Ball mill for silicon nitride ceramic production

Abstract

The utility model discloses a ball mill for producing silicon nitride ceramics, and belongs to the field of ball mills. A ball mill for silicon nitride ceramic production comprises a barrel and a motor, and further comprises a feeding and discharging port and an air outlet which are formed in the two ends of the barrel, the feeding and discharging port is sleeved with a mounting base, and a feeding and discharging adjusting mechanism is arranged on the mounting base and used for adjusting the opening degree of the feeding and discharging port; the rotating shaft is fixedly connected to the output end of the motor, a driving wheel is fixedly connected to the rotating shaft, a mounting plate is fixedly connected to the exhaust outlet, an exhaust fan is rotationally connected to the mounting plate, a driven wheel is fixedly connected to an exhaust fan shaft, and a belt is connected between the driven wheel and the driving wheel in a sleeving mode; the utility model can overcome the problems that the ball mill is inconvenient to feed and discharge, the cooling cost of the ball mill cylinder is high, and equipment is easy to rust and age.

Description

Technical Field

[0001] The utility model relates to the technical field of ball mills, in particular to a ball mill for producing silicon nitride ceramics. Background Art

[0002] Silicon nitride ceramics are inorganic ceramics that do not shrink during sintering. Silicon nitride has high strength, especially hot-pressed silicon nitride, which is one of the hardest substances in the world, with properties such as high strength, low density, and high temperature resistance. When processing and producing silicon nitride ceramics, the raw materials need to be crushed and shaped, and the ball mill is the key equipment for crushing the materials after they are crushed. This type of mill is one of the key processing equipment in the production process of silicon nitride ceramics, in which a certain number of steel balls are loaded into its cylinder as grinding media.

[0003] At present, most ball mills used for crushing silicon nitride ceramics are charged and discharged through two ends respectively, or charged and discharged through one port at the same time, but other equipment is needed for charging, which makes charging and discharging inconvenient. In addition, the equipment will generate a lot of heat during operation. The existing cooling method for the ball mill cylinder is mainly cooling water or external fan, which not only wastes water resources and energy, but also easily causes the ball mill to rust and age. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art of inconvenient feeding and discharging operation of ball mills, high cost of cooling the cylinder of ball mills, and easy rust and aging of equipment, and proposes a ball mill for silicon nitride ceramic production.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ball mill for producing silicon nitride ceramics comprises a cylinder and a motor, and also comprises: an inlet and outlet and an exhaust port opened at both ends of the cylinder, a mounting seat being sleeved on the inlet and outlet, an inlet and outlet adjustment mechanism being arranged on the mounting seat for adjusting the opening of the inlet and outlet; a rotating shaft fixedly connected to the output end of the motor, a driving wheel being fixedly connected to the rotating shaft, a mounting plate being fixedly connected to the exhaust port, an exhaust fan being rotatably connected to the mounting plate, a driven wheel being fixedly connected to the shaft of the exhaust fan, and a belt being sleeved between the driven wheel and the driving wheel.

[0007] In order to facilitate the feeding and discharging of silicon nitride ceramics, preferably, the feed and discharge adjustment mechanism includes a fixed seat fixedly connected to the mounting seat, a rotating rod is rotatably connected to the fixed seat, a feed bin is fixedly connected to the end of the rotating rod, a baffle is fixedly connected to the mounting seat, and a limiting plate is fixedly connected to the fixed seat.

[0008] In order to ensure the stability of feeding and discharging of silicon nitride ceramics, the feed bin is further divided into a conical part and a circular part, wherein the size of the circular part of the feed bin is smaller than the size of the inlet and outlet, the end of the baffle is in contact with the bottom of the rotating rod, and the limit plate is vertically arranged with the mounting seat.

[0009] In order to facilitate cooling during the material crushing process, preferably, the exhaust fan is located inside the exhaust port, the driven wheel is located outside the exhaust port, the exhaust fan is in contact with the inner wall of the exhaust port, and the blades on the surface of the exhaust fan are inclined.

[0010] In order to ensure the stable operation of the equipment, preferably, it also includes a driving gear fixedly connected to the rotating shaft, and a gear ring is fixedly connected to the cylinder, and the gear ring is meshed with the driving gear.

[0011] In order to facilitate the rotation of the drive cylinder, preferably, a bracket is fixedly connected to the bottom of the mounting seat, and the motor is fixedly connected to the bracket.

[0012] In order to ensure the stability of the cylinder during rotation and reduce the stress on the end of the cylinder, two sets of guide wheels are symmetrically rotatably connected to the bracket, and a guide rail is fixedly connected to one side of the cylinder close to the guide wheel, and the guide wheel and the guide rail are tightly fitted.

[0013] In order to improve the efficiency of feeding and discharging, it further includes multiple groups of feeding and discharging screws fixedly connected to the inner wall of the cylinder near the feeding and discharging port, and the circular part of the feeding bin is located between the multiple groups of feeding and discharging screws.

[0014] In order to facilitate the inspection of the inside of the cylinder and the stability of the discharge, preferably, the side of the cylinder close to the inlet and outlet is tapered, and the two ends of the cylinder are connected by flanges.

[0015] In order to prevent dust from overflowing during the crushing process, preferably, a dustproof net is fixedly connected to one side of the inner wall of the cylinder close to the exhaust port, and there is a distance between the dustproof net and the exhaust fan.

[0016] Compared with the prior art, the utility model provides a ball mill for producing silicon nitride ceramics, which has the following beneficial effects:

[0017] 1. The ball mill for silicon nitride ceramic production can adjust the positional relationship between the feed bin and the inlet and outlet by adjusting the angle of the rotating rod, so that the material can be fed and discharged through the inlet and outlet at the same time, and no supporting equipment is required during feeding. The baffle and limit plate can ensure the stability of the feed bin during feeding and avoid the feed bin from affecting the discharge.

[0018] 2. The ball mill for silicon nitride ceramic production drives the driving wheel to rotate through the rotating shaft, and drives the exhaust fan to rotate through the driven wheel and belt. On the one hand, it can cool the cylinder during crushing, and on the other hand, it can speed up the efficiency of the inlet and outlet during discharging. At the same time, it can also reduce the consumption of water resources and energy, and is more energy-saving and environmentally friendly.

[0019] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model can overcome the problems of inconvenient operation of feeding and discharging materials in the ball mill, high cost of cooling the ball mill cylinder, and easy rust and aging of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a ball mill for producing silicon nitride ceramics proposed in the utility model. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of a ball mill for producing silicon nitride ceramics proposed in the utility model. Figure 2 .

[0022] Figure 3 A schematic diagram of the partial structure of a ball mill for producing silicon nitride ceramics proposed in the utility model Figure 1 .

[0023] Figure 4 The utility model discloses a schematic structural diagram of a driving gear and a gear ring in a ball mill for producing silicon nitride ceramics.

[0024] Figure 5 A schematic diagram of the partial structure of a ball mill for producing silicon nitride ceramics proposed in the utility model Figure 2 .

[0025] In the figure: 1. Cylinder; 2. Inlet and outlet; 3. Inlet and outlet spiral; 4. Mounting seat; 5. Bracket; 6. Inlet and outlet adjustment mechanism; 61. Fixed seat; 62. Rotating rod; 63. Feed bin; 64. Baffle; 65. Limiting plate; 7. Guide rail; 8. Guide wheel; 9. Motor; 10. Rotating shaft; 11. Driving gear; 12. Gear ring; 13. Exhaust port; 14. Mounting plate; 15. Exhaust fan; 16. Driven wheel; 17. Driving wheel; 18. Belt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] Example:

[0029] Reference Figure 1-Figure 5 A ball mill for producing silicon nitride ceramics includes a barrel 1 and a motor 9. The barrel 1 is tapered on one side near the inlet and outlet 2. Both ends of the barrel 1 are connected by flanges. The specific structure inside the barrel 1 can refer to the technical solutions in the prior art. Those skilled in the art can know it and will not be described in detail here. It also includes: inlet and outlet 2 and exhaust vent 13 are provided at both ends of the barrel 1. A mounting seat 4 is sleeved on the inlet and outlet 2. A bracket 5 is fixedly connected to the bottom of the mounting seat 4. The motor 9 is fixedly connected to the bracket 5. An inlet and outlet adjustment mechanism 6 is provided on the mounting seat 4 for adjusting the opening of the inlet and outlet 2; fixed A rotating shaft 10 is connected to the output end of the motor 9, and a driving wheel 17 is fixedly connected to the rotating shaft 10. A mounting plate 14 is fixedly connected to the exhaust port 13, and an exhaust fan 15 is rotatably connected to the mounting plate 14. A dust screen is fixedly connected to the inner wall of the cylinder 1 on one side close to the exhaust port 13. The dust screen is a conventional means in the prior art, so it is not shown in the accompanying drawings. It is mainly to prevent the exhaust fan 15 from discharging the crushed materials inside when exhausting air. There is a distance between the dust screen and the exhaust fan 15, and a driven wheel 16 is fixedly connected to the shaft of the exhaust fan 15, and a belt 18 is sleeved between the driven wheel 16 and the driving wheel 17.

[0030] Reference Figure 1 and Figure 3 The feed and discharge adjustment mechanism 6 includes a fixed seat 61 fixedly connected to the mounting seat 4, a rotating rod 62 is rotatably connected to the fixed seat 61, a feed bin 63 is fixedly connected to the end of the rotating rod 62, a baffle 64 is fixedly connected to the mounting seat 4, and a limiting plate 65 is fixedly connected to the fixed seat 61. When feeding is needed, the feed bin 63 is rotated downward so that the rotating rod 62 and the baffle 64 are tightly fitted. At this time, part of the feed bin 63 will be inserted into the feed and discharge port 2; when discharging is needed, the feed bin 63 is rotated upward so that the rotating rod 62 and the limiting plate 65 are tightly fitted. At this time, the feed bin 63 will not affect the discharging efficiency.

[0031] Reference Figure 3The feed bin 63 comprises a conical part and a circular part, wherein the size of the circular part of the feed bin 63 is smaller than the size of the inlet and outlet 2, the end of the baffle 64 is in contact with the bottom of the rotating rod 62, and the limit plate 65 is vertically arranged with the mounting seat 4. This design is to avoid friction between the cylinder 1 and the feed bin 63 during rotation, so as to facilitate feeding and discharging.

[0032] Reference Figure 2 and Figure 5 The exhaust fan 15 is located inside the exhaust port 13, the driven wheel 16 is located outside the exhaust port 13, the exhaust fan 15 is in contact with the inner wall of the exhaust port 13, and the blades on the surface of the exhaust fan 15 are inclined. The forward and reverse rotation of the exhaust fan 15 can make the wind blow in different directions.

[0033] Reference Figure 1 , Figure 2 and Figure 4 , and also includes a driving gear 11 fixedly connected to the rotating shaft 10, and a ring gear 12 is fixedly connected to the cylinder 1, and the ring gear 12 is meshed with the driving gear 11. Through the meshing between the driving gear 11 and the ring gear 12, the rotation of the cylinder 1 can be driven more stably.

[0034] Reference Figure 1 Two sets of guide wheels 8 are symmetrically rotatably connected on the bracket 5, and a guide rail 7 is fixedly connected to the side of the cylinder 1 close to the guide wheel 8. The guide wheel 8 and the guide rail 7 fit tightly together, which can reduce the stress on both ends of the cylinder 1 when it rotates and avoid deformation of the ends of the cylinder 1 under long-term high stress.

[0035] Reference Figure 1 , and also includes a plurality of groups of feed and discharge screws 3 fixedly connected to the inner wall of the cylinder 1 near the feed and discharge port 2. The circular part of the feed bin 63 is located between the plurality of groups of feed and discharge screws 3. The specific structure of the feed and discharge screws 3 can refer to the technical solutions in the prior art. Those skilled in the art can know it and will not be elaborated here. By the forward and reverse rotation of the cylinder 1, the entry of materials and the discharge of materials after crushing can be accelerated.

[0036] In the utility model, when working and feeding, the feed bin 63 is rotated downward so that the circular part of the feed bin 63 is inserted into the inlet and outlet 2, and the feeding can be realized through the conical part of the feed bin 63, wherein the baffle 64 can ensure the stability of the feed bin 63 during feeding, and at the same time, the motor 9 is started to drive the rotating shaft 10 and the driving gear 11 to rotate, and under the action of the ring gear 12, the entire cylinder 1 is driven to rotate, at this time, the feeding and discharging spiral 3 will accelerate the entry of the material, and at the same time, the steel ball in the cylinder 1 will crush the material during rotation; in addition, the rotating shaft 10 will drive the exhaust fan 15 to rotate through the driving wheel 17, the driven wheel 16 and the belt 18, and at this time, the external gas will enter the cylinder through the inlet and outlet 2 The dust is discharged from the cylinder 1 through the exhaust port 13, thereby cooling the cylinder 1. In the process, the dust screen can prevent the crushed material from being discharged with the exhaust fan 15. The above process can realize the continuous addition of materials, greatly reduce the energy consumption, be more energy-saving and environmentally friendly, and avoid the damage of water cooling to the cylinder 1. When the crushing is completed, the feed bin 63 is rotated upward, and the feed bin 63 is limited by the limit plate 65. Then the motor 9 is started to rotate in the opposite direction. The material can be discharged under the action of the feed and discharge screw 3. At the same time, the exhaust fan 15 can blow the material in the cylinder 1 to the feed and discharge port 2, so as to further speed up the discharge efficiency of the material.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ball mill for producing silicon nitride ceramics, comprising a cylinder (1) and a motor (9), characterized in that: Also includes: An inlet and outlet (2) and an exhaust port (13) are provided at both ends of the cylinder (1); a mounting seat (4) is sleeved on the inlet and outlet (2); and an inlet and outlet adjustment mechanism (6) is provided on the mounting seat (4) for adjusting the opening of the inlet and outlet (2); A rotating shaft (10) is fixedly connected to the output end of the motor (9), a driving wheel (17) is fixedly connected to the rotating shaft (10), a mounting plate (14) is fixedly connected to the exhaust port (13), an exhaust fan (15) is rotatably connected to the mounting plate (14), a driven wheel (16) is fixedly connected to the shaft of the exhaust fan (15), and a belt (18) is sleeved between the driven wheel (16) and the driving wheel (17).

2. A ball mill for producing silicon nitride ceramics according to claim 1, characterized in that: The feed and discharge adjustment mechanism (6) comprises a fixed seat (61) fixedly connected to the mounting seat (4), a rotating rod (62) rotatably connected to the fixed seat (61), a feed bin (63) fixedly connected to the end of the rotating rod (62), a baffle (64) fixedly connected to the mounting seat (4), and a limit plate (65) fixedly connected to the fixed seat (61).

3. A ball mill for producing silicon nitride ceramics according to claim 2, characterized in that: The feed bin (63) comprises a conical part and a circular part, wherein the size of the circular part of the feed bin (63) is smaller than the size of the feed port (2), the end of the baffle (64) is in contact with the bottom of the rotating rod (62), and the limit plate (65) is arranged vertically with the mounting seat (4).

4. A ball mill for producing silicon nitride ceramics according to claim 1, characterized in that: The exhaust fan (15) is located inside the exhaust port (13), the driven wheel (16) is located outside the exhaust port (13), the exhaust fan (15) is in contact with the inner wall of the exhaust port (13), and the blades on the surface of the exhaust fan (15) are inclined.

5. A ball mill for producing silicon nitride ceramics according to claim 1, characterized in that: It also comprises a driving gear (11) fixedly connected to the rotating shaft (10), and a gear ring (12) fixedly connected to the cylinder (1), and the gear ring (12) is meshed with the driving gear (11).

6. A ball mill for producing silicon nitride ceramics according to claim 1, characterized in that: A bracket (5) is fixedly connected to the bottom of the mounting seat (4), and the motor (9) is fixedly connected to the bracket (5).

7. A ball mill for producing silicon nitride ceramics according to claim 6, characterized in that: The bracket (5) is symmetrically rotatably connected with two sets of guide wheels (8), and a guide rail (7) is fixedly connected to one side of the cylinder (1) close to the guide wheel (8), and the guide wheel (8) and the guide rail (7) are tightly fitted.

8. A ball mill for producing silicon nitride ceramics according to claim 2, characterized in that: It also includes a plurality of groups of feed and discharge screws (3) fixedly connected to the inner wall of the cylinder (1) near the feed and discharge port (2), and the circular portion of the feed bin (63) is located between the plurality of groups of feed and discharge screws (3).

9. A ball mill for producing silicon nitride ceramics according to claim 1, characterized in that: The side of the cylinder (1) close to the inlet and outlet (2) is tapered, and both ends of the cylinder (1) are connected by flanges.

10. A ball mill for producing silicon nitride ceramics according to claim 1, characterized in that: A dustproof net is fixedly connected to one side of the inner wall of the cylinder (1) close to the exhaust port (13), and there is a distance between the dustproof net and the exhaust fan (15).

Images