Feed flushing device of coal dressing cyclone

Abstract

The invention relates to the technical field of raw coal flushing, and discloses a coal dressing cyclone feeding flushing device which comprises a supporting groove seat. The inclined cylinder screen A is rotationally connected to the interior of the supporting groove base, and an inclined cylinder screen B is rotationally connected to the exterior of the inclined cylinder screen A; connecting the driving mechanism; the spiral plate is fixedly connected to the interior of the inclined drum screen A; a flushing mechanism; the lifting plates are fixedly connected to the inner side of the inclined cylinder screen B in the circumferential direction and are distributed at equal intervals in the axial direction of the inclined cylinder screen B; and a coal grinding mechanism. The spiral plate can rotate along with the inclined cylinder screen A and push coarse clean coal, the coarse clean coal can be prevented from being accumulated in the inclined cylinder screen A through boosting of the spiral plate, uniform movement of the coarse clean coal can be ensured, the coarse clean coal which uniformly moves in the inclined cylinder screen A can be flushed step by step through the flushing spray head, and the cleaning efficiency is improved. And mud impurities, fine dust and soluble pollutants in the coarse clean coal are removed, so that the separation precision and long-term stable operation of the dense medium cyclone are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of raw coal washing technology, and more specifically, to a coal preparation hydrocyclone feed washing device. Background Technology

[0002] Based on the key issues of complex coal quality, the mainstream washing processes can be divided into three categories: gravity coal preparation, flotation, and special auxiliary processes. Among them, gravity coal preparation is the most widely used process. It is suitable for processing complex coal quality with coarse particle size and significant differences in density between coal and gangue, and is especially suitable for situations where "gangue is coarsely embedded but mixed in composition".

[0003] The core equipment in existing gravity coal preparation processes mainly includes jigs and heavy medium hydrocyclones. The core principle of a jig is to simulate the natural gravity separation environment through the periodic "upward-downward" motion of water flow, causing particles of different densities to stratify in the bed, ultimately separating high-density particles (heavy products) from low-density particles (light products). The core principle of a heavy medium hydrocyclone is to enhance the force differences experienced by particles of different densities in the heavy medium through a high-speed rotating flow field inside the hydrocyclone, ultimately achieving the separation of low-density particles (light products) from high-density particles (heavy products).

[0004] For complex coal with high coarse gangue content and high fine ash content, a combination process of "jigging machine (for coarse particles) + heavy medium hydrocyclone (for fine particles)" is often used to balance throughput and ash reduction. However, during the process of separating complex coal with high coarse gangue content and high fine ash content, the light product (coarse clean coal) discharged by the jigging machine may still contain muddy impurities, fine dust and some soluble pollutants. If the coarse clean coal is directly fed into the heavy medium hydrocyclone without treatment, these substances may block the internal flow channel of the heavy medium hydrocyclone or contaminate the heavy medium suspension, making it difficult to ensure the separation accuracy and long-term stable operation of the heavy medium hydrocyclone. Summary of the Invention

[0005] This invention provides a feeding and flushing device for a coal preparation hydrocyclone, which solves the technical problem in related technologies that if coarse and clean coal directly enters the heavy medium hydrocyclone, it will affect the separation accuracy of the heavy medium hydrocyclone.

[0006] This invention provides a coal preparation hydrocyclone feed flushing device, comprising: a support trough, positioned in the direction of the ground's center of gravity; an inclined cylindrical screen A, rotatably connected inside the support trough, with an inclined cylindrical screen B fixedly connected to the outside of the inclined cylindrical screen A; both the outer surfaces of the inclined cylindrical screen A and the inclined cylindrical screen B are provided with screen meshes, the mesh aperture of the inclined cylindrical screen A being smaller than that of the inclined cylindrical screen B; a connecting drive mechanism, positioned outside the inclined cylindrical screen A; a spiral plate, fixedly connected inside the inclined cylindrical screen A; a flushing mechanism, positioned inside the inclined cylindrical screen A and used for flushing coarse and fine coal; lifting plates, circumferentially fixedly connected to the inner side of the inclined cylindrical screen B and equidistantly distributed along the axial direction of the inclined cylindrical screen B, with one end of the lifting plate away from the inner side of the inclined cylindrical screen B bent; and a coal grinding mechanism, positioned inside the inclined cylindrical screen B and used for grinding clean coal.

[0007] Preferably, the support trough includes an inlet arc plate and an outlet arc plate disposed at both ends, and the internal space of the support trough is divided into a rinsing trough and a screening trough, and the bottom of the rinsing trough and the screening trough are respectively fixedly connected to a drainage hopper and a coal discharge hopper.

[0008] Preferably, the end of the feed arc plate near the inclined cylindrical screen A is located inside the inclined cylindrical screen A, the end of the discharge arc plate near the inclined cylindrical screen B is located outside the inclined cylindrical screen B, and the rinsing tank and the screening tank are located below the inclined cylindrical screen A and the inclined cylindrical screen B, respectively.

[0009] Preferably, the connecting drive mechanism includes two connecting rings fixedly connected to the inside of the rinsing tank and the screening tank, respectively, and two toothed rings fixedly connected to the outside of the inclined cylindrical screen A and the inclined cylindrical screen B, respectively. A connecting rod A is fixedly connected between the two connecting rings, and two rotating rods are rotatably connected between the two connecting rings. Two drive gears are fixedly connected to the outside of each of the two rotating rods, and both ends of the two rotating rods extend to the outside of the support slot and are equipped with drive motors.

[0010] Preferably, the two connecting rings are respectively sleeved on the outside of the inclined cylindrical screen A and the inclined cylindrical screen B. The two drive gears near the inclined cylindrical screen A and the two drive gears near the inclined cylindrical screen B are respectively meshed with the two toothed rings. Each drive gear is installed on the outside of the support groove.

[0011] Preferably, the rinsing mechanism includes a high-pressure water pump installed outside the support trough, the outlet of the high-pressure water pump is fixedly connected to a connecting water pipe extending into the interior of the inclined cylindrical screen A, and a rinsing nozzle is installed outside the connecting water pipe.

[0012] Preferably, when the lifting plate rotates with the inclined cylindrical screen B, it can throw clean coal away from the inclined cylindrical screen A.

[0013] Preferably, the coal grinding mechanism includes a connecting frame fixedly connected to the outside of the discharge arc plate, a connecting rod B rotatably connected between the connecting water pipe and the connecting frame, and a linkage component disposed outside the connecting rod B. A U-shaped rod is fixedly connected to the outside of the connecting rod B, and coal grinding rollers are rotatably connected to the outside of the U-shaped rod at equal intervals.

[0014] Preferably, the linkage includes a meshing gear fixedly connected to the end of the connecting rod A, the meshing gear meshing with a toothed ring near the inclined cylindrical screen B, a connecting disc fixedly connected to the outside of the meshing gear, a linkage pin fixedly connected to the outside of the connecting disc, a swing rod fixedly connected to the outside of the connecting rod, a linkage groove opened on the outside of the swing rod, and the linkage pin movably connected inside the linkage groove.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention employs a combination of an inclined cylindrical screen A and a spiral plate. By connecting a drive mechanism, the inclined cylindrical screen A is rotated, causing the spiral plate to rotate along with it and push the coarse and clean coal. The propulsion of the spiral plate can prevent the coarse and clean coal from accumulating inside the inclined cylindrical screen A and ensure the uniform movement of the coarse and clean coal. This allows the flushing nozzles to flush the uniformly moving coarse and clean coal inside the inclined cylindrical screen A in stages to remove muddy impurities, fine dust, and soluble pollutants contained in the coarse and clean coal, thereby ensuring the separation accuracy and long-term stable operation of the heavy medium cyclone separator.

[0017] 2. The present invention adopts the technical means of combining inclined cylindrical screen B and lifting plates. By connecting the drive mechanism, the inclined cylindrical screen B is rotated, so that the circumferentially and equally distributed lifting plates follow its rotation and throw clean coal. The gradual throwing of clean coal inside the inclined cylindrical screen B can accelerate the screening out of coal blocks that meet the feed particle size of the heavy medium cyclone separator.

[0018] 3. During the rotation of the inclined cylindrical screen A, the present invention can drive the coal grinding roller to rotate back and forth through the linkage, so that the coal grinding roller can crush the clean coal moving inside the inclined cylindrical screen B step by step. That is, while the clean coal inside the inclined cylindrical screen B is being screened step by step, coal lumps that do not meet the feed particle size of the heavy medium hydrocyclone can be crushed step by step to prevent the residual coarse coal lumps from clogging the feed pipe of the heavy medium hydrocyclone or destroying its internal rotating flow field. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3This is a schematic diagram of the support groove in the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the connecting drive mechanism in this invention;

[0023] Figure 5 This is a schematic diagram of the rinsing mechanism in this invention;

[0024] Figure 6 This is a schematic diagram of the coal grinding mechanism in this invention;

[0025] Figure 7 This is a top view of the inclined cylindrical sieve A in this invention;

[0026] Figure 8 This is a bottom view of the inclined cylindrical screen B in this invention.

[0027] In the diagram: 10. Support trough; 11. Feed arc plate; 12. Discharge arc plate; 13. Washing trough; 14. Screening trough; 15. Drainage hopper; 16. Coal discharge hopper; 20. Inclined cylindrical screen A; 30. Inclined cylindrical screen B; 40. Connecting drive mechanism; 41. Connecting ring; 42. Gear ring; 43. Connecting rod A; 44. Rotating rod; 45. Drive gear; 46. Drive motor; 50. Spiral plate; 60. Washing mechanism; 61. High-pressure water pump; 62. Connecting water pipe; 63. Washing nozzle; 70. Lifting plate; 80. Coal grinding mechanism; 81. Connecting frame; 82. Connecting rod B; 83. U-shaped rod; 84. Coal grinding roller; 85. Meshing gear; 86. Connecting disc; 87. Linkage pin; 88. Swinging rod; 89. Linkage trough. Detailed Implementation

[0028] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0029] like Figure 1 - Figure 2 As shown, this embodiment provides a coal preparation hydrocyclone feed flushing device, including a support trough 10, an inclined cylindrical screen A20, an inclined cylindrical screen B30, a connecting drive mechanism 40, a spiral plate 50, a flushing mechanism 60, a lifting plate 70, and a coal grinding mechanism 80.

[0030] Among them, the support groove 10 is set in the direction of the center of gravity on the ground surface, such as Figure 3As shown, the support trough 10 includes a feed arc plate 11 and a discharge arc plate 12 at both ends. The coarse coal discharged from the jig can enter the interior of the inclined cylindrical screen A20 through the feed arc plate 11, and the gangue discharged from the inclined cylindrical screen B30 can be discharged through the discharge arc plate 12. The end of the feed arc plate 11 near the inclined cylindrical screen A20 is located inside the inclined cylindrical screen A20, and the end of the discharge arc plate 12 near the inclined cylindrical screen B30 is located outside the inclined cylindrical screen B30. That is, the rotation of the inclined cylindrical screen A20 and the inclined cylindrical screen B30 is not affected by the feed arc plate 11 and the discharge arc plate 12.

[0031] The internal space of the support trough 10 is divided into a flushing trough 13 and a screening trough 14. The bottom of the flushing trough 13 and the screening trough 14 are respectively fixedly connected to a drainage hopper 15 and a coal discharge hopper 16. The flushing trough 13 and the screening trough 14 are located below the inclined cylindrical screen A20 and the inclined cylindrical screen B30, respectively. When the flushing mechanism 60 flushes the coarse and fine coal inside the inclined cylindrical screen A20, the wastewater screened out enters the flushing trough 13 and is discharged through the drainage hopper 15. When the inclined cylindrical screen B30 screens the clean coal, the coal blocks that meet the feed particle size of the heavy medium cyclone enter the screening trough 14 and are discharged through the coal discharge hopper 16.

[0032] The inclined cylindrical screen A20 is rotatably connected inside the support trough 10, and the inclined cylindrical screen B30 is fixedly connected to the outside of the inclined cylindrical screen A20. The outer surfaces of both the inclined cylindrical screen A20 and the inclined cylindrical screen B30 are equipped with screens. The screen aperture of the inclined cylindrical screen A20 is smaller than that of the inclined cylindrical screen B30. The inclined cylindrical screen A20 is mainly used to screen out muddy impurities, fine dust and soluble pollutants washed out, while the inclined cylindrical screen B30 is mainly used to screen out coal lumps that meet the feed particle size of the heavy medium cyclone separator.

[0033] The connecting drive mechanism 40 is located outside the inclined cylindrical screen A20, such as... Figure 4 As shown, the connecting drive mechanism 40 includes two connecting rings 41 that are fixedly connected inside the rinsing tank 13 and the screening tank 14, respectively, and two toothed rings 42 that are fixedly connected outside the inclined cylindrical screen A20 and the inclined cylindrical screen B30, respectively. The two connecting rings 41 are respectively sleeved on the outside of the inclined cylindrical screen A20 and the inclined cylindrical screen B30. A connecting rod A43 is fixedly connected between the two connecting rings 41. Two rotating rods 44 are rotatably connected between the two connecting rings 41. The two rotating rods 44 are located on both sides below the inclined cylindrical screen A20 and the inclined cylindrical screen B30, respectively, and maintain a symmetrical relationship.

[0034] Two drive gears 45 are fixedly connected to the outside of each of the two rotating rods 44. The two drive gears 45 near the inclined cylindrical screen A20 and the two drive gears 45 near the inclined cylindrical screen B30 are respectively meshed with two toothed rings 42. Both ends of the two rotating rods 44 extend to the outside of the support groove 10 and are equipped with drive motors 46. Each drive gear 45 is installed on the outside of the support groove 10. By synchronously starting the drive motors 46 at the ends of the two rotating rods 44, the inclined cylindrical screen A20 and the inclined cylindrical screen B30 can be rotated through the drive gears 45 and the toothed rings 42.

[0035] The spiral plate 50 is fixedly connected inside the inclined cylindrical screen A20. As the inclined cylindrical screen A20 rotates, the coarse and fine coal washed inside moves downwards due to its own gravity. Therefore, the spiral direction of the spiral plate 50 must satisfy the following: when rotating with the inclined cylindrical screen A20, it can push the coarse and fine coal downwards towards the inclined cylindrical screen B30. The propulsion of the spiral plate 50 can prevent the coarse and fine coal from accumulating inside the inclined cylindrical screen A20 and ensure the uniform movement of the coarse and fine coal. Figure 7 As shown, when the inclined cylindrical screens A20 and B30 rotate outward, the top-view rotation direction of the inclined cylindrical screen A20 is clockwise.

[0036] The washing mechanism 60 is located inside the inclined cylindrical screen A20 and is used to wash the coarse and fine coal, such as... Figure 5 As shown, the rinsing mechanism 60 includes a high-pressure water pump 61 installed outside the support trough 10. The outlet of the high-pressure water pump 61 is fixedly connected to a connecting water pipe 62 extending into the interior of the inclined cylindrical screen A20. A rinsing nozzle 63 is installed outside the connecting water pipe 62. When the inclined cylindrical screen A20 rotates outwards, a rinsing nozzle 63 is installed. Figure 7 Taking the clockwise rotation direction of the inclined cylindrical screen A20 as an example, the coarse and fine coal inside the inclined cylindrical screen A20 is mainly distributed on the lower left side, and the flushing nozzle 63 is facing the area of ​​coarse and fine coal. By starting the high-pressure water pump 61, the flushing nozzle 63 can flush the coarse and fine coal inside the inclined cylindrical screen A20.

[0037] The lifting plates 70 are circumferentially fixed to the inner side of the inclined cylindrical screen B30 and are equidistantly distributed along the axial direction of the inclined cylindrical screen B30. The end of the lifting plates 70 away from the inner side of the inclined cylindrical screen B30 is bent, and the bending direction of the end of the lifting plates 70 must meet the following requirements: When rotating with the inclined cylindrical screen B30, they can throw clean coal away from the inclined cylindrical screen A20. Figure 8 As shown, when the inclined cylindrical screens A20 and B30 rotate outwards, the upward rotation direction of the inclined cylindrical screen B30 is counterclockwise.

[0038] The coal grinding mechanism 80 is located inside the inclined cylindrical screen B30 and is used to crush clean coal, such as... Figure 6As shown, the coal grinding mechanism 80 includes a connecting frame 81 fixedly connected to the outside of the discharge arc plate 12, a connecting rod B82 rotatably connected between the connecting water pipe 62 and the connecting frame 81, and a linkage component disposed outside the connecting rod B82. A U-shaped rod 83 is fixedly connected to the outside of the connecting rod B82, and coal grinding rollers 84 are rotatably connected to the outside of the U-shaped rod 83 at equal intervals. When the inclined cylindrical screen B30 rotates outward, the coal grinding rollers 84 are rotatably connected to the outside of the U-shaped rod 83. Figure 8 Taking the counterclockwise rotation direction of the inclined cylindrical screen B30 as an example, the clean coal inside the inclined cylindrical screen B30 is mainly distributed on the right side below it, and the coal rolling roller 84 is located in the area of ​​clean coal. By driving the coal rolling roller 84 to rotate back and forth through the linkage, connecting rod B82 and U-shaped rod 83, the coal rolling roller 84 can be crushed on the clean coal inside the inclined cylindrical screen B30.

[0039] It is worth noting that the outer surface of the coal rolling roller 84 must meet the requirement of "selective action". For coal blocks with low hardness, it can crush them through the mechanical properties of the surface structure. For gangue with high hardness, it can achieve "not forcibly crushing when in contact and actively avoiding when under force" through the elastic deformation ability of the surface material, so as to avoid wear of the coal rolling roller 84 or overload of the inclined cylindrical screen B30.

[0040] The linkage includes a meshing gear 85 fixedly connected to the end of the connecting rod A43. The meshing gear 85 meshes with a toothed ring 42 near the inclined cylindrical screen B30. When the inclined cylindrical screen B30 rotates, it can drive the meshing gear 85 to rotate through the toothed ring 42. A connecting disc 86 is fixedly connected to the outside of the meshing gear 85. A linkage pin 87 is fixedly connected to the outside of the connecting disc 86. The meshing gear 85, the connecting disc 86, and the linkage pin 87 rotate synchronously. A swing rod 88 is fixedly connected to the outside of the connecting rod 82. A linkage groove 89 is opened on the outside of the swing rod 88. The linkage pin 87 is movably connected inside the linkage groove 89. When the linkage pin 87 rotates with the connecting disc 86, it can move inside the linkage groove 89 and drive the swing rod 88 to swing.

[0041] The specific working principle of this implementation is as follows: First, the coarse and fine coal discharged from the jig is put into the interior of the inclined cylindrical screen A20 through the feed arc plate 11. Then, the drive motor 46 at the ends of the two rotating rods 44 is started simultaneously, so that the drive gear 45 drives the gear ring 42 to rotate, thereby making the inclined cylindrical screen A20 and the inclined cylindrical screen B30 rotate outward synchronously (it is also possible to make the inclined cylindrical screen A20 and the inclined cylindrical screen B30 rotate inward synchronously, but the orientation of the flushing nozzle 63 and the position of the coal grinding roller 84 need to be adjusted accordingly). Taking the working process of the inclined cylindrical screen A20 and the inclined cylindrical screen B30 rotating outward synchronously as an example;

[0042] As the inclined cylindrical screen A20 rotates outward, the high-pressure water pump 61 is started. The spiral plate 50 will rotate with the inclined cylindrical screen A20 and push the coarse coal downward to approach the inclined cylindrical screen B30. The propulsion of the spiral plate 50 can prevent the coarse coal from accumulating inside the inclined cylindrical screen A20 and ensure the uniform movement of the coarse coal. This allows the flushing nozzle 63 to flush the coarse coal moving uniformly inside the inclined cylindrical screen A20 step by step to remove the mud impurities, fine dust and soluble pollutants contained in the coarse coal. The wastewater from the flushing screen enters the flushing tank 13 and is discharged through the drain hopper 15.

[0043] After the coarse coal is washed and screened by the washing mechanism 60 and the inclined cylindrical screen A20, the clean coal obtained enters the interior of the inclined cylindrical screen B30. As the inclined cylindrical screen A20 rotates outward, the circumferentially and equally spaced lifting plates 70 will rotate with the inclined cylindrical screen B30, throwing the moving clean coal inside the inclined cylindrical screen B30 step by step, accelerating the screening out of the coal blocks that meet the feed particle size of the heavy medium cyclone separator. The coal blocks that meet the feed particle size of the heavy medium cyclone separator enter the screening trough 14 and are discharged through the coal discharge hopper 16.

[0044] Meanwhile, as the inclined cylindrical screen A20 rotates outward, the gear ring 42 drives the meshing gear 85 to rotate, and the connecting plate 86 and the linkage pin 87 rotate synchronously. When the linkage pin 87 rotates with the connecting plate 86, it can move inside the linkage groove 89 and drive the swing rod 88 to swing, so that the coal grinding roller 84 can crush the clean coal moving inside the inclined cylindrical screen B30 step by step. That is, while the clean coal inside the inclined cylindrical screen B30 is being screened step by step, it can crush the coal blocks that do not meet the feed particle size of the heavy medium cyclone, so as to prevent the residual coarse coal blocks from clogging the feed pipe of the heavy medium cyclone or destroying its internal rotating flow field. Meanwhile, the harder gangue is discharged through the discharge arc plate 12.

[0045] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A coal spiral feed flushing device, characterized in that, Include: Support groove seat (10) is arranged in the direction of the center of gravity of the earth surface; Inclined cylinder screen A (20) is rotatably connected inside the support groove seat (10), the outside of the inclined cylinder screen A (20) is fixedly connected with inclined cylinder screen B (30), the outer surfaces of the inclined cylinder screen A (20) and the inclined cylinder screen B (30) are provided with screen meshes, the screen mesh aperture of the inclined cylinder screen A (20) is smaller than the screen mesh aperture of the inclined cylinder screen B (30); Connecting driving mechanism (40) is arranged outside the inclined cylinder screen A (20); Spiral plate (50) is fixedly connected inside the inclined cylinder screen A (20); Flushing mechanism (60) is arranged inside the inclined cylinder screen A (20) and is used for flushing raw and clean coal; Material lifting plate (70) is circumferentially fixedly connected to the inner side of the inclined cylinder screen B (30) and is equidistantly distributed along the axial direction of the inclined cylinder screen B (30), and the end of the material lifting plate (70) away from the inner side of the inclined cylinder screen B (30) is bent; Coal crushing mechanism (80) is arranged inside the inclined cylinder screen B (30) and is used for crushing clean coal.

2. The coal spiral feeding and flushing device according to claim 1, characterized in that, The support groove seat (10) comprises inlet arc plates (11) and outlet arc plates (12) arranged at two ends, the internal space of the support groove seat (10) is divided into a flushing groove (13) and a screening groove (14), and the bottoms of the flushing groove (13) and the screening groove (14) are fixedly connected with a water drain hopper (15) and a coal discharge hopper (16), respectively.

3. A coal spiral feed flushing device according to claim 2, wherein, The end of the inlet arc plate (11) close to the inclined cylinder screen A (20) is located inside the inclined cylinder screen A (20), the end of the outlet arc plate (12) close to the inclined cylinder screen B (30) is located outside the inclined cylinder screen B (30), and the flushing groove (13) and the screening groove (14) are located below the inclined cylinder screen A (20) and the inclined cylinder screen B (30), respectively.

4. The coal spiral feeding and flushing device according to claim 3, characterized in that, The connecting driving mechanism (40) comprises two connecting rings (41) fixedly connected inside the flushing groove (13) and the screening groove (14), respectively, two tooth rings (42) fixedly connected outside the inclined cylinder screen A (20) and the inclined cylinder screen B (30), respectively, a connecting rod A (43) fixedly connected between the two connecting rings (41), two rotating rods (44) rotatably connected between the two connecting rings (41), two driving gears (45) fixedly connected outside the two rotating rods (44), and driving motors (46) arranged at the two ends of the two rotating rods (44) and extending to the outside of the support groove seat (10).

5. A coal spiral feed flushing device according to claim 4, wherein, The two connecting rings (41) are sleeved outside the inclined cylinder screen A (20) and the inclined cylinder screen B (30), the two driving gears (45) close to the inclined cylinder screen A (20) and the two driving gears (45) close to the inclined cylinder screen B (30) are engaged with the two tooth rings (42), respectively, and each driving gear (45) is mounted outside the support groove seat (10).

6. A coal spiral feed flushing device according to claim 5, wherein, The flushing mechanism (60) comprises a high-pressure water pump (61) installed outside the support groove seat (10), an outlet of the high-pressure water pump (61) is fixedly connected with a connecting water pipe (62) extending to the inside of the inclined cylinder sieve A (20), and an external part of the connecting water pipe (62) is provided with a flushing nozzle (63).

7. A coal spiral feed flushing device according to claim 6, wherein, When the material lifting plate (70) rotates along with the inclined cylinder sieve B (30), the clean coal can be thrown away from the inclined cylinder sieve A (20).

8. A coal spiral feed flushing device according to claim 7, wherein, The coal rolling mechanism (80) comprises a connecting frame (81) fixedly connected outside the discharge arc plate (12), a connecting rod B (82) rotationally connected between the connecting water pipe (62) and the connecting frame (81), and a linkage arranged outside the connecting rod B (82), an external part of the connecting rod B (82) is fixedly connected with a U-shaped rod (83), and an external part of the U-shaped rod (83) is rotationally connected with coal rolling rollers (84) at equal intervals.

9. A coal spiral feed flush device according to claim 8, characterised in that, The linkage comprises an engagement gear (85) fixedly connected at an end of the connecting rod A (43), the engagement gear (85) is engaged with the gear ring (42) close to the inclined cylinder sieve B (30), an external part of the engagement gear (85) is fixedly connected with a connecting disc (86), an external part of the connecting disc (86) is fixedly connected with a linkage pin (87), an external part of the connecting rod (82) is fixedly connected with a swing rod (88), an external part of the swing rod (88) is provided with a linkage groove (89), and the linkage pin (87) is movably connected in the inside of the linkage groove (89).

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