Lithium battery material grinding machine

Abstract

The lithium battery material grinding machine comprises a machine body, a grinding disc, a grinding ring, a rotary driving mechanism, a material guide cylinder, a main shaft, a first fan blade, a grader and a feeding pipeline, a hollow cavity is formed in the machine body, an air inlet is formed in the lower end of the cavity, and a discharge port is formed in the upper end of the cavity; the feeding pipeline is arranged on the outer side of the machine body and extends into the guide cylinder; the grinding disc is rotationally arranged in the cavity, the grinding ring is fixed to the inner wall of the cavity and located on the periphery of the grinding disc, and the material guide barrel is arranged in the cavity and located above the grinding disc; a filter screen is arranged in the guide cylinder, and the grader is arranged at the discharge port and located above the guide cylinder; the grinding disc is connected to the main shaft, the first fan blade is arranged in the material guide barrel and connected with the main shaft, and the first fan blade is located above the filter screen; and the output end of the rotary driving mechanism is connected with the main shaft. The lithium battery material grinding machine has the advantages of being high in grinding efficiency and good in grinding effect.

Description

Technical Field

[0001] The invention relates to a powder grinder, in particular to a lithium battery material grinder with high grinding efficiency and good grinding effect. Background Art

[0002] With the development of new energy, people's demand for lithium batteries is becoming more and more vigorous, and the quality requirements for lithium batteries are getting higher and higher. Therefore, in the process of producing lithium batteries, the production process of lithium battery materials is particularly important. The grinding of lithium battery materials is an important part of it. The existing lithium battery material grinding process is: the driving motor drives the grinding disc and the grinding head to rotate at high speed, and the lithium battery material enters from the feed port and is ground into smaller particles through the gap between the grinding head and the grinding circle, and finally the lithium battery material powder is discharged from the discharge port. However, since some lithium battery materials are easily absorbent, they are easy to agglomerate or clump after being exposed to the air for a period of time. If these agglomerated materials are directly poured into the existing grinder for grinding, the agglomerated materials may not be able to enter the gap between the grinding head and the grinding circle due to their large volume, and finally they will accumulate on the grinding disc. Therefore, it is easy to cause the grinding head to run idle, resulting in low grinding efficiency and unsatisfactory grinding effect. Summary of the invention

[0003] The object of the present invention is to provide a lithium battery material grinder with high grinding efficiency and good grinding effect.

[0004] In order to achieve the above-mentioned purpose, the lithium battery material grinding machine provided by the present invention includes a machine body, a grinding disc, a grinding ring, a rotating drive mechanism, a material guide cylinder, a main shaft, a first fan blade, a classifier and a feed pipe; a hollow cavity is provided in the machine body, an air inlet is provided at the lower end of the cavity, and a discharge port is provided at the upper end; the feed pipe is arranged on the outside of the machine body and extends into the material guide cylinder; the grinding disc is rotatably arranged in the cavity, the grinding ring is fixed to the inner wall of the cavity and is located at the outer periphery of the grinding disc, and the material guide cylinder is arranged inside the cavity. The material guide cylinder is provided with a filter screen; the classifier is arranged at the discharge port and is located above the material guide cylinder; the grinding disc is connected to the main shaft, the first fan blade is arranged in the material guide cylinder and connected to the main shaft, and the first fan blade is located above the filter screen; the rotary drive mechanism is arranged on the lower side of the machine body and the output end is connected to the main shaft to drive the main shaft to rotate, so that the first fan blade rotates and breaks up the lithium battery material and the grinding disc rotates and grinds the lithium battery material.

[0005] Compared with the prior art, the present invention utilizes the main shaft to drive the grinding disc to rotate, so that the grinding disc and the grinding ring rotate relative to each other to achieve the purpose of grinding the lithium battery material; and by arranging a first fan blade and a filter screen in the material guide cylinder, the filter screen can effectively prevent large pieces of agglomerated materials from falling onto the grinding disc and causing accumulation, so that the agglomerated materials can stay near the first fan blade, and then the first fan blade is connected to the main shaft, and the main shaft is used to drive the first fan blade to rotate, so that the agglomerated lithium battery material can be broken up by the first fan blade before the lithium battery material enters the grinding disc. Therefore, the volume of the lithium battery material when it falls into the grinding disc is smaller, thereby preventing the agglomerated material from accumulating on the grinding disc and unable to enter the gap between the grinding disc and the grinding ring, ensuring that the lithium battery material in the cavity flows smoothly to the gap between the grinding disc and the grinding ring during grinding, thereby improving the grinding efficiency, and fine grinding is performed on the premise of pre-grinding by the first fan blade, so that the grinding effect is better.

[0006] Preferably, the lithium battery material grinder further comprises a second fan blade, which is connected to the main shaft and located between the first fan blade and the filter screen to further break up the lithium battery material. By providing the second fan blade, it can cooperate with the first fan blade to break up the agglomerated material more quickly, which is conducive to improving the material feeding speed and grinding effect.

[0007] Preferably, the bottom surface of the cavity is a cone structure, and air intake blades are arranged around the bottom surface of the grinding disc, and the air intake blades generate an airflow that flows upward toward the gap between the grinding disc and the grinding ring along the cone surface of the cone structure as the grinding disc rotates. By providing air intake blades and using the air intake blades to generate an airflow blowing toward the gap, it is possible to prevent the powder in the gap from flowing downward to the air inlet, and to generate an airflow blowing upward at the gap, thereby making it easier to form a stable circulating airflow in the cavity, which is beneficial to improving the grinding efficiency.

[0008] Preferably, first grinding heads are fixedly provided around the surface of the grinding disc, and the first grinding heads are opposite to the inner side wall of the grinding ring.

[0009] Specifically, the upper end of the first grinding head is fixedly connected with a second grinding head, and the second grinding head is located above the gap between the first grinding head and the grinding ring and is set with a gap between the upper side wall of the grinding ring and the inner side wall of the cavity. In this way, by utilizing the rotational driving force of the main shaft to simultaneously drive the second grinding head to rotate relative to the grinding ring, the powder flowing upward from the gap between the grinding disc and the grinding ring can be ground, thereby further improving the grinding efficiency and grinding quality.

[0010] Specifically, an extending direction of a gap between the second grinding head and an upper side wall of the grinding ring is perpendicular to an extending direction of a gap between the first grinding head and an inner side of the grinding ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the lithium battery material grinder of the present invention.

[0012] Figure 2 It is a structural diagram of the grinding disc of the lithium battery material grinding machine of the present invention being installed in the cavity.

[0013] Figure 3 It is a structural diagram of the grinding disc of the lithium battery material grinder of the present invention.

[0014] Figure 4 It is a flow diagram of powder when the lithium battery material grinder of the present invention is grinding. DETAILED DESCRIPTION

[0015] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0016] like Figure 1 and Figure 2 As shown, the lithium battery material grinding machine 100 of the present invention includes a body 1, a grinding disc 2, a grinding ring 3, a rotary drive mechanism 4, a material guide barrel 5, a main shaft 6, a first fan blade 7, a classifier 8 and a feed pipe 9; the body 1 is a cylindrical structure, and a hollow cavity 11 is provided in the body 1, and an air inlet 12 is provided at the lower end of the cavity 11, and a discharge port 13 is provided at the upper end; the upper end of the material guide barrel 5 is a cylindrical structure, and the lower end is an inverted cone structure, and the upper and lower ends of the material guide barrel 5 are both open. The feed pipe 9 is arranged outside the body 1 and extends into the material guide barrel 5, so that the lithium battery material is discharged from the feed pipe 9 to the material guide barrel 5. The grinding disc 2 is rotatably arranged in the cavity 11, and the grinding ring 3 is fixed to the inner wall of the cavity 11 and is located at the outer periphery of the grinding disc 2, and the grinding disc 2 and the grinding ring 3 are arranged concentrically. The material guide barrel 5 is arranged inside the cavity 11 and is located above the grinding disc 2. The classifier 8 is arranged at the discharge port 13 and is located directly above the material guide barrel 5. The grinding disc 2 is connected to the main shaft 6, and the main shaft 6 is coaxially arranged with the central axis of the machine body 1. The main shaft 6 extends into the material guide barrel 5 through the air inlet 12. The first fan blade 7 is arranged in the material guide barrel 5 and is connected to the main shaft 6. The rotary drive mechanism 4 is arranged on the lower side of the machine body 1 and the output end is connected to the main shaft 6 to drive the main shaft 6 to rotate, so that the first fan blade 7 rotates and breaks up the lithium battery material and the grinding disc 2 rotates and grinds the lithium battery material. The rotary drive mechanism 4 is a motor.

[0017] See also Figure 1 and Figure 2, the lithium battery material grinder 100 also includes a second fan blade 10, which is connected to the main shaft 6 and is located below the first fan blade 7 to further break up the lithium battery material. The first fan blade 7 and the second fan blade 10 drive the lithium battery material downward. The blades of the second fan blade 10 are staggered with the blades of the first fan blade 7. By setting the second fan blade 10, the second fan blade 10 can cooperate with the first fan blade 7 to break up the agglomerated material more quickly, which is beneficial to improve the feeding speed and grinding effect. In addition, a filter screen 110 is provided in the material guide barrel 5, and the filter screen 110 is located below the second fan blade 10. By setting the filter screen 110, it is possible to effectively prevent large pieces of agglomerated materials from falling onto the grinding disc 2 and causing accumulation, and to allow the agglomerated materials to remain near the first blade 7 and the second blade 10 and be continuously broken up by the first blade 7 and the second blade 10, thereby ensuring that the volume of the material falling onto the grinding disc 2 is small, which is conducive to its entering the gap 2a between the grinding disc 2 and the grinding circle 3, further improving the grinding effect.

[0018] Please see again Figure 1 and Figure 2, the diameter of the upper end of the guide barrel 5 is larger than the diameter of the inlet of the classifier 8. The inlet of the classifier 8 of the present application is located on the outer peripheral side wall, and the diameter of the guide barrel 5 is larger than the circumferential diameter of the outer periphery of the classifier. The upper end of the guide barrel 5 extends upward to the horizontal position of the inlet of the classifier 8. In this way, the large particle materials filtered out by the classifier 8 can be effectively received, so that the large particle materials can re-enter the grinding disc 2 for grinding. The height and diameter of the conventional guide barrel 5 are both small. The particle mixed airflow flowing upward from the gap 2a between the grinding disc 2 and the grinding ring 3 may flow to the outside of the guide barrel 5 after rising to the classifier 8 and then falling down, and then it is possible to flow to the outside of the guide barrel 5, and then be blown upward again by the airflow in the gap 2a, and it is impossible to re-enter the grinding disc 2 for grinding in such a cycle. Therefore, by extending the guide barrel 5 to the horizontal position of the inlet of the classifier 8 and increasing its diameter to be larger than the diameter of the classifier 8 and smaller than the diameter of the cavity 11, an air outlet 5a is formed between the edge of the guide barrel 5 and the inner wall of the cavity 11. When the particle mixed airflow is blown out from the air outlet, it can directly reach the inlet of the classifier 8 and be sorted, and the larger particles just fall down after being filtered out by the classifier and just re-enter the guide barrel 5 to avoid falling on the gap 2a between the grinding disc 2 and the grinding ring 3. At the same time, driven by the first blade 7 and the second blade 10, the first blade 7 and the second blade 10 can make the airflow in the guide barrel 5 flow from top to bottom, so that the airflow of the entire cavity 11 truly forms a circulating airflow with the airflow upward at the periphery of the guide barrel 5 and the airflow downward in the middle of the guide barrel 5, ensuring that the larger particles can flow back to the grinding disc 2 every time, and then continuously circulate and grind, greatly improving the grinding efficiency and grinding effect. In addition, the top of the cavity 11 is located around the inlet of the classifier 8 and is provided with a guide plate 14 for guiding the powder to enter the classifier 8. The guide plate 14 is arranged to be inclined downward from one end close to the classifier 8 to one end close to the inner wall of the cavity 11. The entire guide plate 14 is a cone-shaped structure. Providing the guide plate 14 can make the powder flow smoother and make the circulating airflow in the cavity 11 more stable.

[0019] Please see again Figure 1 and Figure 2The bottom surface of the cavity 11 is a cone structure, and the cone surface 15 extends from the downwardly inclined inner wall of the cavity 11 to the middle part. The bottom surface of the grinding disc 2 is evenly provided with air intake blades 120 around the central axis. The air intake blades 120 generate an airflow that flows upward toward the gap 2a between the grinding disc 2 and the grinding ring 3 along the cone surface 15 of the cone structure as the grinding disc 2 rotates. By providing the air intake blades 120, the air intake blades 120 are used to generate an airflow blowing toward the gap 2a, which can prevent the powder in the gap 2a from flowing downward to the air inlet 12, and can also generate an airflow blowing upward at the gap 2a, so that it is easier to form a stable circulating airflow in the cavity 11, which is conducive to improving the grinding efficiency.

[0020] like Figure 3 As shown, the surface of the grinding disc 2 is fixedly provided with a first grinding head 21 around the periphery, and the first grinding head 21 is opposite to the inner side wall of the grinding ring 3. The upper end of the first grinding head 21 is fixedly connected with a second grinding head 22, and the second grinding head 22 is located above the gap 2a between the first grinding head 21 and the grinding ring 3 and is provided with a gap 2b with the upper side wall of the grinding ring 3 and the inner side wall of the cavity 11. In this way, by utilizing the rotational driving force of the spindle 6 to simultaneously drive the second grinding head 22 to rotate relative to the grinding ring 3, the powder flowing upward from the gap 2a between the grinding disc 2 and the grinding ring 3 can be ground, thereby further improving the grinding efficiency and grinding quality. The extension direction of the gap 2b between the second grinding head 22 and the upper side wall of the grinding ring 3 is perpendicular to the extension direction of the gap 2a between the first grinding head 21 and the inner side of the grinding ring 3.

[0021] Combining the above and Figure 4 , the working principle of the present invention is described in detail below, as follows:

[0022] During grinding, the rotary drive mechanism 4 is first started to drive the grinding disc 2, the first blade 7 and the second blade 10 to rotate through the main shaft 6. At the same time, the classifier 8 is started to generate negative pressure at the inlet. At this time, the airflow is blown upward from the gap 2a between the grinding disc 2 and the inner wall of the cavity 11, and flows upward to the inlet of the classifier 8 under the negative pressure of the classifier 8, while the first blade 7 and the second blade 10 generate an airflow from top to bottom in the guide barrel 5, and the airflow on the grinding disc 2 flows from the middle to the periphery under the action of centrifugal force. Therefore, a circulating airflow from the periphery to the middle and downward is formed inside the cavity 11. At this time, the lithium battery material is transported to the guide barrel 5 through the feed pipe 9. After the lithium battery material is broken by the first blade 7 and the second blade 10, and then screened by the filter screen 110, the lithium battery material with a smaller volume falls to the center of the grinding disc 2. Afterwards, the centrifugal force generated by the rotation of the grinding disc 2 is thrown outward. When the lithium battery material is thrown onto the grinding circle 3, the grinding disc 2 drives the first grinding head 21 to rotate, and the lithium battery material is ground in the gap 2a between the first grinding head 21 and the grinding circle 3. Afterwards, the lithium battery material is ground again in the gap 2b between the second grinding head 22 and the upper side wall of the grinding circle 3; then, the ground powder and the granular mixed material are blown upward from the gap 2b between the front end of the second grinding head 22 and the inner side wall of the cavity 11, and flow upward to the classifier 8 driven by the air flow. The powder of the size is sucked away by the classifier 8 and discharged from the discharge port 13 and collected. The larger particles are blocked by the classifier 8 and fall down. After falling, the larger particles just enter the guide barrel 5. Under the guidance of the air flow in the guide barrel 5, they are polished by the first blade 7 and the second blade 10 again and return to the grinding disc 2 for cyclic grinding until the powder of the size is formed and sucked away.

[0023] Compared with the prior art, the present invention drives the grinding disc 2 to rotate by using the main shaft 6, so that the grinding disc 2 and the grinding ring 3 rotate relative to each other, thereby achieving the purpose of grinding the lithium battery material; and by arranging the first fan blade 7 and the filter screen 110 in the guide barrel 5, the filter screen 110 can effectively prevent large pieces of agglomerated materials from falling onto the grinding disc 2 and causing accumulation, so that the agglomerated materials can stay near the first fan blade 7, and then the first fan blade 7 is connected to the main shaft 6, and the main shaft 6 is used to drive the first fan blade 7 and the second fan blade 10 to rotate, so that Before the lithium battery material enters the grinding disc 2, the first fan blade 7 and the second fan blade 10 are used to break up the agglomerated lithium battery material. As a result, the volume of the lithium battery material is smaller when it falls into the grinding disc 2, thereby preventing the agglomerated material from accumulating on the grinding disc 2 and being unable to enter the gap between the grinding disc 2 and the grinding circle 3, ensuring that the lithium battery material in the cavity 11 flows smoothly to the gap between the grinding disc 2 and the grinding circle 3 during grinding, thereby improving the grinding efficiency, and fine grinding is performed on the premise of pre-grinding by the first fan blade 7 and the second fan blade 10, so that the grinding effect is better.

[0024] The structure of the classifier 8 involved in the lithium battery material grinder 100 of the present invention is well known to ordinary technicians in the field and will not be described in detail here.

[0025] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A lithium battery material grinding machine, characterized in that: The invention comprises a machine body, a grinding disc, a grinding ring, a rotary driving mechanism, a material guide cylinder, a main shaft, a first fan blade, a classifier and a feed pipe; a hollow cavity is provided in the machine body, an air inlet is provided at the lower end of the cavity, and a material discharge port is provided at the upper end; the feed pipe is arranged on the outer side of the machine body and extends into the material guide cylinder; the grinding disc is rotatably arranged in the cavity, the grinding ring is fixed to the inner wall of the cavity and is located at the outer periphery of the grinding disc, the material guide cylinder is arranged inside the cavity and is located above the grinding disc; a filter screen is provided in the material guide cylinder; the classifier is arranged at the material discharge port and is located above the material guide cylinder; the grinding disc is connected to the main shaft, the first fan blade is arranged in the material guide cylinder and is connected to the main shaft, and the first fan blade is located above the filter screen; the rotary driving mechanism is arranged on the lower side of the machine body and the output end is connected to the main shaft to drive the main shaft to rotate, so that the first fan blade rotates and breaks up the lithium battery material and the grinding disc rotates and grinds the lithium battery material.

2. The lithium battery material grinding machine according to claim 1, characterized in that: The lithium battery material grinder also includes a second fan blade, which is connected to the main shaft and is located between the first fan blade and the filter screen to further break up the lithium battery material.

3. The lithium battery material grinding machine according to claim 2, characterized in that: The first fan blade and the second fan blade drive the lithium battery material downward.

4. The lithium battery material grinding machine according to claim 1, characterized in that: The bottom surface of the cavity is in a cone structure, and air intake blades are arranged around the bottom surface of the grinding disc. The air intake blades generate an airflow along the cone surface of the cone structure and flow upward toward the gap between the grinding disc and the grinding ring as the grinding disc rotates.

5. The lithium battery material grinding machine according to claim 1, characterized in that: A first grinding head is fixedly arranged around the surface of the grinding disc, and the first grinding head is opposite to the inner side wall of the grinding ring.

6. The lithium battery material grinding machine according to claim 5, characterized in that: The upper end of the first grinding head is fixedly connected with a second grinding head. The second grinding head is located above the gap between the first grinding head and the grinding ring and is arranged with a gap between the upper side wall of the grinding ring and the inner side wall of the cavity.

7. The lithium battery material grinding machine according to claim 6, characterized in that: An extending direction of a gap between the second grinding head and the upper side wall of the grinding ring is perpendicular to an extending direction of a gap between the first grinding head and the inner side of the grinding ring.

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