Integrated intelligent locking explosion-proof switch and control method thereof

Abstract

The application discloses an integrated intelligent locking explosion-proof switch and a control method thereof. The switch embeds and integrates a lock body, a driving mechanism, a communication module and a controller of an intelligent electronic lock in a body of the explosion-proof switch, instead of externally hanging and reforming. A shell of the switch is provided with a locking limiting hole / lock rod channel, and the body is integrated with a biological recognition module. An electronic lock power supply and a switch control power supply are independent of each other and contain an emergency power supply interface. The control method includes three stages of intelligent power failure and forced locking, safe maintenance, intelligent unlocking and recovery of power supply. Through steps of identity authentication, permission verification, forced locking, state reporting, remote authorization and safety verification, who maintains, who locks, who unlocks and who unlocks are realized. The application solves problems of lack of intelligent management function, complicated lock replacement and non-transparent state of the existing explosion-proof switch, realizes precise identity management and remote monitoring, and improves operation safety and cooperation efficiency.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof switch technology, specifically to an integrated intelligent interlocking explosion-proof switch and its control method. Background Technology

[0002] Explosion-proof switches, as core electrical equipment in flammable and explosive hazardous environments such as coal mines and chemical plants, play a crucial role in circuit switching control and safety isolation. Their operational reliability is directly related to production safety and personnel life protection. With the upgraded implementation of the "Coal Mine Safety Regulations" and related standards such as GB3836.15-2024, stricter requirements have been placed on the safety management of explosion-proof switches, clearly stipulating that the upstream power supply must be disconnected before maintenance and prohibiting unauthorized live-line work.

[0003] Currently, traditional explosion-proof switches rely on a combination of mechanical locking rods and "dual-protection locks" for interlocking, along with manually hung warning signs, to achieve safety control. However, this approach has several unresolved issues in practical applications. First, mechanical interlocking lacks reliability; others can unlock and supply power without special tools, and warning signs are easily detached or ignored, failing to provide effective protection. Second, it only cuts off the power supply to the switch itself, making it difficult to forcibly interlock the upstream power supply. This fails to technically eliminate the risk of unauthorized live maintenance, and many recent underground electric shock and arc burn accidents are related to this. Furthermore, traditional interlocking methods lack identification and access control mechanisms, failing to implement the "whoever cuts off the power, restores the power" maintenance principle. Safety accidents caused by misoperation by non-professionals or poor communication are frequent.

[0004] To address these issues, some companies have attempted to upgrade their systems using external electronic locks, but this approach has significant drawbacks. The lack of flexibility in external components makes it difficult to balance strict control with ease of use. Furthermore, the electronic lock and switch body lack deep integration, resulting in unstable signal transmission. Many also share a power supply with the switch's main power source, leading to lock failure and safety hazards when the main power supply fails. Existing intelligent upgrade solutions include a few products that incorporate simple communication modules or identification functions, but lack a closed-loop design for local logic control and status awareness, making real-time feedback on lock status impossible. The coordination between remote management and local operation is insufficient, with cumbersome permission transfers that are difficult to adapt to real-world work scenarios such as multi-person collaboration and shift changes. Moreover, operation records lack tamper-proof storage and traceability mechanisms, making it impossible to accurately trace responsible personnel and operational processes after an incident. Summary of the Invention

[0005] To address these issues, this invention provides an integrated intelligent interlocking explosion-proof switch and its control method, solving the technical problems of existing explosion-proof switches that rely on manual power supply and shutdown management, lack identity authentication and access control, have opaque status, are cumbersome to replace locks, and are prone to causing personal injury due to misoperation or poor communication.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated intelligent interlocking explosion-proof switch, comprising:

[0007] A switch mechanical structure unit includes a disconnecting switch, a closing actuator, and a locking limit hole. The locking limit hole cooperates with a mechanical locking device to lock the disconnecting switch or the closing actuator. The closing actuator is used to realize the on / off control of the circuit.

[0008] A driving and locking unit, comprising a driving mechanism and a mechanical locking device, wherein the driving mechanism drives the limiting member of the mechanical locking device to extend into or retract from the locking limiting hole;

[0009] The control and sensing unit includes a local controller and a status sensing module. The status sensing module detects the status of the limit member of the mechanical locking device and transmits it to the local controller. The local controller outputs a control signal to the drive mechanism.

[0010] An interaction and communication unit, comprising a biometric module and a communication module, wherein the biometric module transmits operator identification information to the local controller, and the local controller interacts with the management platform through the communication module;

[0011] A safety power supply unit includes an electronic lock power supply and an emergency power supply interface. The electronic lock power supply provides power to the control and sensing unit, the interaction and communication unit, and the drive and locking unit. The emergency power supply interface is used to maintain the operation of the control and sensing unit, the interaction and communication unit, and the drive and locking unit during power outages.

[0012] As a preferred solution for an integrated intelligent interlocking explosion-proof switch, the drive mechanism is connected to the mechanical interlocking device, and the limiting component of the mechanical interlocking device is adapted to the position of the locking limiting hole to achieve forced locking of the disconnecting switch or the closing actuator.

[0013] As a preferred solution for an integrated intelligent interlocking explosion-proof switch, the local controller is electrically connected to the drive mechanism, the status sensing module, the biometric module, the communication module, and the electronic lock power supply to form a signal link for identity authentication, access control, status detection, drive control, and data upload.

[0014] As a preferred solution for an integrated intelligent interlocking explosion-proof switch, the status sensing module includes a micro switch set on the travel path of the limit member and a Hall sensor integrated inside the drive mechanism. The micro switch and the Hall sensor work together to detect the locking and unlocking status of the limit member.

[0015] As a preferred solution for integrated intelligent interlocking explosion-proof switches, the communication module adopts 4G, 5G or Wi-Fi; the power supply of the electronic lock is isolated from the main control power supply of the explosion-proof switch.

[0016] This invention also provides a control method for an integrated intelligent interlocking explosion-proof switch, applied to the aforementioned integrated intelligent interlocking explosion-proof switch, including a forced interlocking process, the specific steps of which are:

[0017] S1: The operator enters biometric information through the biometric module, and the biometric module transmits the biometric information to the local controller;

[0018] S2: The local controller calls the pre-stored permission template, or requests permission verification from the management platform through the communication module, or verifies the permission through the linkage power outage and restoration work ticket and power outage and restoration application; after the verification is successful, the operator's identity and operation time are recorded.

[0019] S3: Manually disconnect the closing actuator and operate the disconnect switch to the set position;

[0020] S4: The status sensing module detects the maintenance position signal of the disconnect switch and feeds the signal back to the local controller;

[0021] S5: The local controller outputs a drive signal to the drive mechanism to control the limit member to extend and embed into the locking limit hole, physically blocking the operating stroke of the isolation switch;

[0022] S6: The status sensing module detects the locking state of the limit component and transmits the status signal to the local controller;

[0023] S7: The local controller uploads information such as the locked status, operator identity, operation time, and disconnect switch location to the management platform through the communication module.

[0024] As a preferred control method for integrated intelligent interlocking explosion-proof switches, it also includes an intelligent unlocking process, the specific steps of which are as follows:

[0025] S8: Initiate an unlock request using any of the following methods:

[0026] The original operator re-entered biometric information into the biometric module, triggering a local unlock request;

[0027] The authorized person enters biometric information into the biometric module, triggering a local unlock request;

[0028] Authorized personnel select the corresponding switch on the mobile terminal, enter the reason for unlocking, and submit a remote authorization command. The remote authorization command is transmitted to the local controller through the management platform and communication module.

[0029] S9: After receiving the unlock request, the local controller verifies the following conditions with the management platform through the communication module:

[0030] The original maintenance task has been marked as completed;

[0031] The permissions of the person who initiated the unlock request are matched with the currently authorized list of switches;

[0032] S10: After the verification is passed, the local controller outputs a retraction signal to the drive mechanism to control the limit member to exit the locking limit hole;

[0033] S11: The status sensing module detects the unlocking status of the limiter and transmits the status signal to the local controller;

[0034] S12: The local controller uploads the unlocked status and unlocking operation record to the management platform through the communication module;

[0035] S13: The operator resets the disconnect switch to the operating position and starts the closing actuator through the closing button or manual closing handle to complete the power supply to the switch.

[0036] As a preferred control method for integrated intelligent interlocking explosion-proof switches, if the verification fails during the intelligent unlocking process, the local controller outputs an unlocking failure signal to the communication module, and the management platform pushes a failure reason prompt to authorized personnel.

[0037] As a preferred control method for integrated intelligent interlocking explosion-proof switches, in the forced interlocking process, if the isolating switch is not operated to the set position, the status sensing module cannot provide a valid position signal, the local controller refuses to output a drive signal, maintains the unlocked state of the limit member, and prompts an error in the handle position through the biometric module.

[0038] As a preferred control method for integrated intelligent interlocking explosion-proof switches, the remote authorization command includes an authorization validity period. If the unlocking operation is not completed before the expiration of the validity period, the local controller automatically clears the temporary authorization information and maintains the locked state of the limit component.

[0039] By linking on-site paper or electronic power outage tickets, the authorized person and the scope of the power outage can be identified, and the results can be compared with the on-site execution status.

[0040] The present invention has the following advantages:

[0041] First, this invention achieves mandatory safety interlocking. Through a dual interlocking design of structure and logic, it eliminates violations such as "not locking or not displaying tags" during operation, and technically avoids personal injury caused by power restoration before maintenance is completed. It is more reliable than traditional external mechanical locks that rely on the self-discipline of personnel.

[0042] Secondly, this invention integrates a biometric module and binds operation permissions to achieve one person, one permission, eliminates the risk of proxy operation and key lending, and ensures traceability of operation records and clarifies work responsibilities.

[0043] Third, this invention enables remote visualization of power outage and restoration status. Through built-in sensors and communication modules, it uploads information such as equipment status and operators to the cloud in real time, solving the problem of lagging information in traditional management and improving control efficiency.

[0044] Fourth, this invention simplifies the collaboration process. Relying on cloud-based permission binding and remote authorization functions, shift handover and multi-person collaboration permission handover can be completed without physical lock replacement, avoiding the cumbersome lock replacement and power supply delays, and improving work collaboration efficiency. Attached Figure Description

[0045] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0046] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0047] Figure 1 This is a schematic diagram of the integrated intelligent interlocking explosion-proof switch provided in an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the control method for the integrated intelligent interlocking explosion-proof switch provided in an embodiment of the present invention. Detailed Implementation

[0049] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] See Figure 1This invention provides an integrated intelligent interlocking explosion-proof switch, comprising:

[0051] The switch mechanical structure unit includes a disconnecting switch, a closing actuator, and a locking limit hole. The locking limit hole cooperates with a mechanical interlocking device to lock either the disconnecting switch or the closing actuator. The closing actuator is used to control the on / off state of the circuit. As a mechanical component for human-machine interaction, the position (operation / maintenance) of the disconnecting switch directly determines whether the circuit is isolated. The closing actuator completes the circuit on / off operation through opening and closing actions, ensuring circuit safety. The locking limit hole, as an adaptation structure for the mechanical interlocking, matches the size and stroke of the limiting component of the mechanical interlocking device. Through physical embedding, it restricts the displacement of the disconnecting switch, ensuring that the handle cannot be arbitrarily operated in the interlocked state, achieving forced isolation at the mechanical level.

[0052] The drive and locking unit includes a drive mechanism and a mechanical locking device. The drive mechanism drives the limiting member of the mechanical locking device to extend into or retract from the locking limiting hole. The drive mechanism can be based on the principle of electromagnetic induction. After receiving an electrical signal from the local controller, it generates an electromagnetic force to drive the internal iron core to move, thereby causing the limiting member of the mechanical locking device to extend or retract. When locking is required, the drive mechanism is energized, generating a suction or thrust force to push the limiting member into the locking limiting hole, achieving locking of the disconnect switch through physical obstruction. When unlocking is required, the drive mechanism is de-energized or energized in reverse, and the limiting member retracts from the locking limiting hole under the action of spring return force or reverse driving force, releasing the constraint on the disconnect switch. This design uses electromechanical conversion to transform the controller's logic commands into physical locking / unlocking actions, ensuring the reliability of the locking action. Alternatively, the drive mechanism can also be a direct-drive motor.

[0053] The control and sensing unit includes a local controller and a state sensing module. The state sensing module detects the state of the limit member of the mechanical locking device and transmits this information to the local controller. The local controller then outputs a control signal to the drive mechanism. A microswitch, based on the principle of mechanical contact, generates an on / off signal reflecting the physical position of the limit member when it extends, retracts, or moves to contact its contact point. A Hall sensor, based on the Hall effect, detects changes in the magnetic field of the drive mechanism, indirectly determining the extension / retraction state of the limit member. These two components complement each other to ensure accurate state detection. The local controller, with its built-in processor and logic control program, receives the detection signal from the state sensing module and combines it with biometric information and cloud commands for comprehensive judgment. It then outputs a drive signal to the drive mechanism according to preset logic, ensuring coordinated and consistent actions of all units.

[0054] The interaction and communication unit includes a biometric module and a communication module. The biometric module transmits operator identity information to the local controller, and the local controller interacts with the management platform through the communication module. Based on the uniqueness of biometric features, the biometric module collects operator fingerprints, iris scans, and other biometric information, extracts and compares features, and converts the identity verification result into an electrical signal that is transmitted to the local controller, ensuring the legitimacy of operation permissions from the source. The communication module uses wireless communication technologies such as 4G, 5G, or Wi-Fi to establish a two-way data channel between the local controller and the management platform: on the one hand, it uploads data such as the switch's lock / unlock status, operator identity, and operation time to the cloud in real time, enabling status visualization; on the other hand, it receives remote authorization and permission update instructions from the cloud, breaking the geographical limitations of traditional switches.

[0055] The safety power supply unit includes an electronic lock power supply and an emergency power supply interface. The electronic lock power supply powers the control and sensing unit, the interaction and communication unit, and the drive and locking unit. The emergency power supply interface maintains the operation of these units during power outages. The electronic lock power supply is isolated from the explosion-proof switch main control power supply, employing an independent power supply circuit design. This prevents main power supply failures, fluctuations, or maintenance outages from affecting the operation of the intelligent interlocking units, ensuring the interlocking status remains intact and authentication can proceed normally. The emergency power supply interface can be connected to an external backup power supply or battery. In extreme power outage scenarios, external power supply maintains the core functions of the control, sensing, communication, and drive units, ensuring the interlocking status remains effective and eliminating safety hazards caused by power outages, guaranteeing uninterrupted interlocking during power outages.

[0056] In this embodiment, the drive mechanism is connected to the mechanical locking device, and the limiting member of the mechanical locking device is adapted to the position of the locking limiting hole to achieve forced locking of the disconnecting switch or the closing actuator.

[0057] Specifically, the drive mechanism and mechanical locking device are rigidly connected to ensure that the driving force can be efficiently transmitted to the limiting component, avoiding lag or failure caused by transmission backlash. The positions of the limiting component and the locking limiting hole are calibrated, and the cross-sectional dimensions and length of the limiting component are strictly matched with the diameter and depth of the locking limiting hole. Furthermore, after extending, the limiting component can be embedded in the travel path or slot of the disconnecting switch, forming physical interference. This structural adaptation design allows the limiting component to withstand a certain amount of external impact after locking. Even if the operator attempts to forcibly move the disconnecting switch, they cannot overcome the physical obstruction of the limiting component, achieving true forced locking and preventing unauthorized operation without locking.

[0058] In this embodiment, the local controller is electrically connected to the drive mechanism, the state perception module, the biometric module, the communication module, and the electronic lock power supply to form a signal link for identity authentication, permission verification, state detection, drive control, and data upload.

[0059] Specifically, the process begins with biometric authentication, where the local controller verifies the identity information and permissions. Next, the status sensing module detects and reports the status of switches and locks. The controller then outputs drive control signals based on the verification results and status information. Finally, the communication module uploads the entire process data to the cloud. Each step is transmitted in real-time via electrical signals, ensuring uninterrupted communication and rapid response. This guarantees that every operation step can be controlled and recorded, forming a closed-loop management system and preventing omissions or violations.

[0060] In this embodiment, the state sensing module includes a micro switch disposed on the travel path of the limiting member and a Hall sensor integrated inside the drive mechanism. The micro switch and the Hall sensor work together to detect the locking and unlocking states of the limiting member.

[0061] Specifically, the microswitch and Hall sensor employ a dual verification mode of mechanical and electromagnetic detection to enhance the reliability of status detection. The microswitch is installed on the extension / retraction path of the limit component. When the limit component is fully extended (locked state) or fully retracted (unlocked state), it presses the spring of the microswitch, causing its contacts to close or open, generating a clear switching signal that directly reflects the physical position of the limit component. The Hall sensor is integrated into the drive mechanism. When the drive mechanism is energized and drives the limit component to move, its internal magnetic field undergoes a regular change. The Hall sensor senses this change and outputs a corresponding voltage signal, indirectly determining the movement state of the limit component. The two signals corroborate each other. If one sensor fails, the other can serve as a backup, preventing interlocking failures or misoperations due to status detection errors and ensuring the accuracy and redundancy of status feedback.

[0062] In this embodiment, the communication module uses 4G, 5G, or Wi-Fi; the power supply of the electronic lock is isolated from the main control power supply of the explosion-proof switch.

[0063] Specifically, the communication module utilizes mature wireless communication technologies such as 4G, 5G, or Wi-Fi to adapt to different network environments in various application scenarios. 4G / 5G technology offers wide coverage and strong anti-interference capabilities, making it suitable for scenarios with weak network signals, such as underground coal mines and remote chemical industrial parks. Wi-Fi technology boasts high transmission speeds and low cost, making it suitable for environments with good network coverage, such as within factory areas, ensuring stable communication between the switch and the cloud. The electronic lock power supply and the main control power supply employ an electrical isolation design. Physical isolation of the power circuit is achieved through components such as isolation transformers and optocouplers, preventing voltage fluctuations, harmonic interference, or short circuits in the main control power supply from affecting the stability of the electronic lock power supply. Simultaneously, it prevents faults in the electronic lock power supply from being transmitted to the main control circuit, ensuring the safety and independence of the switch electrical system and ensuring that the intelligent interlocking function is unaffected by the main power supply status.

[0064] See Figure 2 This invention also provides a control method for an integrated intelligent interlocking explosion-proof switch, applied to the integrated intelligent interlocking explosion-proof switch described above, including a forced interlocking process, the specific steps of which are as follows:

[0065] S1: The operator enters biometric information through the biometric module, which transmits the biometric information to the local controller. As the first line of defense for identity verification, the biometric module collects the operator's biometric features, such as fingerprints and iris images, using sensors. It preprocesses and extracts features from the collected biometric information, converting it into a computer-recognizable digital feature code before transmitting it to the local controller. Step S1, based on the uniqueness and non-replicability of biometric features, ensures that only pre-authorized operators can initiate subsequent operations, preventing unauthorized personnel from misoperating at the source.

[0066] S2: The local controller invokes a pre-stored permission template, requests permission verification from the management platform via the communication module, or applies for permission verification via a power outage / restoration work order and power outage / restoration application. Upon successful verification, the operator's identity and operation time are recorded. The local controller selects the permission verification method based on the actual application scenario. Locally stored permission templates are suitable for scenarios with poor network signals; the local controller directly compares the received biometric code with the authorization template in the local secure storage unit to quickly complete the verification. Cloud verification is suitable for scenarios requiring real-time permission updates; biometric information is uploaded to the management platform via the communication module and compared with the platform's stored permission database to ensure the real-time nature of permission information. After successful verification, the local controller automatically records the operator's identity and operation start time, forming initial data for operation traceability and providing a basis for accountability.

[0067] S3: Manually disconnect and close the actuator, and operate the isolating switch to the set position. After being authorized, the operator manually disconnects the actuator to cut off the main circuit current, achieving initial power disconnection; then, the isolating switch is switched to the set position, so that the isolating switch is in the fully open state, forming a clear circuit isolation point. The manual operation method conforms to traditional operating habits, ensuring that the operator can intuitively confirm the circuit disconnection status. Only when the handle is in the set position can the locking mechanism effectively lock.

[0068] S4: The status sensing module detects the maintenance position signal of the disconnect switch and feeds the signal back to the local controller. The status sensing module detects the handle position through a position sensor linked to the disconnect switch. When the handle is switched to the set position, the sensor contact activates, generating a corresponding position signal and transmitting it to the local controller. The purpose of step S4 is to confirm that the circuit has achieved physical isolation, providing the necessary conditions for the controller to issue a locking command, avoiding locking failure due to the handle not being in the correct position, and ensuring that the locking action is based on the safe isolation of the circuit.

[0069] S5: The local controller outputs a drive signal to the drive mechanism, controlling the limit member to extend and embed into the locking limit hole, physically blocking the operating stroke of the disconnect switch. After confirming the legality of the identity and the position of the handle, the local controller outputs a drive current signal of specific amplitude and direction to the drive mechanism according to preset logic. Upon receiving the signal, the drive mechanism generates electromagnetic force, driving the limit member of the mechanical locking device to extend and embed into the preset locking limit hole. The limit member and the mechanical structure of the disconnect switch form physical interference, restricting any displacement of the handle and achieving forced locking. Step S5 converts the electrical control command into a mechanical locking action, ensuring that the mandatory safety requirement of the power outage procedure cannot be completed without locking.

[0070] S6: The status sensing module detects the locked state of the limit switch and transmits the status signal to the local controller. After the limit switch extends, the microswitch of the status sensing module is pressed, and the Hall sensor detects the stable magnetic field state of the drive mechanism. Both output a locking status signal to the local controller. After receiving the signal, the controller confirms that the locking action has been successfully completed, avoiding false locking states caused by malfunctions such as the limit switch not extending fully. This provides accurate information for status reporting and ensures the authenticity and reliability of the locking status.

[0071] S7: The local controller uploads the locked status, operator identity, operation time, and isolating switch location information to the management platform via the communication module. The local controller packages and encrypts the locked status, operator identity, operation timestamp, and isolating switch location data, and sends it to the management platform via the communication module. After receiving the data, the cloud platform updates the switch status view in the system, marking the switch as "locked" and associating it with operator information, achieving "lock visualization in the cloud." Step S7 enables managers to monitor the switch status and operation in real time, solving the problem of information lag in traditional management and improving control efficiency and transparency.

[0072] This embodiment also includes a smart unlocking process, the specific steps of which are as follows:

[0073] S8: Initiate an unlock request using any of the following methods:

[0074] The original operator re-entered biometric information into the biometric module, triggering a local unlock request;

[0075] The authorized person enters biometric information into the biometric module, triggering a local unlock request;

[0076] Authorized personnel select the corresponding switch on the mobile terminal, enter the reason for unlocking, and submit a remote authorization command. The remote authorization command is transmitted to the local controller through the management platform and communication module.

[0077] Specifically, the unlock request is configured with dual paths to adapt to different operational scenarios. Local unlocking by the original operator is based on identity verification, requiring the re-entry of biometric information to ensure the unlocking operation is initiated by the original person responsible for the power outage, adhering to the principle of "whoever caused the power outage is responsible for restoring power." Remote authorized unlocking is suitable for shift handover, multi-person collaboration, and other scenarios. Authorized personnel initiate authorization via mobile terminal, and the command is transmitted to the local controller after review by the cloud platform, eliminating the need for on-site lock replacement and simplifying the collaboration process. Entering the unlocking reason provides more comprehensive information for operation traceability, facilitating management and verification.

[0078] S9: After receiving the unlock request, the local controller verifies the following conditions with the management platform through the communication module:

[0079] The original maintenance task has been marked as completed;

[0080] The permissions of the person who initiated the unlock request match the authorized list of the current switch.

[0081] Specifically, upon receiving an unlock request, the local controller initiates dual security checks to ensure the security of the unlocking operation. The maintenance task completion status check queries the progress marker of the corresponding maintenance task through the management platform. Only when the task is fully completed can the unlocking prerequisite be met, preventing accidental power-on when maintenance is incomplete. The authorization matching check confirms that the identity and permissions of the person initiating the unlocking operation match the authorized list of the switch, preventing unauthorized personnel from initiating unlocking. This dual verification mechanism controls the process from both task status and personnel permissions, minimizing the security risks of unlocking operations.

[0082] S10: After the verification is passed, the local controller outputs a retraction signal to the drive mechanism to control the limit member to exit the locking limit hole.

[0083] Specifically, after both verifications pass, the local controller outputs a reverse drive signal to the drive mechanism or cuts off the drive current. The drive mechanism loses its electromagnetic force, and the limit switch, under the action of the return spring, disengages from the locking limit hole, releasing its physical obstruction to the isolating switch. This step ensures that the unlocking action is performed only when safety conditions are met, avoiding mis-locking when verification fails, and guaranteeing the accuracy and safety of the unlocking operation.

[0084] S11: The status sensing module detects the unlocked state of the limiter and transmits the status signal to the local controller.

[0085] Specifically, after the limit switch retracts from the locking hole, the microswitch of the status sensing module resets, and the Hall sensor detects a change in the magnetic field. Both output an unlock status signal to the local controller. Upon receiving the signal, the controller confirms that the unlocking action has been successfully completed, providing a safe prerequisite for subsequent power restoration operations and preventing the handle from being obstructed or the mechanical structure from being damaged due to the limit switch not being fully retracted.

[0086] S12: The local controller uploads the unlocked status and unlocking operation record to the management platform through the communication module.

[0087] Specifically, the local controller packages and encrypts information such as unlock status, unlocking personnel identity, unlocking time, and unlocking method, and then uploads it to the management platform via the communication module. The cloud platform updates the switch status view, records complete information about the unlocking operation, and forms an immutable operation log, providing a basis for subsequent accountability and process verification, and ensuring the traceability of the entire power outage and restoration process.

[0088] S13: The operator resets the disconnect switch to the operating position and starts the closing actuator through the closing button or manual closing handle to complete the power supply to the switch.

[0089] Specifically, after unlocking, the operator manually resets the isolating switch from the set position to the operating position, restoring the circuit connection. Then, by pressing the closing button or using the manual closing handle, the switch is energized, connecting the main circuit current and restoring power supply. This manual operation method ensures that the operator can directly confirm the switch status, avoiding the risks that may arise from automatic power restoration, while also complying with standard electrical work procedures to ensure the safety and reliability of power restoration.

[0090] In this embodiment, if the verification fails during the intelligent unlocking process, the local controller outputs an unlocking failure signal to the communication module, and the management platform pushes a failure reason prompt to the authorized personnel.

[0091] Specifically, if the maintenance task is not completed or the unlocking personnel's permissions do not match, the local controller determines that the verification has failed and outputs an unlocking failure signal to the communication module. The communication module uploads the failure signal and the reason for the failure to the management platform, and the platform pushes a notification message to authorized personnel via mobile terminal. This design allows authorized personnel to know the specific reason for the unlocking failure in a timely manner, enabling them to complete the maintenance task or adjust permissions accordingly, avoiding the waste of time caused by blindly attempting to unlock, and improving work efficiency and safety.

[0092] In this embodiment, during the forced locking process, if the isolating switch is not operated to the set position, the status sensing module cannot provide a valid position signal, the local controller refuses to output a drive signal, maintains the unlocked state of the limiter, and prompts an error in the handle position through the biometric module.

[0093] Specifically, when the isolating switch is not in position, the position sensor of the status sensing module cannot generate a valid signal, the local controller does not receive valid position feedback, and the determination circuit has not achieved safe isolation. At this time, it refuses to output a locking drive signal to the drive mechanism, and the limit device remains in the unlocked state. Simultaneously, the controller outputs a prompt signal to the biometric module, notifying the operator of "handle position error" through the module's display interface or audible and visual alarm function, guiding them to operate correctly. This design ensures that the locking action is only performed after the circuit is safely isolated through logical interlocking, avoiding locking failure due to the handle not being in position, and enforcing standardized operating procedures from a process perspective.

[0094] In this embodiment, the remote authorization command includes an authorization validity period. If the unlocking operation is not completed before the expiration of the validity period, the local controller automatically clears the temporary authorization information and maintains the locked state of the limit device. It also identifies the authorized person and the power outage area through on-site paper or electronic power outage tickets and compares the results with the on-site execution status.

[0095] Specifically, the remote authorization command sets an authorization validity period to avoid security risks caused by prolonged periods of authorization without unlocking. Upon receiving the remote authorization command, the local controller stores the authorization information and the validity period together in a temporary storage unit. If the unlocking operation is not completed within the validity period, the controller automatically clears the temporary authorization information, ceases to respond to unlocking requests based on that authorization, and the limit switch remains locked. This design ensures the timeliness of remote authorization, prevents unauthorized unlocking risks that may arise from prolonged authorization information validity, and improves the security and flexibility of remote control.

[0096] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An integrated intelligent interlocking explosion-proof switch, characterized in that, include: A switch mechanical structure unit includes a disconnecting switch, a closing actuator, and a locking limit hole. The locking limit hole cooperates with a mechanical locking device to lock the disconnecting switch or the closing actuator. The closing actuator is used to realize the on / off control of the circuit. A driving and locking unit, comprising a driving mechanism and a mechanical locking device, wherein the driving mechanism drives the limiting member of the mechanical locking device to extend into or retract from the locking limiting hole; The control and sensing unit includes a local controller and a status sensing module. The status sensing module detects the status of the limit member of the mechanical locking device and transmits it to the local controller. The local controller outputs a control signal to the drive mechanism. An interaction and communication unit, comprising a biometric module and a communication module, wherein the biometric module transmits operator identification information to the local controller, and the local controller interacts with the management platform through the communication module; A safety power supply unit includes an electronic lock power supply and an emergency power supply interface. The electronic lock power supply provides power to the control and sensing unit, the interaction and communication unit, and the drive and locking unit. The emergency power supply interface is used to maintain the operation of the control and sensing unit, the interaction and communication unit, and the drive and locking unit during power outages.

2. The integrated intelligent interlocking explosion-proof switch according to claim 1, characterized in that, The drive mechanism is connected to the mechanical locking device, and the limiting member of the mechanical locking device is adapted to the position of the locking limiting hole to achieve forced locking of the disconnecting switch or the closing actuator.

3. The integrated intelligent interlocking explosion-proof switch according to claim 1, characterized in that, The local controller is electrically connected to the drive mechanism, the status sensing module, the biometric module, the communication module, and the electronic lock power supply to form a signal link for identity authentication, permission verification, status detection, drive control, and data upload.

4. The integrated intelligent interlocking explosion-proof switch according to claim 1, characterized in that, The state sensing module includes a micro switch disposed on the travel path of the limit member and a Hall sensor integrated inside the drive mechanism. The micro switch and the Hall sensor work together to detect the locked and unlocked states of the limit member.

5. The integrated intelligent interlocking explosion-proof switch according to claim 1, characterized in that, The communication module uses 4G, 5G or Wi-Fi; the power supply of the electronic lock is isolated from the main control power supply of the explosion-proof switch.

6. A control method for an integrated intelligent interlocking explosion-proof switch, applied to the integrated intelligent interlocking explosion-proof switch according to any one of claims 1-5, characterized in that, This includes a mandatory locking procedure, the specific steps of which are as follows: S1: The operator enters biometric information through the biometric module, and the biometric module transmits the biometric information to the local controller; S2: The local controller calls the pre-stored permission template, or requests permission verification from the management platform through the communication module, or verifies the permission through the linkage power outage and restoration work ticket and power outage and restoration application; after the verification is successful, the operator's identity and operation time are recorded. S3: Manually disconnect the closing actuator and operate the disconnect switch to the set position; S4: The status sensing module detects the maintenance position signal of the disconnect switch and feeds the signal back to the local controller; S5: The local controller outputs a drive signal to the drive mechanism to control the limit member to extend and embed into the locking limit hole, physically blocking the operating stroke of the isolation switch; S6: The status sensing module detects the locking state of the limit component and transmits the status signal to the local controller; S7: The local controller uploads information such as the locked status, operator identity, operation time, and disconnect switch location to the management platform through the communication module.

7. The control method for an integrated intelligent interlocking explosion-proof switch according to claim 6, characterized in that, It also includes a smart unlocking process, the specific steps of which are: S8: Initiate an unlock request using any of the following methods: The original operator re-entered biometric information into the biometric module, triggering a local unlock request; The authorized person enters biometric information into the biometric module, triggering a local unlock request; Authorized personnel select the corresponding switch on the mobile terminal, enter the reason for unlocking, and submit a remote authorization command. The remote authorization command is transmitted to the local controller through the management platform and communication module. S9: After receiving the unlock request, the local controller verifies the following conditions with the management platform through the communication module: The original maintenance task has been marked as completed; The permissions of the person who initiated the unlock request are matched with the currently authorized list of switches; S10: After the verification is passed, the local controller outputs a retraction signal to the drive mechanism to control the limit member to exit the locking limit hole; S11: The status sensing module detects the unlocking status of the limiter and transmits the status signal to the local controller; S12: The local controller uploads the unlocked status and unlocking operation record to the management platform through the communication module; S13: The operator resets the disconnect switch to the operating position and starts the closing actuator through the closing button or manual closing handle to complete the power supply to the switch.

8. The control method according to claim 7, characterized in that, In the intelligent unlocking process, if the verification fails, the local controller outputs an unlocking failure signal to the communication module, and the management platform pushes a failure reason prompt to the authorized personnel.

9. The control method according to claim 6, characterized in that, During the forced locking process, if the isolating switch is not operated to the set position, the status sensing module cannot provide a valid position signal, the local controller refuses to output a drive signal, maintains the unlocked state of the limiter, and prompts an error in the handle position through the biometric module.

10. The control method according to claim 7, characterized in that, The remote authorization command includes an authorization validity period. If the unlocking operation is not completed before the expiration of the validity period, the local controller will automatically clear the temporary authorization information and maintain the locked state of the limit piece. By linking on-site paper or electronic power outage tickets, the authorized person and the scope of the power outage can be identified, and the results can be compared with the on-site execution status.

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