Cabinet door interlocking device with reverse locking

Abstract

The utility model discloses a cabinet door interlocking device with reverse locking. Comprising a compartment partition plate, a slidable interlocking sliding plate installed on the upper plate face of the compartment partition plate, a pair of parallel sliding plate guide rails fixed to the upper plate face of the compartment partition plate, an electromagnetic lock installation plate fixed to the upper surfaces of the sliding plate guide rails, an electromagnetic lock arranged on the electromagnetic lock installation plate and a reset spring, and one end of the reset spring is connected with the interlocking sliding plate. One end of the interlocking sliding plate is connected with an electromagnetic lock mounting plate, the other end of the interlocking sliding plate is connected with an electromagnetic lock mounting plate, an interlocking deflector rod is arranged on the lower plate surface of the interlocking sliding plate, a long sliding hole extending in the sliding direction of the interlocking sliding plate and an avoiding hole allowing a lock rod of the electromagnetic lock to stretch out and draw back are formed in the compartment partition plate, and the interlocking deflector rod penetrates through the long sliding hole downwards and can slide along the long sliding hole to drive the interlocking sliding plate to move front and back. According to the utility model, false locking or failure of the electromagnetic lock can be avoided, and the risk of electric shock can be greatly reduced. The device is simple in structure, reliable in function and easy to implement, and can be suitable for most switch equipment and control equipment of middle and high voltage non-grounding switches.

Description

Technical Field

[0001] This utility model belongs to the field of five-proof interlocking technology of metal-enclosed switchgear and control equipment in the power industry, and particularly relates to a cabinet door interlocking device with reverse locking, which is suitable for locking the cabinet door of cable compartment equipment without a switch or with a two-position switch as the incoming line functional unit. Background Technology

[0002] "Five-proof interlocking" is a crucial safety design principle for high-voltage switchgear (such as high-voltage switchgear) in power systems, aiming to prevent personal injury and equipment damage caused by misoperation. Relevant standards such as IEC 62271-200 and GB 3906 specify clear requirements for equipment interlocking. Therefore, in the design of high-voltage switchgear, comprehensive mechanical and electrical interlocks are installed between the circuit breaker mechanism and the isolating mechanism, between the operation of the isolating switch and the operation of the grounding switch, and between the operation of the grounding switch and the cable compartment door to prevent equipment damage or personnel injury caused by misoperation or accidental entry into live gaps. The cable compartment, as the compartment where personnel are highly likely to come into contact with high-voltage live parts and suffer electric shock, makes the interlocking design of its compartment doors particularly important.

[0003] The standard typical schemes, including the circuit breaker unit scheme, the load switch unit scheme, the load switch-fuse combination electrical appliance unit scheme, and the bus PT cabinet scheme with switch, use the grounding operation of the isolating grounding switch mechanism (usually a three-position mechanism) to lock the cable compartment door. The grounding switch and the cable compartment door are designed with a stable, reliable and easy-to-implement interlock.

[0004] However, there is another type of functional unit scheme without a grounding switch: 1) busbar lifting cabinet unit without a switch; 2) two-position isolating switch circuit breaker unit as the incoming line (without a grounding switch to prevent accidental grounding switch closing when the incoming line is energized). The design of the cable compartment door interlock is difficult. Existing implementation schemes mainly include: 1) installing a mechanical padlock on the cable compartment door; 2) designing a complex mechanical interlocking device in the mechanism room; 3) installing an electromagnetic lock in the mechanism room to unidirectionally lock / unlock the cable compartment door by detecting whether the incoming and outgoing cable bushings are energized; 4) installing an electromagnetic lock on the cable compartment door and cooperating with the cabinet frame to unidirectionally lock / unlock the cable compartment door by detecting whether the incoming and outgoing cable bushings are energized.

[0005] While the above methods have some effect in preventing accidental entry into a live gap, they also have the following drawbacks:

[0006] 1) Complex mechanical interlocking devices are difficult to install, require high coordination, and are hard to implement.

[0007] 2) By installing an electromagnetic lock, the cable compartment door can be locked in one direction. Even when the cable conduit is energized and the cable compartment door is not closed, the electromagnetic lock will still extend its locking rod to complete a "false lock". This can easily give the impression that the cable is not energized, which is quite dangerous for operators and maintenance personnel.

[0008] 3) Install the electromagnetic lock on the cable compartment door. When the cable compartment door is removed and the inlet and outlet cable sleeves are energized again, the electromagnetic lock will be ineffective regardless of whether it is in the locked or unlocked state. Utility Model Content

[0009] The purpose of this utility model is to provide a cabinet door interlocking device with reverse locking that is stable, reliable, simple in structure, easy to implement, and can greatly reduce the risk of electric shock to personnel.

[0010] The purpose of this utility model is achieved through the following technical measures: a cabinet door interlocking device with reverse locking, characterized in that it includes a compartment partition, a slidable interlocking slide plate installed on the upper surface of the compartment partition, a pair of parallel slide rails fixed on the upper surface of the compartment partition and placed on both sides of the interlocking slide plate, an electromagnetic lock mounting plate fixed on the upper surface of the slide rails, an electromagnetic lock with a warning function and a return spring installed on the electromagnetic lock mounting plate, the electromagnetic lock mounting plate being located above the interlocking slide plate, one end of the return spring being connected to the interlocking slide plate and the other end being connected to the electromagnetic lock mounting plate, an interlocking lever for cooperating with the upper locking plate of the cable compartment door being provided on the lower surface of the interlocking slide plate, and an elongated sliding hole extending along the sliding direction of the interlocking slide plate and a slot for the electromagnetic lock being installed on the compartment partition. The interlocking lever has a telescopic clearance hole. The interlocking lever passes downward through an elongated sliding hole and can slide along the elongated sliding hole to drive the interlocking slide plate to move back and forth. When the cable compartment door is open or not fully closed, the interlocking slide plate slides to the limit position of the slide plate guide rail under the action of the return spring, blocking the clearance hole. When the cable compartment inlet and outlet bushings are energized, the electromagnetic lock cannot lock and is in a reverse locking warning state. When the cable compartment door is fully closed, the cable compartment door overcomes the tension of the return spring and pushes the interlocking slide plate backward to expose the clearance hole. When the cable compartment inlet and outlet bushings are energized, the electromagnetic lock lever extends out of the clearance hole and touches the lock plate, and is in an electromagnetic lock state. At this time, the cable compartment door cannot be opened. When the cable compartment inlet and outlet bushings are not energized, the electromagnetic lock lever retracts from the clearance hole and is in an electromagnetic lock unlock state. At this time, the cable compartment door can be opened.

[0011] This invention, when the electromagnetic lock is engaged, can lock the cable compartment door, preventing it from opening. However, if the cable compartment door is not fully closed, or not closed completely, the reverse locking function of this invention prevents the electromagnetic lock from completing the locking operation and triggers an alarm sound, indicating the current "energized" state and reminding operators or maintenance personnel not to approach or touch the high-voltage live parts in the cable compartment. The alarm sound will continue throughout the entire troubleshooting process without automatically interrupting. Once the cause is found and the locking operation can be completed, the alarm function of the electromagnetic lock must be manually reset to stop the alarm sound. Therefore, this invention can avoid "false locking" or failure of the electromagnetic lock, greatly reducing the risk of electric shock. This invention has a simple structure, reliable function, is easy to implement, and is applicable to most switching and control equipment with medium and high voltage ungrounded switches.

[0012] The width between the two sliding guide rails of this utility model is slightly wider than that of the interlocking sliding plate, which restricts the linear motion of the interlocking sliding plate. The thickness of the sliding guide rail is greater than that of the interlocking sliding plate. The electromagnetic lock mounting plate is an L-shaped plate with an electromagnetic lock mounted on its vertical surface and fixed on the horizontal surface of the sliding guide rail. A through hole adapted to the locking rod is provided on the horizontal plate surface.

[0013] The front end of the partition plate of this utility model is provided with a folded edge for positioning the sliding plate guide rail and the electromagnetic lock mounting plate.

[0014] The interlocking slide of this invention has wings on both sides of its rear end. The wings can be engaged with the rear end of the slide rail to limit the forward travel of the interlocking slide.

[0015] The interlocking slide plate of this utility model has a positioning hole at the center line of the wing portion. The lower surface of the interlocking slide plate and the interlocking lever are positioned and pressed together by the positioning hole. An elongated opening is provided at the center line of the front part of the interlocking slide plate.

[0016] This utility model provides a circular through hole at the front of the compartment partition for the extension and retraction of the electromagnetic lock rod. The circular through hole is concentric with the electromagnetic lock rod, and the diameter of the hole is slightly larger than the diameter of the lock rod. An elongated sliding hole is provided at the rear of the compartment partition, through which the interlocking lever passes. The interlocking lever can slide within the elongated sliding hole, and the length of the elongated sliding hole is slightly larger than the sliding stroke of the interlocking lever.

[0017] The interlocking slide plate of this utility model has a folded edge at its rear end and a first spring-loaded hole on the folded edge. The electromagnetic lock mounting plate has a folded edge at its rear end on its horizontal surface and a second spring-loaded hole on the folded edge. The two ends of the reset spring are respectively connected to the first spring-loaded hole and the second spring-loaded hole.

[0018] The interlocking slide, electromagnetic lock mounting plate, electromagnetic lock, reset spring, and slide rail of this utility model are all installed in an independently set mechanism chamber.

[0019] The locking plate of this utility model is a bent plate, the top surface of which is the contact surface that contacts the top of the electromagnetic lock rod, and the rear end surface of which is the pushing surface for pushing the interlocking lever.

[0020] The cable compartment door panel of this utility model can be slidably installed on a pair of door panel guide rails located on the left and right sides of the cable compartment door. The locking plate is fixed on the top surface of the door panel, and a hanging tooth is provided on the back of the door panel. The door panel guide rails have hanging tooth holes for the hanging tooth to engage.

[0021] The electromagnetic lock described in this utility model has an early warning function. When the lock rod is in a non-locked / unlocked position due to factors such as jamming or obstruction, the electromagnetic lock will sound a continuous alarm and will not automatically interrupt the alarm. The alarm needs to be manually reset after troubleshooting.

[0022] Compared with the prior art, the present invention has the following significant advantages:

[0023] (1) When the electromagnetic lock is engaged, this utility model can lock the cable compartment door so that it cannot be opened. Before the cable compartment door is closed, the reverse locking function of this utility model can prevent the electromagnetic lock from completing the locking operation and trigger an alarm sound to warn of the current "energized" state, reminding operators or maintenance personnel not to approach or touch the high-voltage live parts of the cable compartment. After the abnormality is eliminated, the alarm must be manually released. Therefore, this utility model can avoid the occurrence of "false locking" or failure of the electromagnetic lock, and can greatly reduce the risk of electric shock. This utility model has a simple structure, reliable function, and is easy to implement. It can be applied to most switching equipment and control equipment with medium and high voltage ungrounded switches.

[0024] (2) The reverse locking function of this utility model in the open state, compared with the conventional one-way locking device, can perfectly prevent the electromagnetic lock from "false locking" and the appearance that the cable chamber inlet and outlet bushings are not energized, greatly reducing the risk of electric shock caused by operators and maintenance personnel accidentally entering the energized gap.

[0025] (3) The early warning function of this utility model can reduce the occurrence of electromagnetic lock jamming and cable compartment door not being closed / leaving open.

[0026] (4) The main body of this utility model is installed in the interior of the mechanism and is installed separately from the cable room door assembly. Compared with the integrated installation method where the electromagnetic lock is directly installed on the cable room door, the electromagnetic lock will not fail when the cable room door is moved.

[0027] (5) The electromagnetic lock of this utility model is installed in an independently set compartment without other mechanisms. It has sufficient space and is easy to install. Even if the electromagnetic lock fails, it can be replaced safely without power interruption.

[0028] (6) This utility model has a reverse locking function, which is applicable not only to electromagnetic locks but also to mechanical program locks. If the cable room door is not closed, the program lock cannot reach the locked state, the key cannot be pulled out, and the upper switch cannot be unlocked with this key to perform power supply operation, which can ensure that the inlet and outlet bushings of this level cable room are not energized. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 This is a side view of the present invention;

[0031] Figure 2 This is the front view of this utility model;

[0032] Figure 3 This is a top view of the present invention;

[0033] Figure 4 yes Figure 3 Enlarged view of part A in the diagram;

[0034] Figure 5 This is a side view of the assembly of the compartment partition, interlocking slide plate, interlocking lever, electromagnetic lock mounting plate and return spring of this utility model;

[0035] Figure 6 This is a schematic diagram of the present invention in the closed and locked state;

[0036] Figure 7 This is a schematic diagram of the present invention in the closed and unlocked state;

[0037] Figure 8 This is a schematic diagram of the present invention in the reverse locking warning state;

[0038] Figure 9 yes Figure 8 A magnified view of part B in the diagram.

[0039] In the diagram: 1-Electromagnetic lock mounting plate, 2-Electromagnetic lock, 3-Interlocking slide plate, 4-Reset spring, 5-Compartment partition, 6-Interlocking lever, 7-Slide plate guide rail, 8-Cable compartment door assembly, 9-Door panel guide rail, 10-Door panel, 11-Lock plate, 12-Elongated sliding hole, 13-Allowing hole, 14-Cable compartment, 15-Lock rod, 16-Elongated opening, 17-Mechanism compartment, 18-Hanging tooth, 19-Hanging tooth hole, 20-Through hole, 21-Contact surface, 22-Pushing surface, 23-Screw, 24-Wing, 25-Air chamber. Detailed Implementation

[0040] 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.

[0041] like Figures 1-9 As shown, this utility model discloses a cabinet door interlocking device with reverse locking, including a partition plate 5 for separating the mechanism chamber 17 and the cable chamber 14, a slidable interlocking slide plate 3 installed on the upper surface of the partition plate 5, a pair of parallel slide rails 7 fixed on the upper surface of the partition plate 5 and placed on both sides of the interlocking slide plate 3, an electromagnetic lock mounting plate 1 fixed on the upper surface of the slide rails 7, an electromagnetic lock 2 with a warning function and a return spring 4 set on the electromagnetic lock mounting plate 1. The interlocking slide plate 3, the electromagnetic lock mounting plate 1, the electromagnetic lock 2, the return spring 4 and the slide rails 7 are all installed in the independently set mechanism chamber 17 and located above the partition plate 5. Behind the mechanism chamber 17 and the cable chamber 14 is the air chamber 25. The electromagnetic lock mounting plate 1 is located above the interlocking slide plate 3. One end of the return spring 4 is connected to the interlocking slide plate 3, and the other end is connected to the electromagnetic lock mounting plate 1. The lower plate surface of the interlocking slide plate 3 is provided with an interlocking lever 6 for cooperating with the upper locking plate 11 of the cable chamber door 10. The partition plate 5 of the compartment is provided with an elongated sliding hole 12 extending along the sliding direction of the interlocking slide plate 3 and a clearance hole 13 for the extension and retraction of the locking rod 15 of the electromagnetic lock 2. The interlocking lever 6 passes downward through the elongated sliding hole 12 and can slide along the elongated sliding hole 12 to drive the interlocking slide plate 3 to move back and forth. When the cable chamber door is open or not closed in place, the interlocking... Under the action of the return spring 4, the slide plate 3 slides to the limit position of the slide plate guide rail 7 to block the clearance hole 13. When the cable chamber inlet and outlet bushings are energized, the electromagnetic lock cannot lock and is in a reverse locking warning state. When the cable chamber door is closed, the cable chamber door overcomes the tension of the return spring and pushes the interlock slide plate 3 to move backward to expose the clearance hole 13. When the cable chamber inlet and outlet bushings are energized, the electromagnetic lock rod 15 extends out of the clearance hole 13 and touches the lock plate 11, and is in the electromagnetic lock locked state. At this time, the cable chamber door cannot be opened. When the cable chamber inlet and outlet bushings are not energized, the electromagnetic lock rod 15 retracts from the clearance hole 13 and is in the electromagnetic lock unlocked state. At this time, the cable chamber door can be opened.

[0042] A pair of sliding guide rails 7 are fixed to the upper surface of the compartment partition 5 with screws 23. The interlocking sliding plate 3 is located between and slidably connected to the pair of sliding guide rails 7, allowing the interlocking sliding plate 3 to be slidably installed on the compartment partition 5. The thickness of the sliding guide rails 7 is greater than the thickness of the interlocking sliding plate 3. The electromagnetic lock mounting plate 1 is an L-shaped plate, with an electromagnetic lock 2 installed on its vertical surface and fixed to the sliding guide rails 7 on its horizontal surface by screws 23. A through hole 20 adapted to the locking rod 15 is provided on this horizontal plate surface. An elongated opening 16 is provided at the center line of the front part of the interlocking sliding plate 3.

[0043] Both the elongated sliding hole 12 and the elongated opening 16 are racetrack-shaped holes.

[0044] The rear end of the interlocking slide plate 3 is provided with a folded edge and a first spring hole is provided on the folded edge. The rear end of the horizontal surface of the electromagnetic lock mounting plate 1 is provided with a folded edge and a second spring hole is provided on the folded edge. The first spring hole and the second spring hole are coaxial. The two ends of the return spring 4 are respectively connected to the first spring hole and the second spring hole, and the return spring 4 is in a stretched state.

[0045] The cable compartment door assembly 8 and door panel guide rail 9 are installed below the compartment partition 5. The locking plate 11 is fixed to the top surface of the door panel 10. The locking plate 11 is a bent plate, the top surface of which is the contact surface 21 that contacts the electromagnetic lock rod 15, and the rear end surface is the pushing surface 22 for pushing the interlocking lever 6. The cable compartment door panel 10 is slidably installed on a pair of door panel guide rails 9 located on the left and right sides of the cable compartment door. The back of the door panel 10 is provided with a hook tooth 18, and the door panel guide rail 9 has a hook tooth hole 19 for the hook tooth 18 to engage. When the door panel 10 moves upward, the hook tooth 18 can disengage from the hook tooth hole 19, at which time the door panel 10 can move forward and open. When the electromagnetic lock 2 locks and extends the locking rod 15, the locking rod 15 can just abut against the upper surface of the locking plate 11.

[0046] The electromagnetic lock rod 15 and interlocking lever 6 can extend out of the mechanism chamber 17 through the partition plate 5 to cooperate with the cable chamber door assembly 8 for locking and unlocking operations. When the cable chamber 14 inlet and outlet bushings are energized, the electromagnetic lock rod 15 extends and presses against the door panel assembly, the door panel has no upward lifting stroke, and the door panel teeth are obstructed by the door panel guide rail, so the cable chamber door cannot be opened. When the cable conduit in and out of the cable compartment 14 is not energized, the electromagnetic lock 2 unlocks, and the locking rod 15 retracts upwards above the compartment partition 5, providing upward travel space for the door panel assembly. The door panel 10 is then lifted, and the hook teeth 18 on the door panel 10 disengage from the hook tooth holes 19 on the door panel guide rail 9, allowing the cable compartment door to open. At this time, the interlocking slide plate 3 moves forward under the action of the return spring 4, blocking the extension and retraction direction of the electromagnetic lock rod 15 (this blocking is released by closing the cable compartment door). If the cable conduit becomes energized again, the electromagnetic lock 2 cannot lock because the locking rod 15 is blocked, triggering the reverse locking function. At this time, the electromagnetic lock will sound an alarm, indicating locking failure and warning operators: 1) The cable compartment door is not closed or not closed properly; 2) The high-voltage live parts in the cable compartment are energized at this time, do not touch them. After correcting the misoperation, the alarm must be manually deactivated.

[0047] The elongated sliding hole on the compartment partition 5 is a racetrack-shaped hole, and its length is slightly greater than the travel of the interlocking lever 6. The clearance hole 13 on the compartment partition 5 is coaxial with the locking lever 15 and its diameter is greater than the outer diameter of the locking lever 15. There are double screw holes on the compartment partition 5 for fixing the sliding plate guide rail 7 and the electromagnetic lock mounting plate 1. There is a folded edge at the front end of the compartment partition 5. The screw holes are positioned with the folded edge of the partition to install two parallel sliding plate guide rails 7, one on the left and one on the right. The distance between them is slightly wider than that between the interlocking sliding plate 3. The thickness of the sliding plate guide rail 7 is slightly thicker than that between the interlocking sliding plate 3 to prevent the interlocking sliding plate 3 from getting stuck when it slides back and forth.

[0048] The interlocking slide plate 3 has wings 24 on both sides of its rear end. The wings 24 can engage with the rear end of the slide plate guide rail 7 to limit the forward travel of the interlocking slide plate 3. A positioning hole is provided at the center line of the wing of the interlocking slide plate 3. The lower surface of the interlocking slide plate 3 and the interlocking lever 6 are positioned and pressed together by the positioning hole.

[0049] The working process of this utility model is as follows:

[0050] 1. Closed and Locked State: During the process of the cable compartment door panel being hooked onto the door panel guide rail, the locking plate at the upper end of the door panel overcomes the tension of the return spring and pushes the interlocking lever backward, causing the interlocking slide plate to move towards the mechanism chamber side. The elongated opening on the interlocking slide plate aligns with the clearance hole on the partition plate of the compartment, releasing the obstruction of the locking lever. At this time, if the cable compartment inlet and outlet bushings are energized, the electromagnetic lock engages, the locking lever extends, and presses against the locking plate at the upper end of the cable compartment door panel. The cable compartment door panel has no upward lifting space, and the hook teeth on the cable compartment door panel are restricted by the door panel guide rail, preventing the cable compartment door panel from opening, thus completing the locking process. See also Figure 5 .

[0051] 2. Closed / Unlocked State: With the cable compartment door panel hooked onto the door panel guide rail, and the clearance holes on the interlocking slide plate and the compartment partition aligned with the locking rod axis, if the cable compartment inlet and outlet bushings are not energized, the electromagnetic lock is in the unlocked state. The locking rod retracts a certain distance above the interlocking slide plate, releasing the restriction on the upper locking plate of the cable compartment door panel, allowing space for the cable compartment door to lift. As the cable compartment door lifts, the hook teeth are no longer restricted by the door panel guide rail, and the cable compartment door can be safely opened. (See also...) Figure 6 .

[0052] 3. Reverse Locking Warning State: With the cable compartment door open, the interlocking lever, driven by the return spring, moves the interlocking slide plate forward. Restricted by the butterfly wing at the rear of the interlocking slide plate, it stops at a designated position. At this time, the elongated opening on the interlocking slide plate is not coaxial with the electromagnetic lock rod and is offset by a certain distance, obstructing the clearance hole on the compartment partition. If the cable compartment's inlet and outlet bushings are energized, the electromagnetic lock will be in a position between "locked" and "unlocked" due to the obstruction of the interlocking slide plate. The electromagnetic lock will fail to lock, triggering its reverse locking warning function. At this time, the electromagnetic lock will sound an alarm, indicating locking failure and warning the operator: 1) The cable compartment door is not closed or not closed properly; 2) The high-voltage live parts in the cable compartment are energized at this time; do not touch them. After correcting the misoperation, manually deactivate the alarm.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cabinet door interlocking device with reverse locking, characterized in that: The system includes a compartment partition, a slidable interlocking slide plate mounted on the surface of the compartment partition, a pair of parallel slide rails fixed to the surface of the compartment partition and positioned on both sides of the interlocking slide plate, an electromagnetic lock mounting plate fixed to the upper surface of the slide rails, an electromagnetic lock with a warning function mounted on the electromagnetic lock mounting plate, and a return spring. The electromagnetic lock mounting plate is located above the interlocking slide plate. One end of the return spring is connected to the interlocking slide plate, and the other end is connected to the electromagnetic lock mounting plate. The lower surface of the interlocking slide plate is provided with an interlocking lever for engaging with the upper locking plate of the cable compartment door. The compartment partition has an elongated sliding hole extending along the sliding direction of the interlocking slide plate and a clearance hole for the extension and retraction of the electromagnetic lock lever. The interlocking lever passes downward through... The elongated sliding hole allows the interlocking slide plate to move back and forth. When the cable compartment door is open or not fully closed, the interlocking slide plate slides to the limit position of the slide plate guide rail under the action of the return spring, blocking the clearance hole. When the cable compartment inlet and outlet bushings are energized, the electromagnetic lock cannot lock and is in a reverse locking warning state. When the cable compartment door is fully closed, the cable compartment door overcomes the tension of the return spring and pushes the interlocking slide plate backward to expose the clearance hole. When the cable compartment inlet and outlet bushings are energized, the electromagnetic lock rod extends out of the clearance hole and touches the lock plate, thus being in an electromagnetic lock state. At this time, the cable compartment door cannot be opened. When the cable compartment inlet and outlet bushings are not energized, the electromagnetic lock rod retracts from the clearance hole and is in an electromagnetic lock unlock state, at which time the cable compartment door can be opened.

2. The cabinet door interlocking device with reverse locking according to claim 1, characterized in that: The width between the two sliding guide rails is greater than the width of the interlocking sliding plate, constraining the linear motion of the interlocking sliding plate forward and backward; the thickness of the sliding guide rail is greater than the thickness of the interlocking sliding plate; the electromagnetic lock mounting plate is an L-shaped plate, with an electromagnetic lock mounted on its vertical surface and fixed on the horizontal surface of the sliding guide rail, and a through hole adapted to the locking rod is provided on the horizontal surface.

3. The cabinet door interlocking device with reverse locking according to claim 2, characterized in that: The front end of the compartment partition is provided with a folded edge for positioning the sliding plate guide rail and the electromagnetic lock mounting plate.

4. The cabinet door interlocking device with reverse locking according to claim 3, characterized in that: The interlocking slide plate has wings on both sides of its rear end, which can engage with the rear end of the slide plate guide rail to limit the forward travel of the interlocking slide plate.

5. The cabinet door interlocking device with reverse locking according to claim 4, characterized in that: A positioning hole is provided at the center line of the interlocking slide plate wing. The lower surface of the interlocking slide plate and the interlocking lever are positioned and pressed together by the positioning hole. An elongated opening is provided at the center line of the front part of the interlocking slide plate.

6. The cabinet door interlocking device with reverse locking according to claim 5, characterized in that: The rear end of the interlocking slide plate is provided with a folded edge and a first spring-loaded hole is provided on the folded edge. The rear end of the horizontal surface of the electromagnetic lock mounting plate is provided with a folded edge and a second spring-loaded hole is provided on the folded edge. The two ends of the reset spring are respectively connected to the first spring-loaded hole and the second spring-loaded hole.

7. The cabinet door interlocking device with reverse locking according to claim 6, characterized in that: The interlocking slide plate, electromagnetic lock mounting plate, electromagnetic lock, reset spring, and slide rail are all installed in a separately set mechanism room.

8. The cabinet door interlocking device with reverse locking according to claim 7, characterized in that: The locking plate is a bent plate with its top surface being the contact surface that contacts the top of the electromagnetic lock rod, and its rear end surface being the pushing surface for pushing the interlocking lever.

9. The cabinet door interlocking device with reverse locking according to claim 8, characterized in that: The cable compartment door panel can be slidably installed on a pair of door panel guide rails located on the left and right sides of the cable compartment door. The locking plate is fixed on the top surface of the door panel, and a hanging tooth is provided on the back of the door panel. The door panel guide rails have hanging tooth holes for the hanging tooth to engage.

10. The cabinet door interlocking device with reverse locking according to claim 9, characterized in that: The electromagnetic lock's warning function is triggered and emits a long beep when the lock lever is in the non-locked / unlocked position, and the beep warning can be manually reset to interrupt it.

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