Laser particle size detection device for graphite cathode powder

Abstract

The invention discloses a graphite negative electrode powder laser particle size detection device, relates to the field of particle size detection, and solves the problem that an existing particle size detection device is difficult to continuously detect multiple batches of graphite samples, the graphite negative electrode powder laser particle size detection device comprises a device shell and a control top plate arranged above the device shell, and a driving rod and a laser detection head are mounted at the bottom of the control top plate; stirring fan blades are installed at the bottom of the driving rod, a rotating disc is rotationally installed at the top of the device shell, and two symmetrically-distributed detection cylinders and two symmetrically-distributed cleaning cylinders are arranged at the top of the rotating disc; the lifting mechanism is used for lifting the driving rod upwards, and the lifting mechanism is mounted on the inner side of the device shell; through the lifting mechanism, in the rotating process of the rotating disc, the stirring fan blades and the driving rod are lifted upwards and reset downwards, so that the stirring fan blades and the driving rod enter the detection barrel and the cleaning barrel conveniently, particle size detection of a graphite sample and cleaning of the stirring fan blades are realized, and the effect of continuous detection is achieved.

Description

Technical Field

[0001] The present invention relates to the field of particle size detection, and particularly to a laser particle size detection device for graphite anode powder. Background Art

[0002] Graphite anode powder is an important component of the negative electrode material of lithium-ion batteries, mainly processed from natural graphite or artificial graphite. The original ore after blasting is crushed by a stone breaker, and then through steps such as ball mill flotation and grinding and selection, finally graphite powder is obtained. It has characteristics such as a low lithium insertion potential and a layered structure suitable for lithium ion insertion and extraction. In power lithium batteries and consumer lithium batteries, graphite negative electrode materials occupy the mainstream of the market.

[0003] Particle size detection is a key step in the production of graphite anode powder, directly affecting the compaction density, rate performance, and cycle life of the battery. Usually, laser scattering is used to measure the size and distribution of graphite anode powder. The graphite sample is evenly dispersed in a solution, and then the laser is focused on the graphite anode powder in the solution. By detecting the light scattered by the particles, the size and distribution of the particles are calculated. When detecting the graphite sample, the graphite sample needs to be poured into a detection cup filled with a solution. Through the rotation of the stirring head, the graphite sample is dispersed in the solution. By detecting the light scattered by the particles, the size and distribution of the particles are calculated to obtain the particle size of the graphite sample. However, after the detection is completed, a certain amount of graphite particles will remain on the stirring head, and the stirring head needs to be cleaned before the next detection. If multiple graphite samples are continuously detected, the staff needs to wait for the stirring head to be cleaned before the next detection, resulting in poor detection efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser particle size detection device for graphite anode powder to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A laser particle size detection device for graphite anode powder, comprising: a device housing and a control top plate arranged above the device housing. A driving rod and a laser detection head are installed at the bottom of the control top plate. A stirring fan blade is fixedly installed at the bottom of the driving rod. A turntable is rotatably installed at the top of the device housing. Two symmetrically distributed detection cylinders and two symmetrically distributed cleaning cylinders are arranged at the top of the turntable, and the detection cylinders and the cleaning cylinders are arranged in an alternating manner; further comprising: a lifting mechanism for lifting the driving rod upward, the lifting mechanism is installed inside the device housing; a drainage mechanism for draining the solution and water in the detection cylinders and the cleaning cylinders downward, the drainage mechanism is installed at the bottom of the turntable; an avoidance mechanism for improving the safety of lifting the driving rod, the avoidance mechanism is installed inside the device housing.

[0006] Preferably, the lifting mechanism includes a sleeve fixedly installed on the top of the turntable. An annular wavy groove is formed on the outer side of the sleeve. Two symmetrically distributed first sliders are arranged on the outer side of the sleeve. The first sliders are slidably installed inside the annular wavy groove. A sleeve box is installed on the outer side of the first sliders. A support plate is fixedly installed on the top of the sleeve box. A push ring is fixedly installed between the two support plates. The top of the push ring is in contact with the bottom of the control top plate. A guiding sleeve frame is fixedly installed on the top of the device housing. The support plate is slidably installed inside the guiding sleeve frame. A positioning rod is fixedly installed on the bottom of the control top plate. The positioning rod is slidably installed inside the sleeve and slidably penetrates through the turntable. The positioning rod extends to the inside of the device housing. A positioning ring is arranged on the outer side of the positioning rod. A first spring is fixedly installed between the bottom of the positioning ring and the bottom inner wall of the device housing.

[0007] Preferably, the drainage mechanism includes an annular frame fixedly installed on the bottom inner wall of the device housing. A fixed ring is fixedly installed on the top of the annular frame. Bases are fixedly installed at the bottoms of the detection cylinder and the cleaning cylinder. A sealing disc is rotatably installed inside the bases. Drainage holes are formed on the surfaces of the sealing disc and the bases. A driven rod is fixedly installed inside the sealing disc. The driven rod extends below the turntable. A first gear is fixedly installed at the end of the driven rod away from the sealing disc. Two racks matched with the first gear are fixedly installed on the outer side of the fixed ring. A drainage groove is formed on the top of the turntable. A plurality of drain pipes are fixedly installed inside the drainage groove. A blocking cylinder is fixedly installed on the bottom inner wall of the device housing. The top of the blocking cylinder is in contact with the bottom of the turntable. A drainage valve is installed on the outer side of the device housing. A gear motor is fixedly installed on the bottom inner wall of the device housing. A third gear matched with the gear motor is fixedly installed on the bottom of the turntable.

[0008] Preferably, the avoidance mechanism includes a fixed rod fixedly installed on the bottom inner wall of the device housing. A cavity for the limited sliding of the fixed rod is formed at the bottom end of the positioning rod. A plurality of second sliders symmetrically distributed around the center are fixedly installed inside the positioning rod. A plurality of spiral grooves symmetrically distributed around the center are fixedly installed on the outer side of the fixed rod. The second sliders are slidably installed inside the spiral grooves, and the spiral direction of the spiral grooves is the same as the rotation direction of the turntable. An annular cavity is formed inside the positioning ring. A convex ring is rotatably installed inside the annular cavity. The convex ring is fixedly installed on the outer side of the positioning rod. A coil spring is fixedly installed between the outer side of the convex ring and the inner side of the annular cavity.

[0009] Preferably, a positioning shaft is fixedly installed inside the device housing, and an annular groove for installing the positioning shaft is formed on the outer side of the turntable.

[0010] Preferably, a first retaining frame and a second retaining frame are fixedly installed on the top of the turntable, and the second retaining frame is located inside the first retaining frame.

[0011] Preferably, a collar is fixedly installed at the bottom of the turntable, and the collar is slidably installed on the outer side of the positioning rod.

[0012] Preferably, a sliding plate is fixedly installed on the outer side of the first slider, the sliding plate is slidably installed inside the sleeve box, and a second spring is fixedly installed between the outer side of the sliding plate and the inner side of the sleeve box.

[0013] Preferably, a plurality of positioning clamping plates are symmetrically distributed around the center on the outer side of the base, the positioning clamping plates are fixedly installed on the top of the turntable, and a clamping groove for limiting and inserting the positioning clamping plates is formed at the bottom of the base.

[0014] Preferably, a heat dissipation cylinder is fixedly installed on the outer side of the gear motor, and the heat dissipation cylinder is butted against the baffle cylinder through heat conduction fins.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the lifting mechanism of the present invention, the turntable can drive the two detection cylinders and the two cleaning cylinders to rotate and move, and sequentially move below the stirring fan blades. During the rotation of the turntable, the control top plate moves upward, lifting the stirring fan blades and the driving rod upward and then resetting them downward, facilitating the stirring fan blades and the driving rod to enter the detection cylinders and the cleaning cylinders, so as to realize the particle size detection of the graphite sample and the cleaning of the stirring fan blades, thereby achieving the effect of continuous detection.

[0016] Through the drainage mechanism of the present invention, during the movement of the detection cylinders and the cleaning cylinders, the first gear can contact the first rack on the fixed ring, and the first gear can drive the sealing disc to rotate through the driven rod, aligning the drainage holes on the sealing disc with the drainage holes on the base, so that the solution in the detection cylinders and the water in the cleaning cylinders can be drained downward into the device housing. When the first gear contacts the second rack, the drainage holes on the sealing disc are staggered from the drainage holes on the base, thus realizing the sealing of the detection cylinders and the cleaning cylinders, and achieving the effect of facilitating drainage.

[0017] Through the avoidance mechanism of the present invention, when the control top plate drives the positioning rod to move upward, the second slider inside the positioning rod can move along the spiral groove on the fixed rod, and the positioning rod can drive the control top plate to swing, realizing the synchronous swing of the driving rod, facilitating the detection cylinders and the cleaning cylinders to move away from the driving rod, thereby achieving the effect of lifting and avoidance, and improving the safety of the movement of the detection cylinders and the cleaning cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the retaining cylinder and the annular frame in the present invention; Figure 3 This is a schematic diagram of the structure of the first slider and the sleeve in the present invention; Figure 4 This is a schematic diagram of the structure of the turntable and the sealing disc in the present invention; Figure 5 This is a schematic diagram of the structure of the fixing ring and the rack in the present invention; Figure 6 This is a schematic diagram of the structure of the positioning card board and the base in the present invention; Figure 7 This is a schematic diagram of the structure of the positioning ring and the convex ring in the present invention; Figure 8 This is a schematic diagram of the structure of the second slider and the fixing rod in the present invention.

[0019] In the figure: 1, device housing; 2, control top plate; 3, driving rod; 4, stirring fan blade; 5, turntable; 6, detection cylinder; 7, cleaning cylinder; 8, sleeve; 9, first slider; 10, sleeve box; 11, support plate; 12, pushing ring; 13, guiding sleeve frame; 14, positioning rod; 15, positioning ring; 16, first spring; 17, annular frame; 18, fixing ring; 19, base; 20, sealing disc; 21, driven rod; 22, first gear; 23, rack; 24, drain pipe; 25, retaining cylinder; 26, gear motor; 27, third gear; 28, fixing rod; 29, second slider; 30, convex ring; 31, coil spring; 32, positioning shaft; 33, first retaining frame; 34, collar; 35, sliding plate; 36, second spring; 37, positioning card board; 38, heat dissipation cylinder; 39, second retaining frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1: Please refer to Figures 1-8, A laser particle size detection device for graphite anode powder in the illustration, including a device housing 1 and a control top plate 2 arranged above the device housing 1. A driving rod 3 and a laser detection head are installed at the bottom of the control top plate 2. A stirring fan blade 4 is fixedly installed at the bottom of the driving rod 3. The control top plate 2 can drive the driving rod 3 to rotate, so that the driving rod 3 drives the stirring fan blade 4 to rotate. A turntable 5 is rotatably installed at the top of the device housing 1. A positioning shaft 32 is fixedly installed inside the device housing 1. An annular groove for installing the positioning shaft 32 is provided on the outer side of the turntable 5 to improve the stability of the rotation of the turntable 5. Two symmetrically distributed detection cylinders 6 and two symmetrically distributed cleaning cylinders 7 are arranged on the top of the turntable 5. The graphite sample and the solution are loaded into the detection cylinder 6. The graphite sample and the solution are mixed by the stirring fan blade 4, so that the graphite sample is evenly dispersed in the solution. Then, the particle size of the graphite sample is detected by the laser detection head. The detection cylinders 6 and the cleaning cylinders 7 are arranged in an alternating manner. By using the rotation of the turntable 5, the detection cylinders 6 and the cleaning cylinders 7 are sequentially moved below the stirring fan blade 4 to realize the continuous detection of the graphite sample and the cleaning of the stirring fan blade 4; It also includes: a lifting mechanism for lifting the driving rod 3 upward. The lifting mechanism is installed inside the device housing 1.

[0022] The lifting mechanism includes a sleeve 8 fixedly installed on the top of the turntable 5. An annular wavy groove is formed on the outer side of the sleeve 8. Two first sliders 9 are symmetrically arranged on the outer side of the sleeve 8. The first sliders 9 are slidably installed on the inner side of the annular wavy groove. A sleeve box 10 is installed on the outer side of the first sliders 9. A support plate 11 is fixedly installed on the top of the sleeve box 10. A push ring 12 is fixedly installed between the two support plates 11. The top of the push ring 12 is in contact with the bottom of the control top plate 2. A guiding sleeve frame 13 is fixedly installed on the top of the device housing 1. The support plate 11 is slidably installed on the inner side of the guiding sleeve frame 13. When the turntable 5 rotates, the sleeve 8 can push the first slider 9 to move through the annular wavy groove, so that the first slider 9 drives the support plate 11 to move along the inner side of the guiding sleeve frame 13 through the sleeve box 10. When the first slider 9 moves to the top inner wall of the annular wavy groove, the first slider 9 can move downward along the inner side of the annular wavy groove. Then, with the rotation of the turntable 5, the reciprocating up-and-down movement of the first slider 9 is realized. A positioning rod 14 is fixedly installed on the bottom of the control top plate 2. The positioning rod 14 is slidably installed on the inner side of the sleeve 8 and slidably penetrates through the turntable 5. When the control top plate 2 moves, it can drive the positioning rod 14 to move synchronously. The positioning rod 14 can provide auxiliary support for the control top plate 2 and improve the stability when the push ring 12 pushes the control top plate 2 to move. The positioning rod 14 extends to the inner side of the device housing 1. A positioning ring 15 is arranged on the outer side of the positioning rod 14. A first spring 16 is fixedly installed between the bottom of the positioning ring 15 and the bottom inner wall of the device housing 1. When the push ring 12 pushes the control top plate 2 to move upward, the positioning rod 14 can pull the first spring 16 to elongate through the positioning ring 15, so that when the push ring 12 moves downward, it can use the resilience of the first spring 16 to pull the positioning ring 15 downward, and the positioning ring 15 can drive the positioning rod 14 to move downward. A first stop frame 33 and a second stop frame 39 are fixedly installed on the top of the turntable 5. The second stop frame 39 is located inside the first stop frame 33 to prevent the water dripping from the stirring fan blade 4 and the driving rod 3 from flowing out of the turntable 5. A sleeve ring 34 is fixedly installed on the bottom of the turntable 5. The sleeve ring 34 is slidably installed on the outer side of the positioning rod 14 to provide auxiliary support for the positioning rod 14. A sliding plate 35 is fixedly installed on the outer side of the first slider 9. The sliding plate 35 is slidably installed on the inner side of the sleeve box 10. A second spring 36 is fixedly installed between the outer side of the sliding plate 35 and the inner side of the sleeve box 10. Using the elasticity of the second spring 36, the first slider 9 abuts against the annular wavy groove on the sleeve 8.

[0023] Embodiment 2: Please refer to Figures 2-6, this embodiment further explains the first embodiment, the drainage mechanism in the figure includes an annular frame 17 fixedly mounted on the inner wall of the bottom of the device housing 1, a fixing ring 18 is fixedly mounted on the top of the annular frame 17, a base 19 is fixedly mounted on the bottom of the detection cylinder 6 and the cleaning cylinder 7, a sealing disk 20 is rotatably mounted on the inner side of the base 19, and drainage holes are provided on the surfaces of the sealing disk 20 and the base 19. When the sealing disk 20 rotates, the drainage holes on the sealing disk 20 can be aligned with the drainage holes on the base 19, so that the solution in the detection cylinder 6 and the water in the cleaning cylinder 7 are discharged from the drainage holes, and when the drainage holes on the sealing disk 20 and the base 19 are staggered, the sealing disk 20 can seal the drainage holes on the base 19, and the inner side of the sealing disk 20 is fixed A driven rod 21 is fixedly installed, and the driven rod 21 extends to the bottom of the rotating disk 5. A first gear 22 is fixedly installed at one end of the driven rod 21 away from the sealing disk 20. Two racks 23 matching the first gear 22 are fixedly installed on the outer side of the fixing ring 18. When the rotating disk 5 rotates, it can drive the driven rod 21 to move synchronously. When the first gear 22 on the driven rod 21 contacts the first rack 23 on the fixing ring 18, the rack 23 can drive the first gear 22 to rotate, so that the first gear 22 drives the driven rod 21 to rotate, and the driven rod 21 can drive the sealing disk 20 to rotate synchronously, so that the drainage hole on the sealing disk 20 is aligned with the drainage hole on the base 19, so that drainage can be carried out, and when the first gear 22 contacts the second rack 23, the The second rack 23 can drive the first gear 22 to rotate again, so that the drainage hole on the sealing disk 20 is staggered with the drainage hole on the base 19, so as to achieve the sealing of the base 19. A drainage groove is provided on the top of the turntable 5, and a plurality of drainage pipes 24 are fixedly installed on the inner side of the drainage groove. The water discharged from the base 19 can be discharged into the drainage pipe 24 from the drainage groove, so that the cleaned water and the used solution enter the device housing 1. A retaining cylinder 25 is fixedly installed on the bottom inner wall of the device housing 1. The top of the retaining cylinder 25 contacts with the bottom of the turntable 5, so that the cleaned water and the used solution can enter between the retaining cylinder 25 and the inner side of the device housing 1, and a drainage valve is installed on the outer side of the device housing 1. A gear motor 26 is fixedly installed on the bottom inner wall of the device housing 1. A third gear 27 matched with the gear motor 26 is fixedly installed at the bottom. The gear motor 26 can drive the turntable 5 to rotate through the third gear 27 to realize the position replacement of the detection tube 6 and the cleaning tube 7. A plurality of positioning card plates 37 symmetrically distributed in the center are arranged on the outside of the base 19. The positioning card plates 37 are fixedly installed on the top of the turntable 5. A card slot for the positioning card plates 37 to limit the insertion is provided at the bottom of the base 19, so that the turntable 5 can smoothly drive the detection tube 6 and the cleaning tube 7 to move through the positioning card plates 37. A heat dissipation tube 38 is fixedly installed on the outside of the gear motor 26. The heat dissipation tube 38 is connected to the retaining tube 25 through heat-conducting fins, so that the heat dissipation tube 38 can use the water stored between the retaining tube 25 and the device housing 1 to assist in the heat dissipation of the gear motor 26.

[0024] Embodiment 3: Please refer to Figure 2 , Figure 7 and Figure 8 , this embodiment further illustrates other embodiments. The avoidance mechanism in the figure includes a fixed rod 28 fixedly installed on the inner wall of the bottom of the device housing 1. A cavity for the fixed rod 28 to be limited and slide is provided at the bottom end of the positioning rod 14, so that the positioning rod 14 can move upward along the outside of the fixed rod 28. A plurality of second sliders 29 distributed centrosymmetrically are fixedly installed on the inner side of the positioning rod 14. A plurality of spiral grooves distributed centrosymmetrically are fixedly installed on the outside of the fixed rod 28. The second sliders 29 are slidably installed inside the spiral grooves, and the spiral direction of the spiral grooves is the same as the rotation direction of the turntable 5. When the positioning rod 14 moves upward, it can drive the second sliders 29 to move along the inside of the spiral grooves, realizing the rotation of the positioning rod 14. The positioning rod 14 can drive the control top plate 2 to swing. When the turntable 5 drives the detection cylinder 6 and the cleaning cylinder 7 to move, the control top plate 2 can drive the driving rod 3 to move obliquely upward, preventing the inside of the detection cylinder 6 and the cleaning cylinder 7 from colliding with the driving rod 3. An annular cavity is provided inside the positioning ring 15. A convex ring 30 is rotatably installed inside the annular cavity. The convex ring 30 is fixedly installed on the outside of the positioning rod 14. A torsion spring 31 is fixedly installed between the outside of the convex ring 30 and the inside of the annular cavity. The elasticity of the torsion spring 31 can be utilized to facilitate the quick swinging and turning back of the positioning rod 14 when it returns downward.

[0025] Working principle: First, the staff injects the graphite sample and the solution into the detection cylinder 6 directly below the laser detection head on the control top plate 2. The drive rod 3 is started through the control top plate 2, so that the drive rod 3 drives the stirring fan blade 4 to rotate, mixes the graphite sample and the solution, and evenly disperses the graphite sample in the solution. Then, the laser detection head is used to detect the particle size of the graphite sample. Then, the staff starts the gear motor 26, and the gear motor 26 drives the third gear 27 to rotate, so that the third gear 27 drives the turntable 5 to rotate. The turntable 5 drives the base 19 to move through the driven rod 21, so that the four bases 19 drive the two detection cylinders 6 and the two cleaning cylinders 7 to move in a circular motion with the positioning rod 14 as the center. At the same time, the turntable 5 drives the sleeve 8 to rotate synchronously, so that the sleeve 8 can push the first slider 9 to move through the annular wave groove. The first slider 9 drives the support plate 11 to move along the inner side of the guide sleeve frame 13 through the sleeve box 10, so that the support plate 11 drives the push ring 12 to move, and the push ring 12 can push the control top plate 2 to move upward, so that the drive rod 3 at the bottom of the control top plate 2 moves away from the detection cylinder 6 directly below. Moreover, the positioning rod 14 drives the second slider 29 to move along the inner side of the spiral groove, realizing the rotation of the positioning rod 14. The positioning rod 14 can drive the control top plate 2 to swing, so that the control top plate 2 can swing synchronously while driving the drive rod 3 to move upward, preventing the inner sides of the detection cylinder 6 and the cleaning cylinder 7 from colliding with the drive rod 3. The detection cylinder 6 containing the graphite sample and the solution can move away from the drive rod 3. Subsequently, the first slider 9 moves to the top inner wall of the annular wave groove. As the sleeve 8 rotates, the first slider 9 can move downward along the inner side of the annular wave groove, and the control top plate 2 can reset downward, so that the drive rod 3 is inserted into the cleaning cylinder 7. At the same time, the first gear 22 on the driven rod 21 contacts the first rack 23 on the fixed ring 18, so that the rack 23 drives the first gear 22 to rotate. The first gear 22 drives the sealing disc 20 to rotate synchronously through the driven rod 21, so that the drain holes on the sealing disc 20 are aligned with the drain holes on the base 19. The graphite sample and the solution can be discharged downward into the device housing 1. When the first gear 22 contacts the second rack 23, the second rack 23 can drive the first gear 22 to rotate again, so that the drain holes on the sealing disc 20 are staggered from the drain holes on the base 19, realizing the sealing of the base 19. Finally, the staff pours water into the cleaning cylinder 7 and starts the drive rod 3 through the control top plate 2, so that the stirring fan blade 4 rotates in the water, and the stirring fan blade 4 and the drive rod 3 can be cleaned. Thus, as the turntable 5 rotates, the two detection cylinders 6 and the two cleaning cylinders 7 can realize the cyclic process of detection and cleaning, thereby achieving the effect of continuous detection and improving the detection efficiency of multiple batches of graphite samples.

[0026] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite cathode powder laser particle size detection device, characterized in that: include: A device housing (1) and a control top plate (2) arranged above the device housing (1); a driving rod (3) and a laser detection head are installed at the bottom of the control top plate (2); a stirring fan blade (4) is installed at the bottom of the driving rod (3); a turntable (5) is rotatably installed at the top of the device housing (1); and two symmetrically distributed detection cylinders (6) and two symmetrically distributed cleaning cylinders (7) are arranged at the top of the turntable (5); Also includes: A lifting mechanism, used for lifting the driving rod (3) upwards, the lifting mechanism being installed on the inner side of the device housing (1); A drainage mechanism, used to drain the solution and water in the detection cylinder (6) and the cleaning cylinder (7) downwards, the drainage mechanism being installed at the bottom of the turntable (5); The avoidance mechanism is used to improve the safety of lifting the driving rod (3), and the avoidance mechanism is installed on the inner side of the device housing (1).

2. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: The lifting mechanism comprises a sleeve (8) mounted on the top of the turntable (5), the outer side of the sleeve (8) is provided with an annular wave groove, the outer side of the sleeve (8) is provided with two symmetrically distributed first sliders (9), the first sliders (9) are slidably mounted on the inner side of the annular wave groove, a sleeve box (10) is mounted on the outer side of the first slider (9), a support plate (11) is mounted on the top of the sleeve box (10), a push ring (12) is fixedly mounted between the two support plates (11), and the top of the push ring (12) is The support plate (11) is slidably mounted on the inner side of the guide sleeve (13); a positioning rod (14) is mounted on the bottom of the control top plate (2); the positioning rod (14) is slidably mounted on the inner side of the sleeve (8); a positioning ring (15) is arranged on the outer side of the positioning rod (14); and a first spring (16) is installed between the positioning ring (15) and the inner wall of the bottom of the device housing (1).

3. A graphite cathode powder laser particle size detection device according to claim 2, characterized in that: The drainage mechanism comprises an annular frame (17) mounted on the inner wall of the bottom of the device housing (1), a fixing ring (18) being fixedly mounted on the top of the annular frame (17), a base (19) being fixedly mounted on the bottom of each of the detection cylinder (6) and the cleaning cylinder (7), a sealing disk (20) being rotatably mounted on the inner side of the base (19), drainage holes being provided on the surfaces of the sealing disk (20) and the base (19), a driven rod (21) being fixedly mounted on the inner side of the sealing disk (20), and the driven rod A first gear (22) is fixedly mounted on one end of the device housing (21), two racks (23) are fixedly mounted on the outer side of the fixing ring (18), a drainage groove is provided on the top of the turntable (5), a plurality of drainage pipes (24) are fixedly mounted on the inner side of the drainage groove, a retaining cylinder (25) is fixedly mounted on the bottom inner wall of the device housing (1), a gear motor (26) is mounted on the bottom inner wall of the device housing (1), and a third gear (27) matched with the gear motor (26) is fixedly mounted on the bottom of the turntable (5).

4. The graphite cathode powder laser particle size detection device according to claim 3, characterized in that: The avoidance mechanism comprises a fixing rod (28) mounted on the bottom inner wall of the device housing (1); a cavity for limiting the sliding movement of the fixing rod (28) is provided at the bottom end of the positioning rod (14); a plurality of second sliding blocks (29) are fixedly mounted on the inner side of the positioning rod (14); a plurality of spiral grooves are fixedly mounted on the outer side of the fixing rod (28); the second sliding blocks (29) are slidably mounted on the inner side of the spiral grooves, and the spiral direction of the spiral grooves is the same as the rotation direction of the turntable 5; an annular cavity is provided on the inner side of the positioning ring 15; a convex ring (30) is rotatably mounted on the inner side of the annular cavity; the convex ring (30) is fixedly mounted on the outer side of the positioning rod (14); and a coil spring (31) is fixedly mounted between the outer side of the convex ring (30) and the inner side of the annular cavity.

5. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: A positioning shaft (32) is installed on the inner side of the device housing (1), and an annular groove for installing the positioning shaft (32) is provided on the outer side of the rotating disk (5).

6. The graphite cathode powder laser particle size detection device according to claim 2, characterized in that: A first stop frame (33) and a second stop frame (39) are installed on the top of the rotating disk (5), and the second stop frame (39) is located on the inner circle of the first stop frame (33).

7. The graphite cathode powder laser particle size detection device according to claim 2, characterized in that: A collar (34) is installed at the bottom of the rotating disk (5), and the collar (34) is slidably installed on the outside of the positioning rod (14).

8. The graphite cathode powder laser particle size detection device according to claim 2, characterized in that: A slide plate (35) is fixedly mounted on the outer side of the first sliding block (9), and the slide plate (35) is slidably mounted on the inner side of the sleeve box (10). A second spring (36) is mounted between the outer side of the slide plate (35) and the inner side of the sleeve box (10).

9. The graphite cathode powder laser particle size detection device according to claim 3, characterized in that: A plurality of positioning card plates (37) are arranged on the outside of the base (19), the positioning card plates (37) are fixedly mounted on the top of the turntable (5), and a card slot for limiting insertion of the positioning card plates (37) is provided at the bottom of the base (19).

10. The graphite cathode powder laser particle size detection device according to claim 3, characterized in that: A heat dissipation cylinder (38) is installed on the outer side of the gear motor (26), and the heat dissipation cylinder (38) is butt-jointed with the retaining cylinder (25) via heat-conducting fins.

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