Ore crushing device with screening function

Abstract

The invention belongs to the technical field of ore crushing, and discloses an ore crushing device with a screening function, comprising a rack, a mounting ring rotationally connected to the rack, a mounting frame fixed at the bottom of the mounting ring, and a screening tank arranged at the top of the mounting ring; a crushing assembly is arranged in an inner cavity of the screening tank and suspended in the screening tank through an elastic suspension mechanism. The guide frame with the V-shaped or arc-shaped section is arranged on the outer side of the screening hole, and the opening of the guide frame faces the ore rotating direction, so that all materials trying to penetrate through the screening hole are forced to firstly impact the inner wall of the guide frame at a high speed; according to the utility model, a narrow bending channel is arranged in the crushing cavity, so that strip-shaped or sheet-shaped unqualified materials can not pass through the narrow bending channel and can be rebounded back to the crushing cavity for secondary crushing, the occurrence path of a drilling effect is physically cut off, and the discharged materials are ensured to be regular in particle shape, so that the screening precision stability of the equipment under long-term operation is ensured, and the maintenance period is greatly prolonged.

Description

Technical Field

[0001] This invention belongs to the field of ore crushing technology, specifically an ore crushing device with screening function. Background Technology

[0002] In the mining and metallurgical industries, ore crushing and grading are crucial preliminary steps in the mineral processing flow. Existing ore processing technologies typically employ jaw crushers, cone crushers, or impact crushers to initially crush large pieces of ore. Subsequently, the material is transported via belt conveyors to independent vibrating screens for particle size classification. While this segmented processing method is technologically mature, it requires a large equipment footprint, involves a complex process, and the flow of material between different devices increases the risk of energy consumption and dust pollution. Furthermore, traditional crushing equipment often has rigid internal structures, lacking the ability to adapt to ores of different hardness. Often, the only way to change crushing parameters is by replacing parts or shutting down the machine for adjustments.

[0003] However, existing technologies have significant problems in practical applications, namely, poor matching between crushing force and ore characteristics. Traditional eccentric vibratory crushers derive their excitation force from eccentric blocks with fixed mass and fixed eccentricity. Once the equipment leaves the factory or is installed and commissioned, the eccentricity is locked. When the hardness of the feed ore fluctuates greatly, the fixed excitation force may be insufficient for effective crushing of high-hardness ores, leading to equipment jamming or low efficiency. Conversely, when processing softer ores, excessive excitation force can cause unnecessary energy waste and excessive equipment wear. Although some equipment can reduce crushing force by lowering the rotation speed using a frequency converter, this directly leads to a decrease in crushing frequency, thereby significantly reducing output and making it impossible to achieve flexible force adjustment while maintaining high-frequency crushing.

[0004] Another pressing issue is the poor integration of crushing and screening, particularly the low interception efficiency for needle-shaped and flaky materials. In conventional screening and crushing structures, materials often directly impact the screen, and long strips or flaky substandard ores easily pass through the screen holes through the "drilling effect," resulting in substandard product particle shape and affecting the efficiency of subsequent grinding or smelting. At the same time, existing screening structures lack secondary crushing functions, and once materials clog the screen holes, cleaning is extremely difficult, usually requiring shutdown and disassembly, which seriously affects the continuity of production. Summary of the Invention

[0005] The purpose of this invention is to provide an ore crushing device with screening function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ore crushing device with screening function, comprising a frame, a mounting ring rotatably connected to the frame, a mounting bracket fixed to the bottom of the mounting ring, and a screening tank disposed on the top of the mounting ring;

[0007] The screening tank is equipped with a crushing component inside its cavity. The crushing component is suspended inside the screening tank by an elastic suspension mechanism, and a screening channel is formed between the outer wall of the crushing component and the inner wall of the screening tank.

[0008] The mounting frame is equipped with a drive and eccentric adjustment mechanism. The output end of the drive and eccentric adjustment mechanism extends upward and is fixedly connected to the bottom of the crushing component through a power transmission frame.

[0009] The drive and eccentric adjustment mechanism is used to generate eccentric excitation force to drive the crushing component to perform high-frequency oscillating motion relative to the screening tank, so as to simultaneously realize the crushing and screening of ore.

[0010] As a further technical solution of the present invention, the elastic suspension mechanism includes buffer frames respectively disposed at the top and bottom of the crushing component, and elastic telescopic rods distributed in a circumferential array on the outside of the buffer frames, wherein the end of the elastic telescopic rod away from the buffer frame abuts against the inner wall of the screening tank.

[0011] The drive and eccentric adjustment mechanism includes a motor, a reducer connected to the output end of the motor, and an eccentric adjustment component driven to rotate by the reducer. The top end of the eccentric adjustment component is connected to the power transmission frame.

[0012] As a further technical solution of the present invention, the crushing component includes a crushing tank and a crushing shaft arranged coaxially, and the crushing shaft is fixed at the axial center of the crushing tank;

[0013] The side wall of the crushing tank is provided with a number of screening holes in an array, and crushing rods and crushing nails are alternately arranged along the axial direction on the outer circumferential surface of the crushing shaft.

[0014] The inner wall of the crushing tank is provided with a guide frame corresponding to the position of the screening hole. The guide frame is located radially inside the screening hole and is used to prevent material from passing directly through the screening hole radially.

[0015] As a further technical solution of the present invention, the cross-section of the guide frame is V-shaped or arc-shaped, and the opening direction of the guide frame faces the rotating flow direction of the ore, so that the ore needs to detour through the guide groove on the outside of the guide frame to enter the screening hole.

[0016] As a further technical solution of the present invention, the eccentric adjustment component includes a hollow drive shaft, an electric push rod is coaxially slidably disposed inside the hollow drive shaft, and an extrusion block is connected to the output end of the electric push rod;

[0017] The upper side wall of the hollow drive shaft is provided with a slot, and a wedge block is movably installed in the slot. The pressing block and the wedge block are engaged by an inclined surface to convert the axial movement of the electric push rod into the radial movement of the wedge block.

[0018] As a further technical solution of the present invention, a timing frame is fixed at the top of the hollow transmission shaft, a rotor block is connected on the timing frame, and an adjustment groove is formed radially inside the rotor block;

[0019] An adjusting block is slidably installed in the adjusting groove. One end of the adjusting block is connected to the eccentric block, and the other end is connected to the wedge block.

[0020] The electric push rod drives the wedge block to move radially, thereby causing the adjusting block and the eccentric block to change the eccentricity.

[0021] As a further technical solution of the present invention, the screening tank has an inlet at the top center and a discharge port on the lower side wall of the screening tank, and a discharge cover plate for controlling the discharge of materials is provided at the discharge port.

[0022] As a further technical solution of the present invention, a locking member is provided at the connection between the frame and the mounting ring, and rotating shafts are provided on both sides of the mounting ring;

[0023] When the locking element is unlocked, the mounting ring can cause the screening tank, the mounting frame, and the crushing assembly to rotate around the rotating shaft relative to the frame, so as to dump the residual waste material in the crushing assembly.

[0024] As a further technical solution of the present invention, the crushing rod and the crushing nail are made of high manganese steel, and the inner wall of the screening hole is covered with a tungsten carbide wear-resistant coating.

[0025] As a further technical solution of the present invention, the guide slope of the extrusion block is set at an angle between 10 degrees and 15 degrees, and the self-locking characteristic is used to maintain the positional stability of the eccentric block in the power-off state.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention features a V-shaped or arc-shaped guide frame on the outside of the screening holes, with its opening facing the direction of ore rotation. This forces all materials attempting to pass through the screen holes to first impact the inner wall of the guide frame at high speed. This causes long strips or flakes of unqualified materials to bounce back into the crushing chamber for secondary crushing because they cannot pass through the narrow bending channel. This physically cuts off the path of the drilling effect, ensuring that the discharged material has a regular particle shape, thus guaranteeing the stability of the screening accuracy of the equipment during long-term operation and significantly extending the maintenance cycle.

[0028] 2. This invention utilizes a built-in electric push rod to displace a wedge block, thereby driving the eccentric block to move radially and changing the eccentricity. When encountering high-hardness ores, the system can increase the eccentricity, linearly multiplying the excitation force without changing the motor speed, thus obtaining sufficient impact energy to crush hard rock and preventing equipment jamming. When processing soft ores, reducing the eccentricity can significantly reduce ineffective energy consumption and mechanical wear. Through a constant high-frequency, variable-force crushing mode, it ensures that the crushing output does not decrease due to the reduction in speed and achieves optimal control of the energy efficiency ratio, solving the efficiency loss problem caused by traditional speed regulation.

[0029] 3. This invention monitors the motor current in real time. Once an abnormal increase in current is detected, the eccentricity is automatically increased to the maximum value. The strong excitation force generated in an instant disperses blockages or crushes hard cores, achieving automatic unblocking without the need for manual shutdown. In addition, for waste materials such as iron blocks that are difficult to handle in the crushing tank, this invention adopts a rotatable connection design between the mounting ring and the frame. The operator only needs to loosen the locking bolts to flip the entire screening tank like pouring out a bucket of water, and use gravity to quickly pour out the waste material. This replaces the cumbersome process of disassembling and cleaning the traditional equipment, reduces cleaning time, significantly reduces labor intensity, and ensures the efficient and continuous operation of the production line. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the bottom structure of the present invention;

[0032] Figure 3 This is an exploded view of the mounting frame and screening tank structure of the present invention;

[0033] Figure 4 This is a schematic diagram showing the cooperation between the motor, the eccentric adjustment component, and the power transmission frame structure of the present invention.

[0034] Figure 5 This is a partial cross-sectional schematic diagram of the eccentric adjustment component structure of the present invention;

[0035] Figure 6 This is a partial schematic diagram of the eccentric adjustment component of the present invention;

[0036] Figure 7 This is a cross-sectional schematic diagram of the internal structure of the screening tank of the present invention;

[0037] Figure 8 This is a partial cross-sectional view of the structure of the crushing component of the present invention.

[0038] In the diagram: 1. Frame; 2. Mounting ring; 3. Mounting bracket; 4. Motor; 5. Reducer; 6. Eccentric adjustment assembly; 601. Hollow drive shaft; 602. Synchronizing frame; 603. Rotor block; 604. Slot; 605. Adjusting slot; 606. Adjusting block; 607. Eccentric block; 608. Electric push rod; 609. Extrusion block; 6010. Wedge block; 7. Screening tank; 8. Feed inlet; 9. Discharge outlet; 10. Discharge cover plate; 11. Crushing assembly; 111. Crushing shaft; 112. Crushing rod; 113. Crushing nail; 114. Crushing tank; 115. Screening hole; 116. Guide frame; 12. Buffer frame; 13. Elastic telescopic rod; 14. Power transmission frame. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 8 As shown, this embodiment of the invention provides an ore crushing device with screening function, mainly including a screening tank 7 set at the top and a mounting frame 3 installed below the screening tank 7. In order to provide effective support for the screening tank 7 and facilitate the internal discharge of waste materials, the device has a mounting ring 2 installed on the outer side of the screening tank 7 near the bottom end, and the outer side of the mounting ring 2 is movably connected to the frame 1, wherein the mounting ring 2 can rotate relative to the frame 1.

[0041] To improve stability during crushing, the connection between the frame 1 and the mounting ring 2 is locked with bolts. During normal operation, the mounting ring 2 and the frame 1 are locked, and the mounting ring 2 cannot rotate relative to the frame 1. When it is necessary to discharge waste, the bolts can be released, allowing the mounting ring 2 to rotate relative to the frame 1, thereby turning the screening tank 7 over to discharge the internal waste.

[0042] In order to effectively feed ore and discharge ore after screening, a feed inlet 8 is provided at the top of the screening tank 7, and a discharge outlet 9 is provided on both sides of the bottom of the screening tank 7 near the outer side. The feed inlet 8 is used to feed the ore to be crushed, while the discharge outlet 9 at the bottom is used to discharge the crushed and screened ore.

[0043] To prevent the ore from being discharged before it is fully screened, a discharge cover plate 10 is installed at the bottom of the discharge port 9. Under normal conditions, the discharge cover plate 10 can block the discharge port 9 and prevent the ore from being discharged. When necessary, the discharge cover plate 10 can be removed to complete the discharge process of the ore after screening.

[0044] In order to achieve simultaneous crushing and screening, the device also has a crushing component 11 in the middle of the inner cavity of the screening tank 7. In order to achieve vibratory screening, the crushing component 11 is not installed inside the screening tank 7 in the traditional way of movable sleeve or fixed, but is installed inside the screening tank 7 in the way of elastic suspension.

[0045] Specifically, buffer frames 12 are installed at the middle of both the upper and lower ends of the crushing assembly 11, and elastic telescopic rods 13 are installed axially at equal intervals on the outer side of the buffer frame 12. The other end of the elastic telescopic rod 13 is connected to the inner wall of the screening tank 7. The elastic telescopic rod 13 has a built-in spring that can provide elastic deformation, so that the crushing assembly 11 can swing relative to the screening tank 7.

[0046] In order to provide power for the crushing and screening of the device, a motor 4 is also installed on the inner bottom wall of the mounting frame 3. A reducer 5 is installed at the output end of the motor 4, and an eccentric adjustment component 6 is installed at the output end of the reducer 5. A power transmission frame 14 is installed at the top of the eccentric adjustment component 6, and the top of the power transmission frame 14 is fixedly connected to the bottom of the crushing component 11.

[0047] Specifically, the eccentric adjustment assembly 6 includes a hollow drive shaft 601. The bottom end of the hollow drive shaft 601 is connected to the output end of the reducer 5 via a universal coupling (or a drum gear coupling), allowing the hollow drive shaft 601 to rotate with the reducer and simultaneously engage with the crushing assembly 11 to perform a certain angle of yaw motion. The hollow drive shaft 601 can rotate with the output end of the reducer 5. At the same time, a synchronous frame 602 is installed at the end of the hollow drive shaft 601 away from the reducer 5. A rotor block 603 is installed at the end of the synchronous frame 602 away from the hollow drive shaft 601, and the end of the rotor block 603 away from the synchronous frame 602 is connected to the power transmission frame 14.

[0048] At the same time, the connection between the power transmission frame 14 and the crushing component 11, or the support structure of the hollow drive shaft 601, must allow for the deflection of the axis.

[0049] The crushing assembly 11 includes a crushing shaft 111 and a crushing tank 114. The crushing shaft 111 is fixedly installed in the middle of the inner cavity of the crushing tank 114. The outer side of the crushing shaft 111 is provided with a screening hole 115 in a circumferential shape. The diameter of the screening hole 115 is not limited to the size shown in the schematic diagram and can be adjusted according to actual needs.

[0050] To improve the crushing effect, crushing rods 112 are fixedly installed on the outer side of the crushing shaft 111 at equal intervals along the axis. At the same time, crushing nails 113 are also installed on the outer side of the crushing shaft 111 and between every two crushing rods 112.

[0051] To improve the screening effect, a guide frame 116 is installed on the inner wall of the crushing tank 114. The guide frame 116 corresponds to the screening holes 115. Specifically, the guide frame 116 can block the front of the vertically arranged screening holes 115, preventing the ore from being discharged directly from the front of the screening holes 115. Instead, it can only be discharged from the side of the screening holes 115 and around the guide frame 116, thereby increasing the residence time of the ore inside the crushing tank 114 and improving the screening effect.

[0052] The guide frame 116 not only serves as a barrier, but its cross-section is preferably designed in a 'V' shape or an arc shape, with the opening facing the direction of the incoming flow of rotating ore. This design forms a labyrinthine flow channel between the crushing tank 114 and the screening tank 7. When material smaller than the screen aperture passes through the screening hole 115, it will impact the concave surface of the guide frame 116 at high speed. Due to the instantaneous release of kinetic energy, the material undergoes secondary crushing or deagglomeration. Subsequently, under the rebound effect, the trajectory of the material changes, and it slides down along the guide groove of the guide frame, effectively preventing long strips or sheet-like unqualified ore from being accidentally discharged through the drilling effect.

[0053] Considering the high-intensity impact wear during ore crushing, the crushing rod 112 and crushing nail 113 are preferably cast from ZGMn13 (high manganese steel) and subjected to water toughening treatment to achieve a surface hardness of HB200-250. Under impact, due to work hardening effect, the surface hardness can be further increased to over HB500, thereby significantly extending the service life. In addition, the inner wall of the screening hole 115 is provided with a tungsten carbide wear-resistant coating with a coating thickness of 0.5mm-1mm to prevent the hard edges of the ore from rapidly wearing down the screen holes during high-speed centrifugal motion, thus reducing the screening accuracy.

[0054] Example: During normal ore crushing, the ore can be fed into the crushing tank 114 through the eccentric adjustment component 6, and the discharge cover plate 10 is kept blocking the bottom of the discharge port 9, so that the ore cannot be discharged temporarily. By turning on the motor 4 and reducing the speed through the reducer 5, the eccentric adjustment component 6 at the top is driven to rotate as a whole, and the power transmission frame 14 is driven to rotate. At this time, the power transmission frame 14 can drive the crushing tank 114 to rotate at high speed. At this time, the ore inside the crushing tank 114 can rotate and collide with the inner wall of the crushing tank 114, the crushing nails 113 and the crushing rods 112. The ore is crushed by continuous collision until the ore is crushed. The ore that meets the specifications is discharged from the side of the screening hole 115 and around the guide frame 116, and enters the screening tank 7. After all screening is completed, the ore that meets the specifications stays in the screening tank 7, while the ore that does not meet the specifications stays in the crushing tank 114.

[0055] At this point, the discharge cover plate 10 can be removed, and the screened ore can be discharged through the discharge port 9, completing the discharge process of the screened ore. At the same time, by flipping the screening tank 7, the non-compliant ore inside the crushing tank 114 can be poured out after the screening tank 7 is tilted, completing the crushing and screening process.

[0056] By utilizing the cooperation between the eccentric adjustment component 6 and the crushing component 11, and the cooperation between the crushing component 11 and the screening tank 7, the device can achieve screening while crushing. That is, by using the high-speed centrifugal process during crushing, the ore is impacted, achieving rapid crushing, and the ore can be rapidly screened through centrifugal action. The entire process can be completed simultaneously, that is, the crushing and screening processes are completed at the same time, achieving rapid crushing and grading of the ore, and significantly improving the crushing and screening efficiency.

[0057] To improve the ore crushing effect, an electric push rod 608 is installed inside the hollow drive shaft 601. A pressing block 609 located inside the hollow drive shaft 601 is installed at the output end of the electric push rod 608. A slot 604 is provided at the end of the hollow drive shaft 601 near the rotor block 603. A wedge block 6010 is movably engaged inside the slot 604, allowing the hollow drive shaft 601 to move relative to the slot 604. The pressing block 609 is installed at the output end of the electric push rod 608. The guide slope and the guide slope of the wedge block 6010 always maintain an abutting relationship. An adjusting block 606 is installed at the end of the wedge block 6010 away from the extrusion block 609. At the same time, an adjusting groove 605 is opened at the corresponding position of the rotor block 603. The adjusting block 606 is movably engaged with the adjusting groove 605. The adjusting block 606 can be displaced relative to the adjusting groove 605. An eccentric block 607 is installed at the end of the adjusting block 606 away from the wedge block 6010. In order to improve the counterweight effect, the eccentric block 607 is made of pure iron.

[0058] A conductive slip ring assembly is installed on the bottom exterior of the hollow drive shaft 601. The power line of the electric push rod 608 passes through the inner hole of the hollow drive shaft 601 and is connected to the rotor of the conductive slip ring assembly. The stator of the conductive slip ring assembly is connected to an external power source, thereby providing a stable power supply to the electric push rod 608 in the rotating state.

[0059] Specifically, with Figure 5 Taking the direction as an example, when the electric push rod 608 extends, the pressing block 609 moves towards the rotor block 603, which drives the wedge block 6010 to move downward along the direction of the slot 604, and simultaneously drives the eccentric block 607 to move along the direction of the adjustment slot 605, thus completing the eccentric adjustment.

[0060] Furthermore, to ensure that the electric push rod 608 can accurately and effortlessly push the eccentric block 607 to displacement, and to prevent the eccentric block 607 from pushing the wedge block 6010 in the opposite direction under the strong centrifugal force generated by high-speed rotation, thus preventing an unexpected change in the eccentricity, this embodiment optimizes the design of the contact slope angle between the wedge block 6010 and the extrusion block 609. Let the guide slope angle of the wedge block 6010 be... The axial thrust of the electric actuator 608 is The component of the centrifugal force acting on the eccentric block 607 and the connecting assembly along the direction of the adjusting groove 605 is: In order to not only achieve adjustment, but also have a certain self-locking holding capability in the event of power failure or in a stationary state, the tilt angle Set in Between these points, the change in eccentricity Extension and retraction of the electric linear actuator The following geometric relations must be satisfied:

[0061]

[0062] By setting the above formula, the control system can precisely control the step displacement of the electric push rod 608 to achieve control over the eccentricity. The fine-tuning of the levels allows for stepless adjustment of the crushing force, rather than the traditional gear-based adjustment.

[0063] Specifically, the crushing energy of this device comes from the excitation force generated by eccentric rotation. The crushing force F is related to the eccentric mass m and the rotational angular velocity. The eccentricity e is related as follows:

[0064]

[0065] In existing technologies, this is usually achieved by reducing the motor speed (reducing...) While methods to reduce crushing force to accommodate soft ores can lead to a decrease in crushing frequency and directly reduce output, this invention maintains the motor speed... The constant (maintaining high-frequency crushing) method adjusts the crushing force F by changing the eccentricity e. When the ore hardness is detected to be high, the value of e is increased, which makes the excitation force increase linearly. Thus, without reducing the crushing frequency, the ability to destroy high-hardness ores is significantly improved.

[0066] When the ore is relatively soft, reducing the e-value lowers equipment power consumption and mechanical wear, thus achieving optimal control of the energy efficiency ratio.

[0067] Example: When the ore is difficult to crush, the electric push rod 608 can be activated to extend it. At this time, the extrusion block 609 moves towards the rotor block 603 and moves away from the hollow drive shaft 601 by abutting against the drive wedge block 6010. Simultaneously, the eccentric block 607 moves to one side, thus completing the eccentric adjustment. As the eccentric adjustment component 6 continues to rotate, it provides eccentric rotation power to the crushing component 11. The crushing component 11 can then swing under the suspension of the elastic telescopic rod 13, increasing the amplitude of the crushing component 11. This increases the crushing force on the ore inside the crushing component 11, resulting in more thorough crushing. Conversely, the wedge block 6010 moves towards the center of the hollow drive shaft 601, reducing the corresponding crushing force and adapting it to different ore crushing requirements.

[0068] By utilizing the cooperation between the eccentric adjustment component 6 and the crushing component 11, the device can perform ordinary crushing while also adjusting the eccentricity through the eccentric adjustment component 6. This allows for dynamic adjustment of the crushing stroke without stopping the machine, i.e., changing the eccentricity. When encountering difficult-to-crush materials, the eccentricity is increased to increase the crushing force, while the eccentricity is decreased when encountering easily crushed materials to increase output. At the same time, the adjustable gyratory motion can also prevent ore from clogging the screen holes and reduce downtime.

[0069] In the operation of this device, there is also a set of adaptive adjustment logic based on load feedback (control module not shown):

[0070] 1. The system monitors the real-time operating current of motor 4. ;

[0071] 2. Preset the rated current threshold range for normal breakage [ , ];

[0072] 3. When monitored > If the duration exceeds the set value (e.g., 2 seconds), it is determined that there is difficult-to-crush ore or blockage inside the crushing tank 114;

[0073] 4. The control system immediately commands the electric push rod 608 to extend, driving the wedge block 6010 to shift, increasing the eccentricity, thereby outputting the maximum excitation force to break the blockage point;

[0074] 5. When the current drops back to the normal range, control the electric push rod 608 to reset and restore the normal crushing mode.

[0075] Working principle and usage process of this invention:

[0076] Before starting the equipment, the operator first confirms that the locking bolts between the frame 1 and the mounting ring 2 are locked to ensure that the screening tank 7 is vertically fixed and cannot be overturned. At this time, the discharge cover 10 is installed at the bottom of the discharge port 9 and is in a closed state to prevent the leakage of untreated materials. The ore to be crushed is fed into the device through the top feed port 8 and falls into the crushing tank 114 located in the middle of the inner cavity.

[0077] The motor 4 inside the mounting frame 3 is started. The output shaft of the motor 4 rotates at high speed. After the speed is reduced and the torque is increased by the reducer 5, it drives the eccentric adjustment component 6 above to rotate. The hollow transmission shaft 601 in the eccentric adjustment component 6 drives the eccentric block 607 to perform circular motion, generating a strong centrifugal excitation force. This excitation force is transmitted to the crushing component 11 through the power transmission frame 14. Since the crushing component 11 is elastically suspended inside the screening tank 7 through the buffer frame 12 and the elastic telescopic rod 13, under the action of the excitation force, the crushing tank 114 not only rotates around its own axis, but also performs a high-frequency conical oscillation motion relative to the screening tank 7.

[0078] Inside the crushing tank 114, the ore is subjected to the combined effects of centrifugal force and gyratory force, and is thrown against the tank wall. It collides violently with the crushing rod 112 and crushing nail 113 on the crushing shaft 111 and the inner wall of the crushing tank 114 at a high frequency, achieving primary crushing of the ore. The crushed material spreads in all directions, attempting to pass through the screening hole 115. At this time, the guide frame 116 set outside the screening hole 115 plays a role. Its V-shaped or arc-shaped structure blocks the straight flight path of the material, forcing the material to hit the concave surface of the guide frame 116. The qualified small particles decay their kinetic energy after impact and slide down along the guide channel into the interlayer between the screening tank 7 and the crushing tank 114. The unqualified large particles or long strips are rebounded back to the crushing area for secondary crushing until the particle size meets the standard.

[0079] During operation, the system monitors the current load of motor 4 in real time. If the current exceeds the set threshold due to the presence of hard-to-crush ore, the system commands the electric push rod 608 inside the hollow transmission shaft 601 to extend. The electric push rod 608 pushes the extrusion block 609 forward. The inclined surface of the extrusion block 609 forces the wedge block 6010 to move radially within the slot 604, thereby pushing the adjusting block 606 and the eccentric block 607 to move outward along the adjusting groove 605, increasing the eccentricity. The increase in eccentricity causes the excitation force to increase quadratically, thereby generating a larger crushing stroke, powerfully crushing hard ore or breaking up blockages. When the load returns to normal, the electric push rod 608 retracts, the eccentric block 607 resets, and low-power operation resumes.

[0080] After the crushing operation is completed, the ore that meets the specifications accumulates at the bottom of the screening tank 7. At this time, the discharge cover plate 10 is removed, and the qualified ore is automatically discharged through the discharge port 9. For the waste or ultra-hard impurities that cannot be crushed and remain inside the crushing tank 114, the operator releases the locking bolts between the frame 1 and the mounting ring 2, rotates the mounting ring 2, and drives the entire screening tank 7 to tilt and pour out the waste inside, thus completing the cleaning work.

Claims

1. An ore crushing device with screening function, characterized in that: Includes a frame (1), a mounting ring (2) rotatably connected to the frame (1), a mounting bracket (3) fixed to the bottom of the mounting ring (2), and a screening tank (7) disposed on the top of the mounting ring (2); The screening tank (7) is provided with a crushing component (11) in its inner cavity. The crushing component (11) is suspended inside the screening tank (7) by an elastic suspension mechanism, and a screening channel is formed between the outer wall of the crushing component (11) and the inner wall of the screening tank (7). The mounting frame (3) is provided with a drive and eccentric adjustment mechanism. The output end of the drive and eccentric adjustment mechanism extends upward and is fixedly connected to the bottom of the crushing component (11) through the power transmission frame (14). The drive and eccentric adjustment mechanism is used to generate eccentric excitation force to drive the crushing component (11) to perform high-frequency oscillating motion relative to the screening tank (7) so as to simultaneously realize the crushing and screening of ore.

2. The ore crushing device with screening function according to claim 1, characterized in that: The elastic suspension mechanism includes a buffer frame (12) respectively disposed at the top and bottom of the crushing component (11), and elastic telescopic rods (13) arranged in a circumferential array on the outside of the buffer frame (12). The end of the elastic telescopic rod (13) away from the buffer frame (12) abuts against the inner wall of the screening tank (7). The drive and eccentric adjustment mechanism includes a motor (4), a reducer (5) connected to the output end of the motor (4), and an eccentric adjustment component (6) driven to rotate by the reducer (5). The top of the eccentric adjustment component (6) is connected to the power transmission frame (14).

3. The ore crushing device with screening function according to claim 1, characterized in that: The crushing assembly (11) includes a crushing tank (114) and a crushing shaft (111) arranged coaxially, and the crushing shaft (111) is fixed at the axial center of the crushing tank (114); The side wall of the crushing tank (114) is provided with a plurality of screening holes (115) in an array, and the outer circumferential surface of the crushing shaft (111) is alternately provided with crushing rods (112) and crushing nails (113) along the axial direction. The inner wall of the crushing tank (114) is provided with a guide frame (116) corresponding to the position of the screening hole (115). The guide frame (116) is located on the radial inner side of the screening hole (115) and is used to prevent the material from passing directly through the screening hole (115) radially.

4. The ore crushing device with screening function according to claim 3, characterized in that: The cross-section of the guide frame (116) is V-shaped or arc-shaped, and the opening direction of the guide frame (116) faces the rotating flow direction of the ore, so that the ore needs to detour through the guide groove on the outside of the guide frame (116) to enter the screening hole (115).

5. The ore crushing device with screening function according to claim 2, characterized in that: The eccentric adjustment assembly (6) includes a hollow drive shaft (601), and an electric push rod (608) is coaxially slidably arranged inside the hollow drive shaft (601). The output end of the electric push rod (608) is connected to a pressing block (609). The upper sidewall of the hollow drive shaft (601) is provided with a slot (604), and a wedge block (6010) is movably installed in the slot (604). The pressing block (609) and the wedge block (6010) are engaged by an inclined surface to convert the axial movement of the electric push rod (608) into the radial movement of the wedge block (6010).

6. The ore crushing device with screening function according to claim 5, characterized in that: The top end of the hollow drive shaft (601) is fixed with a synchronous frame (602), and a rotor block (603) is connected to the synchronous frame (602). An adjustment groove (605) is provided radially inside the rotor block (603). An adjusting block (606) is slidably installed in the adjusting groove (605). One end of the adjusting block (606) is connected to the eccentric block (607), and the other end is connected to the wedge block (6010). The electric push rod (608) drives the wedge block (6010) to move radially, thereby causing the adjusting block (606) and the eccentric block (607) to change the eccentricity.

7. The ore crushing device with screening function according to claim 1, characterized in that: The screening tank (7) has an inlet (8) at the top center and a discharge port (9) on the lower side wall of the screening tank (7). A discharge cover (10) for controlling the discharge of materials is provided at the discharge port (9).

8. The ore crushing device with screening function according to claim 1, characterized in that: A locking element is provided at the connection between the frame (1) and the mounting ring (2), and a rotating shaft is provided on both sides of the mounting ring (2); When the locking element is unlocked, the mounting ring (2) can drive the screening tank (7), the mounting frame (3) and the crushing assembly (11) to rotate around the rotating shaft relative to the frame (1) to dump the residual waste in the crushing assembly (11).

9. The ore crushing device with screening function according to claim 3, characterized in that: The crushing rod (112) and the crushing nail (113) are made of high manganese steel, and the inner wall of the screening hole (115) is covered with a tungsten carbide wear-resistant coating.

10. The ore crushing device with screening function according to claim 5, characterized in that: The guide slope of the extrusion block (609) is set at an angle between 10 and 15 degrees, and the self-locking characteristic is used to maintain the positional stability of the eccentric block (607) in the power-off state.

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