A coal mine working face transport equipment load monitoring and control system and working method

Abstract

The present invention discloses a load monitoring and control system and a working method for coal mine working face transportation equipment. The system includes a load diagnosis module, a parameter automatic revision module, a load intelligent control module, and a safety management and control module. The working method includes the following steps: S1, monitoring the working status of the equipment motor of each equipment through the load diagnosis module, and sending the monitoring results to the load intelligent control module and the safety management and control module for processing; S2, the parameter automatic revision module adjusts the set parameters in the load diagnosis module according to the manual judgment result; S3, the load intelligent control module monitors the operating status of the transfer machine in real time, and adjusts the working status of each equipment in combination with the equipment operating status information sent by the load intelligent control module; S4, the safety management and control module shuts down each equipment according to the equipment operating status information sent by the load diagnosis module.

Description

Technical Field

[0001] The present invention relates to the field of coal mines, and in particular to a load monitoring and control system for transport equipment on a coal mine working face and a working method. Background Art

[0002] Currently, load status monitoring of underground coal mine transportation equipment mostly relies on workers watching the current curve in the centralized control chute and using manual experience to determine equipment overload. When equipment overload is detected, all equipment on the working face will be stopped and the overloaded floating coal on the conveyor will be shoveled away with a shovel, thus solving the equipment overload problem. This monitoring method has low judgment accuracy, which affects the service life of the equipment and reduces the mining efficiency of the coal mine working face. In the context of intelligent mine construction, this load monitoring method and treatment solution will inevitably be eliminated. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned problems and provide a coal mine working face transportation equipment load monitoring and control system and working method that is simple to operate and provides safety protection for the equipment.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A load monitoring and control system for coal mine working face transportation equipment, the load monitoring and control system for coal mine working face transportation equipment including a load diagnosis module for judging the operating status of each device, a parameter automatic revision module for revising each parameter in the load diagnosis module, a load intelligent control module for adjusting the working status of each device, and a safety control module for processing equipment in an overload limit state; the signal input end of the load diagnosis module is connected to the signal output end of the parameter automatic revision module, and the signal output end of the load diagnosis module is respectively connected to the signal input ends of the load intelligent control module and the safety control module.

[0006] A working method of a coal mine working face transport equipment load monitoring and control system comprises the following steps:

[0007] S1. Monitor the working status of the device motor of each device through the load diagnosis module. When the working status of the device motor is detected to be in an overload state or underload state, the operating status information of the device is sent to the load intelligent control module for processing; when the working status of the device motor is detected to be in an overload limit state, the operating status information of the device is sent to the safety control module for processing;

[0008] S2. Manually judge the operating status information of each device monitored by the load diagnosis module. When the accuracy of the monitoring result of the load diagnosis module is lower than the set value, the parameter automatic revision module adjusts the set parameters in the load diagnosis module according to the manual judgment result;

[0009] S3. The load intelligent control module monitors the operating status of the transfer machine in real time and adjusts the working status of each device based on the device operating status information sent by the load intelligent control module;

[0010] S4. The safety control module shuts down each device according to the device operation status information sent by the load diagnosis module.

[0011] Furthermore, the step S1 specifically includes the following steps:

[0012] S11, real-time collection of instantaneous current and real-time temperature of the motors of each device;

[0013] S12, calculating the time-weighted average current value of the device motor current within 30 seconds;

[0014] S13. If the instantaneous current of the device motor is greater than or equal to 1.5 times the rated current of the motor, determine whether the following conditions are met: Condition 1: The real-time temperature of the device motor is greater than or equal to the second set temperature; Condition 2: The time-weighted average current value is greater than or equal to the third set current;

[0015] When condition one or condition two is met, the device is in an overload limit state, and the operating status information of the device is sent to the safety control module for processing;

[0016] When neither condition 1 nor condition 2 is met, the process proceeds to step S14 to determine whether the device is in an overload state;

[0017] S14. If the instantaneous current of the device motor is within a range of 1.1 to 1.5 times the rated current of the motor, determine whether the following conditions are met: Condition 1: The real-time temperature of the device motor is greater than or equal to a first set temperature; Condition 2: The time-weighted average current value is greater than or equal to the first set current;

[0018] When both condition 1 and condition 2 are met, the device is in an overload state, and the operating status information of the device is sent to the load intelligent control module for processing;

[0019] When conditions one and two cannot be met simultaneously, the device is in a normal state;

[0020] S15. If the instantaneous current of the device motor is within a range of 0.5 to 1.1 times the rated current of the motor, determine whether the following conditions are met: Condition 1: The real-time temperature of the device motor is greater than or equal to a first set temperature; Condition 2: The time-weighted average current value is greater than or equal to the first set current;

[0021] When both conditions 1 and 2 are met, the overload state of the equipment has gradually begun to adjust to a normal state;

[0022] When conditions one and two cannot be met simultaneously, the device is in a normal state;

[0023] S16. If the instantaneous current of the device motor is within the range of 0 to 0.5 times the rated current of the motor, determine whether the following conditions are met: Condition: The time-weighted average current value is less than or equal to the second set current;

[0024] When the conditions are met, the device is in an underload state, and the operating status information of the device is sent to the load intelligent control module for processing;

[0025] When the condition is not met, the device is in normal state.

[0026] Furthermore, in step S2, during the adjustment period of the set parameters in the load diagnosis module, the working status information of each device judged by the load diagnosis module is manually judged every 30 minutes, and the parameter automatic revision module calculates the judgment accuracy of the load diagnosis module. If the judgment accuracy is lower than 90%, the parameter automatic revision module adjusts the set parameters.

[0027] Furthermore, in step S2, the automatic parameter revision module adjusts the set parameters in the load diagnosis module according to the manual judgment result, specifically including the following steps:

[0028] S21: If the device is in a non-overload state and the load diagnosis module determines that it is in an overload state, the first set current value is increased by 2%; the first set temperature value is increased by 2%;

[0029] S22: If the device is in an overload state and the load diagnosis module does not determine the overload state, determine whether the device meets the following conditions: Condition 1: The time-weighted average current value is greater than or equal to the first set current; Condition 2: The real-time temperature of the device motor is greater than or equal to the first set temperature;

[0030] When both condition 1 and condition 2 are met, the first set current value is reduced by 1%, and the first set temperature value is reduced by 1%;

[0031] When only condition 1 is met, the first set temperature value is reduced by 1%;

[0032] When only condition 2 is met, the first set current value is reduced by 1%;

[0033] S23: If the device is in a non-underload state and the load diagnosis module determines that it is in an underload state, the second set current value is reduced by 2%;

[0034] S24: If the device is in an underload state and the load diagnosis module does not determine the underload state, the second set current value is increased by 1%;

[0035] S25: If the device is in an overload limit state and the load diagnosis module does not determine the overload limit state, the third set current value is reduced by 1%; the second set temperature value is reduced by 1%;

[0036] S26: If the device is in a non-overload limit state and the load diagnosis module determines that it is in an overload limit state, the third set current value is increased by 2%; and the second set temperature value is increased by 2%.

[0037] Furthermore, the step S3 specifically includes the following steps:

[0038] S31. The load intelligent control module monitors the operating status of the transfer machine in real time. When it is detected that the transfer machine is in an overloaded operating state, it analyzes and determines according to the following steps:

[0039] S311, determine whether the shearer is in the coal cutting state; if the shearer is in the coal cutting state, reduce the operating speed of the front scraper conveyor by 3%, and proceed to step S312; if the shearer is not in the coal cutting state, proceed to step S13;

[0040] S312, determining whether the front scraper conveyor is in a minimum speed operation state; if the front scraper conveyor is in the minimum speed operation state, reducing the operating speed of the shearer by 3%; if the front scraper conveyor is not in the minimum speed operation state, reducing the operating speed of the front scraper conveyor by 3%;

[0041] S313, determining whether the hydraulic support is in the coal-discharging state; if the hydraulic support is in the coal-discharging state, reducing the operating speed of the rear scraper conveyor by 3%, and proceeding to step S314; if the hydraulic support is not in the coal-discharging state, maintaining the coal-discharging state;

[0042] S314, determining whether the rear scraper conveyor is in the minimum speed operation state; if the rear scraper conveyor is in the minimum speed operation state, proceeding to step S315; if the rear scraper conveyor is not in the minimum speed operation state, reducing the operating speed of the rear scraper conveyor by 3%;

[0043] S315, determining whether the number of open coal caving ports on the working face is greater than one; if the number of open coal caving ports on the working face is greater than one, closing one of the coal caving ports; if the number of open coal caving ports on the working face is less than or equal to one, reducing the opening of the coal caving ports by 50%;

[0044] S32. When the load intelligent control module detects that the transfer machine is in normal operation, it analyzes and judges according to the following steps:

[0045] S321, determine whether the front scraper conveyor is in an overloaded state; if the front scraper conveyor is in an overloaded state, reduce the operating speed of the front scraper conveyor by 3%, and proceed to step 322; if the front scraper conveyor is not in a coal cutting state, proceed to step S323;

[0046] S322, determining whether the front scraper conveyor is in the minimum speed operation state; if the front scraper conveyor is in the minimum speed operation state, reducing the operating speed of the coal mining machine by 3%; if the front scraper conveyor is not in the minimum speed operation state, reducing the operating speed of the front scraper conveyor by 3%;

[0047] S323, determine whether the rear scraper conveyor is in an overloaded state; if the rear scraper conveyor is in an overloaded state, reduce the operating speed of the rear scraper conveyor by 3%, and enter step S324; if the rear scraper conveyor is not in an overloaded state, maintain the normal coal discharge state;

[0048] S324, determine whether the rear scraper conveyor is in the minimum speed operation state; when the rear scraper conveyor is in the minimum speed operation state, enter step S325; when the rear scraper conveyor is in the minimum speed operation state, reduce the operating speed of the rear scraper conveyor by 3%;

[0049] S325, determining whether the number of open coal caving ports on the working face is greater than one; if the number of open coal caving ports on the working face is greater than one, closing one of the coal caving ports; if the number of open coal caving ports on the working face is less than or equal to one, reducing the opening of the coal caving ports by 50%;

[0050] S33. When the load intelligent control module detects that the transfer machine is in an underloaded operating state, it analyzes and determines according to the following steps:

[0051] S331, determine whether the shearer is in the coal cutting state; if the shearer is in the coal cutting state, increase the operating speed of the front scraper conveyor by 3%, and proceed to step 332; if the shearer is not in the coal cutting state, proceed to step S333;

[0052] S332, determining whether the front scraper conveyor is in the maximum speed running state; if the front scraper conveyor is in the maximum speed running state, increasing the operating speed of the coal mining machine by 3%; if the front scraper conveyor is not in the maximum speed running state, increasing the operating speed of the front scraper conveyor by 3%;

[0053] S333, determining whether the hydraulic support is in the coal discharging state; if the hydraulic support is in the coal discharging state, increasing the operating speed of the rear scraper conveyor by 3%, and proceeding to step S334; if the hydraulic support is not in the coal discharging state, the coal discharging state remains stopped;

[0054] S334, determining whether the rear scraper conveyor is in the maximum speed running state; if the rear scraper conveyor is in the maximum speed running state, proceeding to step S335; if the rear scraper conveyor is not in the maximum speed running state, reducing the rear scraper conveyor running speed by 3%;

[0055] S335. Determine whether the number of open coal caving ports of the working face is less than 3; if the number of open coal caving ports of the working face is less than 3, open another coal caving port; if the number of open coal caving ports of the working face is greater than or equal to 3, the coal caving ports remain unchanged.

[0056] Furthermore, in step S4, when the load diagnosis module detects that the transfer machine is in an overloaded operating state, the safety management module shuts down the coal mining machine, the coal discharge port, the front scraper conveyor, and the rear scraper conveyor in sequence; when the load diagnosis module detects that the front scraper conveyor is in an overloaded operating state, the safety management module shuts down the coal mining machine and the front scraper conveyor in sequence; when the load diagnosis module detects that the rear scraper conveyor is in an overloaded operating state, the safety management module shuts down the coal discharge port and the rear scraper conveyor in sequence.

[0057] Compared with the prior art, the present invention has the following advantages and positive effects:

[0058] The present invention proposes a load monitoring and control system and working method for coal mine working face transportation equipment, which can effectively realize real-time monitoring and early warning of overload, normal and underload states of each equipment during transportation; at the same time, when the equipment is in overload or underload state, it can scientifically and effectively perform intelligent speed regulation and control, and when the equipment reaches the overload limit state, it will immediately brake and stop to protect the equipment and prevent equipment damage; it not only extends the service life of each transportation equipment, but also avoids the situation where frequent equipment shutdowns affect the mining efficiency of the coal mine working face, bringing convenience to coal mine mining work. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0060] Figure 1 This is the workflow diagram of the load diagnosis module;

[0061] Figure 2 This is the workflow diagram of the parameter automatic revision module;

[0062] Figure 3 This is the workflow diagram of the load intelligent control module;

[0063] Figure 4 This is the workflow diagram of the security control module. DETAILED DESCRIPTION

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the scope of protection of the present invention.

[0065] The present invention discloses a load monitoring and control system for coal mine working face transportation equipment. The system includes four major modules: a load diagnosis module, a parameter automatic revision module, a load intelligent control module, and a safety management and control module.

[0066] The workflow of the system includes the following steps:

[0067] S1. Monitor the working status of the device motor of each device through the load diagnosis module. When the working status of the device motor is detected to be in an overload state or underload state, the operating status information of the device is sent to the load intelligent control module for processing; when the working status of the device motor is detected to be in an overload limit state, the operating status information of the device is sent to the safety control module for processing;

[0068] S2. Manually judge the operating status information of each device monitored by the load diagnosis module. When the accuracy of the monitoring result of the load diagnosis module is lower than the set value, the parameter automatic revision module adjusts the set parameters in the load diagnosis module according to the manual judgment result;

[0069] S3. The load intelligent control module monitors the operating status of the transfer machine in real time and adjusts the working status of each device based on the device operating status information sent by the load intelligent control module;

[0070] S4. The safety control module shuts down each device according to the device operation status information sent by the load diagnosis module.

[0071] like Figure 1 As shown, the specific execution process of the load diagnosis module is as follows:

[0072] S21, real-time acquisition of the instantaneous current and real-time temperature of the equipment motor;

[0073] S22. Calculate the time-weighted average current of the device motor current in the past 30 seconds;

[0074] S23: If the instantaneous current is greater than or equal to 1.5 times the set point motor rated current, determine whether the following conditions are met: Condition ①: The real-time temperature is greater than or equal to the set temperature 2; Condition ②: The time-weighted current value is greater than or equal to the set current 3;

[0075] If either condition ① or condition ② is met, the device is considered to be in an overload limit state and needs to enter the "Safety Control Module" for processing.

[0076] If neither condition ① nor condition ② is met, the overload judgment process is entered (i.e., whether the condition in step S24 is met) and further judgment is required as to whether the device is in an overload state.

[0077] S24: If the instantaneous current is within the range of 1.1 times (inclusive) to 1.5 times the set point motor rated current, determine whether the following conditions are met: Condition 1: The real-time temperature is greater than or equal to the set temperature 1; Condition 2: The time-weighted current value is greater than or equal to the set current 1;

[0078] If both conditions ① and ② are met, the device is considered to be in an overload state, an early warning will be issued on the device interface, and the "Load Intelligent Control Module" will be entered for processing.

[0079] If conditions ① and ② cannot be met at the same time, the output device is in normal state and the device interface prompt is displayed.

[0080] S25: If the instantaneous current is in the range of 0.5 to 1.1 times the set point motor rated current, determine whether the following conditions are met: Condition 1: The real-time temperature is greater than or equal to the set temperature 1; Condition 2: The time-weighted current value is greater than or equal to the set current 1;

[0081] If both conditions ① and ② are met, the equipment is considered to be in a long-term operation and overload adjustment normal state. This state indicates that the overload state has gradually begun to adjust to the normal state.

[0082] If conditions ① and ② cannot be met at the same time, the output device is in normal state and the device interface prompt is displayed.

[0083] S26: If the instantaneous current is in the range of 0 current to 0.5 times (inclusive) the set point motor rated current, determine whether the following conditions are met. Condition: The time-weighted current value is less than or equal to the set current 2;

[0084] If the condition is satisfied, the device is considered to be underloaded, and an early warning is issued on the device interface. At the same time, the "load intelligent control module" is entered for processing.

[0085] If not satisfied, the device is considered to be in normal state and a device interface prompt is displayed.

[0086] like Figure 2 As shown, the specific execution process of the parameter automatic revision module is as follows:

[0087] S31. During the parameter determination period, technicians will assess the accuracy of the system's "overload limit," "overload," "normal," and "underload" statuses every 30 minutes. The system calculates the accuracy. If the accuracy falls below the set 90%, the system automatically adjusts the parameters based on the technician's calibration results.

[0088] S32. Adjust the parameters according to the judgment result of the technical personnel calibration;

[0089] Result 1: Not overloaded, but the system determines it is overloaded. Solution: ① Increase the set current 1 by 2%; ② Increase the set temperature 1 by 2%;

[0090] Result 2: Overload, the system does not determine it as overload. Solution: Calculate the time-weighted current value and real-time temperature of this result. 1) The time-weighted current value is greater than or equal to the set current 1; 2) The real-time temperature is greater than or equal to the set temperature 1;

[0091] ① If both 1) and 2) are met, reduce the set current 1 value by 1% and the set temperature 1 value by 1%;

[0092] ②If only 1) is met, the set temperature 1 value is reduced by 1%;

[0093] ③If only 2) is met, set the current 1 value to decrease by 1%;

[0094] Result 3: Not underloaded, but the system determines it is underloaded. Solution: Reduce the value of Current 2 by 2%.

[0095] Result 4: Underload. The system does not detect an underload. Solution: Increase the current 2 value by 1%.

[0096] Result 5: Overload limit, the system did not determine the overload limit. Solution: ① Reduce the set current 3 by 1%; ② Reduce the set temperature 2 by 1%;

[0097] Result 6: Not overloaded, but the system determines it is overloaded. Solution: ① Increase the set current 3 by 2%; ② Increase the set temperature 2 by 2%.

[0098] like Figure 3 As shown, the specific execution process of the load intelligent control module is as follows:

[0099] S31. The working surface operates normally, the load status of the transfer machine is monitored in real time, and the next step of analysis and judgment is carried out based on the various states of the transfer machine;

[0100] S32: The transfer machine is detected to be in state 1: the transfer machine is overloaded. The following process is required to determine:

[0101] Step 1: Determine whether the shearer is in the coal cutting state;

[0102] In the coal cutting state, instruction 1 is issued: reduce the operating speed of the front scraper conveyor by 3% and enter the second step.

[0103] Not in coal cutting state, go to the third step.

[0104] Step 2: Determine whether the front scraper conveyor is running at the minimum speed;

[0105] When running at minimum speed, execute instruction 2: reduce the speed of the coal mining machine by 3% until the speed drops to 0m / min.

[0106] If the machine is not running at the minimum speed, execute instruction 1: reduce the operating speed of the front scraper conveyor by 3%.

[0107] Step 3: Determine whether the hydraulic support is in the coal discharge state;

[0108] In the coal discharge state, instruction 3 is issued: the rear scraper conveyor slows down by 3% and enters the fourth step.

[0109] It is not in the coal discharging state and remains in the coal discharging stopped state.

[0110] Step 4: Check whether the rear scraper conveyor is running at the minimum speed;

[0111] If the minimum speed is met, proceed to step 5;

[0112] If the minimum speed is not met, execute instruction 3: slow down the rear scraper conveyor by 3%.

[0113] Step 5: Determine whether the number of open coal caving ports on the working face is greater than 1;

[0114] If the number of coal discharge ports is greater than 1, execute instruction 4: reduce the number of coal discharge ports by one.

[0115] If the number of coal discharge openings is less than or equal to 1, execute instruction 5: reduce the coal discharge opening by 50%.

[0116] S33: The transfer machine is detected to be in state 2: The transfer machine is operating normally. The following process should be used to determine:

[0117] Step 6: Determine whether the front scraper conveyor is overloaded;

[0118] In the overload state, the instruction 1 is issued: reduce the operating speed of the front scraper conveyor by 3% and enter the seventh step.

[0119] Not in coal cutting state, go to step 8.

[0120] Step 7: Determine whether the front scraper conveyor is running at the minimum speed;

[0121] When running at minimum speed, execute instruction 2: reduce the speed of the coal mining machine by 3% until the speed drops to 0m / min.

[0122] If the machine is not running at the minimum speed, execute instruction 1: reduce the operating speed of the front scraper conveyor by 3%.

[0123] Step 8: Determine whether the rear scraper conveyor is overloaded;

[0124] In overload state, instruction 3 is issued: the rear scraper conveyor slows down by 3% and enters step 9.

[0125] It is not in an overloaded state and remains in a normal coal discharge state.

[0126] Step 9: Check whether the rear scraper conveyor is running at the minimum speed;

[0127] If the minimum speed is met, proceed to step 10;

[0128] If the minimum speed is not met, execute instruction 3: slow down the rear scraper conveyor by 3%.

[0129] Step 10: Determine whether the number of open coal caving ports on the working face is greater than 1;

[0130] If the number of coal discharge ports is greater than 1, execute instruction 4: reduce the number of coal discharge ports by one.

[0131] If the number of coal discharge openings is less than or equal to 1, execute instruction 5: reduce the coal discharge opening by 50%.

[0132] S34: The transfer machine is detected to be in state 3: the transfer machine is underloaded. The following process is required to determine:

[0133] Step 11: Determine whether the shearer is in the coal cutting state;

[0134] In the coal cutting state, issue instruction 6: increase the operating speed of the front scraper conveyor by 3% and enter the twelfth step.

[0135] Not in the coal cutting state, go to step 13.

[0136] Step 12: Determine whether the front scraper conveyor is running at the maximum speed;

[0137] When running at maximum speed, execute instruction 7: increase the speed of the coal mining machine by 3% until the speed reaches the maximum.

[0138] If the machine is not running at the maximum speed, execute instruction 6: increase the operating speed of the front scraper conveyor by 3%.

[0139] Step 13: Determine whether the hydraulic support is in the coal discharge state;

[0140] In the coal discharge state, instruction 8 is issued: increase the speed of the rear scraper conveyor by 3% and enter the fourteenth step.

[0141] It is not in the coal discharging state and remains in the coal discharging stopped state.

[0142] Step 14: Check whether the rear scraper conveyor is running at the maximum speed;

[0143] When the maximum speed is met, proceed to step 15;

[0144] If the maximum speed is not met, execute instruction 8: slow down the rear scraper conveyor by 3%.

[0145] Step 15: Determine whether the number of open coal caving openings in the working face is less than 3;

[0146] If the number of coal discharge ports is less than 3, execute instruction 9: add one coal discharge port.

[0147] If the number of coal discharge ports is greater than or equal to 3, execute instruction 10: maintain the coal discharge status.

[0148] like Figure 4 As shown, the specific execution process of the security control module is shown in the following steps.

[0149] S41. To prevent various equipment from causing safety accidents and related safety hazards due to overload limit operation, the setting of safety precautions should be strengthened. Since different equipment has different sources of overload, different safety precautions should be set for various common equipment on the working face when they reach the overload limit;

[0150] S42. Safety control steps for transfer machine overload limit: In the event of transfer machine overload limit operation, the equipment should be shut down according to the following process;

[0151] Coal mining machine stops → coal discharge port is closed → front scraper conveyor stops → rear scraper conveyor stops.

[0152] S43. Safety control steps for overload limit of front scraper conveyor: When the front scraper conveyor is running at overload limit, the equipment should be shut down according to the following process;

[0153] Coal mining machine stops → front scraper conveyor stops.

[0154] S44. Safety control steps for rear scraper conveyor overload limit: When the rear scraper conveyor is operating at its overload limit, the equipment should be shut down according to the following process;

[0155] The coal discharge port is closed → the rear scraper conveyor stops.

[0156] The present invention proposes a load monitoring and control system and working method for coal mine working face transportation equipment, which can effectively realize real-time monitoring and early warning of overload, normal and underload states of each equipment during transportation; at the same time, when the equipment is in overload or underload state, it can scientifically and effectively perform intelligent speed regulation and control, and when the equipment reaches the overload limit state, it will immediately brake and stop to protect the equipment and prevent equipment damage; it not only extends the service life of each transportation equipment, but also avoids the situation where frequent equipment shutdowns affect the mining efficiency of the coal mine working face, bringing convenience to coal mine mining work.

Claims

1. A method for monitoring and controlling a load on transport equipment in a coal mine working face, characterized by: The following steps are involved: S1. Monitor the working status of the device motor of each device through the load diagnosis module. When the working status of the device motor is detected to be in an overload state or underload state, the operating status information of the device is sent to the load intelligent control module for processing; when the working status of the device motor is detected to be in an overload limit state, the operating status information of the device is sent to the safety control module for processing; S2. Manually judge the operating status information of each device monitored by the load diagnosis module. When the accuracy of the monitoring result of the load diagnosis module is lower than the set value, the parameter automatic revision module adjusts the set parameters in the load diagnosis module according to the manual judgment result; S3. The load intelligent control module monitors the operating status of the transfer machine in real time and adjusts the working status of each device based on the device operating status information sent by the load intelligent control module; S4. The safety control module shuts down each device based on the device operating status information sent by the load diagnosis module. The step S3 specifically includes the following steps: S31. The load intelligent control module monitors the operating status of the transfer machine in real time. When it is detected that the transfer machine is in an overloaded operating state, it analyzes and determines according to the following steps: S311, determine whether the shearer is in the coal cutting state; if the shearer is in the coal cutting state, reduce the operating speed of the front scraper conveyor by 3%, and proceed to step S312; if the shearer is not in the coal cutting state, proceed to step S13; S312, determining whether the front scraper conveyor is in a minimum speed operation state; if the front scraper conveyor is in the minimum speed operation state, reducing the operating speed of the shearer by 3%; if the front scraper conveyor is not in the minimum speed operation state, reducing the operating speed of the front scraper conveyor by 3%; S313, determining whether the hydraulic support is in the coal-discharging state; if the hydraulic support is in the coal-discharging state, reducing the operating speed of the rear scraper conveyor by 3%, and proceeding to step S314; if the hydraulic support is not in the coal-discharging state, maintaining the coal-discharging state; S314, determining whether the rear scraper conveyor is in the minimum speed operation state; if the rear scraper conveyor is in the minimum speed operation state, proceeding to step S315; if the rear scraper conveyor is not in the minimum speed operation state, reducing the operating speed of the rear scraper conveyor by 3%; S315, determining whether the number of open coal caving ports on the working face is greater than one; if the number of open coal caving ports on the working face is greater than one, closing one of the coal caving ports; if the number of open coal caving ports on the working face is less than or equal to one, reducing the opening of the coal caving ports by 50%; S32. When the load intelligent control module detects that the transfer machine is in normal operation, it analyzes and judges according to the following steps: S321, determine whether the front scraper conveyor is in an overloaded state; if the front scraper conveyor is in an overloaded state, reduce the operating speed of the front scraper conveyor by 3%, and proceed to step 322; if the front scraper conveyor is not in a coal cutting state, proceed to step S323; S322, determining whether the front scraper conveyor is in the minimum speed operation state; if the front scraper conveyor is in the minimum speed operation state, reducing the operating speed of the coal mining machine by 3%; if the front scraper conveyor is not in the minimum speed operation state, reducing the operating speed of the front scraper conveyor by 3%; S323, determine whether the rear scraper conveyor is in an overloaded state; if the rear scraper conveyor is in an overloaded state, reduce the operating speed of the rear scraper conveyor by 3%, and enter step S324; if the rear scraper conveyor is not in an overloaded state, maintain the normal coal discharge state; S324, determine whether the rear scraper conveyor is in the minimum speed operation state; when the rear scraper conveyor is in the minimum speed operation state, enter step S325; when the rear scraper conveyor is in the minimum speed operation state, reduce the operating speed of the rear scraper conveyor by 3%; S325, determining whether the number of open coal caving ports on the working face is greater than one; if the number of open coal caving ports on the working face is greater than one, closing one of the coal caving ports; if the number of open coal caving ports on the working face is less than or equal to one, reducing the opening of the coal caving ports by 50%; S33. When the load intelligent control module detects that the transfer machine is in an underloaded operating state, it analyzes and determines according to the following steps: S331, determine whether the shearer is in the coal cutting state; if the shearer is in the coal cutting state, increase the operating speed of the front scraper conveyor by 3%, and proceed to step 332; if the shearer is not in the coal cutting state, proceed to step S333; S332, determining whether the front scraper conveyor is in the maximum speed running state; if the front scraper conveyor is in the maximum speed running state, increasing the operating speed of the coal mining machine by 3%; if the front scraper conveyor is not in the maximum speed running state, increasing the operating speed of the front scraper conveyor by 3%; S333, determining whether the hydraulic support is in the coal discharging state; if the hydraulic support is in the coal discharging state, increasing the operating speed of the rear scraper conveyor by 3%, and proceeding to step S334; if the hydraulic support is not in the coal discharging state, the coal discharging state remains stopped; S334, determining whether the rear scraper conveyor is in the maximum speed running state; if the rear scraper conveyor is in the maximum speed running state, proceeding to step S335; if the rear scraper conveyor is not in the maximum speed running state, reducing the rear scraper conveyor running speed by 3%; S335. Determine whether the number of open coal caving ports of the working face is less than 3; if the number of open coal caving ports of the working face is less than 3, open another coal caving port; if the number of open coal caving ports of the working face is greater than or equal to 3, the coal caving ports remain unchanged.

2. The operating method of the coal mine working face transport equipment load monitoring and control system according to claim 1, characterized in that: The step S1 specifically includes the following steps: S11, real-time collection of instantaneous current and real-time temperature of the motors of each device; S12, calculating the time-weighted average current value of the device motor current within 30 seconds; S13. If the instantaneous current of the device motor is greater than or equal to 1.5 times the rated current of the motor, determine whether the following conditions are met: Condition 1: The real-time temperature of the device motor is greater than or equal to the second set temperature; Condition 2: The time-weighted average current value is greater than or equal to the third set current; When condition one or condition two is met, the device is in an overload limit state, and the operating status information of the device is sent to the safety control module for processing; When neither condition 1 nor condition 2 is met, the process proceeds to step S14 to determine whether the device is in an overload state; S14. If the instantaneous current of the device motor is within a range of 1.1 to 1.5 times the rated current of the motor, determine whether the following conditions are met: Condition 1: The real-time temperature of the device motor is greater than or equal to a first set temperature; Condition 2: The time-weighted average current value is greater than or equal to the first set current; When both condition 1 and condition 2 are met, the device is in an overload state, and the operating status information of the device is sent to the load intelligent control module for processing; When conditions one and two cannot be met simultaneously, the device is in a normal state; S15. If the instantaneous current of the device motor is within a range of 0.5 to 1.1 times the rated current of the motor, determine whether the following conditions are met: Condition 1: The real-time temperature of the device motor is greater than or equal to a first set temperature; Condition 2: The time-weighted average current value is greater than or equal to the first set current; When both conditions 1 and 2 are met, the overload state of the equipment has gradually begun to adjust to a normal state; When conditions one and two cannot be met simultaneously, the device is in a normal state; S16. If the instantaneous current of the device motor is within the range of 0 to 0.5 times the rated current of the motor, determine whether the following conditions are met: Condition: The time-weighted average current value is less than or equal to the second set current; When the conditions are met, the device is in an underload state, and the operating status information of the device is sent to the load intelligent control module for processing; When the condition is not met, the device is in normal state.

3. The operating method of the coal mine working face transport equipment load monitoring and control system according to claim 2, characterized in that: In step S2, during the adjustment period of the set parameters in the load diagnosis module, the working status information of each device determined by the load diagnosis module is manually determined every 30 minutes, and the parameter automatic revision module calculates the judgment accuracy of the load diagnosis module. If the judgment accuracy is lower than 90%, the parameter automatic revision module adjusts the set parameters.

4. The operating method of the coal mine working face transport equipment load monitoring and control system according to claim 3, characterized in that: In step S2, the automatic parameter revision module adjusts the set parameters in the load diagnosis module according to the manual judgment result, specifically including the following steps: S21: If the device is in a non-overload state and the load diagnosis module determines that it is in an overload state, the first set current value is increased by 2%; the first set temperature value is increased by 2%; S22: If the device is in an overload state and the load diagnosis module does not determine the overload state, determine whether the device meets the following conditions: Condition 1: The time-weighted average current value is greater than or equal to the first set current; Condition 2: The real-time temperature of the device motor is greater than or equal to the first set temperature; When both condition 1 and condition 2 are met, the first set current value is reduced by 1%, and the first set temperature value is reduced by 1%; When only condition 1 is met, the first set temperature value is reduced by 1%; When only condition 2 is met, the first set current value is reduced by 1%; S23: If the device is in a non-underload state and the load diagnosis module determines that it is in an underload state, the second set current value is reduced by 2%; S24: If the device is in an underload state and the load diagnosis module does not determine the underload state, the second set current value is increased by 1%; S25: If the device is in an overload limit state and the load diagnosis module does not determine the overload limit state, the third set current value is reduced by 1%; the second set temperature value is reduced by 1%; S26: If the device is in a non-overload limit state and the load diagnosis module determines that it is in an overload limit state, the third set current value is increased by 2%; and the second set temperature value is increased by 2%.

5. The working method of the coal mine working face transport equipment load monitoring and control system according to claim 1, characterized in that: In step S4, when the load diagnosis module detects that the transfer machine is in an overloaded operating state, the safety management module shuts down the coal mining machine, the coal discharge port, the front scraper conveyor, and the rear scraper conveyor in sequence; when the load diagnosis module detects that the front scraper conveyor is in an overloaded operating state, the safety management module shuts down the coal mining machine and the front scraper conveyor in sequence; when the load diagnosis module detects that the rear scraper conveyor is in an overloaded operating state, the safety management module shuts down the coal discharge port and the rear scraper conveyor in sequence.

6. A coal mine working face transport equipment load monitoring and control system used in the working method of the coal mine working face transport equipment load monitoring and control system according to any one of claims 1 to 5, characterized in that: The coal mine working face transportation equipment load monitoring and control system includes a load diagnosis module for judging the operating status of each device, a parameter automatic revision module for revising each parameter in the load diagnosis module, a load intelligent control module for adjusting the working status of each device, and a safety control module for processing equipment in an overload limit state; the signal input end of the load diagnosis module is connected to the signal output end of the parameter automatic revision module, and the signal output end of the load diagnosis module is respectively connected to the signal input ends of the load intelligent control module and the safety control module.

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