An electrical automation system for the unloading trolley of the coke screening building

Abstract

The present invention relates to the field of metallurgical coking technology, and discloses an electrical automation system for a coke screening building unloading trolley, comprising: an on-board electric control panel cabinet, internally provided with a component cavity and a wiring cavity, wherein a plurality of components are arranged in the component cavity, including a frequency converter and a panel cabinet PLC; the on-board electric control panel cabinet is externally provided with a first touch screen, an emergency stop button on the panel, a main power circuit breaker, a rail clamp release button, and a remote control receiver power circuit breaker, and is equipped with a transparent opening and closing door; a ground signal transfer box, provided with a second touch screen, and connected to a centralized control device via a first preset connection method, and connected to the coke screening building unloading trolley via a second preset connection method; the centralized control device, comprising a first host and a second host, which are respectively connected to the ground signal transfer box and the coke screening building unloading trolley. In this way, an electrical automation system for the coke screening building unloading trolley is realized.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy coking, and in particular to an electrical automation system for a coke screening building unloading trolley. Background Art

[0002] The coke screening plant's unloading trolleys play a crucial role in the coke production process, operating in an extremely harsh environment. Because the trolleys travel on a belt conveyor, it's impossible to install a closed dust cover above the conveyor for negative pressure vacuuming. Instead, localized vacuuming is performed at the unloading point, resulting in extremely high concentrations of coke dust (which is highly conductive) within the coke screening plant. Furthermore, the combined heat generated by the coke's heat dissipation and the summer heat, along with the improper installation location of the electrical control cabinet, lead to excessively high temperatures inside the control cabinet. This, coupled with inadequate interlocking protection measures, can easily damage the reel cables. Ultimately, this leads to frequent electrical failures in the coke screening plant's unloading trolleys, severely impacting production efficiency and safety.

[0003] The existing electrical systems of the coke screening plant unloading trolleys, especially those in which all electrical components are placed in an onboard electric control panel, often have the following technical problems:

[0004] First, the existing coke screening building unloading trolleys lack a comprehensive electrical automation system and rely primarily on manual operation, resulting in low operating efficiency, insufficient safety, and an inability to conduct remote monitoring and intelligent control. Furthermore, the electrical system has a low level of integration, complex signal interactions between devices, and high maintenance costs, making it difficult to meet the requirements of modern intelligent control.

[0005] Second, in the existing technology, the layout of electrical components in the on-board electric control panel used for the electrical system of the coke screening building unloading trolley is not reasonable, resulting in inconvenient maintenance, low safety, and unuser-friendly operation. At the same time, the cable connection method is not flexible enough, which affects the convenience of replacement and maintenance; the control method is not perfect and lacks interlocking protection, posing a safety hazard; the human-computer interaction interface is not user-friendly and the operation is not intuitive. In addition, the protective measures of the on-board electric control panel are insufficient and it is easily invaded by dust, which affects the service life of the electrical components and further reduces the reliability of the system.

[0006] Third, traditional limit switches rely on physical contact triggering and are easily affected by the harsh environment of the coke screening building, causing pollutants to accumulate on the limit switches or mechanical contacts that touch iron, resulting in poor contact or failure; the triggering mechanism of the limit switch is too simple, and once the limit switch fails, it may cause equipment damage or casualties; traditional limit switch maintenance relies on regular inspections and cannot perceive abnormal conditions in real time, posing a safety hazard. Summary of the Invention

[0007] This summary is intended to briefly introduce concepts that will be described in detail in the detailed description below. This summary is not intended to identify key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0008] The present invention proposes an electrical automation system for a coke screening floor unloading trolley to solve one or more of the technical problems mentioned in the above background technology part.

[0009] The present invention provides an electrical automation system for a coke screening building unloading trolley, comprising:

[0010] The onboard electric control panel is equipped with a component cavity and a wiring cavity. The wiring cavity is equipped with a terminal block with quick-insert spring self-locking terminals. The component cavity houses multiple components, including at least a frequency converter and a panel PLC (Programmable Logic Controller). The surface of the onboard electric control panel is equipped with a first touch screen, an emergency stop button, a main power circuit breaker, a rail clamp release button, and a remote control receiver power circuit breaker. A transparent opening and closing door is provided outside the first touch screen. The onboard electric control panel is embedded in a common cabinet, which is installed on the unloading trolley of the coke screening building.

[0011] A ground signal transfer box, comprising a second touch screen, connected to the centralized control device via a first preset connection method, and connected to the coke screening building unloading trolley via a second preset connection method;

[0012] The centralized control equipment includes a first host and a second host. The first host is equipped with a video surveillance system, and the second host is equipped with a centralized control system. The centralized control equipment is connected to the ground signal transfer box through a first preset connection method, and is connected to the coke screening building unloading trolley through a second preset connection method.

[0013] Optionally, the electrical automation system for the coke screening building unloading trolley of the present invention further includes:

[0014] Multiple vehicle-mounted components are installed on the unloading trolley of the coke screening building. The multiple vehicle-mounted components include a position code box signal receiver, a remote control receiver, a radar level meter, a rotary encoder, a blocking switch, a limit switch, a rail clamp release limit switch, an oil pressure switch, an oil pump, a traveling sound and light alarm, a comprehensive fault alarm buzzer and an on-board emergency stop button;

[0015] The peripheral device includes a plurality of position code boxes, and the plurality of position code boxes send position correction information to a position code box signal receiver.

[0016] Optionally, the cabinet PLC is deployed with a PLC control system, and the PLC control system is deployed with multiple interlocking control strategies, the multiple interlocking control strategies including at least one of the following: a walking motion interlocking strategy, a rail clamping motion control interlocking strategy, an emergency stop control strategy, a walking speed control strategy, and a comprehensive fault determination and interlocking strategy;

[0017] The walking action interlocking strategy is as follows: if the PLC control system receives a walking command from any device in the first input device group, it determines whether all preset frequency conversion conditions are met. If all preset frequency conversion conditions are met, it sends a start command to the frequency converter;

[0018] The rail clamp action control interlocking strategy is as follows: if the PLC control system receives a release command from the rail clamp release button, it sends an oil pump start command to the oil pump; when the left or right rail clamp release limit switch detects that the rail clamp is fully released, or the oil pump oil pressure reaches the preset oil pressure threshold, the PLC control system sends a stop command to the oil pump;

[0019] The emergency stop control strategy is: if the PLC control system receives an emergency stop command from any device in the second input device group, the PLC control system sends a trip command to the main power circuit breaker;

[0020] The walking speed control strategy is as follows: if the PLC control system receives a walking speed instruction from any device in the third input device instruction group, it sends a speed adjustment instruction to at least one response component in the first response component group;

[0021] The comprehensive fault judgment interlocking strategy is: if the PLC control system receives a fault instruction from any device in the fourth input device group, it sends a display instruction to each display device in the first display device group according to the fault instruction, sends a start instruction to the comprehensive fault alarm buzzer, and sends a control instruction to at least one response component in the second response component group.

[0022] Optionally, the installation scheme corresponding to the inverter is the first inverter installation scheme or the second inverter installation scheme; the first inverter installation scheme is: installing the inverter in the component cavity, and embedding the heat sink on the back of the inverter installation position; the second inverter installation scheme is: installing the inverter in a preset external inverter cabinet.

[0023] Optionally, the electrical automation system for the coke screening building unloading trolley of the present invention further includes:

[0024] The power transfer box is used to supply power to the unloading trolley of the coke screening building; the installation position corresponding to the power transfer box is determined from the preset power supply plan, wherein the preset power supply plan includes the driving distance of the unloading trolley of the coke screening building and the installation position corresponding to the driving distance.

[0025] Optionally, ordinary cabinets eliminate heat dissipation holes and knockout holes, and use explosion-proof through-holes and explosion-proof cable glands to replace the knockout holes. The corresponding joint treatment measures for ordinary cabinets are determined from the preset joint treatment measures table; the top of the ordinary cabinet is provided with a sloping eaves that is higher in the front and lower in the back; the cabinet door of the ordinary cabinet is provided with a transparent window.

[0026] Optionally, the preset power supply scheme is a first preset power supply scheme or a second preset power supply scheme.

[0027] Optionally, the ground signal transfer box further includes a fiber optic transceiver and a wireless communication transceiver; the first preset connection mode is a fiber optic connection or a cable connection; and the second preset connection mode is a wireless network connection.

[0028] Optionally, the multiple components further include a thermal relay, a signal isolator, a first network switch, and a second network switch; the peripheral devices further include an on-site remote control and multiple network cameras.

[0029] Optionally, the multiple vehicle-mounted components also include a travel drive component, a drum motor, an oil pump motor and a ground dust removal station; the travel drive component includes a travel motor, a travel motor fan and a travel motor brake.

[0030] The present invention has the following beneficial effects:

[0031] 1. It effectively improves the electrical automation level of the coke screening building unloading trolley, and improves work efficiency and operational safety. Specifically, the on-board electric control panel cabinet integrates key electrical components such as the frequency converter and panel cabinet PLC, and adopts the quick plug-in spring self-locking terminals of the terminal block, which improves the stability of wiring and the convenience of maintenance; the ground signal transfer box is equipped with a second touch screen, and is connected to the centralized control equipment and the coke screening building unloading trolley through a preset connection method, realizing remote monitoring and data interaction; the centralized control equipment includes a first host and a second host, which are used for remote monitoring of the coke screening building unloading trolley and remote control of the coke screening building unloading trolley respectively, so that the operating status of the coke screening building unloading trolley can be visualized, and the control accuracy and safety can be improved. Through these optimizations, the electrical control system of the coke screening building unloading trolley has been upgraded from a single manual operation mode to an automated and remote control mode, which reduces manual intervention and improves the intelligence level and operational reliability of the system;

[0032] 2. Improved the heat dissipation effect and safety of the on-board electric control panel in the electrical control system of the coke screening building unloading trolley. Specifically, the first inverter installation scheme installs the inverter in the component cavity and embeds a radiator on the back to enhance the heat dissipation effect; the second inverter installation scheme installs the inverter in an external inverter cabinet, which is flexible and convenient for installation and maintenance. In addition, the cabinet body of the on-board electric control panel has eliminated the heat dissipation holes and knock-out holes, and adopts explosion-proof through-holes and explosion-proof glands to improve safety; and through reasonable joint treatment and transparent window design, the protection and visualization of electrical components are enhanced. Through these design optimizations, the heat dissipation capacity, safety and maintenance convenience of the on-board electric control panel have been improved, ensuring that the electrical automation system of the coke screening building unloading trolley has better environmental adaptability and longer service life while operating efficiently and stably;

[0033] 3. Improved the reliability of limit detection for the coke screening building unloading trolley, avoiding equipment damage or safety accidents caused by the failure of a single trigger mechanism. Specifically, RFID tags are used to update the preset limit information table to provide a basis for abnormality detection and maintenance; combined with the contact verification of the limit switch and the non-contact verification of the infrared transmitter and infrared receiver, the accuracy of limit detection is further improved to ensure that the coke screening building unloading trolley can stop in time when it exceeds the maximum travel range; at the same time, the cabinet PLC also regularly counts the number of limit triggers, automatically identifies abnormalities and reminds staff to perform maintenance. Not only does it enhance the stability of limit detection, but it can also monitor the status of iron collisions and the coke screening building unloading trolley in real time, optimize maintenance strategies, and reduce safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements are not necessarily drawn to scale.

[0035] Figure 1 This is an exemplary structural diagram of an electrical automation system for a coke screening building unloading trolley according to the present invention;

[0036] Figure 2 This is a front view of an onboard electric control panel cabinet for an electrical automation system of a coke screening building unloading trolley according to the present invention;

[0037] Figure 3 This is a right view of a vehicle-mounted electric control panel cabinet for an electrical automation system of a coke screening building unloading trolley according to the present invention;

[0038] Figure 4 This is a front view of a common cabinet of an electrical automation system for a coke screening floor unloading trolley according to the present invention;

[0039] Figure 5 This is a right side view of a common cabinet of an electrical automation system for a coke screening floor unloading trolley according to the present invention;

[0040] Figure 6 The present invention is a schematic diagram of system connections of an electrical automation system for a coke screening floor unloading trolley. DETAILED DESCRIPTION

[0041] The present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0042] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

[0043] It should be noted that the concepts of "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0044] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0045] The names of the messages or information exchanged between multiple devices of the present invention are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0047] like Figure 1 FIG. 1 is a schematic diagram showing an exemplary structure of an electrical automation system for a coke screening floor unloading trolley according to the present invention, which specifically includes the following modules:

[0048] The on-board electric control cabinet 101 is provided with a component cavity and a wiring cavity, the wiring cavity is provided with a terminal block, the terminal block adopts a quick plug-in spring self-locking terminal, and the component cavity is provided with multiple components, and the multiple components include at least a frequency converter and a cabinet PLC; the surface of the on-board electric control cabinet 101 is provided with a first touch screen, an emergency stop button on the panel, a main power circuit breaker, a rail clamp release button and a remote control receiver power circuit breaker, and a transparent opening and closing door is provided outside the first touch screen; the on-board electric control cabinet 101 is embedded in an ordinary cabinet, and the ordinary cabinet is installed on the unloading trolley of the coke screening building.

[0049] In some embodiments, as Figure 2 As shown, the onboard electronic control panel 101 is equipped with a component chamber and a wiring chamber. The component chamber is used to install multiple components, while the wiring chamber is used to aggregate and manage all external wiring of the onboard electronic control panel 101. A terminal block is also located within the wiring chamber. The terminal block has been changed from screw-type terminals to quick-insert spring-locking terminals. The multiple components installed in the component chamber include at least a frequency converter and a cabinet PLC. The surface of the onboard electronic control panel 101 is equipped with a first touch screen, an emergency stop button, a main power circuit breaker, a rail clamp release button, and a remote control receiver power circuit breaker. A transparent opening and closing door is also provided outside the first touch screen. The onboard electronic control panel 101 is embedded in a conventional cabinet, which is in turn mounted on the coke screening building unloading trolley.

[0050] In practice, the first touch screen can be a touch screen. The terminal block can be an ST series quick-insert spring-locking terminal block. The onboard electric control panel 101 and standard cabinets can be explosion-proof. For example, both can be explosion-proof. The onboard electric control panel 101 is an electrical control cabinet installed on the coke screening floor unloading trolley. It is primarily used to centrally manage and control the trolley's electrical systems, including power, signal processing, and control functions. The onboard electric control panel 101 is typically divided into a component compartment and a wiring compartment, respectively for mounting electronic components and managing external wiring. The terminal block is a component used to connect and aggregate electrical circuits and is typically installed in the wiring compartment of the onboard electric control panel 101. Quick-insert spring-locking terminals are screw-free terminals. They utilize a spring-locking mechanism that automatically clamps the wires, ensuring reliable contact. Screw-type terminals, which secure the wires by tightening screws, are widely used in traditional electrical equipment. However, vibration and other factors can cause the wires to loosen over time. A frequency converter is an electronic device used to regulate motor speed. It controls the motor's operating speed by varying the power supply frequency, thereby achieving energy savings and precise control. The PLC is an industrial control computer installed in the onboard electronic control cabinet 101. It receives various sensor signals and controls the operation of the coke screening floor unloading trolley. The PLC executes pre-set programs to automatically control motor start / stop, speed change, braking, and other operations, and communicates with the remote centralized control system for intelligent control. The emergency stop button is an emergency stop switch installed on the exterior of the onboard electronic control cabinet 101 in a convenient location. In an emergency, the operator can press the button to quickly disconnect the power supply or control signal to the equipment, stopping the coke screening floor unloading trolley and ensuring the safety of personnel and equipment. The main power circuit breaker controls the power supply to the entire electronic control cabinet and serves as the system's master switch. The rail clamp release button is used to release the rail clamp, allowing the coke screening floor unloading trolley to resume operation. It is typically used before starting the coke screening floor unloading trolley. The rail clamp is a mechanical device used to fix the unloading trolley of the coke screening building. It can clamp the rails when the vehicle is parked to prevent the trolley from sliding. The remote control receiver is used to receive remote control signals to control the operation of the unloading trolley of the coke screening building. The remote control receiver power circuit breaker is a protective device that can cut off the power supply of the remote control receiver when the power supply is abnormal or maintenance is required, ensuring safe and reliable operation. The unloading trolley of the coke screening building is a rail-based walking device used for coke transportation. It is usually installed in the coke screening building and is used to unload coke from the storage silo into the conveying system. It can move along the rails and is equipped with a corresponding electronic control system to achieve automated operation and remote control.

[0051] The ground signal transfer box 102 includes a second touch screen. The ground signal transfer box is connected to the centralized control device 103 through a first preset connection method, and is connected to the coke screening building unloading trolley through a second preset connection method.

[0052] In some embodiments, as Figure 6 As shown, the ground signal transfer box 102 is provided with a second touch screen, and is connected to the centralized control device 103 through a first preset connection method, and is connected to the coke screening building unloading trolley through a second preset connection method.

[0053] In practice, the second touch screen can be a touch screen. The second preset connection method can be a wireless network connection. The second touch screen of the ground signal transfer box 102 and the first touch screen of the onboard electric control cabinet 101 serve as backup for each other and can assist in fault diagnosis when either touch screen fails. In addition to conventional control and monitoring functions, the first and second touch screens also have customized data display pages to facilitate maintenance personnel to diagnose faults. The screen content includes: the status of all used input or output points in the cabinet PLC, which facilitates confirmation of normal signal transmission; the variable status or data transmitted to the cabinet PLC by the second host of the centralized control system deployed in the centralized control device 103, which is used to monitor data interaction related to remote control; and control soft keys to support remote control of the coke screening building unloading trolley. Through these touch-screen data display operations, maintenance personnel can preliminarily locate the cause of the fault without opening the ordinary cabinet of the onboard electric control cabinet 101, thereby improving maintenance efficiency and ensuring work safety.

[0054] Among them, the ground signal transfer box is an electrical device installed on the ground, which is used to connect and transfer signals and data between the unloading trolley of the coke screening building and the centralized control system. The touch screen is an interactive device with display and touch functions, which can be used to monitor the operating status of the equipment, input operating instructions and set parameters. The variable status refers to the real-time status of the variable data stored in the cabinet PLC or the centralized control system. These variables can be control parameters calculated inside the cabinet PLC, values ​​read by sensors, or remote data transmitted to the cabinet PLC by the centralized control system. The input or output point status refers to the real-time status of the digital input and digital output ports in the cabinet PLC or the centralized control system. The input point status is usually used to monitor sensor or switch signals, for example, whether the emergency stop button is triggered.

[0055] The centralized control device 103 includes a first host and a second host. The first host is equipped with a video surveillance system, and the second host is equipped with a centralized control system. The centralized control device 103 is connected to the ground signal transfer box 102 through a first preset connection method, and is connected to the coke screening building unloading trolley through a second preset connection method.

[0056] In some embodiments, as Figure 6As shown, the centralized control device 103 includes a first host and a second host. The first host is deployed with a video surveillance system for displaying the monitoring screen of the coke screening building unloading trolley; the second host is deployed with a centralized control system for remotely controlling the coke screening building unloading trolley. The centralized control device 103 is connected to the ground signal transfer box 102 through a first preset connection method, and is connected to the coke screening building unloading trolley through a second preset connection method. In practice, the first host or the second host can be a host deployed with Ubuntu. A fiber optic transceiver can be provided in the centralized control device 103. Specifically, the fiber optic transceiver in the centralized control device 103 is connected to the fiber optic transceiver in the ground signal transfer box 102 through a first preset connection method. Ubuntu is a Linux distribution that is widely used in desktops, servers, and cloud computing environments.

[0057] In these embodiments, the electrical automation level of the coke screening building unloading trolley is effectively improved, and the operating efficiency and operational safety are improved. Specifically, the on-board electric control panel cabinet integrates key electrical components such as the frequency converter and the panel cabinet PLC, and adopts the quick plug-in spring self-locking terminals of the terminal block, which improves the stability of the wiring and the convenience of maintenance; the ground signal transfer box is provided with a second touch screen, and is connected to the centralized control equipment and the coke screening building unloading trolley through a preset connection method, realizing remote monitoring and data interaction; the centralized control equipment includes a first host and a second host, which are respectively used to remotely monitor the coke screening building unloading trolley and remotely control the coke screening building unloading trolley, so that the operating status of the coke screening building unloading trolley is visualized, and the control accuracy and safety are improved. Through these optimizations, the electrical control system of the coke screening building unloading trolley is upgraded from a single manual operation mode to an automated and remote control mode, reducing manual intervention and improving the intelligence level and operational reliability of the system.

[0058] In some embodiments, in order to further solve the second technical problem described in the background technology section, namely, "In the prior art, the layout of electrical components of the on-board electric control panel cabinet used for the electrical system of the coke screening building unloading trolley is not reasonable, resulting in inconvenient maintenance, low safety, and unhumanized operation. At the same time, the cable connection method is not flexible enough, affecting the convenience of replacement and maintenance; the control method is not perfect, lacks interlocking protection, and poses a safety hazard; the human-computer interaction interface is not friendly enough, and the operation is not intuitive enough. In addition, the protective measures of the on-board electric control panel cabinet are insufficient, and it is easily invaded by dust, which affects the service life of the electrical components and further reduces the reliability of the system", in some embodiments of the present invention, an electrical automation system for the coke screening building unloading trolley also includes:

[0059] Multiple vehicle-mounted components 104 are mounted on the coke screening building unloading trolley. The multiple vehicle-mounted components 104 include a position code box signal receiver, a remote control receiver, a radar level meter, a rotary encoder, a material blocking switch, a limit switch, a rail clamp release limit switch, an oil pressure switch, an oil pump, a traveling sound and light alarm, a comprehensive fault alarm buzzer, and a vehicle-mounted emergency stop button.

[0060] The peripheral device 105 includes a plurality of position code boxes, and the plurality of position code boxes send position correction information to a position code box signal receiver.

[0061] In some embodiments, as Figure 6 As shown, multiple vehicle-mounted components 104 include a position code box signal receiver, a remote control receiver, a radar level meter, a rotary encoder, a material jam switch, a forward or reverse limit switch, a left or right rail clamp release limit switch, an oil pressure switch, an oil pump, a traveling sound and light alarm, a comprehensive fault alarm buzzer and a vehicle-mounted emergency stop button.

[0062] The position code box signal receiver receives position information sent by the position code box to adjust the position of the coke screening trolley. The remote control receiver receives remote control signals from an on-site remote control, enabling remote control of the coke screening trolley. The radar level meter detects the coke level in the coke storage bin and alerts the operator to adjust the position of the coke screening trolley promptly to prevent coke overflow. The rotary encoder detects the angular displacement of the coke screening trolley's travel motor or other components to precisely control its travel speed and position. The blockage switch detects blockage in the coke conveying channel and issues an alarm signal when blockage occurs. The forward or reverse limit switch detects when the coke screening trolley has reached its travel end to prevent overtravel. A limit switch is an electrical component used to detect the range of motion of mechanical equipment. It triggers a signal when the equipment reaches a set position, enabling shutdown, reversal, or other control operations. In practice, it may include a first limit switch and a second limit switch. The first limit switch can be a forward limit switch, and the second limit switch can be a reverse limit switch. The rail clamp release limit switch detects whether the rail clamp is in the released state, ensuring normal start-up and movement of the coke screening floor unloading trolley. In practice, this may include either the left or right rail clamp release limit switch. The oil pressure switch detects the oil pressure in the hydraulic system and provides an alarm or control signal if the oil pressure is abnormal. The oil pump provides hydraulic power to drive the rail clamp or other hydraulic actuators. The travel sound and light alarm emits audible and visual warnings during the movement of the coke screening floor unloading trolley, alerting nearby personnel to safety. The integrated fault alarm buzzer sounds an audible alarm when the system detects a fault, prompting the operator to inspect and address the abnormality. The onboard emergency stop button is used to manually trigger an emergency stop in an emergency, cutting off power or control signals and immediately stopping the coke screening floor unloading trolley. Angular displacement refers to the change in position relative to a reference position when an object rotates about a fixed axis. The rail clamp is a mechanical device used to secure the coke screening floor unloading trolley, typically driven by a hydraulic or electric system.

[0063] like Figure 6 As shown, peripheral equipment 105 includes multiple position code boxes, which store preset position information and send position correction signals to the position code box signal receiver when the coke screening floor unloading trolley passes by. In practice, the preset travel distance of the coke screening floor unloading trolley may be 6 meters. Therefore, a position code box can be installed every 1 meter for position correction. The position code box is a device that stores preset position information and is typically installed at a specific location on the track.

[0064] The cabinet PLC is deployed with a PLC control system, and the PLC control system is deployed with multiple interlocking control strategies, including at least one of the following: walking action interlocking strategy, track clamping action control interlocking strategy, emergency stop control strategy, walking speed control strategy, comprehensive fault judgment and its interlocking strategy;

[0065] The walking action interlocking strategy is as follows: if the PLC control system receives a walking command from any device in the first input device group, it determines whether all preset frequency conversion conditions are met. If all preset frequency conversion conditions are met, it sends a start command to the frequency converter;

[0066] The rail clamp action control interlocking strategy is as follows: if the PLC control system receives a release command from the rail clamp release button, it sends an oil pump start command to the oil pump; when the left or right rail clamp release limit switch detects that the rail clamp is fully released, or the oil pump oil pressure reaches the preset oil pressure threshold, the PLC control system sends a stop command to the oil pump;

[0067] The emergency stop control strategy is: if the PLC control system receives an emergency stop command from any device in the second input device group, the PLC control system sends a trip command to the main power circuit breaker;

[0068] The walking speed control strategy is as follows: if the PLC control system receives a walking speed instruction from any device in the third input device instruction group, it sends a speed adjustment instruction to at least one response component in the first response component group;

[0069] The comprehensive fault judgment interlocking strategy is: if the PLC control system receives a fault instruction from any device in the fourth input device group, it sends a display instruction to each display device in the first display device group according to the fault instruction, sends a start instruction to the comprehensive fault alarm buzzer, and sends a control instruction to at least one response component in the second response component group.

[0070] In some embodiments, the cabinet PLC is deployed with a PLC control system, in which multiple interlocking control strategies are deployed, and the multiple interlocking control strategies include at least one of the following: walking action interlocking strategy, track clamp action control interlocking strategy, emergency stop control strategy, walking speed control strategy, comprehensive fault judgment and its interlocking strategy.

[0071] The travel action interlock strategy means that when the cabinet PLC receives a travel start command from any device in the first input device group, it checks the status of travel-related components to determine whether the preset frequency conversion conditions are met. Only after ensuring that all conditions meet safety requirements will the travel command be executed. In practice, the first input device group includes the first touch screen, the second touch screen, the second host computer, the forward button of the unloading vehicle, and the on-site remote control. The preset frequency conversion conditions include whether the drum cable is tightened, the rail clamp is fully released, the travel motor fan is started and running, and the travel motor brake is started and running.

[0072] The rail clamp motion control interlocking strategy requires that the rail clamp be fully released before the coke screening floor unloading trolley can move. Otherwise, the panel PLC will prohibit the execution of the movement command to prevent the unloading trolley from malfunctioning while clamping the rail, which could damage the equipment. After receiving the release command, the panel PLC sends a start command to the oil pump and checks the rail clamp status and oil pressure. If the rail clamp is fully released or the oil pressure reaches the preset threshold, the panel PLC sends a stop command to the oil pump. In practice, the preset oil pressure threshold can be 5 MPa.

[0073] The emergency stop control strategy means that when the unloading trolley in the coke screening building is operating, if the cabinet PLC receives an emergency stop command from any device in the second input device group, the cabinet PLC will send a trip command to the main power circuit breaker. In practice, the second input device group includes the on-board emergency stop button, the second host computer, and the panel emergency stop button. Specifically, when the cabinet PLC receives the emergency stop command, it will send a trip command to the main power circuit breaker to trip the main power circuit breaker and cut off the power. Among them, the trip command refers to the disconnect command sent by the control system to the circuit breaker or switch device to cut off the circuit and stop the operation of the electrical equipment.

[0074] The travel speed control strategy means that when the cabinet PLC receives a travel speed instruction from any device in the third input device group, it will send a speed adjustment instruction to at least one response component in the first response component group. In practice, the third input device group includes a first touch screen and a second touch screen. The first response component group includes a travel motor, a travel motor fan, a frequency converter, a drum motor, a travel sound and light alarm, and a track clamp. Specifically, a staff member can issue a travel speed instruction through the first touch screen or the second touch screen to adjust the travel speed of the coke screening building unloading trolley. After receiving the travel speed instruction, the cabinet PLC will send a speed adjustment instruction to at least one response component in the first response component group.

[0075] The comprehensive fault determination interlocking strategy means that when the cabinet PLC receives a fault indication from any device in the fourth input device group, it will send a display instruction to each display device in the first display device group, activate the comprehensive fault alarm buzzer, and simultaneously issue a control command to at least one response component in the second response component group. In practice, the fourth input device group includes the inverter, travel motor, travel motor fan, travel motor brake, drum motor, rail clamp, and oil pump motor. The first display device group includes the first and second touch screens. The second response component group includes the inverter and the main power circuit breaker. Specifically, when any device in the fourth input device group fails during operation of the coke screening floor unloading trolley and the cabinet PLC receives the corresponding fault indication, it will send a display instruction to the first and second touch screens to alert personnel, activate the comprehensive fault alarm buzzer to alert personnel near the coke screening floor unloading trolley, and simultaneously issue a control command to the inverter or main power circuit breaker to promptly stop the trolley.

[0076] Among them, the installation scheme corresponding to the inverter is the first inverter installation scheme or the second inverter installation scheme; the first inverter installation scheme is: installing the inverter in the component cavity, and embedding the heat sink on the back of the inverter installation position; the second inverter installation scheme is: installing the inverter in a preset external inverter cabinet.

[0077] In some embodiments, the inverter installation scheme includes a first inverter installation scheme or a second inverter installation scheme. The first inverter installation scheme is to install the inverter in a component cavity, and simultaneously embed a heat sink behind the component cavity installation location to reduce heat dissipated by the inverter. The second inverter installation scheme is to install the inverter in a pre-set external inverter cabinet.

[0078] In practice, the heat sink installed on the back of the component cavity in the first inverter installation scheme can be an aluminum alloy heat sink. In the second inverter installation scheme, the inverter cabinet can be installed in a location with better air quality in the coke screening building to further reduce the temperature of the onboard electronic control panel 101. The inverter's output power cable can be a double-steel-wire flat flexible cable, and the control cable can be a composite double-steel-wire flat flexible cable. Double-steel-wire flat flexible cable is a cable specifically designed for mobile equipment. It incorporates two steel-wire reinforcement cores to increase its tensile strength and durability. Its flat structure makes it more suitable for frequent bending and dragging. Composite double-steel-wire flat flexible cable is a double-steel-wire flat flexible cable with additional functional materials or shielding layers, providing enhanced anti-interference capabilities, higher temperature resistance, and wider environmental compatibility. An aluminum alloy heat sink is a heat dissipation device made of aluminum alloy. It leverages the high thermal conductivity and lightweight properties of aluminum alloy to quickly conduct and dissipate heat generated during equipment operation into the air.

[0079] Among them, an electrical automation system for a coke screening building unloading trolley also includes:

[0080] The power adapter box 106 is used to supply power to the unloading trolley of the coke screening building; the installation position corresponding to the power adapter box 106 is determined from the preset power supply scheme, wherein the preset power supply scheme includes the driving distance of the unloading trolley of the coke screening building and the installation position corresponding to the driving distance.

[0081] In some embodiments, the power transfer box 106 is used to supply power to the coke screening building unloading trolley. Depending on the actual distance traveled by the coke screening building unloading trolley, the power transfer box 106 has different corresponding installation positions. In practice, the installation scheme can be determined by comparing the preset distance and the actual travel distance of the coke screening building unloading trolley. The preset distance can be 100m. The power transfer box 106 can transfer three-phase 380V AC power to supply power to the coke screening building unloading trolley. If the travel distance of the coke screening building unloading trolley is less than or equal to 100m, the power transfer box can be installed at the head, middle or tail position of the journey. If the travel distance of the coke screening building unloading trolley is greater than 100m, the power transfer box can be installed in the middle position of the journey. Among them, three-phase refers to three-phase alternating current, which is often used to power high-power equipment. The power transfer box is a device used for power distribution and switching. Its main function is to transmit power to the target device according to the preset power supply scheme.

[0082] Among them, ordinary cabinets cancel the heat dissipation holes and knock-out holes, and use explosion-proof through-holes and explosion-proof cable glands to replace the knock-out holes. The corresponding joint treatment measures of ordinary cabinets are determined from the preset joint treatment measures table; the top of the ordinary cabinet is equipped with a sloping eaves with a high front and a low back; the cabinet door of the ordinary cabinet is equipped with a transparent window.

[0083] In some embodiments, as Figure 4 As shown, conventional cabinets have eliminated heat dissipation holes and knockout holes. Explosion-proof through-holes and explosion-proof cable glands are used to seal cable connections, replacing knockout holes. Conventional cabinet joints require different joint treatment measures depending on the joint type. The preset joint treatment measures table includes joint types and joint treatment measures. Joint types can be fixed or movable. If the joint type of a conventional cabinet is fixed, the joint can be sealed with glue; if the joint type is movable, the joint can be sealed with sealing strips. The cabinet roof of a conventional cabinet is designed with a sloping structure that is higher in front and lower in the back, resembling an eave. This effectively prevents dust accumulated on the cabinet roof from falling into the cabinet when the cabinet door is opened. Conventional cabinet doors also feature a transparent window, allowing staff to read the information displayed on the first touch screen of the on-board electronic control panel cabinet 101 even when the cabinet door is closed.

[0084] Among them, heat dissipation holes refer to holes set on the electrical cabinet or equipment housing, which are used to dissipate the heat generated by the internal components during operation to prevent excessive temperature from affecting the performance and life of the equipment. Knock-out holes refer to holes punched or molded in advance on the electrical cabinet or equipment housing, usually covered with thin metal sheets or plastic covers. During installation, the corresponding covers are knocked off as needed to introduce or lead out cables, wires, etc. Explosion-proof glands are special connectors used for connecting explosion-proof electrical equipment or lines. They are designed to prevent sparks or arcs generated internally from igniting explosive gases or dust in the surrounding area. Explosion-proof cable glands are devices used to fix and seal cables. They are usually used for cables to pass through equipment housings or connect to electrical equipment. Explosion-proof cable glands can not only fix cables to prevent them from loosening or pulling off, but also provide seals to prevent water, dust, oil, etc. from entering the interior of the equipment.

[0085] The preset power supply scheme is the first preset power supply scheme or the second preset power supply scheme.

[0086] In some embodiments, the preset power supply scheme includes a first preset power supply scheme or a second preset power supply scheme. The first preset power supply scheme is to realize power supply by reeling in and out the cable; the second preset power supply scheme is to realize power supply by hanging the towing cable. Specifically, in the first preset power supply scheme, the cable is automatically extended or retracted during the travel of the coke screening building unloading trolley by driving the reel motor, which is suitable for longer journeys, can effectively reduce the dragging wear of the cable, and improve the stability of the power supply system. In the second preset power supply scheme, the cable is suspended above or to the side of the travel track of the coke screening building unloading trolley through a hanging cable rack. The cable is pulled synchronously with the movement of the coke screening building unloading trolley, thereby realizing power supply, which is suitable for shorter journeys.

[0087] In practice, the power supply scheme can be selected based on a preset distance, which can be 100 meters. When the total distance traveled by the unloading trolleys at the coke screening building is less than or equal to 100 meters, the second preset power supply scheme can be used; when the total distance traveled by the unloading trolleys at the coke screening building is greater than 100 meters, the first preset power supply scheme can be used.

[0088] Among them, the ground signal transfer box also includes a fiber optic transceiver and a wireless communication transceiver; the first preset connection method is fiber optic connection or cable connection; the second preset connection method is wireless network connection.

[0089] In some embodiments, the ground signal transfer box 102 further includes a fiber optic transceiver and a wireless communication transceiver; the first preset connection method is a fiber optic connection or a cable connection, and the second preset connection method can be a wireless network connection. The first host establishes a data connection with the fiber optic transceiver in the ground signal transfer box 102 via the fiber optic transceiver and the single-mode optical fiber, and performs remote signal transmission via the wireless communication transceiver. The connection method between the second host and the ground signal transfer box 102 can be a fiber optic connection or a cable connection. If the connection method is a fiber optic connection, the second host establishes a data connection with the fiber optic transceiver in the ground signal transfer box 102 via the fiber optic transceiver and the single-mode optical fiber, and performs remote signal transmission via the wireless communication transceiver; if the connection method is a cable connection, the second host is connected to the transfer box PLC in the ground signal transfer box 102 via a computer cable, and the transfer box PLC is first connected to the transfer box network switch, and then performs remote signal transmission via the wireless communication transceiver.

[0090] In practice, the first host can establish a communication connection with multiple network cameras surrounding the coke screening building unloading trolley via the ground signal transfer box 102 to monitor the operating status of the coke screening building unloading trolley. The second host can also establish a communication connection with the cabinet PLC via the ground signal transfer box 102 to remotely control the coke screening building unloading trolley. Fiber optic transceivers are used to convert optical signals into electrical signals, enabling interconnection between fiber optic network devices and electrical network devices. Single-mode fiber is a type of optical fiber used for long-distance optical communication. It transmits in a single mode, typically using optical signals with a wavelength of 1310nm or 1550nm. It can transmit over distances of tens to hundreds of kilometers and offers lower signal attenuation and higher bandwidth than multimode fiber. Wireless communication transceivers are devices used for wireless data transmission, capable of sending and receiving wireless signals, enabling communication between remote devices. Hardwiring refers to the direct connection of devices using physical cables (such as wires, cables, or optical fibers) to transmit signals or power. Compared to wireless connections, hardwiring generally offers greater stability and interference resistance and is commonly used in industrial control systems.

[0091] Among them, the multiple components also include a thermal relay, a signal isolator, a first network switch and a second network switch; the peripheral devices also include an on-site remote control and multiple network cameras.

[0092] In some embodiments, thermal relays are used to detect and protect motors or circuits to prevent equipment damage due to overload or overheating. When a circuit overload is detected, the circuit will be automatically cut off to protect the equipment. Signal isolators are used to electrically isolate input and output signals to prevent interference, improve the system's anti-interference ability and the stability of signal transmission. Network switches are used to implement data exchange between multiple devices, ensure fast and stable signal transmission, and improve system communication efficiency. The on-site remote control is used to remotely control the operation of the coke screening building unloading trolley at the work site, and the operator can control the coke screening building unloading trolley from a safe distance. Multiple network cameras are used to monitor the operating status and working area of ​​the coke screening building unloading trolley in real time, and transmit video signals to the video monitoring system so that managers can remotely view the working status of the coke screening building unloading trolley.

[0093] In practice, the multiple network cameras can be three cameras, installed at the front, middle, and rear of the coke screening floor unloading trolley to provide comprehensive monitoring of the trolley. Thermal relays can protect multiple electrical devices. For example, thermal relays can be installed on the travel motor, travel motor fan, travel motor brake, drum motor, and oil pump motor to prevent damage from overload or overheating. The first network switch can be used to maintain data transmission between the multiple cameras and the video surveillance system. The second network switch can be used to maintain data transmission between the centralized control system, the cabinet PLC, and the first touch screen.

[0094] Electrical isolation refers to the use of physical or electronic means to isolate electrical signals between circuits or devices, preventing direct current transmission while allowing signals or energy to be transmitted via specific means. A drum motor is a motor used to drive the drum's rotation. It is typically used to control the retraction and extension of cables or wire ropes, ensuring that the cables are extended or retracted as needed to avoid entanglement or damage. An oil pump motor is a motor used to drive a hydraulic pump or other type of pump. In practice, it provides hydraulic power to control the clamping and release of the track clamp, ensuring that the coke screening floor unloading trolley is stably fixed when parked and smoothly released before starting. A travel motor is a motor that drives a vehicle (such as the coke screening floor unloading trolley) along the track. It is typically used in conjunction with a frequency converter (VFD) to achieve speed control, smooth starting and stopping, and energy-saving operation. A travel motor fan is a heat dissipation device used to cool the travel motor. It uses forced ventilation to reduce motor temperature, prevent overheating from prolonged operation, and extend the motor's service life and operational stability. The travel motor brake refers to a device used to perform a braking function on the travel motor. It usually automatically locks when the unloading trolley of the coke screening floor stops running, so that the trolley remains stationary, prevents inertial sliding, and improves operational safety.

[0095] Among them, multiple vehicle-mounted components also include a travel drive component, a drum motor, an oil pump motor and a ground dust removal station; the travel drive component includes a travel motor, a travel motor fan and a travel motor brake.

[0096] In some embodiments, the plurality of vehicle-mounted components 104 further include a travel drive component, a drum motor, an oil pump motor, and a ground dust removal station. The travel drive component includes a travel motor, a travel motor fan, and a travel motor brake.

[0097] The drum motor drives the wire rope drum, which retracts and releases the cable of the coke screening floor unloading trolley, ensuring that the cable does not become entangled or damaged during operation. The ground dust removal station collects and processes dust generated during the unloading process, reducing environmental pollution and improving air quality in the work area. The travel motor drives the coke screening floor unloading trolley along the track, providing forward and reverse power. The travel motor fan dissipates heat from the travel motor, preventing overheating and extending its service life while ensuring operational stability. The travel motor brake is used to brake the trolley when it stops or in an emergency, ensuring a secure stop and preventing unexpected sliding.

[0098] In these embodiments, the heat dissipation effect and safety of the on-board electric control panel in the electrical control system of the coke screening building unloading trolley are improved. Specifically, the first inverter installation scheme installs the inverter in the component cavity and embeds a radiator on the back, which enhances the heat dissipation effect; the second inverter installation scheme installs the inverter in an external inverter cabinet, which is flexible and convenient for installation and maintenance. In addition, the cabinet body of the on-board electric control panel eliminates the heat dissipation holes and knock-out holes, and adopts explosion-proof through-holes and explosion-proof glands to improve safety; and through reasonable seam treatment and transparent window design, the protection and visualization of electrical components are enhanced. Through these design optimizations, the heat dissipation capacity, safety and maintenance convenience of the on-board electric control panel are improved, ensuring that the electrical automation system of the coke screening building unloading trolley has better environmental adaptability and longer service life while operating efficiently and stably.

[0099] In some embodiments, to further address the third technical problem described in the background technology section, namely, "traditional limit switches rely on physical contact triggering and are easily affected by the harsh environment of the coke screening building, resulting in the accumulation of contaminants on the mechanical contacts of the limit switch or the contact iron, causing poor contact or failure; the limit switch triggering mechanism is too simple, and once the limit switch fails, it may cause equipment damage or casualties; traditional limit switch maintenance relies on regular inspections and cannot detect abnormal conditions in real time, posing a safety hazard," in some embodiments of the present invention, the multiple vehicle-mounted components also include a first RFID (Radio Frequency Identification) reader, a second RFID reader, a first infrared receiver, and a second infrared receiver; the peripheral devices also include a first RFID tag, a second RFID tag, a first infrared transmitter, a second infrared transmitter, a first contact iron, and a second contact iron; and the multiple interlocking control strategies also include a limit switch trigger verification interlocking strategy. The first contact iron is used to trigger the first limit switch, the second contact iron is used to trigger the second limit switch, the first infrared receiver is used to receive the infrared signal from the first infrared transmitter, the second infrared receiver is used to receive the infrared signal from the second infrared transmitter, the first RFID reader is used to read the first RFID tag, and the second RFID reader is used to read the second RFID tag. The limit switch trigger verification interlocking strategy includes the limit joint verification strategy and the limit comprehensive maintenance early warning strategy.

[0100] In some embodiments, the plurality of vehicle-mounted components further include a first RFID reader, a second RFID reader, a first infrared receiver, and a second infrared receiver. The peripheral devices further include a first RFID tag, a second RFID tag, a first infrared transmitter, a second infrared transmitter, a first contact iron, and a second contact iron. The first contact iron is used to trigger a first limit switch, and the second contact iron is used to trigger a second limit switch. The first RFID reader is used to read the tag information of the first RFID tag. The second RFID reader is used to read the tag information of the second RFID tag. The first infrared receiver is used to receive the infrared signal from the first infrared transmitter. The second infrared receiver is used to receive the infrared signal from the second infrared transmitter. The first infrared receiver and the first RFID reader are installed at the front end of the coke screening building unloading trolley. The second infrared receiver and the second RFID reader are installed at the rear end of the coke screening building unloading trolley. The first infrared transmitter, the first contact iron, the first RFID tag, the second infrared transmitter, the second contact iron, and the second RFID tag are installed at both ends of the track of the coke screening building unloading trolley. Specifically, a first infrared emitter, a first touch iron and a first RFID tag can be installed in the forward direction of the coke screening building unloading trolley, at a preset distance from the coke screening building unloading trolley. A second infrared emitter, a second touch iron and a second RFID tag can be installed in the backward direction of the coke screening building unloading trolley, at a preset distance from the coke screening building unloading trolley. When the coke screening building unloading trolley moves forward, it will pass by the first RFID tag, the first touch iron and the first infrared emitter in sequence. When the coke screening building unloading trolley moves backward, it will pass by the second RFID tag, the second touch iron and the second infrared emitter in sequence. In practice, the preset distance can be 100m. The label information stored in the first RFID tag and the second RFID tag is the touch iron identification code. The iron-bumping identification code can be composed of the coke screening building area number, the track number and the iron-bumping number. For example, the iron-bumping identification code stored in the first RFID tag can be T1-P1-01, and the iron-bumping identification code stored in the second RFID tag can be T1-P1-02, where T1 can be the coke screening building area number, P1 can be the track number, 01 can be the iron-bumping number of the first iron-bumping number, and 02 can be the iron-bumping number of the second iron-bumping number.

[0101] The multiple interlocking control strategies also include a limit switch trigger verification interlocking strategy, which includes a limit joint check and a limit comprehensive warning.

[0102] The combined limit verification strategy is as follows: If the cabinet PLC receives the tag information from the first RFID tag, it further determines whether the first limit switch is triggered by the first touch screen and whether it receives the infrared signal from the first infrared receiver. If the first touch screen is triggered and the cabinet PLC receives the infrared signal from the first infrared receiver, the cabinet PLC updates the preset limit information table. Specifically, the cabinet PLC writes the trigger time and the touch screen identification code from the tag information of the first RFID tag into the preset limit information table. The preset limit information table includes the touch screen identification code, trigger time, total number of triggers, abnormal time, and last maintenance time. The cabinet PLC then sends a display instruction to each display device in the first display device group, sends a start instruction to the integrated fault alarm buzzer, and simultaneously issues a control command to at least one response component in the second response component group. In practice, the first display device group includes the first touch screen and the second touch screen. The second response component group includes the inverter and the main power circuit breaker. The display instruction may include the touch screen identification code and the trigger time. The display command displays the iron contact identification code and trigger time on the first and second touch screens, allowing personnel to determine the location of the triggered iron contact. The control command can be a shutdown command, used to stop the inverter or main power circuit breaker to prevent equipment damage. Thus, through the combined limit verification strategy, accurate identification of the limit switch triggering status is achieved.

[0103] The comprehensive limit warning strategy is as follows: If the cabinet PLC detects the tag information of the first RFID tag but does not detect that the first limit switch has been triggered by the first iron contact, and simultaneously receives an infrared signal from the first infrared receiver, it sends a first warning instruction to each display device in the first display device group, sends a start instruction to the comprehensive fault alarm buzzer, and simultaneously issues a control command to at least one response component in the second response component group. Subsequently, the cabinet PLC updates the preset limit information table. Specifically, the cabinet PLC writes the iron contact identification code, trigger time, and abnormal time from the tag information of the first RFID tag into the preset limit information table. In practice, the first warning instruction includes the iron contact identification code and abnormal time. The first warning instruction is used to display the iron contact identification code and abnormal time on the first and second touch screens, allowing personnel to determine the location of the abnormal iron contact. The control instruction can be a shutdown instruction used to stop the inverter or the main power circuit breaker. This avoids missed detections due to damaged iron contacts or poor contact.

[0104] The cabinet PLC will also search the preset limit information table according to the preset detection cycle. Specifically, for each iron-touching identification code, the cabinet PLC first obtains the real-time date and the last maintenance time in the preset limit information table, and performs a difference operation between the real-time date and the last maintenance time, and compares it with the preset maintenance interval. If it is greater than or equal to the preset maintenance interval, a maintenance instruction is sent to each display device in the first display device group. In practice, the maintenance instruction includes the iron-touching identification code and the last maintenance time. The maintenance instruction is used to display the iron-touching identification code and the last maintenance time on the first touch screen and the second touch screen, so that the staff can determine the iron-touching position that needs to be repaired. The preset detection cycle can be 1 day, and the preset maintenance interval can be 5 days. In this way, automatic reminders for iron-touching maintenance are realized, and the efficiency of iron-touching maintenance is improved.

[0105] Subsequently, the cabinet PLC will count the number of occurrences of the trigger time in the preset limit information table according to the preset sampling period, and obtain the periodic iron-touching trigger number. If the periodic iron-touching trigger number is greater than or equal to the preset trigger number threshold, a second early warning instruction will be sent to each display device in the first display device group. In practice, the second early warning instruction includes the trolley number, iron-touching identification code and iron-touching trigger number corresponding to the coke screening building unloading trolley. The second early warning instruction is used to display the trolley number, iron-touching identification code and iron-touching trigger number corresponding to the coke screening building unloading trolley on the first touch screen and the second touch screen, so that the staff can determine the iron-touching position of the iron-touching trigger anomaly and the coke screening building unloading trolley corresponding to the iron-touching trigger. The preset sampling period can be 3 hours, and the preset trigger number threshold can be 5 times. In this way, an early warning is achieved when the iron-touching anomaly is triggered, helping the staff to promptly identify potential faults of the coke screening building unloading trolley.

[0106] The limit switch trigger verification interlock strategy applies to the forward or reverse direction of the coke screening floor unloading trolley track. Since the judgment logic of the limit switch trigger verification interlock strategy in the direction of the first iron contact has been explained, the judgment logic of the limit switch trigger verification interlock strategy in the direction of the second iron contact will not be repeated.

[0107] A contact iron is a mechanical limit device typically installed on rail transport systems (such as the track of the coke screening plant's unloading trolley). It physically triggers a limit switch to detect when the trolley has reached a specific position. RFID is a radio frequency identification technology that uses radio waves to transmit data between RFID tags and RFID readers, enabling automatic identification and data storage.

[0108] In these embodiments, the reliability of the limit detection of the coke screening building unloading trolley is improved, avoiding equipment damage or safety accidents caused by the failure of a single trigger mechanism. Specifically, the preset limit information table is updated using RFID tags to provide a basis for abnormality detection and maintenance; the contact verification of the limit switch and the non-contact verification of the infrared transmitter and infrared receiver are combined to further improve the accuracy of limit detection, ensuring that the coke screening building unloading trolley can stop in time when it exceeds the maximum travel range; at the same time, the cabinet PLC also regularly counts the number of limit triggers, automatically identifies abnormalities and reminds staff to perform maintenance. Not only does it enhance the stability of limit detection, but it can also monitor the status of iron collisions and the coke screening building unloading trolley in real time, optimize maintenance strategies, and reduce safety risks.

[0109] The above descriptions are merely some preferred embodiments of the present invention and illustrate the underlying technical principles. Those skilled in the art should understand that the scope of the present invention is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned inventive concept. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. An electrical automation system for a coke screening building unloading trolley, characterized in that: include: An on-board electric control panel cabinet is provided with a component cavity and a wiring cavity, a terminal block is provided inside the wiring cavity, the terminal block adopts a quick-insert spring self-locking terminal, a plurality of components are provided in the component cavity, and the plurality of components include a frequency converter and a panel PLC; the panel PLC is deployed with a PLC control system, and a plurality of interlocking control strategies are deployed in the PLC control system, including a limit switch trigger verification interlocking strategy, and the limit switch trigger verification interlocking strategy includes a limit joint verification strategy and a limit comprehensive early warning strategy; the on-board electric control panel cabinet is provided with a first touch screen, an emergency stop button on the panel, a main power circuit breaker, a rail clamp release button and a remote control receiver power circuit breaker, and a transparent opening and closing door is provided outside the first touch screen; the on-board electric control panel cabinet is embedded in an ordinary cabinet, and the ordinary cabinet is installed on the unloading trolley of the coke screening building; A ground signal transfer box, the ground signal transfer box including a second touch screen, the ground signal transfer box being connected to the centralized control device via a first preset connection method, and being connected to the coke screening building unloading trolley via a second preset connection method; Centralized control equipment, the centralized control equipment comprising a first host and a second host, the first host being equipped with a video surveillance system, the second host being equipped with a centralized control system; the centralized control equipment being connected to the ground signal transfer box via the first preset connection method, and being connected to the coke screening building unloading trolley via the second preset connection method; a plurality of vehicle-mounted components including a first RFID reader, a second RFID reader, a first infrared receiver, and a second infrared receiver; The peripheral equipment includes a first RFID tag, a second RFID tag, a first infrared transmitter, a second infrared transmitter, a first contact iron, and a second contact iron; the first infrared receiver and the first RFID reader are installed at the front end of the unloading trolley of the coke screening building; The second infrared receiver and the second RFID reader are installed at the rear end of the coke screening building unloading trolley; the first infrared transmitter, the first contact iron, the first RFID tag, the second infrared transmitter, the second contact iron, and the second RFID tag are installed at both ends of the track of the coke screening building unloading trolley; when the coke screening building unloading trolley moves forward, it passes the first RFID tag, the first contact iron, and the first infrared transmitter in sequence; when the coke screening building unloading trolley moves backward, it passes the second RFID tag, the second contact iron, and the second infrared transmitter in sequence; The limit joint verification strategy is: if the cabinet PLC receives the tag information of the first RFID tag, it further determines whether the first limit switch is triggered by the first touch iron, and determines whether the infrared signal of the first infrared receiver is received; if the first touch iron is triggered, and the cabinet PLC receives the infrared signal of the first infrared receiver, the cabinet PLC updates the preset limit information table, and writes the trigger time and the touch iron identification code in the tag information of the first RFID tag into the preset limit information table. The preset limit information table includes the touch iron identification code, trigger time, total number of triggers, abnormal time and last maintenance time; the cabinet PLC sends a display instruction to each display device in the first display device group, the display instruction includes the touch iron identification code and trigger time, and sends a start instruction to the comprehensive fault alarm buzzer, and issues a control command to at least one response component in the second response component group; The comprehensive limit warning strategy is as follows: if the cabinet PLC detects the tag information of the first RFID tag, does not detect that the first limit switch is triggered by the first iron contact, and receives the infrared signal of the first infrared receiver, it sends a first warning instruction to each display device in the first display device group, sends a start instruction to the comprehensive fault alarm buzzer, and sends a control command to at least one response component in the second response component group; the cabinet PLC updates the preset limit information table, writes the iron contact identification code, trigger time, and abnormal time in the tag information of the first RFID tag into the preset limit information table, and the first warning instruction includes the iron contact identification code and abnormal time; the cabinet PLC searches the preset limit information table according to the preset detection cycle, and For each iron-touching identification code, obtain the real-time date and the last maintenance time in the preset limit information table, perform the difference operation between the real-time date and the last maintenance time, and compare them with the preset maintenance interval; if it is greater than or equal to the preset maintenance interval, send a maintenance instruction to each display device in the first display device group, and the maintenance instruction includes the iron-touching identification code and the last maintenance time; according to the preset sampling period, count the number of occurrences of the trigger time in the preset limit information table to obtain the periodic iron-touching trigger number; if the periodic iron-touching trigger number is greater than or equal to the preset trigger number threshold, send a second early warning instruction to each display device in the first display device group, and the second early warning instruction includes the trolley number corresponding to the screening building unloading trolley, the iron-touching identification code and the iron-touching trigger number.

2. The electrical automation system for the coke screening building unloading trolley according to claim 1, characterized in that: The multiple vehicle-mounted components are mounted on the coke screening building unloading trolley, and the multiple vehicle-mounted components also include a position code box signal receiver, a remote control receiver, a radar level meter, a rotary encoder, a blockage switch, a limit switch, a rail clamp release limit switch, an oil pressure switch, an oil pump, a walking sound and light alarm, a comprehensive fault alarm buzzer and a vehicle-mounted emergency stop button; the peripheral equipment also includes multiple position code boxes, and the multiple position code boxes send position correction information to the position code box signal receiver.

3. The electrical automation system for the coke screening building unloading trolley according to claim 2, characterized in that: The multiple interlocking control strategies include at least one of the following: walking action interlocking strategy, rail clamp action control interlocking strategy, emergency stop control strategy, walking speed control strategy, comprehensive fault judgment and its interlocking strategy; The walking action interlocking strategy is as follows: if the PLC control system receives a walking instruction from any device in the first input device group, it determines whether all preset frequency conversion conditions are met, and if all the preset frequency conversion conditions are met, it sends a start instruction to the frequency converter; The rail clamp action control interlocking strategy is as follows: if the PLC control system receives a release command from the rail clamp release button, the PLC control system sends an oil pump start command to the oil pump; when the rail clamp release limit switch detects that the rail clamp has been completely released, or the oil pressure of the oil pump reaches a preset oil pressure threshold, the PLC control system sends a stop command to the oil pump; The emergency stop control strategy is: if the PLC control system receives an emergency stop command from any device in the second input device group, the PLC control system sends a trip command to the main power circuit breaker; The walking speed control strategy is: if the PLC control system receives a walking speed instruction from any device in the third input device group, it sends a speed adjustment instruction to at least one response component in the first response component group; The comprehensive fault judgment interlocking strategy is: if the PLC control system receives a fault instruction from any device in the fourth input device group, it sends a display instruction to each display device in the first display device group according to the fault instruction, sends a start instruction to the comprehensive fault alarm buzzer, and sends a control instruction to at least one response component in the second response component group.

4. The electrical automation system for the coke screening building unloading trolley according to claim 1, characterized in that: The installation scheme corresponding to the inverter is the first inverter installation scheme or the second inverter installation scheme; the first inverter installation scheme is: installing the inverter in the component cavity, and embedding the heat sink on the back of the inverter installation position; the second inverter installation scheme is: installing the inverter in an external inverter cabinet.

5. The electrical automation system for the coke screening building unloading trolley according to claim 1, characterized in that: Also includes: A power adapter box, which is used to supply power to the coke screening building unloading trolley; The installation position corresponding to the power transfer box is determined from a preset power supply scheme, wherein the preset power supply scheme includes the driving distance of the coke screening building unloading trolley and the installation position corresponding to the driving distance.

6. The electrical automation system for the coke screening building unloading trolley according to claim 2, characterized in that: The ordinary cabinet eliminates heat dissipation holes and knock-out holes, and replaces the knock-out holes with explosion-proof through-holes and explosion-proof glands. The corresponding joint treatment measures of the ordinary cabinet are determined from a preset joint treatment measures table; the top of the ordinary cabinet is provided with a sloping eaves that is higher in the front and lower in the back; the cabinet door of the ordinary cabinet is provided with a transparent window.

7. The electrical automation system for the coke screening building unloading trolley according to claim 5, characterized in that: The preset power supply scheme is a first preset power supply scheme or a second preset power supply scheme.

8. The electrical automation system for the coke screening building unloading trolley according to claim 1, characterized in that: The ground signal transfer box also includes a fiber optic transceiver and a wireless communication transceiver; the first preset connection method is a fiber optic connection or a cable connection.

9. The electrical automation system for the coke screening building unloading trolley according to claim 2, characterized in that: The plurality of components further include a thermal relay, a signal isolator, a first network switch and a second network switch; the peripheral devices further include an on-site remote control and a plurality of network cameras.

10. The electrical automation system for the coke screening building unloading trolley according to claim 6, characterized in that: The multiple vehicle-mounted components also include a travel drive component, a drum motor, an oil pump motor and a ground dust removal station; the travel drive component includes a travel motor, a travel motor fan and a travel motor brake.

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