A belt tear prevention control method and system

Abstract

This application provides a belt anti-tear control method and system. The belt anti-tear control method includes S1, obtaining the linear relationship between the belt conveyor bearing load and the motor current; S2, set the first current interval, the second current interval and the third current interval in order from small to large; S3, when the motor current is in the first current interval, maintain the material import speed at the beginning of the belt conveyor, and make the belt conveyor continue to work; S4, when the motor current is in the second current interval, slow down the material introduction speed at the beginning of the belt conveyor, and make the belt conveyor continue to work; S5, when the motor current is in the third current interval, stop importing materials to the starting end of the belt conveyor, and make the belt conveyor continue to work. The belt tear control method provided in this application can avoid excessive load carried by the belt conveyor, and thus effectively prevent the belt tear, thus prolonging the belt service life

Description

[0001] Description

[0002] A BELT TEAR PREVENTION CONTROL METHOD AND SYSTEM

[0003] FIELD OF THE DISCLOSURE

[0004] This application relates to the field of belt machine , in particular to a belt tear prevention control method and system .

[0005] BACKGROUND

[0006] In the laterite nickel ore hydrometallurgy, laterite nickel ore is usually washed to separate the larger gravel and gravel in laterite nickel ore , and the separated gravel and gravel are often transported by belt conveyor . Due to the di f ferent sources and batches of laterite nickel ore , there are large di f ferences in the content of gravel and gravel , which leads to large di f ferences in the amount of gravel and gravel to be transported after ore washing . I f the belt conveyor with high bearing capacity is used, its utili zation rate is limited . The belt machine with lower bearing capacity often exceeds the maximum load of the belt machine , which leads to the belt is prone to tear .

[0007] At present , because there are relatively few cases beyond the load of the belt , the mainstream method is to avoid the risk by detecting the tearing degree of the belt , such as the Chinese invention patent application with the application number of CN201911262032 . 8 , which can j udge the tearing degree of the belt through the visual image , so as to facilitate the maintenance and replacement of the belt . However, this detection method can only obtain the damage degree of the belt in time , but it can not avoid the problem of excessive load of the belt , and it can not extend the service cycle of the belt .

[0008] SUMMARY

[0009] The purpose of this application is to overcome the technical shortcomings mentioned above , propose a belt tear prevention control method and system, and solve the technical problem of how to avoid belt tear in the existing technology . In order to achieve the above technical purpose , this application adopts the following technical scheme :

[0010] On the one hand, this application provides a belt tear prevention control method, which includes :

[0011] S I . Obtaining the linear relationship between the belt conveyor bearing load and the motor current ;

[0012] S2 . Set the first current interval , the second current interval and the third current interval in order from small to large ;

[0013] 53 . When the motor current is in the first current interval , maintain the material import speed at the beginning of the belt conveyor, and make the belt conveyor continue to work;

[0014] 54 . When the motor current is in the second current interval , slow down the material introduction speed at the beginning of the belt conveyor, and make the belt conveyor continue to work;

[0015] 55 . When the motor current is in the third current interval , stop importing materials to the starting end of the belt conveyor, and make the belt conveyor continue to work .

[0016] In some embodiments , said step S5 comprises :

[0017] When the motor current is in the third current interval , control the belt conveyor to continue to work and continue to preset time ;

[0018] Within the preset time , i f the motor current returns to the first current interval , perform step S3 ; i f the motor current returns to the second current interval , perform step S4 ; i f the motor current is still in the third current interval , stop importing materials to the starting end of the belt machine and control the belt machine to stop .

[0019] In some embodiments , the preset time is 5 seconds .

[0020] In some embodiments , the control method also includes :

[0021] When the motor current is below the minimum value of the first current interval , the speed of the material introduction at the beginning of the belt machine is increased .

[0022] In some embodiments , said step S I includes :

[0023] Select several groups of material samples with di f ferent weights ;

[0024] Several groups of material samples were transported by belt conveyor in turn, and the motor current data corresponding to the transported material samples were obtained . According to the material samples and motor current data, the linear relationship between the belt conveyor load and the motor current at the same speed is fitted .

[0025] In some embodiments , said step S2 includes :

[0026] Choose di f ferent ambient temperatures ;

[0027] Test the bearing limit of the belt at di f ferent ambient temperatures ;

[0028] The relationship between ambient temperature and belt load limit is established .

[0029] According to the belt load limit , the first load interval , the second load interval and the third load interval are set in order from small to large .

[0030] The linear relationship between the belt conveyor load and the motor current is obtained under di f ferent ambient temperatures .

[0031] Set the first current interval , the second current interval and the third current interval according to the first load interval , the second load interval and the third load interval .

[0032] In some embodiments , the method of testing the load-bearing limit of the belt includes :

[0033] Two marking points are selected on the belt ;

[0034] Set the limit distance between two markers .

[0035] And the actual distance between two markers when they are in tight edge is obtained in real time .

[0036] Gradually increase the weight of mineral samples carried by the belt conveyor until the actual spacing is equal to the limit spacing;

[0037] The mineral sample weight at this time is the belt bearing limit .

[0038] In some embodiments , the actual spacing of two markers when they are on a tight edge is obtained in real time through laser range finder measurements .

[0039] In some embodiments , two marking points are located along the belt edge .

[0040] On the other hand, this application provides a belt tear prevention control system, which comprises a support frame , a belt , a controller, a motor, a current sensor and a material introduction device . The belt is mounted on the support frame , the motor drives and connects the belt to drive the belt to rotate , and the current sensor is used to detect the working current of the motor . The material importing device is used to import the material into the belt , and the controller is connected with the current sensor, the motor and the material importing device respectively . The controller applies the belt tearing control method .

[0041] Firstly, the linear relationship between the belt conveyor load and the motor current is obtained, and then the first current interval , the second current interval and the third current interval are set in turn . When the motor is in the first current interval , it indicates that the load of the belt conveyor is in a reasonable range , and the material import speed at the beginning of the belt conveyor can be maintained . When the motor is in the second current interval , it indicates that the load of the belt conveyor is large , and it is necessary to slow down the material introduction speed at the beginning of the belt conveyor to reduce the load of the belt conveyor . When the motor is in the third current interval , it indicates that the load of the belt machine is too large , and then stop importing materials to the starting end of the belt machine , and quickly reduce the load of the belt machine . The belt tear prevention control method provided in this application can avoid the excessive load of the belt machine , and then can ef fectively prevent the belt from tearing .

[0042] BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is the flow diagram of the belt tear prevention control method provided by the embodiment of this application .

[0044] DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0045] In order to make the purpose , technical scheme and advantages of this application more clearly, the application is further explained in detail by combining the attached drawings and embodiments . It is understood that the speci fic embodiments described herein are intended only to explain this application and are not intended to quali fy it .

[0046] In order to prolong the service cycle of the belt and avoid the condition of overload tearing, this application provides a belt anti-tearing control method, which can avoid the excessive load carried by the belt machine , and can ef fectively prevent the belt from tearing, and then extend the service cycle of the belt . It should be noted that the belt tear prevention control method described in this application is used for but not limited to belt machine , etc . For the convenience of explanation, in this application, the belt tear prevention control method is only applied to the belt machine as an example to illustrate , and the belt tear prevention control method applied to other types of equipment is essentially the same as the principle applied to the belt machine , which is not described here . In other words , the belt tear control method of this application is not limited to the belt tear prevention of the di f ference in gravel amount in the laterite nickel ore washing process , and can also be used for the belt tear prevention of other unstable material transportation .

[0047] Please refer to Figure 1 , which is the flow diagram of the belt tear prevention control method in an embodiment of this application . The belt tear prevention control method includes :

[0048] S I . Obtaining the linear relationship between the belt conveyor bearing load and the motor current ;

[0049] S2 . Set the first current interval , the second current interval and the third current interval in order from small to large ;

[0050] 53 . When the motor current is in the first current interval , maintain the material import speed at the beginning of the belt conveyor, and make the belt conveyor continue to work;

[0051] 54 . When the motor current is in the second current interval , slow down the material introduction speed at the beginning of the belt conveyor, and make the belt conveyor continue to work;

[0052] 55 . When the motor current is in the third current interval , stop importing materials to the starting end of the belt conveyor, and make the belt conveyor continue to work .

[0053] In this embodiment , the linear relationship between the belt conveyor load and the motor current is first obtained, and then the continuous first current interval , second current interval and third current interval are set successively . When the motor is in the first current interval , it indicates that the load of the belt conveyor is in a reasonable range , and the material import speed at the beginning of the belt conveyor can be maintained . When the motor is in the second current interval , it indicates that the load of the belt conveyor is large , and it is necessary to slow down the material introduction speed at the beginning of the belt conveyor to reduce the load of the belt conveyor . When the motor is in the third current interval , it indicates that the load of the belt machine is too large , and then stop importing materials to the starting end of the belt machine , and quickly reduce the load of the belt machine . The belt tear prevention control method provided in this application can avoid the excessive load of the belt machine , and then can ef fectively prevent the belt from tearing .

[0054] It is understandable that the speci fic values of the first current interval , the second current interval and the third current interval are related to the speci fic speci fications of the belt machine . In order to facilitate the personnel skilled in the field to clearly understand how to set the continuous first current interval , second current interval and third current interval , the speci fic values of the first current interval , second current interval and third current interval in a feasible embodiment are given for demonstration purposes , where , The first current interval is [ 5A, 10A) , the second current interval is [ 10A, 15A) , and the third current interval is [ 15A, +°° ] .

[0055] In some of these embodiments , the said step S5 comprises :

[0056] When the motor current is in the third current interval , control the belt conveyor to continue to work and continue to preset time ;

[0057] Within the preset time , i f the motor current returns to the first current interval , perform step S3 ; i f the motor current returns to the second current interval , perform step S4 ; i f the motor current is still in the third current interval , stop importing materials to the starting end of the belt machine and control the belt machine to stop .

[0058] In this embodiment , when the motor current is in the third current interval , it indicates that the belt conveyor carries a large load . I f the motor current returns to the first current interval or the second current interval within the preset time , it indicates that the load borne by the belt conveyor is reduced to an acceptable range , and then the material can be continued to the starting end of the belt conveyor . When the motor current is in the third current interval and lasts for a preset time , it indicates that the load carried by the belt machine has not been reduced to an acceptable range , so the belt machine needs to be stopped to prevent the belt from tearing and damage . On the basis of the above embodiments , in some of them, the preset time is 5 seconds .

[0059] In some of these embodiments , the control method also includes :

[0060] When the motor current is lower than the minimum value of the first current interval , the material introduction speed at the beginning of the belt conveyor is increased .

[0061] In this embodiment , when the motor current is lower than the first current range , it indicates that the load borne by the belt conveyor is low, and the material introduction speed at the beginning of the belt conveyor can be improved, thereby increasing the load carried by the belt conveyor, which helps to make full use of the bearing capacity of the belt conveyor and ensure its transmission ef ficiency .

[0062] In some of these embodiments , the said step S I comprises :

[0063] Select several groups of material samples with di f ferent weights ;

[0064] Several groups of material samples were transported by belt conveyor in turn, and the motor current data corresponding to the transported material samples were obtained .

[0065] According to the material samples and motor current data, the linear relationship between the belt conveyor load and the motor current at the same speed is fitted .

[0066] In this embodiment , several groups of material samples with di f ferent weights are selected, and several groups of material samples are transported by belt conveyor in turn, so as to obtain the motor current data when transporting each group of material samples . Finally, the linear relationship between the belt conveyor load and the motor current can be fitted according to the material samples and the motor current data . The more the material samples are grouped, the more accurate the linear relationship between the belt conveyor load and the motor current is fitted .

[0067] In some of these embodiments , the said step S2 comprises :

[0068] Choose di f ferent ambient temperatures ;

[0069] Test the bearing limit of the belt at di f ferent ambient temperatures ;

[0070] The relationship between ambient temperature and belt load limit is established .

[0071] According to the belt load limit , the first load interval , the second load interval and the third load interval are set in order from small to large . The linear relationship between the belt conveyor load and the motor current is obtained under di f ferent ambient temperatures .

[0072] Set the first current interval , the second current interval and the third current interval according to the first load interval , the second load interval and the third load interval .

[0073] In this embodiment , since there are di f ferences in the belt bearing limit under di f ferent environmental temperatures , the correlation relationship between the environmental temperature and the belt load limit is established, and then the first load interval , the second load interval and the third load interval can be set according to the belt bearing limit under the actual environmental temperature . Because there is a linear correlation between the motor current and the load si ze of the belt conveyor, the first current interval , the second current interval and the third current interval can be set according to the first load interval , the second load interval and the third load interval . Make the setting of the first current interval , the second current interval and the third current interval match the ambient temperature .

[0074] In some of the embodiments , the methods for testing the belt bearing limit include :

[0075] Two marking points are selected on the belt ;

[0076] Set the limit distance between two markers .

[0077] And the actual distance between two markers when they are in tight edge is obtained in real time .

[0078] Gradually increase the weight of mineral samples carried by the belt conveyor until the actual spacing is equal to the limit spacing;

[0079] The mineral sample weight at this time is the belt bearing limit .

[0080] It is understandable that the deformation degree of the belt reflects the bearing capacity of the belt , and i f the deformation degree of the belt is too large , the load exceeds the bearing limit of the belt . When the actual spacing of the two markers is equal to the limit spacing, it indicates that the deformation degree of the belt has approached its limit elastic deformation . I f the belt continues to deform, it is easy to make the belt broken . When the actual spacing of the two marks is equal to the limit spacing, the weight of the material carried by the belt machine is the limit load capacity of the belt machine . In some of these embodiments , the actual spacing when two markers are on a tight edge is obtained in real time by laser range finder measurements .

[0081] In this embodiment , a laser range finder is used to detect the spacing of two markers in order to facilitate the real-time detection of the actual spacing of two markers when they are on a tight edge .

[0082] In some of these embodiments , two marking points are located along the belt edge .

[0083] In this embodiment , since the center of the belt is used to carry the material , the marking point is arranged on the edge of the belt in order to avoid the material covering the marking point .

[0084] The application also provides a belt tear prevention control system, which comprises a support frame , a belt , a controller, a motor, a current sensor and a material importing device . The belt is mounted on the support frame , the motor drives and connects the belt to drive the belt to rotate , the current sensor is used to detect the working current of the motor, and the material importing device is used to import materials to the belt . The controller is connected with the current sensor, the motor and the material import device respectively, and the controller applies the belt tear prevention control method mentioned above .

[0085] In order to better understand this application, the technical scheme of this application is explained in detail in accordance with Figure 1 below :

[0086] Several groups of material samples with di f ferent weights are selected, and several groups of material samples are transported by belt conveyor in turn, so as to obtain the motor current data when conveying each group of material samples . Finally, the linear relationship between the belt conveyor load and the motor current can be fitted according to the material samples and the motor current data . Subsequently, consecutive first current interval , second current interval and third current interval are set in turn . When the motor is in the first current interval , it indicates that the load of the belt conveyor is in a reasonable range , and the material import speed at the beginning of the belt conveyor can be maintained . When the motor is in the second current interval , it indicates that the load of the belt conveyor is large , and it is necessary to slow down the material introduction speed at the beginning of the belt conveyor to reduce the load of the belt conveyor . When the motor is in the third current interval , it indicates that the load of the belt machine is too large , and then stop importing materials to the starting end of the belt machine , and quickly reduce the load of the belt machine . The belt tear prevention control method provided in this application can avoid the excessive load of the belt machine , and then can ef fectively prevent the belt from tearing .

[0087] The above speci fic mode of implementation of this application shall not limit the scope of protection of this application . Any other corresponding changes and deformations made according to the technical ideas of the application shall be included in the scope of protection of the claims of the Application .

Claims

WHAT IS CLAIMED IS1. A belt tear prevention control method, which is characterized by, including:

51. Obtaining the linear relationship between the belt conveyor bearing load and the motor current;52. Set the first current interval, the second current interval and the third current interval in order from small to large;53. When the motor current is in the first current interval, maintain the material import speed at the beginning of the belt conveyor, and make the belt conveyor continue to work;54. When the motor current is in the second current interval, slow down the material introduction speed at the beginning of the belt conveyor, and make the belt conveyor continue to work;55. When the motor current is in the third current interval, stop importing materials to the starting end of the belt conveyor, and make the belt conveyor continue to work.

2. According to claim 1, the belt tear prevention control method is characterized in that the step S5 comprises: when the motor current is in the third current interval, the control belt machine continues to work and lasts for a preset time;Within the preset time, if the motor current returns to the first current interval, perform step S3; if the motor current returns to the second current interval, perform step S4; if the motor current is still in the third current interval, stop importing materials to the starting end of the belt machine and control the belt machine to stop.

3. According to claim 2, the belt tear prevention control method is characterized by the preset time of 5 seconds.

4. According to claim 1, the belt tear prevention control method is characterized in that the control method also includes:When the motor current is lower than the minimum value of the first current interval, the material introduction speed at the beginning of the belt conveyor is increased.

5. According to claim 1, the belt tear prevention control method is characterized in that the step SI comprises:Select several groups of material samples with different weights; Several groups of material samples were transported by belt conveyorin turn, and the motor current data corresponding to the transported material samples were obtained . According to the material samples and motor current data, the linear relationship between the belt conveyor load and the motor current at the same speed is fitted .6 . According to claim 1 , the belt tear prevention control method is characteri zed by that the step S2 comprises :Selecting di f ferent ambient temperatures ;Test the bearing limit of the belt at di f ferent ambient temperatures ;The relationship between ambient temperature and belt load limit is established .According to the belt load limit , the first load interval , the second load interval and the third load interval are set in order from small to large .The linear relationship between the belt conveyor load and the motor current is obtained under di f ferent ambient temperatures .Set the first current interval , the second current interval and the third current interval according to the first load interval , the second load interval and the third load interval .7 . According to claim 6 , the belt tear prevention control method is characteri zed in that the method for testing the bearing limit of the belt includes :Two marking points are selected on the belt ;Set the limit distance between two markers ;And the actual distance between two markers when they are in tight edge is obtained in real time ;Gradually increase the weight of mineral samples carried by the belt conveyor until the actual spacing is equal to the limit spacing;The mineral sample weight at this time is the belt bearing limit .8 . According to claim 7 , the belt tear prevention control method is characteri zed by real-time measurement of the laser interval finder to obtain the actual distance between the two markers when they are on the tight edge .9 . According to claim 7 , the belt tear prevention control method is characteri zed by two marking points located on the belt edge .10 . A belt tear prevention control system, which is characteri zed by, including a support frame , belt , controller, motor, current sensor and material import device , the belt is installed in thesupport frame , the motor drive connected with the belt , to drive the belt rotation, the current sensor to detect the motor working current The material importing device is used to import the material to the belt , and the controller is connected with the current sensor, the motor and the material importing device respectively . The controller applies the belt anti-tearing control method mentioned in any item of claim 1- 9 .

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