Coal grinding system for coal slurry preparation

Abstract

This invention discloses a coal grinding system for coal slurry preparation. The grinding system includes a mixing box located on top of a base plate, a hopper on top of the mixing box, a feed valve at the bottom of the hopper, and a grinding box at the bottom of the feed valve. The grinding box has a grinding chamber, a first servo motor located at the top of the grinding chamber, a connecting block at the output end of the first servo motor, and fixed cylinders on both sides of the connecting block. The bottom of the grinding box has a discharge groove, a first transmission gear rotatably disposed within the discharge groove, a grinding disc disposed inside the first transmission gear, a second servo motor located at the bottom of the grinding box, and a driving chamber located on one side of the discharge groove and connected to it. The output end of the second servo motor extends into the driving chamber, and the second transmission gear is located within the driving chamber and connected to the output end of the second servo motor. The second transmission gear and the first transmission gear are connected in a driving relationship. This coal grinding system for coal slurry preparation can improve the homogeneity and fineness of coal-water slurry.

Description

Technical Field

[0001] This invention relates to the field of coal grinding technology, and more specifically to a coal grinding system for coal slurry preparation. Background Technology

[0002] Coal-water slurry is the main raw material for the ammonia synthesis process. The quality of coal-water slurry is particularly important for cost control in the ammonia synthesis process. Improving the quality of coal-water slurry is becoming increasingly important in industrial production. Currently, coal, water, and additives are usually directly added to a coal mill for co-grinding. Therefore, the coal particles in the output coal-water slurry are always unevenly sized and mixed with water and additives. The severe unevenness of coal particles makes it difficult to guarantee the quality of the mixed coal slurry. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a coal grinding system for preparing coal slurry that improves the homogeneity and fineness of coal-water slurry.

[0005] The coal pulverizing system for coal slurry preparation according to an embodiment of the present invention includes a bottom plate, a mixing box, a hopper, a feed valve, a grinding box, a first servo motor, a connecting block, a first transmission gear, a grinding disc, a second servo motor, and a second transmission gear. The mixing box is located on top of the bottom plate, the hopper is located on top of the mixing box, the feed valve is located at the bottom of the hopper, and the grinding box is located at the bottom of the feed valve. The grinding box has a grinding chamber. The first servo motor is located at the top of the grinding chamber, the connecting block is located at the output end of the first servo motor, and fixed cylinders are provided on both sides of the connecting block. The bottom of the grinding box has a groove. The first transmission gear is rotatably located in the groove. The grinding disc is located inside the first transmission gear. The second servo motor is located at the bottom of the grinding box. The grinding box has a driving chamber. The driving chamber is located on one side of the groove and the groove is connected. The output end of the second servo motor extends into the driving chamber. The second transmission gear is located in the driving chamber and connected to the output end of the second servo motor. The second transmission gear and the first transmission gear are connected in a driving connection.

[0006] The pre-stirring and pre-crushing of coal by a fixed cylinder driven by a first servo motor, and the fine grinding by a grinding disc driven by a second servo motor, effectively overcomes the defect of uneven coal particle size in traditional single-stage coal grinding, significantly improving the homogeneity and fineness of the coal-water slurry, thereby optimizing the raw material quality of the ammonia synthesis process. Simultaneously, the first and second servo motors are driven independently, and the meshing transmission of the first and second transmission gears makes the control of the grinding process more flexible and reliable, with a compact structure and high transmission efficiency.

[0007] In some embodiments, the bottom end of the feed valve extends into the interior of the grinding chamber.

[0008] In some embodiments, the coal grinding system for coal slurry preparation of the present invention further includes a first electric telescopic rod and a second pressure block, wherein the telescopic end of the first electric telescopic rod extends into the grinding chamber and is connected to the second pressure block.

[0009] In some embodiments, the coal pulverizing system for coal slurry preparation of the present invention further includes two first fixed boxes, a weighing sensor, a first pressure block, a weighing device, and a first discharge valve. The two first fixed boxes are disposed on the top of the mixing box. The first fixed box has an inner cavity. The weighing sensor is disposed in the inner cavity of the first fixed box. The first pressure block is disposed inside the first fixed box and above the weighing sensor. The top end of the first pressure block extends to the outside of the first fixed box. The weighing device is fixedly connected between the two first pressure blocks. The first discharge valve is disposed at the bottom of the weighing device. The bottom end of the first discharge valve extends into the interior of the mixing box.

[0010] In some embodiments, the coal pulverizing system for coal slurry preparation of the present invention further includes a fourth electric telescopic rod, a second fixed box, a third servo motor, a connecting ring, a fixed ring, a rotating shaft, a first worm gear, and a first worm wheel. The fourth electric telescopic rod is disposed on the top of the base plate. The second fixed box is disposed at the telescopic end of the fourth electric telescopic rod. The connecting ring is fixedly connected to one side of the second fixed box. One end of the connecting ring extends into the interior of the mixing box and is fixedly connected to the fixed ring. The rotating shaft is rotatably connected to one side of the second fixed box. One end of the rotating shaft extends into the outside of the second fixed box and is fixedly connected to a rotating column. One end of the rotating column extends into the interior of the mixing box. The first worm gear is rotatably disposed in the second fixed box. The output end of the third servo motor is fixedly connected to the top of the first worm gear. The first worm wheel is fixedly sleeved on the outside of the rotating shaft and is drively connected to the first worm gear. The fourth servo motor is fixedly connected to one side of the rotating column.

[0011] In some embodiments, the coal grinding system for coal slurry preparation of the present invention further includes a drive plate, a plurality of rotating rods, a plurality of insert blocks, a stirring blade, a second worm gear, a fourth worm wheel, a guide rod, a second bevel gear, and a first bevel gear. The rotating column has a receiving cavity inside, and the drive plate is slidably connected to the receiving cavity. The drive plate has an inner cavity, and the plurality of rotating rods are rotatably disposed at the bottom of the inner cavity of the drive plate. The plurality of insert blocks are disposed at the top of the drive plate, and the top of each rotating rod passes through the insert block and extends to the upper side of the rotating column. The stirring blade is disposed on the rotating rod, the second worm gear is rotatably disposed inside the drive plate, and the fourth worm wheel is sleeved on the rotating rod. The fourth worm wheel and the second worm gear are drively connected. The rotating column is located inside the receiving cavity. One side of the cavity has a drive groove, and the guide rod is rotatably disposed in the drive groove. A guide block is slidably connected to the outer side of the guide rod. A slider is provided inside the guide block and located outside the guide rod. Two annular cavities are slidably connected inside the slider. The second bevel gear is fixedly sleeved on the outer side of the guide rod. The top of the annular cavity extends to the top of the guide block and is fixedly connected to the bottom of the second bevel gear. Spline grooves are provided on both sides of the guide rod. Spline members are slidably connected inside the spline grooves. One end of the spline member extends to the outer side of the guide rod and is fixedly connected to the inner side of the annular cavity. The first bevel gear is sleeved on one end of the second worm gear. One end of the second worm gear extends into the drive groove. The first bevel gear and the second bevel gear mesh.

[0012] In some embodiments of the present invention, the coal grinding system for preparing coal slurry further includes an induction plate and a sensor. The induction plate is disposed on the outside of the rotating rod, and the sensor is fixedly connected to the bottom of the inner cavity of the drive rod and below the induction plate.

[0013] In some embodiments, the coal pulverizing system for coal slurry preparation of the present invention further includes a third worm, a second worm wheel, a fixed block, a connecting rod, a drive gear, a fourth worm wheel, and a pulley. The third worm is rotatably disposed in the drive groove. The second worm wheel is sleeved on the outside of the guide rod and is drively connected to the third worm. The fixed block is located inside the fixed ring and is fixedly connected to the outside of the rotating column. The connecting cover is rotatably disposed on one side of the fixed block. The drive gear is fixedly disposed on the outside of the connecting rod. The fourth worm wheel is fixedly disposed inside the fixed ring and cooperates with the drive gear. The connecting rod and the third worm are drively connected through the pulley.

[0014] In some embodiments, the coal grinding system for coal slurry preparation of the present invention further includes a sliding screw, a drive block, a fourth worm, and a third worm wheel. The sliding screw is rotatably disposed in the drive groove. The drive block is threadedly connected to the sliding screw. One end of the drive block is fixedly connected to one side of the guide block. One side of the guide block is fixedly connected to one side of the drive plate. The fourth worm is rotatably connected in the drive groove. The third worm wheel is fixedly sleeved on the outside of the sliding screw. The third worm wheel and the fourth worm are drively connected. One end of the fourth worm extends to the outside of the rotating column and is fixedly connected to the output end of the fourth servo motor.

[0015] In some embodiments, the coal pulverizing system for coal slurry preparation of the present invention further includes a second discharge valve, which is located at the bottom of the mixing tank. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of a portion of the guide rod of the present invention.

[0018] Figure 3 This is the invention Figure 1 A magnified structural diagram of point A in the middle.

[0019] Figure 4 This is the invention Figure 1 A magnified structural diagram at point B in the middle.

[0020] Figure 5 This is a schematic diagram of the internal structure of the rotating column of the present invention.

[0021] Figure label:

[0022] 100. Coal grinding system for coal slurry preparation; 1. Base plate; 2. Mixing box; 3. Hopper; 4. Feed valve; 5. Grinding box; 501. Grinding chamber; 502. Discharge trough; 503. Drive chamber; 6. First servo motor; 7. Connecting block; 8. Fixed cylinder; 9. First transmission gear; 10. Grinding disc; 11. Second servo motor; 12. Second transmission gear; 13. First electric telescopic rod; 14. Second pressure block; 15. First fixed box; 16. Weighing sensor; 17. First pressure block; 18. Weighing device; 19. First discharge valve; 20. Fourth electric telescopic rod; 21. Second fixed box; 22. Third servo motor; 23. Fixed ring; 24. Rotating shaft; 25. First worm gear; 26. First worm wheel; 27. Fourth servo motor; 28. Drive plate; 30. Storage cavity; 31. Rotating rod; 32. Insert block; 33. Stirring blade; 34. Second worm gear; 35. Fourth worm wheel; 36. Guide rod; 37. Rotating column; 38. Drive groove; 39. Guide block; 40. Slider; 41. Annular cavity; 42. Second bevel gear; 43. Spline groove; 44. Spline component; 45. First bevel gear; 46. Induction plate; 47. Sensor; 48. Second worm wheel; 49. Fixing block; 50. Connecting rod; 51. Drive gear; 52. Connecting ring; 53. Pulley; 54. Sliding screw; 55. Drive block; 56. Fourth worm gear; 57. Third worm wheel; 58. Second discharge valve. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] like Figures 1 to 5As shown, the coal pulverizing system 100 for coal slurry preparation in this embodiment of the invention includes a bottom plate 1, a mixing box 2, a hopper 3, a feed valve 4, a grinding box 5, a first servo motor 6, a connecting block 7, a first transmission gear 9, a grinding disc 10, a second servo motor 11, and a second transmission gear 12. The mixing box 2 is located on top of the bottom plate 1, the hopper 3 is located on top of the mixing box 2, the feed valve 4 is located at the bottom of the hopper 3, and the grinding box 5 is located at the bottom of the feed valve 4. The grinding box 5 has a grinding chamber 501. The first servo motor 6 is located at the top of the grinding chamber 501, and the connecting block 7 is located at the output end of the first servo motor 6. The grinding box 5 has fixed cylinders 8 on both sides, and a groove 502 at the bottom. The first transmission gear 9 is rotatably disposed in the groove 502. The grinding disc 10 is disposed inside the first transmission gear 9. The second servo motor 11 is disposed at the bottom of the grinding box 5. The grinding box 5 has a drive cavity 503, which is located on one side of the groove 502 and connected to the groove 502. The output end of the second servo motor 11 extends into the drive cavity 503. The second transmission gear 12 is located in the drive cavity 503 and is connected to the output end of the second servo motor 11. The second transmission gear 12 and the first transmission gear 9 are connected in a transmission manner.

[0025] Coal, water, and additives sequentially enter the grinding chamber 5 via a mixing box 2, a hopper 3, and a feed valve 4 located on top of the base plate 1. A first servo motor 6 is mounted on the top of the grinding chamber 5, with its output end connected to a connecting block 7. Fixed cylinders 8 are located on both sides of the connecting block 7. The first servo motor 6 drives the connecting block 7 and the fixed cylinders 8 to rotate within the grinding chamber 501, completing the pre-mixing and initial crushing of the materials. A discharge trough 502 is located at the bottom of the grinding chamber 5, within which a first transmission gear 9 is rotatably mounted. A grinding disc 10 is located inside the first transmission gear 9. A second servo motor 11 is also located at the bottom of the grinding chamber 5, with its output end extending into the drive chamber 503 of the grinding chamber 5. A second transmission gear 12, connected to the output end of the second servo motor 11, is located within the drive chamber 503. The second transmission gear 12 is connected to the first transmission gear 9 in a transmission connection. Driven by the second servo motor 11, the second transmission gear 12 drives the first transmission gear 9 to rotate, which in turn drives the grinding disc 10 to finely grind the pre-treated material, ultimately grinding it into a uniform coal-water slurry, which is then discharged through the outlet 502. The entire system achieves graded processing through the coordinated operation of pre-stirring and fine grinding.

[0026] The pre-stirring and pre-crushing of coal by the fixed cylinder 8 driven by the first servo motor 6, and the fine grinding by the grinding disc 10 driven by the second servo motor 11, effectively overcomes the defect of uneven coal particle size in traditional single-stage coal grinding, significantly improving the homogeneity and fineness of the coal-water slurry, thereby optimizing the raw material quality of the ammonia synthesis process. Simultaneously, the independent driving of the first servo motor 6 and the second servo motor 11, combined with the meshing transmission of the first transmission gear 9 and the second transmission gear 12, makes the control of the grinding process more flexible and reliable, with a compact structure and high transmission efficiency.

[0027] In some embodiments, the bottom end of the feed valve 4 extends into the interior of the grinding chamber 5.

[0028] The bottom of the feed valve 4 extends into the interior of the grinding chamber 5. After passing through the feed valve 4, the coal, water and additives do not fall directly into the grinding chamber 501 from the top opening of the grinding chamber 5. Instead, they are guided to a specific depth inside the grinding chamber 5 before being released. This allows the material to come into contact with the rotating area of ​​the fixed cylinder 8 driven by the first servo motor 6 the moment it enters the grinding chamber 501, thus avoiding the accumulation or splashing of material at the inlet.

[0029] In some embodiments, the coal grinding system 100 for coal slurry preparation of the present invention further includes a first electric telescopic rod 13 and a second pressure block 14, wherein the telescopic end of the first electric telescopic rod 13 extends into the grinding chamber 501 and is connected to the second pressure block 14.

[0030] The briquette can move up and down axially along the grinding chamber 501 under the drive of the first electric telescopic rod 13. After the material enters the grinding chamber 501 through the feed valve 4, the first electric telescopic rod 13 can control the second briquette 14 to descend above the fixed cylinder 8 or the grinding disc 10, applying axial compressive force to the material being stirred or ground, forcing the coal particles to generate stronger friction and crushing action with the fixed cylinder 8, the grinding disc 10, and the wall of the grinding chamber 501. In the pre-stirring stage, the briquette can press the accumulated material into the rotation range of the fixed cylinder 8, enhancing the collision and shearing between particles. In the fine grinding stage, the briquette can further compact the material onto the surface of the grinding disc 10, improving grinding efficiency.

[0031] In some embodiments, the coal pulverizing system 100 for coal slurry preparation of the present invention further includes two first fixed boxes 15, a weighing sensor 16, a first pressure block 17, a weighing device 18, and a first discharge valve 19. The two first fixed boxes 15 are disposed on the top of the mixing box 2. The first fixed box 15 has an inner cavity. The weighing sensor 16 is disposed in the inner cavity of the first fixed box 15. The first pressure block 17 is disposed inside the first fixed box 15 and above the weighing sensor 16. The top end of the first pressure block 17 extends to the outside of the first fixed box 15. The weighing device 18 is fixedly connected between the two first pressure blocks 17. The first discharge valve 19 is disposed at the bottom of the weighing device 18. The bottom end of the first discharge valve 19 extends into the interior of the mixing box 2.

[0032] Two first fixed boxes 15 are symmetrically arranged on the top of the mixing box 2. Each box has an internal cavity containing a weighing sensor 16. Above the weighing sensor 16 is a first pressure block 17, the top of which extends to the outside of the first fixed box 15. A weighing device 18 is fixedly connected between the two first pressure blocks 17. The bottom of the weighing device 18 has a first discharge valve 19, the bottom of which extends into the mixing box 2. Raw materials such as coal, water, or additives first enter the weighing device 18. The weight of the weighing device 18 itself and the weight of the materials inside are transmitted to the corresponding weighing sensors 16 through the two first pressure blocks 17. The weighing sensors 16 detect the pressure signal in real time and convert it into weight data, thereby accurately controlling the amount of raw materials input for each batch. When the weight reaches the set value, the system controls the first discharge valve 19 to open, releasing a fixed amount of material through its bottom into the mixing box 2. Subsequently, the material enters the grinding box 5 through the hopper 3 and the feed valve 4 for further pre-mixing and fine grinding.

[0033] By cooperating with the weighing sensor 16 and the first pressure block 17, the mass of material inside the weighing device 18 can be measured directly and stably. This avoids the proportioning errors caused by density changes and humidity fluctuations in traditional volumetric feeding, ensuring the precise ratio of coal, water, and additives, thereby guaranteeing the concentration and viscosity stability of the coal-water slurry from the source. The symmetrical layout of the two first fixed boxes 15 ensures balanced force on the weighing device 18, avoiding the impact of eccentric loading on weighing accuracy. Furthermore, the structure of the first pressure block 17 extending to the outside of the fixed box facilitates a secure connection with the weighing device 18, improving mechanical reliability.

[0034] In some embodiments, the coal grinding system 100 for coal slurry preparation of the present invention further includes a fourth electric telescopic rod 20, a second fixed box 21, a third servo motor 22, a connecting ring 52, a fixed ring 23, a rotating shaft 24, a first worm gear 25, and a first worm wheel 26. The fourth electric telescopic rod 20 is disposed on the top of the base plate 1, and the second fixed box 21 is disposed at the telescopic end of the fourth electric telescopic rod 20. A connecting ring 52 is fixedly connected to one side of the second fixed box 21, and one end of the connecting ring 52 extends into the mixing box 2 and is fixedly connected to a fixed ring. 23. A rotating shaft 24 is rotatably connected to one side of the second fixed box 21. One end of the rotating shaft 24 extends to the outside of the second fixed box 21 and is fixedly connected to a rotating column 37. One end of the rotating column 37 extends into the inside of the mixing box 2. The first worm gear 25 is rotatably disposed inside the second fixed box 21. The output end of the third servo motor 22 is fixedly connected to the top of the first worm gear 25. The first worm wheel 26 is fixedly sleeved on the outside of the rotating shaft 24 and is connected to the first worm gear 25 for transmission. A fourth servo motor 27 is fixedly connected to one side of the rotating column 37.

[0035] A fourth electric telescopic rod 20 is installed on the top of the base plate 1, and the telescopic end of the fourth electric telescopic rod 20 is fixedly connected to the second fixed box 21. One side of the second fixed box 21 extends into the mixing box 2 through a connecting ring 52 and connects to a fixing ring 23, thereby forming a stable connection between the second fixed box 21 and the side wall or internal structure of the mixing box 2. A first worm gear 25 is rotatably provided inside the second fixed box 21, and the output end of the third servo motor 22 is fixedly connected to the top of the first worm gear 25. A first worm wheel 26 is fixedly fitted on the outside of the rotating shaft 24 and meshes with the first worm gear 25 for transmission. The fourth electric telescopic rod 20 can drive the second fixed box 21 to move vertically as needed, thereby driving the connecting ring 52, the fixing ring 23, and the rotating column 37 to adjust their positions up and down inside the mixing box 2. The third servo motor 22 drives the rotating shaft 24 to rotate through the worm gear pair, thereby enabling the rotating column 37 to rotate horizontally inside the mixing box 2. The fourth servo motor 27 can independently drive the rotating column 37 to rotate, so that the material in the mixing box 2 can be fully stirred, homogenized and pre-dispersed before entering the hopper 3. Especially for the mixing process of water, coal powder and additives, it can achieve strong shearing and convection in different directions.

[0036] In some embodiments, the coal grinding system 100 for coal slurry preparation of the present invention further includes a drive plate 28, a plurality of rotating rods 31, a plurality of insert blocks 32, a stirring blade 33, a second worm gear 34, a fourth worm wheel 35, a guide rod 36, a second bevel gear 42 and a first bevel gear 45. The rotating column 37 has a receiving cavity 30 inside, and the drive plate 28 is slidably connected to the receiving cavity 30. The drive plate 28 has an inner cavity, and the plurality of rotating rods 31 are rotatably disposed at the bottom of the inner cavity of the drive plate 28. The plurality of insert blocks 32 are disposed at the top of the drive plate 28, and the top of the rotating rods 31 passes through the insert blocks 32 and extends to the upper side of the rotating column 37. The stirring blade 33 is disposed on the rotating rod 31, the second worm gear 34 is rotatably disposed inside the drive plate 28, and the fourth worm wheel 35 is sleeved on the rotating rod 31. The fourth worm wheel 35 and the second worm gear 34 are connected in a transmission manner. The rotating column 37 has an inner cavity and... A drive groove 38 is located on one side of the storage cavity 30. A guide rod 36 is rotatably disposed in the drive groove 38. A guide block 39 is slidably connected to the outside of the guide rod 36. A slider 40 is provided inside the guide block 39 and outside the guide rod 36. Two annular cavities 41 are slidably connected inside the slider 40. A second bevel gear 42 is fixedly sleeved on the outside of the guide rod 36. The top of the annular cavity 41 extends to the top of the guide block 39 and is fixedly connected to the bottom of the second bevel gear 42. Spline grooves 43 are provided on both sides of the guide rod 36. A spline member 44 is slidably connected inside the spline groove 43. One end of the spline member 44 extends to the outside of the guide rod 36 and is fixedly connected to the inside of the annular cavity 41. A first bevel gear 45 is sleeved on one end of the second worm gear 34. One end of the second worm gear 34 extends into the drive groove 38. The first bevel gear 45 and the second bevel gear 42 mesh.

[0037] The fourth servo motor 27 drives the guide rod 36 to rotate. The guide rod 36 drives the annular cavity 41 to rotate through the spline groove 43 and spline component 44. The annular cavity 41 drives the second bevel gear 42 to rotate. The second bevel gear 42 meshes with the first bevel gear 45, thereby driving the second worm gear 34 to rotate. The second worm gear 34 drives multiple rotating rods 31 to rotate through the fourth worm wheel 35, causing the stirring blades 33 to rotate above the rotating column 37. At the same time, the drive plate 28 can slide up and down in the receiving cavity 30, thereby driving the rotating rods 31 and the stirring blades 33 to rise and fall as a whole, realizing the extension and retraction of the stirring blades 33 at different depths in the mixing box 2. Combining the fourth electric telescopic rod 20 driving the second fixed box 21, the third servo motor 22 driving the rotating column 37 to rotate horizontally, and the fourth servo motor 27 driving the guide rod 36 to rotate, a three-dimensional stirring motion can be formed in the mixing box 2. The rotating column 37 can move up and down and rotate horizontally as a whole, and the multiple stirring blades 33 can rotate independently and extend and retract up and down, thereby performing all-round shearing, convection and mixing of materials.

[0038] In some embodiments of the present invention, the coal grinding system 100 for coal slurry preparation further includes an induction plate 46 and a sensor 47. The induction plate 46 is disposed on the outside of the rotating rod 31, and the sensor 47 is fixedly connected to the bottom of the inner cavity of the drive rod and below the induction plate 46.

[0039] Sensor 47 can be a non-contact detection element such as a Hall sensor, photoelectric sensor, or proximity switch. When the fourth servo motor 27 drives the rotating rod 31 to rotate via the guide rod 36, the second bevel gear 42, the first bevel gear 45, the second worm gear 34, and the fourth worm wheel 35, the sensing plate 46 rotates synchronously with the rotating rod 31. Each time it passes the sensor 47, the sensor 47 generates a pulse signal or a switching signal, thereby monitoring the rotational state of the rotating rod 31 in real time. This signal can be fed back to the system controller (such as a PLC or microcontroller) to determine whether the stirring blade 33 is working properly, or to automatically adjust the output frequency of the fourth servo motor 27 according to the speed deviation, ensuring the synchronization of multiple rotating rods 31. Combined with the lifting and lowering movement of the drive plate 28 within the receiving cavity 30, the sensor 47 can also assist in determining the position of the drive plate 28, providing feedback for the extension and retraction control of the stirring blade 33.

[0040] In some embodiments, the coal pulverizing system 100 for coal slurry preparation of the present invention further includes a third worm, a second worm wheel 48, a fixed block 49, a connecting rod 50, a drive gear 51, a fourth worm wheel 35, and a pulley 53. The third worm is rotatably disposed in the drive groove 38, the second worm wheel 48 is sleeved on the outside of the guide rod 36, and the second worm wheel 48 and the third worm are connected by transmission. The fixed block 49 is located inside the fixed ring 23, and the fixed block 49 is fixedly connected to the outside of the rotating column 37. The connecting cover plate is rotatably disposed on one side of the fixed block 49. The drive gear 51 is fixedly disposed on the outside of the connecting rod 50, the fourth worm wheel 35 is fixedly disposed inside the fixed ring 23, and the fourth worm wheel 35 and the drive gear 51 cooperate with each other. The connecting rod 50 and the third worm are connected by transmission through the pulley 53.

[0041] The fourth servo motor 27 or other power source drives the guide rod 36 to rotate, and the guide rod 36 drives the third worm to rotate through the second worm wheel 48. The third worm transmits power to the connecting rod 50 through the pulley 53, causing the connecting rod 50 to rotate. During the engagement of the drive gear 51 on the connecting rod 50 with the fourth worm wheel 35 inside the fixed ring 23, since the fourth worm wheel 35 is fixed, the drive gear 51 will revolve around the fourth worm wheel 35 while rotating on its own axis, thereby driving the fixed block 49 and the rotating column 37 fixed thereto to rotate as a whole around the central axis of the fixed ring 23. This rotational motion is superimposed with the vertical movement driven by the fourth electric telescopic rod 20 and the horizontal rotation driven by the third servo motor 22, forming a compound motion.

[0042] In some embodiments, the coal pulverizing system 100 for coal slurry preparation of the present invention further includes a sliding screw 54, a drive block 55, a fourth worm 56, and a third worm wheel 57. The sliding screw 54 is rotatably disposed in the drive groove 38. The drive block 55 is threadedly connected to the sliding screw 54. One end of the drive block 55 is fixedly connected to one side of the guide block 39. One side of the guide block 39 is fixedly connected to one side of the drive plate 28. The fourth worm 56 is rotatably connected in the drive groove 38. The third worm wheel 57 is fixedly sleeved on the outside of the sliding screw 54. The third worm wheel 57 and the fourth worm 56 are connected in a transmission manner. One end of the fourth worm 56 extends to the outside of the rotating column 37 and is fixedly connected to the output end of the fourth servo motor 27.

[0043] During operation, the fourth servo motor 27 rotates, driving the sliding screw 54 to rotate through the meshing of the fourth worm 56 and the third worm wheel 57. The rotational motion of the sliding screw 54 is converted into the linear movement of the drive block 55 through the threaded pair, thereby driving the guide block 39 and the drive plate 28 fixed thereto to slide up and down along the drive groove 38. Since multiple rotating rods 31 and stirring blades 33 are installed on the drive plate 28, the stirring blades 33 can move up and down and extend and retract within the receiving cavity 30 inside the rotating column 37 along with the drive plate 28. At the same time, the fourth servo motor 27 also drives the guide rod 36 to rotate through the guide rod 36-spline mechanism. The rotation of the guide rod 36 drives the second worm 34 and the fourth worm wheel 35 to make the stirring blades 33 rotate, and drives the rotating column 37 to revolve through the second worm wheel 48, the third worm, the pulley 53, etc. Therefore, the fourth servo motor 27 can simultaneously realize the lifting and rotation of the stirring blade 33 and the revolution of the rotating column 37, achieving a high degree of integration of the lifting and rotational motion of the stirring blade 33, simplifying the transmission chain and reducing manufacturing costs.

[0044] In some embodiments, the coal pulverizing system 100 for coal slurry preparation of the present invention further includes a second discharge valve 58, which is disposed at the bottom of the mixing tank 2.

[0045] The second discharge valve 58 is directly installed at the bottom of the mixing tank 2. Its upstream side receives the premixed slurry that has been weighed, fed, and stirred in the mixing tank 2, and its downstream side is connected to the silo 3. During operation, after the coal, water, and additives in the mixing tank 2 have been fully homogenized, the control system opens the second discharge valve 58 according to a preset sequence. The premixed slurry flows to the silo 3 under gravity, and then enters the grinding tank 5 through the feed valve 4 at the bottom of the silo 3 for subsequent pre-crushing driven by the first servo motor 6 and fine grinding driven by the second servo motor 11.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coal grinding system for coal slurry preparation, characterized in that, include: Base plate (1); A mixing box (2) is located on top of the base plate (1); The hopper (3) and the feed valve (4) are located at the top of the mixing tank (2) and at the bottom of the hopper (3). Grinding box (5), the grinding box (5) is located at the bottom of the feed valve (4), the grinding box (5) has a grinding chamber (501); The first servo motor (6) is located at the top of the grinding chamber (501); Connecting block (7), the connecting block (7) is located at the output end of the first servo motor (6), and fixing cylinders (8) are provided on both sides of the connecting block (7). The first transmission gear (9) is rotatably disposed in the groove (502) at the bottom of the grinding box (5). Grinding disc (10), the grinding disc (10) is disposed inside the first transmission gear (9); The second servo motor (11) is located at the bottom of the grinding box (5). The grinding box (5) has a drive cavity (503). The drive cavity (503) is located on one side of the slot (502) and the slot (502) is connected. The output end of the second servo motor (11) extends into the drive cavity (503). The second transmission gear (12) is located in the drive cavity (503) and connected to the output end of the second servo motor (11). The second transmission gear (12) and the first transmission gear (9) are connected in a transmission manner.

2. The coal grinding system for coal slurry preparation according to claim 1, characterized in that, The bottom end of the feed valve (4) extends into the interior of the grinding box (5).

3. The coal grinding system for coal slurry preparation according to claim 1, characterized in that, It also includes a first electric telescopic rod (13) and a second pressure block (14), wherein the telescopic end of the first electric telescopic rod (13) extends into the grinding chamber (501) and is connected to the second pressure block (14).

4. The coal grinding system for coal slurry preparation according to claim 3, characterized in that, Also includes: Two first fixing boxes (15) are disposed on the top of the mixing box (2), and the first fixing boxes (15) have an inner cavity; Weighing sensor (16), the weighing sensor (16) is disposed in the inner cavity of the first fixed box (15); The first pressure block (17) and the weighing device (18) are provided inside the first fixed box (15) and above the weighing sensor (16). The top of the first pressure block (17) extends to the outside of the first fixed box (15). The weighing device (18) is fixedly connected between the two first pressure blocks (17). The first discharge valve (19) is located at the bottom of the weighing device (18), and the bottom end of the first discharge valve (19) extends into the mixing tank (2).

5. The coal grinding system for coal slurry preparation according to claim 4, characterized in that, Also includes: The fourth electric telescopic rod (20) is located on the top of the base plate (1); The second fixing box (21) is located at the telescopic end of the fourth electric telescopic rod (20); The third servo motor (22), connecting ring (52), fixing ring (23) and rotating shaft (24) are connected to one side of the second fixed box (21). One end of the connecting ring (52) extends into the mixing box (2) and is fixedly connected to the fixing ring (23). The rotating shaft (24) is rotatably connected to one side of the second fixed box (21). One end of the rotating shaft (24) extends into the outside of the second fixed box (21) and is fixedly connected to the rotating column (37). One end of the rotating column (37) extends into the mixing box (2). The first worm gear (25) is rotatably disposed in the second fixed box (21), and the output end of the third servo motor (22) is fixedly connected to the top of the first worm gear (25). The first worm gear (26) is fixedly sleeved on the outside of the rotating shaft (24) and is connected to the first worm (25) for transmission. A fourth servo motor (27) is fixedly connected to one side of the rotating column (37).

6. The coal grinding system for coal slurry preparation according to claim 5, characterized in that, Also includes: The drive plate (28) has a storage cavity (30) inside the rotating column (37), and the drive plate (28) is slidably connected to the inside of the storage cavity (30); Multiple rotating rods (31), the drive plate (28) has an inner cavity, and the multiple rotating rods (31) are rotatably disposed at the bottom of the inner cavity of the drive plate (28); Multiple inserts (32) are provided on the top of the drive plate (28), and the top of the rotating rod (31) passes through the inserts (32) and extends to the upper side of the rotating column (37); Stirring blade (33), the stirring blade (33) is disposed on the rotating rod (31); The second worm (34) and the fourth worm wheel (35) are rotatably disposed inside the drive plate (28), and the fourth worm wheel (35) is sleeved on the rotating rod (31). The fourth worm wheel (35) and the second worm (34) are connected in a transmission manner. The guide rod (36) has a drive groove (38) inside the rotating column (37) and located on one side of the receiving cavity (30). The guide rod (36) is rotatably disposed in the drive groove (38). A guide block (39) is slidably connected to the outside of the guide rod (36). A slider (40) is provided inside the guide block (39) and located on the outside of the guide rod (36). Two annular cavities (41) are slidably connected inside the slider (40). The second bevel gear (42) is fixedly sleeved on the outside of the guide rod (36). The top of the annular cavity (41) extends to the top of the guide block (39) and is fixedly connected to the bottom of the second bevel gear (42). Spline grooves (43) are provided on both sides of the guide rod (36). A spline component (44) is slidably connected inside the spline groove (43). One end of the spline component (44) extends to the outside of the guide rod (36) and is fixedly connected to the inside of the annular cavity (41). The first bevel gear (45) is sleeved on one end of the second worm (34), and one end of the second worm (34) extends into the drive groove (38). The first bevel gear (45) and the second bevel gear (42) mesh.

7. The coal grinding system for coal slurry preparation according to claim 6, characterized in that, It also includes a sensing plate (46) and a sensor (47). The sensing plate (46) is located on the outside of the rotating rod (31), and the sensor (47) is fixedly connected to the bottom of the inner cavity of the driving rod and below the sensing plate (46).

8. The coal grinding system for coal slurry preparation according to claim 7, characterized in that, Also includes: The third worm gear is rotatably disposed in the drive groove (38); The second worm gear (48) is sleeved on the outside of the guide rod (36), and the second worm gear (48) is connected to the third worm gear in a transmission connection. A fixing block (49) is located inside the fixing ring (23), and the fixing block (49) is fixedly connected to the outside of the rotating column (37); The connecting rod (50) and the connecting cover plate are rotatably disposed on one side of the fixing block (49); A drive gear (51) is fixedly disposed on the outside of the connecting rod (50); The fourth worm gear (35) and the pulley (53) are fixed inside the fixed ring (23). The fourth worm gear (35) and the drive gear (51) are engaged. The connecting rod (50) and the third worm are connected by the pulley (53).

9. The coal grinding system for coal slurry preparation according to claim 8, characterized in that, Also includes: A sliding lead screw (54) is rotatably disposed within the drive groove (38); Drive block (55), which is threaded to the sliding screw (54), one end of the drive block (55) is fixedly connected to one side of the guide block (39), and one side of the guide block (39) is fixedly connected to one side of the drive plate (28); A fourth worm (56) is rotatably connected to the drive slot (38); The third worm gear (57) is fixedly sleeved on the outside of the sliding screw (54). The third worm gear (57) and the fourth worm (56) are connected in a transmission. One end of the fourth worm (56) extends to the outside of the rotating column (37) and is fixedly connected to the output end of the fourth servo motor (27).

10. The coal grinding system for coal slurry preparation according to claim 9, characterized in that, It also includes a second discharge valve (58), which is located at the bottom of the mixing tank (2).

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