A multi-stage ore crushing and screening device and its operation method

Abstract

The present invention relates to the technical field of ore crushing, and discloses an ore multi-stage crushing and screening device and its operation method, including a frame drive motor; a transmission crushing component for multi-stage crushing of ore; a self-circulation component for self-circulating and conveying the still relatively large ore after primary crushing to the inside of the transmission crushing component for re-circulation crushing; and a screening device for grading and screening the crushed ore. This ore multi-stage crushing and screening device, through the unique jaw crushing structure provided, can achieve multiple different types of crushing effects on the ore, thereby finely and efficiently crushing the ore. Moreover, the entire process does not require excessive costs, nor does it require equipment or manual transfer of materials, realizing self-flowing multi-stage crushing, thereby improving the diversification of the equipment's crushing and the effect of ore crushing, and making the basic sizes of the crushed ore similar, enhancing the consistency of ore crushing.

Description

Technical Field

[0001] The present invention relates to the technical field of ore crushing, and particularly to a multi-stage ore crushing and screening device and an operation method thereof. Background Technique

[0002] Ore crushing is an important technological step in the metallurgy and mining industries. According to different requirements for the particle size of the product, different crushing equipment is used, and even material selection steps such as screening are added. In order to meet the requirements for the particle size of materials in the industrial production process. A jaw crusher can crush larger materials. If smaller sizes need to be crushed, it requires multiple grindings, and the efficiency is not high.

[0003] Currently, the functions of existing crushing equipment are too single, and only single-form crushing can be achieved. For some large ores, a jaw crusher is required. After the jaw crusher crushes the ore, although it can crush large ores, the crushed ore still has a large degree of unevenness. At this time, it needs to be transferred to another crusher, such as a cone crusher or a counterattack crusher. This transfer method particularly affects the crushing efficiency of the ore, and requires more equipment, which not only increases the input cost but also reduces the crushing efficiency. After that, simple screening is used to filter the ore and the soil, and the screening method is also too single. Therefore, a multi-stage ore crushing and screening device and an operation method thereof are proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-stage ore crushing and screening device and an operation method thereof, which solve the problems in the prior art that the structure and function of the crusher are single, the crushing effect is poor, the self-circulating crushing cannot be realized, and the manual intervention is more, which affects the crushing efficiency.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A multi-stage ore crushing and screening device, comprising a frame; a driving machine; a transmission crushing component for multi-stage crushing of ore; a self-circulation component for self-circulating and conveying the still relatively large ore after primary crushing to the inside of the transmission crushing component for re-circulation crushing; a screening device for grading and screening the crushed ore; the transmission crushing component includes a transmission wheel, the transmission wheel is connected to the output end of the driving machine through a transmission member, an eccentric shaft is installed at the center of the transmission wheel, a pressure swing arm is connected to the surface of the eccentric shaft, the two sides of the pressure swing arm are respectively rotatably connected to a left connecting seat and a right connecting seat, a moving jaw plate is rotatably connected to the right connecting seat, the top of the moving jaw plate is rotatably connected to the frame through a shaft rod, a fixed jaw plate is arranged on the right side of the moving jaw plate, and the fixed jaw plate is installed on the frame; the cyclic action of the moving jaw plate cooperates with the fixed jaw plate to squeeze, realizing the primary crushing of the ore; the cyclic downward pressure of the pressure swing arm can re-crush the ore crushed by the moving jaw plate.

[0008] Preferably, a fixed frame is rotatably connected to the left connecting seat, the fixed frame is installed on the frame by bolts, a reset pull rod is slidably connected inside the fixed frame, the right end of the reset pull rod is rotatably connected to the bottom of the moving jaw plate, a reset spring is sleeved on the surface of the reset pull rod, one end of the reset spring is connected to the fixed frame, and the other end of the reset spring is connected to the reset pull rod.

[0009] Preferably, the self-circulation component includes a gear disk, the gear disk is fixed on the transmission wheel, a moving column is arranged on the side of the gear disk, both the moving column and the gear disk are provided with teeth, a second tray and a first tray are installed on the moving column at different heights, the surfaces of the second tray and the first tray are both slidably connected to the bottom box, and a fixed piece is fixedly connected inside the bottom box, and the fixed piece is located between the second tray and the first tray.

[0010] Preferably, a triangular frame is arranged below the fixed jaw plate inside the bottom box, a filter groove is arranged on the triangular frame, the triangular frame is of a hollow structure, and a slope is arranged inside the triangular frame.

[0011] Preferably, the right end of the reset pull rod is connected to a push rod, the right end of the push rod is connected to the triangular frame, the triangular frame is slidably connected inside the bottom box, and the left and right cyclic actions of the push rod will drive the left and right jitter of the triangular frame through the push rod, realizing the screening and filtering of the crushed ore.

[0012] Preferably, the screening device includes a rotating rod fixed on an eccentric shaft. A pull rod is rotatably connected to the rotating rod. The bottom of the pull rod is connected to a moving plate through a support rod. One side of the moving plate is slidably connected to a box base, and the other side of the moving plate is slidably connected to a material guiding frame. A dividing frame is installed on the material guiding frame, and a discharge port is formed in the dividing frame. A swinging filter screen is arranged above the material guiding frame.

[0013] Preferably, the left side of the swinging filter screen is rotatably connected to the material guiding frame. The bottom of the right side of the swinging filter screen abuts against a connecting piece, and the right side of the connecting piece is connected to the moving plate. The moving plate is located below the pressure swing arm. The bottom of the moving jaw plate is connected with a plurality of pressing needles.

[0014] Preferably, a drainage plate is rotatably connected to the box base. Pulling pins are connected to both sides of the drainage plate, and a lifting frame is connected to the pulling pins. The lifting frame is connected to the moving jaw plate through a connecting shaft.

[0015] Preferably, an inclined surface is formed inside the material guiding frame, and a discharge rack is arranged on one side of the material guiding frame.

[0016] A multi-stage crushing and screening method for ores:

[0017] It includes the following steps:

[0018] Step S1: Feeding. The ores to be crushed are fed into the inner part of the bottom box by using equipment or manually.

[0019] Step S2: Primary crushing. Through the rotation of the driving machine, the rotation of the eccentric shaft is driven by the transmission of multiple belts, and then the up and down movement of the pressure swing arm is driven. After that, through the movable connection between the right connecting seat and the moving jaw plate, the moving jaw plate is driven to swing around the upper connecting center, so as to perform jaw-type extrusion crushing on the ores located between the moving jaw plate and the fixed jaw plate.

[0020] Step S3: Crushing and circulating feeding. Through the rotation of the transmission wheel, the rotation of the gear disk is driven, and then the lifting of the moving column is driven through the meshing of the teeth. When the moving column lifts, it will drive the first tray and the second tray to move upward. For the ores that are still relatively large after crushing, they will roll or slide along the bottom of the triangular frame to the upper part of the first tray. Therefore, as the first tray moves upward, the relatively large ores will be continuously lifted to the step position of the fixed piece. After that, when the teeth on the gear disk are disengaged from the teeth on the moving column, at this time, the moving column moves downward under the action of gravity to reset. After the second tray moves downward to the height of the fixed piece, the ores on the fixed piece will roll onto the second tray. As the gear disk continues to rotate, driving the first tray and the second tray to lift, at this time, the second tray will drive the ores to continue to lift and move to a certain height, and then automatically feed them into the space between the fixed jaw plate and the moving jaw plate again to achieve double-pressure crushing.

[0021] Step S4: Drainage and secondary crushing. The small crushed ore will enter its interior through the filter holes on the tripod, slide into the upper part of the box seat from the slope position, and then slide along the inclined direction to the position of the dividing frame for blocking. The finer ore will roll from the position of the discharge port and enter the swing filter screen for filtration. When the pressure swing arm swings up and down, it will crush the ore located below it again in a pressing manner;

[0022] Step S5: Filtering and discharging. The ore after multiple crushings will be drained to the swing filter screen for filtration. Very small crushed stones, soil blocks, and dust will fall to the inclined surface for discharge, while some ore will be discharged from the position of the discharge rack along the inclined direction of the swing filter screen.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides an ore multi-stage crushing and screening device and its operation method, having the following beneficial effects:

[0025] 1. For this ore multi-stage crushing and screening device, through the unique jaw crushing structure provided, it can achieve multiple different types of crushing effects on the ore, thereby finely and efficiently crushing the ore. And throughout the process, there is no need to invest too much cost, nor is it necessary to transfer materials by equipment or labor, realizing self-flowing multiple crushing, thus improving the diversity of the equipment's crushing and the effect of ore crushing, and making the size of the crushed ore basically similar, enhancing the consistency of ore crushing.

[0026] 2. For this ore multi-stage crushing and screening device, through the self-circulation component provided, it can achieve automatic recycling and re-conveying of the ore that is still relatively large after the initial crushing to between the two jaw discs, and utilize the high-strength extrusion of the jaw type to achieve reciprocating multiple crushings, thereby further improving the overall ore crushing effect from the side.

[0027] 3. For this ore multi-stage crushing and screening device, through the screening device provided, it can effectively shake and screen the fine crushed stones, soil blocks, and massive ore, achieve classification, and facilitate the subsequent sorting and processing of the ore. Description of the drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of an ore multi-stage crushing and screening device proposed by the present invention;

[0029] Figure 2 It is a schematic diagram of the transmission and crushing component structure of an ore multi-stage crushing and screening device proposed by the present invention;

[0030] Figure 3Schematic structural diagram of a self-circulation component of a multi-stage ore crushing and screening device proposed by the present invention;

[0031] Figure 4 Schematic structural diagram of a tripod of a multi-stage ore crushing and screening device proposed by the present invention;

[0032] Figure 5 Schematic structural diagram of a screening device of a multi-stage ore crushing and screening device proposed by the present invention;

[0033] Figure 6 Schematic structural diagram of a pressure swing arm of a multi-stage ore crushing and screening device proposed by the present invention;

[0034] Figure 7 Schematic structural diagram of a moving column and a gear disk of a multi-stage ore crushing and screening device proposed by the present invention.

[0035] In the figure: 1, frame; 2, drive motor; 3, transmission and crushing component; 301, transmission wheel; 302, eccentric shaft; 303, pressure swing arm; 3031, pressing needle; 304, fixed frame; 305, left connecting seat; 306, right connecting seat; 307, moving jaw plate; 308, fixed jaw plate; 309, reset pull rod; 310, reset spring; 311, connecting shaft; 312, push rod; 4, self-circulation component; 401, gear disk; 402, moving column; 403, first tray; 404, second tray; 405, fixing piece; 406, bottom box; 407, tripod; 4071, slope; 5, screening device; 501, rotating rod; 502, pull rod; 503, support rod; 504, box seat; 505, material guiding frame; 506, inclined surface; 507, swinging filter screen; 508, dividing frame; 509, discharge port; 510, connecting piece; 511, drainage plate; 512, moving plate; 513, lifting frame; 514, pull pin. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1: Please refer to Figures 1-7 , a multi-stage ore crushing and screening device, including a frame 1; a drive motor 2; a transmission and crushing component 3 for performing multi-stage crushing on ore; a self-circulation component 4 for self-circulating and transporting the still relatively large ore after the first crushing to the inside of the transmission and crushing component 3 for re-circulating crushing; and a screening device 5 for classifying and screening the crushed ore.

[0038] In this embodiment, the transmission and crushing assembly 3 includes a transmission wheel 301. The transmission wheel 301 is connected to the output end of the driving machine 2 through a transmission member. An eccentric shaft 302 is installed at the axis center of the transmission wheel 301. A pressure swing arm 303 is connected to the surface of the eccentric shaft 302. The left connecting seat 305 and the right connecting seat 306 are respectively rotatably connected to both sides of the pressure swing arm 303. The moving jaw plate 307 is rotatably connected to the right connecting seat 306. The top of the moving jaw plate 307 is rotatably connected to the frame 1 through a shaft rod. A fixed jaw plate 308 is arranged on the right side of the moving jaw plate 307. The fixed jaw plate 308 is installed on the frame 1. The cyclic movement of the moving jaw plate 307 cooperates with the extrusion of the fixed jaw plate 308 to realize the primary crushing of the ore; the cyclic downward pressure of the pressure swing arm 303 can crush the ore crushed by the moving jaw plate 307 again. By the rotation of the driving machine 2, the rotation of the eccentric shaft 302 is driven by the transmission of multiple belts. Since the eccentric shaft 302 is eccentrically connected to the pressure swing arm 303, when the eccentric shaft 302 rotates eccentrically, it will drive the pressure swing arm 303 to swing eccentrically, realizing the movement of the up and down positions. Then, through the movable connection between the right connecting seat 306 and the moving jaw plate 307, the moving jaw plate 307 is driven to swing above the connection center with the frame 1, and then the ore located between the moving jaw plate 307 and the fixed jaw plate 308 is crushed by jaw type extrusion. Because the jaw type crushing has a strong crushing effect, it can perform rough crushing on some very hard ores.

[0039] Furthermore, a fixed frame 304 is rotatably connected to the left connecting seat 305. The fixed frame 304 is installed on the frame 1 through bolts. A reset pull rod 309 is slidably connected inside the fixed frame 304. The right end of the reset pull rod 309 is rotatably connected to the bottom of the moving jaw plate 307. A reset spring 310 is sleeved on the surface of the reset pull rod 309. One end of the reset spring 310 is connected to the fixed frame 304, and the other end of the reset spring 310 is connected to the reset pull rod 309. The provided reset spring 310 will provide a leftward reset pulling force for the moving jaw plate 307. When the crushing is completed, the rotation of the eccentric shaft 302 will be utilized to indirectly drive the reset of the moving jaw plate 307. However, by the elastic stretching of the reset spring 310, the reset of the moving jaw plate 307 will be smoother.

[0040] In addition, the self-circulation component 4 includes a gear disk 401 fixed on the transmission wheel 301. A moving column 402 is arranged on the side surface of the gear disk 401. Tooth teeth are arranged on both the moving column 402 and the gear disk 401. A second tray 404 and a first tray 403 are mounted on the moving column 402 at different heights. The surfaces of the second tray 404 and the first tray 403 are both slidably connected to the bottom box 406. A fixing piece 405 is fixedly connected inside the bottom box 406, and the fixing piece 405 is located between the second tray 404 and the first tray 403. By the rotation of the transmission wheel 301, the rotation of the gear disk 401 is driven, and then the moving column 402 is driven to lift through the engagement of the tooth teeth. When the moving column 402 lifts, the first tray 403 and the second tray 404 will be driven to move upward. The ore that is still relatively large after crushing will roll or slide along the lower surface of the triangular frame 407 to above the first tray 403. Therefore, as the first tray 403 moves upward, the relatively large ore will be continuously lifted to the step position of the fixing piece 405. By using the process of double-layer lifting, some relatively large ore is automatically lifted again into the bottom box 406, so as to realize re-compression crushing again.

[0041] In addition, a triangular frame 407 is arranged below the fixed jaw plate 308 inside the bottom box 406. A filter groove is arranged on the triangular frame 407. The triangular frame 407 has a hollow structure, and a slope 4071 is arranged inside the triangular frame 407. The arranged slope 4071 can achieve the diversion effect of fine ore, and the filter groove is for screening and filtering the ore. The relatively large ore still remains on the upper surface of the triangular frame 407 and is diverted to the first trays 403 on both sides as the triangular frame 407 moves continuously, which is convenient for subsequent self-circulation re-compression of the ore.

[0042] It should be noted that the right end of the reset pull rod 309 is connected to a push rod 312, and the right end of the push rod 312 is connected to the triangular frame 407. The triangular frame 407 is slidably connected inside the bottom box 406. The left and right cyclic movements of the push rod 312 will drive the left and right jitter of the triangular frame 407 through the push rod 312, so as to screen and filter the crushed ore. When the reset pull rod 309 makes left and right cyclic movements along with the moving jaw plate 307, at this time, the reset pull rod 309 will drive the left and right cyclic movements of the triangular frame 407 through the connection of the push rod 312. The left and right cyclic movements of the triangular frame 407 will screen the ore located above the triangular frame 407 to prevent crushed stones from getting stuck above the triangular frame 407.

[0043] It should be noted that the screening device 5 includes a rotating rod 501 fixed on the eccentric shaft 302. A pull rod 502 is rotatably connected to the rotating rod 501. The bottom of the pull rod 502 is connected to a moving plate 512 through a support rod 503. One side of the moving plate 512 is slidably connected to a box seat 504, and the other side of the moving plate 512 is slidably connected to a material guiding frame 505. A dividing frame 508 is installed on the material guiding frame 505, and a discharge port 509 is formed inside the dividing frame 508. A swinging filter screen 507 is arranged above the material guiding frame 505. As the eccentric shaft 302 rotates, it will drive the rotating rod 501 to rotate, and then drive the pull rod 502 to move up and down cyclically. Through the connection of the support rod 503, the synchronous cyclic upward movement of the moving plate 512 is driven, and finally the cyclic shaking of the swinging filter screen 507 is realized. Moreover, when the moving plate 512 moves up, it will also drive the ore deposited above it to move up, and then move relative to the downward moving pressure swing arm 303, thereby realizing a relative extrusion action and improving the extrusion crushing effect. The left side of the swinging filter screen 507 is rotatably connected to the material guiding frame 505, the bottom of the right side of the swinging filter screen 507 abuts against a connecting piece 510, the right side of the connecting piece 510 is connected to the moving plate 512, the moving plate 512 is located below the pressure swing arm 303, and the bottom of the moving jaw plate 307 is connected with a plurality of pressing needles 3031. By using the plurality of pressing needles 3031 to insert into the internal frame wires, cracking and crushing are realized.

[0044] It is worth mentioning that a drainage plate 511 is rotatably connected to the box seat 504. Pulling pins 514 are connected to both sides of the drainage plate 511, and a lifting frame 513 is connected to the pulling pins 514. The lifting frame 513 is connected to the moving jaw plate 307 through a connecting shaft 311. An inclined surface 506 is formed inside the material guiding frame 505, and a discharge rack is arranged on one side of the material guiding frame 505. In order to prevent the ore from getting stuck, the drainage plate 511 is provided. Because after the ore is broken at this time, it presents an irregular shape, and some crushed stones cannot slide down according to the inclined surface. Therefore, by the squeezing swing of the moving jaw plate 307, the lifting frame 513 will be synchronously lifted. Then the lifting frame 513 will drive the pulling pin 514 to be lifted. So the drainage plate 511 connected to the pulling pin 514 will perform a small lifting action along with it, realizing cyclic shaking, so as to shake and move the ore located on the drainage plate 511 and avoid the situation of getting stuck.

[0045] Example 2: A multi-stage crushing and screening method for ore:

[0046] Step S1: Feeding, putting the ore to be crushed into the inner part of the bottom box 406 by using equipment or manually.

[0047] Step S2: Primary crushing. Through the rotation of the drive machine 2, the rotation of the eccentric shaft 302 is driven by the transmission of multiple belts, and then the up-and-down movement of the pressure swing arm 303 is driven. After that, through the movable connection between the right connecting seat 306 and the moving jaw plate 307, the moving jaw plate 307 is driven to swing around the upper connecting center, so as to perform jaw-type extrusion crushing on the ore located between the moving jaw plate 307 and the fixed jaw plate 308.

[0048] Step S3: Crushing cycle feeding. Through the rotation of the transmission wheel 301, the rotation of the gear disk 401 is driven. Then, the lifting of the moving column 402 is driven through the meshing of the teeth. When the moving column 402 is lifted, the first tray 403 and the second tray 404 will be driven to move upward. For the still relatively large ore after crushing, it will roll or slide along the lower part of the triangular frame 407 to the upper part of the first tray 403. Therefore, as the first tray 403 moves upward, the relatively large ore will be continuously lifted to the step position of the fixed piece 405. After that, when the teeth on the gear disk 401 are disengaged from the teeth on the moving column 402, at this time, the moving column 402 moves downward under the action of gravity to reset. After the second tray 404 moves downward to the height of the fixed piece 405, the ore located on the fixed piece 405 will roll onto the second tray 404. As the gear disk 401 continues to rotate, driving the first tray 403 and the second tray 404 to lift, at this time, the second tray 404 will drive the ore to continue to lift and move to a certain height, and then automatically fall into the space between the fixed jaw plate 308 and the moving jaw plate 307 again to achieve double-pressure crushing.

[0049] Step S4: Drainage and secondary crushing. The crushed small ore will enter the inside of the triangular frame 407 through the filter holes on it, slide from the position of the slope 4071 to the upper part of the box seat 504, and then slide along the inclined direction to the position of the dividing frame 508 for blocking. The finer ore will roll from the position of the discharge port 509 and fall onto the swing filter screen 507 to achieve filtration. When the pressure swing arm 303 swings up and down, it will perform downward pressure on the ore located below it for secondary crushing.

[0050] Step S5: Filtering and discharging. The ore after multiple crushings will be drained onto the swing filter screen 507 for filtration. Very fine gravel, soil blocks, and dust will fall to the position of the inclined surface 506 for discharge, and some ore will be discharged from the position of the discharge rack along the inclined direction of the swing filter screen 507.

[0051] All the electrical components mentioned in this article are electrically connected to the external main controller and 220V mains electricity, and the main controller can be a conventional known device such as a computer for control.

[0052] The working principle is as follows: first, the ore to be crushed is put into the bottom box 406 by equipment or manually. At this time, the ore will be located between the movable jaw plate 307 and the fixed jaw plate 308. Then, by starting the rotation of the driving machine 2, the eccentric shaft 302 is driven to rotate by the transmission of multiple belts. The eccentric shaft 302 is eccentrically connected to the pressure swing arm 303, so when the eccentric shaft 302 rotates eccentrically, it will drive the pressure swing arm 303 to swing eccentrically to achieve the up and down position movement. Then, through the active connection between the right connecting seat 306 and the movable jaw plate 307, the movable jaw plate 307 is driven to swing above the connection center with the frame 1, and then the ore located between the movable jaw plate 307 and the fixed jaw plate 308 is jaw-extruded and crushed. The crushed ore will enter the interior through the filter groove on the tripod 407, and the size of the filter hole can be designed according to the needs of the enterprise. The crushed stone will then slide from the slope 4071 to the top of the box seat 504, and then slide along the inclined direction to the position of the dividing frame 508 for blocking. Finer ore will roll down from the discharge port 509 and enter the swing filter 507 for filtration. When the pressure swing arm 303 swings up and down, it will press down on the ore below it and crush it again. Taking into account the instability of jaw crushing, a self-circulating component 4 is provided, because the jaw crushing product is prone to produce flake or long strip particles, the particle size distribution is relatively wide, and long strips and blocks still exist, but the jaw crusher has a relatively strong crushing effect, so the strong crushing effect is used to realize compound crushing, and the rotation of the transmission wheel 301 drives the rotation of the gear plate 401, and then drives the moving column 402 to be lifted through the meshing of the teeth. When the moving column 402 is lifted, it will drive the first tray 403 and the second tray 404 to move upward, and the larger ore after crushing will roll or slide along the bottom of the tripod 407 to the top of the first tray 403, so as the first tray 403 moves upward, the larger ore will continue to be lifted to the step position of the fixed plate 405, and the width of the fixed plate 405 is also The width is designed according to needs, and the top of the fixed plate 405 needs to be set to an inclined structure. After that, when the teeth on the gear plate 401 are disengaged from the teeth on the moving column 402, the moving column 402 is moved down and reset due to gravity. After that, when the second tray 404 moves down to the height of the fixed plate 405, the ore on the fixed plate 405 will roll onto the second tray 404. As the gear plate 401 continues to rotate, the first tray 403 and the second tray 404 are driven to rise. At this time, the second tray 404 will continue to lift and move the ore to a certain height, and then continue to automatically drop between the fixed jaw plate 308 and the moving jaw plate 307 to achieve re-compression crushing. The teeth on the gear plate 401 are residual teeth, not complete teeth, so it can only drive the moving column 402 to rise to a certain height. After the teeth are disengaged, it will automatically slide down and reset.Finally, the ore after multiple breakages will flow onto the swing filter screen 507 for filtration. Very fine crushed stones, soil blocks, and dust will fall to the position of the inclined plane 506 for discharge, while some ores will be discharged from the position of the discharge rack along the inclined direction of the swing filter screen 507. The entire swing filter screen 507 can also perform jitter filtration and screening. When the moving plate 512 moves upward, it will drive the swing filter screen 507 to move upward in contact through the connection of the connecting piece 510. At this time, the swing filter screen 507 will rotate slightly around the connection center at the left end. Then, with the rotation of the eccentric shaft 302, the rotating rod 501 will be driven to rotate, and then the pull rod 502 will be driven to move upward in a cycle. Through the connection of the support rod 503, the synchronous cyclic upward movement of the moving plate 512 is driven, and finally, the cyclic jitter of the swing filter screen 507 is achieved. Moreover, when the moving plate 512 moves upward, it will also drive the ore deposited above it to move upward, and then move relative to the downward moving pressure swing arm 303, thereby realizing a relative extrusion action, improving the extrusion crushing effect, and using multiple pressing needles 3031 to insert into the inner part of the frame wire to achieve cracking and crushing. To prevent the ore from jamming, a drainage plate 511 is provided. Since the ore is in an irregular shape after being broken at this time and some crushed stones cannot slide down along the inclined plane, the extrusion swing of the moving jaw plate 307 will synchronously drive the lifting frame 513 to lift. Then, the lifting frame 513 will drive the pull pin 514 to lift. Therefore, the drainage plate 511 connected to the pull pin 514 will perform a small lifting action, realizing cyclic jitter, so as to jitter and move the ore located on the drainage plate 511 and avoid jamming.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A multi-stage ore crushing and screening device, characterized in that, including a frame (1); a driving machine (2); a transmission and crushing assembly (3) for performing multi-stage crushing on ores; a self-circulation assembly (4) for self-circulating and conveying ores that are still relatively large after primary crushing to the inside of the transmission and crushing assembly (3) to achieve re-circulation crushing; a screening device (5) for classifying and screening the crushed ores; The transmission and crushing assembly (3) includes a transmission wheel (301). The transmission wheel (301) is connected to the output end of the driving machine (2) through a transmission member. An eccentric shaft (302) is installed at the center of the axis of the transmission wheel (301). A pressure swing arm (303) is connected to the surface of the eccentric shaft (302). A left connecting seat (305) and a right connecting seat (306) are respectively rotatably connected to both sides of the pressure swing arm (303). A moving jaw plate (307) is rotatably connected to the right connecting seat (306). The top of the moving jaw plate (307) is rotatably connected to the frame (1) through a shaft rod. A fixed jaw plate (308) is arranged on the right side of the moving jaw plate (307). The fixed jaw plate (308) is installed on the frame (1); The cyclic movement of the moving jaw plate (307) cooperates with the extrusion of the fixed jaw plate (308) to achieve primary crushing of the ores; The cyclic downward pressure of the pressure swing arm (303) can re-crush the ores crushed by the moving jaw plate (307).

2. The multi-stage crushing and screening device for ore according to claim 1, characterized in that: A fixed frame (304) is rotatably connected to the left connecting seat (305). The fixed frame (304) is installed on the frame (1) through bolts. A reset pull rod (309) is slidably connected inside the fixed frame (304). The right end of the reset pull rod (309) is rotatably connected to the bottom of the moving jaw plate (307). A reset spring (310) is sleeved on the surface of the reset pull rod (309). One end of the reset spring (310) is connected to the fixed frame (304), and the other end of the reset spring (310) is connected to the reset pull rod (309).

3. An ore multi-stage crushing and screening device according to claim 2, characterized in that: The self-circulation assembly (4) includes a gear disk (401). The gear disk (401) is fixed on the transmission wheel (301). A moving column (402) is arranged on the side of the gear disk (401). Both the moving column (402) and the gear disk (401) are provided with teeth. A second tray (404) and a first tray (403) are installed on the moving column (402) at different heights. The surfaces of the second tray (404) and the first tray (403) are slidably connected to the bottom box (406). A fixed piece (405) is fixedly connected inside the bottom box (406). The fixed piece (405) is located between the second tray (404) and the first tray (403).

4. An ore multi-stage crushing and screening device according to claim 3, characterized in that: A triangular frame (407) is arranged inside the bottom box (406) below the fixed jaw plate (308). A filter groove is arranged on the triangular frame (407). The triangular frame (407) has a hollow structure. A slope (4071) is arranged inside the triangular frame (407).

5. An ore multi-stage crushing and screening device according to claim 4, characterized in that: The right end of the reset pull rod (309) is connected to a push rod (312). The right end of the push rod (312) is connected to a tripod (407). The tripod (407) is slidably connected within a bottom box (406). The left-right cyclic movement of the push rod (312) will drive the left-right jitter of the tripod (407) through the push rod (312), realizing the screening, filtering, and crushing of ores.

6. The multi-stage crushing and screening device for ore according to claim 1, characterized in that: The screening device (5) includes a rotating rod (501). The rotating rod (501) is fixed on an eccentric shaft (302). A pull rod (502) is rotatably connected to the rotating rod (501). The bottom of the pull rod (502) is connected to a moving plate (512) through a support rod (503). One side of the moving plate (512) is slidably connected to a box base (504). The other side of the moving plate (512) is slidably connected to a material guiding frame (505). A dividing frame (508) is installed on the material guiding frame (505). A discharge port (509) is formed within the dividing frame (508). A swinging filter screen (507) is disposed above the material guiding frame (505).

7. An ore multi-stage crushing and screening device according to claim 6, characterized in that: The left side of the swinging filter screen (507) is rotatably connected to the material guiding frame (505). The right bottom of the swinging filter screen (507) abuts against a connecting piece (510). The right side of the connecting piece (510) is connected to the moving plate (512). The moving plate (512) is located below the pressure swing arm (303). The bottom of the moving jaw plate (307) is connected to a plurality of pressing pins (3031).

8. An ore multi-stage crushing and screening device according to claim 7, characterized in that: A drainage plate (511) is rotatably connected to the box base (504). Pulling pins (514) are connected to both sides of the drainage plate (511). A lifting frame (513) is connected to the pulling pins (514). The lifting frame (513) is connected to the moving jaw plate (307) through a connecting shaft (311).

9. An ore multi-stage crushing and screening device according to claim 8, characterized in that: An inclined surface (506) is formed inside the material guiding frame (505). A discharge rack is disposed on one side of the material guiding frame (505).

10. A multi-stage crushing and screening method for ore, characterized in that, Including any one of the ore multi-stage crushing and screening devices described in claims 1-9, the following steps are further included: Step S1: Feeding. The ores to be crushed are fed into the interior of the bottom box (406) using equipment or manually. Step S2: Primary crushing. Through the rotation of the driving machine (2), the rotation of the eccentric shaft (302) is driven by the transmission of multiple belts, thereby driving the up-and-down movement of the pressure swing arm (303). Then, through the movable connection between the right connecting seat (306) and the moving jaw plate (307), the moving jaw plate (307) is driven to swing around the upper connection center, thereby performing jaw-type extrusion crushing on the ores located between the moving jaw plate (307) and the fixed jaw plate (308). Step S3: Crushing and recycling feeding. The rotation of the driving wheel (301) drives the rotation of the gear disk (401). Then, through the meshing of the teeth, the moving column (402) is driven to lift. When the moving column (402) lifts, it will drive the upward movement of the first tray (403) and the second tray (404). The still relatively large ore after crushing will roll or slide along the bottom of the triangular frame (407) to above the first tray (403). Therefore, as the first tray (403) moves upward, the relatively large ore will be continuously lifted to the step position of the fixed piece (405). After that, when the teeth on the gear disk (401) disengage from the teeth on the moving column (402), at this time, the moving column (402) moves downward under gravity to reset. After the second tray (404) moves downward to the height of the fixed piece (405), the ore on the fixed piece (405) will roll onto the second tray (404). As the gear disk (401) continues to rotate, driving the upward movement of the first tray (403) and the second tray (404), at this time, the second tray (404) will carry the ore and continue to lift and move to a certain height, and then automatically fall again between the fixed jaw plate (308) and the moving jaw plate (307) to achieve secondary crushing; Step S4: Drainage and secondary crushing. The crushed small ore will enter its interior through the filter holes on the triangular frame (407), slide from the position of the slope (4071) above the box seat (504), and then slide along the inclined direction to the position of the dividing frame (508) for blocking. The finer ore will roll from the position of the discharge port (509) onto the swinging filter screen (507) to achieve filtration. When the pressure swing arm (303) swings up and down, it will crush the ore located below it in a downward pressing manner again; Step S5: Filtration and discharging. The ore after multiple crushings will be drained onto the swinging filter screen (507) for filtration. Very fine gravel, soil blocks, and dust will fall to the position of the inclined surface (506) for discharge, and some ore will be discharged from the position of the discharge rack along the inclined direction of the swinging filter screen (507).

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