A multi-point floating transmission high-pressure roller grinding mill and mineral crushing method

Abstract

The present invention discloses a multi-point floating transmission high-pressure roller grinding mill, comprising a movable extrusion roller and a fixed extrusion roller. A first starting motor group drives the movable extrusion roller to rotate via a movable extrusion roller gear group; a second moving motor group drives the fixed extrusion roller to rotate via a fixed extrusion roller gear group. The movable extrusion roller gear group comprises a first housing, within which a fixed gear, a first power gear, and an movable extrusion roller gear are mounted. The output end of the first starting motor is connected to the first power gear, which meshes with the fixed gear. The movable extrusion roller gear is mounted on the shaft of the movable extrusion roller, and a floating transmission structure is connected between the movable extrusion roller gear and the fixed gear. The fixed extrusion roller gear group comprises a second housing, within which a fixed extrusion roller gear and a second power gear are mounted. The output end of the second starting motor is connected to the second power gear, which meshes with the fixed extrusion roller gear, which is mounted on the shaft of the fixed extrusion roller. This significantly reduces the manufacturing cost of the equipment, and the small motor is easy to repair and maintain, resulting in low costs and convenient inventory stocking.

Description

Technical Field

[0001] The invention relates to the technical field of roller mills, in particular to a multi-point floating transmission high-pressure roller mill and a mineral crushing method. Background Art

[0002] The high-pressure roller mill (HPGR) is a highly efficient and energy-saving crushing device that differs from traditional crushing technologies in two key ways. First, it utilizes quasi-static pressure crushing, which saves approximately 30% energy compared to impact crushing. Second, it achieves layer-by-layer crushing, effectively creating a mutual comminution of materials. This principle significantly improves crushing efficiency and reduces wear compared to traditional crushing and ball milling technologies. The compressive stress between materials can be adjusted by adjusting the pressure of the rollers. The entire roller grinding process is achieved using two counter-rotating rollers: one fixed and the other movable. The traditional HPGR structure follows the sequence: motor → universal joint → reducer → roller mill body.

[0003] The main motor is the power source of the HPGR and is located on the transmission side of the HPGR. The transmission assembly consists of a motor, a universal joint, and a reducer, such as CN216025098U. Due to its structural and operating characteristics, the diameter and width of the extrusion roll determine the processing capacity of the HPGR. If a large processing volume is required, the diameter and width of the extrusion roll must be increased, which will inevitably increase the power of the motor and the size of the associated reducer and universal joint. Currently, this is a solution to the large-scale HPGR. This will also cause the power of a single motor of the equipment to exceed 4000kw. The extremely high power means that only a very small number of manufacturers can manufacture the motor, and it is expensive. This not only increases the manufacturing cost of the equipment, but also poses a great challenge to the manufacturers of the supporting equipment. If the HPGR needs to be large-scale, this is a problem that must be solved.

[0004] The larger the equipment, the more likely it is to have a driving force problem. Larger equipment will also result in larger motors and reducers. Larger motors and reducers will make manufacturing more difficult, and their accessories will also be difficult to manufacture, significantly increasing equipment costs, which is not worth the cost.

[0005] As motor power increases, energy consumption also rises. The reducer, along with the associated components, also increases in size. This significantly increases manufacturing and operating costs, limiting the scale-up of high-pressure grinding rollers. This also complicates maintenance and requires increased inventory of spare parts. Summary of the Invention

[0006] The technical problem to be solved by the present invention is how to solve the problems of increased manufacturing cost and difficulty in maintenance caused by the enlargement of all supporting components of the high-pressure roller grinding mill.

[0007] In order to solve the above technical problems, the inventors have come up with the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0008] A multi-point floating transmission high-pressure roller grinding mill includes an extrusion movable roller and an extrusion fixed roller, and further includes:

[0009] Start the motor group 1, and drive the extrusion roller to rotate through the roller gear group;

[0010] Start the second motor group, and drive the fixed roller to rotate through the fixed roller gear group;

[0011] The starting motor group 1 includes multiple groups of starting motors 1, and the starting motor group 2 includes multiple groups of starting motors 2;

[0012] The movable roller gear set includes a box body 1, in which a fixed gear, a power gear 1 and an extrusion movable roller gear are installed. The output end of the starting motor 1 is connected to the power gear 1, and the power gear 1 is meshed with the fixed gear. The extrusion movable roller gear is installed on the shaft of the extrusion movable roller, and a floating transmission structure is connected between the extrusion movable roller gear and the fixed gear.

[0013] The fixed roller gear set includes a second box body, inside which are installed the extrusion fixed roller gear and the second power gear. The output end of the second starting motor is connected to the second power gear. The second power gear is engaged with the extrusion fixed roller gear. The extrusion fixed roller gear is installed on the shaft of the extrusion fixed roller.

[0014] Preferably, the floating transmission structure includes a floating gear frame and a floating gear, the floating gear frame includes a connecting frame body 1 and a connecting frame body 2, one end of the connecting frame body 1 and the connecting frame body 2 are hingedly arranged, the other end of the connecting frame body 1 is installed on the shaft of the fixed gear, and the other end of the connecting frame body 2 is installed on the shaft of the extrusion movable roller gear, the floating gear is installed at the hinge node of the connecting frame body 1 and the connecting frame body 2, and the floating gear is engaged with the extrusion fixed roller gear and the fixed gear at the same time.

[0015] Preferably, the starting motor group 1 is installed on the side of the box body 1, and the starting motor group 2 is installed on the side of the box body 2.

[0016] Preferably, the interior of box body one and box body two are both equipped with an overload protection structure and a material reversal structure. When starting motor group one and starting motor group two are overloaded, the overload protection structure drives the fixed gear and the extrusion fixed roller gear to flip through the material reversal structure.

[0017] Preferably, the overload protection structure includes a drive disk installed at the output end of starter motor 1 and starter motor 2, and a plurality of groups of fixed torque floating bodies are arranged at equal intervals along the axial direction on the drive disk, and the end faces of power gear 1 and power gear 2 are provided with groove 1 suitable for floating sockets of fixed torque floating bodies.

[0018] Preferably, a mounting groove is provided inside the driving disk, and top cone 1 and top cone 2 are installed inside the mounting groove. Top cone 1 is suitable for being socketed in groove 1, and top cone 2 is suitable for being socketed in groove 2. Elastomer 1 is installed between the ends of top cone 1 and top cone 2, and elastomer 2 is installed on the outer side of top cone 2 located inside the mounting groove. The elastic coefficient of elastomer 1 is smaller than the elastic coefficient of elastomer 2.

[0019] Preferably, the material reversal structure includes a gear sleeve sleeved on the outer side of the output end of the starter motor 1 and the starter motor 2, the outer side of the gear sleeve is meshed with a driven gear ring, the driven gear ring is rotatably installed in the box body 1 and the box body 2, the teeth of one set of driven gear rings are meshed with the teeth of the fixed gear via the corresponding driven wheel, and the teeth of the other set of driven gear rings are meshed with the teeth of the extrusion fixed roller gear via the corresponding driven wheel;

[0020] The gear sleeve and the output end rotate relatively, and a second groove is provided on the gear sleeve. The second groove is suitable for fitting with the fixed moment floating body after being separated from the first groove.

[0021] A mineral crushing method using a multi-point floating transmission high-pressure roller mill, comprising the following steps:

[0022] The starting motor drives the power gear to rotate, the power gear drives the fixed gear to rotate, the fixed gear drives the extrusion roller gear to rotate through the floating gear, and the extrusion roller gear rotates together with the extrusion roller;

[0023] The second starting motor drives the second power gear to rotate, the second power gear drives the extrusion fixed roller gear to rotate, and the extrusion fixed roller gear rotates together with the extrusion fixed roller;

[0024] The extrusion roller rotates clockwise and the extrusion fixed roller rotates counterclockwise to crush the minerals;

[0025] When the machine is stuck, the top cone 1 separates from the groove 1 and compresses the elastic body to make the top cone 2 contact the end face of the gear sleeve and then fit into the groove 2 or make the top cone 2 directly fit into the groove 2. The starting motor 1 and the starting motor 2 drive the gear sleeve to rotate. The gear sleeve drives the extrusion fixed roller gear to rotate clockwise and the extrusion dynamic roller gear to rotate counterclockwise through the driven gear ring and the driven wheel to reverse the mineral. After the mineral is reversed, the pusher 1 re-enters the groove 1 for a while, and drives the extrusion fixed roller and the extrusion dynamic roller to crush the mineral again.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] Compared to traditional high-pressure roller grinding (HPGR) structures, this design is simpler. The required torque is calculated through a combination of theoretical and practical calculations and then distributed to the appropriate motors. The number of motors required can be determined based on the size of the equipment, with the power and speed of each motor adjusted via a frequency converter. This achieves the equipment's intended purpose. The main motor is converted from one high-power motor to two or more low-power motors. A floating gear system solves the problem of left-right movement of the extrusion rollers. A large gear stage effectively increases the input torque, significantly reducing the equipment's manufacturing costs. The smaller motors are easier to overhaul and maintain, resulting in lower costs and easier inventory stocking. Compared to other processing technologies, this solution is highly efficient, providing a new solution for large-scale equipment.

[0028] At the same time, the inventor also found that the jamming phenomenon is easy to occur under actual working conditions. The inventor took advantage of the separation of the fixed torque floating body on the driving disk from the power gear to drive the rotation of the gear sleeve, so that the extrusion dynamic roller gear and the extrusion fixed roller gear are driven by the driven gear ring to rotate in the opposite direction, automatically reversing the blocked material to prevent it from getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front view of the overall structure of the present invention;

[0030] Figure 2 It is a top view of the overall structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of box body 1 and box body 2 in one form of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of another form of box body 1 and box body 2 of the present invention;

[0033] Figure 5 This is a schematic diagram of the interior structure of another form of the box of the present invention (the bottom is ignored);

[0034] Figure 6 for Figure 1 An enlarged view of the internal structure of the drive disc in one of the above methods;

[0035] Figure 7 for Figure 1 A magnified view of the internal structure of the drive disc in another method;

[0036] Figure 8 for Figure 1 Side view of the middle gear sleeve;

[0037] Figure 9 for Figure 1 Side view of the power gear.

[0038] In the figure: 1. Extrusion roller; 2. Extrusion fixed roller; 3. Starting motor 1; 4. Starting motor 2; 5. Box 1; 6. Fixed gear; 7. Power gear 1; 8. Extrusion roller gear; 9. Box 2; 10. Extrusion fixed roller gear; 11. Power gear 2; 12. Floating gear rack; 13. Floating gear; 14. Fixed torque floating body; 15. Groove 1; 16. Gear sleeve; 17. Groove 2; 18. Mounting slot; 19. Top cone 1; 20. Top cone 2; 21. Elastic body 1; 22. Elastic body 2; 23. Driven gear ring; 24. Driven wheel; 25. Drive disc; 26. Electromagnetic pole piece 1; 27. Electromagnetic pole piece 2. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described 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 the embodiments.

[0040] 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 limiting the present invention.

[0041] Example 1, as Figures 1 to 9 As shown, a multi-point floating transmission high pressure roller grinding mill includes an extrusion movable roller 1 and an extrusion fixed roller 2, and also includes:

[0042] Start the motor group 1, and drive the extrusion roller 1 to rotate through the dynamic roller gear group;

[0043] Start the second motor group, and drive the extrusion fixed roller 2 to rotate through the fixed roller gear group;

[0044] The starting motor group 1 includes multiple groups of starting motors 1 3, and the starting motor group 2 includes multiple groups of starting motors 2 4;

[0045] The movable roller gear set includes a box body 5, inside which are installed a fixed gear 6, a power gear 7 and an extrusion movable roller gear 8. The output end of the starting motor 3 is connected to the power gear 7, which is meshed with the fixed gear 6. The extrusion movable roller gear 8 is installed on the shaft of the extrusion movable roller 1, and a floating transmission structure is connected between the extrusion movable roller gear 8 and the fixed gear 6.

[0046] The fixed roller gear set includes a box body 2 9, inside which are installed an extrusion fixed roller gear 10 and a power gear 2 11. The output end of the starting motor 2 4 is connected to the power gear 2 11, and the power gear 2 11 is engaged with the extrusion fixed roller gear 10. The extrusion fixed roller gear 10 is installed on the shaft of the extrusion fixed roller 2.

[0047] The floating transmission structure includes a floating gear frame 12 and a floating gear 13. The floating gear frame 12 includes a connecting frame body 1 and a connecting frame body 2. One end of the connecting frame body 1 and the connecting frame body 2 are hingedly arranged, and the other end of the connecting frame body 1 is installed on the shaft of the fixed gear 6, and the other end of the connecting frame body 2 is installed on the shaft of the extrusion movable roller gear 8. The floating gear 13 is installed at the hinge node of the connecting frame body 1 and the connecting frame body 2. The floating gear 13 is engaged with the extrusion fixed roller gear 10 and the fixed gear 6 at the same time.

[0048] The starting motor group 1 is mounted on the side of the housing 1 5, and the starting motor group 2 is mounted on the side of the housing 2 9. The transmission ratio between the power gear 1 7 and the fixed gear 6 is (4-10):1, the transmission ratio between the power gear 2 11 and the extrusion fixed roller gear 10 is (4-10):1, and the transmission ratio between the extrusion dynamic roller gear 8, the fixed gear 6, and the floating gear 13 is 1:1:1.

[0049] Multiple starting motors 1 3 and 2 drive the power gears at the output end, which in turn drive the fixed gear 6 and the extrusion fixed roller gear 10 (extrusion fixed roller 2) to rotate. The fixed gear 6 drives the extrusion movable roller 8 via the floating gear 13 on the floating gear rack 12. The extrusion movable roller 8 and the extrusion fixed roller gear 10 rotate in opposite directions. The extrusion movable roller 1 can move left and right relative to the roller mill (the existing hydraulic accumulator and oil cylinder can achieve 40-70mm displacement adjustment). During the adjustment process, the floating gear 13 will always be engaged with the extrusion movable roller gear 8 and the fixed gear 6.

[0050] Example 2, as Figure 4 and Figure 6 、 Figure 8 and Figure 9 As shown, the following improvements are made on the basis of the above embodiment: the interior of the box body 1 5 and the box body 2 9 are both installed with an overload protection structure and a material reversal structure. When the starting motor group 1 and the starting motor group 2 are overloaded, the overload protection structure drives the fixed gear 6 and the extrusion fixed roller gear 10 to flip through the material reversal structure.

[0051] The overload protection structure includes a drive disk 25 installed at the output end of the starter motor 3 and the starter motor 2 4. A plurality of groups of fixed torque floating bodies 14 are arranged at equal intervals along the axial direction on the drive disk 25. The end faces of the power gear 1 7 and the power gear 2 11 are provided with a groove 15 suitable for floating sockets of the fixed torque floating bodies 14.

[0052] The driving disk 25 is provided with a mounting groove 18 inside, and a top cone 19 and a top cone 2 20 are installed inside the mounting groove 18. The top cone 19 is suitable for being inserted and socketed in the groove 15, and the top cone 20 is suitable for being inserted and socketed in the groove 2 17. An elastic body 1 21 is installed between the ends of the top cone 19 and the top cone 2 20. The outer side of the top cone 2 20 located inside the mounting groove 18 is provided with an elastic body 22. The elastic coefficient of the elastic body 1 21 is greater than the elastic coefficient of the elastic body 22.

[0053] The material return structure includes a gear sleeve 16 mounted on the outer side of the output end of the starter motor 3 and the starter motor 2 4. The outer side of the gear sleeve 16 is meshed with a driven gear ring 23. The driven gear ring 23 is rotatably mounted in the box body 5 and the box body 2 9. The teeth of one set of driven gear rings 23 are meshed with the teeth of the fixed gear 6 via the corresponding driven wheel 24, and the teeth of the other set of driven gear rings 23 are meshed with the teeth of the extrusion fixed roller gear 10 via the corresponding driven wheel 24.

[0054] The gear sleeve 16 and the output end rotate relative to each other. The gear sleeve 16 is provided with a second groove 17 . The second groove 17 is suitable for fitting with the fixed moment floating body 14 after being separated from the first groove 15 .

[0055] When top cone 19 fits within groove 15, it must ensure the torque required to drive fixed gear 6 and extrusion fixed roller gear 10 to crush the mineral. When top cone 20 fits within groove 2 16, it must ensure the torque required to drive fixed gear 6 and extrusion fixed roller gear 10 to remove the mineral. The transmission ratio of gear sleeve 16, extrusion fixed roller gear 10, and fixed gear 6 is (2-5):1. Driven gear 24 is a thick gear and is rotatably mounted on the corresponding inner wall of the housing.

[0056] When the strength of the particles in the ore material is greater than the crushing strength of the extrusion fixed roller 2 and the extrusion movable roller 1, the input ends of the extrusion fixed roller gear 10 and the extrusion movable roller gear 8 are overloaded, the top cone 19 and the groove 15 are separated, and then the elastic body 21 (spring) is compressed. At this time, the driving disk 25 continues to rotate. When the top cone 120 has the conditions to enter the interior of the groove 2 17, that is, when the end of the top cone 120 and the groove 2 17 coincide in the axial direction, the elastic coefficient of the elastic body 22 is less than the elastic coefficient of the elastic body 1 21. The elastic body 22 will first push the top cone 220 into the groove 2 17, and then the output end directly drives the gear sleeve 16 to rotate. The driven gear ring 23 is driven to rotate, and then the driven wheel 24 drives the extrusion fixed roller gear 10 and the extrusion movable roller gear 8 to rotate to reverse the ore. After the reverse, since the transmission ratio of the gear sleeve 16 and the extrusion fixed roller gear 10 and the extrusion movable roller gear 8 is not 1:1, there is a differential motion. When the top cone 19 has the conditions to enter the interior of the groove 15, that is, when the end of the top cone 19 and the groove 15 coincide with each other in the axial direction, the elastic body 1 21 pushes the top cone 19 to re-enter the torsional groove 15, and the elastic body 2 22 resets the top cone 20 to disengage from the groove 2 17, and the output end will directly drive the gear body 23 to rotate again.

[0057] like Figure 7 As shown, electromagnetic pole piece 2 is provided at the end of top cone 1 20 and top cone 2 21, and electromagnetic pole piece 1 26 is provided on the other side of electromagnetic pole piece 21. Limit plates are fixed on both sides of the driving disk 25 by bolts, and a group of electromagnetic pole pieces are also provided on the limit plate opposite to electromagnetic pole piece 1 26. An energized coil is provided in the electromagnetic pole piece. After the energized coil is powered, the electromagnetic pole piece becomes magnetic and the direction of the magnetic force is controlled. The use of magnetic force can eliminate the problem that the spring cannot be reset in a short time.

[0058] A mineral crushing method using a multi-point floating transmission high-pressure roller mill, comprising the following steps:

[0059] The starting motor 3 drives the power gear 7 to rotate, the power gear 7 drives the fixed gear 6 to rotate, the fixed gear 6 drives the extrusion roller gear 8 to rotate through the floating gear 13, and the extrusion roller gear 8 rotates together with the extrusion roller 1;

[0060] Start the second motor 4 to drive the second power gear 11 to rotate, the second power gear 11 drives the extrusion fixed roller gear 10 to rotate, and the extrusion fixed roller gear 10 rotates together with the extrusion fixed roller 2;

[0061] The extrusion roller 1 rotates clockwise and the extrusion fixed roller 2 rotates counterclockwise to crush the minerals;

[0062] When the car is stuck, the top cone 19 separates from the groove 15 and compresses the elastic body 1 21, causing the top cone 2 20 to contact the end face of the gear sleeve 16 and then fit into the groove 2 17 or causing the top cone 20 to directly fit into the groove 2 17. The starting motor 1 3 and the starting motor 2 4 drive the gear sleeve 16 to rotate. The gear sleeve 16 drives the extrusion fixed roller gear 10 to rotate clockwise and the extrusion movable roller gear 8 to rotate counterclockwise through the driven gear ring 23 and the driven wheel 24 to reverse the mineral. After the mineral is reversed, the push-pull 19 will re-enter the groove 15, and the push-pull 20 will re-exit the groove 2 17, and directly drive the extrusion fixed roller 2 and the extrusion movable roller 1 to crush the mineral again.

[0063] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacement may be a replacement of a portion of a structure, device, or method step, or it may be a complete technical solution. Any equivalent replacement or modification based on the technical solution and inventive concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A multi-point floating transmission high pressure roller grinding mill, comprising an extrusion movable roller (1) and an extrusion fixed roller (2), characterized in that: Also includes: Start the motor group 1, and drive the extrusion roller (1) to rotate through the roller gear group; Start the second motor group, and drive the extrusion fixed roller (2) to rotate through the fixed roller gear group; The starting motor group 1 includes a plurality of starting motor groups 1 (3), and the starting motor group 2 includes a plurality of starting motor groups 2 (4); The movable roller gear set includes a box body (5), a fixed gear (6), a power gear (7) and an extrusion movable roller gear (8) are installed inside the box body (5), the output end of the starting motor (3) is connected to the power gear (7), the power gear (7) and the fixed gear (6) are meshed, the extrusion movable roller gear (8) is installed on the shaft of the extrusion movable roller (1), and a floating transmission structure is connected between the extrusion movable roller gear (8) and the fixed gear (6); The fixed roller gear set includes a second housing (9), an extrusion fixed roller gear (10) and a second power gear (11) are installed inside the second housing (9), the output end of the second starting motor (4) is connected to the second power gear (11), the second power gear (11) and the extrusion fixed roller gear (10) are meshed, and the extrusion fixed roller gear (10) is installed on the shaft of the extrusion fixed roller (2); The inside of the box body 1 (5) and the box body 2 (9) are both equipped with an overload protection structure and a material reversal structure. When the starting motor group 1 and the starting motor group 2 are overloaded, the overload protection structure drives the fixed gear (6) and the extrusion fixed roller gear (10) to flip through the material reversal structure. The overload protection structure includes a drive disk (25) installed at the output end of the starter motor 1 (3) and the starter motor 2 (4), a plurality of groups of fixed torque floating bodies (14) are arranged at equal intervals along the axial direction on the drive disk (25), and the end faces of the power gear 1 (7) and the power gear 2 (11) are provided with a groove 1 (15) suitable for floating sockets of the fixed torque floating bodies (14); The material reversal structure includes a gear sleeve (16) mounted on the outer side of the output end of the starter motor 1 (3) and the starter motor 2 (4), the outer side of the gear sleeve (16) is meshed with a driven gear ring (23), and the driven gear ring (23) is rotatably mounted in the box body 1 (5) and the box body 2 (9), the teeth of one set of driven gear rings (23) are meshed with the teeth of the fixed gear (6) through the corresponding driven wheel (24), and the teeth of the other set of driven gear rings (23) are meshed with the teeth of the extrusion fixed roller gear (10) through the corresponding driven wheel (24); The gear sleeve (16) and the output end rotate relative to each other. The gear sleeve (16) is provided with a second groove (17). The second groove (17) is suitable for fitting with the fixed moment floating body (14) after being separated from the first groove (15).

2. The multi-point floating transmission high pressure grinding roller according to claim 1, characterized in that: The floating transmission structure includes a floating gear frame (12) and a floating gear (13). The floating gear frame (12) includes a connecting frame body 1 and a connecting frame body 2. One end of the connecting frame body 1 and the connecting frame body 2 are hingedly arranged. The other end of the connecting frame body 1 is installed on the shaft of the fixed gear (6), and the other end of the connecting frame body 2 is installed on the shaft of the extrusion movable roller gear (8). The floating gear (13) is installed at the hinge node of the connecting frame body 1 and the connecting frame body 2. The floating gear (13) is meshed with the extrusion fixed roller gear (10) and the fixed gear (6) at the same time.

3. The multi-point floating transmission high pressure grinding roller according to claim 1, characterized in that: The starting motor group 1 is installed on the side of the box body 1 (5), and the starting motor group 2 is installed on the side of the box body 2 (9).

4. The multi-point floating transmission high pressure grinding roller according to claim 2, characterized in that: The driving disc (25) is provided with a mounting groove (18) inside, and a top cone 1 (19) and a top cone 2 (20) are installed inside the mounting groove (18). The top cone 1 (19) is suitable for being inserted into the groove 1 (15), and the top cone 2 (20) is suitable for being inserted into the groove 2 (17). An elastic body 1 (21) is installed between the ends of the top cone 1 (19) and the top cone 2 (20). The outer side of the top cone 2 (20) located inside the mounting groove (18) is provided with an elastic body 2 (22). The elastic coefficient of the elastic body 1 (21) is smaller than the elastic coefficient of the elastic body 2 (22).

5. A mineral pulverizing method using a multi-point floating transmission high pressure roller grinding mill as claimed in claim 4, characterized in that: Here are the steps: The starting motor 1 (3) drives the power gear 1 (7) to rotate, the power gear 1 (7) drives the fixed gear (6) to rotate, the fixed gear (6) drives the extrusion roller gear (8) to rotate via the floating gear (13), and the extrusion roller gear (8) rotates together with the extrusion roller (1); The second starting motor (4) drives the second power gear (11) to rotate, the second power gear (11) drives the extrusion fixed roller gear (10) to rotate, and the extrusion fixed roller gear (10) rotates together with the extrusion fixed roller (2); The extrusion roller (1) rotates clockwise, and the extrusion roller (2) rotates counterclockwise to crush the minerals; When the machine is stuck, the top cone 1 (19) separates from the groove 1 (15) and compresses the elastic body 1 (21), causing the top cone 2 (20) to contact the end face of the gear sleeve (16) and then fit into the groove 2 (17) or causing the top cone 2 (20) to directly fit into the groove 2 (17). The starting motor 1 (3) and the starting motor 2 (4) drive the gear sleeve (16) to rotate. The gear sleeve (16) drives the extrusion fixed roller gear (10) to rotate clockwise and the extrusion dynamic roller gear (8) to rotate counterclockwise through the driven gear ring (23) and the driven wheel (24) to reverse the mineral. After the mineral is reversed, the pusher 1 (19) will re-enter the groove 1 (15) and drive the extrusion fixed roller (2) and the extrusion dynamic roller (1) to crush the mineral again.

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