Intelligent maintenance warning locking device

Abstract

This utility model discloses an intelligent maintenance warning interlocking device, installed at the top of a power distribution cabinet. The power distribution cabinet has operating and maintenance states. The intelligent maintenance warning interlocking device includes a housing, a display screen, a projection lamp, and an interlocking assembly. The display screen shows a warning sign along the front of the cabinet, while the projection lamp projects the same warning sign onto the ground in front of the cabinet. The interlocking assembly includes a drive unit and a locking pin installed inside the housing. The drive unit can drive the locking pin to extend and retract. In the operating state, the warning sign is an operating sign, and the locking pin extends from the housing to stop the cabinet door from opening outward. In the maintenance state, the warning sign is a maintenance sign, and the locking pin retracts into the housing to release the door's obstruction. This utility model's technical solution is beneficial for clearly and directly indicating the cabinet's operating status and updating the cabinet status information in a timely manner, improving maintenance efficiency, preventing the cabinet door from opening in the operating state, and preventing power accidents.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to an intelligent maintenance warning interlocking device. Background Technology

[0002] During the operation and maintenance of power systems, the working status of control cabinets needs to be clearly marked to avoid safety hazards caused by misoperation. Currently, warning signs are typically displayed manually. However, this method suffers from problems such as signs being easily flipped or detached, and information not being updated in a timely manner, leading to unclear or incorrect status indications. This hinders operator maintenance and may cause safety accidents. Utility Model Content

[0003] This utility model provides an intelligent maintenance warning and interlocking device, which can clearly and directly indicate the working status of the cabinet and facilitate timely updates of the cabinet's status information. This can improve maintenance efficiency and safety, prevent the cabinet door from being opened while in operation, and avoid the occurrence of power accidents.

[0004] This utility model embodiment provides an intelligent maintenance warning interlocking device, which is installed at the top of a power distribution cabinet. The power distribution cabinet has operating and maintenance states. The intelligent maintenance warning interlocking device includes: a housing, a display screen, a projection lamp, and an interlocking assembly. The display screen and the projection lamp are respectively embedded in the housing. The display screen displays warning signs along the front of the cabinet, while the projection lamp projects the same warning signs onto the ground in front of the cabinet. The warning signs include operating and maintenance signs. The interlocking assembly includes a drive unit and a locking pin installed in the housing. The drive unit can drive the locking pin to extend and retract. In the operating state, the warning sign is the operating sign, and the locking pin extends from the housing to stop the cabinet door from opening outward. In the maintenance state, the warning sign is the maintenance sign, and the locking pin retracts into the housing to release the stop on the cabinet door.

[0005] This utility model's technical solution incorporates a display screen, a projection lamp, and a locking component. The display screen promptly shows warning signs, and the projection lamp projects the same warning signs onto the ground in front of the cabinet. This eliminates the need for manual labeling, providing a clear and direct indication of the cabinet's operational status and facilitating timely updates to the cabinet's status information. The display screen and projection lamp's guidance help maintenance personnel quickly locate the object to be repaired and reach the repair area, preventing them from going to the wrong section and saving search time. In operation, the locking pin extends from the housing to prevent the cabinet door from opening outwards; in maintenance mode, the locking pin retracts into the housing to release the door's obstruction, effectively preventing the door from opening during operation, thus improving maintenance efficiency and safety, and preventing electrical accidents.

[0006] According to the aforementioned embodiment of this utility model, the locking component is disposed on the side near the opening of the cabinet door. In operation, a stop surface is formed on the side of the locking pin facing the cabinet door. The stop surface is parallel to the cabinet door and forms a limiting gap with the cabinet door to prevent the cabinet door from opening. This utility model's technical solution, by providing a locking component, helps prevent the cabinet door from opening in operation, improves maintenance efficiency and safety, and avoids electrical accidents.

[0007] According to any of the foregoing embodiments of the present invention, the locking component is an electromagnetic lock, which includes a drive motor and a locking pin. The drive motor drives the locking pin to extend and retract through gear meshing.

[0008] According to the aforementioned embodiments of this utility model, the locking pin can maintain a power-off self-locking state through the drive unit when it extends or retracts. The locking component in this utility model has a bistable structure, which can maintain a locked state after power is applied or de-energized, without the need for continuous power supply. This is beneficial to improving the safety and reliability of power maintenance and meets the requirements of energy conservation and environmental protection.

[0009] According to the aforementioned embodiments of this utility model, the end of the locking pin is provided with a pushing surface; the intelligent maintenance warning locking device has an emergency unlocking state. In the emergency unlocking state, pressing the pushing surface drives the locking pin to retract into the housing to release the door stop limit of the power panel cabinet. The technical solution of this utility model, by providing a pushing surface, facilitates the retraction of the locking pin into the housing to unlock the cabinet door in the emergency unlocking state.

[0010] According to the aforementioned embodiments of this utility model, the driving unit includes a solenoid and an iron core. When the solenoid is de-energized, it drives the iron core to extend, and when the solenoid is energized, it drives the iron core to retract.

[0011] According to the aforementioned embodiments of this utility model, the projection lamp includes a running lamp and a maintenance lamp arranged side-by-side in the middle area of ​​the bottom of the housing, with the optical axes of the running lamp and the maintenance lamp tilted downwards. In operation, the running lamp projects an operation marker onto the ground in front of the cabinet; and / or, in maintenance mode, the maintenance lamp projects a maintenance marker onto the ground in front of the cabinet. This utility model's technical solution, through the light guidance of the running lamp and the maintenance lamp, facilitates maintenance personnel in quickly locating the object to be maintained and reaching the maintenance area, preventing them from going to the wrong section and saving search time.

[0012] According to the aforementioned embodiments of this utility model, the housing is elongated, and the bottom surface of the housing is flush with the bottom of the power distribution cabinet's header. The back of the housing extends laterally along the header of the power distribution cabinet via a bracket; alternatively, the back of the housing extends laterally along the header of the power distribution cabinet via magnetic attraction.

[0013] According to the aforementioned embodiments of this utility model, the intelligent maintenance warning interlocking device also includes a control unit, which controls the display screen, projection lamp, and interlocking components to synchronously switch working states.

[0014] According to the aforementioned embodiments of this utility model, the control unit is communicatively connected to the maintenance and error prevention system of the control cabinet and receives status display information sent by the maintenance and error prevention system. This utility model's technical solution establishes a communicative association between the control unit and the maintenance and error prevention system of the control cabinet. The maintenance and error prevention system can transmit operating signals and maintenance signals to the control unit according to different states of the control cabinet. The control unit can respond to the signal commands of the maintenance and error prevention system, which is beneficial for realizing the electronic deployment of safety measures. The display content of the screen, the projection content of the projection lamp, and the locking status of the locking components can all be controlled through the maintenance and error prevention system, forcibly associated with the task, and preventing incorrect or missed manual tagging.

[0015] This utility model's technical solution, by incorporating a display screen, projection light, interlocking components, and a control unit, and communicating with the cabinet's maintenance and error prevention system, facilitates remote real-time control and electronic deployment of safety measures. It also provides clear and direct prompts and timely updates on the cabinet's operational status. The display screen and projection light guide maintenance personnel to quickly locate the object to be repaired and reach the repair area, preventing them from going to the wrong section and saving search time. The interlocking components, linked to the cabinet's status, prevent the cabinet door from opening while the cabinet is running, providing an error-prevention interlocking function and further preventing maintenance personnel from going to the wrong section, thus improving the safety and efficiency of power maintenance. This utility model's technical solution can deploy multiple cabinets simultaneously, achieving omnidirectional guidance from top to bottom. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the intelligent maintenance warning interlocking device of this utility model;

[0018] Figure 2 This is a front view of an embodiment of the intelligent maintenance warning and interlocking device of this utility model applied to a cabinet;

[0019] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the intelligent maintenance warning interlocking device of this utility model;

[0020] Figure 4 This is a schematic diagram of the locking component of an embodiment of the intelligent maintenance warning interlocking device of this utility model;

[0021] Figure 5 This is a schematic diagram of the locking pin when the cabinet is in operation, according to one embodiment of the intelligent maintenance warning interlocking device of this utility model;

[0022] Figure 6 This is a top view of the intelligent maintenance warning and interlocking device of this utility model, in which the running light projects onto the ground in front of the cabinet to indicate the operating status of the cabinet.

[0023] Figure 7 This is a schematic diagram of the cabinet in maintenance status in one embodiment of the intelligent maintenance warning and interlocking device of this utility model;

[0024] Figure 8 This is a top view of an embodiment of the intelligent maintenance warning and interlocking device of this utility model, showing the maintenance light projecting onto the ground in front of the cabinet to indicate the maintenance status of the cabinet.

[0025] Explanation of icon numbers:

[0026] Intelligent maintenance warning interlock device-100, power switch cabinet-200;

[0027] Housing-110, display screen-120, projection lamp-130, locking assembly-140, control unit-150, maintenance error prevention system-210, cabinet door-220;

[0028] Operation light-131, inspection light-132, locking pin-141, drive unit-142;

[0029] Stop surface -1411, push surface -1412.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] This utility model provides an intelligent maintenance warning and interlocking device, which can clearly and directly indicate the working status of the cabinet and facilitate timely updates of the cabinet's status information. This can improve maintenance efficiency and safety, prevent the cabinet door from being opened while in operation, and avoid the occurrence of power accidents.

[0035] like Figures 1 to 3 As shown, this embodiment of the utility model provides an intelligent maintenance warning interlock device 100. The intelligent maintenance warning interlock device 100 is disposed at the top edge of a power distribution cabinet 200, which has both operating and maintenance states. The intelligent maintenance warning interlock device 100 includes: a housing 110, a display screen 120, a projection lamp 130, and an interlocking assembly 140. The display screen 120 and the projection lamp 130 are respectively embedded in the housing 110. The display screen 120 displays warning signs along the front of the cabinet 200, while the projection lamp 130 projects the same warning signs onto the ground in front of the cabinet 200. The warning signs include operating and maintenance signs. Figure 4 As shown, the locking assembly 140 includes a drive unit 142 and a locking pin 141 installed within the housing 110. The drive unit 142 can drive the locking pin 141 to perform telescopic movement; as Figures 5 to 8 As shown, in the operating state, the warning sign is the operating sign, and the locking pin 141 extends from the housing 110 to stop the cabinet door 220 of the power cabinet 200 from opening outward; in the maintenance state, the warning sign is the maintenance sign, and the locking pin 141 retracts into the housing 110 to release the stop limit on the cabinet door 220 of the power cabinet 200.

[0036] This utility model's technical solution, by setting up a display screen 120, a projection lamp 130, and a locking component 140, allows the display screen 120 to promptly display warning signs, and the projection lamp 130 to project the same warning signs onto the ground in front of the cabinet 200. This eliminates the need for manual labeling, effectively and directly indicating the working status of the cabinet 200, and facilitates timely updates to the cabinet 200's status information. Through the display screen 120 and the projection lamp 130, maintenance personnel can quickly locate the object to be repaired and reach the repair area, preventing them from going to the wrong section and saving search time. In operation, the locking pin 141 extends from the housing 110 to stop the door 220 of the power cabinet 200 from opening outward; in maintenance, the locking pin 141 retracts into the housing 110 to release the stop on the door 220 of the power cabinet 200. The locking component 140 is associated with the state of the cabinet 200, which helps to prevent the door 220 from opening in operation, has an anti-misoperation locking function, further prevents maintenance personnel from going to the wrong interval, and helps to improve the safety and efficiency of power maintenance and avoid the occurrence of power accidents.

[0037] like Figures 1 to 2 As shown, the locking assembly 140 is located on the side near the opening of the cabinet door 220. Figure 4 As shown, in operation, the locking pin 141 has a stop surface 1411 on the side facing the cabinet door 220, as... Figure 5 As shown, the stop surface 1411 is parallel to the cabinet door 220 and forms a limiting gap with the cabinet door 220 to stop and limit the opening of the cabinet door 220. This utility model's technical solution, by setting the locking component 140, can help prevent the cabinet door 220 from opening during operation, thereby improving maintenance efficiency and safety, and preventing electrical accidents.

[0038] In this embodiment, the locking component 140 is an electromagnetic lock, which includes a drive motor and a locking pin 141. The drive motor drives the locking pin 141 to extend and retract through gear meshing.

[0039] Preferably, in this embodiment, when the locking pin 141 extends or retracts, the locking pin 141 can maintain a power-off self-locking state through the drive part 142. The locking component 140 in this utility model has a bistable structure, which can maintain a locked state after power is applied or de-energized, without the need for continuous power supply, which is beneficial to improving the safety and reliability of power maintenance and meets the requirements of energy conservation and environmental protection.

[0040] Specifically, the drive unit 142 includes a solenoid and an iron core (not shown in the figure). When the solenoid is de-energized, it drives the iron core to extend. The iron core drives the locking pin 141 to extend from the housing 110 and restrict the cabinet door 220 from opening outward, thereby locking the cabinet door 220. When the solenoid is energized, it drives the iron core to retract. The iron core drives the locking pin 141 to retract into the housing 110 and separate from the cabinet door 220, thereby unlocking the cabinet door 220.

[0041] like Figure 4 As shown, the end of the locking pin 141 is provided with a pushing surface 1412. The intelligent maintenance warning locking device 100 has an emergency unlocking state. In the emergency unlocking state, pressing the pushing surface 1412 drives the locking pin 141 to retract into the housing 110 to release the stop limit on the cabinet door 220 of the power panel cabinet 200. The technical solution of this utility model, by providing the pushing surface 1412, facilitates the retraction of the locking pin 141 into the housing 110 to unlock the cabinet door 220 in the emergency unlocking state.

[0042] like Figure 6 as well as Figure 8 As shown, the projection lamp 130 includes a running lamp 131 and a maintenance lamp 132 arranged side-by-side in the middle area of ​​the bottom of the housing 110. The light axes of the running lamp 131 and the maintenance lamp 132 are tilted downwards. In operation, the running lamp 131 projects a running indicator onto the ground in front of the cabinet 200; in maintenance, the maintenance lamp 132 projects a maintenance indicator onto the ground in front of the cabinet 200. This utility model's technical solution, through the light guidance of the running lamp 131 and the maintenance lamp 132, facilitates maintenance personnel to quickly locate the object to be maintained and reach the maintenance area, preventing them from going to the wrong section and saving search time.

[0043] Preferably, the projection lamp 130 also includes a light sensor. If the projection light of the running lamp 131 is detected to be blocked, the light sensor triggers an alarm to remind personnel to move away from the running area.

[0044] The housing 110 is used to fix and protect the internal components. Preferably, the housing is made of a waterproof and dustproof material, which can adapt to complex power maintenance environments. Further, the housing 110 is elongated, and its bottom surface is flush with the bottom of the power cabinet 200's header. The back of the housing 110 extends laterally along the header of the power cabinet 200 via a bracket; alternatively, the back of the housing 110 extends laterally along the header of the power cabinet 200 via magnetic attraction, facilitating rapid deployment.

[0045] like Figure 3As shown, the intelligent maintenance warning interlock device 100 also includes a control unit 150, which controls the display screen 120, projection lamp 130, and interlocking component 140 to synchronously switch their working states. The control unit 150 is communicatively connected to the maintenance error prevention system 210 of the cabinet 200 and receives status display information sent by the maintenance error prevention system 210. This utility model's technical solution establishes a communication link between the control unit 150 and the maintenance and error prevention system 210 of the cabinet 200. The intelligent maintenance warning interlock device 100 is managed by the maintenance and error prevention system 210. The maintenance and error prevention system 210 can transmit operation signals and maintenance signals to the control unit 150 according to different states of the cabinet 200. The control unit 150 can respond to the signal commands of the maintenance and error prevention system 210, which is conducive to realizing the electronic deployment of safety measures. The display content of the display screen 120, the projection content of the projection lamp 130, and the interlocking status of the interlocking component 140 can all be controlled through the maintenance and error prevention system 210 and forcibly associated with the task to prevent the situation of incorrect or missing manual tagging.

[0046] In this embodiment, when the locking pin 141 fails to retract and unlock the cabinet door 220 due to the drive unit 142, the control unit 150 can record the abnormal unlocking information of the locking pin 141 and report an alarm. In this utility model, the locking pin 141 can be manually unlocked by pressing the push surface 1412. The control unit 150 can record the abnormal unlocking information of the locking pin 141 and report an alarm. The maintenance error prevention system 210 judges this; if it determines there is no corresponding task, it is considered an abnormal event, which helps improve the safety and efficiency of power maintenance.

[0047] In this embodiment, the display screen 120 can respond to signal commands from the control unit 150. In operation mode, the display screen shows the operation indicator of the display cabinet 200; in maintenance mode, the display screen scrolls the maintenance indicator and maintenance content of the display cabinet 200. Preferably, the display screen is a flexible LED display screen, which facilitates rapid installation and relocation, promotes rapid deployment, and saves energy. The flexible LED display screen is task-associated with the maintenance error prevention system 210. For example, in operation mode, the display screen can show "Running," and in maintenance mode, it can show "Maintaining Maintenance Here." Furthermore, when "Maintaining Maintenance Here" is displayed, the display screen can also scroll through specific maintenance content, such as the specific problem being addressed and the required maintenance time, for easy viewing by maintenance personnel.

[0048] Specifically, in this embodiment, the projection light 130 is task-associated with the maintenance error prevention system 210. For example, in the running state, the operation light 131 can project the words "Running" onto the ground in front of the cabinet 200, and in the maintenance state, the maintenance light 132 can project the words "Maintaining here" onto the ground in front of the cabinet 200. Preferably, the projection colors of the operation light 131 and the maintenance light 132 are different. For example, the "Running" text projected by the operation light 131 is green, and the "Maintaining here" text projected by the maintenance light 132 is red, to improve visibility and ensure that maintenance personnel can quickly identify the status of the cabinet 200, making it easier for them to quickly find the maintenance object and reach the maintenance area, preventing them from going to the wrong interval and saving search time.

[0049] Specifically, the display content of the screen 120, the projection content of the projection lamp 130, and the locking / unlocking status of the locking component 140 are all configured to be linked according to the control commands of the control unit 150, which originate from the maintenance and error prevention system 210 of the cabinet 200. When the screen 120 displays an operation indicator, the projection lamp 130 projects the operation indicator onto the ground in front of the cabinet, and the locking component 140 locks the cabinet door 220; when the screen 120 displays a maintenance indicator, the projection lamp 130 projects a maintenance indicator onto the ground in front of the cabinet, and the locking component 140 unlocks the cabinet door 220. This utility model's technical solution, through dynamic display, projection guidance, and the coordinated operation of the locking component 140, achieves automated status indication, reliable locking, and visualized operation, thereby improving the safety and efficiency of power maintenance.

[0050] In this embodiment, the intelligent maintenance warning interlock device 100 further includes a communication unit, through which the control unit 150 is wirelessly connected to the maintenance error prevention system 210. In this embodiment, the communication unit supports RS485 wired communication and wireless communication. Wireless communication supports communication methods such as Bluetooth, WAPI, or WIFI, which are not limited in this application.

[0051] The specific working steps of the intelligent maintenance warning interlocking device 100 are described below.

[0052] First, the intelligent maintenance warning interlock device 100 is connected to the maintenance error prevention system 210. When the cabinet 200 needs to be maintained, the maintenance error prevention system 210 selects the corresponding intelligent maintenance warning interlock device 100 according to the work order and sends out status display information.

[0053] If the cabinet 200 is initially in the running state, the display screen 120 will show "Running", the running light 131 will light up and project the words "Running" onto the ground in front of the cabinet 200, the locking pin 141 of the locking component 140 will extend out of the housing 110 to stop the cabinet door 220 of the power cabinet 200 from opening outward.

[0054] When the intelligent maintenance warning interlock device 100 receives the issued display command, it changes the display content of the screen 120 from "Running" to "Under Maintenance Here" and scrolls through the specific maintenance information. Simultaneously, the operation light 131 turns off, and the maintenance light 132 illuminates, projecting the words "Under Maintenance Here" onto the ground in front of the cabinet 200. At the same time, the interlock component 140 receives the command, the locking pin 141 retracts, and the locking pin 141 separates from the cabinet door 220 to unlock the cabinet door 220, allowing maintenance personnel to open the cabinet door 220 for equipment maintenance inside the cabinet 200.

[0055] Once the maintenance task is completed, the maintenance error prevention system 210 reissues the instruction, changing the display content of the screen 120 from "Maintaining here" to "Running". Simultaneously, the maintenance light 132 turns off, and the operation light 131 illuminates, projecting the words "Running" onto the ground in front of the power cabinet 200. At the same time, the locking component 140 receives the instruction, and the locking pin 141 extends from the housing 110 to stop the power cabinet 200 door 220 from opening outwards.

[0056] In case of an emergency, the lock pin 141 can be manually pushed back and the cabinet door 220 opened. The control unit 150 can record this event and issue an alarm, and the maintenance error prevention system 210 will assess it. If no corresponding task is determined, it is considered an abnormal event.

[0057] This utility model's technical solution, by setting up a display screen 120, a projection lamp 130, a locking component 140, and a control unit 150, and communicating with the maintenance error prevention system 210 of the power cabinet 200, facilitates remote real-time control and electronic deployment of safety measures. It also provides clear and direct prompts and timely updates on the working status of the power cabinet 200. The display screen 120 and projection lamp 130 guide maintenance personnel to quickly locate the object to be repaired and reach the repair area, saving search time. The locking component 140, linked to the status of the power cabinet 200, prevents the cabinet door 220 from opening while the power cabinet 200 is running, providing an error-prevention locking function and further preventing maintenance personnel from entering the wrong section, thus improving the safety and efficiency of power maintenance. This utility model's technical solution can deploy multiple power cabinets 200 simultaneously, achieving omnidirectional guidance from top to bottom of the cabinet 200.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An intelligent maintenance warning interlock device, installed at the top of a power distribution cabinet, the power distribution cabinet having operating and maintenance states, characterized in that, The intelligent maintenance warning interlocking device includes: a housing, a display screen, a projection lamp, and an interlocking assembly; The display screen and the projection lamp are respectively embedded in the housing. The display screen displays warning signs along the front of the cabinet, while the projection lamp projects the same warning signs onto the ground in front of the cabinet. The warning signs include operation signs and maintenance signs. The locking assembly includes a drive unit and a locking pin installed inside the housing. The drive unit can drive the locking pin to extend and retract. In the operating state, the warning sign is an operating sign, and the locking pin extends from the housing to stop the power cabinet door from opening outward. In the maintenance state, the warning sign is a maintenance sign, and the locking pin retracts into the housing to release the stop on the power cabinet door.

2. The intelligent maintenance warning interlocking device as described in claim 1, characterized in that, The locking component is located on the side near where the cabinet door opens; In the operating state, the locking pin has a stop surface on the side facing the cabinet door. The stop surface is parallel to the cabinet door and forms a limiting gap with the cabinet door to stop and limit the opening of the cabinet door.

3. The intelligent maintenance warning interlocking device as described in claim 1 or 2, characterized in that, The locking assembly is an electromagnetic lock, which includes a drive motor and a locking pin. The drive motor drives the locking pin to extend and retract through gear meshing.

4. The intelligent maintenance warning interlocking device as described in claim 2, characterized in that, When the locking pin extends or retracts, the locking pin can maintain a power-off self-locking state through the drive unit.

5. The intelligent maintenance warning interlocking device as described in claim 2, characterized in that, The end of the locking pin is provided with a pushing surface; the intelligent maintenance warning locking device has an emergency unlocking state. In the emergency unlocking state, pressing the pushing surface drives the locking pin to retract into the housing to release the door stop limit of the power panel cabinet.

6. The intelligent maintenance warning interlocking device as described in claim 1, characterized in that, The driving unit includes a solenoid and an iron core. When the solenoid is de-energized, it drives the iron core to extend, and when the solenoid is energized, it drives the iron core to retract.

7. The intelligent maintenance warning interlocking device as described in claim 1, characterized in that, The projection lamp includes a running lamp and a maintenance lamp arranged side by side in the middle area of ​​the bottom of the housing, and the optical axes of the running lamp and the maintenance lamp are tilted downward. In the operating state, the operating light projects the operating indicator onto the ground in front of the cabinet; and / or, In the maintenance state, the maintenance light projects the maintenance sign onto the ground in front of the cabinet.

8. The intelligent maintenance warning interlocking device as described in claim 1, characterized in that, The housing is elongated, and the bottom surface of the housing is flush with the bottom of the power panel cabinet's header. The back of the housing extends laterally along the top edge of the power distribution cabinet via a bracket; or the back of the housing extends laterally along the top edge of the power distribution cabinet via magnetic attraction.

9. The intelligent maintenance warning interlocking device as described in claim 1, characterized in that, The intelligent maintenance warning interlock device also includes a control unit, which controls the display screen, the projection lamp, and the interlocking component to switch working states synchronously.

10. The intelligent maintenance warning interlocking device as described in claim 9, characterized in that, The control unit is communicatively connected to the maintenance and error prevention system and receives status display information sent by the maintenance and error prevention system.

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