A multi-stage ore dressing machine anti-blocking material feeding device

Abstract

The present invention discloses a multi-stage anti-blocking feeding device for a mineral processing machine, which relates to the technical field of anti-blocking feeding devices for mineral processing machines, and comprises a base, wherein the upper end of the base is fixedly connected to a sorting box and a mounting plate via a bracket; a screening mechanism, wherein the screening mechanism comprises a first screening plate slidably connected to the inner wall of the sorting box, wherein both ends of the first screening plate pass through the side walls of the sorting box, a plurality of screening holes are provided on the upper end of the first screening plate, and the plurality of screening holes are all provided through the first screening plate, the lower end of the mounting plate is rotatably connected to a first rotating shaft, the side wall of the first rotating shaft is fixedly connected to a plurality of first crushing knives, the side wall of the first rotating shaft is fixedly connected to a fixed rod, and the lower end of the fixed rod is rotatably connected to a second rotating shaft. The driving motor in the present invention can crush and screen the ore, and the crushed and screened ore will be transported to the mineral processing machine through a conveying device, thereby preventing the ore from being too large and blocking the mineral processing machine.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-blocking feeding devices for ore dressing machines, and in particular to an anti-blocking feeding device for a multi-stage ore dressing machine. Background Art

[0002] A concentrator, also known as an ore separator, is a specialized piece of equipment used in mining and mineral processing to separate valuable minerals from waste or low-grade ores based on their inherent properties.

[0003] When using existing mineral processing machines, ore is usually directly fed into the mineral processing machine for separation. However, the mined ores vary in size. Some larger ores are directly fed into the mineral processing machine, which can easily cause blockage in the feed port, resulting in the mineral processing machine being unable to continue feeding and affecting the working efficiency of the mineral processing machine. Based on this, we propose a multi-stage mineral processing machine anti-blocking feeding device. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multi-stage ore dressing machine anti-blocking material feeding device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-stage ore dressing machine anti-blocking material feeding device comprises a base, the upper end of which is fixedly connected to a sorting box and a mounting plate via a bracket;

[0007] The cam is fixedly provided with a first end in contact with the first end of the first rotating shaft, and the cam is fixedly provided with a first end in contact with the first end of the first rotating shaft, and the cam is fixedly provided with a second end in contact with the cam.

[0008] Preferably, a driving mechanism is installed on the mounting plate, and the driving mechanism includes a rotating rod rotatably connected to the lower end of the mounting plate, a disc is fixedly connected to the lower end of the rotating rod, a first pin is eccentrically fixedly connected to the lower end of the disc, a driving rod is rotatably connected to the side wall of the first pin, a second pin is fixedly connected to the upper end of the first screening plate, and the other end of the driving rod is rotatably connected to the second pin.

[0009] Preferably, the driving mechanism further comprises a motor fixedly connected to the upper end of the mounting plate, and the output end of the motor passes through the upper end of the mounting plate and is fixedly connected to the rotating rod.

[0010] Preferably, a power mechanism is installed on the rotating rod, and the power mechanism includes a driving wheel fixedly connected to the side wall of the rotating rod, a driven wheel fixedly connected to the side wall of the first rotating shaft, the driving wheel is connected to the driven wheel through a synchronous belt, the side wall of the second rotating shaft is fixedly connected to a gear, and the upper end of the sorting box is fixedly connected to a gear ring through a bracket, and the gear is meshed with the gear ring.

[0011] Preferably, a volume control mechanism is installed on the second rotating shaft, and the volume control mechanism includes a vertical groove opened at the upper end of the second rotating shaft, a magnetic rod is slidably connected to the inner wall of the vertical groove, a resistance wheel is fixedly connected to the upper end of the magnetic rod, a second spring is fixedly connected between the bottom of the vertical groove and the magnetic rod, and an electromagnet is fixedly connected to the bottom of the vertical groove.

[0012] Preferably, the volume control mechanism also includes a control box fixedly connected to the upper end of the mounting plate, the inner wall of the control box is sealed and slidably connected with a conductive slider, a third spring is fixedly connected between the inner wall of the control box and the conductive slider, a resistor bar is fixedly embedded in the inner wall of the control box, an infrared sensor is installed on the inner wall of the screening hole, and the electromagnet, conductive slider, resistor bar, infrared sensor and external control switch are connected through a PLC control circuit.

[0013] Preferably, a pushing mechanism for driving the conductive slider to move is installed on the arc-shaped cylinder, and the pushing mechanism includes a one-way air inlet pipe fixedly connected to the inner wall of the arc-shaped cylinder. The arc-shaped cylinder is connected to the control box through a one-way exhaust pipe, and an exhaust hole is opened on the inner wall of the control box.

[0014] Preferably, the diameter of the exhaust hole is smaller than the inner diameter of the one-way exhaust pipe.

[0015] Preferably, a conveying device for conveying ore is installed on the base.

[0016] The present invention has the following beneficial effects:

[0017] 1. By setting up the screening mechanism and driving mechanism and driving the motor, the ore can be crushed and screened. The crushed and screened ore will be transported to the concentrator through the conveying device, thus avoiding the clogging of the concentrator by the ore being too large;

[0018] 2. By setting up a power mechanism, the rotation of the first rotating shaft will synchronously drive the rotation of the fixed rod, and then drive the second rotating shaft to rotate around the center of the first rotating shaft, driving the multiple second crushing knives to move in a circular motion. Moreover, since the gear is meshed with the gear ring, the gear ring can make the gear rotate, and then drive the second rotating shaft to rotate, driving the multiple second crushing knives to rotate synchronously, which can increase the crushing range and evenly crush the ore at various positions in the sorting box, so that the volume of the crushed ore is kept as uniform as possible;

[0019] 3. By setting up the volume control mechanism and the pushing mechanism, the crushing effect can be automatically adjusted according to the volume of the ore after crushing and screening, and the volume of the crushed ore can be effectively controlled within a certain range, so that the volume of the ore input into the concentrator remains uniform;

[0020] 4. When the volume of the crushed ore is too large to pass through the screening hole, the infrared sensor cannot sense that there is ore falling in the screening hole, and it will send a signal to disconnect the control switch, so that the electromagnet cannot be energized, so that the resistance wheel and the driven wheel are separated, and no mutual friction is generated to reduce the rotation speed. At this time, the first crushing knife and the second crushing knife will rotate at the fastest speed, and the crushing efficiency of the ore will be the highest. When the volume of the crushed ore is smaller than the space formed by the four second screening plates when it enters the screening hole, the ore cannot squeeze the second screening plates when it falls, and thus cannot be crushed. The method makes the conductive slider unable to move and is located at the position where the resistance bar is connected to the circuit with the smallest resistance. At this time, the infrared sensor can sense that ore has fallen in the screening hole, and the control switch will be closed. At this time, the current flowing into the electromagnet is the largest, and the magnetic repulsion generated is the strongest, so that the dynamic friction between the resistance wheel and the driven wheel is the largest, and the speed of the driven wheel and the second rotating shaft is at the slowest state, which reduces the crushing efficiency of the first crushing knife and the second crushing knife to the lowest, thereby preventing the ore from being crushed too small. Therefore, it can be automatically adjusted to prevent the volume of the ore after crushing from being too large or too small. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a multi-stage ore dressing machine anti-blocking material feeding device proposed by the present invention;

[0022] Figure 2 for Figure 1 Rear view schematic diagram of the mid-structure;

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the middle sorting box;

[0024] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the first screening plate;

[0025] Figure 5 for Figure 3 A schematic diagram of the structure enlargement at point A;

[0026] Figure 6 for Figure 3 A magnified schematic diagram of the structure at point B in FIG.

[0027] Figure 7 for Figure 4 A magnified schematic diagram of the structure at position C in FIG;

[0028] Figure 8 This is a schematic diagram of the circuit connections of the infrared sensor, conductive slider, resistor bar, and electromagnet.

[0029] In the figure: 1. base; 2. sorting box; 3. mounting plate; 4. first screening plate; 5. screening hole; 6. first rotating shaft; 7. first crushing knife; 8. fixing rod; 9. second crushing knife; 10. mounting block; 11. second screening plate; 12. arc cylinder; 13. arc rod; 14. first spring; 15. rotating rod; 16. disc; 17. first pin; 18. driving rod; 19. second pin; 20. motor; 21. driving wheel; 22. driven wheel; 23. gear; 24. gear ring; 25. second rotating shaft; 26. vertical slot; 27. magnetic rod; 28. resistance wheel; 29. ​​second spring; 30. electromagnet; 31. control box; 32. conductive slider; 33. third spring; 34. resistor bar; 35. exhaust hole; 36. one-way air inlet pipe; 37. one-way exhaust pipe; 38. infrared sensor; 39. conveying device. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Reference Figures 1-8 A multi-stage ore dressing machine anti-blocking material feeding device includes a base 1, the upper end of the base 1 is fixedly connected to a sorting box 2 and a mounting plate 3 through a bracket, and a conveying device 39 for conveying ore is installed on the base 1;

[0032] The screening mechanism includes a first screening plate 4 slidingly connected to the inner wall of the sorting box 2, and the two ends of the first screening plate 4 are arranged through the side walls of the sorting box 2. A plurality of screening holes 5 are opened on the upper end of the first screening plate 4, and the plurality of screening holes 5 are all arranged through the first screening plate 4. The lower end of the mounting plate 3 is rotatably connected to the first rotating shaft 6, and the side wall of the first rotating shaft 6 is fixedly connected to a plurality of first crushing knives 7. The side wall of the first rotating shaft 6 is fixedly connected to a fixing rod 8, and the lower end of the fixing rod 8 is rotatably connected to the second rotating shaft 25. The side wall of the second rotating shaft 25 is fixedly connected to a plurality of second crushing knives 9. The lower end of the first screening plate 4 is fixedly connected to a plurality of mounting blocks 10, wherein the two mounting blocks 10 on the same side are rotatably connected to the second screening plate 11 on their adjacent side walls. The lower end of the first screening plate 4 is fixedly connected to a plurality of arc cylinders 12, and the inner wall of each arc cylinder 12 is sealed and slidably connected to an arc rod 13. The other end of the arc rod 13 is fixedly connected to the lower end of the second screening plate 11, and a first spring 14 is fixedly connected between the inner wall of the arc cylinder 12 and the arc rod 13.

[0033] A driving mechanism is installed on the mounting plate 3, and the driving mechanism includes a rotating rod 15 rotatably connected to the lower end of the mounting plate 3, a disc 16 is fixedly connected to the lower end of the rotating rod 15, a first pin 17 is eccentrically fixedly connected to the lower end of the disc 16, a driving rod 18 is rotatably connected to the side wall of the first pin 17, a second pin 19 is fixedly connected to the upper end of the first screening plate 4, and the other end of the driving rod 18 is rotatably connected to the second pin 19.

[0034] The driving mechanism further includes a motor 20 fixedly connected to the upper end of the mounting plate 3 , and an output end of the motor 20 passes through the upper end of the mounting plate 3 and is fixedly connected to the rotating rod 15 .

[0035] A power mechanism is installed on the rotating rod 15, which includes a driving wheel 21 fixedly connected to the side wall of the rotating rod 15, a driven wheel 22 fixedly connected to the side wall of the first rotating shaft 6, the driving wheel 21 is connected to the driven wheel 22 through a synchronous belt, a gear 23 is fixedly connected to the side wall of the second rotating shaft 25, and a gear ring 24 is fixedly connected to the upper end of the sorting box 2 through a bracket, and the gear 23 is meshed with the gear ring 24.

[0036] Furthermore, the ore is placed into the sorting box 2, and then the motor 20 is started to drive the rotating rod 15 to rotate, and then the driving wheel 21 is driven to rotate, thereby driving the driven wheel 22 to rotate, driving the first rotating shaft 6 to rotate, and driving multiple first crushing knives 7 to rotate, to crush the ore in the sorting box 2 until the crushed ore can fall through the screening hole 5 and fall onto the conveying device 39, and then the conveying device 39 is transported to the ore dressing machine, which can avoid the ore being too large to block the ore dressing machine, and the rotating rod 15 will synchronously drive the disc 16 to rotate, drive the first pin shaft 17 to rotate eccentrically, and the first pin shaft 17 will drive the first screening plate 4 to reciprocate through the driving rod 18, which can quickly screen the crushed ore so that it can quickly fall through the screening hole 5, thereby improving the screening efficiency.

[0037] Furthermore, the rotation of the first rotating shaft 6 will synchronously drive the fixed rod 8 to rotate, and then drive the second rotating shaft 25 to rotate with the center of the first rotating shaft 6 as the center, driving multiple second crushing knives 9 to move in a circular motion, and because the gear 23 is engaged with the gear ring 24, the gear ring 24 can make the gear 23 rotate, and then drive the second rotating shaft 25 to rotate, and drive multiple second crushing knives 9 to rotate synchronously, which can increase the crushing range and evenly crush the ore at various positions in the sorting box 2, so that the volume of the crushed ore is kept as uniform as possible.

[0038] A volume control mechanism is installed on the second rotating shaft 25, and the volume control mechanism includes a vertical slot 26 opened at the upper end of the second rotating shaft 25, a magnetic rod 27 is slidably connected to the inner wall of the vertical slot 26, a resistance wheel 28 is fixedly connected to the upper end of the magnetic rod 27, a second spring 29 is fixedly connected between the bottom of the vertical slot 26 and the magnetic rod 27, and an electromagnet 30 is fixedly connected to the bottom of the vertical slot 26.

[0039] The volume control mechanism also includes a control box 31 fixedly connected to the upper end of the mounting plate 3, the inner wall of the control box 31 is sealed and slidably connected to a conductive slider 32, a third spring 33 is fixedly connected between the inner wall of the control box 31 and the conductive slider 32, a resistor bar 34 is fixedly embedded in the inner wall of the control box 31, an infrared sensor 38 is installed on the inner wall of the screening hole 5, and the electromagnet 30, the conductive slider 32, the resistor bar 34, the infrared sensor 38 and the external control switch are connected through a PLC control circuit.

[0040] A driving mechanism for driving the conductive slider 32 to move is installed on the curved cylinder 12. The driving mechanism includes a one-way air inlet pipe 36 fixedly connected to the inner wall of the curved cylinder 12. The one-way air inlet pipe 36 only allows external air to enter the curved cylinder 12. The curved cylinder 12 is connected to the control box 31 through a one-way exhaust pipe 37. The one-way exhaust pipe 37 only allows the air in the curved cylinder 12 to enter the control box 31. The one-way exhaust pipe 37 is made of a hose. An exhaust hole 35 is opened on the inner wall of the control box 31. The aperture of the exhaust hole 35 is much smaller than the inner diameter of the one-way exhaust pipe 37.

[0041] Furthermore, when the ore is crushed, the ore near the bottom layer in the sorting box 2 will drop through the screening holes 5 first, and the ore in the upper layer can only drop through the screening holes 5 after the ore in the bottom layer has dropped. Therefore, the crushing time of the ore in the upper layer will be longer than that of the bottom layer. Therefore, the volume of the ore after crushing will be smaller as it goes up, resulting in uneven volume of the transported ore. Since four inclined second screening plates 11 are provided under each screening hole 5, a space for dropping will be formed between the lower ends of the four second screening plates 11. Therefore, when the ore drops through the screening hole 5, If its size is between the diameter of the screening hole 5 and the space for falling formed by the four second screening plates 11, when the ore falls, it will squeeze the second screening plates 11, causing the second screening plates 11 to rotate and expand outward, and then the second screening plates 11 will drive the arc rods 13 to move, so that the air in the arc cylinder 12 will enter the control box 31 through the one-way exhaust pipe 37. Since the diameter of the one-way exhaust pipe 37 is much larger than the diameter of the exhaust hole 35, the air intake speed in the control box 31 is greater than the exhaust speed, so it will push the conductive slider 32 to slide to the right in the control box 31 (as shown in the figure). Figure 6 As shown), the resistance of the resistor bar 34 connected to the circuit will be smaller, so when the volume of the crushed ore is larger, the rotation amplitude of the second screening plate 11 will be larger when it falls through the screening hole 5, so that more air will be pumped into the control box 31, the position of the conductive slider 32 will be closer to the right, and the resistance connected to the circuit will be larger. Since an infrared sensor 38 is provided in the screening hole 5, the infrared sensor 38 will send a signal when it senses that ore has fallen in the screening hole 5, and the control switch is turned on through the PLC control circuit, so that the circuit of the electromagnet 30 is connected (as shown). Figure 8 As shown), the electromagnet 30 will be energized to generate magnetic repulsion, pushing the magnetic rod 27 to move upward, thereby driving the resistance wheel 28 to resist the lower end of the driven wheel 22, and the rotation directions of the resistance wheel 28 and the driven wheel 22 are opposite, so the resistance wheel 28 will generate dynamic friction with the driven wheel 22, which can reduce the speed of the driven wheel 22 and the second rotating shaft 25. When the volume of the ore is larger, the current passed through the electromagnet 30 will be smaller, and the magnetic repulsion generated will be smaller, and the pressure exerted by the resistance wheel 28 on the driven wheel 22 will be smaller. , and the smaller the dynamic friction force will be, the faster the rotation speed of the driven wheel 22 and the second rotating shaft 25 will be, so the rotation speed of the first crushing knife 7 and the second crushing knife 9 will be faster, thereby improving the crushing effect and reducing the volume of the crushed ore accordingly. On the contrary, if the volume of the ore entering the screening hole 5 is smaller, the rotation speed of the first crushing knife 7 and the second crushing knife 9 will be slower, reducing the crushing effect and increasing the volume of the crushed ore. As a result, the volume of the crushed ore can be controlled within a certain range so that it will not be too large or too small and can be kept as uniform as possible.

[0042] It is worth mentioning that when the volume of the crushed ore is too large to pass through the screening hole 5, the infrared sensor 38 cannot sense that there is ore falling in the screening hole 5, and will send a signal to disconnect the control switch, so that the electromagnet 30 cannot be energized, so that the resistance wheel 28 and the driven wheel 22 are separated, and no mutual friction is generated to reduce the rotation speed. At this time, the first crushing knife 7 and the second crushing knife 9 will rotate at the fastest speed, and the crushing efficiency of the ore will be the highest. When the volume of the crushed ore is smaller than the space for falling formed by the four second screening plates 11 when entering the screening hole 5, the ore cannot squeeze the second screening plates 11 when it falls, and then The conductive slider 32 cannot be made immobile, and the resistor bar 34 is connected to the position with the lowest resistance in the circuit. At this time, the infrared sensor 38 can sense that ore has fallen into the screening hole 5, and the control switch will be closed. At this time, the current flowing into the electromagnet 30 is the largest, and the magnetic repulsion generated is the strongest, so that the dynamic friction between the resistance wheel 28 and the driven wheel 22 is the largest, and the rotation speed of the driven wheel 22 and the second rotating shaft 25 is in the slowest state, so that the crushing efficiency of the first crushing knife 7 and the second crushing knife 9 is reduced to the lowest, thereby preventing the ore from being crushed too small. Therefore, it can be automatically adjusted to prevent the volume of the ore after crushing from being too large or too small.

[0043] In the present invention, the ore is placed in the sorting box 2, and then the motor 20 is started to drive the rotating rod 15 to rotate, and then drive the driving wheel 21 to rotate, thereby driving the driven wheel 22 to rotate, driving the first rotating shaft 6 to rotate, and driving multiple first crushing knives 7 to rotate, to crush the ore in the sorting box 2 until the crushed ore can fall through the screening hole 5 and fall onto the conveying device 39, and then be transported to the ore dressing machine by the conveying device 39, which can avoid the ore being too large to block the ore dressing machine, and the rotating rod 15 will synchronously drive the disc 16 to rotate, drive the first pin shaft 17 to rotate eccentrically, and the first pin shaft 17 will drive the first screening plate 4 to reciprocate through the driving rod 18, which can quickly screen the crushed ore so that it can quickly fall through the screening hole 5, thereby improving the screening efficiency.

[0044] In addition, the rotation of the first rotating shaft 6 will synchronously drive the fixed rod 8 to rotate, and then drive the second rotating shaft 25 to rotate with the center of the first rotating shaft 6 as the center, driving multiple second crushing knives 9 to move in a circular motion, and because the gear 23 is engaged with the gear ring 24, the gear ring 24 can make the gear 23 rotate, and then drive the second rotating shaft 25 to rotate, and drive multiple second crushing knives 9 to rotate synchronously, which can increase the crushing range and evenly crush the ore at various positions in the sorting box 2, so that the volume of the crushed ore is kept as uniform as possible.

[0045] When the ore is crushed, the ore near the bottom layer in the sorting box 2 will first fall through the screening holes 5, and the ore in the upper layer can only fall through the screening holes 5 after the ore in the bottom layer falls. Therefore, the crushing time of the ore in the upper layer will be longer than that of the bottom layer. Therefore, the volume of the ore after crushing will be smaller as you move up the layer, resulting in uneven volume of the ore being transported. Since four inclined second screening plates 11 are provided under each screening hole 5, a space for falling will be formed between the lower ends of the four second screening plates 11. Therefore, when the ore falls through the screening hole 5, if Its size is between the diameter of the screening hole 5 and the space for falling formed by the four second screening plates 11. When the ore falls, it will squeeze the second screening plates 11, causing the second screening plates 11 to rotate and expand outward, and then the second screening plates 11 will drive the arc rod 13 to move, so that the air in the arc cylinder 12 will enter the control box 31 through the one-way exhaust pipe 37. Since the diameter of the one-way exhaust pipe 37 is larger than the diameter of the exhaust hole 35, the air intake speed in the control box 31 is greater than the exhaust speed, so it will push the conductive slider 32 to slide to the right in the control box 31 (as shown in the figure). Figure 6 As shown), the resistance of the resistor bar 34 connected to the circuit will be smaller, so when the volume of the crushed ore is larger, the rotation amplitude of the second screening plate 11 will be larger when it falls through the screening hole 5, so that more air will be pumped into the control box 31, the position of the conductive slider 32 will be closer to the right, and the resistance connected to the circuit will be larger. Since an infrared sensor 38 is provided in the screening hole 5, the infrared sensor 38 will send a signal when it senses that ore has fallen in the screening hole 5, and the control switch is turned on through the PLC control circuit, so that the circuit of the electromagnet 30 is connected (as shown). Figure 8 As shown), the electromagnet 30 will be energized to generate magnetic repulsion, pushing the magnetic rod 27 to move upward, thereby driving the resistance wheel 28 to resist the lower end of the driven wheel 22, and the rotation directions of the resistance wheel 28 and the driven wheel 22 are opposite, so the resistance wheel 28 will generate dynamic friction with the driven wheel 22, which can reduce the speed of the driven wheel 22 and the second rotating shaft 25. When the volume of the ore is larger, the current passed through the electromagnet 30 will be smaller, and the magnetic repulsion generated will be smaller, and the pressure exerted by the resistance wheel 28 on the driven wheel 22 will be smaller. , and the smaller the dynamic friction force will be, the faster the rotation speed of the driven wheel 22 and the second rotating shaft 25 will be, so the rotation speed of the first crushing knife 7 and the second crushing knife 9 will be faster, thereby improving the crushing effect and reducing the volume of the crushed ore accordingly. On the contrary, if the volume of the ore entering the screening hole 5 is smaller, the rotation speed of the first crushing knife 7 and the second crushing knife 9 will be slower, reducing the crushing effect and increasing the volume of the crushed ore. As a result, the volume of the crushed ore can be controlled within a certain range so that it will not be too large or too small and can be kept as uniform as possible.

[0046] When the volume of the crushed ore is too large to pass through the screening hole 5, the infrared sensor 38 cannot sense that there is ore falling in the screening hole 5, and will send a signal to disconnect the control switch, so that the electromagnet 30 cannot be energized, so that the resistance wheel 28 and the driven wheel 22 are separated, and no mutual friction is generated to reduce the rotation speed. At this time, the first crushing knife 7 and the second crushing knife 9 will rotate at the fastest speed, and the crushing efficiency of the ore will be the highest. When the volume of the crushed ore is smaller than the space for falling formed by the four second screening plates 11 when entering the screening hole 5, the ore cannot squeeze the second screening plates 11 when it falls, and thus cannot be crushed. The conductive slider 32 cannot move and is located at the position where the resistance bar 34 is connected to the circuit with the lowest resistance. At this time, the infrared sensor 38 can sense that ore has fallen into the screening hole 5, and the control switch will be closed. At this time, the current flowing into the electromagnet 30 is the largest, and the magnetic repulsion generated is the strongest, so that the dynamic friction between the resistance wheel 28 and the driven wheel 22 is the largest, and the rotation speed of the driven wheel 22 and the second rotating shaft 25 is at the slowest state, so that the crushing efficiency of the first crushing knife 7 and the second crushing knife 9 is reduced to the lowest, thereby preventing the ore from being crushed too small. Therefore, it can be automatically adjusted to prevent the volume of the ore after crushing from being too large or too small.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-stage ore dressing machine anti-blocking material feeding device, characterized in that: include: A base (1), the upper end of the base (1) being fixedly connected to a sorting box (2) and a mounting plate (3) via a bracket; The screening mechanism comprises a first screening plate (4) slidably connected to the inner wall of the sorting box (2), the two ends of the first screening plate (4) pass through the side wall of the sorting box (2), the upper end of the first screening plate (4) is provided with a plurality of screening holes (5), and the plurality of screening holes (5) are all provided through the first screening plate (4), the lower end of the mounting plate (3) is rotatably connected to a first rotating shaft (6), the side wall of the first rotating shaft (6) is fixedly connected to a plurality of first crushing knives (7), the side wall of the first rotating shaft (6) is fixedly connected to a fixing rod (8), the lower end of the fixing rod (8) is rotatably connected to a second rotating shaft (25), and the second rotating shaft ( 25) A plurality of second crushing knives (9) are fixedly connected to the side wall, a plurality of mounting blocks (10) are fixedly connected to the lower end of the first screening plate (4), wherein the side walls of two mounting blocks (10) located on the same side are close to each other and are rotatably connected to the second screening plate (11), a plurality of arc cylinders (12) are fixedly connected to the lower end of the first screening plate (4), and an arc rod (13) is sealingly and slidably connected to the inner wall of each arc cylinder (12), and the other end of the arc rod (13) is fixedly connected to the lower end of the second screening plate (11), and a first spring (14) is fixedly connected between the inner wall of the arc cylinder (12) and the arc rod (13).

2. A multi-stage ore dressing machine anti-blocking material feeding device according to claim 1, characterized in that: in: A driving mechanism is mounted on the mounting plate (3), and the driving mechanism comprises a rotating rod (15) rotatably connected to the lower end of the mounting plate (3); a disc (16) is fixedly connected to the lower end of the rotating rod (15); a first pin (17) is eccentrically fixedly connected to the lower end of the disc (16); a driving rod (18) is rotatably connected to the side wall of the first pin (17); a second pin (19) is fixedly connected to the upper end of the first screening plate (4); and the other end of the driving rod (18) is rotatably connected to the second pin (19).

3. A multi-stage ore dressing machine anti-blocking material feeding device according to claim 2, characterized in that: in: The driving mechanism further comprises a motor (20) fixedly connected to the upper end of the mounting plate (3), wherein the output end of the motor (20) passes through the upper end of the mounting plate (3) and is fixedly connected to the rotating rod (15).

4. A multi-stage ore dressing machine anti-blocking material feeding device according to claim 2, characterized in that: in: A power mechanism is installed on the rotating rod (15), and the power mechanism includes a driving wheel (21) fixedly connected to the side wall of the rotating rod (15), a driven wheel (22) fixedly connected to the side wall of the first rotating shaft (6), the driving wheel (21) is connected to the driven wheel (22) through a synchronous belt, a gear (23) is fixedly connected to the side wall of the second rotating shaft (25), and the upper end of the sorting box (2) is fixedly connected to a gear ring (24) through a bracket, and the gear (23) is meshed with the gear ring (24).

5. The anti-blocking material feeding device for a multi-stage ore dressing machine according to claim 1, characterized in that: in: A volume control mechanism is installed on the second rotating shaft (25), and the volume control mechanism includes a vertical slot (26) opened at the upper end of the second rotating shaft (25), a magnetic rod (27) is slidably connected to the inner wall of the vertical slot (26), a resistance wheel (28) is fixedly connected to the upper end of the magnetic rod (27), a second spring (29) is fixedly connected between the bottom of the vertical slot (26) and the magnetic rod (27), and an electromagnet (30) is fixedly connected to the bottom of the vertical slot (26).

6. A multi-stage ore dressing machine anti-blocking material feeding device according to claim 5, characterized in that: in: The volume control mechanism further comprises a control box (31) fixedly connected to the upper end of the mounting plate (3); the inner wall of the control box (31) is sealed and slidably connected to a conductive slider (32); a third spring (33) is fixedly connected between the inner wall of the control box (31) and the conductive slider (32); a resistor bar (34) is fixedly embedded in the inner wall of the control box (31); an infrared sensor (38) is installed on the inner wall of the screening hole (5); and the electromagnet (30), the conductive slider (32), the resistor bar (34), the infrared sensor (38) and the external control switch are connected via a PLC control circuit.

7. The anti-blocking material feeding device for a multi-stage ore dressing machine according to claim 6, characterized in that: in: The arc-shaped cylinder (12) is provided with a driving mechanism for driving the conductive slider (32) to move. The driving mechanism includes a one-way air inlet pipe (36) fixedly connected to the inner wall of the arc-shaped cylinder (12). The arc-shaped cylinder (12) is connected to the control box (31) through a one-way exhaust pipe (37). The inner wall of the control box (31) is provided with an exhaust hole (35).

8. The anti-blocking material feeding device for a multi-stage ore dressing machine according to claim 7, characterized in that: in: The diameter of the exhaust hole (35) is smaller than the inner diameter of the one-way exhaust pipe (37).

9. The anti-blocking material feeding device for a multi-stage ore dressing machine according to claim 1, characterized in that: in: A conveying device (39) for conveying ore is installed on the base (1).

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