A graphite cathode powder laser particle size detection device

Abstract

The present invention discloses a laser particle size detection device for graphite negative electrode powder, which relates to the field of particle size detection and solves the problem that existing particle size detection devices are difficult to continuously detect multiple batches of graphite samples. The device comprises: 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 installed at the bottom of the driving rod, a turntable is rotatably installed on the top of the device housing, and two symmetrically distributed detection cylinders and two symmetrically distributed cleaning cylinders are provided on the top of the turntable; the device also comprises: a lifting mechanism for lifting the driving rod upward, and the lifting mechanism is installed on the inner side of the device housing; the present invention uses the lifting mechanism to lift the stirring fan blade and the driving rod upward and reset them downward during the rotation of the turntable, so that the stirring fan blade and the driving rod are convenient to enter the detection cylinder and the cleaning cylinder, thereby realizing the particle size detection of the graphite sample and the cleaning of the stirring fan blade, thereby achieving the effect of continuous detection.

Description

Technical Field

[0001] The invention relates to the field of particle size detection, in particular to a graphite cathode powder laser particle size detection device. Background Art

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

[0003] Particle size detection is a key step in the production of graphite negative electrode powder, which directly affects the compaction density, rate performance and cycle life of the battery. Laser scattering is usually used to determine the size and distribution of graphite negative electrode powder. The graphite sample is evenly dispersed in the solution, and then the laser is focused on the graphite negative electrode powder in the solution. The size and distribution of the particles are calculated by detecting the light scattered by the particles. When testing the graphite sample, the graphite sample needs to be poured into a test cup filled with solution. The graphite sample is dispersed in the solution by rotating the stirring head. The size and distribution of the particles are calculated by detecting the light scattered by the particles to obtain the particle size of the graphite sample. However, after the test is completed, a certain amount of graphite particles will remain on the stirring head, and the stirring head needs to be cleaned before re-testing. If multiple graphite samples are tested continuously, the staff needs to wait until the stirring head is cleaned before re-testing, and the detection efficiency is poor. Summary of the Invention

[0004] The object of the present invention is to provide a graphite negative electrode powder laser particle size detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A graphite negative electrode powder laser particle size detection device comprises: 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 on the top of the device housing, two symmetrically distributed detection cylinders and two symmetrically distributed cleaning cylinders are provided on the top of the turntable, and the detection cylinders and the cleaning cylinders are staggered; it also includes: a lifting mechanism for lifting the driving rod upward, the lifting mechanism is installed on the inner side of the device housing; a drainage mechanism for draining the solution and water in the detection cylinder and the cleaning cylinder 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 on the inner side of the device housing.

[0007] Preferably, the lifting mechanism includes a sleeve fixedly mounted on the top of the turntable, the outer side of the sleeve is provided with an annular wave groove, the outer side of the sleeve is provided with two symmetrically distributed first sliders, the first slider is slidably mounted on the inner side of the annular wave groove, a sleeve box is installed on the outer side of the first slider, a support plate is fixedly mounted on the top of the sleeve, a push ring is fixedly mounted between the two support plates, the top of the push ring contacts the bottom of the control top plate, a guide sleeve is fixedly mounted on the top of the device housing, the support plate is slidably mounted on the inner side of the guide sleeve, a positioning rod is fixedly mounted on the bottom of the control top plate, the positioning rod is slidably mounted on the inner side of the sleeve, and the positioning rod slides through the turntable, the positioning rod extends to the inner side of the device housing, a positioning ring is provided on the outer side of the positioning rod, and a first spring is fixedly mounted between the bottom of the positioning ring and the bottom inner wall of the device housing.

[0008] The top of the drain plug is fixedly mounted on the drain plug, and the top of the drain plug is connected to the drain plug, and the drain plug is connected to the drain plug's inner wall. The drain plug is fixedly mounted on the drain plug, and the top of the drain plug is in contact with the bottom of the drain disk. A drain valve is installed on the outside of the device shell, and a gear motor is fixedly mounted on the bottom inner wall of the device shell, and a third gear that cooperates with the gear motor is fixedly mounted on the bottom of the turntable.

[0009] Preferably, the avoidance mechanism includes a fixed rod fixedly mounted on the inner wall of the bottom bottom of the device housing, a cavity is provided at the bottom end of the positioning rod for limiting the sliding of the fixed rod, a plurality of second sliders are fixedly mounted on the inner side of the positioning rod and a plurality of spiral grooves are fixedly mounted on the outer side of the fixing rod and are symmetrically distributed in the center, the second sliders are slidably mounted on the inner side of the spiral groove, and the spiral direction of the spiral groove is the same as the rotation direction of the turntable, an annular cavity is provided on the inner side of the positioning ring, a convex ring is rotatably mounted on the inner side of the annular cavity, the convex ring is fixedly mounted on the outer side of the positioning rod, and a coil spring is fixedly mounted between the outer side of the convex ring and the inner side of the annular cavity.

[0010] Preferably, a positioning shaft is fixedly mounted on the inner side of the device housing, and an annular groove for mounting the positioning shaft is formed on the outer side of the turntable.

[0011] Preferably, a first stop frame and a second stop frame are fixedly mounted on the top of the turntable, and the second stop frame is located in the inner circle of the first stop frame.

[0012] Preferably, a collar is fixedly mounted on the bottom of the turntable, and the collar is slidably mounted on the outer side of the positioning rod.

[0013] Preferably, a slide plate is fixedly mounted on the outer side of the first sliding block, the slide plate is slidably mounted on the inner side of the sleeve, and a second spring is fixedly mounted between the outer side of the slide plate and the inner side of the sleeve.

[0014] Preferably, a plurality of positioning cards distributed symmetrically with respect to the center are provided on the outer side of the base, the positioning cards are fixedly mounted on the top of the turntable, and a card slot for limiting insertion of the positioning cards is provided on the bottom of the base.

[0015] Preferably, a heat dissipation cylinder is fixedly mounted on the outer side of the gear motor, and the heat dissipation cylinder is connected to the retaining cylinder via heat conducting fins.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention uses a lifting mechanism to enable the turntable to drive the two detection cylinders and the two cleaning cylinders to rotate and move, and move them to the bottom of the stirring blades in turn. During the rotation of the turntable, the control top plate moves upward, the stirring blades and the driving rod are lifted upward and reset downward, so that the stirring blades and the driving rod can enter the detection cylinder and the cleaning cylinder easily, thereby realizing the particle size detection of the graphite sample and the cleaning of the stirring blades, thereby achieving the effect of continuous detection.

[0018] The present invention uses a drainage mechanism to make the first gear contact with the first rack on the fixed ring during the movement of the detection cylinder and the cleaning cylinder. The first gear can drive the sealing disk to rotate through the driven rod, so that the drainage hole on the sealing disk is aligned with the drainage hole on the base. The solution in the detection cylinder and the water in the cleaning cylinder can be discharged downward into the device housing. When the first gear contacts the second rack, the drainage hole on the sealing disk and the drainage hole on the base are staggered, so that the detection cylinder and the cleaning cylinder can be sealed, thereby achieving the effect of facilitating drainage.

[0019] The present invention uses an avoidance mechanism to enable the second sliding block inside the positioning rod to move along the spiral groove on the fixed rod when the control top plate drives the positioning rod to move upward. The positioning rod can drive the control top plate to swing, thereby realizing the synchronous swing of the driving rod, making it easier for the detection cylinder and the cleaning cylinder to move away from the driving rod, thereby achieving the effect of lifting and avoiding, and improving the safety of the movement of the detection cylinder and the cleaning cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the retaining cylinder and the annular frame structure of the present invention;

[0022] Figure 3 Schematic diagram of the first slider and sleeve structure in the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the rotary disk and the sealing disk in the present invention;

[0024] Figure 5 Schematic diagram of the fixed ring and rack structure in the present invention;

[0025] Figure 6 This is a schematic diagram of the positioning card and base structure in the present invention;

[0026] Figure 7 Schematic diagram of the positioning ring and convex ring structure in the present invention;

[0027] Figure 8 Schematic diagram of the second sliding block and the fixing rod structure in the present invention.

[0028] In the figure: 1. device housing; 2. control top plate; 3. drive 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. push ring; 13. guide sleeve; 14. positioning rod; 15. positioning ring; 16. first spring; 17. annular frame; 18. fixing ring; 19. base; 20. sealing disk; 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 stop frame; 34. sleeve ring; 35. slide plate; 36. second spring; 37. positioning card plate; 38. heat dissipation cylinder; 39. second stop frame. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1-8 The graphite negative electrode powder laser particle size detection device shown in the figure includes 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 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 blade 4 to rotate. A turntable 5 is rotatably installed on the top of the device housing 1. A positioning shaft 32 is fixedly installed on the inner side of the device housing 1. An annular groove for the positioning shaft 32 is opened on the outer side of the turntable 5 to improve the stability of the rotation of the turntable 5. The top of the turntable 5 is provided with two A symmetrically distributed detection cylinder 6 and two symmetrically distributed cleaning cylinders 7 are provided. The graphite sample and the solution are loaded into the detection cylinder 6. The graphite sample and the solution are mixed by the stirring blade 4 so that the graphite sample is evenly dispersed in the solution. The particle size of the graphite sample is then detected by the laser detection head. The detection cylinder 6 and the cleaning cylinder 7 are staggered. The rotation of the turntable 5 moves the detection cylinder 6 and the cleaning cylinder 7 to the bottom of the stirring blade 4 in turn, thereby realizing continuous detection of the graphite sample and cleaning of the stirring blade 4. It also includes: a lifting mechanism for lifting the drive rod 3 upward, and the lifting mechanism is installed on the inner side of the device housing 1.

[0031] The lifting mechanism includes a sleeve 8 fixedly mounted on the top of the turntable 5, an annular wave groove is provided on the outside of the sleeve 8, two symmetrically distributed first sliders 9 are provided on the outside of the sleeve 8, the first slider 9 is slidably mounted on the inner side of the annular wave groove, a sleeve box 10 is installed on the outside of the first slider 9, a support plate 11 is fixedly mounted on the top of the sleeve box 10, a push ring 12 is fixedly mounted 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 guide sleeve 13 is fixedly mounted on the top of the device housing 1, and the support plate 11 is slidably mounted on the inner side of the guide sleeve 13. When the turntable 5 rotates, the sleeve 8 can pass through the annular wave groove. The annular wave groove pushes the first slider 9 to move, so that the first slider 9 drives the support plate 11 to move along the inner side of the guide sleeve 13 through the sleeve box 10, and when the first slider 9 moves to the top inner wall of the annular wave groove, the first slider 9 can move downward along the inner side of the annular wave groove. Then, as the turntable 5 rotates, the first slider 9 is reciprocated up and down. A positioning rod 14 is fixedly installed at the bottom of the control top plate 2. The positioning rod 14 is slidably installed on the inner side of the sleeve 8, and the positioning rod 14 slides 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 for the control top plate 2. The auxiliary support improves the stability of the push ring 12 when pushing 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 provided 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 extend through the positioning ring 15, so that when the push ring 12 moves downward, the rebound force of the first spring 16 can be used to pull the positioning ring 15 downward, and the positioning ring 15 can drive the positioning rod 14 to move downward. The top of the turntable 5 is fixedly installed with The first baffle 33 and the second baffle 39, the second baffle 39 is located in the inner circle of the first baffle 33, to prevent water dripping from the stirring blades 4 and the driving rod 3 from flowing outward from the turntable 5, the bottom of the turntable 5 is fixedly installed with a collar 34, the collar 34 is slidably installed on the outside of the positioning rod 14, so that the collar 34 provides auxiliary support for the positioning rod 14, the outside of the first slider 9 is fixedly installed with a slide plate 35, the slide plate 35 is slidably installed on the inside of the sleeve 10, and a second spring 36 is fixedly installed between the outside of the slide plate 35 and the inside of the sleeve 10. The elasticity of the second spring 36 is used to make the first slider 9 press against the annular wave groove on the sleeve 8.

[0032] Example 2: Please refer to Figure 2-Figure 6, this embodiment further explains Example 1, 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, and the bottom of the detection cylinder 6 and the cleaning cylinder 7 are fixedly mounted with a base 19, and a sealing disk 20 is rotatably mounted on the inner side of the base 19. The surface of the sealing disk 20 and the surface of the base 19 are both provided with drainage holes. 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 sealing disk 20 and the drainage holes on the base 19 are staggered, the sealing disk 20 can seal the drainage holes of 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 turntable 5. A first gear 22 is fixedly installed on the end of the driven rod 21 away from the sealing disk 20. Two racks 23 that cooperate with the first gear 22 are fixedly installed on the outer side of the fixing ring 18. When the turntable 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, thereby achieving 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 from the drainage groove into the drainage pipe 24, so that the cleaned water and the solution after use 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 the bottom of the turntable 5, so that the cleaned water and the solution after use can enter between the retaining cylinder 25 and the inner side of the device housing 1, and a drain valve is installed on the outside 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 that cooperates 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 cylinder 6 and the cleaning cylinder 7. A plurality of positioning card plates 37 that are symmetrically distributed in the center are provided 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 limiting the insertion of the positioning card plates 37 is provided at the bottom of the base 19, so that the turntable 5 can smoothly drive the detection cylinder 6 and the cleaning cylinder 7 to move through the positioning card plates 37. A heat dissipation cylinder 38 is fixedly installed on the outside of the gear motor 26. The heat dissipation cylinder 38 is docked with the retaining cylinder 25 through heat-conducting fins, so that the heat dissipation cylinder 38 can use the water stored between the retaining cylinder 25 and the device housing 1 to assist in dissipating the heat of the gear motor 26.

[0033] Example 3: Please refer to Figure 2 、 Figure 7 and Figure 8 , this embodiment is further explained for other embodiments. The avoidance mechanism shown in the figure includes a fixed rod 28 fixedly mounted on the inner wall of the bottom of the device housing 1. The bottom end of the positioning rod 14 is provided with a cavity for the fixed rod 28 to slide within a limited position, so that the positioning rod 14 can move upward along the outer side of the fixed rod 28. A plurality of second sliders 29 symmetrically distributed in the center are fixedly mounted on the inner side of the positioning rod 14. A plurality of spiral grooves symmetrically distributed in the center are fixedly mounted on the outer side of the fixing rod 28. The second slider 29 is slidably mounted on the inner side of the spiral groove, and the spiral direction of the spiral groove is the same as the rotation direction of the turntable 5, so that when the positioning rod 14 moves upward, it can drive the second slider 29 along The inner side of the spiral groove moves to realize the rotation of the positioning rod 14, and 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 upward in an inclined state to prevent the inner side of the detection cylinder 6 and the cleaning cylinder 7 from colliding with the driving rod 3. An annular cavity is provided on the inner side of the positioning ring 15, and a convex ring 30 is rotatably installed 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. The elasticity of the coil spring 31 can be used to facilitate the positioning rod 14 to quickly swing back when it is reset downward.

[0034] Working principle: First, the staff injects the graphite sample and solution into the detection cylinder 6 just below the laser detection head on the control top plate 2, and starts the driving rod 3 by controlling the top plate 2, so that the driving rod 3 drives the stirring blade 4 to rotate, and mixes the graphite sample and the solution, so that the graphite sample is evenly dispersed in the solution, and then the particle size of the graphite sample is detected by the laser detection head. 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, and the turntable 5 drives the base 19 to move through the driven rod 21, so that the four bases 19 respectively drive the two detection cylinders 6 and the two cleaning cylinders 7 to do 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, and the first slider 9 drives the support plate 11 to move along the inner side of the guide sleeve 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 driving rod 3 at the bottom of the control top plate 2 is away from the detection cylinder 6 just below, and the positioning rod 14 drives the second slider 29 to move along the inner side of the spiral groove to realize 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 drive the driving rod 3 to swing synchronously during the upward movement, preventing the detection cylinder 6 from colliding with the cleaning cylinder. The inner side of 7 collides with the driving rod 3, and the detection cylinder 6 containing the graphite sample and the solution can move away from the driving 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 be reset downward, so that the driving 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, and the first gear 22 drives the sealing disk 20 to rotate synchronously through the driven rod 21, so that the drainage hole on the sealing disk 20 is aligned with the drainage hole on the base 19, and the graphite sample and the solution are detected. The solution can be discharged downward into the device housing 1, and 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 drainage hole on the sealing disk 20 is staggered with the drainage hole on the base 19, thereby achieving sealing of the base 19. Finally, the staff pours water into the cleaning cylinder 7, and starts the driving rod 3 by controlling the top plate 2 to rotate the stirring blade 4 in the water, so that the stirring blade 4 and the driving rod 3 can be cleaned. Therefore, as the turntable 5 rotates, the two detection cylinders 6 and the two cleaning cylinders 7 can realize the cycle process of detection and cleaning, thereby achieving the effect of continuous detection and improving the detection efficiency of multiple batches of graphite samples.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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: The 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 installed at the bottom of the driving rod, a turntable is rotatably installed on the top of the device housing, and two symmetrically distributed detection cylinders and two symmetrically distributed cleaning cylinders are arranged on the top of the turntable; Also includes: The lifting mechanism is used to lift the driving rod upward, and the lifting mechanism is installed on the inner side of the device shell. The lifting mechanism includes a sleeve installed on the top of the turntable, an annular wave groove is opened on the outer side of the sleeve, and two symmetrically distributed first sliders are provided on the outer side of the sleeve. The first slider is slidably installed on the inner side of the annular wave groove, a sleeve box is installed on the outer side of the first slider, a support plate is installed on the top of the sleeve, a push ring is fixedly installed between the two support plates, and the top of the push ring contacts the bottom of the control top plate, a guide sleeve is installed on the top of the device shell, the support plate is slidably installed on the inner side of the guide sleeve, a positioning rod is installed on the bottom of the control top plate, the positioning rod is slidably installed on the inner side of the sleeve, a positioning ring is provided on the outer side of the positioning rod, and a first spring is installed between the positioning ring and the bottom inner wall of the device shell; The drainage mechanism is used to drain the solution and water in the detection cylinder and the cleaning cylinder downwards. The drainage mechanism is installed at the bottom of the turntable; The avoidance mechanism is used to improve the safety of lifting the driving rod. The avoidance mechanism is installed on the inner side of the device shell. The avoidance mechanism includes a fixed rod installed on the inner wall of the bottom of the device shell. The bottom end of the positioning rod is provided with a cavity for the fixed rod to slide within a limited position. A plurality of second sliders are fixedly installed on the inner side of the positioning rod, and a plurality of spiral grooves are fixedly installed on the outer side of the fixed rod. The second sliders are slidably installed on the inner side of the spiral groove, and the spiral direction of the spiral groove is the same as the rotation direction of the turntable. An annular cavity is provided on the inner side of the positioning ring, and a convex ring is rotatably installed on the inner side of the annular cavity. The convex ring is fixedly installed on the outer side of the positioning rod, and a coil spring is fixedly installed between the outer side of the convex ring and the inner side of the annular cavity.

2. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: The drainage mechanism includes an annular frame installed on the inner wall of the bottom of the device shell, a fixing ring is fixedly installed on the top of the annular frame, a base is fixedly installed on the bottom of the detection cylinder and the cleaning cylinder, a sealing disk is rotatably installed on the inner side of the base, and drainage holes are provided on the surface of the sealing disk and the surface of the base, a driven rod is fixedly installed on the inner side of the sealing disk, a first gear is fixedly installed on one end of the driven rod, two racks are fixedly installed on the outer side of the fixing ring, a drainage groove is provided on the top of the turntable, and a plurality of drainage pipes are fixedly installed on the inner side of the drainage groove, a retaining cylinder is fixedly installed on the inner wall of the bottom of the device shell, a gear motor is installed on the inner wall of the bottom of the device shell, and a third gear matching the gear motor is fixedly installed on the bottom of the turntable.

3. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: A positioning shaft is installed on the inner side of the device shell, and an annular groove for installing the positioning shaft is opened on the outer side of the turntable.

4. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: A first stop frame and a second stop frame are installed on the top of the turntable, and the second stop frame is located in the inner circle of the first stop frame.

5. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: A collar is installed at the bottom of the turntable, and the collar is slidably installed on the outer side of the positioning rod.

6. The graphite cathode powder laser particle size detection device according to claim 1, characterized in that: A slide plate is fixedly mounted on the outer side of the first sliding block, the slide plate is slidably mounted on the inner side of the sleeve box, and a second spring is mounted between the outer side of the slide plate and the inner side of the sleeve box.

7. The graphite cathode powder laser particle size detection device according to claim 2, characterized in that: A plurality of positioning cards are arranged on the outside of the base, the positioning cards are fixedly mounted on the top of the turntable, and a card slot for limiting and inserting the positioning cards is opened at the bottom of the base.

8. The graphite cathode powder laser particle size detection device according to claim 2, characterized in that: A heat dissipation cylinder is installed on the outer side of the gear motor, and the heat dissipation cylinder is connected to the retaining cylinder through heat conduction fins.

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