Coral sand particle size and shape double sorting device

Abstract

The utility model discloses a coral sand particle size and shape double sorting device which comprises a plurality of sorting systems, a sorting system fixing support and a screening machine, and the sorting systems comprise a particle size sorting system, a flaky particle sorting system and a block-shaped and rod-shaped particle sorting system which are sequentially connected from top to bottom. The screening machine is compatible with an existing standard inspection screening machine and is simple in structure, complex mechanical equipment does not need to be introduced on the basis that a traditional particle size sorting function is reserved, the screen is customized according to needs during use, and the equipment transformation cost is remarkably reduced; the device disclosed by the utility model can be used for simultaneously screening various sample particles in different target particle size ranges and respectively screening the sample particles in different target particle size ranges in a sheet shape, a block shape and a rod shape.

Description

Technical Field

[0001] This utility model belongs to the field of particle screening technology, specifically relating to a dual sorting device for coral sand particles based on particle size and shape. Background Technology

[0002] Currently, the sieving of coral sand in laboratories mainly employs traditional standard screening machines, which separate spherical or near-spherical particles of different sizes by varying the screen size. However, this method struggles to effectively distinguish coral sand particles of different shapes (such as flakes, rods, and blocks) within the same size range. To address this issue, some patents have proposed new sorting methods.

[0003] The existing technology utilizes a combination of screening chutes and screening drop troughs to ensure that strip-shaped coral sand enters the bottom screening area horizontally, thereby achieving the classification of strip-shaped particles. However, it has the following shortcomings: (1) The screening area is small, the screening efficiency is low, and it is difficult to meet the needs of batch screening; (2) It requires all strip-shaped coral sand particles to enter the screening area horizontally, which is too demanding for coral sand particles that are in a state of continuous vibration; (3) This device is only suitable for the sorting of strip-shaped particles and it is difficult to achieve the complete separation of flaky, rod-shaped, and block-shaped coral sand particles.

[0004] In the existing technology, aggregate particles are separated by flaky sieve holes and elliptical sieve holes. However, the following problems exist: (1) Incompletely separated flaky particles may fall into the needle collection box through the needle gauge, resulting in reduced screening accuracy; (2) The equipment adopts a manual screening method, which has low screening efficiency and is prone to sieve hole blockage, making it difficult to meet the needs of large-scale sorting.

[0005] Existing sorting methods based on the difference in particle velocity on an inclined fabric plate can classify catalyst materials into spherical, ellipsoidal, and non-spherical particles. However, this method is suitable for particles with smooth surfaces and whose shape is sensitive to velocity. Coral sand particles, as a special biogenic geotechnical engineering material, have rough and porous surfaces, and some rod-shaped particles also have branched structures (such as staghorn coral remains), making it difficult to effectively distinguish coral sand particles of different shapes based on velocity.

[0006] Furthermore, while some existing particle optical color sorting equipment on the market has shape sorting capabilities, its sorting accuracy is low, making it difficult to accurately sort coral sand particles smaller than 2mm by shape. At the same time, such equipment is expensive, has low sorting efficiency, and is subject to stringent environmental conditions (for example, the large amount of dust generated by broken coral sand particles can interfere with the equipment's scanning), making it unsuitable for large-scale shape sorting operations. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a dual sorting device for coral sand particles based on both particle size and shape.

[0008] The above-mentioned objectives of this utility model are achieved through the following technical means:

[0009] A dual sorting device for coral sand particles based on particle size and shape includes a screening machine, and further includes a particle size sorting system, a flaky particle sorting system, and a block and rod-shaped particle sorting system connected sequentially from top to bottom. It also includes a sorting system mounting bracket and multiple sample collection boxes. The particle size sorting system is equipped with a top cover. The particle size sorting system, flaky particle sorting system, and block and rod-shaped particle sorting system are all housed within the sorting system mounting bracket, which is mounted on a vibration mechanism at the top of the screening machine. The flaky particle sorting system includes multiple flaky screening boxes connected sequentially from top to bottom. Each flaky screening box is equipped with an inclined guide plate. The outer periphery of the inclined guide plate of each flaky screening box is connected to the inner wall of the corresponding flaky screening box. The inclined guide plate of each flaky screening box divides the interior of the corresponding flaky screening box into an upper collection area and a lower screening area. Each flaky screening box has an outlet on the side wall of its collection area, and the outlet of each flaky screening box is connected to different sample collection boxes via guide pipes.

[0010] As described above, the particle size separation system includes an upper screening box and n target particle size screening boxes connected sequentially from top to bottom. The top of the upper screening box is connected to the top cover. The flaky particle separation system includes n flaky screening boxes connected sequentially from top to bottom. The block and rod-shaped particle separation system includes n block and rod-shaped screening boxes and a collection box connected sequentially from top to bottom. The bottom of the lowest target particle size screening box is connected to the top of the highest flaky screening box. The bottom of the lowest flaky screening box is connected to the top of the highest block and rod-shaped screening box. The bottom of the lowest block and rod-shaped screening box is connected to the top of the collection box.

[0011] As mentioned above, the bottom screens of the upper screening box and each target particle size screening box are all single-layer round hole screens, and the screen apertures of the upper screening box and each target particle size screening box gradually decrease from top to bottom.

[0012] As described above, the bottom of the sheet-like screening box and the block and rod-shaped screening boxes are all screens. Each block and rod-shaped screening box is equipped with an inclined guide plate. The outer periphery of the inclined guide plate of each block and rod-shaped screening box is connected to the inner wall of the corresponding block and rod-shaped screening box. The inclined guide plate of each block and rod-shaped screening box divides the interior of the corresponding block and rod-shaped screening box into an upper collection area and a lower screening area. The side wall of the collection area of ​​each block and rod-shaped screening box and the side wall of the collection box are provided with an outlet. The collection area of ​​each block and rod-shaped screening box and the outlet of the collection box are connected to the sample collection box through a guide pipe.

[0013] As mentioned above, the sieve openings of the sheet-like screening box are strip-shaped sieve openings. The length of the sieve openings of the sheet-like screening box is twice the width of the sieve openings. When i is 1, the sieve opening length of the sieve of the i-th sheet-like screening box is the same as the sieve opening diameter of the sieve of the upper screening box. When i is 2 to n, the sieve opening length of the sieve of the i-th sheet-like screening box is the same as the sieve opening diameter of the sieve of the (i-1)-th target particle size screening box. i is the serial number, and i takes values ​​from 1 to n.

[0014] As described above, the screens of the block and rod screening boxes include an upper screen and a lower screen. Both the upper and lower screens are round-hole screens. The aperture of the lower screen is twice that of the upper screen. The aperture of the lower screen is the same as the aperture spacing of the upper screen. The aperture spacing of the lower screen is the same as the aperture of the upper screen. The apertures of the upper and lower screens are staggered in the vertical direction. When i is 1, the aperture of the upper screen of the i-th block and rod screening box is the same as the aperture of the screen of the upper screening box. When i is 2 to n, the aperture of the upper screen of the i-th block and rod screening box is the same as the aperture of the screen of the (i-1)-th target particle size screening box.

[0015] As described above, the top of the upper screening box, each target particle size screening box, each sheet screening box, each block and rod screening box, and the collection box are all provided with the same connecting grooves along the circumference. The bottom of the upper screening box, each target particle size screening box, each sheet screening box, each block and rod screening box, and the collection box are all provided with the same connecting protrusions along the circumference. The bottom of the top cover is also provided with the same connecting protrusions. The size and shape of the connecting protrusions and the connecting grooves are adapted to each other. Valves are provided on the side walls of the upper screening box and each target particle size screening box, and valves are provided on the side walls of the screening areas of each sheet screening box and each block and rod screening box.

[0016] As described above, the sorting system fixing bracket includes a base, multiple vertical screws, and a crossbar. The base is also provided with connecting grooves. The screws are evenly distributed on both sides of the sorting system. The base is provided with multiple connecting seats, and the screws are inserted into the connecting seats. The screws are provided with connecting handles. The crossbar is mounted between two corresponding screws. The base of the screen fixing bracket is mounted and fixed on the vibration mechanism at the top of the screening machine. The connecting protrusion at the bottom of the collection box is adapted to connect with the connecting groove of the base. The crossbar is pressed against the top cover. The two ends of the crossbar are respectively inserted into the connecting handles on the screws on both sides. The fixing nuts are tightened from the top of the screws onto the connecting handles, and the crossbar is pressed tightly against the top cover.

[0017] As mentioned above, before sieving, the volume of sample particles in the upper screening box of the particle size sorting system is 1 / 3 to 1 / 2 of the volume of the upper screening box.

[0018] Before sieving, the volume of sample particles in each sheet-like screening box in the sheet-like particle sorting system is 1 / 3 to 1 / 2 of the volume of the corresponding sheet-like screening box.

[0019] Before sieving, the volume of sample particles in each block and rod screening box in the block and rod particle sorting system is 1 / 3 to 1 / 2 of the volume of the corresponding block and rod screening box.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] (1) It is compatible with existing standard screening machines, has a simple structure, and is easy to promote. While retaining the traditional particle size sorting function, it achieves shape sorting by adding multi-level irregular shaped screens (such as strip screen mesh, double-layer round hole screen mesh, etc.). There is no need to introduce complex mechanical equipment. Screens can be customized as needed, which significantly reduces the equipment modification cost. At the same time, this utility model patent has a simple structure and is easy to operate, making it easy to promote and apply in resource-constrained environments such as laboratories and island and reef engineering.

[0022] (2) The present invention divides the screening box of the shape sorting system into a screening area and a collection area by means of an inclined guide plate. This reduces the number of screening boxes by 50% while ensuring accurate screening, thus simplifying the screening system. At the same time, a valve is added to the side wall of the screening box to facilitate the transport of the screened sand sample to the lower shape sorting system and the sample collection box through the guide pipe, thereby reducing the manual disassembly of the equipment and improving the sorting efficiency.

[0023] (3) The device of this utility model can simultaneously screen out sample particles of various different particle diameters and perform sieving of sample particles of various different particle diameters in the form of flakes, blocks and rods, realizing the complete separation of flakes, rods and blocks of coral sand within the same particle size range, effectively avoiding the "missing sieve" and "mixed sieve" phenomena in traditional equipment.

[0024] (4) This utility model can also be extended to the shape sorting of other non-spherical particles such as mineral particles and ceramic particles by adjusting the size and shape of the sieve holes, providing an efficient and economical universal sorting solution for materials science and other fields. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the device of this utility model;

[0026] Figure 2 This is a classification diagram of the sheet-like, block-like, and rod-shaped coral sand particles of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of one of the target particle size screening boxes of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of one of the sheet-shaped screening boxes of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of one of the block and rod-shaped screening boxes of this utility model;

[0030] Figure 6 This is a schematic diagram illustrating the screening principle of the block and rod-shaped particle sorting system of this utility model.

[0031] Figure labels and corresponding component names:

[0032] 1-Sorting system fixed bracket; 2-Particle size sorting system; 3-Flake particle sorting system; 4-Block and rod particle sorting system; 5-Valve; 6-Connecting protrusion; 7-Connecting groove; 8-Guide pipe; 9-Screwing machine; 10-Fixing nut; 11-Connecting handle; 12-Crossbar; 13-Screw; 14-Upper screening box; 15-Target particle size screening box; 16-Flake screening box; 17-Inclined guide plate; 18-Block and rod screening box; 19-Collection box; 20-Base. Detailed Implementation

[0033] To facilitate understanding and implementation of this utility model by those skilled in the art, the present utility model will be further described in detail below with reference to embodiments. The embodiments described herein are only for illustration and explanation and are not intended to limit the present utility model.

[0034] Example 1:

[0035] A dual sorting device for coral sand particles based on particle size and shape includes three sorting systems (particle size sorting system 2, flaky particle sorting system 3, and block and rod-shaped particle sorting system 4), a sorting system fixing bracket 1, and a screening machine 9. The particle size sorting system 2, flaky particle sorting system 3, and block and rod-shaped particle sorting system 4 are connected sequentially from top to bottom. The particle size sorting system 2 is equipped with a top cover. The particle size sorting system 2, flaky particle sorting system 3, and block and rod-shaped particle sorting system 4 are housed in the sorting system fixing bracket 1, which is mounted on a vibration mechanism (such as a spring) at the top of the screening machine 9. The particle size sorting system 2 includes an upper screening box 14 and n target particle size screening boxes 15 connected sequentially from top to bottom. The top of the upper screening box 14 is connected to... Specifically, the bottom of the upper screening box 14 is connected to the top of the uppermost target particle size screening box 15. The tops of all other target particle size screening boxes 15, except the uppermost one, are connected to the bottoms of the target particle size screening boxes 15 above them. The flake particle sorting system 3 includes n flake screening boxes 16 connected from top to bottom. The block and rod particle sorting system 4 includes n block and rod screening boxes 18 and a collection box 19 connected from top to bottom. The bottom of the lowermost target particle size screening box 15 is connected to the top of the uppermost flake screening box 16. The bottom of the lowermost flake screening box 16 is connected to the top of the uppermost block and rod screening box 18. The bottom of the lowermost block and rod screening box 18 is connected to the top of the collection box 19.

[0036] The bottom screens of the upper screening box 14 and each target particle size screening box 15 in the particle size sorting system 2 are all single-layer round hole screens. The particle size sorting system 2 consists of the upper screening box 14 and the first to nth target particle size screening boxes 15 from top to bottom. The sieve aperture of the screens of the upper screening box 14 and each target particle size screening box 15 of the particle size sorting system 2 decreases gradually from top to bottom. Each target particle size screening box 15 sorts out sample particles within the set target particle size range. The sieve aperture of each target particle size screening box 15 is the lower limit of the corresponding target particle size range. The sieve aperture of the upper screening box 14 is the maximum target particle size, and the sieve aperture of the bottommost target particle size screening box 15 is the minimum target particle size.

[0037] When using the particle size sorting system 2 for sieving, the screening machine 9 vibrates in both horizontal and vertical directions. The particle size sorting system 2 can screen out samples with various target particle size ranges (the sample in this embodiment is coral sand). Coral sand particles with a diameter larger than the maximum target particle size remain in the upper screening box 14, while coral sand particles with a diameter smaller than the minimum target particle size fall into the collection area of ​​the first sheet-like screening box 16 of the sheet-like particle sorting system 3. Coral sand particles with different target particle size ranges remain in the corresponding target particle size screening box 15. Figure 1 The upper screening box 14 and the two target particle size screening boxes 15 shown are used to indicate the positional connection relationship and do not mean that the particle size sorting system 2 has only two target particle size screening boxes 15. The actual particle size sorting system 2 may include multiple target particle size screening boxes 15.

[0038] The sieve aperture of the upper screening box 14 and each target particle size screening box 15 of the particle size sorting system 2 shall meet the requirements of the "Standard for Geotechnical Testing Methods" (GB / T50123-2019);

[0039] Table 1 shows the sieve aperture sizes of the sieves in an example of the upper screening box 14 and the screening boxes 15 for various target particle sizes.

[0040]

[0041] The bottom of both the sheet-shaped screening box 16 and the block and rod-shaped screening box 18 is a screen, and both the sheet-shaped screening box 16 and the block and rod-shaped screening box 18 are equipped with inclined guide plates 17.

[0042] The outer periphery of the inclined guide plate 17 of each sheet-shaped screening box 16 is connected to the inner wall of the corresponding sheet-shaped screening box 16. The inclined guide plate 17 of each sheet-shaped screening box 16 is at a set angle to the screen of the corresponding sheet-shaped screening box 16. The inclined guide plate 17 of each sheet-shaped screening box 16 divides the interior of the corresponding sheet-shaped screening box 16 into an upper collection area and a lower screening area.

[0043] The outer periphery of the inclined guide plate 17 of each block and rod screening box 18 is connected to the inner wall of the corresponding block and rod screening box 18. The inclined guide plate 17 of each block and rod screening box 18 is at a set angle to the screen of the corresponding block and rod screening box 18. The inclined guide plate 17 of each block and rod screening box 18 divides the interior of the corresponding block and rod screening box 18 into an upper collection area and a lower screening area.

[0044] Since coral sand is mainly composed of flaky, blocky, and rod-shaped particles, this embodiment uses a flatness ratio of 0.5 as a threshold for classifying the particle shape of coral sand. Particles with a flatness ratio < 0.5 are flaky coral sand, while those with a flatness ratio > 0.5 are blocky or rod-shaped coral sand. Therefore, the sieve openings of the flaky particle sorting system 3's flaky screening box 16 are strip-shaped. The number of flaky screening boxes 16 is the same as the number of target particle size screening boxes 15. In this embodiment, the sieve opening length of the flaky screening box 16 is equal to the sieve opening width. Twice the size of the target particle size, each sheet-like screening box 16 performs sheet-like screening of sample particles in different target particle size ranges. The sieve aperture of each sheet-like screening box 16 is the same as the upper limit of the corresponding target particle size range. Specifically, when i is 1, the sieve aperture length of the sieve of the i-th sheet-like screening box 16 is the same as the sieve aperture of the sieve of the upper screening box 14. When i is 2 to n, the sieve aperture length of the sieve of the i-th sheet-like screening box 16 is the same as the sieve aperture of the (i-1)-th target particle size screening box 15. i is the sequence number, i ranges from 1 to n.

[0045] exist Figure 1 The two sheet-like screening boxes 16 shown in the diagram of the sheet-like particle sorting system 3 are used to indicate the positional connection and do not imply that there are only two sheet-like screening boxes 16. In fact, the sheet-like particle sorting system 3 may include multiple screening boxes of different shapes depending on the target particle size range to be screened. The arrangement of the sieve holes on the sieve screen of the sheet-like particle sorting system 3 must comply with the requirements of "Technical Requirements and Inspection of Test Sieves Part 2: Metal Perforated Plate Test Sieve" (GB / T 6003.2-2024).

[0046] Table 2 shows the sieve aperture sizes of the sieves in each of the sheet-like screening boxes 16 of an example sheet-like particle sorting system 3.

[0047]

[0048] When using the flake particle sorting system 3 for sieving, the screening machine 9 vibrates in both horizontal and vertical directions. Since the thickness of the flake coral sand is less than the width of the strip sieve holes, the flake sample particles from each of the flake screening boxes 16 except for the bottommost (i.e., the nth) flake screening box 16 fall into the collection area of ​​the next adjacent flake screening box 16. The flake sample particles from the bottommost flake screening box 16 fall into the collection area of ​​the adjacent block and rod screening boxes 18. The screening area of ​​each flake screening box 16 contains block and rod sample particles corresponding to the target particle size range.

[0049] In this embodiment, an elongation rate of 0.5 is used as a threshold to classify the particle shape of blocky and rod-shaped coral sand. The blocky and rod-shaped particle sorting system 4 has a double-layer round hole screen in the blocky and rod-shaped screening box 18. The screen of the blocky and rod-shaped screening box 18 includes an upper screen and a lower screen. The aperture of the lower screen is twice that of the upper screen. The aperture of the lower screen is the same as the aperture spacing of the upper screen. The aperture spacing of the lower screen is the same as the aperture of the upper screen. The apertures of the upper screen and the lower screen are staggered in the vertical direction. The distance H between the upper screen and the lower screen is the same as the aperture of the upper screen.

[0050] In this embodiment, the number of block and rod-shaped screening boxes 18 is the same as the number of target particle size screening boxes 15. Each block and rod-shaped screening box 18 performs block and rod-shaped screening on sample particles of different target particle size ranges. The sieve aperture of the upper screen of each block and rod-shaped screening box 18 is the same as the upper limit of the corresponding target particle size range. Specifically, when i is 1, the sieve aperture of the upper screen of the i-th block and rod-shaped screening box 18 is the same as the sieve aperture of the upper screening box 14. When i is 2 to n, the sieve aperture of the sieve of the i-th block and rod-shaped screening box 18 is the same as the sieve aperture of the (i-1)-th target particle size screening box 15.

[0051] exist Figure 1 The two block and rod-shaped screening boxes 18 shown in the block and rod-shaped particle sorting system 4 are used to indicate the positional connection relationship and do not mean that the block and rod-shaped particle sorting system 4 has only two block and rod-shaped screening boxes 18. The actual block and rod-shaped particle sorting system 4 may include multiple block and rod-shaped screening boxes 18.

[0052] Table 3 shows the sieve aperture diameter, upper and lower sieve mesh, and sieve spacing for various block and rod-shaped screening boxes 18.

[0053]

[0054] When using the block and rod particle sorting system 4 for sieving, the screening machine 9 vibrates in both horizontal and vertical directions. Rod-shaped coral sand, because its length is greater than the distance H between the upper and lower screens, is blocked during its descent by contacting the gaps between the screen openings of the lower screen. Under the vertical vibration, it returns to the upper screen, preventing clogging. Therefore, the screening areas of each block and rod screening box 18 contain rod-shaped sample particles corresponding to the target particle size range. Block-shaped coral sand, because its length is less than the distance H between the upper and lower screens, can freely pass through both screens and, under vibration, pass through them. Therefore, except for the bottommost block and rod screening box 18, the block-shaped sample particles from each of the other block and rod screening boxes 18 fall into the collection area of ​​the adjacent next-lower block and rod screening box 18. The block-shaped sample particles from the bottommost block and rod screening box 18 fall into the collection box 19.

[0055] In addition, the top of the upper screening box 14, each target particle size screening box 15, each sheet screening box 16, each block and rod screening box 18, and the collection box 19 are all provided with the same connecting groove 7 along the circumference. The bottom of the upper screening box 14, each target particle size screening box 15, each sheet screening box 16, each block and rod screening box 18, and the collection box 19 are all provided with the same connecting protrusion 6 along the circumference. The bottom outer edge of the top cover is also provided with the same connecting protrusion 6. The size and shape of the connecting protrusion 6 and the connecting groove 7 are adapted to each other. The adapted connection of the connecting protrusion 6 and the connecting groove 7 is used to ensure the circumferential stability of each sorting system.

[0056] The sorting system mounting bracket 1 includes a base 20, multiple vertical screws 13, and a crossbar 12. The base 20 is also provided with a connecting groove 7. The screws 13 are evenly distributed on both sides of the sorting system. The base 20 is provided with multiple connecting seats. The screws 13 are inserted into the connecting seats. The screws 13 are provided with connecting handles 11. The crossbar 12 is placed between two corresponding screws 13. The crossbar 12 is pressed tightly against the top cover. The two ends of the crossbar 12 are respectively inserted into the connecting handles 11 on the screws 13 on both sides. Then, the fixing nut 10 is tightened from the top of the screw 13 onto the connecting handle 11.

[0057] The sorting system mounting bracket 1 is connected to the screening machine 9 and each sorting system in the following way: The base 20 of the sorting system mounting bracket 1 is mounted and fixed on the vibration mechanism on the top of the screening machine 9. The connecting protrusion 6 at the bottom of the collection box 19 is adapted to the connecting groove 7 of the base 20. The vertical position of the connecting handle 11 is adjusted so that after the two ends of the crossbar 12 are inserted into the connecting handle 11 on the screws 13 on both sides, the crossbar 12 can be pressed on the top cover. The fixing nut 10 is tightened from the top of the screw 13 onto the connecting handle 11, so that the crossbar 12 is pressed tightly on the top cover, ensuring the vertical stability of each sorting system connected as a whole.

[0058] Valves 5 are provided on the side walls of the upper screening box 14 and each target particle size screening box 15. Valves 5 are also provided on the side walls of the screening areas of each sheet screening box 16 and each block and rod screening box 18. Each sheet screening box 16, each block and rod screening box 18, and each collection box 19 has an outlet. The outlets of the collection areas of each sheet screening box 16, each block and rod screening box 18, and each collection box 19 are connected to different sample collection boxes (spherical valves are used in this embodiment).

[0059] After the particle size separation system 2 has finished screening, the valves 5 of the screening areas of each target particle size screening box 15 and each sheet screening box 16 are opened. The valve 5 of the i-th target particle size screening box 15 and the valve 5 of the screening area of ​​the i-th sheet screening box 16 are connected to the guide pipe 8. The screening machine 9 is started. The coral sand particles of the particle size separation system 2 are transported to the sheet particle separation system 3 under the action of vibration and gravity, thereby transferring the sample particles in the i-th target particle size screening box 15 to the screening area of ​​the i-th sheet screening box 16, and continuing the screening of coral sand particles into sheet particles.

[0060] After the flaky particle sorting system 3 completes the screening, the valves 5 of the screening areas of each flaky screening box 16 and each block and rod screening box 18 are opened. The valve 5 of the i-th flaky screening box 16 is connected to the valve 5 of the screening area of ​​the i-th block and rod screening box 18 through the guide pipe 8. The screening machine 9 is started. The coral sand particles of the flaky particle sorting system 3 are transported to the block and rod particle sorting system 4 under the action of vibration and gravity, thereby transferring the sample particles in the i-th flaky screening box 16 to the screening area of ​​the i-th block and rod screening box 18, and the coral sand particles continue to be screened into block and rod particles.

[0061] After the sorting of each sorting system is completed, the collection areas of each sheet-shaped screening box 16, the screening and collection areas of each block and rod-shaped screening box 18, and the sample particles in the collection box 19 can be discharged into the sample collection box through the guide pipe 8. The above method can complete the sample collection without moving the screening box or the collection box 19, which is simple to operate and saves manpower.

[0062] This invention achieves efficient sorting of coral sand particles by using sieves of different sizes and shapes in combination. The device is not only suitable for dual sorting of coral sand by particle size and shape, but can also be used for sorting by particle size or shape by adjusting the sieve configuration. In addition, this invention can be extended to the shape sorting of other non-spherical particles such as mineral particles and ceramic particles by adjusting the size and shape of the sieve holes, providing an efficient and economical universal sorting solution for the field of materials science.

[0063] Example 2:

[0064] A dual screening method for coral sand particles based on particle size and shape, utilizing the dual sorting device for coral sand particles based on particle size and shape described in Example 1 above, includes the following steps:

[0065] The sample used in this embodiment is coral sand;

[0066] Step 1: Assemble the screening machine 9, the sorting system fixing bracket 1, the particle size sorting system 2, the flaky particle sorting system 3, and the block and rod particle sorting system 4. The top cover is set on the upper screening box 14 of the particle size sorting system 2 to ensure the circumferential stability of each sorting system connected as a whole. The crossbar 12 is pressed tightly onto the top cover by the fixing nut 10 to ensure the vertical stability of each sorting system connected as a whole.

[0067] Step 2: Load the coral sand into the upper screening box 14 of the particle size sorting system 2, start the screening machine 9 to perform bidirectional vibration in both horizontal and vertical directions, set the vibration time to minutes, and screen and sort the coral sand particles in the particle size sorting system 2. After the vibration is completed, coral sand particles with different target particle size ranges are sorted out. Among them, coral sand particles with a particle diameter larger than the maximum target particle size remain in the upper screening box 14, and coral sand particles with a particle diameter smaller than the minimum target particle size fall into the collection area of ​​the first plate screening box 16. Coral sand particles with different target particle size ranges remain in the corresponding target particle size screening box 15.

[0068] Step 3: Open the valves 5 of the screening areas of each target particle size screening box 15 and each sheet screening box 16, connect the valve 5 of the i-th target particle size screening box 15 to the valve 5 of the screening area of ​​the i-th sheet screening box 16 through the guide pipe 8, transfer the sample particles in the i-th target particle size screening box 15 to the screening area of ​​the i-th sheet screening box 16, after the transfer is completed, remove the guide pipe 8 and close the valves 5 of the screening areas of each target particle size screening box 15 and each sheet screening box 16.

[0069] Step 4: Start the screening machine 9 for bidirectional horizontal and vertical vibration, set the vibration time, and perform the first sorting of coral sand shape in the flaky particle sorting system 3. After the vibration is completed, the flaky sample particles from each of the flaky screening boxes 16 except the bottom flaky screening box 16 fall into the collection area of ​​the adjacent next-lower flaky screening box 16, and then fall into different sample collection boxes through the outlet of the collection area of ​​the adjacent next-lower flaky screening box 16; the flaky sample particles from the bottom flaky screening box 16 fall into the collection area of ​​the adjacent block and rod-shaped screening box 18, and then fall into the sample collection box through the outlet of the collection area of ​​the adjacent block and rod-shaped screening box 18; the screening areas of each flaky screening box 16 contain block and rod-shaped sample particles corresponding to the target particle size range.

[0070] Step 5: Open the valves 5 of the screening areas of each sheet-shaped screening box 16 and each block and rod-shaped screening box 18. Connect the valve 5 of the i-th sheet-shaped screening box 16 to the valve 5 of the screening area of ​​the i-th block and rod-shaped screening box 18 through the guide pipe 8. Transfer the sample particles in the i-th sheet-shaped screening box 16 to the screening area of ​​the i-th block and rod-shaped screening box 18. After the transfer is completed, remove the guide pipe 8 and close the valves 5 of the screening areas of each sheet-shaped screening box 16 and each block and rod-shaped screening box 18.

[0071] Step 6: Start the screening machine 9 for bidirectional horizontal and vertical vibration, set the vibration time, and perform a second screening and sorting of coral sand shape in the block and rod particle sorting system 4. After the vibration is completed, the block sample particles from each of the block and rod screening boxes 18 except the bottom block and rod screening box 18 fall into the collection area of ​​the next adjacent block and rod screening box 18, and fall into different sample collection boxes through the outlet of the collection area of ​​the next adjacent block and rod screening box 18; the block sample particles from the bottom block and rod screening box 18 fall into the collection box 19, and fall into the sample collection box through the outlet of the collection box 19; the screening area of ​​each block and rod screening box 18 contains rod sample particles corresponding to the target particle size range.

[0072] In addition, before sieving, the volume of sample particles in the upper screening box 14 of the particle size separation system 2 is 1 / 3 to 1 / 2 of the volume of the upper screening box 14, and the sieving time is set to 15 minutes to ensure thorough sieving.

[0073] After step 2, coral sand is added back to the upper screening box 14 for screening. Step 2 is repeated until the coral sand particles in each target particle size screening box 15 account for 1 / 3 to 1 / 2 of the volume of the target particle size screening box 15. Then step 3 is executed so that the volume of coral sand particles in each sheet screening box 16 of the transferred sheet particle sorting system 3 accounts for 1 / 3 to 1 / 2 of the volume of the corresponding sheet screening box 16. This ensures that the best sheet screening effect can be achieved when step 4 is executed, and guarantees thorough screening.

[0074] After step 4, coral sand is added back to the upper screening box 14 for screening. Steps 2 to 4 are repeated until the coral sand particles in each sheet screening box 16 occupy 1 / 3 to 1 / 2 of the volume of the sheet screening box 16. Then, step 5 is executed so that the volume of coral sand particles in each block and rod screening box 18 of the transferred block and rod particle sorting system 4 occupies 1 / 3 to 1 / 2 of the volume of the corresponding block and rod screening box 18. This ensures that the best sheet screening effect can be achieved when step 6 is executed, and guarantees thorough screening.

[0075] Furthermore, in this embodiment, the screening time is set to 15 minutes each time to ensure thorough screening. The valve 5 of the screening box collection area of ​​the flaky particle sorting system 3 and the block and rod particle sorting system 4, as well as the valve of the collection box 19, can always be opened and connected to the sample collection box through the guide pipe 8. This can ensure that the sample that has been screened is exported from the equipment in a timely manner, reducing the weight of the equipment.

[0076] It should be noted that the embodiments described in this utility model are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A dual sorting device for the size and shape of coral sand particles, comprising a screening machine (9), characterized in that, It also includes a particle size sorting system (2), a flake particle sorting system (3), and a block and rod particle sorting system (4) connected from top to bottom, as well as a sorting system fixing bracket (1) and multiple sample collection boxes. The particle size sorting system (2) is equipped with a top cover. The particle size sorting system (2), the flake particle sorting system (3), and the block and rod particle sorting system (4) are all set in the sorting system fixing bracket (1). The sorting system fixing bracket (1) is mounted on the vibration mechanism at the top of the screening machine (9). The flake particle sorting system (3) includes a particle size sorting system (2), a flake particle sorting system (3), and a block and rod particle sorting system (4) connected from top to bottom. Multiple sheet-shaped screening boxes (16) are connected, and each sheet-shaped screening box (16) is provided with an inclined guide plate (17). The outer periphery of the inclined guide plate (17) of each sheet-shaped screening box (16) is connected to the inner wall of the corresponding sheet-shaped screening box (16). The inclined guide plate (17) of each sheet-shaped screening box (16) divides the interior of the corresponding sheet-shaped screening box (16) into an upper collection area and a lower screening area. The side wall of the collection area of ​​each sheet-shaped screening box (16) is provided with an outlet. The outlet of each sheet-shaped screening box (16) is connected to different sample collection boxes through a guide pipe.

2. A dual sorting device for coral sand particle size and shape according to claim 1, wherein, The particle size sorting system (2) includes an upper screening box (14) and n target particle size screening boxes (15) connected from top to bottom. The top of the upper screening box (14) is connected to the top cover. The flake particle sorting system (3) includes n flake screening boxes (16) connected from top to bottom. The block and rod particle sorting system (4) includes n block and rod screening boxes (18) and a collection box (19) connected from top to bottom. The bottom of the lowest target particle size screening box (15) is connected to the top of the highest flake screening box (16). The bottom of the lowest flake screening box (16) is connected to the top of the highest block and rod screening box (18). The bottom of the lowest block and rod screening box (18) is connected to the top of the collection box (19).

3. A dual sorting device for both size and shape of coral sand particles as claimed in claim 2, wherein The bottom screens of the upper screening box (14) and each target particle size screening box (15) are all single-layer round hole screens, and the screen apertures of the upper screening box (14) and each target particle size screening box (15) decrease from top to bottom.

4. The dual sorting device for coral sand particle size and shape according to claim 2, wherein, The bottom of the sheet-shaped screening box (16) and the block and rod-shaped screening boxes (18) are all screens. Each block and rod-shaped screening box (18) is provided with an inclined guide plate (17). The outer periphery of the inclined guide plate (17) of each block and rod-shaped screening box (18) is connected to the inner wall of the corresponding block and rod-shaped screening box (18). The inclined guide plate (17) of each block and rod-shaped screening box (18) divides the interior of the corresponding block and rod-shaped screening box (18) into an upper collection area and a lower screening area. The side wall of the collection area of ​​each block and rod-shaped screening box (18) and the side wall of the collection box (19) are provided with an outlet. The collection area of ​​each block and rod-shaped screening box (18) and the outlet of the collection box (19) are connected to the sample collection box through a guide pipe.

5. A dual sorting device for coral sand particle size and shape according to claim 4, wherein, The sieve of the sheet-like screening box (16) has strip-shaped sieve holes. The length of the sieve hole of the sheet-like screening box (16) is twice the width of the sieve hole. When i is 1, the sieve hole length of the sieve of the i-th sheet-like screening box (16) is the same as the sieve hole diameter of the sieve of the upper screening box (14). When i is 2 to n, the sieve hole length of the sieve of the i-th sheet-like screening box (16) is the same as the sieve hole diameter of the (i-1)-th target particle size screening box (15). i is the serial number, and i takes values ​​from 1 to n.

6. The dual sorting device for coral sand particles based on particle size and shape according to claim 4, characterized in that, The screen of the block and rod screening box (18) includes an upper screen and a lower screen. Both the upper and lower screens are round hole screens. The aperture of the lower screen is twice that of the upper screen. The aperture of the lower screen is the same as the aperture spacing of the upper screen. The aperture spacing of the lower screen is the same as the aperture of the upper screen. The apertures of the upper screen and the lower screen are staggered in the vertical direction. When i is 1, the aperture of the upper screen of the i-th block and rod screening box (18) is the same as the aperture of the screen of the upper screening box (14). When i is 2 to n, the aperture of the upper screen of the i-th block and rod screening box (18) is the same as the aperture of the screen of the (i-1)-th target particle size screening box (15).

7. A dual sorting device for both size and shape of coral sand particles as claimed in claim 6, wherein The top of the upper screening box (14), each target particle size screening box (15), each sheet screening box (16), each block and rod screening box (18), and the collection box (19) are all provided with the same connecting groove (7) along the circumferential direction. The bottom of the upper screening box (14), each target particle size screening box (15), each sheet screening box (16), each block and rod screening box (18), and the collection box (19) are all provided with the same connecting protrusion (6) along the circumferential direction. The bottom of the top cover is also provided with the same connecting protrusion (6). The size and shape of the connecting protrusion (6) and the connecting groove (7) are adapted to each other. The side walls of the upper screening box (14) and each target particle size screening box (15) are all provided with valves (5). The side walls of the screening areas of each sheet screening box (16) and each block and rod screening box (18) are all provided with valves (5).

8. The apparatus according to any one of claims 1 to 7, wherein The sorting system mounting bracket (1) includes a base (20), multiple vertical screws (13), and a crossbar (12). The base (20) also has connecting grooves (7). The screws (13) are evenly distributed on both sides of the sorting system. The base (20) has multiple connecting seats, and the screws (13) are inserted into the connecting seats. Each screw (13) has a connecting handle (11). The crossbar (12) is positioned between two corresponding screws (13). The screen... The base (20) of the fixed bracket is mounted and fixed on the vibration mechanism on the top of the screening machine (9). The connecting protrusion (6) at the bottom of the collection box (19) is adapted to the connecting groove (7) of the base (20). The crossbar (12) is pressed on the top cover. The two ends of the crossbar (12) are respectively inserted into the connecting handles (11) on the screws (13) on both sides. The fixing nut (10) is tightened from the top of the screw (13) onto the connecting handle (11). The crossbar (12) is pressed tightly on the top cover.

9. The apparatus according to claim 8, wherein Before sieving, the volume of the sample particles in the upper screening box (14) of the particle size sorting system (2) is 1 / 3 to 1 / 2 of the volume of the upper screening box (14); Before sieving, the volume of sample particles in each sheet-like screening box (16) of the sheet-like particle sorting system (3) is 1 / 3 to 1 / 2 of the volume of the corresponding sheet-like screening box (16); Before sieving, the volume of sample particles in each block and rod screening box (18) of the block and rod particle sorting system (4) is 1 / 3 to 1 / 2 of the volume of the corresponding block and rod screening box (18).

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