Jet mill for silicon-carbon negative electrode material

Abstract

The invention relates to the technical field of silicon-carbon negative electrode material processing, in particular to a jet mill for a silicon-carbon negative electrode material, which comprises a base, and a jet mill body, a screening mechanism and a pre-processing mechanism which are arranged on the base, comprising a processing box hopper as well as a first driving assembly, a conveying assembly and a crushing assembly which are arranged on the processing box hopper, and the first driving assembly is used for driving the conveying assembly and the crushing assembly to work simultaneously; the screening mechanism comprises a screen; the first crushing roller and the second crushing roller rotate, silicon-carbon raw materials are preliminarily crushed, it is avoided that cakes in the raw materials enter the jet mill body, and consequently crushing of the raw materials is not thorough, the servo motor drives the grinding roller to roll on the surface of the screen, large-particle silicon-carbon materials on the surface of the screen are ground, and the crushing efficiency is improved. And the large-particle carbon-silicon material is ground into powder and then passes through the screen, so that the influence on the subsequent use effect of the carbon-silicon material is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of silicon-carbon negative electrode material processing, and in particular to an air flow pulverizer for silicon-carbon negative electrode materials. Background Art

[0002] Carbon silicon materials have stable chemical properties, high thermal conductivity, low thermal expansion coefficient and good wear resistance. In addition to being used as abrasives, they have many other uses. For example, using a special process to coat silicon carbide powder on the inner wall of a turbine impeller or cylinder block can improve its wear resistance and extend its service life. The high-grade refractory materials made from it are resistant to thermal shock, small in size, light in weight, high in strength, and have good energy-saving effects.

[0003] During the production process, carbon silicon materials need to be crushed into fine particles by air flow mills for subsequent processing. However, the existing air flow mills still have the following problems in the process of processing silicon carbide raw materials:

[0004] 1. The carbon silicon raw material may contain large agglomerates before entering the airflow mill. If it is directly sent into the body of the airflow mill for crushing, it will affect the crushing effect of the silicon carbide particles, resulting in incomplete crushing;

[0005] 2. After being processed by the air flow mill, the carbon silicon material still contains a small amount of large particles of raw materials. If it is not further processed, it will affect the subsequent use of the carbon silicon material. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an air flow pulverizer for silicon-carbon negative electrode materials to solve the technical problems in the prior art that "the carbon-silicon raw material is likely to contain large agglomerates before entering the air flow pulverizer. If it is directly sent into the air flow pulverizer body for pulverization, it will affect the pulverization effect of the silicon carbide particles, resulting in incomplete pulverization; the carbon-silicon material after being processed by the air flow pulverizer still contains a small amount of large particles of raw materials mixed therein, which will affect the subsequent use of the carbon-silicon material if it is not further processed."

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] An airflow pulverizer for silicon-carbon negative electrode materials comprises a base, an airflow pulverizer body arranged on the base, a screening mechanism and a pre-processing mechanism.

[0009] The pre-processing mechanism includes a processing box bucket and a No. 1 driving component, a conveying component, and a crushing component arranged on the processing box bucket, wherein the No. 1 driving component is used to drive the conveying component and the crushing component to work simultaneously;

[0010] The screening mechanism includes a screen, a shell, and a second drive assembly and a rolling assembly arranged on the shell. The drive assembly is used to drive the rolling assembly to roll the negative electrode material. The screen is fixed in the shell and in contact with the rolling roller to screen material particles that meet the standards.

[0011] The second driving component is an electric telescopic rod, and the electric telescopic rod is fixedly mounted on the side wall of the housing through a vertical plate;

[0012] A feed pipe and a discharge pipe are fixedly mounted on the side wall of the air flow pulverizer body.

[0013] As a preferred technical solution of the present invention, the No. 1 driving component includes a stepper motor, a driving wheel, a driven wheel, a No. 1 gear and a No. 2 gear. The stepper motor is fixedly mounted on the side wall of the base, and the output end of the stepper motor is fixedly mounted with a No. 1 rotating shaft. The driving wheel is fixedly sleeved on the No. 1 rotating shaft. The driving wheel and the driven wheel are connected by a transmission belt. A No. 2 rotating shaft is fixedly inserted at the center of the driven wheel, and a No. 2 gear is also fixedly sleeved on the No. 2 rotating shaft, and the No. 2 gear is meshingly connected with the No. 1 gear.

[0014] As a preferred technical solution of the present invention, the crushing assembly includes a No. 2 crushing roller and a No. 1 crushing roller, and a crushing roller shaft is inserted at the center of the No. 2 crushing roller and the No. 1 crushing roller. One end of the two crushing roller shafts is rotatably connected to the inner wall of the processing box bucket, and the other end passes through the side wall of the processing box bucket and is respectively connected to the center of the No. 1 gear and the No. 2 gear.

[0015] As a preferred technical solution of the present invention, the pre-processing mechanism also includes a feed plate, which is tilted and fixedly installed on the edge of the upper end surface of the processing box bucket, and the lower end of the feed plate is opposite to the gap between the second crushing roller and the first crushing roller.

[0016] As a preferred technical solution of the present invention, the conveying component is a spiral feed paddle, which is located at the bottom of the processing box bucket. A discharge port matching the feed pipe is provided on the rear end side wall of the processing box bucket. The feed pipe is fixedly installed at the discharge port at one end away from the air flow mill body. One end of the spiral feed paddle is opposite to the discharge port, and the other end is fixedly connected to the No. 1 rotating shaft.

[0017] As a preferred technical solution of the present invention, a limiting groove and a limiting hole matching the rolling roller are provided on the side wall of the shell, and the rolling roller rolls in the limiting groove and the limiting hole.

[0018] As a preferred technical solution of the present invention, the discharge pipe passes through the upper end surface of the screening mechanism and is connected with the screening mechanism.

[0019] As a preferred technical solution of the present invention, the rolling mechanism includes a servo motor and a rolling roller, the rolling roller is fixedly installed on the output end of the servo motor, a fixed plate is fixedly installed on the lower end face of the servo motor, the fixed plate is slidably connected to the side wall of the shell, and the fixed plate is fixedly installed on the telescopic end of the electric telescopic rod.

[0020] The present invention provides a jet mill for silicon-carbon negative electrode materials, which has the following beneficial effects:

[0021] 1. The stepper motor drives the No. 1 rotating shaft to rotate counterclockwise through the output end, and the No. 1 rotating shaft drives the driven wheel to rotate counterclockwise through the transmission belt. The driven wheel drives the No. 2 gear to rotate through the No. 2 rotating shaft, and the No. 2 gear drives the No. 1 gear to rotate. The No. 1 and No. 2 gears drive the No. 1 and No. 2 crushing rollers to rotate, and the silicon-carbon raw materials are initially crushed to prevent the agglomerates in the raw materials from entering the airflow crusher body, resulting in incomplete crushing;

[0022] 2. The servo motor drives the rolling roller to roll on the surface of the screen to roll the large-particle silicon-carbon material on the surface of the screen. The large-particle carbon-silicon material is rolled into powder and then passed through the screen, avoiding affecting the subsequent use of the carbon-silicon material. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front structural schematic diagram of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the pre-processing mechanism in the present invention;

[0025] Figure 3 It is a side sectional view of the pre-processing mechanism in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the air flow pulverizer body in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the screening mechanism in the present invention.

[0028] In the figure: 1 No. 1 rotating shaft, 2 driving wheel, 3 transmission belt, 4 driven wheel, 5 No. 2 rotating shaft, 6 No. 1 gear, 7 No. 2 gear, 8 feeding plate, 9 No. 2 crushing roller, 10 No. 1 crushing roller, 11 processing box bucket, 12 spiral feeding paddle, 13 fixing plate, 14 electric telescopic rod, 15 vertical plate, 16 limiting hole, 17 screen, 18 limiting groove, 19 rolling roller, 20 shell, 21 servo motor, 22 feeding pipe, 23 discharging pipe, 25 base, 26 screening mechanism, 27 air flow mill body, 28 pre-processing mechanism. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0031] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments:

[0032] refer to Figure 1-5 , an air flow mill for silicon-carbon negative electrode materials, comprising a base 25 and an air flow mill body 27 arranged on the base 25, a screening mechanism 26 and a pre-processing mechanism 28, the pre-processing mechanism 28 comprising a processing box 11 and a No. 1 driving component, a conveying component and a crushing component arranged on the processing box 11, the No. 1 driving component is used to drive the conveying component and the crushing component to work simultaneously; the screening mechanism 26 comprises a screen 17, a shell 20 and a No. 2 driving component and a rolling component arranged on the shell 20, the driving component is used to drive the rolling component to roll the negative electrode material, the screen 17 is fixed in the shell 20 and contacts with the rolling roller 19, and is used to screen the material particles that meet the standards; the No. 2 driving component is an electric telescopic rod 14, the electric telescopic rod 14 is fixedly mounted on the side wall of the shell 20 through a vertical plate 15, and the vertical plate 15 is fixedly mounted on the side wall of the shell 20 through bolts, so as to facilitate the disassembly and assembly of the electric telescopic rod 14 and the vertical plate 15;

[0033] A feed pipe 22 and a discharge pipe 23 are fixedly mounted on the side wall of the air flow pulverizer body 27 . The raw material enters the air flow pulverizer body 27 through the feed pipe 22 , and is processed by the air flow pulverizer body 27 and discharged from the discharge pipe 23 .

[0034] Among them, the No. 1 driving component includes a stepper motor, a driving wheel 2, a driven wheel 4, a No. 1 gear 6 and a No. 2 gear 7. The stepper motor is fixedly installed on the side wall of the base 25. The output end of the stepper motor is fixedly installed with a No. 1 rotating shaft 1. The driving wheel 2 is fixedly sleeved on the No. 1 rotating shaft 1. The driving wheel 2 and the driven wheel 4 are connected by a transmission belt 3. The center of the driven wheel 4 is fixedly interspersed with a No. 2 rotating shaft 5, and the No. 2 rotating shaft 5 is also fixedly sleeved with a No. 2 gear 7. The No. 2 gear 7 is meshed and connected with the No. 1 gear 6. The crushing component includes a No. 2 crushing roller 9 and a No. 1 crushing roller 10. The centers of the No. 2 crushing roller 9 and the No. 1 crushing roller 10 are both interspersed with powder Crushing roller shaft, one end of the two crushing roller shafts are rotatably connected to the inner wall of the processing box bucket 11, and the other ends pass through the side walls of the processing box bucket 11 and are respectively connected to the center of the No. 1 gear 6 and the No. 2 gear 7. The stepper motor drives the No. 1 rotating shaft 1 to rotate counterclockwise through the output end, and the No. 1 rotating shaft 1 drives the driven wheel 4 to rotate counterclockwise through the transmission belt 3. The driven wheel 4 drives the No. 2 gear 7 to rotate through the No. 2 rotating shaft 5, and the No. 2 gear 7 drives the No. 1 gear 6 to rotate. The No. 1 gear 6 and the No. 2 gear 7 drive the No. 1 crushing roller 10 and the No. 2 crushing roller 9 to rotate, and the silicon-carbon raw material is preliminarily crushed to prevent the lumps contained in the raw material from entering the air flow crusher body 27.

[0035] Among them, the pre-processing mechanism 28 also includes a feed plate 8, which is fixedly installed at an angle on the edge of the upper end surface of the processing box bucket 11, and the lower end of the feed plate 8 is opposite to the gap between the No. 2 crushing roller 9 and the No. 1 crushing roller 10. The silicon-carbon raw material passes through the feed plate 8 and falls between the No. 1 crushing roller 10 and the No. 2 crushing roller 9. The feed plate 8 plays a good guiding role, so that the raw material can be fully crushed.

[0036] Among them, the conveying component is a spiral feed paddle 12, which is located at the bottom of the processing box bucket 11. A discharge port matching the feed pipe 22 is opened on the rear end side wall of the processing box bucket 11. The feed pipe 22 is fixedly installed at the discharge port at one end away from the air flow mill body 27. One end of the spiral feed paddle 12 is facing the discharge port, and the other end is fixedly connected to the No. 1 rotating shaft 1. The stepper motor drives the No. 1 rotating shaft 1 to rotate through the output end, and the No. 1 rotating shaft 1 drives the spiral feed paddle 12 to rotate, and the silicon-carbon material that has been initially crushed and falls at the bottom of the processing box bucket 11 is sent into the feed pipe 22 through the spiral feed paddle 12. The air flow mill body 27 sucks the material in the feed pipe 22 and then discharges it from the discharge pipe 23 after crushing. The discharge pipe 23 passes through the upper end surface of the screening mechanism 26 and is connected with the screening mechanism 26, and the silicon-carbon raw material finally enters the screening mechanism 26.

[0037] Among them, the rolling mechanism includes a servo motor 21 and a rolling roller 19, the rolling roller 19 is fixedly installed at the output end of the servo motor 21, and a fixed plate 13 is fixedly installed on the lower end surface of the servo motor 21. The fixed plate 13 is slidably connected to the side wall of the shell 20, and the fixed plate 13 is fixedly installed at the telescopic end of the electric telescopic rod 14. The side wall of the shell 20 is provided with a limiting groove 18 and a limiting hole 16 matching the rolling roller 19, and the rolling roller 19 rolls in the limiting groove 18 and the limiting hole 16. The limiting groove 18 and the limiting hole 16 have a limiting effect on the rolling roller 19, so that the rolling roller 19 always rolls left and right on the surface of the screen 17 to roll the large-particle silicon-carbon raw materials on the surface of the screen 17, so that it meets the standards and passes through the screen 17 to fall to the bottom of the shell 20, and a material taking port is provided on the back side wall of the shell 20, and a door panel is provided in the material taking port.

[0038] The working principle of the present invention is as follows: first, the silicon-carbon raw material is placed in the processing box bucket 11 and initially crushed by the No. 2 crushing roller 9 and the No. 1 crushing roller 10, and then sent into the air flow mill body 27 through the spiral feeding paddle 12 for further crushing. After the crushing is completed, the silicon-carbon material enters the screening mechanism 26 through the discharge pipe 23, and the silicon-carbon powder that meets the standards falls to the bottom of the shell 20 through the screen 17, and the large-grained silicon-carbon material remains on the screen 17. The electric telescopic rod 14 drives the fixed plate 13 to move back and forth through the telescopic end, and then drives the servo motor 21 on the fixed plate 13 to move back and forth. The servo motor 21 drives the rolling roller 19 to roll on the surface of the screen 17 to roll the large-grained silicon-carbon material on the surface of the screen 17, and the large-grained carbon silicon material is rolled into powder and then passed through the screen 17, thereby avoiding affecting the subsequent use effect of the carbon silicon material.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A jet mill for silicon-carbon negative electrode materials, comprising a base (25), a jet mill body (27) arranged on the base (25), a screening mechanism (26) and a pre-processing mechanism (28), characterized in that: The pre-processing mechanism (28) comprises a processing box (11) and a first driving component, a conveying component and a crushing component arranged on the processing box (11), wherein the first driving component is used to drive the conveying component and the crushing component to work simultaneously; The screening mechanism (26) comprises a screen (17), a housing (20), and a second driving assembly and a rolling assembly arranged on the housing (20), wherein the driving assembly is used to drive the rolling assembly to roll the negative electrode material, and the screen (17) is fixed in the housing (20) and in contact with the rolling roller (19) to screen material particles that meet the standards; The second driving component is an electric telescopic rod (14), and the electric telescopic rod (14) is fixedly mounted on the side wall of the housing (20) through a vertical plate (15); A feed pipe (22) and a discharge pipe (23) are fixedly mounted on the side wall of the air flow pulverizer body (27).

2. The air flow mill for silicon-carbon negative electrode materials according to claim 1, characterized in that: The first driving assembly comprises a stepping motor, a driving wheel (2), a driven wheel (4), a first gear (6) and a second gear (7); the stepping motor is fixedly mounted on the side wall of a base (25); a first rotating shaft (1) is fixedly mounted on the output end of the stepping motor; the driving wheel (2) is fixedly sleeved on the first rotating shaft (1); the driving wheel (2) and the driven wheel (4) are connected by a transmission belt (3); a second rotating shaft (5) is fixedly inserted at the center of the driven wheel (4); a second gear (7) is also fixedly sleeved on the second rotating shaft (5); and the second gear (7) is meshingly connected with the first gear (6).

3. The air flow mill for silicon-carbon negative electrode materials according to claim 2, characterized in that: The pulverizing assembly comprises a No. 2 pulverizing roller (9) and a No. 1 pulverizing roller (10), wherein a pulverizing roller shaft is inserted at the center of the No. 2 pulverizing roller (9) and the No. 1 pulverizing roller (10), one end of the two pulverizing roller shafts is rotatably connected to the inner wall of the processing box bucket (11), and the other end of the two pulverizing roller shafts passes through the side wall of the processing box bucket (11) and is respectively connected to the center of the No. 1 gear (6) and the No. 2 gear (7).

4. The air flow mill for silicon-carbon negative electrode materials according to claim 3, characterized in that: The pre-processing mechanism (28) also includes a feed plate (8), which is fixedly installed at an angle on the edge of the upper end surface of the processing box bucket (11), and the lower end of the feed plate (8) is directly opposite to the gap between the second crushing roller (9) and the first crushing roller (10).

5. The air flow mill for silicon-carbon negative electrode materials according to claim 2, characterized in that: The conveying component is a spiral feed paddle (12), and the spiral feed paddle (12) is located at the bottom of the processing box bucket (11). A discharge port matching the feed pipe (22) is opened on the rear end side wall of the processing box bucket (11). The feed pipe (22) is fixedly installed at the discharge port at one end away from the air flow mill body (27). One end of the spiral feed paddle (12) faces the discharge port, and the other end is fixedly connected to the first rotating shaft (1).

6. The air flow mill for silicon-carbon negative electrode materials according to claim 1, characterized in that: The rolling mechanism comprises a servo motor (21) and a rolling roller (19), wherein the rolling roller (19) is fixedly mounted on the output end of the servo motor (21), a fixing plate (13) is fixedly mounted on the lower end surface of the servo motor (21), the fixing plate (13) is slidably connected to the side wall of the housing (20), and the fixing plate (13) is fixedly mounted on the telescopic end of the electric telescopic rod (14).

7. The air flow mill for silicon-carbon negative electrode materials according to claim 1, characterized in that: The discharge pipe (23) passes through the upper end surface of the screening mechanism (26) and is in communication with the screening mechanism (26).

8. The air flow pulverizer for silicon-carbon negative electrode materials according to claim 6, characterized in that: A limiting groove (18) and a limiting hole (16) matching the rolling roller (19) are provided on the side wall of the shell (20), and the rolling roller (19) rolls in the limiting groove (18) and the limiting hole (16).

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