Coal mine underground centralized refrigeration control system

Abstract

The invention relates to the field of intelligent control, and discloses an underground coal mine centralized refrigeration control system which is characterized in that a temperature monitoring point is arranged at an outlet of a refrigeration conveying pipeline of each refrigeration device, a refrigeration starting threshold value is set as a refrigeration triggering rule, and data are collected and analyzed based on the triggering rule; the coal mine underground refrigeration effect is monitored in real time, the refrigeration effect is regulated and controlled by controlling and analyzing the screened temperature monitoring points with the poor refrigeration effect, the refrigeration execution process and the refrigeration effect analysis result are monitored and fed back in real time, and the result is displayed to a user through a control display in a visual graph mode. The temperature monitoring accuracy and real-time performance can be greatly improved, refrigeration can be comprehensively carried out, the refrigeration effect is more uniform, the problem of response lag can be solved, it is ensured that the refrigeration system can respond to temperature changes in time, therefore, intelligent control and adjustment of the refrigeration process are achieved, and the stability and reliability of the system are improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and more specifically to a centralized refrigeration control system for underground coal mines. Background Art

[0002] During the coal mining process, as the mining depth increases, the ground temperature gradually rises, causing the temperature in the mine to continue to rise. Therefore, it is very necessary to carry out refrigeration in the coal mine to maintain appropriate temperature and humidity. Although traditional mine ventilation can provide oxygen for underground workers and dilute the concentration of harmful gases underground, for high-temperature mines, ventilation alone can no longer completely solve the problem of high-temperature heat damage. Therefore, underground centralized refrigeration control systems came into being. Through sensors, controllers and other equipment, the underground temperature, humidity and other parameters are monitored in real time, and the operating status of the refrigeration unit and the flow rate of the refrigerant are automatically adjusted according to the set values ​​to achieve precise control and remote monitoring functions. Operators can view the operating status and various parameters of the underground refrigeration system in real time on the ground through computers or mobile devices, and perform remote operations and adjustments;

[0003] However, the above process still has the following disadvantages:

[0004] First, although the existing refrigeration system uses sensors and controllers for real-time monitoring, there may be a problem of response lag. At the same time, it lacks comprehensive refrigeration based on the regional characteristics of the mine, resulting in uneven refrigeration effect;

[0005] Second, existing refrigeration systems rely on manual intervention for control and adjustment, which is inefficient and error-prone. In addition, due to the lack of real-time monitoring and data analysis functions, it may be difficult to perform intelligent control and adjustment of refrigeration execution and refrigeration effects. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a centralized refrigeration control system for underground coal mines to solve the problems existing in the above-mentioned background technology.

[0007] The present invention provides the following technical solution: a centralized refrigeration control system for underground coal mines, comprising:

[0008] Temperature monitoring module: By setting a temperature monitoring point at the outlet of the refrigeration pipeline of each refrigeration equipment, the temperature of the coal mine is monitored in real time, and the refrigeration start threshold is set as the refrigeration trigger rule, and the refrigeration control instruction is generated according to the refrigeration trigger rule and transmitted to the data transmission module;

[0009] Data transmission module: used to transmit refrigeration control instructions and control refrigeration execution instructions. The refrigeration control instructions are transmitted to the controller of the underground refrigeration equipment through the mine ring network. After receiving the instructions, the controller will immediately start the refrigeration equipment;

[0010] Data acquisition module: used to collect the refrigeration data of the refrigeration equipment and the temperature data of each temperature monitoring point that reaches the refrigeration trigger rule, and transmit the collected refrigeration data and temperature data to the feature extraction module;

[0011] Feature extraction module: extracts features from temperature data, calculates the temperature deviation value of each temperature monitoring point, and transmits the temperature deviation value of each temperature monitoring point to the state analysis module;

[0012] State analysis module: By analyzing the temperature deviation value change between two adjacent monitoring points, the temperature difference coefficient is obtained, and the refrigeration effect of the coal mine is monitored in real time, and the analysis results are transmitted to the refrigeration control module;

[0013] Refrigeration control module: Analyzes the refrigeration data in the cold transport pipeline where the temperature monitoring point with poor refrigeration effect is located, calculates the refrigeration control coefficient, regulates the refrigeration effect, and transmits the control analysis results to the control monitoring module;

[0014] Control monitoring module: used to monitor the refrigeration effect and temperature changes during the refrigeration control process in real time, and feed back the monitoring results to the refrigeration control module and temperature monitoring module;

[0015] Result display module: The refrigeration execution process and refrigeration effect control analysis results are displayed to the user in the form of visual graphics through the control display.

[0016] Preferably, the temperature monitoring module is configured to monitor the temperature of each temperature monitoring point in real time by setting a temperature monitoring point and installing a temperature sensor at each key position, including the inlet and outlet of the cooling medium, the working face, the return air tunnel and the transport tunnel. According to the safety requirements of the coal mine, a reasonable temperature threshold is set as the refrigeration start threshold. When the temperature of a certain temperature monitoring point monitored reaches or exceeds the refrigeration start threshold, it will automatically trigger the generation of a refrigeration control instruction, and transmit the generated refrigeration control instruction to the controller. At the same time, a corresponding refrigeration start trigger delay time is set according to the position of each temperature monitoring point to determine whether the refrigeration is started in time. If not, the underground personnel are notified immediately.

[0017] Preferably, the data transmission module transmits the refrigeration control instruction to the controller of the underground refrigeration equipment through the wireless communication network. The controller starts the refrigeration equipment according to the refrigeration control instruction and feeds back the operating status of the refrigeration equipment to the control display in real time.

[0018] Preferably, the data acquisition module is used to monitor the startup of the refrigeration equipment. When the startup of the refrigeration equipment is detected, the refrigeration data of the refrigeration equipment is collected in real time through the built-in sensor of the refrigeration equipment, and the underground temperature data is collected in real time through the temperature sensors of each temperature monitoring point. The refrigeration data and temperature data are then transmitted to the ground data server through the mine ring network, and the operating status of the refrigeration equipment and the temperature change status during refrigeration are displayed on the control display. The refrigeration data includes the flow, pressure and temperature of cooling water.

[0019] Preferably, the feature extraction module extracts and analyzes the temperature deviation value ΔT of each temperature monitoring point during the operation time of the refrigeration equipment through feature extraction. i .

[0020] Preferably, the state analysis module monitors the refrigeration effect of each temperature monitoring point in the coal mine in real time by comprehensively analyzing the changes in the temperature deviation values ​​between adjacent temperature monitoring points, and determines whether the refrigeration effect is good, thereby further controlling the refrigeration effect;

[0021] The specific calculation formula of the temperature difference coefficient is: ΔT i Indicates the temperature deviation value of the i-th monitoring point, ΔT i-1 represents the temperature deviation value of the i-1th monitoring point, and n represents the total number of monitoring points;

[0022] By setting a temperature difference threshold θ, the temperature difference coefficient ΔC is compared with the temperature difference threshold θ to determine whether the cooling effect is good. If the temperature difference coefficient ΔC ≤ the temperature difference threshold θ, it indicates that the cooling effect of the temperature monitoring point is good, and the judgment result is transmitted to the control monitoring module to continue monitoring the cooling effect and temperature changes. If the temperature difference coefficient ΔC > the temperature difference threshold θ, it indicates that the cooling effect of the temperature monitoring point is poor, and the temperature monitoring points with poor cooling effect are screened out through the judgment result to continue the cooling control effect analysis.

[0023] Preferably, the refrigeration control module performs a comprehensive analysis by analyzing the water flow data and pressure data in the cold delivery pipeline at the screened temperature monitoring points with poor refrigeration effects, calibrates and regulates the refrigeration effect, and transmits the refrigeration control results to the result display module;

[0024] The specific calculation formula of the refrigeration control coefficient is: K i represents the refrigeration efficiency coefficient of the i-th temperature monitoring point, T i represents the actual temperature of the ith temperature monitoring point, T set Indicates the set temperature, P i represents the pressure in the cooling pipeline at the ith temperature monitoring point, Pavg Represents the average pressure in each cooling pipeline, V i represents the water flow in the cooling pipeline at the ith temperature monitoring point, c pw represents the specific heat capacity of water, ρ w represents the density of water, α represents the pressure coefficient;

[0025] By setting the refrigeration control factor R i It is compared with the preset cooling effect threshold λ, so as to control the cooling state of each temperature monitoring point with poor cooling effect. i > the preset cooling effect threshold λ, it indicates that the cooling effect of the temperature monitoring point is not good, and the cooling capacity needs to be increased and the operating parameters of the refrigeration equipment need to be optimized. i When the cooling effect is less than the preset cooling effect threshold λ, it indicates that the cooling effect is excessive and the cooling capacity needs to be reduced and the water flow and pressure need to be adjusted.

[0026] Preferably, the control monitoring module is used to monitor the refrigeration execution operation and the refrigeration effect control operation in real time. When it is monitored that the temperature of each temperature monitoring point is lower than the refrigeration start threshold, the refrigeration operation of the refrigeration equipment is stopped. When it is monitored that the temperature of each temperature monitoring point reaches the temperature threshold again, the monitoring result is fed back to the temperature monitoring module, and the refrigeration control is started again; when it is monitored that the refrigeration control coefficient of the temperature monitoring point is equal to the preset refrigeration effect threshold, an instruction to stop regulating the refrigeration effect is transmitted to the refrigeration control module.

[0027] Preferably, the result display module transmits the refrigeration execution process and refrigeration effect control analysis results to the control display, and the user can view the refrigeration process and refrigeration effect of different temperature monitoring points in real time through the control display, and connect the voice phone to the surface monitoring center, so that the user can have voice communication with the underground coal mine workers while viewing the control display.

[0028] Technical effects and advantages of the present invention:

[0029] The present invention sets a temperature monitoring point at the outlet of a refrigeration delivery pipeline of each refrigeration device through a temperature monitoring module, monitors the temperature of the coal mine in real time, sets a refrigeration start threshold as a refrigeration trigger rule, transmits refrigeration control instructions and refrigeration control execution instructions through a data transmission module, collects refrigeration data of the refrigeration device and temperature data of each temperature monitoring point through a data acquisition module, extracts features of the temperature data through a feature extraction module, calculates a temperature deviation value of each temperature monitoring point, analyzes a change in the temperature deviation value between two adjacent monitoring points through a state analysis module, obtains a temperature difference coefficient, monitors the refrigeration effect of the coal mine in real time, analyzes refrigeration data in a cold delivery pipeline where a temperature monitoring point with a poor refrigeration effect is located through a refrigeration control module, calculates a refrigeration control coefficient, and performs an analysis on the refrigeration effect. Regulation and control, through the control monitoring module, the refrigeration effect and temperature changes in the refrigeration control process are monitored in real time, and the monitoring results are fed back in real time. The refrigeration execution process and refrigeration effect control analysis results are displayed to the user in a visual graphical form through the result display module. By setting multiple temperature monitoring points and refrigeration trigger rules, the accuracy and real-time performance of temperature monitoring can be greatly improved, and refrigeration can be carried out comprehensively to make the refrigeration effect more uniform, and the problem of response lag can be solved to ensure that the refrigeration system can respond to temperature changes in a timely manner. Through the analysis and control of the data, areas with poor refrigeration effects can be identified, and targeted regulation can be carried out through the refrigeration control module to improve the refrigeration effect and reduce resource waste, thereby realizing intelligent control and regulation of the refrigeration process and improving the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a system structure block diagram of the present invention.

[0031] Figure 2 It is a flow chart of the system operation of the present invention.

[0032] Figure 3 It is a diagram of the method steps of the present invention. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The coal mine underground centralized refrigeration control system involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0034] like Figure 1 The embodiment shown provides a centralized refrigeration control system for underground coal mines, including:

[0035] Temperature monitoring module: By setting up multiple temperature monitoring points underground in the coal mine, the temperature underground in the coal mine is monitored in real time, and the refrigeration start threshold is set as the refrigeration trigger rule, and the refrigeration control instructions are generated according to the refrigeration trigger rule and transmitted to the data transmission module.

[0036] In this embodiment, the temperature monitoring module sets a temperature monitoring point and installs a temperature sensor at each key position, including the inlet and outlet of the cooling medium, the working face, the return air tunnel and the transport tunnel, to monitor the temperature of each temperature monitoring point in real time. According to the safety requirements of the coal mine, a reasonable temperature threshold is set as the refrigeration start threshold. When the temperature of a certain temperature monitoring point monitored reaches or exceeds the refrigeration start threshold, it will automatically trigger the generation of a refrigeration control instruction, and transmit the generated refrigeration control instruction to the controller. At the same time, the corresponding refrigeration start trigger delay time is set according to the position of each temperature monitoring point to determine whether the refrigeration is started in time. If not, the underground personnel are notified immediately.

[0037] It should be specifically explained that the setting of the refrigeration start threshold is to determine a reasonable temperature threshold according to the design safety requirements of the coal mine, and set the corresponding high temperature alarm threshold and refrigeration start threshold. If the temperature reaches the refrigeration start threshold, the corresponding refrigeration control is immediately started. If the temperature reaches the high temperature alarm threshold, a high temperature alarm notification is immediately issued, and the corresponding refrigeration control is started. The temperature sensor is connected to the data transmission interface to transmit the refrigeration control instruction.

[0038] The specific steps of the temperature trigger rule are as follows:

[0039] Step 1: Connect the temperature sensors of each temperature monitoring point to the controller respectively, and check the connection and signal transmission status between the temperature sensors of each temperature monitoring point and the controller;

[0040] Step 2: Set the refrigeration start threshold in the controller to determine whether the temperature value monitored by the temperature sensor of each temperature monitoring point exceeds the refrigeration start threshold. If the temperature value of a temperature monitoring point reaches the refrigeration start threshold, a refrigeration control instruction is immediately sent to the controller;

[0041] Step 3: According to the location of each temperature monitoring point, the appropriate refrigeration start trigger delay time is calculated and set through the artificial intelligence algorithm, and the delay time is adjusted according to the temperature monitoring situation of each temperature monitoring point;

[0042] Step 4: If the refrigeration control command is not issued within the delay time, the controller will immediately send out a corresponding alarm signal to notify the underground personnel to evacuate in time.

[0043] Data transmission module: used to transmit refrigeration control instructions and control refrigeration execution instructions. The refrigeration control instructions are transmitted to the controller of the underground refrigeration equipment through the mine ring network. After receiving the instructions, the controller will immediately start the refrigeration equipment.

[0044] In this embodiment, the data transmission module transmits the refrigeration control instruction to the controller of the underground refrigeration equipment through the wireless communication network. The controller starts the refrigeration equipment according to the refrigeration control instruction and feeds back the operating status of the refrigeration equipment to the control display in real time.

[0045] It should be specifically explained that the temperature sensors and controllers set at each temperature monitoring point are connected to the network, and the controller receives refrigeration control instructions and sends refrigeration execution instructions through the data transmission interface of the wireless communication network. When the controller receives the refrigeration control instruction, it will immediately generate a refrigeration execution instruction, and transmit the refrigeration execution instruction to the refrigeration equipment to activate the refrigeration equipment to start the refrigeration function. When the refrigeration process is executed, the cold air generated by the refrigeration equipment is transmitted through the pipeline system to the temperature monitoring point that reaches the refrigeration trigger rule. At the same time, after transmitting the refrigeration execution instruction, the controller will feedback the operating status of the refrigeration equipment to the control display, and record the temperature change data and equipment status data in real time.

[0046] Data acquisition module: used to collect the refrigeration data of the refrigeration equipment and the temperature data of each temperature monitoring point that reaches the refrigeration trigger rule, and transmit the collected refrigeration data and temperature data to the feature extraction module.

[0047] In this embodiment, the data acquisition module is used to monitor the startup of the refrigeration equipment. When the startup of the refrigeration equipment is detected, the refrigeration data of the refrigeration equipment is collected in real time through the built-in sensor of the refrigeration equipment, and the underground temperature data is collected in real time through the temperature sensors of each temperature monitoring point. The refrigeration data and temperature data are then transmitted to the ground data server through the mine ring network, and the operating status of the refrigeration equipment and the temperature change status during refrigeration are displayed on the control display. The refrigeration data includes the flow, pressure and temperature of cooling water.

[0048] It should be specifically explained that the start-up signal of the refrigeration equipment is continuously monitored through the data acquisition module. When the start-up signal of the refrigeration equipment is detected, the refrigeration data and temperature data are immediately collected. The collected refrigeration data and temperature data are transmitted to the ground data server through the mine ring network. The ground data server then pre-processes the received refrigeration data and temperature data, including data cleaning, data conversion, data standardization and data integration, and stores the pre-processed data in the database according to the data collection time. When collecting the temperature data of the temperature monitoring points during the refrigeration process, it is necessary to set a certain time interval on the temperature sensor of each temperature monitoring point to automatically record the temperature data, and the recorded temperature data are stored in the database according to the collection time point.

[0049] Feature extraction module: extracts features from temperature data, calculates the temperature deviation value of each temperature monitoring point, and transmits the temperature deviation value of each temperature monitoring point to the state analysis module.

[0050] In this embodiment, the feature extraction module extracts and analyzes the temperature deviation value ΔT of each temperature monitoring point during the operation time of the refrigeration equipment. i .

[0051] It should be specifically stated that the feature extraction module needs to calculate the average temperature of each monitoring point during the operation time of the refrigeration equipment and the temperature difference between two adjacent data collection time points, so as to comprehensively calculate the temperature deviation value of each temperature monitoring point;

[0052] The specific analysis steps for the temperature deviation value of each temperature monitoring point are as follows:

[0053] (1) Record the time points of temperature data collected by the temperature sensor at each temperature monitoring point as 1, 2, 3...m, and calculate the temperature difference Δt between the two data collection time points of each temperature monitoring point i =T i(j+1) -T ij , T i(j+1) represents the temperature value of the i-th temperature monitoring point at the j+1th time point, T ij Indicates the temperature value of the i-th temperature monitoring point at the j-th time point;

[0054] (2) Calculate the average temperature value of each temperature monitoring point during the entire refrigeration equipment operation time

[0055] (3) Comprehensively calculate the temperature deviation value of each temperature monitoring point

[0056] State analysis module: By analyzing the change in temperature deviation between two adjacent monitoring points, the temperature difference coefficient is obtained, and the refrigeration effect of the coal mine is monitored in real time. At the same time, the analysis results are transmitted to the refrigeration control module.

[0057] In this embodiment, the state analysis module monitors the refrigeration effect of each temperature monitoring point in the coal mine in real time by comprehensively analyzing the changes in the temperature deviation values ​​between adjacent temperature monitoring points, and determines whether the refrigeration effect is good, thereby further controlling the refrigeration effect;

[0058] The specific calculation formula of the temperature difference coefficient is: ΔT i Indicates the temperature deviation value of the i-th monitoring point, ΔT i-1 represents the temperature deviation value of the i-1th monitoring point, and n represents the total number of monitoring points;

[0059] By setting a temperature difference threshold θ, the temperature difference coefficient ΔC is compared with the temperature difference threshold θ to determine whether the cooling effect is good. If the temperature difference coefficient ΔC ≤ the temperature difference threshold θ, it indicates that the cooling effect of the temperature monitoring point is good, and the judgment result is transmitted to the control monitoring module to continue monitoring the cooling effect and temperature changes. If the temperature difference coefficient ΔC > the temperature difference threshold θ, it indicates that the cooling effect of the temperature monitoring point is poor, and the temperature monitoring points with poor cooling effect are screened out through the judgment result to continue the cooling control effect analysis.

[0060] Refrigeration control module: By analyzing the refrigeration data in the cold transport pipeline where the temperature monitoring point with poor refrigeration effect is located, and calculating the refrigeration control coefficient, the refrigeration effect is regulated and the control analysis results are transmitted to the control monitoring module.

[0061] In this embodiment, the refrigeration control module performs a comprehensive analysis by analyzing the water flow data and pressure data in the cold delivery pipeline at the screened temperature monitoring points with poor refrigeration effects, calibrates and regulates the refrigeration effect, and transmits the refrigeration control results to the result display module;

[0062] The specific calculation formula of the refrigeration control coefficient is: K i represents the refrigeration efficiency coefficient of the i-th temperature monitoring point, T i represents the actual temperature of the ith temperature monitoring point, T set Indicates the set temperature, P i represents the pressure in the cooling pipeline at the ith temperature monitoring point, P avg Represents the average pressure in each cooling pipeline, V i represents the water flow in the cooling pipeline at the ith temperature monitoring point, c pw represents the specific heat capacity of water, ρw represents the density of water, α represents the pressure coefficient;

[0063] By setting the refrigeration control factor R i It is compared with the preset cooling effect threshold λ, so as to control the cooling state of each temperature monitoring point with poor cooling effect. i > the preset cooling effect threshold λ, it indicates that the cooling effect of the temperature monitoring point is not good, and the cooling capacity needs to be increased and the operating parameters of the refrigeration equipment need to be optimized. i When the cooling effect is less than the preset cooling effect threshold λ, it indicates that the cooling effect is excessive and the cooling capacity needs to be reduced and the water flow and pressure need to be adjusted.

[0064] It should be specifically noted that the calculation formula for the refrigeration efficiency coefficient of the i-th temperature monitoring point is: m i represents the mass flow rate of the refrigerant at the ith temperature monitoring point, C p Represents the specific heat capacity of the refrigerant, T ib represents the temperature of the refrigerant at the evaporator inlet at the i-th temperature monitoring point, T iout represents the temperature of the refrigerant at the evaporator outlet at the i-th temperature monitoring point, and W represents the power consumed by the refrigeration system.

[0065] Control monitoring module: used to monitor the refrigeration effect and temperature changes during the refrigeration control process in real time, and feed back the monitoring results to the refrigeration control module and temperature monitoring module.

[0066] In this embodiment, the control monitoring module is used to monitor the refrigeration execution operation and the refrigeration effect control operation in real time. When it is monitored that the temperature of each temperature monitoring point is lower than the refrigeration start threshold, the refrigeration operation of the refrigeration equipment is stopped. When it is monitored that the temperature of each temperature monitoring point reaches the temperature threshold again, the monitoring result is fed back to the temperature monitoring module, and the refrigeration control is started again; when it is monitored that the refrigeration control coefficient of the temperature monitoring point is equal to the preset refrigeration effect threshold, an instruction to stop regulating the refrigeration effect is transmitted to the refrigeration control module.

[0067] Result display module: The refrigeration execution process and refrigeration effect control analysis results are displayed to the user in the form of visual graphics through the control display.

[0068] In this embodiment, the result display module transmits the refrigeration execution process and refrigeration effect control analysis results to the control display. The user can view the refrigeration process and refrigeration effect of different temperature monitoring points in real time through the control display, and connect the voice phone to the well monitoring center, so that the user can communicate with the underground coal mine workers by voice while viewing the control display.

[0069] like Figure 2 The embodiment shown provides an operation flow of a centralized refrigeration control system for an underground coal mine, including the following steps:

[0070] Step 1: Set the cooling start threshold as the cooling trigger rule to start the cooling function;

[0071] Step 2: The controller transmits the refrigeration control instruction and the refrigeration control execution instruction;

[0072] Step 3: Collect temperature data of each temperature monitoring point;

[0073] Step 4: Analyze and calculate the temperature difference coefficient to monitor the cooling effect of the coal mine in real time;

[0074] Step 5: Determine whether the cooling effect is good;

[0075] Step 6: Calculate the refrigeration control coefficient and adjust the refrigeration effect;

[0076] Step 7: Real-time monitoring of the refrigeration effect and temperature changes during the refrigeration control process;

[0077] Step 8: Provide feedback on cooling effect and temperature changes.

[0078] like Figure 3 The embodiment shown provides a centralized refrigeration control method for underground coal mines, comprising the following steps:

[0079] S1: By setting a temperature monitoring point at the outlet of the refrigeration delivery pipeline of each refrigeration equipment, the temperature of the coal mine is monitored in real time, and the refrigeration start threshold is set as the refrigeration trigger rule, and the refrigeration control instruction is generated according to the refrigeration trigger rule and transmitted to S2;

[0080] S2: The refrigeration control command is transmitted to the controller of the underground refrigeration equipment through the mine ring network. After receiving the command, the controller will immediately start the refrigeration equipment;

[0081] S3: Collect refrigeration data of refrigeration equipment and temperature data of each temperature monitoring point;

[0082] S4: extracting features from the temperature data and calculating the temperature deviation value of each temperature monitoring point;

[0083] S5: By analyzing the temperature deviation value change between two adjacent monitoring points, the temperature difference coefficient is obtained, and the refrigeration effect of the coal mine is monitored in real time;

[0084] S6: Analyze the refrigeration data in the cold transport pipeline where the temperature monitoring point with poor refrigeration effect is located, calculate the refrigeration control coefficient, and regulate the refrigeration effect;

[0085] S7: used to monitor the refrigeration effect and temperature changes during the refrigeration control process in real time;

[0086] S8: The refrigeration execution process and the refrigeration effect control analysis results are displayed to the user in a visual graphical form via a control display.

[0087] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0088] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. The centralized refrigeration control system for underground coal mines is characterized by: include: Temperature monitoring module: By setting a temperature monitoring point at the outlet of the refrigeration pipeline of each refrigeration equipment, the temperature of the coal mine is monitored in real time, and the refrigeration start threshold is set as the refrigeration trigger rule, and the refrigeration control instruction is generated according to the refrigeration trigger rule and transmitted to the data transmission module; Data transmission module: used to transmit refrigeration control instructions and control refrigeration execution instructions. The refrigeration control instructions are transmitted to the controller of the underground refrigeration equipment through the mine ring network. After receiving the instructions, the controller will immediately start the refrigeration equipment; Data acquisition module: used to collect the refrigeration data of the refrigeration equipment and the temperature data of each temperature monitoring point that reaches the refrigeration trigger rule, and transmit the collected refrigeration data and temperature data to the feature extraction module; Feature extraction module: extracts features from temperature data, calculates the temperature deviation value of each temperature monitoring point, and transmits the temperature deviation value of each temperature monitoring point to the state analysis module; State analysis module: By analyzing the temperature deviation value change between two adjacent monitoring points, the temperature difference coefficient is obtained, and the refrigeration effect of the coal mine is monitored in real time, and the analysis results are transmitted to the refrigeration control module; Refrigeration control module: Analyzes the refrigeration data in the cold transport pipeline where the temperature monitoring point with poor refrigeration effect is located, calculates the refrigeration control coefficient, regulates the refrigeration effect, and transmits the control analysis results to the control monitoring module; Control monitoring module: used to monitor the refrigeration effect and temperature changes during the refrigeration control process in real time, and feed back the monitoring results to the refrigeration control module and temperature monitoring module; Adjustment feedback module: The refrigeration execution process and refrigeration effect control analysis results are displayed to the user in the form of visual graphics through the control display.

2. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The temperature monitoring module is used to monitor the temperature of each temperature monitoring point in real time by setting a temperature monitoring point and installing a temperature sensor at each key position, including the inlet and outlet of the cooling medium, the working face, the return air tunnel and the transportation tunnel. According to the safety requirements of the coal mine, a reasonable temperature threshold is set as the refrigeration start threshold. When the temperature of a certain temperature monitoring point monitored reaches or exceeds the refrigeration start threshold, it will automatically trigger the generation of a refrigeration control instruction, and transmit the generated refrigeration control instruction to the controller. At the same time, according to the position of each temperature monitoring point, a corresponding refrigeration start trigger delay time is set to determine whether the refrigeration is started in time. If not, the underground personnel are notified immediately.

3. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The data transmission module transmits the refrigeration control instruction to the controller of the underground refrigeration equipment through the wireless communication network. The controller starts the refrigeration equipment according to the refrigeration control instruction and feeds back the operating status of the refrigeration equipment to the control display in real time.

4. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The data acquisition module is used to monitor the startup of the refrigeration equipment. When the startup of the refrigeration equipment is detected, the refrigeration data of the refrigeration equipment is collected in real time through the built-in sensor of the refrigeration equipment, and the underground temperature data is collected in real time through the temperature sensors of each temperature monitoring point. The refrigeration data and temperature data are then transmitted to the ground data server through the mine ring network, and the operating status of the refrigeration equipment and the temperature change status during refrigeration are displayed on the control display. The refrigeration data includes the flow, pressure and temperature of cooling water.

5. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The feature extraction module extracts and analyzes the temperature deviation value ΔT of each temperature monitoring point during the operation time of the refrigeration equipment through feature extraction and analysis. i .

6. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The state analysis module monitors the cooling effect of each temperature monitoring point in the coal mine in real time by comprehensively analyzing the changes in the temperature deviation values ​​between adjacent temperature monitoring points, and determines whether the cooling effect is good, thereby further controlling the cooling effect; The specific calculation formula of the temperature difference coefficient is: ΔT i Indicates the temperature deviation value of the i-th monitoring point, ΔT i-1 represents the temperature deviation value of the i-1th monitoring point, and n represents the total number of monitoring points; By setting a temperature difference threshold θ, the temperature difference coefficient ΔC is compared with the temperature difference threshold θ to determine whether the cooling effect is good. If the temperature difference coefficient ΔC ≤ the temperature difference threshold θ, it indicates that the cooling effect of the temperature monitoring point is good, and the judgment result is transmitted to the control monitoring module to continue monitoring the cooling effect and temperature changes. If the temperature difference coefficient ΔC > the temperature difference threshold θ, it indicates that the cooling effect of the temperature monitoring point is poor, and the temperature monitoring points with poor cooling effect are screened out through the judgment result to continue the cooling control effect analysis.

7. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The refrigeration control module performs a comprehensive analysis by analyzing the water flow data and pressure data in the cooling pipeline at the screened temperature monitoring points with poor refrigeration effects, calibrates and regulates the refrigeration effect, and transmits the refrigeration control results to the result display module; The specific calculation formula of the refrigeration control coefficient is: K i represents the refrigeration efficiency coefficient of the i-th temperature monitoring point, T i represents the actual temperature of the ith temperature monitoring point, T set Indicates the set temperature, P i represents the pressure in the cooling pipeline at the ith temperature monitoring point, P avg Represents the average pressure in each cooling pipeline, V i represents the water flow in the cooling pipeline at the ith temperature monitoring point, c pw represents the specific heat capacity of water, ρ w represents the density of water, α represents the pressure coefficient; By setting the refrigeration control factor R i It is compared with the preset cooling effect threshold λ, so as to control the cooling state of each temperature monitoring point with poor cooling effect. i > the preset cooling effect threshold λ, it indicates that the cooling effect of the temperature monitoring point is not good, and the cooling capacity needs to be increased and the operating parameters of the refrigeration equipment need to be optimized. i When the cooling effect is less than the preset cooling effect threshold λ, it indicates that the cooling effect is excessive and the cooling capacity needs to be reduced and the water flow and pressure need to be adjusted.

8. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The control monitoring module is used to monitor the refrigeration execution operation and the refrigeration effect control operation in real time. When it is monitored that the temperature of each temperature monitoring point is lower than the refrigeration start threshold, the refrigeration operation of the refrigeration equipment is stopped. When it is monitored that the temperature of each temperature monitoring point reaches the temperature threshold again, the monitoring result is fed back to the temperature monitoring module to start the refrigeration control again; when it is monitored that the refrigeration control coefficient of the temperature monitoring point is equal to the preset refrigeration effect threshold, an instruction to stop regulating the refrigeration effect is transmitted to the refrigeration control module.

9. The centralized refrigeration control system for underground coal mines according to claim 1, characterized in that: The result display module transmits the refrigeration execution process and refrigeration effect control analysis results to the control display. The user can view the refrigeration process and refrigeration effect of different temperature monitoring points in real time through the control display, and connect the voice phone to the well monitoring center, so that the user can communicate with the underground coal mine workers by voice while viewing the control display.

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