Belt conveyor group conveying system and method based on dynamic coal quantity data

Abstract

A belt conveyor system based on dynamic coal quantity data, which uses the detected current dynamic load q of coal accumulated on the current belt conveyor. 实本 The bulk density of the coal is calculated from the dynamic volume information of this level; based on the detected dynamic volume information of the coal on the next lower-level belt conveyor and the bulk density, the current dynamic load q of the coal arriving on the next lower-level belt conveyor is calculated. 实下 Calculate the real-time dynamic load q on the belt of this level of belt conveyor. 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G By comparison, a corresponding dynamic acceleration value 'a' is selected to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor gradually accelerates from a stationary state to the rated belt speed. This application also provides a belt conveyor group conveying method based on dynamic coal quantity data.

Description

Technical Field

[0001] This invention relates to the field of coal mine belt conveyor technology, and in particular to a belt conveyor group conveying system and method based on dynamic coal quantity data. Background Technology

[0002] In fully mechanized coal mining faces, coal transportation is primarily accomplished through the coordinated operation of scraper conveyors, transfer conveyors, and belt conveyors. Coal produced by the coal mining machine is transported via scraper conveyors to transfer conveyors, then transferred to belt conveyors, and finally delivered to the surface. Since the scraper conveyors, transfer conveyors, and belt conveyors all operate at constant speeds, changes in the amount of coal produced by the mining machine lead to changes in the amount of coal transported by the scraper conveyors, consequently affecting the amount delivered to the transfer conveyors, and ultimately resulting in an unstable amount delivered to the belt conveyors. Because the scraper conveyors, transfer conveyors, and belt conveyors continuously transport coal, and the instantaneous coal transport capacity of the belt conveyor is smaller than that of the scraper conveyors and transfer conveyors, the standard range of instantaneous coal transport capacity of the entire transportation system should be consistent with the standard range of instantaneous coal transport capacity of the belt conveyors to ensure the entire transportation system maintains normal operation.

[0003] When the instantaneous coal conveying capacity of the transfer machine exceeds the maximum value of the system's instantaneous coal conveying capacity standard range, the belt conveyor is prone to a series of problems such as coal piling up, which greatly reduces the working performance of the belt conveyor. On the other hand, if the instantaneous coal conveying capacity of the transfer machine is less than the minimum value of the system's instantaneous coal conveying capacity standard range, the belt conveyor's carrying capacity will be wasted, thereby reducing the overall coal transportation volume of the coal mine.

[0004] To address the aforementioned technical problems, Chinese invention patent No. 202110919678.X, entitled "A Speed ​​Control System and Method for a Belt Conveyor Based on Load Distribution," provides the following technical solution: Several coal flow detection sensors and several speed detection sensors are respectively installed on the belt conveyor and connected to an intelligent coal flow explosion-proof control box. These sensors detect the volume of coal on the conveyor and the belt speed, transmitting the data to the intelligent coal flow explosion-proof control box. The speed detection sensors work in conjunction with the coal flow detection sensors to determine the location of the coal by measuring the volume of the coal and the speed of the conveyor belt. This data is then transmitted to a monitoring server via the intelligent coal flow explosion-proof control box. The speed control unit in the monitoring server rationally arranges the coal flow detection sensors according to the belt speed of the preceding belt conveyor, ensuring a time lead between the detection of coal flow and the speed adjustment of the local belt conveyor. The time t from detecting a change in coal volume to the arrival of the coal on the local belt conveyor is considered, and the acceleration process of the belt conveyor is completed within this time t. This achieves real-time adaptive adjustment of the main conveyor system speed to prevent slippage and material accumulation.

[0005] However, the aforementioned existing technology calculates the coal flow rate based on the real-time detected coal volume and conveyor belt speed, and adjusts the speed of the belt conveyor in the coal transport state according to the coal flow rate. It does not take into account the problems that exist when multi-level belt conveyor groups are started / stopped. For example, when the belt conveyor in the multi-level belt conveyor group is under heavy load, there are often problems such as coal spillage, slippage, and material accumulation caused by excessively long ineffective running time or excessive load during start / stop. In severe cases, it can even lead to damage to the frame, tensioning device and belt. Summary of the Invention

[0006] In view of this, it is necessary to provide a belt conveyor system based on dynamic coal quantity data to avoid coal spillage, slippage, and stockpiling when restarting a multi-level belt conveyor group after shutdown.

[0007] It is also necessary to provide a conveying method for belt conveyor groups based on dynamic coal quantity data to avoid coal spillage, slippage, and stockpiling during the start-up / shutdown of multi-level belt conveyor groups.

[0008] A belt conveyor system based on dynamic coal quantity data includes: at least two belt conveyors, a coal weight detection device, a coal volume detection device, a speed detection device, a variable frequency drive device, and a control device. The control device is electrically connected to the coal weight detection device, the coal volume detection device, the speed detection device, and the variable frequency drive device. The number of variable frequency drive devices corresponds to the number of belt conveyors. The first belt conveyor to receive coal is the primary belt conveyor, and the subsequent belt conveyors to receive coal are the next-level belt conveyors.

[0009] This stage of the belt conveyor is equipped with a coal weight detection device, a coal volume detection device, and a speed detection device. The coal weight detection device is used to detect the dynamic weight information q of the coal being conveyed on this stage of the belt conveyor. 实本 The dynamic volume information of the coal conveyed on the belt conveyor at this stage is detected using a coal volume detection device, and the conveying speed information (v) on the belt conveyor at this stage is detected using a speed detection device. 实本 ;

[0010] The lower-level belt conveyor is equipped with a coal volume detection device and a speed detection device. The coal volume detection device detects the dynamic volume information of the coal conveyed on the lower-level belt conveyor, and the speed detection device detects the conveying speed information v on the lower-level belt conveyor. 实下 ;

[0011] The control device uses the detected current dynamic load q of the coal accumulated on the current stage belt conveyor. 实本The dynamic volume information is used to calculate the bulk density of the coal. The control device also calculates the current dynamic load q of the coal arriving at the next lower-level belt conveyor based on the detected lower-level dynamic volume information of the coal on the next lower-level belt conveyor and the bulk density. 实下 The control device uses Formula 1 to calculate the real-time dynamic load q on the belt of the current-stage belt conveyor. 动本 ,

[0012] q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1;

[0013] The control device also responds to shutdown operations, storing the aforementioned current dynamic load q during shutdown. 实下 Real-time dynamic load q 动本 ;

[0014] The control device also responds to the start operation by acquiring the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G The control device compares the real-time dynamic load q. 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 The control device controls the output acceleration curve of the variable frequency speed control drive to gradually accelerate the belt conveyor from a stationary state to the rated belt speed; the control device compares the real-time dynamic load q 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 This is used to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

[0015] A belt conveyor group conveying method based on dynamic coal quantity data, applicable to a belt conveyor group containing at least two belt conveyors, wherein the first belt conveyor receiving coal is the current-level belt conveyor, and the belt conveyors receiving coal subsequently are the next-level belt conveyors, comprising the following steps:

[0016] A coal weight detection device, a coal volume detection device, and a speed detection device are installed on this stage of the belt conveyor to detect the dynamic weight information q of the coal conveyed on this stage of the belt conveyor. 实本The dynamic volume information of the coal conveyed on the current-stage belt conveyor is detected using a coal volume detection device, and the conveying speed information (v) on the current-stage belt conveyor is detected using a speed detection device. 实本 ;

[0017] A coal volume detection device and a speed detection device are installed on the lower-level belt conveyor. The coal volume detection device detects the dynamic volume information of the coal conveyed on the lower-level belt conveyor, and the speed detection device detects the conveying speed information v on the lower-level belt conveyor. 实下 ;

[0018] Based on the detected current dynamic load q of the coal accumulated on this level of the belt conveyor. 实本 The bulk density of the coal is calculated from the dynamic volume information at this level.

[0019] Based on the detected dynamic volume information of the coal on the lower-level belt conveyor and the bulk density, the current dynamic load q of the coal arriving at the lower-level belt conveyor is calculated. 实下 ;

[0020] Calculate the real-time dynamic load q on the belt of this level of belt conveyor using Formula 1. 动本 ,

[0021] q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1;

[0022] Store the current dynamic load q before shutdown. 实下 Real-time dynamic load q 动本 ;

[0023] Before startup, obtain the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 To control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor gradually accelerates from a stationary state to the rated belt speed; and to compare the real-time dynamic load q 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动This is used to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

[0024] In the aforementioned belt conveyor system and method based on dynamic coal quantity data, the current dynamic load q of the coal accumulated on the current belt conveyor is determined. 实本 The bulk density of the coal is calculated from the dynamic volume information of this level; based on the detected dynamic volume information of the coal on the next lower-level belt conveyor and the bulk density, the current dynamic load q of the coal arriving on the next lower-level belt conveyor is calculated. 实下 Calculate the real-time dynamic load q on the belt of this level of belt conveyor. 动本 Before shutdown, store the current dynamic load q. 实下 Real-time dynamic load q 动本 Before startup, obtain the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G When the dynamic acceleration value 'a' is greater than the original set acceleration value 'a', the variable frequency speed control drive device outputs an acceleration curve to gradually accelerate the belt conveyor from a stationary state to the rated belt speed; when the real-time dynamic load 'q' is greater than the rated 'q', the dynamic acceleration value 'a' is selected to control the acceleration curve of the variable frequency speed control drive device. G When the dynamic acceleration value a is less than the original set acceleration value a, the variable frequency speed control drive device outputs an acceleration curve to gradually accelerate the belt conveyor from a stationary state to the rated belt speed. By combining the real-time coal material information carried by the belts of each level of belt conveyor with their corresponding acceleration, and according to the real-time coal material information and the acceleration of the upper and lower level belt conveyors, the safest and most efficient starting acceleration is given, thereby avoiding coal spillage, slippage, and material accumulation when restarting a multi-level belt conveyor group after it has stopped. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a belt conveyor group conveying system based on dynamic coal quantity data, which is a preferred embodiment.

[0026] Figure 2 for Figure 1 A schematic diagram of the functional modules of a belt conveyor system based on dynamic coal quantity data.

[0027] Figure 3 This is a schematic diagram of the functional modules of the control device.

[0028] Figure 4This is a schematic diagram of the functional units for selecting modules.

[0029] The diagram shows: a belt conveyor system based on dynamic coal quantity data (10), a belt conveyor (11), a coal weight detection device (12), a coal volume detection device (13), a speed detection device (14), a variable frequency speed control drive device (15), a control device (16), a receiving module (160), a bulk density calculation module (161), a current dynamic load calculation module for the lower-level belt conveyor (162), a current dynamic load calculation module for the current-level belt conveyor (163), a recording module (164), a comparison module (165), a selection module (166), a comparison unit (1660), a first judgment selection unit (1661), a second judgment selection unit (1662), a third judgment selection unit (1663), a fourth judgment selection unit (1664), a fifth judgment selection unit (1665), a sixth judgment selection unit (1666), and an output unit (1667). Detailed Implementation

[0030] Please also refer to Figure 1 and Figure 2 The belt conveyor system 10 based on dynamic coal quantity data of this application includes: at least two belt conveyors 11, a coal weight detection device 12, a coal volume detection device 13, a speed detection device 14, a variable frequency drive device 15, and a control device 16. The control device 16 is electrically connected to the coal weight detection device 12, the coal volume detection device 13, the speed detection device 14, and the variable frequency drive device 15. The number of variable frequency drive devices 15 corresponds to the number of belt conveyors 11. For example, one variable frequency drive device 15 is connected to one belt conveyor 11, wherein the first belt conveyor 11 that receives coal is the primary belt conveyor, and the belt conveyor that receives coal conveyed by the primary belt conveyor is the secondary belt conveyor.

[0031] The belt conveyor is equipped with a coal weight detection device 12, a coal volume detection device 13, and a speed detection device 14, so as to use the coal weight detection device 12 to detect the dynamic weight information q of the coal conveyed on the belt conveyor. 实本 The dynamic volume information of the coal conveyed on the belt conveyor at this stage is detected by the coal volume detection device 13, and the conveying speed information v on the belt conveyor at this stage is detected by the speed detection device 14. 实本 ;

[0032] A coal volume detection device 13 and a speed detection device 14 are installed on the lower-level belt conveyor. The coal volume detection device 13 detects the dynamic volume information of the coal conveyed on the lower-level belt conveyor, and the speed detection device 14 detects the conveying speed information v on the lower-level belt conveyor. 实下 ;

[0033] Control device 16 determines the current dynamic load q of the coal accumulated on the current stage belt conveyor based on the detected data. 实本 The dynamic volume information is used to calculate the bulk density of the coal. The control device 16 also calculates the current dynamic load q of the coal arriving at the lower-level belt conveyor based on the detected lower-level dynamic volume information of the coal on the lower-level belt conveyor and the bulk density. 实下 Control device 16 calculates the real-time dynamic load q on the belt of this level of belt conveyor using Formula 1. 动本 Or, the real-time dynamic load q on the belt of the first belt conveyor to receive coal between two adjacent belt conveyors. 动本 ,

[0034] q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1;

[0035] Control device 16 also responds to shutdown operations, storing the aforementioned current dynamic load q during shutdown. 实下 Real-time dynamic load q 动本 ;

[0036] Please also refer to Table 1. The acceleration value output by the variable frequency speed control drive device 15 has the corresponding relationship with the weight of the material carried by the conveyor belt, as shown in Table 1. This correspondence was summarized and calculated by the applicant in the actual production process. The control device 16 selects according to the correspondence shown in Table 1. Specifically, the control device 16 also responds to the start operation and obtains the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G In comparison, the control device 16 compares the real-time dynamic load q. 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 The variable frequency drive 15 is used to control the output acceleration curve of the variable frequency speed control drive device 15, so that the belt conveyor 11 connected to it gradually accelerates from a stationary state to the rated belt speed; the control device 16 compares the real-time dynamic load q 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 The variable frequency speed control drive device 15 is used to control the output acceleration curve so that the belt conveyor connected to it can gradually accelerate from a stationary state to the rated belt speed.

[0037] Table 1

[0038]

[0039] The control device 16 is a microcontroller or single-chip microcomputer running a computer application program that performs predetermined functions. This computer application program is used to calculate the current dynamic load of the belt conveyor, select and output the dynamic acceleration value. After running the computer application program, the control device 16 generates the following functional modules, which are also described below. Figure 2 The control device 16 includes: a receiving module 160, a bulk density calculation module 161, a current dynamic load calculation module 162 for the lower-level belt conveyor, a current dynamic load calculation module 163 for the current-level belt conveyor, a recording module 164, a comparison module 165, and a selection module 166. The receiving module 160 is used to receive the corresponding dynamic weight information q generated by the coal weight detection device 12, the coal volume detection device 13, and the speed detection device 14 installed on the current-level belt conveyor. 实本、 Dynamic volume information and conveying speed information at this level 实本 The receiving module 160 is also used to receive the corresponding dynamic volume information and conveying speed information v of the lower-level belt conveyor generated by the coal volume detection device 12 and speed detection device 14 installed on the lower-level belt conveyor. 实下 ;

[0040] The bulk density calculation module 161 calculates the current dynamic load q of the coal accumulated on the current belt conveyor. 实本 The bulk density of the coal is calculated using dynamic volume information.

[0041] The downstream belt conveyor current dynamic load calculation module 162 calculates the current dynamic load q of the coal arriving at the downstream belt conveyor based on the downstream dynamic volume information of the coal on the downstream belt conveyor and the bulk density received by the receiving module 160. 实下 ;

[0042] The current dynamic load calculation module 163 of this level belt conveyor uses Formula 1 to calculate the real-time dynamic load q on the belt of this level belt conveyor. 动本 ,

[0043] q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1;

[0044] Recording module 164 responds to the shutdown operation and stores the current dynamic load q during shutdown. 实下Real-time dynamic load q 动本 ;

[0045] Comparison module 165 responds to the start operation and obtains the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G At that time, the first signal is output to the selection module 166, and the real-time dynamic load q is compared. 动本 Greater than the rated q G At that time, a second signal is output to the selection module 166.

[0046] Module 166 responds to the first signal and selects a dynamic acceleration value a greater than the originally set acceleration value a. 动 The variable frequency drive 15 outputs an acceleration curve to gradually accelerate the belt conveyor from a stationary state to the rated belt speed; the selection module 166 responds to the second signal and selects a dynamic acceleration value a that is less than the originally set acceleration value a. 动 The variable frequency speed control drive device 15 is used to control the output acceleration curve so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

[0047] Furthermore, please also refer to Table 2, which is a preferred embodiment of Table 1, showing the actual value of 'a' and the tape load 'q'. G The equivalent mass of the conveyor's moving parts transitioning to linear motion on the conveyor belt is related to the sum of the equivalent masses of the conveyor's rotating parts transitioning to linear motion on the conveyor belt. The applicant summarized and calculated this relationship during actual production. The comparison module 166 is selected according to the correspondence shown in Table 2, specifically: the comparison module 166 includes a comparison unit 1660, a first judgment selection unit 1661, a second judgment selection unit 1662, a third judgment selection unit 1663, and a fourth judgment selection unit 1664; the comparison unit 1660 compares the real-time dynamic load q... 动本 Less than the rated q G When the first selection signal is output to the first selection unit 1661, the second selection unit 1662, the third selection unit 1663, and the fourth selection unit 1664, the first selection unit 1661 responds to the first selection signal and determines q. 动 Is it greater than or equal to 0.8q? G And less than 0.95q G After determining q 动 Greater than or equal to 0.8q G And less than 0.95qG At that time, the selected dynamic acceleration value a 动 The value is 1.03a;

[0048] Table 2

[0049]

[0050] The second judgment and selection unit 1662 responds to the first selection signal and judges q. 动 Is it greater than or equal to 0.6q? G And less than 0.8q G After determining q 动 Greater than or equal to 0.6q G And less than 0.8q G At that time, the selected dynamic acceleration value a 动 The value is 1.11a;

[0051] The third judgment and selection unit 1663 responds to the first selection signal and judges q. 动 Is it greater than or equal to 0.2q? G And less than 0.6q G After determining q 动 Greater than or equal to 0.2q G And less than 0.6q G At that time, the selected dynamic acceleration value a 动 The value is 1.25a;

[0052] The fourth selection unit 1664 responds to the first selection signal and determines q. 动 Is it less than 0.2q? G， After determining q 动 Less than 0.2q G At that time, the selected dynamic acceleration value a 动 The value is 1.5a.

[0053] Furthermore, the comparison module 166 also includes a fifth judgment and selection unit 1665 and a sixth judgment and selection unit 1666. The comparison unit 1660 compares the real-time dynamic load amount q. 动本 Greater than the rated q G When the second selection signal is output, it is sent to the fifth judgment and selection unit 1665 and the sixth judgment and selection unit 1666.

[0054] The fifth selection unit 1665 responds to the second selection signal and determines q. 动 Is it greater than or equal to 1.05q? G or less than 1.1q G After determining q 动 Greater than or equal to 1.05q G At that time, the selected dynamic acceleration value a 动The value is 0.95a;

[0055] The sixth judgment and selection unit 1666 responds to the second selection signal and judges q. 动 Is it greater than 1.1q? G After determining q 动 Greater than 1.1q G At that time, the selected dynamic acceleration value a 动 The value is 0.9a.

[0056] Furthermore, the comparison module 166 also includes an output unit 1667, which is used to output the corresponding dynamic acceleration value 'a' selected by the first judgment selection unit 1661, the second judgment selection unit 1662, the third judgment selection unit 1663, the fourth judgment selection unit 1664, the fifth judgment selection unit 1665, and the sixth judgment selection unit 1666. 动 Provided to variable frequency speed control drive devices.

[0057] In other implementations, the acceleration value of this level (6 levels in total) is first calculated according to Table 2, and then the starting acceleration value of each level of the belt conveyor is output according to the rules in Table 3. For example, the acceleration values ​​of each level in a four-level belt conveyor group can be divided into four acceleration levels according to positive large NB{6, 5}, positive small NS{4}, negative large PB{3, 2} and negative small PS{1}. That is, 0.95a is negative small PS, 0.9a and 1.03a are negative large PB, 1.11a is positive small NS, and 1.25a and 1.5a are positive large NB. The comparison module 166 also includes acceleration levels. The adjustment unit, specifically the acceleration level adjustment unit, adjusts the calculated required acceleration level for each stage of the belt conveyor according to a predetermined rule to obtain the adjusted acceleration level. Then, it controls the output acceleration curve of the variable frequency drive device based on the adjusted acceleration level. The predetermined rule is that the acceleration level of the current stage belt conveyor must be lower than the acceleration level of the adjacent next-level belt conveyor. The comparison module also includes an output unit, which selects the corresponding dynamic acceleration value 'a' based on the adjusted acceleration level from the acceleration level adjustment unit. 动 and the selected dynamic acceleration value a 动Provided to the variable frequency speed control drive device. For example, the acceleration level adjustment unit adjusts the acceleration level according to the correspondence shown in Table 3: For example, in the gray group in Table 3, when the acceleration value calculated in Table 2 is "the current belt conveyor is NB, the second-level belt conveyor is any one of (NB, NS, PB, PS), the third-level belt conveyor is any one of (NB, NS, PB, PS), and the fourth-level belt conveyor is any one of (NB, NS, PB, PS), the actual starting acceleration value output by the output unit is: the current belt conveyor is NB, the second-level belt conveyor is NB, the third-level belt conveyor is NB, and the fourth-level belt conveyor is NB".

[0058] Table 3

[0059]

[0060] Furthermore, this application also provides a belt conveyor group conveying method based on dynamic coal quantity data. This method is applied to a belt conveyor group containing at least two belt conveyors, wherein the first belt conveyor receiving coal is the current-level belt conveyor, and subsequent belt conveyors receiving coal are the next-level belt conveyors. The method includes the following steps:

[0061] A coal weight detection device, a coal volume detection device, and a speed detection device are installed on this stage of the belt conveyor to detect the dynamic weight information q of the coal conveyed on this stage of the belt conveyor. 实本 The dynamic volume information of the coal conveyed on the belt conveyor at this stage is detected using a coal volume detection device, and the conveying speed information (v) on the belt conveyor at this stage is detected using a speed detection device. 实本 ;

[0062] A coal volume detection device and a speed detection device are installed on the lower-level belt conveyor. The coal volume detection device detects the dynamic volume information of the coal conveyed on the lower-level belt conveyor, and the speed detection device detects the conveying speed information v on the lower-level belt conveyor. 实下 ;

[0063] Based on the detected current dynamic load q of the coal accumulated on this level of the belt conveyor. 实本 The bulk density of the coal is calculated from the dynamic volume information at this level.

[0064] Based on the detected dynamic volume information of the coal on the lower-level belt conveyor and the bulk density, the current dynamic load q of the coal arriving at the lower-level belt conveyor is calculated. 实下 ;

[0065] Calculate the real-time dynamic load q on the belt of this level of belt conveyor using Formula 1.动本 ,

[0066] q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1;

[0067] Store the current dynamic load q before shutdown. 实下 Real-time dynamic load q 动本 ;

[0068] Before startup, obtain the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 To control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor gradually accelerates from a stationary state to the rated belt speed; and to compare the real-time dynamic load q 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 This is used to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

[0069] Among them, "comparing the real-time dynamic load q" 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 To control the operation of the variable frequency speed control drive device, so as to adjust the acceleration and dynamic acceleration value a of the belt conveyor at startup. 动 The corresponding steps are as follows: First, compare the real-time dynamic load q... 动本 Less than the rated q G When, determine q 动 Is it greater than or equal to 0.8q? G And less than 0.95q G q 动 Is it greater than or equal to 0.6q? G And less than 0.8q G q 动 Is it greater than or equal to 0.2q? G And less than 0.6q G q 动Is it less than 0.2q? G ;

[0070] After determining q 动 Greater than or equal to 0.8q G And less than 0.95q G At that time, the selected dynamic acceleration value a 动 The value is 1.03a;

[0071] After determining q 动 Greater than or equal to 0.6q G And less than 0.8q G At that time, the selected dynamic acceleration value a 动 The value is 1.11a;

[0072] After determining q 动 Greater than or equal to 0.2q G And less than 0.6q G At that time, the selected dynamic acceleration value a 动 The value is 1.25a;

[0073] After determining q 动 Less than 0.2q G At that time, the selected dynamic acceleration value a 动 The value is 1.5a.

[0074] Among them, "comparing the real-time dynamic load q" 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 To control the operation of the variable frequency speed control drive device, so as to adjust the acceleration and dynamic acceleration value a of the belt conveyor at startup. 动 The corresponding steps are as follows: First, compare the real-time dynamic load q... 动本 Greater than the rated q G When, determine q 动 Is it greater than or equal to 1.05q? G And less than 1.1q G q 动 Is it greater than 1.1q? G ;

[0075] After determining q 动 Greater than or equal to 1.05q G At that time, the selected dynamic acceleration value a 动 The value is 0.95a;

[0076] After determining q 动 Greater than 1.1q G At that time, the selected dynamic acceleration value a 动 The value is 0.9a.

[0077] For example, a belt conveyor group includes four belt conveyors, which will carry the selected dynamic acceleration value a. 动 It is divided into four acceleration levels: 0.95a is negative small PS, 0.9a and 1.03a are negative large PB, 1.11a is positive small NS, and 1.25a and 1.5a are positive large NB;

[0078] The calculation of the required acceleration level for each level of belt conveyor is adjusted according to a predetermined rule to obtain the adjusted acceleration level. Then, the variable frequency speed control drive device outputs an acceleration curve based on the adjusted acceleration level. The predetermined rule is that the acceleration level of the current level belt conveyor is less than the acceleration level of the next level belt conveyor adjacent to the current level belt conveyor.

[0079] In the aforementioned belt conveyor system and method based on dynamic coal quantity data, the current dynamic load q of the coal accumulated on the current belt conveyor is determined. 实本 The bulk density of the coal is calculated from the dynamic volume information of this level; based on the detected dynamic volume information of the coal on the next lower-level belt conveyor and the bulk density, the current dynamic load q of the coal arriving on the next lower-level belt conveyor is calculated. 实下 Calculate the real-time dynamic load q on the belt of this level of belt conveyor. 动本 Before shutdown, store the current dynamic load q. 实下 Real-time dynamic load q 动本 Before startup, obtain the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G When the dynamic acceleration value 'a' is greater than the original set acceleration value 'a', the variable frequency speed control drive device outputs an acceleration curve to gradually accelerate the belt conveyor from a stationary state to the rated belt speed; when the real-time dynamic load 'q' is greater than the rated 'q', the dynamic acceleration value 'a' is selected to control the acceleration curve of the variable frequency speed control drive device. G When the dynamic acceleration value a is less than the original set acceleration value a, the variable frequency speed control drive device outputs an acceleration curve to gradually accelerate the belt conveyor from a stationary state to the rated belt speed. By combining the real-time coal material information carried by the belts of each level of belt conveyor with their corresponding acceleration, and according to the real-time coal material information and the acceleration of the upper and lower level belt conveyors, the safest and most efficient starting acceleration is given, thereby avoiding coal spillage, slippage, and material accumulation when restarting a multi-level belt conveyor group after it has stopped.

Claims

1. A belt conveyor system based on dynamic coal quantity data, characterized in that... include: At least two belt conveyors, a coal weight detection device, a coal volume detection device, a speed detection device, a variable frequency speed control drive device, and a control device; The control device is electrically connected to the coal weight detection device, coal volume detection device, speed detection device, and variable frequency speed control drive device. The number of variable frequency speed control drive devices corresponds to the number of belt conveyors. The first belt conveyor to receive coal is the primary belt conveyor, and the belt conveyors that receive coal subsequently are the next-level belt conveyors. This stage of the belt conveyor is equipped with a coal weight detection device, a coal volume detection device, and a speed detection device. The coal weight detection device is used to detect the dynamic weight information q of the coal being conveyed on this stage of the belt conveyor. 实本 The dynamic volume information of the coal conveyed on the current-stage belt conveyor is detected using a coal volume detection device, and the conveying speed information (v) on the current-stage belt conveyor is detected using a speed detection device. 实本 ; The lower-level belt conveyor is equipped with a coal volume detection device and a speed detection device. The coal volume detection device detects the dynamic volume information of the coal conveyed on the lower-level belt conveyor, and the speed detection device detects the conveying speed information v on the lower-level belt conveyor. 实下 ; The control device uses the detected current dynamic load q of the coal accumulated on the current stage belt conveyor. 实本 The dynamic volume information is used to calculate the bulk density of the coal. The control device also calculates the current dynamic load q of the coal arriving at the next lower-level belt conveyor based on the detected lower-level dynamic volume information of the coal on the lower-level belt conveyor and the bulk density. 实下 The control device uses Formula 1 to calculate the real-time dynamic load q on the belt of this level of belt conveyor. 动本 , q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1; The control device also responds to shutdown operations, storing the aforementioned current dynamic load q during shutdown. 实下 Real-time dynamic load q 动本 ; The control device also responds to the start operation by acquiring the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G The control device compares the real-time dynamic load q. 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 The control device controls the output acceleration curve of the variable frequency speed control drive to gradually accelerate the belt conveyor from a stationary state to the rated belt speed; the control device compares the real-time dynamic load q 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 This is used to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

2. The belt conveyor group conveying system based on dynamic coal quantity data as described in claim 1, characterized in that: The control device includes: a receiving module, a bulk density calculation module, a current dynamic load calculation module for the lower-level belt conveyor, a current dynamic load calculation module for the current-level belt conveyor, a recording module, a comparison module, and a selection module. The receiving module is used to receive the corresponding dynamic weight information q generated by the coal weight detection device, coal volume detection device, and speed detection device installed on the current-level belt conveyor. 实本、 Dynamic volume information and conveying speed information at this level 实本 The receiving module is also used to receive the corresponding dynamic volume information and conveying speed information v of the lower-level belt conveyor generated by the coal volume detection device and speed detection device installed on the lower-level belt conveyor. 实下 ; The bulk density calculation module calculates the current dynamic load q of the coal accumulated on the current belt conveyor. 实本 The bulk density of the coal is calculated using dynamic volume information. The downstream belt conveyor current dynamic load calculation module calculates the current dynamic load q of the coal arriving at the downstream belt conveyor based on the downstream dynamic volume information of the coal on the downstream belt conveyor received by the receiving module and the bulk density. 实下 ; The current dynamic load calculation module for this level of belt conveyor uses Formula 1 to calculate the real-time dynamic load q on the belt of this level of belt conveyor. 动本 , q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1; The recording module responds to the shutdown operation and stores the current dynamic load q during shutdown. 实下 Real-time dynamic load q 动本 ; The comparison module responds to the start operation and obtains the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G At that time, the first signal is output to the selection module, and the real-time dynamic load q is compared. 动本 Greater than the rated q G At that time, a second signal is output to the selection module. The module responds to the first signal and selects a dynamic acceleration value a greater than the originally set acceleration value a. 动 The variable frequency drive unit outputs an acceleration curve to gradually accelerate the belt conveyor from a standstill to its rated belt speed; the selection module responds to the second signal and selects a dynamic acceleration value 'a' that is less than the originally set acceleration value 'a'. 动 This is used to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

3. The belt conveyor group conveying system based on dynamic coal quantity data as described in claim 2, characterized in that: The comparison module includes a comparison unit, a first judgment and selection unit, a second judgment and selection unit, a third judgment and selection unit, and a fourth judgment and selection unit; the comparison unit compares the real-time dynamic load q. 动本 Less than the rated q G When the first selection signal is output to the first selection unit, the second selection unit, the third selection unit, and the fourth selection unit, the first selection unit responds to the first selection signal and determines q. 动 Is it greater than or equal to 0.8q? G And less than 0.95q G After determining q 动 Greater than or equal to 0.8q G And less than 0.95q G At that time, the selected dynamic acceleration value a 动 The value is 1.03a; The second selection unit responds to the first selection signal and determines q. 动 Is it greater than or equal to 0.6q? G And less than 0.8q G After determining q 动 Greater than or equal to 0.6q G And less than 0.8q G At that time, the selected dynamic acceleration value a 动 The value is 1.11a; The third judgment and selection unit responds to the first selection signal and judges q. 动 Is it greater than or equal to 0.2q? G And less than 0.6q G After determining q 动 Greater than or equal to 0.2q G And less than 0.6q G At that time, the selected dynamic acceleration value a 动 The value is 1.25a; The fourth selection unit responds to the first selection signal and determines q. 动 Is it less than 0.2q? G， After determining q 动 Less than 0.2q G At that time, the selected dynamic acceleration value a 动 The value is 1.5a; The comparison module also includes a fifth judgment and selection unit and a sixth judgment and selection unit. The comparison unit compares the real-time dynamic load q. 动本 Greater than the rated q G When the second selection signal is output, it is sent to the fifth and sixth decision selection units. The fifth selection unit responds to the second selection signal and determines q. 动 Is it greater than or equal to 1.05q? G or less than 1.1q G After determining q 动 Greater than or equal to 1.05q G At that time, the selected dynamic acceleration value a 动 The value is 0.95a; The sixth selection unit responds to the second selection signal and determines q. 动 Is it greater than 1.1q? G After determining q 动 Greater than 1.1q G At that time, the selected dynamic acceleration value a 动 The value is 0.9a.

4. The belt conveyor group conveying system based on dynamic coal quantity data as described in claim 3, characterized in that: The comparison module also includes an output unit, which is used to output the corresponding dynamic acceleration value 'a' selected by the first, second, third, fourth, fifth, and sixth judgment selection units. 动 Provided to variable frequency speed control drive devices.

5. The belt conveyor group conveying system based on dynamic coal quantity data as described in claim 3, characterized in that: The dynamic acceleration value a selected above 动 The acceleration is divided into four levels: 0.95a (negative small PS), 0.9a and 1.03a (negative large PB), 1.11a (positive small NS), and 1.25a and 1.5a (positive large NB). The comparison module also includes an acceleration level adjustment unit, which adjusts the calculated required acceleration level for each level of the belt conveyor according to a predetermined rule to obtain the adjusted acceleration level. Then, the variable frequency drive outputs an acceleration curve based on the adjusted acceleration level. The predetermined rule is that the acceleration level of the current level of the belt conveyor must be lower than the acceleration level of the adjacent lower-level belt conveyor. The comparison module also includes an output unit, which selects the corresponding dynamic acceleration value 'a' based on the acceleration level adjusted by the acceleration level adjustment unit. 动 and the selected dynamic acceleration value a 动 Provided to variable frequency speed control drive devices.

6. A belt conveyor group conveying method based on dynamic coal quantity data, applicable to a belt conveyor group containing at least two belt conveyors, wherein the first belt conveyor receiving coal is the current-level belt conveyor, and the subsequent belt conveyors receiving coal are the next-level belt conveyors, comprising the following steps: A coal weight detection device, a coal volume detection device, and a speed detection device are installed on this stage of the belt conveyor. The coal weight detection device is used to detect the dynamic weight information q of the coal conveyed on this stage of the belt conveyor. 实本 The dynamic volume information of the coal conveyed on the current-stage belt conveyor is detected using a coal volume detection device, and the conveying speed information (v) on the current-stage belt conveyor is detected using a speed detection device. 实本 ; A coal volume detection device and a speed detection device are installed on the lower-level belt conveyor. The coal volume detection device detects the dynamic volume information of the coal conveyed on the lower-level belt conveyor, and the speed detection device detects the conveying speed information v on the lower-level belt conveyor. 实下 ; Based on the detected current dynamic load q of the coal accumulated on this level of the belt conveyor. 实本 The bulk density of the coal is calculated from the dynamic volume information at this level. Based on the detected dynamic volume information of the coal on the lower-level belt conveyor and the bulk density, the current dynamic load q of the coal arriving at the lower-level belt conveyor is calculated. 实下 ; Calculate the real-time dynamic load q on the belt of this level of belt conveyor using Formula 1. 动本 , q 动本 = q 实本 *v 实本 - q 实下 *v 实下 Formula 1; Store the current dynamic load q before shutdown. 实下 Real-time dynamic load q 动本 ; Before startup, obtain the stored current dynamic load q. 实下 Real-time dynamic load q 动本 The real-time dynamic load q 动本 With the rated q of this level of belt conveyor G Compare the real-time dynamic load q. 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 To control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor gradually accelerates from a stationary state to the rated belt speed; and to compare the real-time dynamic load q 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 This is used to control the output acceleration curve of the variable frequency speed control drive device, so that the belt conveyor can gradually accelerate from a stationary state to the rated belt speed.

7. The belt conveyor group conveying method based on dynamic coal quantity data as described in claim 6, characterized in that: "Compare the real-time dynamic load q" 动本 Less than the rated q G When selecting a dynamic acceleration value a that is greater than the originally set acceleration value a, choose a value greater than the original acceleration value a. 动 To control the operation of the variable frequency speed control drive device, so as to adjust the acceleration and dynamic acceleration value a of the belt conveyor at startup. 动 The corresponding steps are as follows: First, compare the real-time dynamic load q... 动本 Less than the rated q G When, determine q 动 Is it greater than or equal to 0.8q? G And less than 0.95q G q 动 Is it greater than or equal to 0.6q? G And less than 0.8q G q 动 Is it greater than or equal to 0.2q? G And less than 0.6q G q 动 Is it less than 0.2q? G ; After determining q 动 Greater than or equal to 0.8q G And less than 0.95q G At that time, the selected dynamic acceleration value a 动 The value is 1.03a; After determining q 动 Greater than or equal to 0.6q G And less than 0.8q G At that time, the selected dynamic acceleration value a 动 The value is 1.11a; After determining q 动 Greater than or equal to 0.2q G And less than 0.6q G At that time, the selected dynamic acceleration value a 动 The value is 1.25a; After determining q 动 Less than 0.2q G At that time, the selected dynamic acceleration value a 动 The value is 1.5a.

8. The belt conveyor group conveying method based on dynamic coal quantity data as described in claim 6, characterized in that: "Compare the real-time dynamic load q" 动本 Greater than the rated q G When selecting a dynamic acceleration value a that is less than the originally set acceleration value a, choose a value that is equal to or less than the original acceleration value a. 动 To control the operation of the variable frequency speed control drive device, so as to adjust the acceleration and dynamic acceleration value a of the belt conveyor at startup. 动 The corresponding steps are as follows: First, compare the real-time dynamic load q... 动本 Greater than the rated q G When, determine q 动 Is it greater than or equal to 1.05q? G And less than 1.1q G q 动 Is it greater than 1.1q? G ; After determining q 动 Greater than or equal to 1.05q G At that time, the selected dynamic acceleration value a 动 The value is 0.95a; After determining q 动 Greater than 1.1q G At that time, the selected dynamic acceleration value a 动 The value is 0.9a.

9. The belt conveyor group conveying method based on dynamic coal quantity data as described in claim 7 or 8, characterized in that: The belt conveyor group consists of four stages of belt conveyors, which will carry the selected dynamic acceleration value a. 动 The acceleration is divided into four levels: 0.95a (negative small PS), 0.9a and 1.03a (negative large PB), 1.11a (positive small NS), and 1.25a and 1.5a (positive large NB). The required acceleration level for each level of the belt conveyor is adjusted according to a predetermined rule to obtain the adjusted acceleration level. Then, the variable frequency drive is controlled to output the acceleration curve based on the adjusted acceleration level. The predetermined rule is that the acceleration level of the current level of the belt conveyor must be lower than the acceleration level of the next level of the belt conveyor adjacent to the current level.

Images