Fine particle roller screen with screen surface material flow distribution regulation function and control method thereof

Abstract

The application discloses a fine particle roller screen with a screen surface material flow distribution regulation function and a control method thereof. The fine particle roller screen comprises a fine particle roller screen body, an inner frame, an outer frame, an inner-outer frame connecting device, a pitch regulation device, a swing regulation device, a front support frame and a rear support frame. The fine particle roller screen body is installed on the inner frame. The inner frame is rotatably connected with the outer frame. The outer frame is hingedly connected with the front support frame and the rear support frame. The fine particle roller screen body is internally provided with an ultrasonic ranging sensor and a linear array laser sensor. The pitch regulation device can adjust the pitch angle of the inner frame relative to the outer frame according to the feedback signal of the ultrasonic ranging sensor. The swing regulation device can adjust the rotation angle of the outer frame according to the feedback signal of the linear array laser sensor. The self-adaptive control of the roller screen is controlled through the detection of the sensor, and the efficiency of the screening operation is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a cross-type fine particle roller screen, in particular to a fine particle roller screen with a screen surface material flow distribution regulation function and a control method thereof. BACKGROUND

[0002] The fine particle roller screen is a screening device suitable for wet fine raw coal dry method deep screening, and has a wide application prospect in power plants, coal mines, coal preparation plants and other industries. The existing fine particle roller screen. When the working conditions such as feed rate change, the fixed screen surface inclination angle often cannot obtain good screening effect, and when the material is unevenly distributed on the screen surface, in addition to reducing the screening performance, the screen plate will also be unevenly worn, reducing the service life of the screen surface. SUMMARY

[0003] In view of the above technical deficiencies, the purpose of the present application is to provide a fine particle roller screen with a screen surface material flow distribution regulation function and a control method thereof.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] The present application provides a fine particle roller screen with a screen surface material flow distribution regulation function, which comprises a fine particle roller screen body, an inner frame, an outer frame, an inner-outer frame connecting device, a pitch regulation device, a swing regulation device, a front support frame, and a rear support frame. The cross-type fine particle roller screen body is installed on the inner frame, the inner frame and the outer frame are rotatably connected through the inner-outer frame connecting device, the front and rear ends of the outer frame are hingedly connected with the front support frame and the rear support frame respectively, forming a rotatable outer frame. One end of the pitch regulation device is fixed with the rear support frame, and the other end of the pitch regulation device away from the rear support frame is fixed with the inner frame. The swing regulation device is fixed with the outer frame. An ultrasonic ranging sensor for detecting the material thickness on the screen surface of the cross-type fine particle roller screen body and a linear array laser sensor for detecting the left and right distribution of the material on the screen surface are installed in the cross-type fine particle roller screen body. The pitch regulation device can adjust the pitch angle of the inner frame relative to the outer frame when the inner-outer frame connecting device is the hinged point according to the feedback signal of the ultrasonic ranging sensor. The swing regulation device can adjust the rotation angle of the outer frame according to the feedback signal of the linear array laser sensor.

[0006] Preferably, the fine particle roller screen body comprises a screen box mounted on the inner frame, a screen roller assembly is mounted in the screen box, the fine particle roller screen body is provided with a feeding port communicated with the screen box at one end close to the rear support frame, the screen box is communicated with a discharging port at one end close to the front support frame, a driving assembly for driving the screen roller assembly to rotate is mounted on the screen box, the driving assembly comprises a motor and a motor bracket, the motor is fixed with the motor bracket by bolts, the motor bracket is arranged on both sides of the inner frame in a staggered manner and is fixed with the inner frame by bolts, the tail end of the motor is arranged away from the outer frame, the screen roller assembly comprises a screen shaft, a circular screen piece, a spacer sleeve and a bearing seat, the circular screen piece is mounted on the screen shaft, the spacer sleeve is mounted on the screen shaft and located between two adjacent circular screen pieces, the bearing seat is symmetrically mounted on the inner frame, and both ends of the screen shaft are correspondingly mounted on the bearing seat, and an inclination sensor for detecting the pitch angle of the inner frame relative to the outer frame is mounted on the inner frame; the linear array laser sensor is connected with the screen box through a gear and rack mechanism.

[0007] Preferably, the screen box comprises a baffle, a rear blocking plate and an observation window, the baffle is symmetrically fixed on the inner frame and comprises two left and right baffles, the rear blocking plate is mounted at one end of the baffle close to the feeding port, the feeding port is mounted on the baffle by bolts, the discharging port is welded on the baffle, and the observation window is hingedly connected with the baffle.

[0008] Preferably, the linear array laser sensor comprises five laser radars, the five laser radars are equidistantly mounted on the rotating shaft through a rotary table, the gear and rack mechanism comprises a gear and rack mechanism connecting seat mounted on the baffle, a rotating shaft connecting seat mounted on the gear and rack mechanism connecting seat and a rack structure, one end of the rotating shaft is provided with a gear corresponding to the rack structure, and the gear and rack mechanism connecting seat is provided with a linear motor for driving the rack structure to reciprocate.

[0009] Preferably, the side of the feeding port close to the discharging port is provided with an ultrasonic ranging sensor mounting plate, and the ultrasonic ranging sensor is equidistantly mounted on the ultrasonic ranging sensor mounting plate and corresponds to the screen surface formed by the screen roller assembly.

[0010] Preferably, the inner frame comprises an inner frame short I-beam, an inner frame long I-beam and an inner frame connecting sleeve, the inner frame short I-beam and the inner frame long I-beam are fixed by the inner frame connecting sleeve at the joint of the end heads to form a rectangular inner frame, and a lifting eye is welded on the inner frame long I-beam for lifting; the outer frame comprises an outer frame long I-beam, an outer frame short I-beam and a spacer plate, the outer frame short I-beam is spliced with the outer frame long I-beam through the spacer plate to form a rectangular outer frame; the inner and outer frame connecting device comprises a female cantilever beam and a male cantilever beam which cooperatively form a rotary structure, the female cantilever beam is welded with the inner frame channel steel, and the inner frame channel steel is connected with the inner frame long I-beam by bolts; the male cantilever beam is welded with the outer frame channel steel, and the outer frame channel steel is connected with the outer frame long I-beam by bolts.

[0011] Preferably, the protruding shaft of the convex cantilever beam overlaps the concave cantilever beam to form a rotatable structure.

[0012] Preferably, the pitch control device includes a pitch hydraulic cylinder connecting seat, a pitch hydraulic cylinder, and a top plate. The pitch hydraulic cylinder is fixed to the pitch hydraulic cylinder connecting seat by a pin. The two ends of the pitch hydraulic cylinder connecting seat are fixed to the top plate and the inner frame, respectively. The top plate is fixed to the outer frame.

[0013] Preferably, the swing control device includes a swing hydraulic cylinder connecting seat, a displacement sensor, and a swing hydraulic cylinder. The swing hydraulic cylinder is fixed to the swing hydraulic cylinder support seat via a second pin. The displacement sensor is mounted on the swing hydraulic cylinder and corresponds to the swing hydraulic cylinder connecting seat. The swing hydraulic cylinder connecting seat is fixed to the outer frame.

[0014] The present invention also provides a control method for the above-mentioned fine-particle roller screen, comprising the following steps:

[0015] (1) The material on the screen surface is scanned by a linear array laser sensor to analyze the distribution type of the material. When the laser sensor determines whether the material flow is unevenly distributed, the shape of the screen surface when there is no material is first obtained. Then, the laser sensor is continuously scanned to obtain the overall shape of the material on the roller screen. The overall shape of the material on the screen surface is then processed to remove the undulations caused by the screen shaft. When the five laser sensors scan a certain cross section, the five values ​​of this cross section are averaged. When the difference between the maximum value and the average value of these five values ​​is greater than 50mm, it is determined that the material flow is unevenly distributed. When the difference between the data obtained by the leftmost laser sensor and the average value is the largest, the material is determined to be gathering to the left. In this case, the controller controls the swing adjustment device to flip and level the material to the right. When the difference between the data obtained by the rightmost laser sensor and the average value is the largest, the material is determined to be gathering to the right. In this case, the controller controls the swing adjustment device to flip and level the material to the left until the material is properly adjusted. Similarly, as long as it is known which sensor's data has the largest difference from the average value of these five laser sensors, it is known where the material flow distribution is uneven.

[0016] (2) After the material is leveled, the thickness of the material on the screen surface at the inlet is detected by an ultrasonic ranging sensor. The judgment condition is whether the thickness of the screen surface layer is between 3 and 6 times the particle size of the material. When the thickness of the screen surface layer is less than 3 times the particle size of the material, the pitch control device is controlled by the controller to reduce the pitch angle. When the thickness of the screen surface layer is greater than 6 times the particle size, the pitch control device is controlled by the controller to increase the pitch angle until the thickness of the screen surface layer is between 3 and 6 times the particle size of the material.

[0017] Beneficial effects

[0018] (1) When the material flow distribution on the screen surface is uneven, the present invention can make the outer frame of the cross screen swing left and right through the swing control device, thereby adjusting the uneven material flow distribution, enhancing the unit screen surface processing capacity of the cross screen and reducing the local wear caused by the uneven material flow distribution on the cross screen.

[0019] (2) When the amount of material to be processed on the screen surface of the roller screen is too small, the present invention can adjust the inclination angle of the screen surface from the inlet to the outlet by adjusting the pitch control device to make the inner frame of the cross screen pitch up and down.

[0020] (3) The present invention can increase the screen inclination angle by means of the pitch control device when the material flow rate is too low; and decrease the screen inclination angle by means of the pitch control device when the material flow rate is too high.

[0021] (4) The present invention can achieve adaptive control of cross screen by using ultrasonic ranging sensor, linear array laser sensor and tilt sensor, thereby effectively improving the efficiency of screening operation and increasing the service life of screen surface. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the fine-particle roller screen with screen fabric flow distribution control function of the present invention;

[0024] Figure 2 This is a right view of the fine-particle roller screen with screen fabric flow distribution control function of the present invention;

[0025] Figure 3 This is a schematic diagram of the main structure of the roller screen of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection between the observation window and the baffle of the present invention.

[0027] Figure 5 This is a schematic diagram of the internal frame structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection between the inner frame and the outer frame of the present invention;

[0029] Figure 7 This is a schematic diagram of the inner and outer frame connection device of the present invention;

[0030] Figure 8This is a schematic diagram of the pitch control device of the present invention;

[0031] Figure 9 This is a schematic diagram of the swing control device of the present invention;

[0032] Figure 10 This is a flowchart of the control action of the present invention;

[0033] Figure 11 This is a schematic diagram of the control circuit of the present invention;

[0034] Figure 12 This is a schematic diagram of the sensor input and output interface circuit of the present invention;

[0035] In the diagram, 1. Fine particle roller screen body; 11. Feed inlet; 111. Ultrasonic ranging sensor mounting plate; 12. Discharge outlet; 13. Screen roller assembly; 131. Screen shaft; 132. Circular screen plate; 133. Spacer; 134. Bearing seat; 14. Drive assembly; 141. Motor; 142. Motor frame; 15. Screen box; 151. Baffle; 152. Rear blocking plate; 153. Observation window; 154. Hinge; 16. Linear array laser sensor; 161. Turntable; 162. Rotating shaft; 17. Ultrasonic ranging sensor; 18. Tilt sensor; 19. Gear and rack mechanism; 191. Linear motor; 192. Gear and rack mechanism connecting seat; 193. Rotating shaft connecting seat; 194. Rack. Structure; 195. Gear; 2. Inner frame; 21. Inner frame connecting sleeve; 22. Lifting ring; 23. Inner frame short I-beam; 24. Inner frame long I-beam; 3. Outer frame; 31. Pad plate; 32. Outer frame long I-beam; 33. Outer frame short I-beam; 4. Inner and outer frame connecting device; 41. Notched cantilever beam; 42. Convex cantilever beam; 43. Outer frame channel steel; 44. Inner frame channel steel; 5. Pitch control device; 51. Pitch hydraulic cylinder connecting seat; 52. Pitch hydraulic cylinder; 53. Top plate; 54. Pin shaft one; 6. Swing control device; 61. Swing hydraulic cylinder connecting seat; 62. Displacement sensor; 63. Swing hydraulic cylinder; 64. Pin shaft two; 7. Front support frame; 8. Rear support frame. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] like Figure 1 and Figure 2As shown, this embodiment provides a fine-particle roller screen with a screen fabric flow distribution control function, including a cross-type fine-particle roller screen body 1, an inner frame 2, an outer frame 3, an inner and outer frame connecting device 4, a pitch control device 5, a swing control device 6, a front support frame 7, and a rear support frame 8. The fine-particle roller screen body 1 is mounted on the inner frame 2, and the inner frame 2 and the outer frame 3 are rotatably connected by the inner and outer frame connecting device 4. The pitch control device 5 is located at the rear end of the fine-particle roller screen body 1, and its upper end is mounted on the inner frame 2. The swing control device 6 is located on both sides of the outer frame and is hinged to the outer frame 3, used to realize the left and right swing of the fine-particle roller screen body 1. The upper end of the front support frame 7 is hinged to the outer frame 3, and the bottom end of the front support frame 7 is fixed to the ground. The upper end of the rear support frame 8 is hinged to the rear end of the outer frame 3, and the bottom end of the rear support frame 8 is fixed to the ground. The lower end of the pitch control device 5 is fixed to the outer frame 3 through a top plate 53.

[0039] like Figure 3 As shown, the fine-particle roller screen body 1 includes an inlet 11, an outlet 12, a screen roller assembly 13, a drive assembly 14, a screen box 15, a linear array laser sensor 16, an ultrasonic ranging sensor 17, an tilt sensor 18, a gear and rack mechanism 19, and a linear motor 191. The inlet 11 is located at the rear end of the screen roller assembly 13, and the outlet 12 is located at the front end of the screen roller assembly 13. The screen roller assembly 13 is installed inside the screen box 15. The inlet 11, which communicates with the screen box 15, is provided at one end of the fine-particle roller screen body 1 near the rear support frame 8. The outlet 12 is connected to one end of the screen box 15 near the front support frame 7. The drive assembly 14, which drives the screen roller assembly 13 to rotate, is installed on the screen box 15. The drive assembly 14 includes a motor 141 and a motor frame 142. The motor 141 is fixed to the motor frame 142 by bolts. The motor frame 142 is staggered. The inner frame 2 is placed on both sides and fixed to it with bolts. The staggered arrangement can make the weight of the inner frame 2 relatively evenly distributed. The tail end of the motor 141 is arranged away from the outer frame 3, which can avoid interference between the motor 141 and the outer frame 3 when swinging. The screen roller assembly 13 includes a screen shaft 131, a circular screen plate 132, a spacer 133, and a bearing seat 134. The circular screen plate 132 is installed on the screen shaft 131, and the spacer 133 is installed on the screen shaft 131 and located between two adjacent circular screen plates 132. The bearing seat 134 is symmetrically installed on the inner frame 2, and the two ends of the screen shaft 131 are correspondingly installed on the bearing seat 134. The inner frame 2 is equipped with an tilt sensor 18 for detecting its pitch angle relative to the outer frame (3). The linear array laser sensor 16 is connected to the screen box 15 through a gear and rack mechanism 19. Figure 2As can be seen, the front support frame 7 is installed on the outer frame 3 near the discharge port 12, and the rear support frame 8 is installed on the outer frame 3 near the inlet 11. The two support frames have different shapes, allowing the roller screen to have a certain initial pitch angle. When the fine particle roller screen needs to be oscillated for adjustment, the oscillation hydraulic cylinder can achieve the oscillation adjustment action through these two support frames. The screen box 15 includes a baffle 151, a rear blocking plate 152, and an observation window 153. The baffle 151 consists of two pieces, left and right, symmetrically fixed on the inner frame 2. The rear blocking plate 152 is installed on the end of the baffle 151 near the inlet 11. The inlet 11 is bolted to the baffle 151, and the discharge port 12 is welded to the baffle 151. Figure 4As can be seen from the diagram, the observation window 153 and the baffle 151 are hinged together by a hinge 154. The hinge 154 in this embodiment is a known existing product or structure, and when the observation window 153 is closed, the hinge 154 can support the observation window 153 and the baffle 151 to form a 90-degree support structure, preventing the two observation windows 153 from collapsing inwards. The screen box 15 is provided to prevent large pieces of material from splashing out during the operation of the fine-particle roller screen. The linear array laser sensor 16 includes five lidars, which are equidistantly mounted on a rotating shaft 162 via a turntable 161. The gear and rack mechanism 19 includes a gear and rack mechanism connecting seat 192 on a baffle 151, a rotating shaft connecting seat 193 on the gear and rack mechanism connecting seat 192, and a rack structure 194. A gear 195 corresponding to the rack structure 194 is mounted on the side of the rotating shaft 162 near the rotating shaft connecting seat 193. A linear motor 191 for driving the rack structure 194 to reciprocate is mounted on the gear and rack mechanism connecting seat 192. Linear motor 191 drives rack and pinion structure 194 to rotate, which in turn drives gear 195 to rotate. Gear 195 rotates, which drives shaft 162 to rotate, which in turn drives turntable 161 to rotate. The rotation of turntable 161 drives linear array laser sensor 16 to scan the material in the screen box. When the laser sensor determines whether the material flow is uneven, it first obtains the shape of the screen surface when there is no material. Then, the laser sensor continuously scans to obtain the overall shape of the material on the roller screen. The overall shape of the material on the screen surface is then processed to remove the undulations caused by the screen shaft. When the five laser sensors scan a certain cross section, the five values ​​of this cross section are averaged. When the difference between the maximum value and the average value is greater than 50mm, it is determined that the material flow is uneven. When the difference between the data obtained by the leftmost laser sensor and the average value is the largest, the material is determined to be converging to the left. The controller then controls the oscillating adjustment device 6 to flip and level the material to the right. Conversely, when the difference between the data obtained by the rightmost laser sensor and the average value is the largest, the material is determined to be converging to the right. The controller then controls the oscillating adjustment device 6 to flip and level the material to the left until the material is properly adjusted. Similarly, by identifying which sensor's data has the largest difference from the average value of all five laser sensors, the location of the uneven material flow distribution can be determined. When the material flow distribution is uneven, the oscillating adjustment device is controlled to level the material.An ultrasonic ranging sensor mounting plate 111 is provided on the side of the feed inlet 11 near the discharge outlet 12. Three ultrasonic ranging sensors 17 are installed on the ultrasonic ranging sensor mounting plate 111 at equal intervals and correspond to the screen surface formed by the screen roller assembly 13. The ultrasonic ranging sensors 17 emit ultrasonic waves and measure the material thickness on both sides and in the middle of the screen corresponding to the feed inlet by measuring the time it takes for the ultrasonic waves to return after contacting the material. The average value of the three received signals is taken. When the average value is less than 3 times the particle size of the material, it is determined that the material thickness is too thin, and the tilt angle is reduced by the pitch control device 5. When the average value is greater than 6 times the particle size of the material, it is determined that the material thickness is too thick, and the tilt angle is increased by the pitch control device 5.

[0040] like Figure 4 As shown, the inner frame 2 includes a short I-beam 23, a long I-beam 24, and a connecting sleeve 21. The ends of the short I-beam 23 and the long I-beam 24 are fixedly connected by the connecting sleeve 21, forming a rectangular inner frame 2. Lifting rings 22 for hoisting are welded onto the long I-beam 24. The end of the inner frame 2 near the feed inlet 11 is connected to the pitch hydraulic cylinder connecting seat 51 of the pitch control device 5 using bolts. The fine particle roller screen body 1 is installed on the inner frame 2. When the inner frame 2 and the fine particle roller screen body 1 on the inner frame 2 need to be connected to the inner and outer frame connecting device 4, they are hoisted into the outer frame 3 for installation using the lifting rings 22.

[0041] like Figure 5 As shown, the outer frame 3 includes long I-beams 32 and short I-beams 33, which together form a rectangular outer frame 3. Specifically, the outer frame includes eight base plates 31, a pair of long I-beams 32, and a pair of short I-beams 33, which are installed by overlapping. The eight base plates 31 are placed at the overlap of the two pairs of I-beams and welded for reinforcement. The middle of the pair of long I-beams 32 is connected to the swing hydraulic cylinder connecting seat 61 of the swing control device 6 by bolts. The middle of the middle of the pair of short I-beams 33 is connected to the front support frame 7 and the rear support frame 8 by bolts.

[0042] like Figure 6 As shown, the connecting device 4 includes a recessed cantilever beam 41 and a convex cantilever beam 42. The recessed cantilever beam 41 is installed by bolting to the inner frame; the convex cantilever beam 42 is fixed to the outer frame by bolts. One end of the recessed cantilever beam 41 is welded to the inner frame channel steel 44, and one end of the convex cantilever beam 42 is welded to the outer frame channel steel 43. The inner frame channel steel 44 is then fixed to the inner frame long I-beam 24 by bolts, and the outer frame channel steel 43 is also fixed to the outer frame long I-beam 32 by bolts.

[0043] like Figure 7As shown, the pitch control device 5 includes a pitch hydraulic cylinder connecting seat 51, a pitch hydraulic cylinder 52, and a top plate 53. The pitch hydraulic cylinder 52 is fixed to the pitch hydraulic cylinder connecting seat 51 via a pin 54. The two ends of the pitch hydraulic cylinder connecting seat 51 are fixed to the top plate 53 and the inner frame 2, respectively. The top plate 53 is fixed to the outer frame 3. A pair of pitch hydraulic cylinders 52 are mounted side by side on the inner frame 2 and the top plate 53 via four pitch hydraulic cylinder connecting seats 51. The two pairs of pitch hydraulic cylinders 52 are connected to the pitch hydraulic cylinder connecting seats 51 via pin 54. The four pitch hydraulic cylinder connecting seats 51 are fixed to the inner frame 2 and the top plate 53 respectively via bolts. The top plate 53 is fixed to the outer frame 3 by welding. When the roller screen needs to perform a pitching action, the pitch hydraulic cylinder connecting seat 51 remains stationary relative to the top plate 53, the hydraulic cylinder extension rod extends, and the pitch hydraulic cylinder 52 pushes the inner frame 2 to rotate along the rotation point formed by the inner and outer frame connecting device 4, thereby realizing the pitch control of the roller screen.

[0044] In this embodiment, the control swing adjustment device 6, pitch adjustment device 5, ultrasonic ranging sensor 17, linear array laser sensor 16, tilt sensor 18, linear motor 191, and drive assembly 14 are all electrically connected to existing controllers known to those skilled in the art. All devices and structures in this embodiment not described in detail are existing structures known to those skilled in the art, and connections not described in detail also employ existing connection methods known to those skilled in the art; therefore, they will not be described in detail here.

[0045] like Figure 2 As shown, when performing precise control of pitch motion in this plane, let A be the distance between the rotation center of the inner and outer frame connecting device 4 and the hinge point of the pitch hydraulic cylinder 52 and the top plate 53 on the same plane, let B be the distance between the rotation center of the inner and outer frame connecting device 4 and the hinge point of the pitch hydraulic cylinder connecting seat 51 and the inner frame 2, let C be the initial length of the pitch hydraulic cylinder, and let y be the extension length of the pitch hydraulic cylinder. A, B, and C are obtained by measurement.

[0046] The initial angle is θ1

[0047]

[0048] After pitch adjustment, the angle is θ1 + θ2

[0049]

[0050] The relationship between the pitch angle θ2 and the extension amount y of the pitch hydraulic cylinder can be obtained.

[0051] like Figure 8As shown, the swing control device 6 includes a swing hydraulic cylinder connecting seat 61, a displacement sensor 62, and a swing hydraulic cylinder 63. The swing hydraulic cylinder 63 is fixed to the swing hydraulic cylinder support seat 61 via a second pin 64. The displacement sensor 62 is mounted on the swing hydraulic cylinder 63 and corresponds to the swing hydraulic cylinder connecting seat 61. The swing hydraulic cylinder connecting seat 61 is fixed to the outer frame 3. Specifically, the swing control device 6 includes a pair of swing hydraulic cylinders 63 and four swing hydraulic cylinder connecting seats 61. The two swing hydraulic cylinders 63 are arranged in series, and each swing hydraulic cylinder 63 is connected to the two swing hydraulic cylinder connecting seats 61 via a second pin 64. The swing hydraulic cylinder connecting seats 61 are connected to the outer frame 3 and the ground respectively via bolts. When the cross screen needs to be swing-adjusted, the push rod of one swing hydraulic cylinder 63 extends and the push rod of the corresponding other swing hydraulic cylinder 63 retracts. Then, through the rotation structure formed by the front support frame 7, the rear support frame 8, and the outer frame 3, the swing action of the roller screen is completed. The displacement sensor 62 can monitor the movement of the hydraulic rod, thereby achieving quantitative and precise control of the swing action.

[0052] like Figure 8 As shown, when precisely controlling the swinging motion in this plane, let a be the distance from the hinge point of the front support frame 7 to the hinge point of the support swing hydraulic cylinder 63 in contact with the ground support frame, b be the distance from the hinge point of the front support frame 7 to the hinge point of the swing hydraulic cylinder 63 and the swing hydraulic cylinder connecting seat 61, c be the initial height of the swing hydraulic cylinder 63, and x be the extension length of the swing hydraulic cylinder, where a, b, and c are obtained by measurement.

[0053] The initial angle is β1

[0054]

[0055] The angle after swinging is β1+β2

[0056]

[0057] Therefore, the relationship between the swing angle β2 and the extension amount x of the swing hydraulic cylinder is obtained.

[0058] like Figures 9-10As shown, during the roller screen operation control, the linear array laser sensor 16 first scans the material on the screen surface to analyze the material distribution type. When the material is determined to be gathering to the left, the swing control device 6 is controlled to flip to the right to level the material; when the material is determined to be gathering to the right, the swing control device 6 is controlled to flip to the left to level the material. Since the linear array laser sensor 16 continuously detects and analyzes, it will continue to operate until the material is leveled. After the material is leveled, the ultrasonic ranging sensor 17 detects the material thickness. The judgment condition is whether the thickness of the screen surface layer detected by the ultrasonic ranging sensor 17 is between 3 and 6 times the particle size of the material. When the detected screen surface layer thickness is less than 3 times the particle size, it indicates that the material is being screened as a thin layer, so the pitch control device 5 decreases the pitch angle; when the detected screen surface layer thickness is greater than 6 times the particle size, it indicates that the material is being screened as a thick layer, so the pitch control device 5 increases the pitch angle until the screen surface layer thickness is adjusted to the normal thickness for screening.

[0059] like Figures 11-12The diagram shows the control circuit and sensor input / output interface connection of this invention. In this embodiment, the controller uses an STM32 microcontroller. The MCU section defines the pins and basic peripheral circuitry; the ETH section is the network port used for data interaction with a switch; the DAP section is the program download port; the NRST section is the reset button; the RS485 is the ultrasonic ranging sensor section, with the upper part being the STM32 peripheral circuitry and the lower part being the interface for connecting to the sensor. RS485-A and RS485-B are two signal lines, with four pins on the STM32 connected to the four wires of the ultrasonic ranging sensor, thus enabling signal acquisition from the ultrasonic ranging sensor. The RS232 is the tilt sensor section, with the upper part being the STM32 peripheral circuitry and the lower part being the interface for connecting to the sensor. RS232_RX_O0 and RS232_TX_O0 are two signal lines, with four pins on the STM32 connected to the four wires of the sensor. This enables data acquisition from the tilt sensor and subsequent data processing within the STM32 microcontroller. The CAN_Motor section represents the linear motor. External pins 1, 2, 3, and 4 connect to the CANH, CANL, +24V power, and ground wires on the circuit board. Internal pins 1, 2, 3, and 4 correspond to the positive and negative terminals of the tilt sensor, and are used for signal reception and transmission. The Input section's signal acquisition circuit diagram shows that, for example, the external device signal EDI1+ is first converted to RDI1 by a quadrupole transistor U6. RDI1 then passes through a rectifier chip U13 to the STM32 interface and enters the microcontroller, thus completing the sensor signal input. The Output section corresponds to two pairs of pitch hydraulic cylinders and two pairs of swing hydraulic cylinders. For example, when the pitch control device is activated, if the positive terminal of DO1 in the STM32 is connected to the positive terminal of the hydraulic rod, and the negative terminal of DO1 is connected to the negative terminal of the hydraulic rod, the hydraulic rod extends; if the positive terminal of DO2 in the STM32 is connected to the negative terminal of the hydraulic rod, and the negative terminal of DO2 is connected to the positive terminal of the hydraulic rod, the hydraulic rod retracts. When the swing control device is activated, if the positive terminal of DO3 in the STM32 is connected to the negative terminal of the hydraulic rod, and the negative terminal of DO3 in the STM32 is connected to the positive terminal of the hydraulic rod, one hydraulic rod will extend and the other hydraulic rod will retract, thereby enabling the swing control device to flip to one side. Similarly, if the wiring is reversed, the swing control device can be flipped to the other side.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes that can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention are all within the protection scope of the claims of the present invention.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A fine particle roller screen having a screen surface material flow distribution regulating function, characterized by: The fine particle roller screen body (1), the inner frame (2), the outer frame (3), the inner-outer frame connecting device (4), the pitch control device (5), the swing control device (6), the front support frame (7), the rear support frame (8), the fine particle roller screen body (1) is installed on the inner frame (2), the inner frame (2) and the outer frame (3) are rotatably connected through the inner-outer frame connecting device (4), the front and rear ends of the outer frame (3) are hingedly connected with the front support frame (7) and the rear support frame (8) respectively, forming a rotatable outer frame, one end of the pitch control device (5) is fixed with the rear support frame (8), the other end of the pitch control device (5) away from the rear support frame (8) is fixed with the inner frame (2), the swing control device (6) is fixed with the outer frame (3), the fine particle roller screen body (1) is internally provided with an ultrasonic ranging sensor (17) for detecting the material thickness on the screen surface and a linear array laser sensor (16) for detecting the left-right distribution condition of the material on the screen surface, the pitch control device (5) can adjust the pitch angle of the inner frame (2) relative to the outer frame (3) when the inner-outer frame connecting device (4) is the hinged point according to the signal fed back by the ultrasonic ranging sensor (17), and the swing control device (6) can adjust the rotation angle of the outer frame (3) according to the feedback signal of the linear array laser sensor (16); The fine particle roller screen body (1) includes a screen box (15) installed on the inner frame (2), the screen box (15) is internally provided with a screen roller assembly (13), one end of the fine particle roller screen body (1) close to the rear support frame (8) is provided with a feeding port (11) communicated with the screen box (15), one end of the screen box (15) close to the front support frame (7) is communicated with a discharging port (12), and the screen box (15) is installed with a driving assembly (14) for driving the screen roller assembly (13) to rotate; The inner frame (2) is installed with an inclination sensor (18) for detecting the pitch angle relative to the outer frame (3); the linear array laser sensor (16) is connected with the screen box (15) through a gear and rack mechanism (19); The feeding port (11) is provided with an ultrasonic ranging sensor mounting plate (111) on the side close to the discharging port (12), the ultrasonic ranging sensor (17) is installed on the ultrasonic ranging sensor mounting plate (111) in three equidistant positions and corresponds to the screen surface formed by the screen roller assembly (13).

2. A fine particle rolling apron screen having a screen deck material flow distribution control function as claimed in claim 1, characterized in that: The driving assembly (14) comprises a motor (141) and a motor frame (142), the motor (141) is fixed with the motor frame (142) through bolts, the motor frame (142) is staggered and arranged on both sides of the inner frame (2) and is fixed with the inner frame (2) through bolts, the tail end of the motor (141) is arranged away from the side of the outer frame (3), the screen roller assembly (13) comprises a screen shaft (131), a circular screen piece (132), a spacer sleeve (133) and a bearing seat (134), the circular screen piece (132) is installed on the screen shaft (131), the spacer sleeve (133) is installed on the screen shaft (131) and is located between two adjacent circular screen pieces (132), and the bearing seat (134) is symmetrically installed on the inner frame (2), and both ends of the screen shaft (131) are correspondingly installed on the bearing seat (134).

3. A fine particle rolling cloth screen having a screen surface material flow distribution regulating function according to claim 2, characterized in that: The screen box (15) comprises baffles (151), a rear blocking plate (152) and an observation window (153), the baffles (151) are symmetrically fixed on the inner frame (2), the rear blocking plate (152) is installed on one end of the baffle (151) close to the inlet (11), the inlet (11) is installed on the baffle (151) through bolts, the outlet (12) is welded on the baffle (151), and the observation window (153) is hinged with the baffle (151).

4. A fine particle rolling cloth screen having a screen surface material flow distribution regulating function according to claim 3, characterized in that: The linear array laser sensor (16) comprises five laser radars, the five laser radars are equidistantly installed on the rotating shaft (162) through the rotating table (161), the gear and rack mechanism (19) comprises a gear and rack mechanism connecting seat (192) installed on the baffle (151), a rotating shaft connecting seat (193) installed on the gear and rack mechanism connecting seat (192) and a rack structure (194), a gear (195) corresponding to the rack structure (194) is installed on one side of the rotating shaft (162) close to the rotating shaft connecting seat (193), and a linear motor (191) for driving the rack structure (194) to reciprocate is installed on the gear and rack mechanism connecting seat (192).

5. A fine particle rolling apron screen having a screen deck material flow distribution control function as claimed in claim 1, characterized in that: The inner frame (2) comprises inner frame short I-beams (23), inner frame long I-beams (24) and an inner frame connecting sleeve (21), the inner frame short I-beams (23) and the inner frame long I-beams (24) are fixed by welding at the end connection through the inner frame connecting sleeve (21) to form a rectangular inner frame (2), and a lifting ring (22) for lifting is welded on the inner frame long I-beam (24); the outer frame (3) comprises outer frame long I-beams (32), outer frame short I-beams (33) and spacers (31), the outer frame short I-beams (33) are welded with the outer frame long I-beams (32) through the spacers (31) to form a rectangular outer frame (3); the inner and outer frame connecting device (4) comprises a notched cantilever beam (41) and a protruding cantilever beam (42) which form a rotary structure by cooperation, the notched cantilever beam (41) is connected with the inner frame long I-beam (24) through bolts; and the protruding cantilever beam (42) is connected with the outer frame long I-beam (32) through bolts.

6. A fine particle rolling cloth screen having a screen surface material flow distribution regulating function according to claim 5, characterized in that: The protruding shaft of the protruding cantilever beam (42) is lapped on the recessed cantilever beam (41) to form a rotatable structure.

7. A fine particle rolling cloth screen having a screen surface material flow distribution control function according to claim 1, characterized in that: The pitch control device (5) comprises a pitch hydraulic cylinder connecting seat (51), a pitch hydraulic cylinder (52) and a top plate (53), the pitch hydraulic cylinder (52) is fixed with the pitch hydraulic cylinder connecting seat (51) through a pin shaft (54); the two ends of the pitch hydraulic cylinder connecting seat (51) are fixed with the top plate (53) and the inner frame (2) respectively; the top plate (53) is fixed with the outer frame (3).

8. A fine particle rolling apron screen having a screen deck material flow distribution control function as claimed in claim 1, characterized by: The swing control device (6) comprises a swing hydraulic cylinder connecting seat (61), a displacement sensor (62) and a swing hydraulic cylinder (63), the swing hydraulic cylinder (63) is fixed with the swing hydraulic cylinder connecting seat (61) through a pin shaft (64); the displacement sensor (62) is installed on the swing hydraulic cylinder (63) and corresponds to the swing hydraulic cylinder connecting seat (61); the swing hydraulic cylinder connecting seat (61) is fixed with the outer frame (3).

9. A control method of a fine particle roller screen having a screen surface material flow distribution regulating function according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: The material on the screen surface is scanned by the linear array laser sensor (16), so as to analyze the distribution type of the material, when the laser sensor judges whether the material flow is unevenly distributed, firstly, the shape of the screen surface without material is obtained, then the overall shape of the material on the screen surface of the roller screen is obtained through continuous scanning of the laser sensor, the overall shape of the material can be obtained by processing the fluctuation of the material on the screen surface caused by the screen shaft; when the five laser sensors scan a certain cross section, the average of the five values of the cross section is taken, when the difference between the maximum value and the average value in the five values is greater than 50 mm, it is judged that the material flow is unevenly distributed; when the difference between the data obtained by the leftmost laser sensor and the average value is the largest, the material is judged to be gathered to the left, then the swing control device (6) is controlled to overturn the material to the right by the controller; when the difference between the data obtained by the rightmost laser sensor and the average value is the largest, when the material is judged to be gathered to the right, the swing control device (6) is controlled to overturn the material to the left, until the material is adjusted; When the material is leveled, the thickness of the material on the screen surface corresponding to the feeding port (11) is detected by the ultrasonic ranging sensor (17), the judgment condition is whether the thickness of the material layer on the screen surface detected by the ultrasonic ranging sensor (17) is between 3 times and 6 times the particle size of the material; when it is detected that the thickness of the material layer on the screen surface is less than 3 times the particle size of the material, the pitch control device (5) is controlled to reduce the pitch angle by the controller; when it is detected that the thickness of the material layer on the screen surface is greater than 6 times the particle size, the pitch control device (5) is controlled to increase the pitch angle by the controller, until the thickness of the material layer on the screen surface is adjusted to between 3 times and 6 times the particle size of the material.

Images