An internal circulation enhanced gravity separation device

Abstract

The application belongs to the technical field of fine particle mineral separation, and particularly relates to an internal circulation reinforced gravity separation equipment, which comprises an inner cylinder and an outer cylinder, and a water cavity in the shape of a ring is formed between the inner cylinder and the outer cylinder; the equipment further comprises a feeding cylinder, the bottom end of the feeding cylinder is provided with a feeding pipe, and the bottom end of the feeding cylinder is provided with a ring-shaped flow guide cylinder; the inner cylinder comprises a conical cylinder and a cylindrical cylinder, a plurality of ring-shaped separation grooves are arranged in the cylindrical cylinder; a ring-shaped flow guide part is protrusively arranged on the outer wall of the flow guide cylinder, and the flow guide part is arranged in the inner part of the uppermost separation groove; a plurality of water distribution holes are uniformly distributed on the circumference of the separation groove, and a plurality of circulation holes are arranged on the circumference of the flow guide part. By changing the flow path of the material, the material is subjected to circulation separation, the residence time of the fine particles in the separation cavity is prolonged under the condition of ensuring continuous separation, the movement range of the particles with different densities in the separation area is increased, the separation precision of the fine particle minerals is effectively improved, and the separation efficiency of the fine particle minerals is improved.

Description

Technical Field

[0001] This invention belongs to the field of fine-grained mineral sorting technology, and in particular relates to an internal circulation enhanced gravity sorting device. Background Technology

[0002] Enhanced gravity separation equipment is a type of centrifugal separation equipment used for separating fine-grained minerals. It mainly relies on centrifugal force of up to 300G to accelerate the separation of minerals with density differences. Currently, it is widely used in the comprehensive utilization of metal ores, non-metal ores, coal, and solid waste.

[0003] The working principle of a conventional centrifuge is as follows: The double-layer centrifuge drum consists of inner and outer layers. The inner layer is a cone shape, similar to a washing machine spin-dry tub, welded from stainless steel and equipped with annular spacers. The inner cone wall has many small holes. The outer layer is also cone-shaped, forming a closed water jacket with the inner layer. The drive motor's transmission shaft is hollow. Pressurized water flows through the hollow shaft into the inner sleeve of the double-layer centrifuge drum and is sprayed through the small holes in the inner layer into the spacers, creating backwash water. The minerals to be separated enter the bottom of the double-layer centrifuge drum in slurry form from the top feed pipe. Under the action of high-speed centrifugal force, the slurry overflows from bottom to top along the inner cone. Heavy substances, such as single gold particles, settle in the spacers, while lighter substances slide upwards to the top of the double-layer centrifuge drum and are discharged through the tailings trough. Under the impact of the backwash water, heavier substances in the spacers settle to the bottom layer, while lighter substances are continuously replaced by newly entering heavy substances and removed from the spacers. After a period of time, the high-density minerals in the spacers are cleared out. This means completing a mineral processing step.

[0004] Density differences are fundamental to the separation of different mineral particles, and particle size also significantly affects particle separation in an enhanced gravity field, especially for finer particles. The lower limit for effective gravity separation is generally considered to be 75 μm or 45 μm, because at smaller particle sizes, resistance has a more significant impact on particle motion. Furthermore, the residence time of fine particles in the separator is crucial for improving separation efficiency. Generally, the acceleration time of particles in an enhanced gravity field is almost negligible. Under continuous separation conditions, the longer the residence time within the separation chamber, the more accurate the separation. Therefore, designing a well-designed separation chamber to increase the movement range of particles of different densities in the separation area can effectively improve the separation accuracy of fine minerals.

[0005] Currently, for the separation of fine-particle minerals, the separation effect is not accurate enough and the separation efficiency is too low because the residence time of fine particles in the separator is very short. Summary of the Invention

[0006] In view of the technical problems existing in the background art, the present invention provides an internal circulation enhanced gravity separation device, which extends the residence time of fine particles in the separation chamber while ensuring continuous separation, thereby effectively improving the separation accuracy of fine minerals.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0008] An internal circulation enhanced gravity sorting device includes a sorting cylinder connected and driven by a rotating device. The sorting cylinder includes an inner cylinder and an outer cylinder located outside the inner cylinder, forming an annular water cavity between the inner and outer cylinders. It also includes a feed cylinder located at the upper end of the sorting cylinder, with a feed pipe at its bottom end extending into the bottom of the inner cylinder. An annular guide cylinder is located at the bottom end of the feed cylinder. The inner cylinder includes a conical cylinder and a cylindrical cylinder, with several annular sorting grooves arranged inside the cylindrical cylinder. An annular guide portion protrudes from the outer wall of the guide cylinder, the shape of which matches the shape of the sorting grooves. The guide portion is located inside the uppermost sorting groove. Several water distribution holes are evenly distributed around the circumference of the sorting grooves, and several circulation holes are arranged around the circumference of the guide portion.

[0009] Optionally, the cross-section of the sorting trough is set to a trapezoidal shape, the sorting trough includes an inclined section and a vertical section, and the water distribution hole is located on the vertical section.

[0010] Optionally, the circulation hole is disposed on the inclined surface at the upper end of the guide section.

[0011] Optionally, a box is provided on the outside of the sorting cylinder, an annular partition is provided between the box and the outer cylinder, an inclined plate is arranged in the space between the partition and the box, and an overflow pipe is provided on the box.

[0012] Optionally, a spray pipe is provided on the outside of the feed pipe, and a plurality of spray nozzles are evenly distributed along the length of the spray pipe.

[0013] Optionally, a cylinder is provided on the outside of the box body, and several guide cylinders are provided around the outer circumference of the box body. Several sliding rods are provided at the bottom of the feed cylinder, and the sliding rods are slidably arranged close to the inner wall of the guide cylinders; the piston rod of the cylinder is connected to one of the sliding rods.

[0014] Optionally, a connecting block is fixed to the outside of the housing on the opposite side of cylinder one, and a positioning mechanism is provided at the upper end of the connecting block; a screen assembly is detachably provided on the inner wall of the feed cylinder, a notch is provided on the side of the feed cylinder near the positioning mechanism, a support rod is provided on one side of the screen assembly, the support rod extends from the notch and is hinged to a roller at its end; when cylinder one drives the feed cylinder to rise, the roller can reach the position of the positioning mechanism and be fixed by the positioning mechanism; after the positioning mechanism fixes the roller, when cylinder one rises, the screen assembly can be rotated around the roller to discharge slag.

[0015] Optionally, the positioning mechanism includes a second cylinder fixed to the upper end of the connecting block, an internal through hole in the connecting block, through which the telescopic shaft of the second cylinder passes and is connected to a plug-in cylinder, and an annular limiting block is provided on the upper part of the plug-in cylinder; when the roller moves upward, it can be limited by the limiting block; the second cylinder can drive the plug-in cylinder to move laterally so that both ends of the roller are inserted into the plug-in cylinder.

[0016] Optionally, the bottom end of the inner cylinder is provided with an installation hole, and a discharge device is provided on the installation hole. The discharge device includes a discharge pipe and baffles and cones provided at both ends of the discharge pipe. Several baffles are evenly distributed around the circumference of the baffles, and several discharge holes one and discharge holes two are evenly distributed at both ends of the upper end of the discharge pipe. The discharge pipe is slidably disposed in the installation hole, the baffles are located on the upper end face of the cone, and the cones are located on the lower end face of the cone. When water enters the water cavity, it can push the cones up to fit tightly against the lower end face of the cone, thereby closing the discharge device.

[0017] The present invention has the following advantages and beneficial effects:

[0018] I. In this invention, the inner cylindrical tube is equipped with several annular sorting troughs, which allow minerals to contact and rub against the sorting troughs during their movement, thus improving the sorting effect. At the same time, under the action of enhanced gravity, fine particles move from bottom to top in the sorting chamber to the sorting troughs, forming stratified material deposits according to density. The water distribution holes on the sorting troughs loosen the initially formed bed. Under the action of water pressure, lower density materials move sequentially from the lower sorting trough to the middle and upper sorting troughs, while relatively higher density materials settle in the trapezoidal sorting troughs, improving the sorting accuracy.

[0019] 2. The guide tube is located inside the uppermost sorting tank. Lower-density materials in the upper sorting tank come into contact with the guide tube during their upward movement. Unable to overcome centrifugal force and gravity, these materials eventually rise as overflow products and are discharged through the overflow pipe. The remaining material re-enters the sorting chamber through the circulation hole to continue sorting. By altering the material flow path, material circulation sorting is achieved. This extends the residence time of fine particles in the sorting chamber while ensuring continuous sorting, increasing the movement range of particles of different densities in the sorting area, effectively improving the sorting accuracy and efficiency of fine minerals. Attached Figure Description

[0020] Figure 1 This is a front view of the sorting device provided by the present invention;

[0021] Figure 2 Structural diagrams of the feed cylinder, feed pipe, and guide cylinder provided by the present invention;

[0022] Figure 3 The structural diagram of the inner cylinder provided by the present invention;

[0023] Figure 4 This is a structural diagram of the pressure ring provided by the present invention;

[0024] Figure 5 for Figure 4 A magnified view of a portion of point a;

[0025] Figure 6 A structural diagram of the discharge device provided by the present invention;

[0026] Figure 7 A structural diagram showing the material discharge device provided by the present invention installed in the inner cylinder mounting hole;

[0027] Figure 8 for Figure 7 A schematic diagram showing the state where the discharge device is blocked and no material is being discharged.

[0028] Figure 9 Another structural diagram of the discharge device provided by the present invention;

[0029] Figure 10 for Figure 9 A schematic diagram showing the state where the discharge device is blocked and no material is being discharged.

[0030] Figure 11 A schematic diagram illustrating the principle of continuous material selection using a sorting cylinder provided by the present invention;

[0031] Figure 12 A schematic diagram illustrating the principle of cleaning and discharging materials after the sorting cylinder finishes sorting, as provided by this invention.

[0032] Figure 13This is a schematic diagram of the feeding cylinder screen assembly for screening materials provided by the present invention;

[0033] Figure 14 for Figure 13 A magnified view of a section at point b in the middle;

[0034] Figure 15 A schematic diagram illustrating the upward movement of the feed cylinder screen assembly and the fixing of the positioning mechanism provided by the present invention;

[0035] Figure 16 A schematic diagram of the positioning mechanism provided by the present invention;

[0036] Figure 17 A schematic diagram illustrating the principle of the screen inlet assembly for slag discharge provided by this invention;

[0037] Figure 18 for Figure 17 A magnified view of a section at point c in the middle;

[0038] Icons: 1-Frame, 11-Inverter, 12-Motor, 13-Belt, 2-Cylinder 1, 21-Piston Rod, 22-Guide Block, 23-Slide Rod, 3-Box, 31-Guide Cylinder, 32-Connecting Block, 33-Overflow Pipe, 34-Baffle Plate, 4-Outer Cylinder, 4a-Water Chamber, 41-Pressure Ring, 411-Crimping Part, 412-Threaded Hole, 5-Inner Cylinder, 5a-Heavy Mineral Deposition Chamber, 51-Conical Cylinder, 52-Cylindrical Cylinder, 53-Mounting Hole, 54-Conical Hole, 55-Sorting Tank, 56-Beveled Part, 57-Vertical Part, 58-Water Distribution Hole, 59-Mounting Boss, 6-Guide Cylinder, 61-Inverted Cone, 62-Guide Part, 63-Drainage Part, 64-Circulation Hole, 7-Feed Cylinder, 7a- Sprayer inner cavity, 71-screen assembly, 711-track, 712-roller, 713-notch, 714-support rod, 715-roller, 716-elastic support pad, 72-feed pipe, 73-spray pipe, 74-spray head, 75-locking nut, 76-water inlet connector, 8-discharge device, 81-discharge pipe, 82-discharge hole two, 83-cone, 84-end bevel, 85-baffle, 86-discharge hole one, 87-stop bar, 88-cone sleeve, 9-rotary joint, 91-discharge port, 92-discharge valve, 93-water inlet pipe, 94-water inlet valve, 10-positioning mechanism, 101-cylinder two, 102-guide ring, 103-insertion sleeve, 104-limiting block, 105-locking screw. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] Example 1

[0042] like Figure 1 As shown, an internal circulation enhanced gravity sorting device includes components such as a sorting cylinder, a feeding cylinder 7, a housing 3, and a frame 1.

[0043] like Figure 1 As shown, a sorting cylinder is rotatably mounted on the frame 1 via bearings. The sorting cylinder is connected to a rotating device and driven to rotate. Specifically, the sorting cylinder includes an inner cylinder 5 and an outer cylinder 4 located outside the inner cylinder 5. The bottom end of the outer cylinder 4 is rotatably mounted on the frame 1 via bearings. The inner cylinder 5 and the outer cylinder 4 are coaxially arranged, and an annular water cavity 4a is formed between the inner cylinder 5 and the outer cylinder 4.

[0044] A housing 3 is mounted on the outer frame 1 of the outer cylinder 4. The housing 3 and the outer cylinder 4 are coaxially aligned, and an annular partition 34 is provided between the housing 3 and the outer cylinder 4. An inclined plate is arranged in the space between the partition 34 and the housing 3. Figure 1 (A dashed line is drawn in the middle) to facilitate material discharge from the overflow pipe 33. The internal cavity of the inner cylinder 5 is a heavy mineral deposition chamber 5a; the overflow pipe 33 is installed on the box body 3, and the overflow pipe 33 is located at the lowest point of the inclined plate. The baffle 34 and the box body 3 form an overflow channel. After the baffle 34 is installed, it can prevent overflow material from entering the cavity between the outer cylinder 4 and the baffle 34, accurately guide the overflow material to the inner cavity of the box body 3, and discharge it from the overflow pipe 33. When the machine is stopped, a small amount of material in the inner cylinder 5 may enter the water chamber 3a. It is generally believed that all high-density materials are in the inner cylinder 5.

[0045] like Figure 1 As shown, the bottom end of the outer cylinder 4 extends to the bottom side of the frame 1. A motor 12, a frequency converter 11, etc., are located on the right side of the frame 1. A pulley is connected to the drive shaft of the motor 12, and a pulley is also provided at the bottom end of the outer cylinder 4. The two are connected by a belt 13 for transmission. The inner cylinder 5 and the outer cylinder 4 rotate synchronously under the control of the motor 12.

[0046] like Figure 1 As shown, the bottom end of the outer cylinder 4 extends to the bottom side of the frame 1 and is connected to a rotary joint 9. The bottom end of the rotary joint is connected to a discharge port 91, and a discharge valve 92 is installed on the discharge port 91. A water inlet pipe 93 is also installed on one side of the discharge port 91, and a water inlet valve 94 is installed on the water inlet pipe 93. Water can be filled into the water chamber 4a through the water inlet valve 94, and the discharge function can be realized through the discharge valve 92.

[0047] like Figure 1 , Figure 2 As shown, a feed cylinder 7 is provided at the upper end of the sorting cylinder, and the feed cylinder 7 is located at the upper end of the housing 3. A feed pipe 72 is provided at the bottom end of the feed cylinder 7, and the feed pipe 72 extends into the bottom end of the inner cylinder 5; an annular guide cylinder 6 is provided at the bottom end of the feed cylinder 7.

[0048] like Figure 1-3 As shown, the inner cylinder 5 includes a conical cylinder 51 and a cylindrical cylinder 52. The interior of the cylindrical cylinder 52 has several layers of annular sorting grooves 55 arranged along its height. The outer wall of the guide cylinder 6 has an annular guide portion 62 protruding outwards, the shape of which matches the shape of the sorting grooves 55. The guide portion 62 is located inside the uppermost sorting groove 55 (e.g., ...). Figure 11 (As shown). The sorting tank 55 has several water distribution holes 58 evenly distributed around its circumference, with the holes 58 arranged vertically or tangentially (inclined). The guide section 62 has several circulation holes 64 around its circumference. Under normal circumstances, the diameter of the circulation holes 64 is larger than the diameter of the water distribution holes 58.

[0049] like Figure 3 As shown, an annular mounting boss 59 is provided at the upper end of the inner cylinder 5. The bottom end of the mounting boss 59 of the inner cylinder 5 is closely attached to the upper end face of the outer cylinder 4, and the upper outer wall of the outer cylinder 4 is threaded. Figure 4-5 The diagram shows the structure of the pressure ring 41. An annular pressing portion 411 extends from the inner side of the pressure ring 41. The pressing portion 411 of the pressure ring 41 presses tightly against the mounting boss 59 of the inner cylinder 5. An internal threaded hole 412 is provided on the inner wall of the pressure ring 41, and the pressure ring 41 is threadedly connected to the outer wall of the housing 3. The pressure ring 41 secures the inner cylinder 5 and the outer cylinder 4 together.

[0050] Sorting principle:

[0051] like Figure 1 , Figure 11 As shown, when the power is turned on, the drive motor 12 drives the sorting cylinder (outer cylinder 4, inner cylinder 5) at a certain speed to form an enhanced gravity field; the fine minerals to be sorted are prepared into a uniform slurry through the mixing tank and fed into the feed cylinder 7 at a certain feeding speed. The fine uniform slurry enters the sorting chamber of the high-speed rotating inner cylinder 5 through the feed pipe 72; under the action of enhanced gravity, the fine material moves from bottom to top in the inner cylinder 5 to the sorting tank 55, and forms stratified materials according to density in the three-layer sorting tank 55.

[0052] According to the test backwash water flow parameters, the inlet valve 94 is set, and the backwash water enters the rotary joint 9 through the inlet pipe 93, and then enters the water chamber 4a (the closed space between the inner cylinder 5 and the outer cylinder 4). Finally, the backwash water required for the loosening of the bed is formed from the water distribution hole 58 at the bottom of the 3-layer sorting tank 55. Under the action of the backwash water, the lower density material moves from the lower sorting tank 55 to the middle and upper sorting tanks 55 in sequence, while the higher density material settles in the sorting tank 55. The lower density material in the upper sorting tank 55 comes into contact with the guide tube 6 during the upward movement. The low density material that cannot overcome the centrifugal force and gravity eventually moves upward to the inner cavity of the box 3 (light mineral deposition chamber 3a). The lighter minerals become the overflow product and are discharged from the overflow pipe 33. The remaining material re-enters the sorting chamber of the inner cylinder 5 through the circulation hole 64 to continue the sorting.

[0053] By changing the flow path of the material, material circulation and sorting are achieved. While ensuring continuous sorting, the residence time of fine particles in the sorting chamber is extended, and the movement range of particles of different densities in the sorting area is increased, which effectively improves the sorting accuracy and efficiency of fine minerals.

[0054] Example 2

[0055] In this embodiment, the structure of the sorting trough 55 and the guide tube 6 is further defined.

[0056] like Figure 3 As shown, the cross-section of the sorting tank 55 is set in a trapezoidal shape. The sorting tank 55 includes an inclined part 56 and a vertical part 57. The water distribution hole 58 is located on the vertical part 57, which can flush away the deposited material in the sorting tank 55, ensure that the material is evenly dispersed, and improve the sorting effect.

[0057] like Figure 1 , 2 As shown, the guide cylinder 6 consists of an inverted cone section 61, a guide section 62, and a diversion section 63 from top to bottom. The diversion section 62 is trapezoidal in shape, consistent with the sorting trough 55. A circulation hole 64 is located on the upper inclined surface of the guide section 62. Because the circulation hole 64 is located on the upper inclined surface of the guide section 62, high-density materials can be circulated back to the bottom of the inner cylinder 5 for further sorting at the uppermost position of the material sorting process. This prevents materials from being discharged before complete sorting, further improving the sorting accuracy.

[0058] Reference Figure 11The guide section 62 is located inside the uppermost sorting tank 55. When the material reaches the uppermost sorting tank 55, it is blocked by the guide section 62, which slows down and changes the flow direction, thus fully agitating it. Then, the low-density material that cannot overcome centrifugal force and gravity is guided by the inverted cone section 61 and finally moves upward to the inner cavity of the box 3 (light mineral deposition chamber 3a). The remaining material enters the guide cylinder 6 through the circulation hole 64 on the inclined surface on the upper side of the guide section 62 and is circulated back to the bottom of the inner cylinder 5.

[0059] Example 3

[0060] like Figure 1 , Figure 2 As shown, a spray pipe 73 is provided on the outer side of the feed pipe 72, and several layers of spray nozzles 74 are evenly distributed along the length of the spray pipe 73. The spray pipe 73 is slidably mounted on the outer wall of the feed pipe 72, and a threaded section is provided at the bottom end of the feed pipe 72, on which a locking nut 75 is provided for fixing the spray pipe 73 to the feed pipe 72. The spray pipe 73 and the discharge pipe form a spray cavity 7a. A water inlet connector 76 is provided on the upper side of the spray pipe 73 for connecting an external water pipe. (Refer to...) Figure 2 The spray pipe 73 is located inside the guide tube 6, while the remaining lower part extends to the bottom of the guide tube 6.

[0061] After the set sorting time, the sorting ends, the water inlet valve 94 is closed, the feeding cylinder 7 stops feeding, and water is introduced into the water inlet connector 76. The material in the sorting tank 55 is loosened by the flushing water sprayed by the spray nozzle 74 and enters the bottom of the inner cylinder 5.

[0062] Due to the presence of the guide tube 6, when the nozzle 74 sprays water to unload the material in the sorting tank 55, the sorting tank 55 outside the guide tube 6 is a cleaning dead zone, and the material in this area is difficult to remove completely. Therefore, further design is needed.

[0063] like Figure 1 , Figure 11 and Figure 12 As shown, a cylinder 2 is mounted on the frame 1 outside the housing 3. A guide block 22 is fixed to the outer wall of the housing 3. The upper end of the cylinder 2 is positioned in the inner hole of the guide block 22, and the piston rod 21 of the cylinder 2 is slidably positioned in the inner hole of the guide block 22. Several guide cylinders 31 are arranged around the outer circumference of the housing 3, and several sliding rods 23 are arranged at the bottom end of the feed cylinder 7. The sliding rods 23 are slidably positioned close to the inner wall of the guide cylinders 31. The piston rod 21 of the cylinder 2 and one of the sliding rods 23 are fixedly connected. That is, the feed cylinder 7 and the housing 3 are not fixedly connected but are separable. When the cylinder 2 extends, it can drive the feed cylinder 7 to move upward relative to the housing 3.

[0064] like Figure 1 , Figure 11As shown, during sorting, cylinder 2 is not activated, and the bottom end of the feed cylinder 7 is positioned close to the top end of the housing 3. At this time, the feed pipe 72 is located at the bottom end of the inner cylinder 5. The guide section 62 of the guide cylinder 6 is positioned directly opposite the uppermost sorting trough 55.

[0065] like Figure 12 As shown, once sorting is complete and the material in the sorting tank 55 needs to be cleaned, first control the nozzle 74 to spray water onto several sorting tanks 55 below the bottom of the guide cylinder 6. After cleaning, cylinder 2 extends to control the guide cylinder 6 to move upwards. Figure 12 As shown, the guide tube 6 is moved away from the uppermost sorting tank 55, and the nozzle 74 also moves upward to clean the upper sorting tank 55.

[0066] Through the optimization of the above structure, the sorting trough 55 in the dead corner of the outer side of the guide tube 6 can be thoroughly cleaned while achieving cyclic sorting through the guide tube 6, thus ensuring the cleaning efficiency of the material.

[0067] Example 4

[0068] In this embodiment, a screen assembly 71 is provided inside the feed cylinder 7, and its structure is optimized.

[0069] like Figure 1 , Figure 2 , Figure 13-18 As shown, a connecting block 32 is fixed on the outside of the housing 3 on the opposite side of cylinder 2, and a positioning mechanism 10 is provided on the upper end of the connecting block 32; a screen assembly 71 is detachably provided on the inner wall of the feed cylinder 7, a notch 713 is provided on the side of the feed cylinder 7 near the positioning mechanism 10, a support rod 714 is provided on one side of the screen assembly 71, and the support rod 714 extends out from the notch 713 and is hinged to a roller 715 at its end.

[0070] like Figure 13 As shown, the positioning mechanism 10 is located directly above the roller 715, which slides close to the inner wall of the connecting block 32, and is in the sorting state at this time. Figure 15 As shown, when cylinder 2 drives the feed cylinder 7 to rise, the roller 715 can reach the position of the positioning mechanism 10 and be fixed by the positioning mechanism 10. At this time, the guide cylinder 6 moves upward away from the uppermost sorting tank 55 and is in the dead corner position of the cleaning sorting tank 55. Figure 17 As shown, when the positioning mechanism 10 fixes the roller 715, the cylinder 2 continues to rise, which enables the screen assembly 71 to rotate around the roller 715 to discharge slag. At this time, the material in the sorting tank 55 has been completely removed, and the large particles filtered out of the screen are automatically unloaded.

[0071] This invention uses cylinder 2 to move the guide tube 6 and nozzle 74 upwards, achieving cleaning of dead corners. Simultaneously, it can also trigger the screen assembly 71 to flip and unload material, greatly simplifying the structure of the sorting device and achieving multi-functional integration. Furthermore, the sorting, sorted material unloading, and large particle material unloading processes are performed sequentially without interfering with each other.

[0072] Furthermore, tracks 712 are respectively provided on the inner walls of both sides of the feed cylinder 7, and several rollers 711 are respectively provided on both sides of the screen assembly 71, the rollers 711 being connected to the tracks 712. Figure 13 As shown, during sorting, the screen assembly 71 is placed on the track 712 via rollers 711. During feeding, large particles are filtered through the screen assembly 71, while small particles enter the inner cylinder 5 through the feed pipe 72.

[0073] In this invention, the positioning mechanism 10 is further designed. For example... Figure 13-18 As shown, the positioning mechanism 10 includes a second cylinder 101 fixed to the upper end of the connecting block 32. The connecting block 32 has an internal through hole through which the telescopic shaft of the second cylinder 101 passes and is connected to a connector cylinder 103. An annular limiting block 104 extends from the upper part of the connector cylinder 103. A guide ring 102 is fixed to one side of the connecting block 32 by a locking screw 105. The connector cylinder 103 is slidably disposed within the guide ring 102 and cannot rotate. When the roller 715 moves upward, it can just be caught on the inner wall of the limiting block 104 and be limited by the limiting block 104. Then, the second cylinder 101 extends, driving the connector cylinder 103 to move laterally, thereby inserting both ends of the roller 715 into the connector cylinder 103. In other words, the positioning mechanism 10 has one connector cylinder 103 on each side of the roller 715, limiting the roller 715 through the two connector cylinders 103, allowing the roller 715 to be rotatably disposed inside the connector cylinder 103.

[0074] Reference Figure 18 An elastic support pad 716 is provided at the bottom of the notch 713, and the support rod 714 is set close to the elastic support pad 716. When the plug-in cylinder 103 and the roller 715 are connected, and the cylinder 2 continues to extend, the screen assembly 71 is limited. At this time, the feed cylinder 7 moves upward as a whole, so that the screen assembly 71 rotates around the roller 715 as the axis. During this period, the support rod 714 slides and changes position close to the elastic support pad 716, reducing the wear of the support rod 714. After reaching a certain flipping angle, the screen assembly 71 can automatically unload the material.

[0075] Example 5

[0076] like Figure 1 As shown, a discharge device 8 is provided at the bottom of the inner cylinder 5. The discharge device 8 is used to discharge the material inside the inner cylinder 5 into the water chamber 4a, and then discharge it through the discharge port 91.

[0077] like Figure 1 , 3 As shown, the bottom end of the inner cylinder 5 is provided with an installation hole 53, the bottom end of the installation hole 53 is provided with a tapered hole 54, and a discharge device 8 is provided on the installation hole 53.

[0078] like Figure 6-8 As shown, in one preferred embodiment, the discharge device 8 includes a discharge pipe 81 and baffles 85 and truncated cones 83 disposed at both ends of the discharge pipe 81. Several baffles 87 are evenly distributed around the circumference of the baffles 85. Several discharge holes 86 and 82 are evenly distributed at both ends of the upper end of the discharge pipe 81, respectively, and the discharge holes 86 and 82 are respectively connected to the discharge pipe 81. The discharge pipe 81 is slidably disposed within the mounting hole 53. A conical sleeve 88 is slidably disposed on the discharge pipe 81, located on the upper end face of the conical cylinder 51. The baffles 85 are located on the upper end face of the conical cylinder 51, and the truncated cone 83 is located on the lower end face of the conical cylinder 51. Both sides of the truncated cone 83 are inclined surfaces 84.

[0079] like Figure 8 As shown, when water enters the water chamber 4a, it can push the cone 83 to move upward and stick to the lower end face of the cone cylinder 51, thereby closing the discharge device 8 (the end inclined surface 84 is set to stick to the cone hole 54), preventing the washing water from entering the inner cylinder 5 and causing the material in the inner cylinder 5 to leak into the water chamber 4a before it has been sorted.

[0080] like Figure 7 As shown, when the material is discharged after sorting, the discharge device 8, due to its own weight, causes the cone 83 to move downwards, so that the stop bar 87 is tightly attached to the cone sleeve 88. At this time, the discharge hole 1 86 and the upper side of the cone sleeve 88 are flush. The cone sleeve 88 is tightly attached to the end face of the conical cylinder 51. At this time, the material inside the inner cylinder 5 enters the discharge pipe 81 through the discharge hole 1 86, and is discharged into the water chamber 4a through the discharge hole 2 82, and finally discharged through the discharge port 91. The design of the cone sleeve 88 enhances the sealing performance, but because the cone sleeve 88 has a certain height, although its inclined setting makes it easier to discharge, it cannot completely discharge the material.

[0081] like Figure 9 , Figure 10 As another preferred method, the design of the cone sleeve 88 is eliminated. When the stop bar 87 is close to the upper end face of the cone cylinder 51, the discharge hole 86 is just flush with the bottom end of the inner cylinder 5, so that the material can be completely discharged. However, after eliminating the cone sleeve 88, the sealing performance is relatively weak.

[0082] Since the water distribution hole 58 connects the water cavity 4a and the heavy mineral deposition cavity 5a, the material that may be discharged from the bottom of the water distribution hole 58 into the water cavity 4a is also a high-density material. It is the same as the material discharged from the discharge device 8 at the bottom of the inner cylinder 5, and is finally discharged from the discharge port 91 at the bottom.

[0083] Sorting principle:

[0084] The parameters of the frequency converter 11 are preset according to the test parameters, and then the power is turned on. The drive motor 12 drives the sorting cylinder (inner cylinder 5 and outer cylinder 4) at a certain speed to form an enhanced gravity field. The fine minerals to be sorted are filtered through the screen assembly 71, and the coarse particles are left on the screen to prevent them from entering the sorting equipment. The fine and uniform slurry enters the high-speed rotating inner cylinder 5 through the feed pipe 72. Under the action of enhanced gravity, the fine material moves from bottom to top in the inner cylinder 5 to the trapezoidal sorting tank 55, and forms stratified materials according to density in the three trapezoidal sorting tanks 55.

[0085] According to the test backwash water flow parameters, the inlet valve 94 is set, and the backwash water enters the water chamber 4a through the inlet pipe 93. Finally, the backwash water required for the loose bed is formed from the water distribution hole 58 at the bottom of the three-layer trapezoidal sorting tank 55. At the same time, the sorting chamber discharge device 8 moves upward under the action of the inlet water pressure and tightly combines with the outer contour of the bottom end of the inner cylinder 5 to ensure that the backwash water cannot enter the inner cylinder 5. Under the action of the backwash water, the lower density material moves from the lower trapezoidal sorting tank 55 to the middle and upper trapezoidal sorting tanks 55 in sequence, while the higher density material settles in the trapezoidal sorting tank 55. The lower density material located in the upper trapezoidal sorting tank 55 comes into contact with the guide tube 6 during the upward movement. The low density material that cannot overcome the centrifugal force and gravity eventually moves upward to become the overflow product and is discharged from the overflow pipe 33. The remaining material re-enters the inner cylinder 5 through the circulation hole 64 to continue the circulation and complete the sorting.

[0086] After the set sorting time, the water inlet valve 94 is closed to stop feeding, water is sprayed from the nozzle 74, and the sorting chamber discharge device 8 automatically opens as it descends. During this period, the control cylinder 101 rises to clean the sorting tank 55 in the dead corner. The material in the sorting tank 55 is loosened by the flushing water sprayed from the nozzle 74 and enters the bottom of the inner cylinder 5. It is then discharged through the discharge device 8 into the water chamber 4a and finally reaches the discharge valve 92 for discharge. After discharge, the operation is repeated in the same manner. After discharge, the cylinder 101 continues to rise to automatically flip and unload the screen assembly 71.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An internal circulation enhanced gravity sorting device, comprising a sorting cylinder, the sorting cylinder being connected and driven by a rotating device; the sorting cylinder comprising an inner cylinder and an outer cylinder disposed outside the inner cylinder, the inner cylinder and the outer cylinder forming an annular water cavity, characterized in that... : It also includes a feed cylinder located at the top of the sorting cylinder, with a feed pipe at the bottom end of the feed cylinder extending into the bottom end of the inner cylinder; and an annular guide cylinder at the bottom end of the feed cylinder. The inner cylinder includes a conical cylinder and a cylindrical cylinder. The cylindrical cylinder has several annular sorting grooves inside. The outer wall of the guide cylinder has an annular guide portion that protrudes outward. The shape of the guide portion is the same as the shape of the sorting groove. The guide portion is located inside the uppermost sorting groove. The sorting tank has a number of water distribution holes evenly distributed around its circumference, and the guide section has a number of circulation holes around its circumference. The cross-section of the sorting trough is set to a trapezoidal shape, and the sorting trough includes an inclined part and a vertical part, with the water distribution hole located on the vertical part; The circulation hole is located on the inclined surface at the upper end of the flow guide; A box is provided on the outside of the sorting cylinder, an annular partition is provided between the box and the outer cylinder, an inclined plate is arranged in the space between the partition and the box, and an overflow pipe is provided on the box.

2. The internal circulation enhanced gravity sorting device according to claim 1, characterized in that: A spray pipe is provided on the outside of the feed pipe, and several spray nozzles are evenly distributed along the length of the spray pipe.

3. The internal circulation enhanced gravity sorting device according to claim 2, characterized in that: A cylinder is installed on the outside of the box body, and several guide cylinders are arranged around the outer circumference of the box body. Several sliding rods are installed at the bottom of the feed cylinder, and the sliding rods are slidably arranged close to the inner wall of the guide cylinders. The piston rod of the cylinder is connected to one of the sliding rods.

4. The internal circulation enhanced gravity sorting device according to claim 3, characterized in that: A connecting block is fixed to the outside of the housing on the opposite side of the cylinder, and a positioning mechanism is provided at the upper end of the connecting block; a screen assembly is detachably provided on the inner wall of the feed cylinder, and a notch is provided on the side of the feed cylinder near the positioning mechanism. A support rod is provided on one side of the screen assembly, and the support rod extends out of the notch and is hinged to a roller at its end; when the cylinder drives the feed cylinder to rise, the roller can reach the position of the positioning mechanism and be fixed by the positioning mechanism; after the positioning mechanism fixes the roller, when the cylinder rises, the screen assembly can be rotated around the roller to discharge slag.

5. The internal circulation enhanced gravity sorting device according to claim 4, characterized in that: The positioning mechanism includes a second cylinder fixed to the upper end of the connecting block. The connecting block has an internal through hole through which the telescopic shaft of the second cylinder passes and is connected to a plug-in cylinder. An annular limiting block extends from the upper part of the plug-in cylinder. When the roller moves upward, it can be limited by the limiting block. The second cylinder can drive the plug-in cylinder to move laterally so that both ends of the roller are inserted into the plug-in cylinder.

6. The internal circulation enhanced gravity sorting device according to claim 1, characterized in that: The bottom end of the inner cylinder is provided with an installation hole, and a discharge device is provided on the installation hole. The discharge device includes a discharge pipe and baffles and cones provided at both ends of the discharge pipe. Several baffles are evenly distributed around the circumference of the baffles. Several discharge holes one and discharge holes two are evenly distributed at both ends of the upper end of the discharge pipe. The discharge pipe is slidably disposed in the installation hole. The baffles are located on the upper end face of the cone, and the cones are located on the lower end face of the cone. When water enters the water cavity, it can push the cones up to fit tightly against the lower end face of the cone, thereby closing the discharge device.

Images