A crown block operation system remote intelligent control switch

Abstract

The utility model relates to electrical installation technical field especially, relates to a kind of intelligent control switch of remote of crown block operating system.It mainly aims at the mechanical key starting mode of traditional crown block, although simple structure, but already unable to meet modern industry to the problem of security, traceability, and proposes the following technical scheme:an intelligent control switch of remote of crown block operating system, including power module, its input end connects the power supply of crown block self, for providing the operating voltage required by system;Wireless communication module is connected with the power module, for carrying out wireless communication with mobile terminal;Actuating mechanism, including relay unit, its control end is connected with the wireless communication module, contact output end is connected with crown block general contactor control loop;Wherein, the wireless communication module receives the control instruction sent by the mobile terminal, after processing, output drive signal controls the action of the actuating mechanism, and the start and stop of crown block are controlled by the on-off of the relay contact.

Description

Technical Field

[0001] This utility model relates to the field of electrical installation technology, and in particular to a remote intelligent control switch for an overhead crane operating system. Background Technology

[0002] Currently, in industrial sectors such as metallurgy, manufacturing, and logistics, overhead cranes (bridge cranes) are an important material handling equipment, and their starting and control methods generally adopt traditional mechanical key switches. Although this method is simple in structure and low in cost, it has gradually revealed many problems in practical applications that are incompatible with the requirements of modern industrial management.

[0003] First, mechanical keys themselves have significant security flaws. Keys are easily copied or obtained without authorization, putting equipment at risk of unauthorized startup and operation, posing a significant threat to safe production. Furthermore, a single mechanical key cannot differentiate access permissions for personnel in different positions (such as operators and maintenance personnel), lacking sophisticated operational authorization management and hindering the implementation of safety responsibility systems.

[0004] Secondly, in terms of management, the mechanical keys are transferred between multiple shifts, making them prone to loss and confusion, increasing the difficulty of daily management and maintenance costs. More importantly, this method completely fails to record when and who operated the equipment, resulting in a lack of transparency and traceability in the operation process. In the event of an operational accident or equipment malfunction, investigation and evidence collection are difficult, and the determination of responsibility is unclear, which is detrimental to improving accident prevention and management levels.

[0005] Therefore, existing mechanical key starting methods have significant shortcomings in terms of security, management efficiency, and traceability. To adapt to the development trends of smart factories and safe production, it is urgent to upgrade existing control methods and develop a new intelligent switch system with functions such as identity recognition, access control, operation recording, and remote control. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of traditional overhead cranes that use mechanical keys for starting. While simple in structure, these methods no longer meet the security and traceability requirements of modern industry. This invention proposes a remote intelligent control switch for the overhead crane operating system, which solves the safety hazards and management deficiencies of the traditional mechanical key starting method. It features operation permission management, status monitoring, and operation traceability functions, significantly improving the safety and management efficiency of overhead crane operation.

[0007] The technical solution of this utility model: a remote intelligent control switch for an overhead crane operating system, comprising... The power module, whose input terminal is connected to the crane's own power supply, is used to provide the operating voltage required by the system; The wireless communication module is connected to the power module and is used for wireless communication with the mobile terminal. The actuator includes a relay unit, the control terminal of which is connected to the wireless communication module, and the contact output terminal of which is connected to the control circuit of the crane's main contactor. The wireless communication module receives control commands sent by the mobile terminal, processes them, and outputs drive signals to control the action of the actuator. The opening and closing of the relay contacts control the start and stop of the crane.

[0008] Furthermore, the power module includes: The input protection circuit is used to connect to the overhead crane power supply, suppress power interference and provide overcurrent and overvoltage protection, and output the protected power supply to the voltage conversion unit. The voltage conversion unit is used to convert the voltage input from the input protection circuit into multiple voltage levels required for system operation and output it to the output voltage regulator circuit. The output voltage regulator circuit is used to regulate the voltage input to the voltage conversion unit using a linear regulator or a secondary filter circuit. It filters out high-frequency switching noise and ripple through a combination of electrolytic capacitors and ceramic capacitors, providing a stable DC power output.

[0009] Furthermore, the wireless communication module includes: The radio frequency transceiver unit is used to receive radio frequency signals from the mobile terminal, perform modulation and demodulation, convert high-frequency analog signals into digital signal streams, and send them to the signal processing unit through a high-speed data bus. The signal processing unit is used to receive digital signal streams from the radio frequency transceiver unit, run the TCP / IP protocol stack and proprietary communication protocol, parse the received data packets, extract valid control commands, decode or encode the data, execute the authorization verification logic of the commands, and send the verified control commands to the isolation interface unit through the general interface. The isolation interface unit is connected to the GPIO pin of the signal processing unit and the control terminal of the actuator. It is used to electrically isolate the actuator using opto-isolation and output control signals that are completely electrically independent from the input side. The wireless communication module supports encrypted transmission mechanisms.

[0010] Furthermore, the isolation interface unit includes a light-emitting diode and a phototransistor, which are only optically connected and not electrically connected. The isolation interface unit receives control signals from the signal processing unit, drives the light-emitting diode to emit light, and the phototransistor conducts after being photosensitive, outputting a control signal that is completely electrically independent of the input side.

[0011] Furthermore, the actuator includes a drive circuit, a relay unit, and an arc-extinguishing device. The drive circuit receives a control signal from the wireless communication module, amplifies and isolates it, and then drives the coil of the relay unit. The contacts of the relay unit are connected to the crane control circuit. The arc-extinguishing device is connected in parallel to the contacts of the relay unit to suppress the electric arc generated when the contacts break.

[0012] Furthermore, the connection method of the relay unit contacts includes disconnecting the wiring at both ends of the original mechanical key switch; and connecting the normally open contacts of the relay unit in series to the control circuit of the crane's main contactor.

[0013] Furthermore, it also includes a system shielding enclosure, which is connected to the grounding busbar or metal structure of the crane via a grounding wire or conductive mounting bracket.

[0014] Furthermore, it also includes setting a shielding layer for the conductors transmitting signals in the system. The shielding layer includes a metal wire braid or conductive foil wrapped around the inner core wire, and the outer layer includes an insulating sheath. The shielding layer is connected to the system grounding busbar 360° using shielding clamps or welded wires.

[0015] Furthermore, it also includes a mounting and fixing structure for mounting the housing of the intelligent control switch system on the overhead crane, including spring-loaded buckles or hooks that snap the upper end of the system housing into the back of the guide rail, and the buckle at the lower end locks it onto the guide rail.

[0016] Furthermore, it also includes a heat dissipation structure, including heat sinks and ventilation holes. The outer shell of the power module is tightly attached to the surface of the heat sink or is tightly attached to the surface of the heat sink by thermal grease or thermal pads. The system enclosure has air inlets on the lower or side sides and air outlets on the upper or back sides. The ventilation holes form airflow channels to carry away the heat accumulated inside through convection.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. Enhanced safety: The intelligent control switch is designed with multiple safety protection systems, allowing for the start and stop of each crane via a mobile app; real-time monitoring and control are implemented without the need for keys. Once the task is completed, the corresponding permissions are revoked, achieving refined management; compared to traditional mechanical start-up methods, this method facilitates auditing and accident accountability, significantly improving operational safety.

[0018] 2. Significant economic benefits are achieved by directly reducing the purchase and maintenance costs of mechanical keys and related locks, and avoiding downtime losses due to lost or damaged keys. The system's hardware structure is rationally designed, easy to install and maintain, and reduces subsequent maintenance costs. In terms of preventative benefits, potential economic losses are avoided by reducing safety accidents and equipment failures. The durability and reliability of the hardware ensure long-term stable and economical operation.

[0019] 3. Improved management efficiency: The modular design of the hardware system enables precise management of operational permissions. Operators at different levels can authenticate their identities via authorized mobile terminals, and the system automatically records operator information, operation time, and other data, solving the problem of untraceable operation records in traditional methods. The data recording unit uses non-volatile memory to ensure the complete preservation of operation logs, providing reliable evidence for accident investigation and liability determination. This hardware-level improvement significantly enhances the standardization and efficiency of equipment management.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a remote intelligent control switch for a crane operating system according to this utility model; Figure 2 This is a schematic diagram of the remote intelligent control switch interaction of this utility model; Figure 3 This is a schematic diagram of the electrical circuit for controlling the overhead crane using a remote intelligent control switch according to this utility model. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0023] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0024] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] Figure 1 The schematic diagram of the remote intelligent control switch of the overhead crane operating system according to this utility model is shown below. Figure 1 As shown, the remote intelligent control switch for the overhead crane operating system of this utility model includes: a power supply module, a wireless communication module, and an actuator. These modules, through optimized circuit connections and mechanical structure coordination, form a complete control system.

[0029] The wireless communication module, connected to the power supply module, is used for wireless communication with mobile terminals. An ESP8266 Wi-Fi module is selected to handle the communication protocol for data transmission. Its interface circuit is connected to the crane's main contactor control circuit to control the crane's start and stop.

[0030] Optionally, the wireless communication module employs an embedded wireless communication unit, supporting standard wireless communication protocols. This module includes a radio frequency transceiver unit, a signal processing unit, and an isolation interface unit. The radio frequency transceiver unit utilizes impedance matching design to ensure signal transmission quality. The signal processing unit is responsible for data encoding / decoding and protocol processing. The isolation interface unit provides connection interfaces with other modules, including power, data, and control interfaces.

[0031] Optionally, the radio frequency transceiver unit is used to receive radio frequency signals from the mobile terminal, perform modulation and demodulation, convert the high-frequency analog signals into digital signal streams, and send them to the signal processing unit through a high-speed data bus.

[0032] The signal processing unit receives digital signal streams from the radio frequency transceiver unit, runs the TCP / IP protocol stack and proprietary communication protocol, parses the received data packets, extracts valid control commands, decodes or encodes the data, executes the authorization verification logic of the commands, and sends the verified control commands to the isolation interface unit through the general interface.

[0033] The isolation interface unit is connected to the GPIO pins of the signal processing unit and the control terminal of the actuator. It is used to electrically isolate the actuator using opto-isolation and output control signals that are completely independent of the input side.

[0034] As an example, the isolation interface unit includes a light-emitting diode and a phototransistor, which are only optically connected and not electrically connected. The isolation interface unit receives control signals from the signal processing unit, drives the light-emitting diode to emit light, and the phototransistor conducts after being exposed to light, outputting control signals that are completely electrically independent of the input side.

[0035] Optionally, the wireless communication module employs an encrypted transmission mechanism, using encryption algorithms to protect data during transmission. The module supports multiple operating modes, including command transmission mode, status reporting mode, and debug mode. In command transmission mode, the module receives control commands sent by the mobile terminal; in status reporting mode, the module periodically sends system status information to the mobile terminal; and in debug mode, it supports system parameter configuration and fault diagnosis.

[0036] The power module, whose input terminal is connected to the crane's own power supply, is used to provide a stable low-voltage power supply (such as AC-DC conversion or battery power), and obtains the corresponding DC24V power supply from the crane.

[0037] Optionally, the power module adopts a multi-stage power processing architecture, including an input protection circuit, a voltage conversion unit, and an output voltage regulator circuit. The input protection circuit includes a common-mode inductor and a high-frequency filter capacitor to suppress electromagnetic interference from the power grid. The voltage conversion unit uses switching power supply technology to convert the DC power supplied by the overhead crane into the operating voltage required by the system. The output voltage regulator circuit uses linear regulators to provide a stable low-voltage DC output.

[0038] Optionally, an input protection circuit is used to connect to the overhead crane power supply to suppress power interference and provide overcurrent and overvoltage protection, and output the protected power supply to the voltage conversion unit.

[0039] The voltage conversion unit is used to convert the voltage input to the input protection circuit into multiple voltage levels required for system operation and output it to the output voltage regulator circuit.

[0040] The output voltage regulator circuit is used to regulate the voltage input to the voltage conversion unit using a linear regulator or a secondary filter circuit. It filters out high-frequency switching noise and ripple through a combination of electrolytic capacitors and ceramic capacitors, providing a stable DC power output.

[0041] Optionally, the power module is equipped with comprehensive protection circuitry, including overcurrent protection, overvoltage protection, and short-circuit protection. Overcurrent protection employs a resettable fuse that automatically cuts off power when the output current exceeds a set value. Overvoltage protection uses a Zener diode and comparator circuitry to monitor the output voltage in real time and activate the protection mechanism in case of abnormalities. All protection circuits are implemented in hardware to ensure timely and reliable protection.

[0042] The actuator includes a relay unit, whose control end is connected to the wireless communication module and whose contact output end is connected to the control circuit of the crane's main contactor. The crane's start and stop are controlled by the opening and closing of the contacts.

[0043] Optionally, the actuator includes a drive circuit, a relay unit, and an arc-extinguishing device. The drive circuit receives control signals from the wireless communication module, amplifies and isolates them, and then drives the coil of the relay unit. The contacts of the relay unit are connected to the crane control circuit. The arc-extinguishing device is connected in parallel to the contacts of the relay unit to suppress the electric arc generated when the contacts break.

[0044] In this embodiment, the actuator employs an electromagnetic relay device, including a coil drive circuit and a contact switch circuit. The coil drive circuit uses an isolated drive method, achieving electrical isolation between the control signal and the drive circuit through an optocoupler. The contact switch circuit uses high-capacity relay contacts, capable of withstanding the operating current and voltage of the crane control circuit.

[0045] In this embodiment, the connection method of the relay unit contacts includes disconnecting the wiring at both ends of the original mechanical key switch; and connecting the normally open contacts of the relay unit in series to the control circuit of the crane's main contactor.

[0046] As an example, the relay device features a vibration-resistant design to ensure reliable operation in industrial environments. The contact material is made of a silver alloy, which has excellent conductivity and wear resistance. The arc-extinguishing device employs a combination of magnetic blowout arc extinguishing and RC absorption to effectively suppress the electric arc generated when the contacts break.

[0047] Optionally, it may also include a status monitoring unit and a data storage unit.

[0048] The status monitoring unit includes a voltage detection circuit, a current detection circuit, and a temperature detection circuit. The voltage detection circuit monitors the power supply voltage in real time, the current detection circuit monitors the load current, and the temperature detection circuit monitors the system operating temperature. All detection signals are processed by the conditioning circuit before being sent to the main control unit.

[0049] Optionally, the indicator unit uses multi-color LED indicators to represent system status through different colors and flashing patterns. These include power status indicators, communication status indicators, operating status indicators, and fault status indicators. The indicator lights use high-brightness devices to ensure clear visibility in industrial environments.

[0050] The data storage unit uses non-volatile memory to store system parameters, operation logs, and fault records. The storage unit has power-loss protection to ensure data is not lost in the event of a power outage. Stored data includes operation time, operator information, and equipment status change records.

[0051] Optionally, the system employs a multi-layered anti-interference design. At the circuit design level, filtering circuits, decoupling circuits, and shielding measures are used. At the PCB layout level, routing is rationally planned to avoid parallel signal lines and reduce crosstalk. At the structural design level, a metal shielded enclosure is used, and critical components are fitted with shielding covers.

[0052] Optionally, the system also includes a system shielding enclosure, which is connected to the grounding bar of the crane or the metal structure body via a grounding wire or a conductive mounting bracket.

[0053] In this embodiment, a shielding layer is also provided for the conductors transmitting signals in the system. The shielding layer includes a metal wire braid or conductive foil wrapped around the inner core wire, and the outer layer includes an insulating sheath. The shielding layer is connected to the system grounding busbar 360° using shielding clamps or welded wires.

[0054] As an example, several anti-interference measures were adopted in terms of hardware layout: all signal transmission lines use RVVP shielded cables, with the shielding layer grounded at one end, and the grounding point is selected at the grounding terminal of the power module; the system casing is made of metal and is well grounded; a ferrite bead and decoupling capacitor are added to the power input terminal of the wireless communication module; a freewheeling diode is connected in parallel across the relay coil to prevent back EMF interference; signal lines are arranged away from the overhead crane power lines, with a minimum distance of more than 20cm.

[0055] Optionally, differential transmission is used for signal transmission to improve common-mode interference immunity. Important signal lines use twisted-pair or shielded cables, with the shielding layer grounded at a single point. Surge protection is installed at the power input to prevent voltage surges from damaging the system.

[0056] Optionally, it also includes a mounting and fixing structure for mounting the housing of the intelligent control switch system on the overhead crane, including a spring-loaded buckle or locking hook that snaps the upper end of the system housing into the back of the guide rail and locks the lower end of the housing onto the guide rail.

[0057] In this embodiment, the system is installed using a standard DIN rail mounting method, facilitating on-site installation and maintenance. The housing is made of engineering plastic material, which is flame-retardant and impact-resistant. The wiring terminals feature an anti-loosening design to ensure reliable connections. All exposed interfaces are waterproof and dustproof, meeting industrial environment protection requirements.

[0058] Optionally, mechanical protection includes vibration and shock protection designs. The circuit board is reinforced and secured, with critical components encapsulated. The housing features mounting damping pads to reduce vibration transmission. Ample wiring space facilitates wiring and maintenance.

[0059] Optionally, the system also includes a heat dissipation structure, including heat sinks and ventilation holes. The power module housing is tightly attached to the surface of the heat sink or is tightly attached to the surface of the heat sink by thermal grease or thermal pads. The system enclosure has air inlets on the lower or side sides and air outlets on the upper or back sides. The ventilation holes form airflow channels to carry away the heat accumulated inside through convection.

[0060] As an example, the system workflow includes the following steps: After power-on, the system first performs a self-test to check the working status of each module. Upon successful self-test, it enters standby mode, waiting for mobile terminal connections. When a valid control command is received, authorization verification and decryption are performed. After successful verification, the corresponding operation is executed, and operation information is recorded. During operation, the system status and crane status are monitored in real time. If any abnormality is detected, the protection mechanism is immediately activated, output is cut off, and fault information is reported. After the operation is completed, the system returns to standby mode, waiting for the next operation command.

[0061] In this embodiment, the system employs a multi-layered safety protection design. Regarding electrical safety, strong and weak currents are isolated, and the isolation voltage meets safety standards. For operational safety, a dual authentication mechanism is used, including identity verification and authorization verification. For data security, encrypted storage and transmission are employed to prevent data leakage.

[0062] Optionally, emergency protection includes an emergency stop function and a fault self-diagnostic function. The emergency stop function can directly cut off the output through hardware circuitry to ensure rapid response in emergencies. The fault self-diagnostic function can detect system faults and record fault information to facilitate troubleshooting by maintenance personnel.

[0063] In this embodiment, the system provides multiple debugging interfaces and maintenance methods. Local debugging can be performed by connecting to debugging tools through a dedicated interface, while remote debugging can be conducted via wireless communication. During maintenance, system logs and status information can be viewed via a mobile terminal, supporting remote fault diagnosis and parameter configuration.

[0064] Optionally, the system supports online firmware upgrades, allowing for wireless program updates. The upgrade process employs a verification mechanism to ensure the integrity and accuracy of the upgrade data. An automatic recovery function is available in case of upgrade failure, guaranteeing system reliability.

[0065] This system is suitable for controlling overhead crane equipment in various industrial environments, and is particularly suitable for applications with high requirements for safety and traceability. The system can be seamlessly integrated with existing overhead crane control systems without requiring large-scale modifications to the original equipment. Installation is simple; just connect the actuator to the overhead crane control loop and configure the relevant parameters to use it.

[0066] In this embodiment, as Figure 2 As shown, after the system is powered on, the power module starts working, providing stable power to all components. The wireless communication module starts and establishes a Wi-Fi hotspot, waiting for mobile terminal connections. Maintenance personnel send crane start / stop commands via a mobile app, and the command data is transmitted to the ESP8266 module via the wireless network. The main control chip ESP8266 module receives the data, and its built-in hardware encryption chip decrypts and verifies the command. After successful verification, the electromagnetic wave signal is converted into an electrical signal for crane start / stop. Then, after decryption and authorization verification, a high / low level drive is output to control the energization and de-energization of the intelligent switch coil (KA1). When the output is high, the relay coil is energized, the normally open contact closes, the crane's main contactor circuit is connected, and the crane starts; when the output is low, the relay coil is de-energized, the contact opens, and the crane stops running. Figure 3 As shown, this fulfills the prerequisites for crane operation. Simultaneously, the start-up time and operator identity are recorded to implement accountability, ensure safety, and reduce the risk of accident investigation. During monitoring, the crane's start-up and stop data are transmitted in real-time to a mobile app via a wireless module, providing real-time feedback on the crane's status and ensuring that crane operators and maintenance personnel can check the crane's status at any time. This improves safety and reduces the probability of accidents.

[0067] As an example, the system monitors the crane status in real time through hardware: a current detection circuit is added to the crane's main contactor circuit to monitor the crane's operating status in real time; a DS1302 clock chip is used to record the operation time; an AT24C series EEPROM chip is used to store the operation log, including information such as operator ID, operation time, and operation type; and status data is periodically sent to the mobile terminal through a wireless communication module.

[0068] As an example, the actual on-site operation includes the following steps: (1) Crane operators need to apply for a crane use work permit, which is then checked by maintenance personnel to ensure it is correct.

[0069] (2) The crane operator uses a mobile terminal to connect to the module and access the APP. The maintenance personnel inform the operator of the precautions in accordance with the requirements of the "Safety Technical Regulations for Lifting Machinery" and sign the crane use responsibility agreement.

[0070] (3) The crane operator remotely controls the crane to start and unlock via a mobile APP, observes the output status of the module serial port, and repeats this three times to ensure the safe operation of the crane.

[0071] (4) The crane operator shall drive the crane in accordance with the provisions of the "Safety Technical Regulations for Lifting Machinery".

[0072] (5) After the crane operator finishes using the crane, they should lock the crane via the APP to ensure that the crane can be used normally next time. After the maintenance personnel confirm that the data monitoring via the mobile APP is correct, they should record the crane user's identity information and the time of use for future reference.

[0073] In this embodiment, during on-site installation, first confirm that the overhead crane power supply is disconnected. Reliably connect the power module input terminal to the overhead crane's DC24V power output terminal, ensuring correct polarity. Connect the relay contacts in series to the overhead crane's main contactor control circuit, ensuring a secure connection. All wiring terminals are waterproof and dustproof, and should be inspected and tested after installation.

[0074] During system debugging, a dedicated debugging tool is used to check the working status of each module to confirm that wireless communication is normal, relay operation is reliable, and status indication is correct.

[0075] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A remote intelligent control switch for an overhead crane operating system, characterized in that, include, The power module, whose input terminal is connected to the crane's own power supply, is used to provide the operating voltage required by the system; The wireless communication module is connected to the power module and is used for wireless communication with the mobile terminal. The actuator includes a relay unit, the control terminal of which is connected to the wireless communication module, and the contact output terminal of which is connected to the control circuit of the crane's main contactor. The wireless communication module receives control commands sent by the mobile terminal, processes them, and outputs drive signals to control the action of the actuator. The opening and closing of the relay contacts control the start and stop of the crane.

2. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, The power module includes: The input protection circuit is used to connect to the overhead crane power supply, suppress power interference and provide overcurrent and overvoltage protection, and output the protected power supply to the voltage conversion unit. The voltage conversion unit is used to convert the voltage input to the input protection circuit into multiple voltage levels required for system operation and output it to the output voltage regulator circuit. The output voltage regulator circuit is used to regulate the voltage input to the voltage conversion unit using a linear regulator or a secondary filter circuit. It filters out high-frequency switching noise and ripple through a combination of electrolytic capacitors and ceramic capacitors, providing a stable DC power output.

3. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, The wireless communication module includes: The radio frequency transceiver unit is used to receive radio frequency signals from the mobile terminal, perform modulation and demodulation, convert high-frequency analog signals into digital signal streams, and send them to the signal processing unit through a high-speed data bus. The signal processing unit is used to receive digital signal streams from the radio frequency transceiver unit, run the TCP / IP protocol stack and proprietary communication protocol, parse the received data packets, extract valid control commands, decode or encode the data, execute the authorization verification logic of the commands, and send the verified control commands to the isolation interface unit through the general interface. The isolation interface unit is connected to the GPIO pin of the signal processing unit and the control terminal of the actuator. It is used to electrically isolate the actuator using opto-isolation and output control signals that are completely electrically independent from the input side. The wireless communication module supports encrypted transmission mechanisms.

4. The remote intelligent control switch for the overhead crane operating system according to claim 3, characterized in that, The isolation interface unit includes a light-emitting diode and a phototransistor, which are only optically connected and not electrically connected. The isolation interface unit receives control signals from the signal processing unit, drives the light-emitting diode to emit light, and the phototransistor conducts after being exposed to light, outputting a control signal that is completely electrically independent of the input side.

5. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, The actuator includes a drive circuit, a relay unit, and an arc-extinguishing device. The drive circuit receives a control signal from the wireless communication module, amplifies and isolates it, and then drives the coil of the relay unit. The contacts of the relay unit are connected to the crane control circuit. The arc-extinguishing device is connected in parallel to the contacts of the relay unit to suppress the electric arc generated when the contacts break.

6. The remote intelligent control switch for the overhead crane operating system according to claim 5, characterized in that, The connection method of the relay unit contacts includes disconnecting the wiring at both ends of the original mechanical key switch; and connecting the normally open contacts of the relay unit in series to the control circuit of the crane's main contactor.

7. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, It also includes a system shielding enclosure, which is connected to the grounding bar or metal structure of the crane via a grounding wire or conductive mounting bracket.

8. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, It also includes setting a shielding layer for the conductors transmitting signals in the system. The shielding layer includes a metal wire braid or conductive foil wrapped around the inner core wire, and the outer layer includes an insulating sheath. The shielding layer is connected to the system grounding busbar 360° using shielding clamps or welded wires.

9. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, It also includes a mounting and fixing structure for mounting the housing of the intelligent control switch system on the overhead crane, including a spring-loaded buckle or hook that snaps the upper end of the system housing into the back of the guide rail and locks the lower end of the housing onto the guide rail.

10. The remote intelligent control switch for the overhead crane operating system according to claim 1, characterized in that, It also includes a heat dissipation structure, including heat sinks and ventilation holes. The outer shell of the power module is tightly attached to the surface of the heat sink or is tightly attached to the surface of the heat sink by thermal grease or thermal pads. The system enclosure has air inlets on the lower or side and air outlets on the upper or back. The ventilation holes form an air flow channel to carry away the heat accumulated inside through convection.

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