Multifunctional crushing and dividing combined sample preparation system

Abstract

The application discloses a multifunctional crushing and classifying combined sample preparation system and relates to the technical field of sample preparation. The multifunctional crushing and classifying combined sample preparation system comprises a processing box, a first crusher arranged above the processing box, a first classifying device arranged in the processing box and a second crusher arranged in the processing box, and is characterized in that the multifunctional crushing and classifying combined sample preparation system further comprises a discharge cover fixed below discharge outlets of the first crusher and the second crusher, a pair of roller assemblies rotatably arranged in the discharge cover and a dynamic material scraping assembly arranged in the discharge cover and capable of adaptively detecting a residual material accumulation state and position and scraping the residual material at the corresponding position as required. In the application, a traditional continuous friction mode is changed into an on-demand triggering mode. While the efficiency of unblocking is not affected, the running resistance and invalid wear of the pair of roller assemblies are significantly reduced, the service life of key components is prolonged, and the energy consumption of the equipment is optimized, so that the economic efficiency and reliability of system operation are comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of sample preparation technology, specifically a multifunctional crushing and reduction combined sample preparation system. Background Technology

[0002] In modern industrial production, accurate quality testing of bulk materials such as coal, ore, metallurgical raw materials, and cement raw and clinker is a crucial core step. This process of scientifically obtaining small, uniform samples suitable for direct laboratory analysis from large quantities of large-particle raw materials is called sample preparation. The core technology of sample preparation is crushing and fractionation. Existing combined crushing and fractionation sample preparation systems mainly consist of a feeder, a crusher, and a fractionation mechanism. Taking coal sample preparation as an example, large pieces of coal are fed to the crusher, where they are pulverized into small particles. The fractionation mechanism then evenly divides these particles into several portions, retaining one portion as a sample for testing and discarding the rest.

[0003] In the crushing process, the feeding rollers installed at the discharge port are often used to prevent blockage and to perform secondary crushing of the material. To address the adhesion problem of undried coal samples, fixed hard scrapers are typically added to the sides of the rollers to remove residue from the grooves. These scrapers are usually fixed and have a serrated design on the sides to ensure complete and tight contact with the roller surface and grooves. This rigid scraping method with the scraper in close contact has a significant advantage in removing adhering materials from the roller surface and grooves. However, the feeding rollers generally require a large load when crushing materials, and the tight contact between the scraper and the roller surface and grooves further increases frictional resistance and operating load. Therefore, while efficient scraping is achieved, it also increases the additional wear and tear on the rollers and the operating load. Furthermore, the scraper is prone to deformation and chipping over long-term use, and it introduces additional mechanical noise into the entire multi-stage crushing system.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing multifunctional crushing and fractionation combined sample preparation system. Summary of the Invention

[0005] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a multifunctional crushing and reducing combined sample preparation system to solve the problem mentioned in the background art that the continuous pressing of the scraper will further increase the frictional resistance and operating load of the rollers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional crushing and reducing combined sample preparation system, comprising a processing box, a primary crusher disposed above the processing box, a primary reducing unit disposed inside the processing box, and a secondary crusher disposed inside the processing box, characterized in that it further comprises: The discharge hood is fixed below the discharge port of the primary crusher and the secondary crusher; the roller assembly is rotated inside the discharge hood; and the dynamic scraping assembly is installed inside the discharge hood to adaptively detect the state and position of residual material accumulation and scrape off the corresponding residual material as needed. The dynamic scraping assembly includes a fixed long rod fixed inside the discharge hood, a rotating rod rotatably sleeved on the fixed long rod, a measuring ball hinged to one end of the rotating rod, and a hard scraper movably positioned above the measuring ball.

[0007] Preferably, a feeder is provided on one side of the processing box, and the discharge port of the feeder is connected to the feed port of the primary crusher. The processing box is equipped with a primary conveyor belt located below the primary crusher, and the discharge end of the primary conveyor belt is located directly above the primary divider. The processing box is equipped with a secondary conveyor belt located below the primary divider, and the feed end of the secondary conveyor belt is aligned with one of the discharge ports of the primary divider. The processing box is equipped with a three-stage conveyor belt located below the primary divider, and the feed end of the three-stage conveyor belt is aligned with another discharge port of the primary divider.

[0008] Preferably, the secondary crusher is located below the secondary conveyor belt, and the feed inlet of the secondary crusher is aligned with the discharge end of the secondary conveyor belt; The processing box is equipped with a secondary divider located below the tertiary conveyor belt, and the inlet of the secondary divider is aligned with the outlet of the tertiary conveyor belt.

[0009] Preferably, the interior of the processing box is equipped with a five-stage conveyor belt located below the secondary crusher, and the feed end of the five-stage conveyor belt is aligned with the discharge port of the secondary crusher. The processing box is equipped with four conveyor belts inside, and the feed end of the four conveyor belts is aligned with one of the discharge ports of the two-stage divider. The discharge end of the four conveyor belts extends to the outside of the processing box.

[0010] Preferably, a three-stage divider is installed inside the processing box below the five-stage conveyor belt, and the inlet of the three-stage divider is aligned with the outlet of the five-stage conveyor belt. A PLC controller is installed on the top of the processing box.

[0011] Preferably, two sets of guide plates are symmetrically fixed at the bottom of the discharge ports of both the primary crusher and the secondary crusher, and the two sets of guide plates are located directly above each set of roller assemblies. Two sets of dust baffles are symmetrically fixed to the lower end of the inner wall of the discharge hood, and the two sets of dust baffles are located directly below each set of roller assemblies.

[0012] Preferably, the measuring balls are arranged in several groups, and each group of measuring balls corresponds to a groove of the roller assembly. The measuring ball is movably inserted into the groove of the roller assembly, and the surface of the measuring ball has been polished and lubricated. The rotating rod is provided in several groups, and the measuring ball of each group is hinged at the middle of one end of each group of rotating rods; The rotating rod is L-shaped, and the bent part of the rotating rod is rotated and sleeved on the outer surface of the fixed long rod.

[0013] Preferably, the dynamic scraping assembly further includes a torsion spring movably sleeved on the outer surface of the fixed long rod; The fixed long rod consists of a long column and several sets of abutment plates fixed proportionally to the surface of the long column; Both the rotating rod and the torsion spring are sleeved on the outer surface of the long column rod; One end of the torsion spring is pressed against one side of the abutment plate, and the other end of the torsion spring is pressed against the middle of the side wall of the rotating rod.

[0014] Preferably, a connecting rod is hinged to the other end of the rotating rod, and a push plate is hinged to the other end of the connecting rod; The push plate consists of a right-angle rod and a triangular plate fixed to one side of the right-angle rod; One end of the right-angle rod is hinged to the other end of the connecting rod; One side of the inclined surface of the triangular plate is connected to one end of the hard scraper via a wedge slide rail; The other end of the hard scraper near the roller assembly is chamfered. The hard scraper is provided in several groups, and each group of hard scrapers is located above each group of measuring balls; Several sets of hard scrapers are connected in sequence, but are not fixed to each other. The size of the other end of the hard scraper matches the outer wall size of the roller assembly.

[0015] Preferably, the inside of the discharge hood is symmetrically fixed with positioning plates, and one side of the positioning plates is provided with several sets of T-shaped grooves; The other end of the push plate slides vertically within a T-shaped groove via a T-shaped slider. Several sets of textured guide rods are slidably inserted through the surface of the positioning plate. One end of each set of textured guide rods passes through the positioning plate and is fixedly connected to the side of each set of hard scrapers.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the measuring ball adaptively detects the residual material adhering to and accumulating in the grooves of the roller assembly. The residual material pushes the ball up, causing the rotating rod to deflect and the pusher plate to move downwards. This downward movement of the pusher plate forces the hard scraper plate into the grooves of the roller assembly. As the roller assembly continues to rotate, it scrapes away the adhering residual material. Once there is very little or no residual material adhering to the roller assembly, the measuring ball returns to its position against the outer wall of the groove, the pusher plate moves upwards, and the hard scraper plate is pulled out of the groove. This invention, by deploying measuring balls on the side of each set of grooves in the roller assembly, monitors the thickness of the residual material in the grooves in real time. Only when the amount of residual material accumulated in a certain set of grooves exceeds a reasonable threshold will the hard scraper plate at the corresponding position adhere to the roller assembly to perform a pressing and scraping operation; at other times, the hard scraper plate remains detached. This invention transforms the traditional continuous friction mode into an on-demand trigger mode, which significantly reduces the running resistance and ineffective wear of the roller assembly without hindering the unblocking efficiency, extends the life of key components, and achieves optimized control of equipment energy consumption, thereby comprehensively improving the system's operating economy and reliability.

[0017] Note: In this invention, the more residual material adheres to the groove of the roller assembly, the closer the hard scraper is to the roller assembly. If the amount of residual material is small, the travel of the hard scraper is short and it may not be able to fully contact the residual material. However, a small amount of residual material means that it will not have a significant impact on the operation of the equipment. Therefore, even if the hard scraper cannot completely remove the residual material when the amount of residual material is small, it is not a problem. The main purpose of this invention is to clear blockages as needed under extreme blockage conditions, thereby reducing the operating load of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the processing box of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal structure of the discharge hood of the present invention.

[0022] Figure 5 This is a schematic diagram of the dust baffle and guide plate structure of the present invention.

[0023] Figure 6 This is a partial cross-sectional top view of the structure of the present invention.

[0024] Figure 7 This is a partial cross-sectional side view of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure for measuring the state of the ball in this invention.

[0026] Figure 9 This is a schematic diagram of the material scraping state of the hard scraper of the present invention.

[0027] Figure 10 This is a partial structural diagram of the present invention.

[0028] Figure 11 This is a side view of the exploded structure of the hard scraper and pusher plate of the present invention.

[0029] Figure 12 This is a schematic diagram of the torsion spring structure of the present invention.

[0030] In the diagram: 1. Processing box; 2. Feeder; 3. Primary crusher; 4. Primary conveyor belt; 5. Primary divider; 6. Secondary conveyor belt; 7. Tertiary conveyor belt; 8. Secondary crusher; 9. Secondary divider; 10. Quaternary conveyor belt; 11. Fifth conveyor belt; 12. Tertiary divider; 13. Discharge hood; 14. Dust baffle; 15. Double roller assembly; 16. Guide plate; 17. Positioning plate; 18. Hard scraper; 19. Rough guide rod; 20. Fixed long rod; 21. Rotating rod; 22. Torsion spring; 23. Measuring ball; 24. Connecting rod; 25. Push plate; 26. PLC controller. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 12 The present invention provides a technical solution: a multifunctional crushing and reducing combined sample preparation system, including a processing box 1, a primary crusher 3 disposed above the processing box 1, a primary reducing device 5 disposed inside the processing box 1, and a secondary crusher 8 disposed inside the processing box 1, and further including: The discharge hood 13 is fixed below the discharge ports of the primary crusher 3 and the secondary crusher 8; the roller assembly 15 is rotatably installed inside the discharge hood 13; and the dynamic scraping assembly is installed inside the discharge hood 13 to adaptively detect the state and position of residual material accumulation and scrape off the corresponding residual material as needed. In specific implementation, as shown in the appendix Figure 3 and attached Figure 4As shown, the roller assembly 15 consists of two sets of meshing rollers. The central shaft of one set of rollers passes through 13 and is connected to the output end of the external drive motor via a coupling. The roller assembly 15 can use a common feeding roller model available on the market. Its driving method, specific connection, and control method can be consistent with the existing technology. This invention only provides simple illustrations and descriptions and will not be elaborated on in detail here.

[0033] The dynamic scraping assembly includes a fixed long rod 20 fixed inside the discharge hood 13, a rotating rod 21 rotatably sleeved on the fixed long rod 20, a measuring ball 23 hinged to one end of the rotating rod 21, and a hard scraper 18 movably disposed above the measuring ball 23.

[0034] A feeder 2 is provided on one side of the processing box 1, and the discharge port of the feeder 2 is connected to the feed port of the primary crusher 3. Inside the processing box 1, below the primary crusher 3, there is a primary conveyor belt 4, and the discharge end of the primary conveyor belt 4 is located directly above the primary divider 5. Inside the processing box 1, below the primary divider 5, there is a secondary conveyor belt 6, and the feed end of the secondary conveyor belt 6 is aligned with one of the discharge ports of the primary divider 5. Inside the processing box 1, below the primary divider 5, there is a third-stage conveyor belt 7, and the feed end of the third-stage conveyor belt 7 is aligned with another discharge port of the primary divider 5. The secondary crusher 8 is located below the secondary conveyor belt 6, and the feed inlet of the secondary crusher 8 is aligned with the discharge end of the secondary conveyor belt 6. Inside the processing box 1, below the third-stage conveyor belt 7, there is a second-stage divider 9, and the inlet of the second-stage divider 9 is aligned with the outlet of the third-stage conveyor belt 7. Inside the processing box 1, below the secondary crusher 8, there is a five-stage conveyor belt 11, and the feed end of the five-stage conveyor belt 11 is aligned with the discharge port of the secondary crusher 8. The processing box 1 is equipped with a four-stage conveyor belt 10, and the feed end of the four-stage conveyor belt 10 is aligned with one of the discharge ports of the two-stage divider 9. The discharge end of the four-stage conveyor belt 10 extends to the outside of the processing box 1. Inside the processing box 1, below the five-stage conveyor belt 11, there is a three-stage divider 12, and the inlet of the three-stage divider 12 is aligned with the outlet of the five-stage conveyor belt 11. A PLC controller 26 is installed at the top of the processing box 1.

[0035] In practical implementation, after feeding by the feeder 2, large pieces of material are initially crushed by the primary crusher 3. Then, the primary conveyor belt 4 transports the smaller particles to the primary divider 5 for initial reduction. Next, the secondary conveyor belt 6 and the tertiary conveyor belt 7 transport the evenly divided sample to the secondary crusher 8 and the secondary divider 9, respectively. The secondary crusher 8 further crushes the sample to ensure the particle size meets the standard. The fifth-stage conveyor belt 11 then transports the sample to the tertiary divider 12. The tertiary divider 12 finally evenly divides the sample into two parts: one part is discharged as an analytical sample from one outlet, and the other part is discharged as a reference sample from the other outlet. The two parts evenly divided by the secondary divider 9 are used as a moisture sample, discharged from one outlet, and the other part is transported as a discard sample by the fourth-stage conveyor belt 10 to the outside of the processing tank 1. This invention utilizes PLC controller 26 technology to automatically complete the entire sample preparation process, achieving high sample preparation efficiency and continuously and rapidly completing feeding, crushing, mixing, and reduction, with minimal sample moisture loss. Furthermore, for example, the conveying units such as the primary conveyor belt 4 are sealed with covers between themselves and the crushing and reducing units. The entire equipment adopts a sealed design, which can significantly reduce dust pollution and meet environmental protection requirements. Multiple opening windows are also designed on the processing box 1 for convenient daily cleaning, maintenance, and repair.

[0036] Two sets of guide plates 16 are symmetrically fixed at the bottom of the discharge ports of the primary crusher 3 and the secondary crusher 8, and the two sets of guide plates 16 are located directly above each set of roller assemblies 15. Two sets of dust baffles 14 are symmetrically fixed at the lower end of the inner wall of the discharge hood 13, and the two sets of dust baffles 14 are located directly below each set of roller assemblies 15.

[0037] In specific implementation, as shown in the appendix Figure 5As shown, both the dust baffle 14 and the guide plate 16 prevent excessive material from entering the non-discharge area and also protect the dynamic scraping assembly from jamming or failure due to excessive material entry. Note: The main function of the dust baffle 14 is to prevent lighter parts of the falling material from being re-entrained and entering the dynamic scraping assembly in large quantities. In addition, there is a clear gap between one end of the dust baffle 14 and the inner wall of the discharge hood 13, providing a secondary discharge channel for some material that has entered the non-discharge area. There is also a clear gap between the other end of the dust baffle 14 and the roller assembly 15, facilitating the discharge of residual material scraped off by the hard scraper 18. Although there are gaps between both ends of the dust baffle 14 and the inner wall of the discharge hood 13 and the roller assembly 15, it cannot completely prevent material backflow, but it can still prevent most of the material backflow. The very small amount of material backflow is not a major concern compared to the material that needs to be discharged after being scraped off. The two ends of the guide plate 16 are infinitely close to the outer wall of the roller assembly 15 and the bottom of the discharge port of the secondary crusher 8, respectively. The bottom of the discharge port of the secondary crusher 8 is infinitely close to the top of the roller assembly 15, almost tangent. Of course, the discharge port of the secondary crusher 8 should be located at the center of the roller assembly 15 to prevent materials from falling into the non-discharge area. However, a very small gap must be left between them to prevent mutual friction damage during equipment operation.

[0038] Several sets of measuring balls 23 are provided, and each set of measuring balls 23 corresponds to a groove of the roller assembly 15. The measuring ball 23 is movably inserted into the groove of the roller assembly 15, and the surface of the measuring ball 23 has been polished and lubricated.

[0039] In practice, each set of measuring balls 23 can adaptively detect the residual material accumulation on the outer wall of each groove, thereby better realizing the scraping operation on demand. The device is more flexible and adaptable, and the rolling friction between the measuring balls 23 and the roller assembly 15 results in less load and wear for both.

[0040] The rotating rod 21 is provided with several groups, and the measuring ball 23 of each group is hinged at the middle of one end of each group of rotating rods 21. The rotating rod 21 is L-shaped, and the bent part of the rotating rod 21 is rotated and sleeved on the outer surface of the fixed long rod 20.

[0041] In practice, when the measuring ball 23 is pushed by the adhered residual material, it will drive the rotating rod 21 to rotate. Firstly, the measuring ball 23 can make way for the residual material to prevent the equipment from getting stuck. Secondly, it provides driving force for the later intervention of the hard scraper 18.

[0042] The dynamic scraping assembly also includes a torsion spring 22 that is movably sleeved on the outer surface of the fixed long rod 20; The fixed long rod 20 consists of a long column and several sets of abutment plates fixed proportionally to the surface of the long column; Both the rotating rod 21 and the torsion spring 22 are sleeved on the outer surface of the long column rod; One end of the torsion spring 22 is pressed against one side of the abutment plate, and the other end of the torsion spring 22 is pressed against the middle of the side wall of the rotating rod 21.

[0043] In specific implementation, the torsion spring 22 can ensure that the measuring ball 23 is in the state of being attached to the outer wall surface of the groove of the roller assembly 15 in the initial state and the reset state. That is, after the measuring ball 23 is passively deflected, once the residual material is insufficient to push the measuring ball 23 away, the torsion spring 22 reset can drive the measuring ball 23 back to the state of being attached to the outer wall of the roller assembly 15.

[0044] The other end of the rotating rod 21 is hinged to a connecting rod 24, and the other end of the connecting rod 24 is hinged to a push plate 25; The push plate 25 consists of a right-angle rod and a triangular plate fixed to one side of the right-angle rod; One end of the right-angle rod is hinged to the other end of the connecting rod 24; The inclined side of the triangle is connected to one end of the hard scraper 18 via a wedge slide rail.

[0045] In specific implementation, as shown in the appendix Figure 11 As shown, the right-angle rod can be raised and lowered by the movement of the connecting rod 24, and the triangular plate will follow the right-angle rod to rise and fall, and drive the hard scraper 18 to move back and forth laterally through the wedge slide rail. For example, when the right-angle rod moves down, the triangular plate will push the hard scraper 18 towards the roller assembly 15, and when the right-angle rod moves up, the triangular plate will pull the hard scraper 18 back.

[0046] The other end of the hard scraper 18 near the roller assembly 15 is chamfered. In specific implementation, as shown in the appendix Figure 11 As shown, the hard scraper 18 is the main component for scraping material. Its bottom can be set as a slope to ensure sufficient scraping. In addition, the remaining part of the hard scraper 18 that contacts the roller assembly 15 should be chamfered as much as possible to prevent the hard scraping of the hard scraper 18 from causing irreversible serious damage to the roller assembly 15 and itself.

[0047] Several sets of hard scrapers 18 are provided, and each set of hard scrapers 18 is located above each set of measuring balls 23; Several sets of hard scrapers 18 are connected in sequence, but are not fixed to each other. The size of the other end of the hard scraper 18 matches the outer wall size of the roller assembly 15.

[0048] In specific implementation, as shown in the appendix Figure 6 and attached Figure 7As shown, although there will not be excessive residual material at the protruding positions of the roller assembly 15, a very small amount of residual material at the protruding positions will adhere more firmly to the surface of the roller assembly 15 under the counter-rotation and squeezing of the roller assembly 15. It is difficult for it to fall off by its own weight or friction with other materials, so it is also necessary to scrape it off with the hard scraper 18. The seamless connection between several sets of hard scrapers 18 is also to scrape off the residual material on the protruding parts while scraping off the residual material in the groove.

[0049] The inside of the discharge hood 13 is symmetrically fixed with positioning plates 17, and several sets of T-shaped grooves are opened on one side of the positioning plates 17. The other end of the push plate 25 slides vertically within the T-shaped groove via a T-shaped slider.

[0050] In practice, the push plate 25 can only move vertically back and forth. In this way, when the connecting rod 24 rotates, the connecting rod 24 will not cause the push plate 25 to deflect. The push plate 25 can smoothly drive the hard scraper 18 to move laterally back and forth.

[0051] Several sets of textured guide rods 19 are slidably inserted through the surface of the positioning plate 17; One end of each set of textured guide rods 19 passes through the positioning plate 17 and is fixedly connected to the side of each set of hard scrapers 18.

[0052] In practice, the textured guide rod 19 provides support for the hard scraper 18 while ensuring that the hard scraper 18 can only move horizontally in the lateral direction, thus ensuring that the hard scraper 18 can fully contact the roller assembly 15.

[0053] Working Principle: When using this multi-functional crushing and reducing combined sample preparation system, the material to be processed is first conveyed to the primary crusher 3 via the feeder 2. The primary crusher 3 crushes large pieces of material and then sends them to the roller assembly 15. The rotation of the roller assembly 15 prevents material blockage and also performs secondary fine crushing. If some highly viscous material adheres to the surface of the roller assembly 15, especially the groove surface of the larger discharge channel, as the roller assembly 15 rotates, the adhered material contacts the measuring ball 23 and squeezes the measuring ball 23, causing the measuring ball 23 to be lifted. The measuring ball 23 drives the rotating rod 21 to rotate, compressing the torsion spring 22. The rotating rod 21 then drives the connecting rod 24 to rotate. The other end of the connecting rod 24 pulls down the push plate 25, causing the push plate 25 to move vertically downward. The triangular plate in the push plate 25 pushes the hard... Scraper 18, the hard scraper 18 is pushed to the roller assembly 15 under the limit of the convex guide rod 19. As the roller assembly 15 continues to rotate, the hard scraper 18 scrapes off the residue adhering to the outer wall of the roller assembly 15. Several sets of measuring balls 23 can detect the blockage in each groove and drive the corresponding hard scraper 18 to scrape off the residue. The hard scrapers 18 in other positions do not contact the roller assembly 15, which can greatly reduce the operating load of the roller assembly 15. When the residue in the groove is scraped off, under the rebound of the torsion spring 22, the rotating rod 21 and the measuring ball 23 return to their original positions. The measuring ball 23 rolls along the outer wall surface of the groove of the roller assembly 15 again. The connecting rod 24 rotates in the opposite direction and pushes the push plate 25 upward. The push plate 25 pulls the hard scraper 18 back, and the hard scraper 18 no longer contacts the roller assembly 15. The falling material enters the next stage device for further reduction and crushing. The specific steps have been explained above and will not be elaborated on here.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multifunctional crushing and reducing combined sample preparation system, comprising a processing box (1), a primary crusher (3) disposed above the processing box (1), a primary reducing device (5) disposed inside the processing box (1), and a secondary crusher (8) disposed inside the processing box (1), characterized in that, Also includes: The discharge hood (13) is fixed below the discharge port of the primary crusher (3) and the secondary crusher (8), the roller assembly (15) is rotatably installed inside the discharge hood (13), and the dynamic scraping assembly is installed inside the discharge hood (13) to adaptively detect the state and position of residual material accumulation and scrape off the corresponding residual material as needed; The dynamic scraping assembly includes a fixed long rod (20) fixed inside the discharge hood (13), a rotating rod (21) rotatably sleeved on the fixed long rod (20), a measuring ball (23) hinged to one end of the rotating rod (21), and a hard scraper (18) movably disposed above the measuring ball (23).

2. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: A feeder (2) is provided on one side of the processing box (1), and the discharge port of the feeder (2) is connected to the feed port of the primary crusher (3). The processing box (1) is equipped with a primary conveyor belt (4) located below the primary crusher (3), and the discharge end of the primary conveyor belt (4) is located directly above the primary divider (5). The processing box (1) is equipped with a secondary conveyor belt (6) located below the primary divider (5), and the feed end of the secondary conveyor belt (6) is aligned with one of the discharge ports of the primary divider (5). The processing box (1) is equipped with a three-stage conveyor belt (7) located below the first-stage divider (5), and the feed end of the three-stage conveyor belt (7) is aligned with another discharge port of the first-stage divider (5).

3. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: The secondary crusher (8) is located below the secondary conveyor belt (6), and the feed inlet of the secondary crusher (8) is aligned with the discharge end of the secondary conveyor belt (6). The processing box (1) is equipped with a secondary divider (9) located below the third-level conveyor belt (7), and the inlet of the secondary divider (9) is aligned with the outlet of the third-level conveyor belt (7).

4. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: The processing box (1) is equipped with a five-stage conveyor belt (11) located below the secondary crusher (8), and the feed end of the five-stage conveyor belt (11) is aligned with the discharge port of the secondary crusher (8). The processing box (1) is equipped with a four-stage conveyor belt (10), and the feed end of the four-stage conveyor belt (10) is aligned with one of the discharge ports of the secondary divider (9). The discharge end of the four-stage conveyor belt (10) extends to the outside of the processing box (1).

5. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: The processing box (1) is equipped with a three-stage divider (12) located below the five-stage conveyor belt (11), and the feed inlet of the three-stage divider (12) is aligned with the discharge end of the five-stage conveyor belt (11). A PLC controller (26) is installed on the top of the processing box (1).

6. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: The discharge ports of the primary crusher (3) and the secondary crusher (8) are symmetrically fixed with two sets of guide plates (16), and the two sets of guide plates (16) are located directly above each set of roller assemblies (15). Two sets of dust baffles (14) are symmetrically fixed at the lower end of the inner wall of the discharge hood (13), and the two sets of dust baffles (14) are located directly below each set of roller assemblies (15).

7. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: The measuring balls (23) are arranged in several groups, and the several groups of measuring balls (23) correspond to each groove of the roller assembly (15); The measuring ball (23) is movably inserted into the groove of the roller assembly (15), and the surface of the measuring ball (23) is polished and lubricated. The rotating rod (21) is provided with several groups, and the measuring ball (23) of each group is hinged at the middle of one end of each rotating rod (21); The rotating rod (21) is L-shaped, and the bent part of the rotating rod (21) is rotated and sleeved on the outer surface of the fixed long rod (20).

8. The multifunctional fragmentation and reduction combined sample preparation system according to claim 1, characterized in that: The dynamic scraping assembly also includes a torsion spring (22) that is movably sleeved on the outer surface of the fixed long rod (20). The fixed long rod (20) consists of a long column and several sets of abutment plates fixed to the surface of the long column in equal proportion; The rotating rod (21) and the torsion spring (22) are both sleeved on the outer surface of the long column rod; One end of the torsion spring (22) is pressed against one side of the abutment plate, and the other end of the torsion spring (22) is pressed against the middle of the side wall of the rotating rod (21).

9. The multifunctional fragmentation and reduction combined sample preparation system according to claim 7, characterized in that: The other end of the rotating rod (21) is hinged to a connecting rod (24), and the other end of the connecting rod (24) is hinged to a push plate (25). The push plate (25) consists of a right-angle rod and a triangular plate fixed to one side of the right-angle rod; One end of the right-angle rod is hinged to the other end of the connecting rod (24); The inclined side of the triangular plate is connected to one end of the hard scraper (18) via a wedge slide rail; The other end of the hard scraper (18) near the roller assembly (15) is chamfered; The hard scraper (18) is provided in several groups, and each group of hard scraper (18) is located above each group of measuring balls (23); Several sets of hard scrapers (18) are connected in sequence, but are not fixed to each other. The size of the other end of the hard scraper (18) matches the outer wall size of the roller assembly (15).

10. The multifunctional fragmentation and reduction combined sample preparation system according to claim 9, characterized in that: The discharge hood (13) is symmetrically fixed with positioning plates (17) inside, and several sets of T-shaped grooves are opened on one side of the positioning plate (17). The other end of the push plate (25) slides vertically within the T-shaped groove via a T-shaped slider; The surface of the positioning plate (17) is slidably inserted with several sets of textured guide rods (19). One end of each group of textured guide rods (19) passes through the positioning plate (17) and is fixedly connected to the side of each group of hard scrapers (18).

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