An impact rotary mill

Abstract

The application discloses an impact rotary grinding pulverizer and belongs to the technical field of crushing devices, characterized by comprising a vibrating platform, an upper grinding disc, a lower grinding disc, a material tray, a stand and a shell. The vibrating platform is provided with a vibrating motor, can generate a vibrating action, and the vibrating direction is a spiral upward-to-reverse spiral downward direction back-and-forth vibration. The upper grinding disc is placed on the lower grinding disc, is provided with a feeding hole on the upper grinding disc, and feeding materials into the grinding disc through the feeding hole. The lower grinding disc is installed on the vibrating platform and is driven to vibrate by the vibrating platform. The material tray is used for receiving the materials falling from the grinding disc. The material tray is provided with a spiral channel structure, and the opening at the end of the channel is located at the feeding hole of the upper grinding disc. The material tray is provided with a sieve hole. Compared with the prior art, the application has both impact and grinding crushing modes and can automatically screen the coarse materials back to the materials.

Description

Technical Field

[0001] This invention relates to a crushing device, and more particularly to an impact gyratory mill. Background Technology

[0002] In the mineral processing field, disc crushers, as a high-efficiency crushing equipment, achieve material crushing through the shearing and extrusion forces generated by the relative motion between the grinding discs. Traditional crushers mostly adopt a single grinding principle design, resulting in a significant reduction in efficiency when processing high-hardness minerals. Existing screening systems often use external vibrating screens or air classifiers. Such designs not only increase the equipment's footprint but also cause 10-15% of qualified fine powder to repeatedly enter the crushing chamber, resulting in additional energy consumption. Simultaneously, the industry commonly uses large, integral grinding discs. The wear gradient distribution characteristics of large grinding discs lead to the waste of over 30% of usable material when the entire disc is replaced. It is worth noting that the unit energy consumption of current crushers is generally higher than 0.85 kWh / t, with the main energy losses stemming from: ① a 35%-45% velocity gradient between the edge and center of the grinding disc; ② ineffective grinding caused by insufficient precision in controlling material residence time. These problems have become key factors restricting the improvement of energy efficiency in mineral crushing processes, especially in the processing of materials such as iron ore and quartz sand, where equipment energy consumption is even more significant. Summary of the Invention

[0003] The technical objective of this invention is to address the shortcomings of the prior art by providing an impact gyratory mill pulverizer.

[0004] The technical solution of this invention to solve its technical problem is: an impact gyratory mill, characterized in that: it includes a vibrating platform, an upper grinding disc, a lower grinding disc, a material tray, a column, and a shell; the vibrating platform is equipped with a vibrating motor, which can generate vibration, and the vibration direction is a back-and-forth vibration from 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 feeding hole, through which material is added to the grinding disc; the lower grinding disc is installed on the vibrating platform, and the vibration platform drives the lower grinding disc to vibrate; the material tray is used to receive the grinding disc. The falling material; the lower edge of the material tray is mounted on the lower grinding disc or vibrating platform so that it can vibrate synchronously with the vibrating platform; the material tray has a spiral channel structure, and the opening at the end of the channel is located at the feed hole of the upper grinding disc; the material tray has sieve holes; the column is mounted on the base of the vibrating platform, and the column does not vibrate during operation, and its position remains unchanged; the upper grinding disc and the lower grinding disc each have a center hole at their center, and the column passes through the center hole; the shell is located outside the material tray and encloses the material tray inside the shell; the shell has a discharge port.

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

[0006] The aforementioned material tray is equipped with a hopper, and the lower edge of the hopper is mounted on the material tray.

[0007] The aforementioned upper grinding disc and column are provided with a ratchet and tooth structure.

[0008] The upper surface of the aforementioned upper grinding disc has a recessed area in the middle, 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 above-mentioned upper grinding disc, and an opening is provided in the middle of the cover. The lower end of the guide cylinder passes through the opening of the cover and is inserted into the cover.

[0010] The lower surface of the upper grinding disc is provided with a guide groove. 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 gradually decreases 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 provided on the lower surface of the upper grinding disc and the upper surface of the lower grinding disc.

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

[0013] The upper end of the aforementioned column is threaded, and a bolt is installed on the threaded part. The upper end of the spring rests on the bolt.

[0014] Compared with the prior art, the present invention has the following outstanding advantages: 1. It combines the functions of impact and grinding, and the two methods work together to crush materials faster and can also adapt to the crushing of materials of various hardness; 2. It can automatically screen the crushed materials, discharge fine materials, and re-grind coarse materials; 3. It reduces the power consumption required for material grinding; 4. The grinding disc diameter required by the present invention is small, which reduces the cost of grinding disc replacement. Attached Figure Description

[0015] Figure 1 This is an external view of the present invention.

[0016] Figure 2 This is a diagram of the internal structure of the present invention.

[0017] Figure 3 This is a structural diagram of the base and grinding disc.

[0018] Figure 4 This is a diagram of the internal structure of the present invention.

[0019] Figure 5 It is a structural diagram of the shell, the feed tray, and the lower grinding disc.

[0020] Figure 6 This is a schematic diagram of a millstone.

[0021] Figure 7 This is a structural diagram of the lower surface of the upper grinding disc.

[0022] Figure 8 This is a top view of the center of the upper millstone.

[0023] Figure 9 This is a top view of the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] 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 ease of description, in the following text, the direction of material rotation within the material tray 10 is defined as the positive direction, and the opposite direction of rotation is defined as the negative direction.

[0026] The vibration platform 5 is equipped with a vibration motor, which generates vibration in a spiral-upward to spiral-downward direction. This vibration is a combination of vertical vibration and horizontal rotation. The structure and principle of the vibration platform 5 are similar to commonly used vibrating feeders.

[0027] The upper grinding disc 11 is placed on the lower grinding disc 12. The upper grinding disc 11 is provided with a feed hole 15, through which material is added to the grinding disc. The lower grinding disc 12 is mounted on the vibrating platform 5, and the vibrating platform 5 drives the lower grinding disc 12 to vibrate. Since this vibration can be decomposed into two directions, namely horizontal back-and-forth rotation and vertical vibration, the vertical vibration impacts and crushes the material, while the horizontal rotation crushes the material. Therefore, this method simultaneously achieves the effects of impact crushing and crushing. Through the combined action of the two methods, the material can be pulverized more efficiently.

[0028] The feed tray 10 is used to receive materials falling from the grinding disc. 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 has a spiral channel structure; the lower half of the channel is a spiral ascending structure, and the rear half is a mosquito coil-shaped spiral pointing inwards. The opening at the end of the channel is located at the feed hole 15 of the upper grinding disc 11, thus 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 cylinder 19 is provided at the opening at the end of the channel. The upper end of the guide cylinder 19 is connected to the end of the channel, and the lower end of the guide cylinder 19 is close to the feed hole 15 of the upper grinding disc 11 to prevent material spillage. The working principle of the feed tray 10 is the same as that of commonly used vibrating feed trays. Through vibration, the material moves towards the edge within the feed tray 10 and rotates along the edge, entering the spiral channel, rising along the spiral channel, and then being fed to the feed hole 15 of the upper grinding disc. The material tray 10 is provided with sieve holes, which serve as a screening mechanism. Small particles are screened out, while large particles are fed back into the grinding tray for further grinding.

[0029] The material tray 10 is equipped with a hopper 1, which is a cylindrical structure that is thicker at the top and thinner at the bottom. The lower edge of the hopper 1 is installed on the material tray 10. When feeding, the material is added into the hopper 1, and the material enters the grinding disc with the vibration of the material tray 10.

[0030] like Figure 2 As shown, the column 2 is mounted on the base of the vibration platform 5. During operation, the column 2 does not vibrate and its position remains fixed. The upper grinding disc 11 and the lower grinding disc 12 each have a central hole 18 at their center, and the column 2 passes through these central holes 18. Figure 6 , 8 As shown, a ratchet structure is provided between the upper grinding disc 11 and the column 2. As mentioned above, the vibration platform 5 vibrates while simultaneously rotating back and forth, and the upper grinding disc 11 also rotates synchronously during vibration. The ratchet structure, in conjunction with the vibration action, enables the upper grinding disc 11 to rotate unidirectionally simultaneously during vibration.

[0031] 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 tray 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. The cover 13 has an opening in the middle. The lower end of the guide cylinder 19 passes through the opening of the cover 13 and is inserted into the cover 13. The cover 13 surrounds the material and prevents it from scattering.

[0032] like Figure 7As shown, the lower surface of the upper grinding disc 11 is provided with a guide groove 17. The guide groove 17 is arc-shaped, with its starting end located at the lower opening of the feed hole 15. The depth of the guide groove 17 gradually decreases from the starting end 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 the falling material and also disperse the material, allowing it to be evenly spread across the entire grinding surface of the grinding disc. The lower surface of the upper grinding disc 11 and the upper surface of the lower grinding disc 12 are respectively provided with a series of stripes to increase the grinding capacity of the grinding discs.

[0033] A spring 8 is provided on the upper grinding disc 11, providing 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 on the column 2, and the lower end of the spring 8 directly or indirectly abuts against the upper grinding disc 11. Indirectly, it abuts against the upper grinding disc 11 through other parts, such as the sleeve structure 9 in this embodiment. The upper end of the spring 8 abuts against the column 2. The upper end of the column 2 is provided with a thread 6, and a bolt 7 is installed on the thread 6. The upper end of the spring 8 abuts against the bolt 7. The pressure of the spring 8 can be adjusted by adjusting the height of the bolt 7 to accommodate 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 decrease the elastic force of the spring 8.

[0034] The housing 3 is located outside the material tray 10 and encloses the material tray 10 inside the housing 3. The fine particles screened on 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.

[0035] The working principle of this invention is as follows: When in use, the material is added into the feed hopper 1. The material enters the grinding disc through the feed port for crushing by the vibration of the feed pan 10. After crushing, the material falls into the feed pan 10. The fine material that meets the requirements is screened out by the screening action of the feed pan 10, and the coarse material is sent into the grinding disc for crushing again. This process is called material return.

[0036] Traditional grinding discs require a large enough disc to fully grind materials. However, this invention, with its material return function, eliminates the need for complete grinding in one pass. Half the material only needs to be properly ground after the first pass, allowing the rest to be returned for further grinding. Experiments showed that a disc diameter approximately 60% of a traditional disc is sufficient for a 50% pass rate in a single pass. While these figures may vary for different materials, a 60% diameter disc is generally adequate for crushing common materials. This results in a disc area approximately one-third that of a traditional disc, theoretically requiring only one-third the power of a disc without a return device. In this invention, to increase speed, the vibration motor is selected with 60% of its original power, thus increasing the disc's operating speed. Since half the material requires secondary grinding, this increases workload by approximately 50%. Overall, the combination of a small disc, a return device, and a 60% power motor provides comparable efficiency compared to a large disc without a return device. One advantage of the small grinding disc + material return device + 60% power motor method is reduced power consumption. Of course, the grinding rate can also be increased by increasing power consumption. The qualified particle size of the screened material is 100%, eliminating the need for further sieving and saving a step. The reason for the power saving of this invention is that with a large grinding disc, the material is ground for too long. Many materials that are already finely ground cannot be discharged in time and need to remain in the grinding disc for a long time to participate in the grinding process, thus consuming some power and also aggravating the wear of the grinding disc.

[0037] After prolonged use, the grinding surface of a grinding disc will wear down and need to be replaced. Compared to a large grinding disc, the replacement cost of a small grinding disc is lower.

[0038] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes made to it without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. An impact gyratory mill, characterized in that: The system includes a vibrating platform, an upper grinding disc, a lower grinding disc, a material tray, a column, and a housing. The vibrating platform is equipped with a vibrating motor that generates vibration in a spiral-upward to a reverse spiral-downward direction. The upper grinding disc rests on the lower grinding disc and has a feed hole through which material is added. The lower grinding disc is mounted on the vibrating platform and is driven to vibrate by the platform. The material tray receives material falling from the grinding disc, and its lower edge is mounted on the lower grinding disc or the vibrating platform so that it vibrates synchronously with the platform. The material tray contains a spiral channel structure, with the opening at the end of the spiral channel located at the feed hole of the upper grinding disc. The material tray has... The screen has holes. The column is mounted on the base of the vibrating platform. During operation, the column does not vibrate and its position remains fixed. The upper and lower grinding discs each have a center hole at their center, through which the column passes. A ratchet structure is provided between the upper grinding disc and the column. The ratchet structure, in conjunction with the vibration, allows the upper grinding disc to rotate unidirectionally simultaneously during vibration. A spring is provided on the upper grinding disc, providing a downward elastic force. The spring is nested on the column, with its lower end directly or indirectly abutting the upper grinding disc and its upper end abutting the column. The housing is located outside the material tray and encloses the material tray inside the housing. The housing has a discharge port.

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

3. The impact gyratory mill according to claim 1, characterized in that: The material tray is equipped with a hopper, and the lower edge of the hopper is mounted on the material tray.

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

5. The impact gyratory mill according to claim 2, characterized in that: 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 guide cylinder passes through the opening of the cover and is inserted into the cover.

6. The impact gyratory mill according to claim 1, characterized in that: The lower surface of the upper grinding disc is provided with a guide groove. 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 gradually decreases from the starting end to the other end until it is flush with the lower surface of the upper grinding disc.

7. The impact gyratory mill according to claim 1, characterized in that: The lower surface of the upper grinding disc and the upper surface of the lower grinding disc are respectively provided with a series of stripes.

8. The impact gyratory mill according to claim 1, characterized in that: The upper end of the column is threaded, and a bolt is installed on the threaded part. The upper end of the spring rests on the bolt.

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