Multi-stage mineral aggregate screening equipment

Abstract

The utility model relates to multi-stage mineral aggregate screening equipment which comprises a main box body communicated with an output port of crushing equipment, a multi-stage screening assembly is arranged in the main box body, and the multi-stage screening assembly is used for sequentially finishing screening of ores with various sizes by constructing screen structures with different mesh sizes. Mounting frames of the multi-stage screening assembly are arranged on the two opposite inner side walls of the main box body in a staggered and spaced mode, ore transferring assemblies are inserted into the side walls of the main box body, and the ore transferring assemblies are arranged below the mounting frames in the same distribution mode as the mounting frames. A plurality of dust separation assemblies capable of constructing a separation air curtain above a penetrating station of the ore transfer assembly are further arranged in the main box body; the outer side of the main box body is further provided with a dust falling assembly communicated with the box cavity of the main box body and used for pulling dust to be discharged directionally. According to the utility model, different specifications of classified screening and dust blocking can be continuously carried out on ores.

Description

Technical Field

[0001] The utility model relates to the technical field of ore screening equipment, in particular to multi-stage ore screening equipment. Background Art

[0002] Ore refers to rocks mined from mines that contain valuable minerals. After undergoing various stages of processing, such as crushing and grinding, ore can be used in engineering applications such as metal mining, metallurgy, chemicals, construction, railway and highway construction, cement, and sand and gravel. After mining, ore undergoes multiple stages of processing before it can be used. Ore processing begins with crushing and screening to select individual pieces that meet specific size requirements.

[0003] However, existing ore screening equipment is usually only able to screen ore particles within a single particle size threshold range, and is unable to perform classification and screening of multiple sizes and specifications as needed, and is unable to meet the increasingly complex production application needs. Although it is possible to consider setting up multiple screening equipment that can screen ores of different specifications for splicing screening, the assembled screening structure cannot effectively transfer the screened ore materials of various specifications, and workers are required to manually transfer the screened ore materials on a regular basis. This is inconvenient and cannot be applied to the classified output of multi-size screened materials for large-scale processing, affecting the overall efficiency of ore screening work. In addition, the splicing screening structure has many assembly gaps, which can easily cause dust to spread in the external environment, causing pollution to the environment and damage to the health of workers. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-stage mineral screening equipment that can continuously perform graded screening and continuous output of ore of different specifications to improve the diversity and efficiency of screening, and at the same time can avoid excessive dust overflow by effectively separating the multi-stage screening structure from the external environment, thereby avoiding dust pollution of the environment and damage to the health of workers, so as to solve the problem that the existing ore screening equipment cannot efficiently perform graded screening of crushed ore of multiple sizes and specifications, and cannot output multiple batches of ore of different sizes in one screening process.

[0005] The technical solution adopted by the present invention is: a multi-stage mineral screening equipment, including a main box body connected to the output port of the crushing equipment, wherein a multi-stage screening component is arranged in the main box body, which completes the screening of ores of various sizes in sequence by constructing a screen structure with different mesh sizes, wherein the mounting frames of the multi-stage screening component are staggered and arranged on the two opposing inner walls of the main box body, and an ore transfer component is inserted on the side wall of the main box body, and the ore transfer component is arranged below the mounting frame in the same distribution as the mounting frame. A number of dust isolation components that can construct a separation air curtain above the penetration station of the ore transfer component are also arranged in the main box body; a dust reduction component that is connected to its box cavity and draws dust for directional discharge is also provided on the outside of the main box body.

[0006] According to a preferred embodiment, the multi-stage screening assembly includes a mounting frame, a shaping plate, a screen and a driving mechanism, wherein the mounting frame is obliquely mounted in the inner cavity of the main box, and the shaping plate is movably provided on the upper surface of the mounting frame, and the connecting column of the positioning plate passes through the mounting frame and is transmission-connected to the driving mechanism installed on the lower surface of the mounting frame, and the screen is clamped in the middle frame cavity defined by the positioning plate.

[0007] According to a preferred embodiment, a plurality of through guide grooves with mutually parallel slotting directions are circumferentially spaced apart on the mounting frame, and the connecting column arranged on the lower surface of the positioning plate is passed through the through guide grooves; the axial lower end of the connecting column is transmission-connected to the driving mechanism.

[0008] According to a preferred embodiment, the driving mechanism includes a shell, a rotary drive motor, an eccentric wheel, a bearing, a triangular transmission frame, a push rod and a guide sleeve, wherein the shell is mounted on the lower surface of the mounting frame, and the rotary drive motor is arranged on the inner bottom surface of the shell, the output end of the rotary drive motor located at its axial upper end is transmission-connected to the deflection wheel, and the upper surface of the deflection wheel is provided with the bearing coinciding with its axis; the bearing is also connected to the triangular transmission frame capable of following its synchronous movement; the end of the triangular transmission frame away from the bearing is rotatably connected to the push rod, and the push rod is movably passed through the guide sleeve; the guide sleeve is passed through the side wall surface of the shell close to the connecting column.

[0009] According to a preferred embodiment, the push rod is inserted into the guide sleeve and one end thereof extending to the outside of the housing is connected to the connecting column.

[0010] According to a preferred embodiment, through openings for the passage of the ore transfer assembly are staggered on the two opposing side walls of the main box body, a lower elastic baffle is provided at the lower edge of the through opening, which can be abutted against the lower surface of the ore transfer assembly to block the lower opening gap, and the dust isolation assembly is provided at the upper end of the through opening.

[0011] According to a preferred embodiment, the ore transfer assembly includes a support frame, a transmission wheel and a conveyor belt, wherein the two transmission wheels are supported on the inner and outer sides of the main box body respectively through the support frame, so that the conveyor belt wrapped around the two transmission wheels constructs an inclined conveying plane.

[0012] According to a preferred embodiment, the transmission wheel located outside the main box body is also connected to the transmission rotating motor, and a receiving trough shell capable of receiving the ore transferred by the conveyor belt is also provided on the outer wall of the main box body; and a connecting strip plate is also provided on the belt body of the conveyor belt.

[0013] According to a preferred embodiment, the exhaust strip pipe of the dust isolation assembly is installed on the upper side of the through-hole, and an exhaust strip groove is provided on the lower surface of the exhaust strip pipe; the exhaust strip pipe is also connected to an external pressurized air pump through an air supply pipe that passes through the box wall of the main box body.

[0014] According to a preferred embodiment, the dust reduction assembly includes an air duct inserted into the top surface of the box body, a driving fan installed in the air duct, and a filter water tank installed at the output end of the air duct.

[0015] The beneficial effects of the utility model are:

[0016] The multi-stage screening component provided by the present application can construct multiple screen structures with gradually increasing mesh sizes according to demand, so that the ore and the ore can be classified and screened in batches through the screen structures with different mesh sizes, so as to divide the mixed ore into a variety of ore materials with sizes in different particle size ranges, so as to facilitate the classified application of the ore materials, and realize the classification and screening of ore of multiple sizes in a single screening process, so as to meet the increasingly complex production application needs and improve the diversity and efficiency of screening. The present application is also provided with an ore transfer component that matches the multi-stage screening component, so as to realize the continuous transfer of the classified screened ore, so as to be suitable for large-scale batch ore screening and processing. The present application sets a multi-stage screening component capable of classifying and screening ores with different particle size threshold ranges in the main box, thereby avoiding the connection between the screening structure and the external environment, reducing the spread of dust generated in the screening process in the external environment and the pollution to the environment, especially being able to complete multi-stage classification and screening in a relatively closed inner cavity space, avoiding the problems of large dust overflow and large environmental pollution caused by splicing multiple single screening devices for classification and screening, thereby reducing the harm of dust to the human body. The dust isolation component set in the present application can effectively block the overflow of dust by forming an air curtain at the through-port of the main box, thereby improving the effectiveness of the internal and external separation. The present application also provides a dust reduction component to continuously clean the dust to avoid excessive dust accumulation in the main box and affecting the screening work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a preferred multi-stage mineral screening device proposed by the utility model;

[0018] Figure 2 This is an enlarged structural diagram of part A of a preferred multi-stage mineral screening device proposed by the present invention;

[0019] Figure 3 It is a planar schematic diagram of a driving mechanism of an optimal multi-stage mineral screening device proposed by the utility model.

[0020] Reference Signs List

[0021] 1: Main box; 2: Multi-stage screening assembly; 3: Ore transfer assembly; 4: Dust isolation assembly; 5: Dust suppression assembly; 11: Through port; 12: Lower elastic baffle; 13: Feed port; 14: Discharge port; 15: Support seat; 16: Inclined roller; 21: Mounting frame; 22: Shaping plate; 23: Screen; 24: Driving mechanism; 31: Support frame; 32: Drive wheel; 33: Conveyor belt; 34: Drive rotary motor; 35: Connector Receiver housing; 41: Exhaust strip pipe; 42: Air supply pipe; 43: External pressurized air pump; 51: Air guide pipe; 52: Drive fan; 53: Filter water tank; 211: Through guide groove; 221: Connecting column; 241: Housing; 242: Rotary drive motor; 243: Eccentric wheel; 244: Bearing; 245: Triangular transmission frame; 246: Push rod; 247: Guide sleeve; 331: Connecting strip plate; 411: Exhaust strip groove. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] The following will describe in detail the technical solutions provided by the present invention by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In some cases, some implementations are not described or are not described in detail because they belong to existing or conventional technologies.

[0024] In addition, the technical features described herein, or the steps of all methods or processes disclosed herein, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0025] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" in this application, where reasonable (and not self-contradictory), include both direct and indirect connections (couplings).

[0026] The following is a detailed description with reference to the accompanying drawings.

[0027] Example 1

[0028] The present application provides a multi-stage mineral screening device, which includes a main box 1, a multi-stage screening component 2, an ore transfer component 3, a dust isolation component 4 and a dust reduction component 5.

[0029] according to Figure 1-2 In a specific embodiment shown, the top of the main box 1 is connected to the output port of the crushing equipment. A multi-stage screening assembly 2 is provided in the main box 1, which completes the screening of ores of various sizes in sequence by constructing a screen structure with different mesh sizes. The mounting frames 21 of the multi-stage screening assembly 2 are staggered and arranged on the two opposing inner walls of the main box 1. An ore transfer assembly 3 is inserted into the side wall of the main box 1. The ore transfer assembly 3 is arranged below the mounting frame 21 in the same distribution as the mounting frame 21. The main box 1 is also provided with a number of dust isolation assemblies 4 that can construct a separation air curtain above the penetration station of the ore transfer assembly 3. A dust reduction assembly 5 that is connected to its box cavity and draws dust for directional discharge is also provided on the outside of the main box 1. The multi-stage screening component 2 provided in the present application can construct a plurality of screen structures with gradually increasing mesh sizes according to demand, so that the ore and the ore can be classified and screened in batches by passing through the screen structures with different mesh sizes, so as to divide the mixed ore into a variety of ore materials with sizes in different particle size ranges, so as to facilitate the classification and application of the ore materials, and realize the classification and screening of ore of multiple sizes in a single screening process, so as to meet the increasingly complex production application needs and improve the diversity and efficiency of screening. The present application is also provided with an ore transfer component 3 that matches the multi-stage screening component 2, so as to realize the continuous transfer of the classified screened ore, so as to be suitable for large-scale batch ore screening and processing. The present application sets a multi-stage screening component 2 capable of classifying and screening ores with different particle size threshold ranges in the main box 1, thereby avoiding the connection between the screening structure and the external environment, reducing the spread of dust generated in the screening process in the external environment and the pollution to the environment, especially being able to complete multi-stage classification and screening in a relatively closed inner cavity space, avoiding the problems of large dust overflow and large environmental pollution caused by splicing multiple single screening devices for classification and screening, thereby reducing the harm of dust to the human body. The dust isolation component 4 set in the present application can effectively block the overflow of dust by forming an air curtain at the through-port 11 of the main box 1, thereby improving the effectiveness of the internal and external separation. The present application also provides a dust reduction component 5 to continuously clean the dust to avoid excessive dust accumulation in the main box 1 and affecting the screening work.

[0030] Preferably, through openings 11 for the passage of the ore transfer assembly 3 are staggered on the two opposing side walls of the main box body 1. Preferably, a lower elastic baffle 12 is provided at the lower edge of the through opening 11, which can be abutted against the lower surface of the ore transfer assembly 3 to block the lower opening gap. Further preferably, a dust isolation assembly 4 is provided at the upper end of the through opening 11. Preferably, a port for inputting ore that has completed crushing processing is provided at the top of the main box body 1. Further preferably, a discharge port 14 is also provided at the bottom of the main box body 1 for discharging oversized ore screened out by the multi-stage screening assembly 2. Further preferably, a support seat 15 is also provided at the bottom of the main box body 1 to support it in suspension. Preferably, the box cavity of the main box body 1 can also guide the inclined roller 16 to effectively transfer the ore from the upper level screen 23 to the next level screen 23. The through-port 11 provided in the present application can facilitate the ore transfer component 3 to continuously transfer the ore screened by the multi-stage screening component 2 to the outside of the box cavity for the next processing or transportation, and the through-port 11 effectively blocks the gap between the through-port 11 and the ore transfer component 3 through the lower elastic baffle 12 provided on the lower side and the partition component 4 on the upper side thereof, so as to reduce the amount of dust discharged from the through-port 11, thereby reducing the pollution of dust to the environment, improving safety to a certain extent and reducing harm to workers.

[0031] Preferably, the multi-stage screening assembly 2 comprises a mounting frame 21, a shaping plate 22, a screen 23, and a drive mechanism 24. Preferably, the mounting frame 21 is tilted and mounted within the inner cavity of the main housing 1. Preferably, the shaping plate 22 is movably mounted on the upper surface of the mounting frame 21. Specifically, the connecting posts 221 of the positioning plate 22 extend through the mounting frame 21 and are in transmission connection with the drive mechanism 24 mounted on the lower surface of the mounting frame 21. Preferably, the screen 23 is sandwiched within the central cavity defined by the positioning plate 22. Specifically, the positioning plate 22 is a double-layered hollow annular plate. The two plates can clamp the edges of the screen 23, effectively spreading the screen 23 so that it can carry ore and screen the ore using the sieve apertures. Further preferably, the screen 23, defined and deployed by different shaping plates 22, increases in mesh size stepwise away from the top surface of the main housing 1, allowing for batch sorting and screening of ores of various sizes and particle size thresholds. Preferably, a plurality of through guide grooves 211 with mutually parallel slotting directions are provided on the mounting frame 21 at an annular interval. Further preferably, a connecting column 221 provided on the lower surface of the positioning plate 22 is provided in the through guide groove 211, so that the through guide groove 211 and the connecting column 221 cooperate with each other to define the translatable direction between the mounting frame 21 and the shaping plate 22. Preferably, the axial lower end of the connecting column 221 is connected to the driving mechanism 24 in a transmission manner so that the driving mechanism 24 can drive the connecting column 221 and the shaping plate 22 to translate back and forth along the slotting direction of the through guide groove 211, so that the screen 23 can screen the ore it carries by continuously reciprocating lateral shaking. The mounting frame 21 provided in the present application can be positioned and installed inside the box cavity of the main box body 1 to effectively position the layout of multiple screen structures for graded screening to ensure the stability and spacing uniformity of the screen installation position. The shaping plate 22 provided in the present application can effectively limit and expand the screen 23, thereby driving the screen 23 to shake according to demand and realize efficient screening of the ore, and can also make the ore intercepted by the screen 23 roll to the next level screen 23 with larger mesh by shaking along its inclined direction, thereby realizing screening of ore with a larger size range, and then the multiple staggered installation frames 21, shaping plates 22, and screens 23 provided can realize gradient batch screening of ores with different size threshold ranges, so as to complete the screening of ores of different particle sizes at different stages in a single screening process, thereby improving the diversity and functionality of screening, so that the crushed ore can be classified and screened according to application requirements, and ores of different sizes are output for different applications. The driving mechanism 24 provided in the present application can make the screen 23 shake by driving the shaping plate 22 to move back and forth, thereby screening the ore material carried on its upper surface. The driving mechanism 24 provided in the present application can move back and forth at high frequency to ensure sufficient screening shaking.

[0032] Preferably, the drive mechanism 24 includes a housing 241, a rotary drive motor 242, an eccentric wheel 243, a bearing 244, a triangular transmission frame 245, a push rod 246, and a guide sleeve 247. Preferably, the housing 241 is mounted on the lower surface of the mounting frame 21. Preferably, the rotary drive motor 242 is mounted on the inner bottom surface of the housing 241. Preferably, the output end of the rotary drive motor 242, located at its axially upper end, is drivingly connected to the deflection wheel 243. Preferably, a bearing 244 is provided on the upper surface of the deflection wheel 243, coinciding with its axis. Preferably, the bearing 244 is also connected to a triangular transmission frame 245 capable of synchronous movement therewith. Preferably, the end of the triangular transmission frame 245 remote from the bearing 244 is rotatably connected to the push rod 246. Further preferably, the push rod 246 is movably inserted into the guide sleeve 247, allowing it to reciprocate along the axial direction of the guide sleeve 247. Preferably, the guide sleeve 247 is provided on the side wall surface of the housing 241 near the connecting column 221. Preferably, the push rod 246 is inserted into the guide sleeve 247 and extends to one end outside the housing 241 to be connected to the connecting column 221, so as to drive the connecting column 221 to follow the push rod 246 in a horizontally parallel manner. Specifically, the axial direction of the push rod 246 is parallel to the slot direction passing through the guide groove 211, so that it can effectively drive the connecting column 221 to reciprocate along the slot direction passing through the guide groove 211. The housing 241 provided in the present application can effectively protect the rotary drive motor 242, the eccentric wheel 243, the bearing 244, the triangular transmission frame 245, the push rod 246 and its connecting structure, thereby preventing dust from coating or filling the connection gap and affecting the normal operation of the drive and transmission structure. The eccentric wheel 243 provided in the present application can rotate under the drive of the rotary drive motor 242, so that the bearing 244 can mobilize the triangular transmission frame 245 to rotate back and forth within a certain range, and then the push rod 246 whose moving direction is limited by the guide sleeve 247 continues to move back and forth horizontally, pushing the shaping plate 22 and the screen 23 to move back and forth relative to the mounting frame 21 to form screening shaking, so that the screen 23 can complete the effective screening of the ore.

[0033] Preferably, the ore transfer assembly 3 includes a support frame 31, a transmission wheel 32, and a conveyor belt 33. Preferably, the two transmission wheels 32 are supported on the inner and outer sides of the main housing 1 by the support frame 31, respectively, so that the conveyor belt 33 wrapped around the two transmission wheels 32 forms an inclined conveying plane. Preferably, the transmission wheel 32 located on the outer side of the main housing 1 is also in transmission connection with a transmission rotary motor 34. Preferably, a receiving trough shell 35 capable of receiving ore transferred by the conveyor belt 33 is also provided on the outer wall of the main housing 1. Preferably, a connecting strip 331 is also provided on the belt body of the conveyor belt 33. Preferably, the receiving trough shell 35 conveys the ore in a directionally controlled manner through an inclined conveyor pipe or inclined conveyor belt. The conveyor belt 33 provided in the present application can continuously drive the ore that meets the size standards screened out from the screen 23 to be transferred to the outside of the main box body 1 in a directional manner, and collect the ore by wrapping the support frame 31, the transmission wheel 32 and the receiving trough shell 35 of the conveyor belt 33 outside the main box body 1 and transfer the ore to the external aggregate or transfer equipment in a classified manner, thereby facilitating the next step of processing of the ores of various sizes that have completed the classified screening. The conveyor belt 33 provided in the present application also intercepts the ore by arranging triangular cross-section connecting strips 331 at intervals on its belt body, so that the ore can be effectively transferred along the conveyor belt 33 to avoid the ore rolling down and affecting the screening effect. The side edges of the conveyor belt 33 provided in the present application can also be provided with side fence plates as needed to prevent the ore from sliding off the two sides of the conveyor belt 33.

[0034] Preferably, the exhaust duct 41 of the dust isolation assembly 4 is installed above and to the side of the through-hole 11, and an exhaust groove 411 is provided on the lower surface of the exhaust duct 41. Preferably, the exhaust duct 41 is also connected to an external pressurized air pump 43 via an air supply pipe 42 that penetrates the wall of the main housing 1 to continuously supply pressurized air to the exhaust duct 41. The exhaust duct 41 provided in the present application can output a surface-shaped airflow from the exhaust groove 411, thereby forming an air curtain above the conveyor belt 33, ensuring that dust is effectively blocked on the inner wall of the main housing 1, reducing the possibility and amount of dust overflowing from the through-hole 11.

[0035] Preferably, the dust reduction assembly 5 includes an air duct 51 inserted into the top surface of the housing 1, a driving fan 52 installed in the air duct 51, and a filter water tank 53 installed at the output end of the air duct 51. The air duct 51 provided in the present application can pull the dust in the main housing 1 upward in a directional manner under the action of the driving fan 52, and then discharge it into the filter water tank 53 storing filtered water after passing through the air duct 51, so that the dust can be dissolved in the water and effectively filtered and cleaned.

[0036] The present utility model is not limited to the above-mentioned optional implementation methods. Anyone can derive other forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, any technical solution that falls within the scope defined by the claims of the present utility model falls within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A multi-stage mineral screening device, comprising a main box (1) connected to the output port of a crushing device, characterized in that: A multi-stage screening assembly (2) is provided in the main box (1) for sequentially screening ores of various sizes by constructing a screen structure with different mesh sizes, wherein the mounting frames (21) of the multi-stage screening assembly (2) are arranged at intervals on two aligned inner side walls of the main box (1). An ore transfer assembly (3) is inserted into the side wall of the main box (1), and the ore transfer assembly (3) is arranged below the installation frame (21) in the same distribution as the installation frame (21). The main box (1) is further provided with a plurality of dust isolation components (4) capable of forming a separation air curtain above the penetration station of the ore transfer component (3); A dust reduction component (5) is also provided on the outside of the main box body (1) and is in communication with the box cavity thereof to draw dust for directional discharge.

2. The multi-stage mineral screening equipment according to claim 1, characterized in that: The multi-stage screening assembly (2) comprises a mounting frame (21), a shaping plate (22), a screen (23) and a driving mechanism (24), wherein: The installation frame (21) is installed obliquely in the inner cavity of the main box (1), and the upper surface of the installation frame (21) is movably provided with the shaping plate (22), and the connecting column (221) of the shaping plate (22) passes through the installation frame (21) and is transmission-connected with the driving mechanism (24) installed on the lower surface of the installation frame (21). The screen (23) is sandwiched in the middle frame cavity defined by the shaping plate (22).

3. The multi-stage mineral screening equipment according to claim 2, characterized in that: A plurality of through guide grooves (211) with mutually parallel slotting directions are provided on the installation frame (21) at intervals in an annular direction, and the connecting column (221) provided on the lower surface of the shaping plate (22) is inserted into the through guide grooves (211); The axial lower end of the connecting column (221) is transmission-connected to the driving mechanism (24).

4. The multi-stage mineral screening equipment according to claim 3, characterized in that: The driving mechanism (24) includes a housing (241), a rotary driving motor (242), an eccentric wheel (243), a bearing (244), a triangular transmission frame (245), a push rod (246) and a guide sleeve (247), wherein: The housing (241) is mounted on the lower surface of the mounting frame (21), and the rotary drive motor (242) is mounted on the inner bottom surface of the housing (241). The output end of the rotary drive motor (242) located at the upper axial end thereof is transmission-connected to an eccentric wheel (243), and the upper surface of the eccentric wheel (243) is provided with the bearing (244) that coincides with its axis; The bearing (244) is also connected to the triangular transmission frame (245) capable of synchronously moving with the bearing; One end of the triangular transmission frame (245) away from the bearing (244) is rotatably connected to the push rod (246), and the push rod (246) is movably inserted into the guide sleeve (247); The guide sleeve (247) is disposed on a side wall surface of the housing (241) close to the connecting column (221).

5. The multi-stage mineral screening equipment according to claim 4, characterized in that: The pushing rod (246) is inserted into the guide sleeve (247) and one end thereof extending to the outside of the housing (241) is connected to the connecting column (221).

6. The multi-stage mineral screening equipment according to claim 5, characterized in that: The two opposing side walls of the main box (1) are staggeredly provided with through openings (11) for the ore transfer assembly (3) to pass through. A lower elastic baffle (12) is provided at the lower edge of the through-hole (11) and is capable of being attached to the lower surface of the ore transfer assembly (3) to block the lower opening gap. The dust isolation component (4) is provided at the upper end of the through-hole (11).

7. The multi-stage mineral screening equipment according to claim 6, characterized in that: The ore transfer assembly (3) includes a support frame (31), a transmission wheel (32) and a conveyor belt (33), wherein: The two transmission wheels (32) are supported on the inner and outer sides of the main box (1) respectively through support frames (31), so that the conveyor belt (33) wrapped around the two transmission wheels (32) forms an inclined conveying plane.

8. The multi-stage mineral screening equipment according to claim 7, characterized in that: The transmission wheel (32) located outside the main housing (1) is also in transmission connection with a transmission rotary motor (34), and a receiving tank shell (35) capable of receiving ore transferred by the conveyor belt (33) is also provided on the outer side wall of the main housing (1); A connecting strip (331) is also provided on the belt body of the conveyor belt (33).

9. The multi-stage mineral screening equipment according to claim 8, characterized in that: The exhaust strip pipe (41) of the dust isolation component (4) is installed above the side of the through-hole (11), and the lower surface of the exhaust strip pipe (41) is provided with an exhaust strip groove (411); The exhaust strip pipe (41) is also connected to an external pressurized air pump (43) via an air delivery pipe (42) that passes through the box wall of the main box body (1).

10. The multi-stage mineral screening equipment according to claim 9, characterized in that: The dust reduction assembly (5) comprises an air duct (51) inserted into the top surface of the box (1), a driving fan (52) installed in the air duct (51), and a filtering water tank (53) installed at the output end of the air duct (51).

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