A contour guide for gemstone orientation screening

Abstract

This utility model proposes a contour guide rail for gemstone orientation screening, comprising a contour guide rail and a guide trough. A vibratory feeder is smoothly connected to the feed end of the guide trough. One side of the guide trough extends along the gemstone conveying direction and has a mounting wall. The mounting wall has a mounting hole facing the guide trough, and a mounting component is movably installed in the mounting hole. The end face of the mounting component has an air nozzle facing the guide trough. The air nozzle is located on the outer periphery of the end face of the mounting component. The vertical height of the air nozzle relative to the bottom surface of the guide trough is adjusted by rotating the mounting component. The other side of the guide trough has a return trough so that gemstones blown away from the guide trough by the air nozzle fall into the return trough. The vertical distance between the air nozzle and the bottom surface of the guide trough is adjusted by rotating the mounting component, simplifying the overall structure and improving the ease of use of the equipment. The air nozzle is always located above the pavilion in the preset orientation, correcting gemstones with slightly off-center orientations and blowing gemstones with abnormal orientations to the return trough for re-conveyance, effectively improving the feeding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gemstone straightening and feeding technology, specifically to a contour guide rail for gemstone posture screening. Background Technology

[0002] Gemstones refer to polished diamonds. Diamonds are crystals formed under high pressure and high temperature deep within the Earth. They are composed of a single element, carbon and have a strong luster. As the hardest substance on Earth, diamonds have poor toughness and are easily broken under external force along the weakest direction of the crystal. During the vibration and transportation process, gemstones tend to stack. Due to the different postures of the gemstones, the sharp corners overlap, which can easily form high-frequency friction, causing scratches on the facets and chipping on the girdle, affecting the quality of the gemstone itself.

[0003] Traditional gemstone orientation screening devices typically screen gemstones by physically blocking their movement. However, these devices are not very adaptable to different gemstone shapes. For irregularly shaped gemstones or gemstones with slight size differences, problems such as jamming and wear can easily occur, which not only affects screening efficiency but may also damage the surface of the gemstone. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model proposes a contour guide rail for gemstone orientation screening, which solves the problems mentioned in the background technology and realizes gemstone orientation screening.

[0005] To achieve the above objectives, this utility model discloses a contour guide rail for gemstone posture screening, comprising a contour guide rail including a guide groove, a vibratory feeder smoothly connected to the feed end of the guide groove, an installation wall extending along the gemstone conveying direction on one side of the guide groove, an installation hole on the side of the installation wall facing the guide groove, an installation component movably installed in the installation hole, an air nozzle on the end face of the installation component facing the guide groove, the air nozzle being located on the outer periphery of the end face of the installation component, the vertical height of the air nozzle relative to the bottom surface of the guide groove being adjusted by rotating the installation component, and a return groove on the other side of the guide groove to allow gemstones blown away from the guide groove by the air nozzle to fall into the return groove.

[0006] Furthermore, the bottom of the contour guide rail is equipped with a guide rail vibration to facilitate the transport of gemstones in the guide trough and prevent gemstone stacking.

[0007] Furthermore, the vibratory feeder includes a guide spiral track, and the extension direction of the guide groove is tangent to the spiral direction of the guide spiral track, so that the gemstone continues the movement direction and trend on the guide spiral track and smoothly enters the guide groove from the discharge end of the guide spiral track.

[0008] Furthermore, the opening of the return trough is flush with the bottom surface of the guide trough.

[0009] Furthermore, multiple air nozzles are provided, and the air nozzles are spaced apart on the mounting wall.

[0010] Furthermore, the air inlet ends of the multiple air nozzles are each connected to an regulating valve that can individually adjust the airflow speed via independent pipelines.

[0011] Furthermore, the mounting component is cylindrical, and the outer periphery of the mounting hole is provided with a scale marking for indicating the height of the air nozzle.

[0012] Furthermore, the upper surface of the contour guide rail is provided with a fastening hole, which is connected to the mounting hole. A fastener is provided in the fastening hole, which penetrates the upper surface of the contour guide rail and abuts against the mounting component.

[0013] Furthermore, the gemstone includes a table and a pavilion. In a preset posture, the gemstone is positioned with the table facing down and the pavilion facing up on the guide trough.

[0014] Furthermore, the air nozzle is located above the pavilion in a preset posture.

[0015] In summary, the contour guide for gemstone orientation screening has the following beneficial effects:

[0016] (1) By rotating the mounting component, the vertical distance between the air nozzle and the bottom surface of the guide trough is adjusted, which simplifies the overall structure and improves the ease of use of the equipment.

[0017] (2) The air nozzle is always located above the pavilion in the preset posture, which corrects the slightly misaligned gemstones and blows the abnormally oriented gemstones to the return chute for re-transportation, effectively improving the feeding efficiency. Attached Figure Description

[0018] The present invention will be further described and explained below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the overall structure of the material guiding spiral track of this utility model;

[0021] Figure 3 This is a schematic diagram of the initial attitude adjustment area of ​​this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first support part and the second support part of this utility model;

[0023] Figure 5This is a schematic diagram of the attitude guidance area of ​​this utility model ①;

[0024] Figure 6 This is a schematic diagram of the posture guidance area of ​​this utility model ②;

[0025] Figure 7 This is a schematic diagram of the posture correction area of ​​this utility model;

[0026] Figure 8 This is a schematic diagram of the attitude stabilization region of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the gemstone preset posture conveying of this utility model;

[0028] Figure 10 This is a schematic diagram of the contour guide rail of this utility model;

[0029] Figure 11 This is a schematic diagram of the air nozzle structure of this utility model;

[0030] Figure 12 This is a schematic diagram of the gemstone structure of this utility model;

[0031] Reference numerals: 1. Vibratory feeder; 2. Contouring guide rail; 3. Base; 4. Circumferential sidewall; 5. Material guide spiral track; 6. Pusher blade; 7. Diverter trough; 8. Initial attitude adjustment zone; 9. Attitude guidance zone; 10. Attitude correction zone; 11. Attitude stabilization zone; 12. First support part; 13. Second support part; 14. Attitude guide groove; 15. Material guide trough; 16. Return trough; 17. Tabletop; 18. Mounting hole; 19. Mounting component; 20. Air nozzle; 21. Fastener; 22. Fastening hole; 23. Direct vibration guide; 24. Pavilion; 25. Mounting wall. Detailed Implementation

[0032] The technical solution of this utility model will be more clearly and completely explained below with reference to the accompanying drawings and through the description of the preferred embodiments of this utility model.

[0033] like Figure 1-12As shown, this utility model proposes a gemstone straightening and feeding device, including a vibratory feeder 1 and a contour guide rail 2. The vibratory feeder 1 includes a base 3 and a circumferential sidewall 4. The circumferential sidewall 4 is provided with a guide spiral track 5. The guide spiral track 5 starts from the junction of the base 3 and the circumferential sidewall 4 and spirals upwards circumferentially to the top of the circumferential sidewall 4. The width of the guide spiral track 5 gradually decreases as it spirals upwards to constrain the gemstone to move along the inclined track and gradually form a single-line conveying. The rear section of the guide spiral track 5 is provided with a posture adjustment area along the gemstone conveying direction to adjust the gemstone to a preset posture. The contour guide rail 2 includes a guide groove 15. The feed end of the 5 is smoothly connected to the vibratory feeder 1. One side of the guide trough 15 extends along the gemstone conveying direction and is provided with a mounting wall 25. The mounting wall 25 is provided with a mounting hole 18 on the side facing the guide trough 15. A mounting component 19 is movably installed in the mounting hole 18. The end face of the mounting component 19 is provided with an air nozzle 20 facing the side of the guide trough 15. The air nozzle 20 is located on the outer periphery of the end face of the mounting component 19. The vertical height of the air nozzle 20 relative to the bottom surface of the guide trough 15 is adjusted by rotating the mounting component 19. The other side of the guide trough 15 is provided with a return trough 16 so that the gemstones blown away from the guide trough 15 by the air nozzle 20 fall into the return trough 16.

[0034] The gemstone includes a table 17 and a pavilion 24. To ensure the accuracy of subsequent processing, it is necessary to define three postures of the gemstone during the conveying process: the preset posture refers to the standard stable state in which the gemstone is set with the table 17 facing downwards and the pavilion 24 facing upwards. This state can minimize the impact of positioning deviation on subsequent processing; unstable posture refers to the slight posture deviation caused by uneven force when some gemstones, especially multifaceted gemstones with sharp edges, come into contact with the inner wall of the conveying device at a relatively fast conveying speed. This manifests as an irregular state, and the deviation is relatively minor and not easily noticeable; abnormal posture is when the gemstone deviates significantly from the preset posture, specifically manifested as significant deviations such as tilting to the left or right. If these abnormal posture gemstones are not corrected or sorted in time, it will directly affect the stability of the subsequent processing flow.

[0035] The bottom of the vibratory feeder 1 is provided with a guide vertical vibration 23, which is in close contact with the bottom of the contour guide rail 2. The base 3 is provided with a pusher blade 6 in the middle. The pusher blade 6 works with the guide vertical vibration 23 to push the stacked gemstones to the entrance of the guide spiral track 5. After the stacked gemstones enter the guide spiral track 5, the gemstones rise along the inclined direction of the guide spiral track 5 and rotate at least four times in the guide spiral track 5.

[0036] The cross-section of the guide spiral track 5 is U-shaped, and the width of the groove gradually decreases from the starting point to the end. The rear section of the guide spiral track 5 is provided with a posture adjustment area, which includes a posture initial adjustment area 8, a posture guide area 9, a posture correction area 10 and a posture stabilization area 11 arranged sequentially along the gemstone conveying direction, so as to realize the single-line conveying of the gemstone and adjust the gemstone to a state where the platform 17 is downward and the pavilion 24 is upward.

[0037] The rear half of the guide spiral track 5 is provided with a diversion groove 7 before the attitude adjustment zone. Before entering the attitude initial adjustment zone 8, the gemstone will pass through the diversion groove 7 at least twice. The width of the guide spiral track 5 restricts the gemstone to be conveyed in a single row. When stacked gemstones pass through, excess gemstones exceeding the single row capacity will slide down from both sides through the diversion groove 7 and be conveyed again. The remaining gemstones are constrained to be conveyed in a single row, realizing a gradual transition from disordered stacking to orderly conveying along the guide spiral track 5.

[0038] like Figure 3 As shown, the bottom of the initial posture adjustment zone 8 is inclined at 30° towards the center of the guide spiral. The gemstones passing through the initial posture adjustment zone 8 move in the inclined direction, so that the gemstones are closely arranged along the conveying direction, reducing the gaps between the gemstones and achieving initial posture regularization. This further ensures that the gemstones maintain a single-row arrangement during the conveying process, avoiding side-by-side or stacking phenomena. At the same time, it prevents the gemstones from shifting outward or falling off during the conveying process due to centrifugal force and inertia, effectively improving the stability of the conveying.

[0039] like Figures 4 to 6 As shown, a first support portion 12 is provided on one side of the bottom of the attitude guide area 9, and a second support portion 13 is provided on the other side. The first support portion 12 is located on the side closer to the spiral center of the guide spiral track 5, and the second support portion 13 is located on the side away from the spiral center of the guide spiral track 5. The height of the second support portion 13 is lower than that of the first support portion 12. An attitude guide groove 14 is provided between the first support portion 12 and the second support portion 13. The bottom of the attitude guide groove 14 is flat and without inclination. The width of the upper surface of the first support portion 12 and the second support portion 13 gradually decreases along the gemstone conveying direction. The bottom of the attitude initial adjustment area 8 is inclined towards the spiral center of the guide spiral track 5. The gemstone moves in the inclined direction. That is, after passing through the attitude initial adjustment area 8, the gemstone enters the attitude guide area 9 and is located at the first support portion 12. Under the action of the height difference between the first support portion 12 and the second support portion 13, and the influence of the gemstone's own gravity, the gemstone is inclined towards the second support portion 13. The width of the attitude guide groove 14 is smaller than the outer diameter of the gemstone, forming a state in which it is tilted at the opening of the attitude guide groove 14 without sliding down.

[0040] like Figures 7 to 8 As shown, the bottom of the posture correction area 10 is provided with an inclined guide surface. One end of the guide surface is connected to the inner wall of the first support part 12, and the other end of the guide surface extends along the gemstone conveying direction and tends to be flat. Under the combined action of its own gravity and the inclination of the track, the gemstone generates a flipping torque, causing the gemstone to flip towards the position with the lowest center of gravity. By adjusting the vibration frequency of the guide material vibration 23 and controlling the inclination angle of the guide surface, the gemstone is flipped and the platform 17 is attached to the bottom of the posture correction area 10.

[0041] like Figure 9 As shown, the bottom of the posture stabilization zone 11 is horizontal, providing stable transport conditions for the gemstone. At the same time, the width of the posture stabilization zone 11 remains constant, which can accurately adapt to the size of the gemstone and ensure that the gemstone will not deviate due to the track being too wide or squeezed due to the track being too narrow when passing through. This effectively ensures that the gemstone is smoothly and accurately fed into the next process in the preset posture.

[0042] After the gemstone exits from the guide spiral track 5, it enters the contour guide rail 2. Due to the inertia of motion, the gemstone conveyed on the guide spiral track 5 needs to maintain directional continuity. The extension direction of the guide groove 15 is designed to be tangent to the spiral direction of the guide spiral track 5 to reduce the impact force caused by sudden changes in direction and avoid damage to the gemstone. In addition, the discharge end of the attitude stabilization zone 11 is smoothly connected to the feed end of the guide groove 15 to ensure that the gemstone continues its original motion trajectory on the guide spiral track 5 and is smoothly conveyed from the discharge end of the guide spiral track 5 to the feed end of the guide groove 15.

[0043] The bottom of the contour guide rail 2 is equipped with a guide rail vibration to facilitate the conveying of gemstones in the guide trough 15 and prevent gemstone stacking. A mounting wall 25 extends along the gemstone conveying direction on one side of the guide trough 15. The mounting wall 25 has a plurality of mounting holes 18 along its conveying direction facing the guide trough 15. The mounting holes 18 are spaced apart, and mounting members 19 are movably installed in each of the mounting holes 18. Each mounting member 19 has an air nozzle 20 facing the guide trough 15 on its end face; that is, there are multiple air nozzles 20. Air nozzles 20 are spaced apart on the mounting wall 25 along the gemstone conveying direction. The air nozzles 20 are located on the outer periphery of the end face of the mounting member 19. The mounting member 19 is cylindrical. When the mounting member 19 is rotated, the height position of the air nozzles 20 changes accordingly. The mounting wall 25 surrounding the outer periphery of the mounting hole 18 is provided with scale markings for indicating the height of the air nozzles 20, which facilitates quick adjustment of the air nozzles 20 to the preset height, so that the relative position of the air nozzles 20 and the pavilion 24 of the gemstone meets the process requirements and improves the equipment debugging efficiency.

[0044] The upper surface of the contour guide rail 2 is provided with a plurality of fastening holes 22, which correspond one-to-one with the mounting holes 18 and are interconnected. Fasteners 21 are installed in the fastening holes 22, and the fasteners 21 pass through the fastening holes 22. The lower end of the fasteners 21 extends into the interior of the mounting holes 18 and abuts against the mounting parts 19 installed in the mounting holes 18. By rotating the fasteners 21, the contour guide rail 2 and the mounting parts 19 are fixed, thereby fixing the vertical distance of the air nozzle 20 relative to the bottom surface of the guide groove 15.

[0045] The height of the airflow is adjusted by rotating the mounting component 19 according to the gemstone's type. Each air nozzle 20 has an air inlet connected to an independent regulating valve that can individually adjust the flow rate. The airflow of the air nozzles 20 at different positions is different, gradually increasing from the inlet to the outlet of the guide chute 15. When the gemstone is conveyed on the guide chute 15, the air nozzles 20 blow unstable gemstones into a preset posture, while blowing gemstones with sharp corners or abnormal postures away from the guide chute 15 and sending them to the return chute 16. Ultimately, the gemstone after passing through the guide chute 15 presents a preset posture with the platform 17 facing downwards and the pavilion 24 facing upwards. The air nozzle 20 is located above the pavilion 24 in the preset posture, which ensures that the airflow can effectively act on the gemstones with unstable or abnormal postures, and also prevents the gemstones in the preset posture from being blown away due to excessive height. The opening of the return trough 16 is flush with the bottom surface of the guide trough 15 to prevent the gemstones entering the return trough 16 from flowing back to the guide trough 15. The return trough 16 is connected to the vibrating plate 1, so that the gemstones with abnormal postures can return to the vibrating plate 1 through the return trough 16 and re-enter the sorting stage, thereby ensuring that the gemstones entering the subsequent processing process all meet the strict posture standards, effectively improving the overall processing efficiency and product quality.

[0046] Working principle: First, when the gemstones are fed into the vibratory plate 1, the pusher blade 6, in conjunction with the guide vertical vibration 23, pushes the stacked gemstones to the entrance of the guide spiral track 5. As the width of the guide spiral track 5 gradually decreases, the stacked gemstones are gradually dispersed. The stacked gemstones rotate at least four times along the inclined track. Due to space constraints, the excess gemstones slide down to both sides through the diversion channel 7 and re-enter the sorting stage. The remaining gemstones are constrained to be conveyed in an orderly manner.

[0047] The gemstones are conveyed in an orderly manner into the initial posture adjustment zone 8. The gemstones move closer to the spiral center of the guide spiral track 5, that is, when they enter the posture guidance zone 9, most of the gemstones are located on the first support part 12. Under the action of the gemstones' own weight and height difference, the gemstones tilt towards the second support part 13 and are placed at the opening of the posture guide groove 14 without falling down. After entering the posture correction zone 10, the gemstones flip towards the lowest center of gravity, so that the platform 17 is in contact with the bottom of the posture correction zone 10. After entering the posture stabilization zone 11, the posture correction zone 10 is in a horizontal state. At this time, most of the gemstones are conveyed to the contour guide rail 2 in a preset posture with the platform 17 facing upward and the pavilion part 24 facing downward.

[0048] The mounting component 19 is rotated according to the gemstone type to adjust the vertical distance of the air nozzle 20 relative to the bottom surface of the guide trough 15, thereby adjusting the airflow spray height. The airflow height is always above the pavilion 24 in the preset posture. The mounting component 19 is fixed by the fastener 21, thereby fixing the vertical distance of the air nozzle 20 relative to the bottom surface of the guide trough 15. By adjusting the regulating air valve, the airflow of the air nozzle 20 is gradually increased along the gemstone conveying direction, blowing gemstones with slightly off-center postures into the preset posture, while blowing gemstones with opposite sharp corners away from the guide trough 15 and sending them to the return trough 16 to re-enter the sorting stage. Finally, gemstones that present the preset posture enter the next stage after passing through the guide trough 15.

[0049] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A profiling guide for gemstone attitude screening, comprising a profiling guide (2), characterized in that, The contour guide rail (2) includes a guide groove (15), and a vibratory plate (1) is smoothly connected to the feed end of the guide groove (15). A mounting wall (25) extends along the gemstone conveying direction on one side of the guide groove (15). A mounting hole (18) is provided on the side of the mounting wall (25) facing the guide groove (15). A mounting component (19) is movably installed in the mounting hole (18). An air nozzle (20) is provided on the end face of the mounting component (19) facing the guide groove (15). The air nozzle (20) is located on the outer periphery of the end face of the mounting component (19). The vertical height of the air nozzle (20) relative to the bottom surface of the guide groove (15) is adjusted by rotating the mounting component (19). A return groove (16) is provided on the other side of the guide groove (15) so that the gemstone blown away from the guide groove (15) by the air nozzle (20) falls into the return groove (16).

2. A profiling guide for gemstone attitude screening according to claim 1, wherein, The bottom of the contour guide rail (2) is provided with a guide rail vibration to facilitate the transport of gemstones in the guide trough (15) and prevent gemstones from stacking.

3. A profiling guide for gemstone attitude screening according to claim 1, wherein, The vibratory feeder (1) includes a guide spiral track (5), and the extension direction of the guide groove (15) is tangent to the spiral direction of the guide spiral track (5), so that the gemstone continues the movement direction and trend on the guide spiral track (5) and smoothly enters the guide groove (15) from the discharge end of the guide spiral track (5).

4. A profiling track for gemstone attitude screening according to claim 1, wherein, The opening of the return trough (16) is flush with the bottom surface of the guide trough (15).

5. A profiling track for gemstone attitude screening according to claim 1, wherein, Multiple air nozzles (20) are provided, and the air nozzles (20) are spaced apart on the mounting wall (25).

6. A profiling track for gemstone attitude screening according to claim 5, wherein, Each of the multiple air nozzles (20) has an air inlet end connected to an regulating valve that can individually adjust the airflow speed via an independent pipeline.

7. A profiling guide for gemstone attitude screening according to claim 1, wherein, The mounting component (19) is cylindrical, and the outer periphery of the mounting hole (18) is provided with a scale marking for indicating the height of the air nozzle (20).

8. A profiling track for gemstone attitude screening according to claim 1, wherein, The upper surface of the contour guide rail (2) is provided with a fastening hole (22), which is connected to the mounting hole (18). A fastener (21) is provided in the fastening hole (22), which penetrates the upper surface of the contour guide rail (2) and abuts against the mounting part (19).

9. A profiling track for gemstone attitude screening according to claim 1, wherein, The gemstone includes a table (17) and a pavilion (24). In a preset posture, the gemstone is positioned on the guide trough (15) with the table (17) facing downwards and the pavilion (24) facing upwards.

10. A profiling guide for gemstone attitude screening according to claim 9, wherein, The air nozzle (20) is located above the pavilion (24) in a preset posture.

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