Intelligent environment monitoring and linkage protection system for electric room of rolling mill

Abstract

The application discloses a kind of intelligent environment monitoring and linkage protection system of rolling steel electrical room, it is related to intelligent environment monitoring technical field, including environmental parameter acquisition module, air conditioning control module, dust automatic removal module, drive alarm module and main control module.Environmental parameter acquisition module gathers ambient temperature, temperature in cabinet, dust concentration, intrusion signal and water level;Main control module issues instruction to execution module according to abnormal level.Temperature exceeds first threshold value, forced refrigeration is limited and frequency converter speed, exceeds second threshold value, full frequency refrigeration and early warning, exceeds third threshold value, emergency stop;Dust exceeds standard or reaches fixed time period, electromagnetic valve group drives nozzle array cabinet pulse purging;Invasion is verified by infrared and microwave double identification, first trigger starts ultrasonic wave drive, and multiple triggers are upgraded sound and light alarm.The application realizes multiple parameter monitoring and multiple execution mechanism hierarchical linkage disposal, prevents equipment overheating, eliminates dust hazard, prevents small animal invasion, reduces artificial inspection intensity.

Description

Technical Field

[0001] This invention relates to the field of intelligent environmental monitoring technology, and in particular to an intelligent environmental monitoring and linkage protection system for a steel rolling electrical room. Background Technology

[0002] In steel metallurgical enterprises, the electrical room is a critical location housing the core control equipment of the rolling mill production line. It contains numerous PLC control cabinets, frequency converters, DC speed controllers, and high and low voltage power distribution equipment. The environmental conditions of the electrical room directly affect the operational reliability and service life of this equipment.

[0003] Currently, the electrical rooms of rolling mills and other steel production units generally suffer from the following technical challenges: First, temperature and humidity control is lagging. Most existing electrical rooms use fixed-frequency air conditioners for temperature regulation, and the start and stop of these air conditioners rely on manual experience or simple thermostats, resulting in slow response times. When the rolling load changes abruptly or the ambient temperature rises sharply in summer, the temperature inside the control cabinet can rise rapidly in a short period, and the air conditioning system cannot keep up with the adjustment, leading to overheating of power devices, accelerated insulation aging, and in severe cases, equipment burnout.

[0004] Secondly, dust accumulation is difficult to clean. Metal dust and iron oxide particles generated in the steel rolling workshop enter the electrical room through ventilation openings and cable trenches, gradually accumulating on the surfaces of components inside the control cabinets. This dust buildup leads to blocked heat dissipation channels, increased contact resistance, and consequently, localized overheating or even short circuits. Current cleaning methods rely on manual, periodic power outages for cleaning, which is infrequent, inefficient, and disrupts production during cleaning.

[0005] Third, the threat of small animal intrusion is serious. The cable trenches in the electrical room are connected to the outside, and small animals such as rats and snakes can easily enter the room along the cable trenches, gnaw on the cable insulation or build nests between the busbars, causing phase-to-phase short circuits, grounding faults and unplanned trips, which have a great impact on the continuous production of the rolling mill.

[0006] Fourth, the monitoring systems operate independently and lack coordination. The existing temperature monitoring, air conditioning control, and security monitoring in the electrical room are all independent, with no information sharing. When an anomaly occurs, it cannot be automatically coordinated and handled, and still requires manual operation by on-duty personnel after discovery, resulting in poor timeliness.

[0007] In summary, existing technologies lack a comprehensive electrical room protection system that integrates real-time monitoring of multiple parameters, hierarchical intelligent judgment, and automatic linkage and handling of multiple actuators. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill.

[0009] To solve the above technical problems, the technical solution of the present invention is as follows: This invention provides an intelligent environmental monitoring and linkage protection system for a steel rolling electrical room, comprising: The environmental parameter acquisition module is used to collect multiple environmental parameters in the electrical room and control cabinet. The environmental parameters include at least ambient temperature, cabinet temperature, dust concentration, and intrusion signals. The air conditioning intelligent control module is connected to the air conditioner in the electrical room and is used to switch the operating mode and adjust the power of the air conditioner in the electrical room according to control commands. The automatic dust removal module is located on the top of the control cabinet and is used to perform compressed air pulse purging inside the control cabinet according to control commands. The expulsion alarm module, located in the electrical room, is used to perform ultrasonic expulsion of intrusion targets and issue audible and visual alarms according to control commands; The main control module is connected to the environmental parameter acquisition module, the air conditioning intelligent control module, the dust automatic removal module, and the alarm module. The main control module has a built-in hierarchical linkage control strategy. It determines the current anomaly level based on the environmental parameters collected by the environmental parameter acquisition module, and issues control commands to the corresponding execution module according to the anomaly level.

[0010] The beneficial effects of this invention are: (1) The present invention incorporates a three-level temperature linkage control strategy in the main control module. When the ambient temperature exceeds the first temperature threshold, the main control module simultaneously sends a forced cooling command to the air conditioning control module and a speed limit command to the inverter, thus suppressing the temperature rise in a coordinated manner from the two dimensions of "enhancing heat dissipation" and "reducing heat generation". When the temperature inside the cabinet continues to rise and exceeds the second temperature threshold, the inverter controller in the air conditioning control module switches the compressor motor to full-frequency operation to output the maximum cooling power, and triggers an early warning signal to remind maintenance personnel to pay attention. When the temperature inside the cabinet exceeds the third temperature threshold, the main control module directly triggers an emergency shutdown command to cut off the power supply circuit to prevent the power devices from burning out due to continuous overheating. The above three-level strategy realizes a progressive automatic linkage from early warning, forced cooling to emergency protection by uniformly scheduling the air conditioning control module and the inverter through the main control module. It can effectively suppress the temperature abnormality in the early stage without manual intervention, thus avoiding equipment failure caused by environmental overheating. (2) In this invention, the automatic dust removal module installs a compressed air nozzle array on the top of each control cabinet and configures a solenoid valve group corresponding to each nozzle. The solenoid valve group opens sequentially in a preset order, and each solenoid valve opens and closes after a preset pulse duration. The adjacent solenoid valves are spaced apart by a preset interval time, forming a pulse sequence that blows the cabinets one by one. Compared with continuous blowing, this pulse method can generate a high airflow impact force in an instant, effectively peeling off the dust adhering to the surface of the components, while avoiding damage to precision components caused by continuous high-pressure airflow. Moreover, the entire blowing process does not require power outages or manual entry into the cabinets, and can be completed automatically under normal equipment operation, greatly reducing the labor intensity of manual cleaning and the loss of power outages.

[0011] (3) The alarm module of this invention uses a combination of infrared detector and microwave detector to form a dual-detection module. It is only determined as a valid intrusion target when both detection principles are triggered at the same time, effectively filtering false alarm signals caused by airflow disturbance, temperature change, etc., and improving the accuracy of intrusion detection.

[0012] (4) The remote monitoring terminal in this invention is connected to the main control module through a communication network. Its data display module displays all environmental parameters in real time, such as ambient temperature, cabinet temperature, dust concentration, intrusion detection status, and water level information in the electrical room, as well as the operating status of each execution module. Maintenance personnel can fully grasp the operating status of the electrical room without having to conduct on-site inspections of each cabinet and each point. The parameter configuration module supports remote setting of various threshold parameters and timing cycles in the hierarchical linkage control strategy. The alarm recording module automatically records the time, type, level, and handling results of all alarm events and supports historical data query and export. The above functions transform the traditional manual timed inspection mode into a remote centralized monitoring and automatic recording mode, which significantly reduces the frequency and workload of on-site inspections by duty personnel. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill provided by the present invention. Detailed Implementation

[0015] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] Taking the main electrical room of a steel company's medium plate mill as an example, this electrical room contains 24 control cabinets, each equipped with a PLC controller, frequency converter, DC speed control device, and high and low voltage power distribution components. (See also...) Figure 1 This application provides an intelligent environmental monitoring and linkage protection system for a steel rolling electrical room, including an environmental parameter acquisition module, an intelligent air conditioning control module, an automatic dust removal module, a drive-away alarm module, a main control module, and a remote monitoring terminal.

[0017] Specifically, the environmental parameter acquisition module is used to collect multiple environmental parameters in the electrical room and control cabinet in real time, and transmit the collected data to the main control module. In this embodiment, the environmental parameter acquisition module includes the following sensor components: Temperature and humidity sensors: Four sensors are installed, positioned in the center of each of the four walls of the electrical room and near the air conditioning return vents, approximately 1.5 meters above the ground. These sensors collect ambient temperature and relative humidity data for the electrical room. The temperature measurement range is -20℃ to 80℃, with an accuracy of ±0.5℃; the humidity measurement range is 0 to 100%RH, with an accuracy of ±3%RH. Each sensor communicates with the main control module via an RS485 bus, with a data acquisition cycle of 5 seconds.

[0018] Cabinet internal temperature sensors: One sensor is installed in each of the 24 control cabinets, positioned near the power devices (such as IGBT modules and rectifier bridges) that generate the most heat in the upper part of the cabinet, approximately 30 mm from the surface of the components. These sensors are used to collect real-time temperature data from the inside of each control cabinet, with a measurement range of 0℃ to 150℃ and an accuracy of ±0.3℃. Each sensor connects to the analog input terminal of the main control module via a 4-20mA analog signal, with a data acquisition cycle of 2 seconds.

[0019] Dust concentration sensors: A total of three sensors are installed, two near the ventilation openings in the electrical room and one at the air inlet in the densely populated control cabinet area, at a height of approximately 1.0 meter above the ground. The dust concentration sensors are used to collect the mass concentration of suspended dust in the air, with a measurement range of 0–10 mg / m³ and a resolution of 0.001 mg / m³. Each dust concentration sensor communicates with the main control module via an RS485 bus, with a data acquisition cycle of 10 seconds.

[0020] Infrared intrusion detectors: Four detectors are installed, positioned above the door frames of the two entrances to the electrical room and at the entrances of the two cable tunnels. The detection angle covers the entire cross-section of the tunnel, with a detection distance of 12 meters. The infrared intrusion detectors detect changes in infrared radiation generated by moving targets within the tunnel. When a moving target is detected, an intrusion signal is generated and transmitted to the main control module.

[0021] Water level sensors: Two sensors are installed, one at a low-lying area on the electrical room floor (near the air conditioning condensate drain) and the other at the lowest point of the cable trench. The water level sensors detect the water level in the electrical room, with a measurement range of 0–500 mm and an accuracy of ±2 mm. The water level sensors are connected to the main control module via a 4-20mA analog signal, with a data acquisition cycle of 5 seconds.

[0022] The air conditioning intelligent control module is connected to the industrial cabinet air conditioner in the electrical room, and is used to switch the operating mode and adjust the cooling power of the air conditioner according to the control commands issued by the main control module. In this embodiment, the air conditioning control module includes a frequency converter, which is selected from the frequency converters matched with the air conditioning compressor motor, and its output terminal is connected to the air conditioning compressor motor. The frequency converter receives the frequency setting command issued by the main control module and adjusts the operating frequency of the compressor motor. When a forced cooling command is received, the frequency converter increases the operating frequency of the compressor motor to more than 80% of the rated frequency (50Hz), that is, not lower than 40Hz; when a maximum cooling power command is received, the frequency converter switches the compressor motor to the 50Hz full-frequency operating state and outputs the maximum cooling power.

[0023] Operational status feedback: The inverter controller feeds back the current operating frequency, compressor motor current, air conditioner return air temperature, and fault codes to the main control module in real time, with a feedback cycle of 2 seconds. The main control module dynamically adjusts the frequency setpoint based on the deviation between the return air temperature and the set target temperature, achieving closed-loop regulation of the cooling power.

[0024] Operating Mode Switching: The air conditioning intelligent control module supports switching between three operating modes: cooling mode, fan mode, and standby mode. During normal operation, the air conditioner is in cooling mode, and the inverter controller adjusts the cooling power according to the instructions of the main control module. When the ambient temperature is lower than the set lower limit, the main control module instructs the air conditioner to switch to fan mode to save energy. When the electrical room is unoccupied and the equipment is under maintenance due to power failure, the air conditioner switches to standby mode.

[0025] An automatic dust removal module is installed on the top of each control cabinet and is used to perform compressed air pulse purging inside the control cabinet according to the control commands of the main control module. In this embodiment, the automatic dust removal module includes: Compressed air nozzle array: One set of compressed air nozzles is installed on the top of each of the 24 control cabinets, with four nozzles installed on the top of each cabinet, evenly distributed along the length of the cabinet. The nozzles are fan-shaped stainless steel nozzles with a spray angle of 65°, spraying towards the surface of the internal components of the control cabinet. The nozzle outlet is approximately 150 mm from the surface of the internal components. The nozzles are connected to solenoid valve assemblies via stainless steel pipes. Each solenoid valve is connected to a corresponding nozzle. The control terminal of the solenoid valve assembly is connected to the main control module via a digital output module. The main control module controls the on / off state of each solenoid valve to achieve jogging of the nozzles. The response time of the solenoid valves is no more than 20 milliseconds, meeting the rapid opening and closing requirements of pulse purging.

[0026] The automatic dust removal module is connected to the existing compressed air network in the factory through stainless steel pipelines. A pressure reducing valve and filter are installed at the connection point to adjust the compressed air pressure to 0.4-0.6MPa and filter out oil and moisture to prevent secondary pollution of the components inside the cabinet during the purging process.

[0027] It should be noted that the main control module initiates pulse purging based on the following two trigger conditions: Firstly, when the dust concentration value collected by the dust concentration sensor exceeds the preset concentration threshold (set to 2.0 mg / m³ in this embodiment), the main control module immediately triggers pulse purging; Secondly, when the preset timed purging cycle is reached (set to 2:00 AM every Sunday in this embodiment), the main control module automatically triggers pulse purging.

[0028] The pulse purging process is as follows: the solenoid valves are opened sequentially according to the control cabinet numbers from 1 to 24. The opening duration of each solenoid valve is a preset pulse duration (set to 0.5 seconds in this embodiment), and the opening interval between adjacent solenoid valves is a preset interval time (set to 0.3 seconds in this embodiment), forming a pulse sequence of purging cabinet by cabinet and nozzle by nozzle. After all four nozzles of a single control cabinet have been purged, the purging of the next control cabinet is started after a 2-second interval. The purging cycle ends after all 24 control cabinets have been purged.

[0029] The de-escalation alarm module is located in the electrical room and is used for automatic detection, de-escalation, and alarm activation of intruding small animals. In this embodiment, the de-escalation alarm module includes: The dual-technology detection module consists of a combination of infrared and microwave detectors. Four microwave detectors are arranged in the same positions as the four infrared detectors. The output signals from both the infrared and microwave detectors are connected to the main control module. The main control module uses AND logic to perform dual verification of the two signals: only when both the infrared and microwave detectors trigger simultaneously within a preset time window (3 seconds in this embodiment) is it considered a valid intrusion target, and an intrusion confirmation signal is generated; if only a single detector triggers, it is considered an interference signal and no response is given. This dual-technology mechanism effectively filters out false infrared alarms caused by airflow disturbances and sudden temperature changes, as well as false microwave alarms caused by vibrations of metallic objects.

[0030] Ultrasonic repellers: A total of 6 units are installed, with 4 located on the inner wall of the electrical room and 2 near the cable trench entrance. The ultrasonic repellers emit frequencies ranging from 20kHz to 65kHz, with an effective repelling radius of 8 meters. The ultrasonic repellers operate in a frequency sweep mode, cyclically sweeping the frequency at a rate of 5kHz per second within the 20kHz–65kHz range to prevent small animals from adapting to a single frequency. The start and stop of the ultrasonic repellers are controlled by the main control module via relay outputs.

[0031] Two audible and visual alarms are installed, each in a prominent position above one of the two entrances to the electrical room. The sound pressure level of the alarms is no less than 110dB, the flashing frequency is 1-2Hz, and the protection rating is IP65. The alarms are controlled by the main control module via relay output and are activated only when the intrusion event escalates.

[0032] The main control module implements a two-level response to intrusion events. Level 1: When the dual-technology detection module first confirms the intrusion target, the main control module immediately activates the ultrasonic repeller, continuously emitting ultrasonic waves to drive away the small animal for 5 minutes. If the dual-technology detection module does not trigger again during this period, the ultrasonic repeller automatically shuts off after 5 minutes. Level 2: If the number of triggers by the dual-technology detection module exceeds a preset threshold (3 times in this embodiment) within a preset time window (30 minutes in this example), the main control module determines that the intrusion event has escalated (indicating that the ultrasonic repeller has failed to effectively drive away the target, or that there is a persistent intrusion). At this time, the main control module activates the audible and visual alarm to issue an alarm signal and simultaneously pushes alarm information to the remote monitoring terminal via Ethernet communication, notifying maintenance personnel to promptly inspect and handle the situation. The audible and visual alarm continues to operate until maintenance personnel confirm a reset via the remote monitoring terminal.

[0033] The main control module is responsible for receiving all sensor data, executing the hierarchical linkage control strategy, and issuing control commands to each execution module. The main control module includes a PLC controller. The PLC controller has a pre-stored hierarchical linkage control program, which includes the following control logic: Temperature-graded control: Level 1: When the ambient temperature exceeds the first temperature threshold (set to 45℃ in this embodiment), the PLC sends a forced cooling command to the air conditioning control module (setting the compressor operating frequency to no less than 40Hz), and simultaneously sends a speed limit command to each inverter in the electrical room via the Profinet network (limiting the inverter output frequency to 70% of the rated frequency), thus suppressing temperature rise in two ways: enhancing heat dissipation and reducing heat generation. Level 2: When the temperature inside any control cabinet exceeds the second temperature threshold (set to 55℃ in this embodiment), the PLC sends a maximum cooling power command to the air conditioning control module (setting the compressor operating frequency to 50Hz full-frequency operation), and simultaneously triggers a warning signal, displayed as a yellow warning icon on the remote monitoring terminal. Level 3: When the temperature inside any control cabinet exceeds the third temperature threshold (set to 65℃ in this embodiment), the PLC triggers an emergency stop command, disconnecting the circuit breaker of the corresponding control cabinet's main circuit via the digital output module, and simultaneously pushing a red emergency alarm message to the remote monitoring terminal.

[0034] Dust purging control: The PLC monitors the dust concentration sensor's collected values ​​in real time. When the concentration value exceeds the preset concentration threshold (2.0mg / m³), pulse purging is triggered immediately. At the same time, the PLC has a built-in real-time clock, which automatically triggers pulse purging when the preset timed purging time (2:00 AM every Sunday) is reached.

[0035] Water level control: The PLC monitors the water level sensor's collected values ​​in real time. When the water level exceeds the preset water level threshold (set to 100 mm in this embodiment), the drainage pump is started through the digital output module. When the water level drops back to below the safe water level (set to 30 mm in this embodiment), the drainage pump is stopped.

[0036] Intrusion Response Control: The PLC performs an AND logic judgment on the signals from the dual-detection module. Upon confirmation of intrusion, it executes the expulsion and alarm functions according to the aforementioned two-level response mechanism.

[0037] The remote monitoring terminal is located in the duty room outside the electrical room and is used for centralized monitoring and remote management of the electrical room's environmental parameters and system operating status. In this embodiment, the remote monitoring terminal includes: Data display module: Real-time display of sensor locations and current collected values, including the internal temperature of the 24 control cabinets, the ambient temperature and humidity of the electrical room, dust concentration at each measuring point, intrusion detection status (normal / repelling / alarm), and water level information. It also displays the current operating frequency of the air conditioner, compressor status, status of each solenoid valve, and drain pump status.

[0038] Parameter configuration module: Provides a human-machine interface for maintenance personnel to remotely set and modify various parameters in the hierarchical linkage control strategy, including: first temperature threshold, second temperature threshold, third temperature threshold, dust concentration threshold, timed purging cycle and time, pulse duration, pulse interval time, water level threshold, intrusion trigger count threshold, and time window, etc. Parameter modifications are transmitted to the PLC controller via Ethernet and take effect immediately.

[0039] Alarm logging module: Automatically records all alarm events and linked response actions. Records include: event time, event type (temperature exceedance / dust exceedance / intrusion / water level exceedance), anomaly level (early warning / alarm / emergency), trigger parameter value, automatically executed response actions, and execution results. Alarm records are stored in tabular format, supporting filtering and querying by time range, event type, and anomaly level. They can also be exported to Excel files, providing data support for equipment status trend analysis and preventative maintenance plan development.

[0040] In addition to the above embodiments, the present invention may have other implementation methods; all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A smart environmental monitoring and linkage protection system for a steel rolling electrical room, characterized in that, include: An environmental parameter acquisition module is used to collect multiple environmental parameters in the electrical room and control cabinet. These environmental parameters include at least ambient temperature, cabinet temperature, dust concentration, and intrusion signals. An intelligent air conditioning control module is connected to the air conditioner in the electrical room and is used to switch the operating mode and adjust the power of the air conditioner in the electrical room according to control commands. The automatic dust removal module is located on the top of the control cabinet and is used to perform compressed air pulse purging inside the control cabinet according to control commands. The expulsion alarm module, located in the electrical room, is used to perform ultrasonic expulsion of intrusion targets and issue audible and visual alarms according to control commands; The main control module is communicatively connected to the environmental parameter acquisition module, the air conditioning intelligent control module, the dust automatic removal module, and the deflection alarm module, respectively. The main control module has a built-in hierarchical linkage control strategy. It determines the current anomaly level based on the environmental parameters collected by the environmental parameter acquisition module, and issues control commands to the corresponding execution module according to the anomaly level.

2. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 1, characterized in that, The environmental parameter acquisition module includes: Temperature and humidity sensors are installed on the walls of the electrical room and in the return air area to collect the ambient temperature and relative humidity of the electrical room. Temperature sensors are installed inside each control cabinet to collect the internal temperature of each control cabinet. Dust concentration sensors are installed in the electrical room and at the air inlet of the control cabinet to collect the dust concentration value in the air; Infrared intrusion detectors are installed at the entrances and exits of the electrical room and at cable ducts to detect moving targets and generate the intrusion signal.

3. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 1, characterized in that, The main control module is also used for: When the ambient temperature exceeds the first temperature threshold, a forced cooling command is sent to the air conditioning intelligent control unit, and a speed limit command is sent to the electrical indoor frequency inverter. When the temperature inside the cabinet exceeds the second temperature threshold, a maximum cooling power command is sent to the air conditioning intelligent control unit, and an early warning signal is triggered. When the temperature inside the cabinet exceeds the third temperature threshold, an emergency stop command is triggered, cutting off the power supply circuit of the corresponding control cabinet. Wherein, the first temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the third temperature threshold.

4. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 3, characterized in that, The air conditioning intelligent control module includes a frequency converter, which is connected to the compressor motor of the air conditioner in the electrical room. When the forced cooling command is received, the frequency converter increases the operating frequency of the compressor motor to a preset ratio above the rated frequency; When the maximum cooling power command is received, the frequency converter switches the compressor motor to full-frequency operation. The frequency converter is also connected to the main control module to feed back the current operating frequency and air conditioner return air temperature to the main control module.

5. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 2, characterized in that, The automatic dust removal module includes: Compressed air nozzle arrays are installed on the top of each control cabinet, with each nozzle spraying towards the inside of the control cabinet; The solenoid valve assembly is connected one-to-one with the compressed air nozzle array and is used to control the on / off state of each nozzle; The control terminal of the solenoid valve assembly is connected to the main control module, and the automatic dust removal module is connected to the compressed air pipeline network of the plant through a pipeline. The main control module sends a pulse opening command to the solenoid valve group based on the dust concentration value collected by the dust concentration sensor or a preset time period, so that the compressed air nozzle array blows and removes dust from the inside of the control cabinet in a pulse manner.

6. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 5, characterized in that, The triggering conditions for the pulse purge include: When the dust concentration value collected by the dust concentration sensor exceeds the preset concentration threshold, the main control module immediately triggers the pulse purging; when the preset timed purging cycle is reached, the main control module automatically triggers the pulse purging. The pulse purging is performed as follows: the solenoid valve group is opened sequentially in a preset order, the opening duration of each solenoid valve is the preset pulse duration, and the opening interval between adjacent solenoid valves is a preset time interval.

7. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 1, characterized in that, The expulsion alarm module includes: Infrared detectors and microwave detectors are combined to form a dual-detection unit, which is placed at the entrance and exit of the electrical room and at the cable communication channel to perform dual verification detection of moving targets. An ultrasonic repellent is placed on the inner wall of the electrical room and near the entrance of the cable trench to emit ultrasonic waves of a preset frequency when an intrusion target is detected. The audible and visual alarm is installed in a prominent location outside the electrical room to issue audible and visual alarm signals when an intrusion incident escalates. The dual-detection unit, the ultrasonic drive, and the audible and visual alarm are respectively connected to the main control module.

8. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 1, characterized in that, The environmental parameter acquisition module also includes a water level sensor, which is arranged in low-lying areas of the electrical room floor and in the cable trench to detect the water level in the electrical room. When the water level detected by the water level sensor exceeds the preset water level threshold, the main control module sends a start command to the drainage pump to execute automatic drainage; when the water level falls back below the safe water level, the main control module sends a stop command to the drainage pump.

9. The intelligent environmental monitoring and linkage protection system for the electrical room of a steel rolling mill according to claim 1, characterized in that, The main control module is also communicatively connected to a remote monitoring terminal, which includes: The data display module is used to display the ambient temperature, cabinet temperature, dust concentration, intrusion detection status, and water level information of the electrical room in real time. The parameter configuration module is used to remotely set various threshold parameters and timing periods in the hierarchical linkage control strategy; The alarm logging module is used to automatically record the time, type, level, and handling results of all alarm events, and supports historical data query and export.

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