A mineral grinding mill

Abstract

The present application relates to the technical field of mineral crushing, and discloses a mineral grinding machine, which comprises a shell, a crushing assembly and a grate plate component arranged on the shell, the grate plate component comprises a plurality of grate plate assemblies arranged at intervals along the circumference of the shell, a material falling gap is formed between adjacent grate plate assemblies, each grate plate assembly comprises a fixed part fixedly arranged on the shell and a movable part sliding in the fixed part along the radial direction of the shell, a crushing piece is slidably arranged on the outer side of the fixed part, and an abutting assembly is arranged between the crushing piece and the movable part, so that when the movable part slides towards the direction away from the center of the shell, the crushing piece slides towards the material falling gap; through the above structure, the grate plate component not only has a screening function, but also has an active cleaning function, so that the material falling gap can be cleaned in multiple directions without stopping the machine, serious blockage can be effectively prevented, and the continuous operation capacity and overall crushing efficiency of the mineral grinding machine are improved.

Description

Technical Field

[0001] This invention relates to the field of mineral crushing technology, specifically to a mineral grinding mill. Background Technology

[0002] In fields such as mineral geology research, metallurgical analysis, materials science, environmental monitoring, and industrial production quality control, the preparation of experimental samples is the first and crucial step in obtaining accurate analytical results. Its core requirement is to efficiently and without pollution process representative raw block samples into fine powder with uniform composition and particle size that meets the requirements of subsequent analysis. As a common intermediate crushing equipment, the hammer crusher uses high-speed rotating hammers to strike the sample fed into the chamber, crushing it into finer particles. Its advantages are a large crushing ratio, fast processing speed, and relatively simple structure.

[0003] Chinese patent document CN222919082U discloses a hammer crusher, belonging to the field of material crushing technology. Specifically, it includes a casing, a hammer assembly housed therein, and a screen plate. A clearing component is provided below the screen plate. The clearing component includes a number of clearing rods corresponding to the holes in the screen plate and a drive mechanism for controlling the insertion or disengagement of the clearing rods from the screen plate holes. Multiple clearing rods are fixed together on a movable base. The drive mechanism controls the insertion or disengagement of the clearing rods from the screen plate holes by raising or lowering the movable base. The drive mechanism includes a fixed base and a lifting component. The movable base is slidably connected to the fixed base to fix its running direction. This technical solution, by setting a clearing component inside the casing, allows the clearing rods to push out the crushed stones from the screen plate holes when the holes are blocked, even when the machine is stopped. This technical solution clears the blockage in the screen plate holes without removing the screen plate itself.

[0004] In the above technical solution, when the screen plate is blocked, the unblocking component set below the screen plate moves upward to push the ore stuck between the screen plates upward, thereby solving the problem of screen plate blockage. However, when the crushing device crushes the ore, it does so by impacting the ore with the hammer. The ore blocking the screen plate mesh is not crushed and is pushed into the screen plate mesh by the hammer, which will cause the ore to get stuck in the screen plate mesh. If there is a lot of ore stuck in the screen plate mesh, it is difficult to push the ore out of the screen plate mesh by the unblocking component alone. Summary of the Invention

[0005] This invention provides a mineral grinding machine, which aims to solve the problem in related technologies where it is difficult to clean the screen mesh when it is severely clogged.

[0006] A mineral grinding mill includes: a housing, a crushing assembly, and a grate plate component disposed on the housing. The grate plate component includes a plurality of grate plate assemblies arranged at intervals along the circumference of the housing, with a material discharge gap formed between adjacent grate plate assemblies. Each grate plate assembly includes a fixed part fixedly disposed on the housing and a movable part sliding radially within the fixed part. A crushing component is slidably disposed on the outer side of the fixed part. An abutting assembly is installed between the crushing component and the movable part, so that when the movable part slides in a direction away from the center of the housing, the crushing component slides toward the material discharge gap. A locking member is disposed on the housing for locking the movable part onto the fixed part. A pushing member is rotatably disposed on the fixed part. A connecting assembly is installed between the pushing member and the movable part, so that when the movable part descends, it pushes the end of the pushing member to rotate toward the material discharge gap. A reset member is installed between the pushing member and the fixed part, so that after the connecting assembly loses the thrust of the movable part, the pushing member resets to a state parallel to the radial direction of the housing.

[0007] Its effect is as follows: During normal crushing operation of the mineral grinder, the locking component locks the movable part within the fixed part, and the grate assembly is in a stable screening state. The crushing component performs high-speed impact crushing on the ore, and the ore that meets the particle size requirements is discharged through the discharge gap. When the ore has high hardness or irregular shape, causing it to get stuck in the discharge gap, the locking component is released from the movable part, allowing it to slide radially along the shell under the impact force of the crushing component or the extrusion force of the ore. During the sliding process of the movable part, the abutment component drives the crushing component to move towards the discharge gap, laterally extruding and crushing the stuck ore. At the same time, during the descent of the movable part, the connecting component drives the pusher to rotate, pushing and clearing the ore below the discharge gap. After cleaning, the crushing component and the pusher automatically reset under the action of the reset component. Through the above structural design, the grate assembly not only has a screening function but also an active cleaning function, enabling multi-directional cleaning of the discharge gap without stopping the machine, effectively preventing serious blockage, and improving the continuous operation capability and overall crushing efficiency of the mineral grinder.

[0008] Preferably, the fixing part is a long strip-shaped block fixedly mounted on the housing. The fixing part has a mounting groove extending radially along the housing, with the opening of the mounting groove facing the center of the housing. The movable part is slidably mounted in the mounting groove. By specifically setting a mounting groove extending radially along the housing in the fixing part, this mounting groove can provide a stable and clear sliding guide for the movable part, allowing the movable part to move radially only strictly in a predetermined direction. This can effectively prevent the movable part from deviating during movement and will not cause jamming due to various factors, ensuring the stability and reliability of the movable part during movement. The movable part can move stably and reliably, thereby making the linkage action between the crushing part and the pushing part more accurate. This can significantly improve the overall reliability of the grate assembly and ensure that it can operate stably and efficiently under various working conditions.

[0009] Preferably, the movable part is a long strip-shaped slider that slides within the mounting groove. The top of the slider is inverted V-shaped to allow the crushing component and the movable part to crush the ore. The inverted V-shaped structure at the top of the movable part diverts and compresses the ore during its descent, causing it to move along both sides towards the material drop gap. Simultaneously, under the impact of the crushing component, the inverted V-shaped structure crushes the ore. This structure prevents ore from accumulating at the top of the movable part, improving the efficiency of ore movement towards the material drop gap, reducing impact load concentration, and extending the service life of the movable and fixed parts. The inverted V-shaped structure at the top of the movable part is optimized by adding an adjustable angle mechanism. This is achieved by installing two hinged inclined plates at the top of the movable part and fixing the angle range with bolts to accommodate different ore hardnesses. For example, for high-hardness iron ore, the angle is reduced to 60° to enhance the crushing effect; for soft ore, the angle is increased to 90° to improve diversion efficiency. Furthermore, a diamond coating is added to the surface of the crushing cone to improve wear resistance.

[0010] Preferably, the crushing component includes a crushing plate and a crushing cone. A receiving groove is provided on the side of the fixed part. The upper and lower sides of the crushing plate are respectively fitted against the upper and lower inner walls of the receiving groove, providing guidance for the sliding of the crushing plate. When the side of the crushing plate near the moving part is fully fitted with the receiving groove, the crushing component is completely located within the receiving groove to avoid affecting the ore falling out of the discharge gap. The crushing plate slides within the receiving groove through a precise guiding system, ensuring stability and accuracy during movement. In the non-working state, the crushing plate is completely retracted inside the receiving groove, thereby minimizing space occupation and avoiding interference with other components. When entering the working state, the abutment component is activated, applying force to extend the crushing plate from the receiving groove and directly into the discharge gap for efficient crushing of the ore. This design ensures that the crushing component only participates in operation when clearing blockages or handling special materials, avoiding problems such as poor discharge or equipment wear caused by prolonged extension. Simultaneously, this mechanism significantly improves the overall structural compactness, makes the equipment layout more rational, and enhances the stability and reliability of the discharge process, making it suitable for continuous production environments.

[0011] Preferably, a connecting block extending into the mounting groove is provided on the side of the crushing plate near the movable part. The abutting component includes an abutting block and an abutting cone. The abutting cone is fixedly disposed on the side of the connecting block near the mounting groove, and the abutting block is fixedly disposed on the movable part. The cone surface of the abutting cone faces the abutting block. Multiple abutting blocks are provided along the sliding direction of the movable part so that when the movable part slides away from the center of the housing, the abutting blocks can push the abutting cone out of the mounting groove multiple times, thereby crushing the ore in the material drop gap. During the sliding process of the movable part, multiple abutting blocks contact the abutting cone in sequence, converting the radial displacement of the movable part into multiple lateral reciprocating movements of the crushing plate, continuously crushing the ore in the material drop gap, realizing multiple crushing in one slide, and significantly enhancing the ability to clear stubborn stuck ore.

[0012] Preferably, a tension spring is installed between the crushed part and the fixed part so that the crushed part can reset after losing the thrust of the abutting component. After the crushed part loses the thrust of the abutting component, the tension spring applies a pull force to the crushed part, so that it automatically returns to the receiving groove. The reset of the crushed part can be achieved without additional drive, which is simple in structure and highly reliable.

[0013] Preferably, the pusher includes a rotating rod, a pusher rod, and a cone. The rotating rod is rotatably mounted on the fixed part, and multiple pusher rods are arranged along the length of the rotating rod. The fixed part has multiple clearance grooves corresponding to the pusher rods. The cone is fixedly mounted at the end of the pusher rod away from the rotating rod. During the rotation of the pusher, the pusher rod and cone structure inside it move accordingly, gradually extending out from the clearance grooves and acting on the ore pile below the material drop gap. Through the continuous advancement of the pusher rod and the guidance of the cone, a continuous pushing force can be applied to the accumulated ore, thereby clearing the ore below the material drop gap. This mechanism significantly reduces the risk of material accumulation in the gap, ensures the continuous and stable operation of the equipment, and improves the overall operating efficiency. At the same time, by setting the cone, when the pusher rod rotates into the material drop gap, it can crush the ore in the material drop gap. If the ore falls from the material drop gap after being crushed, the uncrushed ore pieces are pushed back into the shell and crushed again by the crushing component.

[0014] Preferably, the reset component is a torsion spring, with one end connected to the fixed part and the other end connected to the rotating rod. After the moving part stops applying force, the torsion spring applies a reset force to the rotating rod, causing the pusher to return to its initial position, ensuring automatic reset of the pusher after its action, and improving system stability.

[0015] Preferably, the connecting assembly includes an eccentric block and a base plate. The eccentric block is fixedly disposed on the side of the rotating rod near the movable part, and the base plate is fixedly disposed at the bottom of the movable part. The base plate abuts against the eccentric block so that the movable part pushes the rotating rod to rotate when it descends. When the movable part moves downward, the base plate at its bottom contacts the eccentric block and applies a thrust, causing the eccentric block to displace. This displacement is transmitted to the rotating rod through a mechanical connection, causing it to rotate. The rotation of the rotating rod then drives the pusher to perform a predetermined action, such as pushing or ejecting. The entire mechanism utilizes the gravity or inertial motion energy of the movable part itself, thereby achieving effective driving of the pusher without relying on an external power source or additional power source. This not only simplifies the system structure but also improves reliability and energy efficiency.

[0016] Preferably, the locking element includes a wedge block and a pushing element. The movable part abuts against the inclined surface of the wedge block, and the wedge block is connected to the pushing element. The pushing element is used to push the wedge block to slide in the front-back direction. The pushing element is driven by a hydraulic or electric drive device to precisely drive the wedge locking block to enter or exit the locking groove along the guide rail, thereby realizing the mechanical locking and releasing of the movable part's movement state. The self-locking characteristic of the wedge block ensures stability in the crushing state, and the locking can be quickly released by reverse extraction. This allows the mineral grinding mill to safely and flexibly switch between a high-intensity stable crushing state and an active cleaning state required for maintenance, effectively improving the continuous operation efficiency of the equipment and reducing maintenance time costs.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0018] This invention transforms the grate assembly from a traditional passive screening structure into a functional structure with active cleaning capabilities by incorporating a movable part that slides radially along the shell within the grate component and linking this movable part with the crushing and pushing components. When ore becomes stuck in the material discharge gap during crushing, the movement of the movable part directly triggers a cleaning action in the discharge gap, reducing the probability of continuous blockage at the source and avoiding poor material discharge caused by blockage.

[0019] This invention does not clear blockages in ore from a single direction, but rather uses a crushing component to laterally crush the ore within the material discharge gap, while simultaneously using a pushing component to push and disturb the ore below the gap, subjecting the stuck ore to forces from multiple directions. This multi-directional coordinated clearing method effectively breaks the wedging state of the ore within the discharge gap, significantly improving the clearing effect on stubborn blockages.

[0020] By setting multiple abutment blocks along the sliding direction on the movable part, the movable part can push the abutment cone multiple times during one radial sliding process, thereby driving the crushing part to reciprocate multiple times. This structure achieves the working effect of "one sliding, multiple crushing", enabling the crushing part to continuously squeeze the ore in the material drop gap in a short time, effectively increasing the probability of the ore being crushed and loosened, and avoiding the problem that it is difficult to crush by relying on a single impact.

[0021] In the non-cleaning state, the crushed parts are completely housed in the receiving groove of the fixed part, and the push rod of the pusher is also housed in the clearance groove, so as not to interfere with the normal passage of ore through the material drop gap. The moving part is locked by the locking part, so that the grate assembly maintains a stable screening state under normal crushing conditions, thereby ensuring that the mineral grinder can maintain a high discharge efficiency even without blockage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the housing and crushing component of the present invention.

[0024] Figure 3 This is a schematic diagram of the structure of the fixed part and the movable part of the present invention.

[0025] Figure 4 This is a schematic diagram of the abutting component and the breaking component of the present invention.

[0026] Figure 5 This is a schematic diagram of the connection component of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure of the pusher component of the present invention arranged along the fixed part.

[0028] Figure 7 This is a schematic diagram of the locking component of the present invention.

[0029] Figure label:

[0030] 1. Shell; 2. Crushing assembly; 3. Grate assembly; 31. Fixed part; 32. Moving part; 33. Receiving groove; 34. Mounting groove; 35. Connecting block; 4. Abutting assembly; 41. Abutting block; 42. Abutting cone; 43. Tension spring; 5. Locking element; 51. Wedge block; 52. Pushing element; 6. Pushing element; 61. Rotating rod; 62. Pushing rod; 63. Cone head; 64. Clearing groove; 7. Connecting assembly; 71. Eccentric block; 72. Base plate; 8. Reset element; 9. Crushing element; 91. Crushing plate; 92. Crushing cone. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1-6 As shown, a mineral grinding mill includes a shell 1, a crushing component 2, and a grate plate component disposed on the shell 1. The shell 1 is an integrally enclosed structure, and its interior forms a working chamber for accommodating ore and crushing and grinding it. The shell 1 is usually made of high-strength metal material to ensure sufficient structural strength and stability under the high-speed operation of the crushing component 2 and the repeated impact of the ore. The crushing component 2 is disposed inside the shell 1, located in the central area of ​​the shell 1. The crushing component 2 rotates at high speed under the drive of a power device to perform preliminary crushing of the ore entering the shell 1. During operation, the crushing component 2 generates a large impact force and centrifugal force, causing the ore to be continuously struck, tumbled, and squeezed inside the shell 1. The grate plate component is disposed on the inner side wall of the shell 1 and arranged circumferentially along the shell 1.

[0033] The grate assembly is arranged in a ring shape. Its main function is to screen ore that has been crushed to a certain particle size, allowing ore that meets the particle size requirements to be discharged through the discharge gap, while ore that does not meet the particle size requirements remains inside the shell 1 to be further crushed by the crushing component 2. The grate assembly consists of multiple grate components 3, which are spaced apart around the circumference of the shell 1, forming a discharge gap between adjacent grate components 3. The width of the discharge gap is set according to the actual grinding requirements to control the final output particle size. The grate component 3 mainly consists of a fixed part 31, a movable part 32, a crushing component 9, an abutment component 4, a pushing component 6, and a connecting component 7.

[0034] The fixing part 31 is a long strip of metal block that is firmly installed on the inner wall of the housing 1 by bolts or welding. In order to accommodate the movable part 32, a mounting groove 34 extending radially along the housing 1 is provided at the center of the fixing part 31. The cross-section of the mounting groove 34 can be designed as rectangular or T-shaped to provide good guidance and restraint.

[0035] The movable part 32 is a long strip-shaped slider that fits into the mounting groove 34 with a clearance. The movable part 32 can slide freely radially within the mounting groove 34. It is worth noting that the top of the movable part 32, that is, the part that contacts the crushing component 2, is designed with an inverted V-shaped structure. First, the pointed tip of the inverted V-shape can split the falling ore flow in two like a chopping knife, causing it to slide towards the material drop gaps on both sides, preventing the ore from accumulating on the top surface of the grate. Second, when the crusher hits the inverted V-shaped inclined surface, the vertical impact force is decomposed into horizontal and vertical components, reducing direct vibration damage to the mechanism below. At the same time, the horizontal component helps to push the ore towards the material drop gap. The fixed part 31 and the movable part 32 are made of medium carbon alloy steel and have undergone quenching and tempering treatment to ensure sufficient toughness and strength to prevent breakage under strong vibration.

[0036] To solve the problem of material discharge gap blockage, this embodiment provides a movable crushing component 9 on the side of the fixing part 31. The crushing component 9 includes a crushing plate 91 and a crushing cone 92 disposed on the crushing plate 91. A receiving groove 33 is machined on the side wall of the fixing part 31. The main body of the crushing component 9 is a high-hardness crushing plate 91, which is slidably installed in this receiving groove 33 to avoid affecting the falling of the crushed ore.

[0037] The upper and lower edges of the crushing plate 91 are tightly fitted with the inner wall of the receiving groove 33, forming a guide pair. When the crushing plate 91 is fully retracted into the receiving groove 33, its outer surface is flush with the side surface of the fixing part 31, without affecting the normal material discharge gap width. The power driving the crushing plate 91 comes from the radial movement of the moving part 32. Specifically, a connecting block 35 extends from the side of the crushing plate 91 facing the inside of the mounting groove 34. The connecting block 35 passes through the wall thickness of the fixing part 31 and enters the inside of the mounting groove 34. An abutment cone 42 is installed at the end of the connecting block 35. The crushing plate 91 can be a single plate or multiple small plates arranged in sections to facilitate individual replacement after partial damage, reducing maintenance costs.

[0038] The abutment assembly 4 includes an abutment block 41 and an abutment cone 42. The abutment block 41 is mounted on the side of the movable part 32, and the abutment cone 42 is fixedly disposed on the side of the connecting block 35 near the mounting groove 34. The abutment block 41 is fixedly disposed on the movable part 32, and the conical surface of the abutment cone 42 faces the abutment block 41. Multiple abutment blocks 41 are arranged along the sliding direction of the movable part 32, and each abutment block 41 is arranged sequentially along the length direction of the movable part 32. The abutment cone 42 has an inclined surface, and the abutment block 41 also has a corresponding contact point or The inclined surface, by setting multiple abutment blocks 41, allows the movable part 32 to abut against the abutment cone 42 multiple times during a radial sliding process of a large stroke, thereby pushing the crushed part 9 toward the material drop gap multiple times. The contact surface between the abutment block 41 and the abutment cone 42 is not limited to a planar inclined surface, but can be designed as a combination of roller and cam, that is, a roller is installed on the connecting block 35 and a wave-shaped cam track is set on the movable part 32. This can greatly reduce frictional resistance, improve mechanical efficiency, and extend service life.

[0039] When the movable part 32 slides away from the center of the housing 1 relative to the fixed part 31, the multiple abutting blocks 41 on the movable part 32 will successively impact or push the abutting cone 42 on the connecting block 35. Due to the inclined wedge effect, this longitudinal thrust is converted into a lateral thrust, forcing the crushing plate 91 to pop out and extend into the material drop gap. After one abutting block 41 passes the abutting cone 42, the crushing plate 91 quickly retracts under the action of the tension spring 43. Then the next abutting block 41 pushes the abutting cone 42 again. Therefore, when the movable part 32 slides radially for a long distance, the crushing plate 91 will perform multiple reciprocating movements on the side of the material drop gap. This high-frequency reciprocating impact can effectively squeeze and crush the ore stuck in the gap, making it break and loosen.

[0040] A tension spring 43 is installed between the crushing component 9 and the fixing part 31. One end of the tension spring 43 is fixedly connected to the crushing component 9, and the other end is fixedly connected to the fixing part 31. The tension spring 43 is used to apply a pull force to the crushing component 9 after the crushing component 9 loses the thrust from the abutment component 4, so that the crushing component 9 can automatically reset to the inside of the receiving groove 33. By setting the tension spring 43, the crushing component 9 can quickly return to the initial position after crushing the ore in the material drop gap, avoiding the crushing component 9 from being extended out of the material drop gap for a long time and affecting normal material discharge.

[0041] A pusher 6 is rotatably mounted on the fixed part 31. The pusher 6 includes a rotating rod 61, a plurality of push rods 62 mounted on the rotating rod 61, and a cone 63 at the end of each push rod 62. The rotating rod 61 is arranged along the length of the fixed part 31 and is mounted on the fixed part 31 by rotation. The plurality of push rods 62 are spaced apart along the length of the rotating rod 61, and a cone 63 is fixedly mounted on the end of each push rod 62 away from the rotating rod 61. The cone 63 is used to push and clear the ore in or below the material drop gap.

[0042] A clearance groove 64 is provided on the fixed part 31 corresponding to the position of the push rod 62, so that the push rod 62 can be completely stored inside the fixed part 31 when not in operation, so as to avoid affecting the normal feeding of ore. The push part 6 and the movable part 32 are linked by the connecting component 7.

[0043] The connecting assembly 7 includes an eccentric block 71 and a base plate 72. The eccentric block 71 is fixedly disposed on the side of the rotating rod 61 near the movable part 32. The base plate 72 is fixedly disposed on the bottom of the movable part 32 and protrudes a distance from the bottom of the movable part 32 toward the position of the eccentric block 71, so that the base plate 72 and the eccentric block 71 can abut against each other. When the movable part 32 slides down along the mounting groove 34 under the action of external force, the base plate 72 at the bottom of the movable part 32 will exert a squeezing force on the eccentric block 71. Since the eccentric block 71 is fixed on the rotating rod 61, the eccentric block 71 will push the rotating rod 61 to rotate after being subjected to compressive force, thereby driving the push rod 62 to rotate around the rotating rod 61. In other embodiments of the present invention, the connecting component 7 can also be a gear and a rack. The gear and the rack mesh with each other. The gear is fixedly set on the rotating rod 61, and the rack is opened on the movable part 32. When the movable part 32 descends, since the gear and the rack mesh with each other, the movable part 32 descends, that is, moves in a direction away from the center of the housing 1. The rack drives the gear to rotate, and the rotation of the gear drives the rotating rod 61 to rotate, thereby causing the push member 6 to rotate. When the connecting component 7 uses a gear and a rack, it is not necessary to set a reset member 8. Since the gear and the rack mesh with each other, when the movable part 32 moves towards the center of the housing 1, the rotating rod 61 is reset under the action of the gear.

[0044] A reset element 8 is installed between the pusher 6 and the fixed part 31. The reset element 8 is preferably a torsion spring. One end of the torsion spring is fixedly connected to the fixed part 31, and the other end is fixedly connected to the rotating rod 61. The torsion spring is used to apply a reset force to the rotating rod 61 after the connecting assembly 7 loses the thrust from the moving part 32, so that the rotating rod 61 and the pusher 62 return to their initial positions.

[0045] A locking member 5 is provided on the housing 1 to lock the movable part 32 onto the fixed part 31. The locking member 5 includes a wedge block 51 and a pushing member 52. The wedge block 51 is located on the outside of the movable part 32, and its inclined surface abuts against the movable part 32. The pushing member 52 is connected to the wedge block 51 and is used to push the wedge block 51 to move in a predetermined direction. When the pushing member 52 pushes the wedge block 51 into the locking position, the inclined surface of the wedge block 51 will exert a pressing force on the movable part 32, so that the movable part 32 is reliably locked in the fixed part 31 and cannot slide radially along the mounting groove 34. At this time, the grate assembly 3 is in a rigid fixed state, which is suitable for the mineral grinder to operate under high load and high efficiency crushing conditions.

[0046] When it is necessary to clean the material drop gap, the wedge block 51 is disengaged from the locked position by the pusher 52, which releases the lock on the movable part 32, allowing the movable part 32 to slide radially along the mounting groove 34 under the action of the crushing component 2 or its own weight. Specifically, the pusher 52 is an electric push rod. In addition to using an electric push rod to drive the wedge block 51, it can also be driven directly by a hydraulic cylinder, or adjusted by a manual knob in conjunction with a lead screw, to meet the needs of different costs and levels of automation.

[0047] Working principle of the invention:

[0048] Under normal crushing conditions of the mineral grinding mill, the locking part 5 is locked, and the movable part 32 is fixed inside the fixed part 31. The crushing assembly 2 rotates at high speed, continuously impacting and crushing the ore entering the shell 1. The crushed ore is thrown towards the grate assembly under the action of centrifugal force and gravity. When the ore particle size is smaller than the width of the discharge gap, the ore is discharged through the discharge gap. When the ore has high hardness or irregular shape, some ore is easily stuck in the discharge gap. At this time, by releasing the locking part 5 from locking the movable part 32, the movable part 32 can slide radially under the impact of the crushing assembly 2.

[0049] When the movable part 32 slides away from the center of the shell 1, the multiple abutting blocks 41 on the movable part 32 will push the abutting cone 42 in sequence, causing the crushing part 9 to move multiple times toward the material drop gap. After the crushing cone 92 on the crushing part 9 extends into the material drop gap, it will laterally squeeze and crush the ore stuck in the material drop gap, causing the ore to break or loosen.

[0050] During the return or descent of the movable part 32, the bottom plate 72 at the bottom of the movable part 32 pushes the eccentric block 71, causing the pusher 6 to rotate. The pusher rod 62 and its end cone 63 extend from inside the fixed part 31, pushing the ore below the material drop gap, pushing the stuck or accumulated ore back into the housing 1, so that it can participate in the crushing again. After the movable part 32 stops moving, the tension spring 43 resets the crushing part 9, and the torsion spring resets the pusher 6, and all structures return to their initial state, and the mineral grinder continues normal crushing operations.

[0051] 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 changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A mineral grinding mill, comprising a housing (1), a crushing assembly (2), and a grate assembly disposed on the housing (1), characterized in that: The grate assembly includes multiple grate assemblies (3) arranged circumferentially along the housing (1). A material drop gap is formed between adjacent grate assemblies (3). The grate assembly (3) includes a fixed part (31) fixedly mounted on the housing (1) and a movable part (32) sliding radially within the fixed part (31) along the housing (1). A crushing element (9) is slidably mounted on the outer side of the fixed part (31). An abutting component (4) is installed between the crushing element (9) and the movable part (32) so that when the movable part (32) slides toward a direction away from the center of the housing (1), the crushing element (9) slides toward the material drop gap. The fixing part (31) is a long strip-shaped block fixedly mounted on the housing (1). The fixing part (31) has a mounting groove (34) extending radially along the housing (1). The opening of the mounting groove (34) faces the center of the housing (1). The movable part (32) is slidably mounted in the mounting groove (34). The movable part (32) is a long strip-shaped slider that is slidably installed in the mounting groove (34). The top of the slider is inverted V-shaped so that the crushing component (2) and the movable part (32) can crush the ore. The crushing component (9) includes a crushing plate (91) and a crushing cone (92). The side of the fixed part (31) is provided with a receiving groove (33). The upper and lower sides of the crushing plate (91) are respectively attached to the upper and lower inner walls of the receiving groove (33) to provide guidance for the sliding of the crushing plate (91). When the side of the crushing plate (91) near the movable part (32) is completely attached to the receiving groove (33), the crushing component (9) is completely located in the receiving groove (33) to avoid affecting the crushed ore falling out from the material drop gap. A connecting block (35) is provided on the side of the crushing plate (91) near the movable part (32) and extends into the mounting groove (34). The abutting component (4) includes an abutting block (41) and an abutting cone (42). The abutting cone (42) is fixedly provided on the side of the connecting block (35) near the mounting groove (34). The abutting block (41) is fixedly provided on the movable part (32). The cone surface of the abutting cone (42) faces the abutting block (41). Multiple abutting blocks (41) are provided along the sliding direction of the movable part (32) so that when the movable part (32) slides away from the center of the shell (1), the abutting block (41) can push the abutting cone (42) out of the mounting groove (34) multiple times, thereby crushing the ore in the material drop gap. The crushing component (2) rotates at high speed under the drive of the power unit, generating impact force and centrifugal force, causing the ore to be continuously hit, tumble and squeezed inside the shell (1); The housing (1) is provided with a locking member (5) for locking the movable part (32) onto the fixed part (31). A pusher (6) is rotatably provided on the fixed part (31). A connecting assembly (7) is installed between the pusher (6) and the movable part (32) so that when the movable part (32) descends, it pushes the end of the pusher (6) to rotate toward the material drop gap. A reset member (8) is installed between the pusher (6) and the fixed part (31) so that after the connecting assembly (7) loses the thrust of the movable part (32), the pusher (6) resets to a state that is radially parallel to the housing (1).

2. The mineral grinding mill according to claim 1, characterized in that, A tension spring (43) is installed between the broken part (9) and the fixed part (31) so that the broken part (9) can be reset after losing the thrust of the abutting component (4).

3. The mineral grinding mill according to claim 1, characterized in that, The pusher (6) includes a rotating rod (61), a pusher rod (62), and a cone (63). The rotating rod (61) is rotatably mounted on the fixed part (31). Multiple pushers (62) are arranged along the length of the rotating rod (61). Multiple clearance grooves (64) corresponding to the pushers (62) are provided on the fixed part (31). The cone (63) is fixedly mounted at the end of the pusher rod (62) away from the rotating rod (61).

4. The mineral grinding mill according to claim 3, characterized in that, The reset component (8) is a torsion spring, with one end connected to the fixed part (31) and the other end connected to the rotating rod (61).

5. The mineral grinding mill according to claim 3, characterized in that, The connecting assembly (7) includes an eccentric block (71) and a base plate (72). The eccentric block (71) is fixedly disposed on the side of the rotating rod (61) near the movable part (32). The base plate (72) is fixedly disposed at the bottom of the movable part (32). The base plate (72) abuts against the eccentric block (71) so that the rotating rod (61) is pushed to rotate when the movable part (32) descends.

6. The mineral grinding mill according to claim 1, characterized in that, The locking member (5) includes a wedge block (51) and a pusher (52). The movable part (32) abuts against the inclined surface of the wedge block (51). The wedge block (51) is connected to the pusher (52). The pusher (52) is used to push the wedge block (51) to slide in the front-back direction.

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