Solid sample detection pretreatment device

Abstract

The utility model relates to a solid sample detection pretreatment device which comprises a rack, a lower millstone rotatably mounted on the rack and an upper millstone rotatably mounted on the rack in a vertically adjustable manner, the upper millstone is located above the lower millstone, the grinding surfaces of the upper millstone and the lower millstone are opposite to each other, and the rotation directions of the upper millstone and the lower millstone are opposite. According to the disc type grinding mode, the two sides of the solid sample can be subjected to the same extrusion force, the upper grinding disc and the lower grinding disc which are opposite in rotation direction can drive the grinding disc to roll between the upper grinding disc and the lower grinding disc, and then the solid sample has the effect that the shape tends to be round and uniform after being ground.

Description

Technical Field

[0001] The present application relates to the field of detection equipment, and in particular to a solid sample detection pretreatment device. Background Art

[0002] In the field of testing, it is mainly divided into solid and liquid sample testing. For solid samples, when some physical and chemical indicators need to be tested, leaching is often required. Before leaching, the sample needs to be crushed and other pre-processed.

[0003] Currently, applicants also need to perform some pre-processing during their testing operations. For example, patent publication number CN209296412U discloses a solid food testing and pre-processing device, comprising a housing, a feed inlet at the top, fixed legs symmetrically fixedly connected to the bottom of the housing, a protective arc at the top of the housing cavity, a main crushing wheel on one side of the protective arc, a secondary crushing wheel movably connected to the front end of the main crushing wheel via a belt, a guide plate fixedly connected to the bottom of the guide plate, a grinding box fixedly connected to the bottom of the guide plate, and a rotating drum within the grinding box. This solid food testing and pre-processing device, with the main crushing wheel and the secondary crushing wheels driven by the belt, reduces resource usage. The patent provides a rotating drum that fits against the inner wall of the grinding box, ensuring that the device grinds the solid food and thus ensures the pulverization of the solid food. The convex bottom prevents solid food from agglomerating during grinding.

[0004] Regarding the above-mentioned related technologies, the inventors found during actual use that since the device grinds the sample by extrusion crushing and the crushing mechanism is in the form of gear meshing, the sample is gradually squeezed as it is involved more deeply during the crushing process. This causes the sample to be subjected to extremely uneven force, and the size and shape of the crushed particles vary greatly, resulting in low element leaching efficiency in the sample. Summary of the Invention

[0005] In order to improve the uniformity of sample grinding particles and increase the efficiency of element leaching after crushing, the present application provides a solid sample detection pretreatment device.

[0006] The present application provides a solid sample detection pretreatment device that adopts the following technical solution:

[0007] A solid sample detection pretreatment device comprises a frame, a lower grinding disc rotatably mounted on the frame, and an upper grinding disc rotatably mounted on the frame so as to be adjustable up and down, wherein the upper grinding disc is located above the lower grinding disc, the grinding surfaces of the upper grinding disc and the lower grinding disc are opposite to each other, and the upper grinding disc and the lower grinding disc rotate in opposite directions.

[0008] By adopting the above technical solution, compared with the gear-type crushing mechanism, the grinding disc type crushing mechanism can make the solid sample evenly stressed on both sides during the grinding process, and in the grinding process, since the upper and lower grinding discs rotate in opposite directions, the solid sample will rotate with the rotation of the upper and lower grinding discs, making the solid sample as a whole tend to be round. At this time, the ground sample powder particles will be more uniform and consistent, so that the solid sample powder can be immersed more fully; at the same time, the upper grinding disc that can be adjusted up and down can adjust the distance between itself and the lower grinding disc according to the detection needs, so that the device can adjust the size of the grinding particles according to actual needs.

[0009] Preferably, the upper grinding disc is suspended above the lower grinding disc through a bracket, and thrust ball bearings are respectively installed on the rotating shaft of the upper grinding disc and on the upper and lower sides of the bracket. An elastic member is sleeved on the rotating shaft of the upper grinding disc and between the thrust ball bearings below the upper grinding disc and the bracket, and the two ends of the elastic member are respectively pressed against the surface of the thrust ball bearing and the upper grinding disc, and a stop member is provided on the rotating shaft of the upper grinding disc for limiting the upper grinding disc from detaching from the bracket.

[0010] By adopting the above technical solution, the stop member is used to prevent the upper grinding disc from falling, and the two thrust ball bearings are used to bear the force of the elastic member and reduce the rotational friction resistance of the upper grinding disc. At the same time, the elastic member provides the upper grinding disc with a continuous and variable grinding force, so that during the grinding process, even if the solid sample gradually becomes smaller, as long as it does not reach the level of conflict between the stop member and the thrust ball bearing, it will be subjected to the continuous squeezing force of the upper grinding disc, thereby ensuring that the solid sample is fully ground into place.

[0011] Preferably, a stop screw hole is provided on one end of the rotating shaft of the upper grinding disc located above the bracket and distributed along its axial direction. The stop member is screwed into the stop screw hole, and the stop member abuts against the side of the thrust ball shaft located above the bracket that is away from the bracket.

[0012] By adopting the above technical solution, the stop piece is adjusted to cooperate with the stop screw holes in different positions, so that the distance between the upper grinding plate and the lower grinding plate can be adjusted, so that the position of the upper grinding plate relative to the lower grinding plate can be moved up and down, thereby enabling the equipment to have the function of adjusting the grinding size of solid sample particles.

[0013] Preferably, the upper grinding disc and its own rotating shaft are provided with a feeding hole penetrating along the axial direction thereof.

[0014] By adopting the above technical solution, the feed hole can conveniently feed the material from the center of the upper grinding disc. After the solid sample is fed from the center of the upper grinding disc, as the upper and lower grinding discs rotate, it will gradually move toward the edge of the lower grinding disc under the action of centrifugal force and fall onto the rack table, so that the grinding direction of all samples remains highly consistent, thereby making the sample grinding more uniform.

[0015] Preferably, the diameter of the feed hole gradually decreases as it extends toward the lower grinding disc.

[0016] By adopting the above technical solution, the larger diameter part of the feeding hole with gradually changing diameter can be used as a storage bin for solid samples, while the smaller diameter end is used as the discharge end, so that the sample entering each time of grinding can be controlled within a reasonable range, thereby making the sample grinding more fine and uniform.

[0017] Preferably, a driving mechanism for driving the lower grinding disc to rotate is provided in the frame, and the driving mechanism includes a driving motor fixed on the frame, a driving pulley fixed on the output shaft of the driving motor, and a driven pulley fixed on the rotating shaft of the lower grinding disc, and the driving pulley and the driven pulley are linked by a belt.

[0018] By adopting the above technical solution, the driving motor drives the lower grinding disc to rotate through the belt, and the lower grinding disc grinds the solid sample together with the upper grinding disc during the rotation process, thereby achieving the effect of grinding the sample.

[0019] Preferably, the lower grinding disc and the upper grinding disc are transmitted through a linkage mechanism, and the linkage mechanism includes a linkage shaft rotatably mounted on the frame, a linkage gear fixed coaxially with the driven pulley, a follower gear fixed on the linkage shaft close to the driven pulley, a linkage pulley fixed on the linkage shaft away from the driven pulley end, and a follower pulley fixed on the rotating shaft of the upper grinding disc, the linkage gear and the follower gear are engaged with each other, and the linkage pulley and the follower pulley are linked by a belt.

[0020] By adopting the above technical solution, the meshing of the linkage gear and the follower gear makes the rotation direction of the linkage shaft opposite to that of the lower grinding disc, and the belt connection between the linkage pulley and the follower pulley makes the rotation direction of the upper grinding disc and the linkage shaft the same. Then, with the linkage shaft as the intermediate medium, the kinetic energy of the lower grinding disc can be transmitted, and the rotation directions of the upper grinding disc and the lower grinding disc are opposite, thereby ensuring the grinding effect of the sample.

[0021] Preferably, a collecting slot is provided on the table top of the frame, and a box extraction opening is provided on the side wall of the frame. A collecting box is inserted into the box extraction opening, and the collecting box is opposite to the collecting slot.

[0022] By adopting the above technical solution, after the ground sample falls onto the rack, it can fall into the collection box through the collection slot, thereby facilitating the collection of the ground sample.

[0023] Preferably, the collecting slots are distributed on both sides of the lower grinding disc, and the table top of the frame gradually sinks as it extends from the side close to the lower grinding disc to the side of the collecting slots. The collecting box is provided with a clearance opening for the rotating shaft of the lower grinding disc to pass through, and the clearance opening makes the collecting box concave in shape.

[0024] By adopting the above technical solution, the table top of the frame will form a slope during the gradual sinking process. When the ground sample falls from the lower grinding disc, it can gradually slide into the collection box along the slope, which is conducive to the collection of the ground sample.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] The disc grinding method can make both sides of the solid sample be subjected to the same extrusion force, and the upper and lower grinding discs rotating in opposite directions can drive the grinding to roll between the two, thereby making the shape of the solid sample tend to be round and uniform after grinding;

[0027] The center-feed upper grinding disc can make the solid sample always grind in one direction, which is beneficial to further improve the grinding uniformity of the sample;

[0028] The upper grinding disc which can be adjusted up and down can adjust the grinding degree of the particles according to the actual size of the particles required for detection, thereby making the device more applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the overall structural diagram of this embodiment (the frame is in the shape of a plate removed on one side);

[0030] Figure 2 Schematic diagram of the cross-sectional structure of the grinding disc in this embodiment;

[0031] Figure 3 yes Figure 1 A local enlarged view at point A;

[0032] Figure 4 yes Figure 1 A partial enlarged view of point B in the figure.

[0033] Explanation of the accompanying reference numerals: 1. Frame; 11. Bracket; 12. Collecting slot; 13. Box extraction port; 2. Upper grinding disc; 21. Rotating shaft; 211. Stop screw hole; 212. Stop member; 22. Feeding hole; 3. Lower grinding disc; 4. Thrust ball bearing; 5. Elastic member; 6. Driving mechanism; 61. Driving motor; 62. Driving pulley; 63. Driven pulley; 7. Linkage mechanism; 71. Linkage shaft; 72. Linkage gear; 73. Follower gear; 74. Linkage pulley; 75. Follower pulley; 8. Belt; 9. Collection box; 91. Giving port. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The present application discloses a solid sample detection pretreatment device, referring to Figure 1 and Figure 2 The machine comprises a frame 1, an upper grinding disc 2, and a lower grinding disc 3. The frame 1 is in the shape of a three-dimensional table. A feed hole 22 is provided in the center of the upper grinding disc 2, axially penetrating the upper grinding disc 2 and its own rotating shaft 21. The feed hole 22 gradually decreases in diameter as it extends from the free end of the rotating shaft 21 of the upper grinding disc 2 toward the side of the upper grinding disc 2 facing away from its own rotating shaft 21. The upper grinding disc 2 is suspended above the table surface of the frame 1 by a bracket 11. Specifically, the bracket 11 is in the shape of a vertical arm, and the rotating shaft 21 of the upper grinding disc 2 penetrates the bracket 11.

[0036] Reference Figure 1 and Figure 3 In order to prevent the upper grinding disc 2 from falling, thrust ball bearings 4 are installed on the rotating shaft 21 of the upper grinding disc 2 and on the upper and lower sides of the bracket 11. At the same time, a plurality of stop screw holes 211 are opened on the rotating shaft 21 of the upper grinding disc 2 along its axial direction, and a cylindrical stop member 212 is screwed into one of the stop screw holes 211. The stop member 212 is tightly pressed against the thrust ball bearing 4 located above the bracket 11, thereby preventing the upper grinding disc 2 from falling.

[0037] To impart a downward grinding force to the lower grinding disc 3, an elastic member 5 is sleeved on the rotating shaft 21 of the upper grinding disc 2. The elastic member 5 can be any component capable of generating an elastic force upon deformation, and in this embodiment, a spring is preferably employed. The elastic member 5 is positioned between the upper grinding disc 2 and the thrust ball bearing 4 below the bracket 11, with its ends respectively abutting against the thrust ball bearing 4 and the surface of the upper grinding disc 2, thereby imparting a downward grinding force to the upper grinding disc 2.

[0038] The lower grinding disc 3 is rotatably mounted on the frame 1 and is located directly below the upper grinding disc 2 , while the upper grinding disc 2 and the lower grinding disc 3 are coaxial in the vertical direction.

[0039] Reference Figure 1 A driving mechanism 6 for driving the lower grinding disc 3 to rotate is provided in the frame 1. The driving mechanism 6 includes a driving motor 61, a driving pulley 62, and a driven pulley 63. The driving motor 61 is fixed inside the frame 1, the driving pulley 62 is fixed to the output shaft of the driving motor 61, and the driven pulley 63 is fixed to the rotating shaft of the lower grinding disc 3. The driving pulley 62 and the driven pulley 63 are linked by a belt 8.

[0040] To reduce the number of components and the size of the device, a linkage mechanism 7 is provided between the lower grinding disc 3 and the upper grinding disc 2 for transmission. The linkage mechanism 7 comprises a linkage shaft 71, a linkage gear 72, a follower gear 73, a linkage pulley 74, and a follower pulley 75. The linkage shaft 71 is rotatably mounted on the frame 1, with one end located within the frame 1 and the other end penetrating the surface of the frame 1 to the same height as the upper grinding disc 2. The linkage gear 72 is coaxially fixed to the driven pulley 63. The follower gear 73 is fixed to the end of the linkage shaft 71 closest to the driven pulley 63. The linkage pulley 74 is fixed to the end of the linkage shaft 71 away from the driven pulley 63. The follower pulley 75 is fixed to the rotating shaft 21 of the upper grinding disc 2 and is located above the stop 212. After installation, the linkage gear 72 and the follower gear 73 are meshed with each other, and the linkage pulley 74 and the follower pulley 75 are linked by the belt 8, so that the upper grinding disc 2 and the lower grinding disc 3 rotate in opposite directions through this series of intermediate transmission components.

[0041] Reference Figure 1 and Figure 4 To facilitate the collection of samples after grinding, collection slots 12 are symmetrically provided on the tabletop of the frame 1, located on both sides of the lower grinding disc 3. The tabletop of the frame 1 gradually sinks as it extends from the side closest to the lower grinding disc 3 toward the collection slots 12, forming a slope. A box drawer 13 is provided on the sidewall of the frame 1, into which a collection box 9 is inserted. The collection box 9 is concave in shape, and its concave structure forms a clearance opening 91 for the rotating shaft of the lower grinding disc 3 to pass through. After installation, the collection box 9 is located directly below the collection slots 12.

[0042] The implementation principle of a solid sample detection pretreatment device in an embodiment of the present application is as follows: after the sample is put into the discharge hole 22 in the center of the upper grinding disc 2, it gradually enters between the upper and lower grinding discs 3 as the upper and lower grinding discs 3 rotate, and is driven by the two to produce rotational grinding. At the same time, during the grinding process, it gradually moves to the edge of the lower grinding disc 3 under the action of centrifugal force, and finally falls onto the table of the frame 1, and slides into the collection box 9 along the slope formed by the depression of the table of the frame 1. This rolling grinding structure makes the force on both sides of the solid sample uniform, and due to the self-rotation of the sample during the grinding process, the ground sample will gradually tend to be round and uniform, so that the device has a good grinding effect.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A solid sample detection pretreatment device, comprising a frame (1), characterized in that: The machine comprises a lower grinding disc (3) rotatably mounted on a frame (1), and an upper grinding disc (2) rotatably mounted on the frame (1) in an adjustable manner up and down, wherein the upper grinding disc (2) is located above the lower grinding disc (3), the grinding surfaces of the upper grinding disc (2) and the lower grinding disc (3) are opposite to each other, and the rotation directions of the upper grinding disc (2) and the lower grinding disc (3) are opposite to each other; The upper grinding disc (2) is suspended above the lower grinding disc (3) through a bracket (11); thrust ball bearings (4) are respectively installed on the rotating shaft (21) of the upper grinding disc (2) and located on the upper and lower sides of the bracket (11); an elastic member (5) is sleeved on the rotating shaft (21) of the upper grinding disc (2) and located between the upper grinding disc (2) and the thrust ball bearing (4) below the bracket (11); the two ends of the elastic member (5) are respectively pressed against the surface of the thrust ball bearing (4) and the upper grinding disc (2); and a stop member (212) is provided on the rotating shaft (21) of the upper grinding disc (2) for limiting the upper grinding disc (2) from separating from the bracket (11); A stop screw hole (211) is provided on one end of the rotating shaft (21) of the upper grinding disc (2) located above the bracket (11) and distributed along its axial direction. The stop member (212) is screwed into the stop screw hole (211), and the stop member (212) contacts the side of the thrust ball shaft located above the bracket (11) that faces away from the bracket (11). The upper grinding disc (2) and its own rotating shaft (21) are provided with a feeding hole (22) penetrating along the axial direction thereof.

2. A solid sample detection pretreatment device according to claim 1, characterized in that: The diameter of the discharge hole (22) gradually decreases as it extends toward the lower grinding disc (3).

3. The solid sample detection pretreatment device according to claim 1, characterized in that: A driving mechanism (6) for driving the lower grinding disc (3) to rotate is provided in the frame (1), the driving mechanism (6) comprising a driving motor (61) fixed on the frame (1), a driving pulley (62) fixed on the output shaft of the driving motor (61), and a driven pulley (63) fixed on the rotating shaft of the lower grinding disc (3), wherein the driving pulley (62) and the driven pulley (63) are linked via a belt (8).

4. A solid sample detection pretreatment device according to claim 3, characterized in that: The lower grinding disc (3) and the upper grinding disc (2) are driven by a linkage mechanism (7). The linkage mechanism (7) comprises a linkage shaft (71) rotatably mounted on the frame (1), a linkage gear (72) coaxially fixed with the driven pulley (63), a follower gear (73) fixed on one end of the linkage shaft (71) close to the driven pulley (63), a linkage pulley (74) fixed on one end of the linkage shaft (71) away from the driven pulley (63), and a follower pulley (75) fixed on the rotating shaft (21) of the upper grinding disc (2). The linkage gear (72) and the follower gear (73) are meshed with each other, and the linkage pulley (74) and the follower pulley (75) are linked by a belt (8).

5. The solid sample detection pretreatment device according to claim 1, characterized in that: A collecting slot (12) is provided on the tabletop of the frame (1), and a box extraction opening (13) is provided on the side wall of the frame (1). A collecting box (9) is inserted into the box extraction opening (13), and the collecting box (9) is opposite to the collecting slot (12).

6. The solid sample detection pretreatment device according to claim 5, characterized in that: The collecting slots (12) are distributed on both sides of the lower grinding disc (3), and the table surface of the frame (1) gradually sinks in the process of extending from the side close to the lower grinding disc (3) to the side of the collecting slots (12). The collecting box (9) is provided with a clearance opening (91) for the rotating shaft of the lower grinding disc (3) to pass through, and the clearance opening (91) makes the collecting box (9) concave.

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