Conveying belt body deviation rectifying device, conveying belt body deviation rectifying method and conveying belt

Abstract

The invention discloses a conveying belt body deviation rectifying device which comprises a base, a first visual sensor, a telescopic mechanism, a deviation rectifying shaft and a deviation rectifying shaft driving motor, the telescopic mechanism is arranged on the base, and the deviation rectifying shaft driving motor drives the deviation rectifying shaft to rotate. The deviation rectifying shaft is located below the conveying belt body, the axis of the deviation rectifying shaft is perpendicular to the conveying direction of the conveying belt body, and the first visual sensor is arranged in front of the deviation rectifying shaft and used for detecting the deviation angle of the conveying belt body before the conveying belt body passes through the deviation rectifying shaft. The telescopic mechanism drives the end, in the same deviation direction as the conveying belt body, of the deviation rectifying shaft to be lifted. The invention further discloses a deviation rectifying method for the conveying belt body, namely, when the conveying belt body deviates, the lifting height needed by the deviation rectifying shaft is calculated, and then the deviation rectifying shaft is lifted. The invention further discloses a conveying belt with the conveying belt body deviation rectifying device. The device is simple in structure, convenient to modify and add on old equipment, and convenient to debug and maintain.

Description

Technical Field

[0001] The invention relates to a conveyor belt deviation correction device and a deviation correction method, belonging to the technical field of conveyor belt correction. Background Art

[0002] During operation, the conveyor belt or the material on the belt may deviate due to various reasons. Generally, a roller-type deviation correction device or a baffle-type deviation correction device is used to adjust the conveyor belt, but the deviation correction effect is often not ideal.

[0003] Some other guiding devices are often complicated to install, and the response speed and accuracy of the guiding system cannot fully meet the requirements during high-speed transportation, resulting in unsatisfactory guiding effects. At the same time, due to the complex structure, improper maintenance can easily lead to more failures and downtime, and maintenance and debugging also require professional technicians, further increasing operating costs. When upgrading and installing a new system on old equipment, a lot of adjustments and modifications may be required. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the task of the present invention is to provide a conveyor belt deviation correction device that is easy to modify and use on old equipment. Another task of the present invention is to provide a conveyor belt deviation correction method to improve the deviation correction response speed of the correction system. The present invention also provides a conveyor belt with a conveyor belt deviation correction device.

[0005] The technical solution of the present invention is as follows: A conveyor belt correction device comprises a base, a first visual sensor, a telescopic mechanism, a correction shaft and a correction shaft driving motor, the base is provided with the telescopic mechanism, the correction shaft driving motor drives the correction shaft to rotate, the correction shaft is located under the conveyor belt body and the axis of the correction shaft is perpendicular to the conveying direction of the conveyor belt body, the first visual sensor is arranged in front of the correction shaft to detect the deviation angle of the conveyor belt body before the correction shaft, and the telescopic mechanism drives the correction shaft to lift the end in the same deviation direction as the conveyor belt body.

[0006] Furthermore, the lifting direction of the deviation-correcting shaft is perpendicular to the surface of the conveyor belt body.

[0007] Furthermore, it comprises a second visual sensor, which is arranged behind the deviation-correcting shaft and is used to detect the deviation angle of the conveyor belt body after passing through the deviation-correcting shaft.

[0008] Furthermore, a pushing block is hinged at the top end of the telescopic mechanism, and the pushing block supports the end of the deviation-correcting shaft.

[0009] Another technical solution of the present invention is as follows:

[0010] A conveyor belt deviation correction method is based on the above-mentioned conveyor belt deviation correction device, comprising detecting the angle between the edge direction of the conveyor belt and the preset conveying direction of the conveyor belt by the first visual sensor, and calculating the theoretical lifting height H' when the angle is not zero, and H' is determined by the following formula

[0011]

[0012] Wherein, L: horizontal distance between the deflection correction axis and the previous support axis of the conveyor belt body; θ: deviation angle of the conveyor belt body; H: vertical distance from the deflection correction axis to the first plane where the previous support axis of the conveyor belt body is located before deflection correction, and the first plane is perpendicular to the lifting direction of the deflection correction axis; t1: time for the conveyor belt body to move from the previous support axis to the deflection correction axis before deflection correction; V2: edge linear velocity of the conveyor belt body on the deflection correction axis; V1: edge linear velocity of the conveyor belt body on the previous support axis; R: length of the deflection correction axis; ɑ: lifting angle of the deflection correction axis; t2: time for the conveyor belt body to move from the previous support axis to the deflection correction axis after deflection correction;

[0013] The telescopic mechanism drives the end of the deviation-correcting shaft in the same deviation direction as the conveyor belt body to be lifted up by a height H'.

[0014] Further, when the lifting direction of the deviation-correcting shaft is perpendicular to the surface of the conveyor belt body, H=0.

[0015] Furthermore, when the telescopic mechanism drives one end of the deviation-correcting shaft to lift, it first lifts 60% to 70% of the height H' at a predetermined speed, and then lifts at 20% to 30% of the predetermined speed.

[0016] Furthermore, a second visual sensor arranged behind the deflection correcting shaft detects the deviation angle of the conveyor belt after passing the deflection correcting shaft. When one end of the deflection correcting shaft is raised to the height H', when the second visual sensor detects that the conveyor belt has a deviation angle, the telescopic mechanism drives the deflection correcting shaft to continue to be raised at 20% to 30% of the predetermined speed until the second visual sensor detects that the deviation angle of the conveyor belt is zero.

[0017] Another technical solution of the present invention is a conveyor belt, comprising the aforementioned conveyor belt body deviation correcting device.

[0018] The advantages of the present invention compared with the prior art are:

[0019] The present invention uses a telescopic mechanism to drive one end of the correction shaft to lift up to correct the conveyor belt body. It only needs to add a conveyor belt correction device, and there is no need to modify the motion mechanism of the original mechanism. It can simplify the mechanical structure of the entire conveyor belt or material transportation system and reduce space costs. It is universal for different conveyor belts or material transmission systems after adjustment, and the correction mode has a simple structure and a fast response speed, which meets the needs of high-speed correction and is more convenient in debugging, maintenance and parameter changes.

[0020] The present invention determines the lifting height from two perspectives: speed difference and elongation. When applied to different conveyor belts or material transportation systems, it only needs to adjust the constant size according to the physical parameters of different conveyor belts or material transportation systems. That is, it has good versatility and can reduce the time cost of transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a conveyor belt with a conveyor belt body deviation correction device according to an embodiment.

[0022] Figure 2 This is the geometric model diagram of the conveyor after deviation and before correction.

[0023] Figure 3 This is the geometric model diagram of the conveyor after deviation correction. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the embodiments, but are not intended to limit the present invention.

[0025] Please combine Figure 1As shown, the conveyor belt involved in this embodiment includes a driving shaft 1, a driven shaft 2 and a conveyor belt body 3, and the conveyor belt body 3 is wound on the driving shaft 1 and the driven shaft 2. The conveyor belt body correction device is located between the driving shaft 1 and the driven shaft 2, and the conveyor belt body correction device includes a base 4, a first visual sensor, a second visual sensor, a telescopic mechanism 5, a correction shaft 6 and a correction shaft drive motor 7. The base 4 is provided with a telescopic mechanism 5, which is an electric hydraulic pusher, and the bottom is embedded at both ends of the base 4, on both sides of the conveyor belt body 3. The top of the telescopic mechanism 5 is hinged with a push block 8, and the push block 8 is used to support the end of the correction shaft 6, that is, the two ends of the correction shaft 6 are supported on the push block. It should be understood that the correction shaft 6 is provided with a correction shaft drive motor 7 that drives it to rotate, and the push block 8 on one side can be used to carry the correction shaft drive motor 7. When the telescopic mechanism 5 is extended and retracted, the corresponding end of the correction shaft 6 can be controlled to be raised and reset. The deflection correction shaft 6 is located under the conveyor belt body 3 and the axis of the deflection correction shaft 6 is perpendicular to the conveying direction of the conveyor belt body 3. The first visual sensor and the second visual sensor are respectively installed on the bracket 9 located before and after the deflection correction shaft 6. The first visual sensor and the second visual sensor are not specifically illustrated in the legend. The first visual sensor and the second visual sensor are used to capture the edge image of the conveyor belt body 3 to determine the deviation of the conveyor belt body. Therefore, generally speaking, the first visual sensor and the second visual sensor are set in a direction perpendicular to the surface of the conveyor belt body 3, and the central axis of the captured image is parallel to the conveying direction of the conveyor belt body 3, so that it is easy to identify the specific deviation angle.

[0026] The process of determining the height to which the telescopic mechanism 5 in the above-mentioned conveyor belt drives the correcting shaft 6 to be lifted is as follows: taking the sum of the tension before correction and the change in tension after correction as equal to the tension after correction as the calculation principle, an equation of equal tension is obtained, and then the relationship between the offset angle of the conveyor belt body 3 and the lifting height of the correcting shaft 6 is obtained, and then the required lifting height of the correcting shaft 6 is calculated from the obtained offset angle of the conveyor belt body 3.

[0027] According to Hooke's law, the tension of the conveyor belt caused by the speed difference of the two transmission shafts is calculated as follows:

[0028]

[0029] The general tension calculation formula 2 is

[0030]

[0031] F T : tension; S: conveyor belt cross-sectional area; E: conveyor belt elastic modulus; t: time for the conveyor belt to move from the previous transmission shaft to the deviation correction shaft; V: transmission shaft speed; ΔL: elongation of the conveyor belt; L: original length of the conveyor belt.

[0032] The purpose of the present invention is to obtain the relationship between the conveyor belt body deviation angle and the lifting height of the deviation correction shaft, so its principle formula is:

[0033] F T0 +·△F T =F T1

[0034] Where: F T0 : The tension of the conveyor belt on the lifted side after deviation and before correction; ΔF T : Change in the tension of the conveyor belt on the lifted side after deviation correction; F T1 : The tension of the conveyor belt on the lifted side after deviation correction.

[0035] Among them, F T0 according to Figure 2 , calculated by the above tension calculation formula 1; ΔF T Calculated by tension calculation formula 2, Figure 2 Towards Figure 3 During the geometric model transformation, the change in the tension of the conveyor belt on the lifted side after deviation correction; F T1 according to Figure 3 , calculated by tension calculation formula 1. Based on Figure 2 and Figure 3 Substituting the geometric model shown into the principle formula, we can get

[0036]

[0037] Further basis Figure 2 and Figure 3 The geometric model can determine the calculation method of each parameter in the formula. The edge length L1 of the conveyor belt between the two axes after deviation and before correction is:

[0038]

[0039] The movement of the conveyor belt between two transmission shafts of different speeds can be regarded as uniform linear motion or uniformly accelerated linear motion. The time t1 of the conveyor belt from the previous transmission shaft to the correction shaft before correction is:

[0040]

[0041] The edge length L' of the conveyor belt between the two axes after deviation correction:

[0042]

[0043] The cosine of the angle γ is:

[0044]

[0045] Correction axis lifting angle α:

[0046]

[0047] The movement of the conveyor belt between two transmission shafts of different speeds can be regarded as uniform linear motion or uniformly accelerated linear motion. The time t2 for the conveyor belt to move from the previous transmission shaft to the correction shaft before the correction shaft is reset after correction is:

[0048]

[0049] The actual meaning of V2cosγ is the transmission speed of the conveyor belt or material along the L' direction at the correction axis.

[0050] Furthermore, since the lifting angle is relatively small and there is resistance between the conveyor belt body and the shaft, the horizontal deviation of the conveyor belt body on the transmission shaft behind the deviation correction shaft during lifting and correction can be ignored.

[0051] Substituting the above quantities into the above principle formula, we can get the calculation formula:

[0052]

[0053] L: horizontal distance between the deflection correction axis and the previous support axis of the conveyor belt body; θ: deviation angle of the conveyor belt body; H: vertical distance from the deflection correction axis to the first plane where the previous support axis of the conveyor belt body is located before deflection correction, the first plane is perpendicular to the lifting direction of the deflection correction axis, when the lifting direction of the deflection correction axis is perpendicular to the surface of the conveyor belt body, H=0; V2: edge linear velocity of the conveyor belt body on the deflection correction axis; V1: edge linear velocity of the conveyor belt body on the previous support axis; R: length of the deflection correction axis.

[0054] The correction process is that the first visual sensor detects the angle between the edge direction of the conveyor belt and the preset conveying direction of the conveyor belt, and calculates the theoretical lifting height H' when the angle is not zero. When the telescopic mechanism drives one end of the correction shaft to lift, it first lifts 60% to 70% of the height H' at a predetermined speed, and then lifts at 20% to 30% of the predetermined speed. After the lifting speed begins to decrease, the second visual sensor begins to detect the correction until the conveyor belt no longer has an offset angle after correction, indicating that the correction is completed; if the conveyor belt still has an offset angle after reaching the theoretical required lifting height, the lowered lifting speed is maintained and the lifting continues until the correction is completed. After the correction is completed, the telescopic mechanism retracts to the initial position and the subsequent operation of the conveyor belt is resumed.

[0055] In addition to installing a conveyor belt body correction device on the conveyor belt for correction, the conveyor belt body correction device can also be installed on other belt material winding and conveying devices, such as non-woven fabric slitting machines. In a specific embodiment, the horizontal distance between the correction shaft and the previous transmission shaft is L = 2m, the vertical distance between the correction shaft and the previous transmission shaft before correction is H = 1m, the correction shaft length is R = 1m, the correction shaft edge linear velocity V2 = 8.08m / s, and the correction shaft edge linear velocity V1 = 8m / s. The selected electric hydraulic pusher model is YT1-90Z / 8, the offset nylon non-woven material elastic modulus E = 3000MPa, and its cross-sectional area S = 0.0001m 2 . The detected deviation angle θ=5°, from this point on: calculated by using this method, the theoretical lifting height H'=0.0569m required to complete the deviation correction; after time t1=0.276, when the deviated material begins to reach the deviation correction shaft, the electric hydraulic pusher pushes the push block at the rated pushing speed to make the deviation correction shaft reach 60% of the required height for deviation correction, that is, 0.0336m, and then the electric hydraulic pusher decelerates and pushes the push block at 20% of the rated pushing speed. The second visual sensor no longer detects the deviation of the material, and the deviation correction is completed. The tension of the material on the lifting side is adjusted from 2980N / m before the deviation correction to 2985N / m. After the deviation correction is completed, the electric hydraulic pusher drives it back to its original position at the rated return speed to resume the subsequent material transportation. After the non-woven fabric slitting machine adopts the lifting deviation correction shaft tension adjustment system of the present invention, the deviation of materials during the production process is effectively eliminated.

Claims

1. A conveyor belt deviation correction device, characterized in that: It includes a base, a first visual sensor, a telescopic mechanism, a correcting shaft and a correcting shaft driving motor. The telescopic mechanism is provided on the base. The correcting shaft driving motor drives the correcting shaft to rotate. The correcting shaft is located under the conveyor belt body and the axis of the correcting shaft is perpendicular to the conveying direction of the conveyor belt body. The first visual sensor is arranged in front of the correcting shaft to detect the deviation angle of the conveyor belt body before the correcting shaft. The telescopic mechanism drives the correcting shaft to lift the end in the same deviation direction as the conveyor belt body.

2. The conveyor belt deviation correction device according to claim 1, characterized in that: The lifting direction of the deviation-correcting shaft is perpendicular to the surface of the conveyor belt body.

3. The conveyor belt deviation correction device according to claim 1, characterized in that: A second visual sensor is included, and the second visual sensor is arranged behind the deviation correction shaft and is used to detect the deviation angle of the conveyor belt body after passing through the deviation correction shaft.

4. The conveyor belt deviation correction device according to claim 1, characterized in that: A pushing block is hinged at the top end of the telescopic mechanism, and the pushing block supports the end of the deviation-correcting shaft.

5. A conveyor belt deviation correction method, characterized in that: The conveyor belt deviation correction device according to any one of claims 1 is implemented, comprising detecting the angle between the edge direction of the conveyor belt and the preset conveying direction of the conveyor belt by the first visual sensor, and calculating the theoretical lifting height H' when the angle is not zero, and H' is determined by the following formula Wherein, L: horizontal distance between the deflection correction axis and the previous support axis of the conveyor belt body; θ: deviation angle of the conveyor belt body; H: vertical distance from the deflection correction axis to the first plane where the previous support axis of the conveyor belt body is located before deflection correction, and the first plane is perpendicular to the lifting direction of the deflection correction axis; t1: time for the conveyor belt body to move from the previous support axis to the deflection correction axis before deflection correction; V2: edge linear velocity of the conveyor belt body on the deflection correction axis; V1: edge linear velocity of the conveyor belt body on the previous support axis; R: length of the deflection correction axis; ɑ: lifting angle of the deflection correction axis; t2: time for the conveyor belt body to move from the previous support axis to the deflection correction axis after deflection correction; The telescopic mechanism drives the end of the deviation-correcting shaft in the same deviation direction as the conveyor belt body to be lifted up by a height H'.

6. A conveyor belt deviation correction method, characterized in that: The conveyor belt deviation correction device according to any one of claim 2 is implemented, comprising detecting the angle between the edge direction of the conveyor belt and the preset conveying direction of the conveyor belt by the first visual sensor, and calculating the theoretical lifting height H' when the angle is not zero, and H' is determined by the following formula Wherein, L: horizontal distance between the deviation correction axis and the previous support axis of the conveyor belt; θ: deviation angle of the conveyor belt; H=0; t1: time for the conveyor belt to move from the previous support axis to the deviation correction axis before deviation correction; V2: edge linear velocity of the conveyor belt on the deviation correction axis; V1: edge linear velocity of the conveyor belt on the previous support axis; R: length of the deviation correction axis; ɑ: lifting angle of the deviation correction axis; t2: time for the conveyor belt to move from the previous support axis to the deviation correction axis after deviation correction; The telescopic mechanism drives the end of the deviation-correcting shaft in the same deviation direction as the conveyor belt body to be lifted up by a height H'.

7. The conveyor belt deviation correction method according to claim 5 or 6, characterized in that: When the telescopic mechanism drives one end of the deviation-correcting shaft to lift, it first lifts 60% to 70% of the height H' at a predetermined speed, and then lifts at 20% to 30% of the predetermined speed.

8. The conveyor belt deviation correction method according to claim 7, characterized in that: The second visual sensor arranged behind the deflection correcting shaft detects the deviation angle of the conveyor belt after passing the deflection correcting shaft. When one end of the deflection correcting shaft is raised to the height H', when the second visual sensor detects that the conveyor belt has a deviation angle, the telescopic mechanism drives the deflection correcting shaft to continue to be raised at 20% to 30% of the predetermined speed until the second visual sensor detects that the deviation angle of the conveyor belt is zero.

9. A conveyor belt, characterized in that: The invention comprises a conveyor belt deviation correcting device as described in any one of claims 1 to 4.

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