analysis device, the sample processing mechanism is arranged in the shell, the sample processing mechanism is used to dilute and mix the sample, the secondary processing mechanism is arranged in the shell, the secondary processing mechanism is arranged below the sample processing mechanism, the secondary processing mechanism is used to perform secondary dilution and mixing treatment on the sample in the sample processing mechanism, the liquid exchange mechanism is arranged in the shell, the liquid exchange mechanism is connected to the secondary processing mechanism, the liquid exchange mechanism is connected to a sample pool mechanism, the liquid exchange mechanism is used to transport the sample in the secondary processing mechanism to the sample pool mechanism, wherein the sample pool mechanism is detachably arranged on the analysis device, and the sample pool mechanism is used to introduce the sample into the analysis device for analysis.

[0006] The sample processing mechanism includes a lifting frame, a stirring frame, a motor, a stirring paddle 1 and a stirring assembly, the lifting frame is fixedly connected to the shell, the stirring frame is slidably connected to the lifting frame, the motor is fixedly arranged on the stirring frame, the stirring paddle 1 is fixedly connected to the output end of the motor, the stirring assembly is fixedly arranged on the shell, the stirring paddle 1 can be extended into the stirring assembly, and the stirring assembly is used to hold the sample.

[0007] The stirring assembly includes a stirring drum, a filter plate and a discharge port. The stirring drum is fixedly connected to the shell. A plurality of filter plates are provided. The plurality of filter plates are detachably arranged inside the stirring drum. The discharge port is opened at the bottom of the stirring drum. A discharge valve is fixedly connected to the discharge port.

[0008] The secondary processing mechanism includes a dilution dish, a second discharge port and a second stirring paddle. The dilution dish is fixedly connected to the shell, the dilution dish is arranged below the mixing drum, the first discharge valve is arranged above the dilution dish, the second discharge port is opened below the dilution dish, and the second discharge port is fixedly connected to the second discharge valve. The second stirring paddle is rotatably arranged at the bottom of the mixing drum, the second stirring paddle extends into the dilution dish, the second stirring paddle passes through the mixing drum, the end of the first stirring paddle close to the mixing drum can be connected to the second stirring paddle, and the first stirring paddle and the second stirring paddle are detachably connected.

[0009] The liquid exchange mechanism includes a water pump 1, a liquid supply pipe, a liquid discharge pipe, a dilution liquid tank, a liquid discharge tank and a water pump 2. The water pump 1 is fixedly installed on the shell, the water inlet of the water pump 1 is connected with the discharge valve 2, the liquid supply pipe is connected with the drain outlet of the water pump 1, the liquid supply pipe is connected with the sample pool mechanism, the liquid discharge pipe is fixedly connected to the shell, the liquid discharge pipe is connected with the sample pool mechanism, the liquid exchange mechanism also includes: the dilution liquid tank is fixedly connected in the shell, the liquid discharge tank is fixedly connected in the shell, the liquid discharge pipe is connected with the bottom of the liquid discharge tank, the water inlet on the water pump 2 is connected with the dilution liquid tank, the water outlet of the water pump 2 is connected with an addition pipe, and the addition pipe is arranged above the dilution dish.

[0010] The sample pool mechanism includes a sample pool slot, sample slot plate 1, sample slot plate 2 and a clamping clamp. The sample pool slot is opened on the analysis equipment. The sample slot plate 1 is detachably arranged in the sample pool slot. The liquid supply pipe and the liquid discharge pipe are both connected to the sample slot plate 1. The sample slot plate 2 is detachably connected to the sample slot plate 1. The clamping clamp is provided on the sample slot plate 1 and the sample slot plate 2. The clamping clamp is detachably connected to the sample pool slot.

[0011] The sample slot plate 1 is provided with a guide channel, a detection channel, a steering wheel and a lens piece. The guide channel is opened on the sample slot plate 1, and the detection channel is opened on the sample slot plate 1. The guide channel and the detection channel are connected. The steering wheel is rotatably arranged on the sample slot plate 1, and the steering wheel is arranged at the connection between the guide channel and the detection channel. The lens piece can be detachably arranged on both the sample slot plate 1 and the sample slot plate 2. The lens piece is arranged at the central position of the detection channel. The liquid supply pipe is connected to the guide channel, and the liquid discharge pipe is connected to the detection channel.

[0012] The beneficial effects of the embodiments of the present disclosure are:

[0013] 1. In the present invention, by providing a dilution dish and a diluent reservoir, the sample is diluted and mixed once in the stirring drum. When a high particle concentration is detected in the sample solution, the second discharge valve is opened to discharge the diluent in the dilution reservoir into the dilution dish. The first discharge valve is opened to discharge the sample in the stirring drum into the dilution dish through the first discharge port. The first stirring paddle drives the second stirring paddle to rotate. The second stirring paddle stirs and mixes the sample and the dilution solution in the dilution dish to obtain a further diluted sample solution.

[0014] 2. In the present invention, by providing a flow guide channel and a detection channel, the flow rate of the sample solution is reduced during the flow process. At the same time, the steering wheel rotates under the impact of the sample solution in the flow guide channel. The rotation of the steering wheel can prevent the presence of a position in the sample slot plate where the solution remains stationary;

[0015] 3. In the present invention, by providing a secondary processing mechanism, the sample solution can be diluted twice when the concentration of particles in the sample solution is high, resulting in a lower particle concentration and reduced risk of blockage. By providing a guide channel and a detection channel in the sample pool mechanism, the steering wheel rotates when the sample solution flows to prevent the solution from standing still in the sample slot plate 1, reducing the precipitation of particles. At the same time, the reduced solution flow rate can also facilitate accurate detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly describes the drawings required for use in describing the embodiments of the present disclosure. Obviously, the drawings described below are merely some exemplary embodiments of the present disclosure. Those skilled in the art can, without inventive effort, derive other drawings based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of another perspective of the present invention as a whole;

[0019] Figure 3 It is a schematic diagram of a partial internal cross-sectional structure of the shell in the present invention;

[0020] Figure 4 Schematic diagram of the internal cross-sectional structure of the shell and the sample pool mechanism in the present invention;

[0021] Figure 5 Schematic diagram of the partial internal cross-sectional structure of the mixing drum and dilution dish in the present invention;

[0022] Figure 6 Schematic diagram of the structure of the sample pool mechanism in the present invention;

[0023] Figure 7 Schematic diagram of the internal cross-sectional structure of the sample slot plate 1 in the present invention.

[0024] In the figure: 1, analysis equipment; 2, shell; 3, lifting frame; 4, stirring frame; 5, motor; 6, stirring paddle one; 7, stirring cylinder; 8, filter plate; 9, discharge port one; 10, discharge valve one; 11, dilution dish; 12, discharge port two; 13, discharge valve two; 14, stirring paddle two; 15, water pump one; 16, liquid supply pipe; 17, liquid discharge pipe; 18, dilution liquid bin; 19, liquid discharge bin; 20, water pump two; 21, sample pool slot; 22, sample tank plate one; 23, sample tank plate two; 24, clamping clamp; 25, flow guide channel; 26, detection channel; 27, steering wheel; 28, lens sheet. DETAILED DESCRIPTION

[0025] The present disclosure will be further described in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, but not to limit the present disclosure.

[0026] In order to make the drawing simple, only the parts related to the disclosure are shown in each figure, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some figures, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0027] In this paper, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0028] In the present disclosure, unless otherwise specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0029] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, 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. Therefore, they should not be understood as limitations on the present disclosure.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] like Figures 1 to 7 As shown, it shows a laser particle size analyzer with anti-blocking of internal pipelines in one embodiment of the present disclosure, including an analysis device 1, a shell 2, a sample processing mechanism, a secondary processing mechanism and a liquid exchange mechanism. The shell 2 is fixedly connected to the side of the analysis device 1, and the sample processing mechanism is arranged in the shell 2. The sample processing mechanism is used to dilute and mix the sample. The secondary processing mechanism is arranged in the shell 2. The secondary processing mechanism is arranged below the sample processing mechanism. The secondary processing mechanism is used to perform secondary dilution and mixing treatment on the sample in the sample processing mechanism. The liquid exchange mechanism is arranged in the shell 2. The liquid exchange mechanism is connected to the secondary processing mechanism. The liquid exchange mechanism is connected to a sample pool mechanism. The liquid exchange mechanism is used to transport the sample in the secondary processing mechanism to the sample pool mechanism, wherein the sample pool mechanism is detachably arranged on the analysis device 1, and the sample pool mechanism is used to introduce the sample into the analysis device 1 for analysis.

[0032] like Figures 1 to 5 As shown, the sample processing mechanism includes a lifting frame 3, a stirring frame 4, a motor 5, a stirring paddle 6 and a stirring assembly. The lifting frame 3 is fixedly connected to the shell 2, the stirring frame 4 is slidably connected to the lifting frame 3, the motor 5 is fixedly set on the stirring frame 4, the stirring paddle 6 is fixedly connected to the output end of the motor 5, the stirring assembly is fixedly set on the shell 2, the stirring paddle 6 can be extended into the stirring assembly, the stirring assembly is used to hold the sample, the stirring assembly includes a stirring drum 7, a filter plate 8 and a discharge port 9, the stirring drum 7 is fixedly connected to the shell 2, a plurality of filter plates 8 are provided, and the plurality of filter plates 8 are detachably set inside the stirring drum 7, and the discharge port 9 is opened at the stirring drum 7. At the bottom of the mixing drum 7, a discharge port 9 is fixedly connected to a discharge valve 10. When the sample and the dilution solvent are added to the mixing drum 7, the output end of the motor 5 drives the stirring paddle 6 to rotate, and the stirring paddle 6 drives the sample and the dilution solvent to rotate and mix. At the same time, the dilution solvent impacts the filter plate 8 to filter out the oversized particles in the sample. By sliding the stirring frame 4 on the lifting frame 3, the stirring paddle 6 can be lifted upward and moved to the top of the mixing drum 7, which is convenient for cleaning the inside of the mixing drum 7. After filtering the large particles in the sample, the large particles can be prevented from clogging in the sample pool mechanism. Since the filter plate 8 is detachable, it is easy to clean.

[0033] like Figure 4~Figure 5 As shown, the secondary processing mechanism includes a dilution dish 11, a second discharge port 12 and a second stirring paddle 14. The dilution dish 11 is fixedly connected to the housing 2 and is arranged below the mixing drum 7. The discharge valve 10 is arranged above the dilution dish 11. The second discharge port 12 is opened below the dilution dish 11. The second discharge valve 13 is fixedly connected to the second discharge port 12. The second stirring paddle 14 is rotatably arranged at the bottom of the mixing drum 7. The second stirring paddle 14 extends into the dilution dish 11 and penetrates the mixing drum 7. The end of the stirring paddle 6 close to the mixing drum 7 can be connected to the second stirring paddle 14. The stirring paddle 6 is detachably connected to the second stirring paddle 14. The dilution dish 11 is arranged below the mixing drum 7. When the test is performed, the discharge valve 10 is opened to release the sample into the dilution dish 11, and the sample is transported to the sample through the water pump 15 and the liquid supply pipe 16. The detection is carried out in the pool mechanism. When a large number of particles are detected in the sample, a secondary dilution can be performed through the dilution dish 11, and the discharge valve 2 13 is opened to discharge the dilution liquid in the dilution liquid tank 18 into the dilution dish 11. The discharge valve 10 is opened to discharge the sample in the stirring drum 7 into the dilution dish 11 through the discharge port 9. The stirring paddle 16 drives the stirring paddle 2 14 to rotate, and the stirring paddle 2 14 stirs and mixes the sample and the dilution solution in the dilution dish 11. When the stirring is completed, the discharge valve 2 13 is opened, and the liquid in the dilution dish 11 is transported to the water pump 15 through the discharge port 2 12, and is transported to the sample slot plate 1 22 through the water pump 15. The liquid after the detection is completed is transported to the drainage bin 19 through the drain pipe 17. By regulating the secondary dilution, the number of particles in the liquid entering the sample slot plate 22 can be reduced, and the risk of clogging can be reduced.

[0034] like Figure 4~Figure 5 As shown, the liquid exchange mechanism includes a water pump 15, a liquid supply pipe 16, a drain pipe 17, a dilution liquid tank 18, a drain pipe 19 and a water pump 20. The water pump 15 is fixedly installed on the shell 2, the water inlet of the water pump 15 is connected to the discharge valve 2 13, the liquid supply pipe 16 is connected to the drain outlet of the water pump 15, the liquid supply pipe 16 is connected to the sample pool mechanism, the drain pipe 17 is fixedly connected to the shell 2, the drain pipe 17 is connected to the sample pool mechanism, the liquid exchange mechanism also includes a dilution liquid tank 18 fixedly connected in the shell 2, the drain pipe 19 is fixedly connected in the shell 2, the drain pipe 17 is connected to the bottom of the drain pipe 19, the water inlet on the water pump 20 is connected to the dilution liquid tank 18, and the water outlet of the water pump 20 is connected with an addition pipe, which is arranged above the dilution dish 11.

[0035] like Figure 6-7As shown, the sample pool mechanism includes a sample pool slot 21, a sample slot plate 1 22, a sample slot plate 23 and a clamping clamp 24. The sample pool slot 21 is opened on the analysis device 1, and the sample slot plate 1 22 is detachably arranged in the sample pool slot 21. The liquid supply pipe 16 and the liquid discharge pipe 17 are both connected to the sample slot plate 1 22. The sample slot plate 23 is detachably connected to the sample slot plate 1 22. The clamping clamp 24 is sleeved on the sample slot plate 1 22 and the sample slot plate 2 23. The clamping clamp 24 is detachably connected to the sample pool slot 21. After the sample slot plate 1 22 and the sample slot plate 2 23 are spliced, they are fixed by the clamping clamp 24, and the sample slot plate 1 22 and the sample slot plate 2 23 are extended into the sample pool slot 21. The laser source in the analysis device 1 can detect the sample solution through the lens piece 28.

[0036] like Figure 6-7 As shown, the sample slot plate 1 22 is provided with a guide channel 25, a detection channel 26, a steering wheel 27 and a lens piece 28. The guide channel 25 is opened on the sample slot plate 1 22, and the detection channel 26 is opened on the sample slot plate 1 22. The guide channel 25 and the detection channel 26 are connected. The steering wheel 27 is rotatably set on the sample slot plate 1 22. The steering wheel 27 is set at the connection between the guide channel 25 and the detection channel 26. The sample slot plate 1 22 and the sample slot plate 2 23 are both detachably provided with a lens piece 28. The lens piece 28 is set at the central position of the detection channel 26. The liquid supply pipe 16 is connected to the guide channel 25, the drain pipe 17 is connected to the detection channel 26, and the solution in the liquid supply pipe 16 is connected to the guide channel 25. The solution enters the guide channel 25 and impacts the steering wheel 27. As the steering wheel 27 rotates, the solution enters the detection channel 26. The diameters of the guide channel 25 and the detection channel 26 are larger than the inner diameter of the liquid supply tube 16. The flow rate of the solution slows down when entering the guide channel 25 and the detection channel 26. When the sample solution impacts the steering wheel 27, the solution can flow to the detection channel 26 better, avoiding a dead zone at the connection between the guide channel 25 and the detection channel 26, where the solution does not flow. The width of the central position of the detection channel 26 is larger than the two ends of the detection channel 26. When the sample solution enters the detection channel 26, the flow rate will be further reduced, and it is convenient to detect after passing through the lens piece 28.

[0037] In the present invention, the sample and the dilution solvent are added to the mixing drum 7, and the output end of the motor 5 drives the stirring paddle 1 6 and the stirring paddle 2 14 to rotate. The sample is diluted in the mixing drum 7, and at the same time, the sample solution passes through the filter plate 8 to filter out large particles. After the sample is diluted, the discharge valve 10 is opened, and the sample solution enters the dilution dish 11 through the discharge port 9. After the discharge valve 2 13 is opened, the sample solvent is transported to the sample tank plate 1 22 through the liquid supply pipe 16 by the water pump 15. The sample solution impacts the steering wheel 27 through the guide channel 25 and enters the sample tank plate 1 In the detection channel 26, the laser source and detector in the analysis device 1 perform detection and analysis when the sample solution passes through the lens 28. When it is detected that there are too many particles in the sample solution, the discharge valve 2 13 is closed, and the discharge valve 10 is opened to release the sample solution into the dilution dish 11. The water pump 2 20 transports the diluent in the dilution liquid reservoir 18 to the dilution dish 11. The stirring paddle 2 14 mixes the sample solution and the diluent. When the mixing is completed, the discharge valve 2 13 is opened to transport the second diluted sample solution to the sample tank 1 through the water pump 15 and the liquid supply pipe 16.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all of these should be included in the scope of the claims of the present disclosure.

Claims

1. A laser particle size analyzer with anti-blocking inner pipeline, comprising an analysis device (1), characterized in that: Also includes: A housing (2), the housing (2) being fixedly connected to a side of the analysis device (1); A sample processing mechanism, the sample processing mechanism being arranged in the housing (2) and being used for performing dilution and mixing processing on the sample; A secondary processing mechanism, the secondary processing mechanism being arranged in the housing (2), the secondary processing mechanism being arranged below the sample processing mechanism, and the secondary processing mechanism being used to perform secondary dilution and mixing processing on the sample in the sample processing mechanism; A liquid replacement mechanism, the liquid replacement mechanism being arranged in the housing (2), the liquid replacement mechanism being connected to the secondary processing mechanism, the liquid replacement mechanism being connected to a sample pool mechanism, and the liquid replacement mechanism being used to transport the sample in the secondary processing mechanism to the sample pool mechanism; The sample pool mechanism is detachably mounted on the analysis device (1), and is used to introduce a sample into the analysis device (1) for analysis. The liquid replacement mechanism comprises: A water pump (15), wherein the water pump (15) is fixedly mounted on the housing (2); A liquid supply pipe (16), the liquid supply pipe (16) is connected to the drain outlet of the water pump (15), and the liquid supply pipe (16) is connected to the sample pool mechanism; a liquid discharge pipe (17), the liquid discharge pipe (17) being fixedly connected to the housing (2), and the liquid discharge pipe (17) being in communication with the sample pool mechanism; The sample pool mechanism comprises: A sample pool slot (21), the sample pool slot (21) being provided on the analysis device (1); A sample slot plate (22) is detachably disposed in the sample pool slot (21), and the liquid supply pipe (16) and the liquid discharge pipe (17) are both connected to the sample slot plate (22); A second sample slot plate (23), wherein the second sample slot plate (23) is detachably connected to the first sample slot plate (22); A clamping clamp (24), wherein the clamping clamp (24) is sleeved on the sample slot plate 1 (22) and the sample slot plate 2 (23), and the clamping clamp (24) is detachably connected to the sample pool slot (21); The sample slot plate 1 (22) is provided with: A flow guide channel (25), wherein the flow guide channel (25) is provided on the sample slot plate 1 (22); A detection channel (26), wherein the detection channel (26) is provided on the sample slot plate 1 (22), and the guide channel (25) and the detection channel (26) are connected; A steering wheel (27), the steering wheel (27) being rotatably disposed on the sample slot plate 1 (22), and the steering wheel (27) being disposed at a connection between the guide channel (25) and the detection channel (26); A lens sheet (28) is detachably provided on both the sample slot plate 1 (22) and the sample slot plate 2 (23), and the lens sheet (28) is provided at the center of the detection channel (26).

2. The laser particle size analyzer with anti-blocking inner pipeline according to claim 1, characterized in that: The sample processing mechanism comprises: A lifting frame (3), the lifting frame (3) being fixedly connected to the housing (2); A stirring frame (4), wherein the stirring frame (4) is slidably connected to the lifting frame (3); A motor (5), wherein the motor (5) is fixedly mounted on the stirring frame (4); A stirring paddle (6), wherein the stirring paddle (6) is fixedly connected to the output end of the motor (5); A stirring assembly is fixedly arranged on the housing (2), and the stirring paddle (6) can extend into the stirring assembly. The stirring assembly is used to hold the sample.

3. The laser particle size analyzer with anti-blocking inner pipeline according to claim 2, characterized in that: The stirring assembly comprises: A mixing drum (7), the mixing drum (7) being fixedly connected to the housing (2); A filter plate (8), wherein a plurality of filter plates (8) are provided, and the plurality of filter plates (8) are detachably arranged inside the mixing drum (7); A discharge port (9) is provided at the bottom of the mixing drum (7), and a discharge valve (10) is fixedly connected to the discharge port (9).

4. The laser particle size analyzer with anti-blocking inner pipeline according to claim 3, characterized in that: The secondary processing mechanism includes: a dilution dish (11), the dilution dish (11) being fixedly connected to the housing (2), the dilution dish (11) being arranged below the mixing drum (7), and the discharge valve (10) being arranged above the dilution dish (11); A second discharge port (12), the second discharge port (12) is opened below the dilution dish (11), and a second discharge valve (13) is fixedly connected to the second discharge port (12); A second stirring paddle (14), wherein the second stirring paddle (14) is rotatably arranged at the bottom of the stirring drum (7), and the second stirring paddle (14) extends into the dilution dish (11).

5. The laser particle size analyzer with anti-blocking inner pipeline according to claim 4, characterized in that: The second stirring paddle (14) passes through the stirring drum (7), and one end of the first stirring paddle (6) close to the stirring drum (7) can be connected to the second stirring paddle (14), and the first stirring paddle (6) and the second stirring paddle (14) are detachably connected.

6. The laser particle size analyzer with anti-blocking inner pipeline according to claim 5, characterized in that: The water inlet of the water pump 1 (15) is connected to the discharge valve 2 (13).

7. The laser particle size analyzer with anti-blocking inner pipeline according to claim 6, characterized in that: The liquid replacement mechanism also includes: a diluent tank (18), the diluent tank (18) being fixedly connected to the housing (2); A drainage bin (19), the drainage bin (19) being fixedly connected to the housing (2), and the drainage pipe (17) being connected to the bottom of the drainage bin (19); Water pump 2 (20), the water inlet of the water pump 2 (20) is connected to the dilution liquid tank (18), and the water outlet of the water pump 2 (20) is connected to an addition pipe, and the addition pipe is arranged above the dilution dish (11).

8. The laser particle size analyzer with anti-blocking inner pipeline according to claim 7, characterized in that: The liquid supply pipe (16) is connected to the diversion channel (25), and the liquid discharge pipe (17) is connected to the detection channel (26).

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