Material conditioning device, intelligent bulk material conveying system and system control method

Abstract

The present invention is a material regulating device, an intelligent bulk material conveying system and a control method of the system, which belongs to the field of material transmission and is proposed to solve the defect of deviation caused by the offset of the material falling point. The material regulating device includes: a casing, an inlet and an outlet are respectively provided at the upper and lower parts of the casing, a swing cylinder is provided inside the casing, which is sleeved on the outer periphery of the inlet, and a motor connected to the swing cylinder is installed on the outside of the casing, so that the swing cylinder produces horizontal left and right swings of different amplitudes in the casing. The system includes: a material regulating device, a conveying device, a detection device and a control device. The material regulating device is installed above the conveying device, and the detection device is installed below the conveying device. The detection device feeds back the detected signal to the control device, and the control device changes the material drop position on the conveying device according to the signal fed back by the detection device; the control method includes no-load operation, load operation, and comparative adjustment. The present invention can perform offset adjustment without stopping the machine.

Description

Technical field:

[0001] The present invention belongs to the technical field of material transmission, and in particular relates to a material regulating device, an intelligent bulk material conveying system and a control method of the system. Background technology:

[0002] In the process of long-distance transportation of bulk materials, the most commonly used conveying system is the belt conveyor. As an indispensable economical logistics conveying equipment for assembly lines, the belt conveyor is widely used because of its strong conveying capacity, long conveying distance, simple structure, easy maintenance, and convenient program control and automatic operation. However, in the existing bulk material conveying system, when the bulk material is being transported, due to factors such as different bulk material quantities, different drop heights during transportation, different turning angles, and different initial conveying speeds, the bulk material falls on the lower belt conveyor at different points. Usually, the material falls away from the center of the lower belt conveyor. The impact of the material will cause the belt conveyor to run without deviation when running without load, but when conveying materials, that is, when loaded, the belt conveyor will deviate. The impact of this material will cause the lower belt conveyor to deviate, causing the belt conveyor to start deviating, thereby causing all equipment in the entire conveying system to shut down. In response to this problem, the conventional treatment method is mainly to cancel or amplify the interlocking state of the deviation signal of the belt conveyor, or to monitor it manually on site. The adjustment method adopted is to artificially add baffles at the lower entrance to adjust the material flow according to the actual operating conditions. If the incoming material volume fluctuates, it cannot meet the basic requirements for the smooth operation of the belt conveyor. Summary of the invention:

[0003] In order to overcome the defect of the existing bulk material flow that the lower belt conveyor deviates due to the landing point offsetting the center of the belt conveyor when unloading, the present invention provides a material adjustment device, an intelligent bulk material conveying system and a control method of the system. By applying the adjustment device, the conveying system can dynamically control the falling position of the bulk material flow in real time, thereby avoiding the occurrence of deviation of the belt conveyor.

[0004] The technical solution adopted by the present invention is: a material regulating device, comprising: a casing, the casing is a drum-shaped hollow shell with small ends and a large middle, an inlet and an outlet connected to the interior of the casing are respectively provided on the upper and lower end faces of the casing, a swing cylinder is arranged inside the casing, the swing cylinder is a cylinder with openings at both ends, which is sleeved on the outer periphery of the inlet, and the swing cylinder is rotatably installed on the inner wall of the casing, a motor is installed on the outside of the casing, the output shaft of the motor is connected to the swing cylinder, so that the swing cylinder produces horizontal left and right swings of different amplitudes in the casing.

[0005] Preferably, a drop pipe is installed below the discharge port of the casing.

[0006] Preferably, the top opening of the pendulum cylinder is larger than the bottom opening thereof.

[0007] An intelligent bulk material conveying system includes: a material regulating device, a conveying device, a detection device and a control device. The material regulating device is installed above the conveying device and is used to adjust the drop position of bulk material discharged from the material regulating device on the conveying device. The detection device is installed below the conveying device, located in the material running direction and away from the material drop point, and is used to detect the position of the falling material on the conveying device. The detection device feeds back the detected signal to the control device, and the control device changes the drop position of the material discharged from the material regulating device on the conveying device according to the signal fed back by the detection device.

[0008] Preferably, the material regulating device comprises: a casing, which is a drum-shaped hollow shell with small ends and a large middle, and an inlet and an outlet connected to the interior of the casing are respectively provided on the upper and lower end faces of the casing, and a pendulum is arranged inside the casing, and the pendulum is a cylinder with openings at both ends, which is sleeved on the outer periphery of the inlet, and the pendulum is rotatably installed on the inner wall of the casing, and a motor is installed on the outside of the casing, and the output shaft of the motor is connected to the pendulum, so that the pendulum produces horizontal left and right swings of different amplitudes in the casing.

[0009] Preferably, the conveying device is a belt conveyor, which includes a ring-shaped transmission belt and a roller group for supporting the transmission belt. The roller group is a plurality of groups, which are arranged below the transmission belt at intervals along the conveying direction to support the transmission belt during transportation.

[0010] Preferably, the detection device includes multiple detection roller groups and sensors, the longitudinal section of each detection roller group is arc-shaped as a whole, the detection roller groups are installed side by side on the connecting frame, and sensors are respectively provided between the bottom of both sides of the detection roller group and the connecting frame, and the sensors are connected to the control device.

[0011] Preferably, each group of detection roller groups includes multiple rollers and roller frames, each roller is rotatably mounted on a roller frame, multiple rollers 311 are arranged in parallel on a connecting frame 33, and the installation axis of the rollers 311 on both sides is higher than the installation axis of the middle roller 312, each roller frame 31 on both sides is fixed to the connecting frame 33 through a sensor 32, and each roller frame 312 in the middle is directly fixed to the connecting frame 33.

[0012] The control method of the intelligent bulk material conveying system specifically comprises the following steps:

[0013] Step 1: First, the conveying device is operated without load, and the output voltage during the no-load operation is detected by the detection device. The left-right ratio of the belt conveyor is determined by the output voltage as the deviation point of the no-load operation center;

[0014] Step 2: Load operation is then performed, and the detection device detects in real time the location of the drop point of the material discharged from the material adjustment device on the belt conveyor;

[0015] Step 3: Compare the material drop point position with the deviation of the center of the belt conveyor when it is running without load. According to the deviation value, start the motor in the material adjustment device and drive the swing drum to swing. By adjusting the swing direction and angle of the swing drum, the material discharged from the swing drum after adjustment on the belt conveyor drops to a position close to the deviation of the running center of the belt conveyor when it is running without load, thus completing the deviation adjustment function.

[0016] Step 4. Repeat step 3 again.

[0017] Preferably, in step 3, after comparison, when the deviation point of the no-load operation center is less than or equal to 1.05 and greater than or equal to 0.95, it is a normal state; when the deviation point of the no-load operation center is greater than 1.05 or less than 0.95, it indicates that there is a deviation between the material drop point and the center of the belt conveyor, and the swing drum needs to be adjusted.

[0018] The beneficial effects of the present invention are:

[0019] 1. The material regulating device designed in the present invention drives the swing cylinder to swing by a motor, so that different material dropping positions can be achieved when the material is discharged from the material regulating device.

[0020] 2. The bulk material conveying system designed by the present invention analyzes and calculates the deviation between the drop point and the center of the belt conveyor, and transmits the deviation information to the control device. The control device issues a rotation angle instruction to the motor in the material adjustment device, determines the angle at which the swing device needs to swing, and can adjust the angle of the swing cylinder in the material adjustment device without stopping the conveyor line. At the same time, the deviation between the drop point of the material and the center of the belt conveyor is compared and fed back until the deviation is within the specified range, thereby achieving the purpose of timely correcting the deviation of the material drop point that causes the belt conveyor to deviate.

[0021] 3. The present invention has a wide range of applications and can realize deviation adjustment for different materials, different transfer heights, different material speeds, and different material impact angles. The deviation of the material will not be affected by the no-load deviation, nor will it be affected by the impact of the material. Description of the drawings:

[0022] Figure 1 It is a structural schematic diagram of the material regulating device in the present invention;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 for Figure 1 Side view of

[0025] Figure 4 The diagrams are of three states of the pendulum barrel in the casing;

[0026] Figure 5 It is a three-dimensional schematic diagram of the intelligent bulk material conveying system;

[0027] Figure 6 for Figure 5 The main view;

[0028] Figure 7 It is a structural schematic diagram of the roller group;

[0029] Figure 8 It is a three-dimensional schematic diagram of the detection device in the present invention;

[0030] Fig. 9 for Figure 8 The main view;

[0031] Fig.10 for Figure 8 A top view of

[0032] Fig.11 It is a schematic diagram of the structure in which the detection device is installed on the conveying device;

[0033] Fig.12 It is the working flow chart of the control device;

[0034] Fig.13 It is a structural schematic diagram of a material regulating device for feeding bulk materials from a central position, wherein a is a front view and b is a top view;

[0035] Fig.14 It is a structural schematic diagram of the material regulating device for feeding bulk materials from the right side, wherein a is a front view and b is a top view;

[0036] Fig.15 For the swing tube Fig.14 Schematic diagram of adjustment under the condition, where a is the main view and b is the top view;

[0037] Fig.16 It is a structural schematic diagram of the material regulating device for feeding bulk materials from the left side, wherein a is a front view and b is a top view;

[0038] Fig.17 For the swing tube Fig.16 Schematic diagram of adjustment under the condition, where a is the main view and b is the top view;

[0039] Fig.18 It is the control flow chart of the system;

[0040] Among them: 1 material regulating device, 11 machine housing, 111 feeding port, 112 discharging port, 12 swing cylinder, 13 motor, 14 dropping pipe, 15 material guide trough, 2 conveying device, 21 transmission belt, 22 roller group, 3 detection device, 31 detection roller group, 311 roller, 312 roller frame, 32 sensor, 33 connecting frame, 4 control device. Specific implementation method:

[0041] Example 1

[0042] like Figures 1 to 4 As shown, the present invention is a material regulating device, comprising: a casing 11, an inlet 111 and an outlet 112 communicating with the inside of the casing 11 are respectively provided on the upper and lower end surfaces of the casing 11, and a swing cylinder 12 is arranged inside the casing 11, the swing cylinder 12 is a cylinder with openings at both ends, and the top opening is larger than the bottom opening, and the swing cylinder 12 is sleeved on the outer periphery of the inlet 11, and the swing cylinder 12 is rotatably mounted on the inner wall of the casing 11. In order to facilitate the swing of the swing cylinder 12, the casing 11 is preferably a drum-shaped hollow shell with small ends and a large middle. A motor 13 is arranged outside the casing 11, and the motor 13 is a reduction servo motor. The motor 13 is installed on the outside of the casing 11 through a support, and the end shaft of the swing cylinder 12 is sleeved in the hollow shaft of the reduction servo motor, and the motor 13 is used to drive the swing cylinder 12 to produce horizontal left and right swing positions of different amplitudes in the casing 11.

[0043] In order to guide the falling material flow, a drop pipe 14 can be installed below the discharge port 112 of the housing 11 as required.

[0044] Example 2

[0045] Example 2 is an intelligent bulk material conveying system using the material conditioning device in Example 1.

[0046] like Figure 5 and Figure 6 As shown, the intelligent bulk material conveying system includes: a material regulating device 1, a conveying device 2, a detection device 3 and a control device 4. The material regulating device 1 is installed above the conveying device 2, and the detection device 3 is installed below the conveying device 2, located in the material running direction and away from the material dropping point. The detection device 3 feeds back the detected signal to the control device 4.

[0047] The material regulating device 1 is used to adjust the drop position of the bulk material falling from the material regulating device 1 on the conveying device 2, and comprises: a housing 11, an inlet 111 and an outlet 112 connected to the inside of the housing 11 are respectively provided on the upper and lower end surfaces of the housing 11, and a swing cylinder 12 is arranged inside the housing 11, the swing cylinder 12 is a cylinder with openings at both ends, and the top opening is larger than the bottom opening, and it is sleeved on the outer periphery of the inlet 11, and the swing cylinder 12 is rotatably mounted on the inner wall of the housing 11. In order to facilitate the swing of the swing cylinder 12, the housing 11 is preferably a drum-shaped hollow shell with small ends and a large middle. A motor 13 is arranged outside the housing 11, and the motor 13 is a reduction servo motor. The motor 13 is installed on the outside of the housing 11 through a support, and the output shaft of the motor 13 is connected to the swing cylinder 12, which is used to drive the swing cylinder 12 to produce horizontal left and right swings of different amplitudes in the housing 11. In order to guide the falling material flow, a material drop pipe 14 and a material guide trough 15 can be installed below the material outlet 112 of the housing 11 as required.

[0048] The conveying device 2 is used to convey the bulk material falling from the material conditioning device 1, and is preferably a belt conveyor. The belt conveyor is an existing device, which includes a ring-shaped transmission belt 21 and a roller group 22 for supporting the transmission belt 21. The transmission belt 21 is used to convey materials, such as Figure 7 As shown, the roller set 22 is an existing standard equipment, which consists of multiple sets and is arranged below the transmission belt 21 at intervals along the conveying direction to support the transmission belt 21.

[0049] like Figures 8 to 11 As shown, the detection device 3 is used to detect the position of the falling material on the conveyor 2. It is installed on the belt frame through the connecting frame 33. The detection device 3 includes a detection roller group 31 and a sensor 32. The longitudinal section of the detection roller group 31 is an arc as a whole. It is installed side by side on the upper surface of the connecting frame 33. The connecting frame 33 is a plate-like material in a convex shape, and the detection roller group 31 is installed on the convex part of the connecting frame 33. Sensors 32 are respectively provided on both sides of the bottom of the detection roller group 31 and between the connecting frame 33. The sensor 32 is a strain sensor, which transmits the collected signal to the control device 4 through the I2C bus communication method.

[0050] Each group of detection roller groups 31 includes multiple rollers 311 and roller frames 312. Each roller 311 is rotatably mounted on a roller frame 312. Multiple rollers 311 are arranged in parallel on the connecting frame 33. The installation axis of the rollers 311 on both sides is higher than the installation axis of the middle roller 312. A support shaft is fixed at the bottom center position of each roller frame 312 on both sides. The roller frame 312 is inserted into the load-bearing inner hole of the corresponding sensor 32 through the support shaft. The sensor 32 is fixed to the connecting frame 33 by bolts, and each roller frame 312 in the middle is directly fixed to the connecting frame 33.

[0051] This embodiment is introduced by taking four groups of detection roller groups 31 arranged side by side, each group of detection roller groups 31 including five rollers 311 arranged side by side as an example. The sensor 32 is installed under the roller frame 312 located on both sides of the rollers 311 in each group of detection roller groups 31, that is, no sensor 32 is installed under the roller frame 312 located in the middle. The layout is arranged symmetrically on both sides of the belt conveyor center, that is, a total of 16 points are arranged, 8 points are arranged on the left and right, and four points are arranged at the same position horizontally to form a fusion structure network, so that the sensor 32 at any position can be globally estimated, avoiding the failure of a certain sensor 32 to affect the operation of the system, improving the reliability of the system and avoiding the impact of falling materials causing the operation deviation of the transmission belt 21. For ease of description, the present embodiment numbers each sensor 32, i.e., the sensors 32 in the first row of the detection roller group 31 are distributed from left to right as r11, r21, r31 and r41, the sensors 32 in the second row of the detection roller group 31 are distributed from left to right as r12, r22, r32 and r42, the sensors 32 in the third row of the detection roller group 31 are distributed from left to right as r13, r23, r33 and r43, and the sensors 32 in the fourth row of the detection roller group 31 are distributed from left to right as r14, r24, r34 and r44. When the material passes through the sensors 32 arranged in a matrix, by setting a plurality of sensors 32, the deviation between the drop point and the no-load running center of the belt conveyor can be detected in real time.

[0052] like Fig.12 As shown, the control device 4 changes the drop position of the material discharged from the material regulating device 1 on the conveying device 2 according to the signal fed back by the detection device 3 .

[0053] Example 3

[0054] Embodiment 3 is the control method of embodiment 2.

[0055] The control method of the intelligent bulk material conveying system specifically comprises the following steps:

[0056] Step 1: First, the conveying device 2 is operated without load, and the detection device 3 detects the output voltage during the no-load operation. The left-right ratio of the belt conveyor is determined by the output voltage as the deviation point of the no-load operation center.

[0057] The sixteen sensors 32 in the detection device 3 are arranged according to Figure 7 The position is set, the sensor 32 is a strain sensor, and the conveying device 2 is a belt conveyor, wherein:

[0058] R1=(R11+R12+R13+R14) / 4

[0059] R2=(R21+R22+R23+R24) / 4

[0060] R3=(R31+R32+R33+R34) / 4

[0061] R4=(R41+R42+R43+R44) / 4

[0062] When unloaded,

[0063] Where R is the strain gauge resistance, is the resistance change of the strain gauge at point i when the belt conveyor is running without load

[0064] According to the principle of full bridge circuit:

[0065] Where U0 is the bridge output voltage;

[0066] Determine the left-right ratio of the belt conveyor as the deviation point of the center of no-load operation

[0067]

[0068] Where U LK It is the output voltage of the left side of the detection device, i.e., r11-r12-r13-r14, r21-r22-r23-r24, when it is unloaded; U RK The output voltage when no load is at the right side of the detection device, i.e., R31-R32-R33-R34 and R41-R42-R43-R44

[0069] Step 2: Load operation is then performed, and the detection device 3 detects in real time the location of the material dropping point on the belt conveyor of the material discharged from the material adjustment device 1.

[0070] Under load,

[0071] In the formula, is the resistance change of the strain gauge at point i when the belt conveyor is under load

[0072] Step 3: Compare the location of the drop point with the center deviation of the belt conveyor when it is running without load

[0073] Analyze and calculate the deviation between the material drop point and the belt conveyor center, and use the deviation point of the loaded running center to remove the deviation of the unloaded running center.

[0074]

[0075] The deviation is proportional to the voltage signal of the motor 13, that is, C∝Us

[0076] Wherein, Us is the voltage signal of the motor 13

[0077] like Fig.13 As shown, when C≤1.05 and C≥0.95, it indicates that there is no deviation between the material drop point and the center of the belt conveyor. At this time, the longitudinal center line of the swing drum 12 is perpendicular to the ground, and the motor 13 is in a stopped state.

[0078] like Fig.14 As shown, when C<0.95, it means that there is a deviation between the material landing point and the center of the belt conveyor, that is, the material landing point is biased to the right relative to the center of the belt conveyor.

[0079] When adjusting, if Fig.15 As shown, the motor 13 needs to be started counterclockwise and drive the swing cylinder 12 to swing to the left, so that the material discharged from the swing cylinder 12 after adjustment falls on the belt conveyor, and the deviation from the running center of the belt conveyor when it is unloaded is close to 1.

[0080] like Fig.16 As shown, when C>1.05, it means that there is a deviation between the material landing point and the center of the belt conveyor, that is, the material landing point is biased to the left relative to the center of the belt conveyor.

[0081] When adjusting, if Fig.17 As shown, the motor 13 needs to be started clockwise and drive the swing cylinder 12 to swing to the right, so that the material discharged from the swing cylinder 12 after adjustment falls on the belt conveyor, and the deviation from the running center of the belt conveyor when it is unloaded is close to 1.

[0082] like Fig.18 As shown, by adjusting the voltage signal of the motor 13 in the material regulating device 1, the reduction servo motor is driven to drive the swing cylinder 12 to swing, and by adjusting the swing angle of the swing cylinder 12, the deviation of the drop point position of the material discharged from the swing cylinder 12 on the belt conveyor after adjustment and the running center of the belt conveyor when the belt conveyor is unloaded is between 0.95 and 1.05, and the adjustment is completed.

[0083] Step 4. Repeat step 3 again.

[0084] The above are only preferred specific embodiments of the present invention, which are all different implementations based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control method for an intelligent bulk material conveying system, comprising an intelligent bulk material conveying system, the system comprising a material regulating device (1), a conveying device (2), a detection device (3) and a control device (4), wherein the material regulating device (1) is installed above the conveying device (2) and is used to regulate the drop position of bulk material discharged from the material regulating device (1) on the conveying device (2), the detection device (3) is installed below the conveying device (2) and is located in the material running direction and away from the material drop point, and is used to detect the position of the dropped material on the conveying device (2), the detection device (3) feeds back the detected signal to the control device (4), and the control device (4) changes the drop position of the material discharged from the material regulating device (1) on the conveying device (2) according to the signal fed back by the detection device (3); The material regulating device (1) comprises: a casing (11), the casing (11) being a drum-shaped hollow shell with small ends and a large middle, an inlet (111) and an outlet (112) communicating with the interior of the casing (11) respectively being provided on the upper and lower end surfaces of the casing (11), a swing cylinder (12) being provided inside the casing (11), the swing cylinder (12) being a cylinder with openings at both ends, being sleeved on the outer periphery of the inlet (111), and being rotatably mounted on the inner wall of the casing (11), a motor (13) being mounted outside the casing (11), the output shaft of the motor (13) being connected to the swing cylinder (12), so that the swing cylinder (12) generates horizontal left-right swings of different amplitudes inside the casing (11); The conveying device (2) is a belt conveyor, which comprises a transmission belt (21) arranged in an annular shape and a roller group (22) for supporting the transmission belt (21), wherein the roller group (22) comprises a plurality of groups, which are arranged below the transmission belt (21) at intervals along the conveying direction and are used to support the transmission belt (21) during conveying; The detection device (3) comprises a plurality of detection roller groups (31) and sensors (32); the longitudinal section of each detection roller group (31) is generally arc-shaped; the detection roller groups (31) are mounted side by side on a connecting frame (33); and sensors (32) are respectively provided between the bottom of both sides of the detection roller groups (31) and the connecting frame (33); the sensors (32) are connected to the control device (4); Each detection roller group (31) comprises a plurality of rollers (311) and roller frames (312), each roller (311) is rotatably mounted on a roller frame (312), the plurality of rollers (311) are arranged in parallel on a connecting frame (33), and the mounting axes of the rollers (311) on both sides are higher than the mounting axis of the middle roller (312), each roller frame (31) on both sides is fixed to the connecting frame (33) via a sensor (32), and each roller frame (312) in the middle is directly fixed to the connecting frame (33); Four groups of detection roller groups (31) are arranged side by side, each group of detection roller groups (31) includes five rollers (311) arranged side by side, and the sensor (32) is installed below the roller frames (312) located on both sides of the rollers (311) in each group of detection roller groups (31), and no sensor (32) is arranged below the roller frame (312) located in the middle. The arrangement is arranged symmetrically on both sides of the belt conveyor center, that is, a total of 16 points are arranged, 8 points are arranged on the left and right, and four points are arranged at the same position in the horizontal direction to form a fusion structure network. The first The sensors (32) in the first row of detection roller groups (31) are distributed from left to right as r11, r21, r31 and r41, the sensors (32) in the second row of detection roller groups (31) are distributed from left to right as r12, r22, r32 and r42, the sensors (32) in the third row of detection roller groups (31) are distributed from left to right as r13, r23, r33 and r43, and the sensors (32) in the fourth row of detection roller groups (31) are distributed from left to right as r14, r24, r34 and r44; It is characterized in that it specifically includes the following steps: Step 1: First, the conveying device (2) is operated without load, and the output voltage during the no-load operation is detected by the detection device (3). The left-right ratio of the belt conveyor is determined by the output voltage as the deviation of the no-load operation center; the detection device (3) includes sixteen sensors (32), the sensors (32) are strain sensors, and the conveying device (2) is a belt conveyor, wherein: R1=(r11+r12+r13+r14) / 4 R2=(r21+r22+r23+r24) / 4 R3=(r31+r32+r33+r34) / 4 R4=(r41+r42+r43+r44) / 4 When unloaded, ; Where R is the strain gauge resistance, is the resistance change of the strain gauge at point i when the belt conveyor is running without load, The corresponding weight of the belt conveyor and residual materials at position i when empty; According to the principle of full bridge circuit: ; Where U0 is the bridge output voltage, is the change value of a single strain gauge resistance, and R is the average resistance of all strain gauges; Determine the left-right ratio of the belt conveyor as the deviation from the center of no-load operation: ； Where U LK It is the output voltage of the left side of the detection device, i.e., r11-r12-r13-r14, r21-r22-r23-r24, when it is unloaded; U RK It is the output voltage when no-load at the right side of the detection device, i.e., R31-R32-R33-R34 and R41-R42-R43-R44; Step 2: Then, load operation is performed, and the detection device (3) detects in real time the position of the drop point of the material discharged from the material regulating device (1) on the belt conveyor; Under load, ; In the formula, is the resistance change of the strain gauge at point i when the belt conveyor is running under load; The corresponding weight of the belt conveyor and residual materials at position i when loaded; Step 3, compare the position of the drop point with the deviation of the center of the belt conveyor when it is running without load; The deviation between the material drop point and the center of the belt conveyor is calculated by dividing the deviation of the loaded running center by the deviation of the unloaded running center: ； in, The output voltage under load is at the left side of the detection device, i.e., R11-R12-R13-R14, R21-R22-R23-R24. The output voltage under load at the right side of the detection device, i.e., R31-R32-R33-R34 and R41-R42-R43-R44, is proportional to the voltage signal of the motor (13), i.e., ; Where Us is the voltage signal of the motor (13); According to the deviation value, the motor (13) in the material adjustment device (1) is started to drive the swing cylinder (12) to swing, and by adjusting the swing direction and angle of the swing cylinder (12), the material discharged from the swing cylinder (12) after adjustment is placed on the belt conveyor at a point close to the deviation of the running center of the belt conveyor when the belt conveyor is unloaded, thereby completing the deviation adjustment function; Step 4. Repeat step 3 again.

2. The control method according to claim 1, characterized in that: In step 3, after comparison, when the ratio of the deviation of the loaded running center to the deviation of the no-load running center is less than or equal to 1.05 and greater than or equal to 0.95, it is a normal state; when the ratio of the deviation of the loaded running center to the deviation of the no-load running center is greater than 1.05 or less than 0.95, it indicates that there is a deviation between the material drop point and the center of the belt conveyor, and the swing cylinder (12) needs to be adjusted.

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