Powder impurity removal equipment for graphite production

Abstract

The invention discloses powder impurity removal equipment for graphite production, relates to the technical field of screening devices, and provides the following scheme that the powder impurity removal equipment comprises a shell, a fixed frame is connected to the shell, a screen is connected to the fixed frame, a plurality of pairs of abutting rods are slidably connected to the fixed frame, and a pair of rotating rods is rotatably connected between each pair of abutting rods; a pair of two-way screw rods are rotationally connected to the fixing frame, air holes are formed in the rotating rods, a discharging hopper is installed on the shell, and a partition plate is connected to the discharging hopper; the bidirectional screw rod rotates to drive the screen to do sinusoidal waveform track motion, powder moves from the middle of the screen to the two ends of the screen, so that the powder is screened, compressed air is sprayed out through the air holes, impacts meshes of the screen and cleans blockages, the abutting rod continuously moves up and down, the material powder is continuously discharged, and when screening is stopped, materials are blocked, and the screening efficiency is improved. And discharging can be conveniently controlled, and operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of screening devices, and particularly to a powder impurity removal device for graphite production. Background Art

[0002] Graphite is a black material and an allotrope of carbon. It is a grayish-black, opaque solid with stable chemical properties, corrosion resistance, and is not prone to reaction with solvents such as acids and alkalis. Natural graphite comes from graphite deposits, or can also be made from petroleum coke, pitch coke, etc. as raw materials through a series of process treatments. Graphite powder, as the name implies, is the powder generated by graphite processing. In order to remove impurities from graphite powder, a graphite powder impurity removal device is required.

[0003] Referring to the Chinese invention patent with the publication number: CN 115090522 B and the name: Graphite powder screening equipment for diamond production, this invention can automatically assist in screening graphite powder, has a simple structure and low cost; it can automatically screen out large-particle graphite powder and discharge it from the inside of the device. The screening process is inside the device, which can effectively prevent the problem of flying dust; it does not require manual laborious graphite powder transportation, saving time and effort; it solves the problems of complex structure, high cost, a large amount of dust generated during the screening process, and time-consuming and laborious manual feeding of graphite powder screening equipment.

[0004] However, in the actual use process, the above and similar technical solutions still have some problems: 1. In the operation of screening impurities from graphite materials, a vibrating screen is usually used as the main screening equipment. However, when the vibrating screen operates, although a larger amplitude promotes the screening efficiency, it also causes the generation of a large amount of powder dust. These tiny particles suspended in the air pose a potential threat to the respiratory health of on-site workers if effective dust control measures are lacking, increasing the occupational health risk; 2. During the screening process, graphite powder is usually directly poured onto the surface of the vibrating screen, resulting in an excessive accumulation of powder on the screen surface. Due to the existence of intermolecular forces such as van der Waals force, electrostatic force, and liquid bridge force between powder particles, these forces will promote particle agglomeration, reduce the fluidity of the powder, and thus affect its dispersibility, making it difficult to evenly disperse the powder on the surface of the vibrating screen and affecting the screening efficiency; 3. During the long-term and continuous use of the vibrating screen, the mesh holes on the screen are easily blocked by graphite powder particles. This phenomenon not only hinders the effective passage of the powder, reducing the screening efficiency, but also requires regular manual cleaning to restore the permeability of the screen. The manual cleaning process is time-consuming and laborious, and if the cleaning is not timely, it will further exacerbate the blockage of the screen, seriously affecting the overall efficiency and continuity of the screening operation. Summary of the Invention

[0005] The object of the present invention is to solve the deficiencies existing in the prior art, and to propose a powder impurity removal device for graphite production, which is convenient for dredging the screen mesh, effectively reduces the vibration frequency, can reduce dust generation, and is convenient for controlling materials.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A powder impurity removal device for graphite production, including a housing, a screening mechanism is connected to the housing, the screening mechanism includes a fixed frame, the fixed frame is connected to the housing, a screen mesh is connected to the fixed frame, an adjusting mechanism is connected to the fixed frame, the adjusting mechanism includes a resisting rod, a plurality of pairs of resisting rods are slidably connected to the fixed frame, a third spring is connected between the resisting rod and the fixed frame, a pair of rotating rods are rotatably connected between each pair of resisting rods, the screen mesh passes through between each pair of rotating rods, a pair of bidirectional screw rods are rotatably connected to the fixed frame, a pair of bidirectional screw rods respectively correspond to the resisting rods at both ends, the axis of the resisting rod is perpendicular to the axis of the bidirectional screw rod, and the resisting rod abuts against the bidirectional screw rod; A cleaning mechanism is connected to the rotating rod, the cleaning mechanism includes an air hole, the rotating rod is provided with an air hole, a gas injection assembly is connected to the fixed frame, and the air hole is connected to the gas injection assembly; A feeding mechanism is connected to the housing, the feeding mechanism includes a feeding hopper, the housing is provided with a feeding hopper above the middle position of the screen mesh, a partition plate is slidably connected to the feeding hopper, a top rod is slidably connected to the feeding hopper, the top end of the top rod is connected to the partition plate, and the bottom end of the top rod abuts against the rotating rod.

[0007] Preferably, the resisting rod is arranged above the bidirectional screw rod, and a plurality of pairs of resisting rods respectively abut against the peak, axis and valley positions of a pair of bidirectional screw rods.

[0008] Preferably, a fixing plate is installed at the outlet end of the feeding hopper, the partition plate is slidably connected to the fixing plate, the partition plate slides with the feeding hopper through the fixing plate, a first spring is installed between the partition plate and the fixing plate, the partition plate abuts against the inner wall of the feeding hopper through the first spring, a connecting rod is rotatably connected to the bottom side of the partition plate, and the connecting rod is rotatably connected to the top end of the top rod.

[0009] Preferably, the air pumping assembly includes an air compression cylinder. The fixed frame is provided with an air compression cylinder at each contact rod. A piston is slidably connected in the air compression cylinder. A second one-way valve is installed on the piston and penetrates through it. A first one-way valve is installed at the bottom side of the air compression cylinder and penetrates through it. An air pipe is installed between the piston and the contact rod. External gas is unidirectionally communicated with the inside of the air compression cylinder through the first one-way valve. The inside of the air compression cylinder is unidirectionally communicated with the air pipe through the second one-way valve. The contact rod and the rotating rod are hollow. The air pipe is communicated with the air hole through the contact rod and the rotating rod.

[0010] Preferably, a pair of the bidirectional screw rods are parallel to each other and rotate synchronously. The fixed frame is provided with a first motor at one end of each bidirectional screw rod. The output shaft of the first motor is fixedly connected to the same-side shaft end of the bidirectional screw rod. The lengths of the reverse portions at both ends of the bidirectional screw rod are equal. The intersection part of the bidirectional screw rods is located in the middle of the screen.

[0011] Preferably, a second spring is installed between the fixed frame and the housing. Vibration motors are installed on both sides of the fixed frame.

[0012] Preferably, a sliding plate is installed on the contact rod. The sliding plate is slidably connected to the fixed frame. Both ends of the third spring are fixedly connected to the sliding plate and the fixed frame respectively.

[0013] Preferably, a replacement mechanism is connected to the fixed frame. The replacement mechanism includes a storage box. The fixed frame is slidably connected with a storage box at both ends of the screen. A fourth spring is installed between the storage box and the fixed frame. Both ends of the screen are respectively connected to a pair of storage boxes.

[0014] Preferably, a rotating winding shaft is inserted into the storage box. Both ends of the screen are respectively wound on a pair of winding shafts. A closing plate is rotatably connected to the storage box. One end of the closing plate is buckled with the storage box. A second gear is installed on one side of the winding shaft. A second motor is installed on one side of the storage box. A first gear is installed on the output shaft of the second motor. The first gear meshes with the second gear.

[0015] Preferably, a plurality of collecting hoppers are installed below the screen of the fixed frame. The plurality of collecting hoppers are arranged linearly. The linear direction of the collecting hoppers is perpendicular to the linear direction of the rotating rod.

[0016] Compared with the prior art, the present invention provides a powder impurity removal device for graphite production, which has the following beneficial effects: 1. The powder impurity removal equipment for graphite production pours the powder into the lower hopper, starts a pair of first motors, drives a pair of bidirectional screw rods to rotate, and the two ends of the bidirectional screw rods respectively drive multiple pairs of resistance rods to move up and down in a sinusoidal waveform trajectory, thereby driving the screen to move in a sinusoidal waveform trajectory. The movement directions of the two ends of the screen are also opposite, so that the powder moves from the middle of the screen to the two ends. When the powder moves on the screen, the screen screens the powder to remove larger impurities. There is no need for the vibration motor to vibrate greatly, the material fluctuation is small, and the generation of dust is effectively reduced. By designing mesh holes of different sizes at different positions of the screen, particles of different sizes can be screened out without multi-layer screening, which is more practical.

[0017] 2. The powder impurity removal equipment for graphite production has a resistance rod that continuously moves up and down, pushing the piston to move up and down, compressing the gas inside the air cylinder and ejecting it through the air holes. The compressed gas impacts the mesh of the screen to clear the blockage. With the movement of the rotating rod, the screen continuously changes its angle and moves on both sides of the rotating rod. The bending of the screen can squeeze out the particles in the mesh to ensure the screening efficiency. When the screen needs to be replaced, a pair of second motors are started to drive a pair of winding shafts to respectively wind up and release the two ends of the screen, so that the new screen is released for easy replacement.

[0018] 3. The powder impurity removal equipment for graphite production, when the resistance rod under the lower hopper moves upward, the top rod is pushed upward by the rotating rod, and the partition plate is pushed into the fixed plate by the connecting rod. The first spring is compressed, the lower hopper is opened, and the material powder falls onto the screen to complete the unloading. When the resistance rod moves downward, it drives the rotating rod to separate from the top rod, and the first spring resets and extends, pushing the partition plate to extend and reset, isolating the lower hopper to prevent the material powder from falling. The resistance rod continuously moves up and down to continuously release the material powder. When the screening stops, the material is blocked, which is convenient for controlling the unloading and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional view of a powder impurity removal device for graphite production proposed by the present invention; Figure 2 A view of a fixed frame connection structure of the present invention; Figure 3 A view of a screen connection structure of the present invention; Figure 4 A view of a collecting bucket connection structure of the present invention; Figure 5 A view of a connection structure of a gas cylinder according to the present invention; Figure 6 A view of a sliding plate connection structure of the present invention; Figure 7 A view of a bidirectional spiral rod connection structure of the present invention; Figure 8View of the rotating rod connection structure of the present invention; Figure 9 View of the piston connection structure of the present invention; Figure 10 View of the first motor connection structure of the present invention; Figure 11 View of the storage box connection structure of the present invention; Figure 12 View of the second motor connection structure of the present invention; Figure 13 View of the closing plate connection structure of the present invention; Figure 14 View of the connecting rod connection structure of the present invention; Figure 15 View of the partition plate connection structure of the present invention.

[0020] In the figure: 1. Housing; 2. Feeding mechanism; 21. Feeding hopper; 22. Fixed plate; 23. Partition plate; 24. Top rod; 25. Connecting rod; 26. First spring; 3. Screening mechanism; 31. Second spring; 32. Fixed frame; 33. Sieve mesh; 34. Vibration motor; 35. Collection hopper; 4. Adjusting mechanism; 41. Rotating rod; 42. First motor; 43. Bi-directional screw rod; 44. Contact rod; 45. Sliding plate; 46. Third spring; 5. Cleaning mechanism; 51. Air compression cylinder; 52. Air pipe; 53. First one-way valve; 54. Air hole; 55. Piston; 56. Second one-way valve; 6. Replacement mechanism; 61. Storage box; 62. First gear; 63. Second gear; 64. Fourth spring; 65. Second motor; 66. Closing plate; 67. Reel shaft. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] Embodiment 1: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 ,Figure 6 , Figure 7 , Figure 8 and Figure 10 , a powder impurity removal device for graphite production, comprising a housing 1, a screening mechanism 3 is connected to the housing 1. The screening mechanism 3 includes a fixed frame 32, the fixed frame 32 is connected to the housing 1, a screen 33 is connected to the fixed frame 32, and an adjusting mechanism 4 is connected to the fixed frame 32. The adjusting mechanism 4 includes a resisting rod 44. A plurality of pairs of resisting rods 44 are slidably connected to the fixed frame 32. A third spring 46 is connected between the resisting rod 44 and the fixed frame 32. A pair of rotating rods 41 are rotatably connected between each pair of resisting rods 44. The screen 33 passes through between each pair of rotating rods 41. A pair of bidirectional screw rods 43 are rotatably connected to the fixed frame 32. A pair of bidirectional screw rods 43 respectively correspond to the resisting rods 44 at both ends. The axis of the resisting rod 44 is perpendicular to the axis of the bidirectional screw rod 43. The resisting rod 44 abuts against the bidirectional screw rod 43 to make a pair of bidirectional screw rods 43 rotate. Under the action of the third spring 46, the resisting rod 44 is in close contact with the surface of the bidirectional screw rod 43. The two ends of the bidirectional screw rod 43 respectively drive a plurality of pairs of resisting rods 44 to move up and down in a sine wave trajectory, thereby driving the screen 33 to move in a sine wave trajectory.

[0024] In the present invention, the resisting rod 44 is arranged above the bidirectional screw rod 43. A plurality of pairs of resisting rods 44 respectively abut against the crest, axis and trough positions of a pair of bidirectional screw rods 43, thereby facilitating the screen 33 to move in a sine wave trajectory.

[0025] In the present invention, a pair of bidirectional screw rods 43 are parallel to each other and rotate synchronously. A first motor 42 is installed at one end of each bidirectional screw rod 43 on the fixed frame 32. The output shaft of the first motor 42 is fixedly connected to the same-side shaft end of the bidirectional screw rod 43. The lengths of the reverse portions at both ends of the bidirectional screw rod 43 are equal. The junction part of the bidirectional screw rod 43 is located in the middle of the screen 33, thereby facilitating driving the bidirectional screw rod 43 to rotate, facilitating driving the material powder on the screen 33 to move towards both ends, and thus facilitating screening.

[0026] In the present invention, a second spring 31 is installed between the fixed frame 32 and the housing 1, and vibration motors 34 are installed on both sides of the fixed frame 32, thereby enabling the screen 33 to vibrate and improving the screening effect.

[0027] In the present invention, a sliding plate 45 is installed on the resisting rod 44. The sliding plate 45 is slidably connected to the fixed frame 32. Both ends of the third spring 46 are fixedly connected to the sliding plate 45 and the fixed frame 32 respectively.

[0028] In the present invention, a plurality of collecting hoppers 35 are installed below the screen 33 on the fixed frame 32. The plurality of collecting hoppers 35 are arranged linearly, and the linear direction of the collecting hoppers 35 is perpendicular to the linear direction of the rotating rod 41, thereby facilitating the collection of the sieved material powder.

[0029] Embodiment 2: On the basis of Embodiment 1, referring to Figure 9 , Figure 11 , Figure 12 and Figure 13 , a powder impurity removal device for graphite production, a cleaning mechanism 5 is connected to the rotating rod 41. The cleaning mechanism 5 includes air holes 54. The rotating rod 41 is provided with air holes 54. A gas injection assembly is connected to the fixed frame 32, and the air holes 54 are connected to the gas injection assembly, thereby facilitating the injection of gas through the air holes 54 to dredge the mesh holes.

[0030] In the present invention, the gas injection assembly includes a gas compression cylinder 51. A gas compression cylinder 51 is installed on the fixed frame 32 at each position of the abutting rod 44. A piston 55 is slidably connected in the gas compression cylinder 51. A through second one-way valve 56 is installed on the piston 55. A through first one-way valve 53 is installed on the bottom side of the gas compression cylinder 51. An air pipe 52 is installed between the piston 55 and the abutting rod 44. External gas is unidirectionally communicated with the inside of the gas compression cylinder 51 through the first one-way valve 53. The inside of the gas compression cylinder 51 is unidirectionally communicated with the air pipe 52 through the second one-way valve 56. The abutting rod 44 and the rotating rod 41 are hollow. The air pipe 52 is communicated with the air holes 54 through the abutting rod 44 and the rotating rod 41. The abutting rod 44 continuously moves up and down, driving the piston 55 to continuously move up and down, thereby facilitating the continuous pressing of external gas into the gas compression cylinder 51 and then pressing it into the air pipe 52 through the gas compression cylinder 51, and facilitating the ejection from the air holes 54.

[0031] In the present invention, a replacement mechanism 6 is connected to the fixed frame 32. The replacement mechanism 6 includes a storage box 61. The fixed frame 32 is slidably connected with a storage box 61 at both ends of the screen 33. A fourth spring 64 is installed between the storage box 61 and the fixed frame 32. Both ends of the screen 33 are respectively connected to a pair of storage boxes 61. The storage box 61 can slide, so when driving the screen 33 to bend, a certain moving space is given to the screen 33, thereby effectively avoiding damage to the screen 33.

[0032] In the present invention, a rotating winding shaft 67 is inserted into the storage box 61. Both ends of the screen 33 are respectively wound on a pair of winding shafts 67. A closing plate 66 is rotatably connected to the storage box 61. One end of the closing plate 66 is buckled with the storage box 61. A second gear 63 is installed on one side of the winding shaft 67. A second motor 65 is installed on one side of the storage box 61. A first gear 62 is installed on the output shaft of the second motor 65. The first gear 62 meshes with the second gear 63. By the second motor 65, the winding shaft 67 can be driven to wind and release the screen 33, thereby facilitating the replacement of the screen 33.

[0033] Example 3: On the basis of Example 2, referring to Figure 14 and Figure 15 , a powder impurity removal device for graphite production, a feeding mechanism 2 is connected to the housing 1. The feeding mechanism 2 includes a feeding hopper 21. The housing 1 is provided with the feeding hopper 21 above the middle position of the screen 33. A partition plate 23 is slidably connected to the feeding hopper 21. A push rod 24 is slidably connected to the feeding hopper 21. The top end of the push rod 24 is connected to the partition plate 23. The bottom end of the push rod 24 abuts against the rotating rod 41, so as to facilitate controlling the continuous opening and closing of the partition plate 23 when the abutting rod 44 moves up and down, so as to facilitate continuous feeding and stop screening. The partition plate 23 extends out, thus blocking the feeding hopper 21 and facilitating controlling the falling of the material powder.

[0034] In the present invention, a fixing plate 22 is installed at the outlet end of the feeding hopper 21. The partition plate 23 is slidably connected to the fixing plate 22. The partition plate 23 slides with the feeding hopper 21 through the fixing plate 22. A first spring 26 is installed between the partition plate 23 and the fixing plate 22. The partition plate 23 abuts against the inner wall of the feeding hopper 21 through the first spring 26. A connecting rod 25 is rotatably connected to the bottom side of the partition plate 23. The connecting rod 25 is rotatably connected to the top end of the push rod 24, so as to facilitate controlling the partition plate 23 through the connecting rod 25 and increase the stability.

[0035] Working principle: When removing impurities from graphite powder, pour the powder into the interior of the feeding hopper 21, start the vibration motor 34. Under the action of the second spring 31, the fixed frame 32 vibrates, driving the screen 33 to vibrate. Start a pair of first motors 42 to drive a pair of bidirectional screw rods 43 to rotate. Under the action of the third spring 46, the abutting rod 44 is in close contact with the surface of the bidirectional screw rod 43. The two ends of the bidirectional screw rod 43 respectively drive multiple pairs of abutting rods 44 to move up and down in a sine wave trajectory, thereby driving the screen 33 to move in a sine wave trajectory. Since the two ends of the bidirectional screw rod 43 have opposite directions, the moving directions of the two ends of the screen 33 are also opposite, causing the powder to move from the middle of the screen 33 to both ends. When the powder moves on the screen 33, the screen 33 screens the powder to remove larger impurities. The two ends of the screen 33 are provided with fourth springs 64 through the storage box 61, giving a certain concession space when the screen 33 bends and transforms to avoid damage to the screen 33. At the same time, the vibration motor 34 keeps the screen 33 in a vibrating state to improve the screening effect. By designing mesh holes of different sizes at different positions on the screen 33, particles of different sizes can be screened out and collected through the collection hopper 35 for storage; During the screening process, the resistance rod 44 continuously moves up and down, pushing the air pipe 52 to move up and down, and the air pipe 52 pushes the piston 55 to move downward, compressing the gas inside the air cylinder 51. The compressed gas enters the air pipe 52 through the second one-way valve 56, and then enters the rotating rod 41 through the resistance rod 44, and is ejected through the air hole 54. The compressed gas impacts the mesh of the screen 33 to clear the blockage. When the air pipe 52 pulls the piston 55 to move upward, the external gas is sucked into the air cylinder 51 through the first one-way valve 53, so that the gas is continuously ejected from the air hole 54. At the same time, as the rotating With the movement of the rod 41, the screen 33 continuously changes its angle and moves on both sides of the rotating rod 41. The bending of the screen 33 can squeeze out the particles in the mesh to ensure the screening efficiency. When the screen 33 needs to be replaced, a pair of second motors 65 are started to drive the first gear 62 to rotate, drive the second gear 63 to rotate, thereby driving a pair of reeling shafts 67 to reel in and release the two ends of the screen 33 respectively, so that a new screen 33 is released for easy replacement. When the screen 33 needs to be removed, the buckled closing plate 66 is opened, and the screen 33 can be rolled out from one end for easy replacement of the whole. When the resistance rod 44 under the lower hopper 21 moves upward, the top rod 24 is pushed upward by the rotating rod 41, and the partition plate 23 is pushed into the fixed plate 22 by the connecting rod 25. The first spring 26 is compressed, the lower hopper 21 is opened, and the material powder falls onto the screen 33, completing the material discharge. When the resistance rod 44 moves downward, the rotating rod 41 is driven to disengage from the top rod 24, and the first spring 26 is reset and extended, pushing the partition plate 23 to extend and reset, isolating the lower hopper 21 and preventing the material powder from falling. The resistance rod 44 continuously moves up and down, so that the material powder is continuously released. When screening stops, the material is blocked, which is convenient for controlling the material discharge and easy to operate.

[0036] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An impurity removal device for graphite production powder, including a housing, a screening mechanism is connected to the housing, the screening mechanism includes a fixed frame, the fixed frame is connected to the housing, and a screen is connected to the fixed frame, characterized in that: The fixed frame is connected with an adjustment mechanism, the adjustment mechanism includes a resistance rod, a plurality of pairs of resistance rods are slidably connected to the fixed frame, a third spring is connected between the resistance rod and the fixed frame, a pair of rotating rods are rotatably connected between each pair of the resistance rods, the screen runs through each pair of rotating rods, a pair of bidirectional spiral rods are rotatably connected to the fixed frame, a pair of the bidirectional spiral rods correspond to the resistance rods at both ends respectively, the axis of the resistance rod is perpendicular to the axis of the bidirectional spiral rod, and the resistance rods are in conflict with the bidirectional spiral rod; The rotating rod is connected to a cleaning mechanism, the cleaning mechanism includes an air hole, the rotating rod is provided with an air hole, the fixed frame is connected to an air pumping assembly, and the air hole is connected to the air pumping assembly; The shell is connected with a material discharge mechanism, and the material discharge mechanism includes a material discharge hopper. The shell is provided with a material discharge hopper above the middle position of the screen. The material discharge hopper is slidably connected with a partition plate. The material discharge hopper is slidably connected with a push rod. The top end of the push rod is connected with the partition plate, and the bottom end of the push rod is in contact with the rotating rod.

2. The impurity removal device for graphite production powder according to claim 1, characterized in that, The interference rods are arranged above the bidirectional spiral rods, and the multiple pairs of the interference rods respectively interfere with the wave crests, axes and wave troughs of a pair of bidirectional spiral rods.

3. The impurity removal device for graphite production powder according to claim 1, characterized in that, A fixed plate is installed at the outlet end of the lower hopper, and the partition plate is slidably connected to the fixed plate. The partition plate slides with the lower hopper through the fixed plate. A first spring is installed between the partition plate and the fixed plate. The partition plate contacts the inner wall of the lower hopper through the first spring. A connecting rod is rotatably connected to the bottom side of the partition plate, and the connecting rod is rotatably connected to the top end of the top rod.

4. The impurity removal device for graphite production powder according to claim 1, characterized in that, The inflation assembly includes an air cylinder, and the fixed frame is equipped with an air cylinder at each resistance rod. A piston is slidably connected inside the air cylinder, a second one-way valve is installed on the piston, and a first one-way valve is installed on the bottom side of the air cylinder. An air pipe is installed between the piston and the resistance rod, and external gas is connected to the inside of the air cylinder in a one-way manner through the first one-way valve, and the inside of the air cylinder is connected to the air pipe in a one-way manner through the second one-way valve. The resistance rod and the rotating rod are hollow, and the air pipe is connected to the air hole through the resistance rod and the rotating rod.

5. The impurity removal device for graphite production powder according to claim 1, characterized in that, A pair of bidirectional screw rods are parallel to each other and rotate synchronously. The fixed frame is located at one end of each bidirectional screw rod and is equipped with a first motor. The output shaft of the first motor is fixedly connected to the same side shaft end of the bidirectional screw rod. The reverse parts at both ends of the bidirectional screw rod are equal in length, and the junction of the bidirectional screw rods is located in the middle of the screen.

6. The impurity removal device for graphite production powder according to claim 1, characterized in that, A second spring is installed between the fixing frame and the shell, and vibration motors are installed on both sides of the fixing frame.

7. The impurity removal device for graphite production powder according to claim 1, characterized in that, A sliding plate is installed on the abutment rod, and the sliding plate is slidably connected with the fixed frame. Two ends of the third spring are respectively fixedly connected with the sliding plate and the fixed frame.

8. The impurity removal device for graphite production powder according to claim 1, characterized in that, The fixed frame is connected with a replacement mechanism, which includes a storage box. The fixed frame is slidably connected with storage boxes at both ends of the screen. A fourth spring is installed between the storage box and the fixed frame. The two ends of the screen are respectively connected with a pair of storage boxes.

9. The impurity removal device for graphite production powder according to claim 8, characterized in that, A rotating take-up shaft is inserted into the storage box. Both ends of the screen are respectively wound on a pair of take-up shafts. A closing plate is rotatably connected to the storage box. One end of the closing plate is buckled with the storage box. A second gear is installed on one side of the take-up shaft. A second motor is installed on one side of the storage box. A first gear is installed on the output shaft of the second motor. The first gear meshes with the second gear.

10. The impurity removal device for graphite production powder according to claim 1, characterized in that, A plurality of collection hoppers are installed below the screen in the fixed frame. The plurality of collection hoppers are arranged linearly. The linear direction of the collection hoppers is perpendicular to the linear direction of the rotating rod.

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