A control system and method for emergency chain shutdown of a water cooling system of a refining furnace

Abstract

The application discloses a control system and method for emergency accident chain shutdown of a water cooling system of a refining furnace, comprising: a data acquisition module for real-time monitoring of state parameters of cooling water in the water cooling system of the refining furnace; a control module for receiving monitoring data of the state parameters and being provided with chain judgment logic; the chain judgment logic is used for fault determination according to comparison results of real-time data of at least two of temperature parameters, flow parameters and pressure parameters and corresponding preset threshold values; an execution module in communication connection to a plurality of controlled devices of the refining furnace; the plurality of controlled devices comprise electrode control devices for cutting off heat sources, furnace cover control devices for moving away heated components and auxiliary system devices for stopping auxiliary processes; when the control module determines that an emergency fault of the water cooling system occurs according to the chain judgment logic, the control module sends chain instructions to the execution module to drive the plurality of controlled devices to perform cooperative emergency shutdown actions.

Description

Technical Field

[0001] This invention relates to the field of safety control technology for metallurgical industrial equipment, and in particular to a control system and method for emergency accident interlocking shutdown of a refining furnace water cooling system. Background Technology

[0002] The refining furnace is a core high-temperature smelting equipment in the smelting process of iron and steel and non-ferrous metals. During smelting operations, its key components such as electrodes and furnace covers generate a large amount of heat due to prolonged exposure to the high temperatures of electric arcs or the radiant heat of molten steel. To ensure continuous and safe operation of the equipment and prevent components from burning or deforming due to overheating, refining furnaces are generally equipped with a water-cooling system. This system uses forced circulation of cooling water to rapidly remove heat, maintaining the surface temperature of the equipment within a safe threshold. Therefore, the stable and reliable operation of the water-cooling system is directly related to the safe production, smooth process operation, and service life of the refining furnace.

[0003] Currently, the emergency protection mechanism for refining furnace water cooling systems commonly used in the industry typically relies on a basic automatic interlocking control system. The typical operating mode of this system is as follows: when sensors installed on the cooling water pipeline detect fault signals such as low cooling water flow, abnormal pressure, or excessive temperature, the control system automatically triggers two core interlocking protection actions: electrode lifting and high-voltage power supply system tripping. However, with the development of metallurgical production towards higher efficiency, larger scale, and greater intelligence, and with increasingly stringent national safety production standards, the aforementioned traditional emergency shutdown mechanism has revealed significant shortcomings:

[0004] The existing mechanism only achieves automatic disconnection of the "heat source" (electrodes) and "power supply" (high voltage), which is a local and isolated protection. For secondary disasters that may be caused by water cooling system failures, such as the high-temperature furnace cover deforming and burning through due to lack of water cooling, continuous argon blowing exacerbating molten steel splashing, and continuous feeding by the charging system leading to the expansion of the accident, the corresponding key operations—rotating and removing or raising the furnace cover, stopping the argon blowing system, and stopping the charging system—are not included in the automatic interlocking program. These operations rely entirely on manual identification and execution by on-site operators, failing to achieve "full-process, full-equipment" automated protection from the occurrence of a fault to complete risk isolation.

[0005] Because processes such as furnace cover installation, argon blowing, and material feeding rely on manual intervention, the entire process—from the onset of system malfunctions to operators identifying the anomaly, determining the nature of the fault, and rushing to multiple control stations to execute corresponding shutdown procedures—is extremely time-consuming. Practice shows that the average response time often exceeds 30 seconds. Under the harsh conditions of high temperature and high pressure in refining furnaces, this delay of tens of seconds can easily lead to the rapid spread of localized faults, causing irreversible burns to critical furnace components (such as copper tiles and furnace covers), severe process interruptions, and even safety accidents, resulting in significant economic losses and safety risks. Summary of the Invention

[0006] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a control system and method for emergency accident interlocking shutdown of the water cooling system of a refining furnace, so as to solve the problems mentioned in the background art.

[0007] The technical solution adopted by this invention to solve its technical problem is: a control system for emergency accident interlocking shutdown of a refining furnace water cooling system, comprising:

[0008] The data acquisition module is used to monitor the status parameters of the cooling water in the refining furnace water cooling system in real time. The status parameters include temperature parameters, flow rate parameters, and pressure parameters.

[0009] The control module is used to receive monitoring data of the status parameters and has a preset chain judgment logic; the chain judgment logic is used to determine the fault based on the comparison result of real-time data of at least two of the temperature parameters, flow parameters and pressure parameters with the corresponding preset thresholds.

[0010] The execution module is communicatively connected to multiple controlled devices of the refining furnace; the multiple controlled devices include an electrode control device for cutting off the heat source, a furnace cover control device for removing the heated components, and an auxiliary system device for stopping auxiliary processes;

[0011] When the control module determines that an emergency failure of the water cooling system has occurred based on the interlocking judgment logic, the control module sends an interlocking command to the execution module to drive the multiple controlled devices to perform coordinated emergency shutdown actions.

[0012] As a further improvement of the present invention: the data acquisition module includes a sensor group, which is installed at a key node of the cooling water circuit of the refining furnace cover, for real-time monitoring of the status parameters of the cooling water. The sensor group includes at least a first temperature sensor for acquiring the inlet water temperature, a second temperature sensor for acquiring the return water temperature, a flow sensor for acquiring the inlet or return water flow rate, and a pressure sensor for acquiring the cooling water system pressure.

[0013] As a further improvement of the present invention: the control module is used to receive and process the monitoring data transmitted by the sensor group; the control module is pre-set with interlocking judgment logic, which is used to judge the interlocking fault based on the real-time data of the inlet water temperature, return water temperature, flow rate and pressure, and based on preset logical conditions including temperature difference threshold, low flow rate threshold and high temperature threshold; the control module is communicatively connected to the actuators of multiple controlled devices.

[0014] As a further improvement of the present invention: the plurality of controlled devices include a high-voltage power supply system, an electrode lifting mechanism, a furnace cover moving mechanism, an argon blowing system, and a feeding system; when the interlocking judgment logic of the control module determines that any interlocking fault condition is met, the control module outputs an emergency stop control signal to the actuators of the high-voltage power supply system, the electrode lifting mechanism, the furnace cover moving mechanism, the argon blowing system, and the feeding system.

[0015] As a further improvement of the present invention: the chain judgment logic is triggered when any of the following conditions are met:

[0016] The absolute value of the difference between the inlet water temperature and the return water temperature is greater than the temperature difference threshold.

[0017] The flow rate value collected by the flow sensor is lower than the low flow rate threshold;

[0018] Either the inlet water temperature or the return water temperature is higher than the high temperature threshold.

[0019] A control method for emergency accident interlock shutdown of a refining furnace water cooling system, applied to any of the control systems described above, the method comprising the following steps:

[0020] Data acquisition steps: Real-time acquisition of monitoring data of multiple state parameters of cooling water in the refining furnace water cooling system, including temperature parameters, flow rate parameters and pressure parameters;

[0021] Judgment steps: Based on the preset chain judgment logic, the monitoring data of the multiple state parameters are fused and analyzed; the chain judgment logic includes comparing the real-time data of at least two of the temperature parameter, flow parameter and pressure parameter with the corresponding preset safety threshold, and comprehensively determining whether an emergency failure of the water cooling system has occurred based on the comparison results;

[0022] Execution steps: When a comprehensive judgment is made that an emergency failure of the water cooling system occurs, an interlocking control command is generated and sent to drive multiple controlled devices of the refining furnace to perform coordinated emergency shutdown actions; the multiple controlled devices include at least two of the following: a first type of device for cutting off the heat source, a second type of device for removing the heated components, and a third type of device for stopping auxiliary processes.

[0023] As a further improvement of the present invention, the data acquisition step includes: real-time acquisition of cooling water inlet temperature, return temperature, flow rate and pressure data by a sensor group installed at key nodes of the cooling water circuit of the refining furnace cover, and transmission of the acquired analog signals to the control module.

[0024] As a further improvement of the present invention: the judgment step includes: the control module receives and converts the analog signal through its analog input module to obtain the corresponding physical quantity data; calls the preset chain judgment logic to compare the real-time data of the inlet water temperature, return water temperature, flow rate and pressure with the preset temperature difference threshold, low flow rate threshold and high temperature threshold, and performs chain fault judgment according to the preset logic conditions.

[0025] As a further improvement of the present invention: the execution steps include: when the chain judgment logic determines that any chain fault condition is met, the control module outputs an emergency shutdown control signal to the actuators of the high-voltage power supply system, electrode lifting mechanism, furnace cover moving mechanism, argon blowing system and feeding system through its digital output module within one control scan cycle, triggering a coordinated shutdown action.

[0026] As a further improvement of the present invention, it also includes a status monitoring step: through data communication with the human-machine interface, monitoring data, interlocking fault alarm information and equipment status are displayed in real time, and control commands or parameter settings are received through the human-machine interface.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] This invention uses a data acquisition module to synchronously monitor multiple state parameters such as temperature, flow rate, and pressure in real time, and then the control module analyzes the data. This enables the system to identify various fault modes, ranging from decreased cooling efficiency to media leakage, far exceeding the limitations of single-parameter protection. The control module's scanning cycle replaces lengthy processes, significantly improving emergency response time, effectively curbing the escalation of accidents, and reducing the risk of equipment burnout. Simultaneously, logical judgments based on clearly preset thresholds replace vague human experience-based decisions, greatly improving the accuracy and consistency of fault diagnosis and handling actions, and eliminating hazards caused by misjudgments, omissions, or operational delays. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0030] Figure 2 This is a schematic diagram of the process framework of an embodiment of the present invention. Detailed Implementation

[0031] In order to clearly and completely understand the technical solution, the present invention will be further described in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0033] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0035] Embodiments of the present invention provide a control system for emergency accident interlocking shutdown of a refining furnace water cooling system, comprising:

[0036] The data acquisition module is used to monitor the status parameters of the cooling water in the refining furnace water cooling system in real time. The status parameters include temperature parameters, flow rate parameters, and pressure parameters.

[0037] The control module is used to receive monitoring data of the status parameters and has a preset chain judgment logic; the chain judgment logic is used to determine the fault based on the comparison result of real-time data of at least two of the temperature parameters, flow parameters and pressure parameters with the corresponding preset thresholds.

[0038] The execution module is communicatively connected to multiple controlled devices of the refining furnace; the multiple controlled devices include an electrode control device for cutting off the heat source, a furnace cover control device for removing the heated components, and an auxiliary system device for stopping auxiliary processes;

[0039] When the control module determines that an emergency failure of the water cooling system has occurred based on the interlocking judgment logic, the control module sends an interlocking command to the execution module to drive the multiple controlled devices to perform coordinated emergency shutdown actions.

[0040] This invention uses a data acquisition module to synchronously monitor multiple state parameters such as temperature, flow rate, and pressure in real time, and then the control module analyzes the data. This enables the system to identify various fault modes, ranging from decreased cooling efficiency to media leakage, far exceeding the limitations of single-parameter protection. The control module's scanning cycle replaces lengthy processes, significantly improving emergency response time, effectively curbing the escalation of accidents, and reducing the risk of equipment burnout. Simultaneously, logical judgments based on clearly preset thresholds replace vague human experience-based decisions, greatly improving the accuracy and consistency of fault diagnosis and handling actions, and eliminating hazards caused by misjudgments, omissions, or operational delays.

[0041] In one embodiment of the present invention, the data acquisition module includes a sensor group installed at key nodes in the cooling water circuit of the refining furnace cover. This sensor group is used to monitor the status parameters of the cooling water in real time. The sensor group includes at least a first temperature sensor for collecting the inlet water temperature, a second temperature sensor for collecting the return water temperature, a flow sensor for collecting the inlet or return water flow rate, and a pressure sensor for collecting the cooling water system pressure. Installing the sensor group at key nodes in the furnace cover cooling water circuit enables monitoring of the core cooling components most prone to overheating and at the highest risk. By configuring dual inlet and return water temperature sensors, the system can directly calculate the real-time temperature difference, which is the most direct dynamic indicator for evaluating heat exchange efficiency. Combined with the flow sensor monitoring the medium delivery volume and the pressure sensor monitoring the system's sealing and resistance, these three types of parameters constitute a comprehensive diagnostic matrix: an abnormally large temperature difference may indicate insufficient heat exchange; if accompanied by a decrease in flow rate and abnormal pressure, it can be highly likely to be a leak or blockage.

[0042] In one embodiment of the present invention, the control module is used to receive and process monitoring data transmitted from the sensor group; the control module has a pre-set interlocking judgment logic, used to perform interlocking fault judgment based on the real-time data of inlet water temperature, return water temperature, flow rate, and pressure, and based on preset logical conditions including temperature difference threshold, low flow rate threshold, and high temperature threshold; the control module is communicatively connected to the actuators of multiple controlled devices. By synchronously processing the four types of real-time data—inlet water temperature, return water temperature, flow rate, and pressure—and comprehensively judging based on preset logical conditions such as temperature difference threshold, low flow rate threshold, and high temperature threshold, the accuracy and reliability of fault identification are improved, avoiding the defects of single-parameter protection systems that are prone to false activation or failure to activate.

[0043] In one embodiment of the present invention, the plurality of controlled devices include a high-voltage power supply system, an electrode lifting mechanism, a furnace cover moving mechanism, an argon blowing system, and a feeding system. When the interlocking judgment logic of the control module determines that any interlocking fault condition is met, the control module outputs an emergency shutdown control signal to the actuators of the high-voltage power supply system, the electrode lifting mechanism, the furnace cover moving mechanism, the argon blowing system, and the feeding system. The high-voltage power supply system and the electrode lifting mechanism are responsible for cutting off the energy input; the furnace cover moving mechanism is responsible for removing the core heated components to prevent them from burning out; the shutdown of the argon blowing system and the feeding system aims to interrupt auxiliary processes that may exacerbate the accident, thus achieving accident isolation.

[0044] In one embodiment of the present invention, the logical condition in the chain judgment logic is that the chain is triggered when any of the following conditions are met:

[0045] The absolute value of the difference between the inlet water temperature and the return water temperature is greater than the temperature difference threshold.

[0046] The flow rate value collected by the flow sensor is lower than the low flow rate threshold;

[0047] Either the inlet water temperature or the return water temperature is higher than the high temperature threshold.

[0048] These three conditions together constitute a concise yet complete fault diagnosis set, capable of covering a continuous spectrum from early anomalies to severe accidents, ensuring comprehensive monitoring, avoiding computational delays or uncertainties that may arise from complex algorithms, and ensuring the absolutely reliable execution of decision-making logic in emergency situations.

[0049] A control method for emergency accident interlock shutdown of a refining furnace water cooling system, applied to any of the control systems described above, the method comprising the following steps:

[0050] Data acquisition steps: Real-time acquisition of monitoring data of multiple state parameters of cooling water in the refining furnace water cooling system, including temperature parameters, flow rate parameters and pressure parameters;

[0051] Judgment steps: Based on the preset chain judgment logic, the monitoring data of the multiple state parameters are fused and analyzed; the chain judgment logic includes comparing the real-time data of at least two of the temperature parameter, flow parameter and pressure parameter with the corresponding preset safety threshold, and comprehensively determining whether an emergency failure of the water cooling system has occurred based on the comparison results;

[0052] Execution steps: When a comprehensive judgment is made that an emergency failure of the water cooling system occurs, an interlocking control command is generated and sent to drive multiple controlled devices of the refining furnace to perform coordinated emergency shutdown actions; the multiple controlled devices include at least two of the following: a first type of device for cutting off the heat source, a second type of device for removing the heated components, and a third type of device for stopping auxiliary processes.

[0053] In one embodiment of the present invention, the data acquisition step includes: acquiring in real time the inlet water temperature, return water temperature, flow rate and pressure data of the cooling water through a sensor group installed at a key node of the cooling water circuit of the refining furnace cover, and transmitting the acquired analog signals to the control module.

[0054] In one embodiment of the present invention, the judgment step includes: the control module receives and converts the analog signal through its analog input module to obtain the corresponding physical quantity data; calls the preset chain judgment logic to compare the real-time data of the inlet water temperature, return water temperature, flow rate and pressure with the preset temperature difference threshold, low flow rate threshold and high temperature threshold, and performs chain fault judgment according to the preset logic conditions.

[0055] In one embodiment of the present invention, the execution steps include: when the chain judgment logic determines that any chain fault condition is met, the control module outputs an emergency shutdown control signal to the actuators of the high-voltage power supply system, electrode lifting mechanism, furnace cover moving mechanism, argon blowing system and feeding system through its digital output module within one control scan cycle, triggering a coordinated shutdown action.

[0056] In one embodiment of the present invention, a status monitoring step is further included: through data communication with the human-machine interface, monitoring data, cascading fault alarm information and equipment status are displayed in real time, and control commands or parameter settings are received through the human-machine interface.

[0057] In one embodiment, the present invention provides a control system for emergency accident interlocking shutdown of a refining furnace water cooling system, including current identification, detection and acquisition components, a new human-machine interface and interlocking shutdown conditions, triggering equipment actions and interlocking components;

[0058] The current identification, detection and acquisition function includes a detection sensor component and a detection signal connection unit, which is mainly used to identify 4-20mA analog signals and realize the function of acquiring cooling water flow rate, pressure and temperature.

[0059] The newly added human-machine interface and interlocking shutdown conditions include a new block button on the existing human-machine interface, and the inclusion of permission windows, flow rate, and temperature alarm functions. Then, comprehensive interlocking shutdown conditions are implemented, including interlocking when the temperature difference between the furnace cover inlet and return water exceeds 20°C, when the flow rate of the furnace cover inlet and return water is below 135 m³ / h, when the flow rate of the furnace cover inlet and return water is below 135 m³ / h, and when the temperature of the furnace cover inlet and return water exceeds 55°C.

[0060] The automatic interlocking functions of the triggering device and interlocking parts include triggering the high-voltage system to trip, the electrode equipment to lift, the furnace cover equipment to rise, the feeding system to stop, and the argon blowing system to stop.

[0061] On the other hand, this embodiment also provides a control method for emergency accident interlocking shutdown of a refining furnace water cooling system, including the following steps:

[0062] Step 1: Using the current identification detection and module acquisition functions, connect the signal cables of the temperature, flow, and pressure sensors installed in the pipeline to the PLC analog module. Based on the calibration range of the temperature, flow, and pressure sensors, calibrate the upper and lower limits of the 4-20mA code value in the program.

[0063] Step 2: Based on actual conditions, add a new human-machine interface and interlocking shutdown conditions. Optimize the existing human-machine interface by adding a user permission window, flow difference, temperature difference, a shield button, and early warning prompts. Write interlocking program points for when the inlet and outlet water temperature difference is greater than 20℃, the flow rate is less than 135 m³ / h, and the inlet and outlet water temperatures are greater than 55℃.

[0064] Step 3: The PLC program controls and triggers the actions of the equipment and interlocking parts. The PLC program summarizes the actions of each interlocking point. When the conditions are met, the associated equipment can simultaneously shut down, achieving automatic triggering of interlocking shutdowns of electrodes, furnace covers, argon blowing systems, feeding conveyors, and other equipment, as well as lifting operations.

[0065] In summary, after reading this invention document, those skilled in the art can make various other corresponding modifications to the technical solutions and concepts based on this invention without creative mental effort, and all of these modifications fall within the scope of protection of this invention.

Claims

1. A control system for emergency accident interlocking shutdown of a refining furnace water cooling system, characterized in that, include: The data acquisition module is used to monitor the status parameters of the cooling water in the refining furnace water cooling system in real time. The status parameters include temperature parameters, flow rate parameters, and pressure parameters. The control module is used to receive monitoring data of the status parameters and has a preset chain judgment logic; the chain judgment logic is used to determine the fault based on the comparison result of real-time data of at least two of the temperature parameters, flow parameters and pressure parameters with the corresponding preset thresholds. The execution module is communicatively connected to multiple controlled devices in the refining furnace; The plurality of controlled devices include electrode control devices for cutting off the heat source, furnace cover control devices for removing heated components, and auxiliary system devices for stopping auxiliary processes; When the control module determines that an emergency failure of the water cooling system has occurred based on the interlocking judgment logic, the control module sends an interlocking command to the execution module to drive the multiple controlled devices to perform coordinated emergency shutdown actions.

2. The control system for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 1, characterized in that, The data acquisition module includes a sensor group installed at key nodes in the cooling water circuit of the refining furnace cover to monitor the status parameters of the cooling water in real time. The sensor group includes at least a first temperature sensor for acquiring the inlet water temperature, a second temperature sensor for acquiring the return water temperature, a flow sensor for acquiring the inlet or return water flow rate, and a pressure sensor for acquiring the cooling water system pressure.

3. The control system for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 2, characterized in that, The control module is used to receive and process the monitoring data transmitted by the sensor group; the control module has a pre-set interlocking judgment logic, which is used to judge the interlocking fault based on the real-time data of the inlet water temperature, return water temperature, flow rate and pressure, and based on preset logical conditions including temperature difference threshold, low flow rate threshold and high temperature threshold; the control module is communicatively connected to the actuators of multiple controlled devices.

4. The control system for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 3, characterized in that, The multiple controlled devices include a high-voltage power supply system, an electrode lifting mechanism, a furnace cover moving mechanism, an argon blowing system, and a material feeding system; when the interlocking judgment logic of the control module determines that any interlocking fault condition is met, the control module outputs an emergency stop control signal to the actuators of the high-voltage power supply system, the electrode lifting mechanism, the furnace cover moving mechanism, the argon blowing system, and the material feeding system.

5. The control system for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 4, characterized in that, The chain reaction logic is triggered when any of the following conditions are met: The absolute value of the difference between the inlet water temperature and the return water temperature is greater than the temperature difference threshold. The flow rate value collected by the flow sensor is lower than the low flow rate threshold; Either the inlet water temperature or the return water temperature is higher than the high temperature threshold.

6. A control method for emergency accident interlock shutdown of a refining furnace water cooling system, applied to the control system described in any one of claims 1-5, the method comprising the following steps: Data acquisition steps: Real-time acquisition of monitoring data of multiple state parameters of cooling water in the refining furnace water cooling system, including temperature parameters, flow rate parameters and pressure parameters; Judgment steps: Based on the preset chain judgment logic, the monitoring data of the multiple state parameters are fused and analyzed; the chain judgment logic includes comparing the real-time data of at least two of the temperature parameter, flow parameter and pressure parameter with the corresponding preset safety threshold, and comprehensively determining whether an emergency failure of the water cooling system has occurred based on the comparison results; Execution steps: When a comprehensive judgment is made that an emergency failure of the water cooling system occurs, an interlocking control command is generated and sent to drive multiple controlled devices of the refining furnace to perform coordinated emergency shutdown actions; the multiple controlled devices include at least two of the following: a first type of device for cutting off the heat source, a second type of device for removing the heated components, and a third type of device for stopping auxiliary processes.

7. The control method for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 6, characterized in that, The data acquisition steps include: using a sensor group installed at key nodes of the cooling water circuit of the refining furnace cover to collect in real time the inlet water temperature, return water temperature, flow rate and pressure data of the cooling water, and transmitting the collected analog signals to the control module.

8. The control method for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 7, characterized in that, The judgment steps include: the control module receives and converts the analog signal through its analog input module to obtain the corresponding physical quantity data; it calls the preset chain judgment logic to compare the real-time data of the inlet water temperature, return water temperature, flow rate and pressure with the preset temperature difference threshold, low flow rate threshold and high temperature threshold, and performs chain fault judgment according to the preset logic conditions.

9. The control method for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 8, characterized in that, The execution steps include: when the chain judgment logic determines that any chain fault condition is met, the control module, within one control scan cycle, synchronously outputs an emergency shutdown control signal to the actuators of the high-voltage power supply system, electrode lifting mechanism, furnace cover moving mechanism, argon blowing system and feeding system through its digital output module to trigger a coordinated shutdown action.

10. The control method for emergency accident interlocking shutdown of a refining furnace water cooling system according to claim 6, characterized in that, It also includes a status monitoring step: through data communication with the human-machine interface, it displays monitoring data, interlocking fault alarm information and equipment status in real time, and receives control commands or parameter settings issued through the human-machine interface.

Images