A sample preparation and reduction machine

Abstract

The present invention relates to the technical field of sample preparation and reduction, and specifically provides a sample preparation and reduction machine, which includes an operating table, a bracket, a feeding hopper, a vibrating feeder, a synchronous moving mechanism, a feeding mechanism, and a receiving mechanism. The synchronous moving mechanism includes a sliding plate, racks are fixed on the sides of the two sliding plates, and the two racks are engaged with gears; the feeding mechanism includes a material distribution chute, one end of the material distribution chute is connected to the vibrating feeder, and the other end is rotatably connected to the sliding plate; the receiving mechanism includes a strip-shaped receiving plate and a receiving bin, and through holes are provided on the strip-shaped receiving plate. When it is necessary to evenly reduce a large sample into multiple small samples, the synchronous moving mechanism drives the strip-shaped receiving plate to reciprocate, so that the discharge port of the material distribution chute can be transferred from one end of the strip-shaped receiving plate to the other end and then back, and the sample is put into the receiving bin through the through hole, realizing feeding in small amounts multiple times. By changing the distance when the strip-shaped receiving plate reciprocates, the large sample can be evenly divided into small samples of different quantities.

Description

Technical Field

[0001] The present invention relates to the technical field of sample preparation and reduction, and particularly to a sample preparation and reduction machine. Background Art

[0002] Sample reduction refers to evenly dividing a large sample that has been prepared into several samples. Sample reduction is of great significance for ensuring the accuracy and representativeness of the detection results of mineral products. GB / T 2007.2-1987 General Rules for Sampling and Sample Preparation of Bulk Mineral Products - Manual Sample Preparation Methods stipulates that sample reduction can be carried out by mechanical methods or manual methods. Manual reduction methods have disadvantages such as large sampling errors, poor representativeness, and cumbersome reduction procedures. At present, the rotary splitter is mostly used for mechanical reduction. The rotary splitters commonly used on the market can mainly evenly reduce the sample to a fixed number of portions.

[0003] A splitter with the patent literature publication number of CN221619585U includes a box body. The upper surface of the box body is fixedly installed with a feed hopper, and a crushing mechanism is arranged at the top of the box body. A screening mechanism is arranged below the crushing mechanism, and a connecting mechanism is arranged between the screening mechanism and the crushing mechanism. The surface of the box body is fixedly installed with a discharge chute. By using the screening mechanism, the connecting shaft drives the cam on the surface to rotate. The convex part of the cam can strike one side of the rotating frame, causing one side of the rotating frame to move downward and deforming the spring. When the convex part of the cam rotates to the upper side, the spring will push the rotating frame upward through its own elastic force to reset the rotating frame. Through the reciprocating strike of the convex part of the cam and in cooperation with the spring, the rotating frame can vibrate to screen the material. However, this patent still has some deficiencies: the number of splitting sets in the prior art is limited by the instrument structure and often can only be split into a fixed number of sets. If different numbers of sets are required, customization is needed. However, during the inspection of imported mineral products, especially high-value minerals such as copper concentrate and gold concentrate, due to the large number of concerned parties, a relatively large number of sample sets are often required, and the number of sets often changes, ranging from 6 to 8 sets at least, 12 to 16 sets at most, and even 20 sets of samples, which brings great inconvenience to the laboratory during the sample preparation process and also greatly reduces the sample preparation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problem that it is difficult to reduce a large sample into multiple sets of samples. The present invention provides a sample preparation and reduction machine to solve the above problems.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A sample preparation and reduction machine includes an operation table, a support, a feeding hopper, and a vibrating feeder. The support is vertically fixed at one end of the operation table. The feeding hopper is fixed on the support. The vibrating feeder is fixed on the operation table and is located below the feeding hopper. It further includes a synchronous movement mechanism, a feeding mechanism, and a material receiving mechanism. The synchronous movement mechanism includes a servo motor, a gear, and two sliding plates. Rack bars are fixed on the sides of the two sliding plates. The two rack bars are respectively engaged with the gear from both sides of the gear. The gear is coaxially fixed with the output shaft of the servo motor. When the gear rotates, it can drive the two sliding plates to move synchronously and in opposite directions through the two rack bars. The servo motor is installed on the operation table. The feeding mechanism includes a material distribution chute. One end of the material distribution chute is connected to the vibrating feeder, and the other end of the material distribution chute is rotatably connected to the sliding plate on the side close to the vibrating feeder. The feeding port of the material distribution chute is located directly below the feeding hopper, and the discharging port of the material distribution chute is located directly above the material receiving mechanism. The material receiving mechanism includes a strip-shaped material receiving plate and a material receiving bin. The material receiving bin is fixed on the sliding plate on the side away from the vibrating feeder. The strip-shaped material receiving plate is fixed on the top of the material receiving bin. A plurality of through holes communicating with the material receiving bin are provided on the strip-shaped material receiving plate.

[0006] Preferably, the synchronous movement mechanism further includes a fixed table, a slide rail, and an end plate. The fixed table is fixedly installed on the upper surface of the operation table. The slide rail is fixed on the fixed table and is located on both sides of the gear. The two sliding plates are respectively slidably connected to the two slide rails through sliders. The end plate is fixed at the end of the sliding plate.

[0007] Preferably, the feeding mechanism further includes a first rotating support rod, a first support, a second rotating support rod, and a second support. The first rotating support rod is fixed on the vibrating feeder. The first support is fixed at the bottom of the feeding port of the material distribution chute. The top of the first rotating support rod is rotatably connected to the first support. The second rotating support rod is fixedly connected to the sliding plate on the side close to the vibrating feeder. The second support is fixed at the bottom of the middle section of the material distribution chute. The top of the second rotating support rod is rotatably connected to the second support.

[0008] Preferably, the material distribution chute includes a material receiving part and an extension part. The extension part is sleeved on the lower end of the material receiving part. The material receiving part is slidably connected to the extension part. The first support is fixedly connected to the material receiving part. The second support is fixedly connected to the extension part.

[0009] Preferably, the material receiving mechanism further includes a plurality of material receiving cylinders arranged in the material receiving bin. The material receiving cylinders are arranged in one-to-one correspondence with the through holes.

[0010] Preferably, a horizontal support plate is arranged in the material receiving bin. Both ends of the horizontal support plate are slidably connected to guide rods. The guide rods are vertically fixed in the material receiving bin. Compression springs are sleeved on the guide rods. One end of each compression spring abuts against the bottom of the horizontal support plate, and the other end abuts against the bottom of the material receiving bin.

[0011] Preferably, the inner wall diameter of the through hole gradually decreases from top to bottom. The minimum diameter of the through hole is smaller than the inner diameter of the material receiving cylinder. A sealing gasket is further fixed to the bottom of the strip-shaped material receiving plate. The sealing gasket is used to seal the gap between the strip-shaped material receiving plate and the material receiving cylinder.

[0012] The beneficial effect of the present invention is that a synchronous movement mechanism and a strip-shaped material receiving plate are provided. When it is necessary to evenly divide a large sample into multiple small samples, the synchronous movement mechanism drives the strip-shaped material receiving plate to reciprocate. Thus, the discharge port of the material distribution chute can be transferred from one end of the strip-shaped material receiving plate to the other end and then back. The sample is put into the material receiving bin through the through hole, realizing feeding in small amounts multiple times, which is beneficial to sample even distribution. By changing the distance when the strip-shaped material receiving plate reciprocates, the large sample can be evenly divided into small samples of different quantities. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0014] Figure 1 It is a schematic structural diagram of the optimal embodiment of a sample preparation and reduction machine of the present invention;

[0015] Figure 2 It is a schematic structural diagram of the strip-shaped material receiving plate of a sample preparation and reduction machine of the present invention;

[0016] Figure 3 It is a schematic structural diagram of the gear of a sample preparation and reduction machine of the present invention;

[0017] Figure 4 It is a schematic structural diagram of the sliding plate of a sample preparation and reduction machine of the present invention;

[0018] Figure 5 It is a schematic structural diagram of the horizontal support plate of a sample preparation and reduction machine of the present invention;

[0019] Figure 6 It is a schematic structural diagram of the extension part of a sample preparation and reduction machine of the present invention.

[0020] Reference numerals: 1, operating platform; 2, support; 3, feeding hopper; 4, vibrating feeder; 5, synchronous moving mechanism; 6, feeding mechanism; 7, receiving mechanism; 8, servo motor; 9, gear; 10, sliding plate; 11, rack; 12, material distribution chute; 13, strip-shaped receiving plate; 14, receiving bin; 15, through hole; 16, fixed platform; 17, slide rail; 18, end plate; 19, first rotating support rod; 20, first support; 21, second rotating support rod; 22, second support; 23, receiving part; 24, extension part; 25, receiving cylinder; 26, horizontal support plate; 27, guide rod; 28, compression spring. Detailed implementation manners

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] First, the concepts involved in the present application will be described below with reference to the accompanying drawings. It should be noted here that the following descriptions of each concept are only for making the content of the present application easier to understand, and do not represent a limitation on the protection scope of the present application; at the same time, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] As Figures 1 to 6 shown, an embodiment of a sample preparation and reduction machine provided by the present invention includes an operating platform 1, a support 2, a feeding hopper 3, and a vibrating feeder 4. The support 2 is vertically fixed at one end of the operating platform 1. The feeding hopper 3 is fixed on the support 2. The vibrating feeder 4 is fixed on the operating platform 1 and is located below the feeding hopper 3. It further includes a synchronous moving mechanism 5, a feeding mechanism 6, and a receiving mechanism 7. The synchronous moving mechanism 5 includes a servo motor 8, a gear 9, and two sliding plates 10. Rack bars 11 are fixed to the sides of the two sliding plates 10. The two rack bars 11 are respectively engaged with the gear 9 from both sides of the gear 9. The gear 9 is coaxially fixed to the output shaft of the servo motor 8. When the gear 9 rotates, it can drive the two sliding plates 10 to move synchronously and in opposite directions through the two rack bars 11. The servo motor 8 is installed on the operating platform 1. The synchronous moving mechanism 5 further includes a fixed platform 16, a slide rail 17, and an end plate 18. The fixed platform 16 is fixedly installed on the upper surface of the operating platform 1. The slide rail 17 is fixed on the fixed platform 16 and is located on both sides of the gear 9. The two sliding plates 10 are respectively slidably connected to the two slide rails 17 through sliders. The end plate 18 is fixed to the end of the sliding plate 10 to fix both ends of the sliding plate 10. While enhancing the structural strength of the sliding plate 10 itself, it can also cover and dust-proof the space below the sliding plate 10.

[0024] The feeding mechanism 6 includes a material distributing chute 12. One end of the material distributing chute 12 is connected to the vibrating feeder 4, and the other end of the material distributing chute 12 is rotatably connected to the sliding plate 10 on the side close to the vibrating feeder 4. The feeding port of the material distributing chute 12 is located directly below the feeding hopper 3, and the discharging port of the material distributing chute 12 is located directly above the receiving mechanism 7.

[0025] The feeding mechanism 6 further includes a first rotating support rod 19, a first support 20, a second rotating support rod 21, and a second support 22. The first rotating support rod 19 is fixed on the vibrating feeder 4, the first support 20 is fixed at the bottom of the feeding port of the material distributing chute 12, the top of the first rotating support rod 19 is rotatably connected to the first support 20, the second rotating support rod 21 is fixedly connected to the sliding plate 10 on the side close to the vibrating feeder 4, the second support 22 is fixed at the bottom of the middle section of the material distributing chute 12, and the top of the second rotating support rod 21 is rotatably connected to the second support 22.

[0026] The material distributing chute 12 includes a material receiving part 23 and an extension part 24. The extension part 24 is sleeved on the lower end of the material receiving part 23, the material receiving part 23 is slidably connected to the extension part 24, the first support 20 is fixedly connected to the material receiving part 23, and the second support 22 is fixedly connected to the extension part 24.

[0027] The working principle of the feeding mechanism 6 is as follows: First, the prepared large portion of the sample is placed into the feeding hopper 3. The sample falls from the bottom of the feeding hopper 3 to the material receiving part 23 of the material distributing chute 12. Then, the vibrating feeder 4 drives the entire material distributing chute 12 to vibrate, conveying the sample in the material receiving part 23 to the extension part 24, and finally falling from the extension part 24 into the receiving mechanism 7, completing the conveyance of the sample. In addition, when the sliding plate 10 moves, the second rotating rod connected to the sliding plate 10 will move accordingly, further extending the distance between the first rotating rod and the second rotating rod. At this time, the extension part 24 is driven and slides forward together, and the material receiving part 23 rotates around the first rotating rod, so that the discharging port of the material distributing chute 12 can always remain above the strip-shaped material receiving plate 13, preventing the sample from spilling out of the strip-shaped material receiving plate 13.

[0028] The material receiving mechanism 7 includes a strip-shaped material receiving plate 13 and a material receiving bin 14. The material receiving bin 14 is fixed on the sliding plate 10 on the side away from the vibrating feeder 4, and the strip-shaped material receiving plate 13 is fixed on the top of the material receiving bin 14. A plurality of through holes 15 communicating with the material receiving bin 14 are provided on the strip-shaped material receiving plate 13. The inner wall diameter of the through hole 15 gradually decreases from top to bottom, and the minimum diameter of the through hole 15 is smaller than the inner diameter of the material receiving cylinder 25. A sealing gasket is also fixed at the bottom of the strip-shaped material receiving plate 13. The sealing gasket is used to seal the gap between the strip-shaped material receiving plate 13 and the material receiving cylinder 25. At this time, the strip-shaped material receiving plate 13 is tightly connected to the top of the material receiving cylinder 25, increasing the height of the opening of the material receiving cylinder 25, effectively preventing the sample from spilling out of the opening of the material receiving cylinder 25 when the material receiving cylinder 25 moves.

[0029] The working principle of the material receiving mechanism 7 is as follows: When it is necessary to evenly divide a large portion of the sample into multiple small samples, start the servo motor 8 and drive the two sliding plates 10 to move synchronously and reversely through the rack 11. Then, through the control unit in the operating platform 1, make the servo motor 8 reverse after rotating a certain number of turns. Then, the servo motor 8 can drive the two sliding plates 10 to reciprocate linearly. When the two sliding plates 10 reciprocate, the sliding plate 10 on the side close to the vibrating feeder 4 drives the material distribution chute 12 to move forward, and the sliding plate 10 on the side away from the vibrating feeder 4 drives the strip-shaped material receiving plate 13 and the material receiving bin 14 to move backward. As a result, the discharge port of the material distribution chute 12 can move from one end of the strip-shaped material receiving plate 13 to the other end faster, and the sample is put into the material receiving bin 14 through the through hole 15. Then, the servo motor 8 rotates reversely, and again makes the discharge port of the material distribution chute 12 pass above the strip-shaped material receiving plate 13 from the opposite direction, and the sample is put into the material receiving bin 14 through the through hole 15. Repeating the above steps can increase the feeding frequency of a single material receiving bin 14, achieve feeding in small amounts but multiple times, which is beneficial to the even distribution of the sample. On the other hand, the discharge port of the material distribution chute 12 and the strip-shaped material receiving plate 13 move synchronously and reversely, which also makes the strip-shaped material receiving plate 13 only need to move a small distance during material receiving, reducing the vibration generated when the material receiving bin 14 moves and preventing the sample from spilling out;

[0030] When it is necessary to evenly divide a large portion of the sample into small samples of different portions, changing the number of turns of the servo motor 8 can adjust the moving distance of the strip-shaped material receiving plate 13 and the discharge port of the material distribution chute 12. For example, making the discharge port of the material distribution chute 12 reciprocate between the three through holes 15 on the strip-shaped material receiving plate 13 can evenly divide the large portion of the sample in the feeding funnel 3 into three small samples.

[0031] It should be noted that in some other embodiments, the number of through holes 15 on the strip-shaped material receiving plate 13 includes, but is not limited to, eight. Any number of through holes 15 can be opened on the strip-shaped material receiving plate 13 according to actual needs (not shown in the figure), so that the discharge port of the material distribution chute 12 can reciprocate between eight or more through holes 15 on the strip-shaped material receiving plate 13, and the large portion of the sample in the feeding funnel 3 can be evenly divided into eight or more small samples to meet the sample reduction requirements in actual use.

[0032] The material receiving mechanism 7 further includes a plurality of material receiving cylinders 25 arranged in the material receiving bin 14. The material receiving cylinders 25 are arranged in one-to-one correspondence with the through holes 15, and the sample enters the material receiving bin 14 through the through holes 15 and is contained by the material receiving cylinders 25.

[0033] A horizontal support plate 26 is arranged in the material receiving bin 14. Both ends of the horizontal support plate 26 are slidably connected with guide rods 27. The guide rods 27 are vertically fixed in the material receiving bin 14. A compression spring 28 is sleeved on the guide rods 27. One end of the compression spring 28 abuts against the bottom of the horizontal support plate 26, and the other end of the compression spring 28 abuts against the bottom of the material receiving bin 14.

[0034] When the volume of the large portion of the sample is large, the material receiving cylinders 25 in the material receiving bin 14 can be replaced with large-capacity material receiving cylinders 25. First, take out the original material receiving cylinders 25, and then press the large-capacity material receiving cylinders 25 between the horizontal support plate 26 and the top of the material receiving bin 14. The horizontal support plate 26 can press the material receiving cylinders 25 with different capacities against the sealing gasket at the bottom of the strip-shaped material receiving plate 13 to prevent the material receiving cylinders 25 from shaking due to the movement of the material receiving bin 14.

Claims

1. A sample preparation and reduction machine, comprising an operating table (1), a bracket (2), a feeding hopper (3) and a vibrating feeder (4). The bracket (2) is vertically fixed at one end of the operating table (1), the feeding hopper (3) is fixed on the bracket (2), and the vibrating feeder (4) is fixed on the operating table (1) and is located below the feeding hopper (3), characterized in that: It also includes a synchronous moving mechanism (5), a feeding mechanism (6), and a material receiving mechanism (7). The synchronous moving mechanism (5) includes a servo motor (8), a gear (9), and two sliding plates (10). Rack bars (11) are fixed to the sides of the two sliding plates (10). The two rack bars (11) mesh with the gear (9) from both sides of the gear (9). The gear (9) is coaxially fixed to the output shaft of the servo motor (8). When the gear (9) rotates, it can drive the two sliding plates (10) to move synchronously and in opposite directions through the two rack bars (11). The servo motor (8) is installed on the operation table (1). The feeding mechanism (6) includes a material distribution chute (12). One end of the material distribution chute (12) is connected to the vibrating feeder (4), and the other end of the material distribution chute (12) is rotatably connected to the sliding plate (10) on the side close to the vibrating feeder (4). The feed inlet of the material distribution chute (12) is located directly below the feeding hopper (3), and the discharge outlet of the material distribution chute (12) is located directly above the material receiving mechanism (7). The material receiving mechanism (7) includes a strip-shaped material receiving plate (13) and a material receiving bin (14). The material receiving bin (14) is fixed to the sliding plate (10) on the side away from the vibrating feeder (4). The strip-shaped material receiving plate (13) is fixed to the top of the material receiving bin (14). A plurality of through holes (15) communicating with the material receiving bin (14) are formed in the strip-shaped material receiving plate (13). The feeding mechanism (6) also includes a first rotating support rod (19), a first support (20), a second rotating support rod (21), and a second support (22). The first rotating support rod (19) is fixed to the vibrating feeder (4). The first support (20) is fixed to the bottom of the feed inlet of the material distribution chute (12). The top of the first rotating support rod (19) is rotatably connected to the first support (20). The second rotating support rod (21) is fixedly connected to the sliding plate (10) on the side close to the vibrating feeder (4). The second support (22) is fixed to the bottom of the middle section of the material distribution chute (12). The top of the second rotating support rod (21) is rotatably connected to the second support (22). The material distribution chute (12) includes a material receiving part (23) and an extension part (24). The extension part (24) is sleeved on the lower end of the material receiving part (23). The material receiving part (23) is slidably connected to the extension part (24). The first support (20) is fixedly connected to the material receiving part (23). The second support (22) is fixedly connected to the extension part (24).

2. The sample preparation and reduction machine according to claim 1, characterized in that: The synchronous moving mechanism (5) further includes a fixed table (16), a slide rail (17) and an end plate (18). The fixed table (16) is fixedly installed on the upper surface of the operating table (1). The slide rail (17) is fixed on the fixed table (16) and located on both sides of the gear (9). The two sliding plates (10) are respectively slidably connected to the two slide rails (17) through sliders. The end plate (18) is fixed to the end of the sliding plate (10).

3. The sample preparation and reduction machine according to claim 1, characterized in that: The material receiving mechanism (7) further includes a plurality of material receiving cylinders (25) arranged in the material receiving bin (14). The material receiving cylinders (25) are arranged in one-to-one correspondence with the through holes (15).

4. The sample preparation and reduction machine according to claim 3, characterized in that: A horizontal support plate (26) is arranged in the material receiving bin (14). The two ends of the horizontal support plate (26) are slidably connected with guide rods (27). The guide rods (27) are vertically fixed in the material receiving bin (14). A compression spring (28) is sleeved on the guide rods (27). One end of the compression spring (28) abuts against the bottom of the horizontal support plate (26), and the other end of the compression spring (28) abuts against the bottom of the material receiving bin (14).

5. The sample preparation and reduction machine according to claim 4, characterized in that: The inner wall diameter of the through hole (15) gradually decreases from top to bottom. The minimum diameter of the through hole (15) is smaller than the inner diameter of the material receiving cylinder (25). A sealing gasket is further fixed to the bottom of the strip-shaped material receiving plate (13). The sealing gasket is used to seal the gap between the strip-shaped material receiving plate (13) and the material receiving cylinder (25).

Images