Mechanism quartz sand pre-grinding torque roller mill

Abstract

A mechanism quartz sand pre-grinding torque type roller mill, including base and setting on the base in turn turnover stabilizing device, upper driven roller assembly, lower driving roller assembly, drag force device, lower driving roller assembly and base fixed connection, upper driven roller assembly, turnover stabilizing device, drag force device and base rotatable connection, turnover stabilizing device is also rotatable with upper driven roller assembly, turnover stabilizing device through the way of jacking make upper driven roller assembly and base relative rotation and close to lower driving roller assembly, to make upper driven roller assembly and lower driving roller assembly between the grinding gap, drag force device and upper driven roller assembly detachable connection, drag force device and upper driven roller assembly when connecting, to upper driven roller assembly exert drag force in oblique down direction and turnover stabilizing device continues to press from driven roller assembly, to make upper driven roller assembly and lower driving roller assembly between the grinding gap stable maintain, guarantee the granularity of the ground standard sand is consistent.

Description

Technical Field

[0001] This invention relates to the field of material crushing technology, and in particular to a torque roller mill for pre-grinding machine-made quartz sand. Background Technology

[0002] With the continuous development of my country's economy and the rapid growth of the construction industry, natural sand, as one of the most basic building materials, has become increasingly scarce due to extensive dredging. Furthermore, the disorderly dredging has severely disrupted the normal flow of existing rivers and negatively impacted their ecological environment. Therefore, a device for preparing construction sand and gravel—the "sand making machine"—has emerged.

[0003] Most sand making machines use high-speed rotating impact principles to crush mineral sand, which is then ground, dried, and screened to obtain manufactured quartz sand. These manufacturers are limited by their equipment and technological capabilities, and their target customers do not have high requirements for particle size distribution. Therefore, the particle size distribution control precision of the manufactured quartz sand is not high, resulting in it failing to meet the requirements of the Chinese ISO standard for particle morphology and roundness. To ensure that the manufactured quartz sand meets the requirements of the Chinese ISO standard for raw materials, standard sand manufacturers will pre-grind the manufactured quartz sand.

[0004] For example, the technical solution provided by patent application number 201310530292.5 and invention title "High-efficiency and durable roller press" is as follows: The high-efficiency and durable roller press includes a feeding device, a conveying device, a fixed roller, and a moving roller, all mounted on a frame. The conveying device is driven and connected by a first variable frequency motor. The fixed roller is fixed on the frame and driven and connected by a second variable frequency motor to rotate the fixed roller. The moving roller is fixed to one end of a lever arm, which is also fixed on the frame. The lever arm is connected to a hydraulic jack, which provides pressure to the moving roller and brings it closer to the fixed roller. Crushing pressure is formed between the moving roller and the fixed roller to achieve grinding.

[0005] For example, the technical solution provided by patent application number 202123362232.6 and invention title "An Inclined Roller Press" is as follows: The inclined roller press includes a base, a mounting seat, a hydraulic cylinder, a support plate, a lead screw, a drive roller, a driven roller, and a driving component. The driven roller is rotatably connected to the mounting seat, and the drive roller is rotatably connected to the base. The mounting seat is located above the base and is rotatably connected to the base. A hydraulic cylinder is provided at one end of the base, and the piston rod of the hydraulic cylinder is hinged to the mounting seat. By driving the piston rod of the hydraulic cylinder to extend and retract, the mounting seat can be rotated, thereby adjusting the feed gap between the drive roller and the driven roller and the pressure between the drive roller and the driven roller. At the same time, by rotating the lead screw, the support plate is driven to slide down, thereby achieving fine adjustment of the gap and pressure between the drive roller and the driven roller. When the material is conveyed between the drive roller and the driven roller, the drive component causes the drive roller to rotate, thereby crushing the ore between the two rollers and realizing controllable adjustment of the particle size of the crushed ore.

[0006] However, the aforementioned existing technologies have the following technical problems: they all use a hydraulic jack (piston rod of a hydraulic cylinder) to press the driven roller from the rear to adjust the feed gap between the driving roller and the driven roller, as well as the pressure between the driving roller and the driven roller. However, when the material enters from the front of the driven roller, the material will exert a separate force on the driving roller and the driven roller. Moreover, the jacking pressure provided by the hydraulic method is unstable and cannot guarantee that the gap and pressure between the driving roller and the driven roller are maintained within a stable range, which ultimately leads to inconsistent particle size of the standard sand produced by grinding. Summary of the Invention

[0007] In view of this, it is necessary to provide a torque roller mill for pre-grinding quartz sand that ensures that the gap and pressure between the driving roller and the driven roller are maintained within a stable range.

[0008] A torque-type roller mill for pre-grinding machined quartz sand includes a base, an upper driven roller assembly, a tilting and stabilizing device, a lower driving roller assembly, and a dragging and applying force device. The upper driven roller assembly, tilting and stabilizing device, lower driving roller assembly, and dragging and applying force device are mounted on the base. The upper driven roller assembly is located on one side of the lower driving roller assembly, and the dragging and applying force device is located on the other side of the lower driving roller assembly. The upper driven roller assembly is positioned between the tilting and stabilizing device and the lower driving roller assembly. The lower driving roller assembly is fixedly connected to the base. The upper driven roller assembly, tilting and stabilizing device, dragging and applying force device, and base are all connected together. The rotating and stabilizing device is also rotatably connected to the upper driven roller assembly. The rotating and stabilizing device lifts the upper driven roller assembly relative to the base and moves it closer to the lower driving roller assembly, so that a grinding gap is formed between the upper driven roller assembly and the lower driving roller assembly. The dragging force application device is detachably connected to the upper driven roller assembly. When the dragging force application device is connected to the upper driven roller assembly, it applies a downward dragging force to the upper driven roller assembly, and the rotating and stabilizing device continuously presses against the driven roller assembly to maintain a stable grinding gap between the upper driven roller assembly and the lower driving roller assembly.

[0009] In the aforementioned torque roller mill for pre-grinding of quartz sand, the upper driven roller assembly, the tilting and stabilizing device, the lower driving roller assembly, and the dragging and applying force device are mounted on a base. The upper driven roller assembly is located on one side of the lower driving roller assembly, and the dragging and applying force device is located on the other side of the lower driving roller assembly. The upper driven roller assembly is positioned between the tilting and stabilizing device and the lower driving roller assembly. The lower driving roller assembly is fixedly connected to the base, while the upper driven roller assembly, the tilting and stabilizing device, and the dragging and applying force device are rotatably connected to the base. The tilting and stabilizing device is also rotatably connected to the upper driven roller assembly. The overturning stabilizing device lifts the upper driven roller assembly relative to the base and moves it closer to the lower driven roller assembly, thus creating a grinding gap between them. The dragging force device is detachably connected to the upper driven roller assembly. When connected, the dragging force device applies a downward dragging force to the driven roller assembly, and the overturning stabilizing device continuously presses against the upper driven roller assembly to maintain a stable grinding gap between them, ensuring that the particle size of the ground standard sand is consistent throughout. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a torque roller mill for pre-grinding machined quartz sand, representing a preferred embodiment.

[0011] Figure 2 for Figure 1 A schematic diagram of the upper driven roller assembly of a torque roller mill for pre-grinding quartz sand.

[0012] Figure 3 for Figure 1A schematic diagram of the upper driven roller assembly of a torque roller mill for pre-grinding quartz sand, showing another angle of its opening.

[0013] Figure 4 for Figure 1 Front view of a torque roller mill for pre-grinding quartz sand.

[0014] Figure 5 for Figure 1 A schematic diagram of the structure of a torque roller mill for pre-grinding quartz sand from another angle.

[0015] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle.

[0016] The diagram shows: a torque roller mill for pre-grinding machined quartz sand 10, a base 20, an upper driven roller assembly 30, a driven roller 31, a shielding force-applying housing 32, a first speed sensor 33, a first drive motor 34, a tilting stabilizing device 40, a lower active roller assembly 50, an active roller 51, a supporting sidewall 52, a second speed sensor 53, a second drive motor 54, a dragging force-applying device 60, a control device 70, a machined quartz sand conveying device 80, a support frame 81, a conveying adjustment device 82, a bearing plate 820, a T-shaped slide rail 8201, a sliding plate 821, a chute 8210, a lifting device 823, a third motor 8230, a first lead screw 8231, a first threaded sleeve 8232, a bearing plate connector 8234, a sliding plate drive device 824, a second lead screw 8240, a second threaded sleeve 8241, a fourth motor 8242, a conveying device 83, a hopper 84, a position sensor 90, and a pressure stabilizing device 91. Detailed Implementation

[0017] Please also refer to Figure 1The torque roller mill 10 for pre-grinding of machine-made quartz sand of this application includes a base 20, an upper driven roller assembly 30, a tilting and stabilizing device 40, a lower driving roller assembly 50, and a dragging and applying force device 60. The upper driven roller assembly 30, the tilting and stabilizing device 40, the lower driving roller assembly 50, and the dragging and applying force device 60 are disposed on the base 20. The upper driven roller assembly 30 is located on one side of the lower driving roller assembly 50, and the dragging and applying force device 60 is located on the other side of the lower driving roller assembly 50. The upper driven roller assembly 30 is located between the tilting and stabilizing device 40 and the lower driving roller assembly 50. The lower driving roller assembly 50 is fixedly connected to the base 20. The upper driven roller assembly 30, the tilting and stabilizing device 40, and the dragging and applying force device 60 are all located on the base 20. The base 60 is rotatably connected to the base 20, and the tilting stabilizing device 40 is also rotatably connected to the upper driven roller assembly 30. The tilting stabilizing device 40 lifts the upper driven roller assembly 30 relative to the base 20 and brings it closer to the lower driven roller assembly 50, so that a grinding gap is formed between the upper driven roller assembly 30 and the lower driven roller assembly 50. The dragging force application device 60 is detachably connected to the upper driven roller assembly 30. When the dragging force application device 60 is connected to the upper driven roller assembly 30, it applies a downward dragging force to the upper driven roller assembly 30, and the tilting stabilizing device 40 continuously presses against the driven roller assembly 30 to stably maintain the grinding gap between the upper driven roller assembly 30 and the lower driven roller assembly 50. Both the tilting stabilizing device 40 and the dragging force application device 60 use hydraulic methods to provide lifting and dragging forces.

[0018] Furthermore, the torque roller mill 10 for pre-grinding machined quartz sand also includes a control device 70. The control device 70 is electrically connected to the upper driven roller assembly 30, the overturning stabilizing device 40, the lower driving roller assembly 50, and the dragging force application device 60. The control device 70 controls the rotation of the upper driven roller assembly 30 according to the rotation speed of the lower driving roller assembly 50. After the rotation speed of the upper driven roller assembly 30 matches that of the lower driving roller assembly 50, the drive of the upper driven roller assembly 30 is stopped. The lower driving roller assembly 50 and the machined quartz sand located in the grinding gap are used to drive the driven roller assembly 30. In this way, when the torque roller mill 10 for pre-grinding machined quartz sand is started, the rotation speeds of the upper driven roller assembly 30 and the lower driving roller assembly 50 are matched, which can ensure that the machined quartz sand enters the grinding gap smoothly, avoid a large speed difference between the driven roller of the upper driven roller assembly 30 and the machined quartz sand, and reduce the wear of the driven roller of the upper driven roller assembly 30 by the machined quartz sand.

[0019] Furthermore, the torque roller mill 10 for pre-grinding machined quartz sand also includes a machined quartz sand conveying device 80. The control device 70 is electrically connected to the machined quartz sand conveying device 80. The machined quartz sand conveying device 80 is mounted on the base 20 and is located on the same side as the dragging force application device 60. The control device 70 controls the conveying speed of the machined quartz sand conveying device 80 according to the specifications of the machined quartz sand, so that machined quartz sand of different specifications enters the grinding gap between the upper driven roller assembly 30 and the lower driven roller assembly 60 at the corresponding speed. In this way, for machined quartz sand of different specifications, the machined quartz sand conveying device 80 can make the conveyed machined quartz sand reach and enter the grinding gap at a suitable speed and entry angle.

[0020] In this embodiment, please also refer to Figures 2 to 6 The upper driven roller assembly 30 includes a driven roller 31, a shielding force-applying housing 32 with an opening, a first speed sensor 33, and a first drive motor 34. The upper end of the shielding force-applying housing 32 near the opening is detachably connected to the dragging force-applying device 60, the lower end of the shielding force-applying housing 32 near the opening is rotatably connected to the base 20, and the shell wall of the shielding force-applying housing 32 away from the opening is rotatably connected to the overturning stabilizing device 40. The driven roller 31 is rotatably disposed inside the shielding force-applying housing 32. The first drive motor 34 is disposed on the outer wall of the shielding force-applying housing 32, and one end of the driven roller 31 is fixedly connected to the rotating end of the first drive motor 34. The first speed sensor 33 is mounted on the shielding force-applying housing 32 near the rotating end of the first drive motor 34. The control device 70 is electrically connected to the first drive motor 34 and the first speed sensor 33. The first speed sensor 33 senses the rotation of the rotating end of the first drive motor 34 and generates a corresponding speed signal. The control device 70 determines the speed based on the lower driving roller assembly. The rotational speed of the first drive motor 34 is controlled by the rotational speed of the 50. The control device 70 also generates a corresponding first rotational speed value based on the first rotational speed signal generated by the first rotational speed sensor 33. When the generated first rotational speed value corresponds to the rotational speed of the lower active roller assembly 50, the first drive motor 34 is stopped to use the lower active roller assembly 50 and the machined quartz sand located in the grinding gap to drive the driven roller 31. During the driving process of the driven roller 31, the control device 70 also compares the generated first rotational speed value with the rotational speed of the lower active roller assembly 50 in real time. When the comparison shows that the first rotational speed value does not correspond to the rotational speed of the lower active roller assembly 50, the first drive motor 34 is controlled to rotate again to match the rotational speed of the driven roller 31 with that of the active roller assembly 50. In this way, the grinding efficiency is guaranteed with the lowest energy consumption of the upper driven roller assembly 30. At the same time, wear on the active roller 51 and driven roller 31 caused by a large speed difference between the machined quartz sand and the active roller 51 and driven roller 31 is avoided.

[0021] The lower active roller assembly 50 includes an active roller 51, two supporting sidewalls 52 parallel to each other on the base, a second speed sensor 53, and a second drive motor 54. Both ends of the active roller 51 are rotatably connected to the two supporting sidewalls 52. The second drive motor 54 and the second speed sensor 53 are fixedly connected to one of the supporting sidewalls 52, and the rotating end of the second drive motor 54 is fixedly connected to one end of the active roller 51. The second speed sensor 53 is located near the rotating end of the second drive motor 54. The control device 70 is electrically connected to the second drive motor 54 and the second speed sensor 53. The second speed sensor 53 senses… The rotating end of the second drive motor 54 rotates and generates a corresponding second speed signal. The control device 70 also generates a corresponding second speed value based on the second speed signal generated by the second speed sensor 53. The control device 70 controls the first drive motor 34 to rotate based on the second speed value so that the speed of the driven roller 31 corresponds to the speed of the driving roller 51, so as to avoid a large speed difference between the driving roller 51, the driven roller 31, and the machine-made quartz sand, thereby avoiding wear on the driving roller 51 and the driven roller 31 caused by a large speed difference between the machine-made quartz sand and the driving roller 51 and the driven roller 31.

[0022] The machine-made quartz sand conveying device 80 includes a support frame 81, a conveying adjustment device 82, and a conveying device 83. The support frame 81 is mounted on the base 20. The first end of the conveying adjustment device 82 is connected to the support frame 81 and can rise or fall. The second end of the conveying adjustment device 82 is rotatably connected to the two supporting side walls 52 of the lower drive roller assembly 50 and is located between the two supporting side walls 52. The second end of the conveying adjustment device 82 is at a predetermined distance from the drive roller 51. The conveying device 83 is slidably mounted on the conveying adjustment device 82. The control device 70 is electrically connected to the conveying adjustment device 82 and the conveying device 83. The control device 70 controls the height of the first end of the conveying adjustment device 82 and the conveying speed of the conveying device 83 according to the specifications of the machine-made quartz sand, so that machine-made quartz sand of different specifications enters the grinding gap between the driven roller 31 and the drive roller 51 at the corresponding speed and angle. Furthermore, the angle between the line connecting the axis of the driven roller 31 and the axis of the driven roller 51 and the horizontal plane is in the range of 45 degrees to 50 degrees. This, in conjunction with the machine-made quartz sand conveying device 80, ensures that the machine-made quartz sand smoothly enters the grinding gap between the driven roller 31 and the driven roller 51, and achieves the highest grinding efficiency.

[0023] In this embodiment, the conveying adjustment device 82 includes a support plate 820, a sliding plate 821, a lifting device 823, and a sliding plate drive device 824. The lifting device 823 and the sliding plate drive device 824 are electrically connected to the control device 70. The lifting device 823 is fixed on the support frame 81. The lifting end of the lifting device 823 is rotatably connected to the first end of the support plate 820, and the second end of the support plate 820 is rotatably connected to the two support sidewalls 52 of the lower active roller assembly 50. Located between two supporting sidewalls 52, a sliding plate 821 is slidably mounted on a support plate 820. A sliding plate drive device 824 is fixed to the first end of the support plate 820 and connected to the sliding plate 821. A conveying device 83 is fixed on the sliding plate 821 and is closer to the drive roller 51 than the sliding plate 821. The sliding plate drive device 824 drives the sliding plate 821 to move along the length of the support plate 820 so that the conveying device 83 moves closer to or further away from the drive roller 51.

[0024] The lifting device 823 includes a third motor 8230, a first lead screw 8231, a first threaded sleeve 8232 cooperating with the first lead screw 8231, and a bearing plate connector 8234. The third motor 8230 is fixed on the support frame 81 and located above the bearing plate 820. The rotating end of the third motor 8230 is fixedly connected to one end of the first lead screw 8231. The third motor 8230 is also electrically connected to the control device 70. The first threaded sleeve 8232 is sleeved on the first lead screw 8231 and is fixedly connected to one end of the bearing plate connector 8234. The other end of the bearing plate connector 8234 is connected to the first end of the bearing plate 820 through a pivoting mechanism. The sliding plate driving device 824 includes a second lead screw 8240 and a second threaded sleeve 8232. 41. A fourth motor 8242 is fixedly connected to the first end of the support plate 820. A second threaded sleeve 8241 is fixed on the surface of the sliding plate 821 opposite to the support plate 820. The second threaded sleeve 8241 is also sleeved on the second lead screw 8241. The fourth motor 8242 is also electrically connected to the control device 70. The rotating end of the fourth motor 8242 is fixedly connected to one end of the second lead screw 8241. A T-shaped slide rail 8201 is provided on the surface of the support plate 820 opposite to the sliding plate 821. A corresponding slide groove 8210 that cooperates with the T-shaped slide rail 8201 is provided on the surface of the corresponding sliding plate 821 opposite to the support plate 820. The sliding plate 821 moves smoothly through the T-shaped slide rail 8201 and the slide groove 8210. By adjusting the lifting and lowering of the lifting device 823, changing the conveying speed of the conveying device 83, and moving the sliding plate 821 by the sliding plate drive device 824, the machine-made quartz sand enters the grinding gap between the driven roller 31 and the driving roller 51 at a preset angle.

[0025] The machine-made quartz sand conveying device 80 also includes a hopper 84, which is fixed on the support frame 81 and located above the conveying device 83. The hopper 84 continuously and quantitatively supplies the stored machine-made quartz sand to the conveying device 83. For example, the conveying device 83 is a belt conveyor, and the conveying device 83 is fixedly connected to the sliding plate 821 through the support arm.

[0026] Furthermore, the torque roller mill 10 for pre-grinding of machine-made quartz sand also includes a position sensor 90 and a pressure stabilizing device 91. The position sensor 90 is mounted on the support side wall 52 and is electrically connected to the control device 70. The opening of the shielding force-applying housing 32 cooperates with the two support side walls 52 parallel to the base 20. When the shielding force-applying housing 32 is fastened to the support side wall 52, the driven roller 31 is parallel to the driving roller 51, and when the shielding force-applying housing 32 touches the position sensor 90... The position sensor 90 generates a corresponding stop signal. Based on this signal, the control device 70 controls the tilting stabilizing device 40 and the dragging force application device 60 to operate, preventing contact between the driven roller 31 and the driving roller 51, thus avoiding direct wear between them. The pressure stabilizing device 91 is connected to the dragging force application device 60, which uses a hydraulic cylinder to provide dragging force. The pressure stabilizing device 91 provides nitrogen to the dragging force application device 60 to ensure stable hydraulic oil pressure within it. Simultaneously, the tilting stabilizing device 40 and the dragging force application device 60 utilize hydraulic pressure to achieve the force application function, reducing the impact of overall machine vibration on the rotation of the driven roller 31 and the driving roller 51, ensuring stable rotation between them and effectively grinding the quartz sand.

[0027] In the aforementioned torque roller mill 10 for pre-grinding of quartz sand, the upper driven roller assembly 30, the tilting and stabilizing device 40, the lower driving roller assembly 50, and the dragging force application device 60 are mounted on the base 20. The tilting and stabilizing device 40 lifts the upper driven roller assembly 30 relative to the base 20 and moves it closer to the lower driving roller assembly 50, thereby creating a grinding gap between the upper driven roller assembly 30 and the lower driving roller assembly 50. When the dragging force application device 60 is connected to the upper driven roller assembly 30, it applies a downward dragging force to the driven roller assembly 30, and the tilting and stabilizing device 40 continuously presses against the upper driven roller assembly 30, thereby maintaining a stable grinding gap between the upper driven roller assembly 30 and the lower driving roller assembly 50, ensuring that the particle size of the ground standard sand is consistent throughout.

Claims

1. A torque roller mill for pre-grinding machine-made quartz sand, characterized in that: The system includes a base, an upper driven roller assembly, a tilting stabilizing device, a lower driving roller assembly, and a dragging force application device. These components are mounted on the base, with the upper driven roller assembly located on one side of the lower driving roller assembly and the dragging force application device on the other side. The upper driven roller assembly is positioned between the tilting stabilizing device and the lower driving roller assembly. The lower driving roller assembly is fixedly connected to the base, while the upper driven roller assembly, tilting stabilizing device, and dragging force application device are rotatably connected to the base. The tilting stabilizing device is also rotatably connected to the upper driven roller assembly. The tilting stabilizing device causes the upper driven roller assembly to rotate relative to the base by lifting. The upper driven roller assembly is positioned close to the lower driving roller assembly to create a grinding gap between them. A dragging force device is detachably connected to the upper driven roller assembly. When connected, the dragging force device applies a downward dragging force to the upper driven roller assembly, while the tilting stabilizing device continuously presses against the driven roller assembly to maintain a stable grinding gap between them. The assembly also includes a control device electrically connected to the upper driven roller assembly, the tilting stabilizing device, the lower driving roller assembly, and the dragging force device. The control device controls the rotation of the upper driven roller assembly based on the rotational speed of the lower driving roller assembly, ensuring that the rotational speed of the upper driven roller assembly matches that of the lower driving roller assembly. After matching, the driven roller assembly is stopped, and the driven roller assembly is driven by the lower driving roller assembly and the machined quartz sand located in the grinding gap. The upper driven roller assembly includes a driven roller, a shielding force-applying housing with an opening, a first speed sensor, and a first drive motor. The upper end of the shielding force-applying housing near the opening is detachably connected to the dragging force-applying device, the lower end of the shielding force-applying housing near the opening is rotatably connected to the base, and the shell wall of the shielding force-applying housing away from the opening is rotatably connected to the overturning stabilizing device. The driven roller is rotatably disposed inside the shielding force-applying housing, and the first drive motor is disposed on the outer wall of the shielding force-applying housing, with one end of the driven roller fixed to the rotating end of the first drive motor. The first speed sensor is mounted on the shielding force-applying housing and close to the rotating end of the first drive motor. The control device is electrically connected to the first drive motor and the first speed sensor. The first speed sensor senses the rotation of the rotating end of the first drive motor and generates a corresponding speed signal. The control device controls the rotation of the first drive motor according to the speed of the lower active roller assembly. The control device also generates a corresponding first speed value according to the first speed signal generated by the first speed sensor. When it is determined that the generated corresponding speed value corresponds to the speed of the lower active roller assembly, the control device stops the first drive motor from working, so as to use the lower active roller assembly and the machined quartz sand located in the grinding gap to make the driven roller follow. During the driven roller's driving process, the control device also compares the generated first speed value with the speed of the lower driving roller assembly in real time. If the comparison shows that the first speed value does not correspond to the speed of the lower driving roller assembly, the control device then controls the first drive motor to rotate so that the speeds of the driven roller and the driving roller assembly are matched.

2. The torque roller mill for pre-grinding machined quartz sand as described in claim 1, characterized in that: The torque roller mill for pre-grinding machined quartz sand also includes a machined quartz sand conveying device. The control device is electrically connected to the machined quartz sand conveying device. The machined quartz sand conveying device is mounted on the base and is located on the same side as the dragging force application device. The control device controls the conveying speed of the machined quartz sand conveying device according to the specifications of the machined quartz sand, so that machined quartz sand of different specifications enters the grinding gap between the driven roller assembly and the lower driving roller assembly at the corresponding speed.

3. The torque roller mill for pre-grinding machine-made quartz sand as described in claim 1, characterized in that: The lower active roller assembly includes an active roller, two supporting sidewalls parallel to each other on the base, a second speed sensor, and a second drive motor. The two ends of the active roller are rotatably connected to the two supporting sidewalls. The second drive motor and the second speed sensor are fixedly connected to one of the supporting sidewalls, and the rotating end of the second drive motor is fixedly connected to one end of the active roller. The second speed sensor is close to the rotating end of the second drive motor. The control device is electrically connected to the second drive motor and the second speed sensor. The second speed sensor senses the rotation of the rotating end of the second drive motor and generates a corresponding second speed signal. The control device also generates a corresponding second speed value based on the second speed signal generated by the second speed sensor. The control device controls the first drive motor to rotate based on the second speed value to avoid the machine-made quartz sand from failing to enter the grinding gap smoothly due to the speed difference between the active roller and the driven roller.

4. The torque roller mill for pre-grinding machine-made quartz sand as described in claim 1, characterized in that: It also includes a position sensor, which is installed on the support side wall and electrically connected to the control device. The opening of the shielding force application housing cooperates with the two support side walls that are parallel to each other on the base. When the shielding force application housing is fastened to the support side wall, the driven roller is parallel to the driving roller. When the shielding force application housing touches the position sensor, the position sensor generates a corresponding stop signal. The control device controls the flipping stabilizing device and the dragging force application device to work according to the stop signal to prevent the driven roller from contacting the driving roller.

5. The torque roller mill for pre-grinding machined quartz sand as described in claim 2, characterized in that: The machine-made quartz sand conveying device includes a support frame, a conveying adjustment device, and a conveying device. The support frame is mounted on a base. The first end of the conveying adjustment device is connected to the support frame and can rise or fall. The second end of the conveying adjustment device is rotatably connected to the two supporting side walls of the lower drive roller assembly and is located between the two supporting side walls. The second end of the conveying adjustment device is at a predetermined distance from the drive roller. The conveying device is slidably mounted on the conveying adjustment device. The control device is electrically connected to the conveying adjustment device and the conveying device. The control device controls the height of the first end of the conveying adjustment device and the conveying speed of the conveying device according to the specifications of the machine-made quartz sand, so that machine-made quartz sand of different specifications enters the grinding gap between the driven roller assembly and the lower drive roller assembly at corresponding speeds and angles.

6. The torque roller mill for pre-grinding machine-made quartz sand as described in claim 5, characterized in that: The conveying adjustment device includes a support plate, a sliding plate, a lifting device, and a sliding plate drive device. The lifting device, the sliding plate drive device, and the control device are electrically connected. The lifting device is fixed on the support frame. The lifting end of the lifting device is rotatably connected to the first end of the support plate. The second end of the support plate is rotatably connected to the two support side walls of the lower drive roller assembly, and the second end of the support plate is located between the two support side walls. The sliding plate is slidably mounted on the support plate. The sliding plate drive device is fixed to the first end of the support plate and connected to the sliding plate. The conveying device is fixed on the sliding plate and is closer to the drive roller than the sliding plate. The sliding plate drive device drives the sliding plate to move along the length of the support plate so that the conveying device moves closer to or further away from the drive roller.

7. The torque roller mill for pre-grinding machined quartz sand as described in claim 6, characterized in that: The lifting device includes a third motor, a first lead screw, a first threaded sleeve that cooperates with the first lead screw, and a bearing plate connector. The third motor is fixed on the support frame and located above the bearing plate. The rotating end of the third motor is fixedly connected to one end of the first lead screw. The third motor is also electrically connected to the control device. The first threaded sleeve is fitted on the first lead screw and is fixedly connected to one end of the bearing plate connector. The other end of the bearing plate connector is connected to the first end of the bearing plate through a pivoting mechanism. The sliding plate driving device includes a second lead screw, a second threaded sleeve, and a fourth motor. The fourth motor is fixedly connected to the first end of the bearing plate. The second threaded sleeve is fixed on the surface of the sliding plate opposite to the bearing plate. The second threaded sleeve is also fitted on the second lead screw. The fourth motor is also electrically connected to the control device. The rotating end of the fourth motor is fixedly connected to one end of the second lead screw. A T-shaped slide rail is provided on the surface of the bearing plate opposite to the sliding plate. A groove that cooperates with the T-shaped slide rail is provided on the corresponding surface of the sliding plate opposite to the bearing plate. The sliding plate moves smoothly through the T-shaped slide rail and the groove.

8. The torque roller mill for pre-grinding machined quartz sand as described in claim 7, characterized in that: The machine-made quartz sand conveying device also includes a hopper, which is fixed on the support frame and located above the conveying device. The hopper continuously and quantitatively supplies the stored machine-made quartz sand to the conveying device, which is a belt conveyor. The conveying device is fixedly connected to the sliding plate through the support arm.

Images