A vertical multi-shaft variable-direction spiral stirring mill system

Abstract

The utility model relates to a vertical multi-shaft variable direction spiral stirring mill system, belonging to the technical field of ore grinding equipment, including drive system, hydraulic system, damping anti-deviation system, stirring system, flow system, support system, through the equidistance addition of three vice stirring shafts around the main stirring shaft, the main stirring shaft and three vice stirring shafts jointly act, can greatly improve the processing capacity of current vertical stirring mill, through the meshing of different gear pairs in gear mechanism and form two different steering, and then make the main stirrer and vice stirrer have opposite spiral motion and same direction spiral motion, the indirect control of different gear pairs intermeshing of hydraulic system, and then realize the different motion state between stirrers, satisfy the required grinding and discharge two working conditions, the two layers of anti-deviation support parts in the damping anti-deviation system arranged on the top of cylinder can effectively reduce the vibration generated in the power transmission process, improve the stability of working process, increase the fillet with larger radian in the local position in the cylinder, make the grinding medium ball gather to the middle position of cylinder, avoid too many medium balls close to the edge of cylinder wall, increase the proportion of medium ball participating in grinding, and then improve the working efficiency of vertical stirring mill.

Description

Technical Field

[0001] This invention belongs to the technical field of grinding equipment, and particularly relates to a vertical multi-shaft variable direction spiral stirring mill system. Background Technology

[0002] A vertical spiral stirred mill is an ultrafine grinding device. The mill consists of a transmission device, a cylinder, a spiral agitator, and a frame. Driven by a motor and other transmission devices, the spiral agitator blades rotate within a cylinder filled with grinding media and slurry. This causes the grinding media and slurry to undergo multidimensional circulation and rotation within the cylinder. Under the combined effects of gravity, centrifugal force generated by the spiral rotation, and mutual friction, along with minor impacts and shearing, the material is effectively ground.

[0003] However, most existing vertical spiral stirred mills operate with a single-shaft spiral agitator, which suffers from a limited working environment within the mill cylinder. Furthermore, the limited range of action of a single-shaft spiral agitator and the accumulation of grinding media balls around the inner wall of the cylinder further hinder the achievement of ideal grinding efficiency. On the other hand, the connection between the upper end of the agitator shaft and the transmission device such as the motor in current vertical spiral stirred mills relies heavily on bearings to reduce vibrations generated during transmission and swaying caused by the additional load applied to the agitator by the grinding media; devices with vibration damping capabilities are relatively few. Therefore, it is necessary to explore new structural forms of vertical spiral stirred mill systems to solve the problems of a limited working environment, inadequate grinding efficiency, and swaying caused by agitator vibration. Summary of the Invention

[0004] This invention provides a vertical multi-axis variable-direction spiral stirred mill system. The outer shell of the cylinder is designed as a three-lobed circular shell connected tangentially by an inward concave arc, and the bottom and surrounding walls of the cylinder are designed with large-radius rounded corners. This allows the system to accommodate three additional agitators, enabling diversified working states and reducing the accumulation of grinding media balls around the cylinder wall. A hydraulic system and a movable gear mechanism are additionally installed above the cylinder, allowing the system to more flexibly change the required working state and improve the working efficiency of the vertical stirred mill. A vibration damping and anti-deviation system is added between the top of the cylinder and the drive system to solve problems such as swaying caused by vibration during transmission.

[0005] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0006] A vertical multi-shaft variable-direction spiral stirred mill system includes a drive system, a hydraulic system, a vibration damping and anti-deviation system, a stirring system, a flow system, and a support system. The drive system includes a motor, cylindrical roller bearings, and a gear mechanism; the hydraulic system includes a hydraulic cylinder, a hydraulic piston, rotatable balls, and hydraulic pipelines; the vibration damping and anti-deviation system includes a first-layer anti-deviation support bracket at the top of the cylinder, a second-layer anti-deviation support bracket at the top of the cylinder, a main drive connecting shaft, a first auxiliary drive connecting shaft, a second auxiliary drive connecting shaft, a third auxiliary drive connecting shaft, a main drive connecting flange, a first auxiliary drive connecting flange, a second auxiliary drive connecting flange, and a third auxiliary drive connecting flange; the stirring system includes a main stirring shaft, a first auxiliary stirring shaft, a second auxiliary stirring shaft, a third auxiliary stirring shaft, main propeller blades, a first auxiliary propeller blade, a second auxiliary propeller blade, and a third auxiliary propeller blade; the flow system includes a feed inlet, a discharge outlet, a grinding media ball inlet, and a mill door; the support system includes a cylinder, a gear mechanism, a protective shell for the hydraulic system, and wear-resistant liners.

[0007] Furthermore, the gear mechanism includes a main gear, a first auxiliary gear, a second auxiliary gear, a third auxiliary gear, an internal gear ring, and a connecting rod. The main gear can mesh with the first auxiliary gear, the second auxiliary gear, and the third auxiliary gear, which are equidistantly distributed in a circle, and the first auxiliary gear, the second auxiliary gear, and the third auxiliary gear can mesh with the internal gear ring. At the same time, the main gear and the internal gear ring each have three threaded holes equidistantly distributed in a circle on their upper surfaces, and the connecting rod has threaded holes of the same distance and diameter as the main gear. Each connecting rod is sequentially connected to the main gear and the internal gear ring by bolt threads, so that the main gear and the internal gear ring rotate at the same angular velocity.

[0008] Furthermore, the hydraulic system's hydraulic lines sequentially connect the lower parts of four equidistantly distributed hydraulic cylinders. Each hydraulic cylinder has a hydraulic piston rod nested in its upper part and is subject to limiting treatment. A rotatable ball is embedded in the top of the hydraulic piston rod. The rotatable ball makes point-to-surface contact with the internal gear ring of the gear mechanism to reduce frictional wear caused by contact during rotation. The hydraulic system controls the increase and decrease of the flow rate within the hydraulic lines to control the raising and lowering of the hydraulic piston rod, thereby realizing the rising and falling of the main gear and the internal gear ring fixed in the gear mechanism. Both the main gear and the internal gear ring can serve as driving gears, and the first auxiliary gear and the second... The secondary gear and the third secondary gear are driven gears. When the hydraulic piston column of the hydraulic system is in the lifting state, the main gear meshes with the first, second, and third secondary gears. When the main gear rotates clockwise, the first, second, and third secondary gears rotate counterclockwise. When the hydraulic piston column is in the retracted state, the internal gear ring meshes with the first, second, and third secondary gears. When the internal gear ring rotates clockwise, the first, second, and third secondary gears also rotate clockwise. Through the action of the hydraulic system, the driven gears of the gear mechanism have two operating states of rotation direction.

[0009] Furthermore, the first and second anti-deviation brackets on the top of the cylinder of the vibration damping and anti-deviation system are provided with circular through holes corresponding to the center positions of the main gear and the three auxiliary gears. The main drive connecting shaft, the first auxiliary drive connecting shaft, the second auxiliary drive connecting shaft, and the third auxiliary drive connecting shaft are all clearance-fitted with the circular through holes on the first anti-deviation bracket on the top of the cylinder and the corresponding circular through holes of the gears to reduce certain vibrations caused by the gear transmission process. Each drive connecting shaft has a journal section slightly larger than the diameter of the circular through hole on the anti-deviation bracket to position the drive connecting shaft and provide support. Each drive connecting shaft is provided with a keyway and connected to the corresponding gear through a key.

[0010] Furthermore, the first and second anti-deviation supports on the top of the cylinder of the vibration damping and anti-deviation system are fixed to the protruding platforms on the inner wall of the cylinder by welding. The cylinder of the support system is composed of three groups of steel plates, each group including four different shapes, connected by welding. The bottom of the cylinder and the connection between the cylinder and the cylinder wall corresponding to the three auxiliary connecting drive shafts are rounded to facilitate the gathering of grinding media and slurry towards the middle of the cylinder. Wear-resistant liners corresponding to the steel plates of each shape are fixedly connected to the inner wall of the cylinder by welding. On this basis, two steel plates of one group on the cylinder wall are opened into grinding doors and connected by hinges for equipment inspection and maintenance.

[0011] Furthermore, the main stirring shaft, the first auxiliary stirring shaft, the second auxiliary stirring shaft, and the third auxiliary stirring shaft of the stirring system are fitted with corresponding circular through holes in the second layer of anti-deviation brackets on the top of the cylinder to reduce vibrations caused by the transmission shaft and the stirring shafts stirring the grinding media and slurry. The shaft sections in contact with the main stirring shaft and the main transmission shaft, the first auxiliary stirring shaft and the first auxiliary transmission shaft, the second auxiliary stirring shaft and the second auxiliary transmission shaft, and the third auxiliary stirring shaft and the third auxiliary transmission shaft are all machined with external threads. The inner rings of the main transmission flange, the first auxiliary transmission flange, the second auxiliary transmission flange, and the third auxiliary transmission flange of the vibration damping and anti-deviation system are also machined with internal threads that can mate with the external threads of the shafts. Each stirring shaft and the transmission shaft are threadedly connected to the transmission flange to ensure the stability of the transmission.

[0012] Furthermore, a main propeller blade is welded to the main stirring shaft, a first auxiliary propeller blade is welded to the first auxiliary stirring shaft, a second auxiliary propeller blade is welded to the second auxiliary stirring shaft, and a third auxiliary propeller blade is welded to the third auxiliary stirring shaft. The distance between the edge of the main propeller blade and the edges of the other three auxiliary propeller blades is s1, and the distance between the edge of the auxiliary propeller blade and the wear-resistant liner on the inner wall of the cylinder is s2. The diameter of the grinding media balls filled inside the vertical multi-shaft variable direction spiral stirring mill system is d. The distance s1 is required to satisfy d < s1 < 2d, and the distance s2 is required to satisfy d < s2 < 1.2d to prevent the grinding media balls from getting stuck.

[0013] Furthermore, the upper surface of the protective housing of the gear mechanism and hydraulic system of the support system is provided with stepped circular holes. A cylindrical roller bearing is installed in the larger diameter circular hole, with the outer ring of the bearing interference fit with the circular hole and the inner ring of the bearing interference fit with the main drive shaft. The smaller diameter circular hole is used for the extension of the main drive shaft. The output shaft of the motor of the drive system is connected to the main drive shaft through a coupling. A circular steel plate is welded to the bottom of the protective housing of the gear mechanism and hydraulic system to fix the hydraulic cylinder body supporting the hydraulic system. The side wall of the protective housing of the gear mechanism and hydraulic system is provided with a circular through hole for the connection of hydraulic pipelines.

[0014] Furthermore, the feed inlet, discharge outlet, and grinding media inlet of the circulation system are all cylindrical pipes with a certain diameter opened on the cylinder wall. The feed inlet is a cylindrical pipe opened near the bottom of the cylinder close to the main stirring shaft, and the discharge outlet is a cylindrical pipe opened near the top of the cylinder close to the third auxiliary stirring shaft to realize the entry and exit of slurry. The grinding media ball inlet is a circular slot opened at a certain angle near the top of the cylinder close to the main stirring shaft to realize the input of grinding media balls. The feed inlet, discharge outlet, and grinding media inlet are all on the same vertical plane.

[0015] The working process of this invention is as follows: At the work site, the cylinder is first installed and fixed. The grinding media balls are filled into the cylinder through the grinding media ball inlet, with most concentrated in the middle of the cylinder. Then, the slurry is input through the feed inlet. The motor is started, and the hydraulic piston of the hydraulic system is first placed in the lifting (pressurizing) state, causing the main gear to mesh with the other three auxiliary gears and drive the stirring system to operate. This working state is the grinding state. In this state, the main stirring shaft rotates clockwise, causing the main propeller blades to drive the grinding media balls and slurry near the bottom of the cylinder in a spiral upward motion. The other three auxiliary stirring shafts rotate counterclockwise, causing the auxiliary propeller blades to rotate counterclockwise. The propeller blades drive the grinding media balls near the top of the cylinder to descend in a spiral motion with the slurry, thereby accelerating the grinding cycle. After working for a period of time, the particle size in the slurry gradually decreases to meet the grinding particle size requirements. The hydraulic piston column of the hydraulic system is then placed in the retracted (unpressurized) state, causing the internal gear ring to mesh with the other three auxiliary gears for operation. This working state is the discharge state. In this state, the main stirring shaft and the other three auxiliary stirring shafts rotate clockwise, causing the fine particles in the slurry to flow out of the discharge port at an accelerated speed. During the operation, as the grinding media balls wear down, new grinding media balls can be added through the grinding media ball inlet.

[0016] The beneficial effects of this invention are:

[0017] 1. By adding three auxiliary stirring shafts at equal intervals around the main stirring shaft, the combined action of the main stirring shaft and the three auxiliary stirring shafts can significantly increase the throughput of the current vertical stirred mill.

[0018] 2. Through the two different directions of rotation formed by the meshing of the main gear with the internal gear ring and the driven wheel in the gear mechanism of the drive system, the main agitator and the auxiliary agitator can have opposing spiral motion and co-directional spiral motion. The opposing spiral motion can shorten the circulation cycle of the grinding media and slurry in the cylinder and increase the number of grinding collisions between the grinding media and slurry per unit time. The co-directional spiral motion can accelerate the flow of slurry that has been ground to the desired particle size from the discharge port, thereby improving the working efficiency of the vertical stirred mill.

[0019] 3. The hydraulic piston column is raised and lowered by the hydraulic system to realize the raising and lowering of the fixedly connected main gear and internal gear ring, thereby realizing the movement state between the two agitators. It is convenient to change the raising and lowering state of the hydraulic piston column in the hydraulic system at any time according to the grinding degree of the slurry particles to meet the required grinding and discharging working states.

[0020] 4. The two-layer anti-deviation brackets installed at the top of the cylinder can effectively reduce the vibration generated by the transmission shaft during the power transmission process of receiving gear meshing, the vibration generated by the agitator shaft during the power transmission process of receiving the rotation of the transmission shaft, and the additional vibration generated by the medium balls and slurry during the agitation process of the propeller blades, thereby improving the stability of the working process.

[0021] 5. By adding a large radius of radius between the bottom of the auxiliary agitator and the cylinder wall, the media balls circulating back to the bottom of the cylinder through the auxiliary agitator are made to gather towards the middle of the cylinder, avoiding too many media balls from sticking close to the edge of the cylinder wall, increasing the proportion of media balls participating in grinding, and thus improving the working efficiency of the vertical stirred mill. Attached Figure Description

[0022] Figure 1 This is an internal cross-sectional view of a vertical multi-axis variable-direction spiral stirring mill system according to the present invention.

[0023] Figure 2 This is an isometric view of the cylinder and internal parts of a vertical multi-axis variable direction spiral stirring mill system according to the present invention.

[0024] Figure 3 This is an isometric drawing of the gear mechanism and hydraulic system of a vertical multi-axis variable direction spiral stirring mill system according to the present invention.

[0025] Figure 4 This is a side sectional view of the gear mechanism and hydraulic system of a vertical multi-axis variable direction spiral stirring mill system of the present invention in the lifting state.

[0026] Figure 5 This is a side sectional view of the gear mechanism and hydraulic system of a vertical multi-axis variable direction spiral stirring mill system of the present invention in the lowering state.

[0027] Figure 6 This is an isometric view of a vertical multi-axis variable direction spiral stirring mill system according to the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 101 is the motor, 102 is the cylindrical roller bearing, 103 is the gear mechanism, 103-1 is the main gear, 103-2 is the first auxiliary gear, 103-3 is the second auxiliary gear, 103-4 is the third auxiliary gear, 103-5 is the internal gear ring, 103-6 is the connecting rod, 201 is the hydraulic cylinder body, 202 is the hydraulic piston rod, 203 is the rotatable ball bearing, 204 is the hydraulic pipeline, 301 is the first anti-deviation support at the top of the cylinder, 302 is the second anti-deviation support at the top of the cylinder, 303 is the main drive connecting shaft, 304 is the first auxiliary drive connecting shaft, 305 is the second auxiliary drive connecting shaft, 306 is the third auxiliary drive connecting shaft, 307... 308 is the main drive connection flange, 309 is the first auxiliary drive connection flange, 310 is the third auxiliary drive connection flange, 401 is the main stirring shaft, 402 is the first auxiliary stirring shaft, 403 is the second auxiliary stirring shaft, 404 is the third auxiliary stirring shaft, 405 is the main propeller blade, 406 is the first auxiliary propeller blade, 407 is the second auxiliary propeller blade, 408 is the third auxiliary propeller blade, 501 is the feed port, 502 is the discharge port, 503 is the grinding media ball inlet, 504 is the grinding door, 601 is the cylinder, 602 is the protective shell for the gear mechanism and hydraulic system, and 603 is the wear-resistant liner. Detailed Implementation

[0030] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-6 As shown, the system includes a drive system 100, a hydraulic system 200, a vibration damping and anti-deviation system 300, a stirring system 400, a flow system 500, and a support system 600. The drive system 100 includes a motor 101, cylindrical roller bearings 102, and a gear mechanism 103; the hydraulic system 200 includes a hydraulic cylinder 201, a hydraulic piston 202, rotatable balls 203, and hydraulic pipelines 204; the vibration damping and anti-deviation system 300 includes a first-layer anti-deviation support 301 at the top of the cylinder, a second-layer anti-deviation support 302 at the top of the cylinder, a main drive connecting shaft 303, a first auxiliary drive connecting shaft 304, a second auxiliary drive connecting shaft 305, a third auxiliary drive connecting shaft 306, a main drive connecting flange 307, a first auxiliary drive connecting flange 308, and a second auxiliary drive connecting flange 309. Flange 309, third auxiliary transmission connection flange 310; stirring system 400 includes main stirring shaft 401, first auxiliary stirring shaft 402, second auxiliary stirring shaft 403, third auxiliary stirring shaft 404, main propeller blade 405, first auxiliary propeller blade 406, second auxiliary propeller blade 407, third auxiliary propeller blade 408; flow system 500 includes inlet 501, outlet 502, grinding media ball inlet 503, and grinding door 504; support system 600 includes cylinder 601, gear mechanism and hydraulic system protective shell 602, and wear-resistant liner 603.

[0032] Further, the gear mechanism 103 includes a main gear 103-1, a first auxiliary gear 103-2, a second auxiliary gear 103-3, a third auxiliary gear 103-4, an internal gear ring 103-5, and a connecting rod 103-6. The main gear 103-1 can mesh with the first auxiliary gear 103-2, the second auxiliary gear 103-3, and the third auxiliary gear 103-4, which are equidistantly distributed in a circular pattern. Gear 103-4 can mesh with internal gear ring 103-5; at the same time, the upper surfaces of main gear 103-1 and internal gear ring 103-5 are provided with three threaded holes that are equidistantly distributed in a circle, and the connecting rod 103-6 is provided with threaded holes of the same distance and diameter. Each connecting rod 103-6 is connected to the main gear 103-1 and internal gear ring 103-5 in sequence by bolt thread connection, so that the main gear 103-1 and internal gear ring 103-5 rotate at the same angular velocity.

[0033] Furthermore, the hydraulic system 200's hydraulic lines 204 sequentially connect the lower parts of four equidistantly distributed hydraulic cylinders 201. Each hydraulic cylinder 201 has a hydraulic piston rod 202 nested in its upper part and is subject to limiting treatment. A rotatable ball bearing 203 is embedded in the top of the hydraulic piston rod 202. The rotatable ball bearing 203 makes point-to-surface contact with the internal gear ring 103-5 of the gear mechanism 103 to reduce frictional wear caused by contact during rotation. The hydraulic system 200 controls the increase and decrease of the flow rate in the hydraulic lines 204 to control the lifting and lowering of the hydraulic piston rod 202, thereby realizing the rising and falling of the main gear 103-1 and the internal gear ring 103-5 fixed in the gear mechanism 103. Both the main gear 103-1 and the internal gear ring 103-5 can serve as driving gears. The first auxiliary gear 103-2, the second auxiliary gear 103-3, and the third auxiliary gear 103-... 4 is the driven gear. When the hydraulic piston column 202 of the hydraulic system 200 is in the lifting state, the main gear 103-1 meshes with the first auxiliary gear 103-2, the second auxiliary gear 103-3, and the third auxiliary gear 103-4. When the main gear 103-1 rotates clockwise, the first auxiliary gear 103-2, the second auxiliary gear 103-3, and the third auxiliary gear 103-4 rotate counterclockwise. When the hydraulic piston column 202 is in the retracted state, the internal gear ring 103-5 meshes with the first auxiliary gear 103-2, the second auxiliary gear 103-3, and the third auxiliary gear 103-4. When the internal gear ring 103-5 rotates clockwise, the first auxiliary gear 103-2, the second auxiliary gear 103-3, and the third auxiliary gear 103-4 also rotate clockwise. Through the action of the hydraulic system 200, the driven gear of the gear mechanism 103 has two operating states of rotation direction.

[0034] Furthermore, the first layer anti-deviation bracket 301 and the second layer anti-deviation bracket 302 on the top of the cylinder of the vibration damping and anti-deviation system 300 are provided with circular through holes corresponding to the center positions of the main gear 103-1 and the three auxiliary gears. The main drive connecting shaft 303, the first auxiliary drive connecting shaft 304, the second auxiliary drive connecting shaft 305, and the third auxiliary drive connecting shaft 306 are all clearance-fitted with the circular through holes on the first layer anti-deviation bracket 301 on the top of the cylinder and the corresponding circular through holes of the gears to reduce certain vibrations caused by the gear transmission process. Each drive connecting shaft has a journal slightly larger than the diameter of the circular through hole on the anti-deviation bracket to position the drive connecting shaft and provide support. Each drive connecting shaft is provided with a keyway and connected to the corresponding gear through a key.

[0035] Furthermore, the first anti-deviation support 301 and the second anti-deviation support 302 on the top of the cylinder of the vibration damping and anti-deviation system 300 are both fixed to the protruding bosses on the inner wall of the cylinder 601 by welding. The cylinder 601 of the support system 600 is composed of three groups of steel plates, each group including four different shapes, connected by welding. The bottom of the cylinder 601 corresponding to the cylinder wall is rounded to facilitate the gathering of grinding media and slurry towards the middle of the cylinder. Wear-resistant liners 603 corresponding to the steel plates of each shape are fixedly connected to the inner wall of the cylinder by welding. On this basis, two steel plates of one group on the cylinder wall are opened into grinding doors 504 and connected by hinges for equipment inspection and maintenance.

[0036] Furthermore, the main stirring shaft 401, the first auxiliary stirring shaft 402, the second auxiliary stirring shaft 403, and the third auxiliary stirring shaft 404 of the stirring system 400 are fitted with corresponding circular through holes in the second layer of anti-deviation support 302 at the top of the cylinder to reduce vibrations caused by the transmission shaft and the stirring shaft stirring the grinding media and slurry. The shaft sections in contact with the main stirring shaft 401 and the main transmission shaft 303, the first auxiliary stirring shaft 402 and the first auxiliary transmission shaft 304, the second auxiliary stirring shaft 403 and the second auxiliary transmission shaft 305, and the third auxiliary stirring shaft 404 and the third auxiliary transmission shaft 306 are all machined with external threads. The inner rings of the main transmission connecting flange 307, the first auxiliary transmission connecting flange 308, the second auxiliary transmission connecting flange 309, and the third auxiliary transmission connecting flange 310 of the vibration reduction and anti-deviation system are also machined with internal threads that can mate with the external threads of the shaft. Each stirring shaft and the transmission connecting shaft are threadedly connected to the transmission connecting flange to ensure the stability of the transmission.

[0037] Furthermore, a main propeller blade 405 is welded to the main stirring shaft 401, a first auxiliary propeller blade 406 is welded to the first auxiliary stirring shaft 402, a second auxiliary propeller blade 407 is welded to the second auxiliary stirring shaft 403, and a third auxiliary propeller blade 408 is welded to the third auxiliary stirring shaft 404. The distance between the edge of the main propeller blade 405 and the edges of the other three auxiliary propeller blades is s1, and the distance between the edge of the auxiliary propeller blade and the wear-resistant liner 603 on the inner wall of the cylinder 601 is s2. The diameter of the grinding media balls filled inside the vertical multi-shaft variable direction spiral stirring mill system is d. The distance s1 is required to satisfy d < s1 < 2d, and the distance s2 is required to satisfy d < s2 < 1.2d to prevent the grinding media balls from getting stuck.

[0038] Furthermore, the gear mechanism and hydraulic system protective housing 602 of the support system 600 have stepped circular holes on their upper surface. A cylindrical roller bearing 102 is installed in the larger diameter circular hole, with the outer ring of the bearing interference fit with the circular hole and the inner ring of the bearing interference fit with the main drive shaft. The smaller diameter circular hole is used for the extension of the main drive shaft 303. The output shaft of the motor 101 of the drive system 100 is connected to the main drive shaft 303 through a coupling. A circular steel plate is welded to the bottom of the gear mechanism and hydraulic system protective housing 602 to fix and support the hydraulic cylinder 201 of the hydraulic system 200. A circular through hole is opened on the side wall of the gear mechanism and hydraulic system protective housing 602 for the connection of hydraulic pipelines.

[0039] Furthermore, the feed inlet 501, discharge outlet 502, and grinding media inlet 503 of the circulation system 500 are all cylindrical pipes with a certain diameter opened on the wall of the cylinder 601. The feed inlet 501 is a cylindrical pipe opened near the bottom of the cylinder 601 close to the main stirring shaft 401, and the discharge outlet 502 is a cylindrical pipe opened near the top of the cylinder 601 close to the third auxiliary stirring shaft 404, so as to realize the entry and exit of slurry. The grinding media ball inlet 503 is a circular slot opened at a certain inclined angle near the top of the cylinder 601 close to the main stirring shaft 401, so as to realize the input of grinding media balls. The feed inlet 501, discharge outlet 502, and grinding media inlet 503 are all on the same vertical plane.

[0040] The working process of this invention is as follows: At the work site, the cylinder 601 is first installed and fixed. Grinding media balls are filled into the cylinder 601 through the grinding media ball inlet 503, with most concentrated in the middle of the cylinder 601. Then, slurry is input through the feed inlet 501. The motor 101 is started, and the hydraulic piston column 202 of the hydraulic system 200 is first placed in the lifting (pressurizing) state, causing the main gear 103-1 to mesh with the other three auxiliary gears and drive the stirring system 400 to operate. This working state is the grinding state. In this state, the main stirring shaft 401 rotates clockwise, causing the main propeller blades 405 to drive the media balls and slurry near the bottom of the cylinder 601 in a spiral upward motion. The other three auxiliary stirring shafts... The counterclockwise rotation causes the secondary propeller blades to drive the media balls near the top of the cylinder 601 and the slurry in a spiral downward motion to achieve an accelerated grinding cycle. After working for a period of time, the particle size in the slurry gradually decreases to meet the grinding particle size requirements. The hydraulic piston column 202 of the hydraulic system 200 is placed in the retracted (unpressurized) state, so that the internal gear ring 103-5 meshes with the other three secondary gears to perform operations. This working state is the discharge state. In this state, the main stirring shaft 401 and the other three secondary stirring shafts rotate clockwise, causing the fine particles in the slurry to flow out of the discharge port 502 at an accelerated speed. During the operation, as the media balls wear down, new media balls can be added through the grinding media ball inlet 503.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vertical multi-shaft variable-direction spiral stirring mill system, characterized in that, It includes a drive system, a hydraulic system, a vibration damping and anti-deviation system, a mixing system, a circulation system, and a support system. The drive system includes a motor, cylindrical roller bearings, and a gear mechanism. The hydraulic system includes a hydraulic cylinder, a hydraulic piston, rotatable balls, and hydraulic lines. The vibration damping and anti-deviation system includes a first-layer anti-deviation support bracket at the top of the cylinder, a second-layer anti-deviation support bracket at the top of the cylinder, a main drive connecting shaft, a first auxiliary drive connecting shaft, a second auxiliary drive connecting shaft, a third auxiliary drive connecting shaft, a main drive connecting flange, a first auxiliary drive connecting flange, a second auxiliary drive connecting flange, and a third auxiliary drive connecting flange. The mixing system includes a main mixing shaft, a first auxiliary mixing shaft, a second auxiliary mixing shaft, a third auxiliary mixing shaft, main propeller blades, a first auxiliary propeller blade, a second auxiliary propeller blade, and a third auxiliary propeller blade. The circulation system includes an inlet, an outlet, a grinding media ball inlet, and a grinding door. The support system includes the cylinder body, a gear mechanism, a protective shell for the hydraulic system, and wear-resistant liners. The hydraulic system's hydraulic lines sequentially connect the lower parts of four equidistantly distributed hydraulic cylinders. Each hydraulic cylinder has a hydraulic piston rod nested in its upper part and is limited in position. A rotatable ball is embedded in the top of the hydraulic piston rod. The rotatable ball makes point-to-surface contact with the internal gear ring of the gear mechanism to reduce friction and wear caused by contact during rotation. The hydraulic system controls the increase and decrease of the flow rate in the hydraulic lines to control the raising and lowering of the hydraulic piston rod, thereby realizing the raising and lowering of the main gear and the internal gear ring fixed in the gear mechanism. Both the main gear and the internal gear ring can be used as driving gears, and the first, second, and third auxiliary gears are driven gears. That is, when the hydraulic piston rod of the hydraulic system is in the lifting state, the main gear meshes with the first, second, and third auxiliary gears. When the main gear rotates clockwise, the first, second, and third auxiliary gears rotate counterclockwise. When the hydraulic piston is in the retracted state, the internal gear ring meshes with the first, second, and third auxiliary gears. When the internal gear ring rotates clockwise, the first, second, and third auxiliary gears also rotate clockwise. Through the action of the hydraulic system, the driven gear of the gear mechanism can have two operating states of rotation direction. The vibration damping and anti-deviation system has circular through holes on the first and second anti-deviation brackets at the top of the cylinder, corresponding to the center positions of the main gear and the three auxiliary gears. The main drive connecting shaft, the first auxiliary drive connecting shaft, the second auxiliary drive connecting shaft, and the third auxiliary drive connecting shaft are all clearance-fitted with the circular through holes on the first anti-deviation bracket at the top of the cylinder and the corresponding circular through holes of the gears to reduce some vibration caused by the gear transmission process. Each drive connecting shaft has a journal slightly larger than the diameter of the circular through hole on the anti-deviation bracket to position the drive connecting shaft and provide support. Each drive connecting shaft has a keyway and is connected to the corresponding gear through a key.

2. The vertical multi-axis variable-direction spiral stirring mill system according to claim 1, characterized in that, The gear mechanism includes a main gear, a first auxiliary gear, a second auxiliary gear, a third auxiliary gear, an internal gear ring, and a connecting rod. The main gear can mesh with the first auxiliary gear, the second auxiliary gear, and the third auxiliary gear, which are equidistantly distributed in a circle. The first auxiliary gear, the second auxiliary gear, and the third auxiliary gear can also mesh with the internal gear ring. At the same time, the main gear and the internal gear ring each have three threaded holes equidistantly distributed in a circle on their upper surfaces. The connecting rod has threaded holes of the same distance and diameter as the main gear. Each connecting rod is connected to the main gear and the internal gear ring in sequence by bolt threads, so that the main gear and the internal gear ring rotate at the same angular velocity.

3. The vertical multi-axis variable-direction spiral stirring mill system according to claim 1, characterized in that, The first and second anti-deviation supports on the top of the cylinder of the vibration damping and anti-deviation system are fixed to the protruding platforms on the inner wall of the cylinder by welding. The cylinder of the support system is composed of three groups of steel plates, each group including four different shapes, connected by welding. The bottom of the cylinder and the connection between the cylinder and the cylinder wall corresponding to the three auxiliary connecting drive shafts are rounded to facilitate the gathering of grinding media and slurry towards the middle of the cylinder. Wear-resistant liners corresponding to the steel plates of each shape are fixedly connected to the inner wall of the cylinder by welding. On this basis, two steel plates of one group on the cylinder wall are opened into grinding doors and connected by hinges for equipment inspection and maintenance.

4. A vertical multi-axis variable-direction spiral stirring mill system according to claim 1, characterized in that, The main stirring shaft, first auxiliary stirring shaft, second auxiliary stirring shaft, and third auxiliary stirring shaft of the stirring system are fitted with corresponding circular through holes in the second layer of anti-deviation support on the top of the cylinder to reduce vibration caused by the transmission shaft and the stirring shaft stirring the grinding media and slurry. The shaft sections in contact with the main stirring shaft and the main transmission shaft, the first auxiliary stirring shaft and the first auxiliary transmission shaft, the second auxiliary stirring shaft and the second auxiliary transmission shaft, and the third auxiliary stirring shaft and the third auxiliary transmission shaft are all machined with external threads. The inner rings of the main transmission flange, the first auxiliary transmission flange, the second auxiliary transmission flange, and the third auxiliary transmission flange of the vibration reduction and anti-deviation system are also machined with internal threads that can mate with the external threads of the shaft. Each stirring shaft and the transmission shaft are threadedly connected to the transmission flange to ensure the stability of the transmission.

5. A vertical multi-axis variable-direction spiral stirring mill system according to claim 4, characterized in that, The main stirring shaft is welded with a main propeller blade, the first auxiliary stirring shaft is welded with a first auxiliary propeller blade, the second auxiliary stirring shaft is welded with a second auxiliary propeller blade, and the third auxiliary stirring shaft is welded with a third auxiliary propeller blade. The distance between the edge of the main propeller blade and the edges of the other three auxiliary propeller blades is... s 1. The distance from the edge of the auxiliary propeller blade to the wear-resistant liner on the inner wall of the cylinder is... s 2. The diameter of the grinding media balls filling the vertical multi-axis variable direction spiral stirred mill system is... d Required distance s 1. Satisfy d < s 1 < 2 d ,distance s 2. Satisfy d < s 2 < 1.2 d This is to prevent the grinding media balls from getting stuck.

6. A vertical multi-axis variable-direction spiral stirring mill system according to claim 1, characterized in that, The upper surface of the protective housing for the gear mechanism and hydraulic system of the support system has stepped circular holes. A cylindrical roller bearing is installed in the larger diameter circular hole, with the outer ring of the bearing interference fit with the circular hole and the inner ring of the bearing interference fit with the main drive shaft. The smaller diameter circular hole is used for the extension of the main drive shaft. The output shaft of the motor of the drive system is connected to the main drive shaft through a coupling. A circular steel plate is welded to the bottom of the protective housing for the gear mechanism and hydraulic system to fix the hydraulic cylinder body supporting the hydraulic system. Circular through holes are opened on the side wall of the protective housing for the connection of hydraulic pipelines.

7. A vertical multi-axis variable-direction spiral stirring mill system according to claim 1, characterized in that, The feed inlet, discharge outlet, and grinding media inlet of the circulation system are all cylindrical pipes with a certain diameter opened on the cylinder wall. The feed inlet is a cylindrical pipe opened near the bottom of the cylinder close to the main stirring shaft, and the discharge outlet is a cylindrical pipe opened near the top of the cylinder close to the third auxiliary stirring shaft to realize the entry and exit of slurry. The grinding media ball inlet is a circular slot opened at a certain angle near the top of the cylinder close to the main stirring shaft to realize the entry of grinding media balls. The feed inlet, discharge outlet, and grinding media inlet are all on the same vertical plane.

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