Detection device and usage method for aggregate mud content or particle content below 0.075 mm

Abstract

The present invention discloses a detection device for the mud content of aggregate or the content of particles below 0.075 mm and a method for use. The detection device includes a barrel-shaped detection device body, a balance, a filter assembly, a stirring mechanism, a drying mechanism and a control box. The filter assembly is used to filter particles of different particle sizes, the stirring mechanism is used to fully stir the mixture of the sample and water, and the drying mechanism is used to evaporate the moisture in the detection device. The present invention can simulate the effect of manual washing by providing a step of standing the mixture and ultrasonically cleaning the aggregate with an ultrasonic generator, fully separating fine particles on the aggregate and reducing the burden of manual labor. The entire process is closer to the standard detection process and has higher detection accuracy. The present invention relates to the field of engineering construction technology.

Description

Technical Field

[0001] The present invention relates to a device and a method for detecting the mud content of aggregate or the content of particles below 0.075 mm in the technical field of engineering construction. Background Art

[0002] Aggregate, also known as aggregate, is one of the main components of cement concrete, inorganic binder stabilized materials, or asphalt concrete. It plays an important role in the mixture and determines the various physical and mechanical properties of the mixture. It can be divided into coarse aggregate and fine aggregate according to particle size. The particle size of coarse aggregate is generally not less than 4.75mm, and the particle size of fine aggregate is generally less than 4.75mm.

[0003] In concrete mix design or production, the particle content or mud content less than 0.075mm is one of the important indicators of aggregate quality. Aggregates with too high a content shall not be used in concrete mix design or production to avoid damage to the physical and mechanical properties of the material. Therefore, before construction, the aggregate particle content must first be tested to obtain qualified engineering materials. At present, the detection process for the content of particles with a particle size of less than 0.075mm in aggregate is divided into the following steps: 1. Weigh the sample after drying it; 2. Place it in a container and soak it in water for 24 hours; 3. Manually wash the particles by hand to separate the particles from the aggregate itself, suspend them in water, and slowly pour the suspension into 2.36mm, 1.18mm and 0.075mm sieves in turn, and filter; 4. Repeat step 3 until the washed water is clear; 5. Rinse the fine particles remaining on the sieve with water to fully wash away particles smaller than 0.075mm; 6. Place it in a 105℃±5℃ oven and dry it to constant weight, then take it out and cool it to room temperature, and weigh the sample mass; 7. The mass difference and the percentage of the drying mass before the test are the results.

[0004] However, the aggregate required for large-scale construction projects typically measures in the hundreds of thousands of cubic meters. Even random sampling is a significant amount, and manual testing is labor-intensive. Currently available mud content testing machines typically perform only simple stirring, filtering, and drying of the sample before weighing and testing. Without sufficient water immersion and washing, fine particles cannot be fully separated from the aggregate itself, failing to adhere to standard testing procedures. This leads to significant deviations in test results and makes them unreliable. Furthermore, the entire process cannot be fully automated. Either manual washing is replaced by machine washing alone, followed by manual collection of aggregates and subsequent drying and weighing operations; or additional air drying ovens or conveyor belts are required to achieve maximum automation and eliminate manual handling. However, fully automated testing is still not possible, and the required test site and equipment are bulky. Summary of the Invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a detection device and method for detecting the mud content of aggregate or the content of particles below 0.075 mm, which can improve the detection accuracy of the aggregate particle content and at the same time greatly reduce the manual labor of the detection personnel by automatically conducting the test.

[0006] According to a first embodiment of the present invention, there is provided a device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm, comprising:

[0007] The detection device body is barrel-shaped, with a water inlet and a material inlet on its side wall and a drain outlet at the bottom;

[0008] a balance mounted on the bottom of the detection device body;

[0009] A filter assembly comprising an isolation disc, a water stop valve, and a sieve set, wherein the isolation disc is installed in the detection device body and divides the internal space of the detection device body into a stirring space and a filtering space, the isolation disc is provided with a drain hole, the drain hole is provided with a screen, the water stop valve is installed at the drain hole, the sieve set is provided in the filtering space and further divides the filtering space, and the mesh size of the sieve set is within 0.075 mm;

[0010] a stirring mechanism comprising a first motor, a stirring rod and an ultrasonic generator, wherein the stirring rod and the ultrasonic generator are both connected to an output shaft of the first motor and are capable of rotating in the stirring space;

[0011] A drying mechanism is provided in the detection device body, the drying mechanism comprising a hair dryer, a temperature sensor and a resistance wire, the resistance wire is provided at the air outlet of the hair dryer, and the temperature sensor is mounted on the inner wall of the detection device body;

[0012] A control box is provided, wherein the balance, the water stop valve, the stirring mechanism and the drying mechanism are all electrically connected to the control box.

[0013] According to an embodiment of the first aspect of the present invention, further, the detection device body includes a sleeve and a base, the sleeve is sleeve-connected to the base, the sleeve can move up and down, and the stirring mechanism is installed on the sleeve.

[0014] According to the embodiment of the first aspect of the present invention, further, the detection device for the mud content of aggregate or the content of particles below 0.075 mm also includes a fixed frame and a push rod mechanism, the fixed frame is used to be fixed to the ground, the push rod mechanism is installed on the fixed frame, the output end of the push rod mechanism is connected to the sleeve, and the push rod mechanism is used to drive the sleeve to move up and down; the push rod mechanism is electrically connected to the control box.

[0015] According to an embodiment of the first aspect of the present invention, further, the push rod mechanism includes a second motor, a screw and a screw seat, the screw seat is adaptively connected to the screw, the second motor drives the screw to rotate, and the screw seat is connected to the sleeve.

[0016] According to an embodiment of the first aspect of the present invention, further, the water inlet is externally connected to a pressure regulating pump, the pressure regulating pump is used to adjust the inlet water pressure, and the pressure regulating pump is electrically connected to the control box.

[0017] According to an embodiment of the first aspect of the present invention, further, there are multiple stirring rods, and the multiple stirring rods are interconnected to form a radial structure.

[0018] According to an embodiment of the first aspect of the present invention, further, the isolation disc is provided with a side baffle, and the upper edge of the side baffle is expanded outward and provided with a waterproof material coating.

[0019] According to an embodiment of the first aspect of the present invention, further, the bottom surface of the isolation disk is a conical surface, and the number of the drainage holes is multiple, and the multiple drainage holes are respectively arranged on the edge of the bottom surface of the isolation disk.

[0020] According to an embodiment of the first aspect of the present invention, further, the mesh size of the sieve is 4.75 mm.

[0021] According to a second aspect of the present invention, there is provided a method for using a device for detecting aggregate mud content or content of particles smaller than 0.075 mm, comprising:

[0022] Installing the sieve set and the isolation disc into the detection device body and zeroing the balance;

[0023] Pour the sample from the feed port and record the reading m0 of the balance at this time;

[0024] Inject water from the water inlet so that the mixture of water and the sample submerges the stirring rod and the ultrasonic generator, and let it stand for 2 to 24 hours according to the selected test specification;

[0025] turning on the first motor and the ultrasonic generator to stir the mixture;

[0026] After the stirring is completed, the water stop valve is opened, and water flows from the stirring space into the filtering space. The set screen filters the inflowing water, and the water flows out from the drain port;

[0027] When the reading of the balance does not change by more than 5g within 1 minute, turn on the resistance wire and the hair dryer to dry the internal space of the detection device body and maintain the temperature at 105±5°C;

[0028] Read the balance reading every 3 hours. If the change does not exceed 0.1%, it can be considered that the drying is complete. Turn off the resistance wire and continue to turn on the hair dryer until the internal space of the detection device body cools to room temperature.

[0029] The balance reading m1 is read, and the particle content of the sample is obtained according to the formula ω=((m0-m1) / m0)*100%.

[0030] The beneficial effects of the embodiments of the present invention include at least: by setting a step of standing the mixture and ultrasonically cleaning the aggregate through an ultrasonic generator, the present invention can simulate the effect of manual washing, fully separate the fine particles on the aggregate, and reduce the burden of manual labor; the entire process is closer to the standard detection process and has higher detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described only illustrate some embodiments of the present invention, not all of them. Those skilled in the art can derive other design solutions and drawings based on these drawings without inventive effort.

[0032] Figure 1 is a structural diagram of an embodiment of the first aspect of the present invention;

[0033] Figure 2 is a schematic diagram of the embodiment of the first aspect of the present invention when the sleeve and the base are separated;

[0034] Figure 3 It is a structural diagram of the isolation disk in the embodiment of the first aspect of the present invention. DETAILED DESCRIPTION

[0035] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention 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 present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, 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. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense. Connection relationships include direct connection relationships and indirect connection relationships. Technical personnel 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.

[0039] Reference Figures 1 and 2 The detection device for the mud content of aggregate or the content of particles below 0.075 mm in the embodiment of the first aspect of the present invention comprises a detection device body 1, a balance 2, a filter assembly 3, a stirring mechanism 4, a drying mechanism 5 and a control box 6. The detection device body 1 is barrel-shaped, and its inner cavity is a detection space for loading samples and performing detection work. A water inlet 11 and a material inlet 12 are provided on the side wall of the detection device body 1, which are used to inject water and place the sample to be tested respectively; a drain port 13 is provided at the bottom of the detection device body 1, which is used to discharge the suspension of particles with a particle size of less than 0.075 mm contained in the sample, and in order to improve the drainage efficiency of the drain port 13, an inclined surface is provided at the bottom of the detection device body 1 to guide the water to the drain port 13 for discharge.

[0040] The balance 2 is installed at the bottom of the detection device body 1 and is used to measure the change in sample mass.

[0041] The filter assembly 3 includes an isolation disc 31, a water stop valve 32, and a sieve 33, which is used to filter particles with a diameter of less than 0.075 mm in the aggregate. Specifically, the isolation disc 31 is installed in the detection device body 1 and its internal space is divided into a stirring space 14 and a filtering space 15, wherein the stirring space 14 is an area for stirring the sample, and the filtering space 15 is an area for filtering and separating the mixture of water and sample. Figure 3A drainage hole 311 is provided on the isolation disk 31, and a screen 34 is provided at the drainage hole 311. The mesh aperture of the screen 34 is specifically 4.75 mm, which can retain coarse aggregates with a particle size greater than 4.75 mm on the isolation disk 31, while fine aggregates with a particle size less than 4.75 mm enter the filtration space 15 with the water flow. A water stop valve 32 is also provided at the drainage hole 311 to control the connection between the stirring space 14 and the filtration space 15. The sieve 33 is arranged in the filtration space 15 for further screening the fine aggregate, and its edge is provided with a waterproof material coating, specifically a coating that can prevent water leakage, such as a rubber coating, to prevent particles with a particle size less than 0.075 mm from overflowing with the water flow, causing inaccurate experimental results. The mesh aperture of the sieve 33 is specifically 0.075 mm. Alternatively, multiple sets of sieves 33 can be used for graded screening. Depending on the specifications, a 4.75mm, 2.36mm, or 1.18mm sieve can be combined with a 0.075mm sieve to improve screening accuracy and prevent larger particles from damaging the finer mesh. Water and particles suspended in the water with a size smaller than 0.075mm will flow out of the drain 13.

[0042] The stirring mechanism 4 includes a first motor 41, a stirring rod 42 and an ultrasonic generator 43. The stirring rod 42 and the ultrasonic generator 43 are both connected to the output shaft of the first motor 41 and can rotate in the stirring space 14 to stir. Specifically, the first motor 41 can also be connected to the stirring rod 42 through a gear set or a belt drive structure to change the rotation speed or torque. The stirring rod 42 is specifically a rubber rod to prevent damage to the corners of the aggregate or itself, thereby affecting the test results. The number of stirring rods 42 is multiple, and multiple stirring rods 42 are interconnected and form a radial structure. The center of their shape is connected to the output shaft of the first motor 41 or the output shaft of the transmission mechanism, which can increase the contact area between the stirring rod 42 and the sample mixture and improve the stirring efficiency. An ultrasonic generator 43 is provided above the stirring rod 42. The bubbles generated by its ultrasound burst on the surface of the aggregate. The energy generated can promote the removal of impurities and dust that are not firmly bonded to the aggregate, achieving an effect similar to manual washing.

[0043] The drying mechanism 5 is disposed within the detection device body 1 and is used to evaporate the moisture within the detection device body 1. The drying mechanism 5 includes a blower 51, a temperature sensor 52, and a resistance wire 53. The resistance wire 53 is disposed at the air outlet of the blower 51, and the temperature sensor 52 is mounted on the inner wall of the detection device body 1 to monitor the internal temperature.

[0044] The balance 2 , the water stop valve 32 , the stirring mechanism 4 and the drying mechanism 5 are all electrically connected to the control box 6 , and the detection process can be centrally controlled and monitored by the control box 6 .

[0045] Furthermore, the detection device body 1 includes a sleeve 16 and a base 17. The sleeve 16 and base 17 are nested and connected, allowing the sleeve 16 to move up and down relative to the base 17. The stirring mechanism 4 is mounted below the sleeve 16. This allows the sleeve 16 to control the height of a stirring rod 42 as it moves up and down. The stirring rod 42 is located below the sample, stirring the sample mixture thoroughly. At the end of the test, the stirring rod 42 is lifted up and away from the sample, allowing the sample to be collected for subsequent testing. To control the travel of the sleeve 16, a displacement sensor 10 can be provided to monitor the relative position of the sleeve 16 and base 17. The displacement sensor 10 is electrically connected to the control box 6. Furthermore, the lateral baffles of the sleeve 16 prevent liquid from splashing during stirring, reducing detection errors. In some embodiments, an isolation disc 31 and a sieve 33 are placed within the base 17 to filter and screen the aggregate. In other embodiments, the isolation disc 31 and sieve 33 can be directly combined into the base 17 and placed on the balance 2, achieving modular assembly.

[0046] Furthermore, the detection device for the mud content of aggregate or the content of particles below 0.075 mm also includes a fixed frame 7 and a push rod mechanism 8. The fixed frame 7 is fixed to the ground, the push rod mechanism 8 is fixedly connected to the fixed frame 7, and the output end of the push rod mechanism 8 is connected to the sleeve 16, so that the push rod mechanism 8 can drive the sleeve 16 to move up and down, and the push rod mechanism 8 is also electrically connected to the control box 6.

[0047] Furthermore, the push rod mechanism 8 includes a second motor 81, a screw 82, and a screw seat 83. The screw seat 83 is adapted to be connected to the screw 82. The second motor 81 drives the screw 82 to rotate, and the screw seat 83 is connected to the sleeve 16. Therefore, when the second motor 81 is started, the screw seat 83 is driven by the screw 82, which in turn drives the sleeve 16 up and down. The use of a screw mechanism helps improve movement accuracy, and the screw mechanism has a self-locking function, which reduces the driving burden of the second motor 81.

[0048] Furthermore, a pressure regulating pump 9 is externally connected to the water inlet 11, which is used to adjust the water pressure of the water and is also electrically connected to the control box 6. The pressure regulating pump 9 can not only control the opening and closing of the water injection, but also control the water pressure of the water inlet. It can spray water onto the stirring rod 42 and the ultrasonic generator 43, thereby removing the residual aggregate particles thereon and reducing the inaccurate test results caused by the residual aggregate particles.

[0049] Furthermore, the isolation disc 31 is provided with a side baffle 312, the upper edge of the side baffle 312 is expanded outwards and is trumpet-shaped for entering with the guide sleeve 16. The upper edge of the side baffle 312 is provided with a waterproof material coating to prevent water leakage.

[0050] Furthermore, the bottom surface of the isolation tray 31 is conical, with a high center and low edges. This allows the sample and water mixture to concentrate at the edges due to gravity, further facilitating the separation of particles larger than 4.75 mm from those smaller than 4.75 mm. The sample mixture is directed to the edge of the isolation tray 31. Multiple drainage holes 311 are provided along the bottom edge of the isolation tray 31, allowing water to drain simultaneously through these holes, accelerating drainage.

[0051] The method for using the device for detecting the mud content of aggregate or the content of particles less than 0.075 mm in the embodiment of the second aspect of the present invention comprises the following steps:

[0052] S1. Assemble the sieve 33 and isolation disc 31 and install them on the detection device body 1 connected to the balance. Zero the balance 2. Using the control box 6, control the stirring rod 42 to move downward to an appropriate position on the isolation disc 31. This distance is just enough to slightly squeeze the isolation disc 31. This also prevents the injected water and small particles suspended therein from escaping, which could result in a low test result.

[0053] S2. Pour the sample from the feed port 12 and record the reading m0 of the balance 2 at this time;

[0054] S3. Water is injected from the water inlet 11. At this time, the water stop valve 32 is closed and no water flows into the filter space 15, so that the mixture of water and sample submerges the stirring rod 42 and the ultrasonic generator 43, and is allowed to stand for 2 to 24 hours in accordance with relevant specifications.

[0055] S4. Turn on the first motor 41 and the ultrasonic generator 43 to stir the mixture; the first motor 41 rotates forward for 1min, then reverses for 1min, and the cycle is repeated 10 times;

[0056] S5. After stirring is completed, open the water stop valve 32, water flows from the stirring space 14 into the filter space 15, and water can continue to be injected to rinse the impurities remaining on the stirring rod 42 and the ultrasonic generator 43, and the sieve 33 filters the inflowing water, and finally the water flows out from the drain 13;

[0057] S6. When the reading of the balance 2 changes by no more than 5g within 1min, it is considered that most of the water has been drained. Turn on the resistance wire 53 and the hair dryer 51 to dry the internal space of the detection device body 1 and maintain the temperature at 105±5℃.

[0058] S7. Read the balance reading every 3h. If the change does not exceed 0.1%, it can be considered that the drying is complete. Turn off the resistance wire 53 and continue to turn on the hair dryer 51 to cool down until the internal space of the detection device body 1 drops to room temperature.

[0059] S8. Read the stable reading m1 of the balance 2 and obtain the content of the 0.075 mm sample particles according to the formula ω=((m0-m1) / m0)*100%.

[0060] In this application, the relevant specifications refer to the "Test Procedure for Aggregates for Highway Engineering" (JTG E42-2005), "Construction Stone" (GB / T14685-2011), "Construction Sand" (GB / T 14684-2011), and "Standard for Quality and Test Methods of Sand and Stone for Ordinary Concrete" (JGJ 52-2006).

[0061] The above is a specific description of the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A device for detecting the mud content of aggregate or the content of particles below 0.075 mm, characterized in that: include: The detection device body (1) is barrel-shaped, with a water inlet (11) and a material inlet (12) provided on its side wall, and a drain outlet (13) provided on its bottom; A balance (2) mounted on the bottom of the detection device body (1); A filter assembly (3), comprising an isolation disc (31), a water stop valve (32) and a sieve (33); the isolation disc (31) is installed in the detection device body (1) and divides the internal space of the detection device body (1) into a stirring space (14) and a filtering space (15); the isolation disc (31) is provided with a water drain hole (311), a screen (34) is provided at the water drain hole (311), the water stop valve (32) is installed at the water drain hole (311), the sieve (33) is arranged in the filtering space (15) and further divides the filtering space (15); the mesh size of the sieve (33) is 0.075 mm; a stirring mechanism (4), comprising a first motor (41), a stirring rod (42) and an ultrasonic generator (43), wherein the stirring rod (42) and the ultrasonic generator (43) are both connected to the output shaft of the first motor (41) and are capable of rotating in the stirring space (14); a drying mechanism (5) disposed in the detection device body (1), the drying mechanism (5) comprising a blower (51), a temperature sensor (52) and a resistance wire (53), the resistance wire (53) being disposed at the air outlet of the blower (51), and the temperature sensor (52) being mounted on the inner wall of the detection device body (1); A control box (6), the balance (2), the water stop valve (32), the stirring mechanism (4) and the drying mechanism (5) are all electrically connected to the control box (6); The bottom surface of the isolation disk (31) is a conical surface, and the number of the drainage holes (311) is multiple, and the multiple drainage holes (311) are respectively arranged on the edge of the bottom surface of the isolation disk (31); when stirring is completed, the water stop valve (32) is opened to allow water to flow from the stirring space (14) into the filtering space (15), the sieve (33) is used to filter the inflowing water, and the drain port (13) can allow water to flow out; The water inlet (11) is externally connected to a pressure regulating pump (9), the pressure regulating pump (9) is used to adjust the water pressure of the inlet water, and the pressure regulating pump (9) is electrically connected to the control box (6); The set of screens may have meshes of various diameters, and the plurality of set of screens may be arranged in order from large to small mesh diameters to form a set of screens.

2. The device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm according to claim 1, characterized in that: The detection device body (1) comprises a sleeve (16) and a base (17); the sleeve (16) is sleeve-connected to the base (17); the sleeve (16) can move up and down; and the stirring mechanism (4) is installed on the sleeve (16).

3. The device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm according to claim 2, characterized in that: The device for detecting the mud content of aggregate or the content of particles below 0.075 mm also includes a fixed frame (7) and a push rod mechanism (8), wherein the fixed frame (7) is used to be fixed to the ground, the push rod mechanism (8) is installed on the fixed frame (7), the output end of the push rod mechanism (8) is connected to the sleeve (16), and the push rod mechanism (8) is used to drive the sleeve (16) to move up and down; the push rod mechanism (8) is electrically connected to the control box (6).

4. The device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm according to claim 3, characterized in that: The push rod mechanism (8) comprises a second motor (81), a screw rod (82) and a screw rod seat (83); the screw rod seat (83) is adaptively connected to the screw rod (82); the second motor (81) drives the screw rod (82) to rotate; and the screw rod seat (83) is connected to the sleeve (16).

5. The device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm according to claim 1, characterized in that: There are multiple stirring rods (42), and the multiple stirring rods (42) are connected to each other to form a radial structure.

6. The device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm according to claim 1, characterized in that: The isolation disc (31) is provided with a side baffle (312), and the upper edge of the side baffle (312) is expanded outward and provided with a waterproof material coating.

7. The device for detecting the mud content of aggregate or the content of particles smaller than 0.075 mm according to claim 1, characterized in that: The mesh size of the sieve (34) is 4.75 mm.

8. A method for using a device for detecting aggregate mud content or particle content below 0.075 mm, using the device for detecting aggregate mud content or particle content below 0.075 mm according to any one of claims 1 to 7, characterized in that: include: Installing the sieve (33) and the isolation disc (31) into the detection device body (1), and zeroing the balance (2); Pour the sample into the feed port (12) and record the reading m0 of the balance (2) at this time; Inject water from the water inlet (11) so that the mixture of water and the sample submerges the stirring rod (42) and the ultrasonic generator (43), and let it stand for 2 to 24 hours according to the selected test specification; Turning on the first motor (41) and the ultrasonic generator (43) to stir the mixture; After the stirring is completed, the pressure regulating pump (9) is turned on to control the water pressure of the water inlet and spray the water onto the stirring rod (42) and the ultrasonic generator (43), thereby removing the aggregate particles remaining on the stirring rod (42) and the ultrasonic generator (43). The water stop valve (32) is opened, and the water flows from the stirring space (14) into the filtering space (15). The set screen (33) filters the inflowing water, and the water flows out from the drain port (13); When the reading of the balance (2) changes by no more than 5g within 1 minute, the resistance wire (53) and the hair dryer (51) are turned on to dry the internal space of the detection device body (1) and maintain the temperature at 105±5°C; The balance (2) is read every 3 hours. If the change does not exceed 0.1%, it is considered that the drying is complete. The resistance wire (53) is turned off and the hair dryer (51) is turned on again until the internal space of the detection device body (1) drops to room temperature. The reading m1 of the balance (2) is read, and the particle content of the sample is obtained according to the formula ω=((m0-m1) / m0)*100%.

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