Laser particle size analyzer with anti-blocking inner pipeline

Abstract

The invention relates to the technical field of laser particle size analyzers, one embodiment of the invention provides a laser particle size analyzer with an anti-blocking inner pipeline, the laser particle size analyzer comprises an analysis device, a shell, a sample treatment mechanism, a secondary treatment mechanism and a liquid changing mechanism, the sample treatment mechanism is used for diluting and mixing a sample, and the secondary treatment mechanism is used for treating the sample; the secondary treatment mechanism is arranged below the sample treatment mechanism, the secondary treatment mechanism is used for carrying out secondary dilution and mixing treatment on a sample in the sample treatment mechanism, the liquid changing mechanism is connected with the secondary treatment mechanism, the liquid changing mechanism is connected with a sample pool mechanism, and the liquid changing mechanism is used for conveying the sample in the secondary treatment mechanism into the sample pool mechanism; the sample pool mechanism is used for guiding a sample into the analysis equipment for analysis, and through the technical scheme, the technical problem that an internal pipeline in a laser particle size analyzer in the related technology / the prior art is likely to be blocked is solved.

Description

Technical Field

[0001] 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 function for internal pipelines. 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 laser source, sample pool, detector and other parts. The laser source scatters the sample in the sample pool, 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 pool in the analyzer. The laser source in the analyzer irradiates the liquid sample through the lens on the sample pool for analysis to 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. 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, affecting the efficiency of sample analysis. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the embodiments of the present disclosure provide a laser particle size analyzer with anti-blocking inner pipeline, which solves the technical problem in the prior art that the inner pipeline in the laser particle size analyzer is likely to be blocked.

[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 replacement mechanism, wherein the shell is fixedly connected to a 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 replacement mechanism is arranged in the shell, the liquid replacement mechanism is connected to the secondary processing mechanism, the liquid replacement mechanism is connected to a sample pool mechanism, the liquid replacement 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 samples.

[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 stirring drum, the first discharge valve is arranged above the dilution dish, the second discharge port is opened below the dilution dish, the second discharge port is fixedly connected with the second discharge valve, the second stirring paddle is rotatably arranged at the bottom of the stirring drum, the second stirring paddle extends into the dilution dish, the second stirring paddle passes through the stirring drum, the end of the first stirring paddle close to the stirring drum can be connected to the second stirring paddle, and the first stirring paddle is detachably connected to the second stirring paddle.

[0009] The liquid changing mechanism comprises a water pump 1, a liquid supply pipe, a liquid discharge pipe, a dilution liquid bin, a liquid discharge bin and a water pump 2, wherein the water pump 1 is fixedly mounted on the shell, the water inlet of the water pump 1 is communicated with the discharge valve 2, the liquid supply pipe is communicated with the drain outlet of the water pump 1, the liquid supply pipe is communicated with the sample pool mechanism, the liquid discharge pipe is fixedly connected to the shell, the liquid discharge pipe is communicated with the sample pool mechanism, the liquid changing mechanism further comprises: the dilution liquid bin is fixedly connected to the shell, the liquid discharge bin is fixedly connected to the shell, the liquid discharge pipe is communicated with the bottom of the liquid discharge bin, the water inlet on the water pump 2 is communicated with the dilution liquid bin, 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, a sample slot plate 1, a sample slot plate 2 and a clamping clamp. The sample pool slot is opened on the analysis device. 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 set 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 sheet; the guide channel is opened on the sample slot plate 1, 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, the steering wheel is arranged at the connection between the guide channel and the detection channel, the lens sheet can be detachably arranged on both the sample slot plate 1 and the sample slot plate 2, the lens sheet 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: 1. In the present invention, by providing a dilution dish and a diluent bin, the sample is diluted and mixed once in the stirring drum. When it is detected that the particle concentration in the sample solution is high, the discharge valve 2 is opened to discharge the dilution in the dilution bin into the dilution dish. The discharge valve 1 is opened to discharge the sample in the stirring drum into the dilution dish through the discharge port 1. The stirring paddle 1 drives the stirring paddle 2 to rotate. The stirring paddle 2 stirs and mixes the sample and the dilution solution in the dilution dish to obtain a further diluted sample solution. 2. In the present invention, by providing a flow guide channel and a detection channel, the flow velocity of the sample solution is reduced during the flow process, and 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 and does not flow; 3. In the present invention, by setting up a secondary processing mechanism, the sample solution can be diluted twice when the concentration of particles in the sample solution is high, the particle concentration is lower, and the risk of blockage is reduced. By setting up 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, reduce the precipitation of particles, and at the same time, the solution flow rate is reduced to facilitate accurate detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the contents of the exemplary embodiments of the present disclosure and these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention from another perspective; Figure 3 It is a schematic diagram of a partial internal cross-sectional structure of a shell in the present invention; Figure 4 It is a schematic diagram of the internal cross-sectional structure of the shell and the sample pool mechanism in the present invention; Figure 5 It is a schematic diagram of the partial internal cross-sectional structure of the mixing drum and the dilution dish in the present invention; Figure 6 It is a structural schematic diagram of the sample pool mechanism in the present invention; Figure 7 It is a schematic diagram of the internal cross-sectional structure of the sample slot plate 1 in the present invention.

[0015] In the figure: 1. analysis equipment; 2. housing; 3. lifting frame; 4. stirring frame; 5. motor; 6. stirring paddle 1; 7. stirring drum; 8. filter plate; 9. discharge port 1; 10. discharge valve 1; 11. dilution dish; 12. discharge port 2; 13. discharge valve 2; 14. stirring paddle 2; 15. water pump 1; 16. liquid supply pipe; 17. liquid discharge pipe; 18. dilution liquid tank; 19. liquid discharge tank; 20. water pump 2; 21. sample pool slot; 22. sample slot plate 1; 23. sample slot plate 2; 24. clamping clamp; 25. diversion channel; 26. detection channel; 27. steering wheel; 28. lens sheet. DETAILED DESCRIPTION

[0016] The present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0017] In order to simplify the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0018] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0019] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0020] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0021] 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.

[0022] like Figure 1 to Figure 7As 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 replacement mechanism, the shell 2 is fixedly connected to the side of the analysis device 1, 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 replacement mechanism is arranged in the shell 2, the liquid replacement mechanism is connected to the secondary processing mechanism, the liquid replacement mechanism is connected to a sample pool mechanism, the liquid replacement 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.

[0023] like Figure 1~Figure 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 arranged 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 arranged on the shell 2, the stirring paddle 6 can extend 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 arranged inside the stirring drum 7, and the discharge port 9 is opened in the stirring drum 7. At the bottom of the mixing drum 7, a discharge port 9 is fixedly connected with 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 the excessively large 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, so as to facilitate the cleaning of the inside of the mixing drum 7. After filtering the large particles in the sample, the large particles can be prevented from being blocked in the sample pool mechanism. Since the filter plate 8 is detachable, it is convenient to clean.

[0024] like Figure 4~Figure 5As shown, the secondary processing mechanism includes a dilution dish 11, a discharge port 12 and a stirring paddle 14. The dilution dish 11 is fixedly connected to the housing 2, the dilution dish 11 is arranged below the mixing drum 7, the discharge valve 10 is arranged above the dilution dish 11, the discharge port 12 is opened below the dilution dish 11, and the discharge valve 13 is fixedly connected to the discharge port 12. The stirring paddle 14 is rotatably arranged at the bottom of the mixing drum 7, the stirring paddle 14 extends into the dilution dish 11, the stirring paddle 14 penetrates the mixing drum 7, the end of the stirring paddle 6 close to the mixing drum 7 can be connected to the stirring paddle 14, the stirring paddle 6 and the stirring paddle 14 are detachably connected, the dilution dish 11 is arranged below the mixing drum 7, and when the detection 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 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 6 drives the stirring paddle 14 to rotate, and the stirring paddle 14 stirs and mixes the sample and the dilution solution in the dilution dish 11. When the stirring is completed, the discharge valve 13 is opened, and the liquid in the dilution dish 11 is transported to the water pump 15 through the discharge port 12, and then transported to the sample slot plate 22 through the water pump 15. The liquid after the detection is completed is transported to the drainage bin 19 through the drainage pipe 17. By regulating the secondary dilution, the number of particles entering the liquid in the sample slot plate 22 can be reduced, and the risk of clogging can be reduced.

[0025] like Figure 4~Figure 5 As shown, the liquid replacement mechanism includes a water pump 15, a liquid supply pipe 16, a drain pipe 17, a dilution liquid bin 18, a drain bin 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 replacement mechanism also includes a dilution liquid bin 18 fixedly connected in the shell 2, the drain bin 19 is fixedly connected in the shell 2, the drain pipe 17 is connected to the bottom of the drain bin 19, the water inlet on the water pump 20 is connected to the dilution liquid bin 18, and the water outlet of the water pump 20 is connected with an addition pipe, and the addition pipe is arranged above the dilution dish 11.

[0026] like Figure 6~Figure 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 sheet 28.

[0027] like Figure 6~Figure 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 sheet 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 arranged on the sample slot plate 1 22. The steering wheel 27 is arranged at the connection between the guide channel 25 and the detection channel 26. The lens sheet 28 is detachably arranged on the sample slot plate 1 22 and the sample slot plate 2 23. The lens sheet 28 is arranged at the central position of the detection channel 26. The liquid supply pipe 16 is connected to the guide channel 25, the liquid discharge 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 flow diversion 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 flow diversion 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 flow diversion 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 flow diversion 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 sheet 28.

[0028] In the present invention, the sample and the dilution solvent are added to the mixing drum 7, 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 the sample solution passes through the filter plate 8 to filter 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 slot plate 1 22 through the liquid supply pipe 16 through the water pump 15, and the sample solution impacts the steering wheel 27 through the guide channel 25 to rotate and enter the In the detection channel 26, when the sample solution passes through the lens sheet 28, the laser source and the detector in the analysis device 1 perform detection and analysis. When it is detected that there are too many particles in the sample solution, the discharge valve 13 is closed, the discharge valve 10 is opened to release the sample solution into the dilution dish 11, the water pump 20 transports the dilution liquid in the dilution liquid tank 18 to the dilution dish 11, and the stirring paddle 14 mixes the sample solution and the dilution liquid. When the mixing is completed, the discharge valve 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.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure rather than to limit it. 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, which 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 the sample processing mechanism being used to perform 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 arranged on the analysis device (1), and the sample pool mechanism is used to introduce a sample into the analysis device (1) for analysis.

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 shell (2); A stirring frame (4), the stirring frame (4) being slidably connected to the lifting frame (3); A motor (5), wherein the motor (5) is fixedly arranged on the stirring frame (4); A stirring paddle 1 (6), wherein the stirring paddle 1 (6) is fixedly connected to an output end of the motor (5); A stirring assembly, wherein the stirring assembly is fixedly arranged on the housing (2), the stirring paddle 1 (6) can extend into the stirring assembly, and 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 shell (2); A filter plate (8), wherein a plurality of the filter plates (8) are provided, and the plurality of filter plates (8) are detachably arranged inside the mixing drum (7); A discharge port 1 (9), wherein the discharge port 1 (9) is opened at the bottom of the mixing drum (7), and a discharge valve 1 (10) is fixedly connected to the discharge port 1 (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 1 (10) being arranged above the dilution dish (11); A second discharge port (12), the second discharge port (12) being disposed below the dilution dish (11), and a second discharge valve (13) being fixedly connected to the second discharge port (12); A second stirring paddle (14), wherein the second stirring paddle (14) is rotatably disposed 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 liquid replacement mechanism comprises: A water pump (15), wherein the water pump (15) is fixedly mounted on the housing (2), and a water inlet of the water pump (15) is connected to the discharge valve (13); A liquid supply pipe (16), the liquid supply pipe (16) being connected to a drain outlet of the water pump (15), and the liquid supply pipe (16) being connected to the sample pool mechanism; A liquid discharge pipe (17), wherein the liquid discharge pipe (17) is fixedly connected to the housing (2), and the liquid discharge pipe (17) is in communication with the sample pool mechanism.

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 in the housing (2); A liquid drainage bin (19), the liquid drainage bin (19) being fixedly connected to the housing (2), and the liquid drainage pipe (17) being in communication with the bottom of the liquid drainage bin (19); A water pump (20) having a water inlet connected to the diluent bin (18), and a water outlet connected to the water pump (20) having an addition pipe disposed above the dilution dish (11).

8. The laser particle size analyzer with anti-blocking inner pipeline according to claim 7, characterized in that: The sample pool mechanism comprises: A sample pool slot (21), wherein the sample pool slot (21) is provided on the analysis device (1); A sample slot plate one (22), wherein the sample slot plate one (22) is detachably arranged 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 one (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 first sample slot plate (22) and the second sample slot plate (23), and the clamping clamp (24) is detachably connected to the sample pool slot (21).

9. The laser particle size analyzer with anti-blocking inner pipeline according to claim 8, characterized in that: 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 flow guide channel (25) is connected to the detection channel (26); A steering wheel (27), the steering wheel (27) being rotatably disposed on the sample slot plate 1 (22), the steering wheel (27) being disposed at the connection between the flow guide channel (25) and the detection channel (26); A lens sheet (28) is detachably provided on the sample slot plate 1 (22) and the sample slot plate 2 (23), and the lens sheet (28) is provided at the central position of the detection channel (26).

10. The laser particle size analyzer with anti-blocking inner pipeline according to claim 9, characterized in that: The liquid supply pipe (16) is in communication with the flow guide channel (25), and the liquid discharge pipe (17) is in communication with the detection channel (26).

Images