Impact rotary grinding pulverizer

Abstract

The invention discloses an impact rotary grinding crusher, which belongs to the technical field of crushing devices, and is characterized by comprising a vibration platform, an upper grinding disc, a lower grinding disc, a material disc, a stand column and a shell, a vibration motor is arranged on the vibration platform and can generate a vibration effect, and the vibration direction is from spiral upward to reverse spiral downward back and forth; the upper millstone is placed on the lower millstone, a feeding hole is formed in the upper millstone, and materials are added into the millstone through the feeding hole; the lower millstone is mounted on the vibration platform, and the vibration platform drives the lower millstone to vibrate; the charging tray is used for receiving materials falling from the grinding disc; a spiral channel structure is arranged in the charging tray, and an opening at the tail end of the channel is positioned at the feeding hole of the upper grinding disc; screen holes are formed in the material disc. Compared with the prior art, the crushing device has two crushing modes of impacting and grinding, and coarse materials can be automatically screened and returned.

Description

Technical Field

[0001] The present invention relates to a crushing device, in particular to an impact rotary grinding mill. Background Art

[0002] In the mineral processing sector, disc crushers are highly efficient pulverizing equipment, breaking materials through shear and compression forces generated by the relative motion of the grinding discs. Conventional crushers are often designed using a single grinding principle, significantly reducing efficiency when processing hard minerals. Existing screening systems often utilize external vibrating screens or air classifiers. These designs not only increase equipment footprint but also cause 10-15% of qualified fine powder to re-enter the crushing chamber, resulting in additional energy consumption. Furthermore, the industry generally utilizes large, monolithic grinding discs. The gradient wear distribution of these discs results in over 30% of effective material being wasted when replacing them. Notably, the specific energy consumption of current crushers is generally above 0.85 kWh / t. The primary sources of energy loss are: ① a 35%-45% velocity gradient between the disc edge and the center; and ② inefficient grinding caused by insufficient control over the material residence time. These issues have become key constraints to improving energy efficiency in mineral pulverization processes, particularly in the processing of materials such as iron ore and quartz sand, where equipment energy consumption is particularly significant. Summary of the Invention

[0003] The technical task of the present invention is to provide an impact grinding mill to address the deficiencies of the above existing technologies.

[0004] The technical solution of the present invention to solve the technical problem is: an impact rotary mill pulverizer, characterized in that it includes a vibration platform, an upper grinding disc, a lower grinding disc, a material disc, a column and a shell; the vibration platform is provided with a vibration motor, which can generate vibration, and the direction of vibration is spiral upward to reverse spiral downward; the upper grinding disc is placed on the lower grinding disc, and the upper grinding disc is provided with a feed hole, and the material is added to the grinding disc through the feed hole; the lower grinding disc is installed on the vibration platform, and the vibration platform drives the lower grinding disc to vibrate; the material disc is used to receive the grinding disc The falling material; the lower edge of the material tray is installed on the lower grinding disc or the vibration platform so that it can vibrate synchronously with the vibration platform; a spiral channel structure is provided in the material tray, and the opening at the end of the channel is located at the feed hole of the upper grinding disc; the material tray is provided with sieve holes; the column is installed on the base of the vibration platform, and the column does not vibrate during operation and its position remains fixed; a center hole is provided at the center of each of the upper and lower grinding discs, and the column passes through the above-mentioned center hole; the shell is located on the outside of the material tray and wraps the material tray in the shell; a discharge port is provided on the shell.

[0005] A material guide cylinder is provided at the end opening of the channel, the upper end of the material guide cylinder is connected to the end of the channel, and the lower end opening of the material guide cylinder is close to the feed hole of the upper grinding disc.

[0006] A hopper is provided on the material tray, and the lower edge of the hopper is installed on the material tray.

[0007] A ratchet structure is provided between the upper grinding disc and the column.

[0008] A recessed area is provided in the middle of the upper surface of the upper grinding disc, and the feed hole is located at the edge of the recessed area.

[0009] A cover is provided in the middle of the upper surface of the upper grinding disc, and an opening is provided in the middle of the cover. The lower end of the material guide cylinder passes through the cover opening and is inserted into the cover.

[0010] The lower surface of the upper grinding disc is provided with a guide groove, which is arc-shaped. The starting end of the guide groove is located at the lower opening of the feed hole. The depth of the guide groove decreases from deep to shallow from the starting end to the other end until it is flush with the lower surface of the upper grinding disc.

[0011] A series of stripes are respectively provided on the lower surface of the upper grinding disc and the upper surface of the lower grinding disc.

[0012] The upper grinding disc is provided with a spring, which is nested on the column. The lower end of the spring directly or indirectly presses against the upper grinding disc, and the upper end of the spring presses against the column.

[0013] The upper end of the column is provided with a thread, a bolt is installed on the threaded part, and the upper end of the spring is pressed against the bolt.

[0014] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0015] 1. It has both impact and grinding functions. The two methods work together to crush materials faster and can also adapt to the crushing of materials of various hardness;

[0016] 2. It can automatically screen the crushed materials, discharge the fine materials, and grind the coarse materials again;

[0017] 3. Reduce the power consumption required for material grinding;

[0018] 4. The grinding disc required by the present invention has a smaller diameter, which reduces the cost of replacing the grinding disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an appearance diagram of the present invention.

[0020] Figure 2 It is an internal structure diagram of the present invention.

[0021] Figure 3 This is the structural diagram of the base and grinding wheel.

[0022] Figure 4It is an internal structure diagram of the present invention.

[0023] Figure 5 This is the structural diagram of the shell, material plate and lower grinding plate.

[0024] Figure 6 This is a schematic diagram of the grinding wheel.

[0025] Figure 7 This is a structural diagram of the lower surface of the upper grinding disc.

[0026] Figure 8 This is a top view of the center of the upper grinding wheel.

[0027] Figure 9 It is the top appearance diagram of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 9 As shown, the present invention includes a vibration platform 5, an upper grinding disc 11, a lower grinding disc 12, a material tray 10, a column 2 and a housing 3. For the convenience of description, hereinafter, the direction of rotation of the material in the material tray 10 is set as the forward direction, and the opposite rotation direction is set as the reverse direction.

[0030] The vibration platform 5 is provided with a vibration motor, which can generate vibration, and the vibration direction is a spiral upward to spiral downward vibration, that is, the vibration is a superposition of vertical vibration and horizontal back and forth rotation. The structure and principle of the vibration platform 5 are the same as those of the currently commonly used vibration feeding tray.

[0031] The upper grinding disc 11 rests on the lower grinding disc 12, which is provided with a feed hole 15 through which material is added. The lower grinding disc 12 is mounted on the vibrating platform 5, which drives the lower grinding disc 12 to vibrate. This vibration can be decomposed into two directions: horizontal rotation and vertical vibration. The vertical vibration impacts and crushes the material, while the horizontal rotation crushes the material. This method simultaneously achieves impact and crushing effects. The combined effect of these two methods can more efficiently pulverize the material.

[0032] The feed tray 10 is used to receive material that falls from the grinding discs. The lower edge of the feed tray 10 is mounted on the lower grinding disc 12 or the vibrating platform 5, allowing it to vibrate synchronously with the vibrating platform 5. The feed tray 10 is equipped with a spiral channel structure. The lower half of the channel is a spiral ascending structure, and the latter half spirals inward like a mosquito coil. The channel's terminal opening is located at the feed hole 15 of the upper grinding disc 11, allowing the material in the feed tray 10 to be fed into the feed hole 15 of the upper grinding disc 11 for grinding. A guide tube 19 is located at the channel's terminal opening. The upper end of the guide tube 19 is connected to the channel's terminal end, and the lower end of the guide tube 19 opens near the feed hole 15 of the upper grinding disc 11 to prevent material from spilling. The operating principle of the feed tray 10 is similar to that of commonly used vibrating feed trays. Vibration causes the material to move toward the edge of the feed tray 10 and simultaneously rotate along the edge, entering the spiral channel, rising along the spiral channel, and then being delivered to the feed hole 15 of the upper grinding disc. The material disc 10 is provided with sieve holes, which play a screening role. The material particles with small particle size are screened out, and the particles with large particle size are sent into the grinding disc again for re-grinding.

[0033] A hopper 1 is provided on the material tray 10. The hopper 1 is a cylindrical structure with a thick upper portion and a thin lower portion. The lower edge of the hopper 1 is installed on the material tray 10. When adding materials, the materials are added into the hopper 1, and the materials enter the grinding disc as the material tray 10 vibrates.

[0034] like Figure 2 As shown, the column 2 is mounted on the base of the vibration platform 5. The column 2 does not vibrate during operation and its position remains fixed. A center hole 18 is provided at the center of each of the upper grinding disc 11 and the lower grinding disc 12, and the column 2 passes through the center hole 18. Figure 6 、 8 As shown, a ratchet wheel and ratchet teeth 12 structure is provided between the upper grinding disc 11 and the column 2. As mentioned above, when the vibration platform 5 vibrates, it also rotates back and forth. When vibrating, the upper grinding disc 11 will also rotate synchronously. The ratchet wheel and ratchet teeth 12 structure cooperates with the vibration effect to enable the upper grinding disc 11 to simultaneously rotate in one direction when vibrating.

[0035] like Figure 6 As shown, a recessed area 16 is provided in the middle of the upper surface of the upper grinding disc 11, and the material falling from the material disc 10 falls into the recessed area 16. The feed hole 15 is located at the edge of the recessed area 16, and the material in the recessed area 16 rotates along the edge and then falls into the feed hole 15. Figure 3 、 4 As shown, a cover 13 is provided in the middle of the upper surface of the upper grinding disc 11, and an opening is provided in the middle of the cover 13. The lower end of the material guide cylinder 19 passes through the opening of the cover 13 and is inserted into the cover 13. The material is surrounded by the cover 13 to prevent it from scattering.

[0036] like Figure 7 As shown, the lower surface of the upper grinding disc 11 is provided with a guide groove 17. This guide groove 17 is arc-shaped and begins at the lower opening of the feed hole 15. The depth of the guide groove 17 gradually decreases from the starting point to the other end, until it is flush with the lower surface of the upper grinding disc 11. The guide groove 17 can temporarily store fallen materials and also disperse the materials so that they can be evenly distributed across the grinding surface of the grinding disc. A series of stripes are also provided on the lower surface of the upper grinding disc 11 and the upper surface of the lower grinding disc 12 to enhance the grinding capacity of the grinding discs.

[0037] The upper grinding disc 11 is provided with a spring 8, which provides a downward elastic force to the upper grinding disc 11. This elastic force increases the grinding force of the grinding disc on the material, thereby improving the grinding effect. The spring 8 is nested in the column 2, and the lower end of the spring 8 directly or indirectly presses against the upper grinding disc 11. The so-called indirect means that it presses against the upper grinding disc 11 through other parts. For example, in this embodiment, it presses against the upper grinding disc 11 through the sleeve structure 9. The upper end of the spring 8 presses against the column 2. The upper end of the column 2 is provided with a thread 6, and a bolt 7 is installed in the thread 6 part. The upper end of the spring 8 presses against the bolt 7. By adjusting the height of the bolt 7, the pressure of the spring 8 can be adjusted to facilitate the use of materials of different hardness. For example, when crushing materials with higher hardness, the bolt 7 can be lowered to increase the elastic force of the spring 8; for materials with lower hardness, the bolt 7 can be raised to reduce the elastic force of the spring 8.

[0038] The housing 3 is located outside the material tray 10 and encloses the material tray 10. Fine particles screened from the material tray 10 fall onto the housing 3. A discharge port 4 is provided on the side of the lower surface of the housing 3. The material inside the housing 3 rotates along the edge of the housing 3 due to vibration. When it rotates to the discharge port 4, the material is discharged from the discharge port 4.

[0039] The working principle of the present invention is as follows: when in use, the material is added into the feed hopper 1, and the material enters the grinding disc through the feed port through the vibration action of the feed disc 10 for crushing. After crushing, the material falls into the feed disc 10, and the screening action of the feed disc 10 screens out the fine material that meets the requirements, and the coarse material is sent to the grinding disc for crushing again. This process is called recycling.

[0040] For the traditional grinding disc, the grinding disc needs to be large enough to fully grind the material. For the present application, due to the material returning function, it is not necessary to fully grind the material at one time, and half of the material after the first crushing can be qualified, and the other material can be returned for grinding again. After testing, it is found that the diameter of the grinding disc is about 60% of the diameter of the traditional grinding disc, which can meet the 50% or so crushing qualification rate at one time. For different materials, the above values are different, but in general, the diameter of 60% of the traditional grinding disc can basically meet the crushing demand of the conventional material. In this way, the area of the grinding disc is about 1 / 3 of the traditional grinding disc, and theoretically the required power consumption is only 1 / 3 of the grinding disc without the material returning device. In the present application, in order to improve the speed, the power of the vibration motor is selected as 60% of the power of the original vibration motor, so the speed of the grinding disc is increased. Since half of the material needs to be ground again, the speed is increased while the work load is increased by about 50%. In summary, the small grinding disc + material returning device + 60% power motor is more efficient than the large grinding disc without the material returning device. One of the advantages of the small grinding disc + material returning device + 60% power motor is that it reduces power consumption, and of course it can also increase the grinding speed by increasing the power consumption on this basis. The particle size of the screened material is 100%, and it does not need to be screened again, which saves a step. The reason why the present application saves power consumption is that for the large grinding disc, the material stays in the grinding disc for too long, and many materials have been ground fine enough, but cannot be discharged in time and need to stay in the grinding disc for a long time to participate in the grinding process, thus occupying part of the power consumption and also increasing the wear of the grinding disc.

[0041] The grinding surface of the grinding disc will be worn out after a long time of use and needs to be replaced. The small grinding disc has lower replacement cost than the large grinding disc.

[0042] It should be noted that the specific embodiments of the present application have been described in detail, and various obvious modifications made by those skilled in the art without departing from the spirit and scope of the present application are within the scope of protection of the present application.

Claims

1. An impact grinding mill, characterized in that: It includes a vibration platform, an upper grinding disc, a lower grinding disc, a material disc, a column and a shell; the vibration platform is provided with a vibration motor, which can generate vibration, and the direction of vibration is spiral upward to reverse spiral downward; the upper grinding disc is placed on the lower grinding disc, and the upper grinding disc is provided with a feed hole, and material is added to the grinding disc through the feed hole; the lower grinding disc is installed on the vibration platform, and the vibration platform drives the lower grinding disc to vibrate; the material disc is used to receive the material falling from the grinding disc; the lower edge of the material disc is installed on the lower grinding disc or the vibration platform so that it can vibrate synchronously with the vibration platform; a spiral channel structure is provided in the material disc, and the opening at the end of the channel is located at the feed hole of the upper grinding disc; the material disc is provided with a sieve hole; the column is installed on the base of the vibration platform, and the column does not vibrate during operation, and its position remains fixed; a center hole is respectively provided at the center of the upper and lower grinding discs, and the column passes through the above-mentioned center hole; the shell is located on the outside of the material disc and wraps the material disc in the shell; the shell is provided with a discharge port.

2. The impact grinding mill according to claim 1, characterized in that: A material guide cylinder is provided at the end opening of the channel, the upper end of the material guide cylinder is connected to the end of the channel, and the lower end opening of the material guide cylinder is close to the feed hole of the upper grinding disc.

3. The impact grinding mill according to claim 1, characterized in that: A hopper is provided on the material tray, and the lower edge of the hopper is installed on the material tray.

4. The impact grinding mill according to claim 1, characterized in that: A ratchet structure is provided between the upper grinding disc and the column.

5. The impact grinding mill according to claim 1, characterized in that: A recessed area is provided in the middle of the upper surface of the upper grinding disc, and the feed hole is located at the edge of the recessed area.

6. The impact rotary mill according to claim 2, characterized in that: A cover is provided at the middle position of the upper surface of the upper grinding disc, an opening is provided in the middle of the cover, and the lower end of the material guide cylinder passes through the cover opening and is inserted into the cover.

7. The impact grinding mill according to claim 1, characterized in that: A guide groove is provided on the lower surface of the upper grinding disc. The guide groove is arc-shaped. The starting end of the guide groove is located at the lower opening of the feed hole. The depth of the guide groove decreases from deep to shallow from the starting end to the other end until it is flush with the lower surface of the upper grinding disc.

8. The impact grinding mill according to claim 1, characterized in that: A series of stripes are respectively provided on the lower surface of the upper grinding disc and the upper surface of the lower grinding disc.

9. The impact grinding mill according to claim 1, characterized in that: The upper grinding disc is provided with a spring which is nested on the column. The lower end of the spring directly or indirectly presses against the upper grinding disc, and the upper end of the spring presses against the column.

10. The impact rotary mill according to claim 9, characterized in that: The upper end of the column is provided with a thread, a bolt is installed on the threaded part, and the upper end of the spring is pressed against the bolt.

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