A dense medium cyclone and an underflow port structure thereof

Abstract

The application discloses a heavy medium cyclone and a bottom flow port structure thereof, and belongs to the technical field of coal preparation. The bottom flow port structure comprises a bottom flow port caliber adjusting device and an angle adjusting device. The bottom flow port caliber adjusting device comprises a driving device and a bottom flow port component. The driving device comprises a driving gear, a first reversible motor and a driven gear. The driven gear is rotationally connected to the angle adjusting device. The bottom flow port component comprises an adjusting sliding seat and a porous adjusting disc. A plurality of bottom flow holes with different diameters are arranged on the porous adjusting disc. The porous adjusting disc is slidably connected to the driven gear. A vertical arc-shaped sliding channel is arranged on one side of the adjusting sliding seat. The porous adjusting disc is slidably connected to the adjusting sliding seat. The bottom flow port structure is fixedly installed at the front end of the bottom flow port of the heavy medium cyclone. The diameter of the bottom flow port of the heavy medium cyclone cannot be adjusted according to the coal quality of raw coal, the separation efficiency is low, and the adaptability is poor.

Description

Technical Field

[0001] This invention relates to the field of coal preparation in coal mines, and more specifically, to a heavy medium cyclone and its underflow port structure. Background Technology

[0002] The equipment used to separate mineral particles in a heavy suspension is called a heavy media separator. Currently, the rotary media separators used in industrial production mainly rely on centrifugal force to enhance the separation process; these are called heavy media cyclones. Heavy media cyclones are a type of coal preparation equipment with a simple structure, no moving parts, and high separation efficiency. This equipment has long been widely used both domestically and internationally. This is because of its simple structure, large unit throughput, and high separation efficiency, making it suitable for processing difficult or extremely difficult-to-separate coals.

[0003] The separation efficiency of heavy medium cyclones is related to the quality of the raw coal and the diameter of its underflow orifice. A paper titled "Principle and Operational Analysis of Heavy Medium Cyclones" demonstrates that when the feed inlet and pressure remain constant and the underflow orifice diameter is increased, the actual separation density decreases under the same conditions, resulting in a corresponding decrease in clean coal yield; conversely, decreasing the underflow orifice diameter increases the actual separation density. When the raw coal quality is poor and higher separation accuracy is required, the underflow orifice diameter needs to be appropriately reduced; conversely, when the raw coal quality is poor and lower separation accuracy is required, the underflow orifice diameter needs to be appropriately increased. Since the quality of raw coal varies in different mines or even in different working faces within the same mine, the underflow orifice diameter of the heavy medium cyclone needs to be adjusted to improve coal preparation efficiency when separating raw coal of different qualities. However, existing heavy medium cyclones cannot adaptively adjust their underflow orifice diameter according to the different qualities of raw coal, making them unsuitable for separating raw coal of varying qualities and exhibiting poor adaptability. Therefore, in view of the above problems, the present invention proposes a heavy medium cyclone and its underflow port structure. Utility Model Content

[0004] Technical problems to be solved

[0005] This invention proposes a heavy medium cyclone and its underflow port structure, which can separate raw coal of different qualities by changing the diameter of the underflow port of the heavy medium cyclone. This solves the problems of the underflow port diameter in heavy medium cyclones not being able to be adjusted according to the raw coal quality, resulting in low separation efficiency and poor adaptability.

[0006] Technical solution

[0007] To achieve the above objectives, this invention proposes an underflow port structure for a heavy medium cyclone, comprising an underflow port structure, an underflow port diameter adjustment device, and an angle adjustment device. The underflow port diameter adjustment device includes a drive device and an underflow port assembly. The drive device includes a driving gear, a first forward / reverse motor, and a driven gear. The driving gear meshes with the driven gear and is fixedly mounted on the output end of the first forward / reverse motor. The driven gear is rotatably connected to the angle adjustment device along the axial direction of the heavy medium cyclone. The underflow port assembly includes an adjustment slide and a perforated adjustment disk. The perforated adjustment disk has multiple underflow holes of different diameters evenly distributed circumferentially. The perforated adjustment disk is slidably connected to the driven gear along the axial direction of the heavy medium cyclone. A vertical arc-shaped slide is provided on one side of the adjustment slide, and the perforated adjustment disk is slidably connected to the adjustment slide through the arc-shaped slide. The underflow port structure is fixedly mounted at the front end of the underflow port of the heavy medium cyclone.

[0008] Preferably, the system also includes a base, which comprises a support plate and feet, wherein multiple feet are provided and fixedly installed on the lower surface of the support plate.

[0009] Preferably, the foot support includes a top plate, a stud, a threaded tube, and a foot plate. The top plate is fixedly installed on the lower surface of the support plate. The stud is vertically arranged and axially rotatably connected to the top plate. The stud is threadedly connected inside the threaded tube. The foot plate is fixedly installed at the lower end of the threaded tube.

[0010] Preferably, the angle adjustment device includes a first support column, a second support column, a lifting device, and a telescopic rotating shaft. The first and second support columns are both vertically fixedly installed on the upper surface of the support plate. The first and second support columns are arranged opposite each other along the axial direction of the heavy medium cyclone. A first connecting block is fixedly connected to the top of the first support column and to the side opposite to the second support column. One end of the telescopic rotating shaft is rotatably connected to a first connecting lug, and the other end is rotatably connected to a second connecting lug. The first connecting lug is vertically hinged to the first connecting block. The second support column is a hollow column with a vertical sliding hole on the side opposite to the first support column. The top of the second support column... The lifting device, which is fixedly connected to a protective cover and the two are in communication, includes a worm gear, a worm wheel, a second forward and reverse motor, and a screw. The worm wheel is horizontally disposed inside the protective cover and is axially rotatably connected to the protective cover. The screw is axially rotatable inside the second support column. The lower surface of the worm wheel is coaxially and fixedly connected to the top end of the screw. The worm gear is fixedly connected to the output end of the second forward and reverse motor and meshes with the worm wheel. The second forward and reverse motor is fixedly connected to the second support column through a second mounting base. A lifting ring is threaded onto the body of the screw. A second connecting block is fixedly connected to the outside of the lifting ring. The second connecting block passes through a vertical sliding hole on the second support column and is hinged to the second connecting lug.

[0011] Preferably, half of the driven gear is toothless and semi-circular, and the driving gear meshes with the toothed portion of the driven gear.

[0012] Preferably, the porous adjusting disk is a semi-circular disk with a semi-circular groove in its middle having the same diameter as the semi-circular part of the driven gear. The semi-circular part of the driven gear is slidably connected in the semi-circular groove of the porous adjusting disk along the axial direction of the heavy medium cyclone separator. The lower end of the porous adjusting disk is arc-shaped.

[0013] Preferably, the porous regulating plate has a first underflow hole, a second underflow hole, and a third underflow hole. The first underflow hole, the second underflow hole, and the third underflow hole are all tapered holes and are evenly distributed around the periphery of the porous regulating plate. The diameters of the first underflow hole, the second underflow hole, and the third underflow hole are different at the ends away from the heavy medium cyclone and the same at the ends near the heavy medium cyclone. The diameters of the first underflow hole, the second underflow hole, and the third underflow hole at the ends near the heavy medium cyclone are the same as the underflow port diameter of the heavy medium cyclone. The first underflow hole, the second underflow hole, and the third underflow hole are all coaxially provided with the same tapered mounting groove at the ends near the heavy medium cyclone.

[0014] Preferably, it also includes a first slide block, which includes a first lower slide block and a first mounting base. The bottom surface of the first lower slide block is fixedly connected to the upper surface of the support plate. The upper surface of the first lower slide block is provided with an arc-shaped slide rail, and the center of the arc coincides with the hinge point of the first connecting block and the first connecting ear. The first mounting base is slidably connected to the upper surface of the first lower slide block.

[0015] Preferably, it also includes a second slide block, which includes a slider, a second slide block, and a baffle. The bottom surface of the second slide block is fixedly connected to the upper surface of the support plate. The upper surface of the second slide block is provided with an arc-shaped slide rail, and the center of the arc coincides with the hinge point of the first connecting block and the first connecting ear. The slider is slidably connected to the upper surface of the second slide block. The adjusting slide block is slidably connected to the upper surface of the slider along the axial direction of the heavy medium cyclone. The outer side of the adjusting slide block and the outer side of the slider are in the same vertical plane. The baffle is fixedly installed on the side of the second slide block near the heavy medium cyclone.

[0016] Preferably, it also includes a locking device, which includes a locking seat, a push plate, a first locking block, a second locking block, and a rotating handle. The locking seat is fixedly installed on the outer side of the second sliding seat, and an installation groove is provided on the upper inner side of the locking seat. Multiple rotating handles are arranged along the axial direction of the heavy medium cyclone. The rotating handles are threadedly connected to the locking seat by bolts, and the bolts pass through the locking seat and are rotatably connected to the push plate. The second locking block is fixedly installed on the outer side of the adjusting slide. The first locking block is fixedly installed on the side of the push plate near the slider and corresponds to the position of the second locking block. The opposite sides of the first locking block and the second locking block are both serrated.

[0017] A heavy medium cyclone further includes the underflow port structure of the above-mentioned heavy medium cyclone, an overflow pipe is fixedly installed at the overflow port end of the heavy medium cyclone and connected to the heavy medium cyclone, and a feed pipe is fixedly installed on the outer side of the heavy medium cyclone along its tangential direction and connected to the heavy medium cyclone.

[0018] The present invention has the following beneficial effects: The aperture of the corresponding underflow hole in the multi-hole regulating disc is determined according to the quality of the raw coal. Then, the second forward and reverse motor in the angle adjusting device is started. At this time, the telescopic shaft in the angle adjusting device rotates vertically around the hinge point of the first connecting ear and the first connecting block. The first forward and reverse motor is fixedly installed on the first mounting base, which is slidably connected to the upper surface of the first sliding base. The upper surface of the first sliding base is provided with an arc-shaped slide rail centered on the hinge point of the first connecting ear and the first connecting block. Therefore, when the telescopic shaft rotates, it drives the driven gear to rotate, which in turn drives the driving gear to rotate. The driving gear then drives the first forward and reverse motor to rotate concentrically. The adjusting slide rail is slidably connected to the sliding base along the axial direction of the heavy medium cyclone separator. Similarly, on the upper surface of the block, the slider drives the adjusting slide to rotate, so that there will be no jamming when adjusting the angle of the multi-hole adjusting plate, making the angle adjustment smoother. At the same time, the self-locking function of the worm gear prevents the angle of the multi-hole adjusting plate from changing. After the angle of the multi-hole adjusting plate is adjusted to be the same as the axis angle of the heavy medium cyclone, the first forward and reverse motor is started to drive the drive gear to rotate. The drive gear drives the driven gear to rotate. When the required underflow hole is aligned with the underflow port of the heavy medium cyclone, the handle is turned to release the locking device. Then, the multi-hole adjusting plate is manually pushed towards the underflow port of the heavy medium cyclone, so that the underflow port is inserted into the conical mounting groove corresponding to a certain underflow hole of the multi-hole adjusting plate. Then, the handle is turned in the opposite direction to lock the locking device again, completing the selection and installation of the underflow hole. This underflow orifice structure allows for free replacement of the underflow orifice and ensures smooth connection with the underflow orifice of the heavy medium cyclone. If an underflow orifice diameter other than these three is required, a multi-hole adjustment disc of other specifications can be customized for replacement. The operation is simple and convenient, and the axis angle of the underflow orifice can be adjusted according to needs, increasing the application range of the heavy medium cyclone and enabling it to adapt to the separation of various coal qualities, thereby improving the separation efficiency of raw coal. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a heavy medium cyclone and its underflow port structure according to the present invention;

[0020] Figure 2 This is a three-dimensional perspective view of the underflow port structure of a heavy medium cyclone and its underflow port structure according to the present invention, taken from the left front.

[0021] Figure 3 This is a three-dimensional schematic diagram of the bottom outlet structure of a heavy medium cyclone and its bottom outlet structure according to the present invention, from the left rear.

[0022] Figure 4 This is a right rear perspective three-dimensional schematic diagram of the underflow port structure of a heavy medium cyclone and its underflow port structure according to the present invention.

[0023] Figure 5This is a three-dimensional perspective view of the underflow port structure of a heavy medium cyclone and its underflow port structure according to the present invention, taken from the right front.

[0024] Figure 6 for Figure 5 Enlarged view of A;

[0025] Figure 7 This is a schematic diagram of the telescopic shaft structure of a heavy medium cyclone and its underflow port structure according to the present invention;

[0026] Figure 8 This is a schematic diagram of the angle adjustment device described in this invention;

[0027] Figure 9 This is a partial structural diagram of the angle adjustment device for a heavy medium cyclone and its underflow port structure according to the present invention.

[0028] Figure 10 This is a rear view of the porous regulating disk of a heavy medium cyclone and its underflow port structure according to the present invention.

[0029] Figure 11 for Figure 10 AA cross-section view;

[0030] Figure 12 This is a right view of a heavy medium cyclone and its underflow port structure according to the present invention;

[0031] Figure 13 This is a left view of a heavy medium cyclone and its underflow port structure according to the present invention;

[0032] Figure 14 This is a schematic diagram of the foot support structure of a heavy medium cyclone and its underflow port structure according to the present invention.

[0033] In the diagram: 1. Heavy medium cyclone; 101. Feed pipe; 102. Overflow pipe; 2. Underflow port assembly; 21. Adjusting slide; 22. Perforated adjusting disc; 221. First underflow port; 222. Second underflow port; 223. Third underflow port; 3. Base; 31. Support plate; 32. Foot support; 321. Top plate; 322. Stud; 323. Screw tube; 324. Foot plate; 4. First slide; 41. First lower slide; 42. First mounting base; 5. Second slide; 51. Slider; 52. Second lower slide; 53. Baffle; 6. Drive device; 61. First 62. Reverse-rotating motor; 63. Driven gear; 7. Angle adjustment device; 71. First support column; 72. Second support column; 73. First connecting block; 74. Telescopic rotating shaft; 741. First connecting ear; 742. Second connecting ear; 75. Second reverse-rotating motor; 76. Worm gear; 77. Worm wheel; 78. Protective cover; 79. Screw; 710. Second connecting block; 711. Lifting ring; 8. Second mounting base; 9. Locking device; 91. Locking seat; 92. Push plate; 93. First locking block; 94. Second locking block; 95. Rotary handle. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0035] This invention proposes a heavy medium cyclone and its underflow inlet structure, such as... Figure 1 As shown, the device includes a heavy medium cyclone separator 1 and an underflow port structure. The underflow port structure includes an underflow port diameter adjustment device, an angle adjustment device 7, a first slide 4, a second slide 5, and a base 3. The underflow port structure is located at the underflow port end of the heavy medium cyclone separator 1. An overflow pipe 102 is fixedly installed at the overflow port end of the heavy medium cyclone separator 1 and is connected to the heavy medium cyclone separator 1. An inlet pipe 101 is fixedly installed tangentially on the outer surface of the heavy medium cyclone separator 1 and is connected to the heavy medium cyclone separator 1. Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the base 3 includes a support plate 31 and feet 32, with multiple feet 32 ​​fixedly mounted on the lower surface of the support plate 31. Figure 7 , Figure 8 and Figure 9As shown, the angle adjustment device 7 includes a first support column 71, a second support column 72, a lifting device, and a telescopic rotating shaft 74. The first support column 71 and the second support column 72 are both vertically fixedly installed on the upper surface of the support plate 31. The first support column 71 and the second support column 72 are arranged opposite each other along the axial direction of the heavy medium cyclone separator 1. A first connecting block 73 is fixedly connected to the top of the first support column 71 and the side opposite to the second support column 72. One end of the telescopic rotating shaft 74 is rotatably connected to a first connecting ear 741, and the other end of the telescopic rotating shaft 74 is rotatably connected to a second connecting ear 742. The first connecting ear 741 is vertically hinged to the first connecting block 73. The second support column 72 is a hollow column with a vertical sliding hole on the side opposite to the first support column 71. The top of the second support column 72 is fixedly connected to... The device includes a protective cover 78 connected to the protective cover 78. The lifting device comprises a worm gear 76, a worm wheel 77, a second forward / reverse motor 75, and a screw 79. The worm wheel 77 is horizontally positioned inside the protective cover 78 and axially rotatably connected to it. The screw 79 axially rotates within the second support column 72. The lower surface of the worm wheel 77 is coaxially and fixedly connected to the top end of the screw 79. The worm gear 76 is fixedly connected to the output end of the second forward / reverse motor 75, meshing with the worm wheel 77. The second forward / reverse motor 75 is fixedly connected to the second support column 72 via a second mounting base 8. A lifting ring 711 is threaded onto the shaft of the screw 79. A second connecting block 710 is fixedly connected to the outer side of the lifting ring 711. The second connecting block 710 passes through a vertical sliding hole on the second support column 72 and is hinged to a second connecting lug 742. Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the underflow port diameter adjustment device includes a drive device 6 and an underflow port assembly 2. The drive device 6 includes a drive gear 62, a first forward and reverse motor 61, and a driven gear 63. Half of the driven gear 63 is toothless and semi-circular. The drive gear 62 meshes with the toothed portion of the driven gear 63. The drive gear 62 is fixedly installed at the output end of the first forward and reverse motor 61. The driven gear 63 is coaxially and fixedly connected to the telescopic shaft 74. The underflow port assembly 2 includes an adjustment slide 21 and a perforated adjustment disc 22. The perforated adjustment disc 22 is a semi-circular disc with a semi-circular groove in its middle that has the same diameter as the semi-circular portion of the driven gear 63. The semi-circular portion of the driven gear 63 is slidably connected to the semi-circular groove of the perforated adjustment disc 22 along the axial direction of the heavy medium cyclone separator 1. One side of the adjustment slide 21 has a vertical arc-shaped slide rail. The perforated adjustment disc 22 is slidably connected to the adjustment slide 21 through the arc-shaped slide rail. Figure 10 and Figure 11As shown, the porous regulating disk 22 has a first underflow hole 221, a second underflow hole 222, and a third underflow hole 223. All three holes are tapered and evenly distributed circumferentially along the porous regulating disk 22. The diameters of the holes at the ends away from the heavy medium cyclone 1 are different, while the diameters at the ends closer to the heavy medium cyclone 1 are the same. The diameter of the orifice at the end is the same as the diameter of the underflow orifice of the heavy medium cyclone 1. The first underflow orifice 221, the second underflow orifice 222, and the third underflow orifice 223 are all coaxially provided with the same conical mounting groove near the end of the heavy medium cyclone 1. This facilitates the connection between the underflow orifice of the heavy medium cyclone 1 and a certain underflow orifice on the perforated regulating plate 22. When the underflow orifice of the heavy medium cyclone 1 is inserted into the conical mounting groove on the perforated regulating plate 22, it can act as a limit, preventing the rotation of the perforated regulating plate 22 from causing relative displacement of the underflow orifices on the perforated regulating plate 22, thus affecting the coal preparation efficiency. Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the first slide 4 and the second slide 5 are both fixedly installed on the upper surface of the support plate 31 and are located on the left and right sides of the angle adjustment device 7, respectively. The first forward and reverse motor 61 is fixedly installed on the first slide 4. The adjusting slide 21 is slidably connected to the second slide 5 along the axial direction of the heavy medium cyclone 1. The lower end of the multi-hole adjusting plate 22 is set in an arc shape, which can increase the activity space at the lower end of the multi-hole adjusting plate 22 and prevent the multi-hole adjusting plate 22 from conflicting with the first slide 4 when rotating downward, thus affecting the rotation of the multi-hole adjusting plate 22.

[0036] like Figure 2 , Figure 3 and Figure 13 As shown, the first slide block 4 includes a first sliding block 41 and a first mounting base 42. The bottom surface of the first sliding block 41 is fixedly connected to the upper surface of the support plate 31. The upper surface of the first sliding block 41 is provided with an arc-shaped slide, and its arc center coincides with the hinge point of the first connecting block 73 and the first connecting ear 741. The first mounting base 42 is slidably connected to the upper surface of the first sliding block 41.

[0037] like Figure 4 , Figure 5 and Figure 12As shown, the second slide block 5 includes a slider 51, a second slide block 52, and a baffle 53. The bottom surface of the second slide block 52 is fixedly connected to the upper surface of the support plate 31. The upper surface of the second slide block 52 is provided with an arc-shaped slide rail, and its arc center coincides with the hinge point of the first connecting block 73 and the first connecting ear 741. The slider 51 is slidably connected to the upper surface of the second slide block 52. The adjusting slide block 21 is slidably connected to the upper surface of the slider 51 along the axial direction of the heavy medium cyclone 1. The outer side of the adjusting slide block 21 and the outer side of the slider 51 are in the same vertical plane. The baffle 53 is fixedly installed on the side of the second slide block 52 near the heavy medium cyclone 1.

[0038] like Figure 5 and Figure 6 As shown, it also includes a locking device 9, which includes a locking seat 91, a push plate 92, a first locking block 93, a second locking block 94, and a rotating handle 95. The locking seat 91 is fixedly installed on the outer side of the second sliding seat 52. An installation groove is provided on the upper inner side of the locking seat 91. Multiple rotating handles 95 are arranged along the axial direction of the heavy medium cyclone 1. The rotating handles 95 are threadedly connected to the locking seat 91 by bolts, and the bolts pass through the locking seat 91 and are rotatably connected to the push plate 92. The second locking block 94 is fixedly installed on the outer side of the adjusting slide 21. The first locking block 93 is fixedly installed on the side of the push plate 92 near the slider 51 and corresponds to the position of the second locking block 94. The opposite sides of the first locking block 93 and the second locking block 94 are both serrated, which can increase the friction between the two and make the adjusting slide 21 and the slider 51 more securely locked.

[0039] like Figure 14 As shown, the foot support 32 includes a top plate 321, a stud 322, a threaded tube 323, and a foot plate 324. The top plate 321 is fixedly installed on the lower surface of the support plate 31. The stud 322 is vertically arranged and axially rotatably connected to the top plate 321. The stud 322 is threadedly connected inside the threaded tube 323. The foot plate 324 is fixedly installed at the lower end of the threaded tube 323. This allows for adjustment of the height and level of the underflow outlet structure.

[0040] Using this invention, the underflow port structure is fixedly installed in the designed position according to the position and height of the heavy medium cyclone 1. The height and level of the underflow port structure are made to meet the design requirements by adjusting the foot support 32. Then, the diameter of the corresponding underflow hole in the multi-hole regulating plate 22 is determined according to the coal quality. Then, the second forward and reverse motor 75 is started. The second forward and reverse motor 75 drives the worm 76 to rotate, the worm 76 drives the worm wheel 77 to rotate, and the worm wheel 77 drives the screw 79 to rotate. At this time, the lifting ring 711, which is threaded to the screw 79, moves vertically up or down. The lifting ring 711 drives the second connecting block 710 to move vertically up and down. Since the second connecting block 710 and the second connecting lug 742 are connected... The telescopic shaft 74 is hinged, and one end of the telescopic shaft 74 rotatably connected to the second connecting ear 742 also moves vertically upward or downward. The other end of the telescopic shaft 74 is rotatably connected to the first connecting ear 741. The first connecting ear 741 is hinged to the first connecting block 73, and the first connecting block 73 is fixedly connected to the top of the first support column 71 and the side opposite to the second support column 72. Therefore, the telescopic shaft 74 rotates vertically about the hinge point of the first connecting ear 741 and the first connecting block 73. The first forward and reverse motor 61 is fixedly mounted on the first mounting base 42, and the first mounting base 42 is slidably connected to the upper surface of the first sliding base 41. The upper surface of the first sliding base 41 is provided with the first connecting ear 741 and the first connecting block 73 hinged to the first connecting ear 741 and the first connecting block 73. The hinge point of the first connecting block 73 is a circular arc-shaped slide. Therefore, when the telescopic shaft 74 rotates, the telescopic shaft 74 drives the driven gear 63 to rotate, the driven gear 63 drives the driving gear 62 to rotate, and the driving gear 62 drives the first forward and reverse motor 61 to rotate concentrically. The adjusting slide 21 is slidably connected to the upper surface of the slider 51 along the axial direction of the heavy medium cyclone separator 1. The movement principle of the slider 51 and the second sliding slide 52 is the same as that of the first mounting base 42 and the first sliding slide 41, and will not be elaborated here. The slider 51 will also drive the adjusting slide 21 to rotate. In this way, there will be no jamming when the multi-hole adjusting disc 22 is adjusted, making the angle adjustment smoother. Simultaneously, the self-locking function of the worm gear 77 and worm 76 is used to prevent changes in the angle of the multi-hole adjusting disc 22. After the angle of the multi-hole adjusting disc 22 is adjusted to be the same as the axis angle of the heavy medium cyclone 1, the first forward and reverse motor 61 is started to drive the drive gear 62 to rotate. The drive gear 62 drives the driven gear 63 to rotate. When the required underflow hole is aligned with the underflow port of the heavy medium cyclone 1, the handle 95 is turned to release the locking device 9. Then, the multi-hole adjusting disc 22 is manually pushed towards the underflow port of the heavy medium cyclone 1, so that the underflow port is inserted into the conical mounting groove corresponding to a certain underflow hole of the multi-hole adjusting disc 22. Then, the handle 95 is turned in the opposite direction to relock the locking device 9, completing the selection and installation of the underflow hole. Figure 10 and Figure 11As shown, the porous regulating plate 22 in the underflow port structure has three underflow holes. The outer hole diameter of the first underflow hole 221 is D1, the outer hole diameter of the second underflow hole 222 is D2, and the outer hole diameter of the third underflow hole 223 is D3. The inner hole diameters of the first underflow hole 221, the second underflow hole 222, and the third underflow hole 223 are all D. The diameter of the underflow port of the heavy medium cyclone 1 is also D. Therefore, the underflow holes can be freely replaced and can be smoothly connected to the underflow port of the heavy medium cyclone 1. If an underflow hole diameter other than these three is required, a porous regulating plate 22 of other specifications can be customized for replacement. The operation is simple and convenient, and the axis angle of the underflow holes can be adjusted according to the needs, which increases the application range of the heavy medium cyclone 1, making the heavy medium cyclone 1 adaptable to the separation of various coal qualities and improving the separation efficiency of raw coal.

[0041] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A bottom outlet structure of a dense medium cyclone, characterized by, The bottom flow port structure comprises a bottom flow port caliber adjusting device and an angle adjusting device (7), the bottom flow port caliber adjusting device comprises a driving device (6) and a bottom flow port assembly (2), the driving device (6) comprises a driving gear (62), a first forward-reverse motor (61) and a driven gear (63), the driving gear (62) is meshed with the driven gear (63), the driving gear (62) is fixedly installed on the output end of the first forward-reverse motor (61), and the driven gear (63) is rotatably connected to the angle adjusting device (7) along the axial direction of the dense medium cyclone (1); The bottom flow port assembly (2) comprises an adjusting sliding seat (21) and a porous adjusting disc (22), a plurality of bottom flow holes with different diameters are uniformly arranged on the porous adjusting disc (22) in the circumferential direction, the porous adjusting disc (22) is slidably connected to the driven gear (63) along the axial direction of the dense medium cyclone (1), one side of the adjusting sliding seat (21) is provided with a vertical arc-shaped sliding channel, the porous adjusting disc (22) is slidably connected to the adjusting sliding seat (21) through the arc-shaped sliding channel, and the bottom flow port structure is fixedly installed at the front end of the bottom flow port of the dense medium cyclone (1); The base (3) comprises a supporting plate (31) and a plurality of foot supports (32) fixedly installed on the lower surface of the supporting plate (31). The angle adjusting device (7) comprises a first supporting column (71), a second supporting column (72), a lifting device and a telescopic rotating shaft (74), the first supporting column (71) and the second supporting column (72) are both vertically fixedly installed on the upper surface of the supporting plate (31), the first supporting column (71) and the second supporting column (72) are oppositely arranged along the axial direction of the dense medium cyclone (1), the top end of the first supporting column (71) and the side opposite to the second supporting column (72) are fixedly connected with a first connecting block (73), one end of the telescopic rotating shaft (74) is rotatably connected with a first connecting lug (741), the other end of the telescopic rotating shaft (74) is rotatably connected with a second connecting lug (742), the first connecting lug (741) is vertically hinged with the first connecting block (73), the second supporting column (72) is a hollow column and a vertical sliding hole is formed in the side opposite to the first supporting column (71), the top end of the second supporting column (72) is fixedly connected with a protective cover (78) and they are communicated, the lifting device comprises a worm (76), a worm wheel (77), a second forward-reverse motor (75) and a screw rod (79), the worm wheel (77) is horizontally arranged in the protective cover (78) and is axially rotatably connected with the protective cover (78), the screw rod (79) is axially rotatable in the second supporting column (72), the lower surface of the worm wheel (77) is coaxially fixedly connected with the top end of the screw rod (79), the worm (76) is fixedly connected with the output end of the second forward-reverse motor (75), the worm (76) is engaged with the worm wheel (77), the second forward-reverse motor (75) is fixedly connected with the second supporting column (72) through a second mounting seat (8), the rod body of the screw rod (79) is threadedly connected with a lifting ring (711), the outer side of the lifting ring (711) is fixedly connected with a second connecting block (710), the second connecting block (710) passes through the vertical sliding hole in the second supporting column (72) and is hinged with the second connecting lug (742).

2. The underflow port structure of a dense medium cyclone according to claim 1, wherein, The foot prop (32) comprises a top plate (321), a stud (322), a screw pipe (323) and a foot plate (324), the top plate (321) is fixedly installed on the lower surface of the supporting plate (31), the stud (322) is vertically arranged and is axially rotatably connected with the top plate (321), the stud (322) is threadedly connected in the screw pipe (323), and the foot plate (324) is fixedly installed on the lower end of the screw pipe (323).

3. The underflow structure of a dense medium cyclone according to claim 1, wherein, Half of the driven gear (63) is not provided with teeth and is semicircular, and the driving gear (62) is engaged with the part of the driven gear (63) provided with teeth.

4. The underflow port structure of a dense medium cyclone according to claim 1, wherein, The porous adjusting disc (22) is a semicircular disc, and a semicircular groove with the same diameter as the semicircular part of the driven gear (63) is arranged in the middle of the porous adjusting disc (22), the semicircular part of the driven gear (63) is slidingly connected in the semicircular groove of the porous adjusting disc (22) along the axis direction of the dense medium cyclone (1), and the lower end of the porous adjusting disc (22) is arranged in a circular arc shape.

5. The underflow port structure of a dense medium cyclone according to claim 1, wherein, The first underflow hole (221), the second underflow hole (222) and the third underflow hole (223) are arranged on the porous adjusting disc (22), the first underflow hole (221), the second underflow hole (222) and the third underflow hole (223) are all tapered holes and are uniformly distributed along the circumference of the porous adjusting disc (22) in sequence, the diameters of the first underflow hole (221), the second underflow hole (222) and the third underflow hole (223) are different away from one end of the dense medium cyclone (1) and are the same close to one end of the dense medium cyclone (1), the diameters of the first underflow hole (221), the second underflow hole (222) and the third underflow hole (223) close to one end of the dense medium cyclone (1) are the same as the diameter of the underflow port of the dense medium cyclone (1), and the first underflow hole (221), the second underflow hole (222) and the third underflow hole (223) close to one end of the dense medium cyclone (1) are all coaxially provided with the same tapered installation groove.

6. The underflow port structure of a dense medium cyclone according to claim 1, wherein, The first sliding seat (4) is further included, the first sliding seat (4) comprises a first lower sliding seat (41) and a first mounting seat (42), the bottom surface of the first lower sliding seat (41) is fixedly connected with the upper surface of the support plate (31), the upper surface of the first lower sliding seat (41) is provided with an arc-shaped sliding way, and the arc center of the arc-shaped sliding way coincides with the hinge joint points of the first connecting block (73) and the first connecting lug (741), and the first mounting seat (42) is slidingly connected with the upper surface of the first lower sliding seat (41).

7. The underflow port structure of a dense medium cyclone according to claim 6 wherein, The second sliding seat (5) is further included, the second sliding seat (5) comprises a sliding block (51), a second lower sliding seat (52) and a baffle (53), the bottom surface of the second lower sliding seat (52) is fixedly connected with the upper surface of the support plate (31), the upper surface of the second lower sliding seat (52) is provided with an arc-shaped sliding way, and the arc center of the arc-shaped sliding way coincides with the hinge joint points of the first connecting block (73) and the first connecting lug (741), the sliding block (51) is slidingly connected with the upper surface of the second lower sliding seat (52), the adjusting sliding seat (21) is slidingly connected with the upper surface of the sliding block (51) along the axis direction of the dense medium cyclone (1), the outer side surface of the adjusting sliding seat (21) is in the same vertical plane as the outer side surface of the sliding block (51), and the baffle (53) is fixedly installed on the side of the second lower sliding seat (52) close to the dense medium cyclone (1).

8. The underflow port structure of a dense medium cyclone according to claim 7, wherein, Further comprising a locking device (9), the locking device (9) comprises a locking seat (91), a push plate (92), a first locking block (93), a second locking block (94) and a handle (95), the locking seat (91) is fixedly installed on the outer side of the second lower slide seat (52), the upper inner side of the locking seat (91) is provided with an installation groove, the handle (95) is provided with a plurality of along the axis direction of the dense medium cyclone (1), the handle (95) is threadedly connected with the locking seat (91) through a bolt and is rotationally connected with the push plate (92) through the bolt, the second locking block (94) is fixedly installed on the outer side of the adjusting slide seat (21), the first locking block (93) is fixedly installed on the side of the push plate (92) close to the slide block (51) and corresponds to the position of the second locking block (94), the opposite sides of the first locking block (93) and the second locking block (94) are provided with sawtooth shapes.

9. A dense medium cyclone characterised in that, Further comprising the underflow port structure of the dense medium cyclone according to any one of claims 1-8, the overflow port end of the dense medium cyclone (1) is fixedly provided with an overflow pipe (102) and is communicated with the dense medium cyclone (1), the outer side of the dense medium cyclone (1) is fixedly provided with a feeding pipe (101) along the tangential direction and is communicated with the dense medium cyclone (1).

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