A pair-roll crusher for mining

Abstract

The present invention relates to the technical field of crushers, and discloses a mining double-roll crusher, which includes a casing, and further includes: two swing plates rotatably installed on the inner wall of the casing, a crushing roll is rotatably installed on each side of the two swing plates close to each other, and the two crushing rolls can rotate relative to each other; a blocking part arranged below the middle of the two crushing rolls and capable of moving up and down for adjustment, and a triangular crushing area is formed between the blocking part and the two crushing rolls. By reciprocating the two swing plates, the feeding speed of the crushing channel can be increased, thereby improving the crushing efficiency. And when the two crushing rolls swing downward, the extrusion effect will be improved under the action of the blocking part. In this way, not only can the extrusion of the two be used to improve the crushing effect, but also the downward acting force can avoid the upward splashing of ore debris during extrusion compared with the way of approaching horizontally to each other, thereby avoiding affecting the surrounding operators or nearby equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of crushers, and specifically to a pair-roll crusher for mining use. Background Art

[0002] A pair-roll crusher is a crusher that uses two oppositely rotating crushing rolls to crush materials, and is usually used in industries such as ore, construction, and chemical industry, playing an important role in the crushing process of ores.

[0003] Currently, as a Chinese invention patent with the patent publication number CN118002253B, it discloses a new type of pair-roll crusher for mining use. This crusher expands and contracts the gap between the crushing rolls through a reciprocating mechanism, and cooperates with the movement of the limiting columns, improving the efficiency of feeding ore and stones into the area between the two rolls, and also improving the effect of crushing stones.

[0004] However, the two crushing rolls of the above crusher move away from or approach each other in a horizontal movement manner. In this way, when the crushing rolls approach each other, under the action of the extrusion force in the horizontal direction, the small crushed pieces after crushing may splash out from above, resulting in the splashing of crushed stones at the feed inlet during the crushing process, and further affecting the surrounding operators or nearby equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a pair-roll crusher for mining use to solve at least one technical problem existing in the above prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A pair-roll crusher for mining use, including a machine shell, and further including:

[0007] Two swing plates rotatably installed on the inner wall of the machine shell, on the side of each of the two swing plates close to the other, a crushing roll is rotatably installed, and the two crushing rolls can rotate relative to each other;

[0008] A blocking part arranged below the middle of the two crushing rolls and capable of moving up and down for adjustment, and a triangular crushing area is formed between the blocking part and the two crushing rolls. A crushing channel for entering the crushing area is formed between the two crushing rolls, and discharge channels are respectively formed between the two crushing rolls and the blocking part;

[0009] A driving part for driving the two swing plates to rotate relative to each other reciprocally for adjustment, and expanding or shrinking the feeding diameter of the crushing channel.

[0010] Preferably, at the installation positions of the two swing plates, driving gears are rotatably installed coaxially. The two driving gears are driven by a servo motor installed outside the machine shell, and the two driving gears rotate relative to each other. A transmission gear is also coaxially fixed on the side wall of the crushing roll, and the transmission gear meshes with the corresponding driving gear.

[0011] Preferably, the blocking portion includes a lifting plate installed on the inner wall of the casing and capable of vertically reciprocating sliding adjustment, and a bottom supporting roller is rotatably installed on the outer wall of the lifting plate, and connecting plates are rotatably connected between the lifting plate and the two swing plates.

[0012] Preferably, two bottom supporting rollers are provided, and two opposite rotation gears are coaxially fixed to the two bottom supporting rollers, and the two opposite rotation gears are engaged with each other. One of the opposite rotation gears is driven by a motor installed on the lifting plate, and the rotation direction of the opposite rotation gear is the same as that of the driving gear at the same side position.

[0013] Preferably, a turntable is rotatably installed on the inner wall of the casing below the lifting plate, and the turntable is driven by a motor installed outside the casing, and a connecting rod is rotatably installed between the outer wall of the turntable away from the center of the circle and the lifting plate.

[0014] Preferably, a feed bin with an inverted conical design is provided at the top of the casing, and the discharge port of the feed bin corresponds to the crushing channel, and a blanking port is further provided at the bottom of the casing.

[0015] Preferably, a coarse filter screen with an inclined design is further installed on the inner wall of the casing, and a screening port is opened on the outer wall of the casing at the lower position of the coarse filter screen.

[0016] Preferably, a baffle plate is further installed at the discharge port of the feed bin, and the baffle plate is open at the bottom.

[0017] Preferably, a material conveyor belt is further installed below the blanking port at the bottom of the casing for conveying the crushed material.

[0018] Preferably, the outer walls of the two crushing rollers are both provided with convex ridges and are designed with different depths of grooves.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] First, by reciprocating swing of the two swing plates, the feeding speed of the crushing channel can be accelerated, thereby accelerating the crushing efficiency. And when the two crushing rollers swing downward, under the action of the blocking portion, the extrusion effect will be improved. In this way, not only can the crushing effect be improved by using their extrusion, but also compared with the way of approaching horizontally to each other, the downward acting force can avoid the upward splashing of ore debris during extrusion, thereby avoiding affecting the surrounding operators or nearby equipment.

[0021] II. Through the meshing between the driving gear and the driven gear in the present invention, when the swing plate reciprocates, the rotation speed of the crushing roller will change. That is, during the upward swing of the swing plate, the rotation speeds of the transmission gear and the crushing roller will slow down, which can prevent the crushing roller from ejecting the ore that has not had time to fall when it rises, so as to avoid ore splashing. When the swing plate swings downward, the rotation speeds of the transmission gear and the crushing roller increase. Coupled with the function of the blocking part, while the ore is under extrusion, the force between the ore and the crushing roller is further increased. In this way, while accelerating the feeding speed by reciprocally expanding or shrinking the crushing channel as described above, the crushing effect can be further improved by changing the rotation speed of the crushing roller.

[0022] III. In the present invention, by switching back and forth between the state where the linear speed of the crushing roller is greater than and less than the linear speed of the bottom supporting roller, the forces on the ore when it is rubbed by the two rollers are different, so that the ore rotates. And with the back-and-forth switching of the magnitude of the linear speed, the direction of the material rotation will change suddenly. This rotation and sudden change of force can increase the shearing and extrusion effects on the object between the crushing rollers and increase the internal stress of the object, thereby further improving the crushing effect of the ore when passing through the secondary crushing channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is the front view of the present invention;

[0025] Figure 3 of the present invention Figure 2 is the cross-sectional view along A-A in the present invention;

[0026] Figure 4 of the present invention Figure 2 is the cross-sectional view along B-B in the present invention;

[0027] Figure 5 is the left view of the present invention;

[0028] Figure 6 of the present invention Figure 5 is the half-sectional three-dimensional view along C-C in the present invention;

[0029] Figure 7 is the state diagram of the crushing channel of the present invention in the state of the minimum diameter;

[0030] Figure 8 is the state diagram of the crushing channel of the present invention in the state of the maximum diameter.

[0031] In the figure: 1. Machine housing; 2. Feeding bin; 3. Screening opening; 4. Swing plate; 5. Transmission gear; 6. Crushing roller; 7. Lifting plate; 8. Opposite rotating gear; 9. Bottom supporting roller; 10. Driving gear; 11. Connecting plate; 12. Turntable; 13. Connecting rod; 14. Coarse filter screen; 15. Baffle plate. Specific implementation mode

[0032] 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 work shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a pair-roller crusher for mines, including a machine housing 1, and further including:

[0034] Two swing plates 4 rotatably installed on the inner wall of the machine housing 1, and crushing rollers 6 are rotatably installed on one side of the two swing plates 4 close to each other, and the two crushing rollers 6 can rotate relative to each other;

[0035] A blocking part is arranged below the middle of the two crushing rollers 6 and can be adjusted up and down, and a triangular crushing area is formed between the blocking part and the two crushing rollers 6. A crushing channel for entering the crushing area is formed between the two crushing rollers 6, and discharge channels are respectively formed between the two crushing rollers 6 and the blocking part. The outer walls of the two crushing rollers 6 are both convex rib-shaped and designed with different depths of grooves;

[0036] A driving part is used to drive the two swing plates 4 to rotate relatively and reciprocally, and to expand or contract the feeding diameter of the crushing channel.

[0037] When the pair-roller crusher is in use, ore is fed into the crushing channel between the two crushing rollers 6, and is crushed under the relative rotation of the two crushing rollers 6. And under the blocking of the blocking part below, the ore is further crushed in the triangular crushing area until it falls from the discharge channels on both sides;

[0038] At the same time, the driving part drives the two swing plates 4 to rotate relatively and reciprocally, so that they rotate from a horizontal state to an inclined state, such as Figure 7 and Figure 8As shown, the two are the states before and after rotation. During the rotation process, the diameter of the crushing channel formed between the two crushing rolls 6 will increase with the swing of the swing plate 4, increasing from L1 to L2, so as to provide the feeding speed of the ore material. Then, as the swing plate 4 swings back, the crushing rolls 6 reduce the crushing channel between the two crushing rolls 6 to L1 again. In this way, the feeding speed of the crushing channel can be accelerated through the reciprocating swing of the two swing plates 4, thereby accelerating the crushing efficiency.

[0039] Moreover, it is worth mentioning that when the two swing plates 4 swing back, the two crushing rolls 6 will swing downward, and the extrusion effect is improved under the action of the blocking part. This way can not only utilize the extrusion of the two to improve the crushing effect, but also, compared with the way of approaching horizontally to each other, the downward acting force can avoid the upward splashing of the ore debris during extrusion, thus avoiding affecting the surrounding operators or nearby equipment.

[0040] In one relatively preferred embodiment, an implementation manner for driving the relative rotation of the two crushing rolls 6 is provided.

[0041] At the installation positions of the two swing plates 4, driving gears 10 are coaxially rotatably installed. The two driving gears 10 are driven by a servo motor installed outside the machine housing 1, and the two driving gears 10 rotate relatively. A transmission gear 5 is also coaxially fixed on the side wall of the crushing roll 6, and the transmission gear 5 meshes with the corresponding driving gear 10.

[0042] Specifically, refer to Figure 7 and Figure 8 . Through the drive of the motor outside the machine housing 1 and the meshing effect between the driving gear 10 and the transmission gear 5, the purpose of driving the relative rotation of the two crushing rolls 6 can be achieved. The specific rotation direction is shown by the arrow in Figure 7 .

[0043] It is worth mentioning that, as can be seen from the above, the diameter of the crushing channel is realized by the swing of the swing plate 4. Therefore, when the swing plate 4 swings upward, at this time, the transmission gear 5 will rotate in a circular motion along the driving gear 10. Since the revolution direction of the transmission gear 5 is the same as the rotation direction of the driving gear 10, during this process, the revolution speed of the transmission gear 5 will offset the rotation speed of the driving gear 10 to a certain extent. Therefore, during the upward swing of the swing plate 4, the rotation speeds of the transmission gear 5 and the crushing roll 6 will slow down, which can avoid the crushing roll 6 from ejecting the ore material that has not had time to fall when lifting, so as to avoid the splashing of the ore material.

[0044] Conversely, when the swing plate 4 swings downward, the revolution direction of the transmission gear 5 is opposite to the rotation direction of the driving gear 10. Therefore, during this process, the rotation speed of the driving gear 10 will be increased to a certain extent, which in turn causes the transmission gear 5 and the crushing roller 6 to rotate faster during reset. Together with the action of the blocking part, the ore material is further stressed between it and the crushing roller 6 while being squeezed;

[0045] In this way, while accelerating the feeding speed by reciprocally expanding or reducing the crushing channel as described above, the crushing effect can be further improved by changing the rotation speed of the crushing roller 6.

[0046] In one relatively preferred embodiment, an implementation manner of the blocking part is provided. Specifically, reference can be made to Figure 4 and Figure 7 ;

[0047] The blocking part includes a lifting plate 7 installed on the inner wall of the machine housing 1 and capable of vertically reciprocating and sliding adjustment. A bottom-supporting roller 9 is rotatably installed on the outer wall of the lifting plate 7. Connecting plates 11 are rotatably connected between the lifting plate 7 and the two swing plates 4.

[0048] During the crushing process, the lifting plate 7 is driven by an external structure to vertically reciprocate and adjust. Under the action of the connecting plate 11, the two swing plates 4 will be driven to reciprocally swing, thereby achieving the purpose of adjusting the diameter of the crushing channel as described above;

[0049] Moreover, during the vertical lifting of the lifting plate 7, the distance between the bottom-supporting roller 9 and the crushing roller 6 can be kept constant, that is, the distance shown as L in Figures 7-8 . In this way, the discharge channel formed between the bottom-supporting roller 9 and the crushing roller 6 will form a secondary crushing channel, and while accelerating the feeding speed as described above, the quality of crushing can be ensured.

[0050] In one relatively preferred embodiment, two bottom-supporting rollers 9 are provided. Two counter-rotating gears 8 are coaxially fixed to the two bottom-supporting rollers 9, and the two counter-rotating gears 8 are meshed with each other. One of the counter-rotating gears 8 is driven by a motor installed on the lifting plate 7, and the rotation direction of the counter-rotating gear 8 is the same as that of the driving gear 10 at the same side position.

[0051] Refer to Figures 7-8 . Two bottom-supporting rollers 9 are designed, and under the action of the counter-rotating gears 8, the rotation directions of the two bottom-supporting rollers 9 are also relatively rotating and the same as the rotation direction of the driving gear 10. Specifically, reference can be made to the direction indicated by the arrow in Figure 7 ;

[0052] In this way, the ore material passing through the crushing channel will be secondarily crushed under the rotational extrusion of the crushing roller 6 and the bottom-supporting roller 9, thereby improving the crushing effect;

[0053] Moreover, it is worth mentioning that the rotation direction of the backup roll 9 is opposite to that of the corresponding crushing roll 6. Therefore, the force exerted by the ore between the two rolls will be towards the axis of each roll. Then, when the rotational linear velocity of the backup roll 9 is set to be the same as that of the driving gear 10, on the premise that the rotational speed of the crushing roll 6 is the same as that of the driving gear 10, the magnitudes of the frictional forces of the two rolls on the ore are equal and opposite in direction. Therefore, the ore will only be subjected to the crushing force of extrusion;

[0054] However, as can be seen from the above content, the rotational speed of the crushing roll 6 will increase or decrease with the swing of the swing plate 4. Therefore, the linear velocity between the crushing roll 6 and the backup roll 9 will change, that is, the linear velocity of the crushing roll 6 will switch back and forth between the states of being greater than and less than the linear velocity of the backup roll 9. This will cause the ore to be subjected to different forces when being rubbed by the two rolls, resulting in the rotation of the ore. And with the back-and-forth switching of the magnitude of the linear velocity, the rotation direction of the material will undergo a sudden change. This rotation and sudden change of force can increase the shearing and extrusion effects of the object between the crushing rolls and increase the internal stress of the object, thereby further improving the crushing effect of the ore when passing through the secondary crushing channel.

[0055] In one relatively preferred embodiment, an implementation manner for driving the vertical reciprocating movement adjustment of the lifting plate 7 is provided;

[0056] A turntable 12 is rotatably installed on the inner wall of the housing 1 below the lifting plate 7, and the turntable 12 is driven by a motor installed outside the housing 1. A connecting rod 13 is rotatably installed between the outer wall of the turntable 12 away from the center of the circle and the lifting plate 7.

[0057] Specifically, refer to Figure 3 and Figure 4 , through the crank-slider structure formed by the turntable 12, the connecting rod 13 and the turntable 12, the rotation of the turntable 12 can drive the lifting plate 7 to reciprocate, and further drive the reciprocating swing of the two swing plates 4;

[0058] Moreover, in combination with the above content, the rotational speed of the turntable 12 can also be controlled so that the lifting plate 7 decelerates when moving upward and accelerates when moving downward, to cooperate with the rotational speed change of the above-mentioned crushing roll 6, further avoiding the splashing of the ore, and at the same time increasing the extrusion force of the crushing roll 6, so as to achieve the purpose of improving the crushing effect.

[0059] In one relatively preferred embodiment, a feed bin 2 with an inverted conical design is provided at the top of the housing 1, and the discharge port of the feed bin 2 corresponds to the crushing channel. A discharge port is also provided at the bottom of the housing 1, and a material conveyor belt is erected below the discharge port at the bottom of the housing 1 for conveying the crushed material.

[0060] Refer to Figure 3, the ore can enter through a conveyor belt or a transport vehicle from the feed bin 2 at the top of the casing 1, and then be discharged from the lower discharge opening after being crushed, and fall onto the material conveyor belt installed below and be transported to the next process.

[0061] In one relatively preferred embodiment, a coarsely filtered screen 14 designed to be inclined is further installed on the inner wall of the casing 1, and a screening opening 3 is also provided on the outer wall of the casing 1 at the lower position of the coarsely filtered screen 14.

[0062] Since the orientation of the ore during crushing is different, it may cause long and flat materials to fall from the crushing rolls 6 without being completely crushed. Therefore, the coarsely filtered screen 14 can be used to preliminarily screen the crushed ore. The small-particle materials fall, and the large-particle materials are discharged from the screening opening 3 and can enter again from the feed bin 2 for re-crushing.

[0063] In one relatively preferred embodiment, a baffle plate 15 is further installed at the discharge opening position of the feed bin 2, and the baffle plate 15 is open at the bottom. Refer to Figure 6 , the design of the baffle plate 15 can prevent the ore from directly falling from both sides of the crushing rolls 6, so as to improve the crushing efficiency.

[0064] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification and drawings, they can also be directly processed without any doubt according to the existing technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology. Therefore, no specific description will be made here.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mining roller crusher, comprising a housing (1), characterized in that: Also includes: Two swing plates (4) are rotatably mounted on the inner wall of the casing (1), and crushing rollers (6) are rotatably mounted on the adjacent sides of the two swing plates (4), and the two crushing rollers (6) can rotate relative to each other; A blocking part is arranged below the middle of the two crushing rollers (6) and can be moved up and down for adjustment, and a triangular crushing area is formed between the blocking part and the two crushing rollers (6), a crushing channel for entering the crushing area is formed between the two crushing rollers (6), and a discharge channel is formed between the two crushing rollers (6) and the blocking part; A driving part, used for driving the two swing plates (4) to rotate back and forth relative to each other and adjust the feed diameter of the crushing channel to expand or reduce; A driving gear (10) is coaxially mounted at the mounting positions of the two swing plates (4), the two driving gears (10) are driven by a servo motor mounted outside the housing (1), and the two driving gears (10) rotate relative to each other, a transmission gear (5) is coaxially fixed to the side wall of the crushing roller (6), and the transmission gear (5) is meshed with the corresponding driving gear (10); The blocking portion comprises a lifting plate (7) mounted on the inner wall of the casing (1) and capable of vertical reciprocating sliding adjustment, and a bottom roller (9) is rotatably mounted on the outer wall of the lifting plate (7), and a connecting plate (11) is rotatably connected between the lifting plate (7) and the two swing plates (4).

2. The mining double-roll crusher according to claim 1, characterized in that: Two bottom rollers (9) are provided, and counter-rotating gears (8) are coaxially fixed to the two bottom rollers (9), and the two counter-rotating gears (8) are meshed with each other, and one of the counter-rotating gears (8) is driven by a motor installed on the lifting plate (7), and the counter-rotating gear (8) rotates in the same direction as the driving gear (10) at the same side.

3. The mining double-roll crusher according to claim 2, characterized in that: A turntable (12) is rotatably mounted on the inner wall of the casing (1) below the lifting plate (7), and the turntable (12) is driven by a motor mounted outside the casing (1). A connecting rod (13) is rotatably mounted between the outer wall of the turntable (12) away from the center of the circle and the lifting plate (7).

4. The mining double-roll crusher according to claim 1, characterized in that: A feed bin (2) with an inverted cone-shaped design is provided on the top of the casing (1), and a discharge port of the feed bin (2) corresponds to the crushing channel. A discharge port is also provided at the bottom of the casing (1).

5. The mining double-roll crusher according to claim 1, characterized in that: The inner wall of the casing (1) is also provided with a coarse filter screen (14) with an inclined design, and the outer wall of the casing (1) located below the coarse filter screen (14) is also provided with a screening opening (3).

6. The mining roller crusher according to claim 4, characterized in that: A material blocking plate (15) is also installed at the discharge port of the feed bin (2), and the material blocking plate (15) is open at the bottom.

7. The mining double-roll crusher according to claim 4, characterized in that: A material conveyor belt is also provided below the material drop opening at the bottom of the casing (1) for conveying the crushed material.

8. The mining double-roll crusher according to any one of claims 1 to 7, characterized in that: The outer walls of the two crushing rollers (6) are both convex and have grooves of varying depths.

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